2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 //#define BONDING_DEBUG 1
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
56 #include <asm/system.h>
59 #include <asm/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <net/route.h>
78 #include <net/net_namespace.h>
83 /*---------------------------- Module parameters ----------------------------*/
85 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
86 #define BOND_LINK_MON_INTERV 0
87 #define BOND_LINK_ARP_INTERV 0
89 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
90 static int miimon
= BOND_LINK_MON_INTERV
;
91 static int updelay
= 0;
92 static int downdelay
= 0;
93 static int use_carrier
= 1;
94 static char *mode
= NULL
;
95 static char *primary
= NULL
;
96 static char *lacp_rate
= NULL
;
97 static char *xmit_hash_policy
= NULL
;
98 static int arp_interval
= BOND_LINK_ARP_INTERV
;
99 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
100 static char *arp_validate
= NULL
;
101 static int fail_over_mac
= 0;
102 struct bond_params bonding_defaults
;
104 module_param(max_bonds
, int, 0);
105 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
106 module_param(miimon
, int, 0);
107 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
108 module_param(updelay
, int, 0);
109 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
110 module_param(downdelay
, int, 0);
111 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
113 module_param(use_carrier
, int, 0);
114 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
115 "0 for off, 1 for on (default)");
116 module_param(mode
, charp
, 0);
117 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
118 "1 for active-backup, 2 for balance-xor, "
119 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
120 "6 for balance-alb");
121 module_param(primary
, charp
, 0);
122 MODULE_PARM_DESC(primary
, "Primary network device to use");
123 module_param(lacp_rate
, charp
, 0);
124 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
126 module_param(xmit_hash_policy
, charp
, 0);
127 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
128 ", 1 for layer 3+4");
129 module_param(arp_interval
, int, 0);
130 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
131 module_param_array(arp_ip_target
, charp
, NULL
, 0);
132 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
133 module_param(arp_validate
, charp
, 0);
134 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
135 module_param(fail_over_mac
, int, 0);
136 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to the same MAC. 0 of off (default), 1 for on.");
138 /*----------------------------- Global variables ----------------------------*/
140 static const char * const version
=
141 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
143 LIST_HEAD(bond_dev_list
);
145 #ifdef CONFIG_PROC_FS
146 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
149 extern struct rw_semaphore bonding_rwsem
;
150 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
151 static int arp_ip_count
= 0;
152 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
153 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
154 static int lacp_fast
= 0;
157 struct bond_parm_tbl bond_lacp_tbl
[] = {
158 { "slow", AD_LACP_SLOW
},
159 { "fast", AD_LACP_FAST
},
163 struct bond_parm_tbl bond_mode_tbl
[] = {
164 { "balance-rr", BOND_MODE_ROUNDROBIN
},
165 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
166 { "balance-xor", BOND_MODE_XOR
},
167 { "broadcast", BOND_MODE_BROADCAST
},
168 { "802.3ad", BOND_MODE_8023AD
},
169 { "balance-tlb", BOND_MODE_TLB
},
170 { "balance-alb", BOND_MODE_ALB
},
174 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
175 { "layer2", BOND_XMIT_POLICY_LAYER2
},
176 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
180 struct bond_parm_tbl arp_validate_tbl
[] = {
181 { "none", BOND_ARP_VALIDATE_NONE
},
182 { "active", BOND_ARP_VALIDATE_ACTIVE
},
183 { "backup", BOND_ARP_VALIDATE_BACKUP
},
184 { "all", BOND_ARP_VALIDATE_ALL
},
188 /*-------------------------- Forward declarations ---------------------------*/
190 static void bond_send_gratuitous_arp(struct bonding
*bond
);
191 static void bond_deinit(struct net_device
*bond_dev
);
193 /*---------------------------- General routines -----------------------------*/
195 static const char *bond_mode_name(int mode
)
198 case BOND_MODE_ROUNDROBIN
:
199 return "load balancing (round-robin)";
200 case BOND_MODE_ACTIVEBACKUP
:
201 return "fault-tolerance (active-backup)";
203 return "load balancing (xor)";
204 case BOND_MODE_BROADCAST
:
205 return "fault-tolerance (broadcast)";
206 case BOND_MODE_8023AD
:
207 return "IEEE 802.3ad Dynamic link aggregation";
209 return "transmit load balancing";
211 return "adaptive load balancing";
217 /*---------------------------------- VLAN -----------------------------------*/
220 * bond_add_vlan - add a new vlan id on bond
221 * @bond: bond that got the notification
222 * @vlan_id: the vlan id to add
224 * Returns -ENOMEM if allocation failed.
226 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
228 struct vlan_entry
*vlan
;
230 dprintk("bond: %s, vlan id %d\n",
231 (bond
? bond
->dev
->name
: "None"), vlan_id
);
233 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
238 INIT_LIST_HEAD(&vlan
->vlan_list
);
239 vlan
->vlan_id
= vlan_id
;
242 write_lock_bh(&bond
->lock
);
244 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
246 write_unlock_bh(&bond
->lock
);
248 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
254 * bond_del_vlan - delete a vlan id from bond
255 * @bond: bond that got the notification
256 * @vlan_id: the vlan id to delete
258 * returns -ENODEV if @vlan_id was not found in @bond.
260 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
262 struct vlan_entry
*vlan
, *next
;
265 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
267 write_lock_bh(&bond
->lock
);
269 list_for_each_entry_safe(vlan
, next
, &bond
->vlan_list
, vlan_list
) {
270 if (vlan
->vlan_id
== vlan_id
) {
271 list_del(&vlan
->vlan_list
);
273 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
274 (bond
->params
.mode
== BOND_MODE_ALB
)) {
275 bond_alb_clear_vlan(bond
, vlan_id
);
278 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
283 if (list_empty(&bond
->vlan_list
) &&
284 (bond
->slave_cnt
== 0)) {
285 /* Last VLAN removed and no slaves, so
286 * restore block on adding VLANs. This will
287 * be removed once new slaves that are not
288 * VLAN challenged will be added.
290 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
298 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
302 write_unlock_bh(&bond
->lock
);
307 * bond_has_challenged_slaves
308 * @bond: the bond we're working on
310 * Searches the slave list. Returns 1 if a vlan challenged slave
311 * was found, 0 otherwise.
313 * Assumes bond->lock is held.
315 static int bond_has_challenged_slaves(struct bonding
*bond
)
320 bond_for_each_slave(bond
, slave
, i
) {
321 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
322 dprintk("found VLAN challenged slave - %s\n",
328 dprintk("no VLAN challenged slaves found\n");
333 * bond_next_vlan - safely skip to the next item in the vlans list.
334 * @bond: the bond we're working on
335 * @curr: item we're advancing from
337 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
338 * or @curr->next otherwise (even if it is @curr itself again).
340 * Caller must hold bond->lock
342 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
344 struct vlan_entry
*next
, *last
;
346 if (list_empty(&bond
->vlan_list
)) {
351 next
= list_entry(bond
->vlan_list
.next
,
352 struct vlan_entry
, vlan_list
);
354 last
= list_entry(bond
->vlan_list
.prev
,
355 struct vlan_entry
, vlan_list
);
357 next
= list_entry(bond
->vlan_list
.next
,
358 struct vlan_entry
, vlan_list
);
360 next
= list_entry(curr
->vlan_list
.next
,
361 struct vlan_entry
, vlan_list
);
369 * bond_dev_queue_xmit - Prepare skb for xmit.
371 * @bond: bond device that got this skb for tx.
372 * @skb: hw accel VLAN tagged skb to transmit
373 * @slave_dev: slave that is supposed to xmit this skbuff
375 * When the bond gets an skb to transmit that is
376 * already hardware accelerated VLAN tagged, and it
377 * needs to relay this skb to a slave that is not
378 * hw accel capable, the skb needs to be "unaccelerated",
379 * i.e. strip the hwaccel tag and re-insert it as part
382 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
384 unsigned short vlan_id
;
386 if (!list_empty(&bond
->vlan_list
) &&
387 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
388 vlan_get_tag(skb
, &vlan_id
) == 0) {
389 skb
->dev
= slave_dev
;
390 skb
= vlan_put_tag(skb
, vlan_id
);
392 /* vlan_put_tag() frees the skb in case of error,
393 * so return success here so the calling functions
394 * won't attempt to free is again.
399 skb
->dev
= slave_dev
;
409 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
410 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
412 * a. This operation is performed in IOCTL context,
413 * b. The operation is protected by the RTNL semaphore in the 8021q code,
414 * c. Holding a lock with BH disabled while directly calling a base driver
415 * entry point is generally a BAD idea.
417 * The design of synchronization/protection for this operation in the 8021q
418 * module is good for one or more VLAN devices over a single physical device
419 * and cannot be extended for a teaming solution like bonding, so there is a
420 * potential race condition here where a net device from the vlan group might
421 * be referenced (either by a base driver or the 8021q code) while it is being
422 * removed from the system. However, it turns out we're not making matters
423 * worse, and if it works for regular VLAN usage it will work here too.
427 * bond_vlan_rx_register - Propagates registration to slaves
428 * @bond_dev: bonding net device that got called
429 * @grp: vlan group being registered
431 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
433 struct bonding
*bond
= bond_dev
->priv
;
439 bond_for_each_slave(bond
, slave
, i
) {
440 struct net_device
*slave_dev
= slave
->dev
;
442 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
443 slave_dev
->vlan_rx_register
) {
444 slave_dev
->vlan_rx_register(slave_dev
, grp
);
450 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
451 * @bond_dev: bonding net device that got called
452 * @vid: vlan id being added
454 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
456 struct bonding
*bond
= bond_dev
->priv
;
460 bond_for_each_slave(bond
, slave
, i
) {
461 struct net_device
*slave_dev
= slave
->dev
;
463 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
464 slave_dev
->vlan_rx_add_vid
) {
465 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
469 res
= bond_add_vlan(bond
, vid
);
471 printk(KERN_ERR DRV_NAME
472 ": %s: Error: Failed to add vlan id %d\n",
473 bond_dev
->name
, vid
);
478 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
479 * @bond_dev: bonding net device that got called
480 * @vid: vlan id being removed
482 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
484 struct bonding
*bond
= bond_dev
->priv
;
486 struct net_device
*vlan_dev
;
489 bond_for_each_slave(bond
, slave
, i
) {
490 struct net_device
*slave_dev
= slave
->dev
;
492 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
493 slave_dev
->vlan_rx_kill_vid
) {
494 /* Save and then restore vlan_dev in the grp array,
495 * since the slave's driver might clear it.
497 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
498 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
499 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
503 res
= bond_del_vlan(bond
, vid
);
505 printk(KERN_ERR DRV_NAME
506 ": %s: Error: Failed to remove vlan id %d\n",
507 bond_dev
->name
, vid
);
511 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
513 struct vlan_entry
*vlan
;
515 write_lock_bh(&bond
->lock
);
517 if (list_empty(&bond
->vlan_list
)) {
521 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
522 slave_dev
->vlan_rx_register
) {
523 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
526 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
527 !(slave_dev
->vlan_rx_add_vid
)) {
531 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
532 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
536 write_unlock_bh(&bond
->lock
);
539 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
541 struct vlan_entry
*vlan
;
542 struct net_device
*vlan_dev
;
544 write_lock_bh(&bond
->lock
);
546 if (list_empty(&bond
->vlan_list
)) {
550 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
551 !(slave_dev
->vlan_rx_kill_vid
)) {
555 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
556 /* Save and then restore vlan_dev in the grp array,
557 * since the slave's driver might clear it.
559 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
560 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
561 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
565 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
566 slave_dev
->vlan_rx_register
) {
567 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
571 write_unlock_bh(&bond
->lock
);
574 /*------------------------------- Link status -------------------------------*/
577 * Set the carrier state for the master according to the state of its
578 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
579 * do special 802.3ad magic.
581 * Returns zero if carrier state does not change, nonzero if it does.
583 static int bond_set_carrier(struct bonding
*bond
)
588 if (bond
->slave_cnt
== 0)
591 if (bond
->params
.mode
== BOND_MODE_8023AD
)
592 return bond_3ad_set_carrier(bond
);
594 bond_for_each_slave(bond
, slave
, i
) {
595 if (slave
->link
== BOND_LINK_UP
) {
596 if (!netif_carrier_ok(bond
->dev
)) {
597 netif_carrier_on(bond
->dev
);
605 if (netif_carrier_ok(bond
->dev
)) {
606 netif_carrier_off(bond
->dev
);
613 * Get link speed and duplex from the slave's base driver
614 * using ethtool. If for some reason the call fails or the
615 * values are invalid, fake speed and duplex to 100/Full
618 static int bond_update_speed_duplex(struct slave
*slave
)
620 struct net_device
*slave_dev
= slave
->dev
;
621 struct ethtool_cmd etool
;
624 /* Fake speed and duplex */
625 slave
->speed
= SPEED_100
;
626 slave
->duplex
= DUPLEX_FULL
;
628 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
631 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
635 switch (etool
.speed
) {
645 switch (etool
.duplex
) {
653 slave
->speed
= etool
.speed
;
654 slave
->duplex
= etool
.duplex
;
660 * if <dev> supports MII link status reporting, check its link status.
662 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
663 * depening upon the setting of the use_carrier parameter.
665 * Return either BMSR_LSTATUS, meaning that the link is up (or we
666 * can't tell and just pretend it is), or 0, meaning that the link is
669 * If reporting is non-zero, instead of faking link up, return -1 if
670 * both ETHTOOL and MII ioctls fail (meaning the device does not
671 * support them). If use_carrier is set, return whatever it says.
672 * It'd be nice if there was a good way to tell if a driver supports
673 * netif_carrier, but there really isn't.
675 static int bond_check_dev_link(struct bonding
*bond
, struct net_device
*slave_dev
, int reporting
)
677 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
679 struct mii_ioctl_data
*mii
;
681 if (bond
->params
.use_carrier
) {
682 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
685 ioctl
= slave_dev
->do_ioctl
;
687 /* TODO: set pointer to correct ioctl on a per team member */
688 /* bases to make this more efficient. that is, once */
689 /* we determine the correct ioctl, we will always */
690 /* call it and not the others for that team */
694 * We cannot assume that SIOCGMIIPHY will also read a
695 * register; not all network drivers (e.g., e100)
699 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
700 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
702 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
703 mii
->reg_num
= MII_BMSR
;
704 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
705 return (mii
->val_out
& BMSR_LSTATUS
);
711 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
712 * attempt to get link status from it if the above MII ioctls fail.
714 if (slave_dev
->ethtool_ops
) {
715 if (slave_dev
->ethtool_ops
->get_link
) {
718 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
720 return link
? BMSR_LSTATUS
: 0;
725 * If reporting, report that either there's no dev->do_ioctl,
726 * or both SIOCGMIIREG and get_link failed (meaning that we
727 * cannot report link status). If not reporting, pretend
730 return (reporting
? -1 : BMSR_LSTATUS
);
733 /*----------------------------- Multicast list ------------------------------*/
736 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
738 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
740 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
741 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
745 * returns dmi entry if found, NULL otherwise
747 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
749 struct dev_mc_list
*idmi
;
751 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
752 if (bond_is_dmi_same(dmi
, idmi
)) {
761 * Push the promiscuity flag down to appropriate slaves
763 static void bond_set_promiscuity(struct bonding
*bond
, int inc
)
765 if (USES_PRIMARY(bond
->params
.mode
)) {
766 /* write lock already acquired */
767 if (bond
->curr_active_slave
) {
768 dev_set_promiscuity(bond
->curr_active_slave
->dev
, inc
);
773 bond_for_each_slave(bond
, slave
, i
) {
774 dev_set_promiscuity(slave
->dev
, inc
);
780 * Push the allmulti flag down to all slaves
782 static void bond_set_allmulti(struct bonding
*bond
, int inc
)
784 if (USES_PRIMARY(bond
->params
.mode
)) {
785 /* write lock already acquired */
786 if (bond
->curr_active_slave
) {
787 dev_set_allmulti(bond
->curr_active_slave
->dev
, inc
);
792 bond_for_each_slave(bond
, slave
, i
) {
793 dev_set_allmulti(slave
->dev
, inc
);
799 * Add a Multicast address to slaves
802 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
804 if (USES_PRIMARY(bond
->params
.mode
)) {
805 /* write lock already acquired */
806 if (bond
->curr_active_slave
) {
807 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
812 bond_for_each_slave(bond
, slave
, i
) {
813 dev_mc_add(slave
->dev
, addr
, alen
, 0);
819 * Remove a multicast address from slave
822 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
824 if (USES_PRIMARY(bond
->params
.mode
)) {
825 /* write lock already acquired */
826 if (bond
->curr_active_slave
) {
827 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
832 bond_for_each_slave(bond
, slave
, i
) {
833 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
840 * Retrieve the list of registered multicast addresses for the bonding
841 * device and retransmit an IGMP JOIN request to the current active
844 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
846 struct in_device
*in_dev
;
847 struct ip_mc_list
*im
;
850 in_dev
= __in_dev_get_rcu(bond
->dev
);
852 for (im
= in_dev
->mc_list
; im
; im
= im
->next
) {
853 ip_mc_rejoin_group(im
);
861 * Totally destroys the mc_list in bond
863 static void bond_mc_list_destroy(struct bonding
*bond
)
865 struct dev_mc_list
*dmi
;
869 bond
->mc_list
= dmi
->next
;
873 bond
->mc_list
= NULL
;
877 * Copy all the Multicast addresses from src to the bonding device dst
879 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
882 struct dev_mc_list
*dmi
, *new_dmi
;
884 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
885 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
888 /* FIXME: Potential memory leak !!! */
892 new_dmi
->next
= bond
->mc_list
;
893 bond
->mc_list
= new_dmi
;
894 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
895 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
896 new_dmi
->dmi_users
= dmi
->dmi_users
;
897 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
904 * flush all members of flush->mc_list from device dev->mc_list
906 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
908 struct bonding
*bond
= bond_dev
->priv
;
909 struct dev_mc_list
*dmi
;
911 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
912 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
915 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
916 /* del lacpdu mc addr from mc list */
917 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
919 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
923 /*--------------------------- Active slave change ---------------------------*/
926 * Update the mc list and multicast-related flags for the new and
927 * old active slaves (if any) according to the multicast mode, and
928 * promiscuous flags unconditionally.
930 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
932 struct dev_mc_list
*dmi
;
934 if (!USES_PRIMARY(bond
->params
.mode
)) {
935 /* nothing to do - mc list is already up-to-date on
942 if (bond
->dev
->flags
& IFF_PROMISC
) {
943 dev_set_promiscuity(old_active
->dev
, -1);
946 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
947 dev_set_allmulti(old_active
->dev
, -1);
950 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
951 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
956 if (bond
->dev
->flags
& IFF_PROMISC
) {
957 dev_set_promiscuity(new_active
->dev
, 1);
960 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
961 dev_set_allmulti(new_active
->dev
, 1);
964 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
965 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
967 bond_resend_igmp_join_requests(bond
);
972 * find_best_interface - select the best available slave to be the active one
973 * @bond: our bonding struct
975 * Warning: Caller must hold curr_slave_lock for writing.
977 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
979 struct slave
*new_active
, *old_active
;
980 struct slave
*bestslave
= NULL
;
981 int mintime
= bond
->params
.updelay
;
984 new_active
= old_active
= bond
->curr_active_slave
;
986 if (!new_active
) { /* there were no active slaves left */
987 if (bond
->slave_cnt
> 0) { /* found one slave */
988 new_active
= bond
->first_slave
;
990 return NULL
; /* still no slave, return NULL */
994 /* first try the primary link; if arping, a link must tx/rx traffic
995 * before it can be considered the curr_active_slave - also, we would skip
996 * slaves between the curr_active_slave and primary_slave that may be up
999 if ((bond
->primary_slave
) &&
1000 (!bond
->params
.arp_interval
) &&
1001 (IS_UP(bond
->primary_slave
->dev
))) {
1002 new_active
= bond
->primary_slave
;
1005 /* remember where to stop iterating over the slaves */
1006 old_active
= new_active
;
1008 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1009 if (IS_UP(new_active
->dev
)) {
1010 if (new_active
->link
== BOND_LINK_UP
) {
1012 } else if (new_active
->link
== BOND_LINK_BACK
) {
1013 /* link up, but waiting for stabilization */
1014 if (new_active
->delay
< mintime
) {
1015 mintime
= new_active
->delay
;
1016 bestslave
= new_active
;
1026 * change_active_interface - change the active slave into the specified one
1027 * @bond: our bonding struct
1028 * @new: the new slave to make the active one
1030 * Set the new slave to the bond's settings and unset them on the old
1031 * curr_active_slave.
1032 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1034 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1035 * because it is apparently the best available slave we have, even though its
1036 * updelay hasn't timed out yet.
1038 * Warning: Caller must hold curr_slave_lock for writing.
1040 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1042 struct slave
*old_active
= bond
->curr_active_slave
;
1044 if (old_active
== new_active
) {
1049 if (new_active
->link
== BOND_LINK_BACK
) {
1050 if (USES_PRIMARY(bond
->params
.mode
)) {
1051 printk(KERN_INFO DRV_NAME
1052 ": %s: making interface %s the new "
1053 "active one %d ms earlier.\n",
1054 bond
->dev
->name
, new_active
->dev
->name
,
1055 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1058 new_active
->delay
= 0;
1059 new_active
->link
= BOND_LINK_UP
;
1060 new_active
->jiffies
= jiffies
;
1062 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1063 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1066 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1067 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1068 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1071 if (USES_PRIMARY(bond
->params
.mode
)) {
1072 printk(KERN_INFO DRV_NAME
1073 ": %s: making interface %s the new "
1075 bond
->dev
->name
, new_active
->dev
->name
);
1080 if (USES_PRIMARY(bond
->params
.mode
)) {
1081 bond_mc_swap(bond
, new_active
, old_active
);
1084 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1085 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1086 bond_alb_handle_active_change(bond
, new_active
);
1088 bond_set_slave_inactive_flags(old_active
);
1090 bond_set_slave_active_flags(new_active
);
1092 bond
->curr_active_slave
= new_active
;
1095 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1097 bond_set_slave_inactive_flags(old_active
);
1101 bond_set_slave_active_flags(new_active
);
1104 /* when bonding does not set the slave MAC address, the bond MAC
1105 * address is the one of the active slave.
1107 if (new_active
&& bond
->params
.fail_over_mac
)
1108 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
1109 new_active
->dev
->addr_len
);
1110 if (bond
->curr_active_slave
&&
1111 test_bit(__LINK_STATE_LINKWATCH_PENDING
,
1112 &bond
->curr_active_slave
->dev
->state
)) {
1113 dprintk("delaying gratuitous arp on %s\n",
1114 bond
->curr_active_slave
->dev
->name
);
1115 bond
->send_grat_arp
= 1;
1117 bond_send_gratuitous_arp(bond
);
1122 * bond_select_active_slave - select a new active slave, if needed
1123 * @bond: our bonding struct
1125 * This functions shoud be called when one of the following occurs:
1126 * - The old curr_active_slave has been released or lost its link.
1127 * - The primary_slave has got its link back.
1128 * - A slave has got its link back and there's no old curr_active_slave.
1130 * Warning: Caller must hold curr_slave_lock for writing.
1132 void bond_select_active_slave(struct bonding
*bond
)
1134 struct slave
*best_slave
;
1137 best_slave
= bond_find_best_slave(bond
);
1138 if (best_slave
!= bond
->curr_active_slave
) {
1139 bond_change_active_slave(bond
, best_slave
);
1140 rv
= bond_set_carrier(bond
);
1144 if (netif_carrier_ok(bond
->dev
)) {
1145 printk(KERN_INFO DRV_NAME
1146 ": %s: first active interface up!\n",
1149 printk(KERN_INFO DRV_NAME
": %s: "
1150 "now running without any active interface !\n",
1156 /*--------------------------- slave list handling ---------------------------*/
1159 * This function attaches the slave to the end of list.
1161 * bond->lock held for writing by caller.
1163 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1165 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1166 new_slave
->next
= new_slave
;
1167 new_slave
->prev
= new_slave
;
1168 bond
->first_slave
= new_slave
;
1170 new_slave
->next
= bond
->first_slave
;
1171 new_slave
->prev
= bond
->first_slave
->prev
;
1172 new_slave
->next
->prev
= new_slave
;
1173 new_slave
->prev
->next
= new_slave
;
1180 * This function detaches the slave from the list.
1181 * WARNING: no check is made to verify if the slave effectively
1182 * belongs to <bond>.
1183 * Nothing is freed on return, structures are just unchained.
1184 * If any slave pointer in bond was pointing to <slave>,
1185 * it should be changed by the calling function.
1187 * bond->lock held for writing by caller.
1189 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1192 slave
->next
->prev
= slave
->prev
;
1196 slave
->prev
->next
= slave
->next
;
1199 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1200 if (bond
->slave_cnt
> 1) { /* there are more slave */
1201 bond
->first_slave
= slave
->next
;
1203 bond
->first_slave
= NULL
; /* slave was the last one */
1212 /*---------------------------------- IOCTL ----------------------------------*/
1214 static int bond_sethwaddr(struct net_device
*bond_dev
,
1215 struct net_device
*slave_dev
)
1217 dprintk("bond_dev=%p\n", bond_dev
);
1218 dprintk("slave_dev=%p\n", slave_dev
);
1219 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1220 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1224 #define BOND_VLAN_FEATURES \
1225 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1226 NETIF_F_HW_VLAN_FILTER)
1229 * Compute the common dev->feature set available to all slaves. Some
1230 * feature bits are managed elsewhere, so preserve those feature bits
1231 * on the master device.
1233 static int bond_compute_features(struct bonding
*bond
)
1235 struct slave
*slave
;
1236 struct net_device
*bond_dev
= bond
->dev
;
1237 unsigned long features
= bond_dev
->features
;
1238 unsigned short max_hard_header_len
= max((u16
)ETH_HLEN
,
1239 bond_dev
->hard_header_len
);
1242 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1243 features
|= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
1244 NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1246 bond_for_each_slave(bond
, slave
, i
) {
1247 features
= netdev_compute_features(features
,
1248 slave
->dev
->features
);
1249 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1250 max_hard_header_len
= slave
->dev
->hard_header_len
;
1253 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1254 bond_dev
->features
= features
;
1255 bond_dev
->hard_header_len
= max_hard_header_len
;
1261 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1262 struct net_device
*slave_dev
)
1264 struct bonding
*bond
= bond_dev
->priv
;
1266 bond_dev
->neigh_setup
= slave_dev
->neigh_setup
;
1267 bond_dev
->header_ops
= slave_dev
->header_ops
;
1269 bond_dev
->type
= slave_dev
->type
;
1270 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1271 bond_dev
->addr_len
= slave_dev
->addr_len
;
1273 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1274 slave_dev
->addr_len
);
1275 bond
->setup_by_slave
= 1;
1278 /* enslave device <slave> to bond device <master> */
1279 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1281 struct bonding
*bond
= bond_dev
->priv
;
1282 struct slave
*new_slave
= NULL
;
1283 struct dev_mc_list
*dmi
;
1284 struct sockaddr addr
;
1286 int old_features
= bond_dev
->features
;
1289 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1290 slave_dev
->do_ioctl
== NULL
) {
1291 printk(KERN_WARNING DRV_NAME
1292 ": %s: Warning: no link monitoring support for %s\n",
1293 bond_dev
->name
, slave_dev
->name
);
1296 /* bond must be initialized by bond_open() before enslaving */
1297 if (!(bond_dev
->flags
& IFF_UP
)) {
1298 printk(KERN_WARNING DRV_NAME
1299 " %s: master_dev is not up in bond_enslave\n",
1303 /* already enslaved */
1304 if (slave_dev
->flags
& IFF_SLAVE
) {
1305 dprintk("Error, Device was already enslaved\n");
1309 /* vlan challenged mutual exclusion */
1310 /* no need to lock since we're protected by rtnl_lock */
1311 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1312 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1313 if (!list_empty(&bond
->vlan_list
)) {
1314 printk(KERN_ERR DRV_NAME
1315 ": %s: Error: cannot enslave VLAN "
1316 "challenged slave %s on VLAN enabled "
1317 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1321 printk(KERN_WARNING DRV_NAME
1322 ": %s: Warning: enslaved VLAN challenged "
1323 "slave %s. Adding VLANs will be blocked as "
1324 "long as %s is part of bond %s\n",
1325 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1327 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1330 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1331 if (bond
->slave_cnt
== 0) {
1332 /* First slave, and it is not VLAN challenged,
1333 * so remove the block of adding VLANs over the bond.
1335 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1340 * Old ifenslave binaries are no longer supported. These can
1341 * be identified with moderate accurary by the state of the slave:
1342 * the current ifenslave will set the interface down prior to
1343 * enslaving it; the old ifenslave will not.
1345 if ((slave_dev
->flags
& IFF_UP
)) {
1346 printk(KERN_ERR DRV_NAME
": %s is up. "
1347 "This may be due to an out of date ifenslave.\n",
1350 goto err_undo_flags
;
1353 /* set bonding device ether type by slave - bonding netdevices are
1354 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1355 * there is a need to override some of the type dependent attribs/funcs.
1357 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1358 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1360 if (bond
->slave_cnt
== 0) {
1361 if (slave_dev
->type
!= ARPHRD_ETHER
)
1362 bond_setup_by_slave(bond_dev
, slave_dev
);
1363 } else if (bond_dev
->type
!= slave_dev
->type
) {
1364 printk(KERN_ERR DRV_NAME
": %s ether type (%d) is different "
1365 "from other slaves (%d), can not enslave it.\n",
1367 slave_dev
->type
, bond_dev
->type
);
1369 goto err_undo_flags
;
1372 if (slave_dev
->set_mac_address
== NULL
) {
1373 if (bond
->slave_cnt
== 0) {
1374 printk(KERN_WARNING DRV_NAME
1375 ": %s: Warning: The first slave device "
1376 "specified does not support setting the MAC "
1377 "address. Enabling the fail_over_mac option.",
1379 bond
->params
.fail_over_mac
= 1;
1380 } else if (!bond
->params
.fail_over_mac
) {
1381 printk(KERN_ERR DRV_NAME
1382 ": %s: Error: The slave device specified "
1383 "does not support setting the MAC address, "
1384 "but fail_over_mac is not enabled.\n"
1387 goto err_undo_flags
;
1391 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1394 goto err_undo_flags
;
1397 /* save slave's original flags before calling
1398 * netdev_set_master and dev_open
1400 new_slave
->original_flags
= slave_dev
->flags
;
1403 * Save slave's original ("permanent") mac address for modes
1404 * that need it, and for restoring it upon release, and then
1405 * set it to the master's address
1407 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1409 if (!bond
->params
.fail_over_mac
) {
1411 * Set slave to master's mac address. The application already
1412 * set the master's mac address to that of the first slave
1414 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1415 addr
.sa_family
= slave_dev
->type
;
1416 res
= dev_set_mac_address(slave_dev
, &addr
);
1418 dprintk("Error %d calling set_mac_address\n", res
);
1423 res
= netdev_set_master(slave_dev
, bond_dev
);
1425 dprintk("Error %d calling netdev_set_master\n", res
);
1428 /* open the slave since the application closed it */
1429 res
= dev_open(slave_dev
);
1431 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1432 goto err_restore_mac
;
1435 new_slave
->dev
= slave_dev
;
1436 slave_dev
->priv_flags
|= IFF_BONDING
;
1438 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1439 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1440 /* bond_alb_init_slave() must be called before all other stages since
1441 * it might fail and we do not want to have to undo everything
1443 res
= bond_alb_init_slave(bond
, new_slave
);
1445 goto err_unset_master
;
1449 /* If the mode USES_PRIMARY, then the new slave gets the
1450 * master's promisc (and mc) settings only if it becomes the
1451 * curr_active_slave, and that is taken care of later when calling
1452 * bond_change_active()
1454 if (!USES_PRIMARY(bond
->params
.mode
)) {
1455 /* set promiscuity level to new slave */
1456 if (bond_dev
->flags
& IFF_PROMISC
) {
1457 dev_set_promiscuity(slave_dev
, 1);
1460 /* set allmulti level to new slave */
1461 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1462 dev_set_allmulti(slave_dev
, 1);
1465 /* upload master's mc_list to new slave */
1466 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1467 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1471 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1472 /* add lacpdu mc addr to mc list */
1473 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1475 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1478 bond_add_vlans_on_slave(bond
, slave_dev
);
1480 write_lock_bh(&bond
->lock
);
1482 bond_attach_slave(bond
, new_slave
);
1484 new_slave
->delay
= 0;
1485 new_slave
->link_failure_count
= 0;
1487 bond_compute_features(bond
);
1489 new_slave
->last_arp_rx
= jiffies
;
1491 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1492 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1494 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1496 * miimon is set but a bonded network driver
1497 * does not support ETHTOOL/MII and
1498 * arp_interval is not set. Note: if
1499 * use_carrier is enabled, we will never go
1500 * here (because netif_carrier is always
1501 * supported); thus, we don't need to change
1502 * the messages for netif_carrier.
1504 printk(KERN_WARNING DRV_NAME
1505 ": %s: Warning: MII and ETHTOOL support not "
1506 "available for interface %s, and "
1507 "arp_interval/arp_ip_target module parameters "
1508 "not specified, thus bonding will not detect "
1509 "link failures! see bonding.txt for details.\n",
1510 bond_dev
->name
, slave_dev
->name
);
1511 } else if (link_reporting
== -1) {
1512 /* unable get link status using mii/ethtool */
1513 printk(KERN_WARNING DRV_NAME
1514 ": %s: Warning: can't get link status from "
1515 "interface %s; the network driver associated "
1516 "with this interface does not support MII or "
1517 "ETHTOOL link status reporting, thus miimon "
1518 "has no effect on this interface.\n",
1519 bond_dev
->name
, slave_dev
->name
);
1523 /* check for initial state */
1524 if (!bond
->params
.miimon
||
1525 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1526 if (bond
->params
.updelay
) {
1527 dprintk("Initial state of slave_dev is "
1528 "BOND_LINK_BACK\n");
1529 new_slave
->link
= BOND_LINK_BACK
;
1530 new_slave
->delay
= bond
->params
.updelay
;
1532 dprintk("Initial state of slave_dev is "
1534 new_slave
->link
= BOND_LINK_UP
;
1536 new_slave
->jiffies
= jiffies
;
1538 dprintk("Initial state of slave_dev is "
1539 "BOND_LINK_DOWN\n");
1540 new_slave
->link
= BOND_LINK_DOWN
;
1543 if (bond_update_speed_duplex(new_slave
) &&
1544 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1545 printk(KERN_WARNING DRV_NAME
1546 ": %s: Warning: failed to get speed and duplex from %s, "
1547 "assumed to be 100Mb/sec and Full.\n",
1548 bond_dev
->name
, new_slave
->dev
->name
);
1550 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1551 printk(KERN_WARNING DRV_NAME
1552 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1553 "support in base driver for proper aggregator "
1554 "selection.\n", bond_dev
->name
);
1558 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1559 /* if there is a primary slave, remember it */
1560 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1561 bond
->primary_slave
= new_slave
;
1565 switch (bond
->params
.mode
) {
1566 case BOND_MODE_ACTIVEBACKUP
:
1567 bond_set_slave_inactive_flags(new_slave
);
1568 bond_select_active_slave(bond
);
1570 case BOND_MODE_8023AD
:
1571 /* in 802.3ad mode, the internal mechanism
1572 * will activate the slaves in the selected
1575 bond_set_slave_inactive_flags(new_slave
);
1576 /* if this is the first slave */
1577 if (bond
->slave_cnt
== 1) {
1578 SLAVE_AD_INFO(new_slave
).id
= 1;
1579 /* Initialize AD with the number of times that the AD timer is called in 1 second
1580 * can be called only after the mac address of the bond is set
1582 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1583 bond
->params
.lacp_fast
);
1585 SLAVE_AD_INFO(new_slave
).id
=
1586 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1589 bond_3ad_bind_slave(new_slave
);
1593 new_slave
->state
= BOND_STATE_ACTIVE
;
1594 bond_set_slave_inactive_flags(new_slave
);
1597 dprintk("This slave is always active in trunk mode\n");
1599 /* always active in trunk mode */
1600 new_slave
->state
= BOND_STATE_ACTIVE
;
1602 /* In trunking mode there is little meaning to curr_active_slave
1603 * anyway (it holds no special properties of the bond device),
1604 * so we can change it without calling change_active_interface()
1606 if (!bond
->curr_active_slave
) {
1607 bond
->curr_active_slave
= new_slave
;
1610 } /* switch(bond_mode) */
1612 bond_set_carrier(bond
);
1614 write_unlock_bh(&bond
->lock
);
1616 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1618 goto err_unset_master
;
1620 printk(KERN_INFO DRV_NAME
1621 ": %s: enslaving %s as a%s interface with a%s link.\n",
1622 bond_dev
->name
, slave_dev
->name
,
1623 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1624 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1626 /* enslave is successful */
1629 /* Undo stages on error */
1631 netdev_set_master(slave_dev
, NULL
);
1634 dev_close(slave_dev
);
1637 if (!bond
->params
.fail_over_mac
) {
1638 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1639 addr
.sa_family
= slave_dev
->type
;
1640 dev_set_mac_address(slave_dev
, &addr
);
1647 bond_dev
->features
= old_features
;
1653 * Try to release the slave device <slave> from the bond device <master>
1654 * It is legal to access curr_active_slave without a lock because all the function
1657 * The rules for slave state should be:
1658 * for Active/Backup:
1659 * Active stays on all backups go down
1660 * for Bonded connections:
1661 * The first up interface should be left on and all others downed.
1663 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1665 struct bonding
*bond
= bond_dev
->priv
;
1666 struct slave
*slave
, *oldcurrent
;
1667 struct sockaddr addr
;
1668 int mac_addr_differ
;
1669 DECLARE_MAC_BUF(mac
);
1671 /* slave is not a slave or master is not master of this slave */
1672 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1673 (slave_dev
->master
!= bond_dev
)) {
1674 printk(KERN_ERR DRV_NAME
1675 ": %s: Error: cannot release %s.\n",
1676 bond_dev
->name
, slave_dev
->name
);
1680 write_lock_bh(&bond
->lock
);
1682 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1684 /* not a slave of this bond */
1685 printk(KERN_INFO DRV_NAME
1686 ": %s: %s not enslaved\n",
1687 bond_dev
->name
, slave_dev
->name
);
1688 write_unlock_bh(&bond
->lock
);
1692 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1695 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1696 printk(KERN_WARNING DRV_NAME
1697 ": %s: Warning: the permanent HWaddr of %s - "
1698 "%s - is still in use by %s. "
1699 "Set the HWaddr of %s to a different address "
1700 "to avoid conflicts.\n",
1703 print_mac(mac
, slave
->perm_hwaddr
),
1708 /* Inform AD package of unbinding of slave. */
1709 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1710 /* must be called before the slave is
1711 * detached from the list
1713 bond_3ad_unbind_slave(slave
);
1716 printk(KERN_INFO DRV_NAME
1717 ": %s: releasing %s interface %s\n",
1719 (slave
->state
== BOND_STATE_ACTIVE
)
1720 ? "active" : "backup",
1723 oldcurrent
= bond
->curr_active_slave
;
1725 bond
->current_arp_slave
= NULL
;
1727 /* release the slave from its bond */
1728 bond_detach_slave(bond
, slave
);
1730 bond_compute_features(bond
);
1732 if (bond
->primary_slave
== slave
) {
1733 bond
->primary_slave
= NULL
;
1736 if (oldcurrent
== slave
) {
1737 bond_change_active_slave(bond
, NULL
);
1740 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1741 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1742 /* Must be called only after the slave has been
1743 * detached from the list and the curr_active_slave
1744 * has been cleared (if our_slave == old_current),
1745 * but before a new active slave is selected.
1747 bond_alb_deinit_slave(bond
, slave
);
1750 if (oldcurrent
== slave
) {
1752 * Note that we hold RTNL over this sequence, so there
1753 * is no concern that another slave add/remove event
1756 write_unlock_bh(&bond
->lock
);
1757 read_lock(&bond
->lock
);
1758 write_lock_bh(&bond
->curr_slave_lock
);
1760 bond_select_active_slave(bond
);
1762 write_unlock_bh(&bond
->curr_slave_lock
);
1763 read_unlock(&bond
->lock
);
1764 write_lock_bh(&bond
->lock
);
1767 if (bond
->slave_cnt
== 0) {
1768 bond_set_carrier(bond
);
1770 /* if the last slave was removed, zero the mac address
1771 * of the master so it will be set by the application
1772 * to the mac address of the first slave
1774 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1776 if (list_empty(&bond
->vlan_list
)) {
1777 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1779 printk(KERN_WARNING DRV_NAME
1780 ": %s: Warning: clearing HW address of %s while it "
1781 "still has VLANs.\n",
1782 bond_dev
->name
, bond_dev
->name
);
1783 printk(KERN_WARNING DRV_NAME
1784 ": %s: When re-adding slaves, make sure the bond's "
1785 "HW address matches its VLANs'.\n",
1788 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1789 !bond_has_challenged_slaves(bond
)) {
1790 printk(KERN_INFO DRV_NAME
1791 ": %s: last VLAN challenged slave %s "
1792 "left bond %s. VLAN blocking is removed\n",
1793 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1794 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1797 write_unlock_bh(&bond
->lock
);
1799 /* must do this from outside any spinlocks */
1800 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1802 bond_del_vlans_from_slave(bond
, slave_dev
);
1804 /* If the mode USES_PRIMARY, then we should only remove its
1805 * promisc and mc settings if it was the curr_active_slave, but that was
1806 * already taken care of above when we detached the slave
1808 if (!USES_PRIMARY(bond
->params
.mode
)) {
1809 /* unset promiscuity level from slave */
1810 if (bond_dev
->flags
& IFF_PROMISC
) {
1811 dev_set_promiscuity(slave_dev
, -1);
1814 /* unset allmulti level from slave */
1815 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1816 dev_set_allmulti(slave_dev
, -1);
1819 /* flush master's mc_list from slave */
1820 bond_mc_list_flush(bond_dev
, slave_dev
);
1823 netdev_set_master(slave_dev
, NULL
);
1825 /* close slave before restoring its mac address */
1826 dev_close(slave_dev
);
1828 if (!bond
->params
.fail_over_mac
) {
1829 /* restore original ("permanent") mac address */
1830 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1831 addr
.sa_family
= slave_dev
->type
;
1832 dev_set_mac_address(slave_dev
, &addr
);
1835 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1836 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1841 return 0; /* deletion OK */
1845 * Destroy a bonding device.
1846 * Must be under rtnl_lock when this function is called.
1848 void bond_destroy(struct bonding
*bond
)
1850 unregister_netdevice(bond
->dev
);
1851 bond_deinit(bond
->dev
);
1852 bond_destroy_sysfs_entry(bond
);
1856 * First release a slave and than destroy the bond if no more slaves iare left.
1857 * Must be under rtnl_lock when this function is called.
1859 int bond_release_and_destroy(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1861 struct bonding
*bond
= bond_dev
->priv
;
1864 ret
= bond_release(bond_dev
, slave_dev
);
1865 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
1866 printk(KERN_INFO DRV_NAME
": %s: destroying bond %s.\n",
1867 bond_dev
->name
, bond_dev
->name
);
1874 * This function releases all slaves.
1876 static int bond_release_all(struct net_device
*bond_dev
)
1878 struct bonding
*bond
= bond_dev
->priv
;
1879 struct slave
*slave
;
1880 struct net_device
*slave_dev
;
1881 struct sockaddr addr
;
1883 write_lock_bh(&bond
->lock
);
1885 netif_carrier_off(bond_dev
);
1887 if (bond
->slave_cnt
== 0) {
1891 bond
->current_arp_slave
= NULL
;
1892 bond
->primary_slave
= NULL
;
1893 bond_change_active_slave(bond
, NULL
);
1895 while ((slave
= bond
->first_slave
) != NULL
) {
1896 /* Inform AD package of unbinding of slave
1897 * before slave is detached from the list.
1899 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1900 bond_3ad_unbind_slave(slave
);
1903 slave_dev
= slave
->dev
;
1904 bond_detach_slave(bond
, slave
);
1906 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1907 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1908 /* must be called only after the slave
1909 * has been detached from the list
1911 bond_alb_deinit_slave(bond
, slave
);
1914 bond_compute_features(bond
);
1916 /* now that the slave is detached, unlock and perform
1917 * all the undo steps that should not be called from
1920 write_unlock_bh(&bond
->lock
);
1922 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1923 bond_del_vlans_from_slave(bond
, slave_dev
);
1925 /* If the mode USES_PRIMARY, then we should only remove its
1926 * promisc and mc settings if it was the curr_active_slave, but that was
1927 * already taken care of above when we detached the slave
1929 if (!USES_PRIMARY(bond
->params
.mode
)) {
1930 /* unset promiscuity level from slave */
1931 if (bond_dev
->flags
& IFF_PROMISC
) {
1932 dev_set_promiscuity(slave_dev
, -1);
1935 /* unset allmulti level from slave */
1936 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1937 dev_set_allmulti(slave_dev
, -1);
1940 /* flush master's mc_list from slave */
1941 bond_mc_list_flush(bond_dev
, slave_dev
);
1944 netdev_set_master(slave_dev
, NULL
);
1946 /* close slave before restoring its mac address */
1947 dev_close(slave_dev
);
1949 if (!bond
->params
.fail_over_mac
) {
1950 /* restore original ("permanent") mac address*/
1951 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1952 addr
.sa_family
= slave_dev
->type
;
1953 dev_set_mac_address(slave_dev
, &addr
);
1956 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1957 IFF_SLAVE_INACTIVE
);
1961 /* re-acquire the lock before getting the next slave */
1962 write_lock_bh(&bond
->lock
);
1965 /* zero the mac address of the master so it will be
1966 * set by the application to the mac address of the
1969 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1971 if (list_empty(&bond
->vlan_list
)) {
1972 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1974 printk(KERN_WARNING DRV_NAME
1975 ": %s: Warning: clearing HW address of %s while it "
1976 "still has VLANs.\n",
1977 bond_dev
->name
, bond_dev
->name
);
1978 printk(KERN_WARNING DRV_NAME
1979 ": %s: When re-adding slaves, make sure the bond's "
1980 "HW address matches its VLANs'.\n",
1984 printk(KERN_INFO DRV_NAME
1985 ": %s: released all slaves\n",
1989 write_unlock_bh(&bond
->lock
);
1995 * This function changes the active slave to slave <slave_dev>.
1996 * It returns -EINVAL in the following cases.
1997 * - <slave_dev> is not found in the list.
1998 * - There is not active slave now.
1999 * - <slave_dev> is already active.
2000 * - The link state of <slave_dev> is not BOND_LINK_UP.
2001 * - <slave_dev> is not running.
2002 * In these cases, this fuction does nothing.
2003 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2005 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2007 struct bonding
*bond
= bond_dev
->priv
;
2008 struct slave
*old_active
= NULL
;
2009 struct slave
*new_active
= NULL
;
2012 if (!USES_PRIMARY(bond
->params
.mode
)) {
2016 /* Verify that master_dev is indeed the master of slave_dev */
2017 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
2018 (slave_dev
->master
!= bond_dev
)) {
2022 read_lock(&bond
->lock
);
2024 read_lock(&bond
->curr_slave_lock
);
2025 old_active
= bond
->curr_active_slave
;
2026 read_unlock(&bond
->curr_slave_lock
);
2028 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2031 * Changing to the current active: do nothing; return success.
2033 if (new_active
&& (new_active
== old_active
)) {
2034 read_unlock(&bond
->lock
);
2040 (new_active
->link
== BOND_LINK_UP
) &&
2041 IS_UP(new_active
->dev
)) {
2042 write_lock_bh(&bond
->curr_slave_lock
);
2043 bond_change_active_slave(bond
, new_active
);
2044 write_unlock_bh(&bond
->curr_slave_lock
);
2049 read_unlock(&bond
->lock
);
2054 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2056 struct bonding
*bond
= bond_dev
->priv
;
2058 info
->bond_mode
= bond
->params
.mode
;
2059 info
->miimon
= bond
->params
.miimon
;
2061 read_lock(&bond
->lock
);
2062 info
->num_slaves
= bond
->slave_cnt
;
2063 read_unlock(&bond
->lock
);
2068 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2070 struct bonding
*bond
= bond_dev
->priv
;
2071 struct slave
*slave
;
2074 if (info
->slave_id
< 0) {
2078 read_lock(&bond
->lock
);
2080 bond_for_each_slave(bond
, slave
, i
) {
2081 if (i
== (int)info
->slave_id
) {
2087 read_unlock(&bond
->lock
);
2090 strcpy(info
->slave_name
, slave
->dev
->name
);
2091 info
->link
= slave
->link
;
2092 info
->state
= slave
->state
;
2093 info
->link_failure_count
= slave
->link_failure_count
;
2101 /*-------------------------------- Monitoring -------------------------------*/
2104 * if !have_locks, return nonzero if a failover is necessary. if
2105 * have_locks, do whatever failover activities are needed.
2107 * This is to separate the inspection and failover steps for locking
2108 * purposes; failover requires rtnl, but acquiring it for every
2109 * inspection is undesirable, so a wrapper first does inspection, and
2110 * the acquires the necessary locks and calls again to perform
2111 * failover if needed. Since all locks are dropped, a complete
2112 * restart is needed between calls.
2114 static int __bond_mii_monitor(struct bonding
*bond
, int have_locks
)
2116 struct slave
*slave
, *oldcurrent
;
2117 int do_failover
= 0;
2120 if (bond
->slave_cnt
== 0)
2123 /* we will try to read the link status of each of our slaves, and
2124 * set their IFF_RUNNING flag appropriately. For each slave not
2125 * supporting MII status, we won't do anything so that a user-space
2126 * program could monitor the link itself if needed.
2129 if (bond
->send_grat_arp
) {
2130 if (bond
->curr_active_slave
&& test_bit(__LINK_STATE_LINKWATCH_PENDING
,
2131 &bond
->curr_active_slave
->dev
->state
))
2132 dprintk("Needs to send gratuitous arp but not yet\n");
2134 dprintk("sending delayed gratuitous arp on on %s\n",
2135 bond
->curr_active_slave
->dev
->name
);
2136 bond_send_gratuitous_arp(bond
);
2137 bond
->send_grat_arp
= 0;
2140 read_lock(&bond
->curr_slave_lock
);
2141 oldcurrent
= bond
->curr_active_slave
;
2142 read_unlock(&bond
->curr_slave_lock
);
2144 bond_for_each_slave(bond
, slave
, i
) {
2145 struct net_device
*slave_dev
= slave
->dev
;
2147 u16 old_speed
= slave
->speed
;
2148 u8 old_duplex
= slave
->duplex
;
2150 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2152 switch (slave
->link
) {
2153 case BOND_LINK_UP
: /* the link was up */
2154 if (link_state
== BMSR_LSTATUS
) {
2161 } else { /* link going down */
2162 slave
->link
= BOND_LINK_FAIL
;
2163 slave
->delay
= bond
->params
.downdelay
;
2165 if (slave
->link_failure_count
< UINT_MAX
) {
2166 slave
->link_failure_count
++;
2169 if (bond
->params
.downdelay
) {
2170 printk(KERN_INFO DRV_NAME
2171 ": %s: link status down for %s "
2172 "interface %s, disabling it in "
2176 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2177 ? ((slave
== oldcurrent
)
2178 ? "active " : "backup ")
2182 bond
->params
.downdelay
* bond
->params
.miimon
);
2185 /* no break ! fall through the BOND_LINK_FAIL test to
2186 ensure proper action to be taken
2188 case BOND_LINK_FAIL
: /* the link has just gone down */
2189 if (link_state
!= BMSR_LSTATUS
) {
2190 /* link stays down */
2191 if (slave
->delay
<= 0) {
2195 /* link down for too long time */
2196 slave
->link
= BOND_LINK_DOWN
;
2198 /* in active/backup mode, we must
2199 * completely disable this interface
2201 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2202 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2203 bond_set_slave_inactive_flags(slave
);
2206 printk(KERN_INFO DRV_NAME
2207 ": %s: link status definitely "
2208 "down for interface %s, "
2213 /* notify ad that the link status has changed */
2214 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2215 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2218 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2219 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2220 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2223 if (slave
== oldcurrent
) {
2231 slave
->link
= BOND_LINK_UP
;
2232 slave
->jiffies
= jiffies
;
2233 printk(KERN_INFO DRV_NAME
2234 ": %s: link status up again after %d "
2235 "ms for interface %s.\n",
2237 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2241 case BOND_LINK_DOWN
: /* the link was down */
2242 if (link_state
!= BMSR_LSTATUS
) {
2243 /* the link stays down, nothing more to do */
2245 } else { /* link going up */
2246 slave
->link
= BOND_LINK_BACK
;
2247 slave
->delay
= bond
->params
.updelay
;
2249 if (bond
->params
.updelay
) {
2250 /* if updelay == 0, no need to
2251 advertise about a 0 ms delay */
2252 printk(KERN_INFO DRV_NAME
2253 ": %s: link status up for "
2254 "interface %s, enabling it "
2258 bond
->params
.updelay
* bond
->params
.miimon
);
2261 /* no break ! fall through the BOND_LINK_BACK state in
2262 case there's something to do.
2264 case BOND_LINK_BACK
: /* the link has just come back */
2265 if (link_state
!= BMSR_LSTATUS
) {
2266 /* link down again */
2267 slave
->link
= BOND_LINK_DOWN
;
2269 printk(KERN_INFO DRV_NAME
2270 ": %s: link status down again after %d "
2271 "ms for interface %s.\n",
2273 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2277 if (slave
->delay
== 0) {
2281 /* now the link has been up for long time enough */
2282 slave
->link
= BOND_LINK_UP
;
2283 slave
->jiffies
= jiffies
;
2285 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2286 /* prevent it from being the active one */
2287 slave
->state
= BOND_STATE_BACKUP
;
2288 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2289 /* make it immediately active */
2290 slave
->state
= BOND_STATE_ACTIVE
;
2291 } else if (slave
!= bond
->primary_slave
) {
2292 /* prevent it from being the active one */
2293 slave
->state
= BOND_STATE_BACKUP
;
2296 printk(KERN_INFO DRV_NAME
2297 ": %s: link status definitely "
2298 "up for interface %s.\n",
2302 /* notify ad that the link status has changed */
2303 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2304 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2307 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2308 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2309 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2312 if ((!oldcurrent
) ||
2313 (slave
== bond
->primary_slave
)) {
2322 /* Should not happen */
2323 printk(KERN_ERR DRV_NAME
2324 ": %s: Error: %s Illegal value (link=%d)\n",
2329 } /* end of switch (slave->link) */
2331 bond_update_speed_duplex(slave
);
2333 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2334 if (old_speed
!= slave
->speed
) {
2335 bond_3ad_adapter_speed_changed(slave
);
2338 if (old_duplex
!= slave
->duplex
) {
2339 bond_3ad_adapter_duplex_changed(slave
);
2348 write_lock_bh(&bond
->curr_slave_lock
);
2350 bond_select_active_slave(bond
);
2352 write_unlock_bh(&bond
->curr_slave_lock
);
2355 bond_set_carrier(bond
);
2364 * Really a wrapper that splits the mii monitor into two phases: an
2365 * inspection, then (if inspection indicates something needs to be
2366 * done) an acquisition of appropriate locks followed by another pass
2367 * to implement whatever link state changes are indicated.
2369 void bond_mii_monitor(struct work_struct
*work
)
2371 struct bonding
*bond
= container_of(work
, struct bonding
,
2373 unsigned long delay
;
2375 read_lock(&bond
->lock
);
2376 if (bond
->kill_timers
) {
2377 read_unlock(&bond
->lock
);
2380 if (__bond_mii_monitor(bond
, 0)) {
2381 read_unlock(&bond
->lock
);
2383 read_lock(&bond
->lock
);
2384 __bond_mii_monitor(bond
, 1);
2388 delay
= ((bond
->params
.miimon
* HZ
) / 1000) ? : 1;
2389 read_unlock(&bond
->lock
);
2390 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2393 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2395 struct in_device
*idev
;
2396 struct in_ifaddr
*ifa
;
2403 idev
= __in_dev_get_rcu(dev
);
2407 ifa
= idev
->ifa_list
;
2411 addr
= ifa
->ifa_local
;
2417 static int bond_has_ip(struct bonding
*bond
)
2419 struct vlan_entry
*vlan
, *vlan_next
;
2421 if (bond
->master_ip
)
2424 if (list_empty(&bond
->vlan_list
))
2427 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2436 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2438 struct vlan_entry
*vlan
, *vlan_next
;
2440 if (ip
== bond
->master_ip
)
2443 if (list_empty(&bond
->vlan_list
))
2446 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2448 if (ip
== vlan
->vlan_ip
)
2456 * We go to the (large) trouble of VLAN tagging ARP frames because
2457 * switches in VLAN mode (especially if ports are configured as
2458 * "native" to a VLAN) might not pass non-tagged frames.
2460 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2462 struct sk_buff
*skb
;
2464 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2465 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2467 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2468 NULL
, slave_dev
->dev_addr
, NULL
);
2471 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2475 skb
= vlan_put_tag(skb
, vlan_id
);
2477 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2485 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2488 __be32
*targets
= bond
->params
.arp_targets
;
2489 struct vlan_entry
*vlan
, *vlan_next
;
2490 struct net_device
*vlan_dev
;
2494 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2497 dprintk("basa: target %x\n", targets
[i
]);
2498 if (list_empty(&bond
->vlan_list
)) {
2499 dprintk("basa: empty vlan: arp_send\n");
2500 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2501 bond
->master_ip
, 0);
2506 * If VLANs are configured, we do a route lookup to
2507 * determine which VLAN interface would be used, so we
2508 * can tag the ARP with the proper VLAN tag.
2510 memset(&fl
, 0, sizeof(fl
));
2511 fl
.fl4_dst
= targets
[i
];
2512 fl
.fl4_tos
= RTO_ONLINK
;
2514 rv
= ip_route_output_key(&rt
, &fl
);
2516 if (net_ratelimit()) {
2517 printk(KERN_WARNING DRV_NAME
2518 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2519 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2525 * This target is not on a VLAN
2527 if (rt
->u
.dst
.dev
== bond
->dev
) {
2529 dprintk("basa: rtdev == bond->dev: arp_send\n");
2530 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2531 bond
->master_ip
, 0);
2536 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2538 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2539 if (vlan_dev
== rt
->u
.dst
.dev
) {
2540 vlan_id
= vlan
->vlan_id
;
2541 dprintk("basa: vlan match on %s %d\n",
2542 vlan_dev
->name
, vlan_id
);
2549 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2550 vlan
->vlan_ip
, vlan_id
);
2554 if (net_ratelimit()) {
2555 printk(KERN_WARNING DRV_NAME
2556 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2557 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2558 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2565 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2566 * for each VLAN above us.
2568 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2570 struct slave
*slave
= bond
->curr_active_slave
;
2571 struct vlan_entry
*vlan
;
2572 struct net_device
*vlan_dev
;
2574 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2575 slave
? slave
->dev
->name
: "NULL");
2579 if (bond
->master_ip
) {
2580 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2581 bond
->master_ip
, 0);
2584 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2585 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2586 if (vlan
->vlan_ip
) {
2587 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2588 vlan
->vlan_ip
, vlan
->vlan_id
);
2593 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2596 __be32
*targets
= bond
->params
.arp_targets
;
2598 targets
= bond
->params
.arp_targets
;
2599 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2600 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2601 "%u.%u.%u.%u bhti(tip) %d\n",
2602 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2603 bond_has_this_ip(bond
, tip
));
2604 if (sip
== targets
[i
]) {
2605 if (bond_has_this_ip(bond
, tip
))
2606 slave
->last_arp_rx
= jiffies
;
2612 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2615 struct slave
*slave
;
2616 struct bonding
*bond
;
2617 unsigned char *arp_ptr
;
2620 if (dev
->nd_net
!= &init_net
)
2623 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2627 read_lock(&bond
->lock
);
2629 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2630 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2631 orig_dev
? orig_dev
->name
: "NULL");
2633 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2634 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2637 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2638 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2639 (2 * dev
->addr_len
) +
2640 (2 * sizeof(u32
)))))
2644 if (arp
->ar_hln
!= dev
->addr_len
||
2645 skb
->pkt_type
== PACKET_OTHERHOST
||
2646 skb
->pkt_type
== PACKET_LOOPBACK
||
2647 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2648 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2652 arp_ptr
= (unsigned char *)(arp
+ 1);
2653 arp_ptr
+= dev
->addr_len
;
2654 memcpy(&sip
, arp_ptr
, 4);
2655 arp_ptr
+= 4 + dev
->addr_len
;
2656 memcpy(&tip
, arp_ptr
, 4);
2658 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2659 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2660 slave
->state
, bond
->params
.arp_validate
,
2661 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2664 * Backup slaves won't see the ARP reply, but do come through
2665 * here for each ARP probe (so we swap the sip/tip to validate
2666 * the probe). In a "redundant switch, common router" type of
2667 * configuration, the ARP probe will (hopefully) travel from
2668 * the active, through one switch, the router, then the other
2669 * switch before reaching the backup.
2671 if (slave
->state
== BOND_STATE_ACTIVE
)
2672 bond_validate_arp(bond
, slave
, sip
, tip
);
2674 bond_validate_arp(bond
, slave
, tip
, sip
);
2677 read_unlock(&bond
->lock
);
2680 return NET_RX_SUCCESS
;
2684 * this function is called regularly to monitor each slave's link
2685 * ensuring that traffic is being sent and received when arp monitoring
2686 * is used in load-balancing mode. if the adapter has been dormant, then an
2687 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2688 * arp monitoring in active backup mode.
2690 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2692 struct bonding
*bond
= container_of(work
, struct bonding
,
2694 struct slave
*slave
, *oldcurrent
;
2695 int do_failover
= 0;
2699 read_lock(&bond
->lock
);
2701 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2703 if (bond
->kill_timers
) {
2707 if (bond
->slave_cnt
== 0) {
2711 read_lock(&bond
->curr_slave_lock
);
2712 oldcurrent
= bond
->curr_active_slave
;
2713 read_unlock(&bond
->curr_slave_lock
);
2715 /* see if any of the previous devices are up now (i.e. they have
2716 * xmt and rcv traffic). the curr_active_slave does not come into
2717 * the picture unless it is null. also, slave->jiffies is not needed
2718 * here because we send an arp on each slave and give a slave as
2719 * long as it needs to get the tx/rx within the delta.
2720 * TODO: what about up/down delay in arp mode? it wasn't here before
2723 bond_for_each_slave(bond
, slave
, i
) {
2724 if (slave
->link
!= BOND_LINK_UP
) {
2725 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2726 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2728 slave
->link
= BOND_LINK_UP
;
2729 slave
->state
= BOND_STATE_ACTIVE
;
2731 /* primary_slave has no meaning in round-robin
2732 * mode. the window of a slave being up and
2733 * curr_active_slave being null after enslaving
2737 printk(KERN_INFO DRV_NAME
2738 ": %s: link status definitely "
2739 "up for interface %s, ",
2744 printk(KERN_INFO DRV_NAME
2745 ": %s: interface %s is now up\n",
2751 /* slave->link == BOND_LINK_UP */
2753 /* not all switches will respond to an arp request
2754 * when the source ip is 0, so don't take the link down
2755 * if we don't know our ip yet
2757 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2758 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2759 bond_has_ip(bond
))) {
2761 slave
->link
= BOND_LINK_DOWN
;
2762 slave
->state
= BOND_STATE_BACKUP
;
2764 if (slave
->link_failure_count
< UINT_MAX
) {
2765 slave
->link_failure_count
++;
2768 printk(KERN_INFO DRV_NAME
2769 ": %s: interface %s is now down.\n",
2773 if (slave
== oldcurrent
) {
2779 /* note: if switch is in round-robin mode, all links
2780 * must tx arp to ensure all links rx an arp - otherwise
2781 * links may oscillate or not come up at all; if switch is
2782 * in something like xor mode, there is nothing we can
2783 * do - all replies will be rx'ed on same link causing slaves
2784 * to be unstable during low/no traffic periods
2786 if (IS_UP(slave
->dev
)) {
2787 bond_arp_send_all(bond
, slave
);
2793 write_lock_bh(&bond
->curr_slave_lock
);
2795 bond_select_active_slave(bond
);
2797 write_unlock_bh(&bond
->curr_slave_lock
);
2803 if (bond
->params
.arp_interval
)
2804 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2806 read_unlock(&bond
->lock
);
2810 * When using arp monitoring in active-backup mode, this function is
2811 * called to determine if any backup slaves have went down or a new
2812 * current slave needs to be found.
2813 * The backup slaves never generate traffic, they are considered up by merely
2814 * receiving traffic. If the current slave goes down, each backup slave will
2815 * be given the opportunity to tx/rx an arp before being taken down - this
2816 * prevents all slaves from being taken down due to the current slave not
2817 * sending any traffic for the backups to receive. The arps are not necessarily
2818 * necessary, any tx and rx traffic will keep the current slave up. While any
2819 * rx traffic will keep the backup slaves up, the current slave is responsible
2820 * for generating traffic to keep them up regardless of any other traffic they
2821 * may have received.
2822 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2824 void bond_activebackup_arp_mon(struct work_struct
*work
)
2826 struct bonding
*bond
= container_of(work
, struct bonding
,
2828 struct slave
*slave
;
2832 read_lock(&bond
->lock
);
2834 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2836 if (bond
->kill_timers
) {
2840 if (bond
->slave_cnt
== 0) {
2844 /* determine if any slave has come up or any backup slave has
2846 * TODO: what about up/down delay in arp mode? it wasn't here before
2849 bond_for_each_slave(bond
, slave
, i
) {
2850 if (slave
->link
!= BOND_LINK_UP
) {
2851 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2854 slave
->link
= BOND_LINK_UP
;
2858 write_lock_bh(&bond
->curr_slave_lock
);
2860 if ((!bond
->curr_active_slave
) &&
2861 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2862 bond_change_active_slave(bond
, slave
);
2863 bond
->current_arp_slave
= NULL
;
2864 } else if (bond
->curr_active_slave
!= slave
) {
2865 /* this slave has just come up but we
2866 * already have a current slave; this
2867 * can also happen if bond_enslave adds
2868 * a new slave that is up while we are
2869 * searching for a new slave
2871 bond_set_slave_inactive_flags(slave
);
2872 bond
->current_arp_slave
= NULL
;
2875 bond_set_carrier(bond
);
2877 if (slave
== bond
->curr_active_slave
) {
2878 printk(KERN_INFO DRV_NAME
2879 ": %s: %s is up and now the "
2880 "active interface\n",
2883 netif_carrier_on(bond
->dev
);
2885 printk(KERN_INFO DRV_NAME
2886 ": %s: backup interface %s is "
2892 write_unlock_bh(&bond
->curr_slave_lock
);
2896 read_lock(&bond
->curr_slave_lock
);
2898 if ((slave
!= bond
->curr_active_slave
) &&
2899 (!bond
->current_arp_slave
) &&
2900 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2901 bond_has_ip(bond
))) {
2902 /* a backup slave has gone down; three times
2903 * the delta allows the current slave to be
2904 * taken out before the backup slave.
2905 * note: a non-null current_arp_slave indicates
2906 * the curr_active_slave went down and we are
2907 * searching for a new one; under this
2908 * condition we only take the curr_active_slave
2909 * down - this gives each slave a chance to
2910 * tx/rx traffic before being taken out
2913 read_unlock(&bond
->curr_slave_lock
);
2915 slave
->link
= BOND_LINK_DOWN
;
2917 if (slave
->link_failure_count
< UINT_MAX
) {
2918 slave
->link_failure_count
++;
2921 bond_set_slave_inactive_flags(slave
);
2923 printk(KERN_INFO DRV_NAME
2924 ": %s: backup interface %s is now down\n",
2928 read_unlock(&bond
->curr_slave_lock
);
2933 read_lock(&bond
->curr_slave_lock
);
2934 slave
= bond
->curr_active_slave
;
2935 read_unlock(&bond
->curr_slave_lock
);
2938 /* if we have sent traffic in the past 2*arp_intervals but
2939 * haven't xmit and rx traffic in that time interval, select
2940 * a different slave. slave->jiffies is only updated when
2941 * a slave first becomes the curr_active_slave - not necessarily
2942 * after every arp; this ensures the slave has a full 2*delta
2943 * before being taken out. if a primary is being used, check
2944 * if it is up and needs to take over as the curr_active_slave
2946 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2947 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2948 bond_has_ip(bond
))) &&
2949 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2951 slave
->link
= BOND_LINK_DOWN
;
2953 if (slave
->link_failure_count
< UINT_MAX
) {
2954 slave
->link_failure_count
++;
2957 printk(KERN_INFO DRV_NAME
2958 ": %s: link status down for active interface "
2959 "%s, disabling it\n",
2964 write_lock_bh(&bond
->curr_slave_lock
);
2966 bond_select_active_slave(bond
);
2967 slave
= bond
->curr_active_slave
;
2969 write_unlock_bh(&bond
->curr_slave_lock
);
2973 bond
->current_arp_slave
= slave
;
2976 slave
->jiffies
= jiffies
;
2978 } else if ((bond
->primary_slave
) &&
2979 (bond
->primary_slave
!= slave
) &&
2980 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2981 /* at this point, slave is the curr_active_slave */
2982 printk(KERN_INFO DRV_NAME
2983 ": %s: changing from interface %s to primary "
2987 bond
->primary_slave
->dev
->name
);
2989 /* primary is up so switch to it */
2991 write_lock_bh(&bond
->curr_slave_lock
);
2992 bond_change_active_slave(bond
, bond
->primary_slave
);
2993 write_unlock_bh(&bond
->curr_slave_lock
);
2997 slave
= bond
->primary_slave
;
2998 slave
->jiffies
= jiffies
;
3000 bond
->current_arp_slave
= NULL
;
3003 /* the current slave must tx an arp to ensure backup slaves
3006 if (slave
&& bond_has_ip(bond
)) {
3007 bond_arp_send_all(bond
, slave
);
3011 /* if we don't have a curr_active_slave, search for the next available
3012 * backup slave from the current_arp_slave and make it the candidate
3013 * for becoming the curr_active_slave
3016 if (!bond
->current_arp_slave
) {
3017 bond
->current_arp_slave
= bond
->first_slave
;
3020 if (bond
->current_arp_slave
) {
3021 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3023 /* search for next candidate */
3024 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3025 if (IS_UP(slave
->dev
)) {
3026 slave
->link
= BOND_LINK_BACK
;
3027 bond_set_slave_active_flags(slave
);
3028 bond_arp_send_all(bond
, slave
);
3029 slave
->jiffies
= jiffies
;
3030 bond
->current_arp_slave
= slave
;
3034 /* if the link state is up at this point, we
3035 * mark it down - this can happen if we have
3036 * simultaneous link failures and
3037 * reselect_active_interface doesn't make this
3038 * one the current slave so it is still marked
3039 * up when it is actually down
3041 if (slave
->link
== BOND_LINK_UP
) {
3042 slave
->link
= BOND_LINK_DOWN
;
3043 if (slave
->link_failure_count
< UINT_MAX
) {
3044 slave
->link_failure_count
++;
3047 bond_set_slave_inactive_flags(slave
);
3049 printk(KERN_INFO DRV_NAME
3050 ": %s: backup interface %s is "
3060 if (bond
->params
.arp_interval
) {
3061 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3064 read_unlock(&bond
->lock
);
3067 /*------------------------------ proc/seq_file-------------------------------*/
3069 #ifdef CONFIG_PROC_FS
3071 #define SEQ_START_TOKEN ((void *)1)
3073 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3075 struct bonding
*bond
= seq
->private;
3077 struct slave
*slave
;
3080 /* make sure the bond won't be taken away */
3081 read_lock(&dev_base_lock
);
3082 read_lock(&bond
->lock
);
3085 return SEQ_START_TOKEN
;
3088 bond_for_each_slave(bond
, slave
, i
) {
3089 if (++off
== *pos
) {
3097 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3099 struct bonding
*bond
= seq
->private;
3100 struct slave
*slave
= v
;
3103 if (v
== SEQ_START_TOKEN
) {
3104 return bond
->first_slave
;
3107 slave
= slave
->next
;
3109 return (slave
== bond
->first_slave
) ? NULL
: slave
;
3112 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
3114 struct bonding
*bond
= seq
->private;
3116 read_unlock(&bond
->lock
);
3117 read_unlock(&dev_base_lock
);
3120 static void bond_info_show_master(struct seq_file
*seq
)
3122 struct bonding
*bond
= seq
->private;
3127 read_lock(&bond
->curr_slave_lock
);
3128 curr
= bond
->curr_active_slave
;
3129 read_unlock(&bond
->curr_slave_lock
);
3131 seq_printf(seq
, "Bonding Mode: %s",
3132 bond_mode_name(bond
->params
.mode
));
3134 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
&&
3135 bond
->params
.fail_over_mac
)
3136 seq_printf(seq
, " (fail_over_mac)");
3138 seq_printf(seq
, "\n");
3140 if (bond
->params
.mode
== BOND_MODE_XOR
||
3141 bond
->params
.mode
== BOND_MODE_8023AD
) {
3142 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
3143 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
3144 bond
->params
.xmit_policy
);
3147 if (USES_PRIMARY(bond
->params
.mode
)) {
3148 seq_printf(seq
, "Primary Slave: %s\n",
3149 (bond
->primary_slave
) ?
3150 bond
->primary_slave
->dev
->name
: "None");
3152 seq_printf(seq
, "Currently Active Slave: %s\n",
3153 (curr
) ? curr
->dev
->name
: "None");
3156 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
3158 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
3159 seq_printf(seq
, "Up Delay (ms): %d\n",
3160 bond
->params
.updelay
* bond
->params
.miimon
);
3161 seq_printf(seq
, "Down Delay (ms): %d\n",
3162 bond
->params
.downdelay
* bond
->params
.miimon
);
3165 /* ARP information */
3166 if(bond
->params
.arp_interval
> 0) {
3168 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3169 bond
->params
.arp_interval
);
3171 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3173 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3174 if (!bond
->params
.arp_targets
[i
])
3177 seq_printf(seq
, ",");
3178 target
= ntohl(bond
->params
.arp_targets
[i
]);
3179 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3182 seq_printf(seq
, "\n");
3185 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3186 struct ad_info ad_info
;
3187 DECLARE_MAC_BUF(mac
);
3189 seq_puts(seq
, "\n802.3ad info\n");
3190 seq_printf(seq
, "LACP rate: %s\n",
3191 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3193 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3194 seq_printf(seq
, "bond %s has no active aggregator\n",
3197 seq_printf(seq
, "Active Aggregator Info:\n");
3199 seq_printf(seq
, "\tAggregator ID: %d\n",
3200 ad_info
.aggregator_id
);
3201 seq_printf(seq
, "\tNumber of ports: %d\n",
3203 seq_printf(seq
, "\tActor Key: %d\n",
3205 seq_printf(seq
, "\tPartner Key: %d\n",
3206 ad_info
.partner_key
);
3207 seq_printf(seq
, "\tPartner Mac Address: %s\n",
3208 print_mac(mac
, ad_info
.partner_system
));
3213 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3215 struct bonding
*bond
= seq
->private;
3216 DECLARE_MAC_BUF(mac
);
3218 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3219 seq_printf(seq
, "MII Status: %s\n",
3220 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3221 seq_printf(seq
, "Link Failure Count: %u\n",
3222 slave
->link_failure_count
);
3225 "Permanent HW addr: %s\n",
3226 print_mac(mac
, slave
->perm_hwaddr
));
3228 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3229 const struct aggregator
*agg
3230 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3233 seq_printf(seq
, "Aggregator ID: %d\n",
3234 agg
->aggregator_identifier
);
3236 seq_puts(seq
, "Aggregator ID: N/A\n");
3241 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3243 if (v
== SEQ_START_TOKEN
) {
3244 seq_printf(seq
, "%s\n", version
);
3245 bond_info_show_master(seq
);
3247 bond_info_show_slave(seq
, v
);
3253 static struct seq_operations bond_info_seq_ops
= {
3254 .start
= bond_info_seq_start
,
3255 .next
= bond_info_seq_next
,
3256 .stop
= bond_info_seq_stop
,
3257 .show
= bond_info_seq_show
,
3260 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3262 struct seq_file
*seq
;
3263 struct proc_dir_entry
*proc
;
3266 res
= seq_open(file
, &bond_info_seq_ops
);
3268 /* recover the pointer buried in proc_dir_entry data */
3269 seq
= file
->private_data
;
3271 seq
->private = proc
->data
;
3277 static const struct file_operations bond_info_fops
= {
3278 .owner
= THIS_MODULE
,
3279 .open
= bond_info_open
,
3281 .llseek
= seq_lseek
,
3282 .release
= seq_release
,
3285 static int bond_create_proc_entry(struct bonding
*bond
)
3287 struct net_device
*bond_dev
= bond
->dev
;
3289 if (bond_proc_dir
) {
3290 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3293 if (bond
->proc_entry
== NULL
) {
3294 printk(KERN_WARNING DRV_NAME
3295 ": Warning: Cannot create /proc/net/%s/%s\n",
3296 DRV_NAME
, bond_dev
->name
);
3298 bond
->proc_entry
->data
= bond
;
3299 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3300 bond
->proc_entry
->owner
= THIS_MODULE
;
3301 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3308 static void bond_remove_proc_entry(struct bonding
*bond
)
3310 if (bond_proc_dir
&& bond
->proc_entry
) {
3311 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3312 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3313 bond
->proc_entry
= NULL
;
3317 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3318 * Caller must hold rtnl_lock.
3320 static void bond_create_proc_dir(void)
3322 int len
= strlen(DRV_NAME
);
3324 for (bond_proc_dir
= init_net
.proc_net
->subdir
; bond_proc_dir
;
3325 bond_proc_dir
= bond_proc_dir
->next
) {
3326 if ((bond_proc_dir
->namelen
== len
) &&
3327 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3332 if (!bond_proc_dir
) {
3333 bond_proc_dir
= proc_mkdir(DRV_NAME
, init_net
.proc_net
);
3334 if (bond_proc_dir
) {
3335 bond_proc_dir
->owner
= THIS_MODULE
;
3337 printk(KERN_WARNING DRV_NAME
3338 ": Warning: cannot create /proc/net/%s\n",
3344 /* Destroy the bonding directory under /proc/net, if empty.
3345 * Caller must hold rtnl_lock.
3347 static void bond_destroy_proc_dir(void)
3349 struct proc_dir_entry
*de
;
3351 if (!bond_proc_dir
) {
3355 /* verify that the /proc dir is empty */
3356 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3357 /* ignore . and .. */
3358 if (*(de
->name
) != '.') {
3364 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3365 bond_proc_dir
->owner
= NULL
;
3368 remove_proc_entry(DRV_NAME
, init_net
.proc_net
);
3369 bond_proc_dir
= NULL
;
3372 #endif /* CONFIG_PROC_FS */
3374 /*-------------------------- netdev event handling --------------------------*/
3377 * Change device name
3379 static int bond_event_changename(struct bonding
*bond
)
3381 #ifdef CONFIG_PROC_FS
3382 bond_remove_proc_entry(bond
);
3383 bond_create_proc_entry(bond
);
3385 down_write(&(bonding_rwsem
));
3386 bond_destroy_sysfs_entry(bond
);
3387 bond_create_sysfs_entry(bond
);
3388 up_write(&(bonding_rwsem
));
3392 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3394 struct bonding
*event_bond
= bond_dev
->priv
;
3397 case NETDEV_CHANGENAME
:
3398 return bond_event_changename(event_bond
);
3399 case NETDEV_UNREGISTER
:
3401 * TODO: remove a bond from the list?
3411 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3413 struct net_device
*bond_dev
= slave_dev
->master
;
3414 struct bonding
*bond
= bond_dev
->priv
;
3417 case NETDEV_UNREGISTER
:
3419 if (bond
->setup_by_slave
)
3420 bond_release_and_destroy(bond_dev
, slave_dev
);
3422 bond_release(bond_dev
, slave_dev
);
3427 * TODO: is this what we get if somebody
3428 * sets up a hierarchical bond, then rmmod's
3429 * one of the slave bonding devices?
3434 * ... Or is it this?
3437 case NETDEV_CHANGEMTU
:
3439 * TODO: Should slaves be allowed to
3440 * independently alter their MTU? For
3441 * an active-backup bond, slaves need
3442 * not be the same type of device, so
3443 * MTUs may vary. For other modes,
3444 * slaves arguably should have the
3445 * same MTUs. To do this, we'd need to
3446 * take over the slave's change_mtu
3447 * function for the duration of their
3451 case NETDEV_CHANGENAME
:
3453 * TODO: handle changing the primary's name
3456 case NETDEV_FEAT_CHANGE
:
3457 bond_compute_features(bond
);
3467 * bond_netdev_event: handle netdev notifier chain events.
3469 * This function receives events for the netdev chain. The caller (an
3470 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3471 * locks for us to safely manipulate the slave devices (RTNL lock,
3474 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3476 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3478 if (event_dev
->nd_net
!= &init_net
)
3481 dprintk("event_dev: %s, event: %lx\n",
3482 (event_dev
? event_dev
->name
: "None"),
3485 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3488 if (event_dev
->flags
& IFF_MASTER
) {
3489 dprintk("IFF_MASTER\n");
3490 return bond_master_netdev_event(event
, event_dev
);
3493 if (event_dev
->flags
& IFF_SLAVE
) {
3494 dprintk("IFF_SLAVE\n");
3495 return bond_slave_netdev_event(event
, event_dev
);
3502 * bond_inetaddr_event: handle inetaddr notifier chain events.
3504 * We keep track of device IPs primarily to use as source addresses in
3505 * ARP monitor probes (rather than spewing out broadcasts all the time).
3507 * We track one IP for the main device (if it has one), plus one per VLAN.
3509 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3511 struct in_ifaddr
*ifa
= ptr
;
3512 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3513 struct bonding
*bond
, *bond_next
;
3514 struct vlan_entry
*vlan
, *vlan_next
;
3516 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3517 if (bond
->dev
== event_dev
) {
3520 bond
->master_ip
= ifa
->ifa_local
;
3523 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3530 if (list_empty(&bond
->vlan_list
))
3533 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3535 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3536 if (vlan_dev
== event_dev
) {
3539 vlan
->vlan_ip
= ifa
->ifa_local
;
3543 bond_glean_dev_ip(vlan_dev
);
3554 static struct notifier_block bond_netdev_notifier
= {
3555 .notifier_call
= bond_netdev_event
,
3558 static struct notifier_block bond_inetaddr_notifier
= {
3559 .notifier_call
= bond_inetaddr_event
,
3562 /*-------------------------- Packet type handling ---------------------------*/
3564 /* register to receive lacpdus on a bond */
3565 static void bond_register_lacpdu(struct bonding
*bond
)
3567 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3569 /* initialize packet type */
3570 pk_type
->type
= PKT_TYPE_LACPDU
;
3571 pk_type
->dev
= bond
->dev
;
3572 pk_type
->func
= bond_3ad_lacpdu_recv
;
3574 dev_add_pack(pk_type
);
3577 /* unregister to receive lacpdus on a bond */
3578 static void bond_unregister_lacpdu(struct bonding
*bond
)
3580 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3583 void bond_register_arp(struct bonding
*bond
)
3585 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3590 pt
->type
= htons(ETH_P_ARP
);
3591 pt
->dev
= bond
->dev
;
3592 pt
->func
= bond_arp_rcv
;
3596 void bond_unregister_arp(struct bonding
*bond
)
3598 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3600 dev_remove_pack(pt
);
3604 /*---------------------------- Hashing Policies -----------------------------*/
3607 * Hash for the output device based upon layer 3 and layer 4 data. If
3608 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3609 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3611 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3612 struct net_device
*bond_dev
, int count
)
3614 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3615 struct iphdr
*iph
= ip_hdr(skb
);
3616 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3619 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3620 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3621 (iph
->protocol
== IPPROTO_TCP
||
3622 iph
->protocol
== IPPROTO_UDP
)) {
3623 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3625 return (layer4_xor
^
3626 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3630 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3634 * Hash for the output device based upon layer 2 data
3636 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3637 struct net_device
*bond_dev
, int count
)
3639 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3641 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3644 /*-------------------------- Device entry points ----------------------------*/
3646 static int bond_open(struct net_device
*bond_dev
)
3648 struct bonding
*bond
= bond_dev
->priv
;
3650 bond
->kill_timers
= 0;
3652 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3653 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3654 /* bond_alb_initialize must be called before the timer
3657 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3658 /* something went wrong - fail the open operation */
3662 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3663 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3666 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3667 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3668 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3671 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3672 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3673 INIT_DELAYED_WORK(&bond
->arp_work
,
3674 bond_activebackup_arp_mon
);
3676 INIT_DELAYED_WORK(&bond
->arp_work
,
3677 bond_loadbalance_arp_mon
);
3679 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3680 if (bond
->params
.arp_validate
)
3681 bond_register_arp(bond
);
3684 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3685 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3686 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3687 /* register to receive LACPDUs */
3688 bond_register_lacpdu(bond
);
3694 static int bond_close(struct net_device
*bond_dev
)
3696 struct bonding
*bond
= bond_dev
->priv
;
3698 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3699 /* Unregister the receive of LACPDUs */
3700 bond_unregister_lacpdu(bond
);
3703 if (bond
->params
.arp_validate
)
3704 bond_unregister_arp(bond
);
3706 write_lock_bh(&bond
->lock
);
3709 /* signal timers not to re-arm */
3710 bond
->kill_timers
= 1;
3712 write_unlock_bh(&bond
->lock
);
3714 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3715 cancel_delayed_work(&bond
->mii_work
);
3718 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3719 cancel_delayed_work(&bond
->arp_work
);
3722 switch (bond
->params
.mode
) {
3723 case BOND_MODE_8023AD
:
3724 cancel_delayed_work(&bond
->ad_work
);
3728 cancel_delayed_work(&bond
->alb_work
);
3735 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3736 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3737 /* Must be called only after all
3738 * slaves have been released
3740 bond_alb_deinitialize(bond
);
3746 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3748 struct bonding
*bond
= bond_dev
->priv
;
3749 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3750 struct slave
*slave
;
3753 memset(stats
, 0, sizeof(struct net_device_stats
));
3755 read_lock_bh(&bond
->lock
);
3757 bond_for_each_slave(bond
, slave
, i
) {
3758 sstats
= slave
->dev
->get_stats(slave
->dev
);
3759 stats
->rx_packets
+= sstats
->rx_packets
;
3760 stats
->rx_bytes
+= sstats
->rx_bytes
;
3761 stats
->rx_errors
+= sstats
->rx_errors
;
3762 stats
->rx_dropped
+= sstats
->rx_dropped
;
3764 stats
->tx_packets
+= sstats
->tx_packets
;
3765 stats
->tx_bytes
+= sstats
->tx_bytes
;
3766 stats
->tx_errors
+= sstats
->tx_errors
;
3767 stats
->tx_dropped
+= sstats
->tx_dropped
;
3769 stats
->multicast
+= sstats
->multicast
;
3770 stats
->collisions
+= sstats
->collisions
;
3772 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3773 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3774 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3775 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3776 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3777 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3779 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3780 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3781 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3782 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3783 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3786 read_unlock_bh(&bond
->lock
);
3791 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3793 struct net_device
*slave_dev
= NULL
;
3794 struct ifbond k_binfo
;
3795 struct ifbond __user
*u_binfo
= NULL
;
3796 struct ifslave k_sinfo
;
3797 struct ifslave __user
*u_sinfo
= NULL
;
3798 struct mii_ioctl_data
*mii
= NULL
;
3801 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3802 bond_dev
->name
, cmd
);
3814 * We do this again just in case we were called by SIOCGMIIREG
3815 * instead of SIOCGMIIPHY.
3822 if (mii
->reg_num
== 1) {
3823 struct bonding
*bond
= bond_dev
->priv
;
3825 read_lock(&bond
->lock
);
3826 read_lock(&bond
->curr_slave_lock
);
3827 if (netif_carrier_ok(bond
->dev
)) {
3828 mii
->val_out
= BMSR_LSTATUS
;
3830 read_unlock(&bond
->curr_slave_lock
);
3831 read_unlock(&bond
->lock
);
3835 case BOND_INFO_QUERY_OLD
:
3836 case SIOCBONDINFOQUERY
:
3837 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3839 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3843 res
= bond_info_query(bond_dev
, &k_binfo
);
3845 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3851 case BOND_SLAVE_INFO_QUERY_OLD
:
3852 case SIOCBONDSLAVEINFOQUERY
:
3853 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3855 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3859 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3861 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3872 if (!capable(CAP_NET_ADMIN
)) {
3876 down_write(&(bonding_rwsem
));
3877 slave_dev
= dev_get_by_name(&init_net
, ifr
->ifr_slave
);
3879 dprintk("slave_dev=%p: \n", slave_dev
);
3884 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3886 case BOND_ENSLAVE_OLD
:
3887 case SIOCBONDENSLAVE
:
3888 res
= bond_enslave(bond_dev
, slave_dev
);
3890 case BOND_RELEASE_OLD
:
3891 case SIOCBONDRELEASE
:
3892 res
= bond_release(bond_dev
, slave_dev
);
3894 case BOND_SETHWADDR_OLD
:
3895 case SIOCBONDSETHWADDR
:
3896 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3898 case BOND_CHANGE_ACTIVE_OLD
:
3899 case SIOCBONDCHANGEACTIVE
:
3900 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3909 up_write(&(bonding_rwsem
));
3913 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3915 struct bonding
*bond
= bond_dev
->priv
;
3916 struct dev_mc_list
*dmi
;
3918 write_lock_bh(&bond
->lock
);
3921 * Do promisc before checking multicast_mode
3923 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3924 bond_set_promiscuity(bond
, 1);
3927 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3928 bond_set_promiscuity(bond
, -1);
3931 /* set allmulti flag to slaves */
3932 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3933 bond_set_allmulti(bond
, 1);
3936 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3937 bond_set_allmulti(bond
, -1);
3940 bond
->flags
= bond_dev
->flags
;
3942 /* looking for addresses to add to slaves' mc list */
3943 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3944 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3945 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3949 /* looking for addresses to delete from slaves' list */
3950 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3951 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3952 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3956 /* save master's multicast list */
3957 bond_mc_list_destroy(bond
);
3958 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3960 write_unlock_bh(&bond
->lock
);
3964 * Change the MTU of all of a master's slaves to match the master
3966 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3968 struct bonding
*bond
= bond_dev
->priv
;
3969 struct slave
*slave
, *stop_at
;
3973 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3974 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3976 /* Can't hold bond->lock with bh disabled here since
3977 * some base drivers panic. On the other hand we can't
3978 * hold bond->lock without bh disabled because we'll
3979 * deadlock. The only solution is to rely on the fact
3980 * that we're under rtnl_lock here, and the slaves
3981 * list won't change. This doesn't solve the problem
3982 * of setting the slave's MTU while it is
3983 * transmitting, but the assumption is that the base
3984 * driver can handle that.
3986 * TODO: figure out a way to safely iterate the slaves
3987 * list, but without holding a lock around the actual
3988 * call to the base driver.
3991 bond_for_each_slave(bond
, slave
, i
) {
3992 dprintk("s %p s->p %p c_m %p\n", slave
,
3993 slave
->prev
, slave
->dev
->change_mtu
);
3995 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3998 /* If we failed to set the slave's mtu to the new value
3999 * we must abort the operation even in ACTIVE_BACKUP
4000 * mode, because if we allow the backup slaves to have
4001 * different mtu values than the active slave we'll
4002 * need to change their mtu when doing a failover. That
4003 * means changing their mtu from timer context, which
4004 * is probably not a good idea.
4006 dprintk("err %d %s\n", res
, slave
->dev
->name
);
4011 bond_dev
->mtu
= new_mtu
;
4016 /* unwind from head to the slave that failed */
4018 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4021 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
4023 dprintk("unwind err %d dev %s\n", tmp_res
,
4034 * Note that many devices must be down to change the HW address, and
4035 * downing the master releases all slaves. We can make bonds full of
4036 * bonding devices to test this, however.
4038 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4040 struct bonding
*bond
= bond_dev
->priv
;
4041 struct sockaddr
*sa
= addr
, tmp_sa
;
4042 struct slave
*slave
, *stop_at
;
4046 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
4049 * If fail_over_mac is enabled, do nothing and return success.
4050 * Returning an error causes ifenslave to fail.
4052 if (bond
->params
.fail_over_mac
)
4055 if (!is_valid_ether_addr(sa
->sa_data
)) {
4056 return -EADDRNOTAVAIL
;
4059 /* Can't hold bond->lock with bh disabled here since
4060 * some base drivers panic. On the other hand we can't
4061 * hold bond->lock without bh disabled because we'll
4062 * deadlock. The only solution is to rely on the fact
4063 * that we're under rtnl_lock here, and the slaves
4064 * list won't change. This doesn't solve the problem
4065 * of setting the slave's hw address while it is
4066 * transmitting, but the assumption is that the base
4067 * driver can handle that.
4069 * TODO: figure out a way to safely iterate the slaves
4070 * list, but without holding a lock around the actual
4071 * call to the base driver.
4074 bond_for_each_slave(bond
, slave
, i
) {
4075 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
4077 if (slave
->dev
->set_mac_address
== NULL
) {
4079 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
4083 res
= dev_set_mac_address(slave
->dev
, addr
);
4085 /* TODO: consider downing the slave
4087 * User should expect communications
4088 * breakage anyway until ARP finish
4091 dprintk("err %d %s\n", res
, slave
->dev
->name
);
4097 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
4101 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4102 tmp_sa
.sa_family
= bond_dev
->type
;
4104 /* unwind from head to the slave that failed */
4106 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4109 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
4111 dprintk("unwind err %d dev %s\n", tmp_res
,
4119 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4121 struct bonding
*bond
= bond_dev
->priv
;
4122 struct slave
*slave
, *start_at
;
4123 int i
, slave_no
, res
= 1;
4125 read_lock(&bond
->lock
);
4127 if (!BOND_IS_OK(bond
)) {
4132 * Concurrent TX may collide on rr_tx_counter; we accept that
4133 * as being rare enough not to justify using an atomic op here
4135 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
4137 bond_for_each_slave(bond
, slave
, i
) {
4145 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4146 if (IS_UP(slave
->dev
) &&
4147 (slave
->link
== BOND_LINK_UP
) &&
4148 (slave
->state
== BOND_STATE_ACTIVE
)) {
4149 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4156 /* no suitable interface, frame not sent */
4159 read_unlock(&bond
->lock
);
4165 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4166 * the bond has a usable interface.
4168 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4170 struct bonding
*bond
= bond_dev
->priv
;
4173 read_lock(&bond
->lock
);
4174 read_lock(&bond
->curr_slave_lock
);
4176 if (!BOND_IS_OK(bond
)) {
4180 if (!bond
->curr_active_slave
)
4183 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4187 /* no suitable interface, frame not sent */
4190 read_unlock(&bond
->curr_slave_lock
);
4191 read_unlock(&bond
->lock
);
4196 * In bond_xmit_xor() , we determine the output device by using a pre-
4197 * determined xmit_hash_policy(), If the selected device is not enabled,
4198 * find the next active slave.
4200 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4202 struct bonding
*bond
= bond_dev
->priv
;
4203 struct slave
*slave
, *start_at
;
4208 read_lock(&bond
->lock
);
4210 if (!BOND_IS_OK(bond
)) {
4214 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4216 bond_for_each_slave(bond
, slave
, i
) {
4225 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4226 if (IS_UP(slave
->dev
) &&
4227 (slave
->link
== BOND_LINK_UP
) &&
4228 (slave
->state
== BOND_STATE_ACTIVE
)) {
4229 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4236 /* no suitable interface, frame not sent */
4239 read_unlock(&bond
->lock
);
4244 * in broadcast mode, we send everything to all usable interfaces.
4246 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4248 struct bonding
*bond
= bond_dev
->priv
;
4249 struct slave
*slave
, *start_at
;
4250 struct net_device
*tx_dev
= NULL
;
4254 read_lock(&bond
->lock
);
4256 if (!BOND_IS_OK(bond
)) {
4260 read_lock(&bond
->curr_slave_lock
);
4261 start_at
= bond
->curr_active_slave
;
4262 read_unlock(&bond
->curr_slave_lock
);
4268 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4269 if (IS_UP(slave
->dev
) &&
4270 (slave
->link
== BOND_LINK_UP
) &&
4271 (slave
->state
== BOND_STATE_ACTIVE
)) {
4273 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4275 printk(KERN_ERR DRV_NAME
4276 ": %s: Error: bond_xmit_broadcast(): "
4277 "skb_clone() failed\n",
4282 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4284 dev_kfree_skb(skb2
);
4288 tx_dev
= slave
->dev
;
4293 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4298 /* no suitable interface, frame not sent */
4301 /* frame sent to all suitable interfaces */
4302 read_unlock(&bond
->lock
);
4306 /*------------------------- Device initialization ---------------------------*/
4309 * set bond mode specific net device operations
4311 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4313 struct net_device
*bond_dev
= bond
->dev
;
4316 case BOND_MODE_ROUNDROBIN
:
4317 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4319 case BOND_MODE_ACTIVEBACKUP
:
4320 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4323 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4324 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4325 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4327 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4329 case BOND_MODE_BROADCAST
:
4330 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4332 case BOND_MODE_8023AD
:
4333 bond_set_master_3ad_flags(bond
);
4334 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4335 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4336 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4338 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4341 bond_set_master_alb_flags(bond
);
4344 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4345 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4348 /* Should never happen, mode already checked */
4349 printk(KERN_ERR DRV_NAME
4350 ": %s: Error: Unknown bonding mode %d\n",
4357 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4358 struct ethtool_drvinfo
*drvinfo
)
4360 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4361 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4362 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4365 static const struct ethtool_ops bond_ethtool_ops
= {
4366 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4370 * Does not allocate but creates a /proc entry.
4373 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4375 struct bonding
*bond
= bond_dev
->priv
;
4377 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4379 /* initialize rwlocks */
4380 rwlock_init(&bond
->lock
);
4381 rwlock_init(&bond
->curr_slave_lock
);
4383 bond
->params
= *params
; /* copy params struct */
4385 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4389 /* Initialize pointers */
4390 bond
->first_slave
= NULL
;
4391 bond
->curr_active_slave
= NULL
;
4392 bond
->current_arp_slave
= NULL
;
4393 bond
->primary_slave
= NULL
;
4394 bond
->dev
= bond_dev
;
4395 bond
->send_grat_arp
= 0;
4396 bond
->setup_by_slave
= 0;
4397 INIT_LIST_HEAD(&bond
->vlan_list
);
4399 /* Initialize the device entry points */
4400 bond_dev
->open
= bond_open
;
4401 bond_dev
->stop
= bond_close
;
4402 bond_dev
->get_stats
= bond_get_stats
;
4403 bond_dev
->do_ioctl
= bond_do_ioctl
;
4404 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4405 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4406 bond_dev
->change_mtu
= bond_change_mtu
;
4407 bond_dev
->set_mac_address
= bond_set_mac_address
;
4409 bond_set_mode_ops(bond
, bond
->params
.mode
);
4411 bond_dev
->destructor
= free_netdev
;
4413 /* Initialize the device options */
4414 bond_dev
->tx_queue_len
= 0;
4415 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4416 bond_dev
->priv_flags
|= IFF_BONDING
;
4418 /* At first, we block adding VLANs. That's the only way to
4419 * prevent problems that occur when adding VLANs over an
4420 * empty bond. The block will be removed once non-challenged
4421 * slaves are enslaved.
4423 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4425 /* don't acquire bond device's netif_tx_lock when
4427 bond_dev
->features
|= NETIF_F_LLTX
;
4429 /* By default, we declare the bond to be fully
4430 * VLAN hardware accelerated capable. Special
4431 * care is taken in the various xmit functions
4432 * when there are slaves that are not hw accel
4435 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4436 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4437 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4438 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4439 NETIF_F_HW_VLAN_RX
|
4440 NETIF_F_HW_VLAN_FILTER
);
4442 #ifdef CONFIG_PROC_FS
4443 bond_create_proc_entry(bond
);
4445 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4450 /* De-initialize device specific data.
4451 * Caller must hold rtnl_lock.
4453 static void bond_deinit(struct net_device
*bond_dev
)
4455 struct bonding
*bond
= bond_dev
->priv
;
4457 list_del(&bond
->bond_list
);
4459 #ifdef CONFIG_PROC_FS
4460 bond_remove_proc_entry(bond
);
4464 /* Unregister and free all bond devices.
4465 * Caller must hold rtnl_lock.
4467 static void bond_free_all(void)
4469 struct bonding
*bond
, *nxt
;
4471 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4472 struct net_device
*bond_dev
= bond
->dev
;
4474 bond_mc_list_destroy(bond
);
4475 /* Release the bonded slaves */
4476 bond_release_all(bond_dev
);
4477 unregister_netdevice(bond_dev
);
4478 bond_deinit(bond_dev
);
4481 #ifdef CONFIG_PROC_FS
4482 bond_destroy_proc_dir();
4486 /*------------------------- Module initialization ---------------------------*/
4489 * Convert string input module parms. Accept either the
4490 * number of the mode or its string name.
4492 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4496 for (i
= 0; tbl
[i
].modename
; i
++) {
4497 if ((isdigit(*mode_arg
) &&
4498 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4499 (strncmp(mode_arg
, tbl
[i
].modename
,
4500 strlen(tbl
[i
].modename
)) == 0)) {
4508 static int bond_check_params(struct bond_params
*params
)
4510 int arp_validate_value
;
4513 * Convert string parameters.
4516 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4517 if (bond_mode
== -1) {
4518 printk(KERN_ERR DRV_NAME
4519 ": Error: Invalid bonding mode \"%s\"\n",
4520 mode
== NULL
? "NULL" : mode
);
4525 if (xmit_hash_policy
) {
4526 if ((bond_mode
!= BOND_MODE_XOR
) &&
4527 (bond_mode
!= BOND_MODE_8023AD
)) {
4528 printk(KERN_INFO DRV_NAME
4529 ": xor_mode param is irrelevant in mode %s\n",
4530 bond_mode_name(bond_mode
));
4532 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4534 if (xmit_hashtype
== -1) {
4535 printk(KERN_ERR DRV_NAME
4536 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4537 xmit_hash_policy
== NULL
? "NULL" :
4545 if (bond_mode
!= BOND_MODE_8023AD
) {
4546 printk(KERN_INFO DRV_NAME
4547 ": lacp_rate param is irrelevant in mode %s\n",
4548 bond_mode_name(bond_mode
));
4550 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4551 if (lacp_fast
== -1) {
4552 printk(KERN_ERR DRV_NAME
4553 ": Error: Invalid lacp rate \"%s\"\n",
4554 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4560 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4561 printk(KERN_WARNING DRV_NAME
4562 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4563 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4564 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4565 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4569 printk(KERN_WARNING DRV_NAME
4570 ": Warning: miimon module parameter (%d), "
4571 "not in range 0-%d, so it was reset to %d\n",
4572 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4573 miimon
= BOND_LINK_MON_INTERV
;
4577 printk(KERN_WARNING DRV_NAME
4578 ": Warning: updelay module parameter (%d), "
4579 "not in range 0-%d, so it was reset to 0\n",
4584 if (downdelay
< 0) {
4585 printk(KERN_WARNING DRV_NAME
4586 ": Warning: downdelay module parameter (%d), "
4587 "not in range 0-%d, so it was reset to 0\n",
4588 downdelay
, INT_MAX
);
4592 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4593 printk(KERN_WARNING DRV_NAME
4594 ": Warning: use_carrier module parameter (%d), "
4595 "not of valid value (0/1), so it was set to 1\n",
4600 /* reset values for 802.3ad */
4601 if (bond_mode
== BOND_MODE_8023AD
) {
4603 printk(KERN_WARNING DRV_NAME
4604 ": Warning: miimon must be specified, "
4605 "otherwise bonding will not detect link "
4606 "failure, speed and duplex which are "
4607 "essential for 802.3ad operation\n");
4608 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4613 /* reset values for TLB/ALB */
4614 if ((bond_mode
== BOND_MODE_TLB
) ||
4615 (bond_mode
== BOND_MODE_ALB
)) {
4617 printk(KERN_WARNING DRV_NAME
4618 ": Warning: miimon must be specified, "
4619 "otherwise bonding will not detect link "
4620 "failure and link speed which are essential "
4621 "for TLB/ALB load balancing\n");
4622 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4627 if (bond_mode
== BOND_MODE_ALB
) {
4628 printk(KERN_NOTICE DRV_NAME
4629 ": In ALB mode you might experience client "
4630 "disconnections upon reconnection of a link if the "
4631 "bonding module updelay parameter (%d msec) is "
4632 "incompatible with the forwarding delay time of the "
4638 if (updelay
|| downdelay
) {
4639 /* just warn the user the up/down delay will have
4640 * no effect since miimon is zero...
4642 printk(KERN_WARNING DRV_NAME
4643 ": Warning: miimon module parameter not set "
4644 "and updelay (%d) or downdelay (%d) module "
4645 "parameter is set; updelay and downdelay have "
4646 "no effect unless miimon is set\n",
4647 updelay
, downdelay
);
4650 /* don't allow arp monitoring */
4652 printk(KERN_WARNING DRV_NAME
4653 ": Warning: miimon (%d) and arp_interval (%d) "
4654 "can't be used simultaneously, disabling ARP "
4656 miimon
, arp_interval
);
4660 if ((updelay
% miimon
) != 0) {
4661 printk(KERN_WARNING DRV_NAME
4662 ": Warning: updelay (%d) is not a multiple "
4663 "of miimon (%d), updelay rounded to %d ms\n",
4664 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4669 if ((downdelay
% miimon
) != 0) {
4670 printk(KERN_WARNING DRV_NAME
4671 ": Warning: downdelay (%d) is not a multiple "
4672 "of miimon (%d), downdelay rounded to %d ms\n",
4674 (downdelay
/ miimon
) * miimon
);
4677 downdelay
/= miimon
;
4680 if (arp_interval
< 0) {
4681 printk(KERN_WARNING DRV_NAME
4682 ": Warning: arp_interval module parameter (%d) "
4683 ", not in range 0-%d, so it was reset to %d\n",
4684 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4685 arp_interval
= BOND_LINK_ARP_INTERV
;
4688 for (arp_ip_count
= 0;
4689 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4691 /* not complete check, but should be good enough to
4693 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4694 printk(KERN_WARNING DRV_NAME
4695 ": Warning: bad arp_ip_target module parameter "
4696 "(%s), ARP monitoring will not be performed\n",
4697 arp_ip_target
[arp_ip_count
]);
4700 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4701 arp_target
[arp_ip_count
] = ip
;
4705 if (arp_interval
&& !arp_ip_count
) {
4706 /* don't allow arping if no arp_ip_target given... */
4707 printk(KERN_WARNING DRV_NAME
4708 ": Warning: arp_interval module parameter (%d) "
4709 "specified without providing an arp_ip_target "
4710 "parameter, arp_interval was reset to 0\n",
4716 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4717 printk(KERN_ERR DRV_NAME
4718 ": arp_validate only supported in active-backup mode\n");
4721 if (!arp_interval
) {
4722 printk(KERN_ERR DRV_NAME
4723 ": arp_validate requires arp_interval\n");
4727 arp_validate_value
= bond_parse_parm(arp_validate
,
4729 if (arp_validate_value
== -1) {
4730 printk(KERN_ERR DRV_NAME
4731 ": Error: invalid arp_validate \"%s\"\n",
4732 arp_validate
== NULL
? "NULL" : arp_validate
);
4736 arp_validate_value
= 0;
4739 printk(KERN_INFO DRV_NAME
4740 ": MII link monitoring set to %d ms\n",
4742 } else if (arp_interval
) {
4745 printk(KERN_INFO DRV_NAME
4746 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4748 arp_validate_tbl
[arp_validate_value
].modename
,
4751 for (i
= 0; i
< arp_ip_count
; i
++)
4752 printk (" %s", arp_ip_target
[i
]);
4757 /* miimon and arp_interval not set, we need one so things
4758 * work as expected, see bonding.txt for details
4760 printk(KERN_WARNING DRV_NAME
4761 ": Warning: either miimon or arp_interval and "
4762 "arp_ip_target module parameters must be specified, "
4763 "otherwise bonding will not detect link failures! see "
4764 "bonding.txt for details.\n");
4767 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4768 /* currently, using a primary only makes sense
4769 * in active backup, TLB or ALB modes
4771 printk(KERN_WARNING DRV_NAME
4772 ": Warning: %s primary device specified but has no "
4773 "effect in %s mode\n",
4774 primary
, bond_mode_name(bond_mode
));
4778 if (fail_over_mac
&& (bond_mode
!= BOND_MODE_ACTIVEBACKUP
))
4779 printk(KERN_WARNING DRV_NAME
4780 ": Warning: fail_over_mac only affects "
4781 "active-backup mode.\n");
4783 /* fill params struct with the proper values */
4784 params
->mode
= bond_mode
;
4785 params
->xmit_policy
= xmit_hashtype
;
4786 params
->miimon
= miimon
;
4787 params
->arp_interval
= arp_interval
;
4788 params
->arp_validate
= arp_validate_value
;
4789 params
->updelay
= updelay
;
4790 params
->downdelay
= downdelay
;
4791 params
->use_carrier
= use_carrier
;
4792 params
->lacp_fast
= lacp_fast
;
4793 params
->primary
[0] = 0;
4794 params
->fail_over_mac
= fail_over_mac
;
4797 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4798 params
->primary
[IFNAMSIZ
- 1] = 0;
4801 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4806 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4808 /* Create a new bond based on the specified name and bonding parameters.
4809 * If name is NULL, obtain a suitable "bond%d" name for us.
4810 * Caller must NOT hold rtnl_lock; we need to release it here before we
4811 * set up our sysfs entries.
4813 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4815 struct net_device
*bond_dev
;
4819 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
4822 printk(KERN_ERR DRV_NAME
4823 ": %s: eek! can't alloc netdev!\n",
4830 res
= dev_alloc_name(bond_dev
, "bond%d");
4835 /* bond_init() must be called after dev_alloc_name() (for the
4836 * /proc files), but before register_netdevice(), because we
4837 * need to set function pointers.
4840 res
= bond_init(bond_dev
, params
);
4845 res
= register_netdevice(bond_dev
);
4850 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4853 *newbond
= bond_dev
->priv
;
4855 netif_carrier_off(bond_dev
);
4857 rtnl_unlock(); /* allows sysfs registration of net device */
4858 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4867 bond_deinit(bond_dev
);
4869 free_netdev(bond_dev
);
4875 static void bond_work_cancel_all(struct bonding
*bond
)
4877 write_lock_bh(&bond
->lock
);
4878 bond
->kill_timers
= 1;
4879 write_unlock_bh(&bond
->lock
);
4881 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4882 cancel_delayed_work(&bond
->mii_work
);
4884 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4885 cancel_delayed_work(&bond
->arp_work
);
4887 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4888 delayed_work_pending(&bond
->alb_work
))
4889 cancel_delayed_work(&bond
->alb_work
);
4891 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4892 delayed_work_pending(&bond
->ad_work
))
4893 cancel_delayed_work(&bond
->ad_work
);
4896 static int __init
bonding_init(void)
4900 struct bonding
*bond
, *nxt
;
4902 printk(KERN_INFO
"%s", version
);
4904 res
= bond_check_params(&bonding_defaults
);
4909 #ifdef CONFIG_PROC_FS
4910 bond_create_proc_dir();
4912 for (i
= 0; i
< max_bonds
; i
++) {
4913 res
= bond_create(NULL
, &bonding_defaults
, NULL
);
4918 res
= bond_create_sysfs();
4922 register_netdevice_notifier(&bond_netdev_notifier
);
4923 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4927 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4928 bond_work_cancel_all(bond
);
4929 destroy_workqueue(bond
->wq
);
4934 bond_destroy_sysfs();
4941 static void __exit
bonding_exit(void)
4943 unregister_netdevice_notifier(&bond_netdev_notifier
);
4944 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4948 bond_destroy_sysfs();
4952 module_init(bonding_init
);
4953 module_exit(bonding_exit
);
4954 MODULE_LICENSE("GPL");
4955 MODULE_VERSION(DRV_VERSION
);
4956 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4957 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4958 MODULE_SUPPORTED_DEVICE("most ethernet devices");