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_VLAN_FEATURES \
1206 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1207 NETIF_F_HW_VLAN_FILTER)
1210 * Compute the common dev->feature set available to all slaves. Some
1211 * feature bits are managed elsewhere, so preserve those feature bits
1212 * on the master device.
1214 static int bond_compute_features(struct bonding
*bond
)
1216 struct slave
*slave
;
1217 struct net_device
*bond_dev
= bond
->dev
;
1218 unsigned long features
= bond_dev
->features
;
1219 unsigned short max_hard_header_len
= ETH_HLEN
;
1222 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1223 features
|= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
1224 NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1226 bond_for_each_slave(bond
, slave
, i
) {
1227 features
= netdev_compute_features(features
,
1228 slave
->dev
->features
);
1229 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1230 max_hard_header_len
= slave
->dev
->hard_header_len
;
1233 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1234 bond_dev
->features
= features
;
1235 bond_dev
->hard_header_len
= max_hard_header_len
;
1240 /* enslave device <slave> to bond device <master> */
1241 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1243 struct bonding
*bond
= bond_dev
->priv
;
1244 struct slave
*new_slave
= NULL
;
1245 struct dev_mc_list
*dmi
;
1246 struct sockaddr addr
;
1248 int old_features
= bond_dev
->features
;
1251 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1252 slave_dev
->do_ioctl
== NULL
) {
1253 printk(KERN_WARNING DRV_NAME
1254 ": %s: Warning: no link monitoring support for %s\n",
1255 bond_dev
->name
, slave_dev
->name
);
1258 /* bond must be initialized by bond_open() before enslaving */
1259 if (!(bond_dev
->flags
& IFF_UP
)) {
1260 dprintk("Error, master_dev is not up\n");
1264 /* already enslaved */
1265 if (slave_dev
->flags
& IFF_SLAVE
) {
1266 dprintk("Error, Device was already enslaved\n");
1270 /* vlan challenged mutual exclusion */
1271 /* no need to lock since we're protected by rtnl_lock */
1272 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1273 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1274 if (!list_empty(&bond
->vlan_list
)) {
1275 printk(KERN_ERR DRV_NAME
1276 ": %s: Error: cannot enslave VLAN "
1277 "challenged slave %s on VLAN enabled "
1278 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1282 printk(KERN_WARNING DRV_NAME
1283 ": %s: Warning: enslaved VLAN challenged "
1284 "slave %s. Adding VLANs will be blocked as "
1285 "long as %s is part of bond %s\n",
1286 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1288 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1291 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1292 if (bond
->slave_cnt
== 0) {
1293 /* First slave, and it is not VLAN challenged,
1294 * so remove the block of adding VLANs over the bond.
1296 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1301 * Old ifenslave binaries are no longer supported. These can
1302 * be identified with moderate accurary by the state of the slave:
1303 * the current ifenslave will set the interface down prior to
1304 * enslaving it; the old ifenslave will not.
1306 if ((slave_dev
->flags
& IFF_UP
)) {
1307 printk(KERN_ERR DRV_NAME
": %s is up. "
1308 "This may be due to an out of date ifenslave.\n",
1311 goto err_undo_flags
;
1314 if (slave_dev
->set_mac_address
== NULL
) {
1315 printk(KERN_ERR DRV_NAME
1316 ": %s: Error: The slave device you specified does "
1317 "not support setting the MAC address. "
1318 "Your kernel likely does not support slave "
1319 "devices.\n", bond_dev
->name
);
1321 goto err_undo_flags
;
1324 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1327 goto err_undo_flags
;
1330 /* save slave's original flags before calling
1331 * netdev_set_master and dev_open
1333 new_slave
->original_flags
= slave_dev
->flags
;
1336 * Save slave's original ("permanent") mac address for modes
1337 * that need it, and for restoring it upon release, and then
1338 * set it to the master's address
1340 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1343 * Set slave to master's mac address. The application already
1344 * set the master's mac address to that of the first slave
1346 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1347 addr
.sa_family
= slave_dev
->type
;
1348 res
= dev_set_mac_address(slave_dev
, &addr
);
1350 dprintk("Error %d calling set_mac_address\n", res
);
1354 res
= netdev_set_master(slave_dev
, bond_dev
);
1356 dprintk("Error %d calling netdev_set_master\n", res
);
1359 /* open the slave since the application closed it */
1360 res
= dev_open(slave_dev
);
1362 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1363 goto err_restore_mac
;
1366 new_slave
->dev
= slave_dev
;
1367 slave_dev
->priv_flags
|= IFF_BONDING
;
1369 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1370 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1371 /* bond_alb_init_slave() must be called before all other stages since
1372 * it might fail and we do not want to have to undo everything
1374 res
= bond_alb_init_slave(bond
, new_slave
);
1376 goto err_unset_master
;
1380 /* If the mode USES_PRIMARY, then the new slave gets the
1381 * master's promisc (and mc) settings only if it becomes the
1382 * curr_active_slave, and that is taken care of later when calling
1383 * bond_change_active()
1385 if (!USES_PRIMARY(bond
->params
.mode
)) {
1386 /* set promiscuity level to new slave */
1387 if (bond_dev
->flags
& IFF_PROMISC
) {
1388 dev_set_promiscuity(slave_dev
, 1);
1391 /* set allmulti level to new slave */
1392 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1393 dev_set_allmulti(slave_dev
, 1);
1396 /* upload master's mc_list to new slave */
1397 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1398 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1402 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1403 /* add lacpdu mc addr to mc list */
1404 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1406 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1409 bond_add_vlans_on_slave(bond
, slave_dev
);
1411 write_lock_bh(&bond
->lock
);
1413 bond_attach_slave(bond
, new_slave
);
1415 new_slave
->delay
= 0;
1416 new_slave
->link_failure_count
= 0;
1418 bond_compute_features(bond
);
1420 new_slave
->last_arp_rx
= jiffies
;
1422 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1423 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1425 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1427 * miimon is set but a bonded network driver
1428 * does not support ETHTOOL/MII and
1429 * arp_interval is not set. Note: if
1430 * use_carrier is enabled, we will never go
1431 * here (because netif_carrier is always
1432 * supported); thus, we don't need to change
1433 * the messages for netif_carrier.
1435 printk(KERN_WARNING DRV_NAME
1436 ": %s: Warning: MII and ETHTOOL support not "
1437 "available for interface %s, and "
1438 "arp_interval/arp_ip_target module parameters "
1439 "not specified, thus bonding will not detect "
1440 "link failures! see bonding.txt for details.\n",
1441 bond_dev
->name
, slave_dev
->name
);
1442 } else if (link_reporting
== -1) {
1443 /* unable get link status using mii/ethtool */
1444 printk(KERN_WARNING DRV_NAME
1445 ": %s: Warning: can't get link status from "
1446 "interface %s; the network driver associated "
1447 "with this interface does not support MII or "
1448 "ETHTOOL link status reporting, thus miimon "
1449 "has no effect on this interface.\n",
1450 bond_dev
->name
, slave_dev
->name
);
1454 /* check for initial state */
1455 if (!bond
->params
.miimon
||
1456 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1457 if (bond
->params
.updelay
) {
1458 dprintk("Initial state of slave_dev is "
1459 "BOND_LINK_BACK\n");
1460 new_slave
->link
= BOND_LINK_BACK
;
1461 new_slave
->delay
= bond
->params
.updelay
;
1463 dprintk("Initial state of slave_dev is "
1465 new_slave
->link
= BOND_LINK_UP
;
1467 new_slave
->jiffies
= jiffies
;
1469 dprintk("Initial state of slave_dev is "
1470 "BOND_LINK_DOWN\n");
1471 new_slave
->link
= BOND_LINK_DOWN
;
1474 if (bond_update_speed_duplex(new_slave
) &&
1475 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1476 printk(KERN_WARNING DRV_NAME
1477 ": %s: Warning: failed to get speed and duplex from %s, "
1478 "assumed to be 100Mb/sec and Full.\n",
1479 bond_dev
->name
, new_slave
->dev
->name
);
1481 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1482 printk(KERN_WARNING DRV_NAME
1483 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1484 "support in base driver for proper aggregator "
1485 "selection.\n", bond_dev
->name
);
1489 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1490 /* if there is a primary slave, remember it */
1491 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1492 bond
->primary_slave
= new_slave
;
1496 switch (bond
->params
.mode
) {
1497 case BOND_MODE_ACTIVEBACKUP
:
1498 bond_set_slave_inactive_flags(new_slave
);
1499 bond_select_active_slave(bond
);
1501 case BOND_MODE_8023AD
:
1502 /* in 802.3ad mode, the internal mechanism
1503 * will activate the slaves in the selected
1506 bond_set_slave_inactive_flags(new_slave
);
1507 /* if this is the first slave */
1508 if (bond
->slave_cnt
== 1) {
1509 SLAVE_AD_INFO(new_slave
).id
= 1;
1510 /* Initialize AD with the number of times that the AD timer is called in 1 second
1511 * can be called only after the mac address of the bond is set
1513 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1514 bond
->params
.lacp_fast
);
1516 SLAVE_AD_INFO(new_slave
).id
=
1517 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1520 bond_3ad_bind_slave(new_slave
);
1524 new_slave
->state
= BOND_STATE_ACTIVE
;
1525 if ((!bond
->curr_active_slave
) &&
1526 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1527 /* first slave or no active slave yet, and this link
1528 * is OK, so make this interface the active one
1530 bond_change_active_slave(bond
, new_slave
);
1532 bond_set_slave_inactive_flags(new_slave
);
1536 dprintk("This slave is always active in trunk mode\n");
1538 /* always active in trunk mode */
1539 new_slave
->state
= BOND_STATE_ACTIVE
;
1541 /* In trunking mode there is little meaning to curr_active_slave
1542 * anyway (it holds no special properties of the bond device),
1543 * so we can change it without calling change_active_interface()
1545 if (!bond
->curr_active_slave
) {
1546 bond
->curr_active_slave
= new_slave
;
1549 } /* switch(bond_mode) */
1551 bond_set_carrier(bond
);
1553 write_unlock_bh(&bond
->lock
);
1555 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1557 goto err_unset_master
;
1559 printk(KERN_INFO DRV_NAME
1560 ": %s: enslaving %s as a%s interface with a%s link.\n",
1561 bond_dev
->name
, slave_dev
->name
,
1562 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1563 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1565 /* enslave is successful */
1568 /* Undo stages on error */
1570 netdev_set_master(slave_dev
, NULL
);
1573 dev_close(slave_dev
);
1576 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1577 addr
.sa_family
= slave_dev
->type
;
1578 dev_set_mac_address(slave_dev
, &addr
);
1584 bond_dev
->features
= old_features
;
1590 * Try to release the slave device <slave> from the bond device <master>
1591 * It is legal to access curr_active_slave without a lock because all the function
1594 * The rules for slave state should be:
1595 * for Active/Backup:
1596 * Active stays on all backups go down
1597 * for Bonded connections:
1598 * The first up interface should be left on and all others downed.
1600 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1602 struct bonding
*bond
= bond_dev
->priv
;
1603 struct slave
*slave
, *oldcurrent
;
1604 struct sockaddr addr
;
1605 int mac_addr_differ
;
1607 /* slave is not a slave or master is not master of this slave */
1608 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1609 (slave_dev
->master
!= bond_dev
)) {
1610 printk(KERN_ERR DRV_NAME
1611 ": %s: Error: cannot release %s.\n",
1612 bond_dev
->name
, slave_dev
->name
);
1616 write_lock_bh(&bond
->lock
);
1618 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1620 /* not a slave of this bond */
1621 printk(KERN_INFO DRV_NAME
1622 ": %s: %s not enslaved\n",
1623 bond_dev
->name
, slave_dev
->name
);
1624 write_unlock_bh(&bond
->lock
);
1628 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1631 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1632 printk(KERN_WARNING DRV_NAME
1633 ": %s: Warning: the permanent HWaddr of %s "
1634 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1635 "still in use by %s. Set the HWaddr of "
1636 "%s to a different address to avoid "
1640 slave
->perm_hwaddr
[0],
1641 slave
->perm_hwaddr
[1],
1642 slave
->perm_hwaddr
[2],
1643 slave
->perm_hwaddr
[3],
1644 slave
->perm_hwaddr
[4],
1645 slave
->perm_hwaddr
[5],
1650 /* Inform AD package of unbinding of slave. */
1651 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1652 /* must be called before the slave is
1653 * detached from the list
1655 bond_3ad_unbind_slave(slave
);
1658 printk(KERN_INFO DRV_NAME
1659 ": %s: releasing %s interface %s\n",
1661 (slave
->state
== BOND_STATE_ACTIVE
)
1662 ? "active" : "backup",
1665 oldcurrent
= bond
->curr_active_slave
;
1667 bond
->current_arp_slave
= NULL
;
1669 /* release the slave from its bond */
1670 bond_detach_slave(bond
, slave
);
1672 bond_compute_features(bond
);
1674 if (bond
->primary_slave
== slave
) {
1675 bond
->primary_slave
= NULL
;
1678 if (oldcurrent
== slave
) {
1679 bond_change_active_slave(bond
, NULL
);
1682 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1683 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1684 /* Must be called only after the slave has been
1685 * detached from the list and the curr_active_slave
1686 * has been cleared (if our_slave == old_current),
1687 * but before a new active slave is selected.
1689 bond_alb_deinit_slave(bond
, slave
);
1692 if (oldcurrent
== slave
)
1693 bond_select_active_slave(bond
);
1695 if (bond
->slave_cnt
== 0) {
1696 bond_set_carrier(bond
);
1698 /* if the last slave was removed, zero the mac address
1699 * of the master so it will be set by the application
1700 * to the mac address of the first slave
1702 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1704 if (list_empty(&bond
->vlan_list
)) {
1705 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1707 printk(KERN_WARNING DRV_NAME
1708 ": %s: Warning: clearing HW address of %s while it "
1709 "still has VLANs.\n",
1710 bond_dev
->name
, bond_dev
->name
);
1711 printk(KERN_WARNING DRV_NAME
1712 ": %s: When re-adding slaves, make sure the bond's "
1713 "HW address matches its VLANs'.\n",
1716 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1717 !bond_has_challenged_slaves(bond
)) {
1718 printk(KERN_INFO DRV_NAME
1719 ": %s: last VLAN challenged slave %s "
1720 "left bond %s. VLAN blocking is removed\n",
1721 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1722 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1725 write_unlock_bh(&bond
->lock
);
1727 /* must do this from outside any spinlocks */
1728 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1730 bond_del_vlans_from_slave(bond
, slave_dev
);
1732 /* If the mode USES_PRIMARY, then we should only remove its
1733 * promisc and mc settings if it was the curr_active_slave, but that was
1734 * already taken care of above when we detached the slave
1736 if (!USES_PRIMARY(bond
->params
.mode
)) {
1737 /* unset promiscuity level from slave */
1738 if (bond_dev
->flags
& IFF_PROMISC
) {
1739 dev_set_promiscuity(slave_dev
, -1);
1742 /* unset allmulti level from slave */
1743 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1744 dev_set_allmulti(slave_dev
, -1);
1747 /* flush master's mc_list from slave */
1748 bond_mc_list_flush(bond_dev
, slave_dev
);
1751 netdev_set_master(slave_dev
, NULL
);
1753 /* close slave before restoring its mac address */
1754 dev_close(slave_dev
);
1756 /* restore original ("permanent") mac address */
1757 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1758 addr
.sa_family
= slave_dev
->type
;
1759 dev_set_mac_address(slave_dev
, &addr
);
1761 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1762 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1767 return 0; /* deletion OK */
1771 * This function releases all slaves.
1773 static int bond_release_all(struct net_device
*bond_dev
)
1775 struct bonding
*bond
= bond_dev
->priv
;
1776 struct slave
*slave
;
1777 struct net_device
*slave_dev
;
1778 struct sockaddr addr
;
1780 write_lock_bh(&bond
->lock
);
1782 netif_carrier_off(bond_dev
);
1784 if (bond
->slave_cnt
== 0) {
1788 bond
->current_arp_slave
= NULL
;
1789 bond
->primary_slave
= NULL
;
1790 bond_change_active_slave(bond
, NULL
);
1792 while ((slave
= bond
->first_slave
) != NULL
) {
1793 /* Inform AD package of unbinding of slave
1794 * before slave is detached from the list.
1796 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1797 bond_3ad_unbind_slave(slave
);
1800 slave_dev
= slave
->dev
;
1801 bond_detach_slave(bond
, slave
);
1803 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1804 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1805 /* must be called only after the slave
1806 * has been detached from the list
1808 bond_alb_deinit_slave(bond
, slave
);
1811 bond_compute_features(bond
);
1813 /* now that the slave is detached, unlock and perform
1814 * all the undo steps that should not be called from
1817 write_unlock_bh(&bond
->lock
);
1819 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1820 bond_del_vlans_from_slave(bond
, slave_dev
);
1822 /* If the mode USES_PRIMARY, then we should only remove its
1823 * promisc and mc settings if it was the curr_active_slave, but that was
1824 * already taken care of above when we detached the slave
1826 if (!USES_PRIMARY(bond
->params
.mode
)) {
1827 /* unset promiscuity level from slave */
1828 if (bond_dev
->flags
& IFF_PROMISC
) {
1829 dev_set_promiscuity(slave_dev
, -1);
1832 /* unset allmulti level from slave */
1833 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1834 dev_set_allmulti(slave_dev
, -1);
1837 /* flush master's mc_list from slave */
1838 bond_mc_list_flush(bond_dev
, slave_dev
);
1841 netdev_set_master(slave_dev
, NULL
);
1843 /* close slave before restoring its mac address */
1844 dev_close(slave_dev
);
1846 /* restore original ("permanent") mac address*/
1847 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1848 addr
.sa_family
= slave_dev
->type
;
1849 dev_set_mac_address(slave_dev
, &addr
);
1851 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1852 IFF_SLAVE_INACTIVE
);
1856 /* re-acquire the lock before getting the next slave */
1857 write_lock_bh(&bond
->lock
);
1860 /* zero the mac address of the master so it will be
1861 * set by the application to the mac address of the
1864 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1866 if (list_empty(&bond
->vlan_list
)) {
1867 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1869 printk(KERN_WARNING DRV_NAME
1870 ": %s: Warning: clearing HW address of %s while it "
1871 "still has VLANs.\n",
1872 bond_dev
->name
, bond_dev
->name
);
1873 printk(KERN_WARNING DRV_NAME
1874 ": %s: When re-adding slaves, make sure the bond's "
1875 "HW address matches its VLANs'.\n",
1879 printk(KERN_INFO DRV_NAME
1880 ": %s: released all slaves\n",
1884 write_unlock_bh(&bond
->lock
);
1890 * This function changes the active slave to slave <slave_dev>.
1891 * It returns -EINVAL in the following cases.
1892 * - <slave_dev> is not found in the list.
1893 * - There is not active slave now.
1894 * - <slave_dev> is already active.
1895 * - The link state of <slave_dev> is not BOND_LINK_UP.
1896 * - <slave_dev> is not running.
1897 * In these cases, this fuction does nothing.
1898 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1900 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1902 struct bonding
*bond
= bond_dev
->priv
;
1903 struct slave
*old_active
= NULL
;
1904 struct slave
*new_active
= NULL
;
1907 if (!USES_PRIMARY(bond
->params
.mode
)) {
1911 /* Verify that master_dev is indeed the master of slave_dev */
1912 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1913 (slave_dev
->master
!= bond_dev
)) {
1917 write_lock_bh(&bond
->lock
);
1919 old_active
= bond
->curr_active_slave
;
1920 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1923 * Changing to the current active: do nothing; return success.
1925 if (new_active
&& (new_active
== old_active
)) {
1926 write_unlock_bh(&bond
->lock
);
1932 (new_active
->link
== BOND_LINK_UP
) &&
1933 IS_UP(new_active
->dev
)) {
1934 bond_change_active_slave(bond
, new_active
);
1939 write_unlock_bh(&bond
->lock
);
1944 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1946 struct bonding
*bond
= bond_dev
->priv
;
1948 info
->bond_mode
= bond
->params
.mode
;
1949 info
->miimon
= bond
->params
.miimon
;
1951 read_lock_bh(&bond
->lock
);
1952 info
->num_slaves
= bond
->slave_cnt
;
1953 read_unlock_bh(&bond
->lock
);
1958 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1960 struct bonding
*bond
= bond_dev
->priv
;
1961 struct slave
*slave
;
1964 if (info
->slave_id
< 0) {
1968 read_lock_bh(&bond
->lock
);
1970 bond_for_each_slave(bond
, slave
, i
) {
1971 if (i
== (int)info
->slave_id
) {
1977 read_unlock_bh(&bond
->lock
);
1980 strcpy(info
->slave_name
, slave
->dev
->name
);
1981 info
->link
= slave
->link
;
1982 info
->state
= slave
->state
;
1983 info
->link_failure_count
= slave
->link_failure_count
;
1991 /*-------------------------------- Monitoring -------------------------------*/
1993 /* this function is called regularly to monitor each slave's link. */
1994 void bond_mii_monitor(struct net_device
*bond_dev
)
1996 struct bonding
*bond
= bond_dev
->priv
;
1997 struct slave
*slave
, *oldcurrent
;
1998 int do_failover
= 0;
2002 read_lock(&bond
->lock
);
2004 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2006 if (bond
->kill_timers
) {
2010 if (bond
->slave_cnt
== 0) {
2014 /* we will try to read the link status of each of our slaves, and
2015 * set their IFF_RUNNING flag appropriately. For each slave not
2016 * supporting MII status, we won't do anything so that a user-space
2017 * program could monitor the link itself if needed.
2020 read_lock(&bond
->curr_slave_lock
);
2021 oldcurrent
= bond
->curr_active_slave
;
2022 read_unlock(&bond
->curr_slave_lock
);
2024 bond_for_each_slave(bond
, slave
, i
) {
2025 struct net_device
*slave_dev
= slave
->dev
;
2027 u16 old_speed
= slave
->speed
;
2028 u8 old_duplex
= slave
->duplex
;
2030 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2032 switch (slave
->link
) {
2033 case BOND_LINK_UP
: /* the link was up */
2034 if (link_state
== BMSR_LSTATUS
) {
2035 /* link stays up, nothing more to do */
2037 } else { /* link going down */
2038 slave
->link
= BOND_LINK_FAIL
;
2039 slave
->delay
= bond
->params
.downdelay
;
2041 if (slave
->link_failure_count
< UINT_MAX
) {
2042 slave
->link_failure_count
++;
2045 if (bond
->params
.downdelay
) {
2046 printk(KERN_INFO DRV_NAME
2047 ": %s: link status down for %s "
2048 "interface %s, disabling it in "
2052 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2053 ? ((slave
== oldcurrent
)
2054 ? "active " : "backup ")
2058 bond
->params
.downdelay
* bond
->params
.miimon
);
2061 /* no break ! fall through the BOND_LINK_FAIL test to
2062 ensure proper action to be taken
2064 case BOND_LINK_FAIL
: /* the link has just gone down */
2065 if (link_state
!= BMSR_LSTATUS
) {
2066 /* link stays down */
2067 if (slave
->delay
<= 0) {
2068 /* link down for too long time */
2069 slave
->link
= BOND_LINK_DOWN
;
2071 /* in active/backup mode, we must
2072 * completely disable this interface
2074 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2075 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2076 bond_set_slave_inactive_flags(slave
);
2079 printk(KERN_INFO DRV_NAME
2080 ": %s: link status definitely "
2081 "down for interface %s, "
2086 /* notify ad that the link status has changed */
2087 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2088 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2091 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2092 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2093 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2096 if (slave
== oldcurrent
) {
2104 slave
->link
= BOND_LINK_UP
;
2105 slave
->jiffies
= jiffies
;
2106 printk(KERN_INFO DRV_NAME
2107 ": %s: link status up again after %d "
2108 "ms for interface %s.\n",
2110 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2114 case BOND_LINK_DOWN
: /* the link was down */
2115 if (link_state
!= BMSR_LSTATUS
) {
2116 /* the link stays down, nothing more to do */
2118 } else { /* link going up */
2119 slave
->link
= BOND_LINK_BACK
;
2120 slave
->delay
= bond
->params
.updelay
;
2122 if (bond
->params
.updelay
) {
2123 /* if updelay == 0, no need to
2124 advertise about a 0 ms delay */
2125 printk(KERN_INFO DRV_NAME
2126 ": %s: link status up for "
2127 "interface %s, enabling it "
2131 bond
->params
.updelay
* bond
->params
.miimon
);
2134 /* no break ! fall through the BOND_LINK_BACK state in
2135 case there's something to do.
2137 case BOND_LINK_BACK
: /* the link has just come back */
2138 if (link_state
!= BMSR_LSTATUS
) {
2139 /* link down again */
2140 slave
->link
= BOND_LINK_DOWN
;
2142 printk(KERN_INFO DRV_NAME
2143 ": %s: link status down again after %d "
2144 "ms for interface %s.\n",
2146 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2150 if (slave
->delay
== 0) {
2151 /* now the link has been up for long time enough */
2152 slave
->link
= BOND_LINK_UP
;
2153 slave
->jiffies
= jiffies
;
2155 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2156 /* prevent it from being the active one */
2157 slave
->state
= BOND_STATE_BACKUP
;
2158 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2159 /* make it immediately active */
2160 slave
->state
= BOND_STATE_ACTIVE
;
2161 } else if (slave
!= bond
->primary_slave
) {
2162 /* prevent it from being the active one */
2163 slave
->state
= BOND_STATE_BACKUP
;
2166 printk(KERN_INFO DRV_NAME
2167 ": %s: link status definitely "
2168 "up for interface %s.\n",
2172 /* notify ad that the link status has changed */
2173 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2174 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2177 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2178 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2179 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2182 if ((!oldcurrent
) ||
2183 (slave
== bond
->primary_slave
)) {
2192 /* Should not happen */
2193 printk(KERN_ERR DRV_NAME
2194 ": %s: Error: %s Illegal value (link=%d)\n",
2199 } /* end of switch (slave->link) */
2201 bond_update_speed_duplex(slave
);
2203 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2204 if (old_speed
!= slave
->speed
) {
2205 bond_3ad_adapter_speed_changed(slave
);
2208 if (old_duplex
!= slave
->duplex
) {
2209 bond_3ad_adapter_duplex_changed(slave
);
2216 write_lock(&bond
->curr_slave_lock
);
2218 bond_select_active_slave(bond
);
2220 write_unlock(&bond
->curr_slave_lock
);
2222 bond_set_carrier(bond
);
2225 if (bond
->params
.miimon
) {
2226 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2229 read_unlock(&bond
->lock
);
2233 static u32
bond_glean_dev_ip(struct net_device
*dev
)
2235 struct in_device
*idev
;
2236 struct in_ifaddr
*ifa
;
2243 idev
= __in_dev_get_rcu(dev
);
2247 ifa
= idev
->ifa_list
;
2251 addr
= ifa
->ifa_local
;
2257 static int bond_has_ip(struct bonding
*bond
)
2259 struct vlan_entry
*vlan
, *vlan_next
;
2261 if (bond
->master_ip
)
2264 if (list_empty(&bond
->vlan_list
))
2267 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2276 static int bond_has_this_ip(struct bonding
*bond
, u32 ip
)
2278 struct vlan_entry
*vlan
, *vlan_next
;
2280 if (ip
== bond
->master_ip
)
2283 if (list_empty(&bond
->vlan_list
))
2286 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2288 if (ip
== vlan
->vlan_ip
)
2296 * We go to the (large) trouble of VLAN tagging ARP frames because
2297 * switches in VLAN mode (especially if ports are configured as
2298 * "native" to a VLAN) might not pass non-tagged frames.
2300 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, u32 dest_ip
, u32 src_ip
, unsigned short vlan_id
)
2302 struct sk_buff
*skb
;
2304 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2305 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2307 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2308 NULL
, slave_dev
->dev_addr
, NULL
);
2311 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2315 skb
= vlan_put_tag(skb
, vlan_id
);
2317 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2325 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2328 u32
*targets
= bond
->params
.arp_targets
;
2329 struct vlan_entry
*vlan
, *vlan_next
;
2330 struct net_device
*vlan_dev
;
2334 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2337 dprintk("basa: target %x\n", targets
[i
]);
2338 if (list_empty(&bond
->vlan_list
)) {
2339 dprintk("basa: empty vlan: arp_send\n");
2340 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2341 bond
->master_ip
, 0);
2346 * If VLANs are configured, we do a route lookup to
2347 * determine which VLAN interface would be used, so we
2348 * can tag the ARP with the proper VLAN tag.
2350 memset(&fl
, 0, sizeof(fl
));
2351 fl
.fl4_dst
= targets
[i
];
2352 fl
.fl4_tos
= RTO_ONLINK
;
2354 rv
= ip_route_output_key(&rt
, &fl
);
2356 if (net_ratelimit()) {
2357 printk(KERN_WARNING DRV_NAME
2358 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2359 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2365 * This target is not on a VLAN
2367 if (rt
->u
.dst
.dev
== bond
->dev
) {
2369 dprintk("basa: rtdev == bond->dev: arp_send\n");
2370 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2371 bond
->master_ip
, 0);
2376 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2378 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2379 if (vlan_dev
== rt
->u
.dst
.dev
) {
2380 vlan_id
= vlan
->vlan_id
;
2381 dprintk("basa: vlan match on %s %d\n",
2382 vlan_dev
->name
, vlan_id
);
2389 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2390 vlan
->vlan_ip
, vlan_id
);
2394 if (net_ratelimit()) {
2395 printk(KERN_WARNING DRV_NAME
2396 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2397 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2398 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2405 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2406 * for each VLAN above us.
2408 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2410 struct slave
*slave
= bond
->curr_active_slave
;
2411 struct vlan_entry
*vlan
;
2412 struct net_device
*vlan_dev
;
2414 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2415 slave
? slave
->dev
->name
: "NULL");
2419 if (bond
->master_ip
) {
2420 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2421 bond
->master_ip
, 0);
2424 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2425 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2426 if (vlan
->vlan_ip
) {
2427 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2428 vlan
->vlan_ip
, vlan
->vlan_id
);
2433 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, u32 sip
, u32 tip
)
2436 u32
*targets
= bond
->params
.arp_targets
;
2438 targets
= bond
->params
.arp_targets
;
2439 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2440 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2441 "%u.%u.%u.%u bhti(tip) %d\n",
2442 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2443 bond_has_this_ip(bond
, tip
));
2444 if (sip
== targets
[i
]) {
2445 if (bond_has_this_ip(bond
, tip
))
2446 slave
->last_arp_rx
= jiffies
;
2452 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2455 struct slave
*slave
;
2456 struct bonding
*bond
;
2457 unsigned char *arp_ptr
;
2460 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2464 read_lock(&bond
->lock
);
2466 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2467 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2468 orig_dev
? orig_dev
->name
: "NULL");
2470 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2471 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2474 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2475 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2476 (2 * dev
->addr_len
) +
2477 (2 * sizeof(u32
)))))
2481 if (arp
->ar_hln
!= dev
->addr_len
||
2482 skb
->pkt_type
== PACKET_OTHERHOST
||
2483 skb
->pkt_type
== PACKET_LOOPBACK
||
2484 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2485 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2489 arp_ptr
= (unsigned char *)(arp
+ 1);
2490 arp_ptr
+= dev
->addr_len
;
2491 memcpy(&sip
, arp_ptr
, 4);
2492 arp_ptr
+= 4 + dev
->addr_len
;
2493 memcpy(&tip
, arp_ptr
, 4);
2495 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2496 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2497 slave
->state
, bond
->params
.arp_validate
,
2498 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2501 * Backup slaves won't see the ARP reply, but do come through
2502 * here for each ARP probe (so we swap the sip/tip to validate
2503 * the probe). In a "redundant switch, common router" type of
2504 * configuration, the ARP probe will (hopefully) travel from
2505 * the active, through one switch, the router, then the other
2506 * switch before reaching the backup.
2508 if (slave
->state
== BOND_STATE_ACTIVE
)
2509 bond_validate_arp(bond
, slave
, sip
, tip
);
2511 bond_validate_arp(bond
, slave
, tip
, sip
);
2514 read_unlock(&bond
->lock
);
2517 return NET_RX_SUCCESS
;
2521 * this function is called regularly to monitor each slave's link
2522 * ensuring that traffic is being sent and received when arp monitoring
2523 * is used in load-balancing mode. if the adapter has been dormant, then an
2524 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2525 * arp monitoring in active backup mode.
2527 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2529 struct bonding
*bond
= bond_dev
->priv
;
2530 struct slave
*slave
, *oldcurrent
;
2531 int do_failover
= 0;
2535 read_lock(&bond
->lock
);
2537 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2539 if (bond
->kill_timers
) {
2543 if (bond
->slave_cnt
== 0) {
2547 read_lock(&bond
->curr_slave_lock
);
2548 oldcurrent
= bond
->curr_active_slave
;
2549 read_unlock(&bond
->curr_slave_lock
);
2551 /* see if any of the previous devices are up now (i.e. they have
2552 * xmt and rcv traffic). the curr_active_slave does not come into
2553 * the picture unless it is null. also, slave->jiffies is not needed
2554 * here because we send an arp on each slave and give a slave as
2555 * long as it needs to get the tx/rx within the delta.
2556 * TODO: what about up/down delay in arp mode? it wasn't here before
2559 bond_for_each_slave(bond
, slave
, i
) {
2560 if (slave
->link
!= BOND_LINK_UP
) {
2561 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2562 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2564 slave
->link
= BOND_LINK_UP
;
2565 slave
->state
= BOND_STATE_ACTIVE
;
2567 /* primary_slave has no meaning in round-robin
2568 * mode. the window of a slave being up and
2569 * curr_active_slave being null after enslaving
2573 printk(KERN_INFO DRV_NAME
2574 ": %s: link status definitely "
2575 "up for interface %s, ",
2580 printk(KERN_INFO DRV_NAME
2581 ": %s: interface %s is now up\n",
2587 /* slave->link == BOND_LINK_UP */
2589 /* not all switches will respond to an arp request
2590 * when the source ip is 0, so don't take the link down
2591 * if we don't know our ip yet
2593 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2594 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2595 bond_has_ip(bond
))) {
2597 slave
->link
= BOND_LINK_DOWN
;
2598 slave
->state
= BOND_STATE_BACKUP
;
2600 if (slave
->link_failure_count
< UINT_MAX
) {
2601 slave
->link_failure_count
++;
2604 printk(KERN_INFO DRV_NAME
2605 ": %s: interface %s is now down.\n",
2609 if (slave
== oldcurrent
) {
2615 /* note: if switch is in round-robin mode, all links
2616 * must tx arp to ensure all links rx an arp - otherwise
2617 * links may oscillate or not come up at all; if switch is
2618 * in something like xor mode, there is nothing we can
2619 * do - all replies will be rx'ed on same link causing slaves
2620 * to be unstable during low/no traffic periods
2622 if (IS_UP(slave
->dev
)) {
2623 bond_arp_send_all(bond
, slave
);
2628 write_lock(&bond
->curr_slave_lock
);
2630 bond_select_active_slave(bond
);
2632 write_unlock(&bond
->curr_slave_lock
);
2636 if (bond
->params
.arp_interval
) {
2637 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2640 read_unlock(&bond
->lock
);
2644 * When using arp monitoring in active-backup mode, this function is
2645 * called to determine if any backup slaves have went down or a new
2646 * current slave needs to be found.
2647 * The backup slaves never generate traffic, they are considered up by merely
2648 * receiving traffic. If the current slave goes down, each backup slave will
2649 * be given the opportunity to tx/rx an arp before being taken down - this
2650 * prevents all slaves from being taken down due to the current slave not
2651 * sending any traffic for the backups to receive. The arps are not necessarily
2652 * necessary, any tx and rx traffic will keep the current slave up. While any
2653 * rx traffic will keep the backup slaves up, the current slave is responsible
2654 * for generating traffic to keep them up regardless of any other traffic they
2655 * may have received.
2656 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2658 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2660 struct bonding
*bond
= bond_dev
->priv
;
2661 struct slave
*slave
;
2665 read_lock(&bond
->lock
);
2667 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2669 if (bond
->kill_timers
) {
2673 if (bond
->slave_cnt
== 0) {
2677 /* determine if any slave has come up or any backup slave has
2679 * TODO: what about up/down delay in arp mode? it wasn't here before
2682 bond_for_each_slave(bond
, slave
, i
) {
2683 if (slave
->link
!= BOND_LINK_UP
) {
2684 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2687 slave
->link
= BOND_LINK_UP
;
2689 write_lock(&bond
->curr_slave_lock
);
2691 if ((!bond
->curr_active_slave
) &&
2692 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2693 bond_change_active_slave(bond
, slave
);
2694 bond
->current_arp_slave
= NULL
;
2695 } else if (bond
->curr_active_slave
!= slave
) {
2696 /* this slave has just come up but we
2697 * already have a current slave; this
2698 * can also happen if bond_enslave adds
2699 * a new slave that is up while we are
2700 * searching for a new slave
2702 bond_set_slave_inactive_flags(slave
);
2703 bond
->current_arp_slave
= NULL
;
2706 bond_set_carrier(bond
);
2708 if (slave
== bond
->curr_active_slave
) {
2709 printk(KERN_INFO DRV_NAME
2710 ": %s: %s is up and now the "
2711 "active interface\n",
2714 netif_carrier_on(bond
->dev
);
2716 printk(KERN_INFO DRV_NAME
2717 ": %s: backup interface %s is "
2723 write_unlock(&bond
->curr_slave_lock
);
2726 read_lock(&bond
->curr_slave_lock
);
2728 if ((slave
!= bond
->curr_active_slave
) &&
2729 (!bond
->current_arp_slave
) &&
2730 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2731 bond_has_ip(bond
))) {
2732 /* a backup slave has gone down; three times
2733 * the delta allows the current slave to be
2734 * taken out before the backup slave.
2735 * note: a non-null current_arp_slave indicates
2736 * the curr_active_slave went down and we are
2737 * searching for a new one; under this
2738 * condition we only take the curr_active_slave
2739 * down - this gives each slave a chance to
2740 * tx/rx traffic before being taken out
2743 read_unlock(&bond
->curr_slave_lock
);
2745 slave
->link
= BOND_LINK_DOWN
;
2747 if (slave
->link_failure_count
< UINT_MAX
) {
2748 slave
->link_failure_count
++;
2751 bond_set_slave_inactive_flags(slave
);
2753 printk(KERN_INFO DRV_NAME
2754 ": %s: backup interface %s is now down\n",
2758 read_unlock(&bond
->curr_slave_lock
);
2763 read_lock(&bond
->curr_slave_lock
);
2764 slave
= bond
->curr_active_slave
;
2765 read_unlock(&bond
->curr_slave_lock
);
2768 /* if we have sent traffic in the past 2*arp_intervals but
2769 * haven't xmit and rx traffic in that time interval, select
2770 * a different slave. slave->jiffies is only updated when
2771 * a slave first becomes the curr_active_slave - not necessarily
2772 * after every arp; this ensures the slave has a full 2*delta
2773 * before being taken out. if a primary is being used, check
2774 * if it is up and needs to take over as the curr_active_slave
2776 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2777 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2778 bond_has_ip(bond
))) &&
2779 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2781 slave
->link
= BOND_LINK_DOWN
;
2783 if (slave
->link_failure_count
< UINT_MAX
) {
2784 slave
->link_failure_count
++;
2787 printk(KERN_INFO DRV_NAME
2788 ": %s: link status down for active interface "
2789 "%s, disabling it\n",
2793 write_lock(&bond
->curr_slave_lock
);
2795 bond_select_active_slave(bond
);
2796 slave
= bond
->curr_active_slave
;
2798 write_unlock(&bond
->curr_slave_lock
);
2800 bond
->current_arp_slave
= slave
;
2803 slave
->jiffies
= jiffies
;
2805 } else if ((bond
->primary_slave
) &&
2806 (bond
->primary_slave
!= slave
) &&
2807 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2808 /* at this point, slave is the curr_active_slave */
2809 printk(KERN_INFO DRV_NAME
2810 ": %s: changing from interface %s to primary "
2814 bond
->primary_slave
->dev
->name
);
2816 /* primary is up so switch to it */
2817 write_lock(&bond
->curr_slave_lock
);
2818 bond_change_active_slave(bond
, bond
->primary_slave
);
2819 write_unlock(&bond
->curr_slave_lock
);
2821 slave
= bond
->primary_slave
;
2822 slave
->jiffies
= jiffies
;
2824 bond
->current_arp_slave
= NULL
;
2827 /* the current slave must tx an arp to ensure backup slaves
2830 if (slave
&& bond_has_ip(bond
)) {
2831 bond_arp_send_all(bond
, slave
);
2835 /* if we don't have a curr_active_slave, search for the next available
2836 * backup slave from the current_arp_slave and make it the candidate
2837 * for becoming the curr_active_slave
2840 if (!bond
->current_arp_slave
) {
2841 bond
->current_arp_slave
= bond
->first_slave
;
2844 if (bond
->current_arp_slave
) {
2845 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2847 /* search for next candidate */
2848 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2849 if (IS_UP(slave
->dev
)) {
2850 slave
->link
= BOND_LINK_BACK
;
2851 bond_set_slave_active_flags(slave
);
2852 bond_arp_send_all(bond
, slave
);
2853 slave
->jiffies
= jiffies
;
2854 bond
->current_arp_slave
= slave
;
2858 /* if the link state is up at this point, we
2859 * mark it down - this can happen if we have
2860 * simultaneous link failures and
2861 * reselect_active_interface doesn't make this
2862 * one the current slave so it is still marked
2863 * up when it is actually down
2865 if (slave
->link
== BOND_LINK_UP
) {
2866 slave
->link
= BOND_LINK_DOWN
;
2867 if (slave
->link_failure_count
< UINT_MAX
) {
2868 slave
->link_failure_count
++;
2871 bond_set_slave_inactive_flags(slave
);
2873 printk(KERN_INFO DRV_NAME
2874 ": %s: backup interface %s is "
2884 if (bond
->params
.arp_interval
) {
2885 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2888 read_unlock(&bond
->lock
);
2891 /*------------------------------ proc/seq_file-------------------------------*/
2893 #ifdef CONFIG_PROC_FS
2895 #define SEQ_START_TOKEN ((void *)1)
2897 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2899 struct bonding
*bond
= seq
->private;
2901 struct slave
*slave
;
2904 /* make sure the bond won't be taken away */
2905 read_lock(&dev_base_lock
);
2906 read_lock_bh(&bond
->lock
);
2909 return SEQ_START_TOKEN
;
2912 bond_for_each_slave(bond
, slave
, i
) {
2913 if (++off
== *pos
) {
2921 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2923 struct bonding
*bond
= seq
->private;
2924 struct slave
*slave
= v
;
2927 if (v
== SEQ_START_TOKEN
) {
2928 return bond
->first_slave
;
2931 slave
= slave
->next
;
2933 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2936 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2938 struct bonding
*bond
= seq
->private;
2940 read_unlock_bh(&bond
->lock
);
2941 read_unlock(&dev_base_lock
);
2944 static void bond_info_show_master(struct seq_file
*seq
)
2946 struct bonding
*bond
= seq
->private;
2951 read_lock(&bond
->curr_slave_lock
);
2952 curr
= bond
->curr_active_slave
;
2953 read_unlock(&bond
->curr_slave_lock
);
2955 seq_printf(seq
, "Bonding Mode: %s\n",
2956 bond_mode_name(bond
->params
.mode
));
2958 if (bond
->params
.mode
== BOND_MODE_XOR
||
2959 bond
->params
.mode
== BOND_MODE_8023AD
) {
2960 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2961 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2962 bond
->params
.xmit_policy
);
2965 if (USES_PRIMARY(bond
->params
.mode
)) {
2966 seq_printf(seq
, "Primary Slave: %s\n",
2967 (bond
->primary_slave
) ?
2968 bond
->primary_slave
->dev
->name
: "None");
2970 seq_printf(seq
, "Currently Active Slave: %s\n",
2971 (curr
) ? curr
->dev
->name
: "None");
2974 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
2976 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
2977 seq_printf(seq
, "Up Delay (ms): %d\n",
2978 bond
->params
.updelay
* bond
->params
.miimon
);
2979 seq_printf(seq
, "Down Delay (ms): %d\n",
2980 bond
->params
.downdelay
* bond
->params
.miimon
);
2983 /* ARP information */
2984 if(bond
->params
.arp_interval
> 0) {
2986 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
2987 bond
->params
.arp_interval
);
2989 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
2991 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
2992 if (!bond
->params
.arp_targets
[i
])
2995 seq_printf(seq
, ",");
2996 target
= ntohl(bond
->params
.arp_targets
[i
]);
2997 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3000 seq_printf(seq
, "\n");
3003 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3004 struct ad_info ad_info
;
3006 seq_puts(seq
, "\n802.3ad info\n");
3007 seq_printf(seq
, "LACP rate: %s\n",
3008 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3010 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3011 seq_printf(seq
, "bond %s has no active aggregator\n",
3014 seq_printf(seq
, "Active Aggregator Info:\n");
3016 seq_printf(seq
, "\tAggregator ID: %d\n",
3017 ad_info
.aggregator_id
);
3018 seq_printf(seq
, "\tNumber of ports: %d\n",
3020 seq_printf(seq
, "\tActor Key: %d\n",
3022 seq_printf(seq
, "\tPartner Key: %d\n",
3023 ad_info
.partner_key
);
3024 seq_printf(seq
, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
3025 ad_info
.partner_system
[0],
3026 ad_info
.partner_system
[1],
3027 ad_info
.partner_system
[2],
3028 ad_info
.partner_system
[3],
3029 ad_info
.partner_system
[4],
3030 ad_info
.partner_system
[5]);
3035 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3037 struct bonding
*bond
= seq
->private;
3039 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3040 seq_printf(seq
, "MII Status: %s\n",
3041 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3042 seq_printf(seq
, "Link Failure Count: %u\n",
3043 slave
->link_failure_count
);
3046 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
3047 slave
->perm_hwaddr
[0], slave
->perm_hwaddr
[1],
3048 slave
->perm_hwaddr
[2], slave
->perm_hwaddr
[3],
3049 slave
->perm_hwaddr
[4], slave
->perm_hwaddr
[5]);
3051 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3052 const struct aggregator
*agg
3053 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3056 seq_printf(seq
, "Aggregator ID: %d\n",
3057 agg
->aggregator_identifier
);
3059 seq_puts(seq
, "Aggregator ID: N/A\n");
3064 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3066 if (v
== SEQ_START_TOKEN
) {
3067 seq_printf(seq
, "%s\n", version
);
3068 bond_info_show_master(seq
);
3070 bond_info_show_slave(seq
, v
);
3076 static struct seq_operations bond_info_seq_ops
= {
3077 .start
= bond_info_seq_start
,
3078 .next
= bond_info_seq_next
,
3079 .stop
= bond_info_seq_stop
,
3080 .show
= bond_info_seq_show
,
3083 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3085 struct seq_file
*seq
;
3086 struct proc_dir_entry
*proc
;
3089 res
= seq_open(file
, &bond_info_seq_ops
);
3091 /* recover the pointer buried in proc_dir_entry data */
3092 seq
= file
->private_data
;
3094 seq
->private = proc
->data
;
3100 static const struct file_operations bond_info_fops
= {
3101 .owner
= THIS_MODULE
,
3102 .open
= bond_info_open
,
3104 .llseek
= seq_lseek
,
3105 .release
= seq_release
,
3108 static int bond_create_proc_entry(struct bonding
*bond
)
3110 struct net_device
*bond_dev
= bond
->dev
;
3112 if (bond_proc_dir
) {
3113 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3116 if (bond
->proc_entry
== NULL
) {
3117 printk(KERN_WARNING DRV_NAME
3118 ": Warning: Cannot create /proc/net/%s/%s\n",
3119 DRV_NAME
, bond_dev
->name
);
3121 bond
->proc_entry
->data
= bond
;
3122 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3123 bond
->proc_entry
->owner
= THIS_MODULE
;
3124 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3131 static void bond_remove_proc_entry(struct bonding
*bond
)
3133 if (bond_proc_dir
&& bond
->proc_entry
) {
3134 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3135 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3136 bond
->proc_entry
= NULL
;
3140 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3141 * Caller must hold rtnl_lock.
3143 static void bond_create_proc_dir(void)
3145 int len
= strlen(DRV_NAME
);
3147 for (bond_proc_dir
= proc_net
->subdir
; bond_proc_dir
;
3148 bond_proc_dir
= bond_proc_dir
->next
) {
3149 if ((bond_proc_dir
->namelen
== len
) &&
3150 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3155 if (!bond_proc_dir
) {
3156 bond_proc_dir
= proc_mkdir(DRV_NAME
, proc_net
);
3157 if (bond_proc_dir
) {
3158 bond_proc_dir
->owner
= THIS_MODULE
;
3160 printk(KERN_WARNING DRV_NAME
3161 ": Warning: cannot create /proc/net/%s\n",
3167 /* Destroy the bonding directory under /proc/net, if empty.
3168 * Caller must hold rtnl_lock.
3170 static void bond_destroy_proc_dir(void)
3172 struct proc_dir_entry
*de
;
3174 if (!bond_proc_dir
) {
3178 /* verify that the /proc dir is empty */
3179 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3180 /* ignore . and .. */
3181 if (*(de
->name
) != '.') {
3187 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3188 bond_proc_dir
->owner
= NULL
;
3191 remove_proc_entry(DRV_NAME
, proc_net
);
3192 bond_proc_dir
= NULL
;
3195 #endif /* CONFIG_PROC_FS */
3197 /*-------------------------- netdev event handling --------------------------*/
3200 * Change device name
3202 static int bond_event_changename(struct bonding
*bond
)
3204 #ifdef CONFIG_PROC_FS
3205 bond_remove_proc_entry(bond
);
3206 bond_create_proc_entry(bond
);
3208 down_write(&(bonding_rwsem
));
3209 bond_destroy_sysfs_entry(bond
);
3210 bond_create_sysfs_entry(bond
);
3211 up_write(&(bonding_rwsem
));
3215 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3217 struct bonding
*event_bond
= bond_dev
->priv
;
3220 case NETDEV_CHANGENAME
:
3221 return bond_event_changename(event_bond
);
3222 case NETDEV_UNREGISTER
:
3224 * TODO: remove a bond from the list?
3234 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3236 struct net_device
*bond_dev
= slave_dev
->master
;
3237 struct bonding
*bond
= bond_dev
->priv
;
3240 case NETDEV_UNREGISTER
:
3242 bond_release(bond_dev
, slave_dev
);
3247 * TODO: is this what we get if somebody
3248 * sets up a hierarchical bond, then rmmod's
3249 * one of the slave bonding devices?
3254 * ... Or is it this?
3257 case NETDEV_CHANGEMTU
:
3259 * TODO: Should slaves be allowed to
3260 * independently alter their MTU? For
3261 * an active-backup bond, slaves need
3262 * not be the same type of device, so
3263 * MTUs may vary. For other modes,
3264 * slaves arguably should have the
3265 * same MTUs. To do this, we'd need to
3266 * take over the slave's change_mtu
3267 * function for the duration of their
3271 case NETDEV_CHANGENAME
:
3273 * TODO: handle changing the primary's name
3276 case NETDEV_FEAT_CHANGE
:
3277 bond_compute_features(bond
);
3287 * bond_netdev_event: handle netdev notifier chain events.
3289 * This function receives events for the netdev chain. The caller (an
3290 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3291 * locks for us to safely manipulate the slave devices (RTNL lock,
3294 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3296 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3298 dprintk("event_dev: %s, event: %lx\n",
3299 (event_dev
? event_dev
->name
: "None"),
3302 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3305 if (event_dev
->flags
& IFF_MASTER
) {
3306 dprintk("IFF_MASTER\n");
3307 return bond_master_netdev_event(event
, event_dev
);
3310 if (event_dev
->flags
& IFF_SLAVE
) {
3311 dprintk("IFF_SLAVE\n");
3312 return bond_slave_netdev_event(event
, event_dev
);
3319 * bond_inetaddr_event: handle inetaddr notifier chain events.
3321 * We keep track of device IPs primarily to use as source addresses in
3322 * ARP monitor probes (rather than spewing out broadcasts all the time).
3324 * We track one IP for the main device (if it has one), plus one per VLAN.
3326 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3328 struct in_ifaddr
*ifa
= ptr
;
3329 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3330 struct bonding
*bond
, *bond_next
;
3331 struct vlan_entry
*vlan
, *vlan_next
;
3333 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3334 if (bond
->dev
== event_dev
) {
3337 bond
->master_ip
= ifa
->ifa_local
;
3340 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3347 if (list_empty(&bond
->vlan_list
))
3350 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3352 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3353 if (vlan_dev
== event_dev
) {
3356 vlan
->vlan_ip
= ifa
->ifa_local
;
3360 bond_glean_dev_ip(vlan_dev
);
3371 static struct notifier_block bond_netdev_notifier
= {
3372 .notifier_call
= bond_netdev_event
,
3375 static struct notifier_block bond_inetaddr_notifier
= {
3376 .notifier_call
= bond_inetaddr_event
,
3379 /*-------------------------- Packet type handling ---------------------------*/
3381 /* register to receive lacpdus on a bond */
3382 static void bond_register_lacpdu(struct bonding
*bond
)
3384 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3386 /* initialize packet type */
3387 pk_type
->type
= PKT_TYPE_LACPDU
;
3388 pk_type
->dev
= bond
->dev
;
3389 pk_type
->func
= bond_3ad_lacpdu_recv
;
3391 dev_add_pack(pk_type
);
3394 /* unregister to receive lacpdus on a bond */
3395 static void bond_unregister_lacpdu(struct bonding
*bond
)
3397 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3400 void bond_register_arp(struct bonding
*bond
)
3402 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3407 pt
->type
= htons(ETH_P_ARP
);
3408 pt
->dev
= bond
->dev
;
3409 pt
->func
= bond_arp_rcv
;
3413 void bond_unregister_arp(struct bonding
*bond
)
3415 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3417 dev_remove_pack(pt
);
3421 /*---------------------------- Hashing Policies -----------------------------*/
3424 * Hash for the output device based upon layer 3 and layer 4 data. If
3425 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3426 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3428 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3429 struct net_device
*bond_dev
, int count
)
3431 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3432 struct iphdr
*iph
= ip_hdr(skb
);
3433 u16
*layer4hdr
= (u16
*)((u32
*)iph
+ iph
->ihl
);
3436 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3437 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3438 (iph
->protocol
== IPPROTO_TCP
||
3439 iph
->protocol
== IPPROTO_UDP
)) {
3440 layer4_xor
= htons((*layer4hdr
^ *(layer4hdr
+ 1)));
3442 return (layer4_xor
^
3443 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3447 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3451 * Hash for the output device based upon layer 2 data
3453 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3454 struct net_device
*bond_dev
, int count
)
3456 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3458 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3461 /*-------------------------- Device entry points ----------------------------*/
3463 static int bond_open(struct net_device
*bond_dev
)
3465 struct bonding
*bond
= bond_dev
->priv
;
3466 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3467 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3469 bond
->kill_timers
= 0;
3471 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3472 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3473 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3475 /* bond_alb_initialize must be called before the timer
3478 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3479 /* something went wrong - fail the open operation */
3483 init_timer(alb_timer
);
3484 alb_timer
->expires
= jiffies
+ 1;
3485 alb_timer
->data
= (unsigned long)bond
;
3486 alb_timer
->function
= (void *)&bond_alb_monitor
;
3487 add_timer(alb_timer
);
3490 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3491 init_timer(mii_timer
);
3492 mii_timer
->expires
= jiffies
+ 1;
3493 mii_timer
->data
= (unsigned long)bond_dev
;
3494 mii_timer
->function
= (void *)&bond_mii_monitor
;
3495 add_timer(mii_timer
);
3498 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3499 init_timer(arp_timer
);
3500 arp_timer
->expires
= jiffies
+ 1;
3501 arp_timer
->data
= (unsigned long)bond_dev
;
3502 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3503 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3505 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3507 if (bond
->params
.arp_validate
)
3508 bond_register_arp(bond
);
3510 add_timer(arp_timer
);
3513 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3514 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3515 init_timer(ad_timer
);
3516 ad_timer
->expires
= jiffies
+ 1;
3517 ad_timer
->data
= (unsigned long)bond
;
3518 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3519 add_timer(ad_timer
);
3521 /* register to receive LACPDUs */
3522 bond_register_lacpdu(bond
);
3528 static int bond_close(struct net_device
*bond_dev
)
3530 struct bonding
*bond
= bond_dev
->priv
;
3532 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3533 /* Unregister the receive of LACPDUs */
3534 bond_unregister_lacpdu(bond
);
3537 if (bond
->params
.arp_validate
)
3538 bond_unregister_arp(bond
);
3540 write_lock_bh(&bond
->lock
);
3543 /* signal timers not to re-arm */
3544 bond
->kill_timers
= 1;
3546 write_unlock_bh(&bond
->lock
);
3548 /* del_timer_sync must run without holding the bond->lock
3549 * because a running timer might be trying to hold it too
3552 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3553 del_timer_sync(&bond
->mii_timer
);
3556 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3557 del_timer_sync(&bond
->arp_timer
);
3560 switch (bond
->params
.mode
) {
3561 case BOND_MODE_8023AD
:
3562 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3566 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3573 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3574 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3575 /* Must be called only after all
3576 * slaves have been released
3578 bond_alb_deinitialize(bond
);
3584 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3586 struct bonding
*bond
= bond_dev
->priv
;
3587 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3588 struct slave
*slave
;
3591 memset(stats
, 0, sizeof(struct net_device_stats
));
3593 read_lock_bh(&bond
->lock
);
3595 bond_for_each_slave(bond
, slave
, i
) {
3596 sstats
= slave
->dev
->get_stats(slave
->dev
);
3597 stats
->rx_packets
+= sstats
->rx_packets
;
3598 stats
->rx_bytes
+= sstats
->rx_bytes
;
3599 stats
->rx_errors
+= sstats
->rx_errors
;
3600 stats
->rx_dropped
+= sstats
->rx_dropped
;
3602 stats
->tx_packets
+= sstats
->tx_packets
;
3603 stats
->tx_bytes
+= sstats
->tx_bytes
;
3604 stats
->tx_errors
+= sstats
->tx_errors
;
3605 stats
->tx_dropped
+= sstats
->tx_dropped
;
3607 stats
->multicast
+= sstats
->multicast
;
3608 stats
->collisions
+= sstats
->collisions
;
3610 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3611 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3612 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3613 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3614 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3615 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3617 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3618 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3619 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3620 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3621 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3624 read_unlock_bh(&bond
->lock
);
3629 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3631 struct net_device
*slave_dev
= NULL
;
3632 struct ifbond k_binfo
;
3633 struct ifbond __user
*u_binfo
= NULL
;
3634 struct ifslave k_sinfo
;
3635 struct ifslave __user
*u_sinfo
= NULL
;
3636 struct mii_ioctl_data
*mii
= NULL
;
3639 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3640 bond_dev
->name
, cmd
);
3652 * We do this again just in case we were called by SIOCGMIIREG
3653 * instead of SIOCGMIIPHY.
3660 if (mii
->reg_num
== 1) {
3661 struct bonding
*bond
= bond_dev
->priv
;
3663 read_lock_bh(&bond
->lock
);
3664 read_lock(&bond
->curr_slave_lock
);
3665 if (netif_carrier_ok(bond
->dev
)) {
3666 mii
->val_out
= BMSR_LSTATUS
;
3668 read_unlock(&bond
->curr_slave_lock
);
3669 read_unlock_bh(&bond
->lock
);
3673 case BOND_INFO_QUERY_OLD
:
3674 case SIOCBONDINFOQUERY
:
3675 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3677 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3681 res
= bond_info_query(bond_dev
, &k_binfo
);
3683 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3689 case BOND_SLAVE_INFO_QUERY_OLD
:
3690 case SIOCBONDSLAVEINFOQUERY
:
3691 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3693 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3697 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3699 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3710 if (!capable(CAP_NET_ADMIN
)) {
3714 down_write(&(bonding_rwsem
));
3715 slave_dev
= dev_get_by_name(ifr
->ifr_slave
);
3717 dprintk("slave_dev=%p: \n", slave_dev
);
3722 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3724 case BOND_ENSLAVE_OLD
:
3725 case SIOCBONDENSLAVE
:
3726 res
= bond_enslave(bond_dev
, slave_dev
);
3728 case BOND_RELEASE_OLD
:
3729 case SIOCBONDRELEASE
:
3730 res
= bond_release(bond_dev
, slave_dev
);
3732 case BOND_SETHWADDR_OLD
:
3733 case SIOCBONDSETHWADDR
:
3734 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3736 case BOND_CHANGE_ACTIVE_OLD
:
3737 case SIOCBONDCHANGEACTIVE
:
3738 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3747 up_write(&(bonding_rwsem
));
3751 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3753 struct bonding
*bond
= bond_dev
->priv
;
3754 struct dev_mc_list
*dmi
;
3756 write_lock_bh(&bond
->lock
);
3759 * Do promisc before checking multicast_mode
3761 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3762 bond_set_promiscuity(bond
, 1);
3765 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3766 bond_set_promiscuity(bond
, -1);
3769 /* set allmulti flag to slaves */
3770 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3771 bond_set_allmulti(bond
, 1);
3774 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3775 bond_set_allmulti(bond
, -1);
3778 bond
->flags
= bond_dev
->flags
;
3780 /* looking for addresses to add to slaves' mc list */
3781 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3782 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3783 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3787 /* looking for addresses to delete from slaves' list */
3788 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3789 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3790 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3794 /* save master's multicast list */
3795 bond_mc_list_destroy(bond
);
3796 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3798 write_unlock_bh(&bond
->lock
);
3802 * Change the MTU of all of a master's slaves to match the master
3804 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3806 struct bonding
*bond
= bond_dev
->priv
;
3807 struct slave
*slave
, *stop_at
;
3811 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3812 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3814 /* Can't hold bond->lock with bh disabled here since
3815 * some base drivers panic. On the other hand we can't
3816 * hold bond->lock without bh disabled because we'll
3817 * deadlock. The only solution is to rely on the fact
3818 * that we're under rtnl_lock here, and the slaves
3819 * list won't change. This doesn't solve the problem
3820 * of setting the slave's MTU while it is
3821 * transmitting, but the assumption is that the base
3822 * driver can handle that.
3824 * TODO: figure out a way to safely iterate the slaves
3825 * list, but without holding a lock around the actual
3826 * call to the base driver.
3829 bond_for_each_slave(bond
, slave
, i
) {
3830 dprintk("s %p s->p %p c_m %p\n", slave
,
3831 slave
->prev
, slave
->dev
->change_mtu
);
3833 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3836 /* If we failed to set the slave's mtu to the new value
3837 * we must abort the operation even in ACTIVE_BACKUP
3838 * mode, because if we allow the backup slaves to have
3839 * different mtu values than the active slave we'll
3840 * need to change their mtu when doing a failover. That
3841 * means changing their mtu from timer context, which
3842 * is probably not a good idea.
3844 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3849 bond_dev
->mtu
= new_mtu
;
3854 /* unwind from head to the slave that failed */
3856 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3859 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3861 dprintk("unwind err %d dev %s\n", tmp_res
,
3872 * Note that many devices must be down to change the HW address, and
3873 * downing the master releases all slaves. We can make bonds full of
3874 * bonding devices to test this, however.
3876 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3878 struct bonding
*bond
= bond_dev
->priv
;
3879 struct sockaddr
*sa
= addr
, tmp_sa
;
3880 struct slave
*slave
, *stop_at
;
3884 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3886 if (!is_valid_ether_addr(sa
->sa_data
)) {
3887 return -EADDRNOTAVAIL
;
3890 /* Can't hold bond->lock with bh disabled here since
3891 * some base drivers panic. On the other hand we can't
3892 * hold bond->lock without bh disabled because we'll
3893 * deadlock. The only solution is to rely on the fact
3894 * that we're under rtnl_lock here, and the slaves
3895 * list won't change. This doesn't solve the problem
3896 * of setting the slave's hw address while it is
3897 * transmitting, but the assumption is that the base
3898 * driver can handle that.
3900 * TODO: figure out a way to safely iterate the slaves
3901 * list, but without holding a lock around the actual
3902 * call to the base driver.
3905 bond_for_each_slave(bond
, slave
, i
) {
3906 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3908 if (slave
->dev
->set_mac_address
== NULL
) {
3910 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3914 res
= dev_set_mac_address(slave
->dev
, addr
);
3916 /* TODO: consider downing the slave
3918 * User should expect communications
3919 * breakage anyway until ARP finish
3922 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3928 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3932 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3933 tmp_sa
.sa_family
= bond_dev
->type
;
3935 /* unwind from head to the slave that failed */
3937 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3940 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3942 dprintk("unwind err %d dev %s\n", tmp_res
,
3950 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3952 struct bonding
*bond
= bond_dev
->priv
;
3953 struct slave
*slave
, *start_at
;
3957 read_lock(&bond
->lock
);
3959 if (!BOND_IS_OK(bond
)) {
3963 read_lock(&bond
->curr_slave_lock
);
3964 slave
= start_at
= bond
->curr_active_slave
;
3965 read_unlock(&bond
->curr_slave_lock
);
3971 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3972 if (IS_UP(slave
->dev
) &&
3973 (slave
->link
== BOND_LINK_UP
) &&
3974 (slave
->state
== BOND_STATE_ACTIVE
)) {
3975 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3977 write_lock(&bond
->curr_slave_lock
);
3978 bond
->curr_active_slave
= slave
->next
;
3979 write_unlock(&bond
->curr_slave_lock
);
3988 /* no suitable interface, frame not sent */
3991 read_unlock(&bond
->lock
);
3997 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3998 * the bond has a usable interface.
4000 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4002 struct bonding
*bond
= bond_dev
->priv
;
4005 read_lock(&bond
->lock
);
4006 read_lock(&bond
->curr_slave_lock
);
4008 if (!BOND_IS_OK(bond
)) {
4012 if (!bond
->curr_active_slave
)
4015 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4019 /* no suitable interface, frame not sent */
4022 read_unlock(&bond
->curr_slave_lock
);
4023 read_unlock(&bond
->lock
);
4028 * In bond_xmit_xor() , we determine the output device by using a pre-
4029 * determined xmit_hash_policy(), If the selected device is not enabled,
4030 * find the next active slave.
4032 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4034 struct bonding
*bond
= bond_dev
->priv
;
4035 struct slave
*slave
, *start_at
;
4040 read_lock(&bond
->lock
);
4042 if (!BOND_IS_OK(bond
)) {
4046 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4048 bond_for_each_slave(bond
, slave
, i
) {
4057 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4058 if (IS_UP(slave
->dev
) &&
4059 (slave
->link
== BOND_LINK_UP
) &&
4060 (slave
->state
== BOND_STATE_ACTIVE
)) {
4061 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4068 /* no suitable interface, frame not sent */
4071 read_unlock(&bond
->lock
);
4076 * in broadcast mode, we send everything to all usable interfaces.
4078 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4080 struct bonding
*bond
= bond_dev
->priv
;
4081 struct slave
*slave
, *start_at
;
4082 struct net_device
*tx_dev
= NULL
;
4086 read_lock(&bond
->lock
);
4088 if (!BOND_IS_OK(bond
)) {
4092 read_lock(&bond
->curr_slave_lock
);
4093 start_at
= bond
->curr_active_slave
;
4094 read_unlock(&bond
->curr_slave_lock
);
4100 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4101 if (IS_UP(slave
->dev
) &&
4102 (slave
->link
== BOND_LINK_UP
) &&
4103 (slave
->state
== BOND_STATE_ACTIVE
)) {
4105 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4107 printk(KERN_ERR DRV_NAME
4108 ": %s: Error: bond_xmit_broadcast(): "
4109 "skb_clone() failed\n",
4114 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4116 dev_kfree_skb(skb2
);
4120 tx_dev
= slave
->dev
;
4125 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4130 /* no suitable interface, frame not sent */
4133 /* frame sent to all suitable interfaces */
4134 read_unlock(&bond
->lock
);
4138 /*------------------------- Device initialization ---------------------------*/
4141 * set bond mode specific net device operations
4143 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4145 struct net_device
*bond_dev
= bond
->dev
;
4148 case BOND_MODE_ROUNDROBIN
:
4149 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4151 case BOND_MODE_ACTIVEBACKUP
:
4152 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4155 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4156 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4157 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4159 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4161 case BOND_MODE_BROADCAST
:
4162 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4164 case BOND_MODE_8023AD
:
4165 bond_set_master_3ad_flags(bond
);
4166 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4167 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4168 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4170 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4173 bond_set_master_alb_flags(bond
);
4176 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4177 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4180 /* Should never happen, mode already checked */
4181 printk(KERN_ERR DRV_NAME
4182 ": %s: Error: Unknown bonding mode %d\n",
4189 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4190 struct ethtool_drvinfo
*drvinfo
)
4192 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4193 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4194 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4197 static const struct ethtool_ops bond_ethtool_ops
= {
4198 .get_tx_csum
= ethtool_op_get_tx_csum
,
4199 .get_tso
= ethtool_op_get_tso
,
4200 .get_ufo
= ethtool_op_get_ufo
,
4201 .get_sg
= ethtool_op_get_sg
,
4202 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4206 * Does not allocate but creates a /proc entry.
4209 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4211 struct bonding
*bond
= bond_dev
->priv
;
4213 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4215 /* initialize rwlocks */
4216 rwlock_init(&bond
->lock
);
4217 rwlock_init(&bond
->curr_slave_lock
);
4219 bond
->params
= *params
; /* copy params struct */
4221 /* Initialize pointers */
4222 bond
->first_slave
= NULL
;
4223 bond
->curr_active_slave
= NULL
;
4224 bond
->current_arp_slave
= NULL
;
4225 bond
->primary_slave
= NULL
;
4226 bond
->dev
= bond_dev
;
4227 INIT_LIST_HEAD(&bond
->vlan_list
);
4229 /* Initialize the device entry points */
4230 bond_dev
->open
= bond_open
;
4231 bond_dev
->stop
= bond_close
;
4232 bond_dev
->get_stats
= bond_get_stats
;
4233 bond_dev
->do_ioctl
= bond_do_ioctl
;
4234 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4235 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4236 bond_dev
->change_mtu
= bond_change_mtu
;
4237 bond_dev
->set_mac_address
= bond_set_mac_address
;
4239 bond_set_mode_ops(bond
, bond
->params
.mode
);
4241 bond_dev
->destructor
= free_netdev
;
4243 /* Initialize the device options */
4244 bond_dev
->tx_queue_len
= 0;
4245 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4246 bond_dev
->priv_flags
|= IFF_BONDING
;
4248 /* At first, we block adding VLANs. That's the only way to
4249 * prevent problems that occur when adding VLANs over an
4250 * empty bond. The block will be removed once non-challenged
4251 * slaves are enslaved.
4253 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4255 /* don't acquire bond device's netif_tx_lock when
4257 bond_dev
->features
|= NETIF_F_LLTX
;
4259 /* By default, we declare the bond to be fully
4260 * VLAN hardware accelerated capable. Special
4261 * care is taken in the various xmit functions
4262 * when there are slaves that are not hw accel
4265 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4266 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4267 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4268 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4269 NETIF_F_HW_VLAN_RX
|
4270 NETIF_F_HW_VLAN_FILTER
);
4272 #ifdef CONFIG_PROC_FS
4273 bond_create_proc_entry(bond
);
4276 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4281 /* De-initialize device specific data.
4282 * Caller must hold rtnl_lock.
4284 void bond_deinit(struct net_device
*bond_dev
)
4286 struct bonding
*bond
= bond_dev
->priv
;
4288 list_del(&bond
->bond_list
);
4290 #ifdef CONFIG_PROC_FS
4291 bond_remove_proc_entry(bond
);
4295 /* Unregister and free all bond devices.
4296 * Caller must hold rtnl_lock.
4298 static void bond_free_all(void)
4300 struct bonding
*bond
, *nxt
;
4302 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4303 struct net_device
*bond_dev
= bond
->dev
;
4305 bond_mc_list_destroy(bond
);
4306 /* Release the bonded slaves */
4307 bond_release_all(bond_dev
);
4308 bond_deinit(bond_dev
);
4309 unregister_netdevice(bond_dev
);
4312 #ifdef CONFIG_PROC_FS
4313 bond_destroy_proc_dir();
4317 /*------------------------- Module initialization ---------------------------*/
4320 * Convert string input module parms. Accept either the
4321 * number of the mode or its string name.
4323 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4327 for (i
= 0; tbl
[i
].modename
; i
++) {
4328 if ((isdigit(*mode_arg
) &&
4329 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4330 (strncmp(mode_arg
, tbl
[i
].modename
,
4331 strlen(tbl
[i
].modename
)) == 0)) {
4339 static int bond_check_params(struct bond_params
*params
)
4341 int arp_validate_value
;
4344 * Convert string parameters.
4347 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4348 if (bond_mode
== -1) {
4349 printk(KERN_ERR DRV_NAME
4350 ": Error: Invalid bonding mode \"%s\"\n",
4351 mode
== NULL
? "NULL" : mode
);
4356 if (xmit_hash_policy
) {
4357 if ((bond_mode
!= BOND_MODE_XOR
) &&
4358 (bond_mode
!= BOND_MODE_8023AD
)) {
4359 printk(KERN_INFO DRV_NAME
4360 ": xor_mode param is irrelevant in mode %s\n",
4361 bond_mode_name(bond_mode
));
4363 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4365 if (xmit_hashtype
== -1) {
4366 printk(KERN_ERR DRV_NAME
4367 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4368 xmit_hash_policy
== NULL
? "NULL" :
4376 if (bond_mode
!= BOND_MODE_8023AD
) {
4377 printk(KERN_INFO DRV_NAME
4378 ": lacp_rate param is irrelevant in mode %s\n",
4379 bond_mode_name(bond_mode
));
4381 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4382 if (lacp_fast
== -1) {
4383 printk(KERN_ERR DRV_NAME
4384 ": Error: Invalid lacp rate \"%s\"\n",
4385 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4391 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4392 printk(KERN_WARNING DRV_NAME
4393 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4394 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4395 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4396 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4400 printk(KERN_WARNING DRV_NAME
4401 ": Warning: miimon module parameter (%d), "
4402 "not in range 0-%d, so it was reset to %d\n",
4403 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4404 miimon
= BOND_LINK_MON_INTERV
;
4408 printk(KERN_WARNING DRV_NAME
4409 ": Warning: updelay module parameter (%d), "
4410 "not in range 0-%d, so it was reset to 0\n",
4415 if (downdelay
< 0) {
4416 printk(KERN_WARNING DRV_NAME
4417 ": Warning: downdelay module parameter (%d), "
4418 "not in range 0-%d, so it was reset to 0\n",
4419 downdelay
, INT_MAX
);
4423 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4424 printk(KERN_WARNING DRV_NAME
4425 ": Warning: use_carrier module parameter (%d), "
4426 "not of valid value (0/1), so it was set to 1\n",
4431 /* reset values for 802.3ad */
4432 if (bond_mode
== BOND_MODE_8023AD
) {
4434 printk(KERN_WARNING DRV_NAME
4435 ": Warning: miimon must be specified, "
4436 "otherwise bonding will not detect link "
4437 "failure, speed and duplex which are "
4438 "essential for 802.3ad operation\n");
4439 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4444 /* reset values for TLB/ALB */
4445 if ((bond_mode
== BOND_MODE_TLB
) ||
4446 (bond_mode
== BOND_MODE_ALB
)) {
4448 printk(KERN_WARNING DRV_NAME
4449 ": Warning: miimon must be specified, "
4450 "otherwise bonding will not detect link "
4451 "failure and link speed which are essential "
4452 "for TLB/ALB load balancing\n");
4453 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4458 if (bond_mode
== BOND_MODE_ALB
) {
4459 printk(KERN_NOTICE DRV_NAME
4460 ": In ALB mode you might experience client "
4461 "disconnections upon reconnection of a link if the "
4462 "bonding module updelay parameter (%d msec) is "
4463 "incompatible with the forwarding delay time of the "
4469 if (updelay
|| downdelay
) {
4470 /* just warn the user the up/down delay will have
4471 * no effect since miimon is zero...
4473 printk(KERN_WARNING DRV_NAME
4474 ": Warning: miimon module parameter not set "
4475 "and updelay (%d) or downdelay (%d) module "
4476 "parameter is set; updelay and downdelay have "
4477 "no effect unless miimon is set\n",
4478 updelay
, downdelay
);
4481 /* don't allow arp monitoring */
4483 printk(KERN_WARNING DRV_NAME
4484 ": Warning: miimon (%d) and arp_interval (%d) "
4485 "can't be used simultaneously, disabling ARP "
4487 miimon
, arp_interval
);
4491 if ((updelay
% miimon
) != 0) {
4492 printk(KERN_WARNING DRV_NAME
4493 ": Warning: updelay (%d) is not a multiple "
4494 "of miimon (%d), updelay rounded to %d ms\n",
4495 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4500 if ((downdelay
% miimon
) != 0) {
4501 printk(KERN_WARNING DRV_NAME
4502 ": Warning: downdelay (%d) is not a multiple "
4503 "of miimon (%d), downdelay rounded to %d ms\n",
4505 (downdelay
/ miimon
) * miimon
);
4508 downdelay
/= miimon
;
4511 if (arp_interval
< 0) {
4512 printk(KERN_WARNING DRV_NAME
4513 ": Warning: arp_interval module parameter (%d) "
4514 ", not in range 0-%d, so it was reset to %d\n",
4515 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4516 arp_interval
= BOND_LINK_ARP_INTERV
;
4519 for (arp_ip_count
= 0;
4520 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4522 /* not complete check, but should be good enough to
4524 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4525 printk(KERN_WARNING DRV_NAME
4526 ": Warning: bad arp_ip_target module parameter "
4527 "(%s), ARP monitoring will not be performed\n",
4528 arp_ip_target
[arp_ip_count
]);
4531 u32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4532 arp_target
[arp_ip_count
] = ip
;
4536 if (arp_interval
&& !arp_ip_count
) {
4537 /* don't allow arping if no arp_ip_target given... */
4538 printk(KERN_WARNING DRV_NAME
4539 ": Warning: arp_interval module parameter (%d) "
4540 "specified without providing an arp_ip_target "
4541 "parameter, arp_interval was reset to 0\n",
4547 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4548 printk(KERN_ERR DRV_NAME
4549 ": arp_validate only supported in active-backup mode\n");
4552 if (!arp_interval
) {
4553 printk(KERN_ERR DRV_NAME
4554 ": arp_validate requires arp_interval\n");
4558 arp_validate_value
= bond_parse_parm(arp_validate
,
4560 if (arp_validate_value
== -1) {
4561 printk(KERN_ERR DRV_NAME
4562 ": Error: invalid arp_validate \"%s\"\n",
4563 arp_validate
== NULL
? "NULL" : arp_validate
);
4567 arp_validate_value
= 0;
4570 printk(KERN_INFO DRV_NAME
4571 ": MII link monitoring set to %d ms\n",
4573 } else if (arp_interval
) {
4576 printk(KERN_INFO DRV_NAME
4577 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4579 arp_validate_tbl
[arp_validate_value
].modename
,
4582 for (i
= 0; i
< arp_ip_count
; i
++)
4583 printk (" %s", arp_ip_target
[i
]);
4588 /* miimon and arp_interval not set, we need one so things
4589 * work as expected, see bonding.txt for details
4591 printk(KERN_WARNING DRV_NAME
4592 ": Warning: either miimon or arp_interval and "
4593 "arp_ip_target module parameters must be specified, "
4594 "otherwise bonding will not detect link failures! see "
4595 "bonding.txt for details.\n");
4598 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4599 /* currently, using a primary only makes sense
4600 * in active backup, TLB or ALB modes
4602 printk(KERN_WARNING DRV_NAME
4603 ": Warning: %s primary device specified but has no "
4604 "effect in %s mode\n",
4605 primary
, bond_mode_name(bond_mode
));
4609 /* fill params struct with the proper values */
4610 params
->mode
= bond_mode
;
4611 params
->xmit_policy
= xmit_hashtype
;
4612 params
->miimon
= miimon
;
4613 params
->arp_interval
= arp_interval
;
4614 params
->arp_validate
= arp_validate_value
;
4615 params
->updelay
= updelay
;
4616 params
->downdelay
= downdelay
;
4617 params
->use_carrier
= use_carrier
;
4618 params
->lacp_fast
= lacp_fast
;
4619 params
->primary
[0] = 0;
4622 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4623 params
->primary
[IFNAMSIZ
- 1] = 0;
4626 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4631 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4633 /* Create a new bond based on the specified name and bonding parameters.
4634 * If name is NULL, obtain a suitable "bond%d" name for us.
4635 * Caller must NOT hold rtnl_lock; we need to release it here before we
4636 * set up our sysfs entries.
4638 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4640 struct net_device
*bond_dev
;
4644 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
4647 printk(KERN_ERR DRV_NAME
4648 ": %s: eek! can't alloc netdev!\n",
4655 res
= dev_alloc_name(bond_dev
, "bond%d");
4660 /* bond_init() must be called after dev_alloc_name() (for the
4661 * /proc files), but before register_netdevice(), because we
4662 * need to set function pointers.
4665 res
= bond_init(bond_dev
, params
);
4670 SET_MODULE_OWNER(bond_dev
);
4672 res
= register_netdevice(bond_dev
);
4677 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4680 *newbond
= bond_dev
->priv
;
4682 netif_carrier_off(bond_dev
);
4684 rtnl_unlock(); /* allows sysfs registration of net device */
4685 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4694 bond_deinit(bond_dev
);
4696 free_netdev(bond_dev
);
4702 static int __init
bonding_init(void)
4707 printk(KERN_INFO
"%s", version
);
4709 res
= bond_check_params(&bonding_defaults
);
4714 #ifdef CONFIG_PROC_FS
4715 bond_create_proc_dir();
4717 for (i
= 0; i
< max_bonds
; i
++) {
4718 res
= bond_create(NULL
, &bonding_defaults
, NULL
);
4723 res
= bond_create_sysfs();
4727 register_netdevice_notifier(&bond_netdev_notifier
);
4728 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4734 bond_destroy_sysfs();
4741 static void __exit
bonding_exit(void)
4743 unregister_netdevice_notifier(&bond_netdev_notifier
);
4744 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4748 bond_destroy_sysfs();
4752 module_init(bonding_init
);
4753 module_exit(bonding_exit
);
4754 MODULE_LICENSE("GPL");
4755 MODULE_VERSION(DRV_VERSION
);
4756 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4757 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4758 MODULE_SUPPORTED_DEVICE("most ethernet devices");