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 void bond_set_promiscuity(struct bonding *bond, int inc)
777 if (USES_PRIMARY(bond->params.mode)) {
778 /* write lock already acquired */
779 if (bond->curr_active_slave) {
780 dev_set_promiscuity(bond->curr_active_slave->dev, inc);
785 bond_for_each_slave(bond, slave, i) {
786 dev_set_promiscuity(slave->dev, inc);
792 * Push the allmulti flag down to all slaves
794 static void bond_set_allmulti(struct bonding *bond, int inc)
796 if (USES_PRIMARY(bond->params.mode)) {
797 /* write lock already acquired */
798 if (bond->curr_active_slave) {
799 dev_set_allmulti(bond->curr_active_slave->dev, inc);
804 bond_for_each_slave(bond, slave, i) {
805 dev_set_allmulti(slave->dev, inc);
811 * Add a Multicast address to slaves
814 static void bond_mc_add(struct bonding *bond, void *addr, int alen)
816 if (USES_PRIMARY(bond->params.mode)) {
817 /* write lock already acquired */
818 if (bond->curr_active_slave) {
819 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
824 bond_for_each_slave(bond, slave, i) {
825 dev_mc_add(slave->dev, addr, alen, 0);
831 * Remove a multicast address from slave
834 static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
836 if (USES_PRIMARY(bond->params.mode)) {
837 /* write lock already acquired */
838 if (bond->curr_active_slave) {
839 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
844 bond_for_each_slave(bond, slave, i) {
845 dev_mc_delete(slave->dev, addr, alen, 0);
852 * Retrieve the list of registered multicast addresses for the bonding
853 * device and retransmit an IGMP JOIN request to the current active
856 static void bond_resend_igmp_join_requests(struct bonding *bond)
858 struct in_device *in_dev;
859 struct ip_mc_list *im;
862 in_dev = __in_dev_get_rcu(bond->dev);
864 for (im = in_dev->mc_list; im; im = im->next) {
865 ip_mc_rejoin_group(im);
873 * Totally destroys the mc_list in bond
875 static void bond_mc_list_destroy(struct bonding *bond)
877 struct dev_mc_list *dmi;
881 bond->mc_list = dmi->next;
885 bond->mc_list = NULL;
889 * Copy all the Multicast addresses from src to the bonding device dst
891 static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
894 struct dev_mc_list *dmi, *new_dmi;
896 for (dmi = mc_list; dmi; dmi = dmi->next) {
897 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
900 /* FIXME: Potential memory leak !!! */
904 new_dmi->next = bond->mc_list;
905 bond->mc_list = new_dmi;
906 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
907 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
908 new_dmi->dmi_users = dmi->dmi_users;
909 new_dmi->dmi_gusers = dmi->dmi_gusers;
916 * flush all members of flush->mc_list from device dev->mc_list
918 static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
920 struct bonding *bond = bond_dev->priv;
921 struct dev_mc_list *dmi;
923 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
924 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
927 if (bond->params.mode == BOND_MODE_8023AD) {
928 /* del lacpdu mc addr from mc list */
929 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
931 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
935 /*--------------------------- Active slave change ---------------------------*/
938 * Update the mc list and multicast-related flags for the new and
939 * old active slaves (if any) according to the multicast mode, and
940 * promiscuous flags unconditionally.
942 static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
944 struct dev_mc_list *dmi;
946 if (!USES_PRIMARY(bond->params.mode)) {
947 /* nothing to do - mc list is already up-to-date on
954 if (bond->dev->flags & IFF_PROMISC) {
955 dev_set_promiscuity(old_active->dev, -1);
958 if (bond->dev->flags & IFF_ALLMULTI) {
959 dev_set_allmulti(old_active->dev, -1);
962 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
963 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
968 if (bond->dev->flags & IFF_PROMISC) {
969 dev_set_promiscuity(new_active->dev, 1);
972 if (bond->dev->flags & IFF_ALLMULTI) {
973 dev_set_allmulti(new_active->dev, 1);
976 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
977 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
979 bond_resend_igmp_join_requests(bond);
984 * bond_do_fail_over_mac
986 * Perform special MAC address swapping for fail_over_mac settings
988 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
990 static void bond_do_fail_over_mac(struct bonding *bond,
991 struct slave *new_active,
992 struct slave *old_active)
994 u8 tmp_mac[ETH_ALEN];
995 struct sockaddr saddr;
998 switch (bond->params.fail_over_mac) {
999 case BOND_FOM_ACTIVE:
1001 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1002 new_active->dev->addr_len);
1004 case BOND_FOM_FOLLOW:
1006 * if new_active && old_active, swap them
1007 * if just old_active, do nothing (going to no active slave)
1008 * if just new_active, set new_active to bond's MAC
1013 write_unlock_bh(&bond->curr_slave_lock);
1014 read_unlock(&bond->lock);
1017 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1018 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1020 saddr.sa_family = new_active->dev->type;
1022 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1023 saddr.sa_family = bond->dev->type;
1026 rv = dev_set_mac_address(new_active->dev, &saddr);
1028 printk(KERN_ERR DRV_NAME
1029 ": %s: Error %d setting MAC of slave %s\n",
1030 bond->dev->name, -rv, new_active->dev->name);
1037 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1038 saddr.sa_family = old_active->dev->type;
1040 rv = dev_set_mac_address(old_active->dev, &saddr);
1042 printk(KERN_ERR DRV_NAME
1043 ": %s: Error %d setting MAC of slave %s\n",
1044 bond->dev->name, -rv, new_active->dev->name);
1046 read_lock(&bond->lock);
1047 write_lock_bh(&bond->curr_slave_lock);
1050 printk(KERN_ERR DRV_NAME
1051 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1052 bond->dev->name, bond->params.fail_over_mac);
1060 * find_best_interface - select the best available slave to be the active one
1061 * @bond: our bonding struct
1063 * Warning: Caller must hold curr_slave_lock for writing.
1065 static struct slave *bond_find_best_slave(struct bonding *bond)
1067 struct slave *new_active, *old_active;
1068 struct slave *bestslave = NULL;
1069 int mintime = bond->params.updelay;
1072 new_active = old_active = bond->curr_active_slave;
1074 if (!new_active) { /* there were no active slaves left */
1075 if (bond->slave_cnt > 0) { /* found one slave */
1076 new_active = bond->first_slave;
1078 return NULL; /* still no slave, return NULL */
1082 /* first try the primary link; if arping, a link must tx/rx traffic
1083 * before it can be considered the curr_active_slave - also, we would skip
1084 * slaves between the curr_active_slave and primary_slave that may be up
1087 if ((bond->primary_slave) &&
1088 (!bond->params.arp_interval) &&
1089 (IS_UP(bond->primary_slave->dev))) {
1090 new_active = bond->primary_slave;
1093 /* remember where to stop iterating over the slaves */
1094 old_active = new_active;
1096 bond_for_each_slave_from(bond, new_active, i, old_active) {
1097 if (IS_UP(new_active->dev)) {
1098 if (new_active->link == BOND_LINK_UP) {
1100 } else if (new_active->link == BOND_LINK_BACK) {
1101 /* link up, but waiting for stabilization */
1102 if (new_active->delay < mintime) {
1103 mintime = new_active->delay;
1104 bestslave = new_active;
1114 * change_active_interface - change the active slave into the specified one
1115 * @bond: our bonding struct
1116 * @new: the new slave to make the active one
1118 * Set the new slave to the bond's settings and unset them on the old
1119 * curr_active_slave.
1120 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1122 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1123 * because it is apparently the best available slave we have, even though its
1124 * updelay hasn't timed out yet.
1126 * If new_active is not NULL, caller must hold bond->lock for read and
1127 * curr_slave_lock for write_bh.
1129 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1131 struct slave *old_active = bond->curr_active_slave;
1133 if (old_active == new_active) {
1138 new_active->jiffies = jiffies;
1140 if (new_active->link == BOND_LINK_BACK) {
1141 if (USES_PRIMARY(bond->params.mode)) {
1142 printk(KERN_INFO DRV_NAME
1143 ": %s: making interface %s the new "
1144 "active one %d ms earlier.\n",
1145 bond->dev->name, new_active->dev->name,
1146 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1149 new_active->delay = 0;
1150 new_active->link = BOND_LINK_UP;
1152 if (bond->params.mode == BOND_MODE_8023AD) {
1153 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1156 if ((bond->params.mode == BOND_MODE_TLB) ||
1157 (bond->params.mode == BOND_MODE_ALB)) {
1158 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1161 if (USES_PRIMARY(bond->params.mode)) {
1162 printk(KERN_INFO DRV_NAME
1163 ": %s: making interface %s the new "
1165 bond->dev->name, new_active->dev->name);
1170 if (USES_PRIMARY(bond->params.mode)) {
1171 bond_mc_swap(bond, new_active, old_active);
1174 if ((bond->params.mode == BOND_MODE_TLB) ||
1175 (bond->params.mode == BOND_MODE_ALB)) {
1176 bond_alb_handle_active_change(bond, new_active);
1178 bond_set_slave_inactive_flags(old_active);
1180 bond_set_slave_active_flags(new_active);
1182 bond->curr_active_slave = new_active;
1185 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1187 bond_set_slave_inactive_flags(old_active);
1191 bond_set_slave_active_flags(new_active);
1193 if (bond->params.fail_over_mac)
1194 bond_do_fail_over_mac(bond, new_active,
1197 bond->send_grat_arp = bond->params.num_grat_arp;
1198 if (!test_bit(__LINK_STATE_LINKWATCH_PENDING,
1199 &bond->curr_active_slave->dev->state)) {
1200 bond_send_gratuitous_arp(bond);
1201 bond->send_grat_arp--;
1203 dprintk("delaying gratuitous arp on %s\n",
1204 bond->curr_active_slave->dev->name);
1207 write_unlock_bh(&bond->curr_slave_lock);
1208 read_unlock(&bond->lock);
1210 netdev_bonding_change(bond->dev);
1212 read_lock(&bond->lock);
1213 write_lock_bh(&bond->curr_slave_lock);
1219 * bond_select_active_slave - select a new active slave, if needed
1220 * @bond: our bonding struct
1222 * This functions shoud be called when one of the following occurs:
1223 * - The old curr_active_slave has been released or lost its link.
1224 * - The primary_slave has got its link back.
1225 * - A slave has got its link back and there's no old curr_active_slave.
1227 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1229 void bond_select_active_slave(struct bonding *bond)
1231 struct slave *best_slave;
1234 best_slave = bond_find_best_slave(bond);
1235 if (best_slave != bond->curr_active_slave) {
1236 bond_change_active_slave(bond, best_slave);
1237 rv = bond_set_carrier(bond);
1241 if (netif_carrier_ok(bond->dev)) {
1242 printk(KERN_INFO DRV_NAME
1243 ": %s: first active interface up!\n",
1246 printk(KERN_INFO DRV_NAME ": %s: "
1247 "now running without any active interface !\n",
1253 /*--------------------------- slave list handling ---------------------------*/
1256 * This function attaches the slave to the end of list.
1258 * bond->lock held for writing by caller.
1260 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1262 if (bond->first_slave == NULL) { /* attaching the first slave */
1263 new_slave->next = new_slave;
1264 new_slave->prev = new_slave;
1265 bond->first_slave = new_slave;
1267 new_slave->next = bond->first_slave;
1268 new_slave->prev = bond->first_slave->prev;
1269 new_slave->next->prev = new_slave;
1270 new_slave->prev->next = new_slave;
1277 * This function detaches the slave from the list.
1278 * WARNING: no check is made to verify if the slave effectively
1279 * belongs to <bond>.
1280 * Nothing is freed on return, structures are just unchained.
1281 * If any slave pointer in bond was pointing to <slave>,
1282 * it should be changed by the calling function.
1284 * bond->lock held for writing by caller.
1286 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1289 slave->next->prev = slave->prev;
1293 slave->prev->next = slave->next;
1296 if (bond->first_slave == slave) { /* slave is the first slave */
1297 if (bond->slave_cnt > 1) { /* there are more slave */
1298 bond->first_slave = slave->next;
1300 bond->first_slave = NULL; /* slave was the last one */
1309 /*---------------------------------- IOCTL ----------------------------------*/
1311 static int bond_sethwaddr(struct net_device *bond_dev,
1312 struct net_device *slave_dev)
1314 dprintk("bond_dev=%p\n", bond_dev);
1315 dprintk("slave_dev=%p\n", slave_dev);
1316 dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1317 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1321 #define BOND_VLAN_FEATURES \
1322 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1323 NETIF_F_HW_VLAN_FILTER)
1326 * Compute the common dev->feature set available to all slaves. Some
1327 * feature bits are managed elsewhere, so preserve those feature bits
1328 * on the master device.
1330 static int bond_compute_features(struct bonding *bond)
1332 struct slave *slave;
1333 struct net_device *bond_dev = bond->dev;
1334 unsigned long features = bond_dev->features;
1335 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1336 bond_dev->hard_header_len);
1339 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1340 features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
1341 NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1343 bond_for_each_slave(bond, slave, i) {
1344 features = netdev_compute_features(features,
1345 slave->dev->features);
1346 if (slave->dev->hard_header_len > max_hard_header_len)
1347 max_hard_header_len = slave->dev->hard_header_len;
1350 features |= (bond_dev->features & BOND_VLAN_FEATURES);
1351 bond_dev->features = features;
1352 bond_dev->hard_header_len = max_hard_header_len;
1358 static void bond_setup_by_slave(struct net_device *bond_dev,
1359 struct net_device *slave_dev)
1361 struct bonding *bond = bond_dev->priv;
1363 bond_dev->neigh_setup = slave_dev->neigh_setup;
1364 bond_dev->header_ops = slave_dev->header_ops;
1366 bond_dev->type = slave_dev->type;
1367 bond_dev->hard_header_len = slave_dev->hard_header_len;
1368 bond_dev->addr_len = slave_dev->addr_len;
1370 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1371 slave_dev->addr_len);
1372 bond->setup_by_slave = 1;
1375 /* enslave device <slave> to bond device <master> */
1376 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1378 struct bonding *bond = bond_dev->priv;
1379 struct slave *new_slave = NULL;
1380 struct dev_mc_list *dmi;
1381 struct sockaddr addr;
1383 int old_features = bond_dev->features;
1386 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1387 slave_dev->do_ioctl == NULL) {
1388 printk(KERN_WARNING DRV_NAME
1389 ": %s: Warning: no link monitoring support for %s\n",
1390 bond_dev->name, slave_dev->name);
1393 /* bond must be initialized by bond_open() before enslaving */
1394 if (!(bond_dev->flags & IFF_UP)) {
1395 printk(KERN_WARNING DRV_NAME
1396 " %s: master_dev is not up in bond_enslave\n",
1400 /* already enslaved */
1401 if (slave_dev->flags & IFF_SLAVE) {
1402 dprintk("Error, Device was already enslaved\n");
1406 /* vlan challenged mutual exclusion */
1407 /* no need to lock since we're protected by rtnl_lock */
1408 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1409 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1410 if (!list_empty(&bond->vlan_list)) {
1411 printk(KERN_ERR DRV_NAME
1412 ": %s: Error: cannot enslave VLAN "
1413 "challenged slave %s on VLAN enabled "
1414 "bond %s\n", bond_dev->name, slave_dev->name,
1418 printk(KERN_WARNING DRV_NAME
1419 ": %s: Warning: enslaved VLAN challenged "
1420 "slave %s. Adding VLANs will be blocked as "
1421 "long as %s is part of bond %s\n",
1422 bond_dev->name, slave_dev->name, slave_dev->name,
1424 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1427 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1428 if (bond->slave_cnt == 0) {
1429 /* First slave, and it is not VLAN challenged,
1430 * so remove the block of adding VLANs over the bond.
1432 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1437 * Old ifenslave binaries are no longer supported. These can
1438 * be identified with moderate accurary by the state of the slave:
1439 * the current ifenslave will set the interface down prior to
1440 * enslaving it; the old ifenslave will not.
1442 if ((slave_dev->flags & IFF_UP)) {
1443 printk(KERN_ERR DRV_NAME ": %s is up. "
1444 "This may be due to an out of date ifenslave.\n",
1447 goto err_undo_flags;
1450 /* set bonding device ether type by slave - bonding netdevices are
1451 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1452 * there is a need to override some of the type dependent attribs/funcs.
1454 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1455 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1457 if (bond->slave_cnt == 0) {
1458 if (slave_dev->type != ARPHRD_ETHER)
1459 bond_setup_by_slave(bond_dev, slave_dev);
1460 } else if (bond_dev->type != slave_dev->type) {
1461 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1462 "from other slaves (%d), can not enslave it.\n",
1464 slave_dev->type, bond_dev->type);
1466 goto err_undo_flags;
1469 if (slave_dev->set_mac_address == NULL) {
1470 if (bond->slave_cnt == 0) {
1471 printk(KERN_WARNING DRV_NAME
1472 ": %s: Warning: The first slave device "
1473 "specified does not support setting the MAC "
1474 "address. Setting fail_over_mac to active.",
1476 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1477 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1478 printk(KERN_ERR DRV_NAME
1479 ": %s: Error: The slave device specified "
1480 "does not support setting the MAC address, "
1481 "but fail_over_mac is not set to active.\n"
1484 goto err_undo_flags;
1488 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1491 goto err_undo_flags;
1494 /* save slave's original flags before calling
1495 * netdev_set_master and dev_open
1497 new_slave->original_flags = slave_dev->flags;
1500 * Save slave's original ("permanent") mac address for modes
1501 * that need it, and for restoring it upon release, and then
1502 * set it to the master's address
1504 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1506 if (!bond->params.fail_over_mac) {
1508 * Set slave to master's mac address. The application already
1509 * set the master's mac address to that of the first slave
1511 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1512 addr.sa_family = slave_dev->type;
1513 res = dev_set_mac_address(slave_dev, &addr);
1515 dprintk("Error %d calling set_mac_address\n", res);
1520 res = netdev_set_master(slave_dev, bond_dev);
1522 dprintk("Error %d calling netdev_set_master\n", res);
1523 goto err_restore_mac;
1525 /* open the slave since the application closed it */
1526 res = dev_open(slave_dev);
1528 dprintk("Openning slave %s failed\n", slave_dev->name);
1529 goto err_unset_master;
1532 new_slave->dev = slave_dev;
1533 slave_dev->priv_flags |= IFF_BONDING;
1535 if ((bond->params.mode == BOND_MODE_TLB) ||
1536 (bond->params.mode == BOND_MODE_ALB)) {
1537 /* bond_alb_init_slave() must be called before all other stages since
1538 * it might fail and we do not want to have to undo everything
1540 res = bond_alb_init_slave(bond, new_slave);
1546 /* If the mode USES_PRIMARY, then the new slave gets the
1547 * master's promisc (and mc) settings only if it becomes the
1548 * curr_active_slave, and that is taken care of later when calling
1549 * bond_change_active()
1551 if (!USES_PRIMARY(bond->params.mode)) {
1552 /* set promiscuity level to new slave */
1553 if (bond_dev->flags & IFF_PROMISC) {
1554 dev_set_promiscuity(slave_dev, 1);
1557 /* set allmulti level to new slave */
1558 if (bond_dev->flags & IFF_ALLMULTI) {
1559 dev_set_allmulti(slave_dev, 1);
1562 netif_tx_lock_bh(bond_dev);
1563 /* upload master's mc_list to new slave */
1564 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1565 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1567 netif_tx_unlock_bh(bond_dev);
1570 if (bond->params.mode == BOND_MODE_8023AD) {
1571 /* add lacpdu mc addr to mc list */
1572 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1574 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1577 bond_add_vlans_on_slave(bond, slave_dev);
1579 write_lock_bh(&bond->lock);
1581 bond_attach_slave(bond, new_slave);
1583 new_slave->delay = 0;
1584 new_slave->link_failure_count = 0;
1586 bond_compute_features(bond);
1588 write_unlock_bh(&bond->lock);
1590 read_lock(&bond->lock);
1592 new_slave->last_arp_rx = jiffies;
1594 if (bond->params.miimon && !bond->params.use_carrier) {
1595 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1597 if ((link_reporting == -1) && !bond->params.arp_interval) {
1599 * miimon is set but a bonded network driver
1600 * does not support ETHTOOL/MII and
1601 * arp_interval is not set. Note: if
1602 * use_carrier is enabled, we will never go
1603 * here (because netif_carrier is always
1604 * supported); thus, we don't need to change
1605 * the messages for netif_carrier.
1607 printk(KERN_WARNING DRV_NAME
1608 ": %s: Warning: MII and ETHTOOL support not "
1609 "available for interface %s, and "
1610 "arp_interval/arp_ip_target module parameters "
1611 "not specified, thus bonding will not detect "
1612 "link failures! see bonding.txt for details.\n",
1613 bond_dev->name, slave_dev->name);
1614 } else if (link_reporting == -1) {
1615 /* unable get link status using mii/ethtool */
1616 printk(KERN_WARNING DRV_NAME
1617 ": %s: Warning: can't get link status from "
1618 "interface %s; the network driver associated "
1619 "with this interface does not support MII or "
1620 "ETHTOOL link status reporting, thus miimon "
1621 "has no effect on this interface.\n",
1622 bond_dev->name, slave_dev->name);
1626 /* check for initial state */
1627 if (!bond->params.miimon ||
1628 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1629 if (bond->params.updelay) {
1630 dprintk("Initial state of slave_dev is "
1631 "BOND_LINK_BACK\n");
1632 new_slave->link = BOND_LINK_BACK;
1633 new_slave->delay = bond->params.updelay;
1635 dprintk("Initial state of slave_dev is "
1637 new_slave->link = BOND_LINK_UP;
1639 new_slave->jiffies = jiffies;
1641 dprintk("Initial state of slave_dev is "
1642 "BOND_LINK_DOWN\n");
1643 new_slave->link = BOND_LINK_DOWN;
1646 if (bond_update_speed_duplex(new_slave) &&
1647 (new_slave->link != BOND_LINK_DOWN)) {
1648 printk(KERN_WARNING DRV_NAME
1649 ": %s: Warning: failed to get speed and duplex from %s, "
1650 "assumed to be 100Mb/sec and Full.\n",
1651 bond_dev->name, new_slave->dev->name);
1653 if (bond->params.mode == BOND_MODE_8023AD) {
1654 printk(KERN_WARNING DRV_NAME
1655 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1656 "support in base driver for proper aggregator "
1657 "selection.\n", bond_dev->name);
1661 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1662 /* if there is a primary slave, remember it */
1663 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1664 bond->primary_slave = new_slave;
1668 write_lock_bh(&bond->curr_slave_lock);
1670 switch (bond->params.mode) {
1671 case BOND_MODE_ACTIVEBACKUP:
1672 bond_set_slave_inactive_flags(new_slave);
1673 bond_select_active_slave(bond);
1675 case BOND_MODE_8023AD:
1676 /* in 802.3ad mode, the internal mechanism
1677 * will activate the slaves in the selected
1680 bond_set_slave_inactive_flags(new_slave);
1681 /* if this is the first slave */
1682 if (bond->slave_cnt == 1) {
1683 SLAVE_AD_INFO(new_slave).id = 1;
1684 /* Initialize AD with the number of times that the AD timer is called in 1 second
1685 * can be called only after the mac address of the bond is set
1687 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1688 bond->params.lacp_fast);
1690 SLAVE_AD_INFO(new_slave).id =
1691 SLAVE_AD_INFO(new_slave->prev).id + 1;
1694 bond_3ad_bind_slave(new_slave);
1698 new_slave->state = BOND_STATE_ACTIVE;
1699 bond_set_slave_inactive_flags(new_slave);
1702 dprintk("This slave is always active in trunk mode\n");
1704 /* always active in trunk mode */
1705 new_slave->state = BOND_STATE_ACTIVE;
1707 /* In trunking mode there is little meaning to curr_active_slave
1708 * anyway (it holds no special properties of the bond device),
1709 * so we can change it without calling change_active_interface()
1711 if (!bond->curr_active_slave) {
1712 bond->curr_active_slave = new_slave;
1715 } /* switch(bond_mode) */
1717 write_unlock_bh(&bond->curr_slave_lock);
1719 bond_set_carrier(bond);
1721 read_unlock(&bond->lock);
1723 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1727 printk(KERN_INFO DRV_NAME
1728 ": %s: enslaving %s as a%s interface with a%s link.\n",
1729 bond_dev->name, slave_dev->name,
1730 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1731 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1733 /* enslave is successful */
1736 /* Undo stages on error */
1738 dev_close(slave_dev);
1741 netdev_set_master(slave_dev, NULL);
1744 if (!bond->params.fail_over_mac) {
1745 /* XXX TODO - fom follow mode needs to change master's
1746 * MAC if this slave's MAC is in use by the bond, or at
1747 * least print a warning.
1749 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1750 addr.sa_family = slave_dev->type;
1751 dev_set_mac_address(slave_dev, &addr);
1758 bond_dev->features = old_features;
1764 * Try to release the slave device <slave> from the bond device <master>
1765 * It is legal to access curr_active_slave without a lock because all the function
1768 * The rules for slave state should be:
1769 * for Active/Backup:
1770 * Active stays on all backups go down
1771 * for Bonded connections:
1772 * The first up interface should be left on and all others downed.
1774 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1776 struct bonding *bond = bond_dev->priv;
1777 struct slave *slave, *oldcurrent;
1778 struct sockaddr addr;
1779 int mac_addr_differ;
1780 DECLARE_MAC_BUF(mac);
1782 /* slave is not a slave or master is not master of this slave */
1783 if (!(slave_dev->flags & IFF_SLAVE) ||
1784 (slave_dev->master != bond_dev)) {
1785 printk(KERN_ERR DRV_NAME
1786 ": %s: Error: cannot release %s.\n",
1787 bond_dev->name, slave_dev->name);
1791 write_lock_bh(&bond->lock);
1793 slave = bond_get_slave_by_dev(bond, slave_dev);
1795 /* not a slave of this bond */
1796 printk(KERN_INFO DRV_NAME
1797 ": %s: %s not enslaved\n",
1798 bond_dev->name, slave_dev->name);
1799 write_unlock_bh(&bond->lock);
1803 if (!bond->params.fail_over_mac) {
1804 mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr,
1806 if (!mac_addr_differ && (bond->slave_cnt > 1))
1807 printk(KERN_WARNING DRV_NAME
1808 ": %s: Warning: the permanent HWaddr of %s - "
1809 "%s - is still in use by %s. "
1810 "Set the HWaddr of %s to a different address "
1811 "to avoid conflicts.\n",
1812 bond_dev->name, slave_dev->name,
1813 print_mac(mac, slave->perm_hwaddr),
1814 bond_dev->name, slave_dev->name);
1817 /* Inform AD package of unbinding of slave. */
1818 if (bond->params.mode == BOND_MODE_8023AD) {
1819 /* must be called before the slave is
1820 * detached from the list
1822 bond_3ad_unbind_slave(slave);
1825 printk(KERN_INFO DRV_NAME
1826 ": %s: releasing %s interface %s\n",
1828 (slave->state == BOND_STATE_ACTIVE)
1829 ? "active" : "backup",
1832 oldcurrent = bond->curr_active_slave;
1834 bond->current_arp_slave = NULL;
1836 /* release the slave from its bond */
1837 bond_detach_slave(bond, slave);
1839 bond_compute_features(bond);
1841 if (bond->primary_slave == slave) {
1842 bond->primary_slave = NULL;
1845 if (oldcurrent == slave) {
1846 bond_change_active_slave(bond, NULL);
1849 if ((bond->params.mode == BOND_MODE_TLB) ||
1850 (bond->params.mode == BOND_MODE_ALB)) {
1851 /* Must be called only after the slave has been
1852 * detached from the list and the curr_active_slave
1853 * has been cleared (if our_slave == old_current),
1854 * but before a new active slave is selected.
1856 write_unlock_bh(&bond->lock);
1857 bond_alb_deinit_slave(bond, slave);
1858 write_lock_bh(&bond->lock);
1861 if (oldcurrent == slave) {
1863 * Note that we hold RTNL over this sequence, so there
1864 * is no concern that another slave add/remove event
1867 write_unlock_bh(&bond->lock);
1868 read_lock(&bond->lock);
1869 write_lock_bh(&bond->curr_slave_lock);
1871 bond_select_active_slave(bond);
1873 write_unlock_bh(&bond->curr_slave_lock);
1874 read_unlock(&bond->lock);
1875 write_lock_bh(&bond->lock);
1878 if (bond->slave_cnt == 0) {
1879 bond_set_carrier(bond);
1881 /* if the last slave was removed, zero the mac address
1882 * of the master so it will be set by the application
1883 * to the mac address of the first slave
1885 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1887 if (list_empty(&bond->vlan_list)) {
1888 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1890 printk(KERN_WARNING DRV_NAME
1891 ": %s: Warning: clearing HW address of %s while it "
1892 "still has VLANs.\n",
1893 bond_dev->name, bond_dev->name);
1894 printk(KERN_WARNING DRV_NAME
1895 ": %s: When re-adding slaves, make sure the bond's "
1896 "HW address matches its VLANs'.\n",
1899 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1900 !bond_has_challenged_slaves(bond)) {
1901 printk(KERN_INFO DRV_NAME
1902 ": %s: last VLAN challenged slave %s "
1903 "left bond %s. VLAN blocking is removed\n",
1904 bond_dev->name, slave_dev->name, bond_dev->name);
1905 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1908 write_unlock_bh(&bond->lock);
1910 /* must do this from outside any spinlocks */
1911 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1913 bond_del_vlans_from_slave(bond, slave_dev);
1915 /* If the mode USES_PRIMARY, then we should only remove its
1916 * promisc and mc settings if it was the curr_active_slave, but that was
1917 * already taken care of above when we detached the slave
1919 if (!USES_PRIMARY(bond->params.mode)) {
1920 /* unset promiscuity level from slave */
1921 if (bond_dev->flags & IFF_PROMISC) {
1922 dev_set_promiscuity(slave_dev, -1);
1925 /* unset allmulti level from slave */
1926 if (bond_dev->flags & IFF_ALLMULTI) {
1927 dev_set_allmulti(slave_dev, -1);
1930 /* flush master's mc_list from slave */
1931 netif_tx_lock_bh(bond_dev);
1932 bond_mc_list_flush(bond_dev, slave_dev);
1933 netif_tx_unlock_bh(bond_dev);
1936 netdev_set_master(slave_dev, NULL);
1938 /* close slave before restoring its mac address */
1939 dev_close(slave_dev);
1941 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1942 /* restore original ("permanent") mac address */
1943 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1944 addr.sa_family = slave_dev->type;
1945 dev_set_mac_address(slave_dev, &addr);
1948 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1949 IFF_SLAVE_INACTIVE | IFF_BONDING |
1954 return 0; /* deletion OK */
1958 * Destroy a bonding device.
1959 * Must be under rtnl_lock when this function is called.
1961 void bond_destroy(struct bonding *bond)
1963 bond_deinit(bond->dev);
1964 bond_destroy_sysfs_entry(bond);
1965 unregister_netdevice(bond->dev);
1969 * First release a slave and than destroy the bond if no more slaves iare left.
1970 * Must be under rtnl_lock when this function is called.
1972 int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1974 struct bonding *bond = bond_dev->priv;
1977 ret = bond_release(bond_dev, slave_dev);
1978 if ((ret == 0) && (bond->slave_cnt == 0)) {
1979 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1980 bond_dev->name, bond_dev->name);
1987 * This function releases all slaves.
1989 static int bond_release_all(struct net_device *bond_dev)
1991 struct bonding *bond = bond_dev->priv;
1992 struct slave *slave;
1993 struct net_device *slave_dev;
1994 struct sockaddr addr;
1996 write_lock_bh(&bond->lock);
1998 netif_carrier_off(bond_dev);
2000 if (bond->slave_cnt == 0) {
2004 bond->current_arp_slave = NULL;
2005 bond->primary_slave = NULL;
2006 bond_change_active_slave(bond, NULL);
2008 while ((slave = bond->first_slave) != NULL) {
2009 /* Inform AD package of unbinding of slave
2010 * before slave is detached from the list.
2012 if (bond->params.mode == BOND_MODE_8023AD) {
2013 bond_3ad_unbind_slave(slave);
2016 slave_dev = slave->dev;
2017 bond_detach_slave(bond, slave);
2019 /* now that the slave is detached, unlock and perform
2020 * all the undo steps that should not be called from
2023 write_unlock_bh(&bond->lock);
2025 if ((bond->params.mode == BOND_MODE_TLB) ||
2026 (bond->params.mode == BOND_MODE_ALB)) {
2027 /* must be called only after the slave
2028 * has been detached from the list
2030 bond_alb_deinit_slave(bond, slave);
2033 bond_compute_features(bond);
2035 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2036 bond_del_vlans_from_slave(bond, slave_dev);
2038 /* If the mode USES_PRIMARY, then we should only remove its
2039 * promisc and mc settings if it was the curr_active_slave, but that was
2040 * already taken care of above when we detached the slave
2042 if (!USES_PRIMARY(bond->params.mode)) {
2043 /* unset promiscuity level from slave */
2044 if (bond_dev->flags & IFF_PROMISC) {
2045 dev_set_promiscuity(slave_dev, -1);
2048 /* unset allmulti level from slave */
2049 if (bond_dev->flags & IFF_ALLMULTI) {
2050 dev_set_allmulti(slave_dev, -1);
2053 /* flush master's mc_list from slave */
2054 netif_tx_lock_bh(bond_dev);
2055 bond_mc_list_flush(bond_dev, slave_dev);
2056 netif_tx_unlock_bh(bond_dev);
2059 netdev_set_master(slave_dev, NULL);
2061 /* close slave before restoring its mac address */
2062 dev_close(slave_dev);
2064 if (!bond->params.fail_over_mac) {
2065 /* restore original ("permanent") mac address*/
2066 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2067 addr.sa_family = slave_dev->type;
2068 dev_set_mac_address(slave_dev, &addr);
2071 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2072 IFF_SLAVE_INACTIVE);
2076 /* re-acquire the lock before getting the next slave */
2077 write_lock_bh(&bond->lock);
2080 /* zero the mac address of the master so it will be
2081 * set by the application to the mac address of the
2084 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2086 if (list_empty(&bond->vlan_list)) {
2087 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2089 printk(KERN_WARNING DRV_NAME
2090 ": %s: Warning: clearing HW address of %s while it "
2091 "still has VLANs.\n",
2092 bond_dev->name, bond_dev->name);
2093 printk(KERN_WARNING DRV_NAME
2094 ": %s: When re-adding slaves, make sure the bond's "
2095 "HW address matches its VLANs'.\n",
2099 printk(KERN_INFO DRV_NAME
2100 ": %s: released all slaves\n",
2104 write_unlock_bh(&bond->lock);
2110 * This function changes the active slave to slave <slave_dev>.
2111 * It returns -EINVAL in the following cases.
2112 * - <slave_dev> is not found in the list.
2113 * - There is not active slave now.
2114 * - <slave_dev> is already active.
2115 * - The link state of <slave_dev> is not BOND_LINK_UP.
2116 * - <slave_dev> is not running.
2117 * In these cases, this fuction does nothing.
2118 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2120 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2122 struct bonding *bond = bond_dev->priv;
2123 struct slave *old_active = NULL;
2124 struct slave *new_active = NULL;
2127 if (!USES_PRIMARY(bond->params.mode)) {
2131 /* Verify that master_dev is indeed the master of slave_dev */
2132 if (!(slave_dev->flags & IFF_SLAVE) ||
2133 (slave_dev->master != bond_dev)) {
2137 read_lock(&bond->lock);
2139 read_lock(&bond->curr_slave_lock);
2140 old_active = bond->curr_active_slave;
2141 read_unlock(&bond->curr_slave_lock);
2143 new_active = bond_get_slave_by_dev(bond, slave_dev);
2146 * Changing to the current active: do nothing; return success.
2148 if (new_active && (new_active == old_active)) {
2149 read_unlock(&bond->lock);
2155 (new_active->link == BOND_LINK_UP) &&
2156 IS_UP(new_active->dev)) {
2157 write_lock_bh(&bond->curr_slave_lock);
2158 bond_change_active_slave(bond, new_active);
2159 write_unlock_bh(&bond->curr_slave_lock);
2164 read_unlock(&bond->lock);
2169 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2171 struct bonding *bond = bond_dev->priv;
2173 info->bond_mode = bond->params.mode;
2174 info->miimon = bond->params.miimon;
2176 read_lock(&bond->lock);
2177 info->num_slaves = bond->slave_cnt;
2178 read_unlock(&bond->lock);
2183 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2185 struct bonding *bond = bond_dev->priv;
2186 struct slave *slave;
2189 if (info->slave_id < 0) {
2193 read_lock(&bond->lock);
2195 bond_for_each_slave(bond, slave, i) {
2196 if (i == (int)info->slave_id) {
2202 read_unlock(&bond->lock);
2205 strcpy(info->slave_name, slave->dev->name);
2206 info->link = slave->link;
2207 info->state = slave->state;
2208 info->link_failure_count = slave->link_failure_count;
2216 /*-------------------------------- Monitoring -------------------------------*/
2219 * if !have_locks, return nonzero if a failover is necessary. if
2220 * have_locks, do whatever failover activities are needed.
2222 * This is to separate the inspection and failover steps for locking
2223 * purposes; failover requires rtnl, but acquiring it for every
2224 * inspection is undesirable, so a wrapper first does inspection, and
2225 * the acquires the necessary locks and calls again to perform
2226 * failover if needed. Since all locks are dropped, a complete
2227 * restart is needed between calls.
2229 static int __bond_mii_monitor(struct bonding *bond, int have_locks)
2231 struct slave *slave, *oldcurrent;
2232 int do_failover = 0;
2235 if (bond->slave_cnt == 0)
2238 /* we will try to read the link status of each of our slaves, and
2239 * set their IFF_RUNNING flag appropriately. For each slave not
2240 * supporting MII status, we won't do anything so that a user-space
2241 * program could monitor the link itself if needed.
2244 if (bond->send_grat_arp) {
2245 if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
2246 &bond->curr_active_slave->dev->state))
2247 dprintk("Needs to send gratuitous arp but not yet\n");
2249 dprintk("sending delayed gratuitous arp on on %s\n",
2250 bond->curr_active_slave->dev->name);
2251 bond_send_gratuitous_arp(bond);
2252 bond->send_grat_arp--;
2255 read_lock(&bond->curr_slave_lock);
2256 oldcurrent = bond->curr_active_slave;
2257 read_unlock(&bond->curr_slave_lock);
2259 bond_for_each_slave(bond, slave, i) {
2260 struct net_device *slave_dev = slave->dev;
2262 u16 old_speed = slave->speed;
2263 u8 old_duplex = slave->duplex;
2265 link_state = bond_check_dev_link(bond, slave_dev, 0);
2267 switch (slave->link) {
2268 case BOND_LINK_UP: /* the link was up */
2269 if (link_state == BMSR_LSTATUS) {
2276 } else { /* link going down */
2277 slave->link = BOND_LINK_FAIL;
2278 slave->delay = bond->params.downdelay;
2280 if (slave->link_failure_count < UINT_MAX) {
2281 slave->link_failure_count++;
2284 if (bond->params.downdelay) {
2285 printk(KERN_INFO DRV_NAME
2286 ": %s: link status down for %s "
2287 "interface %s, disabling it in "
2291 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2292 ? ((slave == oldcurrent)
2293 ? "active " : "backup ")
2297 bond->params.downdelay * bond->params.miimon);
2300 /* no break ! fall through the BOND_LINK_FAIL test to
2301 ensure proper action to be taken
2303 case BOND_LINK_FAIL: /* the link has just gone down */
2304 if (link_state != BMSR_LSTATUS) {
2305 /* link stays down */
2306 if (slave->delay <= 0) {
2310 /* link down for too long time */
2311 slave->link = BOND_LINK_DOWN;
2313 /* in active/backup mode, we must
2314 * completely disable this interface
2316 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2317 (bond->params.mode == BOND_MODE_8023AD)) {
2318 bond_set_slave_inactive_flags(slave);
2321 printk(KERN_INFO DRV_NAME
2322 ": %s: link status definitely "
2323 "down for interface %s, "
2328 /* notify ad that the link status has changed */
2329 if (bond->params.mode == BOND_MODE_8023AD) {
2330 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2333 if ((bond->params.mode == BOND_MODE_TLB) ||
2334 (bond->params.mode == BOND_MODE_ALB)) {
2335 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2338 if (slave == oldcurrent) {
2346 slave->link = BOND_LINK_UP;
2347 slave->jiffies = jiffies;
2348 printk(KERN_INFO DRV_NAME
2349 ": %s: link status up again after %d "
2350 "ms for interface %s.\n",
2352 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2356 case BOND_LINK_DOWN: /* the link was down */
2357 if (link_state != BMSR_LSTATUS) {
2358 /* the link stays down, nothing more to do */
2360 } else { /* link going up */
2361 slave->link = BOND_LINK_BACK;
2362 slave->delay = bond->params.updelay;
2364 if (bond->params.updelay) {
2365 /* if updelay == 0, no need to
2366 advertise about a 0 ms delay */
2367 printk(KERN_INFO DRV_NAME
2368 ": %s: link status up for "
2369 "interface %s, enabling it "
2373 bond->params.updelay * bond->params.miimon);
2376 /* no break ! fall through the BOND_LINK_BACK state in
2377 case there's something to do.
2379 case BOND_LINK_BACK: /* the link has just come back */
2380 if (link_state != BMSR_LSTATUS) {
2381 /* link down again */
2382 slave->link = BOND_LINK_DOWN;
2384 printk(KERN_INFO DRV_NAME
2385 ": %s: link status down again after %d "
2386 "ms for interface %s.\n",
2388 (bond->params.updelay - slave->delay) * bond->params.miimon,
2392 if (slave->delay == 0) {
2396 /* now the link has been up for long time enough */
2397 slave->link = BOND_LINK_UP;
2398 slave->jiffies = jiffies;
2400 if (bond->params.mode == BOND_MODE_8023AD) {
2401 /* prevent it from being the active one */
2402 slave->state = BOND_STATE_BACKUP;
2403 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2404 /* make it immediately active */
2405 slave->state = BOND_STATE_ACTIVE;
2406 } else if (slave != bond->primary_slave) {
2407 /* prevent it from being the active one */
2408 slave->state = BOND_STATE_BACKUP;
2411 printk(KERN_INFO DRV_NAME
2412 ": %s: link status definitely "
2413 "up for interface %s.\n",
2417 /* notify ad that the link status has changed */
2418 if (bond->params.mode == BOND_MODE_8023AD) {
2419 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2422 if ((bond->params.mode == BOND_MODE_TLB) ||
2423 (bond->params.mode == BOND_MODE_ALB)) {
2424 bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
2427 if ((!oldcurrent) ||
2428 (slave == bond->primary_slave)) {
2437 /* Should not happen */
2438 printk(KERN_ERR DRV_NAME
2439 ": %s: Error: %s Illegal value (link=%d)\n",
2444 } /* end of switch (slave->link) */
2446 bond_update_speed_duplex(slave);
2448 if (bond->params.mode == BOND_MODE_8023AD) {
2449 if (old_speed != slave->speed) {
2450 bond_3ad_adapter_speed_changed(slave);
2453 if (old_duplex != slave->duplex) {
2454 bond_3ad_adapter_duplex_changed(slave);
2463 write_lock_bh(&bond->curr_slave_lock);
2465 bond_select_active_slave(bond);
2467 write_unlock_bh(&bond->curr_slave_lock);
2470 bond_set_carrier(bond);
2479 * Really a wrapper that splits the mii monitor into two phases: an
2480 * inspection, then (if inspection indicates something needs to be
2481 * done) an acquisition of appropriate locks followed by another pass
2482 * to implement whatever link state changes are indicated.
2484 void bond_mii_monitor(struct work_struct *work)
2486 struct bonding *bond = container_of(work, struct bonding,
2488 unsigned long delay;
2490 read_lock(&bond->lock);
2491 if (bond->kill_timers) {
2492 read_unlock(&bond->lock);
2495 if (__bond_mii_monitor(bond, 0)) {
2496 read_unlock(&bond->lock);
2498 read_lock(&bond->lock);
2499 __bond_mii_monitor(bond, 1);
2500 read_unlock(&bond->lock);
2501 rtnl_unlock(); /* might sleep, hold no other locks */
2502 read_lock(&bond->lock);
2505 delay = msecs_to_jiffies(bond->params.miimon);
2506 read_unlock(&bond->lock);
2507 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2510 static __be32 bond_glean_dev_ip(struct net_device *dev)
2512 struct in_device *idev;
2513 struct in_ifaddr *ifa;
2520 idev = __in_dev_get_rcu(dev);
2524 ifa = idev->ifa_list;
2528 addr = ifa->ifa_local;
2534 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2536 struct vlan_entry *vlan;
2538 if (ip == bond->master_ip)
2541 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2542 if (ip == vlan->vlan_ip)
2550 * We go to the (large) trouble of VLAN tagging ARP frames because
2551 * switches in VLAN mode (especially if ports are configured as
2552 * "native" to a VLAN) might not pass non-tagged frames.
2554 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2556 struct sk_buff *skb;
2558 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2559 slave_dev->name, dest_ip, src_ip, vlan_id);
2561 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2562 NULL, slave_dev->dev_addr, NULL);
2565 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2569 skb = vlan_put_tag(skb, vlan_id);
2571 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2579 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2582 __be32 *targets = bond->params.arp_targets;
2583 struct vlan_entry *vlan;
2584 struct net_device *vlan_dev;
2588 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2591 dprintk("basa: target %x\n", targets[i]);
2592 if (list_empty(&bond->vlan_list)) {
2593 dprintk("basa: empty vlan: arp_send\n");
2594 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2595 bond->master_ip, 0);
2600 * If VLANs are configured, we do a route lookup to
2601 * determine which VLAN interface would be used, so we
2602 * can tag the ARP with the proper VLAN tag.
2604 memset(&fl, 0, sizeof(fl));
2605 fl.fl4_dst = targets[i];
2606 fl.fl4_tos = RTO_ONLINK;
2608 rv = ip_route_output_key(&init_net, &rt, &fl);
2610 if (net_ratelimit()) {
2611 printk(KERN_WARNING DRV_NAME
2612 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2613 bond->dev->name, NIPQUAD(fl.fl4_dst));
2619 * This target is not on a VLAN
2621 if (rt->u.dst.dev == bond->dev) {
2623 dprintk("basa: rtdev == bond->dev: arp_send\n");
2624 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2625 bond->master_ip, 0);
2630 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2631 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2632 if (vlan_dev == rt->u.dst.dev) {
2633 vlan_id = vlan->vlan_id;
2634 dprintk("basa: vlan match on %s %d\n",
2635 vlan_dev->name, vlan_id);
2642 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2643 vlan->vlan_ip, vlan_id);
2647 if (net_ratelimit()) {
2648 printk(KERN_WARNING DRV_NAME
2649 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2650 bond->dev->name, NIPQUAD(fl.fl4_dst),
2651 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2658 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2659 * for each VLAN above us.
2661 static void bond_send_gratuitous_arp(struct bonding *bond)
2663 struct slave *slave = bond->curr_active_slave;
2664 struct vlan_entry *vlan;
2665 struct net_device *vlan_dev;
2667 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2668 slave ? slave->dev->name : "NULL");
2672 if (bond->master_ip) {
2673 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2674 bond->master_ip, 0);
2677 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2678 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2679 if (vlan->vlan_ip) {
2680 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2681 vlan->vlan_ip, vlan->vlan_id);
2686 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2689 __be32 *targets = bond->params.arp_targets;
2691 targets = bond->params.arp_targets;
2692 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2693 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2694 "%u.%u.%u.%u bhti(tip) %d\n",
2695 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2696 bond_has_this_ip(bond, tip));
2697 if (sip == targets[i]) {
2698 if (bond_has_this_ip(bond, tip))
2699 slave->last_arp_rx = jiffies;
2705 static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2708 struct slave *slave;
2709 struct bonding *bond;
2710 unsigned char *arp_ptr;
2713 if (dev_net(dev) != &init_net)
2716 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2720 read_lock(&bond->lock);
2722 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2723 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2724 orig_dev ? orig_dev->name : "NULL");
2726 slave = bond_get_slave_by_dev(bond, orig_dev);
2727 if (!slave || !slave_do_arp_validate(bond, slave))
2730 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
2734 if (arp->ar_hln != dev->addr_len ||
2735 skb->pkt_type == PACKET_OTHERHOST ||
2736 skb->pkt_type == PACKET_LOOPBACK ||
2737 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2738 arp->ar_pro != htons(ETH_P_IP) ||
2742 arp_ptr = (unsigned char *)(arp + 1);
2743 arp_ptr += dev->addr_len;
2744 memcpy(&sip, arp_ptr, 4);
2745 arp_ptr += 4 + dev->addr_len;
2746 memcpy(&tip, arp_ptr, 4);
2748 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2749 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2750 slave->state, bond->params.arp_validate,
2751 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2754 * Backup slaves won't see the ARP reply, but do come through
2755 * here for each ARP probe (so we swap the sip/tip to validate
2756 * the probe). In a "redundant switch, common router" type of
2757 * configuration, the ARP probe will (hopefully) travel from
2758 * the active, through one switch, the router, then the other
2759 * switch before reaching the backup.
2761 if (slave->state == BOND_STATE_ACTIVE)
2762 bond_validate_arp(bond, slave, sip, tip);
2764 bond_validate_arp(bond, slave, tip, sip);
2767 read_unlock(&bond->lock);
2770 return NET_RX_SUCCESS;
2774 * this function is called regularly to monitor each slave's link
2775 * ensuring that traffic is being sent and received when arp monitoring
2776 * is used in load-balancing mode. if the adapter has been dormant, then an
2777 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2778 * arp monitoring in active backup mode.
2780 void bond_loadbalance_arp_mon(struct work_struct *work)
2782 struct bonding *bond = container_of(work, struct bonding,
2784 struct slave *slave, *oldcurrent;
2785 int do_failover = 0;
2789 read_lock(&bond->lock);
2791 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2793 if (bond->kill_timers) {
2797 if (bond->slave_cnt == 0) {
2801 read_lock(&bond->curr_slave_lock);
2802 oldcurrent = bond->curr_active_slave;
2803 read_unlock(&bond->curr_slave_lock);
2805 /* see if any of the previous devices are up now (i.e. they have
2806 * xmt and rcv traffic). the curr_active_slave does not come into
2807 * the picture unless it is null. also, slave->jiffies is not needed
2808 * here because we send an arp on each slave and give a slave as
2809 * long as it needs to get the tx/rx within the delta.
2810 * TODO: what about up/down delay in arp mode? it wasn't here before
2813 bond_for_each_slave(bond, slave, i) {
2814 if (slave->link != BOND_LINK_UP) {
2815 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2816 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
2818 slave->link = BOND_LINK_UP;
2819 slave->state = BOND_STATE_ACTIVE;
2821 /* primary_slave has no meaning in round-robin
2822 * mode. the window of a slave being up and
2823 * curr_active_slave being null after enslaving
2827 printk(KERN_INFO DRV_NAME
2828 ": %s: link status definitely "
2829 "up for interface %s, ",
2834 printk(KERN_INFO DRV_NAME
2835 ": %s: interface %s is now up\n",
2841 /* slave->link == BOND_LINK_UP */
2843 /* not all switches will respond to an arp request
2844 * when the source ip is 0, so don't take the link down
2845 * if we don't know our ip yet
2847 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
2848 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
2850 slave->link = BOND_LINK_DOWN;
2851 slave->state = BOND_STATE_BACKUP;
2853 if (slave->link_failure_count < UINT_MAX) {
2854 slave->link_failure_count++;
2857 printk(KERN_INFO DRV_NAME
2858 ": %s: interface %s is now down.\n",
2862 if (slave == oldcurrent) {
2868 /* note: if switch is in round-robin mode, all links
2869 * must tx arp to ensure all links rx an arp - otherwise
2870 * links may oscillate or not come up at all; if switch is
2871 * in something like xor mode, there is nothing we can
2872 * do - all replies will be rx'ed on same link causing slaves
2873 * to be unstable during low/no traffic periods
2875 if (IS_UP(slave->dev)) {
2876 bond_arp_send_all(bond, slave);
2881 write_lock_bh(&bond->curr_slave_lock);
2883 bond_select_active_slave(bond);
2885 write_unlock_bh(&bond->curr_slave_lock);
2889 if (bond->params.arp_interval)
2890 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2892 read_unlock(&bond->lock);
2896 * Called to inspect slaves for active-backup mode ARP monitor link state
2897 * changes. Sets new_link in slaves to specify what action should take
2898 * place for the slave. Returns 0 if no changes are found, >0 if changes
2899 * to link states must be committed.
2901 * Called with bond->lock held for read.
2903 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2905 struct slave *slave;
2908 bond_for_each_slave(bond, slave, i) {
2909 slave->new_link = BOND_LINK_NOCHANGE;
2911 if (slave->link != BOND_LINK_UP) {
2912 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2914 slave->new_link = BOND_LINK_UP;
2922 * Give slaves 2*delta after being enslaved or made
2923 * active. This avoids bouncing, as the last receive
2924 * times need a full ARP monitor cycle to be updated.
2926 if (!time_after_eq(jiffies, slave->jiffies +
2927 2 * delta_in_ticks))
2931 * Backup slave is down if:
2932 * - No current_arp_slave AND
2933 * - more than 3*delta since last receive AND
2934 * - the bond has an IP address
2936 * Note: a non-null current_arp_slave indicates
2937 * the curr_active_slave went down and we are
2938 * searching for a new one; under this condition
2939 * we only take the curr_active_slave down - this
2940 * gives each slave a chance to tx/rx traffic
2941 * before being taken out
2943 if (slave->state == BOND_STATE_BACKUP &&
2944 !bond->current_arp_slave &&
2945 time_after(jiffies, slave_last_rx(bond, slave) +
2946 3 * delta_in_ticks)) {
2947 slave->new_link = BOND_LINK_DOWN;
2952 * Active slave is down if:
2953 * - more than 2*delta since transmitting OR
2954 * - (more than 2*delta since receive AND
2955 * the bond has an IP address)
2957 if ((slave->state == BOND_STATE_ACTIVE) &&
2958 (time_after_eq(jiffies, slave->dev->trans_start +
2959 2 * delta_in_ticks) ||
2960 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2961 + 2 * delta_in_ticks)))) {
2962 slave->new_link = BOND_LINK_DOWN;
2967 read_lock(&bond->curr_slave_lock);
2970 * Trigger a commit if the primary option setting has changed.
2972 if (bond->primary_slave &&
2973 (bond->primary_slave != bond->curr_active_slave) &&
2974 (bond->primary_slave->link == BOND_LINK_UP))
2977 read_unlock(&bond->curr_slave_lock);
2983 * Called to commit link state changes noted by inspection step of
2984 * active-backup mode ARP monitor.
2986 * Called with RTNL and bond->lock for read.
2988 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2990 struct slave *slave;
2993 bond_for_each_slave(bond, slave, i) {
2994 switch (slave->new_link) {
2995 case BOND_LINK_NOCHANGE:
2999 write_lock_bh(&bond->curr_slave_lock);
3001 if (!bond->curr_active_slave &&
3002 time_before_eq(jiffies, slave->dev->trans_start +
3004 slave->link = BOND_LINK_UP;
3005 bond_change_active_slave(bond, slave);
3006 bond->current_arp_slave = NULL;
3008 printk(KERN_INFO DRV_NAME
3009 ": %s: %s is up and now the "
3010 "active interface\n",
3011 bond->dev->name, slave->dev->name);
3013 } else if (bond->curr_active_slave != slave) {
3014 /* this slave has just come up but we
3015 * already have a current slave; this can
3016 * also happen if bond_enslave adds a new
3017 * slave that is up while we are searching
3020 slave->link = BOND_LINK_UP;
3021 bond_set_slave_inactive_flags(slave);
3022 bond->current_arp_slave = NULL;
3024 printk(KERN_INFO DRV_NAME
3025 ": %s: backup interface %s is now up\n",
3026 bond->dev->name, slave->dev->name);
3029 write_unlock_bh(&bond->curr_slave_lock);
3033 case BOND_LINK_DOWN:
3034 if (slave->link_failure_count < UINT_MAX)
3035 slave->link_failure_count++;
3037 slave->link = BOND_LINK_DOWN;
3039 if (slave == bond->curr_active_slave) {
3040 printk(KERN_INFO DRV_NAME
3041 ": %s: link status down for active "
3042 "interface %s, disabling it\n",
3043 bond->dev->name, slave->dev->name);
3045 bond_set_slave_inactive_flags(slave);
3047 write_lock_bh(&bond->curr_slave_lock);
3049 bond_select_active_slave(bond);
3050 if (bond->curr_active_slave)
3051 bond->curr_active_slave->jiffies =
3054 write_unlock_bh(&bond->curr_slave_lock);
3056 bond->current_arp_slave = NULL;
3058 } else if (slave->state == BOND_STATE_BACKUP) {
3059 printk(KERN_INFO DRV_NAME
3060 ": %s: backup interface %s is now down\n",
3061 bond->dev->name, slave->dev->name);
3063 bond_set_slave_inactive_flags(slave);
3068 printk(KERN_ERR DRV_NAME
3069 ": %s: impossible: new_link %d on slave %s\n",
3070 bond->dev->name, slave->new_link,
3076 * No race with changes to primary via sysfs, as we hold rtnl.
3078 if (bond->primary_slave &&
3079 (bond->primary_slave != bond->curr_active_slave) &&
3080 (bond->primary_slave->link == BOND_LINK_UP)) {
3081 write_lock_bh(&bond->curr_slave_lock);
3082 bond_change_active_slave(bond, bond->primary_slave);
3083 write_unlock_bh(&bond->curr_slave_lock);
3086 bond_set_carrier(bond);
3090 * Send ARP probes for active-backup mode ARP monitor.
3092 * Called with bond->lock held for read.
3094 static void bond_ab_arp_probe(struct bonding *bond)
3096 struct slave *slave;
3099 read_lock(&bond->curr_slave_lock);
3101 if (bond->current_arp_slave && bond->curr_active_slave)
3102 printk("PROBE: c_arp %s && cas %s BAD\n",
3103 bond->current_arp_slave->dev->name,
3104 bond->curr_active_slave->dev->name);
3106 if (bond->curr_active_slave) {
3107 bond_arp_send_all(bond, bond->curr_active_slave);
3108 read_unlock(&bond->curr_slave_lock);
3112 read_unlock(&bond->curr_slave_lock);
3114 /* if we don't have a curr_active_slave, search for the next available
3115 * backup slave from the current_arp_slave and make it the candidate
3116 * for becoming the curr_active_slave
3119 if (!bond->current_arp_slave) {
3120 bond->current_arp_slave = bond->first_slave;
3121 if (!bond->current_arp_slave)
3125 bond_set_slave_inactive_flags(bond->current_arp_slave);
3127 /* search for next candidate */
3128 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3129 if (IS_UP(slave->dev)) {
3130 slave->link = BOND_LINK_BACK;
3131 bond_set_slave_active_flags(slave);
3132 bond_arp_send_all(bond, slave);
3133 slave->jiffies = jiffies;
3134 bond->current_arp_slave = slave;
3138 /* if the link state is up at this point, we
3139 * mark it down - this can happen if we have
3140 * simultaneous link failures and
3141 * reselect_active_interface doesn't make this
3142 * one the current slave so it is still marked
3143 * up when it is actually down
3145 if (slave->link == BOND_LINK_UP) {
3146 slave->link = BOND_LINK_DOWN;
3147 if (slave->link_failure_count < UINT_MAX)
3148 slave->link_failure_count++;
3150 bond_set_slave_inactive_flags(slave);
3152 printk(KERN_INFO DRV_NAME
3153 ": %s: backup interface %s is now down.\n",
3154 bond->dev->name, slave->dev->name);
3159 void bond_activebackup_arp_mon(struct work_struct *work)
3161 struct bonding *bond = container_of(work, struct bonding,
3165 read_lock(&bond->lock);
3167 if (bond->kill_timers)
3170 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3172 if (bond->slave_cnt == 0)
3175 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3176 read_unlock(&bond->lock);
3178 read_lock(&bond->lock);
3180 bond_ab_arp_commit(bond, delta_in_ticks);
3182 read_unlock(&bond->lock);
3184 read_lock(&bond->lock);
3187 bond_ab_arp_probe(bond);
3190 if (bond->params.arp_interval) {
3191 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3194 read_unlock(&bond->lock);
3197 /*------------------------------ proc/seq_file-------------------------------*/
3199 #ifdef CONFIG_PROC_FS
3201 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3203 struct bonding *bond = seq->private;
3205 struct slave *slave;
3208 /* make sure the bond won't be taken away */
3209 read_lock(&dev_base_lock);
3210 read_lock(&bond->lock);
3213 return SEQ_START_TOKEN;
3216 bond_for_each_slave(bond, slave, i) {
3217 if (++off == *pos) {
3225 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3227 struct bonding *bond = seq->private;
3228 struct slave *slave = v;
3231 if (v == SEQ_START_TOKEN) {
3232 return bond->first_slave;
3235 slave = slave->next;
3237 return (slave == bond->first_slave) ? NULL : slave;
3240 static void bond_info_seq_stop(struct seq_file *seq, void *v)
3242 struct bonding *bond = seq->private;
3244 read_unlock(&bond->lock);
3245 read_unlock(&dev_base_lock);
3248 static void bond_info_show_master(struct seq_file *seq)
3250 struct bonding *bond = seq->private;
3255 read_lock(&bond->curr_slave_lock);
3256 curr = bond->curr_active_slave;
3257 read_unlock(&bond->curr_slave_lock);
3259 seq_printf(seq, "Bonding Mode: %s",
3260 bond_mode_name(bond->params.mode));
3262 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3263 bond->params.fail_over_mac)
3264 seq_printf(seq, " (fail_over_mac %s)",
3265 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
3267 seq_printf(seq, "\n");
3269 if (bond->params.mode == BOND_MODE_XOR ||
3270 bond->params.mode == BOND_MODE_8023AD) {
3271 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3272 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3273 bond->params.xmit_policy);
3276 if (USES_PRIMARY(bond->params.mode)) {
3277 seq_printf(seq, "Primary Slave: %s\n",
3278 (bond->primary_slave) ?
3279 bond->primary_slave->dev->name : "None");
3281 seq_printf(seq, "Currently Active Slave: %s\n",
3282 (curr) ? curr->dev->name : "None");
3285 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3287 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3288 seq_printf(seq, "Up Delay (ms): %d\n",
3289 bond->params.updelay * bond->params.miimon);
3290 seq_printf(seq, "Down Delay (ms): %d\n",
3291 bond->params.downdelay * bond->params.miimon);
3294 /* ARP information */
3295 if(bond->params.arp_interval > 0) {
3297 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3298 bond->params.arp_interval);
3300 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3302 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3303 if (!bond->params.arp_targets[i])
3306 seq_printf(seq, ",");
3307 target = ntohl(bond->params.arp_targets[i]);
3308 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3311 seq_printf(seq, "\n");
3314 if (bond->params.mode == BOND_MODE_8023AD) {
3315 struct ad_info ad_info;
3316 DECLARE_MAC_BUF(mac);
3318 seq_puts(seq, "\n802.3ad info\n");
3319 seq_printf(seq, "LACP rate: %s\n",
3320 (bond->params.lacp_fast) ? "fast" : "slow");
3322 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3323 seq_printf(seq, "bond %s has no active aggregator\n",
3326 seq_printf(seq, "Active Aggregator Info:\n");
3328 seq_printf(seq, "\tAggregator ID: %d\n",
3329 ad_info.aggregator_id);
3330 seq_printf(seq, "\tNumber of ports: %d\n",
3332 seq_printf(seq, "\tActor Key: %d\n",
3334 seq_printf(seq, "\tPartner Key: %d\n",
3335 ad_info.partner_key);
3336 seq_printf(seq, "\tPartner Mac Address: %s\n",
3337 print_mac(mac, ad_info.partner_system));
3342 static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3344 struct bonding *bond = seq->private;
3345 DECLARE_MAC_BUF(mac);
3347 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3348 seq_printf(seq, "MII Status: %s\n",
3349 (slave->link == BOND_LINK_UP) ? "up" : "down");
3350 seq_printf(seq, "Link Failure Count: %u\n",
3351 slave->link_failure_count);
3354 "Permanent HW addr: %s\n",
3355 print_mac(mac, slave->perm_hwaddr));
3357 if (bond->params.mode == BOND_MODE_8023AD) {
3358 const struct aggregator *agg
3359 = SLAVE_AD_INFO(slave).port.aggregator;
3362 seq_printf(seq, "Aggregator ID: %d\n",
3363 agg->aggregator_identifier);
3365 seq_puts(seq, "Aggregator ID: N/A\n");
3370 static int bond_info_seq_show(struct seq_file *seq, void *v)
3372 if (v == SEQ_START_TOKEN) {
3373 seq_printf(seq, "%s\n", version);
3374 bond_info_show_master(seq);
3376 bond_info_show_slave(seq, v);
3382 static struct seq_operations bond_info_seq_ops = {
3383 .start = bond_info_seq_start,
3384 .next = bond_info_seq_next,
3385 .stop = bond_info_seq_stop,
3386 .show = bond_info_seq_show,
3389 static int bond_info_open(struct inode *inode, struct file *file)
3391 struct seq_file *seq;
3392 struct proc_dir_entry *proc;
3395 res = seq_open(file, &bond_info_seq_ops);
3397 /* recover the pointer buried in proc_dir_entry data */
3398 seq = file->private_data;
3400 seq->private = proc->data;
3406 static const struct file_operations bond_info_fops = {
3407 .owner = THIS_MODULE,
3408 .open = bond_info_open,
3410 .llseek = seq_lseek,
3411 .release = seq_release,
3414 static int bond_create_proc_entry(struct bonding *bond)
3416 struct net_device *bond_dev = bond->dev;
3418 if (bond_proc_dir) {
3419 bond->proc_entry = proc_create_data(bond_dev->name,
3420 S_IRUGO, bond_proc_dir,
3421 &bond_info_fops, bond);
3422 if (bond->proc_entry == NULL) {
3423 printk(KERN_WARNING DRV_NAME
3424 ": Warning: Cannot create /proc/net/%s/%s\n",
3425 DRV_NAME, bond_dev->name);
3427 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3434 static void bond_remove_proc_entry(struct bonding *bond)
3436 if (bond_proc_dir && bond->proc_entry) {
3437 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3438 memset(bond->proc_file_name, 0, IFNAMSIZ);
3439 bond->proc_entry = NULL;
3443 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3444 * Caller must hold rtnl_lock.
3446 static void bond_create_proc_dir(void)
3448 int len = strlen(DRV_NAME);
3450 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
3451 bond_proc_dir = bond_proc_dir->next) {
3452 if ((bond_proc_dir->namelen == len) &&
3453 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3458 if (!bond_proc_dir) {
3459 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
3460 if (bond_proc_dir) {
3461 bond_proc_dir->owner = THIS_MODULE;
3463 printk(KERN_WARNING DRV_NAME
3464 ": Warning: cannot create /proc/net/%s\n",
3470 /* Destroy the bonding directory under /proc/net, if empty.
3471 * Caller must hold rtnl_lock.
3473 static void bond_destroy_proc_dir(void)
3475 struct proc_dir_entry *de;
3477 if (!bond_proc_dir) {
3481 /* verify that the /proc dir is empty */
3482 for (de = bond_proc_dir->subdir; de; de = de->next) {
3483 /* ignore . and .. */
3484 if (*(de->name) != '.') {
3490 if (bond_proc_dir->owner == THIS_MODULE) {
3491 bond_proc_dir->owner = NULL;
3494 remove_proc_entry(DRV_NAME, init_net.proc_net);
3495 bond_proc_dir = NULL;
3498 #endif /* CONFIG_PROC_FS */
3500 /*-------------------------- netdev event handling --------------------------*/
3503 * Change device name
3505 static int bond_event_changename(struct bonding *bond)
3507 #ifdef CONFIG_PROC_FS
3508 bond_remove_proc_entry(bond);
3509 bond_create_proc_entry(bond);
3511 down_write(&(bonding_rwsem));
3512 bond_destroy_sysfs_entry(bond);
3513 bond_create_sysfs_entry(bond);
3514 up_write(&(bonding_rwsem));
3518 static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3520 struct bonding *event_bond = bond_dev->priv;
3523 case NETDEV_CHANGENAME:
3524 return bond_event_changename(event_bond);
3525 case NETDEV_UNREGISTER:
3526 bond_release_all(event_bond->dev);
3535 static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3537 struct net_device *bond_dev = slave_dev->master;
3538 struct bonding *bond = bond_dev->priv;
3541 case NETDEV_UNREGISTER:
3543 if (bond->setup_by_slave)
3544 bond_release_and_destroy(bond_dev, slave_dev);
3546 bond_release(bond_dev, slave_dev);
3551 * TODO: is this what we get if somebody
3552 * sets up a hierarchical bond, then rmmod's
3553 * one of the slave bonding devices?
3558 * ... Or is it this?
3561 case NETDEV_CHANGEMTU:
3563 * TODO: Should slaves be allowed to
3564 * independently alter their MTU? For
3565 * an active-backup bond, slaves need
3566 * not be the same type of device, so
3567 * MTUs may vary. For other modes,
3568 * slaves arguably should have the
3569 * same MTUs. To do this, we'd need to
3570 * take over the slave's change_mtu
3571 * function for the duration of their
3575 case NETDEV_CHANGENAME:
3577 * TODO: handle changing the primary's name
3580 case NETDEV_FEAT_CHANGE:
3581 bond_compute_features(bond);
3591 * bond_netdev_event: handle netdev notifier chain events.
3593 * This function receives events for the netdev chain. The caller (an
3594 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3595 * locks for us to safely manipulate the slave devices (RTNL lock,
3598 static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3600 struct net_device *event_dev = (struct net_device *)ptr;
3602 if (dev_net(event_dev) != &init_net)
3605 dprintk("event_dev: %s, event: %lx\n",
3606 (event_dev ? event_dev->name : "None"),
3609 if (!(event_dev->priv_flags & IFF_BONDING))
3612 if (event_dev->flags & IFF_MASTER) {
3613 dprintk("IFF_MASTER\n");
3614 return bond_master_netdev_event(event, event_dev);
3617 if (event_dev->flags & IFF_SLAVE) {
3618 dprintk("IFF_SLAVE\n");
3619 return bond_slave_netdev_event(event, event_dev);
3626 * bond_inetaddr_event: handle inetaddr notifier chain events.
3628 * We keep track of device IPs primarily to use as source addresses in
3629 * ARP monitor probes (rather than spewing out broadcasts all the time).
3631 * We track one IP for the main device (if it has one), plus one per VLAN.
3633 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3635 struct in_ifaddr *ifa = ptr;
3636 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3637 struct bonding *bond;
3638 struct vlan_entry *vlan;
3640 if (dev_net(ifa->ifa_dev->dev) != &init_net)
3643 list_for_each_entry(bond, &bond_dev_list, bond_list) {
3644 if (bond->dev == event_dev) {
3647 bond->master_ip = ifa->ifa_local;
3650 bond->master_ip = bond_glean_dev_ip(bond->dev);
3657 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3658 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
3659 if (vlan_dev == event_dev) {
3662 vlan->vlan_ip = ifa->ifa_local;
3666 bond_glean_dev_ip(vlan_dev);
3677 static struct notifier_block bond_netdev_notifier = {
3678 .notifier_call = bond_netdev_event,
3681 static struct notifier_block bond_inetaddr_notifier = {
3682 .notifier_call = bond_inetaddr_event,
3685 /*-------------------------- Packet type handling ---------------------------*/
3687 /* register to receive lacpdus on a bond */
3688 static void bond_register_lacpdu(struct bonding *bond)
3690 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3692 /* initialize packet type */
3693 pk_type->type = PKT_TYPE_LACPDU;
3694 pk_type->dev = bond->dev;
3695 pk_type->func = bond_3ad_lacpdu_recv;
3697 dev_add_pack(pk_type);
3700 /* unregister to receive lacpdus on a bond */
3701 static void bond_unregister_lacpdu(struct bonding *bond)
3703 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3706 void bond_register_arp(struct bonding *bond)
3708 struct packet_type *pt = &bond->arp_mon_pt;
3713 pt->type = htons(ETH_P_ARP);
3714 pt->dev = bond->dev;
3715 pt->func = bond_arp_rcv;
3719 void bond_unregister_arp(struct bonding *bond)
3721 struct packet_type *pt = &bond->arp_mon_pt;
3723 dev_remove_pack(pt);
3727 /*---------------------------- Hashing Policies -----------------------------*/
3730 * Hash for the output device based upon layer 2 and layer 3 data. If
3731 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3733 static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3734 struct net_device *bond_dev, int count)
3736 struct ethhdr *data = (struct ethhdr *)skb->data;
3737 struct iphdr *iph = ip_hdr(skb);
3739 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3740 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3741 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3744 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3748 * Hash for the output device based upon layer 3 and layer 4 data. If
3749 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3750 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3752 static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3753 struct net_device *bond_dev, int count)
3755 struct ethhdr *data = (struct ethhdr *)skb->data;
3756 struct iphdr *iph = ip_hdr(skb);
3757 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3760 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3761 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3762 (iph->protocol == IPPROTO_TCP ||
3763 iph->protocol == IPPROTO_UDP)) {
3764 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3766 return (layer4_xor ^
3767 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3771 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3775 * Hash for the output device based upon layer 2 data
3777 static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3778 struct net_device *bond_dev, int count)
3780 struct ethhdr *data = (struct ethhdr *)skb->data;
3782 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3785 /*-------------------------- Device entry points ----------------------------*/
3787 static int bond_open(struct net_device *bond_dev)
3789 struct bonding *bond = bond_dev->priv;
3791 bond->kill_timers = 0;
3793 if ((bond->params.mode == BOND_MODE_TLB) ||
3794 (bond->params.mode == BOND_MODE_ALB)) {
3795 /* bond_alb_initialize must be called before the timer
3798 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3799 /* something went wrong - fail the open operation */
3803 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3804 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3807 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3808 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3809 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3812 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3813 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3814 INIT_DELAYED_WORK(&bond->arp_work,
3815 bond_activebackup_arp_mon);
3817 INIT_DELAYED_WORK(&bond->arp_work,
3818 bond_loadbalance_arp_mon);
3820 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3821 if (bond->params.arp_validate)
3822 bond_register_arp(bond);
3825 if (bond->params.mode == BOND_MODE_8023AD) {
3826 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3827 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3828 /* register to receive LACPDUs */
3829 bond_register_lacpdu(bond);
3835 static int bond_close(struct net_device *bond_dev)
3837 struct bonding *bond = bond_dev->priv;
3839 if (bond->params.mode == BOND_MODE_8023AD) {
3840 /* Unregister the receive of LACPDUs */
3841 bond_unregister_lacpdu(bond);
3844 if (bond->params.arp_validate)
3845 bond_unregister_arp(bond);
3847 write_lock_bh(&bond->lock);
3850 /* signal timers not to re-arm */
3851 bond->kill_timers = 1;
3853 write_unlock_bh(&bond->lock);
3855 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3856 cancel_delayed_work(&bond->mii_work);
3859 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3860 cancel_delayed_work(&bond->arp_work);
3863 switch (bond->params.mode) {
3864 case BOND_MODE_8023AD:
3865 cancel_delayed_work(&bond->ad_work);
3869 cancel_delayed_work(&bond->alb_work);
3876 if ((bond->params.mode == BOND_MODE_TLB) ||
3877 (bond->params.mode == BOND_MODE_ALB)) {
3878 /* Must be called only after all
3879 * slaves have been released
3881 bond_alb_deinitialize(bond);
3887 static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3889 struct bonding *bond = bond_dev->priv;
3890 struct net_device_stats *stats = &(bond->stats), *sstats;
3891 struct net_device_stats local_stats;
3892 struct slave *slave;
3895 memset(&local_stats, 0, sizeof(struct net_device_stats));
3897 read_lock_bh(&bond->lock);
3899 bond_for_each_slave(bond, slave, i) {
3900 sstats = slave->dev->get_stats(slave->dev);
3901 local_stats.rx_packets += sstats->rx_packets;
3902 local_stats.rx_bytes += sstats->rx_bytes;
3903 local_stats.rx_errors += sstats->rx_errors;
3904 local_stats.rx_dropped += sstats->rx_dropped;
3906 local_stats.tx_packets += sstats->tx_packets;
3907 local_stats.tx_bytes += sstats->tx_bytes;
3908 local_stats.tx_errors += sstats->tx_errors;
3909 local_stats.tx_dropped += sstats->tx_dropped;
3911 local_stats.multicast += sstats->multicast;
3912 local_stats.collisions += sstats->collisions;
3914 local_stats.rx_length_errors += sstats->rx_length_errors;
3915 local_stats.rx_over_errors += sstats->rx_over_errors;
3916 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3917 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3918 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3919 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3921 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3922 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3923 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3924 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3925 local_stats.tx_window_errors += sstats->tx_window_errors;
3928 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
3930 read_unlock_bh(&bond->lock);
3935 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3937 struct net_device *slave_dev = NULL;
3938 struct ifbond k_binfo;
3939 struct ifbond __user *u_binfo = NULL;
3940 struct ifslave k_sinfo;
3941 struct ifslave __user *u_sinfo = NULL;
3942 struct mii_ioctl_data *mii = NULL;
3945 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3946 bond_dev->name, cmd);
3958 * We do this again just in case we were called by SIOCGMIIREG
3959 * instead of SIOCGMIIPHY.
3966 if (mii->reg_num == 1) {
3967 struct bonding *bond = bond_dev->priv;
3969 read_lock(&bond->lock);
3970 read_lock(&bond->curr_slave_lock);
3971 if (netif_carrier_ok(bond->dev)) {
3972 mii->val_out = BMSR_LSTATUS;
3974 read_unlock(&bond->curr_slave_lock);
3975 read_unlock(&bond->lock);
3979 case BOND_INFO_QUERY_OLD:
3980 case SIOCBONDINFOQUERY:
3981 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3983 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3987 res = bond_info_query(bond_dev, &k_binfo);
3989 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3995 case BOND_SLAVE_INFO_QUERY_OLD:
3996 case SIOCBONDSLAVEINFOQUERY:
3997 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3999 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
4003 res = bond_slave_info_query(bond_dev, &k_sinfo);
4005 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
4016 if (!capable(CAP_NET_ADMIN)) {
4020 down_write(&(bonding_rwsem));
4021 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
4023 dprintk("slave_dev=%p: \n", slave_dev);
4028 dprintk("slave_dev->name=%s: \n", slave_dev->name);
4030 case BOND_ENSLAVE_OLD:
4031 case SIOCBONDENSLAVE:
4032 res = bond_enslave(bond_dev, slave_dev);
4034 case BOND_RELEASE_OLD:
4035 case SIOCBONDRELEASE:
4036 res = bond_release(bond_dev, slave_dev);
4038 case BOND_SETHWADDR_OLD:
4039 case SIOCBONDSETHWADDR:
4040 res = bond_sethwaddr(bond_dev, slave_dev);
4042 case BOND_CHANGE_ACTIVE_OLD:
4043 case SIOCBONDCHANGEACTIVE:
4044 res = bond_ioctl_change_active(bond_dev, slave_dev);
4053 up_write(&(bonding_rwsem));
4057 static void bond_set_multicast_list(struct net_device *bond_dev)
4059 struct bonding *bond = bond_dev->priv;
4060 struct dev_mc_list *dmi;
4063 * Do promisc before checking multicast_mode
4065 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
4066 bond_set_promiscuity(bond, 1);
4069 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
4070 bond_set_promiscuity(bond, -1);
4073 /* set allmulti flag to slaves */
4074 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
4075 bond_set_allmulti(bond, 1);
4078 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
4079 bond_set_allmulti(bond, -1);
4082 read_lock(&bond->lock);
4084 bond->flags = bond_dev->flags;
4086 /* looking for addresses to add to slaves' mc list */
4087 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4088 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
4089 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4093 /* looking for addresses to delete from slaves' list */
4094 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4095 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
4096 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4100 /* save master's multicast list */
4101 bond_mc_list_destroy(bond);
4102 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4104 read_unlock(&bond->lock);
4108 * Change the MTU of all of a master's slaves to match the master
4110 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4112 struct bonding *bond = bond_dev->priv;
4113 struct slave *slave, *stop_at;
4117 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
4118 (bond_dev ? bond_dev->name : "None"), new_mtu);
4120 /* Can't hold bond->lock with bh disabled here since
4121 * some base drivers panic. On the other hand we can't
4122 * hold bond->lock without bh disabled because we'll
4123 * deadlock. The only solution is to rely on the fact
4124 * that we're under rtnl_lock here, and the slaves
4125 * list won't change. This doesn't solve the problem
4126 * of setting the slave's MTU while it is
4127 * transmitting, but the assumption is that the base
4128 * driver can handle that.
4130 * TODO: figure out a way to safely iterate the slaves
4131 * list, but without holding a lock around the actual
4132 * call to the base driver.
4135 bond_for_each_slave(bond, slave, i) {
4136 dprintk("s %p s->p %p c_m %p\n", slave,
4137 slave->prev, slave->dev->change_mtu);
4139 res = dev_set_mtu(slave->dev, new_mtu);
4142 /* If we failed to set the slave's mtu to the new value
4143 * we must abort the operation even in ACTIVE_BACKUP
4144 * mode, because if we allow the backup slaves to have
4145 * different mtu values than the active slave we'll
4146 * need to change their mtu when doing a failover. That
4147 * means changing their mtu from timer context, which
4148 * is probably not a good idea.
4150 dprintk("err %d %s\n", res, slave->dev->name);
4155 bond_dev->mtu = new_mtu;
4160 /* unwind from head to the slave that failed */
4162 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4165 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4167 dprintk("unwind err %d dev %s\n", tmp_res,
4178 * Note that many devices must be down to change the HW address, and
4179 * downing the master releases all slaves. We can make bonds full of
4180 * bonding devices to test this, however.
4182 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4184 struct bonding *bond = bond_dev->priv;
4185 struct sockaddr *sa = addr, tmp_sa;
4186 struct slave *slave, *stop_at;
4190 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4193 * If fail_over_mac is set to active, do nothing and return
4194 * success. Returning an error causes ifenslave to fail.
4196 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
4199 if (!is_valid_ether_addr(sa->sa_data)) {
4200 return -EADDRNOTAVAIL;
4203 /* Can't hold bond->lock with bh disabled here since
4204 * some base drivers panic. On the other hand we can't
4205 * hold bond->lock without bh disabled because we'll
4206 * deadlock. The only solution is to rely on the fact
4207 * that we're under rtnl_lock here, and the slaves
4208 * list won't change. This doesn't solve the problem
4209 * of setting the slave's hw address while it is
4210 * transmitting, but the assumption is that the base
4211 * driver can handle that.
4213 * TODO: figure out a way to safely iterate the slaves
4214 * list, but without holding a lock around the actual
4215 * call to the base driver.
4218 bond_for_each_slave(bond, slave, i) {
4219 dprintk("slave %p %s\n", slave, slave->dev->name);
4221 if (slave->dev->set_mac_address == NULL) {
4223 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4227 res = dev_set_mac_address(slave->dev, addr);
4229 /* TODO: consider downing the slave
4231 * User should expect communications
4232 * breakage anyway until ARP finish
4235 dprintk("err %d %s\n", res, slave->dev->name);
4241 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4245 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4246 tmp_sa.sa_family = bond_dev->type;
4248 /* unwind from head to the slave that failed */
4250 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4253 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4255 dprintk("unwind err %d dev %s\n", tmp_res,
4263 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4265 struct bonding *bond = bond_dev->priv;
4266 struct slave *slave, *start_at;
4267 int i, slave_no, res = 1;
4269 read_lock(&bond->lock);
4271 if (!BOND_IS_OK(bond)) {
4276 * Concurrent TX may collide on rr_tx_counter; we accept that
4277 * as being rare enough not to justify using an atomic op here
4279 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4281 bond_for_each_slave(bond, slave, i) {
4289 bond_for_each_slave_from(bond, slave, i, start_at) {
4290 if (IS_UP(slave->dev) &&
4291 (slave->link == BOND_LINK_UP) &&
4292 (slave->state == BOND_STATE_ACTIVE)) {
4293 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4300 /* no suitable interface, frame not sent */
4303 read_unlock(&bond->lock);
4309 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4310 * the bond has a usable interface.
4312 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4314 struct bonding *bond = bond_dev->priv;
4317 read_lock(&bond->lock);
4318 read_lock(&bond->curr_slave_lock);
4320 if (!BOND_IS_OK(bond)) {
4324 if (!bond->curr_active_slave)
4327 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4331 /* no suitable interface, frame not sent */
4334 read_unlock(&bond->curr_slave_lock);
4335 read_unlock(&bond->lock);
4340 * In bond_xmit_xor() , we determine the output device by using a pre-
4341 * determined xmit_hash_policy(), If the selected device is not enabled,
4342 * find the next active slave.
4344 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4346 struct bonding *bond = bond_dev->priv;
4347 struct slave *slave, *start_at;
4352 read_lock(&bond->lock);
4354 if (!BOND_IS_OK(bond)) {
4358 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
4360 bond_for_each_slave(bond, slave, i) {
4369 bond_for_each_slave_from(bond, slave, i, start_at) {
4370 if (IS_UP(slave->dev) &&
4371 (slave->link == BOND_LINK_UP) &&
4372 (slave->state == BOND_STATE_ACTIVE)) {
4373 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4380 /* no suitable interface, frame not sent */
4383 read_unlock(&bond->lock);
4388 * in broadcast mode, we send everything to all usable interfaces.
4390 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4392 struct bonding *bond = bond_dev->priv;
4393 struct slave *slave, *start_at;
4394 struct net_device *tx_dev = NULL;
4398 read_lock(&bond->lock);
4400 if (!BOND_IS_OK(bond)) {
4404 read_lock(&bond->curr_slave_lock);
4405 start_at = bond->curr_active_slave;
4406 read_unlock(&bond->curr_slave_lock);
4412 bond_for_each_slave_from(bond, slave, i, start_at) {
4413 if (IS_UP(slave->dev) &&
4414 (slave->link == BOND_LINK_UP) &&
4415 (slave->state == BOND_STATE_ACTIVE)) {
4417 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4419 printk(KERN_ERR DRV_NAME
4420 ": %s: Error: bond_xmit_broadcast(): "
4421 "skb_clone() failed\n",
4426 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4428 dev_kfree_skb(skb2);
4432 tx_dev = slave->dev;
4437 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4442 /* no suitable interface, frame not sent */
4445 /* frame sent to all suitable interfaces */
4446 read_unlock(&bond->lock);
4450 /*------------------------- Device initialization ---------------------------*/
4452 static void bond_set_xmit_hash_policy(struct bonding *bond)
4454 switch (bond->params.xmit_policy) {
4455 case BOND_XMIT_POLICY_LAYER23:
4456 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4458 case BOND_XMIT_POLICY_LAYER34:
4459 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4461 case BOND_XMIT_POLICY_LAYER2:
4463 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4469 * set bond mode specific net device operations
4471 void bond_set_mode_ops(struct bonding *bond, int mode)
4473 struct net_device *bond_dev = bond->dev;
4476 case BOND_MODE_ROUNDROBIN:
4477 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4479 case BOND_MODE_ACTIVEBACKUP:
4480 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4483 bond_dev->hard_start_xmit = bond_xmit_xor;
4484 bond_set_xmit_hash_policy(bond);
4486 case BOND_MODE_BROADCAST:
4487 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4489 case BOND_MODE_8023AD:
4490 bond_set_master_3ad_flags(bond);
4491 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
4492 bond_set_xmit_hash_policy(bond);
4495 bond_set_master_alb_flags(bond);
4498 bond_dev->hard_start_xmit = bond_alb_xmit;
4499 bond_dev->set_mac_address = bond_alb_set_mac_address;
4502 /* Should never happen, mode already checked */
4503 printk(KERN_ERR DRV_NAME
4504 ": %s: Error: Unknown bonding mode %d\n",
4511 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4512 struct ethtool_drvinfo *drvinfo)
4514 strncpy(drvinfo->driver, DRV_NAME, 32);
4515 strncpy(drvinfo->version, DRV_VERSION, 32);
4516 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4519 static const struct ethtool_ops bond_ethtool_ops = {
4520 .get_drvinfo = bond_ethtool_get_drvinfo,
4524 * Does not allocate but creates a /proc entry.
4527 static int bond_init(struct net_device *bond_dev, struct bond_params *params)
4529 struct bonding *bond = bond_dev->priv;
4531 dprintk("Begin bond_init for %s\n", bond_dev->name);
4533 /* initialize rwlocks */
4534 rwlock_init(&bond->lock);
4535 rwlock_init(&bond->curr_slave_lock);
4537 bond->params = *params; /* copy params struct */
4539 bond->wq = create_singlethread_workqueue(bond_dev->name);
4543 /* Initialize pointers */
4544 bond->first_slave = NULL;
4545 bond->curr_active_slave = NULL;
4546 bond->current_arp_slave = NULL;
4547 bond->primary_slave = NULL;
4548 bond->dev = bond_dev;
4549 bond->send_grat_arp = 0;
4550 bond->setup_by_slave = 0;
4551 INIT_LIST_HEAD(&bond->vlan_list);
4553 /* Initialize the device entry points */
4554 bond_dev->open = bond_open;
4555 bond_dev->stop = bond_close;
4556 bond_dev->get_stats = bond_get_stats;
4557 bond_dev->do_ioctl = bond_do_ioctl;
4558 bond_dev->ethtool_ops = &bond_ethtool_ops;
4559 bond_dev->set_multicast_list = bond_set_multicast_list;
4560 bond_dev->change_mtu = bond_change_mtu;
4561 bond_dev->set_mac_address = bond_set_mac_address;
4562 bond_dev->validate_addr = NULL;
4564 bond_set_mode_ops(bond, bond->params.mode);
4566 bond_dev->destructor = free_netdev;
4568 /* Initialize the device options */
4569 bond_dev->tx_queue_len = 0;
4570 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4571 bond_dev->priv_flags |= IFF_BONDING;
4573 /* At first, we block adding VLANs. That's the only way to
4574 * prevent problems that occur when adding VLANs over an
4575 * empty bond. The block will be removed once non-challenged
4576 * slaves are enslaved.
4578 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4580 /* don't acquire bond device's netif_tx_lock when
4582 bond_dev->features |= NETIF_F_LLTX;
4584 /* By default, we declare the bond to be fully
4585 * VLAN hardware accelerated capable. Special
4586 * care is taken in the various xmit functions
4587 * when there are slaves that are not hw accel
4590 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4591 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4592 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4593 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4594 NETIF_F_HW_VLAN_RX |
4595 NETIF_F_HW_VLAN_FILTER);
4597 #ifdef CONFIG_PROC_FS
4598 bond_create_proc_entry(bond);
4600 list_add_tail(&bond->bond_list, &bond_dev_list);
4605 /* De-initialize device specific data.
4606 * Caller must hold rtnl_lock.
4608 static void bond_deinit(struct net_device *bond_dev)
4610 struct bonding *bond = bond_dev->priv;
4612 list_del(&bond->bond_list);
4614 #ifdef CONFIG_PROC_FS
4615 bond_remove_proc_entry(bond);
4619 static void bond_work_cancel_all(struct bonding *bond)
4621 write_lock_bh(&bond->lock);
4622 bond->kill_timers = 1;
4623 write_unlock_bh(&bond->lock);
4625 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4626 cancel_delayed_work(&bond->mii_work);
4628 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4629 cancel_delayed_work(&bond->arp_work);
4631 if (bond->params.mode == BOND_MODE_ALB &&
4632 delayed_work_pending(&bond->alb_work))
4633 cancel_delayed_work(&bond->alb_work);
4635 if (bond->params.mode == BOND_MODE_8023AD &&
4636 delayed_work_pending(&bond->ad_work))
4637 cancel_delayed_work(&bond->ad_work);
4640 /* Unregister and free all bond devices.
4641 * Caller must hold rtnl_lock.
4643 static void bond_free_all(void)
4645 struct bonding *bond, *nxt;
4647 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4648 struct net_device *bond_dev = bond->dev;
4650 bond_work_cancel_all(bond);
4651 netif_tx_lock_bh(bond_dev);
4652 bond_mc_list_destroy(bond);
4653 netif_tx_unlock_bh(bond_dev);
4654 /* Release the bonded slaves */
4655 bond_release_all(bond_dev);
4659 #ifdef CONFIG_PROC_FS
4660 bond_destroy_proc_dir();
4664 /*------------------------- Module initialization ---------------------------*/
4667 * Convert string input module parms. Accept either the
4668 * number of the mode or its string name. A bit complicated because
4669 * some mode names are substrings of other names, and calls from sysfs
4670 * may have whitespace in the name (trailing newlines, for example).
4672 int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
4674 int mode = -1, i, rv;
4675 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4677 for (p = (char *)buf; *p; p++)
4678 if (!(isdigit(*p) || isspace(*p)))
4682 rv = sscanf(buf, "%20s", modestr);
4684 rv = sscanf(buf, "%d", &mode);
4689 for (i = 0; tbl[i].modename; i++) {
4690 if (mode == tbl[i].mode)
4692 if (strcmp(modestr, tbl[i].modename) == 0)
4699 static int bond_check_params(struct bond_params *params)
4701 int arp_validate_value, fail_over_mac_value;
4704 * Convert string parameters.
4707 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4708 if (bond_mode == -1) {
4709 printk(KERN_ERR DRV_NAME
4710 ": Error: Invalid bonding mode \"%s\"\n",
4711 mode == NULL ? "NULL" : mode);
4716 if (xmit_hash_policy) {
4717 if ((bond_mode != BOND_MODE_XOR) &&
4718 (bond_mode != BOND_MODE_8023AD)) {
4719 printk(KERN_INFO DRV_NAME
4720 ": xor_mode param is irrelevant in mode %s\n",
4721 bond_mode_name(bond_mode));
4723 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4725 if (xmit_hashtype == -1) {
4726 printk(KERN_ERR DRV_NAME
4727 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4728 xmit_hash_policy == NULL ? "NULL" :
4736 if (bond_mode != BOND_MODE_8023AD) {
4737 printk(KERN_INFO DRV_NAME
4738 ": lacp_rate param is irrelevant in mode %s\n",
4739 bond_mode_name(bond_mode));
4741 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4742 if (lacp_fast == -1) {
4743 printk(KERN_ERR DRV_NAME
4744 ": Error: Invalid lacp rate \"%s\"\n",
4745 lacp_rate == NULL ? "NULL" : lacp_rate);
4751 if (max_bonds < 1 || max_bonds > INT_MAX) {
4752 printk(KERN_WARNING DRV_NAME
4753 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4754 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4755 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4756 max_bonds = BOND_DEFAULT_MAX_BONDS;
4760 printk(KERN_WARNING DRV_NAME
4761 ": Warning: miimon module parameter (%d), "
4762 "not in range 0-%d, so it was reset to %d\n",
4763 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4764 miimon = BOND_LINK_MON_INTERV;
4768 printk(KERN_WARNING DRV_NAME
4769 ": Warning: updelay module parameter (%d), "
4770 "not in range 0-%d, so it was reset to 0\n",
4775 if (downdelay < 0) {
4776 printk(KERN_WARNING DRV_NAME
4777 ": Warning: downdelay module parameter (%d), "
4778 "not in range 0-%d, so it was reset to 0\n",
4779 downdelay, INT_MAX);
4783 if ((use_carrier != 0) && (use_carrier != 1)) {
4784 printk(KERN_WARNING DRV_NAME
4785 ": Warning: use_carrier module parameter (%d), "
4786 "not of valid value (0/1), so it was set to 1\n",
4791 if (num_grat_arp < 0 || num_grat_arp > 255) {
4792 printk(KERN_WARNING DRV_NAME
4793 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4794 "was reset to 1 \n", num_grat_arp);
4798 /* reset values for 802.3ad */
4799 if (bond_mode == BOND_MODE_8023AD) {
4801 printk(KERN_WARNING DRV_NAME
4802 ": Warning: miimon must be specified, "
4803 "otherwise bonding will not detect link "
4804 "failure, speed and duplex which are "
4805 "essential for 802.3ad operation\n");
4806 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4811 /* reset values for TLB/ALB */
4812 if ((bond_mode == BOND_MODE_TLB) ||
4813 (bond_mode == BOND_MODE_ALB)) {
4815 printk(KERN_WARNING DRV_NAME
4816 ": Warning: miimon must be specified, "
4817 "otherwise bonding will not detect link "
4818 "failure and link speed which are essential "
4819 "for TLB/ALB load balancing\n");
4820 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4825 if (bond_mode == BOND_MODE_ALB) {
4826 printk(KERN_NOTICE DRV_NAME
4827 ": In ALB mode you might experience client "
4828 "disconnections upon reconnection of a link if the "
4829 "bonding module updelay parameter (%d msec) is "
4830 "incompatible with the forwarding delay time of the "
4836 if (updelay || downdelay) {
4837 /* just warn the user the up/down delay will have
4838 * no effect since miimon is zero...
4840 printk(KERN_WARNING DRV_NAME
4841 ": Warning: miimon module parameter not set "
4842 "and updelay (%d) or downdelay (%d) module "
4843 "parameter is set; updelay and downdelay have "
4844 "no effect unless miimon is set\n",
4845 updelay, downdelay);
4848 /* don't allow arp monitoring */
4850 printk(KERN_WARNING DRV_NAME
4851 ": Warning: miimon (%d) and arp_interval (%d) "
4852 "can't be used simultaneously, disabling ARP "
4854 miimon, arp_interval);
4858 if ((updelay % miimon) != 0) {
4859 printk(KERN_WARNING DRV_NAME
4860 ": Warning: updelay (%d) is not a multiple "
4861 "of miimon (%d), updelay rounded to %d ms\n",
4862 updelay, miimon, (updelay / miimon) * miimon);
4867 if ((downdelay % miimon) != 0) {
4868 printk(KERN_WARNING DRV_NAME
4869 ": Warning: downdelay (%d) is not a multiple "
4870 "of miimon (%d), downdelay rounded to %d ms\n",
4872 (downdelay / miimon) * miimon);
4875 downdelay /= miimon;
4878 if (arp_interval < 0) {
4879 printk(KERN_WARNING DRV_NAME
4880 ": Warning: arp_interval module parameter (%d) "
4881 ", not in range 0-%d, so it was reset to %d\n",
4882 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4883 arp_interval = BOND_LINK_ARP_INTERV;
4886 for (arp_ip_count = 0;
4887 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4889 /* not complete check, but should be good enough to
4891 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4892 printk(KERN_WARNING DRV_NAME
4893 ": Warning: bad arp_ip_target module parameter "
4894 "(%s), ARP monitoring will not be performed\n",
4895 arp_ip_target[arp_ip_count]);
4898 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
4899 arp_target[arp_ip_count] = ip;
4903 if (arp_interval && !arp_ip_count) {
4904 /* don't allow arping if no arp_ip_target given... */
4905 printk(KERN_WARNING DRV_NAME
4906 ": Warning: arp_interval module parameter (%d) "
4907 "specified without providing an arp_ip_target "
4908 "parameter, arp_interval was reset to 0\n",
4914 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4915 printk(KERN_ERR DRV_NAME
4916 ": arp_validate only supported in active-backup mode\n");
4919 if (!arp_interval) {
4920 printk(KERN_ERR DRV_NAME
4921 ": arp_validate requires arp_interval\n");
4925 arp_validate_value = bond_parse_parm(arp_validate,
4927 if (arp_validate_value == -1) {
4928 printk(KERN_ERR DRV_NAME
4929 ": Error: invalid arp_validate \"%s\"\n",
4930 arp_validate == NULL ? "NULL" : arp_validate);
4934 arp_validate_value = 0;
4937 printk(KERN_INFO DRV_NAME
4938 ": MII link monitoring set to %d ms\n",
4940 } else if (arp_interval) {
4943 printk(KERN_INFO DRV_NAME
4944 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4946 arp_validate_tbl[arp_validate_value].modename,
4949 for (i = 0; i < arp_ip_count; i++)
4950 printk (" %s", arp_ip_target[i]);
4955 /* miimon and arp_interval not set, we need one so things
4956 * work as expected, see bonding.txt for details
4958 printk(KERN_WARNING DRV_NAME
4959 ": Warning: either miimon or arp_interval and "
4960 "arp_ip_target module parameters must be specified, "
4961 "otherwise bonding will not detect link failures! see "
4962 "bonding.txt for details.\n");
4965 if (primary && !USES_PRIMARY(bond_mode)) {
4966 /* currently, using a primary only makes sense
4967 * in active backup, TLB or ALB modes
4969 printk(KERN_WARNING DRV_NAME
4970 ": Warning: %s primary device specified but has no "
4971 "effect in %s mode\n",
4972 primary, bond_mode_name(bond_mode));
4976 if (fail_over_mac) {
4977 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4979 if (fail_over_mac_value == -1) {
4980 printk(KERN_ERR DRV_NAME
4981 ": Error: invalid fail_over_mac \"%s\"\n",
4982 arp_validate == NULL ? "NULL" : arp_validate);
4986 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4987 printk(KERN_WARNING DRV_NAME
4988 ": Warning: fail_over_mac only affects "
4989 "active-backup mode.\n");
4991 fail_over_mac_value = BOND_FOM_NONE;
4994 /* fill params struct with the proper values */
4995 params->mode = bond_mode;
4996 params->xmit_policy = xmit_hashtype;
4997 params->miimon = miimon;
4998 params->num_grat_arp = num_grat_arp;
4999 params->arp_interval = arp_interval;
5000 params->arp_validate = arp_validate_value;
5001 params->updelay = updelay;
5002 params->downdelay = downdelay;
5003 params->use_carrier = use_carrier;
5004 params->lacp_fast = lacp_fast;
5005 params->primary[0] = 0;
5006 params->fail_over_mac = fail_over_mac_value;
5009 strncpy(params->primary, primary, IFNAMSIZ);
5010 params->primary[IFNAMSIZ - 1] = 0;
5013 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5018 static struct lock_class_key bonding_netdev_xmit_lock_key;
5020 /* Create a new bond based on the specified name and bonding parameters.
5021 * If name is NULL, obtain a suitable "bond%d" name for us.
5022 * Caller must NOT hold rtnl_lock; we need to release it here before we
5023 * set up our sysfs entries.
5025 int bond_create(char *name, struct bond_params *params)
5027 struct net_device *bond_dev;
5028 struct bonding *bond;
5032 down_write(&bonding_rwsem);
5034 /* Check to see if the bond already exists. */
5036 list_for_each_entry(bond, &bond_dev_list, bond_list)
5037 if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
5038 printk(KERN_ERR DRV_NAME
5039 ": cannot add bond %s; it already exists\n",
5046 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5049 printk(KERN_ERR DRV_NAME
5050 ": %s: eek! can't alloc netdev!\n",
5057 res = dev_alloc_name(bond_dev, "bond%d");
5062 /* bond_init() must be called after dev_alloc_name() (for the
5063 * /proc files), but before register_netdevice(), because we
5064 * need to set function pointers.
5067 res = bond_init(bond_dev, params);
5072 res = register_netdevice(bond_dev);
5077 lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
5079 netif_carrier_off(bond_dev);
5081 up_write(&bonding_rwsem);
5082 rtnl_unlock(); /* allows sysfs registration of net device */
5083 res = bond_create_sysfs_entry(bond_dev->priv);
5086 down_write(&bonding_rwsem);
5087 bond_deinit(bond_dev);
5088 unregister_netdevice(bond_dev);
5095 bond_deinit(bond_dev);
5097 free_netdev(bond_dev);
5099 up_write(&bonding_rwsem);
5104 static int __init bonding_init(void)
5108 struct bonding *bond;
5110 printk(KERN_INFO "%s", version);
5112 res = bond_check_params(&bonding_defaults);
5117 #ifdef CONFIG_PROC_FS
5118 bond_create_proc_dir();
5121 init_rwsem(&bonding_rwsem);
5123 for (i = 0; i < max_bonds; i++) {
5124 res = bond_create(NULL, &bonding_defaults);
5129 res = bond_create_sysfs();
5133 register_netdevice_notifier(&bond_netdev_notifier);
5134 register_inetaddr_notifier(&bond_inetaddr_notifier);
5138 list_for_each_entry(bond, &bond_dev_list, bond_list) {
5139 bond_work_cancel_all(bond);
5140 destroy_workqueue(bond->wq);
5143 bond_destroy_sysfs();
5153 static void __exit bonding_exit(void)
5155 unregister_netdevice_notifier(&bond_netdev_notifier);
5156 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
5158 bond_destroy_sysfs();
5165 module_init(bonding_init);
5166 module_exit(bonding_exit);
5167 MODULE_LICENSE("GPL");
5168 MODULE_VERSION(DRV_VERSION);
5169 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5170 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5171 MODULE_SUPPORTED_DEVICE("most ethernet devices");