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/etherdevice.h>
64 #include <linux/skbuff.h>
66 #include <linux/rtnetlink.h>
67 #include <linux/proc_fs.h>
68 #include <linux/seq_file.h>
69 #include <linux/smp.h>
70 #include <linux/if_ether.h>
72 #include <linux/mii.h>
73 #include <linux/ethtool.h>
74 #include <linux/if_vlan.h>
75 #include <linux/if_bonding.h>
76 #include <net/route.h>
81 /*---------------------------- Module parameters ----------------------------*/
83 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
84 #define BOND_LINK_MON_INTERV 0
85 #define BOND_LINK_ARP_INTERV 0
87 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
88 static int miimon
= BOND_LINK_MON_INTERV
;
89 static int updelay
= 0;
90 static int downdelay
= 0;
91 static int use_carrier
= 1;
92 static char *mode
= NULL
;
93 static char *primary
= NULL
;
94 static char *lacp_rate
= NULL
;
95 static char *xmit_hash_policy
= NULL
;
96 static int arp_interval
= BOND_LINK_ARP_INTERV
;
97 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
98 static char *arp_validate
= NULL
;
99 struct bond_params bonding_defaults
;
101 module_param(max_bonds
, int, 0);
102 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
103 module_param(miimon
, int, 0);
104 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
105 module_param(updelay
, int, 0);
106 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
107 module_param(downdelay
, int, 0);
108 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
110 module_param(use_carrier
, int, 0);
111 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
112 "0 for off, 1 for on (default)");
113 module_param(mode
, charp
, 0);
114 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
115 "1 for active-backup, 2 for balance-xor, "
116 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
117 "6 for balance-alb");
118 module_param(primary
, charp
, 0);
119 MODULE_PARM_DESC(primary
, "Primary network device to use");
120 module_param(lacp_rate
, charp
, 0);
121 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
123 module_param(xmit_hash_policy
, charp
, 0);
124 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
125 ", 1 for layer 3+4");
126 module_param(arp_interval
, int, 0);
127 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
128 module_param_array(arp_ip_target
, charp
, NULL
, 0);
129 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
130 module_param(arp_validate
, charp
, 0);
131 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
133 /*----------------------------- Global variables ----------------------------*/
135 static const char * const version
=
136 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
138 LIST_HEAD(bond_dev_list
);
140 #ifdef CONFIG_PROC_FS
141 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
144 extern struct rw_semaphore bonding_rwsem
;
145 static u32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
146 static int arp_ip_count
= 0;
147 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
148 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
149 static int lacp_fast
= 0;
152 struct bond_parm_tbl bond_lacp_tbl
[] = {
153 { "slow", AD_LACP_SLOW
},
154 { "fast", AD_LACP_FAST
},
158 struct bond_parm_tbl bond_mode_tbl
[] = {
159 { "balance-rr", BOND_MODE_ROUNDROBIN
},
160 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
161 { "balance-xor", BOND_MODE_XOR
},
162 { "broadcast", BOND_MODE_BROADCAST
},
163 { "802.3ad", BOND_MODE_8023AD
},
164 { "balance-tlb", BOND_MODE_TLB
},
165 { "balance-alb", BOND_MODE_ALB
},
169 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
170 { "layer2", BOND_XMIT_POLICY_LAYER2
},
171 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
175 struct bond_parm_tbl arp_validate_tbl
[] = {
176 { "none", BOND_ARP_VALIDATE_NONE
},
177 { "active", BOND_ARP_VALIDATE_ACTIVE
},
178 { "backup", BOND_ARP_VALIDATE_BACKUP
},
179 { "all", BOND_ARP_VALIDATE_ALL
},
183 /*-------------------------- Forward declarations ---------------------------*/
185 static void bond_send_gratuitous_arp(struct bonding
*bond
);
187 /*---------------------------- General routines -----------------------------*/
189 const char *bond_mode_name(int mode
)
192 case BOND_MODE_ROUNDROBIN
:
193 return "load balancing (round-robin)";
194 case BOND_MODE_ACTIVEBACKUP
:
195 return "fault-tolerance (active-backup)";
197 return "load balancing (xor)";
198 case BOND_MODE_BROADCAST
:
199 return "fault-tolerance (broadcast)";
200 case BOND_MODE_8023AD
:
201 return "IEEE 802.3ad Dynamic link aggregation";
203 return "transmit load balancing";
205 return "adaptive load balancing";
211 /*---------------------------------- VLAN -----------------------------------*/
214 * bond_add_vlan - add a new vlan id on bond
215 * @bond: bond that got the notification
216 * @vlan_id: the vlan id to add
218 * Returns -ENOMEM if allocation failed.
220 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
222 struct vlan_entry
*vlan
;
224 dprintk("bond: %s, vlan id %d\n",
225 (bond
? bond
->dev
->name
: "None"), vlan_id
);
227 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
232 INIT_LIST_HEAD(&vlan
->vlan_list
);
233 vlan
->vlan_id
= vlan_id
;
236 write_lock_bh(&bond
->lock
);
238 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
240 write_unlock_bh(&bond
->lock
);
242 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
248 * bond_del_vlan - delete a vlan id from bond
249 * @bond: bond that got the notification
250 * @vlan_id: the vlan id to delete
252 * returns -ENODEV if @vlan_id was not found in @bond.
254 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
256 struct vlan_entry
*vlan
, *next
;
259 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
261 write_lock_bh(&bond
->lock
);
263 list_for_each_entry_safe(vlan
, next
, &bond
->vlan_list
, vlan_list
) {
264 if (vlan
->vlan_id
== vlan_id
) {
265 list_del(&vlan
->vlan_list
);
267 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
268 (bond
->params
.mode
== BOND_MODE_ALB
)) {
269 bond_alb_clear_vlan(bond
, vlan_id
);
272 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
277 if (list_empty(&bond
->vlan_list
) &&
278 (bond
->slave_cnt
== 0)) {
279 /* Last VLAN removed and no slaves, so
280 * restore block on adding VLANs. This will
281 * be removed once new slaves that are not
282 * VLAN challenged will be added.
284 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
292 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
296 write_unlock_bh(&bond
->lock
);
301 * bond_has_challenged_slaves
302 * @bond: the bond we're working on
304 * Searches the slave list. Returns 1 if a vlan challenged slave
305 * was found, 0 otherwise.
307 * Assumes bond->lock is held.
309 static int bond_has_challenged_slaves(struct bonding
*bond
)
314 bond_for_each_slave(bond
, slave
, i
) {
315 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
316 dprintk("found VLAN challenged slave - %s\n",
322 dprintk("no VLAN challenged slaves found\n");
327 * bond_next_vlan - safely skip to the next item in the vlans list.
328 * @bond: the bond we're working on
329 * @curr: item we're advancing from
331 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
332 * or @curr->next otherwise (even if it is @curr itself again).
334 * Caller must hold bond->lock
336 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
338 struct vlan_entry
*next
, *last
;
340 if (list_empty(&bond
->vlan_list
)) {
345 next
= list_entry(bond
->vlan_list
.next
,
346 struct vlan_entry
, vlan_list
);
348 last
= list_entry(bond
->vlan_list
.prev
,
349 struct vlan_entry
, vlan_list
);
351 next
= list_entry(bond
->vlan_list
.next
,
352 struct vlan_entry
, vlan_list
);
354 next
= list_entry(curr
->vlan_list
.next
,
355 struct vlan_entry
, vlan_list
);
363 * bond_dev_queue_xmit - Prepare skb for xmit.
365 * @bond: bond device that got this skb for tx.
366 * @skb: hw accel VLAN tagged skb to transmit
367 * @slave_dev: slave that is supposed to xmit this skbuff
369 * When the bond gets an skb to transmit that is
370 * already hardware accelerated VLAN tagged, and it
371 * needs to relay this skb to a slave that is not
372 * hw accel capable, the skb needs to be "unaccelerated",
373 * i.e. strip the hwaccel tag and re-insert it as part
376 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
378 unsigned short vlan_id
;
380 if (!list_empty(&bond
->vlan_list
) &&
381 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
382 vlan_get_tag(skb
, &vlan_id
) == 0) {
383 skb
->dev
= slave_dev
;
384 skb
= vlan_put_tag(skb
, vlan_id
);
386 /* vlan_put_tag() frees the skb in case of error,
387 * so return success here so the calling functions
388 * won't attempt to free is again.
393 skb
->dev
= slave_dev
;
403 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
404 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
406 * a. This operation is performed in IOCTL context,
407 * b. The operation is protected by the RTNL semaphore in the 8021q code,
408 * c. Holding a lock with BH disabled while directly calling a base driver
409 * entry point is generally a BAD idea.
411 * The design of synchronization/protection for this operation in the 8021q
412 * module is good for one or more VLAN devices over a single physical device
413 * and cannot be extended for a teaming solution like bonding, so there is a
414 * potential race condition here where a net device from the vlan group might
415 * be referenced (either by a base driver or the 8021q code) while it is being
416 * removed from the system. However, it turns out we're not making matters
417 * worse, and if it works for regular VLAN usage it will work here too.
421 * bond_vlan_rx_register - Propagates registration to slaves
422 * @bond_dev: bonding net device that got called
423 * @grp: vlan group being registered
425 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
427 struct bonding
*bond
= bond_dev
->priv
;
433 bond_for_each_slave(bond
, slave
, i
) {
434 struct net_device
*slave_dev
= slave
->dev
;
436 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
437 slave_dev
->vlan_rx_register
) {
438 slave_dev
->vlan_rx_register(slave_dev
, grp
);
444 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
445 * @bond_dev: bonding net device that got called
446 * @vid: vlan id being added
448 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
450 struct bonding
*bond
= bond_dev
->priv
;
454 bond_for_each_slave(bond
, slave
, i
) {
455 struct net_device
*slave_dev
= slave
->dev
;
457 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
458 slave_dev
->vlan_rx_add_vid
) {
459 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
463 res
= bond_add_vlan(bond
, vid
);
465 printk(KERN_ERR DRV_NAME
466 ": %s: Error: Failed to add vlan id %d\n",
467 bond_dev
->name
, vid
);
472 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
473 * @bond_dev: bonding net device that got called
474 * @vid: vlan id being removed
476 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
478 struct bonding
*bond
= bond_dev
->priv
;
480 struct net_device
*vlan_dev
;
483 bond_for_each_slave(bond
, slave
, i
) {
484 struct net_device
*slave_dev
= slave
->dev
;
486 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
487 slave_dev
->vlan_rx_kill_vid
) {
488 /* Save and then restore vlan_dev in the grp array,
489 * since the slave's driver might clear it.
491 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
492 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
493 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
497 res
= bond_del_vlan(bond
, vid
);
499 printk(KERN_ERR DRV_NAME
500 ": %s: Error: Failed to remove vlan id %d\n",
501 bond_dev
->name
, vid
);
505 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
507 struct vlan_entry
*vlan
;
509 write_lock_bh(&bond
->lock
);
511 if (list_empty(&bond
->vlan_list
)) {
515 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
516 slave_dev
->vlan_rx_register
) {
517 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
520 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
521 !(slave_dev
->vlan_rx_add_vid
)) {
525 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
526 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
530 write_unlock_bh(&bond
->lock
);
533 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
535 struct vlan_entry
*vlan
;
536 struct net_device
*vlan_dev
;
538 write_lock_bh(&bond
->lock
);
540 if (list_empty(&bond
->vlan_list
)) {
544 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
545 !(slave_dev
->vlan_rx_kill_vid
)) {
549 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
550 /* Save and then restore vlan_dev in the grp array,
551 * since the slave's driver might clear it.
553 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
554 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
555 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
559 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
560 slave_dev
->vlan_rx_register
) {
561 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
565 write_unlock_bh(&bond
->lock
);
568 /*------------------------------- Link status -------------------------------*/
571 * Set the carrier state for the master according to the state of its
572 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
573 * do special 802.3ad magic.
575 * Returns zero if carrier state does not change, nonzero if it does.
577 static int bond_set_carrier(struct bonding
*bond
)
582 if (bond
->slave_cnt
== 0)
585 if (bond
->params
.mode
== BOND_MODE_8023AD
)
586 return bond_3ad_set_carrier(bond
);
588 bond_for_each_slave(bond
, slave
, i
) {
589 if (slave
->link
== BOND_LINK_UP
) {
590 if (!netif_carrier_ok(bond
->dev
)) {
591 netif_carrier_on(bond
->dev
);
599 if (netif_carrier_ok(bond
->dev
)) {
600 netif_carrier_off(bond
->dev
);
607 * Get link speed and duplex from the slave's base driver
608 * using ethtool. If for some reason the call fails or the
609 * values are invalid, fake speed and duplex to 100/Full
612 static int bond_update_speed_duplex(struct slave
*slave
)
614 struct net_device
*slave_dev
= slave
->dev
;
615 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
617 struct ethtool_cmd etool
;
619 /* Fake speed and duplex */
620 slave
->speed
= SPEED_100
;
621 slave
->duplex
= DUPLEX_FULL
;
623 if (slave_dev
->ethtool_ops
) {
626 if (!slave_dev
->ethtool_ops
->get_settings
) {
630 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
638 ioctl
= slave_dev
->do_ioctl
;
639 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
640 etool
.cmd
= ETHTOOL_GSET
;
641 ifr
.ifr_data
= (char*)&etool
;
642 if (!ioctl
|| (IOCTL(slave_dev
, &ifr
, SIOCETHTOOL
) < 0)) {
647 switch (etool
.speed
) {
657 switch (etool
.duplex
) {
665 slave
->speed
= etool
.speed
;
666 slave
->duplex
= etool
.duplex
;
672 * if <dev> supports MII link status reporting, check its link status.
674 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
675 * depening upon the setting of the use_carrier parameter.
677 * Return either BMSR_LSTATUS, meaning that the link is up (or we
678 * can't tell and just pretend it is), or 0, meaning that the link is
681 * If reporting is non-zero, instead of faking link up, return -1 if
682 * both ETHTOOL and MII ioctls fail (meaning the device does not
683 * support them). If use_carrier is set, return whatever it says.
684 * It'd be nice if there was a good way to tell if a driver supports
685 * netif_carrier, but there really isn't.
687 static int bond_check_dev_link(struct bonding
*bond
, struct net_device
*slave_dev
, int reporting
)
689 static int (* ioctl
)(struct net_device
*, struct ifreq
*, int);
691 struct mii_ioctl_data
*mii
;
692 struct ethtool_value etool
;
694 if (bond
->params
.use_carrier
) {
695 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
698 ioctl
= slave_dev
->do_ioctl
;
700 /* TODO: set pointer to correct ioctl on a per team member */
701 /* bases to make this more efficient. that is, once */
702 /* we determine the correct ioctl, we will always */
703 /* call it and not the others for that team */
707 * We cannot assume that SIOCGMIIPHY will also read a
708 * register; not all network drivers (e.g., e100)
712 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
713 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
715 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
716 mii
->reg_num
= MII_BMSR
;
717 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
718 return (mii
->val_out
& BMSR_LSTATUS
);
723 /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */
724 /* for a period of time so we attempt to get link status */
725 /* from it last if the above MII ioctls fail... */
726 if (slave_dev
->ethtool_ops
) {
727 if (slave_dev
->ethtool_ops
->get_link
) {
730 link
= slave_dev
->ethtool_ops
->get_link(slave_dev
);
732 return link
? BMSR_LSTATUS
: 0;
737 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
738 etool
.cmd
= ETHTOOL_GLINK
;
739 ifr
.ifr_data
= (char*)&etool
;
740 if (IOCTL(slave_dev
, &ifr
, SIOCETHTOOL
) == 0) {
741 if (etool
.data
== 1) {
744 dprintk("SIOCETHTOOL shows link down\n");
751 * If reporting, report that either there's no dev->do_ioctl,
752 * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we
753 * cannot report link status). If not reporting, pretend
756 return (reporting
? -1 : BMSR_LSTATUS
);
759 /*----------------------------- Multicast list ------------------------------*/
762 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
764 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
766 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
767 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
771 * returns dmi entry if found, NULL otherwise
773 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
775 struct dev_mc_list
*idmi
;
777 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
778 if (bond_is_dmi_same(dmi
, idmi
)) {
787 * Push the promiscuity flag down to appropriate slaves
789 static void bond_set_promiscuity(struct bonding
*bond
, int inc
)
791 if (USES_PRIMARY(bond
->params
.mode
)) {
792 /* write lock already acquired */
793 if (bond
->curr_active_slave
) {
794 dev_set_promiscuity(bond
->curr_active_slave
->dev
, inc
);
799 bond_for_each_slave(bond
, slave
, i
) {
800 dev_set_promiscuity(slave
->dev
, inc
);
806 * Push the allmulti flag down to all slaves
808 static void bond_set_allmulti(struct bonding
*bond
, int inc
)
810 if (USES_PRIMARY(bond
->params
.mode
)) {
811 /* write lock already acquired */
812 if (bond
->curr_active_slave
) {
813 dev_set_allmulti(bond
->curr_active_slave
->dev
, inc
);
818 bond_for_each_slave(bond
, slave
, i
) {
819 dev_set_allmulti(slave
->dev
, inc
);
825 * Add a Multicast address to slaves
828 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
830 if (USES_PRIMARY(bond
->params
.mode
)) {
831 /* write lock already acquired */
832 if (bond
->curr_active_slave
) {
833 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
838 bond_for_each_slave(bond
, slave
, i
) {
839 dev_mc_add(slave
->dev
, addr
, alen
, 0);
845 * Remove a multicast address from slave
848 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
850 if (USES_PRIMARY(bond
->params
.mode
)) {
851 /* write lock already acquired */
852 if (bond
->curr_active_slave
) {
853 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
858 bond_for_each_slave(bond
, slave
, i
) {
859 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
865 * Totally destroys the mc_list in bond
867 static void bond_mc_list_destroy(struct bonding
*bond
)
869 struct dev_mc_list
*dmi
;
873 bond
->mc_list
= dmi
->next
;
880 * Copy all the Multicast addresses from src to the bonding device dst
882 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
885 struct dev_mc_list
*dmi
, *new_dmi
;
887 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
888 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
891 /* FIXME: Potential memory leak !!! */
895 new_dmi
->next
= bond
->mc_list
;
896 bond
->mc_list
= new_dmi
;
897 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
898 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
899 new_dmi
->dmi_users
= dmi
->dmi_users
;
900 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
907 * flush all members of flush->mc_list from device dev->mc_list
909 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
911 struct bonding
*bond
= bond_dev
->priv
;
912 struct dev_mc_list
*dmi
;
914 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
915 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
918 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
919 /* del lacpdu mc addr from mc list */
920 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
922 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
926 /*--------------------------- Active slave change ---------------------------*/
929 * Update the mc list and multicast-related flags for the new and
930 * old active slaves (if any) according to the multicast mode, and
931 * promiscuous flags unconditionally.
933 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
935 struct dev_mc_list
*dmi
;
937 if (!USES_PRIMARY(bond
->params
.mode
)) {
938 /* nothing to do - mc list is already up-to-date on
945 if (bond
->dev
->flags
& IFF_PROMISC
) {
946 dev_set_promiscuity(old_active
->dev
, -1);
949 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
950 dev_set_allmulti(old_active
->dev
, -1);
953 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
954 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
959 if (bond
->dev
->flags
& IFF_PROMISC
) {
960 dev_set_promiscuity(new_active
->dev
, 1);
963 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
964 dev_set_allmulti(new_active
->dev
, 1);
967 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
968 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
974 * find_best_interface - select the best available slave to be the active one
975 * @bond: our bonding struct
977 * Warning: Caller must hold curr_slave_lock for writing.
979 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
981 struct slave
*new_active
, *old_active
;
982 struct slave
*bestslave
= NULL
;
983 int mintime
= bond
->params
.updelay
;
986 new_active
= old_active
= bond
->curr_active_slave
;
988 if (!new_active
) { /* there were no active slaves left */
989 if (bond
->slave_cnt
> 0) { /* found one slave */
990 new_active
= bond
->first_slave
;
992 return NULL
; /* still no slave, return NULL */
996 /* first try the primary link; if arping, a link must tx/rx traffic
997 * before it can be considered the curr_active_slave - also, we would skip
998 * slaves between the curr_active_slave and primary_slave that may be up
1001 if ((bond
->primary_slave
) &&
1002 (!bond
->params
.arp_interval
) &&
1003 (IS_UP(bond
->primary_slave
->dev
))) {
1004 new_active
= bond
->primary_slave
;
1007 /* remember where to stop iterating over the slaves */
1008 old_active
= new_active
;
1010 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1011 if (IS_UP(new_active
->dev
)) {
1012 if (new_active
->link
== BOND_LINK_UP
) {
1014 } else if (new_active
->link
== BOND_LINK_BACK
) {
1015 /* link up, but waiting for stabilization */
1016 if (new_active
->delay
< mintime
) {
1017 mintime
= new_active
->delay
;
1018 bestslave
= new_active
;
1028 * change_active_interface - change the active slave into the specified one
1029 * @bond: our bonding struct
1030 * @new: the new slave to make the active one
1032 * Set the new slave to the bond's settings and unset them on the old
1033 * curr_active_slave.
1034 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1036 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1037 * because it is apparently the best available slave we have, even though its
1038 * updelay hasn't timed out yet.
1040 * Warning: Caller must hold curr_slave_lock for writing.
1042 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1044 struct slave
*old_active
= bond
->curr_active_slave
;
1046 if (old_active
== new_active
) {
1051 if (new_active
->link
== BOND_LINK_BACK
) {
1052 if (USES_PRIMARY(bond
->params
.mode
)) {
1053 printk(KERN_INFO DRV_NAME
1054 ": %s: making interface %s the new "
1055 "active one %d ms earlier.\n",
1056 bond
->dev
->name
, new_active
->dev
->name
,
1057 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1060 new_active
->delay
= 0;
1061 new_active
->link
= BOND_LINK_UP
;
1062 new_active
->jiffies
= jiffies
;
1064 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1065 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1068 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1069 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1070 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1073 if (USES_PRIMARY(bond
->params
.mode
)) {
1074 printk(KERN_INFO DRV_NAME
1075 ": %s: making interface %s the new "
1077 bond
->dev
->name
, new_active
->dev
->name
);
1082 if (USES_PRIMARY(bond
->params
.mode
)) {
1083 bond_mc_swap(bond
, new_active
, old_active
);
1086 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1087 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1088 bond_alb_handle_active_change(bond
, new_active
);
1090 bond_set_slave_inactive_flags(old_active
);
1092 bond_set_slave_active_flags(new_active
);
1094 bond
->curr_active_slave
= new_active
;
1097 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1099 bond_set_slave_inactive_flags(old_active
);
1103 bond_set_slave_active_flags(new_active
);
1105 bond_send_gratuitous_arp(bond
);
1110 * bond_select_active_slave - select a new active slave, if needed
1111 * @bond: our bonding struct
1113 * This functions shoud be called when one of the following occurs:
1114 * - The old curr_active_slave has been released or lost its link.
1115 * - The primary_slave has got its link back.
1116 * - A slave has got its link back and there's no old curr_active_slave.
1118 * Warning: Caller must hold curr_slave_lock for writing.
1120 void bond_select_active_slave(struct bonding
*bond
)
1122 struct slave
*best_slave
;
1125 best_slave
= bond_find_best_slave(bond
);
1126 if (best_slave
!= bond
->curr_active_slave
) {
1127 bond_change_active_slave(bond
, best_slave
);
1128 rv
= bond_set_carrier(bond
);
1132 if (netif_carrier_ok(bond
->dev
)) {
1133 printk(KERN_INFO DRV_NAME
1134 ": %s: first active interface up!\n",
1137 printk(KERN_INFO DRV_NAME
": %s: "
1138 "now running without any active interface !\n",
1144 /*--------------------------- slave list handling ---------------------------*/
1147 * This function attaches the slave to the end of list.
1149 * bond->lock held for writing by caller.
1151 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1153 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1154 new_slave
->next
= new_slave
;
1155 new_slave
->prev
= new_slave
;
1156 bond
->first_slave
= new_slave
;
1158 new_slave
->next
= bond
->first_slave
;
1159 new_slave
->prev
= bond
->first_slave
->prev
;
1160 new_slave
->next
->prev
= new_slave
;
1161 new_slave
->prev
->next
= new_slave
;
1168 * This function detaches the slave from the list.
1169 * WARNING: no check is made to verify if the slave effectively
1170 * belongs to <bond>.
1171 * Nothing is freed on return, structures are just unchained.
1172 * If any slave pointer in bond was pointing to <slave>,
1173 * it should be changed by the calling function.
1175 * bond->lock held for writing by caller.
1177 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1180 slave
->next
->prev
= slave
->prev
;
1184 slave
->prev
->next
= slave
->next
;
1187 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1188 if (bond
->slave_cnt
> 1) { /* there are more slave */
1189 bond
->first_slave
= slave
->next
;
1191 bond
->first_slave
= NULL
; /* slave was the last one */
1200 /*---------------------------------- IOCTL ----------------------------------*/
1202 int bond_sethwaddr(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1204 dprintk("bond_dev=%p\n", bond_dev
);
1205 dprintk("slave_dev=%p\n", slave_dev
);
1206 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1207 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1211 #define BOND_INTERSECT_FEATURES \
1212 (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_TSO | NETIF_F_UFO)
1215 * Compute the common dev->feature set available to all slaves. Some
1216 * feature bits are managed elsewhere, so preserve feature bits set on
1217 * master device that are not part of the examined set.
1219 static int bond_compute_features(struct bonding
*bond
)
1221 unsigned long features
= BOND_INTERSECT_FEATURES
;
1222 struct slave
*slave
;
1223 struct net_device
*bond_dev
= bond
->dev
;
1224 unsigned short max_hard_header_len
= ETH_HLEN
;
1227 bond_for_each_slave(bond
, slave
, i
) {
1228 features
&= (slave
->dev
->features
& BOND_INTERSECT_FEATURES
);
1229 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1230 max_hard_header_len
= slave
->dev
->hard_header_len
;
1233 if ((features
& NETIF_F_SG
) &&
1234 !(features
& NETIF_F_ALL_CSUM
))
1235 features
&= ~NETIF_F_SG
;
1238 * features will include NETIF_F_TSO (NETIF_F_UFO) iff all
1239 * slave devices support NETIF_F_TSO (NETIF_F_UFO), which
1240 * implies that all slaves also support scatter-gather
1241 * (NETIF_F_SG), which implies that features also includes
1242 * NETIF_F_SG. So no need to check whether we have an
1243 * illegal combination of NETIF_F_{TSO,UFO} and
1247 features
|= (bond_dev
->features
& ~BOND_INTERSECT_FEATURES
);
1248 bond_dev
->features
= features
;
1249 bond_dev
->hard_header_len
= max_hard_header_len
;
1254 /* enslave device <slave> to bond device <master> */
1255 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1257 struct bonding
*bond
= bond_dev
->priv
;
1258 struct slave
*new_slave
= NULL
;
1259 struct dev_mc_list
*dmi
;
1260 struct sockaddr addr
;
1262 int old_features
= bond_dev
->features
;
1265 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1266 slave_dev
->do_ioctl
== NULL
) {
1267 printk(KERN_WARNING DRV_NAME
1268 ": %s: Warning: no link monitoring support for %s\n",
1269 bond_dev
->name
, slave_dev
->name
);
1272 /* bond must be initialized by bond_open() before enslaving */
1273 if (!(bond_dev
->flags
& IFF_UP
)) {
1274 dprintk("Error, master_dev is not up\n");
1278 /* already enslaved */
1279 if (slave_dev
->flags
& IFF_SLAVE
) {
1280 dprintk("Error, Device was already enslaved\n");
1284 /* vlan challenged mutual exclusion */
1285 /* no need to lock since we're protected by rtnl_lock */
1286 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1287 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1288 if (!list_empty(&bond
->vlan_list
)) {
1289 printk(KERN_ERR DRV_NAME
1290 ": %s: Error: cannot enslave VLAN "
1291 "challenged slave %s on VLAN enabled "
1292 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1296 printk(KERN_WARNING DRV_NAME
1297 ": %s: Warning: enslaved VLAN challenged "
1298 "slave %s. Adding VLANs will be blocked as "
1299 "long as %s is part of bond %s\n",
1300 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1302 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1305 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1306 if (bond
->slave_cnt
== 0) {
1307 /* First slave, and it is not VLAN challenged,
1308 * so remove the block of adding VLANs over the bond.
1310 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1315 * Old ifenslave binaries are no longer supported. These can
1316 * be identified with moderate accurary by the state of the slave:
1317 * the current ifenslave will set the interface down prior to
1318 * enslaving it; the old ifenslave will not.
1320 if ((slave_dev
->flags
& IFF_UP
)) {
1321 printk(KERN_ERR DRV_NAME
": %s is up. "
1322 "This may be due to an out of date ifenslave.\n",
1325 goto err_undo_flags
;
1328 if (slave_dev
->set_mac_address
== NULL
) {
1329 printk(KERN_ERR DRV_NAME
1330 ": %s: Error: The slave device you specified does "
1331 "not support setting the MAC address. "
1332 "Your kernel likely does not support slave "
1333 "devices.\n", bond_dev
->name
);
1335 goto err_undo_flags
;
1338 if (slave_dev
->get_stats
== NULL
) {
1339 printk(KERN_NOTICE DRV_NAME
1340 ": %s: the driver for slave device %s does not provide "
1341 "get_stats function, network statistics will be "
1342 "inaccurate.\n", bond_dev
->name
, slave_dev
->name
);
1345 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1348 goto err_undo_flags
;
1351 /* save slave's original flags before calling
1352 * netdev_set_master and dev_open
1354 new_slave
->original_flags
= slave_dev
->flags
;
1357 * Save slave's original ("permanent") mac address for modes
1358 * that need it, and for restoring it upon release, and then
1359 * set it to the master's address
1361 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1364 * Set slave to master's mac address. The application already
1365 * set the master's mac address to that of the first slave
1367 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1368 addr
.sa_family
= slave_dev
->type
;
1369 res
= dev_set_mac_address(slave_dev
, &addr
);
1371 dprintk("Error %d calling set_mac_address\n", res
);
1375 /* open the slave since the application closed it */
1376 res
= dev_open(slave_dev
);
1378 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1379 goto err_restore_mac
;
1382 res
= netdev_set_master(slave_dev
, bond_dev
);
1384 dprintk("Error %d calling netdev_set_master\n", res
);
1388 new_slave
->dev
= slave_dev
;
1389 slave_dev
->priv_flags
|= IFF_BONDING
;
1391 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1392 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1393 /* bond_alb_init_slave() must be called before all other stages since
1394 * it might fail and we do not want to have to undo everything
1396 res
= bond_alb_init_slave(bond
, new_slave
);
1398 goto err_unset_master
;
1402 /* If the mode USES_PRIMARY, then the new slave gets the
1403 * master's promisc (and mc) settings only if it becomes the
1404 * curr_active_slave, and that is taken care of later when calling
1405 * bond_change_active()
1407 if (!USES_PRIMARY(bond
->params
.mode
)) {
1408 /* set promiscuity level to new slave */
1409 if (bond_dev
->flags
& IFF_PROMISC
) {
1410 dev_set_promiscuity(slave_dev
, 1);
1413 /* set allmulti level to new slave */
1414 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1415 dev_set_allmulti(slave_dev
, 1);
1418 /* upload master's mc_list to new slave */
1419 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1420 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1424 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1425 /* add lacpdu mc addr to mc list */
1426 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1428 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1431 bond_add_vlans_on_slave(bond
, slave_dev
);
1433 write_lock_bh(&bond
->lock
);
1435 bond_attach_slave(bond
, new_slave
);
1437 new_slave
->delay
= 0;
1438 new_slave
->link_failure_count
= 0;
1440 bond_compute_features(bond
);
1442 new_slave
->last_arp_rx
= jiffies
;
1444 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1445 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1447 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1449 * miimon is set but a bonded network driver
1450 * does not support ETHTOOL/MII and
1451 * arp_interval is not set. Note: if
1452 * use_carrier is enabled, we will never go
1453 * here (because netif_carrier is always
1454 * supported); thus, we don't need to change
1455 * the messages for netif_carrier.
1457 printk(KERN_WARNING DRV_NAME
1458 ": %s: Warning: MII and ETHTOOL support not "
1459 "available for interface %s, and "
1460 "arp_interval/arp_ip_target module parameters "
1461 "not specified, thus bonding will not detect "
1462 "link failures! see bonding.txt for details.\n",
1463 bond_dev
->name
, slave_dev
->name
);
1464 } else if (link_reporting
== -1) {
1465 /* unable get link status using mii/ethtool */
1466 printk(KERN_WARNING DRV_NAME
1467 ": %s: Warning: can't get link status from "
1468 "interface %s; the network driver associated "
1469 "with this interface does not support MII or "
1470 "ETHTOOL link status reporting, thus miimon "
1471 "has no effect on this interface.\n",
1472 bond_dev
->name
, slave_dev
->name
);
1476 /* check for initial state */
1477 if (!bond
->params
.miimon
||
1478 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1479 if (bond
->params
.updelay
) {
1480 dprintk("Initial state of slave_dev is "
1481 "BOND_LINK_BACK\n");
1482 new_slave
->link
= BOND_LINK_BACK
;
1483 new_slave
->delay
= bond
->params
.updelay
;
1485 dprintk("Initial state of slave_dev is "
1487 new_slave
->link
= BOND_LINK_UP
;
1489 new_slave
->jiffies
= jiffies
;
1491 dprintk("Initial state of slave_dev is "
1492 "BOND_LINK_DOWN\n");
1493 new_slave
->link
= BOND_LINK_DOWN
;
1496 if (bond_update_speed_duplex(new_slave
) &&
1497 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1498 printk(KERN_WARNING DRV_NAME
1499 ": %s: Warning: failed to get speed and duplex from %s, "
1500 "assumed to be 100Mb/sec and Full.\n",
1501 bond_dev
->name
, new_slave
->dev
->name
);
1503 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1504 printk(KERN_WARNING DRV_NAME
1505 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1506 "support in base driver for proper aggregator "
1507 "selection.\n", bond_dev
->name
);
1511 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1512 /* if there is a primary slave, remember it */
1513 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1514 bond
->primary_slave
= new_slave
;
1518 switch (bond
->params
.mode
) {
1519 case BOND_MODE_ACTIVEBACKUP
:
1520 bond_set_slave_inactive_flags(new_slave
);
1521 bond_select_active_slave(bond
);
1523 case BOND_MODE_8023AD
:
1524 /* in 802.3ad mode, the internal mechanism
1525 * will activate the slaves in the selected
1528 bond_set_slave_inactive_flags(new_slave
);
1529 /* if this is the first slave */
1530 if (bond
->slave_cnt
== 1) {
1531 SLAVE_AD_INFO(new_slave
).id
= 1;
1532 /* Initialize AD with the number of times that the AD timer is called in 1 second
1533 * can be called only after the mac address of the bond is set
1535 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1536 bond
->params
.lacp_fast
);
1538 SLAVE_AD_INFO(new_slave
).id
=
1539 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1542 bond_3ad_bind_slave(new_slave
);
1546 new_slave
->state
= BOND_STATE_ACTIVE
;
1547 if ((!bond
->curr_active_slave
) &&
1548 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1549 /* first slave or no active slave yet, and this link
1550 * is OK, so make this interface the active one
1552 bond_change_active_slave(bond
, new_slave
);
1554 bond_set_slave_inactive_flags(new_slave
);
1558 dprintk("This slave is always active in trunk mode\n");
1560 /* always active in trunk mode */
1561 new_slave
->state
= BOND_STATE_ACTIVE
;
1563 /* In trunking mode there is little meaning to curr_active_slave
1564 * anyway (it holds no special properties of the bond device),
1565 * so we can change it without calling change_active_interface()
1567 if (!bond
->curr_active_slave
) {
1568 bond
->curr_active_slave
= new_slave
;
1571 } /* switch(bond_mode) */
1573 bond_set_carrier(bond
);
1575 write_unlock_bh(&bond
->lock
);
1577 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1579 goto err_unset_master
;
1581 printk(KERN_INFO DRV_NAME
1582 ": %s: enslaving %s as a%s interface with a%s link.\n",
1583 bond_dev
->name
, slave_dev
->name
,
1584 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1585 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1587 /* enslave is successful */
1590 /* Undo stages on error */
1592 netdev_set_master(slave_dev
, NULL
);
1595 dev_close(slave_dev
);
1598 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1599 addr
.sa_family
= slave_dev
->type
;
1600 dev_set_mac_address(slave_dev
, &addr
);
1606 bond_dev
->features
= old_features
;
1612 * Try to release the slave device <slave> from the bond device <master>
1613 * It is legal to access curr_active_slave without a lock because all the function
1616 * The rules for slave state should be:
1617 * for Active/Backup:
1618 * Active stays on all backups go down
1619 * for Bonded connections:
1620 * The first up interface should be left on and all others downed.
1622 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1624 struct bonding
*bond
= bond_dev
->priv
;
1625 struct slave
*slave
, *oldcurrent
;
1626 struct sockaddr addr
;
1627 int mac_addr_differ
;
1629 /* slave is not a slave or master is not master of this slave */
1630 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1631 (slave_dev
->master
!= bond_dev
)) {
1632 printk(KERN_ERR DRV_NAME
1633 ": %s: Error: cannot release %s.\n",
1634 bond_dev
->name
, slave_dev
->name
);
1638 write_lock_bh(&bond
->lock
);
1640 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1642 /* not a slave of this bond */
1643 printk(KERN_INFO DRV_NAME
1644 ": %s: %s not enslaved\n",
1645 bond_dev
->name
, slave_dev
->name
);
1646 write_unlock_bh(&bond
->lock
);
1650 mac_addr_differ
= memcmp(bond_dev
->dev_addr
,
1653 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1)) {
1654 printk(KERN_WARNING DRV_NAME
1655 ": %s: Warning: the permanent HWaddr of %s "
1656 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1657 "still in use by %s. Set the HWaddr of "
1658 "%s to a different address to avoid "
1662 slave
->perm_hwaddr
[0],
1663 slave
->perm_hwaddr
[1],
1664 slave
->perm_hwaddr
[2],
1665 slave
->perm_hwaddr
[3],
1666 slave
->perm_hwaddr
[4],
1667 slave
->perm_hwaddr
[5],
1672 /* Inform AD package of unbinding of slave. */
1673 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1674 /* must be called before the slave is
1675 * detached from the list
1677 bond_3ad_unbind_slave(slave
);
1680 printk(KERN_INFO DRV_NAME
1681 ": %s: releasing %s interface %s\n",
1683 (slave
->state
== BOND_STATE_ACTIVE
)
1684 ? "active" : "backup",
1687 oldcurrent
= bond
->curr_active_slave
;
1689 bond
->current_arp_slave
= NULL
;
1691 /* release the slave from its bond */
1692 bond_detach_slave(bond
, slave
);
1694 bond_compute_features(bond
);
1696 if (bond
->primary_slave
== slave
) {
1697 bond
->primary_slave
= NULL
;
1700 if (oldcurrent
== slave
) {
1701 bond_change_active_slave(bond
, NULL
);
1704 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1705 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1706 /* Must be called only after the slave has been
1707 * detached from the list and the curr_active_slave
1708 * has been cleared (if our_slave == old_current),
1709 * but before a new active slave is selected.
1711 bond_alb_deinit_slave(bond
, slave
);
1714 if (oldcurrent
== slave
)
1715 bond_select_active_slave(bond
);
1717 if (bond
->slave_cnt
== 0) {
1718 bond_set_carrier(bond
);
1720 /* if the last slave was removed, zero the mac address
1721 * of the master so it will be set by the application
1722 * to the mac address of the first slave
1724 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1726 if (list_empty(&bond
->vlan_list
)) {
1727 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1729 printk(KERN_WARNING DRV_NAME
1730 ": %s: Warning: clearing HW address of %s while it "
1731 "still has VLANs.\n",
1732 bond_dev
->name
, bond_dev
->name
);
1733 printk(KERN_WARNING DRV_NAME
1734 ": %s: When re-adding slaves, make sure the bond's "
1735 "HW address matches its VLANs'.\n",
1738 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1739 !bond_has_challenged_slaves(bond
)) {
1740 printk(KERN_INFO DRV_NAME
1741 ": %s: last VLAN challenged slave %s "
1742 "left bond %s. VLAN blocking is removed\n",
1743 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1744 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1747 write_unlock_bh(&bond
->lock
);
1749 /* must do this from outside any spinlocks */
1750 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1752 bond_del_vlans_from_slave(bond
, slave_dev
);
1754 /* If the mode USES_PRIMARY, then we should only remove its
1755 * promisc and mc settings if it was the curr_active_slave, but that was
1756 * already taken care of above when we detached the slave
1758 if (!USES_PRIMARY(bond
->params
.mode
)) {
1759 /* unset promiscuity level from slave */
1760 if (bond_dev
->flags
& IFF_PROMISC
) {
1761 dev_set_promiscuity(slave_dev
, -1);
1764 /* unset allmulti level from slave */
1765 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1766 dev_set_allmulti(slave_dev
, -1);
1769 /* flush master's mc_list from slave */
1770 bond_mc_list_flush(bond_dev
, slave_dev
);
1773 netdev_set_master(slave_dev
, NULL
);
1775 /* close slave before restoring its mac address */
1776 dev_close(slave_dev
);
1778 /* restore original ("permanent") mac address */
1779 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1780 addr
.sa_family
= slave_dev
->type
;
1781 dev_set_mac_address(slave_dev
, &addr
);
1783 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1784 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1789 return 0; /* deletion OK */
1793 * This function releases all slaves.
1795 static int bond_release_all(struct net_device
*bond_dev
)
1797 struct bonding
*bond
= bond_dev
->priv
;
1798 struct slave
*slave
;
1799 struct net_device
*slave_dev
;
1800 struct sockaddr addr
;
1802 write_lock_bh(&bond
->lock
);
1804 netif_carrier_off(bond_dev
);
1806 if (bond
->slave_cnt
== 0) {
1810 bond
->current_arp_slave
= NULL
;
1811 bond
->primary_slave
= NULL
;
1812 bond_change_active_slave(bond
, NULL
);
1814 while ((slave
= bond
->first_slave
) != NULL
) {
1815 /* Inform AD package of unbinding of slave
1816 * before slave is detached from the list.
1818 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1819 bond_3ad_unbind_slave(slave
);
1822 slave_dev
= slave
->dev
;
1823 bond_detach_slave(bond
, slave
);
1825 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1826 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1827 /* must be called only after the slave
1828 * has been detached from the list
1830 bond_alb_deinit_slave(bond
, slave
);
1833 bond_compute_features(bond
);
1835 /* now that the slave is detached, unlock and perform
1836 * all the undo steps that should not be called from
1839 write_unlock_bh(&bond
->lock
);
1841 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1842 bond_del_vlans_from_slave(bond
, slave_dev
);
1844 /* If the mode USES_PRIMARY, then we should only remove its
1845 * promisc and mc settings if it was the curr_active_slave, but that was
1846 * already taken care of above when we detached the slave
1848 if (!USES_PRIMARY(bond
->params
.mode
)) {
1849 /* unset promiscuity level from slave */
1850 if (bond_dev
->flags
& IFF_PROMISC
) {
1851 dev_set_promiscuity(slave_dev
, -1);
1854 /* unset allmulti level from slave */
1855 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1856 dev_set_allmulti(slave_dev
, -1);
1859 /* flush master's mc_list from slave */
1860 bond_mc_list_flush(bond_dev
, slave_dev
);
1863 netdev_set_master(slave_dev
, NULL
);
1865 /* close slave before restoring its mac address */
1866 dev_close(slave_dev
);
1868 /* restore original ("permanent") mac address*/
1869 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1870 addr
.sa_family
= slave_dev
->type
;
1871 dev_set_mac_address(slave_dev
, &addr
);
1873 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1874 IFF_SLAVE_INACTIVE
);
1878 /* re-acquire the lock before getting the next slave */
1879 write_lock_bh(&bond
->lock
);
1882 /* zero the mac address of the master so it will be
1883 * set by the application to the mac address of the
1886 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1888 if (list_empty(&bond
->vlan_list
)) {
1889 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1891 printk(KERN_WARNING DRV_NAME
1892 ": %s: Warning: clearing HW address of %s while it "
1893 "still has VLANs.\n",
1894 bond_dev
->name
, bond_dev
->name
);
1895 printk(KERN_WARNING DRV_NAME
1896 ": %s: When re-adding slaves, make sure the bond's "
1897 "HW address matches its VLANs'.\n",
1901 printk(KERN_INFO DRV_NAME
1902 ": %s: released all slaves\n",
1906 write_unlock_bh(&bond
->lock
);
1912 * This function changes the active slave to slave <slave_dev>.
1913 * It returns -EINVAL in the following cases.
1914 * - <slave_dev> is not found in the list.
1915 * - There is not active slave now.
1916 * - <slave_dev> is already active.
1917 * - The link state of <slave_dev> is not BOND_LINK_UP.
1918 * - <slave_dev> is not running.
1919 * In these cases, this fuction does nothing.
1920 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1922 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1924 struct bonding
*bond
= bond_dev
->priv
;
1925 struct slave
*old_active
= NULL
;
1926 struct slave
*new_active
= NULL
;
1929 if (!USES_PRIMARY(bond
->params
.mode
)) {
1933 /* Verify that master_dev is indeed the master of slave_dev */
1934 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1935 (slave_dev
->master
!= bond_dev
)) {
1939 write_lock_bh(&bond
->lock
);
1941 old_active
= bond
->curr_active_slave
;
1942 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
1945 * Changing to the current active: do nothing; return success.
1947 if (new_active
&& (new_active
== old_active
)) {
1948 write_unlock_bh(&bond
->lock
);
1954 (new_active
->link
== BOND_LINK_UP
) &&
1955 IS_UP(new_active
->dev
)) {
1956 bond_change_active_slave(bond
, new_active
);
1961 write_unlock_bh(&bond
->lock
);
1966 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
1968 struct bonding
*bond
= bond_dev
->priv
;
1970 info
->bond_mode
= bond
->params
.mode
;
1971 info
->miimon
= bond
->params
.miimon
;
1973 read_lock_bh(&bond
->lock
);
1974 info
->num_slaves
= bond
->slave_cnt
;
1975 read_unlock_bh(&bond
->lock
);
1980 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
1982 struct bonding
*bond
= bond_dev
->priv
;
1983 struct slave
*slave
;
1986 if (info
->slave_id
< 0) {
1990 read_lock_bh(&bond
->lock
);
1992 bond_for_each_slave(bond
, slave
, i
) {
1993 if (i
== (int)info
->slave_id
) {
1999 read_unlock_bh(&bond
->lock
);
2002 strcpy(info
->slave_name
, slave
->dev
->name
);
2003 info
->link
= slave
->link
;
2004 info
->state
= slave
->state
;
2005 info
->link_failure_count
= slave
->link_failure_count
;
2013 /*-------------------------------- Monitoring -------------------------------*/
2015 /* this function is called regularly to monitor each slave's link. */
2016 void bond_mii_monitor(struct net_device
*bond_dev
)
2018 struct bonding
*bond
= bond_dev
->priv
;
2019 struct slave
*slave
, *oldcurrent
;
2020 int do_failover
= 0;
2024 read_lock(&bond
->lock
);
2026 delta_in_ticks
= (bond
->params
.miimon
* HZ
) / 1000;
2028 if (bond
->kill_timers
) {
2032 if (bond
->slave_cnt
== 0) {
2036 /* we will try to read the link status of each of our slaves, and
2037 * set their IFF_RUNNING flag appropriately. For each slave not
2038 * supporting MII status, we won't do anything so that a user-space
2039 * program could monitor the link itself if needed.
2042 read_lock(&bond
->curr_slave_lock
);
2043 oldcurrent
= bond
->curr_active_slave
;
2044 read_unlock(&bond
->curr_slave_lock
);
2046 bond_for_each_slave(bond
, slave
, i
) {
2047 struct net_device
*slave_dev
= slave
->dev
;
2049 u16 old_speed
= slave
->speed
;
2050 u8 old_duplex
= slave
->duplex
;
2052 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2054 switch (slave
->link
) {
2055 case BOND_LINK_UP
: /* the link was up */
2056 if (link_state
== BMSR_LSTATUS
) {
2057 /* link stays up, nothing more to do */
2059 } else { /* link going down */
2060 slave
->link
= BOND_LINK_FAIL
;
2061 slave
->delay
= bond
->params
.downdelay
;
2063 if (slave
->link_failure_count
< UINT_MAX
) {
2064 slave
->link_failure_count
++;
2067 if (bond
->params
.downdelay
) {
2068 printk(KERN_INFO DRV_NAME
2069 ": %s: link status down for %s "
2070 "interface %s, disabling it in "
2074 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2075 ? ((slave
== oldcurrent
)
2076 ? "active " : "backup ")
2080 bond
->params
.downdelay
* bond
->params
.miimon
);
2083 /* no break ! fall through the BOND_LINK_FAIL test to
2084 ensure proper action to be taken
2086 case BOND_LINK_FAIL
: /* the link has just gone down */
2087 if (link_state
!= BMSR_LSTATUS
) {
2088 /* link stays down */
2089 if (slave
->delay
<= 0) {
2090 /* link down for too long time */
2091 slave
->link
= BOND_LINK_DOWN
;
2093 /* in active/backup mode, we must
2094 * completely disable this interface
2096 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2097 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2098 bond_set_slave_inactive_flags(slave
);
2101 printk(KERN_INFO DRV_NAME
2102 ": %s: link status definitely "
2103 "down for interface %s, "
2108 /* notify ad that the link status has changed */
2109 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2110 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2113 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2114 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2115 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2118 if (slave
== oldcurrent
) {
2126 slave
->link
= BOND_LINK_UP
;
2127 slave
->jiffies
= jiffies
;
2128 printk(KERN_INFO DRV_NAME
2129 ": %s: link status up again after %d "
2130 "ms for interface %s.\n",
2132 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2136 case BOND_LINK_DOWN
: /* the link was down */
2137 if (link_state
!= BMSR_LSTATUS
) {
2138 /* the link stays down, nothing more to do */
2140 } else { /* link going up */
2141 slave
->link
= BOND_LINK_BACK
;
2142 slave
->delay
= bond
->params
.updelay
;
2144 if (bond
->params
.updelay
) {
2145 /* if updelay == 0, no need to
2146 advertise about a 0 ms delay */
2147 printk(KERN_INFO DRV_NAME
2148 ": %s: link status up for "
2149 "interface %s, enabling it "
2153 bond
->params
.updelay
* bond
->params
.miimon
);
2156 /* no break ! fall through the BOND_LINK_BACK state in
2157 case there's something to do.
2159 case BOND_LINK_BACK
: /* the link has just come back */
2160 if (link_state
!= BMSR_LSTATUS
) {
2161 /* link down again */
2162 slave
->link
= BOND_LINK_DOWN
;
2164 printk(KERN_INFO DRV_NAME
2165 ": %s: link status down again after %d "
2166 "ms for interface %s.\n",
2168 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2172 if (slave
->delay
== 0) {
2173 /* now the link has been up for long time enough */
2174 slave
->link
= BOND_LINK_UP
;
2175 slave
->jiffies
= jiffies
;
2177 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2178 /* prevent it from being the active one */
2179 slave
->state
= BOND_STATE_BACKUP
;
2180 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2181 /* make it immediately active */
2182 slave
->state
= BOND_STATE_ACTIVE
;
2183 } else if (slave
!= bond
->primary_slave
) {
2184 /* prevent it from being the active one */
2185 slave
->state
= BOND_STATE_BACKUP
;
2188 printk(KERN_INFO DRV_NAME
2189 ": %s: link status definitely "
2190 "up for interface %s.\n",
2194 /* notify ad that the link status has changed */
2195 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2196 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2199 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2200 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2201 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2204 if ((!oldcurrent
) ||
2205 (slave
== bond
->primary_slave
)) {
2214 /* Should not happen */
2215 printk(KERN_ERR DRV_NAME
2216 ": %s: Error: %s Illegal value (link=%d)\n",
2221 } /* end of switch (slave->link) */
2223 bond_update_speed_duplex(slave
);
2225 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2226 if (old_speed
!= slave
->speed
) {
2227 bond_3ad_adapter_speed_changed(slave
);
2230 if (old_duplex
!= slave
->duplex
) {
2231 bond_3ad_adapter_duplex_changed(slave
);
2238 write_lock(&bond
->curr_slave_lock
);
2240 bond_select_active_slave(bond
);
2242 write_unlock(&bond
->curr_slave_lock
);
2244 bond_set_carrier(bond
);
2247 if (bond
->params
.miimon
) {
2248 mod_timer(&bond
->mii_timer
, jiffies
+ delta_in_ticks
);
2251 read_unlock(&bond
->lock
);
2255 static u32
bond_glean_dev_ip(struct net_device
*dev
)
2257 struct in_device
*idev
;
2258 struct in_ifaddr
*ifa
;
2265 idev
= __in_dev_get_rcu(dev
);
2269 ifa
= idev
->ifa_list
;
2273 addr
= ifa
->ifa_local
;
2279 static int bond_has_ip(struct bonding
*bond
)
2281 struct vlan_entry
*vlan
, *vlan_next
;
2283 if (bond
->master_ip
)
2286 if (list_empty(&bond
->vlan_list
))
2289 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2298 static int bond_has_this_ip(struct bonding
*bond
, u32 ip
)
2300 struct vlan_entry
*vlan
, *vlan_next
;
2302 if (ip
== bond
->master_ip
)
2305 if (list_empty(&bond
->vlan_list
))
2308 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2310 if (ip
== vlan
->vlan_ip
)
2318 * We go to the (large) trouble of VLAN tagging ARP frames because
2319 * switches in VLAN mode (especially if ports are configured as
2320 * "native" to a VLAN) might not pass non-tagged frames.
2322 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, u32 dest_ip
, u32 src_ip
, unsigned short vlan_id
)
2324 struct sk_buff
*skb
;
2326 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2327 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2329 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2330 NULL
, slave_dev
->dev_addr
, NULL
);
2333 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2337 skb
= vlan_put_tag(skb
, vlan_id
);
2339 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2347 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2350 u32
*targets
= bond
->params
.arp_targets
;
2351 struct vlan_entry
*vlan
, *vlan_next
;
2352 struct net_device
*vlan_dev
;
2356 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2359 dprintk("basa: target %x\n", targets
[i
]);
2360 if (list_empty(&bond
->vlan_list
)) {
2361 dprintk("basa: empty vlan: arp_send\n");
2362 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2363 bond
->master_ip
, 0);
2368 * If VLANs are configured, we do a route lookup to
2369 * determine which VLAN interface would be used, so we
2370 * can tag the ARP with the proper VLAN tag.
2372 memset(&fl
, 0, sizeof(fl
));
2373 fl
.fl4_dst
= targets
[i
];
2374 fl
.fl4_tos
= RTO_ONLINK
;
2376 rv
= ip_route_output_key(&rt
, &fl
);
2378 if (net_ratelimit()) {
2379 printk(KERN_WARNING DRV_NAME
2380 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2381 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2387 * This target is not on a VLAN
2389 if (rt
->u
.dst
.dev
== bond
->dev
) {
2391 dprintk("basa: rtdev == bond->dev: arp_send\n");
2392 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2393 bond
->master_ip
, 0);
2398 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
2400 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2401 if (vlan_dev
== rt
->u
.dst
.dev
) {
2402 vlan_id
= vlan
->vlan_id
;
2403 dprintk("basa: vlan match on %s %d\n",
2404 vlan_dev
->name
, vlan_id
);
2411 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2412 vlan
->vlan_ip
, vlan_id
);
2416 if (net_ratelimit()) {
2417 printk(KERN_WARNING DRV_NAME
2418 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2419 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2420 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2427 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2428 * for each VLAN above us.
2430 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2432 struct slave
*slave
= bond
->curr_active_slave
;
2433 struct vlan_entry
*vlan
;
2434 struct net_device
*vlan_dev
;
2436 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2437 slave
? slave
->dev
->name
: "NULL");
2441 if (bond
->master_ip
) {
2442 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2443 bond
->master_ip
, 0);
2446 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2447 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2448 if (vlan
->vlan_ip
) {
2449 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2450 vlan
->vlan_ip
, vlan
->vlan_id
);
2455 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, u32 sip
, u32 tip
)
2458 u32
*targets
= bond
->params
.arp_targets
;
2460 targets
= bond
->params
.arp_targets
;
2461 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2462 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2463 "%u.%u.%u.%u bhti(tip) %d\n",
2464 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2465 bond_has_this_ip(bond
, tip
));
2466 if (sip
== targets
[i
]) {
2467 if (bond_has_this_ip(bond
, tip
))
2468 slave
->last_arp_rx
= jiffies
;
2474 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2477 struct slave
*slave
;
2478 struct bonding
*bond
;
2479 unsigned char *arp_ptr
;
2482 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2486 read_lock(&bond
->lock
);
2488 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2489 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2490 orig_dev
? orig_dev
->name
: "NULL");
2492 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2493 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2496 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2497 if (!pskb_may_pull(skb
, (sizeof(struct arphdr
) +
2498 (2 * dev
->addr_len
) +
2499 (2 * sizeof(u32
)))))
2503 if (arp
->ar_hln
!= dev
->addr_len
||
2504 skb
->pkt_type
== PACKET_OTHERHOST
||
2505 skb
->pkt_type
== PACKET_LOOPBACK
||
2506 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2507 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2511 arp_ptr
= (unsigned char *)(arp
+ 1);
2512 arp_ptr
+= dev
->addr_len
;
2513 memcpy(&sip
, arp_ptr
, 4);
2514 arp_ptr
+= 4 + dev
->addr_len
;
2515 memcpy(&tip
, arp_ptr
, 4);
2517 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2518 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2519 slave
->state
, bond
->params
.arp_validate
,
2520 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2523 * Backup slaves won't see the ARP reply, but do come through
2524 * here for each ARP probe (so we swap the sip/tip to validate
2525 * the probe). In a "redundant switch, common router" type of
2526 * configuration, the ARP probe will (hopefully) travel from
2527 * the active, through one switch, the router, then the other
2528 * switch before reaching the backup.
2530 if (slave
->state
== BOND_STATE_ACTIVE
)
2531 bond_validate_arp(bond
, slave
, sip
, tip
);
2533 bond_validate_arp(bond
, slave
, tip
, sip
);
2536 read_unlock(&bond
->lock
);
2539 return NET_RX_SUCCESS
;
2543 * this function is called regularly to monitor each slave's link
2544 * ensuring that traffic is being sent and received when arp monitoring
2545 * is used in load-balancing mode. if the adapter has been dormant, then an
2546 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2547 * arp monitoring in active backup mode.
2549 void bond_loadbalance_arp_mon(struct net_device
*bond_dev
)
2551 struct bonding
*bond
= bond_dev
->priv
;
2552 struct slave
*slave
, *oldcurrent
;
2553 int do_failover
= 0;
2557 read_lock(&bond
->lock
);
2559 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2561 if (bond
->kill_timers
) {
2565 if (bond
->slave_cnt
== 0) {
2569 read_lock(&bond
->curr_slave_lock
);
2570 oldcurrent
= bond
->curr_active_slave
;
2571 read_unlock(&bond
->curr_slave_lock
);
2573 /* see if any of the previous devices are up now (i.e. they have
2574 * xmt and rcv traffic). the curr_active_slave does not come into
2575 * the picture unless it is null. also, slave->jiffies is not needed
2576 * here because we send an arp on each slave and give a slave as
2577 * long as it needs to get the tx/rx within the delta.
2578 * TODO: what about up/down delay in arp mode? it wasn't here before
2581 bond_for_each_slave(bond
, slave
, i
) {
2582 if (slave
->link
!= BOND_LINK_UP
) {
2583 if (((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
) &&
2584 ((jiffies
- slave
->dev
->last_rx
) <= delta_in_ticks
)) {
2586 slave
->link
= BOND_LINK_UP
;
2587 slave
->state
= BOND_STATE_ACTIVE
;
2589 /* primary_slave has no meaning in round-robin
2590 * mode. the window of a slave being up and
2591 * curr_active_slave being null after enslaving
2595 printk(KERN_INFO DRV_NAME
2596 ": %s: link status definitely "
2597 "up for interface %s, ",
2602 printk(KERN_INFO DRV_NAME
2603 ": %s: interface %s is now up\n",
2609 /* slave->link == BOND_LINK_UP */
2611 /* not all switches will respond to an arp request
2612 * when the source ip is 0, so don't take the link down
2613 * if we don't know our ip yet
2615 if (((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2616 (((jiffies
- slave
->dev
->last_rx
) >= (2*delta_in_ticks
)) &&
2617 bond_has_ip(bond
))) {
2619 slave
->link
= BOND_LINK_DOWN
;
2620 slave
->state
= BOND_STATE_BACKUP
;
2622 if (slave
->link_failure_count
< UINT_MAX
) {
2623 slave
->link_failure_count
++;
2626 printk(KERN_INFO DRV_NAME
2627 ": %s: interface %s is now down.\n",
2631 if (slave
== oldcurrent
) {
2637 /* note: if switch is in round-robin mode, all links
2638 * must tx arp to ensure all links rx an arp - otherwise
2639 * links may oscillate or not come up at all; if switch is
2640 * in something like xor mode, there is nothing we can
2641 * do - all replies will be rx'ed on same link causing slaves
2642 * to be unstable during low/no traffic periods
2644 if (IS_UP(slave
->dev
)) {
2645 bond_arp_send_all(bond
, slave
);
2650 write_lock(&bond
->curr_slave_lock
);
2652 bond_select_active_slave(bond
);
2654 write_unlock(&bond
->curr_slave_lock
);
2658 if (bond
->params
.arp_interval
) {
2659 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2662 read_unlock(&bond
->lock
);
2666 * When using arp monitoring in active-backup mode, this function is
2667 * called to determine if any backup slaves have went down or a new
2668 * current slave needs to be found.
2669 * The backup slaves never generate traffic, they are considered up by merely
2670 * receiving traffic. If the current slave goes down, each backup slave will
2671 * be given the opportunity to tx/rx an arp before being taken down - this
2672 * prevents all slaves from being taken down due to the current slave not
2673 * sending any traffic for the backups to receive. The arps are not necessarily
2674 * necessary, any tx and rx traffic will keep the current slave up. While any
2675 * rx traffic will keep the backup slaves up, the current slave is responsible
2676 * for generating traffic to keep them up regardless of any other traffic they
2677 * may have received.
2678 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2680 void bond_activebackup_arp_mon(struct net_device
*bond_dev
)
2682 struct bonding
*bond
= bond_dev
->priv
;
2683 struct slave
*slave
;
2687 read_lock(&bond
->lock
);
2689 delta_in_ticks
= (bond
->params
.arp_interval
* HZ
) / 1000;
2691 if (bond
->kill_timers
) {
2695 if (bond
->slave_cnt
== 0) {
2699 /* determine if any slave has come up or any backup slave has
2701 * TODO: what about up/down delay in arp mode? it wasn't here before
2704 bond_for_each_slave(bond
, slave
, i
) {
2705 if (slave
->link
!= BOND_LINK_UP
) {
2706 if ((jiffies
- slave_last_rx(bond
, slave
)) <=
2709 slave
->link
= BOND_LINK_UP
;
2711 write_lock(&bond
->curr_slave_lock
);
2713 if ((!bond
->curr_active_slave
) &&
2714 ((jiffies
- slave
->dev
->trans_start
) <= delta_in_ticks
)) {
2715 bond_change_active_slave(bond
, slave
);
2716 bond
->current_arp_slave
= NULL
;
2717 } else if (bond
->curr_active_slave
!= slave
) {
2718 /* this slave has just come up but we
2719 * already have a current slave; this
2720 * can also happen if bond_enslave adds
2721 * a new slave that is up while we are
2722 * searching for a new slave
2724 bond_set_slave_inactive_flags(slave
);
2725 bond
->current_arp_slave
= NULL
;
2728 bond_set_carrier(bond
);
2730 if (slave
== bond
->curr_active_slave
) {
2731 printk(KERN_INFO DRV_NAME
2732 ": %s: %s is up and now the "
2733 "active interface\n",
2736 netif_carrier_on(bond
->dev
);
2738 printk(KERN_INFO DRV_NAME
2739 ": %s: backup interface %s is "
2745 write_unlock(&bond
->curr_slave_lock
);
2748 read_lock(&bond
->curr_slave_lock
);
2750 if ((slave
!= bond
->curr_active_slave
) &&
2751 (!bond
->current_arp_slave
) &&
2752 (((jiffies
- slave_last_rx(bond
, slave
)) >= 3*delta_in_ticks
) &&
2753 bond_has_ip(bond
))) {
2754 /* a backup slave has gone down; three times
2755 * the delta allows the current slave to be
2756 * taken out before the backup slave.
2757 * note: a non-null current_arp_slave indicates
2758 * the curr_active_slave went down and we are
2759 * searching for a new one; under this
2760 * condition we only take the curr_active_slave
2761 * down - this gives each slave a chance to
2762 * tx/rx traffic before being taken out
2765 read_unlock(&bond
->curr_slave_lock
);
2767 slave
->link
= BOND_LINK_DOWN
;
2769 if (slave
->link_failure_count
< UINT_MAX
) {
2770 slave
->link_failure_count
++;
2773 bond_set_slave_inactive_flags(slave
);
2775 printk(KERN_INFO DRV_NAME
2776 ": %s: backup interface %s is now down\n",
2780 read_unlock(&bond
->curr_slave_lock
);
2785 read_lock(&bond
->curr_slave_lock
);
2786 slave
= bond
->curr_active_slave
;
2787 read_unlock(&bond
->curr_slave_lock
);
2790 /* if we have sent traffic in the past 2*arp_intervals but
2791 * haven't xmit and rx traffic in that time interval, select
2792 * a different slave. slave->jiffies is only updated when
2793 * a slave first becomes the curr_active_slave - not necessarily
2794 * after every arp; this ensures the slave has a full 2*delta
2795 * before being taken out. if a primary is being used, check
2796 * if it is up and needs to take over as the curr_active_slave
2798 if ((((jiffies
- slave
->dev
->trans_start
) >= (2*delta_in_ticks
)) ||
2799 (((jiffies
- slave_last_rx(bond
, slave
)) >= (2*delta_in_ticks
)) &&
2800 bond_has_ip(bond
))) &&
2801 ((jiffies
- slave
->jiffies
) >= 2*delta_in_ticks
)) {
2803 slave
->link
= BOND_LINK_DOWN
;
2805 if (slave
->link_failure_count
< UINT_MAX
) {
2806 slave
->link_failure_count
++;
2809 printk(KERN_INFO DRV_NAME
2810 ": %s: link status down for active interface "
2811 "%s, disabling it\n",
2815 write_lock(&bond
->curr_slave_lock
);
2817 bond_select_active_slave(bond
);
2818 slave
= bond
->curr_active_slave
;
2820 write_unlock(&bond
->curr_slave_lock
);
2822 bond
->current_arp_slave
= slave
;
2825 slave
->jiffies
= jiffies
;
2827 } else if ((bond
->primary_slave
) &&
2828 (bond
->primary_slave
!= slave
) &&
2829 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
2830 /* at this point, slave is the curr_active_slave */
2831 printk(KERN_INFO DRV_NAME
2832 ": %s: changing from interface %s to primary "
2836 bond
->primary_slave
->dev
->name
);
2838 /* primary is up so switch to it */
2839 write_lock(&bond
->curr_slave_lock
);
2840 bond_change_active_slave(bond
, bond
->primary_slave
);
2841 write_unlock(&bond
->curr_slave_lock
);
2843 slave
= bond
->primary_slave
;
2844 slave
->jiffies
= jiffies
;
2846 bond
->current_arp_slave
= NULL
;
2849 /* the current slave must tx an arp to ensure backup slaves
2852 if (slave
&& bond_has_ip(bond
)) {
2853 bond_arp_send_all(bond
, slave
);
2857 /* if we don't have a curr_active_slave, search for the next available
2858 * backup slave from the current_arp_slave and make it the candidate
2859 * for becoming the curr_active_slave
2862 if (!bond
->current_arp_slave
) {
2863 bond
->current_arp_slave
= bond
->first_slave
;
2866 if (bond
->current_arp_slave
) {
2867 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
2869 /* search for next candidate */
2870 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
2871 if (IS_UP(slave
->dev
)) {
2872 slave
->link
= BOND_LINK_BACK
;
2873 bond_set_slave_active_flags(slave
);
2874 bond_arp_send_all(bond
, slave
);
2875 slave
->jiffies
= jiffies
;
2876 bond
->current_arp_slave
= slave
;
2880 /* if the link state is up at this point, we
2881 * mark it down - this can happen if we have
2882 * simultaneous link failures and
2883 * reselect_active_interface doesn't make this
2884 * one the current slave so it is still marked
2885 * up when it is actually down
2887 if (slave
->link
== BOND_LINK_UP
) {
2888 slave
->link
= BOND_LINK_DOWN
;
2889 if (slave
->link_failure_count
< UINT_MAX
) {
2890 slave
->link_failure_count
++;
2893 bond_set_slave_inactive_flags(slave
);
2895 printk(KERN_INFO DRV_NAME
2896 ": %s: backup interface %s is "
2906 if (bond
->params
.arp_interval
) {
2907 mod_timer(&bond
->arp_timer
, jiffies
+ delta_in_ticks
);
2910 read_unlock(&bond
->lock
);
2913 /*------------------------------ proc/seq_file-------------------------------*/
2915 #ifdef CONFIG_PROC_FS
2917 #define SEQ_START_TOKEN ((void *)1)
2919 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
2921 struct bonding
*bond
= seq
->private;
2923 struct slave
*slave
;
2926 /* make sure the bond won't be taken away */
2927 read_lock(&dev_base_lock
);
2928 read_lock_bh(&bond
->lock
);
2931 return SEQ_START_TOKEN
;
2934 bond_for_each_slave(bond
, slave
, i
) {
2935 if (++off
== *pos
) {
2943 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
2945 struct bonding
*bond
= seq
->private;
2946 struct slave
*slave
= v
;
2949 if (v
== SEQ_START_TOKEN
) {
2950 return bond
->first_slave
;
2953 slave
= slave
->next
;
2955 return (slave
== bond
->first_slave
) ? NULL
: slave
;
2958 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
2960 struct bonding
*bond
= seq
->private;
2962 read_unlock_bh(&bond
->lock
);
2963 read_unlock(&dev_base_lock
);
2966 static void bond_info_show_master(struct seq_file
*seq
)
2968 struct bonding
*bond
= seq
->private;
2973 read_lock(&bond
->curr_slave_lock
);
2974 curr
= bond
->curr_active_slave
;
2975 read_unlock(&bond
->curr_slave_lock
);
2977 seq_printf(seq
, "Bonding Mode: %s\n",
2978 bond_mode_name(bond
->params
.mode
));
2980 if (bond
->params
.mode
== BOND_MODE_XOR
||
2981 bond
->params
.mode
== BOND_MODE_8023AD
) {
2982 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
2983 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
2984 bond
->params
.xmit_policy
);
2987 if (USES_PRIMARY(bond
->params
.mode
)) {
2988 seq_printf(seq
, "Primary Slave: %s\n",
2989 (bond
->primary_slave
) ?
2990 bond
->primary_slave
->dev
->name
: "None");
2992 seq_printf(seq
, "Currently Active Slave: %s\n",
2993 (curr
) ? curr
->dev
->name
: "None");
2996 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
2998 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
2999 seq_printf(seq
, "Up Delay (ms): %d\n",
3000 bond
->params
.updelay
* bond
->params
.miimon
);
3001 seq_printf(seq
, "Down Delay (ms): %d\n",
3002 bond
->params
.downdelay
* bond
->params
.miimon
);
3005 /* ARP information */
3006 if(bond
->params
.arp_interval
> 0) {
3008 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3009 bond
->params
.arp_interval
);
3011 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3013 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3014 if (!bond
->params
.arp_targets
[i
])
3017 seq_printf(seq
, ",");
3018 target
= ntohl(bond
->params
.arp_targets
[i
]);
3019 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3022 seq_printf(seq
, "\n");
3025 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3026 struct ad_info ad_info
;
3028 seq_puts(seq
, "\n802.3ad info\n");
3029 seq_printf(seq
, "LACP rate: %s\n",
3030 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3032 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3033 seq_printf(seq
, "bond %s has no active aggregator\n",
3036 seq_printf(seq
, "Active Aggregator Info:\n");
3038 seq_printf(seq
, "\tAggregator ID: %d\n",
3039 ad_info
.aggregator_id
);
3040 seq_printf(seq
, "\tNumber of ports: %d\n",
3042 seq_printf(seq
, "\tActor Key: %d\n",
3044 seq_printf(seq
, "\tPartner Key: %d\n",
3045 ad_info
.partner_key
);
3046 seq_printf(seq
, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
3047 ad_info
.partner_system
[0],
3048 ad_info
.partner_system
[1],
3049 ad_info
.partner_system
[2],
3050 ad_info
.partner_system
[3],
3051 ad_info
.partner_system
[4],
3052 ad_info
.partner_system
[5]);
3057 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3059 struct bonding
*bond
= seq
->private;
3061 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3062 seq_printf(seq
, "MII Status: %s\n",
3063 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3064 seq_printf(seq
, "Link Failure Count: %u\n",
3065 slave
->link_failure_count
);
3068 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
3069 slave
->perm_hwaddr
[0], slave
->perm_hwaddr
[1],
3070 slave
->perm_hwaddr
[2], slave
->perm_hwaddr
[3],
3071 slave
->perm_hwaddr
[4], slave
->perm_hwaddr
[5]);
3073 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3074 const struct aggregator
*agg
3075 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3078 seq_printf(seq
, "Aggregator ID: %d\n",
3079 agg
->aggregator_identifier
);
3081 seq_puts(seq
, "Aggregator ID: N/A\n");
3086 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3088 if (v
== SEQ_START_TOKEN
) {
3089 seq_printf(seq
, "%s\n", version
);
3090 bond_info_show_master(seq
);
3092 bond_info_show_slave(seq
, v
);
3098 static struct seq_operations bond_info_seq_ops
= {
3099 .start
= bond_info_seq_start
,
3100 .next
= bond_info_seq_next
,
3101 .stop
= bond_info_seq_stop
,
3102 .show
= bond_info_seq_show
,
3105 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3107 struct seq_file
*seq
;
3108 struct proc_dir_entry
*proc
;
3111 res
= seq_open(file
, &bond_info_seq_ops
);
3113 /* recover the pointer buried in proc_dir_entry data */
3114 seq
= file
->private_data
;
3116 seq
->private = proc
->data
;
3122 static const struct file_operations bond_info_fops
= {
3123 .owner
= THIS_MODULE
,
3124 .open
= bond_info_open
,
3126 .llseek
= seq_lseek
,
3127 .release
= seq_release
,
3130 static int bond_create_proc_entry(struct bonding
*bond
)
3132 struct net_device
*bond_dev
= bond
->dev
;
3134 if (bond_proc_dir
) {
3135 bond
->proc_entry
= create_proc_entry(bond_dev
->name
,
3138 if (bond
->proc_entry
== NULL
) {
3139 printk(KERN_WARNING DRV_NAME
3140 ": Warning: Cannot create /proc/net/%s/%s\n",
3141 DRV_NAME
, bond_dev
->name
);
3143 bond
->proc_entry
->data
= bond
;
3144 bond
->proc_entry
->proc_fops
= &bond_info_fops
;
3145 bond
->proc_entry
->owner
= THIS_MODULE
;
3146 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3153 static void bond_remove_proc_entry(struct bonding
*bond
)
3155 if (bond_proc_dir
&& bond
->proc_entry
) {
3156 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3157 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3158 bond
->proc_entry
= NULL
;
3162 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3163 * Caller must hold rtnl_lock.
3165 static void bond_create_proc_dir(void)
3167 int len
= strlen(DRV_NAME
);
3169 for (bond_proc_dir
= proc_net
->subdir
; bond_proc_dir
;
3170 bond_proc_dir
= bond_proc_dir
->next
) {
3171 if ((bond_proc_dir
->namelen
== len
) &&
3172 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3177 if (!bond_proc_dir
) {
3178 bond_proc_dir
= proc_mkdir(DRV_NAME
, proc_net
);
3179 if (bond_proc_dir
) {
3180 bond_proc_dir
->owner
= THIS_MODULE
;
3182 printk(KERN_WARNING DRV_NAME
3183 ": Warning: cannot create /proc/net/%s\n",
3189 /* Destroy the bonding directory under /proc/net, if empty.
3190 * Caller must hold rtnl_lock.
3192 static void bond_destroy_proc_dir(void)
3194 struct proc_dir_entry
*de
;
3196 if (!bond_proc_dir
) {
3200 /* verify that the /proc dir is empty */
3201 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3202 /* ignore . and .. */
3203 if (*(de
->name
) != '.') {
3209 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3210 bond_proc_dir
->owner
= NULL
;
3213 remove_proc_entry(DRV_NAME
, proc_net
);
3214 bond_proc_dir
= NULL
;
3217 #endif /* CONFIG_PROC_FS */
3219 /*-------------------------- netdev event handling --------------------------*/
3222 * Change device name
3224 static int bond_event_changename(struct bonding
*bond
)
3226 #ifdef CONFIG_PROC_FS
3227 bond_remove_proc_entry(bond
);
3228 bond_create_proc_entry(bond
);
3230 down_write(&(bonding_rwsem
));
3231 bond_destroy_sysfs_entry(bond
);
3232 bond_create_sysfs_entry(bond
);
3233 up_write(&(bonding_rwsem
));
3237 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3239 struct bonding
*event_bond
= bond_dev
->priv
;
3242 case NETDEV_CHANGENAME
:
3243 return bond_event_changename(event_bond
);
3244 case NETDEV_UNREGISTER
:
3246 * TODO: remove a bond from the list?
3256 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3258 struct net_device
*bond_dev
= slave_dev
->master
;
3259 struct bonding
*bond
= bond_dev
->priv
;
3262 case NETDEV_UNREGISTER
:
3264 bond_release(bond_dev
, slave_dev
);
3269 * TODO: is this what we get if somebody
3270 * sets up a hierarchical bond, then rmmod's
3271 * one of the slave bonding devices?
3276 * ... Or is it this?
3279 case NETDEV_CHANGEMTU
:
3281 * TODO: Should slaves be allowed to
3282 * independently alter their MTU? For
3283 * an active-backup bond, slaves need
3284 * not be the same type of device, so
3285 * MTUs may vary. For other modes,
3286 * slaves arguably should have the
3287 * same MTUs. To do this, we'd need to
3288 * take over the slave's change_mtu
3289 * function for the duration of their
3293 case NETDEV_CHANGENAME
:
3295 * TODO: handle changing the primary's name
3298 case NETDEV_FEAT_CHANGE
:
3299 bond_compute_features(bond
);
3309 * bond_netdev_event: handle netdev notifier chain events.
3311 * This function receives events for the netdev chain. The caller (an
3312 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3313 * locks for us to safely manipulate the slave devices (RTNL lock,
3316 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3318 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3320 dprintk("event_dev: %s, event: %lx\n",
3321 (event_dev
? event_dev
->name
: "None"),
3324 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3327 if (event_dev
->flags
& IFF_MASTER
) {
3328 dprintk("IFF_MASTER\n");
3329 return bond_master_netdev_event(event
, event_dev
);
3332 if (event_dev
->flags
& IFF_SLAVE
) {
3333 dprintk("IFF_SLAVE\n");
3334 return bond_slave_netdev_event(event
, event_dev
);
3341 * bond_inetaddr_event: handle inetaddr notifier chain events.
3343 * We keep track of device IPs primarily to use as source addresses in
3344 * ARP monitor probes (rather than spewing out broadcasts all the time).
3346 * We track one IP for the main device (if it has one), plus one per VLAN.
3348 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3350 struct in_ifaddr
*ifa
= ptr
;
3351 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3352 struct bonding
*bond
, *bond_next
;
3353 struct vlan_entry
*vlan
, *vlan_next
;
3355 list_for_each_entry_safe(bond
, bond_next
, &bond_dev_list
, bond_list
) {
3356 if (bond
->dev
== event_dev
) {
3359 bond
->master_ip
= ifa
->ifa_local
;
3362 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3369 if (list_empty(&bond
->vlan_list
))
3372 list_for_each_entry_safe(vlan
, vlan_next
, &bond
->vlan_list
,
3374 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3375 if (vlan_dev
== event_dev
) {
3378 vlan
->vlan_ip
= ifa
->ifa_local
;
3382 bond_glean_dev_ip(vlan_dev
);
3393 static struct notifier_block bond_netdev_notifier
= {
3394 .notifier_call
= bond_netdev_event
,
3397 static struct notifier_block bond_inetaddr_notifier
= {
3398 .notifier_call
= bond_inetaddr_event
,
3401 /*-------------------------- Packet type handling ---------------------------*/
3403 /* register to receive lacpdus on a bond */
3404 static void bond_register_lacpdu(struct bonding
*bond
)
3406 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3408 /* initialize packet type */
3409 pk_type
->type
= PKT_TYPE_LACPDU
;
3410 pk_type
->dev
= bond
->dev
;
3411 pk_type
->func
= bond_3ad_lacpdu_recv
;
3413 dev_add_pack(pk_type
);
3416 /* unregister to receive lacpdus on a bond */
3417 static void bond_unregister_lacpdu(struct bonding
*bond
)
3419 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3422 void bond_register_arp(struct bonding
*bond
)
3424 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3429 pt
->type
= htons(ETH_P_ARP
);
3430 pt
->dev
= NULL
; /*bond->dev;XXX*/
3431 pt
->func
= bond_arp_rcv
;
3435 void bond_unregister_arp(struct bonding
*bond
)
3437 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3439 dev_remove_pack(pt
);
3443 /*---------------------------- Hashing Policies -----------------------------*/
3446 * Hash for the the output device based upon layer 3 and layer 4 data. If
3447 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3448 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3450 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3451 struct net_device
*bond_dev
, int count
)
3453 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3454 struct iphdr
*iph
= skb
->nh
.iph
;
3455 u16
*layer4hdr
= (u16
*)((u32
*)iph
+ iph
->ihl
);
3458 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3459 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3460 (iph
->protocol
== IPPROTO_TCP
||
3461 iph
->protocol
== IPPROTO_UDP
)) {
3462 layer4_xor
= htons((*layer4hdr
^ *(layer4hdr
+ 1)));
3464 return (layer4_xor
^
3465 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3469 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3473 * Hash for the output device based upon layer 2 data
3475 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3476 struct net_device
*bond_dev
, int count
)
3478 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3480 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3483 /*-------------------------- Device entry points ----------------------------*/
3485 static int bond_open(struct net_device
*bond_dev
)
3487 struct bonding
*bond
= bond_dev
->priv
;
3488 struct timer_list
*mii_timer
= &bond
->mii_timer
;
3489 struct timer_list
*arp_timer
= &bond
->arp_timer
;
3491 bond
->kill_timers
= 0;
3493 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3494 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3495 struct timer_list
*alb_timer
= &(BOND_ALB_INFO(bond
).alb_timer
);
3497 /* bond_alb_initialize must be called before the timer
3500 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3501 /* something went wrong - fail the open operation */
3505 init_timer(alb_timer
);
3506 alb_timer
->expires
= jiffies
+ 1;
3507 alb_timer
->data
= (unsigned long)bond
;
3508 alb_timer
->function
= (void *)&bond_alb_monitor
;
3509 add_timer(alb_timer
);
3512 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3513 init_timer(mii_timer
);
3514 mii_timer
->expires
= jiffies
+ 1;
3515 mii_timer
->data
= (unsigned long)bond_dev
;
3516 mii_timer
->function
= (void *)&bond_mii_monitor
;
3517 add_timer(mii_timer
);
3520 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3521 init_timer(arp_timer
);
3522 arp_timer
->expires
= jiffies
+ 1;
3523 arp_timer
->data
= (unsigned long)bond_dev
;
3524 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
3525 arp_timer
->function
= (void *)&bond_activebackup_arp_mon
;
3527 arp_timer
->function
= (void *)&bond_loadbalance_arp_mon
;
3529 if (bond
->params
.arp_validate
)
3530 bond_register_arp(bond
);
3532 add_timer(arp_timer
);
3535 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3536 struct timer_list
*ad_timer
= &(BOND_AD_INFO(bond
).ad_timer
);
3537 init_timer(ad_timer
);
3538 ad_timer
->expires
= jiffies
+ 1;
3539 ad_timer
->data
= (unsigned long)bond
;
3540 ad_timer
->function
= (void *)&bond_3ad_state_machine_handler
;
3541 add_timer(ad_timer
);
3543 /* register to receive LACPDUs */
3544 bond_register_lacpdu(bond
);
3550 static int bond_close(struct net_device
*bond_dev
)
3552 struct bonding
*bond
= bond_dev
->priv
;
3554 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3555 /* Unregister the receive of LACPDUs */
3556 bond_unregister_lacpdu(bond
);
3559 if (bond
->params
.arp_validate
)
3560 bond_unregister_arp(bond
);
3562 write_lock_bh(&bond
->lock
);
3565 /* signal timers not to re-arm */
3566 bond
->kill_timers
= 1;
3568 write_unlock_bh(&bond
->lock
);
3570 /* del_timer_sync must run without holding the bond->lock
3571 * because a running timer might be trying to hold it too
3574 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3575 del_timer_sync(&bond
->mii_timer
);
3578 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3579 del_timer_sync(&bond
->arp_timer
);
3582 switch (bond
->params
.mode
) {
3583 case BOND_MODE_8023AD
:
3584 del_timer_sync(&(BOND_AD_INFO(bond
).ad_timer
));
3588 del_timer_sync(&(BOND_ALB_INFO(bond
).alb_timer
));
3595 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3596 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3597 /* Must be called only after all
3598 * slaves have been released
3600 bond_alb_deinitialize(bond
);
3606 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3608 struct bonding
*bond
= bond_dev
->priv
;
3609 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3610 struct slave
*slave
;
3613 memset(stats
, 0, sizeof(struct net_device_stats
));
3615 read_lock_bh(&bond
->lock
);
3617 bond_for_each_slave(bond
, slave
, i
) {
3618 if (slave
->dev
->get_stats
) {
3619 sstats
= slave
->dev
->get_stats(slave
->dev
);
3621 stats
->rx_packets
+= sstats
->rx_packets
;
3622 stats
->rx_bytes
+= sstats
->rx_bytes
;
3623 stats
->rx_errors
+= sstats
->rx_errors
;
3624 stats
->rx_dropped
+= sstats
->rx_dropped
;
3626 stats
->tx_packets
+= sstats
->tx_packets
;
3627 stats
->tx_bytes
+= sstats
->tx_bytes
;
3628 stats
->tx_errors
+= sstats
->tx_errors
;
3629 stats
->tx_dropped
+= sstats
->tx_dropped
;
3631 stats
->multicast
+= sstats
->multicast
;
3632 stats
->collisions
+= sstats
->collisions
;
3634 stats
->rx_length_errors
+= sstats
->rx_length_errors
;
3635 stats
->rx_over_errors
+= sstats
->rx_over_errors
;
3636 stats
->rx_crc_errors
+= sstats
->rx_crc_errors
;
3637 stats
->rx_frame_errors
+= sstats
->rx_frame_errors
;
3638 stats
->rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3639 stats
->rx_missed_errors
+= sstats
->rx_missed_errors
;
3641 stats
->tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3642 stats
->tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3643 stats
->tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3644 stats
->tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3645 stats
->tx_window_errors
+= sstats
->tx_window_errors
;
3649 read_unlock_bh(&bond
->lock
);
3654 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3656 struct net_device
*slave_dev
= NULL
;
3657 struct ifbond k_binfo
;
3658 struct ifbond __user
*u_binfo
= NULL
;
3659 struct ifslave k_sinfo
;
3660 struct ifslave __user
*u_sinfo
= NULL
;
3661 struct mii_ioctl_data
*mii
= NULL
;
3664 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3665 bond_dev
->name
, cmd
);
3677 * We do this again just in case we were called by SIOCGMIIREG
3678 * instead of SIOCGMIIPHY.
3685 if (mii
->reg_num
== 1) {
3686 struct bonding
*bond
= bond_dev
->priv
;
3688 read_lock_bh(&bond
->lock
);
3689 read_lock(&bond
->curr_slave_lock
);
3690 if (netif_carrier_ok(bond
->dev
)) {
3691 mii
->val_out
= BMSR_LSTATUS
;
3693 read_unlock(&bond
->curr_slave_lock
);
3694 read_unlock_bh(&bond
->lock
);
3698 case BOND_INFO_QUERY_OLD
:
3699 case SIOCBONDINFOQUERY
:
3700 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
3702 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
3706 res
= bond_info_query(bond_dev
, &k_binfo
);
3708 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
3714 case BOND_SLAVE_INFO_QUERY_OLD
:
3715 case SIOCBONDSLAVEINFOQUERY
:
3716 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
3718 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
3722 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
3724 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
3735 if (!capable(CAP_NET_ADMIN
)) {
3739 down_write(&(bonding_rwsem
));
3740 slave_dev
= dev_get_by_name(ifr
->ifr_slave
);
3742 dprintk("slave_dev=%p: \n", slave_dev
);
3747 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
3749 case BOND_ENSLAVE_OLD
:
3750 case SIOCBONDENSLAVE
:
3751 res
= bond_enslave(bond_dev
, slave_dev
);
3753 case BOND_RELEASE_OLD
:
3754 case SIOCBONDRELEASE
:
3755 res
= bond_release(bond_dev
, slave_dev
);
3757 case BOND_SETHWADDR_OLD
:
3758 case SIOCBONDSETHWADDR
:
3759 res
= bond_sethwaddr(bond_dev
, slave_dev
);
3761 case BOND_CHANGE_ACTIVE_OLD
:
3762 case SIOCBONDCHANGEACTIVE
:
3763 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
3772 up_write(&(bonding_rwsem
));
3776 static void bond_set_multicast_list(struct net_device
*bond_dev
)
3778 struct bonding
*bond
= bond_dev
->priv
;
3779 struct dev_mc_list
*dmi
;
3781 write_lock_bh(&bond
->lock
);
3784 * Do promisc before checking multicast_mode
3786 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
3787 bond_set_promiscuity(bond
, 1);
3790 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
3791 bond_set_promiscuity(bond
, -1);
3794 /* set allmulti flag to slaves */
3795 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
3796 bond_set_allmulti(bond
, 1);
3799 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
3800 bond_set_allmulti(bond
, -1);
3803 bond
->flags
= bond_dev
->flags
;
3805 /* looking for addresses to add to slaves' mc list */
3806 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
3807 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
3808 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3812 /* looking for addresses to delete from slaves' list */
3813 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
3814 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
3815 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
3819 /* save master's multicast list */
3820 bond_mc_list_destroy(bond
);
3821 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
3823 write_unlock_bh(&bond
->lock
);
3827 * Change the MTU of all of a master's slaves to match the master
3829 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
3831 struct bonding
*bond
= bond_dev
->priv
;
3832 struct slave
*slave
, *stop_at
;
3836 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
3837 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
3839 /* Can't hold bond->lock with bh disabled here since
3840 * some base drivers panic. On the other hand we can't
3841 * hold bond->lock without bh disabled because we'll
3842 * deadlock. The only solution is to rely on the fact
3843 * that we're under rtnl_lock here, and the slaves
3844 * list won't change. This doesn't solve the problem
3845 * of setting the slave's MTU while it is
3846 * transmitting, but the assumption is that the base
3847 * driver can handle that.
3849 * TODO: figure out a way to safely iterate the slaves
3850 * list, but without holding a lock around the actual
3851 * call to the base driver.
3854 bond_for_each_slave(bond
, slave
, i
) {
3855 dprintk("s %p s->p %p c_m %p\n", slave
,
3856 slave
->prev
, slave
->dev
->change_mtu
);
3858 res
= dev_set_mtu(slave
->dev
, new_mtu
);
3861 /* If we failed to set the slave's mtu to the new value
3862 * we must abort the operation even in ACTIVE_BACKUP
3863 * mode, because if we allow the backup slaves to have
3864 * different mtu values than the active slave we'll
3865 * need to change their mtu when doing a failover. That
3866 * means changing their mtu from timer context, which
3867 * is probably not a good idea.
3869 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3874 bond_dev
->mtu
= new_mtu
;
3879 /* unwind from head to the slave that failed */
3881 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3884 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
3886 dprintk("unwind err %d dev %s\n", tmp_res
,
3897 * Note that many devices must be down to change the HW address, and
3898 * downing the master releases all slaves. We can make bonds full of
3899 * bonding devices to test this, however.
3901 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
3903 struct bonding
*bond
= bond_dev
->priv
;
3904 struct sockaddr
*sa
= addr
, tmp_sa
;
3905 struct slave
*slave
, *stop_at
;
3909 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
3911 if (!is_valid_ether_addr(sa
->sa_data
)) {
3912 return -EADDRNOTAVAIL
;
3915 /* Can't hold bond->lock with bh disabled here since
3916 * some base drivers panic. On the other hand we can't
3917 * hold bond->lock without bh disabled because we'll
3918 * deadlock. The only solution is to rely on the fact
3919 * that we're under rtnl_lock here, and the slaves
3920 * list won't change. This doesn't solve the problem
3921 * of setting the slave's hw address while it is
3922 * transmitting, but the assumption is that the base
3923 * driver can handle that.
3925 * TODO: figure out a way to safely iterate the slaves
3926 * list, but without holding a lock around the actual
3927 * call to the base driver.
3930 bond_for_each_slave(bond
, slave
, i
) {
3931 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
3933 if (slave
->dev
->set_mac_address
== NULL
) {
3935 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
3939 res
= dev_set_mac_address(slave
->dev
, addr
);
3941 /* TODO: consider downing the slave
3943 * User should expect communications
3944 * breakage anyway until ARP finish
3947 dprintk("err %d %s\n", res
, slave
->dev
->name
);
3953 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
3957 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
3958 tmp_sa
.sa_family
= bond_dev
->type
;
3960 /* unwind from head to the slave that failed */
3962 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
3965 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
3967 dprintk("unwind err %d dev %s\n", tmp_res
,
3975 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
3977 struct bonding
*bond
= bond_dev
->priv
;
3978 struct slave
*slave
, *start_at
;
3982 read_lock(&bond
->lock
);
3984 if (!BOND_IS_OK(bond
)) {
3988 read_lock(&bond
->curr_slave_lock
);
3989 slave
= start_at
= bond
->curr_active_slave
;
3990 read_unlock(&bond
->curr_slave_lock
);
3996 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
3997 if (IS_UP(slave
->dev
) &&
3998 (slave
->link
== BOND_LINK_UP
) &&
3999 (slave
->state
== BOND_STATE_ACTIVE
)) {
4000 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4002 write_lock(&bond
->curr_slave_lock
);
4003 bond
->curr_active_slave
= slave
->next
;
4004 write_unlock(&bond
->curr_slave_lock
);
4013 /* no suitable interface, frame not sent */
4016 read_unlock(&bond
->lock
);
4020 static void bond_activebackup_xmit_copy(struct sk_buff
*skb
,
4021 struct bonding
*bond
,
4022 struct slave
*slave
)
4024 struct sk_buff
*skb2
= skb_copy(skb
, GFP_ATOMIC
);
4025 struct ethhdr
*eth_data
;
4030 printk(KERN_ERR DRV_NAME
": Error: "
4031 "bond_activebackup_xmit_copy(): skb_copy() failed\n");
4035 skb2
->mac
.raw
= (unsigned char *)skb2
->data
;
4036 eth_data
= eth_hdr(skb2
);
4038 /* Pick an appropriate source MAC address
4039 * -- use slave's perm MAC addr, unless used by bond
4040 * -- otherwise, borrow active slave's perm MAC addr
4041 * since that will not be used
4043 hwaddr
= slave
->perm_hwaddr
;
4044 if (!memcmp(eth_data
->h_source
, hwaddr
, ETH_ALEN
))
4045 hwaddr
= bond
->curr_active_slave
->perm_hwaddr
;
4047 /* Set source MAC address appropriately */
4048 memcpy(eth_data
->h_source
, hwaddr
, ETH_ALEN
);
4050 res
= bond_dev_queue_xmit(bond
, skb2
, slave
->dev
);
4052 dev_kfree_skb(skb2
);
4058 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4059 * the bond has a usable interface.
4061 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4063 struct bonding
*bond
= bond_dev
->priv
;
4066 read_lock(&bond
->lock
);
4067 read_lock(&bond
->curr_slave_lock
);
4069 if (!BOND_IS_OK(bond
)) {
4073 if (!bond
->curr_active_slave
)
4076 /* Xmit IGMP frames on all slaves to ensure rapid fail-over
4077 for multicast traffic on snooping switches */
4078 if (skb
->protocol
== __constant_htons(ETH_P_IP
) &&
4079 skb
->nh
.iph
->protocol
== IPPROTO_IGMP
) {
4080 struct slave
*slave
, *active_slave
;
4083 active_slave
= bond
->curr_active_slave
;
4084 bond_for_each_slave_from_to(bond
, slave
, i
, active_slave
->next
,
4086 if (IS_UP(slave
->dev
) &&
4087 (slave
->link
== BOND_LINK_UP
))
4088 bond_activebackup_xmit_copy(skb
, bond
, slave
);
4091 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4095 /* no suitable interface, frame not sent */
4098 read_unlock(&bond
->curr_slave_lock
);
4099 read_unlock(&bond
->lock
);
4104 * In bond_xmit_xor() , we determine the output device by using a pre-
4105 * determined xmit_hash_policy(), If the selected device is not enabled,
4106 * find the next active slave.
4108 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4110 struct bonding
*bond
= bond_dev
->priv
;
4111 struct slave
*slave
, *start_at
;
4116 read_lock(&bond
->lock
);
4118 if (!BOND_IS_OK(bond
)) {
4122 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4124 bond_for_each_slave(bond
, slave
, i
) {
4133 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4134 if (IS_UP(slave
->dev
) &&
4135 (slave
->link
== BOND_LINK_UP
) &&
4136 (slave
->state
== BOND_STATE_ACTIVE
)) {
4137 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4144 /* no suitable interface, frame not sent */
4147 read_unlock(&bond
->lock
);
4152 * in broadcast mode, we send everything to all usable interfaces.
4154 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4156 struct bonding
*bond
= bond_dev
->priv
;
4157 struct slave
*slave
, *start_at
;
4158 struct net_device
*tx_dev
= NULL
;
4162 read_lock(&bond
->lock
);
4164 if (!BOND_IS_OK(bond
)) {
4168 read_lock(&bond
->curr_slave_lock
);
4169 start_at
= bond
->curr_active_slave
;
4170 read_unlock(&bond
->curr_slave_lock
);
4176 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4177 if (IS_UP(slave
->dev
) &&
4178 (slave
->link
== BOND_LINK_UP
) &&
4179 (slave
->state
== BOND_STATE_ACTIVE
)) {
4181 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4183 printk(KERN_ERR DRV_NAME
4184 ": %s: Error: bond_xmit_broadcast(): "
4185 "skb_clone() failed\n",
4190 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4192 dev_kfree_skb(skb2
);
4196 tx_dev
= slave
->dev
;
4201 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4206 /* no suitable interface, frame not sent */
4209 /* frame sent to all suitable interfaces */
4210 read_unlock(&bond
->lock
);
4214 /*------------------------- Device initialization ---------------------------*/
4217 * set bond mode specific net device operations
4219 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4221 struct net_device
*bond_dev
= bond
->dev
;
4224 case BOND_MODE_ROUNDROBIN
:
4225 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4227 case BOND_MODE_ACTIVEBACKUP
:
4228 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4231 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4232 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4233 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4235 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4237 case BOND_MODE_BROADCAST
:
4238 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4240 case BOND_MODE_8023AD
:
4241 bond_set_master_3ad_flags(bond
);
4242 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4243 if (bond
->params
.xmit_policy
== BOND_XMIT_POLICY_LAYER34
)
4244 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4246 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4249 bond_set_master_alb_flags(bond
);
4252 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4253 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4256 /* Should never happen, mode already checked */
4257 printk(KERN_ERR DRV_NAME
4258 ": %s: Error: Unknown bonding mode %d\n",
4265 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4266 struct ethtool_drvinfo
*drvinfo
)
4268 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4269 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4270 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4273 static const struct ethtool_ops bond_ethtool_ops
= {
4274 .get_tx_csum
= ethtool_op_get_tx_csum
,
4275 .get_tso
= ethtool_op_get_tso
,
4276 .get_ufo
= ethtool_op_get_ufo
,
4277 .get_sg
= ethtool_op_get_sg
,
4278 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4282 * Does not allocate but creates a /proc entry.
4285 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4287 struct bonding
*bond
= bond_dev
->priv
;
4289 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4291 /* initialize rwlocks */
4292 rwlock_init(&bond
->lock
);
4293 rwlock_init(&bond
->curr_slave_lock
);
4295 bond
->params
= *params
; /* copy params struct */
4297 /* Initialize pointers */
4298 bond
->first_slave
= NULL
;
4299 bond
->curr_active_slave
= NULL
;
4300 bond
->current_arp_slave
= NULL
;
4301 bond
->primary_slave
= NULL
;
4302 bond
->dev
= bond_dev
;
4303 INIT_LIST_HEAD(&bond
->vlan_list
);
4305 /* Initialize the device entry points */
4306 bond_dev
->open
= bond_open
;
4307 bond_dev
->stop
= bond_close
;
4308 bond_dev
->get_stats
= bond_get_stats
;
4309 bond_dev
->do_ioctl
= bond_do_ioctl
;
4310 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4311 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4312 bond_dev
->change_mtu
= bond_change_mtu
;
4313 bond_dev
->set_mac_address
= bond_set_mac_address
;
4315 bond_set_mode_ops(bond
, bond
->params
.mode
);
4317 bond_dev
->destructor
= free_netdev
;
4319 /* Initialize the device options */
4320 bond_dev
->tx_queue_len
= 0;
4321 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4322 bond_dev
->priv_flags
|= IFF_BONDING
;
4324 /* At first, we block adding VLANs. That's the only way to
4325 * prevent problems that occur when adding VLANs over an
4326 * empty bond. The block will be removed once non-challenged
4327 * slaves are enslaved.
4329 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4331 /* don't acquire bond device's netif_tx_lock when
4333 bond_dev
->features
|= NETIF_F_LLTX
;
4335 /* By default, we declare the bond to be fully
4336 * VLAN hardware accelerated capable. Special
4337 * care is taken in the various xmit functions
4338 * when there are slaves that are not hw accel
4341 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4342 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4343 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4344 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4345 NETIF_F_HW_VLAN_RX
|
4346 NETIF_F_HW_VLAN_FILTER
);
4348 #ifdef CONFIG_PROC_FS
4349 bond_create_proc_entry(bond
);
4352 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4357 /* De-initialize device specific data.
4358 * Caller must hold rtnl_lock.
4360 void bond_deinit(struct net_device
*bond_dev
)
4362 struct bonding
*bond
= bond_dev
->priv
;
4364 list_del(&bond
->bond_list
);
4366 #ifdef CONFIG_PROC_FS
4367 bond_remove_proc_entry(bond
);
4371 /* Unregister and free all bond devices.
4372 * Caller must hold rtnl_lock.
4374 static void bond_free_all(void)
4376 struct bonding
*bond
, *nxt
;
4378 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4379 struct net_device
*bond_dev
= bond
->dev
;
4381 bond_mc_list_destroy(bond
);
4382 /* Release the bonded slaves */
4383 bond_release_all(bond_dev
);
4384 unregister_netdevice(bond_dev
);
4385 bond_deinit(bond_dev
);
4388 #ifdef CONFIG_PROC_FS
4389 bond_destroy_proc_dir();
4393 /*------------------------- Module initialization ---------------------------*/
4396 * Convert string input module parms. Accept either the
4397 * number of the mode or its string name.
4399 int bond_parse_parm(char *mode_arg
, struct bond_parm_tbl
*tbl
)
4403 for (i
= 0; tbl
[i
].modename
; i
++) {
4404 if ((isdigit(*mode_arg
) &&
4405 tbl
[i
].mode
== simple_strtol(mode_arg
, NULL
, 0)) ||
4406 (strncmp(mode_arg
, tbl
[i
].modename
,
4407 strlen(tbl
[i
].modename
)) == 0)) {
4415 static int bond_check_params(struct bond_params
*params
)
4417 int arp_validate_value
;
4420 * Convert string parameters.
4423 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4424 if (bond_mode
== -1) {
4425 printk(KERN_ERR DRV_NAME
4426 ": Error: Invalid bonding mode \"%s\"\n",
4427 mode
== NULL
? "NULL" : mode
);
4432 if (xmit_hash_policy
) {
4433 if ((bond_mode
!= BOND_MODE_XOR
) &&
4434 (bond_mode
!= BOND_MODE_8023AD
)) {
4435 printk(KERN_INFO DRV_NAME
4436 ": xor_mode param is irrelevant in mode %s\n",
4437 bond_mode_name(bond_mode
));
4439 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4441 if (xmit_hashtype
== -1) {
4442 printk(KERN_ERR DRV_NAME
4443 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4444 xmit_hash_policy
== NULL
? "NULL" :
4452 if (bond_mode
!= BOND_MODE_8023AD
) {
4453 printk(KERN_INFO DRV_NAME
4454 ": lacp_rate param is irrelevant in mode %s\n",
4455 bond_mode_name(bond_mode
));
4457 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4458 if (lacp_fast
== -1) {
4459 printk(KERN_ERR DRV_NAME
4460 ": Error: Invalid lacp rate \"%s\"\n",
4461 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4467 if (max_bonds
< 1 || max_bonds
> INT_MAX
) {
4468 printk(KERN_WARNING DRV_NAME
4469 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4470 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4471 max_bonds
, 1, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4472 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4476 printk(KERN_WARNING DRV_NAME
4477 ": Warning: miimon module parameter (%d), "
4478 "not in range 0-%d, so it was reset to %d\n",
4479 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4480 miimon
= BOND_LINK_MON_INTERV
;
4484 printk(KERN_WARNING DRV_NAME
4485 ": Warning: updelay module parameter (%d), "
4486 "not in range 0-%d, so it was reset to 0\n",
4491 if (downdelay
< 0) {
4492 printk(KERN_WARNING DRV_NAME
4493 ": Warning: downdelay module parameter (%d), "
4494 "not in range 0-%d, so it was reset to 0\n",
4495 downdelay
, INT_MAX
);
4499 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4500 printk(KERN_WARNING DRV_NAME
4501 ": Warning: use_carrier module parameter (%d), "
4502 "not of valid value (0/1), so it was set to 1\n",
4507 /* reset values for 802.3ad */
4508 if (bond_mode
== BOND_MODE_8023AD
) {
4510 printk(KERN_WARNING DRV_NAME
4511 ": Warning: miimon must be specified, "
4512 "otherwise bonding will not detect link "
4513 "failure, speed and duplex which are "
4514 "essential for 802.3ad operation\n");
4515 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4520 /* reset values for TLB/ALB */
4521 if ((bond_mode
== BOND_MODE_TLB
) ||
4522 (bond_mode
== BOND_MODE_ALB
)) {
4524 printk(KERN_WARNING DRV_NAME
4525 ": Warning: miimon must be specified, "
4526 "otherwise bonding will not detect link "
4527 "failure and link speed which are essential "
4528 "for TLB/ALB load balancing\n");
4529 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4534 if (bond_mode
== BOND_MODE_ALB
) {
4535 printk(KERN_NOTICE DRV_NAME
4536 ": In ALB mode you might experience client "
4537 "disconnections upon reconnection of a link if the "
4538 "bonding module updelay parameter (%d msec) is "
4539 "incompatible with the forwarding delay time of the "
4545 if (updelay
|| downdelay
) {
4546 /* just warn the user the up/down delay will have
4547 * no effect since miimon is zero...
4549 printk(KERN_WARNING DRV_NAME
4550 ": Warning: miimon module parameter not set "
4551 "and updelay (%d) or downdelay (%d) module "
4552 "parameter is set; updelay and downdelay have "
4553 "no effect unless miimon is set\n",
4554 updelay
, downdelay
);
4557 /* don't allow arp monitoring */
4559 printk(KERN_WARNING DRV_NAME
4560 ": Warning: miimon (%d) and arp_interval (%d) "
4561 "can't be used simultaneously, disabling ARP "
4563 miimon
, arp_interval
);
4567 if ((updelay
% miimon
) != 0) {
4568 printk(KERN_WARNING DRV_NAME
4569 ": Warning: updelay (%d) is not a multiple "
4570 "of miimon (%d), updelay rounded to %d ms\n",
4571 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4576 if ((downdelay
% miimon
) != 0) {
4577 printk(KERN_WARNING DRV_NAME
4578 ": Warning: downdelay (%d) is not a multiple "
4579 "of miimon (%d), downdelay rounded to %d ms\n",
4581 (downdelay
/ miimon
) * miimon
);
4584 downdelay
/= miimon
;
4587 if (arp_interval
< 0) {
4588 printk(KERN_WARNING DRV_NAME
4589 ": Warning: arp_interval module parameter (%d) "
4590 ", not in range 0-%d, so it was reset to %d\n",
4591 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4592 arp_interval
= BOND_LINK_ARP_INTERV
;
4595 for (arp_ip_count
= 0;
4596 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4598 /* not complete check, but should be good enough to
4600 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4601 printk(KERN_WARNING DRV_NAME
4602 ": Warning: bad arp_ip_target module parameter "
4603 "(%s), ARP monitoring will not be performed\n",
4604 arp_ip_target
[arp_ip_count
]);
4607 u32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4608 arp_target
[arp_ip_count
] = ip
;
4612 if (arp_interval
&& !arp_ip_count
) {
4613 /* don't allow arping if no arp_ip_target given... */
4614 printk(KERN_WARNING DRV_NAME
4615 ": Warning: arp_interval module parameter (%d) "
4616 "specified without providing an arp_ip_target "
4617 "parameter, arp_interval was reset to 0\n",
4623 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4624 printk(KERN_ERR DRV_NAME
4625 ": arp_validate only supported in active-backup mode\n");
4628 if (!arp_interval
) {
4629 printk(KERN_ERR DRV_NAME
4630 ": arp_validate requires arp_interval\n");
4634 arp_validate_value
= bond_parse_parm(arp_validate
,
4636 if (arp_validate_value
== -1) {
4637 printk(KERN_ERR DRV_NAME
4638 ": Error: invalid arp_validate \"%s\"\n",
4639 arp_validate
== NULL
? "NULL" : arp_validate
);
4643 arp_validate_value
= 0;
4646 printk(KERN_INFO DRV_NAME
4647 ": MII link monitoring set to %d ms\n",
4649 } else if (arp_interval
) {
4652 printk(KERN_INFO DRV_NAME
4653 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4655 arp_validate_tbl
[arp_validate_value
].modename
,
4658 for (i
= 0; i
< arp_ip_count
; i
++)
4659 printk (" %s", arp_ip_target
[i
]);
4664 /* miimon and arp_interval not set, we need one so things
4665 * work as expected, see bonding.txt for details
4667 printk(KERN_WARNING DRV_NAME
4668 ": Warning: either miimon or arp_interval and "
4669 "arp_ip_target module parameters must be specified, "
4670 "otherwise bonding will not detect link failures! see "
4671 "bonding.txt for details.\n");
4674 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4675 /* currently, using a primary only makes sense
4676 * in active backup, TLB or ALB modes
4678 printk(KERN_WARNING DRV_NAME
4679 ": Warning: %s primary device specified but has no "
4680 "effect in %s mode\n",
4681 primary
, bond_mode_name(bond_mode
));
4685 /* fill params struct with the proper values */
4686 params
->mode
= bond_mode
;
4687 params
->xmit_policy
= xmit_hashtype
;
4688 params
->miimon
= miimon
;
4689 params
->arp_interval
= arp_interval
;
4690 params
->arp_validate
= arp_validate_value
;
4691 params
->updelay
= updelay
;
4692 params
->downdelay
= downdelay
;
4693 params
->use_carrier
= use_carrier
;
4694 params
->lacp_fast
= lacp_fast
;
4695 params
->primary
[0] = 0;
4698 strncpy(params
->primary
, primary
, IFNAMSIZ
);
4699 params
->primary
[IFNAMSIZ
- 1] = 0;
4702 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
4707 static struct lock_class_key bonding_netdev_xmit_lock_key
;
4709 /* Create a new bond based on the specified name and bonding parameters.
4710 * If name is NULL, obtain a suitable "bond%d" name for us.
4711 * Caller must NOT hold rtnl_lock; we need to release it here before we
4712 * set up our sysfs entries.
4714 int bond_create(char *name
, struct bond_params
*params
, struct bonding
**newbond
)
4716 struct net_device
*bond_dev
;
4720 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
4723 printk(KERN_ERR DRV_NAME
4724 ": %s: eek! can't alloc netdev!\n",
4731 res
= dev_alloc_name(bond_dev
, "bond%d");
4736 /* bond_init() must be called after dev_alloc_name() (for the
4737 * /proc files), but before register_netdevice(), because we
4738 * need to set function pointers.
4741 res
= bond_init(bond_dev
, params
);
4746 SET_MODULE_OWNER(bond_dev
);
4748 res
= register_netdevice(bond_dev
);
4753 lockdep_set_class(&bond_dev
->_xmit_lock
, &bonding_netdev_xmit_lock_key
);
4756 *newbond
= bond_dev
->priv
;
4758 netif_carrier_off(bond_dev
);
4760 rtnl_unlock(); /* allows sysfs registration of net device */
4761 res
= bond_create_sysfs_entry(bond_dev
->priv
);
4770 bond_deinit(bond_dev
);
4772 free_netdev(bond_dev
);
4778 static int __init
bonding_init(void)
4783 printk(KERN_INFO
"%s", version
);
4785 res
= bond_check_params(&bonding_defaults
);
4790 #ifdef CONFIG_PROC_FS
4791 bond_create_proc_dir();
4793 for (i
= 0; i
< max_bonds
; i
++) {
4794 res
= bond_create(NULL
, &bonding_defaults
, NULL
);
4799 res
= bond_create_sysfs();
4803 register_netdevice_notifier(&bond_netdev_notifier
);
4804 register_inetaddr_notifier(&bond_inetaddr_notifier
);
4810 bond_destroy_sysfs();
4817 static void __exit
bonding_exit(void)
4819 unregister_netdevice_notifier(&bond_netdev_notifier
);
4820 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
4824 bond_destroy_sysfs();
4828 module_init(bonding_init
);
4829 module_exit(bonding_exit
);
4830 MODULE_LICENSE("GPL");
4831 MODULE_VERSION(DRV_VERSION
);
4832 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
4833 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4834 MODULE_SUPPORTED_DEVICE("most ethernet devices");