2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 //#define BONDING_DEBUG 1
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
56 #include <asm/system.h>
59 #include <asm/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <linux/jiffies.h>
78 #include <net/route.h>
79 #include <net/net_namespace.h>
84 /*---------------------------- Module parameters ----------------------------*/
86 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
87 #define BOND_LINK_MON_INTERV 0
88 #define BOND_LINK_ARP_INTERV 0
90 static int max_bonds
= BOND_DEFAULT_MAX_BONDS
;
91 static int num_grat_arp
= 1;
92 static int miimon
= BOND_LINK_MON_INTERV
;
93 static int updelay
= 0;
94 static int downdelay
= 0;
95 static int use_carrier
= 1;
96 static char *mode
= NULL
;
97 static char *primary
= NULL
;
98 static char *lacp_rate
= NULL
;
99 static char *xmit_hash_policy
= NULL
;
100 static int arp_interval
= BOND_LINK_ARP_INTERV
;
101 static char *arp_ip_target
[BOND_MAX_ARP_TARGETS
] = { NULL
, };
102 static char *arp_validate
= NULL
;
103 static char *fail_over_mac
= NULL
;
104 struct bond_params bonding_defaults
;
106 module_param(max_bonds
, int, 0);
107 MODULE_PARM_DESC(max_bonds
, "Max number of bonded devices");
108 module_param(num_grat_arp
, int, 0644);
109 MODULE_PARM_DESC(num_grat_arp
, "Number of gratuitous ARP packets to send on failover event");
110 module_param(miimon
, int, 0);
111 MODULE_PARM_DESC(miimon
, "Link check interval in milliseconds");
112 module_param(updelay
, int, 0);
113 MODULE_PARM_DESC(updelay
, "Delay before considering link up, in milliseconds");
114 module_param(downdelay
, int, 0);
115 MODULE_PARM_DESC(downdelay
, "Delay before considering link down, "
117 module_param(use_carrier
, int, 0);
118 MODULE_PARM_DESC(use_carrier
, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
119 "0 for off, 1 for on (default)");
120 module_param(mode
, charp
, 0);
121 MODULE_PARM_DESC(mode
, "Mode of operation : 0 for balance-rr, "
122 "1 for active-backup, 2 for balance-xor, "
123 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
124 "6 for balance-alb");
125 module_param(primary
, charp
, 0);
126 MODULE_PARM_DESC(primary
, "Primary network device to use");
127 module_param(lacp_rate
, charp
, 0);
128 MODULE_PARM_DESC(lacp_rate
, "LACPDU tx rate to request from 802.3ad partner "
130 module_param(xmit_hash_policy
, charp
, 0);
131 MODULE_PARM_DESC(xmit_hash_policy
, "XOR hashing method: 0 for layer 2 (default)"
132 ", 1 for layer 3+4");
133 module_param(arp_interval
, int, 0);
134 MODULE_PARM_DESC(arp_interval
, "arp interval in milliseconds");
135 module_param_array(arp_ip_target
, charp
, NULL
, 0);
136 MODULE_PARM_DESC(arp_ip_target
, "arp targets in n.n.n.n form");
137 module_param(arp_validate
, charp
, 0);
138 MODULE_PARM_DESC(arp_validate
, "validate src/dst of ARP probes: none (default), active, backup or all");
139 module_param(fail_over_mac
, charp
, 0);
140 MODULE_PARM_DESC(fail_over_mac
, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
142 /*----------------------------- Global variables ----------------------------*/
144 static const char * const version
=
145 DRV_DESCRIPTION
": v" DRV_VERSION
" (" DRV_RELDATE
")\n";
147 LIST_HEAD(bond_dev_list
);
149 #ifdef CONFIG_PROC_FS
150 static struct proc_dir_entry
*bond_proc_dir
= NULL
;
153 extern struct rw_semaphore bonding_rwsem
;
154 static __be32 arp_target
[BOND_MAX_ARP_TARGETS
] = { 0, } ;
155 static int arp_ip_count
= 0;
156 static int bond_mode
= BOND_MODE_ROUNDROBIN
;
157 static int xmit_hashtype
= BOND_XMIT_POLICY_LAYER2
;
158 static int lacp_fast
= 0;
161 struct bond_parm_tbl bond_lacp_tbl
[] = {
162 { "slow", AD_LACP_SLOW
},
163 { "fast", AD_LACP_FAST
},
167 struct bond_parm_tbl bond_mode_tbl
[] = {
168 { "balance-rr", BOND_MODE_ROUNDROBIN
},
169 { "active-backup", BOND_MODE_ACTIVEBACKUP
},
170 { "balance-xor", BOND_MODE_XOR
},
171 { "broadcast", BOND_MODE_BROADCAST
},
172 { "802.3ad", BOND_MODE_8023AD
},
173 { "balance-tlb", BOND_MODE_TLB
},
174 { "balance-alb", BOND_MODE_ALB
},
178 struct bond_parm_tbl xmit_hashtype_tbl
[] = {
179 { "layer2", BOND_XMIT_POLICY_LAYER2
},
180 { "layer3+4", BOND_XMIT_POLICY_LAYER34
},
181 { "layer2+3", BOND_XMIT_POLICY_LAYER23
},
185 struct bond_parm_tbl arp_validate_tbl
[] = {
186 { "none", BOND_ARP_VALIDATE_NONE
},
187 { "active", BOND_ARP_VALIDATE_ACTIVE
},
188 { "backup", BOND_ARP_VALIDATE_BACKUP
},
189 { "all", BOND_ARP_VALIDATE_ALL
},
193 struct bond_parm_tbl fail_over_mac_tbl
[] = {
194 { "none", BOND_FOM_NONE
},
195 { "active", BOND_FOM_ACTIVE
},
196 { "follow", BOND_FOM_FOLLOW
},
200 /*-------------------------- Forward declarations ---------------------------*/
202 static void bond_send_gratuitous_arp(struct bonding
*bond
);
203 static void bond_deinit(struct net_device
*bond_dev
);
205 /*---------------------------- General routines -----------------------------*/
207 static const char *bond_mode_name(int mode
)
210 case BOND_MODE_ROUNDROBIN
:
211 return "load balancing (round-robin)";
212 case BOND_MODE_ACTIVEBACKUP
:
213 return "fault-tolerance (active-backup)";
215 return "load balancing (xor)";
216 case BOND_MODE_BROADCAST
:
217 return "fault-tolerance (broadcast)";
218 case BOND_MODE_8023AD
:
219 return "IEEE 802.3ad Dynamic link aggregation";
221 return "transmit load balancing";
223 return "adaptive load balancing";
229 /*---------------------------------- VLAN -----------------------------------*/
232 * bond_add_vlan - add a new vlan id on bond
233 * @bond: bond that got the notification
234 * @vlan_id: the vlan id to add
236 * Returns -ENOMEM if allocation failed.
238 static int bond_add_vlan(struct bonding
*bond
, unsigned short vlan_id
)
240 struct vlan_entry
*vlan
;
242 dprintk("bond: %s, vlan id %d\n",
243 (bond
? bond
->dev
->name
: "None"), vlan_id
);
245 vlan
= kmalloc(sizeof(struct vlan_entry
), GFP_KERNEL
);
250 INIT_LIST_HEAD(&vlan
->vlan_list
);
251 vlan
->vlan_id
= vlan_id
;
254 write_lock_bh(&bond
->lock
);
256 list_add_tail(&vlan
->vlan_list
, &bond
->vlan_list
);
258 write_unlock_bh(&bond
->lock
);
260 dprintk("added VLAN ID %d on bond %s\n", vlan_id
, bond
->dev
->name
);
266 * bond_del_vlan - delete a vlan id from bond
267 * @bond: bond that got the notification
268 * @vlan_id: the vlan id to delete
270 * returns -ENODEV if @vlan_id was not found in @bond.
272 static int bond_del_vlan(struct bonding
*bond
, unsigned short vlan_id
)
274 struct vlan_entry
*vlan
;
277 dprintk("bond: %s, vlan id %d\n", bond
->dev
->name
, vlan_id
);
279 write_lock_bh(&bond
->lock
);
281 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
282 if (vlan
->vlan_id
== vlan_id
) {
283 list_del(&vlan
->vlan_list
);
285 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
286 (bond
->params
.mode
== BOND_MODE_ALB
)) {
287 bond_alb_clear_vlan(bond
, vlan_id
);
290 dprintk("removed VLAN ID %d from bond %s\n", vlan_id
,
295 if (list_empty(&bond
->vlan_list
) &&
296 (bond
->slave_cnt
== 0)) {
297 /* Last VLAN removed and no slaves, so
298 * restore block on adding VLANs. This will
299 * be removed once new slaves that are not
300 * VLAN challenged will be added.
302 bond
->dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
310 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id
,
314 write_unlock_bh(&bond
->lock
);
319 * bond_has_challenged_slaves
320 * @bond: the bond we're working on
322 * Searches the slave list. Returns 1 if a vlan challenged slave
323 * was found, 0 otherwise.
325 * Assumes bond->lock is held.
327 static int bond_has_challenged_slaves(struct bonding
*bond
)
332 bond_for_each_slave(bond
, slave
, i
) {
333 if (slave
->dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
334 dprintk("found VLAN challenged slave - %s\n",
340 dprintk("no VLAN challenged slaves found\n");
345 * bond_next_vlan - safely skip to the next item in the vlans list.
346 * @bond: the bond we're working on
347 * @curr: item we're advancing from
349 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
350 * or @curr->next otherwise (even if it is @curr itself again).
352 * Caller must hold bond->lock
354 struct vlan_entry
*bond_next_vlan(struct bonding
*bond
, struct vlan_entry
*curr
)
356 struct vlan_entry
*next
, *last
;
358 if (list_empty(&bond
->vlan_list
)) {
363 next
= list_entry(bond
->vlan_list
.next
,
364 struct vlan_entry
, vlan_list
);
366 last
= list_entry(bond
->vlan_list
.prev
,
367 struct vlan_entry
, vlan_list
);
369 next
= list_entry(bond
->vlan_list
.next
,
370 struct vlan_entry
, vlan_list
);
372 next
= list_entry(curr
->vlan_list
.next
,
373 struct vlan_entry
, vlan_list
);
381 * bond_dev_queue_xmit - Prepare skb for xmit.
383 * @bond: bond device that got this skb for tx.
384 * @skb: hw accel VLAN tagged skb to transmit
385 * @slave_dev: slave that is supposed to xmit this skbuff
387 * When the bond gets an skb to transmit that is
388 * already hardware accelerated VLAN tagged, and it
389 * needs to relay this skb to a slave that is not
390 * hw accel capable, the skb needs to be "unaccelerated",
391 * i.e. strip the hwaccel tag and re-insert it as part
394 int bond_dev_queue_xmit(struct bonding
*bond
, struct sk_buff
*skb
, struct net_device
*slave_dev
)
396 unsigned short uninitialized_var(vlan_id
);
398 if (!list_empty(&bond
->vlan_list
) &&
399 !(slave_dev
->features
& NETIF_F_HW_VLAN_TX
) &&
400 vlan_get_tag(skb
, &vlan_id
) == 0) {
401 skb
->dev
= slave_dev
;
402 skb
= vlan_put_tag(skb
, vlan_id
);
404 /* vlan_put_tag() frees the skb in case of error,
405 * so return success here so the calling functions
406 * won't attempt to free is again.
411 skb
->dev
= slave_dev
;
421 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
422 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
424 * a. This operation is performed in IOCTL context,
425 * b. The operation is protected by the RTNL semaphore in the 8021q code,
426 * c. Holding a lock with BH disabled while directly calling a base driver
427 * entry point is generally a BAD idea.
429 * The design of synchronization/protection for this operation in the 8021q
430 * module is good for one or more VLAN devices over a single physical device
431 * and cannot be extended for a teaming solution like bonding, so there is a
432 * potential race condition here where a net device from the vlan group might
433 * be referenced (either by a base driver or the 8021q code) while it is being
434 * removed from the system. However, it turns out we're not making matters
435 * worse, and if it works for regular VLAN usage it will work here too.
439 * bond_vlan_rx_register - Propagates registration to slaves
440 * @bond_dev: bonding net device that got called
441 * @grp: vlan group being registered
443 static void bond_vlan_rx_register(struct net_device
*bond_dev
, struct vlan_group
*grp
)
445 struct bonding
*bond
= bond_dev
->priv
;
451 bond_for_each_slave(bond
, slave
, i
) {
452 struct net_device
*slave_dev
= slave
->dev
;
454 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
455 slave_dev
->vlan_rx_register
) {
456 slave_dev
->vlan_rx_register(slave_dev
, grp
);
462 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
463 * @bond_dev: bonding net device that got called
464 * @vid: vlan id being added
466 static void bond_vlan_rx_add_vid(struct net_device
*bond_dev
, uint16_t vid
)
468 struct bonding
*bond
= bond_dev
->priv
;
472 bond_for_each_slave(bond
, slave
, i
) {
473 struct net_device
*slave_dev
= slave
->dev
;
475 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
476 slave_dev
->vlan_rx_add_vid
) {
477 slave_dev
->vlan_rx_add_vid(slave_dev
, vid
);
481 res
= bond_add_vlan(bond
, vid
);
483 printk(KERN_ERR DRV_NAME
484 ": %s: Error: Failed to add vlan id %d\n",
485 bond_dev
->name
, vid
);
490 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
491 * @bond_dev: bonding net device that got called
492 * @vid: vlan id being removed
494 static void bond_vlan_rx_kill_vid(struct net_device
*bond_dev
, uint16_t vid
)
496 struct bonding
*bond
= bond_dev
->priv
;
498 struct net_device
*vlan_dev
;
501 bond_for_each_slave(bond
, slave
, i
) {
502 struct net_device
*slave_dev
= slave
->dev
;
504 if ((slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) &&
505 slave_dev
->vlan_rx_kill_vid
) {
506 /* Save and then restore vlan_dev in the grp array,
507 * since the slave's driver might clear it.
509 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vid
);
510 slave_dev
->vlan_rx_kill_vid(slave_dev
, vid
);
511 vlan_group_set_device(bond
->vlgrp
, vid
, vlan_dev
);
515 res
= bond_del_vlan(bond
, vid
);
517 printk(KERN_ERR DRV_NAME
518 ": %s: Error: Failed to remove vlan id %d\n",
519 bond_dev
->name
, vid
);
523 static void bond_add_vlans_on_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
525 struct vlan_entry
*vlan
;
527 write_lock_bh(&bond
->lock
);
529 if (list_empty(&bond
->vlan_list
)) {
533 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
534 slave_dev
->vlan_rx_register
) {
535 slave_dev
->vlan_rx_register(slave_dev
, bond
->vlgrp
);
538 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
539 !(slave_dev
->vlan_rx_add_vid
)) {
543 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
544 slave_dev
->vlan_rx_add_vid(slave_dev
, vlan
->vlan_id
);
548 write_unlock_bh(&bond
->lock
);
551 static void bond_del_vlans_from_slave(struct bonding
*bond
, struct net_device
*slave_dev
)
553 struct vlan_entry
*vlan
;
554 struct net_device
*vlan_dev
;
556 write_lock_bh(&bond
->lock
);
558 if (list_empty(&bond
->vlan_list
)) {
562 if (!(slave_dev
->features
& NETIF_F_HW_VLAN_FILTER
) ||
563 !(slave_dev
->vlan_rx_kill_vid
)) {
567 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
568 /* Save and then restore vlan_dev in the grp array,
569 * since the slave's driver might clear it.
571 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
572 slave_dev
->vlan_rx_kill_vid(slave_dev
, vlan
->vlan_id
);
573 vlan_group_set_device(bond
->vlgrp
, vlan
->vlan_id
, vlan_dev
);
577 if ((slave_dev
->features
& NETIF_F_HW_VLAN_RX
) &&
578 slave_dev
->vlan_rx_register
) {
579 slave_dev
->vlan_rx_register(slave_dev
, NULL
);
583 write_unlock_bh(&bond
->lock
);
586 /*------------------------------- Link status -------------------------------*/
589 * Set the carrier state for the master according to the state of its
590 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
591 * do special 802.3ad magic.
593 * Returns zero if carrier state does not change, nonzero if it does.
595 static int bond_set_carrier(struct bonding
*bond
)
600 if (bond
->slave_cnt
== 0)
603 if (bond
->params
.mode
== BOND_MODE_8023AD
)
604 return bond_3ad_set_carrier(bond
);
606 bond_for_each_slave(bond
, slave
, i
) {
607 if (slave
->link
== BOND_LINK_UP
) {
608 if (!netif_carrier_ok(bond
->dev
)) {
609 netif_carrier_on(bond
->dev
);
617 if (netif_carrier_ok(bond
->dev
)) {
618 netif_carrier_off(bond
->dev
);
625 * Get link speed and duplex from the slave's base driver
626 * using ethtool. If for some reason the call fails or the
627 * values are invalid, fake speed and duplex to 100/Full
630 static int bond_update_speed_duplex(struct slave
*slave
)
632 struct net_device
*slave_dev
= slave
->dev
;
633 struct ethtool_cmd etool
;
636 /* Fake speed and duplex */
637 slave
->speed
= SPEED_100
;
638 slave
->duplex
= DUPLEX_FULL
;
640 if (!slave_dev
->ethtool_ops
|| !slave_dev
->ethtool_ops
->get_settings
)
643 res
= slave_dev
->ethtool_ops
->get_settings(slave_dev
, &etool
);
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
;
693 if (bond
->params
.use_carrier
) {
694 return netif_carrier_ok(slave_dev
) ? BMSR_LSTATUS
: 0;
697 ioctl
= slave_dev
->do_ioctl
;
699 /* TODO: set pointer to correct ioctl on a per team member */
700 /* bases to make this more efficient. that is, once */
701 /* we determine the correct ioctl, we will always */
702 /* call it and not the others for that team */
706 * We cannot assume that SIOCGMIIPHY will also read a
707 * register; not all network drivers (e.g., e100)
711 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
712 strncpy(ifr
.ifr_name
, slave_dev
->name
, IFNAMSIZ
);
714 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIPHY
) == 0) {
715 mii
->reg_num
= MII_BMSR
;
716 if (IOCTL(slave_dev
, &ifr
, SIOCGMIIREG
) == 0) {
717 return (mii
->val_out
& BMSR_LSTATUS
);
723 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
724 * attempt to get link status from it 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 * If reporting, report that either there's no dev->do_ioctl,
738 * or both SIOCGMIIREG and get_link failed (meaning that we
739 * cannot report link status). If not reporting, pretend
742 return (reporting
? -1 : BMSR_LSTATUS
);
745 /*----------------------------- Multicast list ------------------------------*/
748 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
750 static inline int bond_is_dmi_same(struct dev_mc_list
*dmi1
, struct dev_mc_list
*dmi2
)
752 return memcmp(dmi1
->dmi_addr
, dmi2
->dmi_addr
, dmi1
->dmi_addrlen
) == 0 &&
753 dmi1
->dmi_addrlen
== dmi2
->dmi_addrlen
;
757 * returns dmi entry if found, NULL otherwise
759 static struct dev_mc_list
*bond_mc_list_find_dmi(struct dev_mc_list
*dmi
, struct dev_mc_list
*mc_list
)
761 struct dev_mc_list
*idmi
;
763 for (idmi
= mc_list
; idmi
; idmi
= idmi
->next
) {
764 if (bond_is_dmi_same(dmi
, idmi
)) {
773 * Push the promiscuity flag down to appropriate slaves
775 static int bond_set_promiscuity(struct bonding
*bond
, int inc
)
778 if (USES_PRIMARY(bond
->params
.mode
)) {
779 /* write lock already acquired */
780 if (bond
->curr_active_slave
) {
781 err
= dev_set_promiscuity(bond
->curr_active_slave
->dev
,
787 bond_for_each_slave(bond
, slave
, i
) {
788 err
= dev_set_promiscuity(slave
->dev
, inc
);
797 * Push the allmulti flag down to all slaves
799 static int bond_set_allmulti(struct bonding
*bond
, int inc
)
802 if (USES_PRIMARY(bond
->params
.mode
)) {
803 /* write lock already acquired */
804 if (bond
->curr_active_slave
) {
805 err
= dev_set_allmulti(bond
->curr_active_slave
->dev
,
811 bond_for_each_slave(bond
, slave
, i
) {
812 err
= dev_set_allmulti(slave
->dev
, inc
);
821 * Add a Multicast address to slaves
824 static void bond_mc_add(struct bonding
*bond
, void *addr
, int alen
)
826 if (USES_PRIMARY(bond
->params
.mode
)) {
827 /* write lock already acquired */
828 if (bond
->curr_active_slave
) {
829 dev_mc_add(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
834 bond_for_each_slave(bond
, slave
, i
) {
835 dev_mc_add(slave
->dev
, addr
, alen
, 0);
841 * Remove a multicast address from slave
844 static void bond_mc_delete(struct bonding
*bond
, void *addr
, int alen
)
846 if (USES_PRIMARY(bond
->params
.mode
)) {
847 /* write lock already acquired */
848 if (bond
->curr_active_slave
) {
849 dev_mc_delete(bond
->curr_active_slave
->dev
, addr
, alen
, 0);
854 bond_for_each_slave(bond
, slave
, i
) {
855 dev_mc_delete(slave
->dev
, addr
, alen
, 0);
862 * Retrieve the list of registered multicast addresses for the bonding
863 * device and retransmit an IGMP JOIN request to the current active
866 static void bond_resend_igmp_join_requests(struct bonding
*bond
)
868 struct in_device
*in_dev
;
869 struct ip_mc_list
*im
;
872 in_dev
= __in_dev_get_rcu(bond
->dev
);
874 for (im
= in_dev
->mc_list
; im
; im
= im
->next
) {
875 ip_mc_rejoin_group(im
);
883 * Totally destroys the mc_list in bond
885 static void bond_mc_list_destroy(struct bonding
*bond
)
887 struct dev_mc_list
*dmi
;
891 bond
->mc_list
= dmi
->next
;
895 bond
->mc_list
= NULL
;
899 * Copy all the Multicast addresses from src to the bonding device dst
901 static int bond_mc_list_copy(struct dev_mc_list
*mc_list
, struct bonding
*bond
,
904 struct dev_mc_list
*dmi
, *new_dmi
;
906 for (dmi
= mc_list
; dmi
; dmi
= dmi
->next
) {
907 new_dmi
= kmalloc(sizeof(struct dev_mc_list
), gfp_flag
);
910 /* FIXME: Potential memory leak !!! */
914 new_dmi
->next
= bond
->mc_list
;
915 bond
->mc_list
= new_dmi
;
916 new_dmi
->dmi_addrlen
= dmi
->dmi_addrlen
;
917 memcpy(new_dmi
->dmi_addr
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
918 new_dmi
->dmi_users
= dmi
->dmi_users
;
919 new_dmi
->dmi_gusers
= dmi
->dmi_gusers
;
926 * flush all members of flush->mc_list from device dev->mc_list
928 static void bond_mc_list_flush(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
930 struct bonding
*bond
= bond_dev
->priv
;
931 struct dev_mc_list
*dmi
;
933 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
934 dev_mc_delete(slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
937 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
938 /* del lacpdu mc addr from mc list */
939 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
941 dev_mc_delete(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
945 /*--------------------------- Active slave change ---------------------------*/
948 * Update the mc list and multicast-related flags for the new and
949 * old active slaves (if any) according to the multicast mode, and
950 * promiscuous flags unconditionally.
952 static void bond_mc_swap(struct bonding
*bond
, struct slave
*new_active
, struct slave
*old_active
)
954 struct dev_mc_list
*dmi
;
956 if (!USES_PRIMARY(bond
->params
.mode
)) {
957 /* nothing to do - mc list is already up-to-date on
964 if (bond
->dev
->flags
& IFF_PROMISC
) {
965 dev_set_promiscuity(old_active
->dev
, -1);
968 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
969 dev_set_allmulti(old_active
->dev
, -1);
972 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
973 dev_mc_delete(old_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
978 /* FIXME: Signal errors upstream. */
979 if (bond
->dev
->flags
& IFF_PROMISC
) {
980 dev_set_promiscuity(new_active
->dev
, 1);
983 if (bond
->dev
->flags
& IFF_ALLMULTI
) {
984 dev_set_allmulti(new_active
->dev
, 1);
987 for (dmi
= bond
->dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
988 dev_mc_add(new_active
->dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
990 bond_resend_igmp_join_requests(bond
);
995 * bond_do_fail_over_mac
997 * Perform special MAC address swapping for fail_over_mac settings
999 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
1001 static void bond_do_fail_over_mac(struct bonding
*bond
,
1002 struct slave
*new_active
,
1003 struct slave
*old_active
)
1005 u8 tmp_mac
[ETH_ALEN
];
1006 struct sockaddr saddr
;
1009 switch (bond
->params
.fail_over_mac
) {
1010 case BOND_FOM_ACTIVE
:
1012 memcpy(bond
->dev
->dev_addr
, new_active
->dev
->dev_addr
,
1013 new_active
->dev
->addr_len
);
1015 case BOND_FOM_FOLLOW
:
1017 * if new_active && old_active, swap them
1018 * if just old_active, do nothing (going to no active slave)
1019 * if just new_active, set new_active to bond's MAC
1024 write_unlock_bh(&bond
->curr_slave_lock
);
1025 read_unlock(&bond
->lock
);
1028 memcpy(tmp_mac
, new_active
->dev
->dev_addr
, ETH_ALEN
);
1029 memcpy(saddr
.sa_data
, old_active
->dev
->dev_addr
,
1031 saddr
.sa_family
= new_active
->dev
->type
;
1033 memcpy(saddr
.sa_data
, bond
->dev
->dev_addr
, ETH_ALEN
);
1034 saddr
.sa_family
= bond
->dev
->type
;
1037 rv
= dev_set_mac_address(new_active
->dev
, &saddr
);
1039 printk(KERN_ERR DRV_NAME
1040 ": %s: Error %d setting MAC of slave %s\n",
1041 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1048 memcpy(saddr
.sa_data
, tmp_mac
, ETH_ALEN
);
1049 saddr
.sa_family
= old_active
->dev
->type
;
1051 rv
= dev_set_mac_address(old_active
->dev
, &saddr
);
1053 printk(KERN_ERR DRV_NAME
1054 ": %s: Error %d setting MAC of slave %s\n",
1055 bond
->dev
->name
, -rv
, new_active
->dev
->name
);
1057 read_lock(&bond
->lock
);
1058 write_lock_bh(&bond
->curr_slave_lock
);
1061 printk(KERN_ERR DRV_NAME
1062 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1063 bond
->dev
->name
, bond
->params
.fail_over_mac
);
1071 * find_best_interface - select the best available slave to be the active one
1072 * @bond: our bonding struct
1074 * Warning: Caller must hold curr_slave_lock for writing.
1076 static struct slave
*bond_find_best_slave(struct bonding
*bond
)
1078 struct slave
*new_active
, *old_active
;
1079 struct slave
*bestslave
= NULL
;
1080 int mintime
= bond
->params
.updelay
;
1083 new_active
= old_active
= bond
->curr_active_slave
;
1085 if (!new_active
) { /* there were no active slaves left */
1086 if (bond
->slave_cnt
> 0) { /* found one slave */
1087 new_active
= bond
->first_slave
;
1089 return NULL
; /* still no slave, return NULL */
1093 /* first try the primary link; if arping, a link must tx/rx traffic
1094 * before it can be considered the curr_active_slave - also, we would skip
1095 * slaves between the curr_active_slave and primary_slave that may be up
1098 if ((bond
->primary_slave
) &&
1099 (!bond
->params
.arp_interval
) &&
1100 (IS_UP(bond
->primary_slave
->dev
))) {
1101 new_active
= bond
->primary_slave
;
1104 /* remember where to stop iterating over the slaves */
1105 old_active
= new_active
;
1107 bond_for_each_slave_from(bond
, new_active
, i
, old_active
) {
1108 if (IS_UP(new_active
->dev
)) {
1109 if (new_active
->link
== BOND_LINK_UP
) {
1111 } else if (new_active
->link
== BOND_LINK_BACK
) {
1112 /* link up, but waiting for stabilization */
1113 if (new_active
->delay
< mintime
) {
1114 mintime
= new_active
->delay
;
1115 bestslave
= new_active
;
1125 * change_active_interface - change the active slave into the specified one
1126 * @bond: our bonding struct
1127 * @new: the new slave to make the active one
1129 * Set the new slave to the bond's settings and unset them on the old
1130 * curr_active_slave.
1131 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1133 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1134 * because it is apparently the best available slave we have, even though its
1135 * updelay hasn't timed out yet.
1137 * If new_active is not NULL, caller must hold bond->lock for read and
1138 * curr_slave_lock for write_bh.
1140 void bond_change_active_slave(struct bonding
*bond
, struct slave
*new_active
)
1142 struct slave
*old_active
= bond
->curr_active_slave
;
1144 if (old_active
== new_active
) {
1149 new_active
->jiffies
= jiffies
;
1151 if (new_active
->link
== BOND_LINK_BACK
) {
1152 if (USES_PRIMARY(bond
->params
.mode
)) {
1153 printk(KERN_INFO DRV_NAME
1154 ": %s: making interface %s the new "
1155 "active one %d ms earlier.\n",
1156 bond
->dev
->name
, new_active
->dev
->name
,
1157 (bond
->params
.updelay
- new_active
->delay
) * bond
->params
.miimon
);
1160 new_active
->delay
= 0;
1161 new_active
->link
= BOND_LINK_UP
;
1163 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1164 bond_3ad_handle_link_change(new_active
, BOND_LINK_UP
);
1167 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1168 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1169 bond_alb_handle_link_change(bond
, new_active
, BOND_LINK_UP
);
1172 if (USES_PRIMARY(bond
->params
.mode
)) {
1173 printk(KERN_INFO DRV_NAME
1174 ": %s: making interface %s the new "
1176 bond
->dev
->name
, new_active
->dev
->name
);
1181 if (USES_PRIMARY(bond
->params
.mode
)) {
1182 bond_mc_swap(bond
, new_active
, old_active
);
1185 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1186 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1187 bond_alb_handle_active_change(bond
, new_active
);
1189 bond_set_slave_inactive_flags(old_active
);
1191 bond_set_slave_active_flags(new_active
);
1193 bond
->curr_active_slave
= new_active
;
1196 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) {
1198 bond_set_slave_inactive_flags(old_active
);
1202 bond_set_slave_active_flags(new_active
);
1204 if (bond
->params
.fail_over_mac
)
1205 bond_do_fail_over_mac(bond
, new_active
,
1208 bond
->send_grat_arp
= bond
->params
.num_grat_arp
;
1209 bond_send_gratuitous_arp(bond
);
1211 write_unlock_bh(&bond
->curr_slave_lock
);
1212 read_unlock(&bond
->lock
);
1214 netdev_bonding_change(bond
->dev
);
1216 read_lock(&bond
->lock
);
1217 write_lock_bh(&bond
->curr_slave_lock
);
1223 * bond_select_active_slave - select a new active slave, if needed
1224 * @bond: our bonding struct
1226 * This functions shoud be called when one of the following occurs:
1227 * - The old curr_active_slave has been released or lost its link.
1228 * - The primary_slave has got its link back.
1229 * - A slave has got its link back and there's no old curr_active_slave.
1231 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1233 void bond_select_active_slave(struct bonding
*bond
)
1235 struct slave
*best_slave
;
1238 best_slave
= bond_find_best_slave(bond
);
1239 if (best_slave
!= bond
->curr_active_slave
) {
1240 bond_change_active_slave(bond
, best_slave
);
1241 rv
= bond_set_carrier(bond
);
1245 if (netif_carrier_ok(bond
->dev
)) {
1246 printk(KERN_INFO DRV_NAME
1247 ": %s: first active interface up!\n",
1250 printk(KERN_INFO DRV_NAME
": %s: "
1251 "now running without any active interface !\n",
1257 /*--------------------------- slave list handling ---------------------------*/
1260 * This function attaches the slave to the end of list.
1262 * bond->lock held for writing by caller.
1264 static void bond_attach_slave(struct bonding
*bond
, struct slave
*new_slave
)
1266 if (bond
->first_slave
== NULL
) { /* attaching the first slave */
1267 new_slave
->next
= new_slave
;
1268 new_slave
->prev
= new_slave
;
1269 bond
->first_slave
= new_slave
;
1271 new_slave
->next
= bond
->first_slave
;
1272 new_slave
->prev
= bond
->first_slave
->prev
;
1273 new_slave
->next
->prev
= new_slave
;
1274 new_slave
->prev
->next
= new_slave
;
1281 * This function detaches the slave from the list.
1282 * WARNING: no check is made to verify if the slave effectively
1283 * belongs to <bond>.
1284 * Nothing is freed on return, structures are just unchained.
1285 * If any slave pointer in bond was pointing to <slave>,
1286 * it should be changed by the calling function.
1288 * bond->lock held for writing by caller.
1290 static void bond_detach_slave(struct bonding
*bond
, struct slave
*slave
)
1293 slave
->next
->prev
= slave
->prev
;
1297 slave
->prev
->next
= slave
->next
;
1300 if (bond
->first_slave
== slave
) { /* slave is the first slave */
1301 if (bond
->slave_cnt
> 1) { /* there are more slave */
1302 bond
->first_slave
= slave
->next
;
1304 bond
->first_slave
= NULL
; /* slave was the last one */
1313 /*---------------------------------- IOCTL ----------------------------------*/
1315 static int bond_sethwaddr(struct net_device
*bond_dev
,
1316 struct net_device
*slave_dev
)
1318 dprintk("bond_dev=%p\n", bond_dev
);
1319 dprintk("slave_dev=%p\n", slave_dev
);
1320 dprintk("slave_dev->addr_len=%d\n", slave_dev
->addr_len
);
1321 memcpy(bond_dev
->dev_addr
, slave_dev
->dev_addr
, slave_dev
->addr_len
);
1325 #define BOND_VLAN_FEATURES \
1326 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1327 NETIF_F_HW_VLAN_FILTER)
1330 * Compute the common dev->feature set available to all slaves. Some
1331 * feature bits are managed elsewhere, so preserve those feature bits
1332 * on the master device.
1334 static int bond_compute_features(struct bonding
*bond
)
1336 struct slave
*slave
;
1337 struct net_device
*bond_dev
= bond
->dev
;
1338 unsigned long features
= bond_dev
->features
;
1339 unsigned short max_hard_header_len
= max((u16
)ETH_HLEN
,
1340 bond_dev
->hard_header_len
);
1343 features
&= ~(NETIF_F_ALL_CSUM
| BOND_VLAN_FEATURES
);
1344 features
|= NETIF_F_SG
| NETIF_F_FRAGLIST
| NETIF_F_HIGHDMA
|
1345 NETIF_F_GSO_MASK
| NETIF_F_NO_CSUM
;
1347 bond_for_each_slave(bond
, slave
, i
) {
1348 features
= netdev_compute_features(features
,
1349 slave
->dev
->features
);
1350 if (slave
->dev
->hard_header_len
> max_hard_header_len
)
1351 max_hard_header_len
= slave
->dev
->hard_header_len
;
1354 features
|= (bond_dev
->features
& BOND_VLAN_FEATURES
);
1355 bond_dev
->features
= features
;
1356 bond_dev
->hard_header_len
= max_hard_header_len
;
1362 static void bond_setup_by_slave(struct net_device
*bond_dev
,
1363 struct net_device
*slave_dev
)
1365 struct bonding
*bond
= bond_dev
->priv
;
1367 bond_dev
->neigh_setup
= slave_dev
->neigh_setup
;
1368 bond_dev
->header_ops
= slave_dev
->header_ops
;
1370 bond_dev
->type
= slave_dev
->type
;
1371 bond_dev
->hard_header_len
= slave_dev
->hard_header_len
;
1372 bond_dev
->addr_len
= slave_dev
->addr_len
;
1374 memcpy(bond_dev
->broadcast
, slave_dev
->broadcast
,
1375 slave_dev
->addr_len
);
1376 bond
->setup_by_slave
= 1;
1379 /* enslave device <slave> to bond device <master> */
1380 int bond_enslave(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1382 struct bonding
*bond
= bond_dev
->priv
;
1383 struct slave
*new_slave
= NULL
;
1384 struct dev_mc_list
*dmi
;
1385 struct sockaddr addr
;
1387 int old_features
= bond_dev
->features
;
1390 if (!bond
->params
.use_carrier
&& slave_dev
->ethtool_ops
== NULL
&&
1391 slave_dev
->do_ioctl
== NULL
) {
1392 printk(KERN_WARNING DRV_NAME
1393 ": %s: Warning: no link monitoring support for %s\n",
1394 bond_dev
->name
, slave_dev
->name
);
1397 /* bond must be initialized by bond_open() before enslaving */
1398 if (!(bond_dev
->flags
& IFF_UP
)) {
1399 printk(KERN_WARNING DRV_NAME
1400 " %s: master_dev is not up in bond_enslave\n",
1404 /* already enslaved */
1405 if (slave_dev
->flags
& IFF_SLAVE
) {
1406 dprintk("Error, Device was already enslaved\n");
1410 /* vlan challenged mutual exclusion */
1411 /* no need to lock since we're protected by rtnl_lock */
1412 if (slave_dev
->features
& NETIF_F_VLAN_CHALLENGED
) {
1413 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1414 if (!list_empty(&bond
->vlan_list
)) {
1415 printk(KERN_ERR DRV_NAME
1416 ": %s: Error: cannot enslave VLAN "
1417 "challenged slave %s on VLAN enabled "
1418 "bond %s\n", bond_dev
->name
, slave_dev
->name
,
1422 printk(KERN_WARNING DRV_NAME
1423 ": %s: Warning: enslaved VLAN challenged "
1424 "slave %s. Adding VLANs will be blocked as "
1425 "long as %s is part of bond %s\n",
1426 bond_dev
->name
, slave_dev
->name
, slave_dev
->name
,
1428 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1431 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev
->name
);
1432 if (bond
->slave_cnt
== 0) {
1433 /* First slave, and it is not VLAN challenged,
1434 * so remove the block of adding VLANs over the bond.
1436 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1441 * Old ifenslave binaries are no longer supported. These can
1442 * be identified with moderate accurary by the state of the slave:
1443 * the current ifenslave will set the interface down prior to
1444 * enslaving it; the old ifenslave will not.
1446 if ((slave_dev
->flags
& IFF_UP
)) {
1447 printk(KERN_ERR DRV_NAME
": %s is up. "
1448 "This may be due to an out of date ifenslave.\n",
1451 goto err_undo_flags
;
1454 /* set bonding device ether type by slave - bonding netdevices are
1455 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1456 * there is a need to override some of the type dependent attribs/funcs.
1458 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1459 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1461 if (bond
->slave_cnt
== 0) {
1462 if (slave_dev
->type
!= ARPHRD_ETHER
)
1463 bond_setup_by_slave(bond_dev
, slave_dev
);
1464 } else if (bond_dev
->type
!= slave_dev
->type
) {
1465 printk(KERN_ERR DRV_NAME
": %s ether type (%d) is different "
1466 "from other slaves (%d), can not enslave it.\n",
1468 slave_dev
->type
, bond_dev
->type
);
1470 goto err_undo_flags
;
1473 if (slave_dev
->set_mac_address
== NULL
) {
1474 if (bond
->slave_cnt
== 0) {
1475 printk(KERN_WARNING DRV_NAME
1476 ": %s: Warning: The first slave device "
1477 "specified does not support setting the MAC "
1478 "address. Setting fail_over_mac to active.",
1480 bond
->params
.fail_over_mac
= BOND_FOM_ACTIVE
;
1481 } else if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1482 printk(KERN_ERR DRV_NAME
1483 ": %s: Error: The slave device specified "
1484 "does not support setting the MAC address, "
1485 "but fail_over_mac is not set to active.\n"
1488 goto err_undo_flags
;
1492 new_slave
= kzalloc(sizeof(struct slave
), GFP_KERNEL
);
1495 goto err_undo_flags
;
1498 /* save slave's original flags before calling
1499 * netdev_set_master and dev_open
1501 new_slave
->original_flags
= slave_dev
->flags
;
1504 * Save slave's original ("permanent") mac address for modes
1505 * that need it, and for restoring it upon release, and then
1506 * set it to the master's address
1508 memcpy(new_slave
->perm_hwaddr
, slave_dev
->dev_addr
, ETH_ALEN
);
1510 if (!bond
->params
.fail_over_mac
) {
1512 * Set slave to master's mac address. The application already
1513 * set the master's mac address to that of the first slave
1515 memcpy(addr
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
1516 addr
.sa_family
= slave_dev
->type
;
1517 res
= dev_set_mac_address(slave_dev
, &addr
);
1519 dprintk("Error %d calling set_mac_address\n", res
);
1524 res
= netdev_set_master(slave_dev
, bond_dev
);
1526 dprintk("Error %d calling netdev_set_master\n", res
);
1527 goto err_restore_mac
;
1529 /* open the slave since the application closed it */
1530 res
= dev_open(slave_dev
);
1532 dprintk("Openning slave %s failed\n", slave_dev
->name
);
1533 goto err_unset_master
;
1536 new_slave
->dev
= slave_dev
;
1537 slave_dev
->priv_flags
|= IFF_BONDING
;
1539 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1540 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1541 /* bond_alb_init_slave() must be called before all other stages since
1542 * it might fail and we do not want to have to undo everything
1544 res
= bond_alb_init_slave(bond
, new_slave
);
1550 /* If the mode USES_PRIMARY, then the new slave gets the
1551 * master's promisc (and mc) settings only if it becomes the
1552 * curr_active_slave, and that is taken care of later when calling
1553 * bond_change_active()
1555 if (!USES_PRIMARY(bond
->params
.mode
)) {
1556 /* set promiscuity level to new slave */
1557 if (bond_dev
->flags
& IFF_PROMISC
) {
1558 res
= dev_set_promiscuity(slave_dev
, 1);
1563 /* set allmulti level to new slave */
1564 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1565 res
= dev_set_allmulti(slave_dev
, 1);
1570 netif_addr_lock_bh(bond_dev
);
1571 /* upload master's mc_list to new slave */
1572 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
1573 dev_mc_add (slave_dev
, dmi
->dmi_addr
, dmi
->dmi_addrlen
, 0);
1575 netif_addr_unlock_bh(bond_dev
);
1578 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1579 /* add lacpdu mc addr to mc list */
1580 u8 lacpdu_multicast
[ETH_ALEN
] = MULTICAST_LACPDU_ADDR
;
1582 dev_mc_add(slave_dev
, lacpdu_multicast
, ETH_ALEN
, 0);
1585 bond_add_vlans_on_slave(bond
, slave_dev
);
1587 write_lock_bh(&bond
->lock
);
1589 bond_attach_slave(bond
, new_slave
);
1591 new_slave
->delay
= 0;
1592 new_slave
->link_failure_count
= 0;
1594 bond_compute_features(bond
);
1596 write_unlock_bh(&bond
->lock
);
1598 read_lock(&bond
->lock
);
1600 new_slave
->last_arp_rx
= jiffies
;
1602 if (bond
->params
.miimon
&& !bond
->params
.use_carrier
) {
1603 link_reporting
= bond_check_dev_link(bond
, slave_dev
, 1);
1605 if ((link_reporting
== -1) && !bond
->params
.arp_interval
) {
1607 * miimon is set but a bonded network driver
1608 * does not support ETHTOOL/MII and
1609 * arp_interval is not set. Note: if
1610 * use_carrier is enabled, we will never go
1611 * here (because netif_carrier is always
1612 * supported); thus, we don't need to change
1613 * the messages for netif_carrier.
1615 printk(KERN_WARNING DRV_NAME
1616 ": %s: Warning: MII and ETHTOOL support not "
1617 "available for interface %s, and "
1618 "arp_interval/arp_ip_target module parameters "
1619 "not specified, thus bonding will not detect "
1620 "link failures! see bonding.txt for details.\n",
1621 bond_dev
->name
, slave_dev
->name
);
1622 } else if (link_reporting
== -1) {
1623 /* unable get link status using mii/ethtool */
1624 printk(KERN_WARNING DRV_NAME
1625 ": %s: Warning: can't get link status from "
1626 "interface %s; the network driver associated "
1627 "with this interface does not support MII or "
1628 "ETHTOOL link status reporting, thus miimon "
1629 "has no effect on this interface.\n",
1630 bond_dev
->name
, slave_dev
->name
);
1634 /* check for initial state */
1635 if (!bond
->params
.miimon
||
1636 (bond_check_dev_link(bond
, slave_dev
, 0) == BMSR_LSTATUS
)) {
1637 if (bond
->params
.updelay
) {
1638 dprintk("Initial state of slave_dev is "
1639 "BOND_LINK_BACK\n");
1640 new_slave
->link
= BOND_LINK_BACK
;
1641 new_slave
->delay
= bond
->params
.updelay
;
1643 dprintk("Initial state of slave_dev is "
1645 new_slave
->link
= BOND_LINK_UP
;
1647 new_slave
->jiffies
= jiffies
;
1649 dprintk("Initial state of slave_dev is "
1650 "BOND_LINK_DOWN\n");
1651 new_slave
->link
= BOND_LINK_DOWN
;
1654 if (bond_update_speed_duplex(new_slave
) &&
1655 (new_slave
->link
!= BOND_LINK_DOWN
)) {
1656 printk(KERN_WARNING DRV_NAME
1657 ": %s: Warning: failed to get speed and duplex from %s, "
1658 "assumed to be 100Mb/sec and Full.\n",
1659 bond_dev
->name
, new_slave
->dev
->name
);
1661 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1662 printk(KERN_WARNING DRV_NAME
1663 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1664 "support in base driver for proper aggregator "
1665 "selection.\n", bond_dev
->name
);
1669 if (USES_PRIMARY(bond
->params
.mode
) && bond
->params
.primary
[0]) {
1670 /* if there is a primary slave, remember it */
1671 if (strcmp(bond
->params
.primary
, new_slave
->dev
->name
) == 0) {
1672 bond
->primary_slave
= new_slave
;
1676 write_lock_bh(&bond
->curr_slave_lock
);
1678 switch (bond
->params
.mode
) {
1679 case BOND_MODE_ACTIVEBACKUP
:
1680 bond_set_slave_inactive_flags(new_slave
);
1681 bond_select_active_slave(bond
);
1683 case BOND_MODE_8023AD
:
1684 /* in 802.3ad mode, the internal mechanism
1685 * will activate the slaves in the selected
1688 bond_set_slave_inactive_flags(new_slave
);
1689 /* if this is the first slave */
1690 if (bond
->slave_cnt
== 1) {
1691 SLAVE_AD_INFO(new_slave
).id
= 1;
1692 /* Initialize AD with the number of times that the AD timer is called in 1 second
1693 * can be called only after the mac address of the bond is set
1695 bond_3ad_initialize(bond
, 1000/AD_TIMER_INTERVAL
,
1696 bond
->params
.lacp_fast
);
1698 SLAVE_AD_INFO(new_slave
).id
=
1699 SLAVE_AD_INFO(new_slave
->prev
).id
+ 1;
1702 bond_3ad_bind_slave(new_slave
);
1706 new_slave
->state
= BOND_STATE_ACTIVE
;
1707 bond_set_slave_inactive_flags(new_slave
);
1710 dprintk("This slave is always active in trunk mode\n");
1712 /* always active in trunk mode */
1713 new_slave
->state
= BOND_STATE_ACTIVE
;
1715 /* In trunking mode there is little meaning to curr_active_slave
1716 * anyway (it holds no special properties of the bond device),
1717 * so we can change it without calling change_active_interface()
1719 if (!bond
->curr_active_slave
) {
1720 bond
->curr_active_slave
= new_slave
;
1723 } /* switch(bond_mode) */
1725 write_unlock_bh(&bond
->curr_slave_lock
);
1727 bond_set_carrier(bond
);
1729 read_unlock(&bond
->lock
);
1731 res
= bond_create_slave_symlinks(bond_dev
, slave_dev
);
1735 printk(KERN_INFO DRV_NAME
1736 ": %s: enslaving %s as a%s interface with a%s link.\n",
1737 bond_dev
->name
, slave_dev
->name
,
1738 new_slave
->state
== BOND_STATE_ACTIVE
? "n active" : " backup",
1739 new_slave
->link
!= BOND_LINK_DOWN
? "n up" : " down");
1741 /* enslave is successful */
1744 /* Undo stages on error */
1746 dev_close(slave_dev
);
1749 netdev_set_master(slave_dev
, NULL
);
1752 if (!bond
->params
.fail_over_mac
) {
1753 /* XXX TODO - fom follow mode needs to change master's
1754 * MAC if this slave's MAC is in use by the bond, or at
1755 * least print a warning.
1757 memcpy(addr
.sa_data
, new_slave
->perm_hwaddr
, ETH_ALEN
);
1758 addr
.sa_family
= slave_dev
->type
;
1759 dev_set_mac_address(slave_dev
, &addr
);
1766 bond_dev
->features
= old_features
;
1772 * Try to release the slave device <slave> from the bond device <master>
1773 * It is legal to access curr_active_slave without a lock because all the function
1776 * The rules for slave state should be:
1777 * for Active/Backup:
1778 * Active stays on all backups go down
1779 * for Bonded connections:
1780 * The first up interface should be left on and all others downed.
1782 int bond_release(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1784 struct bonding
*bond
= bond_dev
->priv
;
1785 struct slave
*slave
, *oldcurrent
;
1786 struct sockaddr addr
;
1787 int mac_addr_differ
;
1788 DECLARE_MAC_BUF(mac
);
1790 /* slave is not a slave or master is not master of this slave */
1791 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
1792 (slave_dev
->master
!= bond_dev
)) {
1793 printk(KERN_ERR DRV_NAME
1794 ": %s: Error: cannot release %s.\n",
1795 bond_dev
->name
, slave_dev
->name
);
1799 write_lock_bh(&bond
->lock
);
1801 slave
= bond_get_slave_by_dev(bond
, slave_dev
);
1803 /* not a slave of this bond */
1804 printk(KERN_INFO DRV_NAME
1805 ": %s: %s not enslaved\n",
1806 bond_dev
->name
, slave_dev
->name
);
1807 write_unlock_bh(&bond
->lock
);
1811 if (!bond
->params
.fail_over_mac
) {
1812 mac_addr_differ
= memcmp(bond_dev
->dev_addr
, slave
->perm_hwaddr
,
1814 if (!mac_addr_differ
&& (bond
->slave_cnt
> 1))
1815 printk(KERN_WARNING DRV_NAME
1816 ": %s: Warning: the permanent HWaddr of %s - "
1817 "%s - is still in use by %s. "
1818 "Set the HWaddr of %s to a different address "
1819 "to avoid conflicts.\n",
1820 bond_dev
->name
, slave_dev
->name
,
1821 print_mac(mac
, slave
->perm_hwaddr
),
1822 bond_dev
->name
, slave_dev
->name
);
1825 /* Inform AD package of unbinding of slave. */
1826 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
1827 /* must be called before the slave is
1828 * detached from the list
1830 bond_3ad_unbind_slave(slave
);
1833 printk(KERN_INFO DRV_NAME
1834 ": %s: releasing %s interface %s\n",
1836 (slave
->state
== BOND_STATE_ACTIVE
)
1837 ? "active" : "backup",
1840 oldcurrent
= bond
->curr_active_slave
;
1842 bond
->current_arp_slave
= NULL
;
1844 /* release the slave from its bond */
1845 bond_detach_slave(bond
, slave
);
1847 bond_compute_features(bond
);
1849 if (bond
->primary_slave
== slave
) {
1850 bond
->primary_slave
= NULL
;
1853 if (oldcurrent
== slave
) {
1854 bond_change_active_slave(bond
, NULL
);
1857 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
1858 (bond
->params
.mode
== BOND_MODE_ALB
)) {
1859 /* Must be called only after the slave has been
1860 * detached from the list and the curr_active_slave
1861 * has been cleared (if our_slave == old_current),
1862 * but before a new active slave is selected.
1864 write_unlock_bh(&bond
->lock
);
1865 bond_alb_deinit_slave(bond
, slave
);
1866 write_lock_bh(&bond
->lock
);
1869 if (oldcurrent
== slave
) {
1871 * Note that we hold RTNL over this sequence, so there
1872 * is no concern that another slave add/remove event
1875 write_unlock_bh(&bond
->lock
);
1876 read_lock(&bond
->lock
);
1877 write_lock_bh(&bond
->curr_slave_lock
);
1879 bond_select_active_slave(bond
);
1881 write_unlock_bh(&bond
->curr_slave_lock
);
1882 read_unlock(&bond
->lock
);
1883 write_lock_bh(&bond
->lock
);
1886 if (bond
->slave_cnt
== 0) {
1887 bond_set_carrier(bond
);
1889 /* if the last slave was removed, zero the mac address
1890 * of the master so it will be set by the application
1891 * to the mac address of the first slave
1893 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
1895 if (list_empty(&bond
->vlan_list
)) {
1896 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
1898 printk(KERN_WARNING DRV_NAME
1899 ": %s: Warning: clearing HW address of %s while it "
1900 "still has VLANs.\n",
1901 bond_dev
->name
, bond_dev
->name
);
1902 printk(KERN_WARNING DRV_NAME
1903 ": %s: When re-adding slaves, make sure the bond's "
1904 "HW address matches its VLANs'.\n",
1907 } else if ((bond_dev
->features
& NETIF_F_VLAN_CHALLENGED
) &&
1908 !bond_has_challenged_slaves(bond
)) {
1909 printk(KERN_INFO DRV_NAME
1910 ": %s: last VLAN challenged slave %s "
1911 "left bond %s. VLAN blocking is removed\n",
1912 bond_dev
->name
, slave_dev
->name
, bond_dev
->name
);
1913 bond_dev
->features
&= ~NETIF_F_VLAN_CHALLENGED
;
1916 write_unlock_bh(&bond
->lock
);
1918 /* must do this from outside any spinlocks */
1919 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
1921 bond_del_vlans_from_slave(bond
, slave_dev
);
1923 /* If the mode USES_PRIMARY, then we should only remove its
1924 * promisc and mc settings if it was the curr_active_slave, but that was
1925 * already taken care of above when we detached the slave
1927 if (!USES_PRIMARY(bond
->params
.mode
)) {
1928 /* unset promiscuity level from slave */
1929 if (bond_dev
->flags
& IFF_PROMISC
) {
1930 dev_set_promiscuity(slave_dev
, -1);
1933 /* unset allmulti level from slave */
1934 if (bond_dev
->flags
& IFF_ALLMULTI
) {
1935 dev_set_allmulti(slave_dev
, -1);
1938 /* flush master's mc_list from slave */
1939 netif_addr_lock_bh(bond_dev
);
1940 bond_mc_list_flush(bond_dev
, slave_dev
);
1941 netif_addr_unlock_bh(bond_dev
);
1944 netdev_set_master(slave_dev
, NULL
);
1946 /* close slave before restoring its mac address */
1947 dev_close(slave_dev
);
1949 if (bond
->params
.fail_over_mac
!= BOND_FOM_ACTIVE
) {
1950 /* restore original ("permanent") mac address */
1951 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
1952 addr
.sa_family
= slave_dev
->type
;
1953 dev_set_mac_address(slave_dev
, &addr
);
1956 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
1957 IFF_SLAVE_INACTIVE
| IFF_BONDING
|
1962 return 0; /* deletion OK */
1966 * Destroy a bonding device.
1967 * Must be under rtnl_lock when this function is called.
1969 void bond_destroy(struct bonding
*bond
)
1971 bond_deinit(bond
->dev
);
1972 bond_destroy_sysfs_entry(bond
);
1973 unregister_netdevice(bond
->dev
);
1977 * First release a slave and than destroy the bond if no more slaves iare left.
1978 * Must be under rtnl_lock when this function is called.
1980 int bond_release_and_destroy(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
1982 struct bonding
*bond
= bond_dev
->priv
;
1985 ret
= bond_release(bond_dev
, slave_dev
);
1986 if ((ret
== 0) && (bond
->slave_cnt
== 0)) {
1987 printk(KERN_INFO DRV_NAME
": %s: destroying bond %s.\n",
1988 bond_dev
->name
, bond_dev
->name
);
1995 * This function releases all slaves.
1997 static int bond_release_all(struct net_device
*bond_dev
)
1999 struct bonding
*bond
= bond_dev
->priv
;
2000 struct slave
*slave
;
2001 struct net_device
*slave_dev
;
2002 struct sockaddr addr
;
2004 write_lock_bh(&bond
->lock
);
2006 netif_carrier_off(bond_dev
);
2008 if (bond
->slave_cnt
== 0) {
2012 bond
->current_arp_slave
= NULL
;
2013 bond
->primary_slave
= NULL
;
2014 bond_change_active_slave(bond
, NULL
);
2016 while ((slave
= bond
->first_slave
) != NULL
) {
2017 /* Inform AD package of unbinding of slave
2018 * before slave is detached from the list.
2020 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2021 bond_3ad_unbind_slave(slave
);
2024 slave_dev
= slave
->dev
;
2025 bond_detach_slave(bond
, slave
);
2027 /* now that the slave is detached, unlock and perform
2028 * all the undo steps that should not be called from
2031 write_unlock_bh(&bond
->lock
);
2033 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2034 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2035 /* must be called only after the slave
2036 * has been detached from the list
2038 bond_alb_deinit_slave(bond
, slave
);
2041 bond_compute_features(bond
);
2043 bond_destroy_slave_symlinks(bond_dev
, slave_dev
);
2044 bond_del_vlans_from_slave(bond
, slave_dev
);
2046 /* If the mode USES_PRIMARY, then we should only remove its
2047 * promisc and mc settings if it was the curr_active_slave, but that was
2048 * already taken care of above when we detached the slave
2050 if (!USES_PRIMARY(bond
->params
.mode
)) {
2051 /* unset promiscuity level from slave */
2052 if (bond_dev
->flags
& IFF_PROMISC
) {
2053 dev_set_promiscuity(slave_dev
, -1);
2056 /* unset allmulti level from slave */
2057 if (bond_dev
->flags
& IFF_ALLMULTI
) {
2058 dev_set_allmulti(slave_dev
, -1);
2061 /* flush master's mc_list from slave */
2062 netif_addr_lock_bh(bond_dev
);
2063 bond_mc_list_flush(bond_dev
, slave_dev
);
2064 netif_addr_unlock_bh(bond_dev
);
2067 netdev_set_master(slave_dev
, NULL
);
2069 /* close slave before restoring its mac address */
2070 dev_close(slave_dev
);
2072 if (!bond
->params
.fail_over_mac
) {
2073 /* restore original ("permanent") mac address*/
2074 memcpy(addr
.sa_data
, slave
->perm_hwaddr
, ETH_ALEN
);
2075 addr
.sa_family
= slave_dev
->type
;
2076 dev_set_mac_address(slave_dev
, &addr
);
2079 slave_dev
->priv_flags
&= ~(IFF_MASTER_8023AD
| IFF_MASTER_ALB
|
2080 IFF_SLAVE_INACTIVE
);
2084 /* re-acquire the lock before getting the next slave */
2085 write_lock_bh(&bond
->lock
);
2088 /* zero the mac address of the master so it will be
2089 * set by the application to the mac address of the
2092 memset(bond_dev
->dev_addr
, 0, bond_dev
->addr_len
);
2094 if (list_empty(&bond
->vlan_list
)) {
2095 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
2097 printk(KERN_WARNING DRV_NAME
2098 ": %s: Warning: clearing HW address of %s while it "
2099 "still has VLANs.\n",
2100 bond_dev
->name
, bond_dev
->name
);
2101 printk(KERN_WARNING DRV_NAME
2102 ": %s: When re-adding slaves, make sure the bond's "
2103 "HW address matches its VLANs'.\n",
2107 printk(KERN_INFO DRV_NAME
2108 ": %s: released all slaves\n",
2112 write_unlock_bh(&bond
->lock
);
2118 * This function changes the active slave to slave <slave_dev>.
2119 * It returns -EINVAL in the following cases.
2120 * - <slave_dev> is not found in the list.
2121 * - There is not active slave now.
2122 * - <slave_dev> is already active.
2123 * - The link state of <slave_dev> is not BOND_LINK_UP.
2124 * - <slave_dev> is not running.
2125 * In these cases, this fuction does nothing.
2126 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2128 static int bond_ioctl_change_active(struct net_device
*bond_dev
, struct net_device
*slave_dev
)
2130 struct bonding
*bond
= bond_dev
->priv
;
2131 struct slave
*old_active
= NULL
;
2132 struct slave
*new_active
= NULL
;
2135 if (!USES_PRIMARY(bond
->params
.mode
)) {
2139 /* Verify that master_dev is indeed the master of slave_dev */
2140 if (!(slave_dev
->flags
& IFF_SLAVE
) ||
2141 (slave_dev
->master
!= bond_dev
)) {
2145 read_lock(&bond
->lock
);
2147 read_lock(&bond
->curr_slave_lock
);
2148 old_active
= bond
->curr_active_slave
;
2149 read_unlock(&bond
->curr_slave_lock
);
2151 new_active
= bond_get_slave_by_dev(bond
, slave_dev
);
2154 * Changing to the current active: do nothing; return success.
2156 if (new_active
&& (new_active
== old_active
)) {
2157 read_unlock(&bond
->lock
);
2163 (new_active
->link
== BOND_LINK_UP
) &&
2164 IS_UP(new_active
->dev
)) {
2165 write_lock_bh(&bond
->curr_slave_lock
);
2166 bond_change_active_slave(bond
, new_active
);
2167 write_unlock_bh(&bond
->curr_slave_lock
);
2172 read_unlock(&bond
->lock
);
2177 static int bond_info_query(struct net_device
*bond_dev
, struct ifbond
*info
)
2179 struct bonding
*bond
= bond_dev
->priv
;
2181 info
->bond_mode
= bond
->params
.mode
;
2182 info
->miimon
= bond
->params
.miimon
;
2184 read_lock(&bond
->lock
);
2185 info
->num_slaves
= bond
->slave_cnt
;
2186 read_unlock(&bond
->lock
);
2191 static int bond_slave_info_query(struct net_device
*bond_dev
, struct ifslave
*info
)
2193 struct bonding
*bond
= bond_dev
->priv
;
2194 struct slave
*slave
;
2197 if (info
->slave_id
< 0) {
2201 read_lock(&bond
->lock
);
2203 bond_for_each_slave(bond
, slave
, i
) {
2204 if (i
== (int)info
->slave_id
) {
2210 read_unlock(&bond
->lock
);
2213 strcpy(info
->slave_name
, slave
->dev
->name
);
2214 info
->link
= slave
->link
;
2215 info
->state
= slave
->state
;
2216 info
->link_failure_count
= slave
->link_failure_count
;
2224 /*-------------------------------- Monitoring -------------------------------*/
2227 * if !have_locks, return nonzero if a failover is necessary. if
2228 * have_locks, do whatever failover activities are needed.
2230 * This is to separate the inspection and failover steps for locking
2231 * purposes; failover requires rtnl, but acquiring it for every
2232 * inspection is undesirable, so a wrapper first does inspection, and
2233 * the acquires the necessary locks and calls again to perform
2234 * failover if needed. Since all locks are dropped, a complete
2235 * restart is needed between calls.
2237 static int __bond_mii_monitor(struct bonding
*bond
, int have_locks
)
2239 struct slave
*slave
, *oldcurrent
;
2240 int do_failover
= 0;
2243 if (bond
->slave_cnt
== 0)
2246 /* we will try to read the link status of each of our slaves, and
2247 * set their IFF_RUNNING flag appropriately. For each slave not
2248 * supporting MII status, we won't do anything so that a user-space
2249 * program could monitor the link itself if needed.
2252 read_lock(&bond
->curr_slave_lock
);
2253 oldcurrent
= bond
->curr_active_slave
;
2254 read_unlock(&bond
->curr_slave_lock
);
2256 bond_for_each_slave(bond
, slave
, i
) {
2257 struct net_device
*slave_dev
= slave
->dev
;
2259 u16 old_speed
= slave
->speed
;
2260 u8 old_duplex
= slave
->duplex
;
2262 link_state
= bond_check_dev_link(bond
, slave_dev
, 0);
2264 switch (slave
->link
) {
2265 case BOND_LINK_UP
: /* the link was up */
2266 if (link_state
== BMSR_LSTATUS
) {
2273 } else { /* link going down */
2274 slave
->link
= BOND_LINK_FAIL
;
2275 slave
->delay
= bond
->params
.downdelay
;
2277 if (slave
->link_failure_count
< UINT_MAX
) {
2278 slave
->link_failure_count
++;
2281 if (bond
->params
.downdelay
) {
2282 printk(KERN_INFO DRV_NAME
2283 ": %s: link status down for %s "
2284 "interface %s, disabling it in "
2288 ? ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
2289 ? ((slave
== oldcurrent
)
2290 ? "active " : "backup ")
2294 bond
->params
.downdelay
* bond
->params
.miimon
);
2297 /* no break ! fall through the BOND_LINK_FAIL test to
2298 ensure proper action to be taken
2300 case BOND_LINK_FAIL
: /* the link has just gone down */
2301 if (link_state
!= BMSR_LSTATUS
) {
2302 /* link stays down */
2303 if (slave
->delay
<= 0) {
2307 /* link down for too long time */
2308 slave
->link
= BOND_LINK_DOWN
;
2310 /* in active/backup mode, we must
2311 * completely disable this interface
2313 if ((bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
) ||
2314 (bond
->params
.mode
== BOND_MODE_8023AD
)) {
2315 bond_set_slave_inactive_flags(slave
);
2318 printk(KERN_INFO DRV_NAME
2319 ": %s: link status definitely "
2320 "down for interface %s, "
2325 /* notify ad that the link status has changed */
2326 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2327 bond_3ad_handle_link_change(slave
, BOND_LINK_DOWN
);
2330 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2331 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2332 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_DOWN
);
2335 if (slave
== oldcurrent
) {
2343 slave
->link
= BOND_LINK_UP
;
2344 slave
->jiffies
= jiffies
;
2345 printk(KERN_INFO DRV_NAME
2346 ": %s: link status up again after %d "
2347 "ms for interface %s.\n",
2349 (bond
->params
.downdelay
- slave
->delay
) * bond
->params
.miimon
,
2353 case BOND_LINK_DOWN
: /* the link was down */
2354 if (link_state
!= BMSR_LSTATUS
) {
2355 /* the link stays down, nothing more to do */
2357 } else { /* link going up */
2358 slave
->link
= BOND_LINK_BACK
;
2359 slave
->delay
= bond
->params
.updelay
;
2361 if (bond
->params
.updelay
) {
2362 /* if updelay == 0, no need to
2363 advertise about a 0 ms delay */
2364 printk(KERN_INFO DRV_NAME
2365 ": %s: link status up for "
2366 "interface %s, enabling it "
2370 bond
->params
.updelay
* bond
->params
.miimon
);
2373 /* no break ! fall through the BOND_LINK_BACK state in
2374 case there's something to do.
2376 case BOND_LINK_BACK
: /* the link has just come back */
2377 if (link_state
!= BMSR_LSTATUS
) {
2378 /* link down again */
2379 slave
->link
= BOND_LINK_DOWN
;
2381 printk(KERN_INFO DRV_NAME
2382 ": %s: link status down again after %d "
2383 "ms for interface %s.\n",
2385 (bond
->params
.updelay
- slave
->delay
) * bond
->params
.miimon
,
2389 if (slave
->delay
== 0) {
2393 /* now the link has been up for long time enough */
2394 slave
->link
= BOND_LINK_UP
;
2395 slave
->jiffies
= jiffies
;
2397 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2398 /* prevent it from being the active one */
2399 slave
->state
= BOND_STATE_BACKUP
;
2400 } else if (bond
->params
.mode
!= BOND_MODE_ACTIVEBACKUP
) {
2401 /* make it immediately active */
2402 slave
->state
= BOND_STATE_ACTIVE
;
2403 } else if (slave
!= bond
->primary_slave
) {
2404 /* prevent it from being the active one */
2405 slave
->state
= BOND_STATE_BACKUP
;
2408 printk(KERN_INFO DRV_NAME
2409 ": %s: link status definitely "
2410 "up for interface %s.\n",
2414 /* notify ad that the link status has changed */
2415 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2416 bond_3ad_handle_link_change(slave
, BOND_LINK_UP
);
2419 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
2420 (bond
->params
.mode
== BOND_MODE_ALB
)) {
2421 bond_alb_handle_link_change(bond
, slave
, BOND_LINK_UP
);
2424 if ((!oldcurrent
) ||
2425 (slave
== bond
->primary_slave
)) {
2434 /* Should not happen */
2435 printk(KERN_ERR DRV_NAME
2436 ": %s: Error: %s Illegal value (link=%d)\n",
2441 } /* end of switch (slave->link) */
2443 bond_update_speed_duplex(slave
);
2445 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
2446 if (old_speed
!= slave
->speed
) {
2447 bond_3ad_adapter_speed_changed(slave
);
2450 if (old_duplex
!= slave
->duplex
) {
2451 bond_3ad_adapter_duplex_changed(slave
);
2460 write_lock_bh(&bond
->curr_slave_lock
);
2462 bond_select_active_slave(bond
);
2464 write_unlock_bh(&bond
->curr_slave_lock
);
2467 bond_set_carrier(bond
);
2476 * Really a wrapper that splits the mii monitor into two phases: an
2477 * inspection, then (if inspection indicates something needs to be
2478 * done) an acquisition of appropriate locks followed by another pass
2479 * to implement whatever link state changes are indicated.
2481 void bond_mii_monitor(struct work_struct
*work
)
2483 struct bonding
*bond
= container_of(work
, struct bonding
,
2485 unsigned long delay
;
2487 read_lock(&bond
->lock
);
2488 if (bond
->kill_timers
) {
2489 read_unlock(&bond
->lock
);
2493 if (bond
->send_grat_arp
) {
2494 read_lock(&bond
->curr_slave_lock
);
2495 bond_send_gratuitous_arp(bond
);
2496 read_unlock(&bond
->curr_slave_lock
);
2499 if (__bond_mii_monitor(bond
, 0)) {
2500 read_unlock(&bond
->lock
);
2502 read_lock(&bond
->lock
);
2503 __bond_mii_monitor(bond
, 1);
2504 read_unlock(&bond
->lock
);
2505 rtnl_unlock(); /* might sleep, hold no other locks */
2506 read_lock(&bond
->lock
);
2509 delay
= msecs_to_jiffies(bond
->params
.miimon
);
2510 read_unlock(&bond
->lock
);
2511 queue_delayed_work(bond
->wq
, &bond
->mii_work
, delay
);
2514 static __be32
bond_glean_dev_ip(struct net_device
*dev
)
2516 struct in_device
*idev
;
2517 struct in_ifaddr
*ifa
;
2524 idev
= __in_dev_get_rcu(dev
);
2528 ifa
= idev
->ifa_list
;
2532 addr
= ifa
->ifa_local
;
2538 static int bond_has_this_ip(struct bonding
*bond
, __be32 ip
)
2540 struct vlan_entry
*vlan
;
2542 if (ip
== bond
->master_ip
)
2545 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2546 if (ip
== vlan
->vlan_ip
)
2554 * We go to the (large) trouble of VLAN tagging ARP frames because
2555 * switches in VLAN mode (especially if ports are configured as
2556 * "native" to a VLAN) might not pass non-tagged frames.
2558 static void bond_arp_send(struct net_device
*slave_dev
, int arp_op
, __be32 dest_ip
, __be32 src_ip
, unsigned short vlan_id
)
2560 struct sk_buff
*skb
;
2562 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op
,
2563 slave_dev
->name
, dest_ip
, src_ip
, vlan_id
);
2565 skb
= arp_create(arp_op
, ETH_P_ARP
, dest_ip
, slave_dev
, src_ip
,
2566 NULL
, slave_dev
->dev_addr
, NULL
);
2569 printk(KERN_ERR DRV_NAME
": ARP packet allocation failed\n");
2573 skb
= vlan_put_tag(skb
, vlan_id
);
2575 printk(KERN_ERR DRV_NAME
": failed to insert VLAN tag\n");
2583 static void bond_arp_send_all(struct bonding
*bond
, struct slave
*slave
)
2586 __be32
*targets
= bond
->params
.arp_targets
;
2587 struct vlan_entry
*vlan
;
2588 struct net_device
*vlan_dev
;
2592 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
); i
++) {
2595 dprintk("basa: target %x\n", targets
[i
]);
2596 if (list_empty(&bond
->vlan_list
)) {
2597 dprintk("basa: empty vlan: arp_send\n");
2598 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2599 bond
->master_ip
, 0);
2604 * If VLANs are configured, we do a route lookup to
2605 * determine which VLAN interface would be used, so we
2606 * can tag the ARP with the proper VLAN tag.
2608 memset(&fl
, 0, sizeof(fl
));
2609 fl
.fl4_dst
= targets
[i
];
2610 fl
.fl4_tos
= RTO_ONLINK
;
2612 rv
= ip_route_output_key(&init_net
, &rt
, &fl
);
2614 if (net_ratelimit()) {
2615 printk(KERN_WARNING DRV_NAME
2616 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2617 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
));
2623 * This target is not on a VLAN
2625 if (rt
->u
.dst
.dev
== bond
->dev
) {
2627 dprintk("basa: rtdev == bond->dev: arp_send\n");
2628 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2629 bond
->master_ip
, 0);
2634 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2635 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2636 if (vlan_dev
== rt
->u
.dst
.dev
) {
2637 vlan_id
= vlan
->vlan_id
;
2638 dprintk("basa: vlan match on %s %d\n",
2639 vlan_dev
->name
, vlan_id
);
2646 bond_arp_send(slave
->dev
, ARPOP_REQUEST
, targets
[i
],
2647 vlan
->vlan_ip
, vlan_id
);
2651 if (net_ratelimit()) {
2652 printk(KERN_WARNING DRV_NAME
2653 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2654 bond
->dev
->name
, NIPQUAD(fl
.fl4_dst
),
2655 rt
->u
.dst
.dev
? rt
->u
.dst
.dev
->name
: "NULL");
2662 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2663 * for each VLAN above us.
2665 * Caller must hold curr_slave_lock for read or better
2667 static void bond_send_gratuitous_arp(struct bonding
*bond
)
2669 struct slave
*slave
= bond
->curr_active_slave
;
2670 struct vlan_entry
*vlan
;
2671 struct net_device
*vlan_dev
;
2673 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond
->dev
->name
,
2674 slave
? slave
->dev
->name
: "NULL");
2676 if (!slave
|| !bond
->send_grat_arp
||
2677 test_bit(__LINK_STATE_LINKWATCH_PENDING
, &slave
->dev
->state
))
2680 bond
->send_grat_arp
--;
2682 if (bond
->master_ip
) {
2683 bond_arp_send(slave
->dev
, ARPOP_REPLY
, bond
->master_ip
,
2684 bond
->master_ip
, 0);
2687 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
2688 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
2689 if (vlan
->vlan_ip
) {
2690 bond_arp_send(slave
->dev
, ARPOP_REPLY
, vlan
->vlan_ip
,
2691 vlan
->vlan_ip
, vlan
->vlan_id
);
2696 static void bond_validate_arp(struct bonding
*bond
, struct slave
*slave
, __be32 sip
, __be32 tip
)
2699 __be32
*targets
= bond
->params
.arp_targets
;
2701 targets
= bond
->params
.arp_targets
;
2702 for (i
= 0; (i
< BOND_MAX_ARP_TARGETS
) && targets
[i
]; i
++) {
2703 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2704 "%u.%u.%u.%u bhti(tip) %d\n",
2705 NIPQUAD(sip
), NIPQUAD(tip
), i
, NIPQUAD(targets
[i
]),
2706 bond_has_this_ip(bond
, tip
));
2707 if (sip
== targets
[i
]) {
2708 if (bond_has_this_ip(bond
, tip
))
2709 slave
->last_arp_rx
= jiffies
;
2715 static int bond_arp_rcv(struct sk_buff
*skb
, struct net_device
*dev
, struct packet_type
*pt
, struct net_device
*orig_dev
)
2718 struct slave
*slave
;
2719 struct bonding
*bond
;
2720 unsigned char *arp_ptr
;
2723 if (dev_net(dev
) != &init_net
)
2726 if (!(dev
->priv_flags
& IFF_BONDING
) || !(dev
->flags
& IFF_MASTER
))
2730 read_lock(&bond
->lock
);
2732 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2733 bond
->dev
->name
, skb
->dev
? skb
->dev
->name
: "NULL",
2734 orig_dev
? orig_dev
->name
: "NULL");
2736 slave
= bond_get_slave_by_dev(bond
, orig_dev
);
2737 if (!slave
|| !slave_do_arp_validate(bond
, slave
))
2740 if (!pskb_may_pull(skb
, arp_hdr_len(dev
)))
2744 if (arp
->ar_hln
!= dev
->addr_len
||
2745 skb
->pkt_type
== PACKET_OTHERHOST
||
2746 skb
->pkt_type
== PACKET_LOOPBACK
||
2747 arp
->ar_hrd
!= htons(ARPHRD_ETHER
) ||
2748 arp
->ar_pro
!= htons(ETH_P_IP
) ||
2752 arp_ptr
= (unsigned char *)(arp
+ 1);
2753 arp_ptr
+= dev
->addr_len
;
2754 memcpy(&sip
, arp_ptr
, 4);
2755 arp_ptr
+= 4 + dev
->addr_len
;
2756 memcpy(&tip
, arp_ptr
, 4);
2758 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2759 " tip %u.%u.%u.%u\n", bond
->dev
->name
, slave
->dev
->name
,
2760 slave
->state
, bond
->params
.arp_validate
,
2761 slave_do_arp_validate(bond
, slave
), NIPQUAD(sip
), NIPQUAD(tip
));
2764 * Backup slaves won't see the ARP reply, but do come through
2765 * here for each ARP probe (so we swap the sip/tip to validate
2766 * the probe). In a "redundant switch, common router" type of
2767 * configuration, the ARP probe will (hopefully) travel from
2768 * the active, through one switch, the router, then the other
2769 * switch before reaching the backup.
2771 if (slave
->state
== BOND_STATE_ACTIVE
)
2772 bond_validate_arp(bond
, slave
, sip
, tip
);
2774 bond_validate_arp(bond
, slave
, tip
, sip
);
2777 read_unlock(&bond
->lock
);
2780 return NET_RX_SUCCESS
;
2784 * this function is called regularly to monitor each slave's link
2785 * ensuring that traffic is being sent and received when arp monitoring
2786 * is used in load-balancing mode. if the adapter has been dormant, then an
2787 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2788 * arp monitoring in active backup mode.
2790 void bond_loadbalance_arp_mon(struct work_struct
*work
)
2792 struct bonding
*bond
= container_of(work
, struct bonding
,
2794 struct slave
*slave
, *oldcurrent
;
2795 int do_failover
= 0;
2799 read_lock(&bond
->lock
);
2801 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
2803 if (bond
->kill_timers
) {
2807 if (bond
->slave_cnt
== 0) {
2811 read_lock(&bond
->curr_slave_lock
);
2812 oldcurrent
= bond
->curr_active_slave
;
2813 read_unlock(&bond
->curr_slave_lock
);
2815 /* see if any of the previous devices are up now (i.e. they have
2816 * xmt and rcv traffic). the curr_active_slave does not come into
2817 * the picture unless it is null. also, slave->jiffies is not needed
2818 * here because we send an arp on each slave and give a slave as
2819 * long as it needs to get the tx/rx within the delta.
2820 * TODO: what about up/down delay in arp mode? it wasn't here before
2823 bond_for_each_slave(bond
, slave
, i
) {
2824 if (slave
->link
!= BOND_LINK_UP
) {
2825 if (time_before_eq(jiffies
, slave
->dev
->trans_start
+ delta_in_ticks
) &&
2826 time_before_eq(jiffies
, slave
->dev
->last_rx
+ delta_in_ticks
)) {
2828 slave
->link
= BOND_LINK_UP
;
2829 slave
->state
= BOND_STATE_ACTIVE
;
2831 /* primary_slave has no meaning in round-robin
2832 * mode. the window of a slave being up and
2833 * curr_active_slave being null after enslaving
2837 printk(KERN_INFO DRV_NAME
2838 ": %s: link status definitely "
2839 "up for interface %s, ",
2844 printk(KERN_INFO DRV_NAME
2845 ": %s: interface %s is now up\n",
2851 /* slave->link == BOND_LINK_UP */
2853 /* not all switches will respond to an arp request
2854 * when the source ip is 0, so don't take the link down
2855 * if we don't know our ip yet
2857 if (time_after_eq(jiffies
, slave
->dev
->trans_start
+ 2*delta_in_ticks
) ||
2858 (time_after_eq(jiffies
, slave
->dev
->last_rx
+ 2*delta_in_ticks
))) {
2860 slave
->link
= BOND_LINK_DOWN
;
2861 slave
->state
= BOND_STATE_BACKUP
;
2863 if (slave
->link_failure_count
< UINT_MAX
) {
2864 slave
->link_failure_count
++;
2867 printk(KERN_INFO DRV_NAME
2868 ": %s: interface %s is now down.\n",
2872 if (slave
== oldcurrent
) {
2878 /* note: if switch is in round-robin mode, all links
2879 * must tx arp to ensure all links rx an arp - otherwise
2880 * links may oscillate or not come up at all; if switch is
2881 * in something like xor mode, there is nothing we can
2882 * do - all replies will be rx'ed on same link causing slaves
2883 * to be unstable during low/no traffic periods
2885 if (IS_UP(slave
->dev
)) {
2886 bond_arp_send_all(bond
, slave
);
2891 write_lock_bh(&bond
->curr_slave_lock
);
2893 bond_select_active_slave(bond
);
2895 write_unlock_bh(&bond
->curr_slave_lock
);
2899 if (bond
->params
.arp_interval
)
2900 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
2902 read_unlock(&bond
->lock
);
2906 * Called to inspect slaves for active-backup mode ARP monitor link state
2907 * changes. Sets new_link in slaves to specify what action should take
2908 * place for the slave. Returns 0 if no changes are found, >0 if changes
2909 * to link states must be committed.
2911 * Called with bond->lock held for read.
2913 static int bond_ab_arp_inspect(struct bonding
*bond
, int delta_in_ticks
)
2915 struct slave
*slave
;
2918 bond_for_each_slave(bond
, slave
, i
) {
2919 slave
->new_link
= BOND_LINK_NOCHANGE
;
2921 if (slave
->link
!= BOND_LINK_UP
) {
2922 if (time_before_eq(jiffies
, slave_last_rx(bond
, slave
) +
2924 slave
->new_link
= BOND_LINK_UP
;
2932 * Give slaves 2*delta after being enslaved or made
2933 * active. This avoids bouncing, as the last receive
2934 * times need a full ARP monitor cycle to be updated.
2936 if (!time_after_eq(jiffies
, slave
->jiffies
+
2937 2 * delta_in_ticks
))
2941 * Backup slave is down if:
2942 * - No current_arp_slave AND
2943 * - more than 3*delta since last receive AND
2944 * - the bond has an IP address
2946 * Note: a non-null current_arp_slave indicates
2947 * the curr_active_slave went down and we are
2948 * searching for a new one; under this condition
2949 * we only take the curr_active_slave down - this
2950 * gives each slave a chance to tx/rx traffic
2951 * before being taken out
2953 if (slave
->state
== BOND_STATE_BACKUP
&&
2954 !bond
->current_arp_slave
&&
2955 time_after(jiffies
, slave_last_rx(bond
, slave
) +
2956 3 * delta_in_ticks
)) {
2957 slave
->new_link
= BOND_LINK_DOWN
;
2962 * Active slave is down if:
2963 * - more than 2*delta since transmitting OR
2964 * - (more than 2*delta since receive AND
2965 * the bond has an IP address)
2967 if ((slave
->state
== BOND_STATE_ACTIVE
) &&
2968 (time_after_eq(jiffies
, slave
->dev
->trans_start
+
2969 2 * delta_in_ticks
) ||
2970 (time_after_eq(jiffies
, slave_last_rx(bond
, slave
)
2971 + 2 * delta_in_ticks
)))) {
2972 slave
->new_link
= BOND_LINK_DOWN
;
2977 read_lock(&bond
->curr_slave_lock
);
2980 * Trigger a commit if the primary option setting has changed.
2982 if (bond
->primary_slave
&&
2983 (bond
->primary_slave
!= bond
->curr_active_slave
) &&
2984 (bond
->primary_slave
->link
== BOND_LINK_UP
))
2987 read_unlock(&bond
->curr_slave_lock
);
2993 * Called to commit link state changes noted by inspection step of
2994 * active-backup mode ARP monitor.
2996 * Called with RTNL and bond->lock for read.
2998 static void bond_ab_arp_commit(struct bonding
*bond
, int delta_in_ticks
)
3000 struct slave
*slave
;
3003 bond_for_each_slave(bond
, slave
, i
) {
3004 switch (slave
->new_link
) {
3005 case BOND_LINK_NOCHANGE
:
3009 write_lock_bh(&bond
->curr_slave_lock
);
3011 if (!bond
->curr_active_slave
&&
3012 time_before_eq(jiffies
, slave
->dev
->trans_start
+
3014 slave
->link
= BOND_LINK_UP
;
3015 bond_change_active_slave(bond
, slave
);
3016 bond
->current_arp_slave
= NULL
;
3018 printk(KERN_INFO DRV_NAME
3019 ": %s: %s is up and now the "
3020 "active interface\n",
3021 bond
->dev
->name
, slave
->dev
->name
);
3023 } else if (bond
->curr_active_slave
!= slave
) {
3024 /* this slave has just come up but we
3025 * already have a current slave; this can
3026 * also happen if bond_enslave adds a new
3027 * slave that is up while we are searching
3030 slave
->link
= BOND_LINK_UP
;
3031 bond_set_slave_inactive_flags(slave
);
3032 bond
->current_arp_slave
= NULL
;
3034 printk(KERN_INFO DRV_NAME
3035 ": %s: backup interface %s is now up\n",
3036 bond
->dev
->name
, slave
->dev
->name
);
3039 write_unlock_bh(&bond
->curr_slave_lock
);
3043 case BOND_LINK_DOWN
:
3044 if (slave
->link_failure_count
< UINT_MAX
)
3045 slave
->link_failure_count
++;
3047 slave
->link
= BOND_LINK_DOWN
;
3049 if (slave
== bond
->curr_active_slave
) {
3050 printk(KERN_INFO DRV_NAME
3051 ": %s: link status down for active "
3052 "interface %s, disabling it\n",
3053 bond
->dev
->name
, slave
->dev
->name
);
3055 bond_set_slave_inactive_flags(slave
);
3057 write_lock_bh(&bond
->curr_slave_lock
);
3059 bond_select_active_slave(bond
);
3060 if (bond
->curr_active_slave
)
3061 bond
->curr_active_slave
->jiffies
=
3064 write_unlock_bh(&bond
->curr_slave_lock
);
3066 bond
->current_arp_slave
= NULL
;
3068 } else if (slave
->state
== BOND_STATE_BACKUP
) {
3069 printk(KERN_INFO DRV_NAME
3070 ": %s: backup interface %s is now down\n",
3071 bond
->dev
->name
, slave
->dev
->name
);
3073 bond_set_slave_inactive_flags(slave
);
3078 printk(KERN_ERR DRV_NAME
3079 ": %s: impossible: new_link %d on slave %s\n",
3080 bond
->dev
->name
, slave
->new_link
,
3086 * No race with changes to primary via sysfs, as we hold rtnl.
3088 if (bond
->primary_slave
&&
3089 (bond
->primary_slave
!= bond
->curr_active_slave
) &&
3090 (bond
->primary_slave
->link
== BOND_LINK_UP
)) {
3091 write_lock_bh(&bond
->curr_slave_lock
);
3092 bond_change_active_slave(bond
, bond
->primary_slave
);
3093 write_unlock_bh(&bond
->curr_slave_lock
);
3096 bond_set_carrier(bond
);
3100 * Send ARP probes for active-backup mode ARP monitor.
3102 * Called with bond->lock held for read.
3104 static void bond_ab_arp_probe(struct bonding
*bond
)
3106 struct slave
*slave
;
3109 read_lock(&bond
->curr_slave_lock
);
3111 if (bond
->current_arp_slave
&& bond
->curr_active_slave
)
3112 printk("PROBE: c_arp %s && cas %s BAD\n",
3113 bond
->current_arp_slave
->dev
->name
,
3114 bond
->curr_active_slave
->dev
->name
);
3116 if (bond
->curr_active_slave
) {
3117 bond_arp_send_all(bond
, bond
->curr_active_slave
);
3118 read_unlock(&bond
->curr_slave_lock
);
3122 read_unlock(&bond
->curr_slave_lock
);
3124 /* if we don't have a curr_active_slave, search for the next available
3125 * backup slave from the current_arp_slave and make it the candidate
3126 * for becoming the curr_active_slave
3129 if (!bond
->current_arp_slave
) {
3130 bond
->current_arp_slave
= bond
->first_slave
;
3131 if (!bond
->current_arp_slave
)
3135 bond_set_slave_inactive_flags(bond
->current_arp_slave
);
3137 /* search for next candidate */
3138 bond_for_each_slave_from(bond
, slave
, i
, bond
->current_arp_slave
->next
) {
3139 if (IS_UP(slave
->dev
)) {
3140 slave
->link
= BOND_LINK_BACK
;
3141 bond_set_slave_active_flags(slave
);
3142 bond_arp_send_all(bond
, slave
);
3143 slave
->jiffies
= jiffies
;
3144 bond
->current_arp_slave
= slave
;
3148 /* if the link state is up at this point, we
3149 * mark it down - this can happen if we have
3150 * simultaneous link failures and
3151 * reselect_active_interface doesn't make this
3152 * one the current slave so it is still marked
3153 * up when it is actually down
3155 if (slave
->link
== BOND_LINK_UP
) {
3156 slave
->link
= BOND_LINK_DOWN
;
3157 if (slave
->link_failure_count
< UINT_MAX
)
3158 slave
->link_failure_count
++;
3160 bond_set_slave_inactive_flags(slave
);
3162 printk(KERN_INFO DRV_NAME
3163 ": %s: backup interface %s is now down.\n",
3164 bond
->dev
->name
, slave
->dev
->name
);
3169 void bond_activebackup_arp_mon(struct work_struct
*work
)
3171 struct bonding
*bond
= container_of(work
, struct bonding
,
3175 read_lock(&bond
->lock
);
3177 if (bond
->kill_timers
)
3180 delta_in_ticks
= msecs_to_jiffies(bond
->params
.arp_interval
);
3182 if (bond
->slave_cnt
== 0)
3185 if (bond
->send_grat_arp
) {
3186 read_lock(&bond
->curr_slave_lock
);
3187 bond_send_gratuitous_arp(bond
);
3188 read_unlock(&bond
->curr_slave_lock
);
3191 if (bond_ab_arp_inspect(bond
, delta_in_ticks
)) {
3192 read_unlock(&bond
->lock
);
3194 read_lock(&bond
->lock
);
3196 bond_ab_arp_commit(bond
, delta_in_ticks
);
3198 read_unlock(&bond
->lock
);
3200 read_lock(&bond
->lock
);
3203 bond_ab_arp_probe(bond
);
3206 if (bond
->params
.arp_interval
) {
3207 queue_delayed_work(bond
->wq
, &bond
->arp_work
, delta_in_ticks
);
3210 read_unlock(&bond
->lock
);
3213 /*------------------------------ proc/seq_file-------------------------------*/
3215 #ifdef CONFIG_PROC_FS
3217 static void *bond_info_seq_start(struct seq_file
*seq
, loff_t
*pos
)
3219 struct bonding
*bond
= seq
->private;
3221 struct slave
*slave
;
3224 /* make sure the bond won't be taken away */
3225 read_lock(&dev_base_lock
);
3226 read_lock(&bond
->lock
);
3229 return SEQ_START_TOKEN
;
3232 bond_for_each_slave(bond
, slave
, i
) {
3233 if (++off
== *pos
) {
3241 static void *bond_info_seq_next(struct seq_file
*seq
, void *v
, loff_t
*pos
)
3243 struct bonding
*bond
= seq
->private;
3244 struct slave
*slave
= v
;
3247 if (v
== SEQ_START_TOKEN
) {
3248 return bond
->first_slave
;
3251 slave
= slave
->next
;
3253 return (slave
== bond
->first_slave
) ? NULL
: slave
;
3256 static void bond_info_seq_stop(struct seq_file
*seq
, void *v
)
3258 struct bonding
*bond
= seq
->private;
3260 read_unlock(&bond
->lock
);
3261 read_unlock(&dev_base_lock
);
3264 static void bond_info_show_master(struct seq_file
*seq
)
3266 struct bonding
*bond
= seq
->private;
3271 read_lock(&bond
->curr_slave_lock
);
3272 curr
= bond
->curr_active_slave
;
3273 read_unlock(&bond
->curr_slave_lock
);
3275 seq_printf(seq
, "Bonding Mode: %s",
3276 bond_mode_name(bond
->params
.mode
));
3278 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
&&
3279 bond
->params
.fail_over_mac
)
3280 seq_printf(seq
, " (fail_over_mac %s)",
3281 fail_over_mac_tbl
[bond
->params
.fail_over_mac
].modename
);
3283 seq_printf(seq
, "\n");
3285 if (bond
->params
.mode
== BOND_MODE_XOR
||
3286 bond
->params
.mode
== BOND_MODE_8023AD
) {
3287 seq_printf(seq
, "Transmit Hash Policy: %s (%d)\n",
3288 xmit_hashtype_tbl
[bond
->params
.xmit_policy
].modename
,
3289 bond
->params
.xmit_policy
);
3292 if (USES_PRIMARY(bond
->params
.mode
)) {
3293 seq_printf(seq
, "Primary Slave: %s\n",
3294 (bond
->primary_slave
) ?
3295 bond
->primary_slave
->dev
->name
: "None");
3297 seq_printf(seq
, "Currently Active Slave: %s\n",
3298 (curr
) ? curr
->dev
->name
: "None");
3301 seq_printf(seq
, "MII Status: %s\n", netif_carrier_ok(bond
->dev
) ?
3303 seq_printf(seq
, "MII Polling Interval (ms): %d\n", bond
->params
.miimon
);
3304 seq_printf(seq
, "Up Delay (ms): %d\n",
3305 bond
->params
.updelay
* bond
->params
.miimon
);
3306 seq_printf(seq
, "Down Delay (ms): %d\n",
3307 bond
->params
.downdelay
* bond
->params
.miimon
);
3310 /* ARP information */
3311 if(bond
->params
.arp_interval
> 0) {
3313 seq_printf(seq
, "ARP Polling Interval (ms): %d\n",
3314 bond
->params
.arp_interval
);
3316 seq_printf(seq
, "ARP IP target/s (n.n.n.n form):");
3318 for(i
= 0; (i
< BOND_MAX_ARP_TARGETS
) ;i
++) {
3319 if (!bond
->params
.arp_targets
[i
])
3322 seq_printf(seq
, ",");
3323 target
= ntohl(bond
->params
.arp_targets
[i
]);
3324 seq_printf(seq
, " %d.%d.%d.%d", HIPQUAD(target
));
3327 seq_printf(seq
, "\n");
3330 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3331 struct ad_info ad_info
;
3332 DECLARE_MAC_BUF(mac
);
3334 seq_puts(seq
, "\n802.3ad info\n");
3335 seq_printf(seq
, "LACP rate: %s\n",
3336 (bond
->params
.lacp_fast
) ? "fast" : "slow");
3338 if (bond_3ad_get_active_agg_info(bond
, &ad_info
)) {
3339 seq_printf(seq
, "bond %s has no active aggregator\n",
3342 seq_printf(seq
, "Active Aggregator Info:\n");
3344 seq_printf(seq
, "\tAggregator ID: %d\n",
3345 ad_info
.aggregator_id
);
3346 seq_printf(seq
, "\tNumber of ports: %d\n",
3348 seq_printf(seq
, "\tActor Key: %d\n",
3350 seq_printf(seq
, "\tPartner Key: %d\n",
3351 ad_info
.partner_key
);
3352 seq_printf(seq
, "\tPartner Mac Address: %s\n",
3353 print_mac(mac
, ad_info
.partner_system
));
3358 static void bond_info_show_slave(struct seq_file
*seq
, const struct slave
*slave
)
3360 struct bonding
*bond
= seq
->private;
3361 DECLARE_MAC_BUF(mac
);
3363 seq_printf(seq
, "\nSlave Interface: %s\n", slave
->dev
->name
);
3364 seq_printf(seq
, "MII Status: %s\n",
3365 (slave
->link
== BOND_LINK_UP
) ? "up" : "down");
3366 seq_printf(seq
, "Link Failure Count: %u\n",
3367 slave
->link_failure_count
);
3370 "Permanent HW addr: %s\n",
3371 print_mac(mac
, slave
->perm_hwaddr
));
3373 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3374 const struct aggregator
*agg
3375 = SLAVE_AD_INFO(slave
).port
.aggregator
;
3378 seq_printf(seq
, "Aggregator ID: %d\n",
3379 agg
->aggregator_identifier
);
3381 seq_puts(seq
, "Aggregator ID: N/A\n");
3386 static int bond_info_seq_show(struct seq_file
*seq
, void *v
)
3388 if (v
== SEQ_START_TOKEN
) {
3389 seq_printf(seq
, "%s\n", version
);
3390 bond_info_show_master(seq
);
3392 bond_info_show_slave(seq
, v
);
3398 static struct seq_operations bond_info_seq_ops
= {
3399 .start
= bond_info_seq_start
,
3400 .next
= bond_info_seq_next
,
3401 .stop
= bond_info_seq_stop
,
3402 .show
= bond_info_seq_show
,
3405 static int bond_info_open(struct inode
*inode
, struct file
*file
)
3407 struct seq_file
*seq
;
3408 struct proc_dir_entry
*proc
;
3411 res
= seq_open(file
, &bond_info_seq_ops
);
3413 /* recover the pointer buried in proc_dir_entry data */
3414 seq
= file
->private_data
;
3416 seq
->private = proc
->data
;
3422 static const struct file_operations bond_info_fops
= {
3423 .owner
= THIS_MODULE
,
3424 .open
= bond_info_open
,
3426 .llseek
= seq_lseek
,
3427 .release
= seq_release
,
3430 static int bond_create_proc_entry(struct bonding
*bond
)
3432 struct net_device
*bond_dev
= bond
->dev
;
3434 if (bond_proc_dir
) {
3435 bond
->proc_entry
= proc_create_data(bond_dev
->name
,
3436 S_IRUGO
, bond_proc_dir
,
3437 &bond_info_fops
, bond
);
3438 if (bond
->proc_entry
== NULL
) {
3439 printk(KERN_WARNING DRV_NAME
3440 ": Warning: Cannot create /proc/net/%s/%s\n",
3441 DRV_NAME
, bond_dev
->name
);
3443 memcpy(bond
->proc_file_name
, bond_dev
->name
, IFNAMSIZ
);
3450 static void bond_remove_proc_entry(struct bonding
*bond
)
3452 if (bond_proc_dir
&& bond
->proc_entry
) {
3453 remove_proc_entry(bond
->proc_file_name
, bond_proc_dir
);
3454 memset(bond
->proc_file_name
, 0, IFNAMSIZ
);
3455 bond
->proc_entry
= NULL
;
3459 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3460 * Caller must hold rtnl_lock.
3462 static void bond_create_proc_dir(void)
3464 int len
= strlen(DRV_NAME
);
3466 for (bond_proc_dir
= init_net
.proc_net
->subdir
; bond_proc_dir
;
3467 bond_proc_dir
= bond_proc_dir
->next
) {
3468 if ((bond_proc_dir
->namelen
== len
) &&
3469 !memcmp(bond_proc_dir
->name
, DRV_NAME
, len
)) {
3474 if (!bond_proc_dir
) {
3475 bond_proc_dir
= proc_mkdir(DRV_NAME
, init_net
.proc_net
);
3476 if (bond_proc_dir
) {
3477 bond_proc_dir
->owner
= THIS_MODULE
;
3479 printk(KERN_WARNING DRV_NAME
3480 ": Warning: cannot create /proc/net/%s\n",
3486 /* Destroy the bonding directory under /proc/net, if empty.
3487 * Caller must hold rtnl_lock.
3489 static void bond_destroy_proc_dir(void)
3491 struct proc_dir_entry
*de
;
3493 if (!bond_proc_dir
) {
3497 /* verify that the /proc dir is empty */
3498 for (de
= bond_proc_dir
->subdir
; de
; de
= de
->next
) {
3499 /* ignore . and .. */
3500 if (*(de
->name
) != '.') {
3506 if (bond_proc_dir
->owner
== THIS_MODULE
) {
3507 bond_proc_dir
->owner
= NULL
;
3510 remove_proc_entry(DRV_NAME
, init_net
.proc_net
);
3511 bond_proc_dir
= NULL
;
3514 #endif /* CONFIG_PROC_FS */
3516 /*-------------------------- netdev event handling --------------------------*/
3519 * Change device name
3521 static int bond_event_changename(struct bonding
*bond
)
3523 #ifdef CONFIG_PROC_FS
3524 bond_remove_proc_entry(bond
);
3525 bond_create_proc_entry(bond
);
3527 down_write(&(bonding_rwsem
));
3528 bond_destroy_sysfs_entry(bond
);
3529 bond_create_sysfs_entry(bond
);
3530 up_write(&(bonding_rwsem
));
3534 static int bond_master_netdev_event(unsigned long event
, struct net_device
*bond_dev
)
3536 struct bonding
*event_bond
= bond_dev
->priv
;
3539 case NETDEV_CHANGENAME
:
3540 return bond_event_changename(event_bond
);
3541 case NETDEV_UNREGISTER
:
3542 bond_release_all(event_bond
->dev
);
3551 static int bond_slave_netdev_event(unsigned long event
, struct net_device
*slave_dev
)
3553 struct net_device
*bond_dev
= slave_dev
->master
;
3554 struct bonding
*bond
= bond_dev
->priv
;
3557 case NETDEV_UNREGISTER
:
3559 if (bond
->setup_by_slave
)
3560 bond_release_and_destroy(bond_dev
, slave_dev
);
3562 bond_release(bond_dev
, slave_dev
);
3567 * TODO: is this what we get if somebody
3568 * sets up a hierarchical bond, then rmmod's
3569 * one of the slave bonding devices?
3574 * ... Or is it this?
3577 case NETDEV_CHANGEMTU
:
3579 * TODO: Should slaves be allowed to
3580 * independently alter their MTU? For
3581 * an active-backup bond, slaves need
3582 * not be the same type of device, so
3583 * MTUs may vary. For other modes,
3584 * slaves arguably should have the
3585 * same MTUs. To do this, we'd need to
3586 * take over the slave's change_mtu
3587 * function for the duration of their
3591 case NETDEV_CHANGENAME
:
3593 * TODO: handle changing the primary's name
3596 case NETDEV_FEAT_CHANGE
:
3597 bond_compute_features(bond
);
3607 * bond_netdev_event: handle netdev notifier chain events.
3609 * This function receives events for the netdev chain. The caller (an
3610 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3611 * locks for us to safely manipulate the slave devices (RTNL lock,
3614 static int bond_netdev_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3616 struct net_device
*event_dev
= (struct net_device
*)ptr
;
3618 if (dev_net(event_dev
) != &init_net
)
3621 dprintk("event_dev: %s, event: %lx\n",
3622 (event_dev
? event_dev
->name
: "None"),
3625 if (!(event_dev
->priv_flags
& IFF_BONDING
))
3628 if (event_dev
->flags
& IFF_MASTER
) {
3629 dprintk("IFF_MASTER\n");
3630 return bond_master_netdev_event(event
, event_dev
);
3633 if (event_dev
->flags
& IFF_SLAVE
) {
3634 dprintk("IFF_SLAVE\n");
3635 return bond_slave_netdev_event(event
, event_dev
);
3642 * bond_inetaddr_event: handle inetaddr notifier chain events.
3644 * We keep track of device IPs primarily to use as source addresses in
3645 * ARP monitor probes (rather than spewing out broadcasts all the time).
3647 * We track one IP for the main device (if it has one), plus one per VLAN.
3649 static int bond_inetaddr_event(struct notifier_block
*this, unsigned long event
, void *ptr
)
3651 struct in_ifaddr
*ifa
= ptr
;
3652 struct net_device
*vlan_dev
, *event_dev
= ifa
->ifa_dev
->dev
;
3653 struct bonding
*bond
;
3654 struct vlan_entry
*vlan
;
3656 if (dev_net(ifa
->ifa_dev
->dev
) != &init_net
)
3659 list_for_each_entry(bond
, &bond_dev_list
, bond_list
) {
3660 if (bond
->dev
== event_dev
) {
3663 bond
->master_ip
= ifa
->ifa_local
;
3666 bond
->master_ip
= bond_glean_dev_ip(bond
->dev
);
3673 list_for_each_entry(vlan
, &bond
->vlan_list
, vlan_list
) {
3674 vlan_dev
= vlan_group_get_device(bond
->vlgrp
, vlan
->vlan_id
);
3675 if (vlan_dev
== event_dev
) {
3678 vlan
->vlan_ip
= ifa
->ifa_local
;
3682 bond_glean_dev_ip(vlan_dev
);
3693 static struct notifier_block bond_netdev_notifier
= {
3694 .notifier_call
= bond_netdev_event
,
3697 static struct notifier_block bond_inetaddr_notifier
= {
3698 .notifier_call
= bond_inetaddr_event
,
3701 /*-------------------------- Packet type handling ---------------------------*/
3703 /* register to receive lacpdus on a bond */
3704 static void bond_register_lacpdu(struct bonding
*bond
)
3706 struct packet_type
*pk_type
= &(BOND_AD_INFO(bond
).ad_pkt_type
);
3708 /* initialize packet type */
3709 pk_type
->type
= PKT_TYPE_LACPDU
;
3710 pk_type
->dev
= bond
->dev
;
3711 pk_type
->func
= bond_3ad_lacpdu_recv
;
3713 dev_add_pack(pk_type
);
3716 /* unregister to receive lacpdus on a bond */
3717 static void bond_unregister_lacpdu(struct bonding
*bond
)
3719 dev_remove_pack(&(BOND_AD_INFO(bond
).ad_pkt_type
));
3722 void bond_register_arp(struct bonding
*bond
)
3724 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3729 pt
->type
= htons(ETH_P_ARP
);
3730 pt
->dev
= bond
->dev
;
3731 pt
->func
= bond_arp_rcv
;
3735 void bond_unregister_arp(struct bonding
*bond
)
3737 struct packet_type
*pt
= &bond
->arp_mon_pt
;
3739 dev_remove_pack(pt
);
3743 /*---------------------------- Hashing Policies -----------------------------*/
3746 * Hash for the output device based upon layer 2 and layer 3 data. If
3747 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3749 static int bond_xmit_hash_policy_l23(struct sk_buff
*skb
,
3750 struct net_device
*bond_dev
, int count
)
3752 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3753 struct iphdr
*iph
= ip_hdr(skb
);
3755 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3756 return ((ntohl(iph
->saddr
^ iph
->daddr
) & 0xffff) ^
3757 (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5])) % count
;
3760 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3764 * Hash for the output device based upon layer 3 and layer 4 data. If
3765 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3766 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3768 static int bond_xmit_hash_policy_l34(struct sk_buff
*skb
,
3769 struct net_device
*bond_dev
, int count
)
3771 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3772 struct iphdr
*iph
= ip_hdr(skb
);
3773 __be16
*layer4hdr
= (__be16
*)((u32
*)iph
+ iph
->ihl
);
3776 if (skb
->protocol
== __constant_htons(ETH_P_IP
)) {
3777 if (!(iph
->frag_off
& __constant_htons(IP_MF
|IP_OFFSET
)) &&
3778 (iph
->protocol
== IPPROTO_TCP
||
3779 iph
->protocol
== IPPROTO_UDP
)) {
3780 layer4_xor
= ntohs((*layer4hdr
^ *(layer4hdr
+ 1)));
3782 return (layer4_xor
^
3783 ((ntohl(iph
->saddr
^ iph
->daddr
)) & 0xffff)) % count
;
3787 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3791 * Hash for the output device based upon layer 2 data
3793 static int bond_xmit_hash_policy_l2(struct sk_buff
*skb
,
3794 struct net_device
*bond_dev
, int count
)
3796 struct ethhdr
*data
= (struct ethhdr
*)skb
->data
;
3798 return (data
->h_dest
[5] ^ bond_dev
->dev_addr
[5]) % count
;
3801 /*-------------------------- Device entry points ----------------------------*/
3803 static int bond_open(struct net_device
*bond_dev
)
3805 struct bonding
*bond
= bond_dev
->priv
;
3807 bond
->kill_timers
= 0;
3809 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3810 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3811 /* bond_alb_initialize must be called before the timer
3814 if (bond_alb_initialize(bond
, (bond
->params
.mode
== BOND_MODE_ALB
))) {
3815 /* something went wrong - fail the open operation */
3819 INIT_DELAYED_WORK(&bond
->alb_work
, bond_alb_monitor
);
3820 queue_delayed_work(bond
->wq
, &bond
->alb_work
, 0);
3823 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3824 INIT_DELAYED_WORK(&bond
->mii_work
, bond_mii_monitor
);
3825 queue_delayed_work(bond
->wq
, &bond
->mii_work
, 0);
3828 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3829 if (bond
->params
.mode
== BOND_MODE_ACTIVEBACKUP
)
3830 INIT_DELAYED_WORK(&bond
->arp_work
,
3831 bond_activebackup_arp_mon
);
3833 INIT_DELAYED_WORK(&bond
->arp_work
,
3834 bond_loadbalance_arp_mon
);
3836 queue_delayed_work(bond
->wq
, &bond
->arp_work
, 0);
3837 if (bond
->params
.arp_validate
)
3838 bond_register_arp(bond
);
3841 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3842 INIT_DELAYED_WORK(&bond
->ad_work
, bond_3ad_state_machine_handler
);
3843 queue_delayed_work(bond
->wq
, &bond
->ad_work
, 0);
3844 /* register to receive LACPDUs */
3845 bond_register_lacpdu(bond
);
3851 static int bond_close(struct net_device
*bond_dev
)
3853 struct bonding
*bond
= bond_dev
->priv
;
3855 if (bond
->params
.mode
== BOND_MODE_8023AD
) {
3856 /* Unregister the receive of LACPDUs */
3857 bond_unregister_lacpdu(bond
);
3860 if (bond
->params
.arp_validate
)
3861 bond_unregister_arp(bond
);
3863 write_lock_bh(&bond
->lock
);
3865 bond
->send_grat_arp
= 0;
3867 /* signal timers not to re-arm */
3868 bond
->kill_timers
= 1;
3870 write_unlock_bh(&bond
->lock
);
3872 if (bond
->params
.miimon
) { /* link check interval, in milliseconds. */
3873 cancel_delayed_work(&bond
->mii_work
);
3876 if (bond
->params
.arp_interval
) { /* arp interval, in milliseconds. */
3877 cancel_delayed_work(&bond
->arp_work
);
3880 switch (bond
->params
.mode
) {
3881 case BOND_MODE_8023AD
:
3882 cancel_delayed_work(&bond
->ad_work
);
3886 cancel_delayed_work(&bond
->alb_work
);
3893 if ((bond
->params
.mode
== BOND_MODE_TLB
) ||
3894 (bond
->params
.mode
== BOND_MODE_ALB
)) {
3895 /* Must be called only after all
3896 * slaves have been released
3898 bond_alb_deinitialize(bond
);
3904 static struct net_device_stats
*bond_get_stats(struct net_device
*bond_dev
)
3906 struct bonding
*bond
= bond_dev
->priv
;
3907 struct net_device_stats
*stats
= &(bond
->stats
), *sstats
;
3908 struct net_device_stats local_stats
;
3909 struct slave
*slave
;
3912 memset(&local_stats
, 0, sizeof(struct net_device_stats
));
3914 read_lock_bh(&bond
->lock
);
3916 bond_for_each_slave(bond
, slave
, i
) {
3917 sstats
= slave
->dev
->get_stats(slave
->dev
);
3918 local_stats
.rx_packets
+= sstats
->rx_packets
;
3919 local_stats
.rx_bytes
+= sstats
->rx_bytes
;
3920 local_stats
.rx_errors
+= sstats
->rx_errors
;
3921 local_stats
.rx_dropped
+= sstats
->rx_dropped
;
3923 local_stats
.tx_packets
+= sstats
->tx_packets
;
3924 local_stats
.tx_bytes
+= sstats
->tx_bytes
;
3925 local_stats
.tx_errors
+= sstats
->tx_errors
;
3926 local_stats
.tx_dropped
+= sstats
->tx_dropped
;
3928 local_stats
.multicast
+= sstats
->multicast
;
3929 local_stats
.collisions
+= sstats
->collisions
;
3931 local_stats
.rx_length_errors
+= sstats
->rx_length_errors
;
3932 local_stats
.rx_over_errors
+= sstats
->rx_over_errors
;
3933 local_stats
.rx_crc_errors
+= sstats
->rx_crc_errors
;
3934 local_stats
.rx_frame_errors
+= sstats
->rx_frame_errors
;
3935 local_stats
.rx_fifo_errors
+= sstats
->rx_fifo_errors
;
3936 local_stats
.rx_missed_errors
+= sstats
->rx_missed_errors
;
3938 local_stats
.tx_aborted_errors
+= sstats
->tx_aborted_errors
;
3939 local_stats
.tx_carrier_errors
+= sstats
->tx_carrier_errors
;
3940 local_stats
.tx_fifo_errors
+= sstats
->tx_fifo_errors
;
3941 local_stats
.tx_heartbeat_errors
+= sstats
->tx_heartbeat_errors
;
3942 local_stats
.tx_window_errors
+= sstats
->tx_window_errors
;
3945 memcpy(stats
, &local_stats
, sizeof(struct net_device_stats
));
3947 read_unlock_bh(&bond
->lock
);
3952 static int bond_do_ioctl(struct net_device
*bond_dev
, struct ifreq
*ifr
, int cmd
)
3954 struct net_device
*slave_dev
= NULL
;
3955 struct ifbond k_binfo
;
3956 struct ifbond __user
*u_binfo
= NULL
;
3957 struct ifslave k_sinfo
;
3958 struct ifslave __user
*u_sinfo
= NULL
;
3959 struct mii_ioctl_data
*mii
= NULL
;
3962 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3963 bond_dev
->name
, cmd
);
3975 * We do this again just in case we were called by SIOCGMIIREG
3976 * instead of SIOCGMIIPHY.
3983 if (mii
->reg_num
== 1) {
3984 struct bonding
*bond
= bond_dev
->priv
;
3986 read_lock(&bond
->lock
);
3987 read_lock(&bond
->curr_slave_lock
);
3988 if (netif_carrier_ok(bond
->dev
)) {
3989 mii
->val_out
= BMSR_LSTATUS
;
3991 read_unlock(&bond
->curr_slave_lock
);
3992 read_unlock(&bond
->lock
);
3996 case BOND_INFO_QUERY_OLD
:
3997 case SIOCBONDINFOQUERY
:
3998 u_binfo
= (struct ifbond __user
*)ifr
->ifr_data
;
4000 if (copy_from_user(&k_binfo
, u_binfo
, sizeof(ifbond
))) {
4004 res
= bond_info_query(bond_dev
, &k_binfo
);
4006 if (copy_to_user(u_binfo
, &k_binfo
, sizeof(ifbond
))) {
4012 case BOND_SLAVE_INFO_QUERY_OLD
:
4013 case SIOCBONDSLAVEINFOQUERY
:
4014 u_sinfo
= (struct ifslave __user
*)ifr
->ifr_data
;
4016 if (copy_from_user(&k_sinfo
, u_sinfo
, sizeof(ifslave
))) {
4020 res
= bond_slave_info_query(bond_dev
, &k_sinfo
);
4022 if (copy_to_user(u_sinfo
, &k_sinfo
, sizeof(ifslave
))) {
4033 if (!capable(CAP_NET_ADMIN
)) {
4037 down_write(&(bonding_rwsem
));
4038 slave_dev
= dev_get_by_name(&init_net
, ifr
->ifr_slave
);
4040 dprintk("slave_dev=%p: \n", slave_dev
);
4045 dprintk("slave_dev->name=%s: \n", slave_dev
->name
);
4047 case BOND_ENSLAVE_OLD
:
4048 case SIOCBONDENSLAVE
:
4049 res
= bond_enslave(bond_dev
, slave_dev
);
4051 case BOND_RELEASE_OLD
:
4052 case SIOCBONDRELEASE
:
4053 res
= bond_release(bond_dev
, slave_dev
);
4055 case BOND_SETHWADDR_OLD
:
4056 case SIOCBONDSETHWADDR
:
4057 res
= bond_sethwaddr(bond_dev
, slave_dev
);
4059 case BOND_CHANGE_ACTIVE_OLD
:
4060 case SIOCBONDCHANGEACTIVE
:
4061 res
= bond_ioctl_change_active(bond_dev
, slave_dev
);
4070 up_write(&(bonding_rwsem
));
4074 static void bond_set_multicast_list(struct net_device
*bond_dev
)
4076 struct bonding
*bond
= bond_dev
->priv
;
4077 struct dev_mc_list
*dmi
;
4080 * Do promisc before checking multicast_mode
4082 if ((bond_dev
->flags
& IFF_PROMISC
) && !(bond
->flags
& IFF_PROMISC
)) {
4084 * FIXME: Need to handle the error when one of the multi-slaves
4087 bond_set_promiscuity(bond
, 1);
4090 if (!(bond_dev
->flags
& IFF_PROMISC
) && (bond
->flags
& IFF_PROMISC
)) {
4091 bond_set_promiscuity(bond
, -1);
4094 /* set allmulti flag to slaves */
4095 if ((bond_dev
->flags
& IFF_ALLMULTI
) && !(bond
->flags
& IFF_ALLMULTI
)) {
4097 * FIXME: Need to handle the error when one of the multi-slaves
4100 bond_set_allmulti(bond
, 1);
4103 if (!(bond_dev
->flags
& IFF_ALLMULTI
) && (bond
->flags
& IFF_ALLMULTI
)) {
4104 bond_set_allmulti(bond
, -1);
4107 read_lock(&bond
->lock
);
4109 bond
->flags
= bond_dev
->flags
;
4111 /* looking for addresses to add to slaves' mc list */
4112 for (dmi
= bond_dev
->mc_list
; dmi
; dmi
= dmi
->next
) {
4113 if (!bond_mc_list_find_dmi(dmi
, bond
->mc_list
)) {
4114 bond_mc_add(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
4118 /* looking for addresses to delete from slaves' list */
4119 for (dmi
= bond
->mc_list
; dmi
; dmi
= dmi
->next
) {
4120 if (!bond_mc_list_find_dmi(dmi
, bond_dev
->mc_list
)) {
4121 bond_mc_delete(bond
, dmi
->dmi_addr
, dmi
->dmi_addrlen
);
4125 /* save master's multicast list */
4126 bond_mc_list_destroy(bond
);
4127 bond_mc_list_copy(bond_dev
->mc_list
, bond
, GFP_ATOMIC
);
4129 read_unlock(&bond
->lock
);
4133 * Change the MTU of all of a master's slaves to match the master
4135 static int bond_change_mtu(struct net_device
*bond_dev
, int new_mtu
)
4137 struct bonding
*bond
= bond_dev
->priv
;
4138 struct slave
*slave
, *stop_at
;
4142 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond
,
4143 (bond_dev
? bond_dev
->name
: "None"), new_mtu
);
4145 /* Can't hold bond->lock with bh disabled here since
4146 * some base drivers panic. On the other hand we can't
4147 * hold bond->lock without bh disabled because we'll
4148 * deadlock. The only solution is to rely on the fact
4149 * that we're under rtnl_lock here, and the slaves
4150 * list won't change. This doesn't solve the problem
4151 * of setting the slave's MTU while it is
4152 * transmitting, but the assumption is that the base
4153 * driver can handle that.
4155 * TODO: figure out a way to safely iterate the slaves
4156 * list, but without holding a lock around the actual
4157 * call to the base driver.
4160 bond_for_each_slave(bond
, slave
, i
) {
4161 dprintk("s %p s->p %p c_m %p\n", slave
,
4162 slave
->prev
, slave
->dev
->change_mtu
);
4164 res
= dev_set_mtu(slave
->dev
, new_mtu
);
4167 /* If we failed to set the slave's mtu to the new value
4168 * we must abort the operation even in ACTIVE_BACKUP
4169 * mode, because if we allow the backup slaves to have
4170 * different mtu values than the active slave we'll
4171 * need to change their mtu when doing a failover. That
4172 * means changing their mtu from timer context, which
4173 * is probably not a good idea.
4175 dprintk("err %d %s\n", res
, slave
->dev
->name
);
4180 bond_dev
->mtu
= new_mtu
;
4185 /* unwind from head to the slave that failed */
4187 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4190 tmp_res
= dev_set_mtu(slave
->dev
, bond_dev
->mtu
);
4192 dprintk("unwind err %d dev %s\n", tmp_res
,
4203 * Note that many devices must be down to change the HW address, and
4204 * downing the master releases all slaves. We can make bonds full of
4205 * bonding devices to test this, however.
4207 static int bond_set_mac_address(struct net_device
*bond_dev
, void *addr
)
4209 struct bonding
*bond
= bond_dev
->priv
;
4210 struct sockaddr
*sa
= addr
, tmp_sa
;
4211 struct slave
*slave
, *stop_at
;
4215 dprintk("bond=%p, name=%s\n", bond
, (bond_dev
? bond_dev
->name
: "None"));
4218 * If fail_over_mac is set to active, do nothing and return
4219 * success. Returning an error causes ifenslave to fail.
4221 if (bond
->params
.fail_over_mac
== BOND_FOM_ACTIVE
)
4224 if (!is_valid_ether_addr(sa
->sa_data
)) {
4225 return -EADDRNOTAVAIL
;
4228 /* Can't hold bond->lock with bh disabled here since
4229 * some base drivers panic. On the other hand we can't
4230 * hold bond->lock without bh disabled because we'll
4231 * deadlock. The only solution is to rely on the fact
4232 * that we're under rtnl_lock here, and the slaves
4233 * list won't change. This doesn't solve the problem
4234 * of setting the slave's hw address while it is
4235 * transmitting, but the assumption is that the base
4236 * driver can handle that.
4238 * TODO: figure out a way to safely iterate the slaves
4239 * list, but without holding a lock around the actual
4240 * call to the base driver.
4243 bond_for_each_slave(bond
, slave
, i
) {
4244 dprintk("slave %p %s\n", slave
, slave
->dev
->name
);
4246 if (slave
->dev
->set_mac_address
== NULL
) {
4248 dprintk("EOPNOTSUPP %s\n", slave
->dev
->name
);
4252 res
= dev_set_mac_address(slave
->dev
, addr
);
4254 /* TODO: consider downing the slave
4256 * User should expect communications
4257 * breakage anyway until ARP finish
4260 dprintk("err %d %s\n", res
, slave
->dev
->name
);
4266 memcpy(bond_dev
->dev_addr
, sa
->sa_data
, bond_dev
->addr_len
);
4270 memcpy(tmp_sa
.sa_data
, bond_dev
->dev_addr
, bond_dev
->addr_len
);
4271 tmp_sa
.sa_family
= bond_dev
->type
;
4273 /* unwind from head to the slave that failed */
4275 bond_for_each_slave_from_to(bond
, slave
, i
, bond
->first_slave
, stop_at
) {
4278 tmp_res
= dev_set_mac_address(slave
->dev
, &tmp_sa
);
4280 dprintk("unwind err %d dev %s\n", tmp_res
,
4288 static int bond_xmit_roundrobin(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4290 struct bonding
*bond
= bond_dev
->priv
;
4291 struct slave
*slave
, *start_at
;
4292 int i
, slave_no
, res
= 1;
4294 read_lock(&bond
->lock
);
4296 if (!BOND_IS_OK(bond
)) {
4301 * Concurrent TX may collide on rr_tx_counter; we accept that
4302 * as being rare enough not to justify using an atomic op here
4304 slave_no
= bond
->rr_tx_counter
++ % bond
->slave_cnt
;
4306 bond_for_each_slave(bond
, slave
, i
) {
4314 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4315 if (IS_UP(slave
->dev
) &&
4316 (slave
->link
== BOND_LINK_UP
) &&
4317 (slave
->state
== BOND_STATE_ACTIVE
)) {
4318 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4325 /* no suitable interface, frame not sent */
4328 read_unlock(&bond
->lock
);
4334 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4335 * the bond has a usable interface.
4337 static int bond_xmit_activebackup(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4339 struct bonding
*bond
= bond_dev
->priv
;
4342 read_lock(&bond
->lock
);
4343 read_lock(&bond
->curr_slave_lock
);
4345 if (!BOND_IS_OK(bond
)) {
4349 if (!bond
->curr_active_slave
)
4352 res
= bond_dev_queue_xmit(bond
, skb
, bond
->curr_active_slave
->dev
);
4356 /* no suitable interface, frame not sent */
4359 read_unlock(&bond
->curr_slave_lock
);
4360 read_unlock(&bond
->lock
);
4365 * In bond_xmit_xor() , we determine the output device by using a pre-
4366 * determined xmit_hash_policy(), If the selected device is not enabled,
4367 * find the next active slave.
4369 static int bond_xmit_xor(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4371 struct bonding
*bond
= bond_dev
->priv
;
4372 struct slave
*slave
, *start_at
;
4377 read_lock(&bond
->lock
);
4379 if (!BOND_IS_OK(bond
)) {
4383 slave_no
= bond
->xmit_hash_policy(skb
, bond_dev
, bond
->slave_cnt
);
4385 bond_for_each_slave(bond
, slave
, i
) {
4394 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4395 if (IS_UP(slave
->dev
) &&
4396 (slave
->link
== BOND_LINK_UP
) &&
4397 (slave
->state
== BOND_STATE_ACTIVE
)) {
4398 res
= bond_dev_queue_xmit(bond
, skb
, slave
->dev
);
4405 /* no suitable interface, frame not sent */
4408 read_unlock(&bond
->lock
);
4413 * in broadcast mode, we send everything to all usable interfaces.
4415 static int bond_xmit_broadcast(struct sk_buff
*skb
, struct net_device
*bond_dev
)
4417 struct bonding
*bond
= bond_dev
->priv
;
4418 struct slave
*slave
, *start_at
;
4419 struct net_device
*tx_dev
= NULL
;
4423 read_lock(&bond
->lock
);
4425 if (!BOND_IS_OK(bond
)) {
4429 read_lock(&bond
->curr_slave_lock
);
4430 start_at
= bond
->curr_active_slave
;
4431 read_unlock(&bond
->curr_slave_lock
);
4437 bond_for_each_slave_from(bond
, slave
, i
, start_at
) {
4438 if (IS_UP(slave
->dev
) &&
4439 (slave
->link
== BOND_LINK_UP
) &&
4440 (slave
->state
== BOND_STATE_ACTIVE
)) {
4442 struct sk_buff
*skb2
= skb_clone(skb
, GFP_ATOMIC
);
4444 printk(KERN_ERR DRV_NAME
4445 ": %s: Error: bond_xmit_broadcast(): "
4446 "skb_clone() failed\n",
4451 res
= bond_dev_queue_xmit(bond
, skb2
, tx_dev
);
4453 dev_kfree_skb(skb2
);
4457 tx_dev
= slave
->dev
;
4462 res
= bond_dev_queue_xmit(bond
, skb
, tx_dev
);
4467 /* no suitable interface, frame not sent */
4470 /* frame sent to all suitable interfaces */
4471 read_unlock(&bond
->lock
);
4475 /*------------------------- Device initialization ---------------------------*/
4477 static void bond_set_xmit_hash_policy(struct bonding
*bond
)
4479 switch (bond
->params
.xmit_policy
) {
4480 case BOND_XMIT_POLICY_LAYER23
:
4481 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l23
;
4483 case BOND_XMIT_POLICY_LAYER34
:
4484 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l34
;
4486 case BOND_XMIT_POLICY_LAYER2
:
4488 bond
->xmit_hash_policy
= bond_xmit_hash_policy_l2
;
4494 * set bond mode specific net device operations
4496 void bond_set_mode_ops(struct bonding
*bond
, int mode
)
4498 struct net_device
*bond_dev
= bond
->dev
;
4501 case BOND_MODE_ROUNDROBIN
:
4502 bond_dev
->hard_start_xmit
= bond_xmit_roundrobin
;
4504 case BOND_MODE_ACTIVEBACKUP
:
4505 bond_dev
->hard_start_xmit
= bond_xmit_activebackup
;
4508 bond_dev
->hard_start_xmit
= bond_xmit_xor
;
4509 bond_set_xmit_hash_policy(bond
);
4511 case BOND_MODE_BROADCAST
:
4512 bond_dev
->hard_start_xmit
= bond_xmit_broadcast
;
4514 case BOND_MODE_8023AD
:
4515 bond_set_master_3ad_flags(bond
);
4516 bond_dev
->hard_start_xmit
= bond_3ad_xmit_xor
;
4517 bond_set_xmit_hash_policy(bond
);
4520 bond_set_master_alb_flags(bond
);
4523 bond_dev
->hard_start_xmit
= bond_alb_xmit
;
4524 bond_dev
->set_mac_address
= bond_alb_set_mac_address
;
4527 /* Should never happen, mode already checked */
4528 printk(KERN_ERR DRV_NAME
4529 ": %s: Error: Unknown bonding mode %d\n",
4536 static void bond_ethtool_get_drvinfo(struct net_device
*bond_dev
,
4537 struct ethtool_drvinfo
*drvinfo
)
4539 strncpy(drvinfo
->driver
, DRV_NAME
, 32);
4540 strncpy(drvinfo
->version
, DRV_VERSION
, 32);
4541 snprintf(drvinfo
->fw_version
, 32, "%d", BOND_ABI_VERSION
);
4544 static const struct ethtool_ops bond_ethtool_ops
= {
4545 .get_drvinfo
= bond_ethtool_get_drvinfo
,
4549 * Does not allocate but creates a /proc entry.
4552 static int bond_init(struct net_device
*bond_dev
, struct bond_params
*params
)
4554 struct bonding
*bond
= bond_dev
->priv
;
4556 dprintk("Begin bond_init for %s\n", bond_dev
->name
);
4558 /* initialize rwlocks */
4559 rwlock_init(&bond
->lock
);
4560 rwlock_init(&bond
->curr_slave_lock
);
4562 bond
->params
= *params
; /* copy params struct */
4564 bond
->wq
= create_singlethread_workqueue(bond_dev
->name
);
4568 /* Initialize pointers */
4569 bond
->first_slave
= NULL
;
4570 bond
->curr_active_slave
= NULL
;
4571 bond
->current_arp_slave
= NULL
;
4572 bond
->primary_slave
= NULL
;
4573 bond
->dev
= bond_dev
;
4574 bond
->send_grat_arp
= 0;
4575 bond
->setup_by_slave
= 0;
4576 INIT_LIST_HEAD(&bond
->vlan_list
);
4578 /* Initialize the device entry points */
4579 bond_dev
->open
= bond_open
;
4580 bond_dev
->stop
= bond_close
;
4581 bond_dev
->get_stats
= bond_get_stats
;
4582 bond_dev
->do_ioctl
= bond_do_ioctl
;
4583 bond_dev
->ethtool_ops
= &bond_ethtool_ops
;
4584 bond_dev
->set_multicast_list
= bond_set_multicast_list
;
4585 bond_dev
->change_mtu
= bond_change_mtu
;
4586 bond_dev
->set_mac_address
= bond_set_mac_address
;
4587 bond_dev
->validate_addr
= NULL
;
4589 bond_set_mode_ops(bond
, bond
->params
.mode
);
4591 bond_dev
->destructor
= free_netdev
;
4593 /* Initialize the device options */
4594 bond_dev
->tx_queue_len
= 0;
4595 bond_dev
->flags
|= IFF_MASTER
|IFF_MULTICAST
;
4596 bond_dev
->priv_flags
|= IFF_BONDING
;
4598 /* At first, we block adding VLANs. That's the only way to
4599 * prevent problems that occur when adding VLANs over an
4600 * empty bond. The block will be removed once non-challenged
4601 * slaves are enslaved.
4603 bond_dev
->features
|= NETIF_F_VLAN_CHALLENGED
;
4605 /* don't acquire bond device's netif_tx_lock when
4607 bond_dev
->features
|= NETIF_F_LLTX
;
4609 /* By default, we declare the bond to be fully
4610 * VLAN hardware accelerated capable. Special
4611 * care is taken in the various xmit functions
4612 * when there are slaves that are not hw accel
4615 bond_dev
->vlan_rx_register
= bond_vlan_rx_register
;
4616 bond_dev
->vlan_rx_add_vid
= bond_vlan_rx_add_vid
;
4617 bond_dev
->vlan_rx_kill_vid
= bond_vlan_rx_kill_vid
;
4618 bond_dev
->features
|= (NETIF_F_HW_VLAN_TX
|
4619 NETIF_F_HW_VLAN_RX
|
4620 NETIF_F_HW_VLAN_FILTER
);
4622 #ifdef CONFIG_PROC_FS
4623 bond_create_proc_entry(bond
);
4625 list_add_tail(&bond
->bond_list
, &bond_dev_list
);
4630 /* De-initialize device specific data.
4631 * Caller must hold rtnl_lock.
4633 static void bond_deinit(struct net_device
*bond_dev
)
4635 struct bonding
*bond
= bond_dev
->priv
;
4637 list_del(&bond
->bond_list
);
4639 #ifdef CONFIG_PROC_FS
4640 bond_remove_proc_entry(bond
);
4644 static void bond_work_cancel_all(struct bonding
*bond
)
4646 write_lock_bh(&bond
->lock
);
4647 bond
->kill_timers
= 1;
4648 write_unlock_bh(&bond
->lock
);
4650 if (bond
->params
.miimon
&& delayed_work_pending(&bond
->mii_work
))
4651 cancel_delayed_work(&bond
->mii_work
);
4653 if (bond
->params
.arp_interval
&& delayed_work_pending(&bond
->arp_work
))
4654 cancel_delayed_work(&bond
->arp_work
);
4656 if (bond
->params
.mode
== BOND_MODE_ALB
&&
4657 delayed_work_pending(&bond
->alb_work
))
4658 cancel_delayed_work(&bond
->alb_work
);
4660 if (bond
->params
.mode
== BOND_MODE_8023AD
&&
4661 delayed_work_pending(&bond
->ad_work
))
4662 cancel_delayed_work(&bond
->ad_work
);
4665 /* Unregister and free all bond devices.
4666 * Caller must hold rtnl_lock.
4668 static void bond_free_all(void)
4670 struct bonding
*bond
, *nxt
;
4672 list_for_each_entry_safe(bond
, nxt
, &bond_dev_list
, bond_list
) {
4673 struct net_device
*bond_dev
= bond
->dev
;
4675 bond_work_cancel_all(bond
);
4676 netif_addr_lock_bh(bond_dev
);
4677 bond_mc_list_destroy(bond
);
4678 netif_addr_unlock_bh(bond_dev
);
4679 /* Release the bonded slaves */
4680 bond_release_all(bond_dev
);
4684 #ifdef CONFIG_PROC_FS
4685 bond_destroy_proc_dir();
4689 /*------------------------- Module initialization ---------------------------*/
4692 * Convert string input module parms. Accept either the
4693 * number of the mode or its string name. A bit complicated because
4694 * some mode names are substrings of other names, and calls from sysfs
4695 * may have whitespace in the name (trailing newlines, for example).
4697 int bond_parse_parm(const char *buf
, struct bond_parm_tbl
*tbl
)
4699 int mode
= -1, i
, rv
;
4700 char *p
, modestr
[BOND_MAX_MODENAME_LEN
+ 1] = { 0, };
4702 for (p
= (char *)buf
; *p
; p
++)
4703 if (!(isdigit(*p
) || isspace(*p
)))
4707 rv
= sscanf(buf
, "%20s", modestr
);
4709 rv
= sscanf(buf
, "%d", &mode
);
4714 for (i
= 0; tbl
[i
].modename
; i
++) {
4715 if (mode
== tbl
[i
].mode
)
4717 if (strcmp(modestr
, tbl
[i
].modename
) == 0)
4724 static int bond_check_params(struct bond_params
*params
)
4726 int arp_validate_value
, fail_over_mac_value
;
4729 * Convert string parameters.
4732 bond_mode
= bond_parse_parm(mode
, bond_mode_tbl
);
4733 if (bond_mode
== -1) {
4734 printk(KERN_ERR DRV_NAME
4735 ": Error: Invalid bonding mode \"%s\"\n",
4736 mode
== NULL
? "NULL" : mode
);
4741 if (xmit_hash_policy
) {
4742 if ((bond_mode
!= BOND_MODE_XOR
) &&
4743 (bond_mode
!= BOND_MODE_8023AD
)) {
4744 printk(KERN_INFO DRV_NAME
4745 ": xor_mode param is irrelevant in mode %s\n",
4746 bond_mode_name(bond_mode
));
4748 xmit_hashtype
= bond_parse_parm(xmit_hash_policy
,
4750 if (xmit_hashtype
== -1) {
4751 printk(KERN_ERR DRV_NAME
4752 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4753 xmit_hash_policy
== NULL
? "NULL" :
4761 if (bond_mode
!= BOND_MODE_8023AD
) {
4762 printk(KERN_INFO DRV_NAME
4763 ": lacp_rate param is irrelevant in mode %s\n",
4764 bond_mode_name(bond_mode
));
4766 lacp_fast
= bond_parse_parm(lacp_rate
, bond_lacp_tbl
);
4767 if (lacp_fast
== -1) {
4768 printk(KERN_ERR DRV_NAME
4769 ": Error: Invalid lacp rate \"%s\"\n",
4770 lacp_rate
== NULL
? "NULL" : lacp_rate
);
4776 if (max_bonds
< 0 || max_bonds
> INT_MAX
) {
4777 printk(KERN_WARNING DRV_NAME
4778 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4779 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4780 max_bonds
, 0, INT_MAX
, BOND_DEFAULT_MAX_BONDS
);
4781 max_bonds
= BOND_DEFAULT_MAX_BONDS
;
4785 printk(KERN_WARNING DRV_NAME
4786 ": Warning: miimon module parameter (%d), "
4787 "not in range 0-%d, so it was reset to %d\n",
4788 miimon
, INT_MAX
, BOND_LINK_MON_INTERV
);
4789 miimon
= BOND_LINK_MON_INTERV
;
4793 printk(KERN_WARNING DRV_NAME
4794 ": Warning: updelay module parameter (%d), "
4795 "not in range 0-%d, so it was reset to 0\n",
4800 if (downdelay
< 0) {
4801 printk(KERN_WARNING DRV_NAME
4802 ": Warning: downdelay module parameter (%d), "
4803 "not in range 0-%d, so it was reset to 0\n",
4804 downdelay
, INT_MAX
);
4808 if ((use_carrier
!= 0) && (use_carrier
!= 1)) {
4809 printk(KERN_WARNING DRV_NAME
4810 ": Warning: use_carrier module parameter (%d), "
4811 "not of valid value (0/1), so it was set to 1\n",
4816 if (num_grat_arp
< 0 || num_grat_arp
> 255) {
4817 printk(KERN_WARNING DRV_NAME
4818 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4819 "was reset to 1 \n", num_grat_arp
);
4823 /* reset values for 802.3ad */
4824 if (bond_mode
== BOND_MODE_8023AD
) {
4826 printk(KERN_WARNING DRV_NAME
4827 ": Warning: miimon must be specified, "
4828 "otherwise bonding will not detect link "
4829 "failure, speed and duplex which are "
4830 "essential for 802.3ad operation\n");
4831 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4836 /* reset values for TLB/ALB */
4837 if ((bond_mode
== BOND_MODE_TLB
) ||
4838 (bond_mode
== BOND_MODE_ALB
)) {
4840 printk(KERN_WARNING DRV_NAME
4841 ": Warning: miimon must be specified, "
4842 "otherwise bonding will not detect link "
4843 "failure and link speed which are essential "
4844 "for TLB/ALB load balancing\n");
4845 printk(KERN_WARNING
"Forcing miimon to 100msec\n");
4850 if (bond_mode
== BOND_MODE_ALB
) {
4851 printk(KERN_NOTICE DRV_NAME
4852 ": In ALB mode you might experience client "
4853 "disconnections upon reconnection of a link if the "
4854 "bonding module updelay parameter (%d msec) is "
4855 "incompatible with the forwarding delay time of the "
4861 if (updelay
|| downdelay
) {
4862 /* just warn the user the up/down delay will have
4863 * no effect since miimon is zero...
4865 printk(KERN_WARNING DRV_NAME
4866 ": Warning: miimon module parameter not set "
4867 "and updelay (%d) or downdelay (%d) module "
4868 "parameter is set; updelay and downdelay have "
4869 "no effect unless miimon is set\n",
4870 updelay
, downdelay
);
4873 /* don't allow arp monitoring */
4875 printk(KERN_WARNING DRV_NAME
4876 ": Warning: miimon (%d) and arp_interval (%d) "
4877 "can't be used simultaneously, disabling ARP "
4879 miimon
, arp_interval
);
4883 if ((updelay
% miimon
) != 0) {
4884 printk(KERN_WARNING DRV_NAME
4885 ": Warning: updelay (%d) is not a multiple "
4886 "of miimon (%d), updelay rounded to %d ms\n",
4887 updelay
, miimon
, (updelay
/ miimon
) * miimon
);
4892 if ((downdelay
% miimon
) != 0) {
4893 printk(KERN_WARNING DRV_NAME
4894 ": Warning: downdelay (%d) is not a multiple "
4895 "of miimon (%d), downdelay rounded to %d ms\n",
4897 (downdelay
/ miimon
) * miimon
);
4900 downdelay
/= miimon
;
4903 if (arp_interval
< 0) {
4904 printk(KERN_WARNING DRV_NAME
4905 ": Warning: arp_interval module parameter (%d) "
4906 ", not in range 0-%d, so it was reset to %d\n",
4907 arp_interval
, INT_MAX
, BOND_LINK_ARP_INTERV
);
4908 arp_interval
= BOND_LINK_ARP_INTERV
;
4911 for (arp_ip_count
= 0;
4912 (arp_ip_count
< BOND_MAX_ARP_TARGETS
) && arp_ip_target
[arp_ip_count
];
4914 /* not complete check, but should be good enough to
4916 if (!isdigit(arp_ip_target
[arp_ip_count
][0])) {
4917 printk(KERN_WARNING DRV_NAME
4918 ": Warning: bad arp_ip_target module parameter "
4919 "(%s), ARP monitoring will not be performed\n",
4920 arp_ip_target
[arp_ip_count
]);
4923 __be32 ip
= in_aton(arp_ip_target
[arp_ip_count
]);
4924 arp_target
[arp_ip_count
] = ip
;
4928 if (arp_interval
&& !arp_ip_count
) {
4929 /* don't allow arping if no arp_ip_target given... */
4930 printk(KERN_WARNING DRV_NAME
4931 ": Warning: arp_interval module parameter (%d) "
4932 "specified without providing an arp_ip_target "
4933 "parameter, arp_interval was reset to 0\n",
4939 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
) {
4940 printk(KERN_ERR DRV_NAME
4941 ": arp_validate only supported in active-backup mode\n");
4944 if (!arp_interval
) {
4945 printk(KERN_ERR DRV_NAME
4946 ": arp_validate requires arp_interval\n");
4950 arp_validate_value
= bond_parse_parm(arp_validate
,
4952 if (arp_validate_value
== -1) {
4953 printk(KERN_ERR DRV_NAME
4954 ": Error: invalid arp_validate \"%s\"\n",
4955 arp_validate
== NULL
? "NULL" : arp_validate
);
4959 arp_validate_value
= 0;
4962 printk(KERN_INFO DRV_NAME
4963 ": MII link monitoring set to %d ms\n",
4965 } else if (arp_interval
) {
4968 printk(KERN_INFO DRV_NAME
4969 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4971 arp_validate_tbl
[arp_validate_value
].modename
,
4974 for (i
= 0; i
< arp_ip_count
; i
++)
4975 printk (" %s", arp_ip_target
[i
]);
4979 } else if (max_bonds
) {
4980 /* miimon and arp_interval not set, we need one so things
4981 * work as expected, see bonding.txt for details
4983 printk(KERN_WARNING DRV_NAME
4984 ": Warning: either miimon or arp_interval and "
4985 "arp_ip_target module parameters must be specified, "
4986 "otherwise bonding will not detect link failures! see "
4987 "bonding.txt for details.\n");
4990 if (primary
&& !USES_PRIMARY(bond_mode
)) {
4991 /* currently, using a primary only makes sense
4992 * in active backup, TLB or ALB modes
4994 printk(KERN_WARNING DRV_NAME
4995 ": Warning: %s primary device specified but has no "
4996 "effect in %s mode\n",
4997 primary
, bond_mode_name(bond_mode
));
5001 if (fail_over_mac
) {
5002 fail_over_mac_value
= bond_parse_parm(fail_over_mac
,
5004 if (fail_over_mac_value
== -1) {
5005 printk(KERN_ERR DRV_NAME
5006 ": Error: invalid fail_over_mac \"%s\"\n",
5007 arp_validate
== NULL
? "NULL" : arp_validate
);
5011 if (bond_mode
!= BOND_MODE_ACTIVEBACKUP
)
5012 printk(KERN_WARNING DRV_NAME
5013 ": Warning: fail_over_mac only affects "
5014 "active-backup mode.\n");
5016 fail_over_mac_value
= BOND_FOM_NONE
;
5019 /* fill params struct with the proper values */
5020 params
->mode
= bond_mode
;
5021 params
->xmit_policy
= xmit_hashtype
;
5022 params
->miimon
= miimon
;
5023 params
->num_grat_arp
= num_grat_arp
;
5024 params
->arp_interval
= arp_interval
;
5025 params
->arp_validate
= arp_validate_value
;
5026 params
->updelay
= updelay
;
5027 params
->downdelay
= downdelay
;
5028 params
->use_carrier
= use_carrier
;
5029 params
->lacp_fast
= lacp_fast
;
5030 params
->primary
[0] = 0;
5031 params
->fail_over_mac
= fail_over_mac_value
;
5034 strncpy(params
->primary
, primary
, IFNAMSIZ
);
5035 params
->primary
[IFNAMSIZ
- 1] = 0;
5038 memcpy(params
->arp_targets
, arp_target
, sizeof(arp_target
));
5043 static struct lock_class_key bonding_netdev_xmit_lock_key
;
5044 static struct lock_class_key bonding_netdev_addr_lock_key
;
5046 static void bond_set_lockdep_class_one(struct net_device
*dev
,
5047 struct netdev_queue
*txq
,
5050 lockdep_set_class(&txq
->_xmit_lock
,
5051 &bonding_netdev_xmit_lock_key
);
5054 static void bond_set_lockdep_class(struct net_device
*dev
)
5056 lockdep_set_class(&dev
->addr_list_lock
,
5057 &bonding_netdev_addr_lock_key
);
5058 netdev_for_each_tx_queue(dev
, bond_set_lockdep_class_one
, NULL
);
5061 /* Create a new bond based on the specified name and bonding parameters.
5062 * If name is NULL, obtain a suitable "bond%d" name for us.
5063 * Caller must NOT hold rtnl_lock; we need to release it here before we
5064 * set up our sysfs entries.
5066 int bond_create(char *name
, struct bond_params
*params
)
5068 struct net_device
*bond_dev
;
5069 struct bonding
*bond
;
5073 down_write(&bonding_rwsem
);
5075 /* Check to see if the bond already exists. */
5077 list_for_each_entry(bond
, &bond_dev_list
, bond_list
)
5078 if (strnicmp(bond
->dev
->name
, name
, IFNAMSIZ
) == 0) {
5079 printk(KERN_ERR DRV_NAME
5080 ": cannot add bond %s; it already exists\n",
5087 bond_dev
= alloc_netdev(sizeof(struct bonding
), name
? name
: "",
5090 printk(KERN_ERR DRV_NAME
5091 ": %s: eek! can't alloc netdev!\n",
5098 res
= dev_alloc_name(bond_dev
, "bond%d");
5103 /* bond_init() must be called after dev_alloc_name() (for the
5104 * /proc files), but before register_netdevice(), because we
5105 * need to set function pointers.
5108 res
= bond_init(bond_dev
, params
);
5113 res
= register_netdevice(bond_dev
);
5118 bond_set_lockdep_class(bond_dev
);
5120 netif_carrier_off(bond_dev
);
5122 up_write(&bonding_rwsem
);
5123 rtnl_unlock(); /* allows sysfs registration of net device */
5124 res
= bond_create_sysfs_entry(bond_dev
->priv
);
5127 down_write(&bonding_rwsem
);
5128 bond_deinit(bond_dev
);
5129 unregister_netdevice(bond_dev
);
5136 bond_deinit(bond_dev
);
5138 free_netdev(bond_dev
);
5140 up_write(&bonding_rwsem
);
5145 static int __init
bonding_init(void)
5149 struct bonding
*bond
;
5151 printk(KERN_INFO
"%s", version
);
5153 res
= bond_check_params(&bonding_defaults
);
5158 #ifdef CONFIG_PROC_FS
5159 bond_create_proc_dir();
5162 init_rwsem(&bonding_rwsem
);
5164 for (i
= 0; i
< max_bonds
; i
++) {
5165 res
= bond_create(NULL
, &bonding_defaults
);
5170 res
= bond_create_sysfs();
5174 register_netdevice_notifier(&bond_netdev_notifier
);
5175 register_inetaddr_notifier(&bond_inetaddr_notifier
);
5179 list_for_each_entry(bond
, &bond_dev_list
, bond_list
) {
5180 bond_work_cancel_all(bond
);
5181 destroy_workqueue(bond
->wq
);
5184 bond_destroy_sysfs();
5194 static void __exit
bonding_exit(void)
5196 unregister_netdevice_notifier(&bond_netdev_notifier
);
5197 unregister_inetaddr_notifier(&bond_inetaddr_notifier
);
5199 bond_destroy_sysfs();
5206 module_init(bonding_init
);
5207 module_exit(bonding_exit
);
5208 MODULE_LICENSE("GPL");
5209 MODULE_VERSION(DRV_VERSION
);
5210 MODULE_DESCRIPTION(DRV_DESCRIPTION
", v" DRV_VERSION
);
5211 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5212 MODULE_SUPPORTED_DEVICE("most ethernet devices");