2 * originally based on the dummy device.
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
7 * bonding.c: an Ethernet Bonding driver
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
14 * and probably many L2 switches ...
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
24 * will release all slaves, marking them as down.
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
34 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
36 #include <linux/kernel.h>
37 #include <linux/module.h>
38 #include <linux/types.h>
39 #include <linux/fcntl.h>
40 #include <linux/interrupt.h>
41 #include <linux/ptrace.h>
42 #include <linux/ioport.h>
46 #include <linux/tcp.h>
47 #include <linux/udp.h>
48 #include <linux/slab.h>
49 #include <linux/string.h>
50 #include <linux/init.h>
51 #include <linux/timer.h>
52 #include <linux/socket.h>
53 #include <linux/ctype.h>
54 #include <linux/inet.h>
55 #include <linux/bitops.h>
57 #include <asm/system.h>
59 #include <linux/uaccess.h>
60 #include <linux/errno.h>
61 #include <linux/netdevice.h>
62 #include <linux/inetdevice.h>
63 #include <linux/igmp.h>
64 #include <linux/etherdevice.h>
65 #include <linux/skbuff.h>
67 #include <linux/rtnetlink.h>
68 #include <linux/proc_fs.h>
69 #include <linux/seq_file.h>
70 #include <linux/smp.h>
71 #include <linux/if_ether.h>
73 #include <linux/mii.h>
74 #include <linux/ethtool.h>
75 #include <linux/if_vlan.h>
76 #include <linux/if_bonding.h>
77 #include <linux/jiffies.h>
78 #include <net/route.h>
79 #include <net/net_namespace.h>
80 #include <net/netns/generic.h>
85 /*---------------------------- Module parameters ----------------------------*/
87 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
88 #define BOND_LINK_MON_INTERV 0
89 #define BOND_LINK_ARP_INTERV 0
91 static int max_bonds = BOND_DEFAULT_MAX_BONDS;
92 static int num_grat_arp = 1;
93 static int num_unsol_na = 1;
94 static int miimon = BOND_LINK_MON_INTERV;
97 static int use_carrier = 1;
100 static char *primary_reselect;
101 static char *lacp_rate;
102 static char *ad_select;
103 static char *xmit_hash_policy;
104 static int arp_interval = BOND_LINK_ARP_INTERV;
105 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
106 static char *arp_validate;
107 static char *fail_over_mac;
108 static struct bond_params bonding_defaults;
110 module_param(max_bonds, int, 0);
111 MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
112 module_param(num_grat_arp, int, 0644);
113 MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
114 module_param(num_unsol_na, int, 0644);
115 MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
116 module_param(miimon, int, 0);
117 MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
118 module_param(updelay, int, 0);
119 MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
120 module_param(downdelay, int, 0);
121 MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
123 module_param(use_carrier, int, 0);
124 MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
125 "0 for off, 1 for on (default)");
126 module_param(mode, charp, 0);
127 MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
128 "1 for active-backup, 2 for balance-xor, "
129 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
130 "6 for balance-alb");
131 module_param(primary, charp, 0);
132 MODULE_PARM_DESC(primary, "Primary network device to use");
133 module_param(primary_reselect, charp, 0);
134 MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
136 "0 for always (default), "
137 "1 for only if speed of primary is "
139 "2 for only on active slave "
141 module_param(lacp_rate, charp, 0);
142 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
144 module_param(ad_select, charp, 0);
145 MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
146 module_param(xmit_hash_policy, charp, 0);
147 MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
148 ", 1 for layer 3+4");
149 module_param(arp_interval, int, 0);
150 MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
151 module_param_array(arp_ip_target, charp, NULL, 0);
152 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
153 module_param(arp_validate, charp, 0);
154 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
155 module_param(fail_over_mac, charp, 0);
156 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
158 /*----------------------------- Global variables ----------------------------*/
160 static const char * const version =
161 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
163 int bond_net_id __read_mostly;
165 static __be32 arp_target[BOND_MAX_ARP_TARGETS];
166 static int arp_ip_count;
167 static int bond_mode = BOND_MODE_ROUNDROBIN;
168 static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
169 static int lacp_fast;
172 const struct bond_parm_tbl bond_lacp_tbl[] = {
173 { "slow", AD_LACP_SLOW},
174 { "fast", AD_LACP_FAST},
178 const struct bond_parm_tbl bond_mode_tbl[] = {
179 { "balance-rr", BOND_MODE_ROUNDROBIN},
180 { "active-backup", BOND_MODE_ACTIVEBACKUP},
181 { "balance-xor", BOND_MODE_XOR},
182 { "broadcast", BOND_MODE_BROADCAST},
183 { "802.3ad", BOND_MODE_8023AD},
184 { "balance-tlb", BOND_MODE_TLB},
185 { "balance-alb", BOND_MODE_ALB},
189 const struct bond_parm_tbl xmit_hashtype_tbl[] = {
190 { "layer2", BOND_XMIT_POLICY_LAYER2},
191 { "layer3+4", BOND_XMIT_POLICY_LAYER34},
192 { "layer2+3", BOND_XMIT_POLICY_LAYER23},
196 const struct bond_parm_tbl arp_validate_tbl[] = {
197 { "none", BOND_ARP_VALIDATE_NONE},
198 { "active", BOND_ARP_VALIDATE_ACTIVE},
199 { "backup", BOND_ARP_VALIDATE_BACKUP},
200 { "all", BOND_ARP_VALIDATE_ALL},
204 const struct bond_parm_tbl fail_over_mac_tbl[] = {
205 { "none", BOND_FOM_NONE},
206 { "active", BOND_FOM_ACTIVE},
207 { "follow", BOND_FOM_FOLLOW},
211 const struct bond_parm_tbl pri_reselect_tbl[] = {
212 { "always", BOND_PRI_RESELECT_ALWAYS},
213 { "better", BOND_PRI_RESELECT_BETTER},
214 { "failure", BOND_PRI_RESELECT_FAILURE},
218 struct bond_parm_tbl ad_select_tbl[] = {
219 { "stable", BOND_AD_STABLE},
220 { "bandwidth", BOND_AD_BANDWIDTH},
221 { "count", BOND_AD_COUNT},
225 /*-------------------------- Forward declarations ---------------------------*/
227 static void bond_send_gratuitous_arp(struct bonding *bond);
228 static int bond_init(struct net_device *bond_dev);
229 static void bond_uninit(struct net_device *bond_dev);
231 /*---------------------------- General routines -----------------------------*/
233 static const char *bond_mode_name(int mode)
235 static const char *names[] = {
236 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
237 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
238 [BOND_MODE_XOR] = "load balancing (xor)",
239 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
240 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
241 [BOND_MODE_TLB] = "transmit load balancing",
242 [BOND_MODE_ALB] = "adaptive load balancing",
245 if (mode < 0 || mode > BOND_MODE_ALB)
251 /*---------------------------------- VLAN -----------------------------------*/
254 * bond_add_vlan - add a new vlan id on bond
255 * @bond: bond that got the notification
256 * @vlan_id: the vlan id to add
258 * Returns -ENOMEM if allocation failed.
260 static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
262 struct vlan_entry *vlan;
264 pr_debug("bond: %s, vlan id %d\n",
265 (bond ? bond->dev->name : "None"), vlan_id);
267 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
271 INIT_LIST_HEAD(&vlan->vlan_list);
272 vlan->vlan_id = vlan_id;
274 write_lock_bh(&bond->lock);
276 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
278 write_unlock_bh(&bond->lock);
280 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
286 * bond_del_vlan - delete a vlan id from bond
287 * @bond: bond that got the notification
288 * @vlan_id: the vlan id to delete
290 * returns -ENODEV if @vlan_id was not found in @bond.
292 static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
294 struct vlan_entry *vlan;
297 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
299 write_lock_bh(&bond->lock);
301 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
302 if (vlan->vlan_id == vlan_id) {
303 list_del(&vlan->vlan_list);
305 if (bond_is_lb(bond))
306 bond_alb_clear_vlan(bond, vlan_id);
308 pr_debug("removed VLAN ID %d from bond %s\n",
309 vlan_id, bond->dev->name);
313 if (list_empty(&bond->vlan_list) &&
314 (bond->slave_cnt == 0)) {
315 /* Last VLAN removed and no slaves, so
316 * restore block on adding VLANs. This will
317 * be removed once new slaves that are not
318 * VLAN challenged will be added.
320 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
328 pr_debug("couldn't find VLAN ID %d in bond %s\n",
329 vlan_id, bond->dev->name);
332 write_unlock_bh(&bond->lock);
337 * bond_has_challenged_slaves
338 * @bond: the bond we're working on
340 * Searches the slave list. Returns 1 if a vlan challenged slave
341 * was found, 0 otherwise.
343 * Assumes bond->lock is held.
345 static int bond_has_challenged_slaves(struct bonding *bond)
350 bond_for_each_slave(bond, slave, i) {
351 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
352 pr_debug("found VLAN challenged slave - %s\n",
358 pr_debug("no VLAN challenged slaves found\n");
363 * bond_next_vlan - safely skip to the next item in the vlans list.
364 * @bond: the bond we're working on
365 * @curr: item we're advancing from
367 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
368 * or @curr->next otherwise (even if it is @curr itself again).
370 * Caller must hold bond->lock
372 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
374 struct vlan_entry *next, *last;
376 if (list_empty(&bond->vlan_list))
380 next = list_entry(bond->vlan_list.next,
381 struct vlan_entry, vlan_list);
383 last = list_entry(bond->vlan_list.prev,
384 struct vlan_entry, vlan_list);
386 next = list_entry(bond->vlan_list.next,
387 struct vlan_entry, vlan_list);
389 next = list_entry(curr->vlan_list.next,
390 struct vlan_entry, vlan_list);
398 * bond_dev_queue_xmit - Prepare skb for xmit.
400 * @bond: bond device that got this skb for tx.
401 * @skb: hw accel VLAN tagged skb to transmit
402 * @slave_dev: slave that is supposed to xmit this skbuff
404 * When the bond gets an skb to transmit that is
405 * already hardware accelerated VLAN tagged, and it
406 * needs to relay this skb to a slave that is not
407 * hw accel capable, the skb needs to be "unaccelerated",
408 * i.e. strip the hwaccel tag and re-insert it as part
411 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
412 struct net_device *slave_dev)
414 unsigned short uninitialized_var(vlan_id);
416 if (!list_empty(&bond->vlan_list) &&
417 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
418 vlan_get_tag(skb, &vlan_id) == 0) {
419 skb->dev = slave_dev;
420 skb = vlan_put_tag(skb, vlan_id);
422 /* vlan_put_tag() frees the skb in case of error,
423 * so return success here so the calling functions
424 * won't attempt to free is again.
429 skb->dev = slave_dev;
439 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
440 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
442 * a. This operation is performed in IOCTL context,
443 * b. The operation is protected by the RTNL semaphore in the 8021q code,
444 * c. Holding a lock with BH disabled while directly calling a base driver
445 * entry point is generally a BAD idea.
447 * The design of synchronization/protection for this operation in the 8021q
448 * module is good for one or more VLAN devices over a single physical device
449 * and cannot be extended for a teaming solution like bonding, so there is a
450 * potential race condition here where a net device from the vlan group might
451 * be referenced (either by a base driver or the 8021q code) while it is being
452 * removed from the system. However, it turns out we're not making matters
453 * worse, and if it works for regular VLAN usage it will work here too.
457 * bond_vlan_rx_register - Propagates registration to slaves
458 * @bond_dev: bonding net device that got called
459 * @grp: vlan group being registered
461 static void bond_vlan_rx_register(struct net_device *bond_dev,
462 struct vlan_group *grp)
464 struct bonding *bond = netdev_priv(bond_dev);
470 bond_for_each_slave(bond, slave, i) {
471 struct net_device *slave_dev = slave->dev;
472 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
474 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
475 slave_ops->ndo_vlan_rx_register) {
476 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
482 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
483 * @bond_dev: bonding net device that got called
484 * @vid: vlan id being added
486 static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
488 struct bonding *bond = netdev_priv(bond_dev);
492 bond_for_each_slave(bond, slave, i) {
493 struct net_device *slave_dev = slave->dev;
494 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
496 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
497 slave_ops->ndo_vlan_rx_add_vid) {
498 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
502 res = bond_add_vlan(bond, vid);
504 pr_err("%s: Error: Failed to add vlan id %d\n",
505 bond_dev->name, vid);
510 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
511 * @bond_dev: bonding net device that got called
512 * @vid: vlan id being removed
514 static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
516 struct bonding *bond = netdev_priv(bond_dev);
518 struct net_device *vlan_dev;
521 bond_for_each_slave(bond, slave, i) {
522 struct net_device *slave_dev = slave->dev;
523 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
525 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
526 slave_ops->ndo_vlan_rx_kill_vid) {
527 /* Save and then restore vlan_dev in the grp array,
528 * since the slave's driver might clear it.
530 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
531 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
532 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
536 res = bond_del_vlan(bond, vid);
538 pr_err("%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 * Push the promiscuity flag down to appropriate slaves
767 static int bond_set_promiscuity(struct bonding *bond, int inc)
770 if (USES_PRIMARY(bond->params.mode)) {
771 /* write lock already acquired */
772 if (bond->curr_active_slave) {
773 err = dev_set_promiscuity(bond->curr_active_slave->dev,
779 bond_for_each_slave(bond, slave, i) {
780 err = dev_set_promiscuity(slave->dev, inc);
789 * Push the allmulti flag down to all slaves
791 static int bond_set_allmulti(struct bonding *bond, int inc)
794 if (USES_PRIMARY(bond->params.mode)) {
795 /* write lock already acquired */
796 if (bond->curr_active_slave) {
797 err = dev_set_allmulti(bond->curr_active_slave->dev,
803 bond_for_each_slave(bond, slave, i) {
804 err = dev_set_allmulti(slave->dev, inc);
813 * Add a Multicast address to slaves
816 static void bond_mc_add(struct bonding *bond, void *addr)
818 if (USES_PRIMARY(bond->params.mode)) {
819 /* write lock already acquired */
820 if (bond->curr_active_slave)
821 dev_mc_add(bond->curr_active_slave->dev, addr);
826 bond_for_each_slave(bond, slave, i)
827 dev_mc_add(slave->dev, addr);
832 * Remove a multicast address from slave
835 static void bond_mc_del(struct bonding *bond, void *addr)
837 if (USES_PRIMARY(bond->params.mode)) {
838 /* write lock already acquired */
839 if (bond->curr_active_slave)
840 dev_mc_del(bond->curr_active_slave->dev, addr);
844 bond_for_each_slave(bond, slave, i) {
845 dev_mc_del(slave->dev, addr);
852 * Retrieve the list of registered multicast addresses for the bonding
853 * device and retransmit an IGMP JOIN request to the current active
856 static void bond_resend_igmp_join_requests(struct bonding *bond)
858 struct in_device *in_dev;
859 struct ip_mc_list *im;
862 in_dev = __in_dev_get_rcu(bond->dev);
864 for (im = in_dev->mc_list; im; im = im->next)
865 ip_mc_rejoin_group(im);
872 * flush all members of flush->mc_list from device dev->mc_list
874 static void bond_mc_list_flush(struct net_device *bond_dev,
875 struct net_device *slave_dev)
877 struct bonding *bond = netdev_priv(bond_dev);
878 struct netdev_hw_addr *ha;
880 netdev_for_each_mc_addr(ha, bond_dev)
881 dev_mc_del(slave_dev, ha->addr);
883 if (bond->params.mode == BOND_MODE_8023AD) {
884 /* del lacpdu mc addr from mc list */
885 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
887 dev_mc_del(slave_dev, lacpdu_multicast);
891 /*--------------------------- Active slave change ---------------------------*/
894 * Update the mc list and multicast-related flags for the new and
895 * old active slaves (if any) according to the multicast mode, and
896 * promiscuous flags unconditionally.
898 static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
899 struct slave *old_active)
901 struct netdev_hw_addr *ha;
903 if (!USES_PRIMARY(bond->params.mode))
904 /* nothing to do - mc list is already up-to-date on
910 if (bond->dev->flags & IFF_PROMISC)
911 dev_set_promiscuity(old_active->dev, -1);
913 if (bond->dev->flags & IFF_ALLMULTI)
914 dev_set_allmulti(old_active->dev, -1);
916 netdev_for_each_mc_addr(ha, bond->dev)
917 dev_mc_del(old_active->dev, ha->addr);
921 /* FIXME: Signal errors upstream. */
922 if (bond->dev->flags & IFF_PROMISC)
923 dev_set_promiscuity(new_active->dev, 1);
925 if (bond->dev->flags & IFF_ALLMULTI)
926 dev_set_allmulti(new_active->dev, 1);
928 netdev_for_each_mc_addr(ha, bond->dev)
929 dev_mc_add(new_active->dev, ha->addr);
930 bond_resend_igmp_join_requests(bond);
935 * bond_do_fail_over_mac
937 * Perform special MAC address swapping for fail_over_mac settings
939 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
941 static void bond_do_fail_over_mac(struct bonding *bond,
942 struct slave *new_active,
943 struct slave *old_active)
944 __releases(&bond->curr_slave_lock)
945 __releases(&bond->lock)
946 __acquires(&bond->lock)
947 __acquires(&bond->curr_slave_lock)
949 u8 tmp_mac[ETH_ALEN];
950 struct sockaddr saddr;
953 switch (bond->params.fail_over_mac) {
954 case BOND_FOM_ACTIVE:
956 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
957 new_active->dev->addr_len);
959 case BOND_FOM_FOLLOW:
961 * if new_active && old_active, swap them
962 * if just old_active, do nothing (going to no active slave)
963 * if just new_active, set new_active to bond's MAC
968 write_unlock_bh(&bond->curr_slave_lock);
969 read_unlock(&bond->lock);
972 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
973 memcpy(saddr.sa_data, old_active->dev->dev_addr,
975 saddr.sa_family = new_active->dev->type;
977 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
978 saddr.sa_family = bond->dev->type;
981 rv = dev_set_mac_address(new_active->dev, &saddr);
983 pr_err("%s: Error %d setting MAC of slave %s\n",
984 bond->dev->name, -rv, new_active->dev->name);
991 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
992 saddr.sa_family = old_active->dev->type;
994 rv = dev_set_mac_address(old_active->dev, &saddr);
996 pr_err("%s: Error %d setting MAC of slave %s\n",
997 bond->dev->name, -rv, new_active->dev->name);
999 read_lock(&bond->lock);
1000 write_lock_bh(&bond->curr_slave_lock);
1003 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
1004 bond->dev->name, bond->params.fail_over_mac);
1010 static bool bond_should_change_active(struct bonding *bond)
1012 struct slave *prim = bond->primary_slave;
1013 struct slave *curr = bond->curr_active_slave;
1015 if (!prim || !curr || curr->link != BOND_LINK_UP)
1017 if (bond->force_primary) {
1018 bond->force_primary = false;
1021 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
1022 (prim->speed < curr->speed ||
1023 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
1025 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
1031 * find_best_interface - select the best available slave to be the active one
1032 * @bond: our bonding struct
1034 * Warning: Caller must hold curr_slave_lock for writing.
1036 static struct slave *bond_find_best_slave(struct bonding *bond)
1038 struct slave *new_active, *old_active;
1039 struct slave *bestslave = NULL;
1040 int mintime = bond->params.updelay;
1043 new_active = bond->curr_active_slave;
1045 if (!new_active) { /* there were no active slaves left */
1046 if (bond->slave_cnt > 0) /* found one slave */
1047 new_active = bond->first_slave;
1049 return NULL; /* still no slave, return NULL */
1052 if ((bond->primary_slave) &&
1053 bond->primary_slave->link == BOND_LINK_UP &&
1054 bond_should_change_active(bond)) {
1055 new_active = bond->primary_slave;
1058 /* remember where to stop iterating over the slaves */
1059 old_active = new_active;
1061 bond_for_each_slave_from(bond, new_active, i, old_active) {
1062 if (new_active->link == BOND_LINK_UP) {
1064 } else if (new_active->link == BOND_LINK_BACK &&
1065 IS_UP(new_active->dev)) {
1066 /* link up, but waiting for stabilization */
1067 if (new_active->delay < mintime) {
1068 mintime = new_active->delay;
1069 bestslave = new_active;
1078 * change_active_interface - change the active slave into the specified one
1079 * @bond: our bonding struct
1080 * @new: the new slave to make the active one
1082 * Set the new slave to the bond's settings and unset them on the old
1083 * curr_active_slave.
1084 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1086 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1087 * because it is apparently the best available slave we have, even though its
1088 * updelay hasn't timed out yet.
1090 * If new_active is not NULL, caller must hold bond->lock for read and
1091 * curr_slave_lock for write_bh.
1093 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1095 struct slave *old_active = bond->curr_active_slave;
1097 if (old_active == new_active)
1101 new_active->jiffies = jiffies;
1103 if (new_active->link == BOND_LINK_BACK) {
1104 if (USES_PRIMARY(bond->params.mode)) {
1105 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1106 bond->dev->name, new_active->dev->name,
1107 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1110 new_active->delay = 0;
1111 new_active->link = BOND_LINK_UP;
1113 if (bond->params.mode == BOND_MODE_8023AD)
1114 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1116 if (bond_is_lb(bond))
1117 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1119 if (USES_PRIMARY(bond->params.mode)) {
1120 pr_info("%s: making interface %s the new active one.\n",
1121 bond->dev->name, new_active->dev->name);
1126 if (USES_PRIMARY(bond->params.mode))
1127 bond_mc_swap(bond, new_active, old_active);
1129 if (bond_is_lb(bond)) {
1130 bond_alb_handle_active_change(bond, new_active);
1132 bond_set_slave_inactive_flags(old_active);
1134 bond_set_slave_active_flags(new_active);
1136 bond->curr_active_slave = new_active;
1139 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1141 bond_set_slave_inactive_flags(old_active);
1144 bond_set_slave_active_flags(new_active);
1146 if (bond->params.fail_over_mac)
1147 bond_do_fail_over_mac(bond, new_active,
1150 bond->send_grat_arp = bond->params.num_grat_arp;
1151 bond_send_gratuitous_arp(bond);
1153 bond->send_unsol_na = bond->params.num_unsol_na;
1154 bond_send_unsolicited_na(bond);
1156 write_unlock_bh(&bond->curr_slave_lock);
1157 read_unlock(&bond->lock);
1159 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
1161 read_lock(&bond->lock);
1162 write_lock_bh(&bond->curr_slave_lock);
1168 * bond_select_active_slave - select a new active slave, if needed
1169 * @bond: our bonding struct
1171 * This functions should be called when one of the following occurs:
1172 * - The old curr_active_slave has been released or lost its link.
1173 * - The primary_slave has got its link back.
1174 * - A slave has got its link back and there's no old curr_active_slave.
1176 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1178 void bond_select_active_slave(struct bonding *bond)
1180 struct slave *best_slave;
1183 best_slave = bond_find_best_slave(bond);
1184 if (best_slave != bond->curr_active_slave) {
1185 bond_change_active_slave(bond, best_slave);
1186 rv = bond_set_carrier(bond);
1190 if (netif_carrier_ok(bond->dev)) {
1191 pr_info("%s: first active interface up!\n",
1194 pr_info("%s: now running without any active interface !\n",
1200 /*--------------------------- slave list handling ---------------------------*/
1203 * This function attaches the slave to the end of list.
1205 * bond->lock held for writing by caller.
1207 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1209 if (bond->first_slave == NULL) { /* attaching the first slave */
1210 new_slave->next = new_slave;
1211 new_slave->prev = new_slave;
1212 bond->first_slave = new_slave;
1214 new_slave->next = bond->first_slave;
1215 new_slave->prev = bond->first_slave->prev;
1216 new_slave->next->prev = new_slave;
1217 new_slave->prev->next = new_slave;
1224 * This function detaches the slave from the list.
1225 * WARNING: no check is made to verify if the slave effectively
1226 * belongs to <bond>.
1227 * Nothing is freed on return, structures are just unchained.
1228 * If any slave pointer in bond was pointing to <slave>,
1229 * it should be changed by the calling function.
1231 * bond->lock held for writing by caller.
1233 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1236 slave->next->prev = slave->prev;
1239 slave->prev->next = slave->next;
1241 if (bond->first_slave == slave) { /* slave is the first slave */
1242 if (bond->slave_cnt > 1) { /* there are more slave */
1243 bond->first_slave = slave->next;
1245 bond->first_slave = NULL; /* slave was the last one */
1254 /*---------------------------------- IOCTL ----------------------------------*/
1256 static int bond_sethwaddr(struct net_device *bond_dev,
1257 struct net_device *slave_dev)
1259 pr_debug("bond_dev=%p\n", bond_dev);
1260 pr_debug("slave_dev=%p\n", slave_dev);
1261 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1262 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1266 #define BOND_VLAN_FEATURES \
1267 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1268 NETIF_F_HW_VLAN_FILTER)
1271 * Compute the common dev->feature set available to all slaves. Some
1272 * feature bits are managed elsewhere, so preserve those feature bits
1273 * on the master device.
1275 static int bond_compute_features(struct bonding *bond)
1277 struct slave *slave;
1278 struct net_device *bond_dev = bond->dev;
1279 unsigned long features = bond_dev->features;
1280 unsigned long vlan_features = 0;
1281 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1282 bond_dev->hard_header_len);
1285 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1286 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1288 if (!bond->first_slave)
1291 features &= ~NETIF_F_ONE_FOR_ALL;
1293 vlan_features = bond->first_slave->dev->vlan_features;
1294 bond_for_each_slave(bond, slave, i) {
1295 features = netdev_increment_features(features,
1296 slave->dev->features,
1297 NETIF_F_ONE_FOR_ALL);
1298 vlan_features = netdev_increment_features(vlan_features,
1299 slave->dev->vlan_features,
1300 NETIF_F_ONE_FOR_ALL);
1301 if (slave->dev->hard_header_len > max_hard_header_len)
1302 max_hard_header_len = slave->dev->hard_header_len;
1306 features |= (bond_dev->features & BOND_VLAN_FEATURES);
1307 bond_dev->features = netdev_fix_features(features, NULL);
1308 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
1309 bond_dev->hard_header_len = max_hard_header_len;
1314 static void bond_setup_by_slave(struct net_device *bond_dev,
1315 struct net_device *slave_dev)
1317 struct bonding *bond = netdev_priv(bond_dev);
1319 bond_dev->header_ops = slave_dev->header_ops;
1321 bond_dev->type = slave_dev->type;
1322 bond_dev->hard_header_len = slave_dev->hard_header_len;
1323 bond_dev->addr_len = slave_dev->addr_len;
1325 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1326 slave_dev->addr_len);
1327 bond->setup_by_slave = 1;
1330 /* enslave device <slave> to bond device <master> */
1331 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1333 struct bonding *bond = netdev_priv(bond_dev);
1334 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1335 struct slave *new_slave = NULL;
1336 struct netdev_hw_addr *ha;
1337 struct sockaddr addr;
1339 int old_features = bond_dev->features;
1342 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1343 slave_ops->ndo_do_ioctl == NULL) {
1344 pr_warning("%s: Warning: no link monitoring support for %s\n",
1345 bond_dev->name, slave_dev->name);
1348 /* bond must be initialized by bond_open() before enslaving */
1349 if (!(bond_dev->flags & IFF_UP)) {
1350 pr_warning("%s: master_dev is not up in bond_enslave\n",
1354 /* already enslaved */
1355 if (slave_dev->flags & IFF_SLAVE) {
1356 pr_debug("Error, Device was already enslaved\n");
1360 /* vlan challenged mutual exclusion */
1361 /* no need to lock since we're protected by rtnl_lock */
1362 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1363 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1364 if (!list_empty(&bond->vlan_list)) {
1365 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1366 bond_dev->name, slave_dev->name, bond_dev->name);
1369 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1370 bond_dev->name, slave_dev->name,
1371 slave_dev->name, bond_dev->name);
1372 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1375 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1376 if (bond->slave_cnt == 0) {
1377 /* First slave, and it is not VLAN challenged,
1378 * so remove the block of adding VLANs over the bond.
1380 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1385 * Old ifenslave binaries are no longer supported. These can
1386 * be identified with moderate accuracy by the state of the slave:
1387 * the current ifenslave will set the interface down prior to
1388 * enslaving it; the old ifenslave will not.
1390 if ((slave_dev->flags & IFF_UP)) {
1391 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1394 goto err_undo_flags;
1397 /* set bonding device ether type by slave - bonding netdevices are
1398 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1399 * there is a need to override some of the type dependent attribs/funcs.
1401 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1402 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1404 if (bond->slave_cnt == 0) {
1405 if (bond_dev->type != slave_dev->type) {
1406 pr_debug("%s: change device type from %d to %d\n",
1408 bond_dev->type, slave_dev->type);
1410 res = netdev_bonding_change(bond_dev,
1411 NETDEV_PRE_TYPE_CHANGE);
1412 res = notifier_to_errno(res);
1414 pr_err("%s: refused to change device type\n",
1417 goto err_undo_flags;
1420 /* Flush unicast and multicast addresses */
1421 dev_uc_flush(bond_dev);
1422 dev_mc_flush(bond_dev);
1424 if (slave_dev->type != ARPHRD_ETHER)
1425 bond_setup_by_slave(bond_dev, slave_dev);
1427 ether_setup(bond_dev);
1429 netdev_bonding_change(bond_dev,
1430 NETDEV_POST_TYPE_CHANGE);
1432 } else if (bond_dev->type != slave_dev->type) {
1433 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1435 slave_dev->type, bond_dev->type);
1437 goto err_undo_flags;
1440 if (slave_ops->ndo_set_mac_address == NULL) {
1441 if (bond->slave_cnt == 0) {
1442 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1444 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1445 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1446 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1449 goto err_undo_flags;
1453 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1456 goto err_undo_flags;
1459 /* save slave's original flags before calling
1460 * netdev_set_master and dev_open
1462 new_slave->original_flags = slave_dev->flags;
1465 * Save slave's original ("permanent") mac address for modes
1466 * that need it, and for restoring it upon release, and then
1467 * set it to the master's address
1469 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1471 if (!bond->params.fail_over_mac) {
1473 * Set slave to master's mac address. The application already
1474 * set the master's mac address to that of the first slave
1476 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1477 addr.sa_family = slave_dev->type;
1478 res = dev_set_mac_address(slave_dev, &addr);
1480 pr_debug("Error %d calling set_mac_address\n", res);
1485 res = netdev_set_master(slave_dev, bond_dev);
1487 pr_debug("Error %d calling netdev_set_master\n", res);
1488 goto err_restore_mac;
1490 /* open the slave since the application closed it */
1491 res = dev_open(slave_dev);
1493 pr_debug("Opening slave %s failed\n", slave_dev->name);
1494 goto err_unset_master;
1497 new_slave->dev = slave_dev;
1498 slave_dev->priv_flags |= IFF_BONDING;
1500 if (bond_is_lb(bond)) {
1501 /* bond_alb_init_slave() must be called before all other stages since
1502 * it might fail and we do not want to have to undo everything
1504 res = bond_alb_init_slave(bond, new_slave);
1509 /* If the mode USES_PRIMARY, then the new slave gets the
1510 * master's promisc (and mc) settings only if it becomes the
1511 * curr_active_slave, and that is taken care of later when calling
1512 * bond_change_active()
1514 if (!USES_PRIMARY(bond->params.mode)) {
1515 /* set promiscuity level to new slave */
1516 if (bond_dev->flags & IFF_PROMISC) {
1517 res = dev_set_promiscuity(slave_dev, 1);
1522 /* set allmulti level to new slave */
1523 if (bond_dev->flags & IFF_ALLMULTI) {
1524 res = dev_set_allmulti(slave_dev, 1);
1529 netif_addr_lock_bh(bond_dev);
1530 /* upload master's mc_list to new slave */
1531 netdev_for_each_mc_addr(ha, bond_dev)
1532 dev_mc_add(slave_dev, ha->addr);
1533 netif_addr_unlock_bh(bond_dev);
1536 if (bond->params.mode == BOND_MODE_8023AD) {
1537 /* add lacpdu mc addr to mc list */
1538 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1540 dev_mc_add(slave_dev, lacpdu_multicast);
1543 bond_add_vlans_on_slave(bond, slave_dev);
1545 write_lock_bh(&bond->lock);
1547 bond_attach_slave(bond, new_slave);
1549 new_slave->delay = 0;
1550 new_slave->link_failure_count = 0;
1552 bond_compute_features(bond);
1554 write_unlock_bh(&bond->lock);
1556 read_lock(&bond->lock);
1558 new_slave->last_arp_rx = jiffies;
1560 if (bond->params.miimon && !bond->params.use_carrier) {
1561 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1563 if ((link_reporting == -1) && !bond->params.arp_interval) {
1565 * miimon is set but a bonded network driver
1566 * does not support ETHTOOL/MII and
1567 * arp_interval is not set. Note: if
1568 * use_carrier is enabled, we will never go
1569 * here (because netif_carrier is always
1570 * supported); thus, we don't need to change
1571 * the messages for netif_carrier.
1573 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
1574 bond_dev->name, slave_dev->name);
1575 } else if (link_reporting == -1) {
1576 /* unable get link status using mii/ethtool */
1577 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1578 bond_dev->name, slave_dev->name);
1582 /* check for initial state */
1583 if (!bond->params.miimon ||
1584 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1585 if (bond->params.updelay) {
1586 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1587 new_slave->link = BOND_LINK_BACK;
1588 new_slave->delay = bond->params.updelay;
1590 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1591 new_slave->link = BOND_LINK_UP;
1593 new_slave->jiffies = jiffies;
1595 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1596 new_slave->link = BOND_LINK_DOWN;
1599 if (bond_update_speed_duplex(new_slave) &&
1600 (new_slave->link != BOND_LINK_DOWN)) {
1601 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1602 bond_dev->name, new_slave->dev->name);
1604 if (bond->params.mode == BOND_MODE_8023AD) {
1605 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1610 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1611 /* if there is a primary slave, remember it */
1612 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1613 bond->primary_slave = new_slave;
1614 bond->force_primary = true;
1618 write_lock_bh(&bond->curr_slave_lock);
1620 switch (bond->params.mode) {
1621 case BOND_MODE_ACTIVEBACKUP:
1622 bond_set_slave_inactive_flags(new_slave);
1623 bond_select_active_slave(bond);
1625 case BOND_MODE_8023AD:
1626 /* in 802.3ad mode, the internal mechanism
1627 * will activate the slaves in the selected
1630 bond_set_slave_inactive_flags(new_slave);
1631 /* if this is the first slave */
1632 if (bond->slave_cnt == 1) {
1633 SLAVE_AD_INFO(new_slave).id = 1;
1634 /* Initialize AD with the number of times that the AD timer is called in 1 second
1635 * can be called only after the mac address of the bond is set
1637 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1638 bond->params.lacp_fast);
1640 SLAVE_AD_INFO(new_slave).id =
1641 SLAVE_AD_INFO(new_slave->prev).id + 1;
1644 bond_3ad_bind_slave(new_slave);
1648 new_slave->state = BOND_STATE_ACTIVE;
1649 bond_set_slave_inactive_flags(new_slave);
1650 bond_select_active_slave(bond);
1653 pr_debug("This slave is always active in trunk mode\n");
1655 /* always active in trunk mode */
1656 new_slave->state = BOND_STATE_ACTIVE;
1658 /* In trunking mode there is little meaning to curr_active_slave
1659 * anyway (it holds no special properties of the bond device),
1660 * so we can change it without calling change_active_interface()
1662 if (!bond->curr_active_slave)
1663 bond->curr_active_slave = new_slave;
1666 } /* switch(bond_mode) */
1668 write_unlock_bh(&bond->curr_slave_lock);
1670 bond_set_carrier(bond);
1672 read_unlock(&bond->lock);
1674 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1678 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1679 bond_dev->name, slave_dev->name,
1680 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1681 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1683 /* enslave is successful */
1686 /* Undo stages on error */
1688 dev_close(slave_dev);
1691 netdev_set_master(slave_dev, NULL);
1694 if (!bond->params.fail_over_mac) {
1695 /* XXX TODO - fom follow mode needs to change master's
1696 * MAC if this slave's MAC is in use by the bond, or at
1697 * least print a warning.
1699 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1700 addr.sa_family = slave_dev->type;
1701 dev_set_mac_address(slave_dev, &addr);
1708 bond_dev->features = old_features;
1714 * Try to release the slave device <slave> from the bond device <master>
1715 * It is legal to access curr_active_slave without a lock because all the function
1718 * The rules for slave state should be:
1719 * for Active/Backup:
1720 * Active stays on all backups go down
1721 * for Bonded connections:
1722 * The first up interface should be left on and all others downed.
1724 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1726 struct bonding *bond = netdev_priv(bond_dev);
1727 struct slave *slave, *oldcurrent;
1728 struct sockaddr addr;
1730 /* slave is not a slave or master is not master of this slave */
1731 if (!(slave_dev->flags & IFF_SLAVE) ||
1732 (slave_dev->master != bond_dev)) {
1733 pr_err("%s: Error: cannot release %s.\n",
1734 bond_dev->name, slave_dev->name);
1738 write_lock_bh(&bond->lock);
1740 slave = bond_get_slave_by_dev(bond, slave_dev);
1742 /* not a slave of this bond */
1743 pr_info("%s: %s not enslaved\n",
1744 bond_dev->name, slave_dev->name);
1745 write_unlock_bh(&bond->lock);
1749 if (!bond->params.fail_over_mac) {
1750 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1751 bond->slave_cnt > 1)
1752 pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1753 bond_dev->name, slave_dev->name,
1755 bond_dev->name, slave_dev->name);
1758 /* Inform AD package of unbinding of slave. */
1759 if (bond->params.mode == BOND_MODE_8023AD) {
1760 /* must be called before the slave is
1761 * detached from the list
1763 bond_3ad_unbind_slave(slave);
1766 pr_info("%s: releasing %s interface %s\n",
1768 (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup",
1771 oldcurrent = bond->curr_active_slave;
1773 bond->current_arp_slave = NULL;
1775 /* release the slave from its bond */
1776 bond_detach_slave(bond, slave);
1778 bond_compute_features(bond);
1780 if (bond->primary_slave == slave)
1781 bond->primary_slave = NULL;
1783 if (oldcurrent == slave)
1784 bond_change_active_slave(bond, NULL);
1786 if (bond_is_lb(bond)) {
1787 /* Must be called only after the slave has been
1788 * detached from the list and the curr_active_slave
1789 * has been cleared (if our_slave == old_current),
1790 * but before a new active slave is selected.
1792 write_unlock_bh(&bond->lock);
1793 bond_alb_deinit_slave(bond, slave);
1794 write_lock_bh(&bond->lock);
1797 if (oldcurrent == slave) {
1799 * Note that we hold RTNL over this sequence, so there
1800 * is no concern that another slave add/remove event
1803 write_unlock_bh(&bond->lock);
1804 read_lock(&bond->lock);
1805 write_lock_bh(&bond->curr_slave_lock);
1807 bond_select_active_slave(bond);
1809 write_unlock_bh(&bond->curr_slave_lock);
1810 read_unlock(&bond->lock);
1811 write_lock_bh(&bond->lock);
1814 if (bond->slave_cnt == 0) {
1815 bond_set_carrier(bond);
1817 /* if the last slave was removed, zero the mac address
1818 * of the master so it will be set by the application
1819 * to the mac address of the first slave
1821 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1823 if (list_empty(&bond->vlan_list)) {
1824 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1826 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1827 bond_dev->name, bond_dev->name);
1828 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1831 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1832 !bond_has_challenged_slaves(bond)) {
1833 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1834 bond_dev->name, slave_dev->name, bond_dev->name);
1835 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1838 write_unlock_bh(&bond->lock);
1840 /* must do this from outside any spinlocks */
1841 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1843 bond_del_vlans_from_slave(bond, slave_dev);
1845 /* If the mode USES_PRIMARY, then we should only remove its
1846 * promisc and mc settings if it was the curr_active_slave, but that was
1847 * already taken care of above when we detached the slave
1849 if (!USES_PRIMARY(bond->params.mode)) {
1850 /* unset promiscuity level from slave */
1851 if (bond_dev->flags & IFF_PROMISC)
1852 dev_set_promiscuity(slave_dev, -1);
1854 /* unset allmulti level from slave */
1855 if (bond_dev->flags & IFF_ALLMULTI)
1856 dev_set_allmulti(slave_dev, -1);
1858 /* flush master's mc_list from slave */
1859 netif_addr_lock_bh(bond_dev);
1860 bond_mc_list_flush(bond_dev, slave_dev);
1861 netif_addr_unlock_bh(bond_dev);
1864 netdev_set_master(slave_dev, NULL);
1866 /* close slave before restoring its mac address */
1867 dev_close(slave_dev);
1869 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1870 /* restore original ("permanent") mac address */
1871 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1872 addr.sa_family = slave_dev->type;
1873 dev_set_mac_address(slave_dev, &addr);
1876 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1877 IFF_SLAVE_INACTIVE | IFF_BONDING |
1882 return 0; /* deletion OK */
1886 * First release a slave and than destroy the bond if no more slaves are left.
1887 * Must be under rtnl_lock when this function is called.
1889 int bond_release_and_destroy(struct net_device *bond_dev,
1890 struct net_device *slave_dev)
1892 struct bonding *bond = netdev_priv(bond_dev);
1895 ret = bond_release(bond_dev, slave_dev);
1896 if ((ret == 0) && (bond->slave_cnt == 0)) {
1897 pr_info("%s: destroying bond %s.\n",
1898 bond_dev->name, bond_dev->name);
1899 unregister_netdevice(bond_dev);
1905 * This function releases all slaves.
1907 static int bond_release_all(struct net_device *bond_dev)
1909 struct bonding *bond = netdev_priv(bond_dev);
1910 struct slave *slave;
1911 struct net_device *slave_dev;
1912 struct sockaddr addr;
1914 write_lock_bh(&bond->lock);
1916 netif_carrier_off(bond_dev);
1918 if (bond->slave_cnt == 0)
1921 bond->current_arp_slave = NULL;
1922 bond->primary_slave = NULL;
1923 bond_change_active_slave(bond, NULL);
1925 while ((slave = bond->first_slave) != NULL) {
1926 /* Inform AD package of unbinding of slave
1927 * before slave is detached from the list.
1929 if (bond->params.mode == BOND_MODE_8023AD)
1930 bond_3ad_unbind_slave(slave);
1932 slave_dev = slave->dev;
1933 bond_detach_slave(bond, slave);
1935 /* now that the slave is detached, unlock and perform
1936 * all the undo steps that should not be called from
1939 write_unlock_bh(&bond->lock);
1941 if (bond_is_lb(bond)) {
1942 /* must be called only after the slave
1943 * has been detached from the list
1945 bond_alb_deinit_slave(bond, slave);
1948 bond_compute_features(bond);
1950 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1951 bond_del_vlans_from_slave(bond, slave_dev);
1953 /* If the mode USES_PRIMARY, then we should only remove its
1954 * promisc and mc settings if it was the curr_active_slave, but that was
1955 * already taken care of above when we detached the slave
1957 if (!USES_PRIMARY(bond->params.mode)) {
1958 /* unset promiscuity level from slave */
1959 if (bond_dev->flags & IFF_PROMISC)
1960 dev_set_promiscuity(slave_dev, -1);
1962 /* unset allmulti level from slave */
1963 if (bond_dev->flags & IFF_ALLMULTI)
1964 dev_set_allmulti(slave_dev, -1);
1966 /* flush master's mc_list from slave */
1967 netif_addr_lock_bh(bond_dev);
1968 bond_mc_list_flush(bond_dev, slave_dev);
1969 netif_addr_unlock_bh(bond_dev);
1972 netdev_set_master(slave_dev, NULL);
1974 /* close slave before restoring its mac address */
1975 dev_close(slave_dev);
1977 if (!bond->params.fail_over_mac) {
1978 /* restore original ("permanent") mac address*/
1979 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1980 addr.sa_family = slave_dev->type;
1981 dev_set_mac_address(slave_dev, &addr);
1984 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1985 IFF_SLAVE_INACTIVE);
1989 /* re-acquire the lock before getting the next slave */
1990 write_lock_bh(&bond->lock);
1993 /* zero the mac address of the master so it will be
1994 * set by the application to the mac address of the
1997 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1999 if (list_empty(&bond->vlan_list))
2000 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2002 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2003 bond_dev->name, bond_dev->name);
2004 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2008 pr_info("%s: released all slaves\n", bond_dev->name);
2011 write_unlock_bh(&bond->lock);
2017 * This function changes the active slave to slave <slave_dev>.
2018 * It returns -EINVAL in the following cases.
2019 * - <slave_dev> is not found in the list.
2020 * - There is not active slave now.
2021 * - <slave_dev> is already active.
2022 * - The link state of <slave_dev> is not BOND_LINK_UP.
2023 * - <slave_dev> is not running.
2024 * In these cases, this function does nothing.
2025 * In the other cases, current_slave pointer is changed and 0 is returned.
2027 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2029 struct bonding *bond = netdev_priv(bond_dev);
2030 struct slave *old_active = NULL;
2031 struct slave *new_active = NULL;
2034 if (!USES_PRIMARY(bond->params.mode))
2037 /* Verify that master_dev is indeed the master of slave_dev */
2038 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
2041 read_lock(&bond->lock);
2043 read_lock(&bond->curr_slave_lock);
2044 old_active = bond->curr_active_slave;
2045 read_unlock(&bond->curr_slave_lock);
2047 new_active = bond_get_slave_by_dev(bond, slave_dev);
2050 * Changing to the current active: do nothing; return success.
2052 if (new_active && (new_active == old_active)) {
2053 read_unlock(&bond->lock);
2059 (new_active->link == BOND_LINK_UP) &&
2060 IS_UP(new_active->dev)) {
2061 write_lock_bh(&bond->curr_slave_lock);
2062 bond_change_active_slave(bond, new_active);
2063 write_unlock_bh(&bond->curr_slave_lock);
2067 read_unlock(&bond->lock);
2072 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2074 struct bonding *bond = netdev_priv(bond_dev);
2076 info->bond_mode = bond->params.mode;
2077 info->miimon = bond->params.miimon;
2079 read_lock(&bond->lock);
2080 info->num_slaves = bond->slave_cnt;
2081 read_unlock(&bond->lock);
2086 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2088 struct bonding *bond = netdev_priv(bond_dev);
2089 struct slave *slave;
2090 int i, res = -ENODEV;
2092 read_lock(&bond->lock);
2094 bond_for_each_slave(bond, slave, i) {
2095 if (i == (int)info->slave_id) {
2097 strcpy(info->slave_name, slave->dev->name);
2098 info->link = slave->link;
2099 info->state = slave->state;
2100 info->link_failure_count = slave->link_failure_count;
2105 read_unlock(&bond->lock);
2110 /*-------------------------------- Monitoring -------------------------------*/
2113 static int bond_miimon_inspect(struct bonding *bond)
2115 struct slave *slave;
2116 int i, link_state, commit = 0;
2117 bool ignore_updelay;
2119 ignore_updelay = !bond->curr_active_slave ? true : false;
2121 bond_for_each_slave(bond, slave, i) {
2122 slave->new_link = BOND_LINK_NOCHANGE;
2124 link_state = bond_check_dev_link(bond, slave->dev, 0);
2126 switch (slave->link) {
2131 slave->link = BOND_LINK_FAIL;
2132 slave->delay = bond->params.downdelay;
2134 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2136 (bond->params.mode ==
2137 BOND_MODE_ACTIVEBACKUP) ?
2138 ((slave->state == BOND_STATE_ACTIVE) ?
2139 "active " : "backup ") : "",
2141 bond->params.downdelay * bond->params.miimon);
2144 case BOND_LINK_FAIL:
2147 * recovered before downdelay expired
2149 slave->link = BOND_LINK_UP;
2150 slave->jiffies = jiffies;
2151 pr_info("%s: link status up again after %d ms for interface %s.\n",
2153 (bond->params.downdelay - slave->delay) *
2154 bond->params.miimon,
2159 if (slave->delay <= 0) {
2160 slave->new_link = BOND_LINK_DOWN;
2168 case BOND_LINK_DOWN:
2172 slave->link = BOND_LINK_BACK;
2173 slave->delay = bond->params.updelay;
2176 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2177 bond->dev->name, slave->dev->name,
2178 ignore_updelay ? 0 :
2179 bond->params.updelay *
2180 bond->params.miimon);
2183 case BOND_LINK_BACK:
2185 slave->link = BOND_LINK_DOWN;
2186 pr_info("%s: link status down again after %d ms for interface %s.\n",
2188 (bond->params.updelay - slave->delay) *
2189 bond->params.miimon,
2198 if (slave->delay <= 0) {
2199 slave->new_link = BOND_LINK_UP;
2201 ignore_updelay = false;
2213 static void bond_miimon_commit(struct bonding *bond)
2215 struct slave *slave;
2218 bond_for_each_slave(bond, slave, i) {
2219 switch (slave->new_link) {
2220 case BOND_LINK_NOCHANGE:
2224 slave->link = BOND_LINK_UP;
2225 slave->jiffies = jiffies;
2227 if (bond->params.mode == BOND_MODE_8023AD) {
2228 /* prevent it from being the active one */
2229 slave->state = BOND_STATE_BACKUP;
2230 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2231 /* make it immediately active */
2232 slave->state = BOND_STATE_ACTIVE;
2233 } else if (slave != bond->primary_slave) {
2234 /* prevent it from being the active one */
2235 slave->state = BOND_STATE_BACKUP;
2238 pr_info("%s: link status definitely up for interface %s.\n",
2239 bond->dev->name, slave->dev->name);
2241 /* notify ad that the link status has changed */
2242 if (bond->params.mode == BOND_MODE_8023AD)
2243 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2245 if (bond_is_lb(bond))
2246 bond_alb_handle_link_change(bond, slave,
2249 if (!bond->curr_active_slave ||
2250 (slave == bond->primary_slave))
2255 case BOND_LINK_DOWN:
2256 if (slave->link_failure_count < UINT_MAX)
2257 slave->link_failure_count++;
2259 slave->link = BOND_LINK_DOWN;
2261 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2262 bond->params.mode == BOND_MODE_8023AD)
2263 bond_set_slave_inactive_flags(slave);
2265 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2266 bond->dev->name, slave->dev->name);
2268 if (bond->params.mode == BOND_MODE_8023AD)
2269 bond_3ad_handle_link_change(slave,
2272 if (bond_is_lb(bond))
2273 bond_alb_handle_link_change(bond, slave,
2276 if (slave == bond->curr_active_slave)
2282 pr_err("%s: invalid new link %d on slave %s\n",
2283 bond->dev->name, slave->new_link,
2285 slave->new_link = BOND_LINK_NOCHANGE;
2292 write_lock_bh(&bond->curr_slave_lock);
2293 bond_select_active_slave(bond);
2294 write_unlock_bh(&bond->curr_slave_lock);
2297 bond_set_carrier(bond);
2303 * Really a wrapper that splits the mii monitor into two phases: an
2304 * inspection, then (if inspection indicates something needs to be done)
2305 * an acquisition of appropriate locks followed by a commit phase to
2306 * implement whatever link state changes are indicated.
2308 void bond_mii_monitor(struct work_struct *work)
2310 struct bonding *bond = container_of(work, struct bonding,
2313 read_lock(&bond->lock);
2314 if (bond->kill_timers)
2317 if (bond->slave_cnt == 0)
2320 if (bond->send_grat_arp) {
2321 read_lock(&bond->curr_slave_lock);
2322 bond_send_gratuitous_arp(bond);
2323 read_unlock(&bond->curr_slave_lock);
2326 if (bond->send_unsol_na) {
2327 read_lock(&bond->curr_slave_lock);
2328 bond_send_unsolicited_na(bond);
2329 read_unlock(&bond->curr_slave_lock);
2332 if (bond_miimon_inspect(bond)) {
2333 read_unlock(&bond->lock);
2335 read_lock(&bond->lock);
2337 bond_miimon_commit(bond);
2339 read_unlock(&bond->lock);
2340 rtnl_unlock(); /* might sleep, hold no other locks */
2341 read_lock(&bond->lock);
2345 if (bond->params.miimon)
2346 queue_delayed_work(bond->wq, &bond->mii_work,
2347 msecs_to_jiffies(bond->params.miimon));
2349 read_unlock(&bond->lock);
2352 static __be32 bond_glean_dev_ip(struct net_device *dev)
2354 struct in_device *idev;
2355 struct in_ifaddr *ifa;
2362 idev = __in_dev_get_rcu(dev);
2366 ifa = idev->ifa_list;
2370 addr = ifa->ifa_local;
2376 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2378 struct vlan_entry *vlan;
2380 if (ip == bond->master_ip)
2383 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2384 if (ip == vlan->vlan_ip)
2392 * We go to the (large) trouble of VLAN tagging ARP frames because
2393 * switches in VLAN mode (especially if ports are configured as
2394 * "native" to a VLAN) might not pass non-tagged frames.
2396 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2398 struct sk_buff *skb;
2400 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2401 slave_dev->name, dest_ip, src_ip, vlan_id);
2403 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2404 NULL, slave_dev->dev_addr, NULL);
2407 pr_err("ARP packet allocation failed\n");
2411 skb = vlan_put_tag(skb, vlan_id);
2413 pr_err("failed to insert VLAN tag\n");
2421 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2424 __be32 *targets = bond->params.arp_targets;
2425 struct vlan_entry *vlan;
2426 struct net_device *vlan_dev;
2430 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2433 pr_debug("basa: target %x\n", targets[i]);
2434 if (list_empty(&bond->vlan_list)) {
2435 pr_debug("basa: empty vlan: arp_send\n");
2436 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2437 bond->master_ip, 0);
2442 * If VLANs are configured, we do a route lookup to
2443 * determine which VLAN interface would be used, so we
2444 * can tag the ARP with the proper VLAN tag.
2446 memset(&fl, 0, sizeof(fl));
2447 fl.fl4_dst = targets[i];
2448 fl.fl4_tos = RTO_ONLINK;
2450 rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
2452 if (net_ratelimit()) {
2453 pr_warning("%s: no route to arp_ip_target %pI4\n",
2454 bond->dev->name, &fl.fl4_dst);
2460 * This target is not on a VLAN
2462 if (rt->u.dst.dev == bond->dev) {
2464 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2465 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2466 bond->master_ip, 0);
2471 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2472 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2473 if (vlan_dev == rt->u.dst.dev) {
2474 vlan_id = vlan->vlan_id;
2475 pr_debug("basa: vlan match on %s %d\n",
2476 vlan_dev->name, vlan_id);
2483 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2484 vlan->vlan_ip, vlan_id);
2488 if (net_ratelimit()) {
2489 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2490 bond->dev->name, &fl.fl4_dst,
2491 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2498 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2499 * for each VLAN above us.
2501 * Caller must hold curr_slave_lock for read or better
2503 static void bond_send_gratuitous_arp(struct bonding *bond)
2505 struct slave *slave = bond->curr_active_slave;
2506 struct vlan_entry *vlan;
2507 struct net_device *vlan_dev;
2509 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2510 bond->dev->name, slave ? slave->dev->name : "NULL");
2512 if (!slave || !bond->send_grat_arp ||
2513 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
2516 bond->send_grat_arp--;
2518 if (bond->master_ip) {
2519 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2520 bond->master_ip, 0);
2523 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2524 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2525 if (vlan->vlan_ip) {
2526 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2527 vlan->vlan_ip, vlan->vlan_id);
2532 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2535 __be32 *targets = bond->params.arp_targets;
2537 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2538 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2539 &sip, &tip, i, &targets[i],
2540 bond_has_this_ip(bond, tip));
2541 if (sip == targets[i]) {
2542 if (bond_has_this_ip(bond, tip))
2543 slave->last_arp_rx = jiffies;
2549 static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2552 struct slave *slave;
2553 struct bonding *bond;
2554 unsigned char *arp_ptr;
2557 if (dev->priv_flags & IFF_802_1Q_VLAN) {
2559 * When using VLANS and bonding, dev and oriv_dev may be
2560 * incorrect if the physical interface supports VLAN
2561 * acceleration. With this change ARP validation now
2562 * works for hosts only reachable on the VLAN interface.
2564 dev = vlan_dev_real_dev(dev);
2565 orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif);
2568 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2571 bond = netdev_priv(dev);
2572 read_lock(&bond->lock);
2574 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2575 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2576 orig_dev ? orig_dev->name : "NULL");
2578 slave = bond_get_slave_by_dev(bond, orig_dev);
2579 if (!slave || !slave_do_arp_validate(bond, slave))
2582 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
2586 if (arp->ar_hln != dev->addr_len ||
2587 skb->pkt_type == PACKET_OTHERHOST ||
2588 skb->pkt_type == PACKET_LOOPBACK ||
2589 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2590 arp->ar_pro != htons(ETH_P_IP) ||
2594 arp_ptr = (unsigned char *)(arp + 1);
2595 arp_ptr += dev->addr_len;
2596 memcpy(&sip, arp_ptr, 4);
2597 arp_ptr += 4 + dev->addr_len;
2598 memcpy(&tip, arp_ptr, 4);
2600 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2601 bond->dev->name, slave->dev->name, slave->state,
2602 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2606 * Backup slaves won't see the ARP reply, but do come through
2607 * here for each ARP probe (so we swap the sip/tip to validate
2608 * the probe). In a "redundant switch, common router" type of
2609 * configuration, the ARP probe will (hopefully) travel from
2610 * the active, through one switch, the router, then the other
2611 * switch before reaching the backup.
2613 if (slave->state == BOND_STATE_ACTIVE)
2614 bond_validate_arp(bond, slave, sip, tip);
2616 bond_validate_arp(bond, slave, tip, sip);
2619 read_unlock(&bond->lock);
2622 return NET_RX_SUCCESS;
2626 * this function is called regularly to monitor each slave's link
2627 * ensuring that traffic is being sent and received when arp monitoring
2628 * is used in load-balancing mode. if the adapter has been dormant, then an
2629 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2630 * arp monitoring in active backup mode.
2632 void bond_loadbalance_arp_mon(struct work_struct *work)
2634 struct bonding *bond = container_of(work, struct bonding,
2636 struct slave *slave, *oldcurrent;
2637 int do_failover = 0;
2641 read_lock(&bond->lock);
2643 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2645 if (bond->kill_timers)
2648 if (bond->slave_cnt == 0)
2651 read_lock(&bond->curr_slave_lock);
2652 oldcurrent = bond->curr_active_slave;
2653 read_unlock(&bond->curr_slave_lock);
2655 /* see if any of the previous devices are up now (i.e. they have
2656 * xmt and rcv traffic). the curr_active_slave does not come into
2657 * the picture unless it is null. also, slave->jiffies is not needed
2658 * here because we send an arp on each slave and give a slave as
2659 * long as it needs to get the tx/rx within the delta.
2660 * TODO: what about up/down delay in arp mode? it wasn't here before
2663 bond_for_each_slave(bond, slave, i) {
2664 if (slave->link != BOND_LINK_UP) {
2665 if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) &&
2666 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
2668 slave->link = BOND_LINK_UP;
2669 slave->state = BOND_STATE_ACTIVE;
2671 /* primary_slave has no meaning in round-robin
2672 * mode. the window of a slave being up and
2673 * curr_active_slave being null after enslaving
2677 pr_info("%s: link status definitely up for interface %s, ",
2682 pr_info("%s: interface %s is now up\n",
2688 /* slave->link == BOND_LINK_UP */
2690 /* not all switches will respond to an arp request
2691 * when the source ip is 0, so don't take the link down
2692 * if we don't know our ip yet
2694 if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) ||
2695 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
2697 slave->link = BOND_LINK_DOWN;
2698 slave->state = BOND_STATE_BACKUP;
2700 if (slave->link_failure_count < UINT_MAX)
2701 slave->link_failure_count++;
2703 pr_info("%s: interface %s is now down.\n",
2707 if (slave == oldcurrent)
2712 /* note: if switch is in round-robin mode, all links
2713 * must tx arp to ensure all links rx an arp - otherwise
2714 * links may oscillate or not come up at all; if switch is
2715 * in something like xor mode, there is nothing we can
2716 * do - all replies will be rx'ed on same link causing slaves
2717 * to be unstable during low/no traffic periods
2719 if (IS_UP(slave->dev))
2720 bond_arp_send_all(bond, slave);
2724 write_lock_bh(&bond->curr_slave_lock);
2726 bond_select_active_slave(bond);
2728 write_unlock_bh(&bond->curr_slave_lock);
2732 if (bond->params.arp_interval)
2733 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2735 read_unlock(&bond->lock);
2739 * Called to inspect slaves for active-backup mode ARP monitor link state
2740 * changes. Sets new_link in slaves to specify what action should take
2741 * place for the slave. Returns 0 if no changes are found, >0 if changes
2742 * to link states must be committed.
2744 * Called with bond->lock held for read.
2746 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2748 struct slave *slave;
2751 bond_for_each_slave(bond, slave, i) {
2752 slave->new_link = BOND_LINK_NOCHANGE;
2754 if (slave->link != BOND_LINK_UP) {
2755 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2757 slave->new_link = BOND_LINK_UP;
2765 * Give slaves 2*delta after being enslaved or made
2766 * active. This avoids bouncing, as the last receive
2767 * times need a full ARP monitor cycle to be updated.
2769 if (!time_after_eq(jiffies, slave->jiffies +
2770 2 * delta_in_ticks))
2774 * Backup slave is down if:
2775 * - No current_arp_slave AND
2776 * - more than 3*delta since last receive AND
2777 * - the bond has an IP address
2779 * Note: a non-null current_arp_slave indicates
2780 * the curr_active_slave went down and we are
2781 * searching for a new one; under this condition
2782 * we only take the curr_active_slave down - this
2783 * gives each slave a chance to tx/rx traffic
2784 * before being taken out
2786 if (slave->state == BOND_STATE_BACKUP &&
2787 !bond->current_arp_slave &&
2788 time_after(jiffies, slave_last_rx(bond, slave) +
2789 3 * delta_in_ticks)) {
2790 slave->new_link = BOND_LINK_DOWN;
2795 * Active slave is down if:
2796 * - more than 2*delta since transmitting OR
2797 * - (more than 2*delta since receive AND
2798 * the bond has an IP address)
2800 if ((slave->state == BOND_STATE_ACTIVE) &&
2801 (time_after_eq(jiffies, dev_trans_start(slave->dev) +
2802 2 * delta_in_ticks) ||
2803 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2804 + 2 * delta_in_ticks)))) {
2805 slave->new_link = BOND_LINK_DOWN;
2814 * Called to commit link state changes noted by inspection step of
2815 * active-backup mode ARP monitor.
2817 * Called with RTNL and bond->lock for read.
2819 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2821 struct slave *slave;
2824 bond_for_each_slave(bond, slave, i) {
2825 switch (slave->new_link) {
2826 case BOND_LINK_NOCHANGE:
2830 if ((!bond->curr_active_slave &&
2831 time_before_eq(jiffies,
2832 dev_trans_start(slave->dev) +
2834 bond->curr_active_slave != slave) {
2835 slave->link = BOND_LINK_UP;
2836 bond->current_arp_slave = NULL;
2838 pr_info("%s: link status definitely up for interface %s.\n",
2839 bond->dev->name, slave->dev->name);
2841 if (!bond->curr_active_slave ||
2842 (slave == bond->primary_slave))
2849 case BOND_LINK_DOWN:
2850 if (slave->link_failure_count < UINT_MAX)
2851 slave->link_failure_count++;
2853 slave->link = BOND_LINK_DOWN;
2854 bond_set_slave_inactive_flags(slave);
2856 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2857 bond->dev->name, slave->dev->name);
2859 if (slave == bond->curr_active_slave) {
2860 bond->current_arp_slave = NULL;
2867 pr_err("%s: impossible: new_link %d on slave %s\n",
2868 bond->dev->name, slave->new_link,
2875 write_lock_bh(&bond->curr_slave_lock);
2876 bond_select_active_slave(bond);
2877 write_unlock_bh(&bond->curr_slave_lock);
2880 bond_set_carrier(bond);
2884 * Send ARP probes for active-backup mode ARP monitor.
2886 * Called with bond->lock held for read.
2888 static void bond_ab_arp_probe(struct bonding *bond)
2890 struct slave *slave;
2893 read_lock(&bond->curr_slave_lock);
2895 if (bond->current_arp_slave && bond->curr_active_slave)
2896 pr_info("PROBE: c_arp %s && cas %s BAD\n",
2897 bond->current_arp_slave->dev->name,
2898 bond->curr_active_slave->dev->name);
2900 if (bond->curr_active_slave) {
2901 bond_arp_send_all(bond, bond->curr_active_slave);
2902 read_unlock(&bond->curr_slave_lock);
2906 read_unlock(&bond->curr_slave_lock);
2908 /* if we don't have a curr_active_slave, search for the next available
2909 * backup slave from the current_arp_slave and make it the candidate
2910 * for becoming the curr_active_slave
2913 if (!bond->current_arp_slave) {
2914 bond->current_arp_slave = bond->first_slave;
2915 if (!bond->current_arp_slave)
2919 bond_set_slave_inactive_flags(bond->current_arp_slave);
2921 /* search for next candidate */
2922 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
2923 if (IS_UP(slave->dev)) {
2924 slave->link = BOND_LINK_BACK;
2925 bond_set_slave_active_flags(slave);
2926 bond_arp_send_all(bond, slave);
2927 slave->jiffies = jiffies;
2928 bond->current_arp_slave = slave;
2932 /* if the link state is up at this point, we
2933 * mark it down - this can happen if we have
2934 * simultaneous link failures and
2935 * reselect_active_interface doesn't make this
2936 * one the current slave so it is still marked
2937 * up when it is actually down
2939 if (slave->link == BOND_LINK_UP) {
2940 slave->link = BOND_LINK_DOWN;
2941 if (slave->link_failure_count < UINT_MAX)
2942 slave->link_failure_count++;
2944 bond_set_slave_inactive_flags(slave);
2946 pr_info("%s: backup interface %s is now down.\n",
2947 bond->dev->name, slave->dev->name);
2952 void bond_activebackup_arp_mon(struct work_struct *work)
2954 struct bonding *bond = container_of(work, struct bonding,
2958 read_lock(&bond->lock);
2960 if (bond->kill_timers)
2963 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2965 if (bond->slave_cnt == 0)
2968 if (bond->send_grat_arp) {
2969 read_lock(&bond->curr_slave_lock);
2970 bond_send_gratuitous_arp(bond);
2971 read_unlock(&bond->curr_slave_lock);
2974 if (bond->send_unsol_na) {
2975 read_lock(&bond->curr_slave_lock);
2976 bond_send_unsolicited_na(bond);
2977 read_unlock(&bond->curr_slave_lock);
2980 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
2981 read_unlock(&bond->lock);
2983 read_lock(&bond->lock);
2985 bond_ab_arp_commit(bond, delta_in_ticks);
2987 read_unlock(&bond->lock);
2989 read_lock(&bond->lock);
2992 bond_ab_arp_probe(bond);
2995 if (bond->params.arp_interval)
2996 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2998 read_unlock(&bond->lock);
3001 /*------------------------------ proc/seq_file-------------------------------*/
3003 #ifdef CONFIG_PROC_FS
3005 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3006 __acquires(&dev_base_lock)
3007 __acquires(&bond->lock)
3009 struct bonding *bond = seq->private;
3011 struct slave *slave;
3014 /* make sure the bond won't be taken away */
3015 read_lock(&dev_base_lock);
3016 read_lock(&bond->lock);
3019 return SEQ_START_TOKEN;
3021 bond_for_each_slave(bond, slave, i) {
3029 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3031 struct bonding *bond = seq->private;
3032 struct slave *slave = v;
3035 if (v == SEQ_START_TOKEN)
3036 return bond->first_slave;
3038 slave = slave->next;
3040 return (slave == bond->first_slave) ? NULL : slave;
3043 static void bond_info_seq_stop(struct seq_file *seq, void *v)
3044 __releases(&bond->lock)
3045 __releases(&dev_base_lock)
3047 struct bonding *bond = seq->private;
3049 read_unlock(&bond->lock);
3050 read_unlock(&dev_base_lock);
3053 static void bond_info_show_master(struct seq_file *seq)
3055 struct bonding *bond = seq->private;
3059 read_lock(&bond->curr_slave_lock);
3060 curr = bond->curr_active_slave;
3061 read_unlock(&bond->curr_slave_lock);
3063 seq_printf(seq, "Bonding Mode: %s",
3064 bond_mode_name(bond->params.mode));
3066 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3067 bond->params.fail_over_mac)
3068 seq_printf(seq, " (fail_over_mac %s)",
3069 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
3071 seq_printf(seq, "\n");
3073 if (bond->params.mode == BOND_MODE_XOR ||
3074 bond->params.mode == BOND_MODE_8023AD) {
3075 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3076 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3077 bond->params.xmit_policy);
3080 if (USES_PRIMARY(bond->params.mode)) {
3081 seq_printf(seq, "Primary Slave: %s",
3082 (bond->primary_slave) ?
3083 bond->primary_slave->dev->name : "None");
3084 if (bond->primary_slave)
3085 seq_printf(seq, " (primary_reselect %s)",
3086 pri_reselect_tbl[bond->params.primary_reselect].modename);
3088 seq_printf(seq, "\nCurrently Active Slave: %s\n",
3089 (curr) ? curr->dev->name : "None");
3092 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3094 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3095 seq_printf(seq, "Up Delay (ms): %d\n",
3096 bond->params.updelay * bond->params.miimon);
3097 seq_printf(seq, "Down Delay (ms): %d\n",
3098 bond->params.downdelay * bond->params.miimon);
3101 /* ARP information */
3102 if (bond->params.arp_interval > 0) {
3104 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3105 bond->params.arp_interval);
3107 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3109 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
3110 if (!bond->params.arp_targets[i])
3113 seq_printf(seq, ",");
3114 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
3117 seq_printf(seq, "\n");
3120 if (bond->params.mode == BOND_MODE_8023AD) {
3121 struct ad_info ad_info;
3123 seq_puts(seq, "\n802.3ad info\n");
3124 seq_printf(seq, "LACP rate: %s\n",
3125 (bond->params.lacp_fast) ? "fast" : "slow");
3126 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3127 ad_select_tbl[bond->params.ad_select].modename);
3129 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3130 seq_printf(seq, "bond %s has no active aggregator\n",
3133 seq_printf(seq, "Active Aggregator Info:\n");
3135 seq_printf(seq, "\tAggregator ID: %d\n",
3136 ad_info.aggregator_id);
3137 seq_printf(seq, "\tNumber of ports: %d\n",
3139 seq_printf(seq, "\tActor Key: %d\n",
3141 seq_printf(seq, "\tPartner Key: %d\n",
3142 ad_info.partner_key);
3143 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3144 ad_info.partner_system);
3149 static void bond_info_show_slave(struct seq_file *seq,
3150 const struct slave *slave)
3152 struct bonding *bond = seq->private;
3154 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3155 seq_printf(seq, "MII Status: %s\n",
3156 (slave->link == BOND_LINK_UP) ? "up" : "down");
3157 seq_printf(seq, "Link Failure Count: %u\n",
3158 slave->link_failure_count);
3160 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
3162 if (bond->params.mode == BOND_MODE_8023AD) {
3163 const struct aggregator *agg
3164 = SLAVE_AD_INFO(slave).port.aggregator;
3167 seq_printf(seq, "Aggregator ID: %d\n",
3168 agg->aggregator_identifier);
3170 seq_puts(seq, "Aggregator ID: N/A\n");
3174 static int bond_info_seq_show(struct seq_file *seq, void *v)
3176 if (v == SEQ_START_TOKEN) {
3177 seq_printf(seq, "%s\n", version);
3178 bond_info_show_master(seq);
3180 bond_info_show_slave(seq, v);
3185 static const struct seq_operations bond_info_seq_ops = {
3186 .start = bond_info_seq_start,
3187 .next = bond_info_seq_next,
3188 .stop = bond_info_seq_stop,
3189 .show = bond_info_seq_show,
3192 static int bond_info_open(struct inode *inode, struct file *file)
3194 struct seq_file *seq;
3195 struct proc_dir_entry *proc;
3198 res = seq_open(file, &bond_info_seq_ops);
3200 /* recover the pointer buried in proc_dir_entry data */
3201 seq = file->private_data;
3203 seq->private = proc->data;
3209 static const struct file_operations bond_info_fops = {
3210 .owner = THIS_MODULE,
3211 .open = bond_info_open,
3213 .llseek = seq_lseek,
3214 .release = seq_release,
3217 static void bond_create_proc_entry(struct bonding *bond)
3219 struct net_device *bond_dev = bond->dev;
3220 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3223 bond->proc_entry = proc_create_data(bond_dev->name,
3224 S_IRUGO, bn->proc_dir,
3225 &bond_info_fops, bond);
3226 if (bond->proc_entry == NULL)
3227 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3228 DRV_NAME, bond_dev->name);
3230 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3234 static void bond_remove_proc_entry(struct bonding *bond)
3236 struct net_device *bond_dev = bond->dev;
3237 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3239 if (bn->proc_dir && bond->proc_entry) {
3240 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
3241 memset(bond->proc_file_name, 0, IFNAMSIZ);
3242 bond->proc_entry = NULL;
3246 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3247 * Caller must hold rtnl_lock.
3249 static void __net_init bond_create_proc_dir(struct bond_net *bn)
3251 if (!bn->proc_dir) {
3252 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
3254 pr_warning("Warning: cannot create /proc/net/%s\n",
3259 /* Destroy the bonding directory under /proc/net, if empty.
3260 * Caller must hold rtnl_lock.
3262 static void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
3265 remove_proc_entry(DRV_NAME, bn->net->proc_net);
3266 bn->proc_dir = NULL;
3270 #else /* !CONFIG_PROC_FS */
3272 static void bond_create_proc_entry(struct bonding *bond)
3276 static void bond_remove_proc_entry(struct bonding *bond)
3280 static inline void bond_create_proc_dir(struct bond_net *bn)
3284 static inline void bond_destroy_proc_dir(struct bond_net *bn)
3288 #endif /* CONFIG_PROC_FS */
3291 /*-------------------------- netdev event handling --------------------------*/
3294 * Change device name
3296 static int bond_event_changename(struct bonding *bond)
3298 bond_remove_proc_entry(bond);
3299 bond_create_proc_entry(bond);
3304 static int bond_master_netdev_event(unsigned long event,
3305 struct net_device *bond_dev)
3307 struct bonding *event_bond = netdev_priv(bond_dev);
3310 case NETDEV_CHANGENAME:
3311 return bond_event_changename(event_bond);
3319 static int bond_slave_netdev_event(unsigned long event,
3320 struct net_device *slave_dev)
3322 struct net_device *bond_dev = slave_dev->master;
3323 struct bonding *bond = netdev_priv(bond_dev);
3326 case NETDEV_UNREGISTER:
3328 if (bond->setup_by_slave)
3329 bond_release_and_destroy(bond_dev, slave_dev);
3331 bond_release(bond_dev, slave_dev);
3335 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3336 struct slave *slave;
3338 slave = bond_get_slave_by_dev(bond, slave_dev);
3340 u16 old_speed = slave->speed;
3341 u16 old_duplex = slave->duplex;
3343 bond_update_speed_duplex(slave);
3345 if (bond_is_lb(bond))
3348 if (old_speed != slave->speed)
3349 bond_3ad_adapter_speed_changed(slave);
3350 if (old_duplex != slave->duplex)
3351 bond_3ad_adapter_duplex_changed(slave);
3358 * ... Or is it this?
3361 case NETDEV_CHANGEMTU:
3363 * TODO: Should slaves be allowed to
3364 * independently alter their MTU? For
3365 * an active-backup bond, slaves need
3366 * not be the same type of device, so
3367 * MTUs may vary. For other modes,
3368 * slaves arguably should have the
3369 * same MTUs. To do this, we'd need to
3370 * take over the slave's change_mtu
3371 * function for the duration of their
3375 case NETDEV_CHANGENAME:
3377 * TODO: handle changing the primary's name
3380 case NETDEV_FEAT_CHANGE:
3381 bond_compute_features(bond);
3391 * bond_netdev_event: handle netdev notifier chain events.
3393 * This function receives events for the netdev chain. The caller (an
3394 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3395 * locks for us to safely manipulate the slave devices (RTNL lock,
3398 static int bond_netdev_event(struct notifier_block *this,
3399 unsigned long event, void *ptr)
3401 struct net_device *event_dev = (struct net_device *)ptr;
3403 pr_debug("event_dev: %s, event: %lx\n",
3404 event_dev ? event_dev->name : "None",
3407 if (!(event_dev->priv_flags & IFF_BONDING))
3410 if (event_dev->flags & IFF_MASTER) {
3411 pr_debug("IFF_MASTER\n");
3412 return bond_master_netdev_event(event, event_dev);
3415 if (event_dev->flags & IFF_SLAVE) {
3416 pr_debug("IFF_SLAVE\n");
3417 return bond_slave_netdev_event(event, event_dev);
3424 * bond_inetaddr_event: handle inetaddr notifier chain events.
3426 * We keep track of device IPs primarily to use as source addresses in
3427 * ARP monitor probes (rather than spewing out broadcasts all the time).
3429 * We track one IP for the main device (if it has one), plus one per VLAN.
3431 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3433 struct in_ifaddr *ifa = ptr;
3434 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3435 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
3436 struct bonding *bond;
3437 struct vlan_entry *vlan;
3439 list_for_each_entry(bond, &bn->dev_list, bond_list) {
3440 if (bond->dev == event_dev) {
3443 bond->master_ip = ifa->ifa_local;
3446 bond->master_ip = bond_glean_dev_ip(bond->dev);
3453 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3454 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
3455 if (vlan_dev == event_dev) {
3458 vlan->vlan_ip = ifa->ifa_local;
3462 bond_glean_dev_ip(vlan_dev);
3473 static struct notifier_block bond_netdev_notifier = {
3474 .notifier_call = bond_netdev_event,
3477 static struct notifier_block bond_inetaddr_notifier = {
3478 .notifier_call = bond_inetaddr_event,
3481 /*-------------------------- Packet type handling ---------------------------*/
3483 /* register to receive lacpdus on a bond */
3484 static void bond_register_lacpdu(struct bonding *bond)
3486 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3488 /* initialize packet type */
3489 pk_type->type = PKT_TYPE_LACPDU;
3490 pk_type->dev = bond->dev;
3491 pk_type->func = bond_3ad_lacpdu_recv;
3493 dev_add_pack(pk_type);
3496 /* unregister to receive lacpdus on a bond */
3497 static void bond_unregister_lacpdu(struct bonding *bond)
3499 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3502 void bond_register_arp(struct bonding *bond)
3504 struct packet_type *pt = &bond->arp_mon_pt;
3509 pt->type = htons(ETH_P_ARP);
3510 pt->dev = bond->dev;
3511 pt->func = bond_arp_rcv;
3515 void bond_unregister_arp(struct bonding *bond)
3517 struct packet_type *pt = &bond->arp_mon_pt;
3519 dev_remove_pack(pt);
3523 /*---------------------------- Hashing Policies -----------------------------*/
3526 * Hash for the output device based upon layer 2 and layer 3 data. If
3527 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3529 static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
3531 struct ethhdr *data = (struct ethhdr *)skb->data;
3532 struct iphdr *iph = ip_hdr(skb);
3534 if (skb->protocol == htons(ETH_P_IP)) {
3535 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3536 (data->h_dest[5] ^ data->h_source[5])) % count;
3539 return (data->h_dest[5] ^ data->h_source[5]) % count;
3543 * Hash for the output device based upon layer 3 and layer 4 data. If
3544 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3545 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3547 static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
3549 struct ethhdr *data = (struct ethhdr *)skb->data;
3550 struct iphdr *iph = ip_hdr(skb);
3551 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3554 if (skb->protocol == htons(ETH_P_IP)) {
3555 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
3556 (iph->protocol == IPPROTO_TCP ||
3557 iph->protocol == IPPROTO_UDP)) {
3558 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3560 return (layer4_xor ^
3561 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3565 return (data->h_dest[5] ^ data->h_source[5]) % count;
3569 * Hash for the output device based upon layer 2 data
3571 static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
3573 struct ethhdr *data = (struct ethhdr *)skb->data;
3575 return (data->h_dest[5] ^ data->h_source[5]) % count;
3578 /*-------------------------- Device entry points ----------------------------*/
3580 static int bond_open(struct net_device *bond_dev)
3582 struct bonding *bond = netdev_priv(bond_dev);
3584 bond->kill_timers = 0;
3586 if (bond_is_lb(bond)) {
3587 /* bond_alb_initialize must be called before the timer
3590 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3591 /* something went wrong - fail the open operation */
3595 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3596 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3599 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3600 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3601 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3604 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3605 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3606 INIT_DELAYED_WORK(&bond->arp_work,
3607 bond_activebackup_arp_mon);
3609 INIT_DELAYED_WORK(&bond->arp_work,
3610 bond_loadbalance_arp_mon);
3612 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3613 if (bond->params.arp_validate)
3614 bond_register_arp(bond);
3617 if (bond->params.mode == BOND_MODE_8023AD) {
3618 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3619 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3620 /* register to receive LACPDUs */
3621 bond_register_lacpdu(bond);
3622 bond_3ad_initiate_agg_selection(bond, 1);
3628 static int bond_close(struct net_device *bond_dev)
3630 struct bonding *bond = netdev_priv(bond_dev);
3632 if (bond->params.mode == BOND_MODE_8023AD) {
3633 /* Unregister the receive of LACPDUs */
3634 bond_unregister_lacpdu(bond);
3637 if (bond->params.arp_validate)
3638 bond_unregister_arp(bond);
3640 write_lock_bh(&bond->lock);
3642 bond->send_grat_arp = 0;
3643 bond->send_unsol_na = 0;
3645 /* signal timers not to re-arm */
3646 bond->kill_timers = 1;
3648 write_unlock_bh(&bond->lock);
3650 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3651 cancel_delayed_work(&bond->mii_work);
3654 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3655 cancel_delayed_work(&bond->arp_work);
3658 switch (bond->params.mode) {
3659 case BOND_MODE_8023AD:
3660 cancel_delayed_work(&bond->ad_work);
3664 cancel_delayed_work(&bond->alb_work);
3671 if (bond_is_lb(bond)) {
3672 /* Must be called only after all
3673 * slaves have been released
3675 bond_alb_deinitialize(bond);
3681 static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3683 struct bonding *bond = netdev_priv(bond_dev);
3684 struct net_device_stats *stats = &bond_dev->stats;
3685 struct net_device_stats local_stats;
3686 struct slave *slave;
3689 memset(&local_stats, 0, sizeof(struct net_device_stats));
3691 read_lock_bh(&bond->lock);
3693 bond_for_each_slave(bond, slave, i) {
3694 const struct net_device_stats *sstats = dev_get_stats(slave->dev);
3696 local_stats.rx_packets += sstats->rx_packets;
3697 local_stats.rx_bytes += sstats->rx_bytes;
3698 local_stats.rx_errors += sstats->rx_errors;
3699 local_stats.rx_dropped += sstats->rx_dropped;
3701 local_stats.tx_packets += sstats->tx_packets;
3702 local_stats.tx_bytes += sstats->tx_bytes;
3703 local_stats.tx_errors += sstats->tx_errors;
3704 local_stats.tx_dropped += sstats->tx_dropped;
3706 local_stats.multicast += sstats->multicast;
3707 local_stats.collisions += sstats->collisions;
3709 local_stats.rx_length_errors += sstats->rx_length_errors;
3710 local_stats.rx_over_errors += sstats->rx_over_errors;
3711 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3712 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3713 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3714 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3716 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3717 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3718 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3719 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3720 local_stats.tx_window_errors += sstats->tx_window_errors;
3723 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
3725 read_unlock_bh(&bond->lock);
3730 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3732 struct net_device *slave_dev = NULL;
3733 struct ifbond k_binfo;
3734 struct ifbond __user *u_binfo = NULL;
3735 struct ifslave k_sinfo;
3736 struct ifslave __user *u_sinfo = NULL;
3737 struct mii_ioctl_data *mii = NULL;
3740 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
3752 * We do this again just in case we were called by SIOCGMIIREG
3753 * instead of SIOCGMIIPHY.
3760 if (mii->reg_num == 1) {
3761 struct bonding *bond = netdev_priv(bond_dev);
3763 read_lock(&bond->lock);
3764 read_lock(&bond->curr_slave_lock);
3765 if (netif_carrier_ok(bond->dev))
3766 mii->val_out = BMSR_LSTATUS;
3768 read_unlock(&bond->curr_slave_lock);
3769 read_unlock(&bond->lock);
3773 case BOND_INFO_QUERY_OLD:
3774 case SIOCBONDINFOQUERY:
3775 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3777 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3780 res = bond_info_query(bond_dev, &k_binfo);
3782 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3786 case BOND_SLAVE_INFO_QUERY_OLD:
3787 case SIOCBONDSLAVEINFOQUERY:
3788 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3790 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3793 res = bond_slave_info_query(bond_dev, &k_sinfo);
3795 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3804 if (!capable(CAP_NET_ADMIN))
3807 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
3809 pr_debug("slave_dev=%p:\n", slave_dev);
3814 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
3816 case BOND_ENSLAVE_OLD:
3817 case SIOCBONDENSLAVE:
3818 res = bond_enslave(bond_dev, slave_dev);
3820 case BOND_RELEASE_OLD:
3821 case SIOCBONDRELEASE:
3822 res = bond_release(bond_dev, slave_dev);
3824 case BOND_SETHWADDR_OLD:
3825 case SIOCBONDSETHWADDR:
3826 res = bond_sethwaddr(bond_dev, slave_dev);
3828 case BOND_CHANGE_ACTIVE_OLD:
3829 case SIOCBONDCHANGEACTIVE:
3830 res = bond_ioctl_change_active(bond_dev, slave_dev);
3842 static bool bond_addr_in_mc_list(unsigned char *addr,
3843 struct netdev_hw_addr_list *list,
3846 struct netdev_hw_addr *ha;
3848 netdev_hw_addr_list_for_each(ha, list)
3849 if (!memcmp(ha->addr, addr, addrlen))
3855 static void bond_set_multicast_list(struct net_device *bond_dev)
3857 struct bonding *bond = netdev_priv(bond_dev);
3858 struct netdev_hw_addr *ha;
3862 * Do promisc before checking multicast_mode
3864 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
3866 * FIXME: Need to handle the error when one of the multi-slaves
3869 bond_set_promiscuity(bond, 1);
3872 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
3873 bond_set_promiscuity(bond, -1);
3876 /* set allmulti flag to slaves */
3877 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
3879 * FIXME: Need to handle the error when one of the multi-slaves
3882 bond_set_allmulti(bond, 1);
3885 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
3886 bond_set_allmulti(bond, -1);
3889 read_lock(&bond->lock);
3891 bond->flags = bond_dev->flags;
3893 /* looking for addresses to add to slaves' mc list */
3894 netdev_for_each_mc_addr(ha, bond_dev) {
3895 found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
3896 bond_dev->addr_len);
3898 bond_mc_add(bond, ha->addr);
3901 /* looking for addresses to delete from slaves' list */
3902 netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
3903 found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
3904 bond_dev->addr_len);
3906 bond_mc_del(bond, ha->addr);
3909 /* save master's multicast list */
3910 __hw_addr_flush(&bond->mc_list);
3911 __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
3912 bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
3914 read_unlock(&bond->lock);
3917 static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
3919 struct bonding *bond = netdev_priv(dev);
3920 struct slave *slave = bond->first_slave;
3923 const struct net_device_ops *slave_ops
3924 = slave->dev->netdev_ops;
3925 if (slave_ops->ndo_neigh_setup)
3926 return slave_ops->ndo_neigh_setup(slave->dev, parms);
3932 * Change the MTU of all of a master's slaves to match the master
3934 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3936 struct bonding *bond = netdev_priv(bond_dev);
3937 struct slave *slave, *stop_at;
3941 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
3942 (bond_dev ? bond_dev->name : "None"), new_mtu);
3944 /* Can't hold bond->lock with bh disabled here since
3945 * some base drivers panic. On the other hand we can't
3946 * hold bond->lock without bh disabled because we'll
3947 * deadlock. The only solution is to rely on the fact
3948 * that we're under rtnl_lock here, and the slaves
3949 * list won't change. This doesn't solve the problem
3950 * of setting the slave's MTU while it is
3951 * transmitting, but the assumption is that the base
3952 * driver can handle that.
3954 * TODO: figure out a way to safely iterate the slaves
3955 * list, but without holding a lock around the actual
3956 * call to the base driver.
3959 bond_for_each_slave(bond, slave, i) {
3960 pr_debug("s %p s->p %p c_m %p\n",
3963 slave->dev->netdev_ops->ndo_change_mtu);
3965 res = dev_set_mtu(slave->dev, new_mtu);
3968 /* If we failed to set the slave's mtu to the new value
3969 * we must abort the operation even in ACTIVE_BACKUP
3970 * mode, because if we allow the backup slaves to have
3971 * different mtu values than the active slave we'll
3972 * need to change their mtu when doing a failover. That
3973 * means changing their mtu from timer context, which
3974 * is probably not a good idea.
3976 pr_debug("err %d %s\n", res, slave->dev->name);
3981 bond_dev->mtu = new_mtu;
3986 /* unwind from head to the slave that failed */
3988 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3991 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3993 pr_debug("unwind err %d dev %s\n",
3994 tmp_res, slave->dev->name);
4004 * Note that many devices must be down to change the HW address, and
4005 * downing the master releases all slaves. We can make bonds full of
4006 * bonding devices to test this, however.
4008 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4010 struct bonding *bond = netdev_priv(bond_dev);
4011 struct sockaddr *sa = addr, tmp_sa;
4012 struct slave *slave, *stop_at;
4016 if (bond->params.mode == BOND_MODE_ALB)
4017 return bond_alb_set_mac_address(bond_dev, addr);
4020 pr_debug("bond=%p, name=%s\n",
4021 bond, bond_dev ? bond_dev->name : "None");
4024 * If fail_over_mac is set to active, do nothing and return
4025 * success. Returning an error causes ifenslave to fail.
4027 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
4030 if (!is_valid_ether_addr(sa->sa_data))
4031 return -EADDRNOTAVAIL;
4033 /* Can't hold bond->lock with bh disabled here since
4034 * some base drivers panic. On the other hand we can't
4035 * hold bond->lock without bh disabled because we'll
4036 * deadlock. The only solution is to rely on the fact
4037 * that we're under rtnl_lock here, and the slaves
4038 * list won't change. This doesn't solve the problem
4039 * of setting the slave's hw address while it is
4040 * transmitting, but the assumption is that the base
4041 * driver can handle that.
4043 * TODO: figure out a way to safely iterate the slaves
4044 * list, but without holding a lock around the actual
4045 * call to the base driver.
4048 bond_for_each_slave(bond, slave, i) {
4049 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
4050 pr_debug("slave %p %s\n", slave, slave->dev->name);
4052 if (slave_ops->ndo_set_mac_address == NULL) {
4054 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
4058 res = dev_set_mac_address(slave->dev, addr);
4060 /* TODO: consider downing the slave
4062 * User should expect communications
4063 * breakage anyway until ARP finish
4066 pr_debug("err %d %s\n", res, slave->dev->name);
4072 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4076 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4077 tmp_sa.sa_family = bond_dev->type;
4079 /* unwind from head to the slave that failed */
4081 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4084 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4086 pr_debug("unwind err %d dev %s\n",
4087 tmp_res, slave->dev->name);
4094 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4096 struct bonding *bond = netdev_priv(bond_dev);
4097 struct slave *slave, *start_at;
4098 int i, slave_no, res = 1;
4100 read_lock(&bond->lock);
4102 if (!BOND_IS_OK(bond))
4106 * Concurrent TX may collide on rr_tx_counter; we accept that
4107 * as being rare enough not to justify using an atomic op here
4109 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4111 bond_for_each_slave(bond, slave, i) {
4118 bond_for_each_slave_from(bond, slave, i, start_at) {
4119 if (IS_UP(slave->dev) &&
4120 (slave->link == BOND_LINK_UP) &&
4121 (slave->state == BOND_STATE_ACTIVE)) {
4122 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4129 /* no suitable interface, frame not sent */
4132 read_unlock(&bond->lock);
4133 return NETDEV_TX_OK;
4138 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4139 * the bond has a usable interface.
4141 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4143 struct bonding *bond = netdev_priv(bond_dev);
4146 read_lock(&bond->lock);
4147 read_lock(&bond->curr_slave_lock);
4149 if (!BOND_IS_OK(bond))
4152 if (!bond->curr_active_slave)
4155 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4159 /* no suitable interface, frame not sent */
4162 read_unlock(&bond->curr_slave_lock);
4163 read_unlock(&bond->lock);
4164 return NETDEV_TX_OK;
4168 * In bond_xmit_xor() , we determine the output device by using a pre-
4169 * determined xmit_hash_policy(), If the selected device is not enabled,
4170 * find the next active slave.
4172 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4174 struct bonding *bond = netdev_priv(bond_dev);
4175 struct slave *slave, *start_at;
4180 read_lock(&bond->lock);
4182 if (!BOND_IS_OK(bond))
4185 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
4187 bond_for_each_slave(bond, slave, i) {
4195 bond_for_each_slave_from(bond, slave, i, start_at) {
4196 if (IS_UP(slave->dev) &&
4197 (slave->link == BOND_LINK_UP) &&
4198 (slave->state == BOND_STATE_ACTIVE)) {
4199 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4206 /* no suitable interface, frame not sent */
4209 read_unlock(&bond->lock);
4210 return NETDEV_TX_OK;
4214 * in broadcast mode, we send everything to all usable interfaces.
4216 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4218 struct bonding *bond = netdev_priv(bond_dev);
4219 struct slave *slave, *start_at;
4220 struct net_device *tx_dev = NULL;
4224 read_lock(&bond->lock);
4226 if (!BOND_IS_OK(bond))
4229 read_lock(&bond->curr_slave_lock);
4230 start_at = bond->curr_active_slave;
4231 read_unlock(&bond->curr_slave_lock);
4236 bond_for_each_slave_from(bond, slave, i, start_at) {
4237 if (IS_UP(slave->dev) &&
4238 (slave->link == BOND_LINK_UP) &&
4239 (slave->state == BOND_STATE_ACTIVE)) {
4241 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4243 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4248 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4250 dev_kfree_skb(skb2);
4254 tx_dev = slave->dev;
4259 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4263 /* no suitable interface, frame not sent */
4266 /* frame sent to all suitable interfaces */
4267 read_unlock(&bond->lock);
4268 return NETDEV_TX_OK;
4271 /*------------------------- Device initialization ---------------------------*/
4273 static void bond_set_xmit_hash_policy(struct bonding *bond)
4275 switch (bond->params.xmit_policy) {
4276 case BOND_XMIT_POLICY_LAYER23:
4277 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4279 case BOND_XMIT_POLICY_LAYER34:
4280 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4282 case BOND_XMIT_POLICY_LAYER2:
4284 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4289 static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4291 const struct bonding *bond = netdev_priv(dev);
4293 switch (bond->params.mode) {
4294 case BOND_MODE_ROUNDROBIN:
4295 return bond_xmit_roundrobin(skb, dev);
4296 case BOND_MODE_ACTIVEBACKUP:
4297 return bond_xmit_activebackup(skb, dev);
4299 return bond_xmit_xor(skb, dev);
4300 case BOND_MODE_BROADCAST:
4301 return bond_xmit_broadcast(skb, dev);
4302 case BOND_MODE_8023AD:
4303 return bond_3ad_xmit_xor(skb, dev);
4306 return bond_alb_xmit(skb, dev);
4308 /* Should never happen, mode already checked */
4309 pr_err("%s: Error: Unknown bonding mode %d\n",
4310 dev->name, bond->params.mode);
4313 return NETDEV_TX_OK;
4319 * set bond mode specific net device operations
4321 void bond_set_mode_ops(struct bonding *bond, int mode)
4323 struct net_device *bond_dev = bond->dev;
4326 case BOND_MODE_ROUNDROBIN:
4328 case BOND_MODE_ACTIVEBACKUP:
4331 bond_set_xmit_hash_policy(bond);
4333 case BOND_MODE_BROADCAST:
4335 case BOND_MODE_8023AD:
4336 bond_set_master_3ad_flags(bond);
4337 bond_set_xmit_hash_policy(bond);
4340 bond_set_master_alb_flags(bond);
4345 /* Should never happen, mode already checked */
4346 pr_err("%s: Error: Unknown bonding mode %d\n",
4347 bond_dev->name, mode);
4352 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4353 struct ethtool_drvinfo *drvinfo)
4355 strncpy(drvinfo->driver, DRV_NAME, 32);
4356 strncpy(drvinfo->version, DRV_VERSION, 32);
4357 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4360 static const struct ethtool_ops bond_ethtool_ops = {
4361 .get_drvinfo = bond_ethtool_get_drvinfo,
4362 .get_link = ethtool_op_get_link,
4363 .get_tx_csum = ethtool_op_get_tx_csum,
4364 .get_sg = ethtool_op_get_sg,
4365 .get_tso = ethtool_op_get_tso,
4366 .get_ufo = ethtool_op_get_ufo,
4367 .get_flags = ethtool_op_get_flags,
4370 static const struct net_device_ops bond_netdev_ops = {
4371 .ndo_init = bond_init,
4372 .ndo_uninit = bond_uninit,
4373 .ndo_open = bond_open,
4374 .ndo_stop = bond_close,
4375 .ndo_start_xmit = bond_start_xmit,
4376 .ndo_get_stats = bond_get_stats,
4377 .ndo_do_ioctl = bond_do_ioctl,
4378 .ndo_set_multicast_list = bond_set_multicast_list,
4379 .ndo_change_mtu = bond_change_mtu,
4380 .ndo_set_mac_address = bond_set_mac_address,
4381 .ndo_neigh_setup = bond_neigh_setup,
4382 .ndo_vlan_rx_register = bond_vlan_rx_register,
4383 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4384 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4387 static void bond_setup(struct net_device *bond_dev)
4389 struct bonding *bond = netdev_priv(bond_dev);
4391 /* initialize rwlocks */
4392 rwlock_init(&bond->lock);
4393 rwlock_init(&bond->curr_slave_lock);
4395 bond->params = bonding_defaults;
4397 /* Initialize pointers */
4398 bond->dev = bond_dev;
4399 INIT_LIST_HEAD(&bond->vlan_list);
4401 /* Initialize the device entry points */
4402 ether_setup(bond_dev);
4403 bond_dev->netdev_ops = &bond_netdev_ops;
4404 bond_dev->ethtool_ops = &bond_ethtool_ops;
4405 bond_set_mode_ops(bond, bond->params.mode);
4407 bond_dev->destructor = free_netdev;
4409 /* Initialize the device options */
4410 bond_dev->tx_queue_len = 0;
4411 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4412 bond_dev->priv_flags |= IFF_BONDING;
4413 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4415 if (bond->params.arp_interval)
4416 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
4418 /* At first, we block adding VLANs. That's the only way to
4419 * prevent problems that occur when adding VLANs over an
4420 * empty bond. The block will be removed once non-challenged
4421 * slaves are enslaved.
4423 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4425 /* don't acquire bond device's netif_tx_lock when
4427 bond_dev->features |= NETIF_F_LLTX;
4429 /* By default, we declare the bond to be fully
4430 * VLAN hardware accelerated capable. Special
4431 * care is taken in the various xmit functions
4432 * when there are slaves that are not hw accel
4435 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4436 NETIF_F_HW_VLAN_RX |
4437 NETIF_F_HW_VLAN_FILTER);
4441 static void bond_work_cancel_all(struct bonding *bond)
4443 write_lock_bh(&bond->lock);
4444 bond->kill_timers = 1;
4445 write_unlock_bh(&bond->lock);
4447 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4448 cancel_delayed_work(&bond->mii_work);
4450 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4451 cancel_delayed_work(&bond->arp_work);
4453 if (bond->params.mode == BOND_MODE_ALB &&
4454 delayed_work_pending(&bond->alb_work))
4455 cancel_delayed_work(&bond->alb_work);
4457 if (bond->params.mode == BOND_MODE_8023AD &&
4458 delayed_work_pending(&bond->ad_work))
4459 cancel_delayed_work(&bond->ad_work);
4463 * Destroy a bonding device.
4464 * Must be under rtnl_lock when this function is called.
4466 static void bond_uninit(struct net_device *bond_dev)
4468 struct bonding *bond = netdev_priv(bond_dev);
4470 /* Release the bonded slaves */
4471 bond_release_all(bond_dev);
4473 list_del(&bond->bond_list);
4475 bond_work_cancel_all(bond);
4477 bond_remove_proc_entry(bond);
4480 destroy_workqueue(bond->wq);
4482 __hw_addr_flush(&bond->mc_list);
4485 /*------------------------- Module initialization ---------------------------*/
4488 * Convert string input module parms. Accept either the
4489 * number of the mode or its string name. A bit complicated because
4490 * some mode names are substrings of other names, and calls from sysfs
4491 * may have whitespace in the name (trailing newlines, for example).
4493 int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4495 int modeint = -1, i, rv;
4496 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4498 for (p = (char *)buf; *p; p++)
4499 if (!(isdigit(*p) || isspace(*p)))
4503 rv = sscanf(buf, "%20s", modestr);
4505 rv = sscanf(buf, "%d", &modeint);
4510 for (i = 0; tbl[i].modename; i++) {
4511 if (modeint == tbl[i].mode)
4513 if (strcmp(modestr, tbl[i].modename) == 0)
4520 static int bond_check_params(struct bond_params *params)
4522 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
4525 * Convert string parameters.
4528 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4529 if (bond_mode == -1) {
4530 pr_err("Error: Invalid bonding mode \"%s\"\n",
4531 mode == NULL ? "NULL" : mode);
4536 if (xmit_hash_policy) {
4537 if ((bond_mode != BOND_MODE_XOR) &&
4538 (bond_mode != BOND_MODE_8023AD)) {
4539 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4540 bond_mode_name(bond_mode));
4542 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4544 if (xmit_hashtype == -1) {
4545 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4546 xmit_hash_policy == NULL ? "NULL" :
4554 if (bond_mode != BOND_MODE_8023AD) {
4555 pr_info("lacp_rate param is irrelevant in mode %s\n",
4556 bond_mode_name(bond_mode));
4558 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4559 if (lacp_fast == -1) {
4560 pr_err("Error: Invalid lacp rate \"%s\"\n",
4561 lacp_rate == NULL ? "NULL" : lacp_rate);
4568 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4569 if (params->ad_select == -1) {
4570 pr_err("Error: Invalid ad_select \"%s\"\n",
4571 ad_select == NULL ? "NULL" : ad_select);
4575 if (bond_mode != BOND_MODE_8023AD) {
4576 pr_warning("ad_select param only affects 802.3ad mode\n");
4579 params->ad_select = BOND_AD_STABLE;
4582 if (max_bonds < 0) {
4583 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4584 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4585 max_bonds = BOND_DEFAULT_MAX_BONDS;
4589 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4590 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4591 miimon = BOND_LINK_MON_INTERV;
4595 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4600 if (downdelay < 0) {
4601 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4602 downdelay, INT_MAX);
4606 if ((use_carrier != 0) && (use_carrier != 1)) {
4607 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4612 if (num_grat_arp < 0 || num_grat_arp > 255) {
4613 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
4618 if (num_unsol_na < 0 || num_unsol_na > 255) {
4619 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4624 /* reset values for 802.3ad */
4625 if (bond_mode == BOND_MODE_8023AD) {
4627 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4628 pr_warning("Forcing miimon to 100msec\n");
4633 /* reset values for TLB/ALB */
4634 if ((bond_mode == BOND_MODE_TLB) ||
4635 (bond_mode == BOND_MODE_ALB)) {
4637 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
4638 pr_warning("Forcing miimon to 100msec\n");
4643 if (bond_mode == BOND_MODE_ALB) {
4644 pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
4649 if (updelay || downdelay) {
4650 /* just warn the user the up/down delay will have
4651 * no effect since miimon is zero...
4653 pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
4654 updelay, downdelay);
4657 /* don't allow arp monitoring */
4659 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4660 miimon, arp_interval);
4664 if ((updelay % miimon) != 0) {
4665 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4667 (updelay / miimon) * miimon);
4672 if ((downdelay % miimon) != 0) {
4673 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4675 (downdelay / miimon) * miimon);
4678 downdelay /= miimon;
4681 if (arp_interval < 0) {
4682 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4683 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4684 arp_interval = BOND_LINK_ARP_INTERV;
4687 for (arp_ip_count = 0;
4688 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4690 /* not complete check, but should be good enough to
4692 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4693 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4694 arp_ip_target[arp_ip_count]);
4697 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
4698 arp_target[arp_ip_count] = ip;
4702 if (arp_interval && !arp_ip_count) {
4703 /* don't allow arping if no arp_ip_target given... */
4704 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4710 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4711 pr_err("arp_validate only supported in active-backup mode\n");
4714 if (!arp_interval) {
4715 pr_err("arp_validate requires arp_interval\n");
4719 arp_validate_value = bond_parse_parm(arp_validate,
4721 if (arp_validate_value == -1) {
4722 pr_err("Error: invalid arp_validate \"%s\"\n",
4723 arp_validate == NULL ? "NULL" : arp_validate);
4727 arp_validate_value = 0;
4730 pr_info("MII link monitoring set to %d ms\n", miimon);
4731 } else if (arp_interval) {
4734 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4736 arp_validate_tbl[arp_validate_value].modename,
4739 for (i = 0; i < arp_ip_count; i++)
4740 pr_info(" %s", arp_ip_target[i]);
4744 } else if (max_bonds) {
4745 /* miimon and arp_interval not set, we need one so things
4746 * work as expected, see bonding.txt for details
4748 pr_warning("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
4751 if (primary && !USES_PRIMARY(bond_mode)) {
4752 /* currently, using a primary only makes sense
4753 * in active backup, TLB or ALB modes
4755 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4756 primary, bond_mode_name(bond_mode));
4760 if (primary && primary_reselect) {
4761 primary_reselect_value = bond_parse_parm(primary_reselect,
4763 if (primary_reselect_value == -1) {
4764 pr_err("Error: Invalid primary_reselect \"%s\"\n",
4766 NULL ? "NULL" : primary_reselect);
4770 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
4773 if (fail_over_mac) {
4774 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4776 if (fail_over_mac_value == -1) {
4777 pr_err("Error: invalid fail_over_mac \"%s\"\n",
4778 arp_validate == NULL ? "NULL" : arp_validate);
4782 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4783 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
4785 fail_over_mac_value = BOND_FOM_NONE;
4788 /* fill params struct with the proper values */
4789 params->mode = bond_mode;
4790 params->xmit_policy = xmit_hashtype;
4791 params->miimon = miimon;
4792 params->num_grat_arp = num_grat_arp;
4793 params->num_unsol_na = num_unsol_na;
4794 params->arp_interval = arp_interval;
4795 params->arp_validate = arp_validate_value;
4796 params->updelay = updelay;
4797 params->downdelay = downdelay;
4798 params->use_carrier = use_carrier;
4799 params->lacp_fast = lacp_fast;
4800 params->primary[0] = 0;
4801 params->primary_reselect = primary_reselect_value;
4802 params->fail_over_mac = fail_over_mac_value;
4805 strncpy(params->primary, primary, IFNAMSIZ);
4806 params->primary[IFNAMSIZ - 1] = 0;
4809 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4814 static struct lock_class_key bonding_netdev_xmit_lock_key;
4815 static struct lock_class_key bonding_netdev_addr_lock_key;
4817 static void bond_set_lockdep_class_one(struct net_device *dev,
4818 struct netdev_queue *txq,
4821 lockdep_set_class(&txq->_xmit_lock,
4822 &bonding_netdev_xmit_lock_key);
4825 static void bond_set_lockdep_class(struct net_device *dev)
4827 lockdep_set_class(&dev->addr_list_lock,
4828 &bonding_netdev_addr_lock_key);
4829 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
4833 * Called from registration process
4835 static int bond_init(struct net_device *bond_dev)
4837 struct bonding *bond = netdev_priv(bond_dev);
4838 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
4840 pr_debug("Begin bond_init for %s\n", bond_dev->name);
4842 bond->wq = create_singlethread_workqueue(bond_dev->name);
4846 bond_set_lockdep_class(bond_dev);
4848 netif_carrier_off(bond_dev);
4850 bond_create_proc_entry(bond);
4851 list_add_tail(&bond->bond_list, &bn->dev_list);
4853 bond_prepare_sysfs_group(bond);
4855 __hw_addr_init(&bond->mc_list);
4859 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
4861 if (tb[IFLA_ADDRESS]) {
4862 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
4864 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
4865 return -EADDRNOTAVAIL;
4870 static struct rtnl_link_ops bond_link_ops __read_mostly = {
4872 .priv_size = sizeof(struct bonding),
4873 .setup = bond_setup,
4874 .validate = bond_validate,
4877 /* Create a new bond based on the specified name and bonding parameters.
4878 * If name is NULL, obtain a suitable "bond%d" name for us.
4879 * Caller must NOT hold rtnl_lock; we need to release it here before we
4880 * set up our sysfs entries.
4882 int bond_create(struct net *net, const char *name)
4884 struct net_device *bond_dev;
4889 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
4892 pr_err("%s: eek! can't alloc netdev!\n", name);
4897 dev_net_set(bond_dev, net);
4898 bond_dev->rtnl_link_ops = &bond_link_ops;
4901 res = dev_alloc_name(bond_dev, "bond%d");
4906 res = register_netdevice(bond_dev);
4914 free_netdev(bond_dev);
4918 static int __net_init bond_net_init(struct net *net)
4920 struct bond_net *bn = net_generic(net, bond_net_id);
4923 INIT_LIST_HEAD(&bn->dev_list);
4925 bond_create_proc_dir(bn);
4930 static void __net_exit bond_net_exit(struct net *net)
4932 struct bond_net *bn = net_generic(net, bond_net_id);
4934 bond_destroy_proc_dir(bn);
4937 static struct pernet_operations bond_net_ops = {
4938 .init = bond_net_init,
4939 .exit = bond_net_exit,
4941 .size = sizeof(struct bond_net),
4944 static int __init bonding_init(void)
4949 pr_info("%s", version);
4951 res = bond_check_params(&bonding_defaults);
4955 res = register_pernet_subsys(&bond_net_ops);
4959 res = rtnl_link_register(&bond_link_ops);
4963 for (i = 0; i < max_bonds; i++) {
4964 res = bond_create(&init_net, NULL);
4969 res = bond_create_sysfs();
4973 register_netdevice_notifier(&bond_netdev_notifier);
4974 register_inetaddr_notifier(&bond_inetaddr_notifier);
4975 bond_register_ipv6_notifier();
4979 rtnl_link_unregister(&bond_link_ops);
4981 unregister_pernet_subsys(&bond_net_ops);
4986 static void __exit bonding_exit(void)
4988 unregister_netdevice_notifier(&bond_netdev_notifier);
4989 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
4990 bond_unregister_ipv6_notifier();
4992 bond_destroy_sysfs();
4994 rtnl_link_unregister(&bond_link_ops);
4995 unregister_pernet_subsys(&bond_net_ops);
4998 module_init(bonding_init);
4999 module_exit(bonding_exit);
5000 MODULE_LICENSE("GPL");
5001 MODULE_VERSION(DRV_VERSION);
5002 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5003 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5004 MODULE_ALIAS_RTNL_LINK("bond");