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>
78 #include <net/netns/generic.h>
83 /*---------------------------- Module parameters ----------------------------*/
85 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
86 #define BOND_LINK_MON_INTERV 0
87 #define BOND_LINK_ARP_INTERV 0
89 static int max_bonds = BOND_DEFAULT_MAX_BONDS;
90 static int num_grat_arp = 1;
91 static int num_unsol_na = 1;
92 static int miimon = BOND_LINK_MON_INTERV;
95 static int use_carrier = 1;
98 static char *primary_reselect;
99 static char *lacp_rate;
100 static char *ad_select;
101 static char *xmit_hash_policy;
102 static int arp_interval = BOND_LINK_ARP_INTERV;
103 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
104 static char *arp_validate;
105 static char *fail_over_mac;
106 static struct bond_params bonding_defaults;
108 module_param(max_bonds, int, 0);
109 MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
110 module_param(num_grat_arp, int, 0644);
111 MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
112 module_param(num_unsol_na, int, 0644);
113 MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
114 module_param(miimon, int, 0);
115 MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
116 module_param(updelay, int, 0);
117 MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
118 module_param(downdelay, int, 0);
119 MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
121 module_param(use_carrier, int, 0);
122 MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
123 "0 for off, 1 for on (default)");
124 module_param(mode, charp, 0);
125 MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
126 "1 for active-backup, 2 for balance-xor, "
127 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
128 "6 for balance-alb");
129 module_param(primary, charp, 0);
130 MODULE_PARM_DESC(primary, "Primary network device to use");
131 module_param(primary_reselect, charp, 0);
132 MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
134 "0 for always (default), "
135 "1 for only if speed of primary is "
137 "2 for only on active slave "
139 module_param(lacp_rate, charp, 0);
140 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
142 module_param(ad_select, charp, 0);
143 MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
144 module_param(xmit_hash_policy, charp, 0);
145 MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
146 ", 1 for layer 3+4");
147 module_param(arp_interval, int, 0);
148 MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
149 module_param_array(arp_ip_target, charp, NULL, 0);
150 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
151 module_param(arp_validate, charp, 0);
152 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
153 module_param(fail_over_mac, charp, 0);
154 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
156 /*----------------------------- Global variables ----------------------------*/
158 static const char * const version =
159 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
161 int bond_net_id __read_mostly;
163 static __be32 arp_target[BOND_MAX_ARP_TARGETS];
164 static int arp_ip_count;
165 static int bond_mode = BOND_MODE_ROUNDROBIN;
166 static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
167 static int lacp_fast;
170 const struct bond_parm_tbl bond_lacp_tbl[] = {
171 { "slow", AD_LACP_SLOW},
172 { "fast", AD_LACP_FAST},
176 const struct bond_parm_tbl bond_mode_tbl[] = {
177 { "balance-rr", BOND_MODE_ROUNDROBIN},
178 { "active-backup", BOND_MODE_ACTIVEBACKUP},
179 { "balance-xor", BOND_MODE_XOR},
180 { "broadcast", BOND_MODE_BROADCAST},
181 { "802.3ad", BOND_MODE_8023AD},
182 { "balance-tlb", BOND_MODE_TLB},
183 { "balance-alb", BOND_MODE_ALB},
187 const struct bond_parm_tbl xmit_hashtype_tbl[] = {
188 { "layer2", BOND_XMIT_POLICY_LAYER2},
189 { "layer3+4", BOND_XMIT_POLICY_LAYER34},
190 { "layer2+3", BOND_XMIT_POLICY_LAYER23},
194 const struct bond_parm_tbl arp_validate_tbl[] = {
195 { "none", BOND_ARP_VALIDATE_NONE},
196 { "active", BOND_ARP_VALIDATE_ACTIVE},
197 { "backup", BOND_ARP_VALIDATE_BACKUP},
198 { "all", BOND_ARP_VALIDATE_ALL},
202 const struct bond_parm_tbl fail_over_mac_tbl[] = {
203 { "none", BOND_FOM_NONE},
204 { "active", BOND_FOM_ACTIVE},
205 { "follow", BOND_FOM_FOLLOW},
209 const struct bond_parm_tbl pri_reselect_tbl[] = {
210 { "always", BOND_PRI_RESELECT_ALWAYS},
211 { "better", BOND_PRI_RESELECT_BETTER},
212 { "failure", BOND_PRI_RESELECT_FAILURE},
216 struct bond_parm_tbl ad_select_tbl[] = {
217 { "stable", BOND_AD_STABLE},
218 { "bandwidth", BOND_AD_BANDWIDTH},
219 { "count", BOND_AD_COUNT},
223 /*-------------------------- Forward declarations ---------------------------*/
225 static void bond_send_gratuitous_arp(struct bonding *bond);
226 static int bond_init(struct net_device *bond_dev);
227 static void bond_uninit(struct net_device *bond_dev);
229 /*---------------------------- General routines -----------------------------*/
231 static const char *bond_mode_name(int mode)
233 static const char *names[] = {
234 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
235 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
236 [BOND_MODE_XOR] = "load balancing (xor)",
237 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
238 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
239 [BOND_MODE_TLB] = "transmit load balancing",
240 [BOND_MODE_ALB] = "adaptive load balancing",
243 if (mode < 0 || mode > BOND_MODE_ALB)
249 /*---------------------------------- VLAN -----------------------------------*/
252 * bond_add_vlan - add a new vlan id on bond
253 * @bond: bond that got the notification
254 * @vlan_id: the vlan id to add
256 * Returns -ENOMEM if allocation failed.
258 static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
260 struct vlan_entry *vlan;
262 pr_debug("bond: %s, vlan id %d\n",
263 (bond ? bond->dev->name : "None"), vlan_id);
265 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
269 INIT_LIST_HEAD(&vlan->vlan_list);
270 vlan->vlan_id = vlan_id;
272 write_lock_bh(&bond->lock);
274 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
276 write_unlock_bh(&bond->lock);
278 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
284 * bond_del_vlan - delete a vlan id from bond
285 * @bond: bond that got the notification
286 * @vlan_id: the vlan id to delete
288 * returns -ENODEV if @vlan_id was not found in @bond.
290 static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
292 struct vlan_entry *vlan;
295 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
297 write_lock_bh(&bond->lock);
299 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
300 if (vlan->vlan_id == vlan_id) {
301 list_del(&vlan->vlan_list);
303 if (bond_is_lb(bond))
304 bond_alb_clear_vlan(bond, vlan_id);
306 pr_debug("removed VLAN ID %d from bond %s\n", vlan_id,
311 if (list_empty(&bond->vlan_list) &&
312 (bond->slave_cnt == 0)) {
313 /* Last VLAN removed and no slaves, so
314 * restore block on adding VLANs. This will
315 * be removed once new slaves that are not
316 * VLAN challenged will be added.
318 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
326 pr_debug("couldn't find VLAN ID %d in bond %s\n", vlan_id,
330 write_unlock_bh(&bond->lock);
335 * bond_has_challenged_slaves
336 * @bond: the bond we're working on
338 * Searches the slave list. Returns 1 if a vlan challenged slave
339 * was found, 0 otherwise.
341 * Assumes bond->lock is held.
343 static int bond_has_challenged_slaves(struct bonding *bond)
348 bond_for_each_slave(bond, slave, i) {
349 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
350 pr_debug("found VLAN challenged slave - %s\n",
356 pr_debug("no VLAN challenged slaves found\n");
361 * bond_next_vlan - safely skip to the next item in the vlans list.
362 * @bond: the bond we're working on
363 * @curr: item we're advancing from
365 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
366 * or @curr->next otherwise (even if it is @curr itself again).
368 * Caller must hold bond->lock
370 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
372 struct vlan_entry *next, *last;
374 if (list_empty(&bond->vlan_list))
378 next = list_entry(bond->vlan_list.next,
379 struct vlan_entry, vlan_list);
381 last = list_entry(bond->vlan_list.prev,
382 struct vlan_entry, vlan_list);
384 next = list_entry(bond->vlan_list.next,
385 struct vlan_entry, vlan_list);
387 next = list_entry(curr->vlan_list.next,
388 struct vlan_entry, vlan_list);
396 * bond_dev_queue_xmit - Prepare skb for xmit.
398 * @bond: bond device that got this skb for tx.
399 * @skb: hw accel VLAN tagged skb to transmit
400 * @slave_dev: slave that is supposed to xmit this skbuff
402 * When the bond gets an skb to transmit that is
403 * already hardware accelerated VLAN tagged, and it
404 * needs to relay this skb to a slave that is not
405 * hw accel capable, the skb needs to be "unaccelerated",
406 * i.e. strip the hwaccel tag and re-insert it as part
409 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
410 struct net_device *slave_dev)
412 unsigned short uninitialized_var(vlan_id);
414 if (!list_empty(&bond->vlan_list) &&
415 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
416 vlan_get_tag(skb, &vlan_id) == 0) {
417 skb->dev = slave_dev;
418 skb = vlan_put_tag(skb, vlan_id);
420 /* vlan_put_tag() frees the skb in case of error,
421 * so return success here so the calling functions
422 * won't attempt to free is again.
427 skb->dev = slave_dev;
437 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
438 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
440 * a. This operation is performed in IOCTL context,
441 * b. The operation is protected by the RTNL semaphore in the 8021q code,
442 * c. Holding a lock with BH disabled while directly calling a base driver
443 * entry point is generally a BAD idea.
445 * The design of synchronization/protection for this operation in the 8021q
446 * module is good for one or more VLAN devices over a single physical device
447 * and cannot be extended for a teaming solution like bonding, so there is a
448 * potential race condition here where a net device from the vlan group might
449 * be referenced (either by a base driver or the 8021q code) while it is being
450 * removed from the system. However, it turns out we're not making matters
451 * worse, and if it works for regular VLAN usage it will work here too.
455 * bond_vlan_rx_register - Propagates registration to slaves
456 * @bond_dev: bonding net device that got called
457 * @grp: vlan group being registered
459 static void bond_vlan_rx_register(struct net_device *bond_dev,
460 struct vlan_group *grp)
462 struct bonding *bond = netdev_priv(bond_dev);
468 bond_for_each_slave(bond, slave, i) {
469 struct net_device *slave_dev = slave->dev;
470 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
472 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
473 slave_ops->ndo_vlan_rx_register) {
474 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
480 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
481 * @bond_dev: bonding net device that got called
482 * @vid: vlan id being added
484 static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
486 struct bonding *bond = netdev_priv(bond_dev);
490 bond_for_each_slave(bond, slave, i) {
491 struct net_device *slave_dev = slave->dev;
492 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
494 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
495 slave_ops->ndo_vlan_rx_add_vid) {
496 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
500 res = bond_add_vlan(bond, vid);
503 ": %s: Error: Failed to add vlan id %d\n",
504 bond_dev->name, vid);
509 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
510 * @bond_dev: bonding net device that got called
511 * @vid: vlan id being removed
513 static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
515 struct bonding *bond = netdev_priv(bond_dev);
517 struct net_device *vlan_dev;
520 bond_for_each_slave(bond, slave, i) {
521 struct net_device *slave_dev = slave->dev;
522 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
524 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
525 slave_ops->ndo_vlan_rx_kill_vid) {
526 /* Save and then restore vlan_dev in the grp array,
527 * since the slave's driver might clear it.
529 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
530 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
531 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
535 res = bond_del_vlan(bond, vid);
538 ": %s: Error: Failed to remove vlan id %d\n",
539 bond_dev->name, vid);
543 static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
545 struct vlan_entry *vlan;
546 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
548 write_lock_bh(&bond->lock);
550 if (list_empty(&bond->vlan_list))
553 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
554 slave_ops->ndo_vlan_rx_register)
555 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
557 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
558 !(slave_ops->ndo_vlan_rx_add_vid))
561 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
562 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
565 write_unlock_bh(&bond->lock);
568 static void bond_del_vlans_from_slave(struct bonding *bond,
569 struct net_device *slave_dev)
571 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
572 struct vlan_entry *vlan;
573 struct net_device *vlan_dev;
575 write_lock_bh(&bond->lock);
577 if (list_empty(&bond->vlan_list))
580 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
581 !(slave_ops->ndo_vlan_rx_kill_vid))
584 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
585 /* Save and then restore vlan_dev in the grp array,
586 * since the slave's driver might clear it.
588 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
589 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
590 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
594 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
595 slave_ops->ndo_vlan_rx_register)
596 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
599 write_unlock_bh(&bond->lock);
602 /*------------------------------- Link status -------------------------------*/
605 * Set the carrier state for the master according to the state of its
606 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
607 * do special 802.3ad magic.
609 * Returns zero if carrier state does not change, nonzero if it does.
611 static int bond_set_carrier(struct bonding *bond)
616 if (bond->slave_cnt == 0)
619 if (bond->params.mode == BOND_MODE_8023AD)
620 return bond_3ad_set_carrier(bond);
622 bond_for_each_slave(bond, slave, i) {
623 if (slave->link == BOND_LINK_UP) {
624 if (!netif_carrier_ok(bond->dev)) {
625 netif_carrier_on(bond->dev);
633 if (netif_carrier_ok(bond->dev)) {
634 netif_carrier_off(bond->dev);
641 * Get link speed and duplex from the slave's base driver
642 * using ethtool. If for some reason the call fails or the
643 * values are invalid, fake speed and duplex to 100/Full
646 static int bond_update_speed_duplex(struct slave *slave)
648 struct net_device *slave_dev = slave->dev;
649 struct ethtool_cmd etool;
652 /* Fake speed and duplex */
653 slave->speed = SPEED_100;
654 slave->duplex = DUPLEX_FULL;
656 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
659 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
663 switch (etool.speed) {
673 switch (etool.duplex) {
681 slave->speed = etool.speed;
682 slave->duplex = etool.duplex;
688 * if <dev> supports MII link status reporting, check its link status.
690 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
691 * depending upon the setting of the use_carrier parameter.
693 * Return either BMSR_LSTATUS, meaning that the link is up (or we
694 * can't tell and just pretend it is), or 0, meaning that the link is
697 * If reporting is non-zero, instead of faking link up, return -1 if
698 * both ETHTOOL and MII ioctls fail (meaning the device does not
699 * support them). If use_carrier is set, return whatever it says.
700 * It'd be nice if there was a good way to tell if a driver supports
701 * netif_carrier, but there really isn't.
703 static int bond_check_dev_link(struct bonding *bond,
704 struct net_device *slave_dev, int reporting)
706 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
707 int (*ioctl)(struct net_device *, struct ifreq *, int);
709 struct mii_ioctl_data *mii;
711 if (!reporting && !netif_running(slave_dev))
714 if (bond->params.use_carrier)
715 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
717 /* Try to get link status using Ethtool first. */
718 if (slave_dev->ethtool_ops) {
719 if (slave_dev->ethtool_ops->get_link) {
722 link = slave_dev->ethtool_ops->get_link(slave_dev);
724 return link ? BMSR_LSTATUS : 0;
728 /* Ethtool can't be used, fallback to MII ioctls. */
729 ioctl = slave_ops->ndo_do_ioctl;
731 /* TODO: set pointer to correct ioctl on a per team member */
732 /* bases to make this more efficient. that is, once */
733 /* we determine the correct ioctl, we will always */
734 /* call it and not the others for that team */
738 * We cannot assume that SIOCGMIIPHY will also read a
739 * register; not all network drivers (e.g., e100)
743 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
744 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
746 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
747 mii->reg_num = MII_BMSR;
748 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
749 return mii->val_out & BMSR_LSTATUS;
754 * If reporting, report that either there's no dev->do_ioctl,
755 * or both SIOCGMIIREG and get_link failed (meaning that we
756 * cannot report link status). If not reporting, pretend
759 return reporting ? -1 : BMSR_LSTATUS;
762 /*----------------------------- Multicast list ------------------------------*/
765 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
767 static inline int bond_is_dmi_same(const struct dev_mc_list *dmi1,
768 const struct dev_mc_list *dmi2)
770 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
771 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
775 * returns dmi entry if found, NULL otherwise
777 static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi,
778 struct dev_mc_list *mc_list)
780 struct dev_mc_list *idmi;
782 for (idmi = mc_list; idmi; idmi = idmi->next) {
783 if (bond_is_dmi_same(dmi, idmi))
791 * Push the promiscuity flag down to appropriate slaves
793 static int bond_set_promiscuity(struct bonding *bond, int inc)
796 if (USES_PRIMARY(bond->params.mode)) {
797 /* write lock already acquired */
798 if (bond->curr_active_slave) {
799 err = dev_set_promiscuity(bond->curr_active_slave->dev,
805 bond_for_each_slave(bond, slave, i) {
806 err = dev_set_promiscuity(slave->dev, inc);
815 * Push the allmulti flag down to all slaves
817 static int bond_set_allmulti(struct bonding *bond, int inc)
820 if (USES_PRIMARY(bond->params.mode)) {
821 /* write lock already acquired */
822 if (bond->curr_active_slave) {
823 err = dev_set_allmulti(bond->curr_active_slave->dev,
829 bond_for_each_slave(bond, slave, i) {
830 err = dev_set_allmulti(slave->dev, inc);
839 * Add a Multicast address to slaves
842 static void bond_mc_add(struct bonding *bond, void *addr, int alen)
844 if (USES_PRIMARY(bond->params.mode)) {
845 /* write lock already acquired */
846 if (bond->curr_active_slave)
847 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
852 bond_for_each_slave(bond, slave, i)
853 dev_mc_add(slave->dev, addr, alen, 0);
858 * Remove a multicast address from slave
861 static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
863 if (USES_PRIMARY(bond->params.mode)) {
864 /* write lock already acquired */
865 if (bond->curr_active_slave)
866 dev_mc_delete(bond->curr_active_slave->dev, addr,
871 bond_for_each_slave(bond, slave, i) {
872 dev_mc_delete(slave->dev, addr, alen, 0);
879 * Retrieve the list of registered multicast addresses for the bonding
880 * device and retransmit an IGMP JOIN request to the current active
883 static void bond_resend_igmp_join_requests(struct bonding *bond)
885 struct in_device *in_dev;
886 struct ip_mc_list *im;
889 in_dev = __in_dev_get_rcu(bond->dev);
891 for (im = in_dev->mc_list; im; im = im->next)
892 ip_mc_rejoin_group(im);
899 * Totally destroys the mc_list in bond
901 static void bond_mc_list_destroy(struct bonding *bond)
903 struct dev_mc_list *dmi;
907 bond->mc_list = dmi->next;
912 bond->mc_list = NULL;
916 * Copy all the Multicast addresses from src to the bonding device dst
918 static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
921 struct dev_mc_list *dmi, *new_dmi;
923 for (dmi = mc_list; dmi; dmi = dmi->next) {
924 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
927 /* FIXME: Potential memory leak !!! */
931 new_dmi->next = bond->mc_list;
932 bond->mc_list = new_dmi;
933 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
934 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
935 new_dmi->dmi_users = dmi->dmi_users;
936 new_dmi->dmi_gusers = dmi->dmi_gusers;
943 * flush all members of flush->mc_list from device dev->mc_list
945 static void bond_mc_list_flush(struct net_device *bond_dev,
946 struct net_device *slave_dev)
948 struct bonding *bond = netdev_priv(bond_dev);
949 struct dev_mc_list *dmi;
951 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
952 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
954 if (bond->params.mode == BOND_MODE_8023AD) {
955 /* del lacpdu mc addr from mc list */
956 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
958 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
962 /*--------------------------- Active slave change ---------------------------*/
965 * Update the mc list and multicast-related flags for the new and
966 * old active slaves (if any) according to the multicast mode, and
967 * promiscuous flags unconditionally.
969 static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
970 struct slave *old_active)
972 struct dev_mc_list *dmi;
974 if (!USES_PRIMARY(bond->params.mode))
975 /* nothing to do - mc list is already up-to-date on
981 if (bond->dev->flags & IFF_PROMISC)
982 dev_set_promiscuity(old_active->dev, -1);
984 if (bond->dev->flags & IFF_ALLMULTI)
985 dev_set_allmulti(old_active->dev, -1);
987 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
988 dev_mc_delete(old_active->dev, dmi->dmi_addr,
989 dmi->dmi_addrlen, 0);
993 /* FIXME: Signal errors upstream. */
994 if (bond->dev->flags & IFF_PROMISC)
995 dev_set_promiscuity(new_active->dev, 1);
997 if (bond->dev->flags & IFF_ALLMULTI)
998 dev_set_allmulti(new_active->dev, 1);
1000 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
1001 dev_mc_add(new_active->dev, dmi->dmi_addr,
1002 dmi->dmi_addrlen, 0);
1003 bond_resend_igmp_join_requests(bond);
1008 * bond_do_fail_over_mac
1010 * Perform special MAC address swapping for fail_over_mac settings
1012 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
1014 static void bond_do_fail_over_mac(struct bonding *bond,
1015 struct slave *new_active,
1016 struct slave *old_active)
1017 __releases(&bond->curr_slave_lock)
1018 __releases(&bond->lock)
1019 __acquires(&bond->lock)
1020 __acquires(&bond->curr_slave_lock)
1022 u8 tmp_mac[ETH_ALEN];
1023 struct sockaddr saddr;
1026 switch (bond->params.fail_over_mac) {
1027 case BOND_FOM_ACTIVE:
1029 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1030 new_active->dev->addr_len);
1032 case BOND_FOM_FOLLOW:
1034 * if new_active && old_active, swap them
1035 * if just old_active, do nothing (going to no active slave)
1036 * if just new_active, set new_active to bond's MAC
1041 write_unlock_bh(&bond->curr_slave_lock);
1042 read_unlock(&bond->lock);
1045 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1046 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1048 saddr.sa_family = new_active->dev->type;
1050 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1051 saddr.sa_family = bond->dev->type;
1054 rv = dev_set_mac_address(new_active->dev, &saddr);
1057 ": %s: Error %d setting MAC of slave %s\n",
1058 bond->dev->name, -rv, new_active->dev->name);
1065 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1066 saddr.sa_family = old_active->dev->type;
1068 rv = dev_set_mac_address(old_active->dev, &saddr);
1071 ": %s: Error %d setting MAC of slave %s\n",
1072 bond->dev->name, -rv, new_active->dev->name);
1074 read_lock(&bond->lock);
1075 write_lock_bh(&bond->curr_slave_lock);
1079 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1080 bond->dev->name, bond->params.fail_over_mac);
1086 static bool bond_should_change_active(struct bonding *bond)
1088 struct slave *prim = bond->primary_slave;
1089 struct slave *curr = bond->curr_active_slave;
1091 if (!prim || !curr || curr->link != BOND_LINK_UP)
1093 if (bond->force_primary) {
1094 bond->force_primary = false;
1097 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
1098 (prim->speed < curr->speed ||
1099 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
1101 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
1107 * find_best_interface - select the best available slave to be the active one
1108 * @bond: our bonding struct
1110 * Warning: Caller must hold curr_slave_lock for writing.
1112 static struct slave *bond_find_best_slave(struct bonding *bond)
1114 struct slave *new_active, *old_active;
1115 struct slave *bestslave = NULL;
1116 int mintime = bond->params.updelay;
1119 new_active = bond->curr_active_slave;
1121 if (!new_active) { /* there were no active slaves left */
1122 if (bond->slave_cnt > 0) /* found one slave */
1123 new_active = bond->first_slave;
1125 return NULL; /* still no slave, return NULL */
1128 if ((bond->primary_slave) &&
1129 bond->primary_slave->link == BOND_LINK_UP &&
1130 bond_should_change_active(bond)) {
1131 new_active = bond->primary_slave;
1134 /* remember where to stop iterating over the slaves */
1135 old_active = new_active;
1137 bond_for_each_slave_from(bond, new_active, i, old_active) {
1138 if (new_active->link == BOND_LINK_UP) {
1140 } else if (new_active->link == BOND_LINK_BACK &&
1141 IS_UP(new_active->dev)) {
1142 /* link up, but waiting for stabilization */
1143 if (new_active->delay < mintime) {
1144 mintime = new_active->delay;
1145 bestslave = new_active;
1154 * change_active_interface - change the active slave into the specified one
1155 * @bond: our bonding struct
1156 * @new: the new slave to make the active one
1158 * Set the new slave to the bond's settings and unset them on the old
1159 * curr_active_slave.
1160 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1162 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1163 * because it is apparently the best available slave we have, even though its
1164 * updelay hasn't timed out yet.
1166 * If new_active is not NULL, caller must hold bond->lock for read and
1167 * curr_slave_lock for write_bh.
1169 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1171 struct slave *old_active = bond->curr_active_slave;
1173 if (old_active == new_active)
1177 new_active->jiffies = jiffies;
1179 if (new_active->link == BOND_LINK_BACK) {
1180 if (USES_PRIMARY(bond->params.mode)) {
1182 ": %s: making interface %s the new "
1183 "active one %d ms earlier.\n",
1184 bond->dev->name, new_active->dev->name,
1185 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1188 new_active->delay = 0;
1189 new_active->link = BOND_LINK_UP;
1191 if (bond->params.mode == BOND_MODE_8023AD)
1192 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1194 if (bond_is_lb(bond))
1195 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1197 if (USES_PRIMARY(bond->params.mode)) {
1199 ": %s: making interface %s the new "
1201 bond->dev->name, new_active->dev->name);
1206 if (USES_PRIMARY(bond->params.mode))
1207 bond_mc_swap(bond, new_active, old_active);
1209 if (bond_is_lb(bond)) {
1210 bond_alb_handle_active_change(bond, new_active);
1212 bond_set_slave_inactive_flags(old_active);
1214 bond_set_slave_active_flags(new_active);
1216 bond->curr_active_slave = new_active;
1219 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1221 bond_set_slave_inactive_flags(old_active);
1224 bond_set_slave_active_flags(new_active);
1226 if (bond->params.fail_over_mac)
1227 bond_do_fail_over_mac(bond, new_active,
1230 bond->send_grat_arp = bond->params.num_grat_arp;
1231 bond_send_gratuitous_arp(bond);
1233 bond->send_unsol_na = bond->params.num_unsol_na;
1234 bond_send_unsolicited_na(bond);
1236 write_unlock_bh(&bond->curr_slave_lock);
1237 read_unlock(&bond->lock);
1239 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
1241 read_lock(&bond->lock);
1242 write_lock_bh(&bond->curr_slave_lock);
1248 * bond_select_active_slave - select a new active slave, if needed
1249 * @bond: our bonding struct
1251 * This functions should be called when one of the following occurs:
1252 * - The old curr_active_slave has been released or lost its link.
1253 * - The primary_slave has got its link back.
1254 * - A slave has got its link back and there's no old curr_active_slave.
1256 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1258 void bond_select_active_slave(struct bonding *bond)
1260 struct slave *best_slave;
1263 best_slave = bond_find_best_slave(bond);
1264 if (best_slave != bond->curr_active_slave) {
1265 bond_change_active_slave(bond, best_slave);
1266 rv = bond_set_carrier(bond);
1270 if (netif_carrier_ok(bond->dev)) {
1272 ": %s: first active interface up!\n",
1275 pr_info(DRV_NAME ": %s: "
1276 "now running without any active interface !\n",
1282 /*--------------------------- slave list handling ---------------------------*/
1285 * This function attaches the slave to the end of list.
1287 * bond->lock held for writing by caller.
1289 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1291 if (bond->first_slave == NULL) { /* attaching the first slave */
1292 new_slave->next = new_slave;
1293 new_slave->prev = new_slave;
1294 bond->first_slave = new_slave;
1296 new_slave->next = bond->first_slave;
1297 new_slave->prev = bond->first_slave->prev;
1298 new_slave->next->prev = new_slave;
1299 new_slave->prev->next = new_slave;
1306 * This function detaches the slave from the list.
1307 * WARNING: no check is made to verify if the slave effectively
1308 * belongs to <bond>.
1309 * Nothing is freed on return, structures are just unchained.
1310 * If any slave pointer in bond was pointing to <slave>,
1311 * it should be changed by the calling function.
1313 * bond->lock held for writing by caller.
1315 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1318 slave->next->prev = slave->prev;
1321 slave->prev->next = slave->next;
1323 if (bond->first_slave == slave) { /* slave is the first slave */
1324 if (bond->slave_cnt > 1) { /* there are more slave */
1325 bond->first_slave = slave->next;
1327 bond->first_slave = NULL; /* slave was the last one */
1336 /*---------------------------------- IOCTL ----------------------------------*/
1338 static int bond_sethwaddr(struct net_device *bond_dev,
1339 struct net_device *slave_dev)
1341 pr_debug("bond_dev=%p\n", bond_dev);
1342 pr_debug("slave_dev=%p\n", slave_dev);
1343 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1344 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1348 #define BOND_VLAN_FEATURES \
1349 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1350 NETIF_F_HW_VLAN_FILTER)
1353 * Compute the common dev->feature set available to all slaves. Some
1354 * feature bits are managed elsewhere, so preserve those feature bits
1355 * on the master device.
1357 static int bond_compute_features(struct bonding *bond)
1359 struct slave *slave;
1360 struct net_device *bond_dev = bond->dev;
1361 unsigned long features = bond_dev->features;
1362 unsigned long vlan_features = 0;
1363 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1364 bond_dev->hard_header_len);
1367 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1368 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1370 if (!bond->first_slave)
1373 features &= ~NETIF_F_ONE_FOR_ALL;
1375 vlan_features = bond->first_slave->dev->vlan_features;
1376 bond_for_each_slave(bond, slave, i) {
1377 features = netdev_increment_features(features,
1378 slave->dev->features,
1379 NETIF_F_ONE_FOR_ALL);
1380 vlan_features = netdev_increment_features(vlan_features,
1381 slave->dev->vlan_features,
1382 NETIF_F_ONE_FOR_ALL);
1383 if (slave->dev->hard_header_len > max_hard_header_len)
1384 max_hard_header_len = slave->dev->hard_header_len;
1388 features |= (bond_dev->features & BOND_VLAN_FEATURES);
1389 bond_dev->features = netdev_fix_features(features, NULL);
1390 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
1391 bond_dev->hard_header_len = max_hard_header_len;
1396 static void bond_setup_by_slave(struct net_device *bond_dev,
1397 struct net_device *slave_dev)
1399 struct bonding *bond = netdev_priv(bond_dev);
1401 bond_dev->header_ops = slave_dev->header_ops;
1403 bond_dev->type = slave_dev->type;
1404 bond_dev->hard_header_len = slave_dev->hard_header_len;
1405 bond_dev->addr_len = slave_dev->addr_len;
1407 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1408 slave_dev->addr_len);
1409 bond->setup_by_slave = 1;
1412 /* enslave device <slave> to bond device <master> */
1413 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1415 struct bonding *bond = netdev_priv(bond_dev);
1416 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1417 struct slave *new_slave = NULL;
1418 struct dev_mc_list *dmi;
1419 struct sockaddr addr;
1421 int old_features = bond_dev->features;
1424 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1425 slave_ops->ndo_do_ioctl == NULL) {
1427 ": %s: Warning: no link monitoring support for %s\n",
1428 bond_dev->name, slave_dev->name);
1431 /* bond must be initialized by bond_open() before enslaving */
1432 if (!(bond_dev->flags & IFF_UP)) {
1434 " %s: master_dev is not up in bond_enslave\n",
1438 /* already enslaved */
1439 if (slave_dev->flags & IFF_SLAVE) {
1440 pr_debug("Error, Device was already enslaved\n");
1444 /* vlan challenged mutual exclusion */
1445 /* no need to lock since we're protected by rtnl_lock */
1446 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1447 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1448 if (!list_empty(&bond->vlan_list)) {
1450 ": %s: Error: cannot enslave VLAN "
1451 "challenged slave %s on VLAN enabled "
1452 "bond %s\n", bond_dev->name, slave_dev->name,
1457 ": %s: Warning: enslaved VLAN challenged "
1458 "slave %s. Adding VLANs will be blocked as "
1459 "long as %s is part of bond %s\n",
1460 bond_dev->name, slave_dev->name, slave_dev->name,
1462 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1465 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1466 if (bond->slave_cnt == 0) {
1467 /* First slave, and it is not VLAN challenged,
1468 * so remove the block of adding VLANs over the bond.
1470 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1475 * Old ifenslave binaries are no longer supported. These can
1476 * be identified with moderate accuracy by the state of the slave:
1477 * the current ifenslave will set the interface down prior to
1478 * enslaving it; the old ifenslave will not.
1480 if ((slave_dev->flags & IFF_UP)) {
1481 pr_err(DRV_NAME ": %s is up. "
1482 "This may be due to an out of date ifenslave.\n",
1485 goto err_undo_flags;
1488 /* set bonding device ether type by slave - bonding netdevices are
1489 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1490 * there is a need to override some of the type dependent attribs/funcs.
1492 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1493 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1495 if (bond->slave_cnt == 0) {
1496 if (bond_dev->type != slave_dev->type) {
1497 pr_debug("%s: change device type from %d to %d\n",
1498 bond_dev->name, bond_dev->type, slave_dev->type);
1500 netdev_bonding_change(bond_dev, NETDEV_BONDING_OLDTYPE);
1502 if (slave_dev->type != ARPHRD_ETHER)
1503 bond_setup_by_slave(bond_dev, slave_dev);
1505 ether_setup(bond_dev);
1507 netdev_bonding_change(bond_dev, NETDEV_BONDING_NEWTYPE);
1509 } else if (bond_dev->type != slave_dev->type) {
1510 pr_err(DRV_NAME ": %s ether type (%d) is different "
1511 "from other slaves (%d), can not enslave it.\n",
1513 slave_dev->type, bond_dev->type);
1515 goto err_undo_flags;
1518 if (slave_ops->ndo_set_mac_address == NULL) {
1519 if (bond->slave_cnt == 0) {
1521 ": %s: Warning: The first slave device "
1522 "specified does not support setting the MAC "
1523 "address. Setting fail_over_mac to active.",
1525 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1526 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1528 ": %s: Error: The slave device specified "
1529 "does not support setting the MAC address, "
1530 "but fail_over_mac is not set to active.\n"
1533 goto err_undo_flags;
1537 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1540 goto err_undo_flags;
1543 /* save slave's original flags before calling
1544 * netdev_set_master and dev_open
1546 new_slave->original_flags = slave_dev->flags;
1549 * Save slave's original ("permanent") mac address for modes
1550 * that need it, and for restoring it upon release, and then
1551 * set it to the master's address
1553 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1555 if (!bond->params.fail_over_mac) {
1557 * Set slave to master's mac address. The application already
1558 * set the master's mac address to that of the first slave
1560 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1561 addr.sa_family = slave_dev->type;
1562 res = dev_set_mac_address(slave_dev, &addr);
1564 pr_debug("Error %d calling set_mac_address\n", res);
1569 res = netdev_set_master(slave_dev, bond_dev);
1571 pr_debug("Error %d calling netdev_set_master\n", res);
1572 goto err_restore_mac;
1574 /* open the slave since the application closed it */
1575 res = dev_open(slave_dev);
1577 pr_debug("Opening slave %s failed\n", slave_dev->name);
1578 goto err_unset_master;
1581 new_slave->dev = slave_dev;
1582 slave_dev->priv_flags |= IFF_BONDING;
1584 if (bond_is_lb(bond)) {
1585 /* bond_alb_init_slave() must be called before all other stages since
1586 * it might fail and we do not want to have to undo everything
1588 res = bond_alb_init_slave(bond, new_slave);
1593 /* If the mode USES_PRIMARY, then the new slave gets the
1594 * master's promisc (and mc) settings only if it becomes the
1595 * curr_active_slave, and that is taken care of later when calling
1596 * bond_change_active()
1598 if (!USES_PRIMARY(bond->params.mode)) {
1599 /* set promiscuity level to new slave */
1600 if (bond_dev->flags & IFF_PROMISC) {
1601 res = dev_set_promiscuity(slave_dev, 1);
1606 /* set allmulti level to new slave */
1607 if (bond_dev->flags & IFF_ALLMULTI) {
1608 res = dev_set_allmulti(slave_dev, 1);
1613 netif_addr_lock_bh(bond_dev);
1614 /* upload master's mc_list to new slave */
1615 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
1616 dev_mc_add(slave_dev, dmi->dmi_addr,
1617 dmi->dmi_addrlen, 0);
1618 netif_addr_unlock_bh(bond_dev);
1621 if (bond->params.mode == BOND_MODE_8023AD) {
1622 /* add lacpdu mc addr to mc list */
1623 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1625 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1628 bond_add_vlans_on_slave(bond, slave_dev);
1630 write_lock_bh(&bond->lock);
1632 bond_attach_slave(bond, new_slave);
1634 new_slave->delay = 0;
1635 new_slave->link_failure_count = 0;
1637 bond_compute_features(bond);
1639 write_unlock_bh(&bond->lock);
1641 read_lock(&bond->lock);
1643 new_slave->last_arp_rx = jiffies;
1645 if (bond->params.miimon && !bond->params.use_carrier) {
1646 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1648 if ((link_reporting == -1) && !bond->params.arp_interval) {
1650 * miimon is set but a bonded network driver
1651 * does not support ETHTOOL/MII and
1652 * arp_interval is not set. Note: if
1653 * use_carrier is enabled, we will never go
1654 * here (because netif_carrier is always
1655 * supported); thus, we don't need to change
1656 * the messages for netif_carrier.
1659 ": %s: Warning: MII and ETHTOOL support not "
1660 "available for interface %s, and "
1661 "arp_interval/arp_ip_target module parameters "
1662 "not specified, thus bonding will not detect "
1663 "link failures! see bonding.txt for details.\n",
1664 bond_dev->name, slave_dev->name);
1665 } else if (link_reporting == -1) {
1666 /* unable get link status using mii/ethtool */
1668 ": %s: Warning: can't get link status from "
1669 "interface %s; the network driver associated "
1670 "with this interface does not support MII or "
1671 "ETHTOOL link status reporting, thus miimon "
1672 "has no effect on this interface.\n",
1673 bond_dev->name, slave_dev->name);
1677 /* check for initial state */
1678 if (!bond->params.miimon ||
1679 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1680 if (bond->params.updelay) {
1681 pr_debug("Initial state of slave_dev is "
1682 "BOND_LINK_BACK\n");
1683 new_slave->link = BOND_LINK_BACK;
1684 new_slave->delay = bond->params.updelay;
1686 pr_debug("Initial state of slave_dev is "
1688 new_slave->link = BOND_LINK_UP;
1690 new_slave->jiffies = jiffies;
1692 pr_debug("Initial state of slave_dev is "
1693 "BOND_LINK_DOWN\n");
1694 new_slave->link = BOND_LINK_DOWN;
1697 if (bond_update_speed_duplex(new_slave) &&
1698 (new_slave->link != BOND_LINK_DOWN)) {
1700 ": %s: Warning: failed to get speed and duplex from %s, "
1701 "assumed to be 100Mb/sec and Full.\n",
1702 bond_dev->name, new_slave->dev->name);
1704 if (bond->params.mode == BOND_MODE_8023AD) {
1706 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1707 "support in base driver for proper aggregator "
1708 "selection.\n", bond_dev->name);
1712 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1713 /* if there is a primary slave, remember it */
1714 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1715 bond->primary_slave = new_slave;
1716 bond->force_primary = true;
1720 write_lock_bh(&bond->curr_slave_lock);
1722 switch (bond->params.mode) {
1723 case BOND_MODE_ACTIVEBACKUP:
1724 bond_set_slave_inactive_flags(new_slave);
1725 bond_select_active_slave(bond);
1727 case BOND_MODE_8023AD:
1728 /* in 802.3ad mode, the internal mechanism
1729 * will activate the slaves in the selected
1732 bond_set_slave_inactive_flags(new_slave);
1733 /* if this is the first slave */
1734 if (bond->slave_cnt == 1) {
1735 SLAVE_AD_INFO(new_slave).id = 1;
1736 /* Initialize AD with the number of times that the AD timer is called in 1 second
1737 * can be called only after the mac address of the bond is set
1739 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1740 bond->params.lacp_fast);
1742 SLAVE_AD_INFO(new_slave).id =
1743 SLAVE_AD_INFO(new_slave->prev).id + 1;
1746 bond_3ad_bind_slave(new_slave);
1750 new_slave->state = BOND_STATE_ACTIVE;
1751 bond_set_slave_inactive_flags(new_slave);
1752 bond_select_active_slave(bond);
1755 pr_debug("This slave is always active in trunk mode\n");
1757 /* always active in trunk mode */
1758 new_slave->state = BOND_STATE_ACTIVE;
1760 /* In trunking mode there is little meaning to curr_active_slave
1761 * anyway (it holds no special properties of the bond device),
1762 * so we can change it without calling change_active_interface()
1764 if (!bond->curr_active_slave)
1765 bond->curr_active_slave = new_slave;
1768 } /* switch(bond_mode) */
1770 write_unlock_bh(&bond->curr_slave_lock);
1772 bond_set_carrier(bond);
1774 read_unlock(&bond->lock);
1776 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1781 ": %s: enslaving %s as a%s interface with a%s link.\n",
1782 bond_dev->name, slave_dev->name,
1783 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1784 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1786 /* enslave is successful */
1789 /* Undo stages on error */
1791 dev_close(slave_dev);
1794 netdev_set_master(slave_dev, NULL);
1797 if (!bond->params.fail_over_mac) {
1798 /* XXX TODO - fom follow mode needs to change master's
1799 * MAC if this slave's MAC is in use by the bond, or at
1800 * least print a warning.
1802 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1803 addr.sa_family = slave_dev->type;
1804 dev_set_mac_address(slave_dev, &addr);
1811 bond_dev->features = old_features;
1817 * Try to release the slave device <slave> from the bond device <master>
1818 * It is legal to access curr_active_slave without a lock because all the function
1821 * The rules for slave state should be:
1822 * for Active/Backup:
1823 * Active stays on all backups go down
1824 * for Bonded connections:
1825 * The first up interface should be left on and all others downed.
1827 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1829 struct bonding *bond = netdev_priv(bond_dev);
1830 struct slave *slave, *oldcurrent;
1831 struct sockaddr addr;
1833 /* slave is not a slave or master is not master of this slave */
1834 if (!(slave_dev->flags & IFF_SLAVE) ||
1835 (slave_dev->master != bond_dev)) {
1837 ": %s: Error: cannot release %s.\n",
1838 bond_dev->name, slave_dev->name);
1842 write_lock_bh(&bond->lock);
1844 slave = bond_get_slave_by_dev(bond, slave_dev);
1846 /* not a slave of this bond */
1848 ": %s: %s not enslaved\n",
1849 bond_dev->name, slave_dev->name);
1850 write_unlock_bh(&bond->lock);
1854 if (!bond->params.fail_over_mac) {
1855 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1856 bond->slave_cnt > 1)
1858 ": %s: Warning: the permanent HWaddr of %s - "
1859 "%pM - is still in use by %s. "
1860 "Set the HWaddr of %s to a different address "
1861 "to avoid conflicts.\n",
1862 bond_dev->name, slave_dev->name,
1864 bond_dev->name, slave_dev->name);
1867 /* Inform AD package of unbinding of slave. */
1868 if (bond->params.mode == BOND_MODE_8023AD) {
1869 /* must be called before the slave is
1870 * detached from the list
1872 bond_3ad_unbind_slave(slave);
1876 ": %s: releasing %s interface %s\n",
1878 (slave->state == BOND_STATE_ACTIVE)
1879 ? "active" : "backup",
1882 oldcurrent = bond->curr_active_slave;
1884 bond->current_arp_slave = NULL;
1886 /* release the slave from its bond */
1887 bond_detach_slave(bond, slave);
1889 bond_compute_features(bond);
1891 if (bond->primary_slave == slave)
1892 bond->primary_slave = NULL;
1894 if (oldcurrent == slave)
1895 bond_change_active_slave(bond, NULL);
1897 if (bond_is_lb(bond)) {
1898 /* Must be called only after the slave has been
1899 * detached from the list and the curr_active_slave
1900 * has been cleared (if our_slave == old_current),
1901 * but before a new active slave is selected.
1903 write_unlock_bh(&bond->lock);
1904 bond_alb_deinit_slave(bond, slave);
1905 write_lock_bh(&bond->lock);
1908 if (oldcurrent == slave) {
1910 * Note that we hold RTNL over this sequence, so there
1911 * is no concern that another slave add/remove event
1914 write_unlock_bh(&bond->lock);
1915 read_lock(&bond->lock);
1916 write_lock_bh(&bond->curr_slave_lock);
1918 bond_select_active_slave(bond);
1920 write_unlock_bh(&bond->curr_slave_lock);
1921 read_unlock(&bond->lock);
1922 write_lock_bh(&bond->lock);
1925 if (bond->slave_cnt == 0) {
1926 bond_set_carrier(bond);
1928 /* if the last slave was removed, zero the mac address
1929 * of the master so it will be set by the application
1930 * to the mac address of the first slave
1932 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1934 if (list_empty(&bond->vlan_list)) {
1935 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1938 ": %s: Warning: clearing HW address of %s while it "
1939 "still has VLANs.\n",
1940 bond_dev->name, bond_dev->name);
1942 ": %s: When re-adding slaves, make sure the bond's "
1943 "HW address matches its VLANs'.\n",
1946 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1947 !bond_has_challenged_slaves(bond)) {
1949 ": %s: last VLAN challenged slave %s "
1950 "left bond %s. VLAN blocking is removed\n",
1951 bond_dev->name, slave_dev->name, bond_dev->name);
1952 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1955 write_unlock_bh(&bond->lock);
1957 /* must do this from outside any spinlocks */
1958 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1960 bond_del_vlans_from_slave(bond, slave_dev);
1962 /* If the mode USES_PRIMARY, then we should only remove its
1963 * promisc and mc settings if it was the curr_active_slave, but that was
1964 * already taken care of above when we detached the slave
1966 if (!USES_PRIMARY(bond->params.mode)) {
1967 /* unset promiscuity level from slave */
1968 if (bond_dev->flags & IFF_PROMISC)
1969 dev_set_promiscuity(slave_dev, -1);
1971 /* unset allmulti level from slave */
1972 if (bond_dev->flags & IFF_ALLMULTI)
1973 dev_set_allmulti(slave_dev, -1);
1975 /* flush master's mc_list from slave */
1976 netif_addr_lock_bh(bond_dev);
1977 bond_mc_list_flush(bond_dev, slave_dev);
1978 netif_addr_unlock_bh(bond_dev);
1981 netdev_set_master(slave_dev, NULL);
1983 /* close slave before restoring its mac address */
1984 dev_close(slave_dev);
1986 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1987 /* restore original ("permanent") mac address */
1988 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1989 addr.sa_family = slave_dev->type;
1990 dev_set_mac_address(slave_dev, &addr);
1993 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1994 IFF_SLAVE_INACTIVE | IFF_BONDING |
1999 return 0; /* deletion OK */
2003 * First release a slave and than destroy the bond if no more slaves are left.
2004 * Must be under rtnl_lock when this function is called.
2006 int bond_release_and_destroy(struct net_device *bond_dev,
2007 struct net_device *slave_dev)
2009 struct bonding *bond = netdev_priv(bond_dev);
2012 ret = bond_release(bond_dev, slave_dev);
2013 if ((ret == 0) && (bond->slave_cnt == 0)) {
2014 pr_info(DRV_NAME ": %s: destroying bond %s.\n",
2015 bond_dev->name, bond_dev->name);
2016 unregister_netdevice(bond_dev);
2022 * This function releases all slaves.
2024 static int bond_release_all(struct net_device *bond_dev)
2026 struct bonding *bond = netdev_priv(bond_dev);
2027 struct slave *slave;
2028 struct net_device *slave_dev;
2029 struct sockaddr addr;
2031 write_lock_bh(&bond->lock);
2033 netif_carrier_off(bond_dev);
2035 if (bond->slave_cnt == 0)
2038 bond->current_arp_slave = NULL;
2039 bond->primary_slave = NULL;
2040 bond_change_active_slave(bond, NULL);
2042 while ((slave = bond->first_slave) != NULL) {
2043 /* Inform AD package of unbinding of slave
2044 * before slave is detached from the list.
2046 if (bond->params.mode == BOND_MODE_8023AD)
2047 bond_3ad_unbind_slave(slave);
2049 slave_dev = slave->dev;
2050 bond_detach_slave(bond, slave);
2052 /* now that the slave is detached, unlock and perform
2053 * all the undo steps that should not be called from
2056 write_unlock_bh(&bond->lock);
2058 if (bond_is_lb(bond)) {
2059 /* must be called only after the slave
2060 * has been detached from the list
2062 bond_alb_deinit_slave(bond, slave);
2065 bond_compute_features(bond);
2067 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2068 bond_del_vlans_from_slave(bond, slave_dev);
2070 /* If the mode USES_PRIMARY, then we should only remove its
2071 * promisc and mc settings if it was the curr_active_slave, but that was
2072 * already taken care of above when we detached the slave
2074 if (!USES_PRIMARY(bond->params.mode)) {
2075 /* unset promiscuity level from slave */
2076 if (bond_dev->flags & IFF_PROMISC)
2077 dev_set_promiscuity(slave_dev, -1);
2079 /* unset allmulti level from slave */
2080 if (bond_dev->flags & IFF_ALLMULTI)
2081 dev_set_allmulti(slave_dev, -1);
2083 /* flush master's mc_list from slave */
2084 netif_addr_lock_bh(bond_dev);
2085 bond_mc_list_flush(bond_dev, slave_dev);
2086 netif_addr_unlock_bh(bond_dev);
2089 netdev_set_master(slave_dev, NULL);
2091 /* close slave before restoring its mac address */
2092 dev_close(slave_dev);
2094 if (!bond->params.fail_over_mac) {
2095 /* restore original ("permanent") mac address*/
2096 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2097 addr.sa_family = slave_dev->type;
2098 dev_set_mac_address(slave_dev, &addr);
2101 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2102 IFF_SLAVE_INACTIVE);
2106 /* re-acquire the lock before getting the next slave */
2107 write_lock_bh(&bond->lock);
2110 /* zero the mac address of the master so it will be
2111 * set by the application to the mac address of the
2114 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2116 if (list_empty(&bond->vlan_list))
2117 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2120 ": %s: Warning: clearing HW address of %s while it "
2121 "still has VLANs.\n",
2122 bond_dev->name, bond_dev->name);
2124 ": %s: When re-adding slaves, make sure the bond's "
2125 "HW address matches its VLANs'.\n",
2130 ": %s: released all slaves\n",
2134 write_unlock_bh(&bond->lock);
2140 * This function changes the active slave to slave <slave_dev>.
2141 * It returns -EINVAL in the following cases.
2142 * - <slave_dev> is not found in the list.
2143 * - There is not active slave now.
2144 * - <slave_dev> is already active.
2145 * - The link state of <slave_dev> is not BOND_LINK_UP.
2146 * - <slave_dev> is not running.
2147 * In these cases, this function does nothing.
2148 * In the other cases, current_slave pointer is changed and 0 is returned.
2150 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2152 struct bonding *bond = netdev_priv(bond_dev);
2153 struct slave *old_active = NULL;
2154 struct slave *new_active = NULL;
2157 if (!USES_PRIMARY(bond->params.mode))
2160 /* Verify that master_dev is indeed the master of slave_dev */
2161 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
2164 read_lock(&bond->lock);
2166 read_lock(&bond->curr_slave_lock);
2167 old_active = bond->curr_active_slave;
2168 read_unlock(&bond->curr_slave_lock);
2170 new_active = bond_get_slave_by_dev(bond, slave_dev);
2173 * Changing to the current active: do nothing; return success.
2175 if (new_active && (new_active == old_active)) {
2176 read_unlock(&bond->lock);
2182 (new_active->link == BOND_LINK_UP) &&
2183 IS_UP(new_active->dev)) {
2184 write_lock_bh(&bond->curr_slave_lock);
2185 bond_change_active_slave(bond, new_active);
2186 write_unlock_bh(&bond->curr_slave_lock);
2190 read_unlock(&bond->lock);
2195 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2197 struct bonding *bond = netdev_priv(bond_dev);
2199 info->bond_mode = bond->params.mode;
2200 info->miimon = bond->params.miimon;
2202 read_lock(&bond->lock);
2203 info->num_slaves = bond->slave_cnt;
2204 read_unlock(&bond->lock);
2209 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2211 struct bonding *bond = netdev_priv(bond_dev);
2212 struct slave *slave;
2213 int i, res = -ENODEV;
2215 read_lock(&bond->lock);
2217 bond_for_each_slave(bond, slave, i) {
2218 if (i == (int)info->slave_id) {
2220 strcpy(info->slave_name, slave->dev->name);
2221 info->link = slave->link;
2222 info->state = slave->state;
2223 info->link_failure_count = slave->link_failure_count;
2228 read_unlock(&bond->lock);
2233 /*-------------------------------- Monitoring -------------------------------*/
2236 static int bond_miimon_inspect(struct bonding *bond)
2238 struct slave *slave;
2239 int i, link_state, commit = 0;
2240 bool ignore_updelay;
2242 ignore_updelay = !bond->curr_active_slave ? true : false;
2244 bond_for_each_slave(bond, slave, i) {
2245 slave->new_link = BOND_LINK_NOCHANGE;
2247 link_state = bond_check_dev_link(bond, slave->dev, 0);
2249 switch (slave->link) {
2254 slave->link = BOND_LINK_FAIL;
2255 slave->delay = bond->params.downdelay;
2258 ": %s: link status down for %s"
2259 "interface %s, disabling it in %d ms.\n",
2261 (bond->params.mode ==
2262 BOND_MODE_ACTIVEBACKUP) ?
2263 ((slave->state == BOND_STATE_ACTIVE) ?
2264 "active " : "backup ") : "",
2266 bond->params.downdelay * bond->params.miimon);
2269 case BOND_LINK_FAIL:
2272 * recovered before downdelay expired
2274 slave->link = BOND_LINK_UP;
2275 slave->jiffies = jiffies;
2277 ": %s: link status up again after %d "
2278 "ms for interface %s.\n",
2280 (bond->params.downdelay - slave->delay) *
2281 bond->params.miimon,
2286 if (slave->delay <= 0) {
2287 slave->new_link = BOND_LINK_DOWN;
2295 case BOND_LINK_DOWN:
2299 slave->link = BOND_LINK_BACK;
2300 slave->delay = bond->params.updelay;
2304 ": %s: link status up for "
2305 "interface %s, enabling it in %d ms.\n",
2306 bond->dev->name, slave->dev->name,
2307 ignore_updelay ? 0 :
2308 bond->params.updelay *
2309 bond->params.miimon);
2312 case BOND_LINK_BACK:
2314 slave->link = BOND_LINK_DOWN;
2316 ": %s: link status down again after %d "
2317 "ms for interface %s.\n",
2319 (bond->params.updelay - slave->delay) *
2320 bond->params.miimon,
2329 if (slave->delay <= 0) {
2330 slave->new_link = BOND_LINK_UP;
2332 ignore_updelay = false;
2344 static void bond_miimon_commit(struct bonding *bond)
2346 struct slave *slave;
2349 bond_for_each_slave(bond, slave, i) {
2350 switch (slave->new_link) {
2351 case BOND_LINK_NOCHANGE:
2355 slave->link = BOND_LINK_UP;
2356 slave->jiffies = jiffies;
2358 if (bond->params.mode == BOND_MODE_8023AD) {
2359 /* prevent it from being the active one */
2360 slave->state = BOND_STATE_BACKUP;
2361 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2362 /* make it immediately active */
2363 slave->state = BOND_STATE_ACTIVE;
2364 } else if (slave != bond->primary_slave) {
2365 /* prevent it from being the active one */
2366 slave->state = BOND_STATE_BACKUP;
2370 ": %s: link status definitely "
2371 "up for interface %s.\n",
2372 bond->dev->name, slave->dev->name);
2374 /* notify ad that the link status has changed */
2375 if (bond->params.mode == BOND_MODE_8023AD)
2376 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2378 if (bond_is_lb(bond))
2379 bond_alb_handle_link_change(bond, slave,
2382 if (!bond->curr_active_slave ||
2383 (slave == bond->primary_slave))
2388 case BOND_LINK_DOWN:
2389 if (slave->link_failure_count < UINT_MAX)
2390 slave->link_failure_count++;
2392 slave->link = BOND_LINK_DOWN;
2394 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2395 bond->params.mode == BOND_MODE_8023AD)
2396 bond_set_slave_inactive_flags(slave);
2399 ": %s: link status definitely down for "
2400 "interface %s, disabling it\n",
2401 bond->dev->name, slave->dev->name);
2403 if (bond->params.mode == BOND_MODE_8023AD)
2404 bond_3ad_handle_link_change(slave,
2407 if (bond_is_lb(bond))
2408 bond_alb_handle_link_change(bond, slave,
2411 if (slave == bond->curr_active_slave)
2418 ": %s: invalid new link %d on slave %s\n",
2419 bond->dev->name, slave->new_link,
2421 slave->new_link = BOND_LINK_NOCHANGE;
2428 write_lock_bh(&bond->curr_slave_lock);
2429 bond_select_active_slave(bond);
2430 write_unlock_bh(&bond->curr_slave_lock);
2433 bond_set_carrier(bond);
2439 * Really a wrapper that splits the mii monitor into two phases: an
2440 * inspection, then (if inspection indicates something needs to be done)
2441 * an acquisition of appropriate locks followed by a commit phase to
2442 * implement whatever link state changes are indicated.
2444 void bond_mii_monitor(struct work_struct *work)
2446 struct bonding *bond = container_of(work, struct bonding,
2449 read_lock(&bond->lock);
2450 if (bond->kill_timers)
2453 if (bond->slave_cnt == 0)
2456 if (bond->send_grat_arp) {
2457 read_lock(&bond->curr_slave_lock);
2458 bond_send_gratuitous_arp(bond);
2459 read_unlock(&bond->curr_slave_lock);
2462 if (bond->send_unsol_na) {
2463 read_lock(&bond->curr_slave_lock);
2464 bond_send_unsolicited_na(bond);
2465 read_unlock(&bond->curr_slave_lock);
2468 if (bond_miimon_inspect(bond)) {
2469 read_unlock(&bond->lock);
2471 read_lock(&bond->lock);
2473 bond_miimon_commit(bond);
2475 read_unlock(&bond->lock);
2476 rtnl_unlock(); /* might sleep, hold no other locks */
2477 read_lock(&bond->lock);
2481 if (bond->params.miimon)
2482 queue_delayed_work(bond->wq, &bond->mii_work,
2483 msecs_to_jiffies(bond->params.miimon));
2485 read_unlock(&bond->lock);
2488 static __be32 bond_glean_dev_ip(struct net_device *dev)
2490 struct in_device *idev;
2491 struct in_ifaddr *ifa;
2498 idev = __in_dev_get_rcu(dev);
2502 ifa = idev->ifa_list;
2506 addr = ifa->ifa_local;
2512 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2514 struct vlan_entry *vlan;
2516 if (ip == bond->master_ip)
2519 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2520 if (ip == vlan->vlan_ip)
2528 * We go to the (large) trouble of VLAN tagging ARP frames because
2529 * switches in VLAN mode (especially if ports are configured as
2530 * "native" to a VLAN) might not pass non-tagged frames.
2532 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2534 struct sk_buff *skb;
2536 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2537 slave_dev->name, dest_ip, src_ip, vlan_id);
2539 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2540 NULL, slave_dev->dev_addr, NULL);
2543 pr_err(DRV_NAME ": ARP packet allocation failed\n");
2547 skb = vlan_put_tag(skb, vlan_id);
2549 pr_err(DRV_NAME ": failed to insert VLAN tag\n");
2557 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2560 __be32 *targets = bond->params.arp_targets;
2561 struct vlan_entry *vlan;
2562 struct net_device *vlan_dev;
2566 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2569 pr_debug("basa: target %x\n", targets[i]);
2570 if (list_empty(&bond->vlan_list)) {
2571 pr_debug("basa: empty vlan: arp_send\n");
2572 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2573 bond->master_ip, 0);
2578 * If VLANs are configured, we do a route lookup to
2579 * determine which VLAN interface would be used, so we
2580 * can tag the ARP with the proper VLAN tag.
2582 memset(&fl, 0, sizeof(fl));
2583 fl.fl4_dst = targets[i];
2584 fl.fl4_tos = RTO_ONLINK;
2586 rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
2588 if (net_ratelimit()) {
2590 ": %s: no route to arp_ip_target %pI4\n",
2591 bond->dev->name, &fl.fl4_dst);
2597 * This target is not on a VLAN
2599 if (rt->u.dst.dev == bond->dev) {
2601 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2602 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2603 bond->master_ip, 0);
2608 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2609 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2610 if (vlan_dev == rt->u.dst.dev) {
2611 vlan_id = vlan->vlan_id;
2612 pr_debug("basa: vlan match on %s %d\n",
2613 vlan_dev->name, vlan_id);
2620 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2621 vlan->vlan_ip, vlan_id);
2625 if (net_ratelimit()) {
2627 ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2628 bond->dev->name, &fl.fl4_dst,
2629 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2636 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2637 * for each VLAN above us.
2639 * Caller must hold curr_slave_lock for read or better
2641 static void bond_send_gratuitous_arp(struct bonding *bond)
2643 struct slave *slave = bond->curr_active_slave;
2644 struct vlan_entry *vlan;
2645 struct net_device *vlan_dev;
2647 pr_debug("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2648 slave ? slave->dev->name : "NULL");
2650 if (!slave || !bond->send_grat_arp ||
2651 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
2654 bond->send_grat_arp--;
2656 if (bond->master_ip) {
2657 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2658 bond->master_ip, 0);
2661 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2662 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2663 if (vlan->vlan_ip) {
2664 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2665 vlan->vlan_ip, vlan->vlan_id);
2670 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2673 __be32 *targets = bond->params.arp_targets;
2675 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2676 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2677 &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip));
2678 if (sip == targets[i]) {
2679 if (bond_has_this_ip(bond, tip))
2680 slave->last_arp_rx = jiffies;
2686 static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2689 struct slave *slave;
2690 struct bonding *bond;
2691 unsigned char *arp_ptr;
2694 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2697 bond = netdev_priv(dev);
2698 read_lock(&bond->lock);
2700 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2701 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2702 orig_dev ? orig_dev->name : "NULL");
2704 slave = bond_get_slave_by_dev(bond, orig_dev);
2705 if (!slave || !slave_do_arp_validate(bond, slave))
2708 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
2712 if (arp->ar_hln != dev->addr_len ||
2713 skb->pkt_type == PACKET_OTHERHOST ||
2714 skb->pkt_type == PACKET_LOOPBACK ||
2715 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2716 arp->ar_pro != htons(ETH_P_IP) ||
2720 arp_ptr = (unsigned char *)(arp + 1);
2721 arp_ptr += dev->addr_len;
2722 memcpy(&sip, arp_ptr, 4);
2723 arp_ptr += 4 + dev->addr_len;
2724 memcpy(&tip, arp_ptr, 4);
2726 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2727 bond->dev->name, slave->dev->name, slave->state,
2728 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2732 * Backup slaves won't see the ARP reply, but do come through
2733 * here for each ARP probe (so we swap the sip/tip to validate
2734 * the probe). In a "redundant switch, common router" type of
2735 * configuration, the ARP probe will (hopefully) travel from
2736 * the active, through one switch, the router, then the other
2737 * switch before reaching the backup.
2739 if (slave->state == BOND_STATE_ACTIVE)
2740 bond_validate_arp(bond, slave, sip, tip);
2742 bond_validate_arp(bond, slave, tip, sip);
2745 read_unlock(&bond->lock);
2748 return NET_RX_SUCCESS;
2752 * this function is called regularly to monitor each slave's link
2753 * ensuring that traffic is being sent and received when arp monitoring
2754 * is used in load-balancing mode. if the adapter has been dormant, then an
2755 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2756 * arp monitoring in active backup mode.
2758 void bond_loadbalance_arp_mon(struct work_struct *work)
2760 struct bonding *bond = container_of(work, struct bonding,
2762 struct slave *slave, *oldcurrent;
2763 int do_failover = 0;
2767 read_lock(&bond->lock);
2769 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2771 if (bond->kill_timers)
2774 if (bond->slave_cnt == 0)
2777 read_lock(&bond->curr_slave_lock);
2778 oldcurrent = bond->curr_active_slave;
2779 read_unlock(&bond->curr_slave_lock);
2781 /* see if any of the previous devices are up now (i.e. they have
2782 * xmt and rcv traffic). the curr_active_slave does not come into
2783 * the picture unless it is null. also, slave->jiffies is not needed
2784 * here because we send an arp on each slave and give a slave as
2785 * long as it needs to get the tx/rx within the delta.
2786 * TODO: what about up/down delay in arp mode? it wasn't here before
2789 bond_for_each_slave(bond, slave, i) {
2790 if (slave->link != BOND_LINK_UP) {
2791 if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) &&
2792 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
2794 slave->link = BOND_LINK_UP;
2795 slave->state = BOND_STATE_ACTIVE;
2797 /* primary_slave has no meaning in round-robin
2798 * mode. the window of a slave being up and
2799 * curr_active_slave being null after enslaving
2804 ": %s: link status definitely "
2805 "up for interface %s, ",
2811 ": %s: interface %s is now up\n",
2817 /* slave->link == BOND_LINK_UP */
2819 /* not all switches will respond to an arp request
2820 * when the source ip is 0, so don't take the link down
2821 * if we don't know our ip yet
2823 if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) ||
2824 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
2826 slave->link = BOND_LINK_DOWN;
2827 slave->state = BOND_STATE_BACKUP;
2829 if (slave->link_failure_count < UINT_MAX)
2830 slave->link_failure_count++;
2833 ": %s: interface %s is now down.\n",
2837 if (slave == oldcurrent)
2842 /* note: if switch is in round-robin mode, all links
2843 * must tx arp to ensure all links rx an arp - otherwise
2844 * links may oscillate or not come up at all; if switch is
2845 * in something like xor mode, there is nothing we can
2846 * do - all replies will be rx'ed on same link causing slaves
2847 * to be unstable during low/no traffic periods
2849 if (IS_UP(slave->dev))
2850 bond_arp_send_all(bond, slave);
2854 write_lock_bh(&bond->curr_slave_lock);
2856 bond_select_active_slave(bond);
2858 write_unlock_bh(&bond->curr_slave_lock);
2862 if (bond->params.arp_interval)
2863 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2865 read_unlock(&bond->lock);
2869 * Called to inspect slaves for active-backup mode ARP monitor link state
2870 * changes. Sets new_link in slaves to specify what action should take
2871 * place for the slave. Returns 0 if no changes are found, >0 if changes
2872 * to link states must be committed.
2874 * Called with bond->lock held for read.
2876 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2878 struct slave *slave;
2881 bond_for_each_slave(bond, slave, i) {
2882 slave->new_link = BOND_LINK_NOCHANGE;
2884 if (slave->link != BOND_LINK_UP) {
2885 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2887 slave->new_link = BOND_LINK_UP;
2895 * Give slaves 2*delta after being enslaved or made
2896 * active. This avoids bouncing, as the last receive
2897 * times need a full ARP monitor cycle to be updated.
2899 if (!time_after_eq(jiffies, slave->jiffies +
2900 2 * delta_in_ticks))
2904 * Backup slave is down if:
2905 * - No current_arp_slave AND
2906 * - more than 3*delta since last receive AND
2907 * - the bond has an IP address
2909 * Note: a non-null current_arp_slave indicates
2910 * the curr_active_slave went down and we are
2911 * searching for a new one; under this condition
2912 * we only take the curr_active_slave down - this
2913 * gives each slave a chance to tx/rx traffic
2914 * before being taken out
2916 if (slave->state == BOND_STATE_BACKUP &&
2917 !bond->current_arp_slave &&
2918 time_after(jiffies, slave_last_rx(bond, slave) +
2919 3 * delta_in_ticks)) {
2920 slave->new_link = BOND_LINK_DOWN;
2925 * Active slave is down if:
2926 * - more than 2*delta since transmitting OR
2927 * - (more than 2*delta since receive AND
2928 * the bond has an IP address)
2930 if ((slave->state == BOND_STATE_ACTIVE) &&
2931 (time_after_eq(jiffies, dev_trans_start(slave->dev) +
2932 2 * delta_in_ticks) ||
2933 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2934 + 2 * delta_in_ticks)))) {
2935 slave->new_link = BOND_LINK_DOWN;
2944 * Called to commit link state changes noted by inspection step of
2945 * active-backup mode ARP monitor.
2947 * Called with RTNL and bond->lock for read.
2949 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2951 struct slave *slave;
2954 bond_for_each_slave(bond, slave, i) {
2955 switch (slave->new_link) {
2956 case BOND_LINK_NOCHANGE:
2960 if ((!bond->curr_active_slave &&
2961 time_before_eq(jiffies,
2962 dev_trans_start(slave->dev) +
2964 bond->curr_active_slave != slave) {
2965 slave->link = BOND_LINK_UP;
2966 bond->current_arp_slave = NULL;
2969 ": %s: link status definitely "
2970 "up for interface %s.\n",
2971 bond->dev->name, slave->dev->name);
2973 if (!bond->curr_active_slave ||
2974 (slave == bond->primary_slave))
2981 case BOND_LINK_DOWN:
2982 if (slave->link_failure_count < UINT_MAX)
2983 slave->link_failure_count++;
2985 slave->link = BOND_LINK_DOWN;
2986 bond_set_slave_inactive_flags(slave);
2989 ": %s: link status definitely down for "
2990 "interface %s, disabling it\n",
2991 bond->dev->name, slave->dev->name);
2993 if (slave == bond->curr_active_slave) {
2994 bond->current_arp_slave = NULL;
3002 ": %s: impossible: new_link %d on slave %s\n",
3003 bond->dev->name, slave->new_link,
3010 write_lock_bh(&bond->curr_slave_lock);
3011 bond_select_active_slave(bond);
3012 write_unlock_bh(&bond->curr_slave_lock);
3015 bond_set_carrier(bond);
3019 * Send ARP probes for active-backup mode ARP monitor.
3021 * Called with bond->lock held for read.
3023 static void bond_ab_arp_probe(struct bonding *bond)
3025 struct slave *slave;
3028 read_lock(&bond->curr_slave_lock);
3030 if (bond->current_arp_slave && bond->curr_active_slave)
3031 pr_info(DRV_NAME "PROBE: c_arp %s && cas %s BAD\n",
3032 bond->current_arp_slave->dev->name,
3033 bond->curr_active_slave->dev->name);
3035 if (bond->curr_active_slave) {
3036 bond_arp_send_all(bond, bond->curr_active_slave);
3037 read_unlock(&bond->curr_slave_lock);
3041 read_unlock(&bond->curr_slave_lock);
3043 /* if we don't have a curr_active_slave, search for the next available
3044 * backup slave from the current_arp_slave and make it the candidate
3045 * for becoming the curr_active_slave
3048 if (!bond->current_arp_slave) {
3049 bond->current_arp_slave = bond->first_slave;
3050 if (!bond->current_arp_slave)
3054 bond_set_slave_inactive_flags(bond->current_arp_slave);
3056 /* search for next candidate */
3057 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3058 if (IS_UP(slave->dev)) {
3059 slave->link = BOND_LINK_BACK;
3060 bond_set_slave_active_flags(slave);
3061 bond_arp_send_all(bond, slave);
3062 slave->jiffies = jiffies;
3063 bond->current_arp_slave = slave;
3067 /* if the link state is up at this point, we
3068 * mark it down - this can happen if we have
3069 * simultaneous link failures and
3070 * reselect_active_interface doesn't make this
3071 * one the current slave so it is still marked
3072 * up when it is actually down
3074 if (slave->link == BOND_LINK_UP) {
3075 slave->link = BOND_LINK_DOWN;
3076 if (slave->link_failure_count < UINT_MAX)
3077 slave->link_failure_count++;
3079 bond_set_slave_inactive_flags(slave);
3082 ": %s: backup interface %s is now down.\n",
3083 bond->dev->name, slave->dev->name);
3088 void bond_activebackup_arp_mon(struct work_struct *work)
3090 struct bonding *bond = container_of(work, struct bonding,
3094 read_lock(&bond->lock);
3096 if (bond->kill_timers)
3099 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3101 if (bond->slave_cnt == 0)
3104 if (bond->send_grat_arp) {
3105 read_lock(&bond->curr_slave_lock);
3106 bond_send_gratuitous_arp(bond);
3107 read_unlock(&bond->curr_slave_lock);
3110 if (bond->send_unsol_na) {
3111 read_lock(&bond->curr_slave_lock);
3112 bond_send_unsolicited_na(bond);
3113 read_unlock(&bond->curr_slave_lock);
3116 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3117 read_unlock(&bond->lock);
3119 read_lock(&bond->lock);
3121 bond_ab_arp_commit(bond, delta_in_ticks);
3123 read_unlock(&bond->lock);
3125 read_lock(&bond->lock);
3128 bond_ab_arp_probe(bond);
3131 if (bond->params.arp_interval)
3132 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3134 read_unlock(&bond->lock);
3137 /*------------------------------ proc/seq_file-------------------------------*/
3139 #ifdef CONFIG_PROC_FS
3141 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3142 __acquires(&dev_base_lock)
3143 __acquires(&bond->lock)
3145 struct bonding *bond = seq->private;
3147 struct slave *slave;
3150 /* make sure the bond won't be taken away */
3151 read_lock(&dev_base_lock);
3152 read_lock(&bond->lock);
3155 return SEQ_START_TOKEN;
3157 bond_for_each_slave(bond, slave, i) {
3165 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3167 struct bonding *bond = seq->private;
3168 struct slave *slave = v;
3171 if (v == SEQ_START_TOKEN)
3172 return bond->first_slave;
3174 slave = slave->next;
3176 return (slave == bond->first_slave) ? NULL : slave;
3179 static void bond_info_seq_stop(struct seq_file *seq, void *v)
3180 __releases(&bond->lock)
3181 __releases(&dev_base_lock)
3183 struct bonding *bond = seq->private;
3185 read_unlock(&bond->lock);
3186 read_unlock(&dev_base_lock);
3189 static void bond_info_show_master(struct seq_file *seq)
3191 struct bonding *bond = seq->private;
3195 read_lock(&bond->curr_slave_lock);
3196 curr = bond->curr_active_slave;
3197 read_unlock(&bond->curr_slave_lock);
3199 seq_printf(seq, "Bonding Mode: %s",
3200 bond_mode_name(bond->params.mode));
3202 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3203 bond->params.fail_over_mac)
3204 seq_printf(seq, " (fail_over_mac %s)",
3205 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
3207 seq_printf(seq, "\n");
3209 if (bond->params.mode == BOND_MODE_XOR ||
3210 bond->params.mode == BOND_MODE_8023AD) {
3211 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3212 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3213 bond->params.xmit_policy);
3216 if (USES_PRIMARY(bond->params.mode)) {
3217 seq_printf(seq, "Primary Slave: %s",
3218 (bond->primary_slave) ?
3219 bond->primary_slave->dev->name : "None");
3220 if (bond->primary_slave)
3221 seq_printf(seq, " (primary_reselect %s)",
3222 pri_reselect_tbl[bond->params.primary_reselect].modename);
3224 seq_printf(seq, "\nCurrently Active Slave: %s\n",
3225 (curr) ? curr->dev->name : "None");
3228 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3230 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3231 seq_printf(seq, "Up Delay (ms): %d\n",
3232 bond->params.updelay * bond->params.miimon);
3233 seq_printf(seq, "Down Delay (ms): %d\n",
3234 bond->params.downdelay * bond->params.miimon);
3237 /* ARP information */
3238 if (bond->params.arp_interval > 0) {
3240 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3241 bond->params.arp_interval);
3243 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3245 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
3246 if (!bond->params.arp_targets[i])
3249 seq_printf(seq, ",");
3250 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
3253 seq_printf(seq, "\n");
3256 if (bond->params.mode == BOND_MODE_8023AD) {
3257 struct ad_info ad_info;
3259 seq_puts(seq, "\n802.3ad info\n");
3260 seq_printf(seq, "LACP rate: %s\n",
3261 (bond->params.lacp_fast) ? "fast" : "slow");
3262 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3263 ad_select_tbl[bond->params.ad_select].modename);
3265 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3266 seq_printf(seq, "bond %s has no active aggregator\n",
3269 seq_printf(seq, "Active Aggregator Info:\n");
3271 seq_printf(seq, "\tAggregator ID: %d\n",
3272 ad_info.aggregator_id);
3273 seq_printf(seq, "\tNumber of ports: %d\n",
3275 seq_printf(seq, "\tActor Key: %d\n",
3277 seq_printf(seq, "\tPartner Key: %d\n",
3278 ad_info.partner_key);
3279 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3280 ad_info.partner_system);
3285 static void bond_info_show_slave(struct seq_file *seq,
3286 const struct slave *slave)
3288 struct bonding *bond = seq->private;
3290 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3291 seq_printf(seq, "MII Status: %s\n",
3292 (slave->link == BOND_LINK_UP) ? "up" : "down");
3293 seq_printf(seq, "Link Failure Count: %u\n",
3294 slave->link_failure_count);
3296 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
3298 if (bond->params.mode == BOND_MODE_8023AD) {
3299 const struct aggregator *agg
3300 = SLAVE_AD_INFO(slave).port.aggregator;
3303 seq_printf(seq, "Aggregator ID: %d\n",
3304 agg->aggregator_identifier);
3306 seq_puts(seq, "Aggregator ID: N/A\n");
3310 static int bond_info_seq_show(struct seq_file *seq, void *v)
3312 if (v == SEQ_START_TOKEN) {
3313 seq_printf(seq, "%s\n", version);
3314 bond_info_show_master(seq);
3316 bond_info_show_slave(seq, v);
3321 static const struct seq_operations bond_info_seq_ops = {
3322 .start = bond_info_seq_start,
3323 .next = bond_info_seq_next,
3324 .stop = bond_info_seq_stop,
3325 .show = bond_info_seq_show,
3328 static int bond_info_open(struct inode *inode, struct file *file)
3330 struct seq_file *seq;
3331 struct proc_dir_entry *proc;
3334 res = seq_open(file, &bond_info_seq_ops);
3336 /* recover the pointer buried in proc_dir_entry data */
3337 seq = file->private_data;
3339 seq->private = proc->data;
3345 static const struct file_operations bond_info_fops = {
3346 .owner = THIS_MODULE,
3347 .open = bond_info_open,
3349 .llseek = seq_lseek,
3350 .release = seq_release,
3353 static void bond_create_proc_entry(struct bonding *bond)
3355 struct net_device *bond_dev = bond->dev;
3356 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3359 bond->proc_entry = proc_create_data(bond_dev->name,
3360 S_IRUGO, bn->proc_dir,
3361 &bond_info_fops, bond);
3362 if (bond->proc_entry == NULL)
3364 ": Warning: Cannot create /proc/net/%s/%s\n",
3365 DRV_NAME, bond_dev->name);
3367 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3371 static void bond_remove_proc_entry(struct bonding *bond)
3373 struct net_device *bond_dev = bond->dev;
3374 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3376 if (bn->proc_dir && bond->proc_entry) {
3377 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
3378 memset(bond->proc_file_name, 0, IFNAMSIZ);
3379 bond->proc_entry = NULL;
3383 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3384 * Caller must hold rtnl_lock.
3386 static void bond_create_proc_dir(struct bond_net *bn)
3388 if (!bn->proc_dir) {
3389 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
3392 ": Warning: cannot create /proc/net/%s\n",
3397 /* Destroy the bonding directory under /proc/net, if empty.
3398 * Caller must hold rtnl_lock.
3400 static void bond_destroy_proc_dir(struct bond_net *bn)
3403 remove_proc_entry(DRV_NAME, bn->net->proc_net);
3404 bn->proc_dir = NULL;
3408 #else /* !CONFIG_PROC_FS */
3410 static void bond_create_proc_entry(struct bonding *bond)
3414 static void bond_remove_proc_entry(struct bonding *bond)
3418 static void bond_create_proc_dir(struct bond_net *bn)
3422 static void bond_destroy_proc_dir(struct bond_net *bn)
3426 #endif /* CONFIG_PROC_FS */
3429 /*-------------------------- netdev event handling --------------------------*/
3432 * Change device name
3434 static int bond_event_changename(struct bonding *bond)
3436 bond_remove_proc_entry(bond);
3437 bond_create_proc_entry(bond);
3442 static int bond_master_netdev_event(unsigned long event,
3443 struct net_device *bond_dev)
3445 struct bonding *event_bond = netdev_priv(bond_dev);
3448 case NETDEV_CHANGENAME:
3449 return bond_event_changename(event_bond);
3457 static int bond_slave_netdev_event(unsigned long event,
3458 struct net_device *slave_dev)
3460 struct net_device *bond_dev = slave_dev->master;
3461 struct bonding *bond = netdev_priv(bond_dev);
3464 case NETDEV_UNREGISTER:
3466 if (bond->setup_by_slave)
3467 bond_release_and_destroy(bond_dev, slave_dev);
3469 bond_release(bond_dev, slave_dev);
3473 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3474 struct slave *slave;
3476 slave = bond_get_slave_by_dev(bond, slave_dev);
3478 u16 old_speed = slave->speed;
3479 u16 old_duplex = slave->duplex;
3481 bond_update_speed_duplex(slave);
3483 if (bond_is_lb(bond))
3486 if (old_speed != slave->speed)
3487 bond_3ad_adapter_speed_changed(slave);
3488 if (old_duplex != slave->duplex)
3489 bond_3ad_adapter_duplex_changed(slave);
3496 * ... Or is it this?
3499 case NETDEV_CHANGEMTU:
3501 * TODO: Should slaves be allowed to
3502 * independently alter their MTU? For
3503 * an active-backup bond, slaves need
3504 * not be the same type of device, so
3505 * MTUs may vary. For other modes,
3506 * slaves arguably should have the
3507 * same MTUs. To do this, we'd need to
3508 * take over the slave's change_mtu
3509 * function for the duration of their
3513 case NETDEV_CHANGENAME:
3515 * TODO: handle changing the primary's name
3518 case NETDEV_FEAT_CHANGE:
3519 bond_compute_features(bond);
3529 * bond_netdev_event: handle netdev notifier chain events.
3531 * This function receives events for the netdev chain. The caller (an
3532 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3533 * locks for us to safely manipulate the slave devices (RTNL lock,
3536 static int bond_netdev_event(struct notifier_block *this,
3537 unsigned long event, void *ptr)
3539 struct net_device *event_dev = (struct net_device *)ptr;
3541 pr_debug("event_dev: %s, event: %lx\n",
3542 (event_dev ? event_dev->name : "None"),
3545 if (!(event_dev->priv_flags & IFF_BONDING))
3548 if (event_dev->flags & IFF_MASTER) {
3549 pr_debug("IFF_MASTER\n");
3550 return bond_master_netdev_event(event, event_dev);
3553 if (event_dev->flags & IFF_SLAVE) {
3554 pr_debug("IFF_SLAVE\n");
3555 return bond_slave_netdev_event(event, event_dev);
3562 * bond_inetaddr_event: handle inetaddr notifier chain events.
3564 * We keep track of device IPs primarily to use as source addresses in
3565 * ARP monitor probes (rather than spewing out broadcasts all the time).
3567 * We track one IP for the main device (if it has one), plus one per VLAN.
3569 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3571 struct in_ifaddr *ifa = ptr;
3572 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3573 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
3574 struct bonding *bond;
3575 struct vlan_entry *vlan;
3577 list_for_each_entry(bond, &bn->dev_list, bond_list) {
3578 if (bond->dev == event_dev) {
3581 bond->master_ip = ifa->ifa_local;
3584 bond->master_ip = bond_glean_dev_ip(bond->dev);
3591 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3592 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
3593 if (vlan_dev == event_dev) {
3596 vlan->vlan_ip = ifa->ifa_local;
3600 bond_glean_dev_ip(vlan_dev);
3611 static struct notifier_block bond_netdev_notifier = {
3612 .notifier_call = bond_netdev_event,
3615 static struct notifier_block bond_inetaddr_notifier = {
3616 .notifier_call = bond_inetaddr_event,
3619 /*-------------------------- Packet type handling ---------------------------*/
3621 /* register to receive lacpdus on a bond */
3622 static void bond_register_lacpdu(struct bonding *bond)
3624 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3626 /* initialize packet type */
3627 pk_type->type = PKT_TYPE_LACPDU;
3628 pk_type->dev = bond->dev;
3629 pk_type->func = bond_3ad_lacpdu_recv;
3631 dev_add_pack(pk_type);
3634 /* unregister to receive lacpdus on a bond */
3635 static void bond_unregister_lacpdu(struct bonding *bond)
3637 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3640 void bond_register_arp(struct bonding *bond)
3642 struct packet_type *pt = &bond->arp_mon_pt;
3647 pt->type = htons(ETH_P_ARP);
3648 pt->dev = bond->dev;
3649 pt->func = bond_arp_rcv;
3653 void bond_unregister_arp(struct bonding *bond)
3655 struct packet_type *pt = &bond->arp_mon_pt;
3657 dev_remove_pack(pt);
3661 /*---------------------------- Hashing Policies -----------------------------*/
3664 * Hash for the output device based upon layer 2 and layer 3 data. If
3665 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3667 static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
3669 struct ethhdr *data = (struct ethhdr *)skb->data;
3670 struct iphdr *iph = ip_hdr(skb);
3672 if (skb->protocol == htons(ETH_P_IP)) {
3673 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3674 (data->h_dest[5] ^ data->h_source[5])) % count;
3677 return (data->h_dest[5] ^ data->h_source[5]) % count;
3681 * Hash for the output device based upon layer 3 and layer 4 data. If
3682 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3683 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3685 static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
3687 struct ethhdr *data = (struct ethhdr *)skb->data;
3688 struct iphdr *iph = ip_hdr(skb);
3689 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3692 if (skb->protocol == htons(ETH_P_IP)) {
3693 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
3694 (iph->protocol == IPPROTO_TCP ||
3695 iph->protocol == IPPROTO_UDP)) {
3696 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3698 return (layer4_xor ^
3699 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3703 return (data->h_dest[5] ^ data->h_source[5]) % count;
3707 * Hash for the output device based upon layer 2 data
3709 static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
3711 struct ethhdr *data = (struct ethhdr *)skb->data;
3713 return (data->h_dest[5] ^ data->h_source[5]) % count;
3716 /*-------------------------- Device entry points ----------------------------*/
3718 static int bond_open(struct net_device *bond_dev)
3720 struct bonding *bond = netdev_priv(bond_dev);
3722 bond->kill_timers = 0;
3724 if (bond_is_lb(bond)) {
3725 /* bond_alb_initialize must be called before the timer
3728 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3729 /* something went wrong - fail the open operation */
3733 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3734 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3737 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3738 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3739 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3742 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3743 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3744 INIT_DELAYED_WORK(&bond->arp_work,
3745 bond_activebackup_arp_mon);
3747 INIT_DELAYED_WORK(&bond->arp_work,
3748 bond_loadbalance_arp_mon);
3750 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3751 if (bond->params.arp_validate)
3752 bond_register_arp(bond);
3755 if (bond->params.mode == BOND_MODE_8023AD) {
3756 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3757 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3758 /* register to receive LACPDUs */
3759 bond_register_lacpdu(bond);
3760 bond_3ad_initiate_agg_selection(bond, 1);
3766 static int bond_close(struct net_device *bond_dev)
3768 struct bonding *bond = netdev_priv(bond_dev);
3770 if (bond->params.mode == BOND_MODE_8023AD) {
3771 /* Unregister the receive of LACPDUs */
3772 bond_unregister_lacpdu(bond);
3775 if (bond->params.arp_validate)
3776 bond_unregister_arp(bond);
3778 write_lock_bh(&bond->lock);
3780 bond->send_grat_arp = 0;
3781 bond->send_unsol_na = 0;
3783 /* signal timers not to re-arm */
3784 bond->kill_timers = 1;
3786 write_unlock_bh(&bond->lock);
3788 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3789 cancel_delayed_work(&bond->mii_work);
3792 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3793 cancel_delayed_work(&bond->arp_work);
3796 switch (bond->params.mode) {
3797 case BOND_MODE_8023AD:
3798 cancel_delayed_work(&bond->ad_work);
3802 cancel_delayed_work(&bond->alb_work);
3809 if (bond_is_lb(bond)) {
3810 /* Must be called only after all
3811 * slaves have been released
3813 bond_alb_deinitialize(bond);
3819 static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3821 struct bonding *bond = netdev_priv(bond_dev);
3822 struct net_device_stats *stats = &bond->stats;
3823 struct net_device_stats local_stats;
3824 struct slave *slave;
3827 memset(&local_stats, 0, sizeof(struct net_device_stats));
3829 read_lock_bh(&bond->lock);
3831 bond_for_each_slave(bond, slave, i) {
3832 const struct net_device_stats *sstats = dev_get_stats(slave->dev);
3834 local_stats.rx_packets += sstats->rx_packets;
3835 local_stats.rx_bytes += sstats->rx_bytes;
3836 local_stats.rx_errors += sstats->rx_errors;
3837 local_stats.rx_dropped += sstats->rx_dropped;
3839 local_stats.tx_packets += sstats->tx_packets;
3840 local_stats.tx_bytes += sstats->tx_bytes;
3841 local_stats.tx_errors += sstats->tx_errors;
3842 local_stats.tx_dropped += sstats->tx_dropped;
3844 local_stats.multicast += sstats->multicast;
3845 local_stats.collisions += sstats->collisions;
3847 local_stats.rx_length_errors += sstats->rx_length_errors;
3848 local_stats.rx_over_errors += sstats->rx_over_errors;
3849 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3850 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3851 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3852 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3854 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3855 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3856 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3857 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3858 local_stats.tx_window_errors += sstats->tx_window_errors;
3861 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
3863 read_unlock_bh(&bond->lock);
3868 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3870 struct net_device *slave_dev = NULL;
3871 struct ifbond k_binfo;
3872 struct ifbond __user *u_binfo = NULL;
3873 struct ifslave k_sinfo;
3874 struct ifslave __user *u_sinfo = NULL;
3875 struct mii_ioctl_data *mii = NULL;
3878 pr_debug("bond_ioctl: master=%s, cmd=%d\n",
3879 bond_dev->name, cmd);
3891 * We do this again just in case we were called by SIOCGMIIREG
3892 * instead of SIOCGMIIPHY.
3899 if (mii->reg_num == 1) {
3900 struct bonding *bond = netdev_priv(bond_dev);
3902 read_lock(&bond->lock);
3903 read_lock(&bond->curr_slave_lock);
3904 if (netif_carrier_ok(bond->dev))
3905 mii->val_out = BMSR_LSTATUS;
3907 read_unlock(&bond->curr_slave_lock);
3908 read_unlock(&bond->lock);
3912 case BOND_INFO_QUERY_OLD:
3913 case SIOCBONDINFOQUERY:
3914 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3916 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3919 res = bond_info_query(bond_dev, &k_binfo);
3921 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3925 case BOND_SLAVE_INFO_QUERY_OLD:
3926 case SIOCBONDSLAVEINFOQUERY:
3927 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3929 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3932 res = bond_slave_info_query(bond_dev, &k_sinfo);
3934 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3943 if (!capable(CAP_NET_ADMIN))
3946 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
3948 pr_debug("slave_dev=%p: \n", slave_dev);
3953 pr_debug("slave_dev->name=%s: \n", slave_dev->name);
3955 case BOND_ENSLAVE_OLD:
3956 case SIOCBONDENSLAVE:
3957 res = bond_enslave(bond_dev, slave_dev);
3959 case BOND_RELEASE_OLD:
3960 case SIOCBONDRELEASE:
3961 res = bond_release(bond_dev, slave_dev);
3963 case BOND_SETHWADDR_OLD:
3964 case SIOCBONDSETHWADDR:
3965 res = bond_sethwaddr(bond_dev, slave_dev);
3967 case BOND_CHANGE_ACTIVE_OLD:
3968 case SIOCBONDCHANGEACTIVE:
3969 res = bond_ioctl_change_active(bond_dev, slave_dev);
3981 static void bond_set_multicast_list(struct net_device *bond_dev)
3983 struct bonding *bond = netdev_priv(bond_dev);
3984 struct dev_mc_list *dmi;
3987 * Do promisc before checking multicast_mode
3989 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
3991 * FIXME: Need to handle the error when one of the multi-slaves
3994 bond_set_promiscuity(bond, 1);
3997 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
3998 bond_set_promiscuity(bond, -1);
4001 /* set allmulti flag to slaves */
4002 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
4004 * FIXME: Need to handle the error when one of the multi-slaves
4007 bond_set_allmulti(bond, 1);
4010 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
4011 bond_set_allmulti(bond, -1);
4014 read_lock(&bond->lock);
4016 bond->flags = bond_dev->flags;
4018 /* looking for addresses to add to slaves' mc list */
4019 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4020 if (!bond_mc_list_find_dmi(dmi, bond->mc_list))
4021 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4024 /* looking for addresses to delete from slaves' list */
4025 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4026 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list))
4027 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4030 /* save master's multicast list */
4031 bond_mc_list_destroy(bond);
4032 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4034 read_unlock(&bond->lock);
4037 static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4039 struct bonding *bond = netdev_priv(dev);
4040 struct slave *slave = bond->first_slave;
4043 const struct net_device_ops *slave_ops
4044 = slave->dev->netdev_ops;
4045 if (slave_ops->ndo_neigh_setup)
4046 return slave_ops->ndo_neigh_setup(slave->dev, parms);
4052 * Change the MTU of all of a master's slaves to match the master
4054 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4056 struct bonding *bond = netdev_priv(bond_dev);
4057 struct slave *slave, *stop_at;
4061 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
4062 (bond_dev ? bond_dev->name : "None"), new_mtu);
4064 /* Can't hold bond->lock with bh disabled here since
4065 * some base drivers panic. On the other hand we can't
4066 * hold bond->lock without bh disabled because we'll
4067 * deadlock. The only solution is to rely on the fact
4068 * that we're under rtnl_lock here, and the slaves
4069 * list won't change. This doesn't solve the problem
4070 * of setting the slave's MTU while it is
4071 * transmitting, but the assumption is that the base
4072 * driver can handle that.
4074 * TODO: figure out a way to safely iterate the slaves
4075 * list, but without holding a lock around the actual
4076 * call to the base driver.
4079 bond_for_each_slave(bond, slave, i) {
4080 pr_debug("s %p s->p %p c_m %p\n", slave,
4081 slave->prev, slave->dev->netdev_ops->ndo_change_mtu);
4083 res = dev_set_mtu(slave->dev, new_mtu);
4086 /* If we failed to set the slave's mtu to the new value
4087 * we must abort the operation even in ACTIVE_BACKUP
4088 * mode, because if we allow the backup slaves to have
4089 * different mtu values than the active slave we'll
4090 * need to change their mtu when doing a failover. That
4091 * means changing their mtu from timer context, which
4092 * is probably not a good idea.
4094 pr_debug("err %d %s\n", res, slave->dev->name);
4099 bond_dev->mtu = new_mtu;
4104 /* unwind from head to the slave that failed */
4106 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4109 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4111 pr_debug("unwind err %d dev %s\n", tmp_res,
4122 * Note that many devices must be down to change the HW address, and
4123 * downing the master releases all slaves. We can make bonds full of
4124 * bonding devices to test this, however.
4126 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4128 struct bonding *bond = netdev_priv(bond_dev);
4129 struct sockaddr *sa = addr, tmp_sa;
4130 struct slave *slave, *stop_at;
4134 if (bond->params.mode == BOND_MODE_ALB)
4135 return bond_alb_set_mac_address(bond_dev, addr);
4138 pr_debug("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4141 * If fail_over_mac is set to active, do nothing and return
4142 * success. Returning an error causes ifenslave to fail.
4144 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
4147 if (!is_valid_ether_addr(sa->sa_data))
4148 return -EADDRNOTAVAIL;
4150 /* Can't hold bond->lock with bh disabled here since
4151 * some base drivers panic. On the other hand we can't
4152 * hold bond->lock without bh disabled because we'll
4153 * deadlock. The only solution is to rely on the fact
4154 * that we're under rtnl_lock here, and the slaves
4155 * list won't change. This doesn't solve the problem
4156 * of setting the slave's hw address while it is
4157 * transmitting, but the assumption is that the base
4158 * driver can handle that.
4160 * TODO: figure out a way to safely iterate the slaves
4161 * list, but without holding a lock around the actual
4162 * call to the base driver.
4165 bond_for_each_slave(bond, slave, i) {
4166 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
4167 pr_debug("slave %p %s\n", slave, slave->dev->name);
4169 if (slave_ops->ndo_set_mac_address == NULL) {
4171 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
4175 res = dev_set_mac_address(slave->dev, addr);
4177 /* TODO: consider downing the slave
4179 * User should expect communications
4180 * breakage anyway until ARP finish
4183 pr_debug("err %d %s\n", res, slave->dev->name);
4189 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4193 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4194 tmp_sa.sa_family = bond_dev->type;
4196 /* unwind from head to the slave that failed */
4198 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4201 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4203 pr_debug("unwind err %d dev %s\n", tmp_res,
4211 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4213 struct bonding *bond = netdev_priv(bond_dev);
4214 struct slave *slave, *start_at;
4215 int i, slave_no, res = 1;
4217 read_lock(&bond->lock);
4219 if (!BOND_IS_OK(bond))
4223 * Concurrent TX may collide on rr_tx_counter; we accept that
4224 * as being rare enough not to justify using an atomic op here
4226 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4228 bond_for_each_slave(bond, slave, i) {
4235 bond_for_each_slave_from(bond, slave, i, start_at) {
4236 if (IS_UP(slave->dev) &&
4237 (slave->link == BOND_LINK_UP) &&
4238 (slave->state == BOND_STATE_ACTIVE)) {
4239 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4246 /* no suitable interface, frame not sent */
4249 read_unlock(&bond->lock);
4250 return NETDEV_TX_OK;
4255 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4256 * the bond has a usable interface.
4258 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4260 struct bonding *bond = netdev_priv(bond_dev);
4263 read_lock(&bond->lock);
4264 read_lock(&bond->curr_slave_lock);
4266 if (!BOND_IS_OK(bond))
4269 if (!bond->curr_active_slave)
4272 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4276 /* no suitable interface, frame not sent */
4279 read_unlock(&bond->curr_slave_lock);
4280 read_unlock(&bond->lock);
4281 return NETDEV_TX_OK;
4285 * In bond_xmit_xor() , we determine the output device by using a pre-
4286 * determined xmit_hash_policy(), If the selected device is not enabled,
4287 * find the next active slave.
4289 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4291 struct bonding *bond = netdev_priv(bond_dev);
4292 struct slave *slave, *start_at;
4297 read_lock(&bond->lock);
4299 if (!BOND_IS_OK(bond))
4302 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
4304 bond_for_each_slave(bond, slave, i) {
4312 bond_for_each_slave_from(bond, slave, i, start_at) {
4313 if (IS_UP(slave->dev) &&
4314 (slave->link == BOND_LINK_UP) &&
4315 (slave->state == BOND_STATE_ACTIVE)) {
4316 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4323 /* no suitable interface, frame not sent */
4326 read_unlock(&bond->lock);
4327 return NETDEV_TX_OK;
4331 * in broadcast mode, we send everything to all usable interfaces.
4333 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4335 struct bonding *bond = netdev_priv(bond_dev);
4336 struct slave *slave, *start_at;
4337 struct net_device *tx_dev = NULL;
4341 read_lock(&bond->lock);
4343 if (!BOND_IS_OK(bond))
4346 read_lock(&bond->curr_slave_lock);
4347 start_at = bond->curr_active_slave;
4348 read_unlock(&bond->curr_slave_lock);
4353 bond_for_each_slave_from(bond, slave, i, start_at) {
4354 if (IS_UP(slave->dev) &&
4355 (slave->link == BOND_LINK_UP) &&
4356 (slave->state == BOND_STATE_ACTIVE)) {
4358 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4361 ": %s: Error: bond_xmit_broadcast(): "
4362 "skb_clone() failed\n",
4367 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4369 dev_kfree_skb(skb2);
4373 tx_dev = slave->dev;
4378 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4382 /* no suitable interface, frame not sent */
4385 /* frame sent to all suitable interfaces */
4386 read_unlock(&bond->lock);
4387 return NETDEV_TX_OK;
4390 /*------------------------- Device initialization ---------------------------*/
4392 static void bond_set_xmit_hash_policy(struct bonding *bond)
4394 switch (bond->params.xmit_policy) {
4395 case BOND_XMIT_POLICY_LAYER23:
4396 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4398 case BOND_XMIT_POLICY_LAYER34:
4399 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4401 case BOND_XMIT_POLICY_LAYER2:
4403 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4408 static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4410 const struct bonding *bond = netdev_priv(dev);
4412 switch (bond->params.mode) {
4413 case BOND_MODE_ROUNDROBIN:
4414 return bond_xmit_roundrobin(skb, dev);
4415 case BOND_MODE_ACTIVEBACKUP:
4416 return bond_xmit_activebackup(skb, dev);
4418 return bond_xmit_xor(skb, dev);
4419 case BOND_MODE_BROADCAST:
4420 return bond_xmit_broadcast(skb, dev);
4421 case BOND_MODE_8023AD:
4422 return bond_3ad_xmit_xor(skb, dev);
4425 return bond_alb_xmit(skb, dev);
4427 /* Should never happen, mode already checked */
4428 pr_err(DRV_NAME ": %s: Error: Unknown bonding mode %d\n",
4429 dev->name, bond->params.mode);
4432 return NETDEV_TX_OK;
4438 * set bond mode specific net device operations
4440 void bond_set_mode_ops(struct bonding *bond, int mode)
4442 struct net_device *bond_dev = bond->dev;
4445 case BOND_MODE_ROUNDROBIN:
4447 case BOND_MODE_ACTIVEBACKUP:
4450 bond_set_xmit_hash_policy(bond);
4452 case BOND_MODE_BROADCAST:
4454 case BOND_MODE_8023AD:
4455 bond_set_master_3ad_flags(bond);
4456 bond_set_xmit_hash_policy(bond);
4459 bond_set_master_alb_flags(bond);
4464 /* Should never happen, mode already checked */
4466 ": %s: Error: Unknown bonding mode %d\n",
4473 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4474 struct ethtool_drvinfo *drvinfo)
4476 strncpy(drvinfo->driver, DRV_NAME, 32);
4477 strncpy(drvinfo->version, DRV_VERSION, 32);
4478 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4481 static const struct ethtool_ops bond_ethtool_ops = {
4482 .get_drvinfo = bond_ethtool_get_drvinfo,
4483 .get_link = ethtool_op_get_link,
4484 .get_tx_csum = ethtool_op_get_tx_csum,
4485 .get_sg = ethtool_op_get_sg,
4486 .get_tso = ethtool_op_get_tso,
4487 .get_ufo = ethtool_op_get_ufo,
4488 .get_flags = ethtool_op_get_flags,
4491 static const struct net_device_ops bond_netdev_ops = {
4492 .ndo_init = bond_init,
4493 .ndo_uninit = bond_uninit,
4494 .ndo_open = bond_open,
4495 .ndo_stop = bond_close,
4496 .ndo_start_xmit = bond_start_xmit,
4497 .ndo_get_stats = bond_get_stats,
4498 .ndo_do_ioctl = bond_do_ioctl,
4499 .ndo_set_multicast_list = bond_set_multicast_list,
4500 .ndo_change_mtu = bond_change_mtu,
4501 .ndo_set_mac_address = bond_set_mac_address,
4502 .ndo_neigh_setup = bond_neigh_setup,
4503 .ndo_vlan_rx_register = bond_vlan_rx_register,
4504 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4505 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4508 static void bond_setup(struct net_device *bond_dev)
4510 struct bonding *bond = netdev_priv(bond_dev);
4512 /* initialize rwlocks */
4513 rwlock_init(&bond->lock);
4514 rwlock_init(&bond->curr_slave_lock);
4516 bond->params = bonding_defaults;
4518 /* Initialize pointers */
4519 bond->dev = bond_dev;
4520 INIT_LIST_HEAD(&bond->vlan_list);
4522 /* Initialize the device entry points */
4523 ether_setup(bond_dev);
4524 bond_dev->netdev_ops = &bond_netdev_ops;
4525 bond_dev->ethtool_ops = &bond_ethtool_ops;
4526 bond_set_mode_ops(bond, bond->params.mode);
4528 bond_dev->destructor = free_netdev;
4530 /* Initialize the device options */
4531 bond_dev->tx_queue_len = 0;
4532 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4533 bond_dev->priv_flags |= IFF_BONDING;
4534 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4536 if (bond->params.arp_interval)
4537 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
4539 /* At first, we block adding VLANs. That's the only way to
4540 * prevent problems that occur when adding VLANs over an
4541 * empty bond. The block will be removed once non-challenged
4542 * slaves are enslaved.
4544 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4546 /* don't acquire bond device's netif_tx_lock when
4548 bond_dev->features |= NETIF_F_LLTX;
4550 /* By default, we declare the bond to be fully
4551 * VLAN hardware accelerated capable. Special
4552 * care is taken in the various xmit functions
4553 * when there are slaves that are not hw accel
4556 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4557 NETIF_F_HW_VLAN_RX |
4558 NETIF_F_HW_VLAN_FILTER);
4562 static void bond_work_cancel_all(struct bonding *bond)
4564 write_lock_bh(&bond->lock);
4565 bond->kill_timers = 1;
4566 write_unlock_bh(&bond->lock);
4568 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4569 cancel_delayed_work(&bond->mii_work);
4571 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4572 cancel_delayed_work(&bond->arp_work);
4574 if (bond->params.mode == BOND_MODE_ALB &&
4575 delayed_work_pending(&bond->alb_work))
4576 cancel_delayed_work(&bond->alb_work);
4578 if (bond->params.mode == BOND_MODE_8023AD &&
4579 delayed_work_pending(&bond->ad_work))
4580 cancel_delayed_work(&bond->ad_work);
4584 * Destroy a bonding device.
4585 * Must be under rtnl_lock when this function is called.
4587 static void bond_uninit(struct net_device *bond_dev)
4589 struct bonding *bond = netdev_priv(bond_dev);
4591 /* Release the bonded slaves */
4592 bond_release_all(bond_dev);
4594 list_del(&bond->bond_list);
4596 bond_work_cancel_all(bond);
4598 bond_remove_proc_entry(bond);
4601 destroy_workqueue(bond->wq);
4603 netif_addr_lock_bh(bond_dev);
4604 bond_mc_list_destroy(bond);
4605 netif_addr_unlock_bh(bond_dev);
4608 /*------------------------- Module initialization ---------------------------*/
4611 * Convert string input module parms. Accept either the
4612 * number of the mode or its string name. A bit complicated because
4613 * some mode names are substrings of other names, and calls from sysfs
4614 * may have whitespace in the name (trailing newlines, for example).
4616 int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4618 int modeint = -1, i, rv;
4619 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4621 for (p = (char *)buf; *p; p++)
4622 if (!(isdigit(*p) || isspace(*p)))
4626 rv = sscanf(buf, "%20s", modestr);
4628 rv = sscanf(buf, "%d", &modeint);
4633 for (i = 0; tbl[i].modename; i++) {
4634 if (modeint == tbl[i].mode)
4636 if (strcmp(modestr, tbl[i].modename) == 0)
4643 static int bond_check_params(struct bond_params *params)
4645 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
4648 * Convert string parameters.
4651 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4652 if (bond_mode == -1) {
4654 ": Error: Invalid bonding mode \"%s\"\n",
4655 mode == NULL ? "NULL" : mode);
4660 if (xmit_hash_policy) {
4661 if ((bond_mode != BOND_MODE_XOR) &&
4662 (bond_mode != BOND_MODE_8023AD)) {
4664 ": xmit_hash_policy param is irrelevant in"
4666 bond_mode_name(bond_mode));
4668 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4670 if (xmit_hashtype == -1) {
4672 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4673 xmit_hash_policy == NULL ? "NULL" :
4681 if (bond_mode != BOND_MODE_8023AD) {
4683 ": lacp_rate param is irrelevant in mode %s\n",
4684 bond_mode_name(bond_mode));
4686 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4687 if (lacp_fast == -1) {
4689 ": Error: Invalid lacp rate \"%s\"\n",
4690 lacp_rate == NULL ? "NULL" : lacp_rate);
4697 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4698 if (params->ad_select == -1) {
4700 ": Error: Invalid ad_select \"%s\"\n",
4701 ad_select == NULL ? "NULL" : ad_select);
4705 if (bond_mode != BOND_MODE_8023AD) {
4707 ": ad_select param only affects 802.3ad mode\n");
4710 params->ad_select = BOND_AD_STABLE;
4713 if (max_bonds < 0) {
4715 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4716 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4717 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4718 max_bonds = BOND_DEFAULT_MAX_BONDS;
4723 ": Warning: miimon module parameter (%d), "
4724 "not in range 0-%d, so it was reset to %d\n",
4725 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4726 miimon = BOND_LINK_MON_INTERV;
4731 ": Warning: updelay module parameter (%d), "
4732 "not in range 0-%d, so it was reset to 0\n",
4737 if (downdelay < 0) {
4739 ": Warning: downdelay module parameter (%d), "
4740 "not in range 0-%d, so it was reset to 0\n",
4741 downdelay, INT_MAX);
4745 if ((use_carrier != 0) && (use_carrier != 1)) {
4747 ": Warning: use_carrier module parameter (%d), "
4748 "not of valid value (0/1), so it was set to 1\n",
4753 if (num_grat_arp < 0 || num_grat_arp > 255) {
4755 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4756 "was reset to 1 \n", num_grat_arp);
4760 if (num_unsol_na < 0 || num_unsol_na > 255) {
4762 ": Warning: num_unsol_na (%d) not in range 0-255 so it "
4763 "was reset to 1 \n", num_unsol_na);
4767 /* reset values for 802.3ad */
4768 if (bond_mode == BOND_MODE_8023AD) {
4771 ": Warning: miimon must be specified, "
4772 "otherwise bonding will not detect link "
4773 "failure, speed and duplex which are "
4774 "essential for 802.3ad operation\n");
4775 pr_warning("Forcing miimon to 100msec\n");
4780 /* reset values for TLB/ALB */
4781 if ((bond_mode == BOND_MODE_TLB) ||
4782 (bond_mode == BOND_MODE_ALB)) {
4785 ": Warning: miimon must be specified, "
4786 "otherwise bonding will not detect link "
4787 "failure and link speed which are essential "
4788 "for TLB/ALB load balancing\n");
4789 pr_warning("Forcing miimon to 100msec\n");
4794 if (bond_mode == BOND_MODE_ALB) {
4796 ": In ALB mode you might experience client "
4797 "disconnections upon reconnection of a link if the "
4798 "bonding module updelay parameter (%d msec) is "
4799 "incompatible with the forwarding delay time of the "
4805 if (updelay || downdelay) {
4806 /* just warn the user the up/down delay will have
4807 * no effect since miimon is zero...
4810 ": Warning: miimon module parameter not set "
4811 "and updelay (%d) or downdelay (%d) module "
4812 "parameter is set; updelay and downdelay have "
4813 "no effect unless miimon is set\n",
4814 updelay, downdelay);
4817 /* don't allow arp monitoring */
4820 ": Warning: miimon (%d) and arp_interval (%d) "
4821 "can't be used simultaneously, disabling ARP "
4823 miimon, arp_interval);
4827 if ((updelay % miimon) != 0) {
4829 ": Warning: updelay (%d) is not a multiple "
4830 "of miimon (%d), updelay rounded to %d ms\n",
4831 updelay, miimon, (updelay / miimon) * miimon);
4836 if ((downdelay % miimon) != 0) {
4838 ": Warning: downdelay (%d) is not a multiple "
4839 "of miimon (%d), downdelay rounded to %d ms\n",
4841 (downdelay / miimon) * miimon);
4844 downdelay /= miimon;
4847 if (arp_interval < 0) {
4849 ": Warning: arp_interval module parameter (%d) "
4850 ", not in range 0-%d, so it was reset to %d\n",
4851 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4852 arp_interval = BOND_LINK_ARP_INTERV;
4855 for (arp_ip_count = 0;
4856 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4858 /* not complete check, but should be good enough to
4860 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4862 ": Warning: bad arp_ip_target module parameter "
4863 "(%s), ARP monitoring will not be performed\n",
4864 arp_ip_target[arp_ip_count]);
4867 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
4868 arp_target[arp_ip_count] = ip;
4872 if (arp_interval && !arp_ip_count) {
4873 /* don't allow arping if no arp_ip_target given... */
4875 ": Warning: arp_interval module parameter (%d) "
4876 "specified without providing an arp_ip_target "
4877 "parameter, arp_interval was reset to 0\n",
4883 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4885 ": arp_validate only supported in active-backup mode\n");
4888 if (!arp_interval) {
4890 ": arp_validate requires arp_interval\n");
4894 arp_validate_value = bond_parse_parm(arp_validate,
4896 if (arp_validate_value == -1) {
4898 ": Error: invalid arp_validate \"%s\"\n",
4899 arp_validate == NULL ? "NULL" : arp_validate);
4903 arp_validate_value = 0;
4907 ": MII link monitoring set to %d ms\n",
4909 } else if (arp_interval) {
4912 pr_info(DRV_NAME ": ARP monitoring set to %d ms,"
4913 " validate %s, with %d target(s):",
4915 arp_validate_tbl[arp_validate_value].modename,
4918 for (i = 0; i < arp_ip_count; i++)
4919 pr_info(" %s", arp_ip_target[i]);
4923 } else if (max_bonds) {
4924 /* miimon and arp_interval not set, we need one so things
4925 * work as expected, see bonding.txt for details
4928 ": Warning: either miimon or arp_interval and "
4929 "arp_ip_target module parameters must be specified, "
4930 "otherwise bonding will not detect link failures! see "
4931 "bonding.txt for details.\n");
4934 if (primary && !USES_PRIMARY(bond_mode)) {
4935 /* currently, using a primary only makes sense
4936 * in active backup, TLB or ALB modes
4939 ": Warning: %s primary device specified but has no "
4940 "effect in %s mode\n",
4941 primary, bond_mode_name(bond_mode));
4945 if (primary && primary_reselect) {
4946 primary_reselect_value = bond_parse_parm(primary_reselect,
4948 if (primary_reselect_value == -1) {
4950 ": Error: Invalid primary_reselect \"%s\"\n",
4952 NULL ? "NULL" : primary_reselect);
4956 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
4959 if (fail_over_mac) {
4960 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4962 if (fail_over_mac_value == -1) {
4964 ": Error: invalid fail_over_mac \"%s\"\n",
4965 arp_validate == NULL ? "NULL" : arp_validate);
4969 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4971 ": Warning: fail_over_mac only affects "
4972 "active-backup mode.\n");
4974 fail_over_mac_value = BOND_FOM_NONE;
4977 /* fill params struct with the proper values */
4978 params->mode = bond_mode;
4979 params->xmit_policy = xmit_hashtype;
4980 params->miimon = miimon;
4981 params->num_grat_arp = num_grat_arp;
4982 params->num_unsol_na = num_unsol_na;
4983 params->arp_interval = arp_interval;
4984 params->arp_validate = arp_validate_value;
4985 params->updelay = updelay;
4986 params->downdelay = downdelay;
4987 params->use_carrier = use_carrier;
4988 params->lacp_fast = lacp_fast;
4989 params->primary[0] = 0;
4990 params->primary_reselect = primary_reselect_value;
4991 params->fail_over_mac = fail_over_mac_value;
4994 strncpy(params->primary, primary, IFNAMSIZ);
4995 params->primary[IFNAMSIZ - 1] = 0;
4998 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5003 static struct lock_class_key bonding_netdev_xmit_lock_key;
5004 static struct lock_class_key bonding_netdev_addr_lock_key;
5006 static void bond_set_lockdep_class_one(struct net_device *dev,
5007 struct netdev_queue *txq,
5010 lockdep_set_class(&txq->_xmit_lock,
5011 &bonding_netdev_xmit_lock_key);
5014 static void bond_set_lockdep_class(struct net_device *dev)
5016 lockdep_set_class(&dev->addr_list_lock,
5017 &bonding_netdev_addr_lock_key);
5018 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
5022 * Called from registration process
5024 static int bond_init(struct net_device *bond_dev)
5026 struct bonding *bond = netdev_priv(bond_dev);
5027 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
5029 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5031 bond->wq = create_singlethread_workqueue(bond_dev->name);
5035 bond_set_lockdep_class(bond_dev);
5037 netif_carrier_off(bond_dev);
5039 bond_create_proc_entry(bond);
5040 list_add_tail(&bond->bond_list, &bn->dev_list);
5042 bond_prepare_sysfs_group(bond);
5046 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
5048 if (tb[IFLA_ADDRESS]) {
5049 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
5051 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
5052 return -EADDRNOTAVAIL;
5057 static struct rtnl_link_ops bond_link_ops __read_mostly = {
5059 .priv_size = sizeof(struct bonding),
5060 .setup = bond_setup,
5061 .validate = bond_validate,
5064 /* Create a new bond based on the specified name and bonding parameters.
5065 * If name is NULL, obtain a suitable "bond%d" name for us.
5066 * Caller must NOT hold rtnl_lock; we need to release it here before we
5067 * set up our sysfs entries.
5069 int bond_create(struct net *net, const char *name)
5071 struct net_device *bond_dev;
5076 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5079 pr_err(DRV_NAME ": %s: eek! can't alloc netdev!\n",
5085 dev_net_set(bond_dev, net);
5086 bond_dev->rtnl_link_ops = &bond_link_ops;
5089 res = dev_alloc_name(bond_dev, "bond%d");
5094 res = register_netdevice(bond_dev);
5100 free_netdev(bond_dev);
5104 static int bond_net_init(struct net *net)
5106 struct bond_net *bn = net_generic(net, bond_net_id);
5109 INIT_LIST_HEAD(&bn->dev_list);
5111 bond_create_proc_dir(bn);
5116 static void bond_net_exit(struct net *net)
5118 struct bond_net *bn = net_generic(net, bond_net_id);
5120 bond_destroy_proc_dir(bn);
5123 static struct pernet_operations bond_net_ops = {
5124 .init = bond_net_init,
5125 .exit = bond_net_exit,
5127 .size = sizeof(struct bond_net),
5130 static int __init bonding_init(void)
5135 pr_info("%s", version);
5137 res = bond_check_params(&bonding_defaults);
5141 res = register_pernet_subsys(&bond_net_ops);
5145 res = rtnl_link_register(&bond_link_ops);
5149 for (i = 0; i < max_bonds; i++) {
5150 res = bond_create(&init_net, NULL);
5155 res = bond_create_sysfs();
5159 register_netdevice_notifier(&bond_netdev_notifier);
5160 register_inetaddr_notifier(&bond_inetaddr_notifier);
5161 bond_register_ipv6_notifier();
5165 rtnl_link_unregister(&bond_link_ops);
5167 unregister_pernet_subsys(&bond_net_ops);
5172 static void __exit bonding_exit(void)
5174 unregister_netdevice_notifier(&bond_netdev_notifier);
5175 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
5176 bond_unregister_ipv6_notifier();
5178 bond_destroy_sysfs();
5180 rtnl_link_unregister(&bond_link_ops);
5181 unregister_pernet_subsys(&bond_net_ops);
5184 module_init(bonding_init);
5185 module_exit(bonding_exit);
5186 MODULE_LICENSE("GPL");
5187 MODULE_VERSION(DRV_VERSION);
5188 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5189 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5190 MODULE_ALIAS_RTNL_LINK("bond");