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 #include <linux/kernel.h>
35 #include <linux/module.h>
36 #include <linux/types.h>
37 #include <linux/fcntl.h>
38 #include <linux/interrupt.h>
39 #include <linux/ptrace.h>
40 #include <linux/ioport.h>
44 #include <linux/tcp.h>
45 #include <linux/udp.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/init.h>
49 #include <linux/timer.h>
50 #include <linux/socket.h>
51 #include <linux/ctype.h>
52 #include <linux/inet.h>
53 #include <linux/bitops.h>
55 #include <asm/system.h>
57 #include <linux/uaccess.h>
58 #include <linux/errno.h>
59 #include <linux/netdevice.h>
60 #include <linux/inetdevice.h>
61 #include <linux/igmp.h>
62 #include <linux/etherdevice.h>
63 #include <linux/skbuff.h>
65 #include <linux/rtnetlink.h>
66 #include <linux/proc_fs.h>
67 #include <linux/seq_file.h>
68 #include <linux/smp.h>
69 #include <linux/if_ether.h>
71 #include <linux/mii.h>
72 #include <linux/ethtool.h>
73 #include <linux/if_vlan.h>
74 #include <linux/if_bonding.h>
75 #include <linux/jiffies.h>
76 #include <net/route.h>
77 #include <net/net_namespace.h>
82 /*---------------------------- Module parameters ----------------------------*/
84 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
85 #define BOND_LINK_MON_INTERV 0
86 #define BOND_LINK_ARP_INTERV 0
88 static int max_bonds = BOND_DEFAULT_MAX_BONDS;
89 static int num_grat_arp = 1;
90 static int num_unsol_na = 1;
91 static int miimon = BOND_LINK_MON_INTERV;
94 static int use_carrier = 1;
97 static char *lacp_rate;
98 static char *ad_select;
99 static char *xmit_hash_policy;
100 static int arp_interval = BOND_LINK_ARP_INTERV;
101 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
102 static char *arp_validate;
103 static char *fail_over_mac;
104 static 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(num_unsol_na, int, 0644);
111 MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
112 module_param(miimon, int, 0);
113 MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
114 module_param(updelay, int, 0);
115 MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
116 module_param(downdelay, int, 0);
117 MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
119 module_param(use_carrier, int, 0);
120 MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
121 "0 for off, 1 for on (default)");
122 module_param(mode, charp, 0);
123 MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
124 "1 for active-backup, 2 for balance-xor, "
125 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
126 "6 for balance-alb");
127 module_param(primary, charp, 0);
128 MODULE_PARM_DESC(primary, "Primary network device to use");
129 module_param(lacp_rate, charp, 0);
130 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
132 module_param(ad_select, charp, 0);
133 MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
134 module_param(xmit_hash_policy, charp, 0);
135 MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
136 ", 1 for layer 3+4");
137 module_param(arp_interval, int, 0);
138 MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
139 module_param_array(arp_ip_target, charp, NULL, 0);
140 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
141 module_param(arp_validate, charp, 0);
142 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
143 module_param(fail_over_mac, charp, 0);
144 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
146 /*----------------------------- Global variables ----------------------------*/
148 static const char * const version =
149 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
151 LIST_HEAD(bond_dev_list);
153 #ifdef CONFIG_PROC_FS
154 static struct proc_dir_entry *bond_proc_dir;
157 static __be32 arp_target[BOND_MAX_ARP_TARGETS];
158 static int arp_ip_count;
159 static int bond_mode = BOND_MODE_ROUNDROBIN;
160 static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
161 static int lacp_fast;
164 const struct bond_parm_tbl bond_lacp_tbl[] = {
165 { "slow", AD_LACP_SLOW},
166 { "fast", AD_LACP_FAST},
170 const struct bond_parm_tbl bond_mode_tbl[] = {
171 { "balance-rr", BOND_MODE_ROUNDROBIN},
172 { "active-backup", BOND_MODE_ACTIVEBACKUP},
173 { "balance-xor", BOND_MODE_XOR},
174 { "broadcast", BOND_MODE_BROADCAST},
175 { "802.3ad", BOND_MODE_8023AD},
176 { "balance-tlb", BOND_MODE_TLB},
177 { "balance-alb", BOND_MODE_ALB},
181 const struct bond_parm_tbl xmit_hashtype_tbl[] = {
182 { "layer2", BOND_XMIT_POLICY_LAYER2},
183 { "layer3+4", BOND_XMIT_POLICY_LAYER34},
184 { "layer2+3", BOND_XMIT_POLICY_LAYER23},
188 const struct bond_parm_tbl arp_validate_tbl[] = {
189 { "none", BOND_ARP_VALIDATE_NONE},
190 { "active", BOND_ARP_VALIDATE_ACTIVE},
191 { "backup", BOND_ARP_VALIDATE_BACKUP},
192 { "all", BOND_ARP_VALIDATE_ALL},
196 const struct bond_parm_tbl fail_over_mac_tbl[] = {
197 { "none", BOND_FOM_NONE},
198 { "active", BOND_FOM_ACTIVE},
199 { "follow", BOND_FOM_FOLLOW},
203 struct bond_parm_tbl ad_select_tbl[] = {
204 { "stable", BOND_AD_STABLE},
205 { "bandwidth", BOND_AD_BANDWIDTH},
206 { "count", BOND_AD_COUNT},
210 /*-------------------------- Forward declarations ---------------------------*/
212 static void bond_send_gratuitous_arp(struct bonding *bond);
213 static int bond_init(struct net_device *bond_dev);
214 static void bond_deinit(struct net_device *bond_dev);
216 /*---------------------------- General routines -----------------------------*/
218 static const char *bond_mode_name(int mode)
220 static const char *names[] = {
221 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
222 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
223 [BOND_MODE_XOR] = "load balancing (xor)",
224 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
225 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
226 [BOND_MODE_TLB] = "transmit load balancing",
227 [BOND_MODE_ALB] = "adaptive load balancing",
230 if (mode < 0 || mode > BOND_MODE_ALB)
236 /*---------------------------------- VLAN -----------------------------------*/
239 * bond_add_vlan - add a new vlan id on bond
240 * @bond: bond that got the notification
241 * @vlan_id: the vlan id to add
243 * Returns -ENOMEM if allocation failed.
245 static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
247 struct vlan_entry *vlan;
249 pr_debug("bond: %s, vlan id %d\n",
250 (bond ? bond->dev->name : "None"), vlan_id);
252 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
256 INIT_LIST_HEAD(&vlan->vlan_list);
257 vlan->vlan_id = vlan_id;
259 write_lock_bh(&bond->lock);
261 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
263 write_unlock_bh(&bond->lock);
265 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
271 * bond_del_vlan - delete a vlan id from bond
272 * @bond: bond that got the notification
273 * @vlan_id: the vlan id to delete
275 * returns -ENODEV if @vlan_id was not found in @bond.
277 static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
279 struct vlan_entry *vlan;
282 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
284 write_lock_bh(&bond->lock);
286 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
287 if (vlan->vlan_id == vlan_id) {
288 list_del(&vlan->vlan_list);
290 if (bond_is_lb(bond))
291 bond_alb_clear_vlan(bond, vlan_id);
293 pr_debug("removed VLAN ID %d from bond %s\n", vlan_id,
298 if (list_empty(&bond->vlan_list) &&
299 (bond->slave_cnt == 0)) {
300 /* Last VLAN removed and no slaves, so
301 * restore block on adding VLANs. This will
302 * be removed once new slaves that are not
303 * VLAN challenged will be added.
305 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
313 pr_debug("couldn't find VLAN ID %d in bond %s\n", vlan_id,
317 write_unlock_bh(&bond->lock);
322 * bond_has_challenged_slaves
323 * @bond: the bond we're working on
325 * Searches the slave list. Returns 1 if a vlan challenged slave
326 * was found, 0 otherwise.
328 * Assumes bond->lock is held.
330 static int bond_has_challenged_slaves(struct bonding *bond)
335 bond_for_each_slave(bond, slave, i) {
336 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
337 pr_debug("found VLAN challenged slave - %s\n",
343 pr_debug("no VLAN challenged slaves found\n");
348 * bond_next_vlan - safely skip to the next item in the vlans list.
349 * @bond: the bond we're working on
350 * @curr: item we're advancing from
352 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
353 * or @curr->next otherwise (even if it is @curr itself again).
355 * Caller must hold bond->lock
357 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
359 struct vlan_entry *next, *last;
361 if (list_empty(&bond->vlan_list))
365 next = list_entry(bond->vlan_list.next,
366 struct vlan_entry, vlan_list);
368 last = list_entry(bond->vlan_list.prev,
369 struct vlan_entry, vlan_list);
371 next = list_entry(bond->vlan_list.next,
372 struct vlan_entry, vlan_list);
374 next = list_entry(curr->vlan_list.next,
375 struct vlan_entry, vlan_list);
383 * bond_dev_queue_xmit - Prepare skb for xmit.
385 * @bond: bond device that got this skb for tx.
386 * @skb: hw accel VLAN tagged skb to transmit
387 * @slave_dev: slave that is supposed to xmit this skbuff
389 * When the bond gets an skb to transmit that is
390 * already hardware accelerated VLAN tagged, and it
391 * needs to relay this skb to a slave that is not
392 * hw accel capable, the skb needs to be "unaccelerated",
393 * i.e. strip the hwaccel tag and re-insert it as part
396 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
397 struct net_device *slave_dev)
399 unsigned short uninitialized_var(vlan_id);
401 if (!list_empty(&bond->vlan_list) &&
402 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
403 vlan_get_tag(skb, &vlan_id) == 0) {
404 skb->dev = slave_dev;
405 skb = vlan_put_tag(skb, vlan_id);
407 /* vlan_put_tag() frees the skb in case of error,
408 * so return success here so the calling functions
409 * won't attempt to free is again.
414 skb->dev = slave_dev;
424 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
425 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
427 * a. This operation is performed in IOCTL context,
428 * b. The operation is protected by the RTNL semaphore in the 8021q code,
429 * c. Holding a lock with BH disabled while directly calling a base driver
430 * entry point is generally a BAD idea.
432 * The design of synchronization/protection for this operation in the 8021q
433 * module is good for one or more VLAN devices over a single physical device
434 * and cannot be extended for a teaming solution like bonding, so there is a
435 * potential race condition here where a net device from the vlan group might
436 * be referenced (either by a base driver or the 8021q code) while it is being
437 * removed from the system. However, it turns out we're not making matters
438 * worse, and if it works for regular VLAN usage it will work here too.
442 * bond_vlan_rx_register - Propagates registration to slaves
443 * @bond_dev: bonding net device that got called
444 * @grp: vlan group being registered
446 static void bond_vlan_rx_register(struct net_device *bond_dev,
447 struct vlan_group *grp)
449 struct bonding *bond = netdev_priv(bond_dev);
455 bond_for_each_slave(bond, slave, i) {
456 struct net_device *slave_dev = slave->dev;
457 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
459 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
460 slave_ops->ndo_vlan_rx_register) {
461 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
467 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
468 * @bond_dev: bonding net device that got called
469 * @vid: vlan id being added
471 static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
473 struct bonding *bond = netdev_priv(bond_dev);
477 bond_for_each_slave(bond, slave, i) {
478 struct net_device *slave_dev = slave->dev;
479 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
481 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
482 slave_ops->ndo_vlan_rx_add_vid) {
483 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
487 res = bond_add_vlan(bond, vid);
490 ": %s: Error: Failed to add vlan id %d\n",
491 bond_dev->name, vid);
496 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
497 * @bond_dev: bonding net device that got called
498 * @vid: vlan id being removed
500 static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
502 struct bonding *bond = netdev_priv(bond_dev);
504 struct net_device *vlan_dev;
507 bond_for_each_slave(bond, slave, i) {
508 struct net_device *slave_dev = slave->dev;
509 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
511 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
512 slave_ops->ndo_vlan_rx_kill_vid) {
513 /* Save and then restore vlan_dev in the grp array,
514 * since the slave's driver might clear it.
516 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
517 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
518 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
522 res = bond_del_vlan(bond, vid);
525 ": %s: Error: Failed to remove vlan id %d\n",
526 bond_dev->name, vid);
530 static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
532 struct vlan_entry *vlan;
533 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
535 write_lock_bh(&bond->lock);
537 if (list_empty(&bond->vlan_list))
540 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
541 slave_ops->ndo_vlan_rx_register)
542 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
544 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
545 !(slave_ops->ndo_vlan_rx_add_vid))
548 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
549 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
552 write_unlock_bh(&bond->lock);
555 static void bond_del_vlans_from_slave(struct bonding *bond,
556 struct net_device *slave_dev)
558 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
559 struct vlan_entry *vlan;
560 struct net_device *vlan_dev;
562 write_lock_bh(&bond->lock);
564 if (list_empty(&bond->vlan_list))
567 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
568 !(slave_ops->ndo_vlan_rx_kill_vid))
571 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
572 /* Save and then restore vlan_dev in the grp array,
573 * since the slave's driver might clear it.
575 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
576 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
577 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
581 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
582 slave_ops->ndo_vlan_rx_register)
583 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
586 write_unlock_bh(&bond->lock);
589 /*------------------------------- Link status -------------------------------*/
592 * Set the carrier state for the master according to the state of its
593 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
594 * do special 802.3ad magic.
596 * Returns zero if carrier state does not change, nonzero if it does.
598 static int bond_set_carrier(struct bonding *bond)
603 if (bond->slave_cnt == 0)
606 if (bond->params.mode == BOND_MODE_8023AD)
607 return bond_3ad_set_carrier(bond);
609 bond_for_each_slave(bond, slave, i) {
610 if (slave->link == BOND_LINK_UP) {
611 if (!netif_carrier_ok(bond->dev)) {
612 netif_carrier_on(bond->dev);
620 if (netif_carrier_ok(bond->dev)) {
621 netif_carrier_off(bond->dev);
628 * Get link speed and duplex from the slave's base driver
629 * using ethtool. If for some reason the call fails or the
630 * values are invalid, fake speed and duplex to 100/Full
633 static int bond_update_speed_duplex(struct slave *slave)
635 struct net_device *slave_dev = slave->dev;
636 struct ethtool_cmd etool;
639 /* Fake speed and duplex */
640 slave->speed = SPEED_100;
641 slave->duplex = DUPLEX_FULL;
643 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
646 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
650 switch (etool.speed) {
660 switch (etool.duplex) {
668 slave->speed = etool.speed;
669 slave->duplex = etool.duplex;
675 * if <dev> supports MII link status reporting, check its link status.
677 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
678 * depending upon the setting of the use_carrier parameter.
680 * Return either BMSR_LSTATUS, meaning that the link is up (or we
681 * can't tell and just pretend it is), or 0, meaning that the link is
684 * If reporting is non-zero, instead of faking link up, return -1 if
685 * both ETHTOOL and MII ioctls fail (meaning the device does not
686 * support them). If use_carrier is set, return whatever it says.
687 * It'd be nice if there was a good way to tell if a driver supports
688 * netif_carrier, but there really isn't.
690 static int bond_check_dev_link(struct bonding *bond,
691 struct net_device *slave_dev, int reporting)
693 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
694 static int (*ioctl)(struct net_device *, struct ifreq *, int);
696 struct mii_ioctl_data *mii;
698 if (bond->params.use_carrier)
699 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
701 /* Try to get link status using Ethtool first. */
702 if (slave_dev->ethtool_ops) {
703 if (slave_dev->ethtool_ops->get_link) {
706 link = slave_dev->ethtool_ops->get_link(slave_dev);
708 return link ? BMSR_LSTATUS : 0;
712 /* Ethtool can't be used, fallback to MII ioctls. */
713 ioctl = slave_ops->ndo_do_ioctl;
715 /* TODO: set pointer to correct ioctl on a per team member */
716 /* bases to make this more efficient. that is, once */
717 /* we determine the correct ioctl, we will always */
718 /* call it and not the others for that team */
722 * We cannot assume that SIOCGMIIPHY will also read a
723 * register; not all network drivers (e.g., e100)
727 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
728 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
730 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
731 mii->reg_num = MII_BMSR;
732 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
733 return mii->val_out & BMSR_LSTATUS;
738 * If reporting, report that either there's no dev->do_ioctl,
739 * or both SIOCGMIIREG and get_link failed (meaning that we
740 * cannot report link status). If not reporting, pretend
743 return reporting ? -1 : BMSR_LSTATUS;
746 /*----------------------------- Multicast list ------------------------------*/
749 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
751 static inline int bond_is_dmi_same(const struct dev_mc_list *dmi1,
752 const struct dev_mc_list *dmi2)
754 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
755 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
759 * returns dmi entry if found, NULL otherwise
761 static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi,
762 struct dev_mc_list *mc_list)
764 struct dev_mc_list *idmi;
766 for (idmi = mc_list; idmi; idmi = idmi->next) {
767 if (bond_is_dmi_same(dmi, idmi))
775 * Push the promiscuity flag down to appropriate slaves
777 static int bond_set_promiscuity(struct bonding *bond, int inc)
780 if (USES_PRIMARY(bond->params.mode)) {
781 /* write lock already acquired */
782 if (bond->curr_active_slave) {
783 err = dev_set_promiscuity(bond->curr_active_slave->dev,
789 bond_for_each_slave(bond, slave, i) {
790 err = dev_set_promiscuity(slave->dev, inc);
799 * Push the allmulti flag down to all slaves
801 static int bond_set_allmulti(struct bonding *bond, int inc)
804 if (USES_PRIMARY(bond->params.mode)) {
805 /* write lock already acquired */
806 if (bond->curr_active_slave) {
807 err = dev_set_allmulti(bond->curr_active_slave->dev,
813 bond_for_each_slave(bond, slave, i) {
814 err = dev_set_allmulti(slave->dev, inc);
823 * Add a Multicast address to slaves
826 static void bond_mc_add(struct bonding *bond, void *addr, int alen)
828 if (USES_PRIMARY(bond->params.mode)) {
829 /* write lock already acquired */
830 if (bond->curr_active_slave)
831 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
836 bond_for_each_slave(bond, slave, i)
837 dev_mc_add(slave->dev, addr, alen, 0);
842 * Remove a multicast address from slave
845 static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
847 if (USES_PRIMARY(bond->params.mode)) {
848 /* write lock already acquired */
849 if (bond->curr_active_slave)
850 dev_mc_delete(bond->curr_active_slave->dev, addr,
855 bond_for_each_slave(bond, slave, i) {
856 dev_mc_delete(slave->dev, addr, alen, 0);
863 * Retrieve the list of registered multicast addresses for the bonding
864 * device and retransmit an IGMP JOIN request to the current active
867 static void bond_resend_igmp_join_requests(struct bonding *bond)
869 struct in_device *in_dev;
870 struct ip_mc_list *im;
873 in_dev = __in_dev_get_rcu(bond->dev);
875 for (im = in_dev->mc_list; im; im = im->next)
876 ip_mc_rejoin_group(im);
883 * Totally destroys the mc_list in bond
885 static void bond_mc_list_destroy(struct bonding *bond)
887 struct dev_mc_list *dmi;
891 bond->mc_list = dmi->next;
896 bond->mc_list = NULL;
900 * Copy all the Multicast addresses from src to the bonding device dst
902 static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
905 struct dev_mc_list *dmi, *new_dmi;
907 for (dmi = mc_list; dmi; dmi = dmi->next) {
908 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
911 /* FIXME: Potential memory leak !!! */
915 new_dmi->next = bond->mc_list;
916 bond->mc_list = new_dmi;
917 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
918 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
919 new_dmi->dmi_users = dmi->dmi_users;
920 new_dmi->dmi_gusers = dmi->dmi_gusers;
927 * flush all members of flush->mc_list from device dev->mc_list
929 static void bond_mc_list_flush(struct net_device *bond_dev,
930 struct net_device *slave_dev)
932 struct bonding *bond = netdev_priv(bond_dev);
933 struct dev_mc_list *dmi;
935 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
936 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
938 if (bond->params.mode == BOND_MODE_8023AD) {
939 /* del lacpdu mc addr from mc list */
940 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
942 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
946 /*--------------------------- Active slave change ---------------------------*/
949 * Update the mc list and multicast-related flags for the new and
950 * old active slaves (if any) according to the multicast mode, and
951 * promiscuous flags unconditionally.
953 static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
954 struct slave *old_active)
956 struct dev_mc_list *dmi;
958 if (!USES_PRIMARY(bond->params.mode))
959 /* nothing to do - mc list is already up-to-date on
965 if (bond->dev->flags & IFF_PROMISC)
966 dev_set_promiscuity(old_active->dev, -1);
968 if (bond->dev->flags & IFF_ALLMULTI)
969 dev_set_allmulti(old_active->dev, -1);
971 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
972 dev_mc_delete(old_active->dev, dmi->dmi_addr,
973 dmi->dmi_addrlen, 0);
977 /* FIXME: Signal errors upstream. */
978 if (bond->dev->flags & IFF_PROMISC)
979 dev_set_promiscuity(new_active->dev, 1);
981 if (bond->dev->flags & IFF_ALLMULTI)
982 dev_set_allmulti(new_active->dev, 1);
984 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
985 dev_mc_add(new_active->dev, dmi->dmi_addr,
986 dmi->dmi_addrlen, 0);
987 bond_resend_igmp_join_requests(bond);
992 * bond_do_fail_over_mac
994 * Perform special MAC address swapping for fail_over_mac settings
996 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
998 static void bond_do_fail_over_mac(struct bonding *bond,
999 struct slave *new_active,
1000 struct slave *old_active)
1001 __releases(&bond->curr_slave_lock)
1002 __releases(&bond->lock)
1003 __acquires(&bond->lock)
1004 __acquires(&bond->curr_slave_lock)
1006 u8 tmp_mac[ETH_ALEN];
1007 struct sockaddr saddr;
1010 switch (bond->params.fail_over_mac) {
1011 case BOND_FOM_ACTIVE:
1013 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1014 new_active->dev->addr_len);
1016 case BOND_FOM_FOLLOW:
1018 * if new_active && old_active, swap them
1019 * if just old_active, do nothing (going to no active slave)
1020 * if just new_active, set new_active to bond's MAC
1025 write_unlock_bh(&bond->curr_slave_lock);
1026 read_unlock(&bond->lock);
1029 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1030 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1032 saddr.sa_family = new_active->dev->type;
1034 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1035 saddr.sa_family = bond->dev->type;
1038 rv = dev_set_mac_address(new_active->dev, &saddr);
1041 ": %s: Error %d setting MAC of slave %s\n",
1042 bond->dev->name, -rv, new_active->dev->name);
1049 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1050 saddr.sa_family = old_active->dev->type;
1052 rv = dev_set_mac_address(old_active->dev, &saddr);
1055 ": %s: Error %d setting MAC of slave %s\n",
1056 bond->dev->name, -rv, new_active->dev->name);
1058 read_lock(&bond->lock);
1059 write_lock_bh(&bond->curr_slave_lock);
1063 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1064 bond->dev->name, bond->params.fail_over_mac);
1072 * find_best_interface - select the best available slave to be the active one
1073 * @bond: our bonding struct
1075 * Warning: Caller must hold curr_slave_lock for writing.
1077 static struct slave *bond_find_best_slave(struct bonding *bond)
1079 struct slave *new_active, *old_active;
1080 struct slave *bestslave = NULL;
1081 int mintime = bond->params.updelay;
1084 new_active = old_active = bond->curr_active_slave;
1086 if (!new_active) { /* there were no active slaves left */
1087 if (bond->slave_cnt > 0) /* found one slave */
1088 new_active = bond->first_slave;
1090 return NULL; /* still no slave, return NULL */
1094 * first try the primary link; if arping, a link must tx/rx
1095 * traffic before it can be considered the curr_active_slave.
1096 * also, we would skip slaves between the curr_active_slave
1097 * and primary_slave that may be up and able to arp
1099 if ((bond->primary_slave) &&
1100 (!bond->params.arp_interval) &&
1101 (IS_UP(bond->primary_slave->dev))) {
1102 new_active = bond->primary_slave;
1105 /* remember where to stop iterating over the slaves */
1106 old_active = new_active;
1108 bond_for_each_slave_from(bond, new_active, i, old_active) {
1109 if (IS_UP(new_active->dev)) {
1110 if (new_active->link == BOND_LINK_UP) {
1112 } else if (new_active->link == BOND_LINK_BACK) {
1113 /* link up, but waiting for stabilization */
1114 if (new_active->delay < mintime) {
1115 mintime = new_active->delay;
1116 bestslave = new_active;
1126 * change_active_interface - change the active slave into the specified one
1127 * @bond: our bonding struct
1128 * @new: the new slave to make the active one
1130 * Set the new slave to the bond's settings and unset them on the old
1131 * curr_active_slave.
1132 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1134 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1135 * because it is apparently the best available slave we have, even though its
1136 * updelay hasn't timed out yet.
1138 * If new_active is not NULL, caller must hold bond->lock for read and
1139 * curr_slave_lock for write_bh.
1141 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1143 struct slave *old_active = bond->curr_active_slave;
1145 if (old_active == new_active)
1149 new_active->jiffies = jiffies;
1151 if (new_active->link == BOND_LINK_BACK) {
1152 if (USES_PRIMARY(bond->params.mode)) {
1154 ": %s: making interface %s the new "
1155 "active one %d ms earlier.\n",
1156 bond->dev->name, new_active->dev->name,
1157 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1160 new_active->delay = 0;
1161 new_active->link = BOND_LINK_UP;
1163 if (bond->params.mode == BOND_MODE_8023AD)
1164 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1166 if (bond_is_lb(bond))
1167 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1169 if (USES_PRIMARY(bond->params.mode)) {
1171 ": %s: making interface %s the new "
1173 bond->dev->name, new_active->dev->name);
1178 if (USES_PRIMARY(bond->params.mode))
1179 bond_mc_swap(bond, new_active, old_active);
1181 if (bond_is_lb(bond)) {
1182 bond_alb_handle_active_change(bond, new_active);
1184 bond_set_slave_inactive_flags(old_active);
1186 bond_set_slave_active_flags(new_active);
1188 bond->curr_active_slave = new_active;
1191 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1193 bond_set_slave_inactive_flags(old_active);
1196 bond_set_slave_active_flags(new_active);
1198 if (bond->params.fail_over_mac)
1199 bond_do_fail_over_mac(bond, new_active,
1202 bond->send_grat_arp = bond->params.num_grat_arp;
1203 bond_send_gratuitous_arp(bond);
1205 bond->send_unsol_na = bond->params.num_unsol_na;
1206 bond_send_unsolicited_na(bond);
1208 write_unlock_bh(&bond->curr_slave_lock);
1209 read_unlock(&bond->lock);
1211 netdev_bonding_change(bond->dev);
1213 read_lock(&bond->lock);
1214 write_lock_bh(&bond->curr_slave_lock);
1220 * bond_select_active_slave - select a new active slave, if needed
1221 * @bond: our bonding struct
1223 * This functions should be called when one of the following occurs:
1224 * - The old curr_active_slave has been released or lost its link.
1225 * - The primary_slave has got its link back.
1226 * - A slave has got its link back and there's no old curr_active_slave.
1228 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1230 void bond_select_active_slave(struct bonding *bond)
1232 struct slave *best_slave;
1235 best_slave = bond_find_best_slave(bond);
1236 if (best_slave != bond->curr_active_slave) {
1237 bond_change_active_slave(bond, best_slave);
1238 rv = bond_set_carrier(bond);
1242 if (netif_carrier_ok(bond->dev)) {
1244 ": %s: first active interface up!\n",
1247 pr_info(DRV_NAME ": %s: "
1248 "now running without any active interface !\n",
1254 /*--------------------------- slave list handling ---------------------------*/
1257 * This function attaches the slave to the end of list.
1259 * bond->lock held for writing by caller.
1261 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1263 if (bond->first_slave == NULL) { /* attaching the first slave */
1264 new_slave->next = new_slave;
1265 new_slave->prev = new_slave;
1266 bond->first_slave = new_slave;
1268 new_slave->next = bond->first_slave;
1269 new_slave->prev = bond->first_slave->prev;
1270 new_slave->next->prev = new_slave;
1271 new_slave->prev->next = new_slave;
1278 * This function detaches the slave from the list.
1279 * WARNING: no check is made to verify if the slave effectively
1280 * belongs to <bond>.
1281 * Nothing is freed on return, structures are just unchained.
1282 * If any slave pointer in bond was pointing to <slave>,
1283 * it should be changed by the calling function.
1285 * bond->lock held for writing by caller.
1287 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1290 slave->next->prev = slave->prev;
1293 slave->prev->next = slave->next;
1295 if (bond->first_slave == slave) { /* slave is the first slave */
1296 if (bond->slave_cnt > 1) { /* there are more slave */
1297 bond->first_slave = slave->next;
1299 bond->first_slave = NULL; /* slave was the last one */
1308 /*---------------------------------- IOCTL ----------------------------------*/
1310 static int bond_sethwaddr(struct net_device *bond_dev,
1311 struct net_device *slave_dev)
1313 pr_debug("bond_dev=%p\n", bond_dev);
1314 pr_debug("slave_dev=%p\n", slave_dev);
1315 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1316 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1320 #define BOND_VLAN_FEATURES \
1321 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1322 NETIF_F_HW_VLAN_FILTER)
1325 * Compute the common dev->feature set available to all slaves. Some
1326 * feature bits are managed elsewhere, so preserve those feature bits
1327 * on the master device.
1329 static int bond_compute_features(struct bonding *bond)
1331 struct slave *slave;
1332 struct net_device *bond_dev = bond->dev;
1333 unsigned long features = bond_dev->features;
1334 unsigned long vlan_features = 0;
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_GSO_MASK | NETIF_F_NO_CSUM;
1342 if (!bond->first_slave)
1345 features &= ~NETIF_F_ONE_FOR_ALL;
1347 vlan_features = bond->first_slave->dev->vlan_features;
1348 bond_for_each_slave(bond, slave, i) {
1349 features = netdev_increment_features(features,
1350 slave->dev->features,
1351 NETIF_F_ONE_FOR_ALL);
1352 vlan_features = netdev_increment_features(vlan_features,
1353 slave->dev->vlan_features,
1354 NETIF_F_ONE_FOR_ALL);
1355 if (slave->dev->hard_header_len > max_hard_header_len)
1356 max_hard_header_len = slave->dev->hard_header_len;
1360 features |= (bond_dev->features & BOND_VLAN_FEATURES);
1361 bond_dev->features = netdev_fix_features(features, NULL);
1362 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
1363 bond_dev->hard_header_len = max_hard_header_len;
1368 static void bond_setup_by_slave(struct net_device *bond_dev,
1369 struct net_device *slave_dev)
1371 struct bonding *bond = netdev_priv(bond_dev);
1373 bond_dev->header_ops = slave_dev->header_ops;
1375 bond_dev->type = slave_dev->type;
1376 bond_dev->hard_header_len = slave_dev->hard_header_len;
1377 bond_dev->addr_len = slave_dev->addr_len;
1379 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1380 slave_dev->addr_len);
1381 bond->setup_by_slave = 1;
1384 /* enslave device <slave> to bond device <master> */
1385 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1387 struct bonding *bond = netdev_priv(bond_dev);
1388 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1389 struct slave *new_slave = NULL;
1390 struct dev_mc_list *dmi;
1391 struct sockaddr addr;
1393 int old_features = bond_dev->features;
1396 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1397 slave_ops->ndo_do_ioctl == NULL) {
1399 ": %s: Warning: no link monitoring support for %s\n",
1400 bond_dev->name, slave_dev->name);
1403 /* bond must be initialized by bond_open() before enslaving */
1404 if (!(bond_dev->flags & IFF_UP)) {
1406 " %s: master_dev is not up in bond_enslave\n",
1410 /* already enslaved */
1411 if (slave_dev->flags & IFF_SLAVE) {
1412 pr_debug("Error, Device was already enslaved\n");
1416 /* vlan challenged mutual exclusion */
1417 /* no need to lock since we're protected by rtnl_lock */
1418 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1419 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1420 if (!list_empty(&bond->vlan_list)) {
1422 ": %s: Error: cannot enslave VLAN "
1423 "challenged slave %s on VLAN enabled "
1424 "bond %s\n", bond_dev->name, slave_dev->name,
1429 ": %s: Warning: enslaved VLAN challenged "
1430 "slave %s. Adding VLANs will be blocked as "
1431 "long as %s is part of bond %s\n",
1432 bond_dev->name, slave_dev->name, slave_dev->name,
1434 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1437 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1438 if (bond->slave_cnt == 0) {
1439 /* First slave, and it is not VLAN challenged,
1440 * so remove the block of adding VLANs over the bond.
1442 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1447 * Old ifenslave binaries are no longer supported. These can
1448 * be identified with moderate accuracy by the state of the slave:
1449 * the current ifenslave will set the interface down prior to
1450 * enslaving it; the old ifenslave will not.
1452 if ((slave_dev->flags & IFF_UP)) {
1453 pr_err(DRV_NAME ": %s is up. "
1454 "This may be due to an out of date ifenslave.\n",
1457 goto err_undo_flags;
1460 /* set bonding device ether type by slave - bonding netdevices are
1461 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1462 * there is a need to override some of the type dependent attribs/funcs.
1464 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1465 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1467 if (bond->slave_cnt == 0) {
1468 if (bond_dev->type != slave_dev->type) {
1469 dev_close(bond_dev);
1470 pr_debug("%s: change device type from %d to %d\n",
1471 bond_dev->name, bond_dev->type, slave_dev->type);
1472 if (slave_dev->type != ARPHRD_ETHER)
1473 bond_setup_by_slave(bond_dev, slave_dev);
1475 ether_setup(bond_dev);
1478 } else if (bond_dev->type != slave_dev->type) {
1479 pr_err(DRV_NAME ": %s ether type (%d) is different "
1480 "from other slaves (%d), can not enslave it.\n",
1482 slave_dev->type, bond_dev->type);
1484 goto err_undo_flags;
1487 if (slave_ops->ndo_set_mac_address == NULL) {
1488 if (bond->slave_cnt == 0) {
1490 ": %s: Warning: The first slave device "
1491 "specified does not support setting the MAC "
1492 "address. Setting fail_over_mac to active.",
1494 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1495 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1497 ": %s: Error: The slave device specified "
1498 "does not support setting the MAC address, "
1499 "but fail_over_mac is not set to active.\n"
1502 goto err_undo_flags;
1506 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1509 goto err_undo_flags;
1512 /* save slave's original flags before calling
1513 * netdev_set_master and dev_open
1515 new_slave->original_flags = slave_dev->flags;
1518 * Save slave's original ("permanent") mac address for modes
1519 * that need it, and for restoring it upon release, and then
1520 * set it to the master's address
1522 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1524 if (!bond->params.fail_over_mac) {
1526 * Set slave to master's mac address. The application already
1527 * set the master's mac address to that of the first slave
1529 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1530 addr.sa_family = slave_dev->type;
1531 res = dev_set_mac_address(slave_dev, &addr);
1533 pr_debug("Error %d calling set_mac_address\n", res);
1538 res = netdev_set_master(slave_dev, bond_dev);
1540 pr_debug("Error %d calling netdev_set_master\n", res);
1541 goto err_restore_mac;
1543 /* open the slave since the application closed it */
1544 res = dev_open(slave_dev);
1546 pr_debug("Opening slave %s failed\n", slave_dev->name);
1547 goto err_unset_master;
1550 new_slave->dev = slave_dev;
1551 slave_dev->priv_flags |= IFF_BONDING;
1553 if (bond_is_lb(bond)) {
1554 /* bond_alb_init_slave() must be called before all other stages since
1555 * it might fail and we do not want to have to undo everything
1557 res = bond_alb_init_slave(bond, new_slave);
1562 /* If the mode USES_PRIMARY, then the new slave gets the
1563 * master's promisc (and mc) settings only if it becomes the
1564 * curr_active_slave, and that is taken care of later when calling
1565 * bond_change_active()
1567 if (!USES_PRIMARY(bond->params.mode)) {
1568 /* set promiscuity level to new slave */
1569 if (bond_dev->flags & IFF_PROMISC) {
1570 res = dev_set_promiscuity(slave_dev, 1);
1575 /* set allmulti level to new slave */
1576 if (bond_dev->flags & IFF_ALLMULTI) {
1577 res = dev_set_allmulti(slave_dev, 1);
1582 netif_addr_lock_bh(bond_dev);
1583 /* upload master's mc_list to new slave */
1584 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
1585 dev_mc_add(slave_dev, dmi->dmi_addr,
1586 dmi->dmi_addrlen, 0);
1587 netif_addr_unlock_bh(bond_dev);
1590 if (bond->params.mode == BOND_MODE_8023AD) {
1591 /* add lacpdu mc addr to mc list */
1592 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1594 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1597 bond_add_vlans_on_slave(bond, slave_dev);
1599 write_lock_bh(&bond->lock);
1601 bond_attach_slave(bond, new_slave);
1603 new_slave->delay = 0;
1604 new_slave->link_failure_count = 0;
1606 bond_compute_features(bond);
1608 write_unlock_bh(&bond->lock);
1610 read_lock(&bond->lock);
1612 new_slave->last_arp_rx = jiffies;
1614 if (bond->params.miimon && !bond->params.use_carrier) {
1615 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1617 if ((link_reporting == -1) && !bond->params.arp_interval) {
1619 * miimon is set but a bonded network driver
1620 * does not support ETHTOOL/MII and
1621 * arp_interval is not set. Note: if
1622 * use_carrier is enabled, we will never go
1623 * here (because netif_carrier is always
1624 * supported); thus, we don't need to change
1625 * the messages for netif_carrier.
1628 ": %s: Warning: MII and ETHTOOL support not "
1629 "available for interface %s, and "
1630 "arp_interval/arp_ip_target module parameters "
1631 "not specified, thus bonding will not detect "
1632 "link failures! see bonding.txt for details.\n",
1633 bond_dev->name, slave_dev->name);
1634 } else if (link_reporting == -1) {
1635 /* unable get link status using mii/ethtool */
1637 ": %s: Warning: can't get link status from "
1638 "interface %s; the network driver associated "
1639 "with this interface does not support MII or "
1640 "ETHTOOL link status reporting, thus miimon "
1641 "has no effect on this interface.\n",
1642 bond_dev->name, slave_dev->name);
1646 /* check for initial state */
1647 if (!bond->params.miimon ||
1648 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1649 if (bond->params.updelay) {
1650 pr_debug("Initial state of slave_dev is "
1651 "BOND_LINK_BACK\n");
1652 new_slave->link = BOND_LINK_BACK;
1653 new_slave->delay = bond->params.updelay;
1655 pr_debug("Initial state of slave_dev is "
1657 new_slave->link = BOND_LINK_UP;
1659 new_slave->jiffies = jiffies;
1661 pr_debug("Initial state of slave_dev is "
1662 "BOND_LINK_DOWN\n");
1663 new_slave->link = BOND_LINK_DOWN;
1666 if (bond_update_speed_duplex(new_slave) &&
1667 (new_slave->link != BOND_LINK_DOWN)) {
1669 ": %s: Warning: failed to get speed and duplex from %s, "
1670 "assumed to be 100Mb/sec and Full.\n",
1671 bond_dev->name, new_slave->dev->name);
1673 if (bond->params.mode == BOND_MODE_8023AD) {
1675 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1676 "support in base driver for proper aggregator "
1677 "selection.\n", bond_dev->name);
1681 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1682 /* if there is a primary slave, remember it */
1683 if (strcmp(bond->params.primary, new_slave->dev->name) == 0)
1684 bond->primary_slave = new_slave;
1687 write_lock_bh(&bond->curr_slave_lock);
1689 switch (bond->params.mode) {
1690 case BOND_MODE_ACTIVEBACKUP:
1691 bond_set_slave_inactive_flags(new_slave);
1692 bond_select_active_slave(bond);
1694 case BOND_MODE_8023AD:
1695 /* in 802.3ad mode, the internal mechanism
1696 * will activate the slaves in the selected
1699 bond_set_slave_inactive_flags(new_slave);
1700 /* if this is the first slave */
1701 if (bond->slave_cnt == 1) {
1702 SLAVE_AD_INFO(new_slave).id = 1;
1703 /* Initialize AD with the number of times that the AD timer is called in 1 second
1704 * can be called only after the mac address of the bond is set
1706 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1707 bond->params.lacp_fast);
1709 SLAVE_AD_INFO(new_slave).id =
1710 SLAVE_AD_INFO(new_slave->prev).id + 1;
1713 bond_3ad_bind_slave(new_slave);
1717 new_slave->state = BOND_STATE_ACTIVE;
1718 bond_set_slave_inactive_flags(new_slave);
1719 bond_select_active_slave(bond);
1722 pr_debug("This slave is always active in trunk mode\n");
1724 /* always active in trunk mode */
1725 new_slave->state = BOND_STATE_ACTIVE;
1727 /* In trunking mode there is little meaning to curr_active_slave
1728 * anyway (it holds no special properties of the bond device),
1729 * so we can change it without calling change_active_interface()
1731 if (!bond->curr_active_slave)
1732 bond->curr_active_slave = new_slave;
1735 } /* switch(bond_mode) */
1737 write_unlock_bh(&bond->curr_slave_lock);
1739 bond_set_carrier(bond);
1741 read_unlock(&bond->lock);
1743 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1748 ": %s: enslaving %s as a%s interface with a%s link.\n",
1749 bond_dev->name, slave_dev->name,
1750 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1751 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1753 /* enslave is successful */
1756 /* Undo stages on error */
1758 dev_close(slave_dev);
1761 netdev_set_master(slave_dev, NULL);
1764 if (!bond->params.fail_over_mac) {
1765 /* XXX TODO - fom follow mode needs to change master's
1766 * MAC if this slave's MAC is in use by the bond, or at
1767 * least print a warning.
1769 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1770 addr.sa_family = slave_dev->type;
1771 dev_set_mac_address(slave_dev, &addr);
1778 bond_dev->features = old_features;
1784 * Try to release the slave device <slave> from the bond device <master>
1785 * It is legal to access curr_active_slave without a lock because all the function
1788 * The rules for slave state should be:
1789 * for Active/Backup:
1790 * Active stays on all backups go down
1791 * for Bonded connections:
1792 * The first up interface should be left on and all others downed.
1794 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1796 struct bonding *bond = netdev_priv(bond_dev);
1797 struct slave *slave, *oldcurrent;
1798 struct sockaddr addr;
1799 int mac_addr_differ;
1801 /* slave is not a slave or master is not master of this slave */
1802 if (!(slave_dev->flags & IFF_SLAVE) ||
1803 (slave_dev->master != bond_dev)) {
1805 ": %s: Error: cannot release %s.\n",
1806 bond_dev->name, slave_dev->name);
1810 write_lock_bh(&bond->lock);
1812 slave = bond_get_slave_by_dev(bond, slave_dev);
1814 /* not a slave of this bond */
1816 ": %s: %s not enslaved\n",
1817 bond_dev->name, slave_dev->name);
1818 write_unlock_bh(&bond->lock);
1822 if (!bond->params.fail_over_mac) {
1823 mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr,
1825 if (!mac_addr_differ && (bond->slave_cnt > 1))
1827 ": %s: Warning: the permanent HWaddr of %s - "
1828 "%pM - is still in use by %s. "
1829 "Set the HWaddr of %s to a different address "
1830 "to avoid conflicts.\n",
1831 bond_dev->name, slave_dev->name,
1833 bond_dev->name, slave_dev->name);
1836 /* Inform AD package of unbinding of slave. */
1837 if (bond->params.mode == BOND_MODE_8023AD) {
1838 /* must be called before the slave is
1839 * detached from the list
1841 bond_3ad_unbind_slave(slave);
1845 ": %s: releasing %s interface %s\n",
1847 (slave->state == BOND_STATE_ACTIVE)
1848 ? "active" : "backup",
1851 oldcurrent = bond->curr_active_slave;
1853 bond->current_arp_slave = NULL;
1855 /* release the slave from its bond */
1856 bond_detach_slave(bond, slave);
1858 bond_compute_features(bond);
1860 if (bond->primary_slave == slave)
1861 bond->primary_slave = NULL;
1863 if (oldcurrent == slave)
1864 bond_change_active_slave(bond, NULL);
1866 if (bond_is_lb(bond)) {
1867 /* Must be called only after the slave has been
1868 * detached from the list and the curr_active_slave
1869 * has been cleared (if our_slave == old_current),
1870 * but before a new active slave is selected.
1872 write_unlock_bh(&bond->lock);
1873 bond_alb_deinit_slave(bond, slave);
1874 write_lock_bh(&bond->lock);
1877 if (oldcurrent == slave) {
1879 * Note that we hold RTNL over this sequence, so there
1880 * is no concern that another slave add/remove event
1883 write_unlock_bh(&bond->lock);
1884 read_lock(&bond->lock);
1885 write_lock_bh(&bond->curr_slave_lock);
1887 bond_select_active_slave(bond);
1889 write_unlock_bh(&bond->curr_slave_lock);
1890 read_unlock(&bond->lock);
1891 write_lock_bh(&bond->lock);
1894 if (bond->slave_cnt == 0) {
1895 bond_set_carrier(bond);
1897 /* if the last slave was removed, zero the mac address
1898 * of the master so it will be set by the application
1899 * to the mac address of the first slave
1901 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1903 if (list_empty(&bond->vlan_list)) {
1904 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1907 ": %s: Warning: clearing HW address of %s while it "
1908 "still has VLANs.\n",
1909 bond_dev->name, bond_dev->name);
1911 ": %s: When re-adding slaves, make sure the bond's "
1912 "HW address matches its VLANs'.\n",
1915 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1916 !bond_has_challenged_slaves(bond)) {
1918 ": %s: last VLAN challenged slave %s "
1919 "left bond %s. VLAN blocking is removed\n",
1920 bond_dev->name, slave_dev->name, bond_dev->name);
1921 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1924 write_unlock_bh(&bond->lock);
1926 /* must do this from outside any spinlocks */
1927 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1929 bond_del_vlans_from_slave(bond, slave_dev);
1931 /* If the mode USES_PRIMARY, then we should only remove its
1932 * promisc and mc settings if it was the curr_active_slave, but that was
1933 * already taken care of above when we detached the slave
1935 if (!USES_PRIMARY(bond->params.mode)) {
1936 /* unset promiscuity level from slave */
1937 if (bond_dev->flags & IFF_PROMISC)
1938 dev_set_promiscuity(slave_dev, -1);
1940 /* unset allmulti level from slave */
1941 if (bond_dev->flags & IFF_ALLMULTI)
1942 dev_set_allmulti(slave_dev, -1);
1944 /* flush master's mc_list from slave */
1945 netif_addr_lock_bh(bond_dev);
1946 bond_mc_list_flush(bond_dev, slave_dev);
1947 netif_addr_unlock_bh(bond_dev);
1950 netdev_set_master(slave_dev, NULL);
1952 /* close slave before restoring its mac address */
1953 dev_close(slave_dev);
1955 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1956 /* restore original ("permanent") mac address */
1957 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1958 addr.sa_family = slave_dev->type;
1959 dev_set_mac_address(slave_dev, &addr);
1962 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1963 IFF_SLAVE_INACTIVE | IFF_BONDING |
1968 return 0; /* deletion OK */
1972 * Destroy a bonding device.
1973 * Must be under rtnl_lock when this function is called.
1975 static void bond_uninit(struct net_device *bond_dev)
1977 struct bonding *bond = netdev_priv(bond_dev);
1979 bond_deinit(bond_dev);
1980 bond_destroy_sysfs_entry(bond);
1983 destroy_workqueue(bond->wq);
1985 netif_addr_lock_bh(bond_dev);
1986 bond_mc_list_destroy(bond);
1987 netif_addr_unlock_bh(bond_dev);
1991 * First release a slave and than destroy the bond if no more slaves are left.
1992 * Must be under rtnl_lock when this function is called.
1994 int bond_release_and_destroy(struct net_device *bond_dev,
1995 struct net_device *slave_dev)
1997 struct bonding *bond = netdev_priv(bond_dev);
2000 ret = bond_release(bond_dev, slave_dev);
2001 if ((ret == 0) && (bond->slave_cnt == 0)) {
2002 pr_info(DRV_NAME ": %s: destroying bond %s.\n",
2003 bond_dev->name, bond_dev->name);
2004 unregister_netdevice(bond_dev);
2010 * This function releases all slaves.
2012 static int bond_release_all(struct net_device *bond_dev)
2014 struct bonding *bond = netdev_priv(bond_dev);
2015 struct slave *slave;
2016 struct net_device *slave_dev;
2017 struct sockaddr addr;
2019 write_lock_bh(&bond->lock);
2021 netif_carrier_off(bond_dev);
2023 if (bond->slave_cnt == 0)
2026 bond->current_arp_slave = NULL;
2027 bond->primary_slave = NULL;
2028 bond_change_active_slave(bond, NULL);
2030 while ((slave = bond->first_slave) != NULL) {
2031 /* Inform AD package of unbinding of slave
2032 * before slave is detached from the list.
2034 if (bond->params.mode == BOND_MODE_8023AD)
2035 bond_3ad_unbind_slave(slave);
2037 slave_dev = slave->dev;
2038 bond_detach_slave(bond, slave);
2040 /* now that the slave is detached, unlock and perform
2041 * all the undo steps that should not be called from
2044 write_unlock_bh(&bond->lock);
2046 if (bond_is_lb(bond)) {
2047 /* must be called only after the slave
2048 * has been detached from the list
2050 bond_alb_deinit_slave(bond, slave);
2053 bond_compute_features(bond);
2055 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2056 bond_del_vlans_from_slave(bond, slave_dev);
2058 /* If the mode USES_PRIMARY, then we should only remove its
2059 * promisc and mc settings if it was the curr_active_slave, but that was
2060 * already taken care of above when we detached the slave
2062 if (!USES_PRIMARY(bond->params.mode)) {
2063 /* unset promiscuity level from slave */
2064 if (bond_dev->flags & IFF_PROMISC)
2065 dev_set_promiscuity(slave_dev, -1);
2067 /* unset allmulti level from slave */
2068 if (bond_dev->flags & IFF_ALLMULTI)
2069 dev_set_allmulti(slave_dev, -1);
2071 /* flush master's mc_list from slave */
2072 netif_addr_lock_bh(bond_dev);
2073 bond_mc_list_flush(bond_dev, slave_dev);
2074 netif_addr_unlock_bh(bond_dev);
2077 netdev_set_master(slave_dev, NULL);
2079 /* close slave before restoring its mac address */
2080 dev_close(slave_dev);
2082 if (!bond->params.fail_over_mac) {
2083 /* restore original ("permanent") mac address*/
2084 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2085 addr.sa_family = slave_dev->type;
2086 dev_set_mac_address(slave_dev, &addr);
2089 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2090 IFF_SLAVE_INACTIVE);
2094 /* re-acquire the lock before getting the next slave */
2095 write_lock_bh(&bond->lock);
2098 /* zero the mac address of the master so it will be
2099 * set by the application to the mac address of the
2102 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2104 if (list_empty(&bond->vlan_list))
2105 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2108 ": %s: Warning: clearing HW address of %s while it "
2109 "still has VLANs.\n",
2110 bond_dev->name, bond_dev->name);
2112 ": %s: When re-adding slaves, make sure the bond's "
2113 "HW address matches its VLANs'.\n",
2118 ": %s: released all slaves\n",
2122 write_unlock_bh(&bond->lock);
2128 * This function changes the active slave to slave <slave_dev>.
2129 * It returns -EINVAL in the following cases.
2130 * - <slave_dev> is not found in the list.
2131 * - There is not active slave now.
2132 * - <slave_dev> is already active.
2133 * - The link state of <slave_dev> is not BOND_LINK_UP.
2134 * - <slave_dev> is not running.
2135 * In these cases, this function does nothing.
2136 * In the other cases, current_slave pointer is changed and 0 is returned.
2138 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2140 struct bonding *bond = netdev_priv(bond_dev);
2141 struct slave *old_active = NULL;
2142 struct slave *new_active = NULL;
2145 if (!USES_PRIMARY(bond->params.mode))
2148 /* Verify that master_dev is indeed the master of slave_dev */
2149 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
2152 read_lock(&bond->lock);
2154 read_lock(&bond->curr_slave_lock);
2155 old_active = bond->curr_active_slave;
2156 read_unlock(&bond->curr_slave_lock);
2158 new_active = bond_get_slave_by_dev(bond, slave_dev);
2161 * Changing to the current active: do nothing; return success.
2163 if (new_active && (new_active == old_active)) {
2164 read_unlock(&bond->lock);
2170 (new_active->link == BOND_LINK_UP) &&
2171 IS_UP(new_active->dev)) {
2172 write_lock_bh(&bond->curr_slave_lock);
2173 bond_change_active_slave(bond, new_active);
2174 write_unlock_bh(&bond->curr_slave_lock);
2178 read_unlock(&bond->lock);
2183 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2185 struct bonding *bond = netdev_priv(bond_dev);
2187 info->bond_mode = bond->params.mode;
2188 info->miimon = bond->params.miimon;
2190 read_lock(&bond->lock);
2191 info->num_slaves = bond->slave_cnt;
2192 read_unlock(&bond->lock);
2197 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2199 struct bonding *bond = netdev_priv(bond_dev);
2200 struct slave *slave;
2201 int i, res = -ENODEV;
2203 read_lock(&bond->lock);
2205 bond_for_each_slave(bond, slave, i) {
2206 if (i == (int)info->slave_id) {
2208 strcpy(info->slave_name, slave->dev->name);
2209 info->link = slave->link;
2210 info->state = slave->state;
2211 info->link_failure_count = slave->link_failure_count;
2216 read_unlock(&bond->lock);
2221 /*-------------------------------- Monitoring -------------------------------*/
2224 static int bond_miimon_inspect(struct bonding *bond)
2226 struct slave *slave;
2227 int i, link_state, commit = 0;
2228 bool ignore_updelay;
2230 ignore_updelay = !bond->curr_active_slave ? true : false;
2232 bond_for_each_slave(bond, slave, i) {
2233 slave->new_link = BOND_LINK_NOCHANGE;
2235 link_state = bond_check_dev_link(bond, slave->dev, 0);
2237 switch (slave->link) {
2242 slave->link = BOND_LINK_FAIL;
2243 slave->delay = bond->params.downdelay;
2246 ": %s: link status down for %s"
2247 "interface %s, disabling it in %d ms.\n",
2249 (bond->params.mode ==
2250 BOND_MODE_ACTIVEBACKUP) ?
2251 ((slave->state == BOND_STATE_ACTIVE) ?
2252 "active " : "backup ") : "",
2254 bond->params.downdelay * bond->params.miimon);
2257 case BOND_LINK_FAIL:
2260 * recovered before downdelay expired
2262 slave->link = BOND_LINK_UP;
2263 slave->jiffies = jiffies;
2265 ": %s: link status up again after %d "
2266 "ms for interface %s.\n",
2268 (bond->params.downdelay - slave->delay) *
2269 bond->params.miimon,
2274 if (slave->delay <= 0) {
2275 slave->new_link = BOND_LINK_DOWN;
2283 case BOND_LINK_DOWN:
2287 slave->link = BOND_LINK_BACK;
2288 slave->delay = bond->params.updelay;
2292 ": %s: link status up for "
2293 "interface %s, enabling it in %d ms.\n",
2294 bond->dev->name, slave->dev->name,
2295 ignore_updelay ? 0 :
2296 bond->params.updelay *
2297 bond->params.miimon);
2300 case BOND_LINK_BACK:
2302 slave->link = BOND_LINK_DOWN;
2304 ": %s: link status down again after %d "
2305 "ms for interface %s.\n",
2307 (bond->params.updelay - slave->delay) *
2308 bond->params.miimon,
2317 if (slave->delay <= 0) {
2318 slave->new_link = BOND_LINK_UP;
2320 ignore_updelay = false;
2332 static void bond_miimon_commit(struct bonding *bond)
2334 struct slave *slave;
2337 bond_for_each_slave(bond, slave, i) {
2338 switch (slave->new_link) {
2339 case BOND_LINK_NOCHANGE:
2343 slave->link = BOND_LINK_UP;
2344 slave->jiffies = jiffies;
2346 if (bond->params.mode == BOND_MODE_8023AD) {
2347 /* prevent it from being the active one */
2348 slave->state = BOND_STATE_BACKUP;
2349 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2350 /* make it immediately active */
2351 slave->state = BOND_STATE_ACTIVE;
2352 } else if (slave != bond->primary_slave) {
2353 /* prevent it from being the active one */
2354 slave->state = BOND_STATE_BACKUP;
2358 ": %s: link status definitely "
2359 "up for interface %s.\n",
2360 bond->dev->name, slave->dev->name);
2362 /* notify ad that the link status has changed */
2363 if (bond->params.mode == BOND_MODE_8023AD)
2364 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2366 if (bond_is_lb(bond))
2367 bond_alb_handle_link_change(bond, slave,
2370 if (!bond->curr_active_slave ||
2371 (slave == bond->primary_slave))
2376 case BOND_LINK_DOWN:
2377 if (slave->link_failure_count < UINT_MAX)
2378 slave->link_failure_count++;
2380 slave->link = BOND_LINK_DOWN;
2382 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2383 bond->params.mode == BOND_MODE_8023AD)
2384 bond_set_slave_inactive_flags(slave);
2387 ": %s: link status definitely down for "
2388 "interface %s, disabling it\n",
2389 bond->dev->name, slave->dev->name);
2391 if (bond->params.mode == BOND_MODE_8023AD)
2392 bond_3ad_handle_link_change(slave,
2395 if (bond_is_lb(bond))
2396 bond_alb_handle_link_change(bond, slave,
2399 if (slave == bond->curr_active_slave)
2406 ": %s: invalid new link %d on slave %s\n",
2407 bond->dev->name, slave->new_link,
2409 slave->new_link = BOND_LINK_NOCHANGE;
2416 write_lock_bh(&bond->curr_slave_lock);
2417 bond_select_active_slave(bond);
2418 write_unlock_bh(&bond->curr_slave_lock);
2421 bond_set_carrier(bond);
2427 * Really a wrapper that splits the mii monitor into two phases: an
2428 * inspection, then (if inspection indicates something needs to be done)
2429 * an acquisition of appropriate locks followed by a commit phase to
2430 * implement whatever link state changes are indicated.
2432 void bond_mii_monitor(struct work_struct *work)
2434 struct bonding *bond = container_of(work, struct bonding,
2437 read_lock(&bond->lock);
2438 if (bond->kill_timers)
2441 if (bond->slave_cnt == 0)
2444 if (bond->send_grat_arp) {
2445 read_lock(&bond->curr_slave_lock);
2446 bond_send_gratuitous_arp(bond);
2447 read_unlock(&bond->curr_slave_lock);
2450 if (bond->send_unsol_na) {
2451 read_lock(&bond->curr_slave_lock);
2452 bond_send_unsolicited_na(bond);
2453 read_unlock(&bond->curr_slave_lock);
2456 if (bond_miimon_inspect(bond)) {
2457 read_unlock(&bond->lock);
2459 read_lock(&bond->lock);
2461 bond_miimon_commit(bond);
2463 read_unlock(&bond->lock);
2464 rtnl_unlock(); /* might sleep, hold no other locks */
2465 read_lock(&bond->lock);
2469 if (bond->params.miimon)
2470 queue_delayed_work(bond->wq, &bond->mii_work,
2471 msecs_to_jiffies(bond->params.miimon));
2473 read_unlock(&bond->lock);
2476 static __be32 bond_glean_dev_ip(struct net_device *dev)
2478 struct in_device *idev;
2479 struct in_ifaddr *ifa;
2486 idev = __in_dev_get_rcu(dev);
2490 ifa = idev->ifa_list;
2494 addr = ifa->ifa_local;
2500 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2502 struct vlan_entry *vlan;
2504 if (ip == bond->master_ip)
2507 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2508 if (ip == vlan->vlan_ip)
2516 * We go to the (large) trouble of VLAN tagging ARP frames because
2517 * switches in VLAN mode (especially if ports are configured as
2518 * "native" to a VLAN) might not pass non-tagged frames.
2520 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2522 struct sk_buff *skb;
2524 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2525 slave_dev->name, dest_ip, src_ip, vlan_id);
2527 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2528 NULL, slave_dev->dev_addr, NULL);
2531 pr_err(DRV_NAME ": ARP packet allocation failed\n");
2535 skb = vlan_put_tag(skb, vlan_id);
2537 pr_err(DRV_NAME ": failed to insert VLAN tag\n");
2545 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2548 __be32 *targets = bond->params.arp_targets;
2549 struct vlan_entry *vlan;
2550 struct net_device *vlan_dev;
2554 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2557 pr_debug("basa: target %x\n", targets[i]);
2558 if (list_empty(&bond->vlan_list)) {
2559 pr_debug("basa: empty vlan: arp_send\n");
2560 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2561 bond->master_ip, 0);
2566 * If VLANs are configured, we do a route lookup to
2567 * determine which VLAN interface would be used, so we
2568 * can tag the ARP with the proper VLAN tag.
2570 memset(&fl, 0, sizeof(fl));
2571 fl.fl4_dst = targets[i];
2572 fl.fl4_tos = RTO_ONLINK;
2574 rv = ip_route_output_key(&init_net, &rt, &fl);
2576 if (net_ratelimit()) {
2578 ": %s: no route to arp_ip_target %pI4\n",
2579 bond->dev->name, &fl.fl4_dst);
2585 * This target is not on a VLAN
2587 if (rt->u.dst.dev == bond->dev) {
2589 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2590 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2591 bond->master_ip, 0);
2596 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2597 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2598 if (vlan_dev == rt->u.dst.dev) {
2599 vlan_id = vlan->vlan_id;
2600 pr_debug("basa: vlan match on %s %d\n",
2601 vlan_dev->name, vlan_id);
2608 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2609 vlan->vlan_ip, vlan_id);
2613 if (net_ratelimit()) {
2615 ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2616 bond->dev->name, &fl.fl4_dst,
2617 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2624 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2625 * for each VLAN above us.
2627 * Caller must hold curr_slave_lock for read or better
2629 static void bond_send_gratuitous_arp(struct bonding *bond)
2631 struct slave *slave = bond->curr_active_slave;
2632 struct vlan_entry *vlan;
2633 struct net_device *vlan_dev;
2635 pr_debug("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2636 slave ? slave->dev->name : "NULL");
2638 if (!slave || !bond->send_grat_arp ||
2639 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
2642 bond->send_grat_arp--;
2644 if (bond->master_ip) {
2645 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2646 bond->master_ip, 0);
2649 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2650 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2651 if (vlan->vlan_ip) {
2652 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2653 vlan->vlan_ip, vlan->vlan_id);
2658 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2661 __be32 *targets = bond->params.arp_targets;
2663 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2664 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2665 &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip));
2666 if (sip == targets[i]) {
2667 if (bond_has_this_ip(bond, tip))
2668 slave->last_arp_rx = jiffies;
2674 static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2677 struct slave *slave;
2678 struct bonding *bond;
2679 unsigned char *arp_ptr;
2682 if (dev_net(dev) != &init_net)
2685 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2688 bond = netdev_priv(dev);
2689 read_lock(&bond->lock);
2691 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2692 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2693 orig_dev ? orig_dev->name : "NULL");
2695 slave = bond_get_slave_by_dev(bond, orig_dev);
2696 if (!slave || !slave_do_arp_validate(bond, slave))
2699 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
2703 if (arp->ar_hln != dev->addr_len ||
2704 skb->pkt_type == PACKET_OTHERHOST ||
2705 skb->pkt_type == PACKET_LOOPBACK ||
2706 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2707 arp->ar_pro != htons(ETH_P_IP) ||
2711 arp_ptr = (unsigned char *)(arp + 1);
2712 arp_ptr += dev->addr_len;
2713 memcpy(&sip, arp_ptr, 4);
2714 arp_ptr += 4 + dev->addr_len;
2715 memcpy(&tip, arp_ptr, 4);
2717 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2718 bond->dev->name, slave->dev->name, slave->state,
2719 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2723 * Backup slaves won't see the ARP reply, but do come through
2724 * here for each ARP probe (so we swap the sip/tip to validate
2725 * the probe). In a "redundant switch, common router" type of
2726 * configuration, the ARP probe will (hopefully) travel from
2727 * the active, through one switch, the router, then the other
2728 * switch before reaching the backup.
2730 if (slave->state == BOND_STATE_ACTIVE)
2731 bond_validate_arp(bond, slave, sip, tip);
2733 bond_validate_arp(bond, slave, tip, sip);
2736 read_unlock(&bond->lock);
2739 return NET_RX_SUCCESS;
2743 * this function is called regularly to monitor each slave's link
2744 * ensuring that traffic is being sent and received when arp monitoring
2745 * is used in load-balancing mode. if the adapter has been dormant, then an
2746 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2747 * arp monitoring in active backup mode.
2749 void bond_loadbalance_arp_mon(struct work_struct *work)
2751 struct bonding *bond = container_of(work, struct bonding,
2753 struct slave *slave, *oldcurrent;
2754 int do_failover = 0;
2758 read_lock(&bond->lock);
2760 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2762 if (bond->kill_timers)
2765 if (bond->slave_cnt == 0)
2768 read_lock(&bond->curr_slave_lock);
2769 oldcurrent = bond->curr_active_slave;
2770 read_unlock(&bond->curr_slave_lock);
2772 /* see if any of the previous devices are up now (i.e. they have
2773 * xmt and rcv traffic). the curr_active_slave does not come into
2774 * the picture unless it is null. also, slave->jiffies is not needed
2775 * here because we send an arp on each slave and give a slave as
2776 * long as it needs to get the tx/rx within the delta.
2777 * TODO: what about up/down delay in arp mode? it wasn't here before
2780 bond_for_each_slave(bond, slave, i) {
2781 if (slave->link != BOND_LINK_UP) {
2782 if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) &&
2783 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
2785 slave->link = BOND_LINK_UP;
2786 slave->state = BOND_STATE_ACTIVE;
2788 /* primary_slave has no meaning in round-robin
2789 * mode. the window of a slave being up and
2790 * curr_active_slave being null after enslaving
2795 ": %s: link status definitely "
2796 "up for interface %s, ",
2802 ": %s: interface %s is now up\n",
2808 /* slave->link == BOND_LINK_UP */
2810 /* not all switches will respond to an arp request
2811 * when the source ip is 0, so don't take the link down
2812 * if we don't know our ip yet
2814 if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) ||
2815 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
2817 slave->link = BOND_LINK_DOWN;
2818 slave->state = BOND_STATE_BACKUP;
2820 if (slave->link_failure_count < UINT_MAX)
2821 slave->link_failure_count++;
2824 ": %s: interface %s is now down.\n",
2828 if (slave == oldcurrent)
2833 /* note: if switch is in round-robin mode, all links
2834 * must tx arp to ensure all links rx an arp - otherwise
2835 * links may oscillate or not come up at all; if switch is
2836 * in something like xor mode, there is nothing we can
2837 * do - all replies will be rx'ed on same link causing slaves
2838 * to be unstable during low/no traffic periods
2840 if (IS_UP(slave->dev))
2841 bond_arp_send_all(bond, slave);
2845 write_lock_bh(&bond->curr_slave_lock);
2847 bond_select_active_slave(bond);
2849 write_unlock_bh(&bond->curr_slave_lock);
2853 if (bond->params.arp_interval)
2854 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2856 read_unlock(&bond->lock);
2860 * Called to inspect slaves for active-backup mode ARP monitor link state
2861 * changes. Sets new_link in slaves to specify what action should take
2862 * place for the slave. Returns 0 if no changes are found, >0 if changes
2863 * to link states must be committed.
2865 * Called with bond->lock held for read.
2867 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2869 struct slave *slave;
2872 bond_for_each_slave(bond, slave, i) {
2873 slave->new_link = BOND_LINK_NOCHANGE;
2875 if (slave->link != BOND_LINK_UP) {
2876 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2878 slave->new_link = BOND_LINK_UP;
2886 * Give slaves 2*delta after being enslaved or made
2887 * active. This avoids bouncing, as the last receive
2888 * times need a full ARP monitor cycle to be updated.
2890 if (!time_after_eq(jiffies, slave->jiffies +
2891 2 * delta_in_ticks))
2895 * Backup slave is down if:
2896 * - No current_arp_slave AND
2897 * - more than 3*delta since last receive AND
2898 * - the bond has an IP address
2900 * Note: a non-null current_arp_slave indicates
2901 * the curr_active_slave went down and we are
2902 * searching for a new one; under this condition
2903 * we only take the curr_active_slave down - this
2904 * gives each slave a chance to tx/rx traffic
2905 * before being taken out
2907 if (slave->state == BOND_STATE_BACKUP &&
2908 !bond->current_arp_slave &&
2909 time_after(jiffies, slave_last_rx(bond, slave) +
2910 3 * delta_in_ticks)) {
2911 slave->new_link = BOND_LINK_DOWN;
2916 * Active slave is down if:
2917 * - more than 2*delta since transmitting OR
2918 * - (more than 2*delta since receive AND
2919 * the bond has an IP address)
2921 if ((slave->state == BOND_STATE_ACTIVE) &&
2922 (time_after_eq(jiffies, dev_trans_start(slave->dev) +
2923 2 * delta_in_ticks) ||
2924 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2925 + 2 * delta_in_ticks)))) {
2926 slave->new_link = BOND_LINK_DOWN;
2931 read_lock(&bond->curr_slave_lock);
2934 * Trigger a commit if the primary option setting has changed.
2936 if (bond->primary_slave &&
2937 (bond->primary_slave != bond->curr_active_slave) &&
2938 (bond->primary_slave->link == BOND_LINK_UP))
2941 read_unlock(&bond->curr_slave_lock);
2947 * Called to commit link state changes noted by inspection step of
2948 * active-backup mode ARP monitor.
2950 * Called with RTNL and bond->lock for read.
2952 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2954 struct slave *slave;
2957 bond_for_each_slave(bond, slave, i) {
2958 switch (slave->new_link) {
2959 case BOND_LINK_NOCHANGE:
2963 write_lock_bh(&bond->curr_slave_lock);
2965 if (!bond->curr_active_slave &&
2966 time_before_eq(jiffies, dev_trans_start(slave->dev) +
2968 slave->link = BOND_LINK_UP;
2969 bond_change_active_slave(bond, slave);
2970 bond->current_arp_slave = NULL;
2973 ": %s: %s is up and now the "
2974 "active interface\n",
2975 bond->dev->name, slave->dev->name);
2977 } else if (bond->curr_active_slave != slave) {
2978 /* this slave has just come up but we
2979 * already have a current slave; this can
2980 * also happen if bond_enslave adds a new
2981 * slave that is up while we are searching
2984 slave->link = BOND_LINK_UP;
2985 bond_set_slave_inactive_flags(slave);
2986 bond->current_arp_slave = NULL;
2989 ": %s: backup interface %s is now up\n",
2990 bond->dev->name, slave->dev->name);
2993 write_unlock_bh(&bond->curr_slave_lock);
2997 case BOND_LINK_DOWN:
2998 if (slave->link_failure_count < UINT_MAX)
2999 slave->link_failure_count++;
3001 slave->link = BOND_LINK_DOWN;
3003 if (slave == bond->curr_active_slave) {
3005 ": %s: link status down for active "
3006 "interface %s, disabling it\n",
3007 bond->dev->name, slave->dev->name);
3009 bond_set_slave_inactive_flags(slave);
3011 write_lock_bh(&bond->curr_slave_lock);
3013 bond_select_active_slave(bond);
3014 if (bond->curr_active_slave)
3015 bond->curr_active_slave->jiffies =
3018 write_unlock_bh(&bond->curr_slave_lock);
3020 bond->current_arp_slave = NULL;
3022 } else if (slave->state == BOND_STATE_BACKUP) {
3024 ": %s: backup interface %s is now down\n",
3025 bond->dev->name, slave->dev->name);
3027 bond_set_slave_inactive_flags(slave);
3033 ": %s: impossible: new_link %d on slave %s\n",
3034 bond->dev->name, slave->new_link,
3040 * No race with changes to primary via sysfs, as we hold rtnl.
3042 if (bond->primary_slave &&
3043 (bond->primary_slave != bond->curr_active_slave) &&
3044 (bond->primary_slave->link == BOND_LINK_UP)) {
3045 write_lock_bh(&bond->curr_slave_lock);
3046 bond_change_active_slave(bond, bond->primary_slave);
3047 write_unlock_bh(&bond->curr_slave_lock);
3050 bond_set_carrier(bond);
3054 * Send ARP probes for active-backup mode ARP monitor.
3056 * Called with bond->lock held for read.
3058 static void bond_ab_arp_probe(struct bonding *bond)
3060 struct slave *slave;
3063 read_lock(&bond->curr_slave_lock);
3065 if (bond->current_arp_slave && bond->curr_active_slave)
3066 pr_info(DRV_NAME "PROBE: c_arp %s && cas %s BAD\n",
3067 bond->current_arp_slave->dev->name,
3068 bond->curr_active_slave->dev->name);
3070 if (bond->curr_active_slave) {
3071 bond_arp_send_all(bond, bond->curr_active_slave);
3072 read_unlock(&bond->curr_slave_lock);
3076 read_unlock(&bond->curr_slave_lock);
3078 /* if we don't have a curr_active_slave, search for the next available
3079 * backup slave from the current_arp_slave and make it the candidate
3080 * for becoming the curr_active_slave
3083 if (!bond->current_arp_slave) {
3084 bond->current_arp_slave = bond->first_slave;
3085 if (!bond->current_arp_slave)
3089 bond_set_slave_inactive_flags(bond->current_arp_slave);
3091 /* search for next candidate */
3092 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3093 if (IS_UP(slave->dev)) {
3094 slave->link = BOND_LINK_BACK;
3095 bond_set_slave_active_flags(slave);
3096 bond_arp_send_all(bond, slave);
3097 slave->jiffies = jiffies;
3098 bond->current_arp_slave = slave;
3102 /* if the link state is up at this point, we
3103 * mark it down - this can happen if we have
3104 * simultaneous link failures and
3105 * reselect_active_interface doesn't make this
3106 * one the current slave so it is still marked
3107 * up when it is actually down
3109 if (slave->link == BOND_LINK_UP) {
3110 slave->link = BOND_LINK_DOWN;
3111 if (slave->link_failure_count < UINT_MAX)
3112 slave->link_failure_count++;
3114 bond_set_slave_inactive_flags(slave);
3117 ": %s: backup interface %s is now down.\n",
3118 bond->dev->name, slave->dev->name);
3123 void bond_activebackup_arp_mon(struct work_struct *work)
3125 struct bonding *bond = container_of(work, struct bonding,
3129 read_lock(&bond->lock);
3131 if (bond->kill_timers)
3134 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3136 if (bond->slave_cnt == 0)
3139 if (bond->send_grat_arp) {
3140 read_lock(&bond->curr_slave_lock);
3141 bond_send_gratuitous_arp(bond);
3142 read_unlock(&bond->curr_slave_lock);
3145 if (bond->send_unsol_na) {
3146 read_lock(&bond->curr_slave_lock);
3147 bond_send_unsolicited_na(bond);
3148 read_unlock(&bond->curr_slave_lock);
3151 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3152 read_unlock(&bond->lock);
3154 read_lock(&bond->lock);
3156 bond_ab_arp_commit(bond, delta_in_ticks);
3158 read_unlock(&bond->lock);
3160 read_lock(&bond->lock);
3163 bond_ab_arp_probe(bond);
3166 if (bond->params.arp_interval)
3167 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3169 read_unlock(&bond->lock);
3172 /*------------------------------ proc/seq_file-------------------------------*/
3174 #ifdef CONFIG_PROC_FS
3176 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3177 __acquires(&dev_base_lock)
3178 __acquires(&bond->lock)
3180 struct bonding *bond = seq->private;
3182 struct slave *slave;
3185 /* make sure the bond won't be taken away */
3186 read_lock(&dev_base_lock);
3187 read_lock(&bond->lock);
3190 return SEQ_START_TOKEN;
3192 bond_for_each_slave(bond, slave, i) {
3200 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3202 struct bonding *bond = seq->private;
3203 struct slave *slave = v;
3206 if (v == SEQ_START_TOKEN)
3207 return bond->first_slave;
3209 slave = slave->next;
3211 return (slave == bond->first_slave) ? NULL : slave;
3214 static void bond_info_seq_stop(struct seq_file *seq, void *v)
3215 __releases(&bond->lock)
3216 __releases(&dev_base_lock)
3218 struct bonding *bond = seq->private;
3220 read_unlock(&bond->lock);
3221 read_unlock(&dev_base_lock);
3224 static void bond_info_show_master(struct seq_file *seq)
3226 struct bonding *bond = seq->private;
3230 read_lock(&bond->curr_slave_lock);
3231 curr = bond->curr_active_slave;
3232 read_unlock(&bond->curr_slave_lock);
3234 seq_printf(seq, "Bonding Mode: %s",
3235 bond_mode_name(bond->params.mode));
3237 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3238 bond->params.fail_over_mac)
3239 seq_printf(seq, " (fail_over_mac %s)",
3240 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
3242 seq_printf(seq, "\n");
3244 if (bond->params.mode == BOND_MODE_XOR ||
3245 bond->params.mode == BOND_MODE_8023AD) {
3246 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3247 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3248 bond->params.xmit_policy);
3251 if (USES_PRIMARY(bond->params.mode)) {
3252 seq_printf(seq, "Primary Slave: %s\n",
3253 (bond->primary_slave) ?
3254 bond->primary_slave->dev->name : "None");
3256 seq_printf(seq, "Currently Active Slave: %s\n",
3257 (curr) ? curr->dev->name : "None");
3260 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3262 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3263 seq_printf(seq, "Up Delay (ms): %d\n",
3264 bond->params.updelay * bond->params.miimon);
3265 seq_printf(seq, "Down Delay (ms): %d\n",
3266 bond->params.downdelay * bond->params.miimon);
3269 /* ARP information */
3270 if (bond->params.arp_interval > 0) {
3272 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3273 bond->params.arp_interval);
3275 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3277 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
3278 if (!bond->params.arp_targets[i])
3281 seq_printf(seq, ",");
3282 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
3285 seq_printf(seq, "\n");
3288 if (bond->params.mode == BOND_MODE_8023AD) {
3289 struct ad_info ad_info;
3291 seq_puts(seq, "\n802.3ad info\n");
3292 seq_printf(seq, "LACP rate: %s\n",
3293 (bond->params.lacp_fast) ? "fast" : "slow");
3294 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3295 ad_select_tbl[bond->params.ad_select].modename);
3297 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3298 seq_printf(seq, "bond %s has no active aggregator\n",
3301 seq_printf(seq, "Active Aggregator Info:\n");
3303 seq_printf(seq, "\tAggregator ID: %d\n",
3304 ad_info.aggregator_id);
3305 seq_printf(seq, "\tNumber of ports: %d\n",
3307 seq_printf(seq, "\tActor Key: %d\n",
3309 seq_printf(seq, "\tPartner Key: %d\n",
3310 ad_info.partner_key);
3311 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3312 ad_info.partner_system);
3317 static void bond_info_show_slave(struct seq_file *seq,
3318 const struct slave *slave)
3320 struct bonding *bond = seq->private;
3322 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3323 seq_printf(seq, "MII Status: %s\n",
3324 (slave->link == BOND_LINK_UP) ? "up" : "down");
3325 seq_printf(seq, "Link Failure Count: %u\n",
3326 slave->link_failure_count);
3328 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
3330 if (bond->params.mode == BOND_MODE_8023AD) {
3331 const struct aggregator *agg
3332 = SLAVE_AD_INFO(slave).port.aggregator;
3335 seq_printf(seq, "Aggregator ID: %d\n",
3336 agg->aggregator_identifier);
3338 seq_puts(seq, "Aggregator ID: N/A\n");
3342 static int bond_info_seq_show(struct seq_file *seq, void *v)
3344 if (v == SEQ_START_TOKEN) {
3345 seq_printf(seq, "%s\n", version);
3346 bond_info_show_master(seq);
3348 bond_info_show_slave(seq, v);
3353 static const struct seq_operations bond_info_seq_ops = {
3354 .start = bond_info_seq_start,
3355 .next = bond_info_seq_next,
3356 .stop = bond_info_seq_stop,
3357 .show = bond_info_seq_show,
3360 static int bond_info_open(struct inode *inode, struct file *file)
3362 struct seq_file *seq;
3363 struct proc_dir_entry *proc;
3366 res = seq_open(file, &bond_info_seq_ops);
3368 /* recover the pointer buried in proc_dir_entry data */
3369 seq = file->private_data;
3371 seq->private = proc->data;
3377 static const struct file_operations bond_info_fops = {
3378 .owner = THIS_MODULE,
3379 .open = bond_info_open,
3381 .llseek = seq_lseek,
3382 .release = seq_release,
3385 static int bond_create_proc_entry(struct bonding *bond)
3387 struct net_device *bond_dev = bond->dev;
3389 if (bond_proc_dir) {
3390 bond->proc_entry = proc_create_data(bond_dev->name,
3391 S_IRUGO, bond_proc_dir,
3392 &bond_info_fops, bond);
3393 if (bond->proc_entry == NULL)
3395 ": Warning: Cannot create /proc/net/%s/%s\n",
3396 DRV_NAME, bond_dev->name);
3398 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3404 static void bond_remove_proc_entry(struct bonding *bond)
3406 if (bond_proc_dir && bond->proc_entry) {
3407 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3408 memset(bond->proc_file_name, 0, IFNAMSIZ);
3409 bond->proc_entry = NULL;
3413 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3414 * Caller must hold rtnl_lock.
3416 static void bond_create_proc_dir(void)
3418 if (!bond_proc_dir) {
3419 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
3422 ": Warning: cannot create /proc/net/%s\n",
3427 /* Destroy the bonding directory under /proc/net, if empty.
3428 * Caller must hold rtnl_lock.
3430 static void bond_destroy_proc_dir(void)
3432 if (bond_proc_dir) {
3433 remove_proc_entry(DRV_NAME, init_net.proc_net);
3434 bond_proc_dir = NULL;
3438 #else /* !CONFIG_PROC_FS */
3440 static int bond_create_proc_entry(struct bonding *bond)
3444 static void bond_remove_proc_entry(struct bonding *bond)
3448 static void bond_create_proc_dir(void)
3452 static void bond_destroy_proc_dir(void)
3456 #endif /* CONFIG_PROC_FS */
3459 /*-------------------------- netdev event handling --------------------------*/
3462 * Change device name
3464 static int bond_event_changename(struct bonding *bond)
3466 bond_remove_proc_entry(bond);
3467 bond_create_proc_entry(bond);
3469 bond_destroy_sysfs_entry(bond);
3470 bond_create_sysfs_entry(bond);
3475 static int bond_master_netdev_event(unsigned long event,
3476 struct net_device *bond_dev)
3478 struct bonding *event_bond = netdev_priv(bond_dev);
3481 case NETDEV_CHANGENAME:
3482 return bond_event_changename(event_bond);
3483 case NETDEV_UNREGISTER:
3484 bond_release_all(event_bond->dev);
3493 static int bond_slave_netdev_event(unsigned long event,
3494 struct net_device *slave_dev)
3496 struct net_device *bond_dev = slave_dev->master;
3497 struct bonding *bond = netdev_priv(bond_dev);
3500 case NETDEV_UNREGISTER:
3502 if (bond->setup_by_slave)
3503 bond_release_and_destroy(bond_dev, slave_dev);
3505 bond_release(bond_dev, slave_dev);
3509 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3510 struct slave *slave;
3512 slave = bond_get_slave_by_dev(bond, slave_dev);
3514 u16 old_speed = slave->speed;
3515 u16 old_duplex = slave->duplex;
3517 bond_update_speed_duplex(slave);
3519 if (bond_is_lb(bond))
3522 if (old_speed != slave->speed)
3523 bond_3ad_adapter_speed_changed(slave);
3524 if (old_duplex != slave->duplex)
3525 bond_3ad_adapter_duplex_changed(slave);
3532 * ... Or is it this?
3535 case NETDEV_CHANGEMTU:
3537 * TODO: Should slaves be allowed to
3538 * independently alter their MTU? For
3539 * an active-backup bond, slaves need
3540 * not be the same type of device, so
3541 * MTUs may vary. For other modes,
3542 * slaves arguably should have the
3543 * same MTUs. To do this, we'd need to
3544 * take over the slave's change_mtu
3545 * function for the duration of their
3549 case NETDEV_CHANGENAME:
3551 * TODO: handle changing the primary's name
3554 case NETDEV_FEAT_CHANGE:
3555 bond_compute_features(bond);
3565 * bond_netdev_event: handle netdev notifier chain events.
3567 * This function receives events for the netdev chain. The caller (an
3568 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3569 * locks for us to safely manipulate the slave devices (RTNL lock,
3572 static int bond_netdev_event(struct notifier_block *this,
3573 unsigned long event, void *ptr)
3575 struct net_device *event_dev = (struct net_device *)ptr;
3577 if (dev_net(event_dev) != &init_net)
3580 pr_debug("event_dev: %s, event: %lx\n",
3581 (event_dev ? event_dev->name : "None"),
3584 if (!(event_dev->priv_flags & IFF_BONDING))
3587 if (event_dev->flags & IFF_MASTER) {
3588 pr_debug("IFF_MASTER\n");
3589 return bond_master_netdev_event(event, event_dev);
3592 if (event_dev->flags & IFF_SLAVE) {
3593 pr_debug("IFF_SLAVE\n");
3594 return bond_slave_netdev_event(event, event_dev);
3601 * bond_inetaddr_event: handle inetaddr notifier chain events.
3603 * We keep track of device IPs primarily to use as source addresses in
3604 * ARP monitor probes (rather than spewing out broadcasts all the time).
3606 * We track one IP for the main device (if it has one), plus one per VLAN.
3608 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3610 struct in_ifaddr *ifa = ptr;
3611 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3612 struct bonding *bond;
3613 struct vlan_entry *vlan;
3615 if (dev_net(ifa->ifa_dev->dev) != &init_net)
3618 list_for_each_entry(bond, &bond_dev_list, bond_list) {
3619 if (bond->dev == event_dev) {
3622 bond->master_ip = ifa->ifa_local;
3625 bond->master_ip = bond_glean_dev_ip(bond->dev);
3632 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3633 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
3634 if (vlan_dev == event_dev) {
3637 vlan->vlan_ip = ifa->ifa_local;
3641 bond_glean_dev_ip(vlan_dev);
3652 static struct notifier_block bond_netdev_notifier = {
3653 .notifier_call = bond_netdev_event,
3656 static struct notifier_block bond_inetaddr_notifier = {
3657 .notifier_call = bond_inetaddr_event,
3660 /*-------------------------- Packet type handling ---------------------------*/
3662 /* register to receive lacpdus on a bond */
3663 static void bond_register_lacpdu(struct bonding *bond)
3665 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3667 /* initialize packet type */
3668 pk_type->type = PKT_TYPE_LACPDU;
3669 pk_type->dev = bond->dev;
3670 pk_type->func = bond_3ad_lacpdu_recv;
3672 dev_add_pack(pk_type);
3675 /* unregister to receive lacpdus on a bond */
3676 static void bond_unregister_lacpdu(struct bonding *bond)
3678 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3681 void bond_register_arp(struct bonding *bond)
3683 struct packet_type *pt = &bond->arp_mon_pt;
3688 pt->type = htons(ETH_P_ARP);
3689 pt->dev = bond->dev;
3690 pt->func = bond_arp_rcv;
3694 void bond_unregister_arp(struct bonding *bond)
3696 struct packet_type *pt = &bond->arp_mon_pt;
3698 dev_remove_pack(pt);
3702 /*---------------------------- Hashing Policies -----------------------------*/
3705 * Hash for the output device based upon layer 2 and layer 3 data. If
3706 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3708 static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3709 struct net_device *bond_dev, int count)
3711 struct ethhdr *data = (struct ethhdr *)skb->data;
3712 struct iphdr *iph = ip_hdr(skb);
3714 if (skb->protocol == htons(ETH_P_IP)) {
3715 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3716 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3719 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3723 * Hash for the output device based upon layer 3 and layer 4 data. If
3724 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3725 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3727 static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3728 struct net_device *bond_dev, int count)
3730 struct ethhdr *data = (struct ethhdr *)skb->data;
3731 struct iphdr *iph = ip_hdr(skb);
3732 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3735 if (skb->protocol == htons(ETH_P_IP)) {
3736 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
3737 (iph->protocol == IPPROTO_TCP ||
3738 iph->protocol == IPPROTO_UDP)) {
3739 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3741 return (layer4_xor ^
3742 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3746 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3750 * Hash for the output device based upon layer 2 data
3752 static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3753 struct net_device *bond_dev, int count)
3755 struct ethhdr *data = (struct ethhdr *)skb->data;
3757 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3760 /*-------------------------- Device entry points ----------------------------*/
3762 static int bond_open(struct net_device *bond_dev)
3764 struct bonding *bond = netdev_priv(bond_dev);
3766 bond->kill_timers = 0;
3768 if (bond_is_lb(bond)) {
3769 /* bond_alb_initialize must be called before the timer
3772 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3773 /* something went wrong - fail the open operation */
3777 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3778 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3781 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3782 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3783 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3786 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3787 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3788 INIT_DELAYED_WORK(&bond->arp_work,
3789 bond_activebackup_arp_mon);
3791 INIT_DELAYED_WORK(&bond->arp_work,
3792 bond_loadbalance_arp_mon);
3794 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3795 if (bond->params.arp_validate)
3796 bond_register_arp(bond);
3799 if (bond->params.mode == BOND_MODE_8023AD) {
3800 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3801 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3802 /* register to receive LACPDUs */
3803 bond_register_lacpdu(bond);
3804 bond_3ad_initiate_agg_selection(bond, 1);
3810 static int bond_close(struct net_device *bond_dev)
3812 struct bonding *bond = netdev_priv(bond_dev);
3814 if (bond->params.mode == BOND_MODE_8023AD) {
3815 /* Unregister the receive of LACPDUs */
3816 bond_unregister_lacpdu(bond);
3819 if (bond->params.arp_validate)
3820 bond_unregister_arp(bond);
3822 write_lock_bh(&bond->lock);
3824 bond->send_grat_arp = 0;
3825 bond->send_unsol_na = 0;
3827 /* signal timers not to re-arm */
3828 bond->kill_timers = 1;
3830 write_unlock_bh(&bond->lock);
3832 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3833 cancel_delayed_work(&bond->mii_work);
3836 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3837 cancel_delayed_work(&bond->arp_work);
3840 switch (bond->params.mode) {
3841 case BOND_MODE_8023AD:
3842 cancel_delayed_work(&bond->ad_work);
3846 cancel_delayed_work(&bond->alb_work);
3853 if (bond_is_lb(bond)) {
3854 /* Must be called only after all
3855 * slaves have been released
3857 bond_alb_deinitialize(bond);
3863 static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3865 struct bonding *bond = netdev_priv(bond_dev);
3866 struct net_device_stats *stats = &bond->stats;
3867 struct net_device_stats local_stats;
3868 struct slave *slave;
3871 memset(&local_stats, 0, sizeof(struct net_device_stats));
3873 read_lock_bh(&bond->lock);
3875 bond_for_each_slave(bond, slave, i) {
3876 const struct net_device_stats *sstats = dev_get_stats(slave->dev);
3878 local_stats.rx_packets += sstats->rx_packets;
3879 local_stats.rx_bytes += sstats->rx_bytes;
3880 local_stats.rx_errors += sstats->rx_errors;
3881 local_stats.rx_dropped += sstats->rx_dropped;
3883 local_stats.tx_packets += sstats->tx_packets;
3884 local_stats.tx_bytes += sstats->tx_bytes;
3885 local_stats.tx_errors += sstats->tx_errors;
3886 local_stats.tx_dropped += sstats->tx_dropped;
3888 local_stats.multicast += sstats->multicast;
3889 local_stats.collisions += sstats->collisions;
3891 local_stats.rx_length_errors += sstats->rx_length_errors;
3892 local_stats.rx_over_errors += sstats->rx_over_errors;
3893 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3894 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3895 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3896 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3898 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3899 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3900 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3901 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3902 local_stats.tx_window_errors += sstats->tx_window_errors;
3905 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
3907 read_unlock_bh(&bond->lock);
3912 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3914 struct net_device *slave_dev = NULL;
3915 struct ifbond k_binfo;
3916 struct ifbond __user *u_binfo = NULL;
3917 struct ifslave k_sinfo;
3918 struct ifslave __user *u_sinfo = NULL;
3919 struct mii_ioctl_data *mii = NULL;
3922 pr_debug("bond_ioctl: master=%s, cmd=%d\n",
3923 bond_dev->name, cmd);
3935 * We do this again just in case we were called by SIOCGMIIREG
3936 * instead of SIOCGMIIPHY.
3943 if (mii->reg_num == 1) {
3944 struct bonding *bond = netdev_priv(bond_dev);
3946 read_lock(&bond->lock);
3947 read_lock(&bond->curr_slave_lock);
3948 if (netif_carrier_ok(bond->dev))
3949 mii->val_out = BMSR_LSTATUS;
3951 read_unlock(&bond->curr_slave_lock);
3952 read_unlock(&bond->lock);
3956 case BOND_INFO_QUERY_OLD:
3957 case SIOCBONDINFOQUERY:
3958 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3960 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3963 res = bond_info_query(bond_dev, &k_binfo);
3965 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3969 case BOND_SLAVE_INFO_QUERY_OLD:
3970 case SIOCBONDSLAVEINFOQUERY:
3971 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3973 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3976 res = bond_slave_info_query(bond_dev, &k_sinfo);
3978 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3987 if (!capable(CAP_NET_ADMIN))
3990 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
3992 pr_debug("slave_dev=%p: \n", slave_dev);
3997 pr_debug("slave_dev->name=%s: \n", slave_dev->name);
3999 case BOND_ENSLAVE_OLD:
4000 case SIOCBONDENSLAVE:
4001 res = bond_enslave(bond_dev, slave_dev);
4003 case BOND_RELEASE_OLD:
4004 case SIOCBONDRELEASE:
4005 res = bond_release(bond_dev, slave_dev);
4007 case BOND_SETHWADDR_OLD:
4008 case SIOCBONDSETHWADDR:
4009 res = bond_sethwaddr(bond_dev, slave_dev);
4011 case BOND_CHANGE_ACTIVE_OLD:
4012 case SIOCBONDCHANGEACTIVE:
4013 res = bond_ioctl_change_active(bond_dev, slave_dev);
4025 static void bond_set_multicast_list(struct net_device *bond_dev)
4027 struct bonding *bond = netdev_priv(bond_dev);
4028 struct dev_mc_list *dmi;
4031 * Do promisc before checking multicast_mode
4033 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
4035 * FIXME: Need to handle the error when one of the multi-slaves
4038 bond_set_promiscuity(bond, 1);
4041 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
4042 bond_set_promiscuity(bond, -1);
4045 /* set allmulti flag to slaves */
4046 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
4048 * FIXME: Need to handle the error when one of the multi-slaves
4051 bond_set_allmulti(bond, 1);
4054 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
4055 bond_set_allmulti(bond, -1);
4058 read_lock(&bond->lock);
4060 bond->flags = bond_dev->flags;
4062 /* looking for addresses to add to slaves' mc list */
4063 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4064 if (!bond_mc_list_find_dmi(dmi, bond->mc_list))
4065 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4068 /* looking for addresses to delete from slaves' list */
4069 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4070 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list))
4071 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4074 /* save master's multicast list */
4075 bond_mc_list_destroy(bond);
4076 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4078 read_unlock(&bond->lock);
4081 static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4083 struct bonding *bond = netdev_priv(dev);
4084 struct slave *slave = bond->first_slave;
4087 const struct net_device_ops *slave_ops
4088 = slave->dev->netdev_ops;
4089 if (slave_ops->ndo_neigh_setup)
4090 return slave_ops->ndo_neigh_setup(slave->dev, parms);
4096 * Change the MTU of all of a master's slaves to match the master
4098 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4100 struct bonding *bond = netdev_priv(bond_dev);
4101 struct slave *slave, *stop_at;
4105 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
4106 (bond_dev ? bond_dev->name : "None"), new_mtu);
4108 /* Can't hold bond->lock with bh disabled here since
4109 * some base drivers panic. On the other hand we can't
4110 * hold bond->lock without bh disabled because we'll
4111 * deadlock. The only solution is to rely on the fact
4112 * that we're under rtnl_lock here, and the slaves
4113 * list won't change. This doesn't solve the problem
4114 * of setting the slave's MTU while it is
4115 * transmitting, but the assumption is that the base
4116 * driver can handle that.
4118 * TODO: figure out a way to safely iterate the slaves
4119 * list, but without holding a lock around the actual
4120 * call to the base driver.
4123 bond_for_each_slave(bond, slave, i) {
4124 pr_debug("s %p s->p %p c_m %p\n", slave,
4125 slave->prev, slave->dev->netdev_ops->ndo_change_mtu);
4127 res = dev_set_mtu(slave->dev, new_mtu);
4130 /* If we failed to set the slave's mtu to the new value
4131 * we must abort the operation even in ACTIVE_BACKUP
4132 * mode, because if we allow the backup slaves to have
4133 * different mtu values than the active slave we'll
4134 * need to change their mtu when doing a failover. That
4135 * means changing their mtu from timer context, which
4136 * is probably not a good idea.
4138 pr_debug("err %d %s\n", res, slave->dev->name);
4143 bond_dev->mtu = new_mtu;
4148 /* unwind from head to the slave that failed */
4150 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4153 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4155 pr_debug("unwind err %d dev %s\n", tmp_res,
4166 * Note that many devices must be down to change the HW address, and
4167 * downing the master releases all slaves. We can make bonds full of
4168 * bonding devices to test this, however.
4170 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4172 struct bonding *bond = netdev_priv(bond_dev);
4173 struct sockaddr *sa = addr, tmp_sa;
4174 struct slave *slave, *stop_at;
4178 if (bond->params.mode == BOND_MODE_ALB)
4179 return bond_alb_set_mac_address(bond_dev, addr);
4182 pr_debug("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4185 * If fail_over_mac is set to active, do nothing and return
4186 * success. Returning an error causes ifenslave to fail.
4188 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
4191 if (!is_valid_ether_addr(sa->sa_data))
4192 return -EADDRNOTAVAIL;
4194 /* Can't hold bond->lock with bh disabled here since
4195 * some base drivers panic. On the other hand we can't
4196 * hold bond->lock without bh disabled because we'll
4197 * deadlock. The only solution is to rely on the fact
4198 * that we're under rtnl_lock here, and the slaves
4199 * list won't change. This doesn't solve the problem
4200 * of setting the slave's hw address while it is
4201 * transmitting, but the assumption is that the base
4202 * driver can handle that.
4204 * TODO: figure out a way to safely iterate the slaves
4205 * list, but without holding a lock around the actual
4206 * call to the base driver.
4209 bond_for_each_slave(bond, slave, i) {
4210 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
4211 pr_debug("slave %p %s\n", slave, slave->dev->name);
4213 if (slave_ops->ndo_set_mac_address == NULL) {
4215 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
4219 res = dev_set_mac_address(slave->dev, addr);
4221 /* TODO: consider downing the slave
4223 * User should expect communications
4224 * breakage anyway until ARP finish
4227 pr_debug("err %d %s\n", res, slave->dev->name);
4233 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4237 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4238 tmp_sa.sa_family = bond_dev->type;
4240 /* unwind from head to the slave that failed */
4242 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4245 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4247 pr_debug("unwind err %d dev %s\n", tmp_res,
4255 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4257 struct bonding *bond = netdev_priv(bond_dev);
4258 struct slave *slave, *start_at;
4259 int i, slave_no, res = 1;
4261 read_lock(&bond->lock);
4263 if (!BOND_IS_OK(bond))
4267 * Concurrent TX may collide on rr_tx_counter; we accept that
4268 * as being rare enough not to justify using an atomic op here
4270 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4272 bond_for_each_slave(bond, slave, i) {
4279 bond_for_each_slave_from(bond, slave, i, start_at) {
4280 if (IS_UP(slave->dev) &&
4281 (slave->link == BOND_LINK_UP) &&
4282 (slave->state == BOND_STATE_ACTIVE)) {
4283 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4290 /* no suitable interface, frame not sent */
4293 read_unlock(&bond->lock);
4294 return NETDEV_TX_OK;
4299 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4300 * the bond has a usable interface.
4302 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4304 struct bonding *bond = netdev_priv(bond_dev);
4307 read_lock(&bond->lock);
4308 read_lock(&bond->curr_slave_lock);
4310 if (!BOND_IS_OK(bond))
4313 if (!bond->curr_active_slave)
4316 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4320 /* no suitable interface, frame not sent */
4323 read_unlock(&bond->curr_slave_lock);
4324 read_unlock(&bond->lock);
4325 return NETDEV_TX_OK;
4329 * In bond_xmit_xor() , we determine the output device by using a pre-
4330 * determined xmit_hash_policy(), If the selected device is not enabled,
4331 * find the next active slave.
4333 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4335 struct bonding *bond = netdev_priv(bond_dev);
4336 struct slave *slave, *start_at;
4341 read_lock(&bond->lock);
4343 if (!BOND_IS_OK(bond))
4346 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
4348 bond_for_each_slave(bond, slave, i) {
4356 bond_for_each_slave_from(bond, slave, i, start_at) {
4357 if (IS_UP(slave->dev) &&
4358 (slave->link == BOND_LINK_UP) &&
4359 (slave->state == BOND_STATE_ACTIVE)) {
4360 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4367 /* no suitable interface, frame not sent */
4370 read_unlock(&bond->lock);
4371 return NETDEV_TX_OK;
4375 * in broadcast mode, we send everything to all usable interfaces.
4377 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4379 struct bonding *bond = netdev_priv(bond_dev);
4380 struct slave *slave, *start_at;
4381 struct net_device *tx_dev = NULL;
4385 read_lock(&bond->lock);
4387 if (!BOND_IS_OK(bond))
4390 read_lock(&bond->curr_slave_lock);
4391 start_at = bond->curr_active_slave;
4392 read_unlock(&bond->curr_slave_lock);
4397 bond_for_each_slave_from(bond, slave, i, start_at) {
4398 if (IS_UP(slave->dev) &&
4399 (slave->link == BOND_LINK_UP) &&
4400 (slave->state == BOND_STATE_ACTIVE)) {
4402 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4405 ": %s: Error: bond_xmit_broadcast(): "
4406 "skb_clone() failed\n",
4411 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4413 dev_kfree_skb(skb2);
4417 tx_dev = slave->dev;
4422 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4426 /* no suitable interface, frame not sent */
4429 /* frame sent to all suitable interfaces */
4430 read_unlock(&bond->lock);
4431 return NETDEV_TX_OK;
4434 /*------------------------- Device initialization ---------------------------*/
4436 static void bond_set_xmit_hash_policy(struct bonding *bond)
4438 switch (bond->params.xmit_policy) {
4439 case BOND_XMIT_POLICY_LAYER23:
4440 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4442 case BOND_XMIT_POLICY_LAYER34:
4443 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4445 case BOND_XMIT_POLICY_LAYER2:
4447 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4452 static int bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4454 const struct bonding *bond = netdev_priv(dev);
4456 switch (bond->params.mode) {
4457 case BOND_MODE_ROUNDROBIN:
4458 return bond_xmit_roundrobin(skb, dev);
4459 case BOND_MODE_ACTIVEBACKUP:
4460 return bond_xmit_activebackup(skb, dev);
4462 return bond_xmit_xor(skb, dev);
4463 case BOND_MODE_BROADCAST:
4464 return bond_xmit_broadcast(skb, dev);
4465 case BOND_MODE_8023AD:
4466 return bond_3ad_xmit_xor(skb, dev);
4469 return bond_alb_xmit(skb, dev);
4471 /* Should never happen, mode already checked */
4472 pr_err(DRV_NAME ": %s: Error: Unknown bonding mode %d\n",
4473 dev->name, bond->params.mode);
4476 return NETDEV_TX_OK;
4482 * set bond mode specific net device operations
4484 void bond_set_mode_ops(struct bonding *bond, int mode)
4486 struct net_device *bond_dev = bond->dev;
4489 case BOND_MODE_ROUNDROBIN:
4491 case BOND_MODE_ACTIVEBACKUP:
4494 bond_set_xmit_hash_policy(bond);
4496 case BOND_MODE_BROADCAST:
4498 case BOND_MODE_8023AD:
4499 bond_set_master_3ad_flags(bond);
4500 bond_set_xmit_hash_policy(bond);
4503 bond_set_master_alb_flags(bond);
4508 /* Should never happen, mode already checked */
4510 ": %s: Error: Unknown bonding mode %d\n",
4517 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4518 struct ethtool_drvinfo *drvinfo)
4520 strncpy(drvinfo->driver, DRV_NAME, 32);
4521 strncpy(drvinfo->version, DRV_VERSION, 32);
4522 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4525 static const struct ethtool_ops bond_ethtool_ops = {
4526 .get_drvinfo = bond_ethtool_get_drvinfo,
4527 .get_link = ethtool_op_get_link,
4528 .get_tx_csum = ethtool_op_get_tx_csum,
4529 .get_sg = ethtool_op_get_sg,
4530 .get_tso = ethtool_op_get_tso,
4531 .get_ufo = ethtool_op_get_ufo,
4532 .get_flags = ethtool_op_get_flags,
4535 static const struct net_device_ops bond_netdev_ops = {
4536 .ndo_init = bond_init,
4537 .ndo_uninit = bond_uninit,
4538 .ndo_open = bond_open,
4539 .ndo_stop = bond_close,
4540 .ndo_start_xmit = bond_start_xmit,
4541 .ndo_get_stats = bond_get_stats,
4542 .ndo_do_ioctl = bond_do_ioctl,
4543 .ndo_set_multicast_list = bond_set_multicast_list,
4544 .ndo_change_mtu = bond_change_mtu,
4545 .ndo_set_mac_address = bond_set_mac_address,
4546 .ndo_neigh_setup = bond_neigh_setup,
4547 .ndo_vlan_rx_register = bond_vlan_rx_register,
4548 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4549 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4552 static void bond_setup(struct net_device *bond_dev)
4554 struct bonding *bond = netdev_priv(bond_dev);
4556 /* initialize rwlocks */
4557 rwlock_init(&bond->lock);
4558 rwlock_init(&bond->curr_slave_lock);
4560 bond->params = bonding_defaults;
4562 /* Initialize pointers */
4563 bond->dev = bond_dev;
4564 INIT_LIST_HEAD(&bond->vlan_list);
4566 /* Initialize the device entry points */
4567 ether_setup(bond_dev);
4568 bond_dev->netdev_ops = &bond_netdev_ops;
4569 bond_dev->ethtool_ops = &bond_ethtool_ops;
4570 bond_set_mode_ops(bond, bond->params.mode);
4572 bond_dev->destructor = free_netdev;
4574 /* Initialize the device options */
4575 bond_dev->tx_queue_len = 0;
4576 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4577 bond_dev->priv_flags |= IFF_BONDING;
4578 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4580 if (bond->params.arp_interval)
4581 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
4583 /* At first, we block adding VLANs. That's the only way to
4584 * prevent problems that occur when adding VLANs over an
4585 * empty bond. The block will be removed once non-challenged
4586 * slaves are enslaved.
4588 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4590 /* don't acquire bond device's netif_tx_lock when
4592 bond_dev->features |= NETIF_F_LLTX;
4594 /* By default, we declare the bond to be fully
4595 * VLAN hardware accelerated capable. Special
4596 * care is taken in the various xmit functions
4597 * when there are slaves that are not hw accel
4600 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4601 NETIF_F_HW_VLAN_RX |
4602 NETIF_F_HW_VLAN_FILTER);
4606 static void bond_work_cancel_all(struct bonding *bond)
4608 write_lock_bh(&bond->lock);
4609 bond->kill_timers = 1;
4610 write_unlock_bh(&bond->lock);
4612 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4613 cancel_delayed_work(&bond->mii_work);
4615 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4616 cancel_delayed_work(&bond->arp_work);
4618 if (bond->params.mode == BOND_MODE_ALB &&
4619 delayed_work_pending(&bond->alb_work))
4620 cancel_delayed_work(&bond->alb_work);
4622 if (bond->params.mode == BOND_MODE_8023AD &&
4623 delayed_work_pending(&bond->ad_work))
4624 cancel_delayed_work(&bond->ad_work);
4627 /* De-initialize device specific data.
4628 * Caller must hold rtnl_lock.
4630 static void bond_deinit(struct net_device *bond_dev)
4632 struct bonding *bond = netdev_priv(bond_dev);
4634 list_del(&bond->bond_list);
4636 bond_work_cancel_all(bond);
4638 bond_remove_proc_entry(bond);
4641 /* Unregister and free all bond devices.
4642 * Caller must hold rtnl_lock.
4644 static void bond_free_all(void)
4646 struct bonding *bond, *nxt;
4648 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4649 struct net_device *bond_dev = bond->dev;
4651 bond_work_cancel_all(bond);
4652 /* Release the bonded slaves */
4653 bond_release_all(bond_dev);
4654 unregister_netdevice(bond_dev);
4657 bond_destroy_proc_dir();
4660 /*------------------------- Module initialization ---------------------------*/
4663 * Convert string input module parms. Accept either the
4664 * number of the mode or its string name. A bit complicated because
4665 * some mode names are substrings of other names, and calls from sysfs
4666 * may have whitespace in the name (trailing newlines, for example).
4668 int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4670 int modeint = -1, i, rv;
4671 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4673 for (p = (char *)buf; *p; p++)
4674 if (!(isdigit(*p) || isspace(*p)))
4678 rv = sscanf(buf, "%20s", modestr);
4680 rv = sscanf(buf, "%d", &modeint);
4685 for (i = 0; tbl[i].modename; i++) {
4686 if (modeint == tbl[i].mode)
4688 if (strcmp(modestr, tbl[i].modename) == 0)
4695 static int bond_check_params(struct bond_params *params)
4697 int arp_validate_value, fail_over_mac_value;
4700 * Convert string parameters.
4703 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4704 if (bond_mode == -1) {
4706 ": Error: Invalid bonding mode \"%s\"\n",
4707 mode == NULL ? "NULL" : mode);
4712 if (xmit_hash_policy) {
4713 if ((bond_mode != BOND_MODE_XOR) &&
4714 (bond_mode != BOND_MODE_8023AD)) {
4716 ": xor_mode param is irrelevant in mode %s\n",
4717 bond_mode_name(bond_mode));
4719 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4721 if (xmit_hashtype == -1) {
4723 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4724 xmit_hash_policy == NULL ? "NULL" :
4732 if (bond_mode != BOND_MODE_8023AD) {
4734 ": lacp_rate param is irrelevant in mode %s\n",
4735 bond_mode_name(bond_mode));
4737 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4738 if (lacp_fast == -1) {
4740 ": Error: Invalid lacp rate \"%s\"\n",
4741 lacp_rate == NULL ? "NULL" : lacp_rate);
4748 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4749 if (params->ad_select == -1) {
4751 ": Error: Invalid ad_select \"%s\"\n",
4752 ad_select == NULL ? "NULL" : ad_select);
4756 if (bond_mode != BOND_MODE_8023AD) {
4758 ": ad_select param only affects 802.3ad mode\n");
4761 params->ad_select = BOND_AD_STABLE;
4764 if (max_bonds < 0 || max_bonds > INT_MAX) {
4766 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4767 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4768 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4769 max_bonds = BOND_DEFAULT_MAX_BONDS;
4774 ": Warning: miimon module parameter (%d), "
4775 "not in range 0-%d, so it was reset to %d\n",
4776 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4777 miimon = BOND_LINK_MON_INTERV;
4782 ": Warning: updelay module parameter (%d), "
4783 "not in range 0-%d, so it was reset to 0\n",
4788 if (downdelay < 0) {
4790 ": Warning: downdelay module parameter (%d), "
4791 "not in range 0-%d, so it was reset to 0\n",
4792 downdelay, INT_MAX);
4796 if ((use_carrier != 0) && (use_carrier != 1)) {
4798 ": Warning: use_carrier module parameter (%d), "
4799 "not of valid value (0/1), so it was set to 1\n",
4804 if (num_grat_arp < 0 || num_grat_arp > 255) {
4806 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4807 "was reset to 1 \n", num_grat_arp);
4811 if (num_unsol_na < 0 || num_unsol_na > 255) {
4813 ": Warning: num_unsol_na (%d) not in range 0-255 so it "
4814 "was reset to 1 \n", num_unsol_na);
4818 /* reset values for 802.3ad */
4819 if (bond_mode == BOND_MODE_8023AD) {
4822 ": Warning: miimon must be specified, "
4823 "otherwise bonding will not detect link "
4824 "failure, speed and duplex which are "
4825 "essential for 802.3ad operation\n");
4826 pr_warning("Forcing miimon to 100msec\n");
4831 /* reset values for TLB/ALB */
4832 if ((bond_mode == BOND_MODE_TLB) ||
4833 (bond_mode == BOND_MODE_ALB)) {
4836 ": Warning: miimon must be specified, "
4837 "otherwise bonding will not detect link "
4838 "failure and link speed which are essential "
4839 "for TLB/ALB load balancing\n");
4840 pr_warning("Forcing miimon to 100msec\n");
4845 if (bond_mode == BOND_MODE_ALB) {
4847 ": In ALB mode you might experience client "
4848 "disconnections upon reconnection of a link if the "
4849 "bonding module updelay parameter (%d msec) is "
4850 "incompatible with the forwarding delay time of the "
4856 if (updelay || downdelay) {
4857 /* just warn the user the up/down delay will have
4858 * no effect since miimon is zero...
4861 ": Warning: miimon module parameter not set "
4862 "and updelay (%d) or downdelay (%d) module "
4863 "parameter is set; updelay and downdelay have "
4864 "no effect unless miimon is set\n",
4865 updelay, downdelay);
4868 /* don't allow arp monitoring */
4871 ": Warning: miimon (%d) and arp_interval (%d) "
4872 "can't be used simultaneously, disabling ARP "
4874 miimon, arp_interval);
4878 if ((updelay % miimon) != 0) {
4880 ": Warning: updelay (%d) is not a multiple "
4881 "of miimon (%d), updelay rounded to %d ms\n",
4882 updelay, miimon, (updelay / miimon) * miimon);
4887 if ((downdelay % miimon) != 0) {
4889 ": Warning: downdelay (%d) is not a multiple "
4890 "of miimon (%d), downdelay rounded to %d ms\n",
4892 (downdelay / miimon) * miimon);
4895 downdelay /= miimon;
4898 if (arp_interval < 0) {
4900 ": Warning: arp_interval module parameter (%d) "
4901 ", not in range 0-%d, so it was reset to %d\n",
4902 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4903 arp_interval = BOND_LINK_ARP_INTERV;
4906 for (arp_ip_count = 0;
4907 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4909 /* not complete check, but should be good enough to
4911 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4913 ": Warning: bad arp_ip_target module parameter "
4914 "(%s), ARP monitoring will not be performed\n",
4915 arp_ip_target[arp_ip_count]);
4918 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
4919 arp_target[arp_ip_count] = ip;
4923 if (arp_interval && !arp_ip_count) {
4924 /* don't allow arping if no arp_ip_target given... */
4926 ": Warning: arp_interval module parameter (%d) "
4927 "specified without providing an arp_ip_target "
4928 "parameter, arp_interval was reset to 0\n",
4934 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4936 ": arp_validate only supported in active-backup mode\n");
4939 if (!arp_interval) {
4941 ": arp_validate requires arp_interval\n");
4945 arp_validate_value = bond_parse_parm(arp_validate,
4947 if (arp_validate_value == -1) {
4949 ": Error: invalid arp_validate \"%s\"\n",
4950 arp_validate == NULL ? "NULL" : arp_validate);
4954 arp_validate_value = 0;
4958 ": MII link monitoring set to %d ms\n",
4960 } else if (arp_interval) {
4963 pr_info(DRV_NAME ": ARP monitoring set to %d ms,"
4964 " validate %s, with %d target(s):",
4966 arp_validate_tbl[arp_validate_value].modename,
4969 for (i = 0; i < arp_ip_count; i++)
4970 pr_info(" %s", arp_ip_target[i]);
4974 } else if (max_bonds) {
4975 /* miimon and arp_interval not set, we need one so things
4976 * work as expected, see bonding.txt for details
4979 ": Warning: either miimon or arp_interval and "
4980 "arp_ip_target module parameters must be specified, "
4981 "otherwise bonding will not detect link failures! see "
4982 "bonding.txt for details.\n");
4985 if (primary && !USES_PRIMARY(bond_mode)) {
4986 /* currently, using a primary only makes sense
4987 * in active backup, TLB or ALB modes
4990 ": Warning: %s primary device specified but has no "
4991 "effect in %s mode\n",
4992 primary, bond_mode_name(bond_mode));
4996 if (fail_over_mac) {
4997 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4999 if (fail_over_mac_value == -1) {
5001 ": Error: invalid fail_over_mac \"%s\"\n",
5002 arp_validate == NULL ? "NULL" : arp_validate);
5006 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
5008 ": Warning: fail_over_mac only affects "
5009 "active-backup mode.\n");
5011 fail_over_mac_value = BOND_FOM_NONE;
5014 /* fill params struct with the proper values */
5015 params->mode = bond_mode;
5016 params->xmit_policy = xmit_hashtype;
5017 params->miimon = miimon;
5018 params->num_grat_arp = num_grat_arp;
5019 params->num_unsol_na = num_unsol_na;
5020 params->arp_interval = arp_interval;
5021 params->arp_validate = arp_validate_value;
5022 params->updelay = updelay;
5023 params->downdelay = downdelay;
5024 params->use_carrier = use_carrier;
5025 params->lacp_fast = lacp_fast;
5026 params->primary[0] = 0;
5027 params->fail_over_mac = fail_over_mac_value;
5030 strncpy(params->primary, primary, IFNAMSIZ);
5031 params->primary[IFNAMSIZ - 1] = 0;
5034 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5039 static struct lock_class_key bonding_netdev_xmit_lock_key;
5040 static struct lock_class_key bonding_netdev_addr_lock_key;
5042 static void bond_set_lockdep_class_one(struct net_device *dev,
5043 struct netdev_queue *txq,
5046 lockdep_set_class(&txq->_xmit_lock,
5047 &bonding_netdev_xmit_lock_key);
5050 static void bond_set_lockdep_class(struct net_device *dev)
5052 lockdep_set_class(&dev->addr_list_lock,
5053 &bonding_netdev_addr_lock_key);
5054 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
5058 * Called from registration process
5060 static int bond_init(struct net_device *bond_dev)
5062 struct bonding *bond = netdev_priv(bond_dev);
5064 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5066 bond->wq = create_singlethread_workqueue(bond_dev->name);
5070 bond_set_lockdep_class(bond_dev);
5072 netif_carrier_off(bond_dev);
5074 bond_create_proc_entry(bond);
5075 list_add_tail(&bond->bond_list, &bond_dev_list);
5080 /* Create a new bond based on the specified name and bonding parameters.
5081 * If name is NULL, obtain a suitable "bond%d" name for us.
5082 * Caller must NOT hold rtnl_lock; we need to release it here before we
5083 * set up our sysfs entries.
5085 int bond_create(const char *name)
5087 struct net_device *bond_dev;
5091 /* Check to see if the bond already exists. */
5092 /* FIXME: pass netns from caller */
5093 if (name && __dev_get_by_name(&init_net, name)) {
5094 pr_err(DRV_NAME ": cannot add bond %s; already exists\n",
5100 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5103 pr_err(DRV_NAME ": %s: eek! can't alloc netdev!\n",
5110 res = dev_alloc_name(bond_dev, "bond%d");
5115 res = register_netdevice(bond_dev);
5119 res = bond_create_sysfs_entry(netdev_priv(bond_dev));
5127 unregister_netdevice(bond_dev);
5129 bond_deinit(bond_dev);
5131 free_netdev(bond_dev);
5137 static int __init bonding_init(void)
5142 pr_info("%s", version);
5144 res = bond_check_params(&bonding_defaults);
5148 bond_create_proc_dir();
5150 for (i = 0; i < max_bonds; i++) {
5151 res = bond_create(NULL);
5156 res = bond_create_sysfs();
5160 register_netdevice_notifier(&bond_netdev_notifier);
5161 register_inetaddr_notifier(&bond_inetaddr_notifier);
5162 bond_register_ipv6_notifier();
5174 static void __exit bonding_exit(void)
5176 unregister_netdevice_notifier(&bond_netdev_notifier);
5177 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
5178 bond_unregister_ipv6_notifier();
5180 bond_destroy_sysfs();
5187 module_init(bonding_init);
5188 module_exit(bonding_exit);
5189 MODULE_LICENSE("GPL");
5190 MODULE_VERSION(DRV_VERSION);
5191 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5192 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");