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 if (slave_dev
->get_stats
== NULL
) {
1340 printk(KERN_NOTICE DRV_NAME
1341 ": %s: the driver for slave device %s does not provide "
1342 "get_stats function, network statistics will be "
1343 "inaccurate.\n", bond_dev
->name
, slave_dev
->name
);
1346 new_slave
= kmalloc(sizeof(struct slave
), GFP_KERNEL
);
1349 goto err_undo_flags
;
1352 memset(new_slave
, 0, sizeof(struct slave
));
1354 /* save slave's original flags before calling
1355 * netdev_set_master and dev_open
1357 new_slave
->original_flags
= slave_dev
->flags
;
1360 * Save slave's original ("permanent") mac address for modes
1361 * that need it, and for restoring it upon release, and then
1362 * set it to the master's address
1364 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1367 * Set slave to master's mac address. The application already
1368 * set the master's mac address to that of the first slave
1370 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1371 addr
.sa_family
= slave_dev
->type
;
1372 res
= dev_set_mac_address(slave_dev
, &addr
);
1374 dprintk("Error %d calling set_mac_address\n", res
);
1378 /* open the slave since the application closed it */
1379 res
= dev_open(slave_dev
);
1381 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1382 goto err_restore_mac
;
1385 res
= netdev_set_master(slave_dev
, bond_dev
);
1387 dprintk("Error %d calling netdev_set_master\n", res
);
1391 new_slave
->dev
= slave_dev
;
1392 slave_dev
->priv_flags
|= IFF_BONDING
;
1394 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1395 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1396 /* bond_alb_init_slave() must be called before all other stages since
1397 * it might fail and we do not want to have to undo everything
1399 res
= bond_alb_init_slave(bond
, new_slave
);
1401 goto err_unset_master
;
1405 /* If the mode USES_PRIMARY, then the new slave gets the
1406 * master's promisc (and mc) settings only if it becomes the
1407 * curr_active_slave, and that is taken care of later when calling
1408 * bond_change_active()
1410 if (!USES_PRIMARY(bond
->params
.mode
)) {
1411 /* set promiscuity level to new slave */
1412 if (bond_dev
->flags
& IFF_PROMISC
) {
1413 dev_set_promiscuity(slave_dev
, 1);
1416 /* set allmulti level to new slave */
1417 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1418 dev_set_allmulti(slave_dev
, 1);
1421 /* upload master's mc_list to new slave */
1422 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1423 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1427 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1428 /* add lacpdu mc addr to mc list */
1429 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1431 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1434 bond_add_vlans_on_slave(bond
, slave_dev
);
1436 write_lock_bh(&bond
->lock
);
1438 bond_attach_slave(bond
, new_slave
);
1440 new_slave
->delay
= 0;
1441 new_slave
->link_failure_count
= 0;
1443 bond_compute_features(bond
);
1445 new_slave
->last_arp_rx
= jiffies
;
1447 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1448 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1450 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1452 * miimon is set but a bonded network driver
1453 * does not support ETHTOOL/MII and
1454 * arp_interval is not set. Note: if
1455 * use_carrier is enabled, we will never go
1456 * here (because netif_carrier is always
1457 * supported); thus, we don't need to change
1458 * the messages for netif_carrier.
1460 printk(KERN_WARNING DRV_NAME
1461 ": %s: Warning: MII and ETHTOOL support not "
1462 "available for interface %s, and "
1463 "arp_interval/arp_ip_target module parameters "
1464 "not specified, thus bonding will not detect "
1465 "link failures! see bonding.txt for details.\n",
1466 bond_dev
->name
, slave_dev
->name
);
1467 } else if (link_reporting
== -1) {
1468 /* unable get link status using mii/ethtool */
1469 printk(KERN_WARNING DRV_NAME
1470 ": %s: Warning: can't get link status from "
1471 "interface %s; the network driver associated "
1472 "with this interface does not support MII or "
1473 "ETHTOOL link status reporting, thus miimon "
1474 "has no effect on this interface.\n",
1475 bond_dev
->name
, slave_dev
->name
);
1479 /* check for initial state */
1480 if (!bond
->params
.miimon
||
1481 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1482 if (bond
->params
.updelay
) {
1483 dprintk("Initial state of slave_dev is "
1484 "BOND_LINK_BACK\n");
1485 new_slave
->link
= BOND_LINK_BACK
;
1486 new_slave
->delay
= bond
->params
.updelay
;
1488 dprintk("Initial state of slave_dev is "
1490 new_slave
->link
= BOND_LINK_UP
;
1492 new_slave
->jiffies
= jiffies
;
1494 dprintk("Initial state of slave_dev is "
1495 "BOND_LINK_DOWN\n");
1496 new_slave
->link
= BOND_LINK_DOWN
;
1499 if (bond_update_speed_duplex(new_slave
) &&
1500 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1501 printk(KERN_WARNING DRV_NAME
1502 ": %s: Warning: failed to get speed and duplex from %s, "
1503 "assumed to be 100Mb/sec and Full.\n",
1504 bond_dev
->name
, new_slave
->dev
->name
);
1506 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1507 printk(KERN_WARNING DRV_NAME
1508 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1509 "support in base driver for proper aggregator "
1510 "selection.\n", bond_dev
->name
);
1514 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1515 /* if there is a primary slave, remember it */
1516 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1517 bond
->primary_slave
= new_slave
;
1521 switch (bond
->params
.mode
) {
1522 case BOND_MODE_ACTIVEBACKUP
:
1523 bond_set_slave_inactive_flags(new_slave
);
1524 bond_select_active_slave(bond
);
1526 case BOND_MODE_8023AD
:
1527 /* in 802.3ad mode, the internal mechanism
1528 * will activate the slaves in the selected
1531 bond_set_slave_inactive_flags(new_slave
);
1532 /* if this is the first slave */
1533 if (bond
->slave_cnt
== 1) {
1534 SLAVE_AD_INFO(new_slave
).id
= 1;
1535 /* Initialize AD with the number of times that the AD timer is called in 1 second
1536 * can be called only after the mac address of the bond is set
1538 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1539 bond
->params
.lacp_fast
);
1541 SLAVE_AD_INFO(new_slave
).id
=
1542 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1545 bond_3ad_bind_slave(new_slave
);
1549 new_slave
->state
= BOND_STATE_ACTIVE
;
1550 if ((!bond
->curr_active_slave
) &&
1551 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1552 /* first slave or no active slave yet, and this link
1553 * is OK, so make this interface the active one
1555 bond_change_active_slave(bond
, new_slave
);
1557 bond_set_slave_inactive_flags(new_slave
);
1561 dprintk("This slave is always active in trunk mode\n");
1563 /* always active in trunk mode */
1564 new_slave
->state
= BOND_STATE_ACTIVE
;
1566 /* In trunking mode there is little meaning to curr_active_slave
1567 * anyway (it holds no special properties of the bond device),
1568 * so we can change it without calling change_active_interface()
1570 if (!bond
->curr_active_slave
) {
1571 bond
->curr_active_slave
= new_slave
;
1574 } /* switch(bond_mode) */
1576 bond_set_carrier(bond
);
1578 write_unlock_bh(&bond
->lock
);
1580 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1582 goto err_unset_master
;
1584 printk(KERN_INFO DRV_NAME
1585 ": %s: enslaving %s as a%s interface with a%s link.\n",
1586 bond_dev
->name
, slave_dev
->name
,
1587 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1588 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1590 /* enslave is successful */
1593 /* Undo stages on error */
1595 netdev_set_master(slave_dev
, NULL
);
1598 dev_close(slave_dev
);
1601 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1602 addr
.sa_family
= slave_dev
->type
;
1603 dev_set_mac_address(slave_dev
, &addr
);
1609 bond_dev
->features
= old_features
;
1615 * Try to release the slave device <slave> from the bond device <master>
1616 * It is legal to access curr_active_slave without a lock because all the function
1619 * The rules for slave state should be:
1620 * for Active/Backup:
1621 * Active stays on all backups go down
1622 * for Bonded connections:
1623 * The first up interface should be left on and all others downed.
1625 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1627 struct bonding
*bond
= bond_dev
->priv
;
1628 struct slave
*slave
, *oldcurrent
;
1629 struct sockaddr addr
;
1630 int mac_addr_differ
;
1632 /* slave is not a slave or master is not master of this slave */
1633 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1634 (slave_dev
->master
!= bond_dev
)) {
1635 printk(KERN_ERR DRV_NAME
1636 ": %s: Error: cannot release %s.\n",
1637 bond_dev
->name
, slave_dev
->name
);
1641 write_lock_bh(&bond
->lock
);
1643 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1645 /* not a slave of this bond */
1646 printk(KERN_INFO DRV_NAME
1647 ": %s: %s not enslaved\n",
1648 bond_dev
->name
, slave_dev
->name
);
1649 write_unlock_bh(&bond
->lock
);
1653 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1656 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1657 printk(KERN_WARNING DRV_NAME
1658 ": %s: Warning: the permanent HWaddr of %s "
1659 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1660 "still in use by %s. Set the HWaddr of "
1661 "%s to a different address to avoid "
1665 slave
->perm_hwaddr
[0],
1666 slave
->perm_hwaddr
[1],
1667 slave
->perm_hwaddr
[2],
1668 slave
->perm_hwaddr
[3],
1669 slave
->perm_hwaddr
[4],
1670 slave
->perm_hwaddr
[5],
1675 /* Inform AD package of unbinding of slave. */
1676 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1677 /* must be called before the slave is
1678 * detached from the list
1680 bond_3ad_unbind_slave(slave
);
1683 printk(KERN_INFO DRV_NAME
1684 ": %s: releasing %s interface %s\n",
1686 (slave
->state
== BOND_STATE_ACTIVE
)
1687 ? "active" : "backup",
1690 oldcurrent
= bond
->curr_active_slave
;
1692 bond
->current_arp_slave
= NULL
;
1694 /* release the slave from its bond */
1695 bond_detach_slave(bond
, slave
);
1697 bond_compute_features(bond
);
1699 if (bond
->primary_slave
== slave
) {
1700 bond
->primary_slave
= NULL
;
1703 if (oldcurrent
== slave
) {
1704 bond_change_active_slave(bond
, NULL
);
1707 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1708 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1709 /* Must be called only after the slave has been
1710 * detached from the list and the curr_active_slave
1711 * has been cleared (if our_slave == old_current),
1712 * but before a new active slave is selected.
1714 bond_alb_deinit_slave(bond
, slave
);
1717 if (oldcurrent
== slave
)
1718 bond_select_active_slave(bond
);
1720 if (bond
->slave_cnt
== 0) {
1721 bond_set_carrier(bond
);
1723 /* if the last slave was removed, zero the mac address
1724 * of the master so it will be set by the application
1725 * to the mac address of the first slave
1727 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1729 if (list_empty(&bond
->vlan_list
)) {
1730 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1732 printk(KERN_WARNING DRV_NAME
1733 ": %s: Warning: clearing HW address of %s while it "
1734 "still has VLANs.\n",
1735 bond_dev
->name
, bond_dev
->name
);
1736 printk(KERN_WARNING DRV_NAME
1737 ": %s: When re-adding slaves, make sure the bond's "
1738 "HW address matches its VLANs'.\n",
1741 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1742 !bond_has_challenged_slaves(bond
)) {
1743 printk(KERN_INFO DRV_NAME
1744 ": %s: last VLAN challenged slave %s "
1745 "left bond %s. VLAN blocking is removed\n",
1746 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1747 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1750 write_unlock_bh(&bond
->lock
);
1752 /* must do this from outside any spinlocks */
1753 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1755 bond_del_vlans_from_slave(bond
, slave_dev
);
1757 /* If the mode USES_PRIMARY, then we should only remove its
1758 * promisc and mc settings if it was the curr_active_slave, but that was
1759 * already taken care of above when we detached the slave
1761 if (!USES_PRIMARY(bond
->params
.mode
)) {
1762 /* unset promiscuity level from slave */
1763 if (bond_dev
->flags
& IFF_PROMISC
) {
1764 dev_set_promiscuity(slave_dev
, -1);
1767 /* unset allmulti level from slave */
1768 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1769 dev_set_allmulti(slave_dev
, -1);
1772 /* flush master's mc_list from slave */
1773 bond_mc_list_flush(bond_dev
, slave_dev
);
1776 netdev_set_master(slave_dev
, NULL
);
1778 /* close slave before restoring its mac address */
1779 dev_close(slave_dev
);
1781 /* restore original ("permanent") mac address */
1782 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1783 addr
.sa_family
= slave_dev
->type
;
1784 dev_set_mac_address(slave_dev
, &addr
);
1786 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1787 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1792 return 0; /* deletion OK */
1796 * This function releases all slaves.
1798 static int bond_release_all(struct net_device
*bond_dev
)
1800 struct bonding
*bond
= bond_dev
->priv
;
1801 struct slave
*slave
;
1802 struct net_device
*slave_dev
;
1803 struct sockaddr addr
;
1805 write_lock_bh(&bond
->lock
);
1807 netif_carrier_off(bond_dev
);
1809 if (bond
->slave_cnt
== 0) {
1813 bond
->current_arp_slave
= NULL
;
1814 bond
->primary_slave
= NULL
;
1815 bond_change_active_slave(bond
, NULL
);
1817 while ((slave
= bond
->first_slave
) != NULL
) {
1818 /* Inform AD package of unbinding of slave
1819 * before slave is detached from the list.
1821 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1822 bond_3ad_unbind_slave(slave
);
1825 slave_dev
= slave
->dev
;
1826 bond_detach_slave(bond
, slave
);
1828 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1829 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1830 /* must be called only after the slave
1831 * has been detached from the list
1833 bond_alb_deinit_slave(bond
, slave
);
1836 bond_compute_features(bond
);
1838 /* now that the slave is detached, unlock and perform
1839 * all the undo steps that should not be called from
1842 write_unlock_bh(&bond
->lock
);
1844 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1845 bond_del_vlans_from_slave(bond
, slave_dev
);
1847 /* If the mode USES_PRIMARY, then we should only remove its
1848 * promisc and mc settings if it was the curr_active_slave, but that was
1849 * already taken care of above when we detached the slave
1851 if (!USES_PRIMARY(bond
->params
.mode
)) {
1852 /* unset promiscuity level from slave */
1853 if (bond_dev
->flags
& IFF_PROMISC
) {
1854 dev_set_promiscuity(slave_dev
, -1);
1857 /* unset allmulti level from slave */
1858 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1859 dev_set_allmulti(slave_dev
, -1);
1862 /* flush master's mc_list from slave */
1863 bond_mc_list_flush(bond_dev
, slave_dev
);
1866 netdev_set_master(slave_dev
, NULL
);
1868 /* close slave before restoring its mac address */
1869 dev_close(slave_dev
);
1871 /* restore original ("permanent") mac address*/
1872 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1873 addr
.sa_family
= slave_dev
->type
;
1874 dev_set_mac_address(slave_dev
, &addr
);
1876 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1877 IFF_SLAVE_INACTIVE
);
1881 /* re-acquire the lock before getting the next slave */
1882 write_lock_bh(&bond
->lock
);
1885 /* zero the mac address of the master so it will be
1886 * set by the application to the mac address of the
1889 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1891 if (list_empty(&bond
->vlan_list
)) {
1892 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1894 printk(KERN_WARNING DRV_NAME
1895 ": %s: Warning: clearing HW address of %s while it "
1896 "still has VLANs.\n",
1897 bond_dev
->name
, bond_dev
->name
);
1898 printk(KERN_WARNING DRV_NAME
1899 ": %s: When re-adding slaves, make sure the bond's "
1900 "HW address matches its VLANs'.\n",
1904 printk(KERN_INFO DRV_NAME
1905 ": %s: released all slaves\n",
1909 write_unlock_bh(&bond
->lock
);
1915 * This function changes the active slave to slave <slave_dev>.
1916 * It returns -EINVAL in the following cases.
1917 * - <slave_dev> is not found in the list.
1918 * - There is not active slave now.
1919 * - <slave_dev> is already active.
1920 * - The link state of <slave_dev> is not BOND_LINK_UP.
1921 * - <slave_dev> is not running.
1922 * In these cases, this fuction does nothing.
1923 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1925 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1927 struct bonding
*bond
= bond_dev
->priv
;
1928 struct slave
*old_active
= NULL
;
1929 struct slave
*new_active
= NULL
;
1932 if (!USES_PRIMARY(bond
->params
.mode
)) {
1936 /* Verify that master_dev is indeed the master of slave_dev */
1937 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1938 (slave_dev
->master
!= bond_dev
)) {
1942 write_lock_bh(&bond
->lock
);
1944 old_active
= bond
->curr_active_slave
;
1945 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1948 * Changing to the current active: do nothing; return success.
1950 if (new_active
&& (new_active
== old_active
)) {
1951 write_unlock_bh(&bond
->lock
);
1957 (new_active
->link
== BOND_LINK_UP
) &&
1958 IS_UP(new_active
->dev
)) {
1959 bond_change_active_slave(bond
, new_active
);
1964 write_unlock_bh(&bond
->lock
);
1969 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1971 struct bonding
*bond
= bond_dev
->priv
;
1973 info
->bond_mode
= bond
->params
.mode
;
1974 info
->miimon
= bond
->params
.miimon
;
1976 read_lock_bh(&bond
->lock
);
1977 info
->num_slaves
= bond
->slave_cnt
;
1978 read_unlock_bh(&bond
->lock
);
1983 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1985 struct bonding
*bond
= bond_dev
->priv
;
1986 struct slave
*slave
;
1989 if (info
->slave_id
< 0) {
1993 read_lock_bh(&bond
->lock
);
1995 bond_for_each_slave(bond
, slave
, i
) {
1996 if (i
== (int)info
->slave_id
) {
2002 read_unlock_bh(&bond
->lock
);
2005 strcpy(info
->slave_name
, slave
->dev
->name
);
2006 info
->link
= slave
->link
;
2007 info
->state
= slave
->state
;
2008 info
->link_failure_count
= slave
->link_failure_count
;
2016 /*-------------------------------- Monitoring -------------------------------*/
2018 /* this function is called regularly to monitor each slave's link. */
2019 void bond_mii_monitor(struct net_device
*bond_dev
)
2021 struct bonding
*bond
= bond_dev
->priv
;
2022 struct slave
*slave
, *oldcurrent
;
2023 int do_failover
= 0;
2027 read_lock(&bond
->lock
);
2029 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2031 if (bond
->kill_timers
) {
2035 if (bond
->slave_cnt
== 0) {
2039 /* we will try to read the link status of each of our slaves, and
2040 * set their IFF_RUNNING flag appropriately. For each slave not
2041 * supporting MII status, we won't do anything so that a user-space
2042 * program could monitor the link itself if needed.
2045 read_lock(&bond
->curr_slave_lock
);
2046 oldcurrent
= bond
->curr_active_slave
;
2047 read_unlock(&bond
->curr_slave_lock
);
2049 bond_for_each_slave(bond
, slave
, i
) {
2050 struct net_device
*slave_dev
= slave
->dev
;
2052 u16 old_speed
= slave
->speed
;
2053 u8 old_duplex
= slave
->duplex
;
2055 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2057 switch (slave
->link
) {
2058 case BOND_LINK_UP
: /* the link was up */
2059 if (link_state
== BMSR_LSTATUS
) {
2060 /* link stays up, nothing more to do */
2062 } else { /* link going down */
2063 slave
->link
= BOND_LINK_FAIL
;
2064 slave
->delay
= bond
->params
.downdelay
;
2066 if (slave
->link_failure_count
< UINT_MAX
) {
2067 slave
->link_failure_count
++;
2070 if (bond
->params
.downdelay
) {
2071 printk(KERN_INFO DRV_NAME
2072 ": %s: link status down for %s "
2073 "interface %s, disabling it in "
2077 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2078 ? ((slave
== oldcurrent
)
2079 ? "active " : "backup ")
2083 bond
->params
.downdelay
* bond
->params
.miimon
);
2086 /* no break ! fall through the BOND_LINK_FAIL test to
2087 ensure proper action to be taken
2089 case BOND_LINK_FAIL
: /* the link has just gone down */
2090 if (link_state
!= BMSR_LSTATUS
) {
2091 /* link stays down */
2092 if (slave
->delay
<= 0) {
2093 /* link down for too long time */
2094 slave
->link
= BOND_LINK_DOWN
;
2096 /* in active/backup mode, we must
2097 * completely disable this interface
2099 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2100 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2101 bond_set_slave_inactive_flags(slave
);
2104 printk(KERN_INFO DRV_NAME
2105 ": %s: link status definitely "
2106 "down for interface %s, "
2111 /* notify ad that the link status has changed */
2112 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2113 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2116 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2117 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2118 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2121 if (slave
== oldcurrent
) {
2129 slave
->link
= BOND_LINK_UP
;
2130 slave
->jiffies
= jiffies
;
2131 printk(KERN_INFO DRV_NAME
2132 ": %s: link status up again after %d "
2133 "ms for interface %s.\n",
2135 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2139 case BOND_LINK_DOWN
: /* the link was down */
2140 if (link_state
!= BMSR_LSTATUS
) {
2141 /* the link stays down, nothing more to do */
2143 } else { /* link going up */
2144 slave
->link
= BOND_LINK_BACK
;
2145 slave
->delay
= bond
->params
.updelay
;
2147 if (bond
->params
.updelay
) {
2148 /* if updelay == 0, no need to
2149 advertise about a 0 ms delay */
2150 printk(KERN_INFO DRV_NAME
2151 ": %s: link status up for "
2152 "interface %s, enabling it "
2156 bond
->params
.updelay
* bond
->params
.miimon
);
2159 /* no break ! fall through the BOND_LINK_BACK state in
2160 case there's something to do.
2162 case BOND_LINK_BACK
: /* the link has just come back */
2163 if (link_state
!= BMSR_LSTATUS
) {
2164 /* link down again */
2165 slave
->link
= BOND_LINK_DOWN
;
2167 printk(KERN_INFO DRV_NAME
2168 ": %s: link status down again after %d "
2169 "ms for interface %s.\n",
2171 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2175 if (slave
->delay
== 0) {
2176 /* now the link has been up for long time enough */
2177 slave
->link
= BOND_LINK_UP
;
2178 slave
->jiffies
= jiffies
;
2180 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2181 /* prevent it from being the active one */
2182 slave
->state
= BOND_STATE_BACKUP
;
2183 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2184 /* make it immediately active */
2185 slave
->state
= BOND_STATE_ACTIVE
;
2186 } else if (slave
!= bond
->primary_slave
) {
2187 /* prevent it from being the active one */
2188 slave
->state
= BOND_STATE_BACKUP
;
2191 printk(KERN_INFO DRV_NAME
2192 ": %s: link status definitely "
2193 "up for interface %s.\n",
2197 /* notify ad that the link status has changed */
2198 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2199 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2202 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2203 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2204 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2207 if ((!oldcurrent
) ||
2208 (slave
== bond
->primary_slave
)) {
2217 /* Should not happen */
2218 printk(KERN_ERR DRV_NAME
2219 ": %s: Error: %s Illegal value (link=%d)\n",
2224 } /* end of switch (slave->link) */
2226 bond_update_speed_duplex(slave
);
2228 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2229 if (old_speed
!= slave
->speed
) {
2230 bond_3ad_adapter_speed_changed(slave
);
2233 if (old_duplex
!= slave
->duplex
) {
2234 bond_3ad_adapter_duplex_changed(slave
);
2241 write_lock(&bond
->curr_slave_lock
);
2243 bond_select_active_slave(bond
);
2245 write_unlock(&bond
->curr_slave_lock
);
2247 bond_set_carrier(bond
);
2250 if (bond
->params
.miimon
) {
2251 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2254 read_unlock(&bond
->lock
);
2258 static u32
bond_glean_dev_ip(struct net_device
*dev
)
2260 struct in_device
*idev
;
2261 struct in_ifaddr
*ifa
;
2268 idev
= __in_dev_get_rcu(dev
);
2272 ifa
= idev
->ifa_list
;
2276 addr
= ifa
->ifa_local
;
2282 static int bond_has_ip(struct bonding
*bond
)
2284 struct vlan_entry
*vlan
, *vlan_next
;
2286 if (bond
->master_ip
)
2289 if (list_empty(&bond
->vlan_list
))
2292 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2301 static int bond_has_this_ip(struct bonding
*bond
, u32 ip
)
2303 struct vlan_entry
*vlan
, *vlan_next
;
2305 if (ip
== bond
->master_ip
)
2308 if (list_empty(&bond
->vlan_list
))
2311 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2313 if (ip
== vlan
->vlan_ip
)
2321 * We go to the (large) trouble of VLAN tagging ARP frames because
2322 * switches in VLAN mode (especially if ports are configured as
2323 * "native" to a VLAN) might not pass non-tagged frames.
2325 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, u32 dest_ip
, u32 src_ip
, unsigned short vlan_id
)
2327 struct sk_buff
*skb
;
2329 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2330 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2332 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2333 NULL
, slave_dev
->dev_addr
, NULL
);
2336 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2340 skb
= vlan_put_tag(skb
, vlan_id
);
2342 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2350 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2353 u32
*targets
= bond
->params
.arp_targets
;
2354 struct vlan_entry
*vlan
, *vlan_next
;
2355 struct net_device
*vlan_dev
;
2359 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2362 dprintk("basa: target %x\n", targets
[i
]);
2363 if (list_empty(&bond
->vlan_list
)) {
2364 dprintk("basa: empty vlan: arp_send\n");
2365 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2366 bond
->master_ip
, 0);
2371 * If VLANs are configured, we do a route lookup to
2372 * determine which VLAN interface would be used, so we
2373 * can tag the ARP with the proper VLAN tag.
2375 memset(&fl
, 0, sizeof(fl
));
2376 fl
.fl4_dst
= targets
[i
];
2377 fl
.fl4_tos
= RTO_ONLINK
;
2379 rv
= ip_route_output_key(&rt
, &fl
);
2381 if (net_ratelimit()) {
2382 printk(KERN_WARNING DRV_NAME
2383 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2384 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2390 * This target is not on a VLAN
2392 if (rt
->u
.dst
.dev
== bond
->dev
) {
2394 dprintk("basa: rtdev == bond->dev: arp_send\n");
2395 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2396 bond
->master_ip
, 0);
2401 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2403 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
2404 if (vlan_dev
== rt
->u
.dst
.dev
) {
2405 vlan_id
= vlan
->vlan_id
;
2406 dprintk("basa: vlan match on %s %d\n",
2407 vlan_dev
->name
, vlan_id
);
2414 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2415 vlan
->vlan_ip
, vlan_id
);
2419 if (net_ratelimit()) {
2420 printk(KERN_WARNING DRV_NAME
2421 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2422 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2423 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2430 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2431 * for each VLAN above us.
2433 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2435 struct slave
*slave
= bond
->curr_active_slave
;
2436 struct vlan_entry
*vlan
;
2437 struct net_device
*vlan_dev
;
2439 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2440 slave
? slave
->dev
->name
: "NULL");
2444 if (bond
->master_ip
) {
2445 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2446 bond
->master_ip
, 0);
2449 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2450 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
2451 if (vlan
->vlan_ip
) {
2452 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2453 vlan
->vlan_ip
, vlan
->vlan_id
);
2458 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, u32 sip
, u32 tip
)
2461 u32
*targets
= bond
->params
.arp_targets
;
2463 targets
= bond
->params
.arp_targets
;
2464 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2465 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2466 "%u.%u.%u.%u bhti(tip) %d\n",
2467 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2468 bond_has_this_ip(bond
, tip
));
2469 if (sip
== targets
[i
]) {
2470 if (bond_has_this_ip(bond
, tip
))
2471 slave
->last_arp_rx
= jiffies
;
2477 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2480 struct slave
*slave
;
2481 struct bonding
*bond
;
2482 unsigned char *arp_ptr
;
2485 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2489 read_lock(&bond
->lock
);
2491 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2492 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2493 orig_dev
? orig_dev
->name
: "NULL");
2495 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2496 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2499 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2500 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2501 (2 * dev
->addr_len
) +
2502 (2 * sizeof(u32
)))))
2506 if (arp
->ar_hln
!= dev
->addr_len
||
2507 skb
->pkt_type
== PACKET_OTHERHOST
||
2508 skb
->pkt_type
== PACKET_LOOPBACK
||
2509 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2510 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2514 arp_ptr
= (unsigned char *)(arp
+ 1);
2515 arp_ptr
+= dev
->addr_len
;
2516 memcpy(&sip
, arp_ptr
, 4);
2517 arp_ptr
+= 4 + dev
->addr_len
;
2518 memcpy(&tip
, arp_ptr
, 4);
2520 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2521 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2522 slave
->state
, bond
->params
.arp_validate
,
2523 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2526 * Backup slaves won't see the ARP reply, but do come through
2527 * here for each ARP probe (so we swap the sip/tip to validate
2528 * the probe). In a "redundant switch, common router" type of
2529 * configuration, the ARP probe will (hopefully) travel from
2530 * the active, through one switch, the router, then the other
2531 * switch before reaching the backup.
2533 if (slave
->state
== BOND_STATE_ACTIVE
)
2534 bond_validate_arp(bond
, slave
, sip
, tip
);
2536 bond_validate_arp(bond
, slave
, tip
, sip
);
2539 read_unlock(&bond
->lock
);
2542 return NET_RX_SUCCESS
;
2546 * this function is called regularly to monitor each slave's link
2547 * ensuring that traffic is being sent and received when arp monitoring
2548 * is used in load-balancing mode. if the adapter has been dormant, then an
2549 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2550 * arp monitoring in active backup mode.
2552 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2554 struct bonding
*bond
= bond_dev
->priv
;
2555 struct slave
*slave
, *oldcurrent
;
2556 int do_failover
= 0;
2560 read_lock(&bond
->lock
);
2562 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2564 if (bond
->kill_timers
) {
2568 if (bond
->slave_cnt
== 0) {
2572 read_lock(&bond
->curr_slave_lock
);
2573 oldcurrent
= bond
->curr_active_slave
;
2574 read_unlock(&bond
->curr_slave_lock
);
2576 /* see if any of the previous devices are up now (i.e. they have
2577 * xmt and rcv traffic). the curr_active_slave does not come into
2578 * the picture unless it is null. also, slave->jiffies is not needed
2579 * here because we send an arp on each slave and give a slave as
2580 * long as it needs to get the tx/rx within the delta.
2581 * TODO: what about up/down delay in arp mode? it wasn't here before
2584 bond_for_each_slave(bond
, slave
, i
) {
2585 if (slave
->link
!= BOND_LINK_UP
) {
2586 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2587 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2589 slave
->link
= BOND_LINK_UP
;
2590 slave
->state
= BOND_STATE_ACTIVE
;
2592 /* primary_slave has no meaning in round-robin
2593 * mode. the window of a slave being up and
2594 * curr_active_slave being null after enslaving
2598 printk(KERN_INFO DRV_NAME
2599 ": %s: link status definitely "
2600 "up for interface %s, ",
2605 printk(KERN_INFO DRV_NAME
2606 ": %s: interface %s is now up\n",
2612 /* slave->link == BOND_LINK_UP */
2614 /* not all switches will respond to an arp request
2615 * when the source ip is 0, so don't take the link down
2616 * if we don't know our ip yet
2618 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2619 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2620 bond_has_ip(bond
))) {
2622 slave
->link
= BOND_LINK_DOWN
;
2623 slave
->state
= BOND_STATE_BACKUP
;
2625 if (slave
->link_failure_count
< UINT_MAX
) {
2626 slave
->link_failure_count
++;
2629 printk(KERN_INFO DRV_NAME
2630 ": %s: interface %s is now down.\n",
2634 if (slave
== oldcurrent
) {
2640 /* note: if switch is in round-robin mode, all links
2641 * must tx arp to ensure all links rx an arp - otherwise
2642 * links may oscillate or not come up at all; if switch is
2643 * in something like xor mode, there is nothing we can
2644 * do - all replies will be rx'ed on same link causing slaves
2645 * to be unstable during low/no traffic periods
2647 if (IS_UP(slave
->dev
)) {
2648 bond_arp_send_all(bond
, slave
);
2653 write_lock(&bond
->curr_slave_lock
);
2655 bond_select_active_slave(bond
);
2657 write_unlock(&bond
->curr_slave_lock
);
2661 if (bond
->params
.arp_interval
) {
2662 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2665 read_unlock(&bond
->lock
);
2669 * When using arp monitoring in active-backup mode, this function is
2670 * called to determine if any backup slaves have went down or a new
2671 * current slave needs to be found.
2672 * The backup slaves never generate traffic, they are considered up by merely
2673 * receiving traffic. If the current slave goes down, each backup slave will
2674 * be given the opportunity to tx/rx an arp before being taken down - this
2675 * prevents all slaves from being taken down due to the current slave not
2676 * sending any traffic for the backups to receive. The arps are not necessarily
2677 * necessary, any tx and rx traffic will keep the current slave up. While any
2678 * rx traffic will keep the backup slaves up, the current slave is responsible
2679 * for generating traffic to keep them up regardless of any other traffic they
2680 * may have received.
2681 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2683 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2685 struct bonding
*bond
= bond_dev
->priv
;
2686 struct slave
*slave
;
2690 read_lock(&bond
->lock
);
2692 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2694 if (bond
->kill_timers
) {
2698 if (bond
->slave_cnt
== 0) {
2702 /* determine if any slave has come up or any backup slave has
2704 * TODO: what about up/down delay in arp mode? it wasn't here before
2707 bond_for_each_slave(bond
, slave
, i
) {
2708 if (slave
->link
!= BOND_LINK_UP
) {
2709 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2712 slave
->link
= BOND_LINK_UP
;
2714 write_lock(&bond
->curr_slave_lock
);
2716 if ((!bond
->curr_active_slave
) &&
2717 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2718 bond_change_active_slave(bond
, slave
);
2719 bond
->current_arp_slave
= NULL
;
2720 } else if (bond
->curr_active_slave
!= slave
) {
2721 /* this slave has just come up but we
2722 * already have a current slave; this
2723 * can also happen if bond_enslave adds
2724 * a new slave that is up while we are
2725 * searching for a new slave
2727 bond_set_slave_inactive_flags(slave
);
2728 bond
->current_arp_slave
= NULL
;
2731 bond_set_carrier(bond
);
2733 if (slave
== bond
->curr_active_slave
) {
2734 printk(KERN_INFO DRV_NAME
2735 ": %s: %s is up and now the "
2736 "active interface\n",
2739 netif_carrier_on(bond
->dev
);
2741 printk(KERN_INFO DRV_NAME
2742 ": %s: backup interface %s is "
2748 write_unlock(&bond
->curr_slave_lock
);
2751 read_lock(&bond
->curr_slave_lock
);
2753 if ((slave
!= bond
->curr_active_slave
) &&
2754 (!bond
->current_arp_slave
) &&
2755 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2756 bond_has_ip(bond
))) {
2757 /* a backup slave has gone down; three times
2758 * the delta allows the current slave to be
2759 * taken out before the backup slave.
2760 * note: a non-null current_arp_slave indicates
2761 * the curr_active_slave went down and we are
2762 * searching for a new one; under this
2763 * condition we only take the curr_active_slave
2764 * down - this gives each slave a chance to
2765 * tx/rx traffic before being taken out
2768 read_unlock(&bond
->curr_slave_lock
);
2770 slave
->link
= BOND_LINK_DOWN
;
2772 if (slave
->link_failure_count
< UINT_MAX
) {
2773 slave
->link_failure_count
++;
2776 bond_set_slave_inactive_flags(slave
);
2778 printk(KERN_INFO DRV_NAME
2779 ": %s: backup interface %s is now down\n",
2783 read_unlock(&bond
->curr_slave_lock
);
2788 read_lock(&bond
->curr_slave_lock
);
2789 slave
= bond
->curr_active_slave
;
2790 read_unlock(&bond
->curr_slave_lock
);
2793 /* if we have sent traffic in the past 2*arp_intervals but
2794 * haven't xmit and rx traffic in that time interval, select
2795 * a different slave. slave->jiffies is only updated when
2796 * a slave first becomes the curr_active_slave - not necessarily
2797 * after every arp; this ensures the slave has a full 2*delta
2798 * before being taken out. if a primary is being used, check
2799 * if it is up and needs to take over as the curr_active_slave
2801 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2802 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2803 bond_has_ip(bond
))) &&
2804 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2806 slave
->link
= BOND_LINK_DOWN
;
2808 if (slave
->link_failure_count
< UINT_MAX
) {
2809 slave
->link_failure_count
++;
2812 printk(KERN_INFO DRV_NAME
2813 ": %s: link status down for active interface "
2814 "%s, disabling it\n",
2818 write_lock(&bond
->curr_slave_lock
);
2820 bond_select_active_slave(bond
);
2821 slave
= bond
->curr_active_slave
;
2823 write_unlock(&bond
->curr_slave_lock
);
2825 bond
->current_arp_slave
= slave
;
2828 slave
->jiffies
= jiffies
;
2830 } else if ((bond
->primary_slave
) &&
2831 (bond
->primary_slave
!= slave
) &&
2832 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2833 /* at this point, slave is the curr_active_slave */
2834 printk(KERN_INFO DRV_NAME
2835 ": %s: changing from interface %s to primary "
2839 bond
->primary_slave
->dev
->name
);
2841 /* primary is up so switch to it */
2842 write_lock(&bond
->curr_slave_lock
);
2843 bond_change_active_slave(bond
, bond
->primary_slave
);
2844 write_unlock(&bond
->curr_slave_lock
);
2846 slave
= bond
->primary_slave
;
2847 slave
->jiffies
= jiffies
;
2849 bond
->current_arp_slave
= NULL
;
2852 /* the current slave must tx an arp to ensure backup slaves
2855 if (slave
&& bond_has_ip(bond
)) {
2856 bond_arp_send_all(bond
, slave
);
2860 /* if we don't have a curr_active_slave, search for the next available
2861 * backup slave from the current_arp_slave and make it the candidate
2862 * for becoming the curr_active_slave
2865 if (!bond
->current_arp_slave
) {
2866 bond
->current_arp_slave
= bond
->first_slave
;
2869 if (bond
->current_arp_slave
) {
2870 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2872 /* search for next candidate */
2873 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2874 if (IS_UP(slave
->dev
)) {
2875 slave
->link
= BOND_LINK_BACK
;
2876 bond_set_slave_active_flags(slave
);
2877 bond_arp_send_all(bond
, slave
);
2878 slave
->jiffies
= jiffies
;
2879 bond
->current_arp_slave
= slave
;
2883 /* if the link state is up at this point, we
2884 * mark it down - this can happen if we have
2885 * simultaneous link failures and
2886 * reselect_active_interface doesn't make this
2887 * one the current slave so it is still marked
2888 * up when it is actually down
2890 if (slave
->link
== BOND_LINK_UP
) {
2891 slave
->link
= BOND_LINK_DOWN
;
2892 if (slave
->link_failure_count
< UINT_MAX
) {
2893 slave
->link_failure_count
++;
2896 bond_set_slave_inactive_flags(slave
);
2898 printk(KERN_INFO DRV_NAME
2899 ": %s: backup interface %s is "
2909 if (bond
->params
.arp_interval
) {
2910 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2913 read_unlock(&bond
->lock
);
2916 /*------------------------------ proc/seq_file-------------------------------*/
2918 #ifdef CONFIG_PROC_FS
2920 #define SEQ_START_TOKEN ((void *)1)
2922 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2924 struct bonding
*bond
= seq
->private;
2926 struct slave
*slave
;
2929 /* make sure the bond won't be taken away */
2930 read_lock(&dev_base_lock
);
2931 read_lock_bh(&bond
->lock
);
2934 return SEQ_START_TOKEN
;
2937 bond_for_each_slave(bond
, slave
, i
) {
2938 if (++off
== *pos
) {
2946 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2948 struct bonding
*bond
= seq
->private;
2949 struct slave
*slave
= v
;
2952 if (v
== SEQ_START_TOKEN
) {
2953 return bond
->first_slave
;
2956 slave
= slave
->next
;
2958 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2961 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2963 struct bonding
*bond
= seq
->private;
2965 read_unlock_bh(&bond
->lock
);
2966 read_unlock(&dev_base_lock
);
2969 static void bond_info_show_master(struct seq_file
*seq
)
2971 struct bonding
*bond
= seq
->private;
2976 read_lock(&bond
->curr_slave_lock
);
2977 curr
= bond
->curr_active_slave
;
2978 read_unlock(&bond
->curr_slave_lock
);
2980 seq_printf(seq
, "Bonding Mode: %s\n",
2981 bond_mode_name(bond
->params
.mode
));
2983 if (bond
->params
.mode
== BOND_MODE_XOR
||
2984 bond
->params
.mode
== BOND_MODE_8023AD
) {
2985 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2986 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2987 bond
->params
.xmit_policy
);
2990 if (USES_PRIMARY(bond
->params
.mode
)) {
2991 seq_printf(seq
, "Primary Slave: %s\n",
2992 (bond
->primary_slave
) ?
2993 bond
->primary_slave
->dev
->name
: "None");
2995 seq_printf(seq
, "Currently Active Slave: %s\n",
2996 (curr
) ? curr
->dev
->name
: "None");
2999 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
3001 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
3002 seq_printf(seq
, "Up Delay (ms): %d\n",
3003 bond
->params
.updelay
* bond
->params
.miimon
);
3004 seq_printf(seq
, "Down Delay (ms): %d\n",
3005 bond
->params
.downdelay
* bond
->params
.miimon
);
3008 /* ARP information */
3009 if(bond
->params
.arp_interval
> 0) {
3011 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3012 bond
->params
.arp_interval
);
3014 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3016 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3017 if (!bond
->params
.arp_targets
[i
])
3020 seq_printf(seq
, ",");
3021 target
= ntohl(bond
->params
.arp_targets
[i
]);
3022 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3025 seq_printf(seq
, "\n");
3028 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3029 struct ad_info ad_info
;
3031 seq_puts(seq
, "\n802.3ad info\n");
3032 seq_printf(seq
, "LACP rate: %s\n",
3033 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3035 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3036 seq_printf(seq
, "bond %s has no active aggregator\n",
3039 seq_printf(seq
, "Active Aggregator Info:\n");
3041 seq_printf(seq
, "\tAggregator ID: %d\n",
3042 ad_info
.aggregator_id
);
3043 seq_printf(seq
, "\tNumber of ports: %d\n",
3045 seq_printf(seq
, "\tActor Key: %d\n",
3047 seq_printf(seq
, "\tPartner Key: %d\n",
3048 ad_info
.partner_key
);
3049 seq_printf(seq
, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
3050 ad_info
.partner_system
[0],
3051 ad_info
.partner_system
[1],
3052 ad_info
.partner_system
[2],
3053 ad_info
.partner_system
[3],
3054 ad_info
.partner_system
[4],
3055 ad_info
.partner_system
[5]);
3060 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3062 struct bonding
*bond
= seq
->private;
3064 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3065 seq_printf(seq
, "MII Status: %s\n",
3066 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3067 seq_printf(seq
, "Link Failure Count: %u\n",
3068 slave
->link_failure_count
);
3071 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
3072 slave
->perm_hwaddr
[0], slave
->perm_hwaddr
[1],
3073 slave
->perm_hwaddr
[2], slave
->perm_hwaddr
[3],
3074 slave
->perm_hwaddr
[4], slave
->perm_hwaddr
[5]);
3076 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3077 const struct aggregator
*agg
3078 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3081 seq_printf(seq
, "Aggregator ID: %d\n",
3082 agg
->aggregator_identifier
);
3084 seq_puts(seq
, "Aggregator ID: N/A\n");
3089 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3091 if (v
== SEQ_START_TOKEN
) {
3092 seq_printf(seq
, "%s\n", version
);
3093 bond_info_show_master(seq
);
3095 bond_info_show_slave(seq
, v
);
3101 static struct seq_operations bond_info_seq_ops
= {
3102 .start
= bond_info_seq_start
,
3103 .next
= bond_info_seq_next
,
3104 .stop
= bond_info_seq_stop
,
3105 .show
= bond_info_seq_show
,
3108 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3110 struct seq_file
*seq
;
3111 struct proc_dir_entry
*proc
;
3114 res
= seq_open(file
, &bond_info_seq_ops
);
3116 /* recover the pointer buried in proc_dir_entry data */
3117 seq
= file
->private_data
;
3119 seq
->private = proc
->data
;
3125 static struct file_operations bond_info_fops
= {
3126 .owner
= THIS_MODULE
,
3127 .open
= bond_info_open
,
3129 .llseek
= seq_lseek
,
3130 .release
= seq_release
,
3133 static int bond_create_proc_entry(struct bonding
*bond
)
3135 struct net_device
*bond_dev
= bond
->dev
;
3137 if (bond_proc_dir
) {
3138 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3141 if (bond
->proc_entry
== NULL
) {
3142 printk(KERN_WARNING DRV_NAME
3143 ": Warning: Cannot create /proc/net/%s/%s\n",
3144 DRV_NAME
, bond_dev
->name
);
3146 bond
->proc_entry
->data
= bond
;
3147 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3148 bond
->proc_entry
->owner
= THIS_MODULE
;
3149 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3156 static void bond_remove_proc_entry(struct bonding
*bond
)
3158 if (bond_proc_dir
&& bond
->proc_entry
) {
3159 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3160 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3161 bond
->proc_entry
= NULL
;
3165 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3166 * Caller must hold rtnl_lock.
3168 static void bond_create_proc_dir(void)
3170 int len
= strlen(DRV_NAME
);
3172 for (bond_proc_dir
= proc_net
->subdir
; bond_proc_dir
;
3173 bond_proc_dir
= bond_proc_dir
->next
) {
3174 if ((bond_proc_dir
->namelen
== len
) &&
3175 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3180 if (!bond_proc_dir
) {
3181 bond_proc_dir
= proc_mkdir(DRV_NAME
, proc_net
);
3182 if (bond_proc_dir
) {
3183 bond_proc_dir
->owner
= THIS_MODULE
;
3185 printk(KERN_WARNING DRV_NAME
3186 ": Warning: cannot create /proc/net/%s\n",
3192 /* Destroy the bonding directory under /proc/net, if empty.
3193 * Caller must hold rtnl_lock.
3195 static void bond_destroy_proc_dir(void)
3197 struct proc_dir_entry
*de
;
3199 if (!bond_proc_dir
) {
3203 /* verify that the /proc dir is empty */
3204 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3205 /* ignore . and .. */
3206 if (*(de
->name
) != '.') {
3212 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3213 bond_proc_dir
->owner
= NULL
;
3216 remove_proc_entry(DRV_NAME
, proc_net
);
3217 bond_proc_dir
= NULL
;
3220 #endif /* CONFIG_PROC_FS */
3222 /*-------------------------- netdev event handling --------------------------*/
3225 * Change device name
3227 static int bond_event_changename(struct bonding
*bond
)
3229 #ifdef CONFIG_PROC_FS
3230 bond_remove_proc_entry(bond
);
3231 bond_create_proc_entry(bond
);
3233 down_write(&(bonding_rwsem
));
3234 bond_destroy_sysfs_entry(bond
);
3235 bond_create_sysfs_entry(bond
);
3236 up_write(&(bonding_rwsem
));
3240 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3242 struct bonding
*event_bond
= bond_dev
->priv
;
3245 case NETDEV_CHANGENAME
:
3246 return bond_event_changename(event_bond
);
3247 case NETDEV_UNREGISTER
:
3249 * TODO: remove a bond from the list?
3259 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3261 struct net_device
*bond_dev
= slave_dev
->master
;
3262 struct bonding
*bond
= bond_dev
->priv
;
3265 case NETDEV_UNREGISTER
:
3267 bond_release(bond_dev
, slave_dev
);
3272 * TODO: is this what we get if somebody
3273 * sets up a hierarchical bond, then rmmod's
3274 * one of the slave bonding devices?
3279 * ... Or is it this?
3282 case NETDEV_CHANGEMTU
:
3284 * TODO: Should slaves be allowed to
3285 * independently alter their MTU? For
3286 * an active-backup bond, slaves need
3287 * not be the same type of device, so
3288 * MTUs may vary. For other modes,
3289 * slaves arguably should have the
3290 * same MTUs. To do this, we'd need to
3291 * take over the slave's change_mtu
3292 * function for the duration of their
3296 case NETDEV_CHANGENAME
:
3298 * TODO: handle changing the primary's name
3301 case NETDEV_FEAT_CHANGE
:
3302 bond_compute_features(bond
);
3312 * bond_netdev_event: handle netdev notifier chain events.
3314 * This function receives events for the netdev chain. The caller (an
3315 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3316 * locks for us to safely manipulate the slave devices (RTNL lock,
3319 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3321 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3323 dprintk("event_dev: %s, event: %lx\n",
3324 (event_dev
? event_dev
->name
: "None"),
3327 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3330 if (event_dev
->flags
& IFF_MASTER
) {
3331 dprintk("IFF_MASTER\n");
3332 return bond_master_netdev_event(event
, event_dev
);
3335 if (event_dev
->flags
& IFF_SLAVE
) {
3336 dprintk("IFF_SLAVE\n");
3337 return bond_slave_netdev_event(event
, event_dev
);
3344 * bond_inetaddr_event: handle inetaddr notifier chain events.
3346 * We keep track of device IPs primarily to use as source addresses in
3347 * ARP monitor probes (rather than spewing out broadcasts all the time).
3349 * We track one IP for the main device (if it has one), plus one per VLAN.
3351 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3353 struct in_ifaddr
*ifa
= ptr
;
3354 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3355 struct bonding
*bond
, *bond_next
;
3356 struct vlan_entry
*vlan
, *vlan_next
;
3358 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3359 if (bond
->dev
== event_dev
) {
3362 bond
->master_ip
= ifa
->ifa_local
;
3365 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3372 if (list_empty(&bond
->vlan_list
))
3375 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3377 vlan_dev
= bond
->vlgrp
->vlan_devices
[vlan
->vlan_id
];
3378 if (vlan_dev
== event_dev
) {
3381 vlan
->vlan_ip
= ifa
->ifa_local
;
3385 bond_glean_dev_ip(vlan_dev
);
3396 static struct notifier_block bond_netdev_notifier
= {
3397 .notifier_call
= bond_netdev_event
,
3400 static struct notifier_block bond_inetaddr_notifier
= {
3401 .notifier_call
= bond_inetaddr_event
,
3404 /*-------------------------- Packet type handling ---------------------------*/
3406 /* register to receive lacpdus on a bond */
3407 static void bond_register_lacpdu(struct bonding
*bond
)
3409 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3411 /* initialize packet type */
3412 pk_type
->type
= PKT_TYPE_LACPDU
;
3413 pk_type
->dev
= bond
->dev
;
3414 pk_type
->func
= bond_3ad_lacpdu_recv
;
3416 dev_add_pack(pk_type
);
3419 /* unregister to receive lacpdus on a bond */
3420 static void bond_unregister_lacpdu(struct bonding
*bond
)
3422 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3425 void bond_register_arp(struct bonding
*bond
)
3427 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3429 pt
->type
= htons(ETH_P_ARP
);
3430 pt
->dev
= NULL
; /*bond->dev;XXX*/
3431 pt
->func
= bond_arp_rcv
;
3435 void bond_unregister_arp(struct bonding
*bond
)
3437 dev_remove_pack(&bond
->arp_mon_pt
);
3440 /*---------------------------- Hashing Policies -----------------------------*/
3443 * Hash for the the output device based upon layer 3 and layer 4 data. If
3444 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3445 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3447 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3448 struct net_device
*bond_dev
, int count
)
3450 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3451 struct iphdr
*iph
= skb
->nh
.iph
;
3452 u16
*layer4hdr
= (u16
*)((u32
*)iph
+ iph
->ihl
);
3455 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3456 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3457 (iph
->protocol
== IPPROTO_TCP
||
3458 iph
->protocol
== IPPROTO_UDP
)) {
3459 layer4_xor
= htons((*layer4hdr
^ *(layer4hdr
+ 1)));
3461 return (layer4_xor
^
3462 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3466 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3470 * Hash for the output device based upon layer 2 data
3472 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3473 struct net_device
*bond_dev
, int count
)
3475 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3477 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3480 /*-------------------------- Device entry points ----------------------------*/
3482 static int bond_open(struct net_device
*bond_dev
)
3484 struct bonding
*bond
= bond_dev
->priv
;
3485 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3486 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3488 bond
->kill_timers
= 0;
3490 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3491 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3492 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3494 /* bond_alb_initialize must be called before the timer
3497 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3498 /* something went wrong - fail the open operation */
3502 init_timer(alb_timer
);
3503 alb_timer
->expires
= jiffies
+ 1;
3504 alb_timer
->data
= (unsigned long)bond
;
3505 alb_timer
->function
= (void *)&bond_alb_monitor
;
3506 add_timer(alb_timer
);
3509 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3510 init_timer(mii_timer
);
3511 mii_timer
->expires
= jiffies
+ 1;
3512 mii_timer
->data
= (unsigned long)bond_dev
;
3513 mii_timer
->function
= (void *)&bond_mii_monitor
;
3514 add_timer(mii_timer
);
3517 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3518 init_timer(arp_timer
);
3519 arp_timer
->expires
= jiffies
+ 1;
3520 arp_timer
->data
= (unsigned long)bond_dev
;
3521 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3522 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3524 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3526 if (bond
->params
.arp_validate
)
3527 bond_register_arp(bond
);
3529 add_timer(arp_timer
);
3532 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3533 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3534 init_timer(ad_timer
);
3535 ad_timer
->expires
= jiffies
+ 1;
3536 ad_timer
->data
= (unsigned long)bond
;
3537 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3538 add_timer(ad_timer
);
3540 /* register to receive LACPDUs */
3541 bond_register_lacpdu(bond
);
3547 static int bond_close(struct net_device
*bond_dev
)
3549 struct bonding
*bond
= bond_dev
->priv
;
3551 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3552 /* Unregister the receive of LACPDUs */
3553 bond_unregister_lacpdu(bond
);
3556 if (bond
->params
.arp_validate
)
3557 bond_unregister_arp(bond
);
3559 write_lock_bh(&bond
->lock
);
3562 /* signal timers not to re-arm */
3563 bond
->kill_timers
= 1;
3565 write_unlock_bh(&bond
->lock
);
3567 /* del_timer_sync must run without holding the bond->lock
3568 * because a running timer might be trying to hold it too
3571 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3572 del_timer_sync(&bond
->mii_timer
);
3575 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3576 del_timer_sync(&bond
->arp_timer
);
3579 switch (bond
->params
.mode
) {
3580 case BOND_MODE_8023AD
:
3581 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3585 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3592 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3593 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3594 /* Must be called only after all
3595 * slaves have been released
3597 bond_alb_deinitialize(bond
);
3603 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3605 struct bonding
*bond
= bond_dev
->priv
;
3606 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3607 struct slave
*slave
;
3610 memset(stats
, 0, sizeof(struct net_device_stats
));
3612 read_lock_bh(&bond
->lock
);
3614 bond_for_each_slave(bond
, slave
, i
) {
3615 if (slave
->dev
->get_stats
) {
3616 sstats
= slave
->dev
->get_stats(slave
->dev
);
3618 stats
->rx_packets
+= sstats
->rx_packets
;
3619 stats
->rx_bytes
+= sstats
->rx_bytes
;
3620 stats
->rx_errors
+= sstats
->rx_errors
;
3621 stats
->rx_dropped
+= sstats
->rx_dropped
;
3623 stats
->tx_packets
+= sstats
->tx_packets
;
3624 stats
->tx_bytes
+= sstats
->tx_bytes
;
3625 stats
->tx_errors
+= sstats
->tx_errors
;
3626 stats
->tx_dropped
+= sstats
->tx_dropped
;
3628 stats
->multicast
+= sstats
->multicast
;
3629 stats
->collisions
+= sstats
->collisions
;
3631 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3632 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3633 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3634 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3635 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3636 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3638 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3639 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3640 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3641 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3642 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3646 read_unlock_bh(&bond
->lock
);
3651 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3653 struct net_device
*slave_dev
= NULL
;
3654 struct ifbond k_binfo
;
3655 struct ifbond __user
*u_binfo
= NULL
;
3656 struct ifslave k_sinfo
;
3657 struct ifslave __user
*u_sinfo
= NULL
;
3658 struct mii_ioctl_data
*mii
= NULL
;
3661 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3662 bond_dev
->name
, cmd
);
3674 * We do this again just in case we were called by SIOCGMIIREG
3675 * instead of SIOCGMIIPHY.
3682 if (mii
->reg_num
== 1) {
3683 struct bonding
*bond
= bond_dev
->priv
;
3685 read_lock_bh(&bond
->lock
);
3686 read_lock(&bond
->curr_slave_lock
);
3687 if (netif_carrier_ok(bond
->dev
)) {
3688 mii
->val_out
= BMSR_LSTATUS
;
3690 read_unlock(&bond
->curr_slave_lock
);
3691 read_unlock_bh(&bond
->lock
);
3695 case BOND_INFO_QUERY_OLD
:
3696 case SIOCBONDINFOQUERY
:
3697 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3699 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3703 res
= bond_info_query(bond_dev
, &k_binfo
);
3705 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3711 case BOND_SLAVE_INFO_QUERY_OLD
:
3712 case SIOCBONDSLAVEINFOQUERY
:
3713 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3715 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3719 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3721 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3732 if (!capable(CAP_NET_ADMIN
)) {
3736 down_write(&(bonding_rwsem
));
3737 slave_dev
= dev_get_by_name(ifr
->ifr_slave
);
3739 dprintk("slave_dev=%p: \n", slave_dev
);
3744 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3746 case BOND_ENSLAVE_OLD
:
3747 case SIOCBONDENSLAVE
:
3748 res
= bond_enslave(bond_dev
, slave_dev
);
3750 case BOND_RELEASE_OLD
:
3751 case SIOCBONDRELEASE
:
3752 res
= bond_release(bond_dev
, slave_dev
);
3754 case BOND_SETHWADDR_OLD
:
3755 case SIOCBONDSETHWADDR
:
3756 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3758 case BOND_CHANGE_ACTIVE_OLD
:
3759 case SIOCBONDCHANGEACTIVE
:
3760 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3769 up_write(&(bonding_rwsem
));
3773 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3775 struct bonding
*bond
= bond_dev
->priv
;
3776 struct dev_mc_list
*dmi
;
3778 write_lock_bh(&bond
->lock
);
3781 * Do promisc before checking multicast_mode
3783 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3784 bond_set_promiscuity(bond
, 1);
3787 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3788 bond_set_promiscuity(bond
, -1);
3791 /* set allmulti flag to slaves */
3792 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3793 bond_set_allmulti(bond
, 1);
3796 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3797 bond_set_allmulti(bond
, -1);
3800 bond
->flags
= bond_dev
->flags
;
3802 /* looking for addresses to add to slaves' mc list */
3803 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3804 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3805 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3809 /* looking for addresses to delete from slaves' list */
3810 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3811 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3812 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3816 /* save master's multicast list */
3817 bond_mc_list_destroy(bond
);
3818 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3820 write_unlock_bh(&bond
->lock
);
3824 * Change the MTU of all of a master's slaves to match the master
3826 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3828 struct bonding
*bond
= bond_dev
->priv
;
3829 struct slave
*slave
, *stop_at
;
3833 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3834 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3836 /* Can't hold bond->lock with bh disabled here since
3837 * some base drivers panic. On the other hand we can't
3838 * hold bond->lock without bh disabled because we'll
3839 * deadlock. The only solution is to rely on the fact
3840 * that we're under rtnl_lock here, and the slaves
3841 * list won't change. This doesn't solve the problem
3842 * of setting the slave's MTU while it is
3843 * transmitting, but the assumption is that the base
3844 * driver can handle that.
3846 * TODO: figure out a way to safely iterate the slaves
3847 * list, but without holding a lock around the actual
3848 * call to the base driver.
3851 bond_for_each_slave(bond
, slave
, i
) {
3852 dprintk("s %p s->p %p c_m %p\n", slave
,
3853 slave
->prev
, slave
->dev
->change_mtu
);
3855 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3858 /* If we failed to set the slave's mtu to the new value
3859 * we must abort the operation even in ACTIVE_BACKUP
3860 * mode, because if we allow the backup slaves to have
3861 * different mtu values than the active slave we'll
3862 * need to change their mtu when doing a failover. That
3863 * means changing their mtu from timer context, which
3864 * is probably not a good idea.
3866 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3871 bond_dev
->mtu
= new_mtu
;
3876 /* unwind from head to the slave that failed */
3878 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3881 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3883 dprintk("unwind err %d dev %s\n", tmp_res
,
3894 * Note that many devices must be down to change the HW address, and
3895 * downing the master releases all slaves. We can make bonds full of
3896 * bonding devices to test this, however.
3898 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3900 struct bonding
*bond
= bond_dev
->priv
;
3901 struct sockaddr
*sa
= addr
, tmp_sa
;
3902 struct slave
*slave
, *stop_at
;
3906 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3908 if (!is_valid_ether_addr(sa
->sa_data
)) {
3909 return -EADDRNOTAVAIL
;
3912 /* Can't hold bond->lock with bh disabled here since
3913 * some base drivers panic. On the other hand we can't
3914 * hold bond->lock without bh disabled because we'll
3915 * deadlock. The only solution is to rely on the fact
3916 * that we're under rtnl_lock here, and the slaves
3917 * list won't change. This doesn't solve the problem
3918 * of setting the slave's hw address while it is
3919 * transmitting, but the assumption is that the base
3920 * driver can handle that.
3922 * TODO: figure out a way to safely iterate the slaves
3923 * list, but without holding a lock around the actual
3924 * call to the base driver.
3927 bond_for_each_slave(bond
, slave
, i
) {
3928 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3930 if (slave
->dev
->set_mac_address
== NULL
) {
3932 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3936 res
= dev_set_mac_address(slave
->dev
, addr
);
3938 /* TODO: consider downing the slave
3940 * User should expect communications
3941 * breakage anyway until ARP finish
3944 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3950 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3954 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3955 tmp_sa
.sa_family
= bond_dev
->type
;
3957 /* unwind from head to the slave that failed */
3959 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3962 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3964 dprintk("unwind err %d dev %s\n", tmp_res
,
3972 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3974 struct bonding
*bond
= bond_dev
->priv
;
3975 struct slave
*slave
, *start_at
;
3979 read_lock(&bond
->lock
);
3981 if (!BOND_IS_OK(bond
)) {
3985 read_lock(&bond
->curr_slave_lock
);
3986 slave
= start_at
= bond
->curr_active_slave
;
3987 read_unlock(&bond
->curr_slave_lock
);
3993 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3994 if (IS_UP(slave
->dev
) &&
3995 (slave
->link
== BOND_LINK_UP
) &&
3996 (slave
->state
== BOND_STATE_ACTIVE
)) {
3997 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
3999 write_lock(&bond
->curr_slave_lock
);
4000 bond
->curr_active_slave
= slave
->next
;
4001 write_unlock(&bond
->curr_slave_lock
);
4010 /* no suitable interface, frame not sent */
4013 read_unlock(&bond
->lock
);
4017 static void bond_activebackup_xmit_copy(struct sk_buff
*skb
,
4018 struct bonding
*bond
,
4019 struct slave
*slave
)
4021 struct sk_buff
*skb2
= skb_copy(skb
, GFP_ATOMIC
);
4022 struct ethhdr
*eth_data
;
4027 printk(KERN_ERR DRV_NAME
": Error: "
4028 "bond_activebackup_xmit_copy(): skb_copy() failed\n");
4032 skb2
->mac
.raw
= (unsigned char *)skb2
->data
;
4033 eth_data
= eth_hdr(skb2
);
4035 /* Pick an appropriate source MAC address
4036 * -- use slave's perm MAC addr, unless used by bond
4037 * -- otherwise, borrow active slave's perm MAC addr
4038 * since that will not be used
4040 hwaddr
= slave
->perm_hwaddr
;
4041 if (!memcmp(eth_data
->h_source
, hwaddr
, ETH_ALEN
))
4042 hwaddr
= bond
->curr_active_slave
->perm_hwaddr
;
4044 /* Set source MAC address appropriately */
4045 memcpy(eth_data
->h_source
, hwaddr
, ETH_ALEN
);
4047 res
= bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
4049 dev_kfree_skb(skb2
);
4055 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4056 * the bond has a usable interface.
4058 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4060 struct bonding
*bond
= bond_dev
->priv
;
4063 read_lock(&bond
->lock
);
4064 read_lock(&bond
->curr_slave_lock
);
4066 if (!BOND_IS_OK(bond
)) {
4070 if (!bond
->curr_active_slave
)
4073 /* Xmit IGMP frames on all slaves to ensure rapid fail-over
4074 for multicast traffic on snooping switches */
4075 if (skb
->protocol
== __constant_htons(ETH_P_IP
) &&
4076 skb
->nh
.iph
->protocol
== IPPROTO_IGMP
) {
4077 struct slave
*slave
, *active_slave
;
4080 active_slave
= bond
->curr_active_slave
;
4081 bond_for_each_slave_from_to(bond
, slave
, i
, active_slave
->next
,
4083 if (IS_UP(slave
->dev
) &&
4084 (slave
->link
== BOND_LINK_UP
))
4085 bond_activebackup_xmit_copy(skb
, bond
, slave
);
4088 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4092 /* no suitable interface, frame not sent */
4095 read_unlock(&bond
->curr_slave_lock
);
4096 read_unlock(&bond
->lock
);
4101 * In bond_xmit_xor() , we determine the output device by using a pre-
4102 * determined xmit_hash_policy(), If the selected device is not enabled,
4103 * find the next active slave.
4105 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4107 struct bonding
*bond
= bond_dev
->priv
;
4108 struct slave
*slave
, *start_at
;
4113 read_lock(&bond
->lock
);
4115 if (!BOND_IS_OK(bond
)) {
4119 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4121 bond_for_each_slave(bond
, slave
, i
) {
4130 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4131 if (IS_UP(slave
->dev
) &&
4132 (slave
->link
== BOND_LINK_UP
) &&
4133 (slave
->state
== BOND_STATE_ACTIVE
)) {
4134 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4141 /* no suitable interface, frame not sent */
4144 read_unlock(&bond
->lock
);
4149 * in broadcast mode, we send everything to all usable interfaces.
4151 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4153 struct bonding
*bond
= bond_dev
->priv
;
4154 struct slave
*slave
, *start_at
;
4155 struct net_device
*tx_dev
= NULL
;
4159 read_lock(&bond
->lock
);
4161 if (!BOND_IS_OK(bond
)) {
4165 read_lock(&bond
->curr_slave_lock
);
4166 start_at
= bond
->curr_active_slave
;
4167 read_unlock(&bond
->curr_slave_lock
);
4173 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4174 if (IS_UP(slave
->dev
) &&
4175 (slave
->link
== BOND_LINK_UP
) &&
4176 (slave
->state
== BOND_STATE_ACTIVE
)) {
4178 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4180 printk(KERN_ERR DRV_NAME
4181 ": %s: Error: bond_xmit_broadcast(): "
4182 "skb_clone() failed\n",
4187 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4189 dev_kfree_skb(skb2
);
4193 tx_dev
= slave
->dev
;
4198 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4203 /* no suitable interface, frame not sent */
4206 /* frame sent to all suitable interfaces */
4207 read_unlock(&bond
->lock
);
4211 /*------------------------- Device initialization ---------------------------*/
4214 * set bond mode specific net device operations
4216 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4218 struct net_device
*bond_dev
= bond
->dev
;
4221 case BOND_MODE_ROUNDROBIN
:
4222 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4224 case BOND_MODE_ACTIVEBACKUP
:
4225 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4228 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4229 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4230 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4232 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4234 case BOND_MODE_BROADCAST
:
4235 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4237 case BOND_MODE_8023AD
:
4238 bond_set_master_3ad_flags(bond
);
4239 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4240 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4241 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4243 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4246 bond_set_master_alb_flags(bond
);
4249 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4250 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4253 /* Should never happen, mode already checked */
4254 printk(KERN_ERR DRV_NAME
4255 ": %s: Error: Unknown bonding mode %d\n",
4262 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4263 struct ethtool_drvinfo
*drvinfo
)
4265 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4266 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4267 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4270 static const struct ethtool_ops bond_ethtool_ops
= {
4271 .get_tx_csum
= ethtool_op_get_tx_csum
,
4272 .get_tso
= ethtool_op_get_tso
,
4273 .get_ufo
= ethtool_op_get_ufo
,
4274 .get_sg
= ethtool_op_get_sg
,
4275 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4279 * Does not allocate but creates a /proc entry.
4282 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4284 struct bonding
*bond
= bond_dev
->priv
;
4286 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4288 /* initialize rwlocks */
4289 rwlock_init(&bond
->lock
);
4290 rwlock_init(&bond
->curr_slave_lock
);
4292 bond
->params
= *params
; /* copy params struct */
4294 /* Initialize pointers */
4295 bond
->first_slave
= NULL
;
4296 bond
->curr_active_slave
= NULL
;
4297 bond
->current_arp_slave
= NULL
;
4298 bond
->primary_slave
= NULL
;
4299 bond
->dev
= bond_dev
;
4300 INIT_LIST_HEAD(&bond
->vlan_list
);
4302 /* Initialize the device entry points */
4303 bond_dev
->open
= bond_open
;
4304 bond_dev
->stop
= bond_close
;
4305 bond_dev
->get_stats
= bond_get_stats
;
4306 bond_dev
->do_ioctl
= bond_do_ioctl
;
4307 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4308 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4309 bond_dev
->change_mtu
= bond_change_mtu
;
4310 bond_dev
->set_mac_address
= bond_set_mac_address
;
4312 bond_set_mode_ops(bond
, bond
->params
.mode
);
4314 bond_dev
->destructor
= free_netdev
;
4316 /* Initialize the device options */
4317 bond_dev
->tx_queue_len
= 0;
4318 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4319 bond_dev
->priv_flags
|= IFF_BONDING
;
4321 /* At first, we block adding VLANs. That's the only way to
4322 * prevent problems that occur when adding VLANs over an
4323 * empty bond. The block will be removed once non-challenged
4324 * slaves are enslaved.
4326 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4328 /* don't acquire bond device's netif_tx_lock when
4330 bond_dev
->features
|= NETIF_F_LLTX
;
4332 /* By default, we declare the bond to be fully
4333 * VLAN hardware accelerated capable. Special
4334 * care is taken in the various xmit functions
4335 * when there are slaves that are not hw accel
4338 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4339 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4340 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4341 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4342 NETIF_F_HW_VLAN_RX
|
4343 NETIF_F_HW_VLAN_FILTER
);
4345 #ifdef CONFIG_PROC_FS
4346 bond_create_proc_entry(bond
);
4349 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4354 /* De-initialize device specific data.
4355 * Caller must hold rtnl_lock.
4357 void bond_deinit(struct net_device
*bond_dev
)
4359 struct bonding
*bond
= bond_dev
->priv
;
4361 list_del(&bond
->bond_list
);
4363 #ifdef CONFIG_PROC_FS
4364 bond_remove_proc_entry(bond
);
4368 /* Unregister and free all bond devices.
4369 * Caller must hold rtnl_lock.
4371 static void bond_free_all(void)
4373 struct bonding
*bond
, *nxt
;
4375 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4376 struct net_device
*bond_dev
= bond
->dev
;
4378 bond_mc_list_destroy(bond
);
4379 /* Release the bonded slaves */
4380 bond_release_all(bond_dev
);
4381 unregister_netdevice(bond_dev
);
4382 bond_deinit(bond_dev
);
4385 #ifdef CONFIG_PROC_FS
4386 bond_destroy_proc_dir();
4390 /*------------------------- Module initialization ---------------------------*/
4393 * Convert string input module parms. Accept either the
4394 * number of the mode or its string name.
4396 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4400 for (i
= 0; tbl
[i
].modename
; i
++) {
4401 if ((isdigit(*mode_arg
) &&
4402 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4403 (strncmp(mode_arg
, tbl
[i
].modename
,
4404 strlen(tbl
[i
].modename
)) == 0)) {
4412 static int bond_check_params(struct bond_params
*params
)
4414 int arp_validate_value
;
4417 * Convert string parameters.
4420 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4421 if (bond_mode
== -1) {
4422 printk(KERN_ERR DRV_NAME
4423 ": Error: Invalid bonding mode \"%s\"\n",
4424 mode
== NULL
? "NULL" : mode
);
4429 if (xmit_hash_policy
) {
4430 if ((bond_mode
!= BOND_MODE_XOR
) &&
4431 (bond_mode
!= BOND_MODE_8023AD
)) {
4432 printk(KERN_INFO DRV_NAME
4433 ": xor_mode param is irrelevant in mode %s\n",
4434 bond_mode_name(bond_mode
));
4436 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4438 if (xmit_hashtype
== -1) {
4439 printk(KERN_ERR DRV_NAME
4440 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4441 xmit_hash_policy
== NULL
? "NULL" :
4449 if (bond_mode
!= BOND_MODE_8023AD
) {
4450 printk(KERN_INFO DRV_NAME
4451 ": lacp_rate param is irrelevant in mode %s\n",
4452 bond_mode_name(bond_mode
));
4454 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4455 if (lacp_fast
== -1) {
4456 printk(KERN_ERR DRV_NAME
4457 ": Error: Invalid lacp rate \"%s\"\n",
4458 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4464 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4465 printk(KERN_WARNING DRV_NAME
4466 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4467 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4468 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4469 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4473 printk(KERN_WARNING DRV_NAME
4474 ": Warning: miimon module parameter (%d), "
4475 "not in range 0-%d, so it was reset to %d\n",
4476 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4477 miimon
= BOND_LINK_MON_INTERV
;
4481 printk(KERN_WARNING DRV_NAME
4482 ": Warning: updelay module parameter (%d), "
4483 "not in range 0-%d, so it was reset to 0\n",
4488 if (downdelay
< 0) {
4489 printk(KERN_WARNING DRV_NAME
4490 ": Warning: downdelay module parameter (%d), "
4491 "not in range 0-%d, so it was reset to 0\n",
4492 downdelay
, INT_MAX
);
4496 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4497 printk(KERN_WARNING DRV_NAME
4498 ": Warning: use_carrier module parameter (%d), "
4499 "not of valid value (0/1), so it was set to 1\n",
4504 /* reset values for 802.3ad */
4505 if (bond_mode
== BOND_MODE_8023AD
) {
4507 printk(KERN_WARNING DRV_NAME
4508 ": Warning: miimon must be specified, "
4509 "otherwise bonding will not detect link "
4510 "failure, speed and duplex which are "
4511 "essential for 802.3ad operation\n");
4512 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4517 /* reset values for TLB/ALB */
4518 if ((bond_mode
== BOND_MODE_TLB
) ||
4519 (bond_mode
== BOND_MODE_ALB
)) {
4521 printk(KERN_WARNING DRV_NAME
4522 ": Warning: miimon must be specified, "
4523 "otherwise bonding will not detect link "
4524 "failure and link speed which are essential "
4525 "for TLB/ALB load balancing\n");
4526 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4531 if (bond_mode
== BOND_MODE_ALB
) {
4532 printk(KERN_NOTICE DRV_NAME
4533 ": In ALB mode you might experience client "
4534 "disconnections upon reconnection of a link if the "
4535 "bonding module updelay parameter (%d msec) is "
4536 "incompatible with the forwarding delay time of the "
4542 if (updelay
|| downdelay
) {
4543 /* just warn the user the up/down delay will have
4544 * no effect since miimon is zero...
4546 printk(KERN_WARNING DRV_NAME
4547 ": Warning: miimon module parameter not set "
4548 "and updelay (%d) or downdelay (%d) module "
4549 "parameter is set; updelay and downdelay have "
4550 "no effect unless miimon is set\n",
4551 updelay
, downdelay
);
4554 /* don't allow arp monitoring */
4556 printk(KERN_WARNING DRV_NAME
4557 ": Warning: miimon (%d) and arp_interval (%d) "
4558 "can't be used simultaneously, disabling ARP "
4560 miimon
, arp_interval
);
4564 if ((updelay
% miimon
) != 0) {
4565 printk(KERN_WARNING DRV_NAME
4566 ": Warning: updelay (%d) is not a multiple "
4567 "of miimon (%d), updelay rounded to %d ms\n",
4568 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4573 if ((downdelay
% miimon
) != 0) {
4574 printk(KERN_WARNING DRV_NAME
4575 ": Warning: downdelay (%d) is not a multiple "
4576 "of miimon (%d), downdelay rounded to %d ms\n",
4578 (downdelay
/ miimon
) * miimon
);
4581 downdelay
/= miimon
;
4584 if (arp_interval
< 0) {
4585 printk(KERN_WARNING DRV_NAME
4586 ": Warning: arp_interval module parameter (%d) "
4587 ", not in range 0-%d, so it was reset to %d\n",
4588 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4589 arp_interval
= BOND_LINK_ARP_INTERV
;
4592 for (arp_ip_count
= 0;
4593 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4595 /* not complete check, but should be good enough to
4597 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4598 printk(KERN_WARNING DRV_NAME
4599 ": Warning: bad arp_ip_target module parameter "
4600 "(%s), ARP monitoring will not be performed\n",
4601 arp_ip_target
[arp_ip_count
]);
4604 u32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4605 arp_target
[arp_ip_count
] = ip
;
4609 if (arp_interval
&& !arp_ip_count
) {
4610 /* don't allow arping if no arp_ip_target given... */
4611 printk(KERN_WARNING DRV_NAME
4612 ": Warning: arp_interval module parameter (%d) "
4613 "specified without providing an arp_ip_target "
4614 "parameter, arp_interval was reset to 0\n",
4620 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4621 printk(KERN_ERR DRV_NAME
4622 ": arp_validate only supported in active-backup mode\n");
4625 if (!arp_interval
) {
4626 printk(KERN_ERR DRV_NAME
4627 ": arp_validate requires arp_interval\n");
4631 arp_validate_value
= bond_parse_parm(arp_validate
,
4633 if (arp_validate_value
== -1) {
4634 printk(KERN_ERR DRV_NAME
4635 ": Error: invalid arp_validate \"%s\"\n",
4636 arp_validate
== NULL
? "NULL" : arp_validate
);
4640 arp_validate_value
= 0;
4643 printk(KERN_INFO DRV_NAME
4644 ": MII link monitoring set to %d ms\n",
4646 } else if (arp_interval
) {
4649 printk(KERN_INFO DRV_NAME
4650 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4652 arp_validate_tbl
[arp_validate_value
].modename
,
4655 for (i
= 0; i
< arp_ip_count
; i
++)
4656 printk (" %s", arp_ip_target
[i
]);
4661 /* miimon and arp_interval not set, we need one so things
4662 * work as expected, see bonding.txt for details
4664 printk(KERN_WARNING DRV_NAME
4665 ": Warning: either miimon or arp_interval and "
4666 "arp_ip_target module parameters must be specified, "
4667 "otherwise bonding will not detect link failures! see "
4668 "bonding.txt for details.\n");
4671 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4672 /* currently, using a primary only makes sense
4673 * in active backup, TLB or ALB modes
4675 printk(KERN_WARNING DRV_NAME
4676 ": Warning: %s primary device specified but has no "
4677 "effect in %s mode\n",
4678 primary
, bond_mode_name(bond_mode
));
4682 /* fill params struct with the proper values */
4683 params
->mode
= bond_mode
;
4684 params
->xmit_policy
= xmit_hashtype
;
4685 params
->miimon
= miimon
;
4686 params
->arp_interval
= arp_interval
;
4687 params
->arp_validate
= arp_validate_value
;
4688 params
->updelay
= updelay
;
4689 params
->downdelay
= downdelay
;
4690 params
->use_carrier
= use_carrier
;
4691 params
->lacp_fast
= lacp_fast
;
4692 params
->primary
[0] = 0;
4695 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4696 params
->primary
[IFNAMSIZ
- 1] = 0;
4699 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4704 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4706 /* Create a new bond based on the specified name and bonding parameters.
4707 * Caller must NOT hold rtnl_lock; we need to release it here before we
4708 * set up our sysfs entries.
4710 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4712 struct net_device
*bond_dev
;
4716 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
, ether_setup
);
4718 printk(KERN_ERR DRV_NAME
4719 ": %s: eek! can't alloc netdev!\n",
4725 /* bond_init() must be called after dev_alloc_name() (for the
4726 * /proc files), but before register_netdevice(), because we
4727 * need to set function pointers.
4730 res
= bond_init(bond_dev
, params
);
4735 SET_MODULE_OWNER(bond_dev
);
4737 res
= register_netdevice(bond_dev
);
4742 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4745 *newbond
= bond_dev
->priv
;
4747 netif_carrier_off(bond_dev
);
4749 rtnl_unlock(); /* allows sysfs registration of net device */
4750 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4753 bond_deinit(bond_dev
);
4755 free_netdev(bond_dev
);
4762 static int __init
bonding_init(void)
4766 char new_bond_name
[8]; /* Enough room for 999 bonds at init. */
4768 printk(KERN_INFO
"%s", version
);
4770 res
= bond_check_params(&bonding_defaults
);
4775 #ifdef CONFIG_PROC_FS
4776 bond_create_proc_dir();
4778 for (i
= 0; i
< max_bonds
; i
++) {
4779 sprintf(new_bond_name
, "bond%d",i
);
4780 res
= bond_create(new_bond_name
,&bonding_defaults
, NULL
);
4785 res
= bond_create_sysfs();
4789 register_netdevice_notifier(&bond_netdev_notifier
);
4790 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4796 bond_destroy_sysfs();
4803 static void __exit
bonding_exit(void)
4805 unregister_netdevice_notifier(&bond_netdev_notifier
);
4806 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4810 bond_destroy_sysfs();
4814 module_init(bonding_init
);
4815 module_exit(bonding_exit
);
4816 MODULE_LICENSE("GPL");
4817 MODULE_VERSION(DRV_VERSION
);
4818 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4819 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4820 MODULE_SUPPORTED_DEVICE("most ethernet devices");