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/sched.h>
39 #include <linux/types.h>
40 #include <linux/fcntl.h>
41 #include <linux/interrupt.h>
42 #include <linux/ptrace.h>
43 #include <linux/ioport.h>
47 #include <linux/tcp.h>
48 #include <linux/udp.h>
49 #include <linux/slab.h>
50 #include <linux/string.h>
51 #include <linux/init.h>
52 #include <linux/timer.h>
53 #include <linux/socket.h>
54 #include <linux/ctype.h>
55 #include <linux/inet.h>
56 #include <linux/bitops.h>
57 #include <asm/system.h>
60 #include <asm/uaccess.h>
61 #include <linux/errno.h>
62 #include <linux/netdevice.h>
63 #include <linux/inetdevice.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <net/route.h>
82 /*---------------------------- Module parameters ----------------------------*/
84 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
85 #define BOND_LINK_MON_INTERV 0
86 #define BOND_LINK_ARP_INTERV 0
88 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
89 static int miimon
= BOND_LINK_MON_INTERV
;
90 static int updelay
= 0;
91 static int downdelay
= 0;
92 static int use_carrier
= 1;
93 static char *mode
= NULL
;
94 static char *primary
= NULL
;
95 static char *lacp_rate
= NULL
;
96 static char *xmit_hash_policy
= NULL
;
97 static int arp_interval
= BOND_LINK_ARP_INTERV
;
98 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
99 static char *arp_validate
= NULL
;
100 struct bond_params bonding_defaults
;
102 module_param(max_bonds
, int, 0);
103 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
104 module_param(miimon
, int, 0);
105 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
106 module_param(updelay
, int, 0);
107 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
108 module_param(downdelay
, int, 0);
109 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
111 module_param(use_carrier
, int, 0);
112 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
113 "0 for off, 1 for on (default)");
114 module_param(mode
, charp
, 0);
115 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
116 "1 for active-backup, 2 for balance-xor, "
117 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
118 "6 for balance-alb");
119 module_param(primary
, charp
, 0);
120 MODULE_PARM_DESC(primary
, "Primary network device to use");
121 module_param(lacp_rate
, charp
, 0);
122 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
124 module_param(xmit_hash_policy
, charp
, 0);
125 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
126 ", 1 for layer 3+4");
127 module_param(arp_interval
, int, 0);
128 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
129 module_param_array(arp_ip_target
, charp
, NULL
, 0);
130 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
131 module_param(arp_validate
, charp
, 0);
132 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
134 /*----------------------------- Global variables ----------------------------*/
136 static const char * const version
=
137 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
139 LIST_HEAD(bond_dev_list
);
141 #ifdef CONFIG_PROC_FS
142 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
145 extern struct rw_semaphore bonding_rwsem
;
146 static u32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
147 static int arp_ip_count
= 0;
148 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
149 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
150 static int lacp_fast
= 0;
153 struct bond_parm_tbl bond_lacp_tbl
[] = {
154 { "slow", AD_LACP_SLOW
},
155 { "fast", AD_LACP_FAST
},
159 struct bond_parm_tbl bond_mode_tbl
[] = {
160 { "balance-rr", BOND_MODE_ROUNDROBIN
},
161 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
162 { "balance-xor", BOND_MODE_XOR
},
163 { "broadcast", BOND_MODE_BROADCAST
},
164 { "802.3ad", BOND_MODE_8023AD
},
165 { "balance-tlb", BOND_MODE_TLB
},
166 { "balance-alb", BOND_MODE_ALB
},
170 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
171 { "layer2", BOND_XMIT_POLICY_LAYER2
},
172 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
176 struct bond_parm_tbl arp_validate_tbl
[] = {
177 { "none", BOND_ARP_VALIDATE_NONE
},
178 { "active", BOND_ARP_VALIDATE_ACTIVE
},
179 { "backup", BOND_ARP_VALIDATE_BACKUP
},
180 { "all", BOND_ARP_VALIDATE_ALL
},
184 /*-------------------------- Forward declarations ---------------------------*/
186 static void bond_send_gratuitous_arp(struct bonding
*bond
);
188 /*---------------------------- General routines -----------------------------*/
190 const char *bond_mode_name(int mode
)
193 case BOND_MODE_ROUNDROBIN
:
194 return "load balancing (round-robin)";
195 case BOND_MODE_ACTIVEBACKUP
:
196 return "fault-tolerance (active-backup)";
198 return "load balancing (xor)";
199 case BOND_MODE_BROADCAST
:
200 return "fault-tolerance (broadcast)";
201 case BOND_MODE_8023AD
:
202 return "IEEE 802.3ad Dynamic link aggregation";
204 return "transmit load balancing";
206 return "adaptive load balancing";
212 /*---------------------------------- VLAN -----------------------------------*/
215 * bond_add_vlan - add a new vlan id on bond
216 * @bond: bond that got the notification
217 * @vlan_id: the vlan id to add
219 * Returns -ENOMEM if allocation failed.
221 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
223 struct vlan_entry
*vlan
;
225 dprintk("bond: %s, vlan id %d\n",
226 (bond
? bond
->dev
->name
: "None"), vlan_id
);
228 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
233 INIT_LIST_HEAD(&vlan
->vlan_list
);
234 vlan
->vlan_id
= vlan_id
;
237 write_lock_bh(&bond
->lock
);
239 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
241 write_unlock_bh(&bond
->lock
);
243 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
249 * bond_del_vlan - delete a vlan id from bond
250 * @bond: bond that got the notification
251 * @vlan_id: the vlan id to delete
253 * returns -ENODEV if @vlan_id was not found in @bond.
255 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
257 struct vlan_entry
*vlan
, *next
;
260 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
262 write_lock_bh(&bond
->lock
);
264 list_for_each_entry_safe(vlan
, next
, &bond
->vlan_list
, vlan_list
) {
265 if (vlan
->vlan_id
== vlan_id
) {
266 list_del(&vlan
->vlan_list
);
268 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
269 (bond
->params
.mode
== BOND_MODE_ALB
)) {
270 bond_alb_clear_vlan(bond
, vlan_id
);
273 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
278 if (list_empty(&bond
->vlan_list
) &&
279 (bond
->slave_cnt
== 0)) {
280 /* Last VLAN removed and no slaves, so
281 * restore block on adding VLANs. This will
282 * be removed once new slaves that are not
283 * VLAN challenged will be added.
285 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
293 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
297 write_unlock_bh(&bond
->lock
);
302 * bond_has_challenged_slaves
303 * @bond: the bond we're working on
305 * Searches the slave list. Returns 1 if a vlan challenged slave
306 * was found, 0 otherwise.
308 * Assumes bond->lock is held.
310 static int bond_has_challenged_slaves(struct bonding
*bond
)
315 bond_for_each_slave(bond
, slave
, i
) {
316 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
317 dprintk("found VLAN challenged slave - %s\n",
323 dprintk("no VLAN challenged slaves found\n");
328 * bond_next_vlan - safely skip to the next item in the vlans list.
329 * @bond: the bond we're working on
330 * @curr: item we're advancing from
332 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
333 * or @curr->next otherwise (even if it is @curr itself again).
335 * Caller must hold bond->lock
337 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
339 struct vlan_entry
*next
, *last
;
341 if (list_empty(&bond
->vlan_list
)) {
346 next
= list_entry(bond
->vlan_list
.next
,
347 struct vlan_entry
, vlan_list
);
349 last
= list_entry(bond
->vlan_list
.prev
,
350 struct vlan_entry
, vlan_list
);
352 next
= list_entry(bond
->vlan_list
.next
,
353 struct vlan_entry
, vlan_list
);
355 next
= list_entry(curr
->vlan_list
.next
,
356 struct vlan_entry
, vlan_list
);
364 * bond_dev_queue_xmit - Prepare skb for xmit.
366 * @bond: bond device that got this skb for tx.
367 * @skb: hw accel VLAN tagged skb to transmit
368 * @slave_dev: slave that is supposed to xmit this skbuff
370 * When the bond gets an skb to transmit that is
371 * already hardware accelerated VLAN tagged, and it
372 * needs to relay this skb to a slave that is not
373 * hw accel capable, the skb needs to be "unaccelerated",
374 * i.e. strip the hwaccel tag and re-insert it as part
377 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
379 unsigned short vlan_id
;
381 if (!list_empty(&bond
->vlan_list
) &&
382 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
383 vlan_get_tag(skb
, &vlan_id
) == 0) {
384 skb
->dev
= slave_dev
;
385 skb
= vlan_put_tag(skb
, vlan_id
);
387 /* vlan_put_tag() frees the skb in case of error,
388 * so return success here so the calling functions
389 * won't attempt to free is again.
394 skb
->dev
= slave_dev
;
404 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
405 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
407 * a. This operation is performed in IOCTL context,
408 * b. The operation is protected by the RTNL semaphore in the 8021q code,
409 * c. Holding a lock with BH disabled while directly calling a base driver
410 * entry point is generally a BAD idea.
412 * The design of synchronization/protection for this operation in the 8021q
413 * module is good for one or more VLAN devices over a single physical device
414 * and cannot be extended for a teaming solution like bonding, so there is a
415 * potential race condition here where a net device from the vlan group might
416 * be referenced (either by a base driver or the 8021q code) while it is being
417 * removed from the system. However, it turns out we're not making matters
418 * worse, and if it works for regular VLAN usage it will work here too.
422 * bond_vlan_rx_register - Propagates registration to slaves
423 * @bond_dev: bonding net device that got called
424 * @grp: vlan group being registered
426 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
428 struct bonding
*bond
= bond_dev
->priv
;
434 bond_for_each_slave(bond
, slave
, i
) {
435 struct net_device
*slave_dev
= slave
->dev
;
437 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
438 slave_dev
->vlan_rx_register
) {
439 slave_dev
->vlan_rx_register(slave_dev
, grp
);
445 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
446 * @bond_dev: bonding net device that got called
447 * @vid: vlan id being added
449 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
451 struct bonding
*bond
= bond_dev
->priv
;
455 bond_for_each_slave(bond
, slave
, i
) {
456 struct net_device
*slave_dev
= slave
->dev
;
458 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
459 slave_dev
->vlan_rx_add_vid
) {
460 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
464 res
= bond_add_vlan(bond
, vid
);
466 printk(KERN_ERR DRV_NAME
467 ": %s: Error: Failed to add vlan id %d\n",
468 bond_dev
->name
, vid
);
473 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
474 * @bond_dev: bonding net device that got called
475 * @vid: vlan id being removed
477 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
479 struct bonding
*bond
= bond_dev
->priv
;
481 struct net_device
*vlan_dev
;
484 bond_for_each_slave(bond
, slave
, i
) {
485 struct net_device
*slave_dev
= slave
->dev
;
487 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
488 slave_dev
->vlan_rx_kill_vid
) {
489 /* Save and then restore vlan_dev in the grp array,
490 * since the slave's driver might clear it.
492 vlan_dev
= bond
->vlgrp
->vlan_devices
[vid
];
493 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
494 bond
->vlgrp
->vlan_devices
[vid
] = vlan_dev
;
498 res
= bond_del_vlan(bond
, vid
);
500 printk(KERN_ERR DRV_NAME
501 ": %s: Error: Failed to remove vlan id %d\n",
502 bond_dev
->name
, vid
);
506 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
508 struct vlan_entry
*vlan
;
510 write_lock_bh(&bond
->lock
);
512 if (list_empty(&bond
->vlan_list
)) {
516 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
517 slave_dev
->vlan_rx_register
) {
518 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
521 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
522 !(slave_dev
->vlan_rx_add_vid
)) {
526 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
527 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
531 write_unlock_bh(&bond
->lock
);
534 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
536 struct vlan_entry
*vlan
;
537 struct net_device
*vlan_dev
;
539 write_lock_bh(&bond
->lock
);
541 if (list_empty(&bond
->vlan_list
)) {
545 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
546 !(slave_dev
->vlan_rx_kill_vid
)) {
550 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
551 /* Save and then restore vlan_dev in the grp array,
552 * since the slave's driver might clear it.
554 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
555 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
556 bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
] = vlan_dev
;
560 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
561 slave_dev
->vlan_rx_register
) {
562 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
566 write_unlock_bh(&bond
->lock
);
569 /*------------------------------- Link status -------------------------------*/
572 * Set the carrier state for the master according to the state of its
573 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
574 * do special 802.3ad magic.
576 * Returns zero if carrier state does not change, nonzero if it does.
578 static int bond_set_carrier(struct bonding
*bond
)
583 if (bond
->slave_cnt
== 0)
586 if (bond
->params
.mode
== BOND_MODE_8023AD
)
587 return bond_3ad_set_carrier(bond
);
589 bond_for_each_slave(bond
, slave
, i
) {
590 if (slave
->link
== BOND_LINK_UP
) {
591 if (!netif_carrier_ok(bond
->dev
)) {
592 netif_carrier_on(bond
->dev
);
600 if (netif_carrier_ok(bond
->dev
)) {
601 netif_carrier_off(bond
->dev
);
608 * Get link speed and duplex from the slave's base driver
609 * using ethtool. If for some reason the call fails or the
610 * values are invalid, fake speed and duplex to 100/Full
613 static int bond_update_speed_duplex(struct slave
*slave
)
615 struct net_device
*slave_dev
= slave
->dev
;
616 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
618 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
) {
627 if (!slave_dev
->ethtool_ops
->get_settings
) {
631 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
639 ioctl
= slave_dev
->do_ioctl
;
640 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
641 etool
.cmd
= ETHTOOL_GSET
;
642 ifr
.ifr_data
= (char*)&etool
;
643 if (!ioctl
|| (IOCTL(slave_dev
, &ifr
, SIOCETHTOOL
) < 0)) {
648 switch (etool
.speed
) {
658 switch (etool
.duplex
) {
666 slave
->speed
= etool
.speed
;
667 slave
->duplex
= etool
.duplex
;
673 * if <dev> supports MII link status reporting, check its link status.
675 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
676 * depening upon the setting of the use_carrier parameter.
678 * Return either BMSR_LSTATUS, meaning that the link is up (or we
679 * can't tell and just pretend it is), or 0, meaning that the link is
682 * If reporting is non-zero, instead of faking link up, return -1 if
683 * both ETHTOOL and MII ioctls fail (meaning the device does not
684 * support them). If use_carrier is set, return whatever it says.
685 * It'd be nice if there was a good way to tell if a driver supports
686 * netif_carrier, but there really isn't.
688 static int bond_check_dev_link(struct bonding
*bond
, struct net_device
*slave_dev
, int reporting
)
690 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
692 struct mii_ioctl_data
*mii
;
693 struct ethtool_value etool
;
695 if (bond
->params
.use_carrier
) {
696 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
699 ioctl
= slave_dev
->do_ioctl
;
701 /* TODO: set pointer to correct ioctl on a per team member */
702 /* bases to make this more efficient. that is, once */
703 /* we determine the correct ioctl, we will always */
704 /* call it and not the others for that team */
708 * We cannot assume that SIOCGMIIPHY will also read a
709 * register; not all network drivers (e.g., e100)
713 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
714 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
716 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
717 mii
->reg_num
= MII_BMSR
;
718 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
719 return (mii
->val_out
& BMSR_LSTATUS
);
724 /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */
725 /* for a period of time so we attempt to get link status */
726 /* from it last if the above MII ioctls fail... */
727 if (slave_dev
->ethtool_ops
) {
728 if (slave_dev
->ethtool_ops
->get_link
) {
731 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
733 return link
? BMSR_LSTATUS
: 0;
738 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
739 etool
.cmd
= ETHTOOL_GLINK
;
740 ifr
.ifr_data
= (char*)&etool
;
741 if (IOCTL(slave_dev
, &ifr
, SIOCETHTOOL
) == 0) {
742 if (etool
.data
== 1) {
745 dprintk("SIOCETHTOOL shows link down\n");
752 * If reporting, report that either there's no dev->do_ioctl,
753 * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we
754 * cannot report link status). If not reporting, pretend
757 return (reporting
? -1 : BMSR_LSTATUS
);
760 /*----------------------------- Multicast list ------------------------------*/
763 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
765 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
767 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
768 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
772 * returns dmi entry if found, NULL otherwise
774 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
776 struct dev_mc_list
*idmi
;
778 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
779 if (bond_is_dmi_same(dmi
, idmi
)) {
788 * Push the promiscuity flag down to appropriate slaves
790 static void bond_set_promiscuity(struct bonding
*bond
, int inc
)
792 if (USES_PRIMARY(bond
->params
.mode
)) {
793 /* write lock already acquired */
794 if (bond
->curr_active_slave
) {
795 dev_set_promiscuity(bond
->curr_active_slave
->dev
, inc
);
800 bond_for_each_slave(bond
, slave
, i
) {
801 dev_set_promiscuity(slave
->dev
, inc
);
807 * Push the allmulti flag down to all slaves
809 static void bond_set_allmulti(struct bonding
*bond
, int inc
)
811 if (USES_PRIMARY(bond
->params
.mode
)) {
812 /* write lock already acquired */
813 if (bond
->curr_active_slave
) {
814 dev_set_allmulti(bond
->curr_active_slave
->dev
, inc
);
819 bond_for_each_slave(bond
, slave
, i
) {
820 dev_set_allmulti(slave
->dev
, inc
);
826 * Add a Multicast address to slaves
829 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
831 if (USES_PRIMARY(bond
->params
.mode
)) {
832 /* write lock already acquired */
833 if (bond
->curr_active_slave
) {
834 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
839 bond_for_each_slave(bond
, slave
, i
) {
840 dev_mc_add(slave
->dev
, addr
, alen
, 0);
846 * Remove a multicast address from slave
849 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
851 if (USES_PRIMARY(bond
->params
.mode
)) {
852 /* write lock already acquired */
853 if (bond
->curr_active_slave
) {
854 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
859 bond_for_each_slave(bond
, slave
, i
) {
860 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
866 * Totally destroys the mc_list in bond
868 static void bond_mc_list_destroy(struct bonding
*bond
)
870 struct dev_mc_list
*dmi
;
874 bond
->mc_list
= dmi
->next
;
881 * Copy all the Multicast addresses from src to the bonding device dst
883 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
886 struct dev_mc_list
*dmi
, *new_dmi
;
888 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
889 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
892 /* FIXME: Potential memory leak !!! */
896 new_dmi
->next
= bond
->mc_list
;
897 bond
->mc_list
= new_dmi
;
898 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
899 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
900 new_dmi
->dmi_users
= dmi
->dmi_users
;
901 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
908 * flush all members of flush->mc_list from device dev->mc_list
910 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
912 struct bonding
*bond
= bond_dev
->priv
;
913 struct dev_mc_list
*dmi
;
915 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
916 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
919 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
920 /* del lacpdu mc addr from mc list */
921 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
923 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
927 /*--------------------------- Active slave change ---------------------------*/
930 * Update the mc list and multicast-related flags for the new and
931 * old active slaves (if any) according to the multicast mode, and
932 * promiscuous flags unconditionally.
934 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
936 struct dev_mc_list
*dmi
;
938 if (!USES_PRIMARY(bond
->params
.mode
)) {
939 /* nothing to do - mc list is already up-to-date on
946 if (bond
->dev
->flags
& IFF_PROMISC
) {
947 dev_set_promiscuity(old_active
->dev
, -1);
950 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
951 dev_set_allmulti(old_active
->dev
, -1);
954 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
955 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
960 if (bond
->dev
->flags
& IFF_PROMISC
) {
961 dev_set_promiscuity(new_active
->dev
, 1);
964 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
965 dev_set_allmulti(new_active
->dev
, 1);
968 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
969 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
975 * find_best_interface - select the best available slave to be the active one
976 * @bond: our bonding struct
978 * Warning: Caller must hold curr_slave_lock for writing.
980 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
982 struct slave
*new_active
, *old_active
;
983 struct slave
*bestslave
= NULL
;
984 int mintime
= bond
->params
.updelay
;
987 new_active
= old_active
= bond
->curr_active_slave
;
989 if (!new_active
) { /* there were no active slaves left */
990 if (bond
->slave_cnt
> 0) { /* found one slave */
991 new_active
= bond
->first_slave
;
993 return NULL
; /* still no slave, return NULL */
997 /* first try the primary link; if arping, a link must tx/rx traffic
998 * before it can be considered the curr_active_slave - also, we would skip
999 * slaves between the curr_active_slave and primary_slave that may be up
1002 if ((bond
->primary_slave
) &&
1003 (!bond
->params
.arp_interval
) &&
1004 (IS_UP(bond
->primary_slave
->dev
))) {
1005 new_active
= bond
->primary_slave
;
1008 /* remember where to stop iterating over the slaves */
1009 old_active
= new_active
;
1011 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1012 if (IS_UP(new_active
->dev
)) {
1013 if (new_active
->link
== BOND_LINK_UP
) {
1015 } else if (new_active
->link
== BOND_LINK_BACK
) {
1016 /* link up, but waiting for stabilization */
1017 if (new_active
->delay
< mintime
) {
1018 mintime
= new_active
->delay
;
1019 bestslave
= new_active
;
1029 * change_active_interface - change the active slave into the specified one
1030 * @bond: our bonding struct
1031 * @new: the new slave to make the active one
1033 * Set the new slave to the bond's settings and unset them on the old
1034 * curr_active_slave.
1035 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1037 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1038 * because it is apparently the best available slave we have, even though its
1039 * updelay hasn't timed out yet.
1041 * Warning: Caller must hold curr_slave_lock for writing.
1043 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1045 struct slave
*old_active
= bond
->curr_active_slave
;
1047 if (old_active
== new_active
) {
1052 if (new_active
->link
== BOND_LINK_BACK
) {
1053 if (USES_PRIMARY(bond
->params
.mode
)) {
1054 printk(KERN_INFO DRV_NAME
1055 ": %s: making interface %s the new "
1056 "active one %d ms earlier.\n",
1057 bond
->dev
->name
, new_active
->dev
->name
,
1058 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1061 new_active
->delay
= 0;
1062 new_active
->link
= BOND_LINK_UP
;
1063 new_active
->jiffies
= jiffies
;
1065 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1066 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1069 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1070 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1071 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1074 if (USES_PRIMARY(bond
->params
.mode
)) {
1075 printk(KERN_INFO DRV_NAME
1076 ": %s: making interface %s the new "
1078 bond
->dev
->name
, new_active
->dev
->name
);
1083 if (USES_PRIMARY(bond
->params
.mode
)) {
1084 bond_mc_swap(bond
, new_active
, old_active
);
1087 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1088 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1089 bond_alb_handle_active_change(bond
, new_active
);
1091 bond_set_slave_inactive_flags(old_active
);
1093 bond_set_slave_active_flags(new_active
);
1095 bond
->curr_active_slave
= new_active
;
1098 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1100 bond_set_slave_inactive_flags(old_active
);
1104 bond_set_slave_active_flags(new_active
);
1106 bond_send_gratuitous_arp(bond
);
1111 * bond_select_active_slave - select a new active slave, if needed
1112 * @bond: our bonding struct
1114 * This functions shoud be called when one of the following occurs:
1115 * - The old curr_active_slave has been released or lost its link.
1116 * - The primary_slave has got its link back.
1117 * - A slave has got its link back and there's no old curr_active_slave.
1119 * Warning: Caller must hold curr_slave_lock for writing.
1121 void bond_select_active_slave(struct bonding
*bond
)
1123 struct slave
*best_slave
;
1126 best_slave
= bond_find_best_slave(bond
);
1127 if (best_slave
!= bond
->curr_active_slave
) {
1128 bond_change_active_slave(bond
, best_slave
);
1129 rv
= bond_set_carrier(bond
);
1133 if (netif_carrier_ok(bond
->dev
)) {
1134 printk(KERN_INFO DRV_NAME
1135 ": %s: first active interface up!\n",
1138 printk(KERN_INFO DRV_NAME
": %s: "
1139 "now running without any active interface !\n",
1145 /*--------------------------- slave list handling ---------------------------*/
1148 * This function attaches the slave to the end of list.
1150 * bond->lock held for writing by caller.
1152 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1154 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1155 new_slave
->next
= new_slave
;
1156 new_slave
->prev
= new_slave
;
1157 bond
->first_slave
= new_slave
;
1159 new_slave
->next
= bond
->first_slave
;
1160 new_slave
->prev
= bond
->first_slave
->prev
;
1161 new_slave
->next
->prev
= new_slave
;
1162 new_slave
->prev
->next
= new_slave
;
1169 * This function detaches the slave from the list.
1170 * WARNING: no check is made to verify if the slave effectively
1171 * belongs to <bond>.
1172 * Nothing is freed on return, structures are just unchained.
1173 * If any slave pointer in bond was pointing to <slave>,
1174 * it should be changed by the calling function.
1176 * bond->lock held for writing by caller.
1178 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1181 slave
->next
->prev
= slave
->prev
;
1185 slave
->prev
->next
= slave
->next
;
1188 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1189 if (bond
->slave_cnt
> 1) { /* there are more slave */
1190 bond
->first_slave
= slave
->next
;
1192 bond
->first_slave
= NULL
; /* slave was the last one */
1201 /*---------------------------------- IOCTL ----------------------------------*/
1203 int bond_sethwaddr(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1205 dprintk("bond_dev=%p\n", bond_dev
);
1206 dprintk("slave_dev=%p\n", slave_dev
);
1207 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1208 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1212 #define BOND_INTERSECT_FEATURES \
1213 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_TSO | NETIF_F_UFO)
1216 * Compute the common dev->feature set available to all slaves. Some
1217 * feature bits are managed elsewhere, so preserve feature bits set on
1218 * master device that are not part of the examined set.
1220 static int bond_compute_features(struct bonding
*bond
)
1222 unsigned long features
= BOND_INTERSECT_FEATURES
;
1223 struct slave
*slave
;
1224 struct net_device
*bond_dev
= bond
->dev
;
1225 unsigned short max_hard_header_len
= ETH_HLEN
;
1228 bond_for_each_slave(bond
, slave
, i
) {
1229 features
&= (slave
->dev
->features
& BOND_INTERSECT_FEATURES
);
1230 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1231 max_hard_header_len
= slave
->dev
->hard_header_len
;
1234 if ((features
& NETIF_F_SG
) &&
1235 !(features
& NETIF_F_ALL_CSUM
))
1236 features
&= ~NETIF_F_SG
;
1239 * features will include NETIF_F_TSO (NETIF_F_UFO) iff all
1240 * slave devices support NETIF_F_TSO (NETIF_F_UFO), which
1241 * implies that all slaves also support scatter-gather
1242 * (NETIF_F_SG), which implies that features also includes
1243 * NETIF_F_SG. So no need to check whether we have an
1244 * illegal combination of NETIF_F_{TSO,UFO} and
1248 features
|= (bond_dev
->features
& ~BOND_INTERSECT_FEATURES
);
1249 bond_dev
->features
= features
;
1250 bond_dev
->hard_header_len
= max_hard_header_len
;
1255 /* enslave device <slave> to bond device <master> */
1256 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1258 struct bonding
*bond
= bond_dev
->priv
;
1259 struct slave
*new_slave
= NULL
;
1260 struct dev_mc_list
*dmi
;
1261 struct sockaddr addr
;
1263 int old_features
= bond_dev
->features
;
1266 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1267 slave_dev
->do_ioctl
== NULL
) {
1268 printk(KERN_WARNING DRV_NAME
1269 ": %s: Warning: no link monitoring support for %s\n",
1270 bond_dev
->name
, slave_dev
->name
);
1273 /* bond must be initialized by bond_open() before enslaving */
1274 if (!(bond_dev
->flags
& IFF_UP
)) {
1275 dprintk("Error, master_dev is not up\n");
1279 /* already enslaved */
1280 if (slave_dev
->flags
& IFF_SLAVE
) {
1281 dprintk("Error, Device was already enslaved\n");
1285 /* vlan challenged mutual exclusion */
1286 /* no need to lock since we're protected by rtnl_lock */
1287 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1288 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1289 if (!list_empty(&bond
->vlan_list
)) {
1290 printk(KERN_ERR DRV_NAME
1291 ": %s: Error: cannot enslave VLAN "
1292 "challenged slave %s on VLAN enabled "
1293 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1297 printk(KERN_WARNING DRV_NAME
1298 ": %s: Warning: enslaved VLAN challenged "
1299 "slave %s. Adding VLANs will be blocked as "
1300 "long as %s is part of bond %s\n",
1301 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1303 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1306 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1307 if (bond
->slave_cnt
== 0) {
1308 /* First slave, and it is not VLAN challenged,
1309 * so remove the block of adding VLANs over the bond.
1311 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1316 * Old ifenslave binaries are no longer supported. These can
1317 * be identified with moderate accurary by the state of the slave:
1318 * the current ifenslave will set the interface down prior to
1319 * enslaving it; the old ifenslave will not.
1321 if ((slave_dev
->flags
& IFF_UP
)) {
1322 printk(KERN_ERR DRV_NAME
": %s is up. "
1323 "This may be due to an out of date ifenslave.\n",
1326 goto err_undo_flags
;
1329 if (slave_dev
->set_mac_address
== NULL
) {
1330 printk(KERN_ERR DRV_NAME
1331 ": %s: Error: The slave device you specified does "
1332 "not support setting the MAC address. "
1333 "Your kernel likely does not support slave "
1334 "devices.\n", bond_dev
->name
);
1336 goto err_undo_flags
;
1339 new_slave
= kmalloc(sizeof(struct slave
), GFP_KERNEL
);
1342 goto err_undo_flags
;
1345 memset(new_slave
, 0, sizeof(struct slave
));
1347 /* save slave's original flags before calling
1348 * netdev_set_master and dev_open
1350 new_slave
->original_flags
= slave_dev
->flags
;
1353 * Save slave's original ("permanent") mac address for modes
1354 * that need it, and for restoring it upon release, and then
1355 * set it to the master's address
1357 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1360 * Set slave to master's mac address. The application already
1361 * set the master's mac address to that of the first slave
1363 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1364 addr
.sa_family
= slave_dev
->type
;
1365 res
= dev_set_mac_address(slave_dev
, &addr
);
1367 dprintk("Error %d calling set_mac_address\n", res
);
1371 /* open the slave since the application closed it */
1372 res
= dev_open(slave_dev
);
1374 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1375 goto err_restore_mac
;
1378 res
= netdev_set_master(slave_dev
, bond_dev
);
1380 dprintk("Error %d calling netdev_set_master\n", res
);
1384 new_slave
->dev
= slave_dev
;
1385 slave_dev
->priv_flags
|= IFF_BONDING
;
1387 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1388 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1389 /* bond_alb_init_slave() must be called before all other stages since
1390 * it might fail and we do not want to have to undo everything
1392 res
= bond_alb_init_slave(bond
, new_slave
);
1394 goto err_unset_master
;
1398 /* If the mode USES_PRIMARY, then the new slave gets the
1399 * master's promisc (and mc) settings only if it becomes the
1400 * curr_active_slave, and that is taken care of later when calling
1401 * bond_change_active()
1403 if (!USES_PRIMARY(bond
->params
.mode
)) {
1404 /* set promiscuity level to new slave */
1405 if (bond_dev
->flags
& IFF_PROMISC
) {
1406 dev_set_promiscuity(slave_dev
, 1);
1409 /* set allmulti level to new slave */
1410 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1411 dev_set_allmulti(slave_dev
, 1);
1414 /* upload master's mc_list to new slave */
1415 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1416 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1420 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1421 /* add lacpdu mc addr to mc list */
1422 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1424 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1427 bond_add_vlans_on_slave(bond
, slave_dev
);
1429 write_lock_bh(&bond
->lock
);
1431 bond_attach_slave(bond
, new_slave
);
1433 new_slave
->delay
= 0;
1434 new_slave
->link_failure_count
= 0;
1436 bond_compute_features(bond
);
1438 new_slave
->last_arp_rx
= jiffies
;
1440 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1441 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1443 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1445 * miimon is set but a bonded network driver
1446 * does not support ETHTOOL/MII and
1447 * arp_interval is not set. Note: if
1448 * use_carrier is enabled, we will never go
1449 * here (because netif_carrier is always
1450 * supported); thus, we don't need to change
1451 * the messages for netif_carrier.
1453 printk(KERN_WARNING DRV_NAME
1454 ": %s: Warning: MII and ETHTOOL support not "
1455 "available for interface %s, and "
1456 "arp_interval/arp_ip_target module parameters "
1457 "not specified, thus bonding will not detect "
1458 "link failures! see bonding.txt for details.\n",
1459 bond_dev
->name
, slave_dev
->name
);
1460 } else if (link_reporting
== -1) {
1461 /* unable get link status using mii/ethtool */
1462 printk(KERN_WARNING DRV_NAME
1463 ": %s: Warning: can't get link status from "
1464 "interface %s; the network driver associated "
1465 "with this interface does not support MII or "
1466 "ETHTOOL link status reporting, thus miimon "
1467 "has no effect on this interface.\n",
1468 bond_dev
->name
, slave_dev
->name
);
1472 /* check for initial state */
1473 if (!bond
->params
.miimon
||
1474 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1475 if (bond
->params
.updelay
) {
1476 dprintk("Initial state of slave_dev is "
1477 "BOND_LINK_BACK\n");
1478 new_slave
->link
= BOND_LINK_BACK
;
1479 new_slave
->delay
= bond
->params
.updelay
;
1481 dprintk("Initial state of slave_dev is "
1483 new_slave
->link
= BOND_LINK_UP
;
1485 new_slave
->jiffies
= jiffies
;
1487 dprintk("Initial state of slave_dev is "
1488 "BOND_LINK_DOWN\n");
1489 new_slave
->link
= BOND_LINK_DOWN
;
1492 if (bond_update_speed_duplex(new_slave
) &&
1493 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1494 printk(KERN_WARNING DRV_NAME
1495 ": %s: Warning: failed to get speed and duplex from %s, "
1496 "assumed to be 100Mb/sec and Full.\n",
1497 bond_dev
->name
, new_slave
->dev
->name
);
1499 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1500 printk(KERN_WARNING DRV_NAME
1501 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1502 "support in base driver for proper aggregator "
1503 "selection.\n", bond_dev
->name
);
1507 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1508 /* if there is a primary slave, remember it */
1509 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1510 bond
->primary_slave
= new_slave
;
1514 switch (bond
->params
.mode
) {
1515 case BOND_MODE_ACTIVEBACKUP
:
1516 bond_set_slave_inactive_flags(new_slave
);
1517 bond_select_active_slave(bond
);
1519 case BOND_MODE_8023AD
:
1520 /* in 802.3ad mode, the internal mechanism
1521 * will activate the slaves in the selected
1524 bond_set_slave_inactive_flags(new_slave
);
1525 /* if this is the first slave */
1526 if (bond
->slave_cnt
== 1) {
1527 SLAVE_AD_INFO(new_slave
).id
= 1;
1528 /* Initialize AD with the number of times that the AD timer is called in 1 second
1529 * can be called only after the mac address of the bond is set
1531 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1532 bond
->params
.lacp_fast
);
1534 SLAVE_AD_INFO(new_slave
).id
=
1535 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1538 bond_3ad_bind_slave(new_slave
);
1542 new_slave
->state
= BOND_STATE_ACTIVE
;
1543 if ((!bond
->curr_active_slave
) &&
1544 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1545 /* first slave or no active slave yet, and this link
1546 * is OK, so make this interface the active one
1548 bond_change_active_slave(bond
, new_slave
);
1550 bond_set_slave_inactive_flags(new_slave
);
1554 dprintk("This slave is always active in trunk mode\n");
1556 /* always active in trunk mode */
1557 new_slave
->state
= BOND_STATE_ACTIVE
;
1559 /* In trunking mode there is little meaning to curr_active_slave
1560 * anyway (it holds no special properties of the bond device),
1561 * so we can change it without calling change_active_interface()
1563 if (!bond
->curr_active_slave
) {
1564 bond
->curr_active_slave
= new_slave
;
1567 } /* switch(bond_mode) */
1569 bond_set_carrier(bond
);
1571 write_unlock_bh(&bond
->lock
);
1573 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1575 goto err_unset_master
;
1577 printk(KERN_INFO DRV_NAME
1578 ": %s: enslaving %s as a%s interface with a%s link.\n",
1579 bond_dev
->name
, slave_dev
->name
,
1580 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1581 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1583 /* enslave is successful */
1586 /* Undo stages on error */
1588 netdev_set_master(slave_dev
, NULL
);
1591 dev_close(slave_dev
);
1594 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1595 addr
.sa_family
= slave_dev
->type
;
1596 dev_set_mac_address(slave_dev
, &addr
);
1602 bond_dev
->features
= old_features
;
1608 * Try to release the slave device <slave> from the bond device <master>
1609 * It is legal to access curr_active_slave without a lock because all the function
1612 * The rules for slave state should be:
1613 * for Active/Backup:
1614 * Active stays on all backups go down
1615 * for Bonded connections:
1616 * The first up interface should be left on and all others downed.
1618 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1620 struct bonding
*bond
= bond_dev
->priv
;
1621 struct slave
*slave
, *oldcurrent
;
1622 struct sockaddr addr
;
1623 int mac_addr_differ
;
1625 /* slave is not a slave or master is not master of this slave */
1626 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1627 (slave_dev
->master
!= bond_dev
)) {
1628 printk(KERN_ERR DRV_NAME
1629 ": %s: Error: cannot release %s.\n",
1630 bond_dev
->name
, slave_dev
->name
);
1634 write_lock_bh(&bond
->lock
);
1636 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1638 /* not a slave of this bond */
1639 printk(KERN_INFO DRV_NAME
1640 ": %s: %s not enslaved\n",
1641 bond_dev
->name
, slave_dev
->name
);
1642 write_unlock_bh(&bond
->lock
);
1646 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1649 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1650 printk(KERN_WARNING DRV_NAME
1651 ": %s: Warning: the permanent HWaddr of %s "
1652 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1653 "still in use by %s. Set the HWaddr of "
1654 "%s to a different address to avoid "
1658 slave
->perm_hwaddr
[0],
1659 slave
->perm_hwaddr
[1],
1660 slave
->perm_hwaddr
[2],
1661 slave
->perm_hwaddr
[3],
1662 slave
->perm_hwaddr
[4],
1663 slave
->perm_hwaddr
[5],
1668 /* Inform AD package of unbinding of slave. */
1669 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1670 /* must be called before the slave is
1671 * detached from the list
1673 bond_3ad_unbind_slave(slave
);
1676 printk(KERN_INFO DRV_NAME
1677 ": %s: releasing %s interface %s\n",
1679 (slave
->state
== BOND_STATE_ACTIVE
)
1680 ? "active" : "backup",
1683 oldcurrent
= bond
->curr_active_slave
;
1685 bond
->current_arp_slave
= NULL
;
1687 /* release the slave from its bond */
1688 bond_detach_slave(bond
, slave
);
1690 bond_compute_features(bond
);
1692 if (bond
->primary_slave
== slave
) {
1693 bond
->primary_slave
= NULL
;
1696 if (oldcurrent
== slave
) {
1697 bond_change_active_slave(bond
, NULL
);
1700 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1701 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1702 /* Must be called only after the slave has been
1703 * detached from the list and the curr_active_slave
1704 * has been cleared (if our_slave == old_current),
1705 * but before a new active slave is selected.
1707 bond_alb_deinit_slave(bond
, slave
);
1710 if (oldcurrent
== slave
)
1711 bond_select_active_slave(bond
);
1713 if (bond
->slave_cnt
== 0) {
1714 bond_set_carrier(bond
);
1716 /* if the last slave was removed, zero the mac address
1717 * of the master so it will be set by the application
1718 * to the mac address of the first slave
1720 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1722 if (list_empty(&bond
->vlan_list
)) {
1723 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1725 printk(KERN_WARNING DRV_NAME
1726 ": %s: Warning: clearing HW address of %s while it "
1727 "still has VLANs.\n",
1728 bond_dev
->name
, bond_dev
->name
);
1729 printk(KERN_WARNING DRV_NAME
1730 ": %s: When re-adding slaves, make sure the bond's "
1731 "HW address matches its VLANs'.\n",
1734 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1735 !bond_has_challenged_slaves(bond
)) {
1736 printk(KERN_INFO DRV_NAME
1737 ": %s: last VLAN challenged slave %s "
1738 "left bond %s. VLAN blocking is removed\n",
1739 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1740 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1743 write_unlock_bh(&bond
->lock
);
1745 /* must do this from outside any spinlocks */
1746 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1748 bond_del_vlans_from_slave(bond
, slave_dev
);
1750 /* If the mode USES_PRIMARY, then we should only remove its
1751 * promisc and mc settings if it was the curr_active_slave, but that was
1752 * already taken care of above when we detached the slave
1754 if (!USES_PRIMARY(bond
->params
.mode
)) {
1755 /* unset promiscuity level from slave */
1756 if (bond_dev
->flags
& IFF_PROMISC
) {
1757 dev_set_promiscuity(slave_dev
, -1);
1760 /* unset allmulti level from slave */
1761 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1762 dev_set_allmulti(slave_dev
, -1);
1765 /* flush master's mc_list from slave */
1766 bond_mc_list_flush(bond_dev
, slave_dev
);
1769 netdev_set_master(slave_dev
, NULL
);
1771 /* close slave before restoring its mac address */
1772 dev_close(slave_dev
);
1774 /* restore original ("permanent") mac address */
1775 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1776 addr
.sa_family
= slave_dev
->type
;
1777 dev_set_mac_address(slave_dev
, &addr
);
1779 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1780 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1785 return 0; /* deletion OK */
1789 * This function releases all slaves.
1791 static int bond_release_all(struct net_device
*bond_dev
)
1793 struct bonding
*bond
= bond_dev
->priv
;
1794 struct slave
*slave
;
1795 struct net_device
*slave_dev
;
1796 struct sockaddr addr
;
1798 write_lock_bh(&bond
->lock
);
1800 netif_carrier_off(bond_dev
);
1802 if (bond
->slave_cnt
== 0) {
1806 bond
->current_arp_slave
= NULL
;
1807 bond
->primary_slave
= NULL
;
1808 bond_change_active_slave(bond
, NULL
);
1810 while ((slave
= bond
->first_slave
) != NULL
) {
1811 /* Inform AD package of unbinding of slave
1812 * before slave is detached from the list.
1814 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1815 bond_3ad_unbind_slave(slave
);
1818 slave_dev
= slave
->dev
;
1819 bond_detach_slave(bond
, slave
);
1821 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1822 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1823 /* must be called only after the slave
1824 * has been detached from the list
1826 bond_alb_deinit_slave(bond
, slave
);
1829 bond_compute_features(bond
);
1831 /* now that the slave is detached, unlock and perform
1832 * all the undo steps that should not be called from
1835 write_unlock_bh(&bond
->lock
);
1837 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1838 bond_del_vlans_from_slave(bond
, slave_dev
);
1840 /* If the mode USES_PRIMARY, then we should only remove its
1841 * promisc and mc settings if it was the curr_active_slave, but that was
1842 * already taken care of above when we detached the slave
1844 if (!USES_PRIMARY(bond
->params
.mode
)) {
1845 /* unset promiscuity level from slave */
1846 if (bond_dev
->flags
& IFF_PROMISC
) {
1847 dev_set_promiscuity(slave_dev
, -1);
1850 /* unset allmulti level from slave */
1851 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1852 dev_set_allmulti(slave_dev
, -1);
1855 /* flush master's mc_list from slave */
1856 bond_mc_list_flush(bond_dev
, slave_dev
);
1859 netdev_set_master(slave_dev
, NULL
);
1861 /* close slave before restoring its mac address */
1862 dev_close(slave_dev
);
1864 /* restore original ("permanent") mac address*/
1865 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1866 addr
.sa_family
= slave_dev
->type
;
1867 dev_set_mac_address(slave_dev
, &addr
);
1869 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1870 IFF_SLAVE_INACTIVE
);
1874 /* re-acquire the lock before getting the next slave */
1875 write_lock_bh(&bond
->lock
);
1878 /* zero the mac address of the master so it will be
1879 * set by the application to the mac address of the
1882 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1884 if (list_empty(&bond
->vlan_list
)) {
1885 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1887 printk(KERN_WARNING DRV_NAME
1888 ": %s: Warning: clearing HW address of %s while it "
1889 "still has VLANs.\n",
1890 bond_dev
->name
, bond_dev
->name
);
1891 printk(KERN_WARNING DRV_NAME
1892 ": %s: When re-adding slaves, make sure the bond's "
1893 "HW address matches its VLANs'.\n",
1897 printk(KERN_INFO DRV_NAME
1898 ": %s: released all slaves\n",
1902 write_unlock_bh(&bond
->lock
);
1908 * This function changes the active slave to slave <slave_dev>.
1909 * It returns -EINVAL in the following cases.
1910 * - <slave_dev> is not found in the list.
1911 * - There is not active slave now.
1912 * - <slave_dev> is already active.
1913 * - The link state of <slave_dev> is not BOND_LINK_UP.
1914 * - <slave_dev> is not running.
1915 * In these cases, this fuction does nothing.
1916 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1918 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1920 struct bonding
*bond
= bond_dev
->priv
;
1921 struct slave
*old_active
= NULL
;
1922 struct slave
*new_active
= NULL
;
1925 if (!USES_PRIMARY(bond
->params
.mode
)) {
1929 /* Verify that master_dev is indeed the master of slave_dev */
1930 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1931 (slave_dev
->master
!= bond_dev
)) {
1935 write_lock_bh(&bond
->lock
);
1937 old_active
= bond
->curr_active_slave
;
1938 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1941 * Changing to the current active: do nothing; return success.
1943 if (new_active
&& (new_active
== old_active
)) {
1944 write_unlock_bh(&bond
->lock
);
1950 (new_active
->link
== BOND_LINK_UP
) &&
1951 IS_UP(new_active
->dev
)) {
1952 bond_change_active_slave(bond
, new_active
);
1957 write_unlock_bh(&bond
->lock
);
1962 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1964 struct bonding
*bond
= bond_dev
->priv
;
1966 info
->bond_mode
= bond
->params
.mode
;
1967 info
->miimon
= bond
->params
.miimon
;
1969 read_lock_bh(&bond
->lock
);
1970 info
->num_slaves
= bond
->slave_cnt
;
1971 read_unlock_bh(&bond
->lock
);
1976 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1978 struct bonding
*bond
= bond_dev
->priv
;
1979 struct slave
*slave
;
1982 if (info
->slave_id
< 0) {
1986 read_lock_bh(&bond
->lock
);
1988 bond_for_each_slave(bond
, slave
, i
) {
1989 if (i
== (int)info
->slave_id
) {
1995 read_unlock_bh(&bond
->lock
);
1998 strcpy(info
->slave_name
, slave
->dev
->name
);
1999 info
->link
= slave
->link
;
2000 info
->state
= slave
->state
;
2001 info
->link_failure_count
= slave
->link_failure_count
;
2009 /*-------------------------------- Monitoring -------------------------------*/
2011 /* this function is called regularly to monitor each slave's link. */
2012 void bond_mii_monitor(struct net_device
*bond_dev
)
2014 struct bonding
*bond
= bond_dev
->priv
;
2015 struct slave
*slave
, *oldcurrent
;
2016 int do_failover
= 0;
2020 read_lock(&bond
->lock
);
2022 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2024 if (bond
->kill_timers
) {
2028 if (bond
->slave_cnt
== 0) {
2032 /* we will try to read the link status of each of our slaves, and
2033 * set their IFF_RUNNING flag appropriately. For each slave not
2034 * supporting MII status, we won't do anything so that a user-space
2035 * program could monitor the link itself if needed.
2038 read_lock(&bond
->curr_slave_lock
);
2039 oldcurrent
= bond
->curr_active_slave
;
2040 read_unlock(&bond
->curr_slave_lock
);
2042 bond_for_each_slave(bond
, slave
, i
) {
2043 struct net_device
*slave_dev
= slave
->dev
;
2045 u16 old_speed
= slave
->speed
;
2046 u8 old_duplex
= slave
->duplex
;
2048 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2050 switch (slave
->link
) {
2051 case BOND_LINK_UP
: /* the link was up */
2052 if (link_state
== BMSR_LSTATUS
) {
2053 /* link stays up, nothing more to do */
2055 } else { /* link going down */
2056 slave
->link
= BOND_LINK_FAIL
;
2057 slave
->delay
= bond
->params
.downdelay
;
2059 if (slave
->link_failure_count
< UINT_MAX
) {
2060 slave
->link_failure_count
++;
2063 if (bond
->params
.downdelay
) {
2064 printk(KERN_INFO DRV_NAME
2065 ": %s: link status down for %s "
2066 "interface %s, disabling it in "
2070 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2071 ? ((slave
== oldcurrent
)
2072 ? "active " : "backup ")
2076 bond
->params
.downdelay
* bond
->params
.miimon
);
2079 /* no break ! fall through the BOND_LINK_FAIL test to
2080 ensure proper action to be taken
2082 case BOND_LINK_FAIL
: /* the link has just gone down */
2083 if (link_state
!= BMSR_LSTATUS
) {
2084 /* link stays down */
2085 if (slave
->delay
<= 0) {
2086 /* link down for too long time */
2087 slave
->link
= BOND_LINK_DOWN
;
2089 /* in active/backup mode, we must
2090 * completely disable this interface
2092 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2093 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2094 bond_set_slave_inactive_flags(slave
);
2097 printk(KERN_INFO DRV_NAME
2098 ": %s: link status definitely "
2099 "down for interface %s, "
2104 /* notify ad that the link status has changed */
2105 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2106 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2109 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2110 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2111 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2114 if (slave
== oldcurrent
) {
2122 slave
->link
= BOND_LINK_UP
;
2123 slave
->jiffies
= jiffies
;
2124 printk(KERN_INFO DRV_NAME
2125 ": %s: link status up again after %d "
2126 "ms for interface %s.\n",
2128 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2132 case BOND_LINK_DOWN
: /* the link was down */
2133 if (link_state
!= BMSR_LSTATUS
) {
2134 /* the link stays down, nothing more to do */
2136 } else { /* link going up */
2137 slave
->link
= BOND_LINK_BACK
;
2138 slave
->delay
= bond
->params
.updelay
;
2140 if (bond
->params
.updelay
) {
2141 /* if updelay == 0, no need to
2142 advertise about a 0 ms delay */
2143 printk(KERN_INFO DRV_NAME
2144 ": %s: link status up for "
2145 "interface %s, enabling it "
2149 bond
->params
.updelay
* bond
->params
.miimon
);
2152 /* no break ! fall through the BOND_LINK_BACK state in
2153 case there's something to do.
2155 case BOND_LINK_BACK
: /* the link has just come back */
2156 if (link_state
!= BMSR_LSTATUS
) {
2157 /* link down again */
2158 slave
->link
= BOND_LINK_DOWN
;
2160 printk(KERN_INFO DRV_NAME
2161 ": %s: link status down again after %d "
2162 "ms for interface %s.\n",
2164 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2168 if (slave
->delay
== 0) {
2169 /* now the link has been up for long time enough */
2170 slave
->link
= BOND_LINK_UP
;
2171 slave
->jiffies
= jiffies
;
2173 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2174 /* prevent it from being the active one */
2175 slave
->state
= BOND_STATE_BACKUP
;
2176 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2177 /* make it immediately active */
2178 slave
->state
= BOND_STATE_ACTIVE
;
2179 } else if (slave
!= bond
->primary_slave
) {
2180 /* prevent it from being the active one */
2181 slave
->state
= BOND_STATE_BACKUP
;
2184 printk(KERN_INFO DRV_NAME
2185 ": %s: link status definitely "
2186 "up for interface %s.\n",
2190 /* notify ad that the link status has changed */
2191 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2192 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2195 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2196 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2197 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2200 if ((!oldcurrent
) ||
2201 (slave
== bond
->primary_slave
)) {
2210 /* Should not happen */
2211 printk(KERN_ERR DRV_NAME
2212 ": %s: Error: %s Illegal value (link=%d)\n",
2217 } /* end of switch (slave->link) */
2219 bond_update_speed_duplex(slave
);
2221 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2222 if (old_speed
!= slave
->speed
) {
2223 bond_3ad_adapter_speed_changed(slave
);
2226 if (old_duplex
!= slave
->duplex
) {
2227 bond_3ad_adapter_duplex_changed(slave
);
2234 write_lock(&bond
->curr_slave_lock
);
2236 bond_select_active_slave(bond
);
2238 write_unlock(&bond
->curr_slave_lock
);
2240 bond_set_carrier(bond
);
2243 if (bond
->params
.miimon
) {
2244 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2247 read_unlock(&bond
->lock
);
2251 static u32
bond_glean_dev_ip(struct net_device
*dev
)
2253 struct in_device
*idev
;
2254 struct in_ifaddr
*ifa
;
2261 idev
= __in_dev_get_rcu(dev
);
2265 ifa
= idev
->ifa_list
;
2269 addr
= ifa
->ifa_local
;
2275 static int bond_has_ip(struct bonding
*bond
)
2277 struct vlan_entry
*vlan
, *vlan_next
;
2279 if (bond
->master_ip
)
2282 if (list_empty(&bond
->vlan_list
))
2285 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2294 static int bond_has_this_ip(struct bonding
*bond
, u32 ip
)
2296 struct vlan_entry
*vlan
, *vlan_next
;
2298 if (ip
== bond
->master_ip
)
2301 if (list_empty(&bond
->vlan_list
))
2304 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2306 if (ip
== vlan
->vlan_ip
)
2314 * We go to the (large) trouble of VLAN tagging ARP frames because
2315 * switches in VLAN mode (especially if ports are configured as
2316 * "native" to a VLAN) might not pass non-tagged frames.
2318 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, u32 dest_ip
, u32 src_ip
, unsigned short vlan_id
)
2320 struct sk_buff
*skb
;
2322 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2323 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2325 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2326 NULL
, slave_dev
->dev_addr
, NULL
);
2329 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2333 skb
= vlan_put_tag(skb
, vlan_id
);
2335 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2343 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2346 u32
*targets
= bond
->params
.arp_targets
;
2347 struct vlan_entry
*vlan
, *vlan_next
;
2348 struct net_device
*vlan_dev
;
2352 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2355 dprintk("basa: target %x\n", targets
[i
]);
2356 if (list_empty(&bond
->vlan_list
)) {
2357 dprintk("basa: empty vlan: arp_send\n");
2358 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2359 bond
->master_ip
, 0);
2364 * If VLANs are configured, we do a route lookup to
2365 * determine which VLAN interface would be used, so we
2366 * can tag the ARP with the proper VLAN tag.
2368 memset(&fl
, 0, sizeof(fl
));
2369 fl
.fl4_dst
= targets
[i
];
2370 fl
.fl4_tos
= RTO_ONLINK
;
2372 rv
= ip_route_output_key(&rt
, &fl
);
2374 if (net_ratelimit()) {
2375 printk(KERN_WARNING DRV_NAME
2376 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2377 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2383 * This target is not on a VLAN
2385 if (rt
->u
.dst
.dev
== bond
->dev
) {
2387 dprintk("basa: rtdev == bond->dev: arp_send\n");
2388 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2389 bond
->master_ip
, 0);
2394 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2396 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
2397 if (vlan_dev
== rt
->u
.dst
.dev
) {
2398 vlan_id
= vlan
->vlan_id
;
2399 dprintk("basa: vlan match on %s %d\n",
2400 vlan_dev
->name
, vlan_id
);
2407 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2408 vlan
->vlan_ip
, vlan_id
);
2412 if (net_ratelimit()) {
2413 printk(KERN_WARNING DRV_NAME
2414 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2415 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2416 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2423 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2424 * for each VLAN above us.
2426 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2428 struct slave
*slave
= bond
->curr_active_slave
;
2429 struct vlan_entry
*vlan
;
2430 struct net_device
*vlan_dev
;
2432 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2433 slave
? slave
->dev
->name
: "NULL");
2437 if (bond
->master_ip
) {
2438 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2439 bond
->master_ip
, 0);
2442 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2443 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
2444 if (vlan
->vlan_ip
) {
2445 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2446 vlan
->vlan_ip
, vlan
->vlan_id
);
2451 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, u32 sip
, u32 tip
)
2454 u32
*targets
= bond
->params
.arp_targets
;
2456 targets
= bond
->params
.arp_targets
;
2457 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2458 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2459 "%u.%u.%u.%u bhti(tip) %d\n",
2460 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2461 bond_has_this_ip(bond
, tip
));
2462 if (sip
== targets
[i
]) {
2463 if (bond_has_this_ip(bond
, tip
))
2464 slave
->last_arp_rx
= jiffies
;
2470 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2473 struct slave
*slave
;
2474 struct bonding
*bond
;
2475 unsigned char *arp_ptr
;
2478 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2482 read_lock(&bond
->lock
);
2484 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2485 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2486 orig_dev
? orig_dev
->name
: "NULL");
2488 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2489 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2492 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2493 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2494 (2 * dev
->addr_len
) +
2495 (2 * sizeof(u32
)))))
2499 if (arp
->ar_hln
!= dev
->addr_len
||
2500 skb
->pkt_type
== PACKET_OTHERHOST
||
2501 skb
->pkt_type
== PACKET_LOOPBACK
||
2502 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2503 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2507 arp_ptr
= (unsigned char *)(arp
+ 1);
2508 arp_ptr
+= dev
->addr_len
;
2509 memcpy(&sip
, arp_ptr
, 4);
2510 arp_ptr
+= 4 + dev
->addr_len
;
2511 memcpy(&tip
, arp_ptr
, 4);
2513 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2514 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2515 slave
->state
, bond
->params
.arp_validate
,
2516 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2519 * Backup slaves won't see the ARP reply, but do come through
2520 * here for each ARP probe (so we swap the sip/tip to validate
2521 * the probe). In a "redundant switch, common router" type of
2522 * configuration, the ARP probe will (hopefully) travel from
2523 * the active, through one switch, the router, then the other
2524 * switch before reaching the backup.
2526 if (slave
->state
== BOND_STATE_ACTIVE
)
2527 bond_validate_arp(bond
, slave
, sip
, tip
);
2529 bond_validate_arp(bond
, slave
, tip
, sip
);
2532 read_unlock(&bond
->lock
);
2535 return NET_RX_SUCCESS
;
2539 * this function is called regularly to monitor each slave's link
2540 * ensuring that traffic is being sent and received when arp monitoring
2541 * is used in load-balancing mode. if the adapter has been dormant, then an
2542 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2543 * arp monitoring in active backup mode.
2545 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2547 struct bonding
*bond
= bond_dev
->priv
;
2548 struct slave
*slave
, *oldcurrent
;
2549 int do_failover
= 0;
2553 read_lock(&bond
->lock
);
2555 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2557 if (bond
->kill_timers
) {
2561 if (bond
->slave_cnt
== 0) {
2565 read_lock(&bond
->curr_slave_lock
);
2566 oldcurrent
= bond
->curr_active_slave
;
2567 read_unlock(&bond
->curr_slave_lock
);
2569 /* see if any of the previous devices are up now (i.e. they have
2570 * xmt and rcv traffic). the curr_active_slave does not come into
2571 * the picture unless it is null. also, slave->jiffies is not needed
2572 * here because we send an arp on each slave and give a slave as
2573 * long as it needs to get the tx/rx within the delta.
2574 * TODO: what about up/down delay in arp mode? it wasn't here before
2577 bond_for_each_slave(bond
, slave
, i
) {
2578 if (slave
->link
!= BOND_LINK_UP
) {
2579 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2580 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2582 slave
->link
= BOND_LINK_UP
;
2583 slave
->state
= BOND_STATE_ACTIVE
;
2585 /* primary_slave has no meaning in round-robin
2586 * mode. the window of a slave being up and
2587 * curr_active_slave being null after enslaving
2591 printk(KERN_INFO DRV_NAME
2592 ": %s: link status definitely "
2593 "up for interface %s, ",
2598 printk(KERN_INFO DRV_NAME
2599 ": %s: interface %s is now up\n",
2605 /* slave->link == BOND_LINK_UP */
2607 /* not all switches will respond to an arp request
2608 * when the source ip is 0, so don't take the link down
2609 * if we don't know our ip yet
2611 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2612 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2613 bond_has_ip(bond
))) {
2615 slave
->link
= BOND_LINK_DOWN
;
2616 slave
->state
= BOND_STATE_BACKUP
;
2618 if (slave
->link_failure_count
< UINT_MAX
) {
2619 slave
->link_failure_count
++;
2622 printk(KERN_INFO DRV_NAME
2623 ": %s: interface %s is now down.\n",
2627 if (slave
== oldcurrent
) {
2633 /* note: if switch is in round-robin mode, all links
2634 * must tx arp to ensure all links rx an arp - otherwise
2635 * links may oscillate or not come up at all; if switch is
2636 * in something like xor mode, there is nothing we can
2637 * do - all replies will be rx'ed on same link causing slaves
2638 * to be unstable during low/no traffic periods
2640 if (IS_UP(slave
->dev
)) {
2641 bond_arp_send_all(bond
, slave
);
2646 write_lock(&bond
->curr_slave_lock
);
2648 bond_select_active_slave(bond
);
2650 write_unlock(&bond
->curr_slave_lock
);
2654 if (bond
->params
.arp_interval
) {
2655 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2658 read_unlock(&bond
->lock
);
2662 * When using arp monitoring in active-backup mode, this function is
2663 * called to determine if any backup slaves have went down or a new
2664 * current slave needs to be found.
2665 * The backup slaves never generate traffic, they are considered up by merely
2666 * receiving traffic. If the current slave goes down, each backup slave will
2667 * be given the opportunity to tx/rx an arp before being taken down - this
2668 * prevents all slaves from being taken down due to the current slave not
2669 * sending any traffic for the backups to receive. The arps are not necessarily
2670 * necessary, any tx and rx traffic will keep the current slave up. While any
2671 * rx traffic will keep the backup slaves up, the current slave is responsible
2672 * for generating traffic to keep them up regardless of any other traffic they
2673 * may have received.
2674 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2676 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2678 struct bonding
*bond
= bond_dev
->priv
;
2679 struct slave
*slave
;
2683 read_lock(&bond
->lock
);
2685 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2687 if (bond
->kill_timers
) {
2691 if (bond
->slave_cnt
== 0) {
2695 /* determine if any slave has come up or any backup slave has
2697 * TODO: what about up/down delay in arp mode? it wasn't here before
2700 bond_for_each_slave(bond
, slave
, i
) {
2701 if (slave
->link
!= BOND_LINK_UP
) {
2702 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2705 slave
->link
= BOND_LINK_UP
;
2707 write_lock(&bond
->curr_slave_lock
);
2709 if ((!bond
->curr_active_slave
) &&
2710 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2711 bond_change_active_slave(bond
, slave
);
2712 bond
->current_arp_slave
= NULL
;
2713 } else if (bond
->curr_active_slave
!= slave
) {
2714 /* this slave has just come up but we
2715 * already have a current slave; this
2716 * can also happen if bond_enslave adds
2717 * a new slave that is up while we are
2718 * searching for a new slave
2720 bond_set_slave_inactive_flags(slave
);
2721 bond
->current_arp_slave
= NULL
;
2724 bond_set_carrier(bond
);
2726 if (slave
== bond
->curr_active_slave
) {
2727 printk(KERN_INFO DRV_NAME
2728 ": %s: %s is up and now the "
2729 "active interface\n",
2732 netif_carrier_on(bond
->dev
);
2734 printk(KERN_INFO DRV_NAME
2735 ": %s: backup interface %s is "
2741 write_unlock(&bond
->curr_slave_lock
);
2744 read_lock(&bond
->curr_slave_lock
);
2746 if ((slave
!= bond
->curr_active_slave
) &&
2747 (!bond
->current_arp_slave
) &&
2748 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2749 bond_has_ip(bond
))) {
2750 /* a backup slave has gone down; three times
2751 * the delta allows the current slave to be
2752 * taken out before the backup slave.
2753 * note: a non-null current_arp_slave indicates
2754 * the curr_active_slave went down and we are
2755 * searching for a new one; under this
2756 * condition we only take the curr_active_slave
2757 * down - this gives each slave a chance to
2758 * tx/rx traffic before being taken out
2761 read_unlock(&bond
->curr_slave_lock
);
2763 slave
->link
= BOND_LINK_DOWN
;
2765 if (slave
->link_failure_count
< UINT_MAX
) {
2766 slave
->link_failure_count
++;
2769 bond_set_slave_inactive_flags(slave
);
2771 printk(KERN_INFO DRV_NAME
2772 ": %s: backup interface %s is now down\n",
2776 read_unlock(&bond
->curr_slave_lock
);
2781 read_lock(&bond
->curr_slave_lock
);
2782 slave
= bond
->curr_active_slave
;
2783 read_unlock(&bond
->curr_slave_lock
);
2786 /* if we have sent traffic in the past 2*arp_intervals but
2787 * haven't xmit and rx traffic in that time interval, select
2788 * a different slave. slave->jiffies is only updated when
2789 * a slave first becomes the curr_active_slave - not necessarily
2790 * after every arp; this ensures the slave has a full 2*delta
2791 * before being taken out. if a primary is being used, check
2792 * if it is up and needs to take over as the curr_active_slave
2794 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2795 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2796 bond_has_ip(bond
))) &&
2797 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2799 slave
->link
= BOND_LINK_DOWN
;
2801 if (slave
->link_failure_count
< UINT_MAX
) {
2802 slave
->link_failure_count
++;
2805 printk(KERN_INFO DRV_NAME
2806 ": %s: link status down for active interface "
2807 "%s, disabling it\n",
2811 write_lock(&bond
->curr_slave_lock
);
2813 bond_select_active_slave(bond
);
2814 slave
= bond
->curr_active_slave
;
2816 write_unlock(&bond
->curr_slave_lock
);
2818 bond
->current_arp_slave
= slave
;
2821 slave
->jiffies
= jiffies
;
2823 } else if ((bond
->primary_slave
) &&
2824 (bond
->primary_slave
!= slave
) &&
2825 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2826 /* at this point, slave is the curr_active_slave */
2827 printk(KERN_INFO DRV_NAME
2828 ": %s: changing from interface %s to primary "
2832 bond
->primary_slave
->dev
->name
);
2834 /* primary is up so switch to it */
2835 write_lock(&bond
->curr_slave_lock
);
2836 bond_change_active_slave(bond
, bond
->primary_slave
);
2837 write_unlock(&bond
->curr_slave_lock
);
2839 slave
= bond
->primary_slave
;
2840 slave
->jiffies
= jiffies
;
2842 bond
->current_arp_slave
= NULL
;
2845 /* the current slave must tx an arp to ensure backup slaves
2848 if (slave
&& bond_has_ip(bond
)) {
2849 bond_arp_send_all(bond
, slave
);
2853 /* if we don't have a curr_active_slave, search for the next available
2854 * backup slave from the current_arp_slave and make it the candidate
2855 * for becoming the curr_active_slave
2858 if (!bond
->current_arp_slave
) {
2859 bond
->current_arp_slave
= bond
->first_slave
;
2862 if (bond
->current_arp_slave
) {
2863 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2865 /* search for next candidate */
2866 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2867 if (IS_UP(slave
->dev
)) {
2868 slave
->link
= BOND_LINK_BACK
;
2869 bond_set_slave_active_flags(slave
);
2870 bond_arp_send_all(bond
, slave
);
2871 slave
->jiffies
= jiffies
;
2872 bond
->current_arp_slave
= slave
;
2876 /* if the link state is up at this point, we
2877 * mark it down - this can happen if we have
2878 * simultaneous link failures and
2879 * reselect_active_interface doesn't make this
2880 * one the current slave so it is still marked
2881 * up when it is actually down
2883 if (slave
->link
== BOND_LINK_UP
) {
2884 slave
->link
= BOND_LINK_DOWN
;
2885 if (slave
->link_failure_count
< UINT_MAX
) {
2886 slave
->link_failure_count
++;
2889 bond_set_slave_inactive_flags(slave
);
2891 printk(KERN_INFO DRV_NAME
2892 ": %s: backup interface %s is "
2902 if (bond
->params
.arp_interval
) {
2903 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2906 read_unlock(&bond
->lock
);
2909 /*------------------------------ proc/seq_file-------------------------------*/
2911 #ifdef CONFIG_PROC_FS
2913 #define SEQ_START_TOKEN ((void *)1)
2915 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2917 struct bonding
*bond
= seq
->private;
2919 struct slave
*slave
;
2922 /* make sure the bond won't be taken away */
2923 read_lock(&dev_base_lock
);
2924 read_lock_bh(&bond
->lock
);
2927 return SEQ_START_TOKEN
;
2930 bond_for_each_slave(bond
, slave
, i
) {
2931 if (++off
== *pos
) {
2939 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2941 struct bonding
*bond
= seq
->private;
2942 struct slave
*slave
= v
;
2945 if (v
== SEQ_START_TOKEN
) {
2946 return bond
->first_slave
;
2949 slave
= slave
->next
;
2951 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2954 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2956 struct bonding
*bond
= seq
->private;
2958 read_unlock_bh(&bond
->lock
);
2959 read_unlock(&dev_base_lock
);
2962 static void bond_info_show_master(struct seq_file
*seq
)
2964 struct bonding
*bond
= seq
->private;
2969 read_lock(&bond
->curr_slave_lock
);
2970 curr
= bond
->curr_active_slave
;
2971 read_unlock(&bond
->curr_slave_lock
);
2973 seq_printf(seq
, "Bonding Mode: %s\n",
2974 bond_mode_name(bond
->params
.mode
));
2976 if (bond
->params
.mode
== BOND_MODE_XOR
||
2977 bond
->params
.mode
== BOND_MODE_8023AD
) {
2978 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2979 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2980 bond
->params
.xmit_policy
);
2983 if (USES_PRIMARY(bond
->params
.mode
)) {
2984 seq_printf(seq
, "Primary Slave: %s\n",
2985 (bond
->primary_slave
) ?
2986 bond
->primary_slave
->dev
->name
: "None");
2988 seq_printf(seq
, "Currently Active Slave: %s\n",
2989 (curr
) ? curr
->dev
->name
: "None");
2992 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
2994 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
2995 seq_printf(seq
, "Up Delay (ms): %d\n",
2996 bond
->params
.updelay
* bond
->params
.miimon
);
2997 seq_printf(seq
, "Down Delay (ms): %d\n",
2998 bond
->params
.downdelay
* bond
->params
.miimon
);
3001 /* ARP information */
3002 if(bond
->params
.arp_interval
> 0) {
3004 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3005 bond
->params
.arp_interval
);
3007 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3009 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3010 if (!bond
->params
.arp_targets
[i
])
3013 seq_printf(seq
, ",");
3014 target
= ntohl(bond
->params
.arp_targets
[i
]);
3015 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3018 seq_printf(seq
, "\n");
3021 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3022 struct ad_info ad_info
;
3024 seq_puts(seq
, "\n802.3ad info\n");
3025 seq_printf(seq
, "LACP rate: %s\n",
3026 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3028 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3029 seq_printf(seq
, "bond %s has no active aggregator\n",
3032 seq_printf(seq
, "Active Aggregator Info:\n");
3034 seq_printf(seq
, "\tAggregator ID: %d\n",
3035 ad_info
.aggregator_id
);
3036 seq_printf(seq
, "\tNumber of ports: %d\n",
3038 seq_printf(seq
, "\tActor Key: %d\n",
3040 seq_printf(seq
, "\tPartner Key: %d\n",
3041 ad_info
.partner_key
);
3042 seq_printf(seq
, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
3043 ad_info
.partner_system
[0],
3044 ad_info
.partner_system
[1],
3045 ad_info
.partner_system
[2],
3046 ad_info
.partner_system
[3],
3047 ad_info
.partner_system
[4],
3048 ad_info
.partner_system
[5]);
3053 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3055 struct bonding
*bond
= seq
->private;
3057 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3058 seq_printf(seq
, "MII Status: %s\n",
3059 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3060 seq_printf(seq
, "Link Failure Count: %u\n",
3061 slave
->link_failure_count
);
3064 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
3065 slave
->perm_hwaddr
[0], slave
->perm_hwaddr
[1],
3066 slave
->perm_hwaddr
[2], slave
->perm_hwaddr
[3],
3067 slave
->perm_hwaddr
[4], slave
->perm_hwaddr
[5]);
3069 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3070 const struct aggregator
*agg
3071 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3074 seq_printf(seq
, "Aggregator ID: %d\n",
3075 agg
->aggregator_identifier
);
3077 seq_puts(seq
, "Aggregator ID: N/A\n");
3082 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3084 if (v
== SEQ_START_TOKEN
) {
3085 seq_printf(seq
, "%s\n", version
);
3086 bond_info_show_master(seq
);
3088 bond_info_show_slave(seq
, v
);
3094 static struct seq_operations bond_info_seq_ops
= {
3095 .start
= bond_info_seq_start
,
3096 .next
= bond_info_seq_next
,
3097 .stop
= bond_info_seq_stop
,
3098 .show
= bond_info_seq_show
,
3101 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3103 struct seq_file
*seq
;
3104 struct proc_dir_entry
*proc
;
3107 res
= seq_open(file
, &bond_info_seq_ops
);
3109 /* recover the pointer buried in proc_dir_entry data */
3110 seq
= file
->private_data
;
3112 seq
->private = proc
->data
;
3118 static struct file_operations bond_info_fops
= {
3119 .owner
= THIS_MODULE
,
3120 .open
= bond_info_open
,
3122 .llseek
= seq_lseek
,
3123 .release
= seq_release
,
3126 static int bond_create_proc_entry(struct bonding
*bond
)
3128 struct net_device
*bond_dev
= bond
->dev
;
3130 if (bond_proc_dir
) {
3131 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3134 if (bond
->proc_entry
== NULL
) {
3135 printk(KERN_WARNING DRV_NAME
3136 ": Warning: Cannot create /proc/net/%s/%s\n",
3137 DRV_NAME
, bond_dev
->name
);
3139 bond
->proc_entry
->data
= bond
;
3140 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3141 bond
->proc_entry
->owner
= THIS_MODULE
;
3142 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3149 static void bond_remove_proc_entry(struct bonding
*bond
)
3151 if (bond_proc_dir
&& bond
->proc_entry
) {
3152 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3153 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3154 bond
->proc_entry
= NULL
;
3158 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3159 * Caller must hold rtnl_lock.
3161 static void bond_create_proc_dir(void)
3163 int len
= strlen(DRV_NAME
);
3165 for (bond_proc_dir
= proc_net
->subdir
; bond_proc_dir
;
3166 bond_proc_dir
= bond_proc_dir
->next
) {
3167 if ((bond_proc_dir
->namelen
== len
) &&
3168 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3173 if (!bond_proc_dir
) {
3174 bond_proc_dir
= proc_mkdir(DRV_NAME
, proc_net
);
3175 if (bond_proc_dir
) {
3176 bond_proc_dir
->owner
= THIS_MODULE
;
3178 printk(KERN_WARNING DRV_NAME
3179 ": Warning: cannot create /proc/net/%s\n",
3185 /* Destroy the bonding directory under /proc/net, if empty.
3186 * Caller must hold rtnl_lock.
3188 static void bond_destroy_proc_dir(void)
3190 struct proc_dir_entry
*de
;
3192 if (!bond_proc_dir
) {
3196 /* verify that the /proc dir is empty */
3197 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3198 /* ignore . and .. */
3199 if (*(de
->name
) != '.') {
3205 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3206 bond_proc_dir
->owner
= NULL
;
3209 remove_proc_entry(DRV_NAME
, proc_net
);
3210 bond_proc_dir
= NULL
;
3213 #endif /* CONFIG_PROC_FS */
3215 /*-------------------------- netdev event handling --------------------------*/
3218 * Change device name
3220 static int bond_event_changename(struct bonding
*bond
)
3222 #ifdef CONFIG_PROC_FS
3223 bond_remove_proc_entry(bond
);
3224 bond_create_proc_entry(bond
);
3226 down_write(&(bonding_rwsem
));
3227 bond_destroy_sysfs_entry(bond
);
3228 bond_create_sysfs_entry(bond
);
3229 up_write(&(bonding_rwsem
));
3233 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3235 struct bonding
*event_bond
= bond_dev
->priv
;
3238 case NETDEV_CHANGENAME
:
3239 return bond_event_changename(event_bond
);
3240 case NETDEV_UNREGISTER
:
3242 * TODO: remove a bond from the list?
3252 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3254 struct net_device
*bond_dev
= slave_dev
->master
;
3255 struct bonding
*bond
= bond_dev
->priv
;
3258 case NETDEV_UNREGISTER
:
3260 bond_release(bond_dev
, slave_dev
);
3265 * TODO: is this what we get if somebody
3266 * sets up a hierarchical bond, then rmmod's
3267 * one of the slave bonding devices?
3272 * ... Or is it this?
3275 case NETDEV_CHANGEMTU
:
3277 * TODO: Should slaves be allowed to
3278 * independently alter their MTU? For
3279 * an active-backup bond, slaves need
3280 * not be the same type of device, so
3281 * MTUs may vary. For other modes,
3282 * slaves arguably should have the
3283 * same MTUs. To do this, we'd need to
3284 * take over the slave's change_mtu
3285 * function for the duration of their
3289 case NETDEV_CHANGENAME
:
3291 * TODO: handle changing the primary's name
3294 case NETDEV_FEAT_CHANGE
:
3295 bond_compute_features(bond
);
3305 * bond_netdev_event: handle netdev notifier chain events.
3307 * This function receives events for the netdev chain. The caller (an
3308 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3309 * locks for us to safely manipulate the slave devices (RTNL lock,
3312 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3314 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3316 dprintk("event_dev: %s, event: %lx\n",
3317 (event_dev
? event_dev
->name
: "None"),
3320 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3323 if (event_dev
->flags
& IFF_MASTER
) {
3324 dprintk("IFF_MASTER\n");
3325 return bond_master_netdev_event(event
, event_dev
);
3328 if (event_dev
->flags
& IFF_SLAVE
) {
3329 dprintk("IFF_SLAVE\n");
3330 return bond_slave_netdev_event(event
, event_dev
);
3337 * bond_inetaddr_event: handle inetaddr notifier chain events.
3339 * We keep track of device IPs primarily to use as source addresses in
3340 * ARP monitor probes (rather than spewing out broadcasts all the time).
3342 * We track one IP for the main device (if it has one), plus one per VLAN.
3344 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3346 struct in_ifaddr
*ifa
= ptr
;
3347 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3348 struct bonding
*bond
, *bond_next
;
3349 struct vlan_entry
*vlan
, *vlan_next
;
3351 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3352 if (bond
->dev
== event_dev
) {
3355 bond
->master_ip
= ifa
->ifa_local
;
3358 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3365 if (list_empty(&bond
->vlan_list
))
3368 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3370 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
3371 if (vlan_dev
== event_dev
) {
3374 vlan
->vlan_ip
= ifa
->ifa_local
;
3378 bond_glean_dev_ip(vlan_dev
);
3389 static struct notifier_block bond_netdev_notifier
= {
3390 .notifier_call
= bond_netdev_event
,
3393 static struct notifier_block bond_inetaddr_notifier
= {
3394 .notifier_call
= bond_inetaddr_event
,
3397 /*-------------------------- Packet type handling ---------------------------*/
3399 /* register to receive lacpdus on a bond */
3400 static void bond_register_lacpdu(struct bonding
*bond
)
3402 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3404 /* initialize packet type */
3405 pk_type
->type
= PKT_TYPE_LACPDU
;
3406 pk_type
->dev
= bond
->dev
;
3407 pk_type
->func
= bond_3ad_lacpdu_recv
;
3409 dev_add_pack(pk_type
);
3412 /* unregister to receive lacpdus on a bond */
3413 static void bond_unregister_lacpdu(struct bonding
*bond
)
3415 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3418 void bond_register_arp(struct bonding
*bond
)
3420 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3422 pt
->type
= htons(ETH_P_ARP
);
3423 pt
->dev
= NULL
; /*bond->dev;XXX*/
3424 pt
->func
= bond_arp_rcv
;
3428 void bond_unregister_arp(struct bonding
*bond
)
3430 dev_remove_pack(&bond
->arp_mon_pt
);
3433 /*---------------------------- Hashing Policies -----------------------------*/
3436 * Hash for the the output device based upon layer 3 and layer 4 data. If
3437 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3438 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3440 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3441 struct net_device
*bond_dev
, int count
)
3443 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3444 struct iphdr
*iph
= skb
->nh
.iph
;
3445 u16
*layer4hdr
= (u16
*)((u32
*)iph
+ iph
->ihl
);
3448 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3449 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3450 (iph
->protocol
== IPPROTO_TCP
||
3451 iph
->protocol
== IPPROTO_UDP
)) {
3452 layer4_xor
= htons((*layer4hdr
^ *(layer4hdr
+ 1)));
3454 return (layer4_xor
^
3455 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3459 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3463 * Hash for the output device based upon layer 2 data
3465 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3466 struct net_device
*bond_dev
, int count
)
3468 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3470 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3473 /*-------------------------- Device entry points ----------------------------*/
3475 static int bond_open(struct net_device
*bond_dev
)
3477 struct bonding
*bond
= bond_dev
->priv
;
3478 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3479 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3481 bond
->kill_timers
= 0;
3483 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3484 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3485 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3487 /* bond_alb_initialize must be called before the timer
3490 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3491 /* something went wrong - fail the open operation */
3495 init_timer(alb_timer
);
3496 alb_timer
->expires
= jiffies
+ 1;
3497 alb_timer
->data
= (unsigned long)bond
;
3498 alb_timer
->function
= (void *)&bond_alb_monitor
;
3499 add_timer(alb_timer
);
3502 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3503 init_timer(mii_timer
);
3504 mii_timer
->expires
= jiffies
+ 1;
3505 mii_timer
->data
= (unsigned long)bond_dev
;
3506 mii_timer
->function
= (void *)&bond_mii_monitor
;
3507 add_timer(mii_timer
);
3510 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3511 init_timer(arp_timer
);
3512 arp_timer
->expires
= jiffies
+ 1;
3513 arp_timer
->data
= (unsigned long)bond_dev
;
3514 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3515 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3517 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3519 if (bond
->params
.arp_validate
)
3520 bond_register_arp(bond
);
3522 add_timer(arp_timer
);
3525 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3526 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3527 init_timer(ad_timer
);
3528 ad_timer
->expires
= jiffies
+ 1;
3529 ad_timer
->data
= (unsigned long)bond
;
3530 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3531 add_timer(ad_timer
);
3533 /* register to receive LACPDUs */
3534 bond_register_lacpdu(bond
);
3540 static int bond_close(struct net_device
*bond_dev
)
3542 struct bonding
*bond
= bond_dev
->priv
;
3544 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3545 /* Unregister the receive of LACPDUs */
3546 bond_unregister_lacpdu(bond
);
3549 if (bond
->params
.arp_validate
)
3550 bond_unregister_arp(bond
);
3552 write_lock_bh(&bond
->lock
);
3555 /* signal timers not to re-arm */
3556 bond
->kill_timers
= 1;
3558 write_unlock_bh(&bond
->lock
);
3560 /* del_timer_sync must run without holding the bond->lock
3561 * because a running timer might be trying to hold it too
3564 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3565 del_timer_sync(&bond
->mii_timer
);
3568 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3569 del_timer_sync(&bond
->arp_timer
);
3572 switch (bond
->params
.mode
) {
3573 case BOND_MODE_8023AD
:
3574 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3578 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3585 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3586 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3587 /* Must be called only after all
3588 * slaves have been released
3590 bond_alb_deinitialize(bond
);
3596 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3598 struct bonding
*bond
= bond_dev
->priv
;
3599 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3600 struct slave
*slave
;
3603 memset(stats
, 0, sizeof(struct net_device_stats
));
3605 read_lock_bh(&bond
->lock
);
3607 bond_for_each_slave(bond
, slave
, i
) {
3608 sstats
= slave
->dev
->get_stats(slave
->dev
);
3610 stats
->rx_packets
+= sstats
->rx_packets
;
3611 stats
->rx_bytes
+= sstats
->rx_bytes
;
3612 stats
->rx_errors
+= sstats
->rx_errors
;
3613 stats
->rx_dropped
+= sstats
->rx_dropped
;
3615 stats
->tx_packets
+= sstats
->tx_packets
;
3616 stats
->tx_bytes
+= sstats
->tx_bytes
;
3617 stats
->tx_errors
+= sstats
->tx_errors
;
3618 stats
->tx_dropped
+= sstats
->tx_dropped
;
3620 stats
->multicast
+= sstats
->multicast
;
3621 stats
->collisions
+= sstats
->collisions
;
3623 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3624 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3625 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3626 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3627 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3628 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3630 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3631 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3632 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3633 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3634 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3637 read_unlock_bh(&bond
->lock
);
3642 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3644 struct net_device
*slave_dev
= NULL
;
3645 struct ifbond k_binfo
;
3646 struct ifbond __user
*u_binfo
= NULL
;
3647 struct ifslave k_sinfo
;
3648 struct ifslave __user
*u_sinfo
= NULL
;
3649 struct mii_ioctl_data
*mii
= NULL
;
3652 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3653 bond_dev
->name
, cmd
);
3665 * We do this again just in case we were called by SIOCGMIIREG
3666 * instead of SIOCGMIIPHY.
3673 if (mii
->reg_num
== 1) {
3674 struct bonding
*bond
= bond_dev
->priv
;
3676 read_lock_bh(&bond
->lock
);
3677 read_lock(&bond
->curr_slave_lock
);
3678 if (bond
->curr_active_slave
) {
3679 mii
->val_out
= BMSR_LSTATUS
;
3681 read_unlock(&bond
->curr_slave_lock
);
3682 read_unlock_bh(&bond
->lock
);
3686 case BOND_INFO_QUERY_OLD
:
3687 case SIOCBONDINFOQUERY
:
3688 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3690 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3694 res
= bond_info_query(bond_dev
, &k_binfo
);
3696 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3702 case BOND_SLAVE_INFO_QUERY_OLD
:
3703 case SIOCBONDSLAVEINFOQUERY
:
3704 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3706 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3710 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3712 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3723 if (!capable(CAP_NET_ADMIN
)) {
3727 down_write(&(bonding_rwsem
));
3728 slave_dev
= dev_get_by_name(ifr
->ifr_slave
);
3730 dprintk("slave_dev=%p: \n", slave_dev
);
3735 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3737 case BOND_ENSLAVE_OLD
:
3738 case SIOCBONDENSLAVE
:
3739 res
= bond_enslave(bond_dev
, slave_dev
);
3741 case BOND_RELEASE_OLD
:
3742 case SIOCBONDRELEASE
:
3743 res
= bond_release(bond_dev
, slave_dev
);
3745 case BOND_SETHWADDR_OLD
:
3746 case SIOCBONDSETHWADDR
:
3747 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3749 case BOND_CHANGE_ACTIVE_OLD
:
3750 case SIOCBONDCHANGEACTIVE
:
3751 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3760 up_write(&(bonding_rwsem
));
3764 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3766 struct bonding
*bond
= bond_dev
->priv
;
3767 struct dev_mc_list
*dmi
;
3769 write_lock_bh(&bond
->lock
);
3772 * Do promisc before checking multicast_mode
3774 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3775 bond_set_promiscuity(bond
, 1);
3778 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3779 bond_set_promiscuity(bond
, -1);
3782 /* set allmulti flag to slaves */
3783 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3784 bond_set_allmulti(bond
, 1);
3787 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3788 bond_set_allmulti(bond
, -1);
3791 bond
->flags
= bond_dev
->flags
;
3793 /* looking for addresses to add to slaves' mc list */
3794 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3795 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3796 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3800 /* looking for addresses to delete from slaves' list */
3801 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3802 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3803 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3807 /* save master's multicast list */
3808 bond_mc_list_destroy(bond
);
3809 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3811 write_unlock_bh(&bond
->lock
);
3815 * Change the MTU of all of a master's slaves to match the master
3817 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3819 struct bonding
*bond
= bond_dev
->priv
;
3820 struct slave
*slave
, *stop_at
;
3824 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3825 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3827 /* Can't hold bond->lock with bh disabled here since
3828 * some base drivers panic. On the other hand we can't
3829 * hold bond->lock without bh disabled because we'll
3830 * deadlock. The only solution is to rely on the fact
3831 * that we're under rtnl_lock here, and the slaves
3832 * list won't change. This doesn't solve the problem
3833 * of setting the slave's MTU while it is
3834 * transmitting, but the assumption is that the base
3835 * driver can handle that.
3837 * TODO: figure out a way to safely iterate the slaves
3838 * list, but without holding a lock around the actual
3839 * call to the base driver.
3842 bond_for_each_slave(bond
, slave
, i
) {
3843 dprintk("s %p s->p %p c_m %p\n", slave
,
3844 slave
->prev
, slave
->dev
->change_mtu
);
3846 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3849 /* If we failed to set the slave's mtu to the new value
3850 * we must abort the operation even in ACTIVE_BACKUP
3851 * mode, because if we allow the backup slaves to have
3852 * different mtu values than the active slave we'll
3853 * need to change their mtu when doing a failover. That
3854 * means changing their mtu from timer context, which
3855 * is probably not a good idea.
3857 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3862 bond_dev
->mtu
= new_mtu
;
3867 /* unwind from head to the slave that failed */
3869 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3872 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3874 dprintk("unwind err %d dev %s\n", tmp_res
,
3885 * Note that many devices must be down to change the HW address, and
3886 * downing the master releases all slaves. We can make bonds full of
3887 * bonding devices to test this, however.
3889 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3891 struct bonding
*bond
= bond_dev
->priv
;
3892 struct sockaddr
*sa
= addr
, tmp_sa
;
3893 struct slave
*slave
, *stop_at
;
3897 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3899 if (!is_valid_ether_addr(sa
->sa_data
)) {
3900 return -EADDRNOTAVAIL
;
3903 /* Can't hold bond->lock with bh disabled here since
3904 * some base drivers panic. On the other hand we can't
3905 * hold bond->lock without bh disabled because we'll
3906 * deadlock. The only solution is to rely on the fact
3907 * that we're under rtnl_lock here, and the slaves
3908 * list won't change. This doesn't solve the problem
3909 * of setting the slave's hw address while it is
3910 * transmitting, but the assumption is that the base
3911 * driver can handle that.
3913 * TODO: figure out a way to safely iterate the slaves
3914 * list, but without holding a lock around the actual
3915 * call to the base driver.
3918 bond_for_each_slave(bond
, slave
, i
) {
3919 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3921 if (slave
->dev
->set_mac_address
== NULL
) {
3923 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3927 res
= dev_set_mac_address(slave
->dev
, addr
);
3929 /* TODO: consider downing the slave
3931 * User should expect communications
3932 * breakage anyway until ARP finish
3935 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3941 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3945 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3946 tmp_sa
.sa_family
= bond_dev
->type
;
3948 /* unwind from head to the slave that failed */
3950 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3953 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3955 dprintk("unwind err %d dev %s\n", tmp_res
,
3963 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3965 struct bonding
*bond
= bond_dev
->priv
;
3966 struct slave
*slave
, *start_at
;
3970 read_lock(&bond
->lock
);
3972 if (!BOND_IS_OK(bond
)) {
3976 read_lock(&bond
->curr_slave_lock
);
3977 slave
= start_at
= bond
->curr_active_slave
;
3978 read_unlock(&bond
->curr_slave_lock
);
3984 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3985 if (IS_UP(slave
->dev
) &&
3986 (slave
->link
== BOND_LINK_UP
) &&
3987 (slave
->state
== BOND_STATE_ACTIVE
)) {
3988 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3990 write_lock(&bond
->curr_slave_lock
);
3991 bond
->curr_active_slave
= slave
->next
;
3992 write_unlock(&bond
->curr_slave_lock
);
4001 /* no suitable interface, frame not sent */
4004 read_unlock(&bond
->lock
);
4008 static void bond_activebackup_xmit_copy(struct sk_buff
*skb
,
4009 struct bonding
*bond
,
4010 struct slave
*slave
)
4012 struct sk_buff
*skb2
= skb_copy(skb
, GFP_ATOMIC
);
4013 struct ethhdr
*eth_data
;
4018 printk(KERN_ERR DRV_NAME
": Error: "
4019 "bond_activebackup_xmit_copy(): skb_copy() failed\n");
4023 skb2
->mac
.raw
= (unsigned char *)skb2
->data
;
4024 eth_data
= eth_hdr(skb2
);
4026 /* Pick an appropriate source MAC address
4027 * -- use slave's perm MAC addr, unless used by bond
4028 * -- otherwise, borrow active slave's perm MAC addr
4029 * since that will not be used
4031 hwaddr
= slave
->perm_hwaddr
;
4032 if (!memcmp(eth_data
->h_source
, hwaddr
, ETH_ALEN
))
4033 hwaddr
= bond
->curr_active_slave
->perm_hwaddr
;
4035 /* Set source MAC address appropriately */
4036 memcpy(eth_data
->h_source
, hwaddr
, ETH_ALEN
);
4038 res
= bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
4040 dev_kfree_skb(skb2
);
4046 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4047 * the bond has a usable interface.
4049 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4051 struct bonding
*bond
= bond_dev
->priv
;
4054 read_lock(&bond
->lock
);
4055 read_lock(&bond
->curr_slave_lock
);
4057 if (!BOND_IS_OK(bond
)) {
4061 if (!bond
->curr_active_slave
)
4064 /* Xmit IGMP frames on all slaves to ensure rapid fail-over
4065 for multicast traffic on snooping switches */
4066 if (skb
->protocol
== __constant_htons(ETH_P_IP
) &&
4067 skb
->nh
.iph
->protocol
== IPPROTO_IGMP
) {
4068 struct slave
*slave
, *active_slave
;
4071 active_slave
= bond
->curr_active_slave
;
4072 bond_for_each_slave_from_to(bond
, slave
, i
, active_slave
->next
,
4074 if (IS_UP(slave
->dev
) &&
4075 (slave
->link
== BOND_LINK_UP
))
4076 bond_activebackup_xmit_copy(skb
, bond
, slave
);
4079 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4083 /* no suitable interface, frame not sent */
4086 read_unlock(&bond
->curr_slave_lock
);
4087 read_unlock(&bond
->lock
);
4092 * In bond_xmit_xor() , we determine the output device by using a pre-
4093 * determined xmit_hash_policy(), If the selected device is not enabled,
4094 * find the next active slave.
4096 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4098 struct bonding
*bond
= bond_dev
->priv
;
4099 struct slave
*slave
, *start_at
;
4104 read_lock(&bond
->lock
);
4106 if (!BOND_IS_OK(bond
)) {
4110 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4112 bond_for_each_slave(bond
, slave
, i
) {
4121 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4122 if (IS_UP(slave
->dev
) &&
4123 (slave
->link
== BOND_LINK_UP
) &&
4124 (slave
->state
== BOND_STATE_ACTIVE
)) {
4125 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4132 /* no suitable interface, frame not sent */
4135 read_unlock(&bond
->lock
);
4140 * in broadcast mode, we send everything to all usable interfaces.
4142 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4144 struct bonding
*bond
= bond_dev
->priv
;
4145 struct slave
*slave
, *start_at
;
4146 struct net_device
*tx_dev
= NULL
;
4150 read_lock(&bond
->lock
);
4152 if (!BOND_IS_OK(bond
)) {
4156 read_lock(&bond
->curr_slave_lock
);
4157 start_at
= bond
->curr_active_slave
;
4158 read_unlock(&bond
->curr_slave_lock
);
4164 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4165 if (IS_UP(slave
->dev
) &&
4166 (slave
->link
== BOND_LINK_UP
) &&
4167 (slave
->state
== BOND_STATE_ACTIVE
)) {
4169 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4171 printk(KERN_ERR DRV_NAME
4172 ": %s: Error: bond_xmit_broadcast(): "
4173 "skb_clone() failed\n",
4178 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4180 dev_kfree_skb(skb2
);
4184 tx_dev
= slave
->dev
;
4189 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4194 /* no suitable interface, frame not sent */
4197 /* frame sent to all suitable interfaces */
4198 read_unlock(&bond
->lock
);
4202 /*------------------------- Device initialization ---------------------------*/
4205 * set bond mode specific net device operations
4207 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4209 struct net_device
*bond_dev
= bond
->dev
;
4212 case BOND_MODE_ROUNDROBIN
:
4213 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4215 case BOND_MODE_ACTIVEBACKUP
:
4216 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4219 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4220 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4221 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4223 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4225 case BOND_MODE_BROADCAST
:
4226 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4228 case BOND_MODE_8023AD
:
4229 bond_set_master_3ad_flags(bond
);
4230 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4231 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4232 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4234 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4237 bond_set_master_alb_flags(bond
);
4240 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4241 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4244 /* Should never happen, mode already checked */
4245 printk(KERN_ERR DRV_NAME
4246 ": %s: Error: Unknown bonding mode %d\n",
4253 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4254 struct ethtool_drvinfo
*drvinfo
)
4256 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4257 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4258 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4261 static const struct ethtool_ops bond_ethtool_ops
= {
4262 .get_tx_csum
= ethtool_op_get_tx_csum
,
4263 .get_tso
= ethtool_op_get_tso
,
4264 .get_ufo
= ethtool_op_get_ufo
,
4265 .get_sg
= ethtool_op_get_sg
,
4266 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4270 * Does not allocate but creates a /proc entry.
4273 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4275 struct bonding
*bond
= bond_dev
->priv
;
4277 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4279 /* initialize rwlocks */
4280 rwlock_init(&bond
->lock
);
4281 rwlock_init(&bond
->curr_slave_lock
);
4283 bond
->params
= *params
; /* copy params struct */
4285 /* Initialize pointers */
4286 bond
->first_slave
= NULL
;
4287 bond
->curr_active_slave
= NULL
;
4288 bond
->current_arp_slave
= NULL
;
4289 bond
->primary_slave
= NULL
;
4290 bond
->dev
= bond_dev
;
4291 INIT_LIST_HEAD(&bond
->vlan_list
);
4293 /* Initialize the device entry points */
4294 bond_dev
->open
= bond_open
;
4295 bond_dev
->stop
= bond_close
;
4296 bond_dev
->get_stats
= bond_get_stats
;
4297 bond_dev
->do_ioctl
= bond_do_ioctl
;
4298 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4299 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4300 bond_dev
->change_mtu
= bond_change_mtu
;
4301 bond_dev
->set_mac_address
= bond_set_mac_address
;
4303 bond_set_mode_ops(bond
, bond
->params
.mode
);
4305 bond_dev
->destructor
= free_netdev
;
4307 /* Initialize the device options */
4308 bond_dev
->tx_queue_len
= 0;
4309 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4310 bond_dev
->priv_flags
|= IFF_BONDING
;
4312 /* At first, we block adding VLANs. That's the only way to
4313 * prevent problems that occur when adding VLANs over an
4314 * empty bond. The block will be removed once non-challenged
4315 * slaves are enslaved.
4317 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4319 /* don't acquire bond device's netif_tx_lock when
4321 bond_dev
->features
|= NETIF_F_LLTX
;
4323 /* By default, we declare the bond to be fully
4324 * VLAN hardware accelerated capable. Special
4325 * care is taken in the various xmit functions
4326 * when there are slaves that are not hw accel
4329 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4330 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4331 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4332 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4333 NETIF_F_HW_VLAN_RX
|
4334 NETIF_F_HW_VLAN_FILTER
);
4336 #ifdef CONFIG_PROC_FS
4337 bond_create_proc_entry(bond
);
4340 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4345 /* De-initialize device specific data.
4346 * Caller must hold rtnl_lock.
4348 void bond_deinit(struct net_device
*bond_dev
)
4350 struct bonding
*bond
= bond_dev
->priv
;
4352 list_del(&bond
->bond_list
);
4354 #ifdef CONFIG_PROC_FS
4355 bond_remove_proc_entry(bond
);
4359 /* Unregister and free all bond devices.
4360 * Caller must hold rtnl_lock.
4362 static void bond_free_all(void)
4364 struct bonding
*bond
, *nxt
;
4366 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4367 struct net_device
*bond_dev
= bond
->dev
;
4369 bond_mc_list_destroy(bond
);
4370 /* Release the bonded slaves */
4371 bond_release_all(bond_dev
);
4372 unregister_netdevice(bond_dev
);
4373 bond_deinit(bond_dev
);
4376 #ifdef CONFIG_PROC_FS
4377 bond_destroy_proc_dir();
4381 /*------------------------- Module initialization ---------------------------*/
4384 * Convert string input module parms. Accept either the
4385 * number of the mode or its string name.
4387 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4391 for (i
= 0; tbl
[i
].modename
; i
++) {
4392 if ((isdigit(*mode_arg
) &&
4393 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4394 (strncmp(mode_arg
, tbl
[i
].modename
,
4395 strlen(tbl
[i
].modename
)) == 0)) {
4403 static int bond_check_params(struct bond_params
*params
)
4405 int arp_validate_value
;
4408 * Convert string parameters.
4411 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4412 if (bond_mode
== -1) {
4413 printk(KERN_ERR DRV_NAME
4414 ": Error: Invalid bonding mode \"%s\"\n",
4415 mode
== NULL
? "NULL" : mode
);
4420 if (xmit_hash_policy
) {
4421 if ((bond_mode
!= BOND_MODE_XOR
) &&
4422 (bond_mode
!= BOND_MODE_8023AD
)) {
4423 printk(KERN_INFO DRV_NAME
4424 ": xor_mode param is irrelevant in mode %s\n",
4425 bond_mode_name(bond_mode
));
4427 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4429 if (xmit_hashtype
== -1) {
4430 printk(KERN_ERR DRV_NAME
4431 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4432 xmit_hash_policy
== NULL
? "NULL" :
4440 if (bond_mode
!= BOND_MODE_8023AD
) {
4441 printk(KERN_INFO DRV_NAME
4442 ": lacp_rate param is irrelevant in mode %s\n",
4443 bond_mode_name(bond_mode
));
4445 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4446 if (lacp_fast
== -1) {
4447 printk(KERN_ERR DRV_NAME
4448 ": Error: Invalid lacp rate \"%s\"\n",
4449 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4455 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4456 printk(KERN_WARNING DRV_NAME
4457 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4458 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4459 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4460 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4464 printk(KERN_WARNING DRV_NAME
4465 ": Warning: miimon module parameter (%d), "
4466 "not in range 0-%d, so it was reset to %d\n",
4467 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4468 miimon
= BOND_LINK_MON_INTERV
;
4472 printk(KERN_WARNING DRV_NAME
4473 ": Warning: updelay module parameter (%d), "
4474 "not in range 0-%d, so it was reset to 0\n",
4479 if (downdelay
< 0) {
4480 printk(KERN_WARNING DRV_NAME
4481 ": Warning: downdelay module parameter (%d), "
4482 "not in range 0-%d, so it was reset to 0\n",
4483 downdelay
, INT_MAX
);
4487 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4488 printk(KERN_WARNING DRV_NAME
4489 ": Warning: use_carrier module parameter (%d), "
4490 "not of valid value (0/1), so it was set to 1\n",
4495 /* reset values for 802.3ad */
4496 if (bond_mode
== BOND_MODE_8023AD
) {
4498 printk(KERN_WARNING DRV_NAME
4499 ": Warning: miimon must be specified, "
4500 "otherwise bonding will not detect link "
4501 "failure, speed and duplex which are "
4502 "essential for 802.3ad operation\n");
4503 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4508 /* reset values for TLB/ALB */
4509 if ((bond_mode
== BOND_MODE_TLB
) ||
4510 (bond_mode
== BOND_MODE_ALB
)) {
4512 printk(KERN_WARNING DRV_NAME
4513 ": Warning: miimon must be specified, "
4514 "otherwise bonding will not detect link "
4515 "failure and link speed which are essential "
4516 "for TLB/ALB load balancing\n");
4517 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4522 if (bond_mode
== BOND_MODE_ALB
) {
4523 printk(KERN_NOTICE DRV_NAME
4524 ": In ALB mode you might experience client "
4525 "disconnections upon reconnection of a link if the "
4526 "bonding module updelay parameter (%d msec) is "
4527 "incompatible with the forwarding delay time of the "
4533 if (updelay
|| downdelay
) {
4534 /* just warn the user the up/down delay will have
4535 * no effect since miimon is zero...
4537 printk(KERN_WARNING DRV_NAME
4538 ": Warning: miimon module parameter not set "
4539 "and updelay (%d) or downdelay (%d) module "
4540 "parameter is set; updelay and downdelay have "
4541 "no effect unless miimon is set\n",
4542 updelay
, downdelay
);
4545 /* don't allow arp monitoring */
4547 printk(KERN_WARNING DRV_NAME
4548 ": Warning: miimon (%d) and arp_interval (%d) "
4549 "can't be used simultaneously, disabling ARP "
4551 miimon
, arp_interval
);
4555 if ((updelay
% miimon
) != 0) {
4556 printk(KERN_WARNING DRV_NAME
4557 ": Warning: updelay (%d) is not a multiple "
4558 "of miimon (%d), updelay rounded to %d ms\n",
4559 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4564 if ((downdelay
% miimon
) != 0) {
4565 printk(KERN_WARNING DRV_NAME
4566 ": Warning: downdelay (%d) is not a multiple "
4567 "of miimon (%d), downdelay rounded to %d ms\n",
4569 (downdelay
/ miimon
) * miimon
);
4572 downdelay
/= miimon
;
4575 if (arp_interval
< 0) {
4576 printk(KERN_WARNING DRV_NAME
4577 ": Warning: arp_interval module parameter (%d) "
4578 ", not in range 0-%d, so it was reset to %d\n",
4579 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4580 arp_interval
= BOND_LINK_ARP_INTERV
;
4583 for (arp_ip_count
= 0;
4584 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4586 /* not complete check, but should be good enough to
4588 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4589 printk(KERN_WARNING DRV_NAME
4590 ": Warning: bad arp_ip_target module parameter "
4591 "(%s), ARP monitoring will not be performed\n",
4592 arp_ip_target
[arp_ip_count
]);
4595 u32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4596 arp_target
[arp_ip_count
] = ip
;
4600 if (arp_interval
&& !arp_ip_count
) {
4601 /* don't allow arping if no arp_ip_target given... */
4602 printk(KERN_WARNING DRV_NAME
4603 ": Warning: arp_interval module parameter (%d) "
4604 "specified without providing an arp_ip_target "
4605 "parameter, arp_interval was reset to 0\n",
4611 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4612 printk(KERN_ERR DRV_NAME
4613 ": arp_validate only supported in active-backup mode\n");
4616 if (!arp_interval
) {
4617 printk(KERN_ERR DRV_NAME
4618 ": arp_validate requires arp_interval\n");
4622 arp_validate_value
= bond_parse_parm(arp_validate
,
4624 if (arp_validate_value
== -1) {
4625 printk(KERN_ERR DRV_NAME
4626 ": Error: invalid arp_validate \"%s\"\n",
4627 arp_validate
== NULL
? "NULL" : arp_validate
);
4631 arp_validate_value
= 0;
4634 printk(KERN_INFO DRV_NAME
4635 ": MII link monitoring set to %d ms\n",
4637 } else if (arp_interval
) {
4640 printk(KERN_INFO DRV_NAME
4641 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4643 arp_validate_tbl
[arp_validate_value
].modename
,
4646 for (i
= 0; i
< arp_ip_count
; i
++)
4647 printk (" %s", arp_ip_target
[i
]);
4652 /* miimon and arp_interval not set, we need one so things
4653 * work as expected, see bonding.txt for details
4655 printk(KERN_WARNING DRV_NAME
4656 ": Warning: either miimon or arp_interval and "
4657 "arp_ip_target module parameters must be specified, "
4658 "otherwise bonding will not detect link failures! see "
4659 "bonding.txt for details.\n");
4662 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4663 /* currently, using a primary only makes sense
4664 * in active backup, TLB or ALB modes
4666 printk(KERN_WARNING DRV_NAME
4667 ": Warning: %s primary device specified but has no "
4668 "effect in %s mode\n",
4669 primary
, bond_mode_name(bond_mode
));
4673 /* fill params struct with the proper values */
4674 params
->mode
= bond_mode
;
4675 params
->xmit_policy
= xmit_hashtype
;
4676 params
->miimon
= miimon
;
4677 params
->arp_interval
= arp_interval
;
4678 params
->arp_validate
= arp_validate_value
;
4679 params
->updelay
= updelay
;
4680 params
->downdelay
= downdelay
;
4681 params
->use_carrier
= use_carrier
;
4682 params
->lacp_fast
= lacp_fast
;
4683 params
->primary
[0] = 0;
4686 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4687 params
->primary
[IFNAMSIZ
- 1] = 0;
4690 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4695 /* Create a new bond based on the specified name and bonding parameters.
4696 * Caller must NOT hold rtnl_lock; we need to release it here before we
4697 * set up our sysfs entries.
4699 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4701 struct net_device
*bond_dev
;
4705 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
, ether_setup
);
4707 printk(KERN_ERR DRV_NAME
4708 ": %s: eek! can't alloc netdev!\n",
4714 /* bond_init() must be called after dev_alloc_name() (for the
4715 * /proc files), but before register_netdevice(), because we
4716 * need to set function pointers.
4719 res
= bond_init(bond_dev
, params
);
4724 SET_MODULE_OWNER(bond_dev
);
4726 res
= register_netdevice(bond_dev
);
4731 *newbond
= bond_dev
->priv
;
4733 netif_carrier_off(bond_dev
);
4735 rtnl_unlock(); /* allows sysfs registration of net device */
4736 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4739 bond_deinit(bond_dev
);
4741 free_netdev(bond_dev
);
4748 static int __init
bonding_init(void)
4752 char new_bond_name
[8]; /* Enough room for 999 bonds at init. */
4754 printk(KERN_INFO
"%s", version
);
4756 res
= bond_check_params(&bonding_defaults
);
4761 #ifdef CONFIG_PROC_FS
4762 bond_create_proc_dir();
4764 for (i
= 0; i
< max_bonds
; i
++) {
4765 sprintf(new_bond_name
, "bond%d",i
);
4766 res
= bond_create(new_bond_name
,&bonding_defaults
, NULL
);
4771 res
= bond_create_sysfs();
4775 register_netdevice_notifier(&bond_netdev_notifier
);
4776 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4782 bond_destroy_sysfs();
4789 static void __exit
bonding_exit(void)
4791 unregister_netdevice_notifier(&bond_netdev_notifier
);
4792 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4796 bond_destroy_sysfs();
4800 module_init(bonding_init
);
4801 module_exit(bonding_exit
);
4802 MODULE_LICENSE("GPL");
4803 MODULE_VERSION(DRV_VERSION
);
4804 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4805 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4806 MODULE_SUPPORTED_DEVICE("most ethernet devices");