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>
78 #include <net/net_namespace.h>
83 /*---------------------------- Module parameters ----------------------------*/
85 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
86 #define BOND_LINK_MON_INTERV 0
87 #define BOND_LINK_ARP_INTERV 0
89 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
90 static int miimon
= BOND_LINK_MON_INTERV
;
91 static int updelay
= 0;
92 static int downdelay
= 0;
93 static int use_carrier
= 1;
94 static char *mode
= NULL
;
95 static char *primary
= NULL
;
96 static char *lacp_rate
= NULL
;
97 static char *xmit_hash_policy
= NULL
;
98 static int arp_interval
= BOND_LINK_ARP_INTERV
;
99 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
100 static char *arp_validate
= NULL
;
101 struct bond_params bonding_defaults
;
103 module_param(max_bonds
, int, 0);
104 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
105 module_param(miimon
, int, 0);
106 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
107 module_param(updelay
, int, 0);
108 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
109 module_param(downdelay
, int, 0);
110 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
112 module_param(use_carrier
, int, 0);
113 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
114 "0 for off, 1 for on (default)");
115 module_param(mode
, charp
, 0);
116 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
117 "1 for active-backup, 2 for balance-xor, "
118 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
119 "6 for balance-alb");
120 module_param(primary
, charp
, 0);
121 MODULE_PARM_DESC(primary
, "Primary network device to use");
122 module_param(lacp_rate
, charp
, 0);
123 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
125 module_param(xmit_hash_policy
, charp
, 0);
126 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
127 ", 1 for layer 3+4");
128 module_param(arp_interval
, int, 0);
129 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
130 module_param_array(arp_ip_target
, charp
, NULL
, 0);
131 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
132 module_param(arp_validate
, charp
, 0);
133 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
135 /*----------------------------- Global variables ----------------------------*/
137 static const char * const version
=
138 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
140 LIST_HEAD(bond_dev_list
);
142 #ifdef CONFIG_PROC_FS
143 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
146 extern struct rw_semaphore bonding_rwsem
;
147 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
148 static int arp_ip_count
= 0;
149 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
150 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
151 static int lacp_fast
= 0;
154 struct bond_parm_tbl bond_lacp_tbl
[] = {
155 { "slow", AD_LACP_SLOW
},
156 { "fast", AD_LACP_FAST
},
160 struct bond_parm_tbl bond_mode_tbl
[] = {
161 { "balance-rr", BOND_MODE_ROUNDROBIN
},
162 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
163 { "balance-xor", BOND_MODE_XOR
},
164 { "broadcast", BOND_MODE_BROADCAST
},
165 { "802.3ad", BOND_MODE_8023AD
},
166 { "balance-tlb", BOND_MODE_TLB
},
167 { "balance-alb", BOND_MODE_ALB
},
171 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
172 { "layer2", BOND_XMIT_POLICY_LAYER2
},
173 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
177 struct bond_parm_tbl arp_validate_tbl
[] = {
178 { "none", BOND_ARP_VALIDATE_NONE
},
179 { "active", BOND_ARP_VALIDATE_ACTIVE
},
180 { "backup", BOND_ARP_VALIDATE_BACKUP
},
181 { "all", BOND_ARP_VALIDATE_ALL
},
185 /*-------------------------- Forward declarations ---------------------------*/
187 static void bond_send_gratuitous_arp(struct bonding
*bond
);
189 /*---------------------------- General routines -----------------------------*/
191 static const char *bond_mode_name(int mode
)
194 case BOND_MODE_ROUNDROBIN
:
195 return "load balancing (round-robin)";
196 case BOND_MODE_ACTIVEBACKUP
:
197 return "fault-tolerance (active-backup)";
199 return "load balancing (xor)";
200 case BOND_MODE_BROADCAST
:
201 return "fault-tolerance (broadcast)";
202 case BOND_MODE_8023AD
:
203 return "IEEE 802.3ad Dynamic link aggregation";
205 return "transmit load balancing";
207 return "adaptive load balancing";
213 /*---------------------------------- VLAN -----------------------------------*/
216 * bond_add_vlan - add a new vlan id on bond
217 * @bond: bond that got the notification
218 * @vlan_id: the vlan id to add
220 * Returns -ENOMEM if allocation failed.
222 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
224 struct vlan_entry
*vlan
;
226 dprintk("bond: %s, vlan id %d\n",
227 (bond
? bond
->dev
->name
: "None"), vlan_id
);
229 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
234 INIT_LIST_HEAD(&vlan
->vlan_list
);
235 vlan
->vlan_id
= vlan_id
;
238 write_lock_bh(&bond
->lock
);
240 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
242 write_unlock_bh(&bond
->lock
);
244 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
250 * bond_del_vlan - delete a vlan id from bond
251 * @bond: bond that got the notification
252 * @vlan_id: the vlan id to delete
254 * returns -ENODEV if @vlan_id was not found in @bond.
256 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
258 struct vlan_entry
*vlan
, *next
;
261 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
263 write_lock_bh(&bond
->lock
);
265 list_for_each_entry_safe(vlan
, next
, &bond
->vlan_list
, vlan_list
) {
266 if (vlan
->vlan_id
== vlan_id
) {
267 list_del(&vlan
->vlan_list
);
269 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
270 (bond
->params
.mode
== BOND_MODE_ALB
)) {
271 bond_alb_clear_vlan(bond
, vlan_id
);
274 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
279 if (list_empty(&bond
->vlan_list
) &&
280 (bond
->slave_cnt
== 0)) {
281 /* Last VLAN removed and no slaves, so
282 * restore block on adding VLANs. This will
283 * be removed once new slaves that are not
284 * VLAN challenged will be added.
286 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
294 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
298 write_unlock_bh(&bond
->lock
);
303 * bond_has_challenged_slaves
304 * @bond: the bond we're working on
306 * Searches the slave list. Returns 1 if a vlan challenged slave
307 * was found, 0 otherwise.
309 * Assumes bond->lock is held.
311 static int bond_has_challenged_slaves(struct bonding
*bond
)
316 bond_for_each_slave(bond
, slave
, i
) {
317 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
318 dprintk("found VLAN challenged slave - %s\n",
324 dprintk("no VLAN challenged slaves found\n");
329 * bond_next_vlan - safely skip to the next item in the vlans list.
330 * @bond: the bond we're working on
331 * @curr: item we're advancing from
333 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
334 * or @curr->next otherwise (even if it is @curr itself again).
336 * Caller must hold bond->lock
338 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
340 struct vlan_entry
*next
, *last
;
342 if (list_empty(&bond
->vlan_list
)) {
347 next
= list_entry(bond
->vlan_list
.next
,
348 struct vlan_entry
, vlan_list
);
350 last
= list_entry(bond
->vlan_list
.prev
,
351 struct vlan_entry
, vlan_list
);
353 next
= list_entry(bond
->vlan_list
.next
,
354 struct vlan_entry
, vlan_list
);
356 next
= list_entry(curr
->vlan_list
.next
,
357 struct vlan_entry
, vlan_list
);
365 * bond_dev_queue_xmit - Prepare skb for xmit.
367 * @bond: bond device that got this skb for tx.
368 * @skb: hw accel VLAN tagged skb to transmit
369 * @slave_dev: slave that is supposed to xmit this skbuff
371 * When the bond gets an skb to transmit that is
372 * already hardware accelerated VLAN tagged, and it
373 * needs to relay this skb to a slave that is not
374 * hw accel capable, the skb needs to be "unaccelerated",
375 * i.e. strip the hwaccel tag and re-insert it as part
378 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
380 unsigned short vlan_id
;
382 if (!list_empty(&bond
->vlan_list
) &&
383 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
384 vlan_get_tag(skb
, &vlan_id
) == 0) {
385 skb
->dev
= slave_dev
;
386 skb
= vlan_put_tag(skb
, vlan_id
);
388 /* vlan_put_tag() frees the skb in case of error,
389 * so return success here so the calling functions
390 * won't attempt to free is again.
395 skb
->dev
= slave_dev
;
405 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
406 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
408 * a. This operation is performed in IOCTL context,
409 * b. The operation is protected by the RTNL semaphore in the 8021q code,
410 * c. Holding a lock with BH disabled while directly calling a base driver
411 * entry point is generally a BAD idea.
413 * The design of synchronization/protection for this operation in the 8021q
414 * module is good for one or more VLAN devices over a single physical device
415 * and cannot be extended for a teaming solution like bonding, so there is a
416 * potential race condition here where a net device from the vlan group might
417 * be referenced (either by a base driver or the 8021q code) while it is being
418 * removed from the system. However, it turns out we're not making matters
419 * worse, and if it works for regular VLAN usage it will work here too.
423 * bond_vlan_rx_register - Propagates registration to slaves
424 * @bond_dev: bonding net device that got called
425 * @grp: vlan group being registered
427 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
429 struct bonding
*bond
= bond_dev
->priv
;
435 bond_for_each_slave(bond
, slave
, i
) {
436 struct net_device
*slave_dev
= slave
->dev
;
438 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
439 slave_dev
->vlan_rx_register
) {
440 slave_dev
->vlan_rx_register(slave_dev
, grp
);
446 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
447 * @bond_dev: bonding net device that got called
448 * @vid: vlan id being added
450 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
452 struct bonding
*bond
= bond_dev
->priv
;
456 bond_for_each_slave(bond
, slave
, i
) {
457 struct net_device
*slave_dev
= slave
->dev
;
459 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
460 slave_dev
->vlan_rx_add_vid
) {
461 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
465 res
= bond_add_vlan(bond
, vid
);
467 printk(KERN_ERR DRV_NAME
468 ": %s: Error: Failed to add vlan id %d\n",
469 bond_dev
->name
, vid
);
474 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
475 * @bond_dev: bonding net device that got called
476 * @vid: vlan id being removed
478 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
480 struct bonding
*bond
= bond_dev
->priv
;
482 struct net_device
*vlan_dev
;
485 bond_for_each_slave(bond
, slave
, i
) {
486 struct net_device
*slave_dev
= slave
->dev
;
488 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
489 slave_dev
->vlan_rx_kill_vid
) {
490 /* Save and then restore vlan_dev in the grp array,
491 * since the slave's driver might clear it.
493 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
494 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
495 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
499 res
= bond_del_vlan(bond
, vid
);
501 printk(KERN_ERR DRV_NAME
502 ": %s: Error: Failed to remove vlan id %d\n",
503 bond_dev
->name
, vid
);
507 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
509 struct vlan_entry
*vlan
;
511 write_lock_bh(&bond
->lock
);
513 if (list_empty(&bond
->vlan_list
)) {
517 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
518 slave_dev
->vlan_rx_register
) {
519 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
522 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
523 !(slave_dev
->vlan_rx_add_vid
)) {
527 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
528 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
532 write_unlock_bh(&bond
->lock
);
535 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
537 struct vlan_entry
*vlan
;
538 struct net_device
*vlan_dev
;
540 write_lock_bh(&bond
->lock
);
542 if (list_empty(&bond
->vlan_list
)) {
546 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
547 !(slave_dev
->vlan_rx_kill_vid
)) {
551 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
552 /* Save and then restore vlan_dev in the grp array,
553 * since the slave's driver might clear it.
555 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
556 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
557 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
561 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
562 slave_dev
->vlan_rx_register
) {
563 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
567 write_unlock_bh(&bond
->lock
);
570 /*------------------------------- Link status -------------------------------*/
573 * Set the carrier state for the master according to the state of its
574 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
575 * do special 802.3ad magic.
577 * Returns zero if carrier state does not change, nonzero if it does.
579 static int bond_set_carrier(struct bonding
*bond
)
584 if (bond
->slave_cnt
== 0)
587 if (bond
->params
.mode
== BOND_MODE_8023AD
)
588 return bond_3ad_set_carrier(bond
);
590 bond_for_each_slave(bond
, slave
, i
) {
591 if (slave
->link
== BOND_LINK_UP
) {
592 if (!netif_carrier_ok(bond
->dev
)) {
593 netif_carrier_on(bond
->dev
);
601 if (netif_carrier_ok(bond
->dev
)) {
602 netif_carrier_off(bond
->dev
);
609 * Get link speed and duplex from the slave's base driver
610 * using ethtool. If for some reason the call fails or the
611 * values are invalid, fake speed and duplex to 100/Full
614 static int bond_update_speed_duplex(struct slave
*slave
)
616 struct net_device
*slave_dev
= slave
->dev
;
617 struct ethtool_cmd etool
;
620 /* Fake speed and duplex */
621 slave
->speed
= SPEED_100
;
622 slave
->duplex
= DUPLEX_FULL
;
624 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
627 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
631 switch (etool
.speed
) {
641 switch (etool
.duplex
) {
649 slave
->speed
= etool
.speed
;
650 slave
->duplex
= etool
.duplex
;
656 * if <dev> supports MII link status reporting, check its link status.
658 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
659 * depening upon the setting of the use_carrier parameter.
661 * Return either BMSR_LSTATUS, meaning that the link is up (or we
662 * can't tell and just pretend it is), or 0, meaning that the link is
665 * If reporting is non-zero, instead of faking link up, return -1 if
666 * both ETHTOOL and MII ioctls fail (meaning the device does not
667 * support them). If use_carrier is set, return whatever it says.
668 * It'd be nice if there was a good way to tell if a driver supports
669 * netif_carrier, but there really isn't.
671 static int bond_check_dev_link(struct bonding
*bond
, struct net_device
*slave_dev
, int reporting
)
673 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
675 struct mii_ioctl_data
*mii
;
677 if (bond
->params
.use_carrier
) {
678 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
681 ioctl
= slave_dev
->do_ioctl
;
683 /* TODO: set pointer to correct ioctl on a per team member */
684 /* bases to make this more efficient. that is, once */
685 /* we determine the correct ioctl, we will always */
686 /* call it and not the others for that team */
690 * We cannot assume that SIOCGMIIPHY will also read a
691 * register; not all network drivers (e.g., e100)
695 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
696 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
698 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
699 mii
->reg_num
= MII_BMSR
;
700 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
701 return (mii
->val_out
& BMSR_LSTATUS
);
707 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
708 * attempt to get link status from it if the above MII ioctls fail.
710 if (slave_dev
->ethtool_ops
) {
711 if (slave_dev
->ethtool_ops
->get_link
) {
714 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
716 return link
? BMSR_LSTATUS
: 0;
721 * If reporting, report that either there's no dev->do_ioctl,
722 * or both SIOCGMIIREG and get_link failed (meaning that we
723 * cannot report link status). If not reporting, pretend
726 return (reporting
? -1 : BMSR_LSTATUS
);
729 /*----------------------------- Multicast list ------------------------------*/
732 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
734 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
736 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
737 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
741 * returns dmi entry if found, NULL otherwise
743 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
745 struct dev_mc_list
*idmi
;
747 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
748 if (bond_is_dmi_same(dmi
, idmi
)) {
757 * Push the promiscuity flag down to appropriate slaves
759 static void bond_set_promiscuity(struct bonding
*bond
, int inc
)
761 if (USES_PRIMARY(bond
->params
.mode
)) {
762 /* write lock already acquired */
763 if (bond
->curr_active_slave
) {
764 dev_set_promiscuity(bond
->curr_active_slave
->dev
, inc
);
769 bond_for_each_slave(bond
, slave
, i
) {
770 dev_set_promiscuity(slave
->dev
, inc
);
776 * Push the allmulti flag down to all slaves
778 static void bond_set_allmulti(struct bonding
*bond
, int inc
)
780 if (USES_PRIMARY(bond
->params
.mode
)) {
781 /* write lock already acquired */
782 if (bond
->curr_active_slave
) {
783 dev_set_allmulti(bond
->curr_active_slave
->dev
, inc
);
788 bond_for_each_slave(bond
, slave
, i
) {
789 dev_set_allmulti(slave
->dev
, inc
);
795 * Add a Multicast address to slaves
798 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
800 if (USES_PRIMARY(bond
->params
.mode
)) {
801 /* write lock already acquired */
802 if (bond
->curr_active_slave
) {
803 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
808 bond_for_each_slave(bond
, slave
, i
) {
809 dev_mc_add(slave
->dev
, addr
, alen
, 0);
815 * Remove a multicast address from slave
818 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
820 if (USES_PRIMARY(bond
->params
.mode
)) {
821 /* write lock already acquired */
822 if (bond
->curr_active_slave
) {
823 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
828 bond_for_each_slave(bond
, slave
, i
) {
829 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
836 * Retrieve the list of registered multicast addresses for the bonding
837 * device and retransmit an IGMP JOIN request to the current active
840 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
842 struct in_device
*in_dev
;
843 struct ip_mc_list
*im
;
846 in_dev
= __in_dev_get_rcu(bond
->dev
);
848 for (im
= in_dev
->mc_list
; im
; im
= im
->next
) {
849 ip_mc_rejoin_group(im
);
857 * Totally destroys the mc_list in bond
859 static void bond_mc_list_destroy(struct bonding
*bond
)
861 struct dev_mc_list
*dmi
;
865 bond
->mc_list
= dmi
->next
;
869 bond
->mc_list
= NULL
;
873 * Copy all the Multicast addresses from src to the bonding device dst
875 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
878 struct dev_mc_list
*dmi
, *new_dmi
;
880 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
881 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
884 /* FIXME: Potential memory leak !!! */
888 new_dmi
->next
= bond
->mc_list
;
889 bond
->mc_list
= new_dmi
;
890 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
891 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
892 new_dmi
->dmi_users
= dmi
->dmi_users
;
893 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
900 * flush all members of flush->mc_list from device dev->mc_list
902 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
904 struct bonding
*bond
= bond_dev
->priv
;
905 struct dev_mc_list
*dmi
;
907 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
908 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
911 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
912 /* del lacpdu mc addr from mc list */
913 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
915 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
919 /*--------------------------- Active slave change ---------------------------*/
922 * Update the mc list and multicast-related flags for the new and
923 * old active slaves (if any) according to the multicast mode, and
924 * promiscuous flags unconditionally.
926 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
928 struct dev_mc_list
*dmi
;
930 if (!USES_PRIMARY(bond
->params
.mode
)) {
931 /* nothing to do - mc list is already up-to-date on
938 if (bond
->dev
->flags
& IFF_PROMISC
) {
939 dev_set_promiscuity(old_active
->dev
, -1);
942 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
943 dev_set_allmulti(old_active
->dev
, -1);
946 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
947 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
952 if (bond
->dev
->flags
& IFF_PROMISC
) {
953 dev_set_promiscuity(new_active
->dev
, 1);
956 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
957 dev_set_allmulti(new_active
->dev
, 1);
960 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
961 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
963 bond_resend_igmp_join_requests(bond
);
968 * find_best_interface - select the best available slave to be the active one
969 * @bond: our bonding struct
971 * Warning: Caller must hold curr_slave_lock for writing.
973 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
975 struct slave
*new_active
, *old_active
;
976 struct slave
*bestslave
= NULL
;
977 int mintime
= bond
->params
.updelay
;
980 new_active
= old_active
= bond
->curr_active_slave
;
982 if (!new_active
) { /* there were no active slaves left */
983 if (bond
->slave_cnt
> 0) { /* found one slave */
984 new_active
= bond
->first_slave
;
986 return NULL
; /* still no slave, return NULL */
990 /* first try the primary link; if arping, a link must tx/rx traffic
991 * before it can be considered the curr_active_slave - also, we would skip
992 * slaves between the curr_active_slave and primary_slave that may be up
995 if ((bond
->primary_slave
) &&
996 (!bond
->params
.arp_interval
) &&
997 (IS_UP(bond
->primary_slave
->dev
))) {
998 new_active
= bond
->primary_slave
;
1001 /* remember where to stop iterating over the slaves */
1002 old_active
= new_active
;
1004 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1005 if (IS_UP(new_active
->dev
)) {
1006 if (new_active
->link
== BOND_LINK_UP
) {
1008 } else if (new_active
->link
== BOND_LINK_BACK
) {
1009 /* link up, but waiting for stabilization */
1010 if (new_active
->delay
< mintime
) {
1011 mintime
= new_active
->delay
;
1012 bestslave
= new_active
;
1022 * change_active_interface - change the active slave into the specified one
1023 * @bond: our bonding struct
1024 * @new: the new slave to make the active one
1026 * Set the new slave to the bond's settings and unset them on the old
1027 * curr_active_slave.
1028 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1030 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1031 * because it is apparently the best available slave we have, even though its
1032 * updelay hasn't timed out yet.
1034 * Warning: Caller must hold curr_slave_lock for writing.
1036 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1038 struct slave
*old_active
= bond
->curr_active_slave
;
1040 if (old_active
== new_active
) {
1045 if (new_active
->link
== BOND_LINK_BACK
) {
1046 if (USES_PRIMARY(bond
->params
.mode
)) {
1047 printk(KERN_INFO DRV_NAME
1048 ": %s: making interface %s the new "
1049 "active one %d ms earlier.\n",
1050 bond
->dev
->name
, new_active
->dev
->name
,
1051 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1054 new_active
->delay
= 0;
1055 new_active
->link
= BOND_LINK_UP
;
1056 new_active
->jiffies
= jiffies
;
1058 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1059 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1062 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1063 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1064 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1067 if (USES_PRIMARY(bond
->params
.mode
)) {
1068 printk(KERN_INFO DRV_NAME
1069 ": %s: making interface %s the new "
1071 bond
->dev
->name
, new_active
->dev
->name
);
1076 if (USES_PRIMARY(bond
->params
.mode
)) {
1077 bond_mc_swap(bond
, new_active
, old_active
);
1080 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1081 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1082 bond_alb_handle_active_change(bond
, new_active
);
1084 bond_set_slave_inactive_flags(old_active
);
1086 bond_set_slave_active_flags(new_active
);
1088 bond
->curr_active_slave
= new_active
;
1091 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1093 bond_set_slave_inactive_flags(old_active
);
1097 bond_set_slave_active_flags(new_active
);
1099 bond_send_gratuitous_arp(bond
);
1104 * bond_select_active_slave - select a new active slave, if needed
1105 * @bond: our bonding struct
1107 * This functions shoud be called when one of the following occurs:
1108 * - The old curr_active_slave has been released or lost its link.
1109 * - The primary_slave has got its link back.
1110 * - A slave has got its link back and there's no old curr_active_slave.
1112 * Warning: Caller must hold curr_slave_lock for writing.
1114 void bond_select_active_slave(struct bonding
*bond
)
1116 struct slave
*best_slave
;
1119 best_slave
= bond_find_best_slave(bond
);
1120 if (best_slave
!= bond
->curr_active_slave
) {
1121 bond_change_active_slave(bond
, best_slave
);
1122 rv
= bond_set_carrier(bond
);
1126 if (netif_carrier_ok(bond
->dev
)) {
1127 printk(KERN_INFO DRV_NAME
1128 ": %s: first active interface up!\n",
1131 printk(KERN_INFO DRV_NAME
": %s: "
1132 "now running without any active interface !\n",
1138 /*--------------------------- slave list handling ---------------------------*/
1141 * This function attaches the slave to the end of list.
1143 * bond->lock held for writing by caller.
1145 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1147 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1148 new_slave
->next
= new_slave
;
1149 new_slave
->prev
= new_slave
;
1150 bond
->first_slave
= new_slave
;
1152 new_slave
->next
= bond
->first_slave
;
1153 new_slave
->prev
= bond
->first_slave
->prev
;
1154 new_slave
->next
->prev
= new_slave
;
1155 new_slave
->prev
->next
= new_slave
;
1162 * This function detaches the slave from the list.
1163 * WARNING: no check is made to verify if the slave effectively
1164 * belongs to <bond>.
1165 * Nothing is freed on return, structures are just unchained.
1166 * If any slave pointer in bond was pointing to <slave>,
1167 * it should be changed by the calling function.
1169 * bond->lock held for writing by caller.
1171 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1174 slave
->next
->prev
= slave
->prev
;
1178 slave
->prev
->next
= slave
->next
;
1181 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1182 if (bond
->slave_cnt
> 1) { /* there are more slave */
1183 bond
->first_slave
= slave
->next
;
1185 bond
->first_slave
= NULL
; /* slave was the last one */
1194 /*---------------------------------- IOCTL ----------------------------------*/
1196 static int bond_sethwaddr(struct net_device
*bond_dev
,
1197 struct net_device
*slave_dev
)
1199 dprintk("bond_dev=%p\n", bond_dev
);
1200 dprintk("slave_dev=%p\n", slave_dev
);
1201 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1202 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1206 #define BOND_VLAN_FEATURES \
1207 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1208 NETIF_F_HW_VLAN_FILTER)
1211 * Compute the common dev->feature set available to all slaves. Some
1212 * feature bits are managed elsewhere, so preserve those feature bits
1213 * on the master device.
1215 static int bond_compute_features(struct bonding
*bond
)
1217 struct slave
*slave
;
1218 struct net_device
*bond_dev
= bond
->dev
;
1219 unsigned long features
= bond_dev
->features
;
1220 unsigned short max_hard_header_len
= ETH_HLEN
;
1223 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1224 features
|= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
1225 NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1227 bond_for_each_slave(bond
, slave
, i
) {
1228 features
= netdev_compute_features(features
,
1229 slave
->dev
->features
);
1230 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1231 max_hard_header_len
= slave
->dev
->hard_header_len
;
1234 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1235 bond_dev
->features
= features
;
1236 bond_dev
->hard_header_len
= max_hard_header_len
;
1241 /* enslave device <slave> to bond device <master> */
1242 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1244 struct bonding
*bond
= bond_dev
->priv
;
1245 struct slave
*new_slave
= NULL
;
1246 struct dev_mc_list
*dmi
;
1247 struct sockaddr addr
;
1249 int old_features
= bond_dev
->features
;
1252 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1253 slave_dev
->do_ioctl
== NULL
) {
1254 printk(KERN_WARNING DRV_NAME
1255 ": %s: Warning: no link monitoring support for %s\n",
1256 bond_dev
->name
, slave_dev
->name
);
1259 /* bond must be initialized by bond_open() before enslaving */
1260 if (!(bond_dev
->flags
& IFF_UP
)) {
1261 dprintk("Error, master_dev is not up\n");
1265 /* already enslaved */
1266 if (slave_dev
->flags
& IFF_SLAVE
) {
1267 dprintk("Error, Device was already enslaved\n");
1271 /* vlan challenged mutual exclusion */
1272 /* no need to lock since we're protected by rtnl_lock */
1273 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1274 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1275 if (!list_empty(&bond
->vlan_list
)) {
1276 printk(KERN_ERR DRV_NAME
1277 ": %s: Error: cannot enslave VLAN "
1278 "challenged slave %s on VLAN enabled "
1279 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1283 printk(KERN_WARNING DRV_NAME
1284 ": %s: Warning: enslaved VLAN challenged "
1285 "slave %s. Adding VLANs will be blocked as "
1286 "long as %s is part of bond %s\n",
1287 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1289 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1292 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1293 if (bond
->slave_cnt
== 0) {
1294 /* First slave, and it is not VLAN challenged,
1295 * so remove the block of adding VLANs over the bond.
1297 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1302 * Old ifenslave binaries are no longer supported. These can
1303 * be identified with moderate accurary by the state of the slave:
1304 * the current ifenslave will set the interface down prior to
1305 * enslaving it; the old ifenslave will not.
1307 if ((slave_dev
->flags
& IFF_UP
)) {
1308 printk(KERN_ERR DRV_NAME
": %s is up. "
1309 "This may be due to an out of date ifenslave.\n",
1312 goto err_undo_flags
;
1315 if (slave_dev
->set_mac_address
== NULL
) {
1316 printk(KERN_ERR DRV_NAME
1317 ": %s: Error: The slave device you specified does "
1318 "not support setting the MAC address. "
1319 "Your kernel likely does not support slave "
1320 "devices.\n", bond_dev
->name
);
1322 goto err_undo_flags
;
1325 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1328 goto err_undo_flags
;
1331 /* save slave's original flags before calling
1332 * netdev_set_master and dev_open
1334 new_slave
->original_flags
= slave_dev
->flags
;
1337 * Save slave's original ("permanent") mac address for modes
1338 * that need it, and for restoring it upon release, and then
1339 * set it to the master's address
1341 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1344 * Set slave to master's mac address. The application already
1345 * set the master's mac address to that of the first slave
1347 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1348 addr
.sa_family
= slave_dev
->type
;
1349 res
= dev_set_mac_address(slave_dev
, &addr
);
1351 dprintk("Error %d calling set_mac_address\n", res
);
1355 res
= netdev_set_master(slave_dev
, bond_dev
);
1357 dprintk("Error %d calling netdev_set_master\n", res
);
1360 /* open the slave since the application closed it */
1361 res
= dev_open(slave_dev
);
1363 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1364 goto err_restore_mac
;
1367 new_slave
->dev
= slave_dev
;
1368 slave_dev
->priv_flags
|= IFF_BONDING
;
1370 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1371 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1372 /* bond_alb_init_slave() must be called before all other stages since
1373 * it might fail and we do not want to have to undo everything
1375 res
= bond_alb_init_slave(bond
, new_slave
);
1377 goto err_unset_master
;
1381 /* If the mode USES_PRIMARY, then the new slave gets the
1382 * master's promisc (and mc) settings only if it becomes the
1383 * curr_active_slave, and that is taken care of later when calling
1384 * bond_change_active()
1386 if (!USES_PRIMARY(bond
->params
.mode
)) {
1387 /* set promiscuity level to new slave */
1388 if (bond_dev
->flags
& IFF_PROMISC
) {
1389 dev_set_promiscuity(slave_dev
, 1);
1392 /* set allmulti level to new slave */
1393 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1394 dev_set_allmulti(slave_dev
, 1);
1397 /* upload master's mc_list to new slave */
1398 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1399 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1403 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1404 /* add lacpdu mc addr to mc list */
1405 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1407 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1410 bond_add_vlans_on_slave(bond
, slave_dev
);
1412 write_lock_bh(&bond
->lock
);
1414 bond_attach_slave(bond
, new_slave
);
1416 new_slave
->delay
= 0;
1417 new_slave
->link_failure_count
= 0;
1419 bond_compute_features(bond
);
1421 new_slave
->last_arp_rx
= jiffies
;
1423 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1424 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1426 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1428 * miimon is set but a bonded network driver
1429 * does not support ETHTOOL/MII and
1430 * arp_interval is not set. Note: if
1431 * use_carrier is enabled, we will never go
1432 * here (because netif_carrier is always
1433 * supported); thus, we don't need to change
1434 * the messages for netif_carrier.
1436 printk(KERN_WARNING DRV_NAME
1437 ": %s: Warning: MII and ETHTOOL support not "
1438 "available for interface %s, and "
1439 "arp_interval/arp_ip_target module parameters "
1440 "not specified, thus bonding will not detect "
1441 "link failures! see bonding.txt for details.\n",
1442 bond_dev
->name
, slave_dev
->name
);
1443 } else if (link_reporting
== -1) {
1444 /* unable get link status using mii/ethtool */
1445 printk(KERN_WARNING DRV_NAME
1446 ": %s: Warning: can't get link status from "
1447 "interface %s; the network driver associated "
1448 "with this interface does not support MII or "
1449 "ETHTOOL link status reporting, thus miimon "
1450 "has no effect on this interface.\n",
1451 bond_dev
->name
, slave_dev
->name
);
1455 /* check for initial state */
1456 if (!bond
->params
.miimon
||
1457 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1458 if (bond
->params
.updelay
) {
1459 dprintk("Initial state of slave_dev is "
1460 "BOND_LINK_BACK\n");
1461 new_slave
->link
= BOND_LINK_BACK
;
1462 new_slave
->delay
= bond
->params
.updelay
;
1464 dprintk("Initial state of slave_dev is "
1466 new_slave
->link
= BOND_LINK_UP
;
1468 new_slave
->jiffies
= jiffies
;
1470 dprintk("Initial state of slave_dev is "
1471 "BOND_LINK_DOWN\n");
1472 new_slave
->link
= BOND_LINK_DOWN
;
1475 if (bond_update_speed_duplex(new_slave
) &&
1476 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1477 printk(KERN_WARNING DRV_NAME
1478 ": %s: Warning: failed to get speed and duplex from %s, "
1479 "assumed to be 100Mb/sec and Full.\n",
1480 bond_dev
->name
, new_slave
->dev
->name
);
1482 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1483 printk(KERN_WARNING DRV_NAME
1484 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1485 "support in base driver for proper aggregator "
1486 "selection.\n", bond_dev
->name
);
1490 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1491 /* if there is a primary slave, remember it */
1492 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1493 bond
->primary_slave
= new_slave
;
1497 switch (bond
->params
.mode
) {
1498 case BOND_MODE_ACTIVEBACKUP
:
1499 bond_set_slave_inactive_flags(new_slave
);
1500 bond_select_active_slave(bond
);
1502 case BOND_MODE_8023AD
:
1503 /* in 802.3ad mode, the internal mechanism
1504 * will activate the slaves in the selected
1507 bond_set_slave_inactive_flags(new_slave
);
1508 /* if this is the first slave */
1509 if (bond
->slave_cnt
== 1) {
1510 SLAVE_AD_INFO(new_slave
).id
= 1;
1511 /* Initialize AD with the number of times that the AD timer is called in 1 second
1512 * can be called only after the mac address of the bond is set
1514 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1515 bond
->params
.lacp_fast
);
1517 SLAVE_AD_INFO(new_slave
).id
=
1518 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1521 bond_3ad_bind_slave(new_slave
);
1525 new_slave
->state
= BOND_STATE_ACTIVE
;
1526 if ((!bond
->curr_active_slave
) &&
1527 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1528 /* first slave or no active slave yet, and this link
1529 * is OK, so make this interface the active one
1531 bond_change_active_slave(bond
, new_slave
);
1533 bond_set_slave_inactive_flags(new_slave
);
1537 dprintk("This slave is always active in trunk mode\n");
1539 /* always active in trunk mode */
1540 new_slave
->state
= BOND_STATE_ACTIVE
;
1542 /* In trunking mode there is little meaning to curr_active_slave
1543 * anyway (it holds no special properties of the bond device),
1544 * so we can change it without calling change_active_interface()
1546 if (!bond
->curr_active_slave
) {
1547 bond
->curr_active_slave
= new_slave
;
1550 } /* switch(bond_mode) */
1552 bond_set_carrier(bond
);
1554 write_unlock_bh(&bond
->lock
);
1556 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1558 goto err_unset_master
;
1560 printk(KERN_INFO DRV_NAME
1561 ": %s: enslaving %s as a%s interface with a%s link.\n",
1562 bond_dev
->name
, slave_dev
->name
,
1563 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1564 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1566 /* enslave is successful */
1569 /* Undo stages on error */
1571 netdev_set_master(slave_dev
, NULL
);
1574 dev_close(slave_dev
);
1577 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1578 addr
.sa_family
= slave_dev
->type
;
1579 dev_set_mac_address(slave_dev
, &addr
);
1585 bond_dev
->features
= old_features
;
1591 * Try to release the slave device <slave> from the bond device <master>
1592 * It is legal to access curr_active_slave without a lock because all the function
1595 * The rules for slave state should be:
1596 * for Active/Backup:
1597 * Active stays on all backups go down
1598 * for Bonded connections:
1599 * The first up interface should be left on and all others downed.
1601 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1603 struct bonding
*bond
= bond_dev
->priv
;
1604 struct slave
*slave
, *oldcurrent
;
1605 struct sockaddr addr
;
1606 int mac_addr_differ
;
1607 DECLARE_MAC_BUF(mac
);
1609 /* slave is not a slave or master is not master of this slave */
1610 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1611 (slave_dev
->master
!= bond_dev
)) {
1612 printk(KERN_ERR DRV_NAME
1613 ": %s: Error: cannot release %s.\n",
1614 bond_dev
->name
, slave_dev
->name
);
1618 write_lock_bh(&bond
->lock
);
1620 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1622 /* not a slave of this bond */
1623 printk(KERN_INFO DRV_NAME
1624 ": %s: %s not enslaved\n",
1625 bond_dev
->name
, slave_dev
->name
);
1626 write_unlock_bh(&bond
->lock
);
1630 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1633 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1634 printk(KERN_WARNING DRV_NAME
1635 ": %s: Warning: the permanent HWaddr of %s - "
1636 "%s - is still in use by %s. "
1637 "Set the HWaddr of %s to a different address "
1638 "to avoid conflicts.\n",
1641 print_mac(mac
, slave
->perm_hwaddr
),
1646 /* Inform AD package of unbinding of slave. */
1647 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1648 /* must be called before the slave is
1649 * detached from the list
1651 bond_3ad_unbind_slave(slave
);
1654 printk(KERN_INFO DRV_NAME
1655 ": %s: releasing %s interface %s\n",
1657 (slave
->state
== BOND_STATE_ACTIVE
)
1658 ? "active" : "backup",
1661 oldcurrent
= bond
->curr_active_slave
;
1663 bond
->current_arp_slave
= NULL
;
1665 /* release the slave from its bond */
1666 bond_detach_slave(bond
, slave
);
1668 bond_compute_features(bond
);
1670 if (bond
->primary_slave
== slave
) {
1671 bond
->primary_slave
= NULL
;
1674 if (oldcurrent
== slave
) {
1675 bond_change_active_slave(bond
, NULL
);
1678 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1679 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1680 /* Must be called only after the slave has been
1681 * detached from the list and the curr_active_slave
1682 * has been cleared (if our_slave == old_current),
1683 * but before a new active slave is selected.
1685 bond_alb_deinit_slave(bond
, slave
);
1688 if (oldcurrent
== slave
)
1689 bond_select_active_slave(bond
);
1691 if (bond
->slave_cnt
== 0) {
1692 bond_set_carrier(bond
);
1694 /* if the last slave was removed, zero the mac address
1695 * of the master so it will be set by the application
1696 * to the mac address of the first slave
1698 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1700 if (list_empty(&bond
->vlan_list
)) {
1701 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1703 printk(KERN_WARNING DRV_NAME
1704 ": %s: Warning: clearing HW address of %s while it "
1705 "still has VLANs.\n",
1706 bond_dev
->name
, bond_dev
->name
);
1707 printk(KERN_WARNING DRV_NAME
1708 ": %s: When re-adding slaves, make sure the bond's "
1709 "HW address matches its VLANs'.\n",
1712 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1713 !bond_has_challenged_slaves(bond
)) {
1714 printk(KERN_INFO DRV_NAME
1715 ": %s: last VLAN challenged slave %s "
1716 "left bond %s. VLAN blocking is removed\n",
1717 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1718 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1721 write_unlock_bh(&bond
->lock
);
1723 /* must do this from outside any spinlocks */
1724 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1726 bond_del_vlans_from_slave(bond
, slave_dev
);
1728 /* If the mode USES_PRIMARY, then we should only remove its
1729 * promisc and mc settings if it was the curr_active_slave, but that was
1730 * already taken care of above when we detached the slave
1732 if (!USES_PRIMARY(bond
->params
.mode
)) {
1733 /* unset promiscuity level from slave */
1734 if (bond_dev
->flags
& IFF_PROMISC
) {
1735 dev_set_promiscuity(slave_dev
, -1);
1738 /* unset allmulti level from slave */
1739 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1740 dev_set_allmulti(slave_dev
, -1);
1743 /* flush master's mc_list from slave */
1744 bond_mc_list_flush(bond_dev
, slave_dev
);
1747 netdev_set_master(slave_dev
, NULL
);
1749 /* close slave before restoring its mac address */
1750 dev_close(slave_dev
);
1752 /* restore original ("permanent") mac address */
1753 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1754 addr
.sa_family
= slave_dev
->type
;
1755 dev_set_mac_address(slave_dev
, &addr
);
1757 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1758 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1763 return 0; /* deletion OK */
1767 * This function releases all slaves.
1769 static int bond_release_all(struct net_device
*bond_dev
)
1771 struct bonding
*bond
= bond_dev
->priv
;
1772 struct slave
*slave
;
1773 struct net_device
*slave_dev
;
1774 struct sockaddr addr
;
1776 write_lock_bh(&bond
->lock
);
1778 netif_carrier_off(bond_dev
);
1780 if (bond
->slave_cnt
== 0) {
1784 bond
->current_arp_slave
= NULL
;
1785 bond
->primary_slave
= NULL
;
1786 bond_change_active_slave(bond
, NULL
);
1788 while ((slave
= bond
->first_slave
) != NULL
) {
1789 /* Inform AD package of unbinding of slave
1790 * before slave is detached from the list.
1792 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1793 bond_3ad_unbind_slave(slave
);
1796 slave_dev
= slave
->dev
;
1797 bond_detach_slave(bond
, slave
);
1799 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1800 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1801 /* must be called only after the slave
1802 * has been detached from the list
1804 bond_alb_deinit_slave(bond
, slave
);
1807 bond_compute_features(bond
);
1809 /* now that the slave is detached, unlock and perform
1810 * all the undo steps that should not be called from
1813 write_unlock_bh(&bond
->lock
);
1815 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1816 bond_del_vlans_from_slave(bond
, slave_dev
);
1818 /* If the mode USES_PRIMARY, then we should only remove its
1819 * promisc and mc settings if it was the curr_active_slave, but that was
1820 * already taken care of above when we detached the slave
1822 if (!USES_PRIMARY(bond
->params
.mode
)) {
1823 /* unset promiscuity level from slave */
1824 if (bond_dev
->flags
& IFF_PROMISC
) {
1825 dev_set_promiscuity(slave_dev
, -1);
1828 /* unset allmulti level from slave */
1829 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1830 dev_set_allmulti(slave_dev
, -1);
1833 /* flush master's mc_list from slave */
1834 bond_mc_list_flush(bond_dev
, slave_dev
);
1837 netdev_set_master(slave_dev
, NULL
);
1839 /* close slave before restoring its mac address */
1840 dev_close(slave_dev
);
1842 /* restore original ("permanent") mac address*/
1843 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1844 addr
.sa_family
= slave_dev
->type
;
1845 dev_set_mac_address(slave_dev
, &addr
);
1847 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1848 IFF_SLAVE_INACTIVE
);
1852 /* re-acquire the lock before getting the next slave */
1853 write_lock_bh(&bond
->lock
);
1856 /* zero the mac address of the master so it will be
1857 * set by the application to the mac address of the
1860 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1862 if (list_empty(&bond
->vlan_list
)) {
1863 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1865 printk(KERN_WARNING DRV_NAME
1866 ": %s: Warning: clearing HW address of %s while it "
1867 "still has VLANs.\n",
1868 bond_dev
->name
, bond_dev
->name
);
1869 printk(KERN_WARNING DRV_NAME
1870 ": %s: When re-adding slaves, make sure the bond's "
1871 "HW address matches its VLANs'.\n",
1875 printk(KERN_INFO DRV_NAME
1876 ": %s: released all slaves\n",
1880 write_unlock_bh(&bond
->lock
);
1886 * This function changes the active slave to slave <slave_dev>.
1887 * It returns -EINVAL in the following cases.
1888 * - <slave_dev> is not found in the list.
1889 * - There is not active slave now.
1890 * - <slave_dev> is already active.
1891 * - The link state of <slave_dev> is not BOND_LINK_UP.
1892 * - <slave_dev> is not running.
1893 * In these cases, this fuction does nothing.
1894 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1896 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1898 struct bonding
*bond
= bond_dev
->priv
;
1899 struct slave
*old_active
= NULL
;
1900 struct slave
*new_active
= NULL
;
1903 if (!USES_PRIMARY(bond
->params
.mode
)) {
1907 /* Verify that master_dev is indeed the master of slave_dev */
1908 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1909 (slave_dev
->master
!= bond_dev
)) {
1913 write_lock_bh(&bond
->lock
);
1915 old_active
= bond
->curr_active_slave
;
1916 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1919 * Changing to the current active: do nothing; return success.
1921 if (new_active
&& (new_active
== old_active
)) {
1922 write_unlock_bh(&bond
->lock
);
1928 (new_active
->link
== BOND_LINK_UP
) &&
1929 IS_UP(new_active
->dev
)) {
1930 bond_change_active_slave(bond
, new_active
);
1935 write_unlock_bh(&bond
->lock
);
1940 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1942 struct bonding
*bond
= bond_dev
->priv
;
1944 info
->bond_mode
= bond
->params
.mode
;
1945 info
->miimon
= bond
->params
.miimon
;
1947 read_lock_bh(&bond
->lock
);
1948 info
->num_slaves
= bond
->slave_cnt
;
1949 read_unlock_bh(&bond
->lock
);
1954 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1956 struct bonding
*bond
= bond_dev
->priv
;
1957 struct slave
*slave
;
1960 if (info
->slave_id
< 0) {
1964 read_lock_bh(&bond
->lock
);
1966 bond_for_each_slave(bond
, slave
, i
) {
1967 if (i
== (int)info
->slave_id
) {
1973 read_unlock_bh(&bond
->lock
);
1976 strcpy(info
->slave_name
, slave
->dev
->name
);
1977 info
->link
= slave
->link
;
1978 info
->state
= slave
->state
;
1979 info
->link_failure_count
= slave
->link_failure_count
;
1987 /*-------------------------------- Monitoring -------------------------------*/
1989 /* this function is called regularly to monitor each slave's link. */
1990 void bond_mii_monitor(struct net_device
*bond_dev
)
1992 struct bonding
*bond
= bond_dev
->priv
;
1993 struct slave
*slave
, *oldcurrent
;
1994 int do_failover
= 0;
1998 read_lock(&bond
->lock
);
2000 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2002 if (bond
->kill_timers
) {
2006 if (bond
->slave_cnt
== 0) {
2010 /* we will try to read the link status of each of our slaves, and
2011 * set their IFF_RUNNING flag appropriately. For each slave not
2012 * supporting MII status, we won't do anything so that a user-space
2013 * program could monitor the link itself if needed.
2016 read_lock(&bond
->curr_slave_lock
);
2017 oldcurrent
= bond
->curr_active_slave
;
2018 read_unlock(&bond
->curr_slave_lock
);
2020 bond_for_each_slave(bond
, slave
, i
) {
2021 struct net_device
*slave_dev
= slave
->dev
;
2023 u16 old_speed
= slave
->speed
;
2024 u8 old_duplex
= slave
->duplex
;
2026 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2028 switch (slave
->link
) {
2029 case BOND_LINK_UP
: /* the link was up */
2030 if (link_state
== BMSR_LSTATUS
) {
2031 /* link stays up, nothing more to do */
2033 } else { /* link going down */
2034 slave
->link
= BOND_LINK_FAIL
;
2035 slave
->delay
= bond
->params
.downdelay
;
2037 if (slave
->link_failure_count
< UINT_MAX
) {
2038 slave
->link_failure_count
++;
2041 if (bond
->params
.downdelay
) {
2042 printk(KERN_INFO DRV_NAME
2043 ": %s: link status down for %s "
2044 "interface %s, disabling it in "
2048 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2049 ? ((slave
== oldcurrent
)
2050 ? "active " : "backup ")
2054 bond
->params
.downdelay
* bond
->params
.miimon
);
2057 /* no break ! fall through the BOND_LINK_FAIL test to
2058 ensure proper action to be taken
2060 case BOND_LINK_FAIL
: /* the link has just gone down */
2061 if (link_state
!= BMSR_LSTATUS
) {
2062 /* link stays down */
2063 if (slave
->delay
<= 0) {
2064 /* link down for too long time */
2065 slave
->link
= BOND_LINK_DOWN
;
2067 /* in active/backup mode, we must
2068 * completely disable this interface
2070 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2071 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2072 bond_set_slave_inactive_flags(slave
);
2075 printk(KERN_INFO DRV_NAME
2076 ": %s: link status definitely "
2077 "down for interface %s, "
2082 /* notify ad that the link status has changed */
2083 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2084 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2087 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2088 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2089 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2092 if (slave
== oldcurrent
) {
2100 slave
->link
= BOND_LINK_UP
;
2101 slave
->jiffies
= jiffies
;
2102 printk(KERN_INFO DRV_NAME
2103 ": %s: link status up again after %d "
2104 "ms for interface %s.\n",
2106 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2110 case BOND_LINK_DOWN
: /* the link was down */
2111 if (link_state
!= BMSR_LSTATUS
) {
2112 /* the link stays down, nothing more to do */
2114 } else { /* link going up */
2115 slave
->link
= BOND_LINK_BACK
;
2116 slave
->delay
= bond
->params
.updelay
;
2118 if (bond
->params
.updelay
) {
2119 /* if updelay == 0, no need to
2120 advertise about a 0 ms delay */
2121 printk(KERN_INFO DRV_NAME
2122 ": %s: link status up for "
2123 "interface %s, enabling it "
2127 bond
->params
.updelay
* bond
->params
.miimon
);
2130 /* no break ! fall through the BOND_LINK_BACK state in
2131 case there's something to do.
2133 case BOND_LINK_BACK
: /* the link has just come back */
2134 if (link_state
!= BMSR_LSTATUS
) {
2135 /* link down again */
2136 slave
->link
= BOND_LINK_DOWN
;
2138 printk(KERN_INFO DRV_NAME
2139 ": %s: link status down again after %d "
2140 "ms for interface %s.\n",
2142 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2146 if (slave
->delay
== 0) {
2147 /* now the link has been up for long time enough */
2148 slave
->link
= BOND_LINK_UP
;
2149 slave
->jiffies
= jiffies
;
2151 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2152 /* prevent it from being the active one */
2153 slave
->state
= BOND_STATE_BACKUP
;
2154 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2155 /* make it immediately active */
2156 slave
->state
= BOND_STATE_ACTIVE
;
2157 } else if (slave
!= bond
->primary_slave
) {
2158 /* prevent it from being the active one */
2159 slave
->state
= BOND_STATE_BACKUP
;
2162 printk(KERN_INFO DRV_NAME
2163 ": %s: link status definitely "
2164 "up for interface %s.\n",
2168 /* notify ad that the link status has changed */
2169 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2170 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2173 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2174 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2175 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2178 if ((!oldcurrent
) ||
2179 (slave
== bond
->primary_slave
)) {
2188 /* Should not happen */
2189 printk(KERN_ERR DRV_NAME
2190 ": %s: Error: %s Illegal value (link=%d)\n",
2195 } /* end of switch (slave->link) */
2197 bond_update_speed_duplex(slave
);
2199 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2200 if (old_speed
!= slave
->speed
) {
2201 bond_3ad_adapter_speed_changed(slave
);
2204 if (old_duplex
!= slave
->duplex
) {
2205 bond_3ad_adapter_duplex_changed(slave
);
2212 write_lock(&bond
->curr_slave_lock
);
2214 bond_select_active_slave(bond
);
2216 write_unlock(&bond
->curr_slave_lock
);
2218 bond_set_carrier(bond
);
2221 if (bond
->params
.miimon
) {
2222 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2225 read_unlock(&bond
->lock
);
2229 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2231 struct in_device
*idev
;
2232 struct in_ifaddr
*ifa
;
2239 idev
= __in_dev_get_rcu(dev
);
2243 ifa
= idev
->ifa_list
;
2247 addr
= ifa
->ifa_local
;
2253 static int bond_has_ip(struct bonding
*bond
)
2255 struct vlan_entry
*vlan
, *vlan_next
;
2257 if (bond
->master_ip
)
2260 if (list_empty(&bond
->vlan_list
))
2263 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2272 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2274 struct vlan_entry
*vlan
, *vlan_next
;
2276 if (ip
== bond
->master_ip
)
2279 if (list_empty(&bond
->vlan_list
))
2282 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2284 if (ip
== vlan
->vlan_ip
)
2292 * We go to the (large) trouble of VLAN tagging ARP frames because
2293 * switches in VLAN mode (especially if ports are configured as
2294 * "native" to a VLAN) might not pass non-tagged frames.
2296 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2298 struct sk_buff
*skb
;
2300 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2301 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2303 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2304 NULL
, slave_dev
->dev_addr
, NULL
);
2307 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2311 skb
= vlan_put_tag(skb
, vlan_id
);
2313 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2321 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2324 __be32
*targets
= bond
->params
.arp_targets
;
2325 struct vlan_entry
*vlan
, *vlan_next
;
2326 struct net_device
*vlan_dev
;
2330 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2333 dprintk("basa: target %x\n", targets
[i
]);
2334 if (list_empty(&bond
->vlan_list
)) {
2335 dprintk("basa: empty vlan: arp_send\n");
2336 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2337 bond
->master_ip
, 0);
2342 * If VLANs are configured, we do a route lookup to
2343 * determine which VLAN interface would be used, so we
2344 * can tag the ARP with the proper VLAN tag.
2346 memset(&fl
, 0, sizeof(fl
));
2347 fl
.fl4_dst
= targets
[i
];
2348 fl
.fl4_tos
= RTO_ONLINK
;
2350 rv
= ip_route_output_key(&rt
, &fl
);
2352 if (net_ratelimit()) {
2353 printk(KERN_WARNING DRV_NAME
2354 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2355 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2361 * This target is not on a VLAN
2363 if (rt
->u
.dst
.dev
== bond
->dev
) {
2365 dprintk("basa: rtdev == bond->dev: arp_send\n");
2366 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2367 bond
->master_ip
, 0);
2372 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2374 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2375 if (vlan_dev
== rt
->u
.dst
.dev
) {
2376 vlan_id
= vlan
->vlan_id
;
2377 dprintk("basa: vlan match on %s %d\n",
2378 vlan_dev
->name
, vlan_id
);
2385 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2386 vlan
->vlan_ip
, vlan_id
);
2390 if (net_ratelimit()) {
2391 printk(KERN_WARNING DRV_NAME
2392 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2393 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2394 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2401 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2402 * for each VLAN above us.
2404 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2406 struct slave
*slave
= bond
->curr_active_slave
;
2407 struct vlan_entry
*vlan
;
2408 struct net_device
*vlan_dev
;
2410 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2411 slave
? slave
->dev
->name
: "NULL");
2415 if (bond
->master_ip
) {
2416 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2417 bond
->master_ip
, 0);
2420 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2421 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2422 if (vlan
->vlan_ip
) {
2423 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2424 vlan
->vlan_ip
, vlan
->vlan_id
);
2429 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2432 __be32
*targets
= bond
->params
.arp_targets
;
2434 targets
= bond
->params
.arp_targets
;
2435 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2436 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2437 "%u.%u.%u.%u bhti(tip) %d\n",
2438 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2439 bond_has_this_ip(bond
, tip
));
2440 if (sip
== targets
[i
]) {
2441 if (bond_has_this_ip(bond
, tip
))
2442 slave
->last_arp_rx
= jiffies
;
2448 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2451 struct slave
*slave
;
2452 struct bonding
*bond
;
2453 unsigned char *arp_ptr
;
2456 if (dev
->nd_net
!= &init_net
)
2459 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2463 read_lock(&bond
->lock
);
2465 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2466 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2467 orig_dev
? orig_dev
->name
: "NULL");
2469 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2470 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2473 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2474 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2475 (2 * dev
->addr_len
) +
2476 (2 * sizeof(u32
)))))
2480 if (arp
->ar_hln
!= dev
->addr_len
||
2481 skb
->pkt_type
== PACKET_OTHERHOST
||
2482 skb
->pkt_type
== PACKET_LOOPBACK
||
2483 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2484 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2488 arp_ptr
= (unsigned char *)(arp
+ 1);
2489 arp_ptr
+= dev
->addr_len
;
2490 memcpy(&sip
, arp_ptr
, 4);
2491 arp_ptr
+= 4 + dev
->addr_len
;
2492 memcpy(&tip
, arp_ptr
, 4);
2494 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2495 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2496 slave
->state
, bond
->params
.arp_validate
,
2497 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2500 * Backup slaves won't see the ARP reply, but do come through
2501 * here for each ARP probe (so we swap the sip/tip to validate
2502 * the probe). In a "redundant switch, common router" type of
2503 * configuration, the ARP probe will (hopefully) travel from
2504 * the active, through one switch, the router, then the other
2505 * switch before reaching the backup.
2507 if (slave
->state
== BOND_STATE_ACTIVE
)
2508 bond_validate_arp(bond
, slave
, sip
, tip
);
2510 bond_validate_arp(bond
, slave
, tip
, sip
);
2513 read_unlock(&bond
->lock
);
2516 return NET_RX_SUCCESS
;
2520 * this function is called regularly to monitor each slave's link
2521 * ensuring that traffic is being sent and received when arp monitoring
2522 * is used in load-balancing mode. if the adapter has been dormant, then an
2523 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2524 * arp monitoring in active backup mode.
2526 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2528 struct bonding
*bond
= bond_dev
->priv
;
2529 struct slave
*slave
, *oldcurrent
;
2530 int do_failover
= 0;
2534 read_lock(&bond
->lock
);
2536 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2538 if (bond
->kill_timers
) {
2542 if (bond
->slave_cnt
== 0) {
2546 read_lock(&bond
->curr_slave_lock
);
2547 oldcurrent
= bond
->curr_active_slave
;
2548 read_unlock(&bond
->curr_slave_lock
);
2550 /* see if any of the previous devices are up now (i.e. they have
2551 * xmt and rcv traffic). the curr_active_slave does not come into
2552 * the picture unless it is null. also, slave->jiffies is not needed
2553 * here because we send an arp on each slave and give a slave as
2554 * long as it needs to get the tx/rx within the delta.
2555 * TODO: what about up/down delay in arp mode? it wasn't here before
2558 bond_for_each_slave(bond
, slave
, i
) {
2559 if (slave
->link
!= BOND_LINK_UP
) {
2560 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2561 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2563 slave
->link
= BOND_LINK_UP
;
2564 slave
->state
= BOND_STATE_ACTIVE
;
2566 /* primary_slave has no meaning in round-robin
2567 * mode. the window of a slave being up and
2568 * curr_active_slave being null after enslaving
2572 printk(KERN_INFO DRV_NAME
2573 ": %s: link status definitely "
2574 "up for interface %s, ",
2579 printk(KERN_INFO DRV_NAME
2580 ": %s: interface %s is now up\n",
2586 /* slave->link == BOND_LINK_UP */
2588 /* not all switches will respond to an arp request
2589 * when the source ip is 0, so don't take the link down
2590 * if we don't know our ip yet
2592 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2593 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2594 bond_has_ip(bond
))) {
2596 slave
->link
= BOND_LINK_DOWN
;
2597 slave
->state
= BOND_STATE_BACKUP
;
2599 if (slave
->link_failure_count
< UINT_MAX
) {
2600 slave
->link_failure_count
++;
2603 printk(KERN_INFO DRV_NAME
2604 ": %s: interface %s is now down.\n",
2608 if (slave
== oldcurrent
) {
2614 /* note: if switch is in round-robin mode, all links
2615 * must tx arp to ensure all links rx an arp - otherwise
2616 * links may oscillate or not come up at all; if switch is
2617 * in something like xor mode, there is nothing we can
2618 * do - all replies will be rx'ed on same link causing slaves
2619 * to be unstable during low/no traffic periods
2621 if (IS_UP(slave
->dev
)) {
2622 bond_arp_send_all(bond
, slave
);
2627 write_lock(&bond
->curr_slave_lock
);
2629 bond_select_active_slave(bond
);
2631 write_unlock(&bond
->curr_slave_lock
);
2635 if (bond
->params
.arp_interval
) {
2636 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2639 read_unlock(&bond
->lock
);
2643 * When using arp monitoring in active-backup mode, this function is
2644 * called to determine if any backup slaves have went down or a new
2645 * current slave needs to be found.
2646 * The backup slaves never generate traffic, they are considered up by merely
2647 * receiving traffic. If the current slave goes down, each backup slave will
2648 * be given the opportunity to tx/rx an arp before being taken down - this
2649 * prevents all slaves from being taken down due to the current slave not
2650 * sending any traffic for the backups to receive. The arps are not necessarily
2651 * necessary, any tx and rx traffic will keep the current slave up. While any
2652 * rx traffic will keep the backup slaves up, the current slave is responsible
2653 * for generating traffic to keep them up regardless of any other traffic they
2654 * may have received.
2655 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2657 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2659 struct bonding
*bond
= bond_dev
->priv
;
2660 struct slave
*slave
;
2664 read_lock(&bond
->lock
);
2666 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2668 if (bond
->kill_timers
) {
2672 if (bond
->slave_cnt
== 0) {
2676 /* determine if any slave has come up or any backup slave has
2678 * TODO: what about up/down delay in arp mode? it wasn't here before
2681 bond_for_each_slave(bond
, slave
, i
) {
2682 if (slave
->link
!= BOND_LINK_UP
) {
2683 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2686 slave
->link
= BOND_LINK_UP
;
2688 write_lock(&bond
->curr_slave_lock
);
2690 if ((!bond
->curr_active_slave
) &&
2691 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2692 bond_change_active_slave(bond
, slave
);
2693 bond
->current_arp_slave
= NULL
;
2694 } else if (bond
->curr_active_slave
!= slave
) {
2695 /* this slave has just come up but we
2696 * already have a current slave; this
2697 * can also happen if bond_enslave adds
2698 * a new slave that is up while we are
2699 * searching for a new slave
2701 bond_set_slave_inactive_flags(slave
);
2702 bond
->current_arp_slave
= NULL
;
2705 bond_set_carrier(bond
);
2707 if (slave
== bond
->curr_active_slave
) {
2708 printk(KERN_INFO DRV_NAME
2709 ": %s: %s is up and now the "
2710 "active interface\n",
2713 netif_carrier_on(bond
->dev
);
2715 printk(KERN_INFO DRV_NAME
2716 ": %s: backup interface %s is "
2722 write_unlock(&bond
->curr_slave_lock
);
2725 read_lock(&bond
->curr_slave_lock
);
2727 if ((slave
!= bond
->curr_active_slave
) &&
2728 (!bond
->current_arp_slave
) &&
2729 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2730 bond_has_ip(bond
))) {
2731 /* a backup slave has gone down; three times
2732 * the delta allows the current slave to be
2733 * taken out before the backup slave.
2734 * note: a non-null current_arp_slave indicates
2735 * the curr_active_slave went down and we are
2736 * searching for a new one; under this
2737 * condition we only take the curr_active_slave
2738 * down - this gives each slave a chance to
2739 * tx/rx traffic before being taken out
2742 read_unlock(&bond
->curr_slave_lock
);
2744 slave
->link
= BOND_LINK_DOWN
;
2746 if (slave
->link_failure_count
< UINT_MAX
) {
2747 slave
->link_failure_count
++;
2750 bond_set_slave_inactive_flags(slave
);
2752 printk(KERN_INFO DRV_NAME
2753 ": %s: backup interface %s is now down\n",
2757 read_unlock(&bond
->curr_slave_lock
);
2762 read_lock(&bond
->curr_slave_lock
);
2763 slave
= bond
->curr_active_slave
;
2764 read_unlock(&bond
->curr_slave_lock
);
2767 /* if we have sent traffic in the past 2*arp_intervals but
2768 * haven't xmit and rx traffic in that time interval, select
2769 * a different slave. slave->jiffies is only updated when
2770 * a slave first becomes the curr_active_slave - not necessarily
2771 * after every arp; this ensures the slave has a full 2*delta
2772 * before being taken out. if a primary is being used, check
2773 * if it is up and needs to take over as the curr_active_slave
2775 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2776 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2777 bond_has_ip(bond
))) &&
2778 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2780 slave
->link
= BOND_LINK_DOWN
;
2782 if (slave
->link_failure_count
< UINT_MAX
) {
2783 slave
->link_failure_count
++;
2786 printk(KERN_INFO DRV_NAME
2787 ": %s: link status down for active interface "
2788 "%s, disabling it\n",
2792 write_lock(&bond
->curr_slave_lock
);
2794 bond_select_active_slave(bond
);
2795 slave
= bond
->curr_active_slave
;
2797 write_unlock(&bond
->curr_slave_lock
);
2799 bond
->current_arp_slave
= slave
;
2802 slave
->jiffies
= jiffies
;
2804 } else if ((bond
->primary_slave
) &&
2805 (bond
->primary_slave
!= slave
) &&
2806 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2807 /* at this point, slave is the curr_active_slave */
2808 printk(KERN_INFO DRV_NAME
2809 ": %s: changing from interface %s to primary "
2813 bond
->primary_slave
->dev
->name
);
2815 /* primary is up so switch to it */
2816 write_lock(&bond
->curr_slave_lock
);
2817 bond_change_active_slave(bond
, bond
->primary_slave
);
2818 write_unlock(&bond
->curr_slave_lock
);
2820 slave
= bond
->primary_slave
;
2821 slave
->jiffies
= jiffies
;
2823 bond
->current_arp_slave
= NULL
;
2826 /* the current slave must tx an arp to ensure backup slaves
2829 if (slave
&& bond_has_ip(bond
)) {
2830 bond_arp_send_all(bond
, slave
);
2834 /* if we don't have a curr_active_slave, search for the next available
2835 * backup slave from the current_arp_slave and make it the candidate
2836 * for becoming the curr_active_slave
2839 if (!bond
->current_arp_slave
) {
2840 bond
->current_arp_slave
= bond
->first_slave
;
2843 if (bond
->current_arp_slave
) {
2844 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2846 /* search for next candidate */
2847 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2848 if (IS_UP(slave
->dev
)) {
2849 slave
->link
= BOND_LINK_BACK
;
2850 bond_set_slave_active_flags(slave
);
2851 bond_arp_send_all(bond
, slave
);
2852 slave
->jiffies
= jiffies
;
2853 bond
->current_arp_slave
= slave
;
2857 /* if the link state is up at this point, we
2858 * mark it down - this can happen if we have
2859 * simultaneous link failures and
2860 * reselect_active_interface doesn't make this
2861 * one the current slave so it is still marked
2862 * up when it is actually down
2864 if (slave
->link
== BOND_LINK_UP
) {
2865 slave
->link
= BOND_LINK_DOWN
;
2866 if (slave
->link_failure_count
< UINT_MAX
) {
2867 slave
->link_failure_count
++;
2870 bond_set_slave_inactive_flags(slave
);
2872 printk(KERN_INFO DRV_NAME
2873 ": %s: backup interface %s is "
2883 if (bond
->params
.arp_interval
) {
2884 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2887 read_unlock(&bond
->lock
);
2890 /*------------------------------ proc/seq_file-------------------------------*/
2892 #ifdef CONFIG_PROC_FS
2894 #define SEQ_START_TOKEN ((void *)1)
2896 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2898 struct bonding
*bond
= seq
->private;
2900 struct slave
*slave
;
2903 /* make sure the bond won't be taken away */
2904 read_lock(&dev_base_lock
);
2905 read_lock_bh(&bond
->lock
);
2908 return SEQ_START_TOKEN
;
2911 bond_for_each_slave(bond
, slave
, i
) {
2912 if (++off
== *pos
) {
2920 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2922 struct bonding
*bond
= seq
->private;
2923 struct slave
*slave
= v
;
2926 if (v
== SEQ_START_TOKEN
) {
2927 return bond
->first_slave
;
2930 slave
= slave
->next
;
2932 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2935 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2937 struct bonding
*bond
= seq
->private;
2939 read_unlock_bh(&bond
->lock
);
2940 read_unlock(&dev_base_lock
);
2943 static void bond_info_show_master(struct seq_file
*seq
)
2945 struct bonding
*bond
= seq
->private;
2950 read_lock(&bond
->curr_slave_lock
);
2951 curr
= bond
->curr_active_slave
;
2952 read_unlock(&bond
->curr_slave_lock
);
2954 seq_printf(seq
, "Bonding Mode: %s\n",
2955 bond_mode_name(bond
->params
.mode
));
2957 if (bond
->params
.mode
== BOND_MODE_XOR
||
2958 bond
->params
.mode
== BOND_MODE_8023AD
) {
2959 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2960 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2961 bond
->params
.xmit_policy
);
2964 if (USES_PRIMARY(bond
->params
.mode
)) {
2965 seq_printf(seq
, "Primary Slave: %s\n",
2966 (bond
->primary_slave
) ?
2967 bond
->primary_slave
->dev
->name
: "None");
2969 seq_printf(seq
, "Currently Active Slave: %s\n",
2970 (curr
) ? curr
->dev
->name
: "None");
2973 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
2975 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
2976 seq_printf(seq
, "Up Delay (ms): %d\n",
2977 bond
->params
.updelay
* bond
->params
.miimon
);
2978 seq_printf(seq
, "Down Delay (ms): %d\n",
2979 bond
->params
.downdelay
* bond
->params
.miimon
);
2982 /* ARP information */
2983 if(bond
->params
.arp_interval
> 0) {
2985 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
2986 bond
->params
.arp_interval
);
2988 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
2990 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
2991 if (!bond
->params
.arp_targets
[i
])
2994 seq_printf(seq
, ",");
2995 target
= ntohl(bond
->params
.arp_targets
[i
]);
2996 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
2999 seq_printf(seq
, "\n");
3002 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3003 struct ad_info ad_info
;
3004 DECLARE_MAC_BUF(mac
);
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: %s\n",
3025 print_mac(mac
, ad_info
.partner_system
));
3030 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3032 struct bonding
*bond
= seq
->private;
3033 DECLARE_MAC_BUF(mac
);
3035 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3036 seq_printf(seq
, "MII Status: %s\n",
3037 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3038 seq_printf(seq
, "Link Failure Count: %u\n",
3039 slave
->link_failure_count
);
3042 "Permanent HW addr: %s\n",
3043 print_mac(mac
, slave
->perm_hwaddr
));
3045 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3046 const struct aggregator
*agg
3047 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3050 seq_printf(seq
, "Aggregator ID: %d\n",
3051 agg
->aggregator_identifier
);
3053 seq_puts(seq
, "Aggregator ID: N/A\n");
3058 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3060 if (v
== SEQ_START_TOKEN
) {
3061 seq_printf(seq
, "%s\n", version
);
3062 bond_info_show_master(seq
);
3064 bond_info_show_slave(seq
, v
);
3070 static struct seq_operations bond_info_seq_ops
= {
3071 .start
= bond_info_seq_start
,
3072 .next
= bond_info_seq_next
,
3073 .stop
= bond_info_seq_stop
,
3074 .show
= bond_info_seq_show
,
3077 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3079 struct seq_file
*seq
;
3080 struct proc_dir_entry
*proc
;
3083 res
= seq_open(file
, &bond_info_seq_ops
);
3085 /* recover the pointer buried in proc_dir_entry data */
3086 seq
= file
->private_data
;
3088 seq
->private = proc
->data
;
3094 static const struct file_operations bond_info_fops
= {
3095 .owner
= THIS_MODULE
,
3096 .open
= bond_info_open
,
3098 .llseek
= seq_lseek
,
3099 .release
= seq_release
,
3102 static int bond_create_proc_entry(struct bonding
*bond
)
3104 struct net_device
*bond_dev
= bond
->dev
;
3106 if (bond_proc_dir
) {
3107 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3110 if (bond
->proc_entry
== NULL
) {
3111 printk(KERN_WARNING DRV_NAME
3112 ": Warning: Cannot create /proc/net/%s/%s\n",
3113 DRV_NAME
, bond_dev
->name
);
3115 bond
->proc_entry
->data
= bond
;
3116 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3117 bond
->proc_entry
->owner
= THIS_MODULE
;
3118 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3125 static void bond_remove_proc_entry(struct bonding
*bond
)
3127 if (bond_proc_dir
&& bond
->proc_entry
) {
3128 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3129 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3130 bond
->proc_entry
= NULL
;
3134 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3135 * Caller must hold rtnl_lock.
3137 static void bond_create_proc_dir(void)
3139 int len
= strlen(DRV_NAME
);
3141 for (bond_proc_dir
= init_net
.proc_net
->subdir
; bond_proc_dir
;
3142 bond_proc_dir
= bond_proc_dir
->next
) {
3143 if ((bond_proc_dir
->namelen
== len
) &&
3144 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3149 if (!bond_proc_dir
) {
3150 bond_proc_dir
= proc_mkdir(DRV_NAME
, init_net
.proc_net
);
3151 if (bond_proc_dir
) {
3152 bond_proc_dir
->owner
= THIS_MODULE
;
3154 printk(KERN_WARNING DRV_NAME
3155 ": Warning: cannot create /proc/net/%s\n",
3161 /* Destroy the bonding directory under /proc/net, if empty.
3162 * Caller must hold rtnl_lock.
3164 static void bond_destroy_proc_dir(void)
3166 struct proc_dir_entry
*de
;
3168 if (!bond_proc_dir
) {
3172 /* verify that the /proc dir is empty */
3173 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3174 /* ignore . and .. */
3175 if (*(de
->name
) != '.') {
3181 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3182 bond_proc_dir
->owner
= NULL
;
3185 remove_proc_entry(DRV_NAME
, init_net
.proc_net
);
3186 bond_proc_dir
= NULL
;
3189 #endif /* CONFIG_PROC_FS */
3191 /*-------------------------- netdev event handling --------------------------*/
3194 * Change device name
3196 static int bond_event_changename(struct bonding
*bond
)
3198 #ifdef CONFIG_PROC_FS
3199 bond_remove_proc_entry(bond
);
3200 bond_create_proc_entry(bond
);
3202 down_write(&(bonding_rwsem
));
3203 bond_destroy_sysfs_entry(bond
);
3204 bond_create_sysfs_entry(bond
);
3205 up_write(&(bonding_rwsem
));
3209 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3211 struct bonding
*event_bond
= bond_dev
->priv
;
3214 case NETDEV_CHANGENAME
:
3215 return bond_event_changename(event_bond
);
3216 case NETDEV_UNREGISTER
:
3218 * TODO: remove a bond from the list?
3228 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3230 struct net_device
*bond_dev
= slave_dev
->master
;
3231 struct bonding
*bond
= bond_dev
->priv
;
3234 case NETDEV_UNREGISTER
:
3236 bond_release(bond_dev
, slave_dev
);
3241 * TODO: is this what we get if somebody
3242 * sets up a hierarchical bond, then rmmod's
3243 * one of the slave bonding devices?
3248 * ... Or is it this?
3251 case NETDEV_CHANGEMTU
:
3253 * TODO: Should slaves be allowed to
3254 * independently alter their MTU? For
3255 * an active-backup bond, slaves need
3256 * not be the same type of device, so
3257 * MTUs may vary. For other modes,
3258 * slaves arguably should have the
3259 * same MTUs. To do this, we'd need to
3260 * take over the slave's change_mtu
3261 * function for the duration of their
3265 case NETDEV_CHANGENAME
:
3267 * TODO: handle changing the primary's name
3270 case NETDEV_FEAT_CHANGE
:
3271 bond_compute_features(bond
);
3281 * bond_netdev_event: handle netdev notifier chain events.
3283 * This function receives events for the netdev chain. The caller (an
3284 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3285 * locks for us to safely manipulate the slave devices (RTNL lock,
3288 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3290 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3292 if (event_dev
->nd_net
!= &init_net
)
3295 dprintk("event_dev: %s, event: %lx\n",
3296 (event_dev
? event_dev
->name
: "None"),
3299 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3302 if (event_dev
->flags
& IFF_MASTER
) {
3303 dprintk("IFF_MASTER\n");
3304 return bond_master_netdev_event(event
, event_dev
);
3307 if (event_dev
->flags
& IFF_SLAVE
) {
3308 dprintk("IFF_SLAVE\n");
3309 return bond_slave_netdev_event(event
, event_dev
);
3316 * bond_inetaddr_event: handle inetaddr notifier chain events.
3318 * We keep track of device IPs primarily to use as source addresses in
3319 * ARP monitor probes (rather than spewing out broadcasts all the time).
3321 * We track one IP for the main device (if it has one), plus one per VLAN.
3323 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3325 struct in_ifaddr
*ifa
= ptr
;
3326 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3327 struct bonding
*bond
, *bond_next
;
3328 struct vlan_entry
*vlan
, *vlan_next
;
3330 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3331 if (bond
->dev
== event_dev
) {
3334 bond
->master_ip
= ifa
->ifa_local
;
3337 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3344 if (list_empty(&bond
->vlan_list
))
3347 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3349 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3350 if (vlan_dev
== event_dev
) {
3353 vlan
->vlan_ip
= ifa
->ifa_local
;
3357 bond_glean_dev_ip(vlan_dev
);
3368 static struct notifier_block bond_netdev_notifier
= {
3369 .notifier_call
= bond_netdev_event
,
3372 static struct notifier_block bond_inetaddr_notifier
= {
3373 .notifier_call
= bond_inetaddr_event
,
3376 /*-------------------------- Packet type handling ---------------------------*/
3378 /* register to receive lacpdus on a bond */
3379 static void bond_register_lacpdu(struct bonding
*bond
)
3381 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3383 /* initialize packet type */
3384 pk_type
->type
= PKT_TYPE_LACPDU
;
3385 pk_type
->dev
= bond
->dev
;
3386 pk_type
->func
= bond_3ad_lacpdu_recv
;
3388 dev_add_pack(pk_type
);
3391 /* unregister to receive lacpdus on a bond */
3392 static void bond_unregister_lacpdu(struct bonding
*bond
)
3394 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3397 void bond_register_arp(struct bonding
*bond
)
3399 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3404 pt
->type
= htons(ETH_P_ARP
);
3405 pt
->dev
= bond
->dev
;
3406 pt
->func
= bond_arp_rcv
;
3410 void bond_unregister_arp(struct bonding
*bond
)
3412 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3414 dev_remove_pack(pt
);
3418 /*---------------------------- Hashing Policies -----------------------------*/
3421 * Hash for the output device based upon layer 3 and layer 4 data. If
3422 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3423 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3425 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3426 struct net_device
*bond_dev
, int count
)
3428 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3429 struct iphdr
*iph
= ip_hdr(skb
);
3430 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3433 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3434 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3435 (iph
->protocol
== IPPROTO_TCP
||
3436 iph
->protocol
== IPPROTO_UDP
)) {
3437 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3439 return (layer4_xor
^
3440 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3444 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3448 * Hash for the output device based upon layer 2 data
3450 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3451 struct net_device
*bond_dev
, int count
)
3453 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3455 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3458 /*-------------------------- Device entry points ----------------------------*/
3460 static int bond_open(struct net_device
*bond_dev
)
3462 struct bonding
*bond
= bond_dev
->priv
;
3463 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3464 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3466 bond
->kill_timers
= 0;
3468 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3469 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3470 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3472 /* bond_alb_initialize must be called before the timer
3475 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3476 /* something went wrong - fail the open operation */
3480 init_timer(alb_timer
);
3481 alb_timer
->expires
= jiffies
+ 1;
3482 alb_timer
->data
= (unsigned long)bond
;
3483 alb_timer
->function
= (void *)&bond_alb_monitor
;
3484 add_timer(alb_timer
);
3487 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3488 init_timer(mii_timer
);
3489 mii_timer
->expires
= jiffies
+ 1;
3490 mii_timer
->data
= (unsigned long)bond_dev
;
3491 mii_timer
->function
= (void *)&bond_mii_monitor
;
3492 add_timer(mii_timer
);
3495 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3496 init_timer(arp_timer
);
3497 arp_timer
->expires
= jiffies
+ 1;
3498 arp_timer
->data
= (unsigned long)bond_dev
;
3499 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3500 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3502 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3504 if (bond
->params
.arp_validate
)
3505 bond_register_arp(bond
);
3507 add_timer(arp_timer
);
3510 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3511 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3512 init_timer(ad_timer
);
3513 ad_timer
->expires
= jiffies
+ 1;
3514 ad_timer
->data
= (unsigned long)bond
;
3515 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3516 add_timer(ad_timer
);
3518 /* register to receive LACPDUs */
3519 bond_register_lacpdu(bond
);
3525 static int bond_close(struct net_device
*bond_dev
)
3527 struct bonding
*bond
= bond_dev
->priv
;
3529 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3530 /* Unregister the receive of LACPDUs */
3531 bond_unregister_lacpdu(bond
);
3534 if (bond
->params
.arp_validate
)
3535 bond_unregister_arp(bond
);
3537 write_lock_bh(&bond
->lock
);
3540 /* signal timers not to re-arm */
3541 bond
->kill_timers
= 1;
3543 write_unlock_bh(&bond
->lock
);
3545 /* del_timer_sync must run without holding the bond->lock
3546 * because a running timer might be trying to hold it too
3549 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3550 del_timer_sync(&bond
->mii_timer
);
3553 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3554 del_timer_sync(&bond
->arp_timer
);
3557 switch (bond
->params
.mode
) {
3558 case BOND_MODE_8023AD
:
3559 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3563 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3570 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3571 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3572 /* Must be called only after all
3573 * slaves have been released
3575 bond_alb_deinitialize(bond
);
3581 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3583 struct bonding
*bond
= bond_dev
->priv
;
3584 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3585 struct slave
*slave
;
3588 memset(stats
, 0, sizeof(struct net_device_stats
));
3590 read_lock_bh(&bond
->lock
);
3592 bond_for_each_slave(bond
, slave
, i
) {
3593 sstats
= slave
->dev
->get_stats(slave
->dev
);
3594 stats
->rx_packets
+= sstats
->rx_packets
;
3595 stats
->rx_bytes
+= sstats
->rx_bytes
;
3596 stats
->rx_errors
+= sstats
->rx_errors
;
3597 stats
->rx_dropped
+= sstats
->rx_dropped
;
3599 stats
->tx_packets
+= sstats
->tx_packets
;
3600 stats
->tx_bytes
+= sstats
->tx_bytes
;
3601 stats
->tx_errors
+= sstats
->tx_errors
;
3602 stats
->tx_dropped
+= sstats
->tx_dropped
;
3604 stats
->multicast
+= sstats
->multicast
;
3605 stats
->collisions
+= sstats
->collisions
;
3607 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3608 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3609 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3610 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3611 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3612 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3614 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3615 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3616 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3617 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3618 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3621 read_unlock_bh(&bond
->lock
);
3626 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3628 struct net_device
*slave_dev
= NULL
;
3629 struct ifbond k_binfo
;
3630 struct ifbond __user
*u_binfo
= NULL
;
3631 struct ifslave k_sinfo
;
3632 struct ifslave __user
*u_sinfo
= NULL
;
3633 struct mii_ioctl_data
*mii
= NULL
;
3636 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3637 bond_dev
->name
, cmd
);
3649 * We do this again just in case we were called by SIOCGMIIREG
3650 * instead of SIOCGMIIPHY.
3657 if (mii
->reg_num
== 1) {
3658 struct bonding
*bond
= bond_dev
->priv
;
3660 read_lock_bh(&bond
->lock
);
3661 read_lock(&bond
->curr_slave_lock
);
3662 if (netif_carrier_ok(bond
->dev
)) {
3663 mii
->val_out
= BMSR_LSTATUS
;
3665 read_unlock(&bond
->curr_slave_lock
);
3666 read_unlock_bh(&bond
->lock
);
3670 case BOND_INFO_QUERY_OLD
:
3671 case SIOCBONDINFOQUERY
:
3672 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3674 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3678 res
= bond_info_query(bond_dev
, &k_binfo
);
3680 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3686 case BOND_SLAVE_INFO_QUERY_OLD
:
3687 case SIOCBONDSLAVEINFOQUERY
:
3688 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3690 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3694 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3696 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3707 if (!capable(CAP_NET_ADMIN
)) {
3711 down_write(&(bonding_rwsem
));
3712 slave_dev
= dev_get_by_name(&init_net
, ifr
->ifr_slave
);
3714 dprintk("slave_dev=%p: \n", slave_dev
);
3719 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3721 case BOND_ENSLAVE_OLD
:
3722 case SIOCBONDENSLAVE
:
3723 res
= bond_enslave(bond_dev
, slave_dev
);
3725 case BOND_RELEASE_OLD
:
3726 case SIOCBONDRELEASE
:
3727 res
= bond_release(bond_dev
, slave_dev
);
3729 case BOND_SETHWADDR_OLD
:
3730 case SIOCBONDSETHWADDR
:
3731 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3733 case BOND_CHANGE_ACTIVE_OLD
:
3734 case SIOCBONDCHANGEACTIVE
:
3735 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3744 up_write(&(bonding_rwsem
));
3748 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3750 struct bonding
*bond
= bond_dev
->priv
;
3751 struct dev_mc_list
*dmi
;
3753 write_lock_bh(&bond
->lock
);
3756 * Do promisc before checking multicast_mode
3758 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3759 bond_set_promiscuity(bond
, 1);
3762 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3763 bond_set_promiscuity(bond
, -1);
3766 /* set allmulti flag to slaves */
3767 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3768 bond_set_allmulti(bond
, 1);
3771 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3772 bond_set_allmulti(bond
, -1);
3775 bond
->flags
= bond_dev
->flags
;
3777 /* looking for addresses to add to slaves' mc list */
3778 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3779 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3780 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3784 /* looking for addresses to delete from slaves' list */
3785 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3786 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3787 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3791 /* save master's multicast list */
3792 bond_mc_list_destroy(bond
);
3793 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3795 write_unlock_bh(&bond
->lock
);
3799 * Change the MTU of all of a master's slaves to match the master
3801 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3803 struct bonding
*bond
= bond_dev
->priv
;
3804 struct slave
*slave
, *stop_at
;
3808 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3809 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3811 /* Can't hold bond->lock with bh disabled here since
3812 * some base drivers panic. On the other hand we can't
3813 * hold bond->lock without bh disabled because we'll
3814 * deadlock. The only solution is to rely on the fact
3815 * that we're under rtnl_lock here, and the slaves
3816 * list won't change. This doesn't solve the problem
3817 * of setting the slave's MTU while it is
3818 * transmitting, but the assumption is that the base
3819 * driver can handle that.
3821 * TODO: figure out a way to safely iterate the slaves
3822 * list, but without holding a lock around the actual
3823 * call to the base driver.
3826 bond_for_each_slave(bond
, slave
, i
) {
3827 dprintk("s %p s->p %p c_m %p\n", slave
,
3828 slave
->prev
, slave
->dev
->change_mtu
);
3830 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3833 /* If we failed to set the slave's mtu to the new value
3834 * we must abort the operation even in ACTIVE_BACKUP
3835 * mode, because if we allow the backup slaves to have
3836 * different mtu values than the active slave we'll
3837 * need to change their mtu when doing a failover. That
3838 * means changing their mtu from timer context, which
3839 * is probably not a good idea.
3841 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3846 bond_dev
->mtu
= new_mtu
;
3851 /* unwind from head to the slave that failed */
3853 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3856 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3858 dprintk("unwind err %d dev %s\n", tmp_res
,
3869 * Note that many devices must be down to change the HW address, and
3870 * downing the master releases all slaves. We can make bonds full of
3871 * bonding devices to test this, however.
3873 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3875 struct bonding
*bond
= bond_dev
->priv
;
3876 struct sockaddr
*sa
= addr
, tmp_sa
;
3877 struct slave
*slave
, *stop_at
;
3881 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3883 if (!is_valid_ether_addr(sa
->sa_data
)) {
3884 return -EADDRNOTAVAIL
;
3887 /* Can't hold bond->lock with bh disabled here since
3888 * some base drivers panic. On the other hand we can't
3889 * hold bond->lock without bh disabled because we'll
3890 * deadlock. The only solution is to rely on the fact
3891 * that we're under rtnl_lock here, and the slaves
3892 * list won't change. This doesn't solve the problem
3893 * of setting the slave's hw address while it is
3894 * transmitting, but the assumption is that the base
3895 * driver can handle that.
3897 * TODO: figure out a way to safely iterate the slaves
3898 * list, but without holding a lock around the actual
3899 * call to the base driver.
3902 bond_for_each_slave(bond
, slave
, i
) {
3903 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3905 if (slave
->dev
->set_mac_address
== NULL
) {
3907 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3911 res
= dev_set_mac_address(slave
->dev
, addr
);
3913 /* TODO: consider downing the slave
3915 * User should expect communications
3916 * breakage anyway until ARP finish
3919 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3925 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3929 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3930 tmp_sa
.sa_family
= bond_dev
->type
;
3932 /* unwind from head to the slave that failed */
3934 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3937 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3939 dprintk("unwind err %d dev %s\n", tmp_res
,
3947 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3949 struct bonding
*bond
= bond_dev
->priv
;
3950 struct slave
*slave
, *start_at
;
3954 read_lock(&bond
->lock
);
3956 if (!BOND_IS_OK(bond
)) {
3960 read_lock(&bond
->curr_slave_lock
);
3961 slave
= start_at
= bond
->curr_active_slave
;
3962 read_unlock(&bond
->curr_slave_lock
);
3968 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3969 if (IS_UP(slave
->dev
) &&
3970 (slave
->link
== BOND_LINK_UP
) &&
3971 (slave
->state
== BOND_STATE_ACTIVE
)) {
3972 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3974 write_lock(&bond
->curr_slave_lock
);
3975 bond
->curr_active_slave
= slave
->next
;
3976 write_unlock(&bond
->curr_slave_lock
);
3985 /* no suitable interface, frame not sent */
3988 read_unlock(&bond
->lock
);
3994 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3995 * the bond has a usable interface.
3997 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3999 struct bonding
*bond
= bond_dev
->priv
;
4002 read_lock(&bond
->lock
);
4003 read_lock(&bond
->curr_slave_lock
);
4005 if (!BOND_IS_OK(bond
)) {
4009 if (!bond
->curr_active_slave
)
4012 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4016 /* no suitable interface, frame not sent */
4019 read_unlock(&bond
->curr_slave_lock
);
4020 read_unlock(&bond
->lock
);
4025 * In bond_xmit_xor() , we determine the output device by using a pre-
4026 * determined xmit_hash_policy(), If the selected device is not enabled,
4027 * find the next active slave.
4029 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4031 struct bonding
*bond
= bond_dev
->priv
;
4032 struct slave
*slave
, *start_at
;
4037 read_lock(&bond
->lock
);
4039 if (!BOND_IS_OK(bond
)) {
4043 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4045 bond_for_each_slave(bond
, slave
, i
) {
4054 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4055 if (IS_UP(slave
->dev
) &&
4056 (slave
->link
== BOND_LINK_UP
) &&
4057 (slave
->state
== BOND_STATE_ACTIVE
)) {
4058 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4065 /* no suitable interface, frame not sent */
4068 read_unlock(&bond
->lock
);
4073 * in broadcast mode, we send everything to all usable interfaces.
4075 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4077 struct bonding
*bond
= bond_dev
->priv
;
4078 struct slave
*slave
, *start_at
;
4079 struct net_device
*tx_dev
= NULL
;
4083 read_lock(&bond
->lock
);
4085 if (!BOND_IS_OK(bond
)) {
4089 read_lock(&bond
->curr_slave_lock
);
4090 start_at
= bond
->curr_active_slave
;
4091 read_unlock(&bond
->curr_slave_lock
);
4097 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4098 if (IS_UP(slave
->dev
) &&
4099 (slave
->link
== BOND_LINK_UP
) &&
4100 (slave
->state
== BOND_STATE_ACTIVE
)) {
4102 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4104 printk(KERN_ERR DRV_NAME
4105 ": %s: Error: bond_xmit_broadcast(): "
4106 "skb_clone() failed\n",
4111 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4113 dev_kfree_skb(skb2
);
4117 tx_dev
= slave
->dev
;
4122 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4127 /* no suitable interface, frame not sent */
4130 /* frame sent to all suitable interfaces */
4131 read_unlock(&bond
->lock
);
4135 /*------------------------- Device initialization ---------------------------*/
4138 * set bond mode specific net device operations
4140 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4142 struct net_device
*bond_dev
= bond
->dev
;
4145 case BOND_MODE_ROUNDROBIN
:
4146 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4148 case BOND_MODE_ACTIVEBACKUP
:
4149 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4152 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4153 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4154 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4156 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4158 case BOND_MODE_BROADCAST
:
4159 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4161 case BOND_MODE_8023AD
:
4162 bond_set_master_3ad_flags(bond
);
4163 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4164 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4165 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4167 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4170 bond_set_master_alb_flags(bond
);
4173 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4174 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4177 /* Should never happen, mode already checked */
4178 printk(KERN_ERR DRV_NAME
4179 ": %s: Error: Unknown bonding mode %d\n",
4186 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4187 struct ethtool_drvinfo
*drvinfo
)
4189 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4190 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4191 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4194 static const struct ethtool_ops bond_ethtool_ops
= {
4195 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4199 * Does not allocate but creates a /proc entry.
4202 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4204 struct bonding
*bond
= bond_dev
->priv
;
4206 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4208 /* initialize rwlocks */
4209 rwlock_init(&bond
->lock
);
4210 rwlock_init(&bond
->curr_slave_lock
);
4212 bond
->params
= *params
; /* copy params struct */
4214 /* Initialize pointers */
4215 bond
->first_slave
= NULL
;
4216 bond
->curr_active_slave
= NULL
;
4217 bond
->current_arp_slave
= NULL
;
4218 bond
->primary_slave
= NULL
;
4219 bond
->dev
= bond_dev
;
4220 INIT_LIST_HEAD(&bond
->vlan_list
);
4222 /* Initialize the device entry points */
4223 bond_dev
->open
= bond_open
;
4224 bond_dev
->stop
= bond_close
;
4225 bond_dev
->get_stats
= bond_get_stats
;
4226 bond_dev
->do_ioctl
= bond_do_ioctl
;
4227 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4228 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4229 bond_dev
->change_mtu
= bond_change_mtu
;
4230 bond_dev
->set_mac_address
= bond_set_mac_address
;
4232 bond_set_mode_ops(bond
, bond
->params
.mode
);
4234 bond_dev
->destructor
= free_netdev
;
4236 /* Initialize the device options */
4237 bond_dev
->tx_queue_len
= 0;
4238 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4239 bond_dev
->priv_flags
|= IFF_BONDING
;
4241 /* At first, we block adding VLANs. That's the only way to
4242 * prevent problems that occur when adding VLANs over an
4243 * empty bond. The block will be removed once non-challenged
4244 * slaves are enslaved.
4246 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4248 /* don't acquire bond device's netif_tx_lock when
4250 bond_dev
->features
|= NETIF_F_LLTX
;
4252 /* By default, we declare the bond to be fully
4253 * VLAN hardware accelerated capable. Special
4254 * care is taken in the various xmit functions
4255 * when there are slaves that are not hw accel
4258 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4259 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4260 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4261 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4262 NETIF_F_HW_VLAN_RX
|
4263 NETIF_F_HW_VLAN_FILTER
);
4265 #ifdef CONFIG_PROC_FS
4266 bond_create_proc_entry(bond
);
4269 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4274 /* De-initialize device specific data.
4275 * Caller must hold rtnl_lock.
4277 void bond_deinit(struct net_device
*bond_dev
)
4279 struct bonding
*bond
= bond_dev
->priv
;
4281 list_del(&bond
->bond_list
);
4283 #ifdef CONFIG_PROC_FS
4284 bond_remove_proc_entry(bond
);
4288 /* Unregister and free all bond devices.
4289 * Caller must hold rtnl_lock.
4291 static void bond_free_all(void)
4293 struct bonding
*bond
, *nxt
;
4295 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4296 struct net_device
*bond_dev
= bond
->dev
;
4298 bond_mc_list_destroy(bond
);
4299 /* Release the bonded slaves */
4300 bond_release_all(bond_dev
);
4301 bond_deinit(bond_dev
);
4302 unregister_netdevice(bond_dev
);
4305 #ifdef CONFIG_PROC_FS
4306 bond_destroy_proc_dir();
4310 /*------------------------- Module initialization ---------------------------*/
4313 * Convert string input module parms. Accept either the
4314 * number of the mode or its string name.
4316 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4320 for (i
= 0; tbl
[i
].modename
; i
++) {
4321 if ((isdigit(*mode_arg
) &&
4322 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4323 (strncmp(mode_arg
, tbl
[i
].modename
,
4324 strlen(tbl
[i
].modename
)) == 0)) {
4332 static int bond_check_params(struct bond_params
*params
)
4334 int arp_validate_value
;
4337 * Convert string parameters.
4340 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4341 if (bond_mode
== -1) {
4342 printk(KERN_ERR DRV_NAME
4343 ": Error: Invalid bonding mode \"%s\"\n",
4344 mode
== NULL
? "NULL" : mode
);
4349 if (xmit_hash_policy
) {
4350 if ((bond_mode
!= BOND_MODE_XOR
) &&
4351 (bond_mode
!= BOND_MODE_8023AD
)) {
4352 printk(KERN_INFO DRV_NAME
4353 ": xor_mode param is irrelevant in mode %s\n",
4354 bond_mode_name(bond_mode
));
4356 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4358 if (xmit_hashtype
== -1) {
4359 printk(KERN_ERR DRV_NAME
4360 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4361 xmit_hash_policy
== NULL
? "NULL" :
4369 if (bond_mode
!= BOND_MODE_8023AD
) {
4370 printk(KERN_INFO DRV_NAME
4371 ": lacp_rate param is irrelevant in mode %s\n",
4372 bond_mode_name(bond_mode
));
4374 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4375 if (lacp_fast
== -1) {
4376 printk(KERN_ERR DRV_NAME
4377 ": Error: Invalid lacp rate \"%s\"\n",
4378 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4384 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4385 printk(KERN_WARNING DRV_NAME
4386 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4387 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4388 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4389 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4393 printk(KERN_WARNING DRV_NAME
4394 ": Warning: miimon module parameter (%d), "
4395 "not in range 0-%d, so it was reset to %d\n",
4396 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4397 miimon
= BOND_LINK_MON_INTERV
;
4401 printk(KERN_WARNING DRV_NAME
4402 ": Warning: updelay module parameter (%d), "
4403 "not in range 0-%d, so it was reset to 0\n",
4408 if (downdelay
< 0) {
4409 printk(KERN_WARNING DRV_NAME
4410 ": Warning: downdelay module parameter (%d), "
4411 "not in range 0-%d, so it was reset to 0\n",
4412 downdelay
, INT_MAX
);
4416 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4417 printk(KERN_WARNING DRV_NAME
4418 ": Warning: use_carrier module parameter (%d), "
4419 "not of valid value (0/1), so it was set to 1\n",
4424 /* reset values for 802.3ad */
4425 if (bond_mode
== BOND_MODE_8023AD
) {
4427 printk(KERN_WARNING DRV_NAME
4428 ": Warning: miimon must be specified, "
4429 "otherwise bonding will not detect link "
4430 "failure, speed and duplex which are "
4431 "essential for 802.3ad operation\n");
4432 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4437 /* reset values for TLB/ALB */
4438 if ((bond_mode
== BOND_MODE_TLB
) ||
4439 (bond_mode
== BOND_MODE_ALB
)) {
4441 printk(KERN_WARNING DRV_NAME
4442 ": Warning: miimon must be specified, "
4443 "otherwise bonding will not detect link "
4444 "failure and link speed which are essential "
4445 "for TLB/ALB load balancing\n");
4446 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4451 if (bond_mode
== BOND_MODE_ALB
) {
4452 printk(KERN_NOTICE DRV_NAME
4453 ": In ALB mode you might experience client "
4454 "disconnections upon reconnection of a link if the "
4455 "bonding module updelay parameter (%d msec) is "
4456 "incompatible with the forwarding delay time of the "
4462 if (updelay
|| downdelay
) {
4463 /* just warn the user the up/down delay will have
4464 * no effect since miimon is zero...
4466 printk(KERN_WARNING DRV_NAME
4467 ": Warning: miimon module parameter not set "
4468 "and updelay (%d) or downdelay (%d) module "
4469 "parameter is set; updelay and downdelay have "
4470 "no effect unless miimon is set\n",
4471 updelay
, downdelay
);
4474 /* don't allow arp monitoring */
4476 printk(KERN_WARNING DRV_NAME
4477 ": Warning: miimon (%d) and arp_interval (%d) "
4478 "can't be used simultaneously, disabling ARP "
4480 miimon
, arp_interval
);
4484 if ((updelay
% miimon
) != 0) {
4485 printk(KERN_WARNING DRV_NAME
4486 ": Warning: updelay (%d) is not a multiple "
4487 "of miimon (%d), updelay rounded to %d ms\n",
4488 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4493 if ((downdelay
% miimon
) != 0) {
4494 printk(KERN_WARNING DRV_NAME
4495 ": Warning: downdelay (%d) is not a multiple "
4496 "of miimon (%d), downdelay rounded to %d ms\n",
4498 (downdelay
/ miimon
) * miimon
);
4501 downdelay
/= miimon
;
4504 if (arp_interval
< 0) {
4505 printk(KERN_WARNING DRV_NAME
4506 ": Warning: arp_interval module parameter (%d) "
4507 ", not in range 0-%d, so it was reset to %d\n",
4508 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4509 arp_interval
= BOND_LINK_ARP_INTERV
;
4512 for (arp_ip_count
= 0;
4513 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4515 /* not complete check, but should be good enough to
4517 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4518 printk(KERN_WARNING DRV_NAME
4519 ": Warning: bad arp_ip_target module parameter "
4520 "(%s), ARP monitoring will not be performed\n",
4521 arp_ip_target
[arp_ip_count
]);
4524 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4525 arp_target
[arp_ip_count
] = ip
;
4529 if (arp_interval
&& !arp_ip_count
) {
4530 /* don't allow arping if no arp_ip_target given... */
4531 printk(KERN_WARNING DRV_NAME
4532 ": Warning: arp_interval module parameter (%d) "
4533 "specified without providing an arp_ip_target "
4534 "parameter, arp_interval was reset to 0\n",
4540 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4541 printk(KERN_ERR DRV_NAME
4542 ": arp_validate only supported in active-backup mode\n");
4545 if (!arp_interval
) {
4546 printk(KERN_ERR DRV_NAME
4547 ": arp_validate requires arp_interval\n");
4551 arp_validate_value
= bond_parse_parm(arp_validate
,
4553 if (arp_validate_value
== -1) {
4554 printk(KERN_ERR DRV_NAME
4555 ": Error: invalid arp_validate \"%s\"\n",
4556 arp_validate
== NULL
? "NULL" : arp_validate
);
4560 arp_validate_value
= 0;
4563 printk(KERN_INFO DRV_NAME
4564 ": MII link monitoring set to %d ms\n",
4566 } else if (arp_interval
) {
4569 printk(KERN_INFO DRV_NAME
4570 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4572 arp_validate_tbl
[arp_validate_value
].modename
,
4575 for (i
= 0; i
< arp_ip_count
; i
++)
4576 printk (" %s", arp_ip_target
[i
]);
4581 /* miimon and arp_interval not set, we need one so things
4582 * work as expected, see bonding.txt for details
4584 printk(KERN_WARNING DRV_NAME
4585 ": Warning: either miimon or arp_interval and "
4586 "arp_ip_target module parameters must be specified, "
4587 "otherwise bonding will not detect link failures! see "
4588 "bonding.txt for details.\n");
4591 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4592 /* currently, using a primary only makes sense
4593 * in active backup, TLB or ALB modes
4595 printk(KERN_WARNING DRV_NAME
4596 ": Warning: %s primary device specified but has no "
4597 "effect in %s mode\n",
4598 primary
, bond_mode_name(bond_mode
));
4602 /* fill params struct with the proper values */
4603 params
->mode
= bond_mode
;
4604 params
->xmit_policy
= xmit_hashtype
;
4605 params
->miimon
= miimon
;
4606 params
->arp_interval
= arp_interval
;
4607 params
->arp_validate
= arp_validate_value
;
4608 params
->updelay
= updelay
;
4609 params
->downdelay
= downdelay
;
4610 params
->use_carrier
= use_carrier
;
4611 params
->lacp_fast
= lacp_fast
;
4612 params
->primary
[0] = 0;
4615 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4616 params
->primary
[IFNAMSIZ
- 1] = 0;
4619 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4624 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4626 /* Create a new bond based on the specified name and bonding parameters.
4627 * If name is NULL, obtain a suitable "bond%d" name for us.
4628 * Caller must NOT hold rtnl_lock; we need to release it here before we
4629 * set up our sysfs entries.
4631 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4633 struct net_device
*bond_dev
;
4637 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
4640 printk(KERN_ERR DRV_NAME
4641 ": %s: eek! can't alloc netdev!\n",
4648 res
= dev_alloc_name(bond_dev
, "bond%d");
4653 /* bond_init() must be called after dev_alloc_name() (for the
4654 * /proc files), but before register_netdevice(), because we
4655 * need to set function pointers.
4658 res
= bond_init(bond_dev
, params
);
4663 res
= register_netdevice(bond_dev
);
4668 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4671 *newbond
= bond_dev
->priv
;
4673 netif_carrier_off(bond_dev
);
4675 rtnl_unlock(); /* allows sysfs registration of net device */
4676 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4685 bond_deinit(bond_dev
);
4687 free_netdev(bond_dev
);
4693 static int __init
bonding_init(void)
4698 printk(KERN_INFO
"%s", version
);
4700 res
= bond_check_params(&bonding_defaults
);
4705 #ifdef CONFIG_PROC_FS
4706 bond_create_proc_dir();
4708 for (i
= 0; i
< max_bonds
; i
++) {
4709 res
= bond_create(NULL
, &bonding_defaults
, NULL
);
4714 res
= bond_create_sysfs();
4718 register_netdevice_notifier(&bond_netdev_notifier
);
4719 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4725 bond_destroy_sysfs();
4732 static void __exit
bonding_exit(void)
4734 unregister_netdevice_notifier(&bond_netdev_notifier
);
4735 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4739 bond_destroy_sysfs();
4743 module_init(bonding_init
);
4744 module_exit(bonding_exit
);
4745 MODULE_LICENSE("GPL");
4746 MODULE_VERSION(DRV_VERSION
);
4747 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4748 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4749 MODULE_SUPPORTED_DEVICE("most ethernet devices");