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/netpoll.h>
63 #include <linux/inetdevice.h>
64 #include <linux/igmp.h>
65 #include <linux/etherdevice.h>
66 #include <linux/skbuff.h>
68 #include <linux/rtnetlink.h>
69 #include <linux/proc_fs.h>
70 #include <linux/seq_file.h>
71 #include <linux/smp.h>
72 #include <linux/if_ether.h>
74 #include <linux/mii.h>
75 #include <linux/ethtool.h>
76 #include <linux/if_vlan.h>
77 #include <linux/if_bonding.h>
78 #include <linux/jiffies.h>
79 #include <net/route.h>
80 #include <net/net_namespace.h>
81 #include <net/netns/generic.h>
86 /*---------------------------- Module parameters ----------------------------*/
88 /* monitor all links that often (in milliseconds). <=0 disables monitoring */
89 #define BOND_LINK_MON_INTERV 0
90 #define BOND_LINK_ARP_INTERV 0
92 static int max_bonds = BOND_DEFAULT_MAX_BONDS;
93 static int tx_queues = BOND_DEFAULT_TX_QUEUES;
94 static int num_grat_arp = 1;
95 static int num_unsol_na = 1;
96 static int miimon = BOND_LINK_MON_INTERV;
99 static int use_carrier = 1;
101 static char *primary;
102 static char *primary_reselect;
103 static char *lacp_rate;
104 static char *ad_select;
105 static char *xmit_hash_policy;
106 static int arp_interval = BOND_LINK_ARP_INTERV;
107 static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
108 static char *arp_validate;
109 static char *fail_over_mac;
110 static int all_slaves_active = 0;
111 static struct bond_params bonding_defaults;
112 static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
114 module_param(max_bonds, int, 0);
115 MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
116 module_param(tx_queues, int, 0);
117 MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
118 module_param(num_grat_arp, int, 0644);
119 MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
120 module_param(num_unsol_na, int, 0644);
121 MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
122 module_param(miimon, int, 0);
123 MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
124 module_param(updelay, int, 0);
125 MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
126 module_param(downdelay, int, 0);
127 MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
129 module_param(use_carrier, int, 0);
130 MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
131 "0 for off, 1 for on (default)");
132 module_param(mode, charp, 0);
133 MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
134 "1 for active-backup, 2 for balance-xor, "
135 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
136 "6 for balance-alb");
137 module_param(primary, charp, 0);
138 MODULE_PARM_DESC(primary, "Primary network device to use");
139 module_param(primary_reselect, charp, 0);
140 MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
142 "0 for always (default), "
143 "1 for only if speed of primary is "
145 "2 for only on active slave "
147 module_param(lacp_rate, charp, 0);
148 MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
150 module_param(ad_select, charp, 0);
151 MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
152 module_param(xmit_hash_policy, charp, 0);
153 MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
154 ", 1 for layer 3+4");
155 module_param(arp_interval, int, 0);
156 MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
157 module_param_array(arp_ip_target, charp, NULL, 0);
158 MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
159 module_param(arp_validate, charp, 0);
160 MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
161 module_param(fail_over_mac, charp, 0);
162 MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
163 module_param(all_slaves_active, int, 0);
164 MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
165 "by setting active flag for all slaves. "
166 "0 for never (default), 1 for always.");
167 module_param(resend_igmp, int, 0);
168 MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on link failure");
170 /*----------------------------- Global variables ----------------------------*/
172 static const char * const version =
173 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
175 int bond_net_id __read_mostly;
177 static __be32 arp_target[BOND_MAX_ARP_TARGETS];
178 static int arp_ip_count;
179 static int bond_mode = BOND_MODE_ROUNDROBIN;
180 static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
181 static int lacp_fast;
182 #ifdef CONFIG_NET_POLL_CONTROLLER
183 static int disable_netpoll = 1;
186 const struct bond_parm_tbl bond_lacp_tbl[] = {
187 { "slow", AD_LACP_SLOW},
188 { "fast", AD_LACP_FAST},
192 const struct bond_parm_tbl bond_mode_tbl[] = {
193 { "balance-rr", BOND_MODE_ROUNDROBIN},
194 { "active-backup", BOND_MODE_ACTIVEBACKUP},
195 { "balance-xor", BOND_MODE_XOR},
196 { "broadcast", BOND_MODE_BROADCAST},
197 { "802.3ad", BOND_MODE_8023AD},
198 { "balance-tlb", BOND_MODE_TLB},
199 { "balance-alb", BOND_MODE_ALB},
203 const struct bond_parm_tbl xmit_hashtype_tbl[] = {
204 { "layer2", BOND_XMIT_POLICY_LAYER2},
205 { "layer3+4", BOND_XMIT_POLICY_LAYER34},
206 { "layer2+3", BOND_XMIT_POLICY_LAYER23},
210 const struct bond_parm_tbl arp_validate_tbl[] = {
211 { "none", BOND_ARP_VALIDATE_NONE},
212 { "active", BOND_ARP_VALIDATE_ACTIVE},
213 { "backup", BOND_ARP_VALIDATE_BACKUP},
214 { "all", BOND_ARP_VALIDATE_ALL},
218 const struct bond_parm_tbl fail_over_mac_tbl[] = {
219 { "none", BOND_FOM_NONE},
220 { "active", BOND_FOM_ACTIVE},
221 { "follow", BOND_FOM_FOLLOW},
225 const struct bond_parm_tbl pri_reselect_tbl[] = {
226 { "always", BOND_PRI_RESELECT_ALWAYS},
227 { "better", BOND_PRI_RESELECT_BETTER},
228 { "failure", BOND_PRI_RESELECT_FAILURE},
232 struct bond_parm_tbl ad_select_tbl[] = {
233 { "stable", BOND_AD_STABLE},
234 { "bandwidth", BOND_AD_BANDWIDTH},
235 { "count", BOND_AD_COUNT},
239 /*-------------------------- Forward declarations ---------------------------*/
241 static void bond_send_gratuitous_arp(struct bonding *bond);
242 static int bond_init(struct net_device *bond_dev);
243 static void bond_uninit(struct net_device *bond_dev);
245 /*---------------------------- General routines -----------------------------*/
247 static const char *bond_mode_name(int mode)
249 static const char *names[] = {
250 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
251 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
252 [BOND_MODE_XOR] = "load balancing (xor)",
253 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
254 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
255 [BOND_MODE_TLB] = "transmit load balancing",
256 [BOND_MODE_ALB] = "adaptive load balancing",
259 if (mode < 0 || mode > BOND_MODE_ALB)
265 /*---------------------------------- VLAN -----------------------------------*/
268 * bond_add_vlan - add a new vlan id on bond
269 * @bond: bond that got the notification
270 * @vlan_id: the vlan id to add
272 * Returns -ENOMEM if allocation failed.
274 static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
276 struct vlan_entry *vlan;
278 pr_debug("bond: %s, vlan id %d\n",
279 (bond ? bond->dev->name : "None"), vlan_id);
281 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
285 INIT_LIST_HEAD(&vlan->vlan_list);
286 vlan->vlan_id = vlan_id;
288 write_lock_bh(&bond->lock);
290 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
292 write_unlock_bh(&bond->lock);
294 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
300 * bond_del_vlan - delete a vlan id from bond
301 * @bond: bond that got the notification
302 * @vlan_id: the vlan id to delete
304 * returns -ENODEV if @vlan_id was not found in @bond.
306 static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
308 struct vlan_entry *vlan;
311 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
313 write_lock_bh(&bond->lock);
315 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
316 if (vlan->vlan_id == vlan_id) {
317 list_del(&vlan->vlan_list);
319 if (bond_is_lb(bond))
320 bond_alb_clear_vlan(bond, vlan_id);
322 pr_debug("removed VLAN ID %d from bond %s\n",
323 vlan_id, bond->dev->name);
327 if (list_empty(&bond->vlan_list) &&
328 (bond->slave_cnt == 0)) {
329 /* Last VLAN removed and no slaves, so
330 * restore block on adding VLANs. This will
331 * be removed once new slaves that are not
332 * VLAN challenged will be added.
334 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
342 pr_debug("couldn't find VLAN ID %d in bond %s\n",
343 vlan_id, bond->dev->name);
346 write_unlock_bh(&bond->lock);
351 * bond_has_challenged_slaves
352 * @bond: the bond we're working on
354 * Searches the slave list. Returns 1 if a vlan challenged slave
355 * was found, 0 otherwise.
357 * Assumes bond->lock is held.
359 static int bond_has_challenged_slaves(struct bonding *bond)
364 bond_for_each_slave(bond, slave, i) {
365 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
366 pr_debug("found VLAN challenged slave - %s\n",
372 pr_debug("no VLAN challenged slaves found\n");
377 * bond_next_vlan - safely skip to the next item in the vlans list.
378 * @bond: the bond we're working on
379 * @curr: item we're advancing from
381 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
382 * or @curr->next otherwise (even if it is @curr itself again).
384 * Caller must hold bond->lock
386 struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
388 struct vlan_entry *next, *last;
390 if (list_empty(&bond->vlan_list))
394 next = list_entry(bond->vlan_list.next,
395 struct vlan_entry, vlan_list);
397 last = list_entry(bond->vlan_list.prev,
398 struct vlan_entry, vlan_list);
400 next = list_entry(bond->vlan_list.next,
401 struct vlan_entry, vlan_list);
403 next = list_entry(curr->vlan_list.next,
404 struct vlan_entry, vlan_list);
412 * bond_dev_queue_xmit - Prepare skb for xmit.
414 * @bond: bond device that got this skb for tx.
415 * @skb: hw accel VLAN tagged skb to transmit
416 * @slave_dev: slave that is supposed to xmit this skbuff
418 * When the bond gets an skb to transmit that is
419 * already hardware accelerated VLAN tagged, and it
420 * needs to relay this skb to a slave that is not
421 * hw accel capable, the skb needs to be "unaccelerated",
422 * i.e. strip the hwaccel tag and re-insert it as part
425 int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
426 struct net_device *slave_dev)
428 unsigned short uninitialized_var(vlan_id);
430 /* Test vlan_list not vlgrp to catch and handle 802.1p tags */
431 if (!list_empty(&bond->vlan_list) &&
432 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
433 vlan_get_tag(skb, &vlan_id) == 0) {
434 skb->dev = slave_dev;
435 skb = vlan_put_tag(skb, vlan_id);
437 /* vlan_put_tag() frees the skb in case of error,
438 * so return success here so the calling functions
439 * won't attempt to free is again.
444 skb->dev = slave_dev;
448 #ifdef CONFIG_NET_POLL_CONTROLLER
449 if (unlikely(bond->dev->priv_flags & IFF_IN_NETPOLL)) {
450 struct netpoll *np = bond->dev->npinfo->netpoll;
451 slave_dev->npinfo = bond->dev->npinfo;
452 np->real_dev = np->dev = skb->dev;
453 slave_dev->priv_flags |= IFF_IN_NETPOLL;
454 netpoll_send_skb(np, skb);
455 slave_dev->priv_flags &= ~IFF_IN_NETPOLL;
465 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
466 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
468 * a. This operation is performed in IOCTL context,
469 * b. The operation is protected by the RTNL semaphore in the 8021q code,
470 * c. Holding a lock with BH disabled while directly calling a base driver
471 * entry point is generally a BAD idea.
473 * The design of synchronization/protection for this operation in the 8021q
474 * module is good for one or more VLAN devices over a single physical device
475 * and cannot be extended for a teaming solution like bonding, so there is a
476 * potential race condition here where a net device from the vlan group might
477 * be referenced (either by a base driver or the 8021q code) while it is being
478 * removed from the system. However, it turns out we're not making matters
479 * worse, and if it works for regular VLAN usage it will work here too.
483 * bond_vlan_rx_register - Propagates registration to slaves
484 * @bond_dev: bonding net device that got called
485 * @grp: vlan group being registered
487 static void bond_vlan_rx_register(struct net_device *bond_dev,
488 struct vlan_group *grp)
490 struct bonding *bond = netdev_priv(bond_dev);
494 write_lock(&bond->lock);
496 write_unlock(&bond->lock);
498 bond_for_each_slave(bond, slave, i) {
499 struct net_device *slave_dev = slave->dev;
500 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
502 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
503 slave_ops->ndo_vlan_rx_register) {
504 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
510 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
511 * @bond_dev: bonding net device that got called
512 * @vid: vlan id being added
514 static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
516 struct bonding *bond = netdev_priv(bond_dev);
520 bond_for_each_slave(bond, slave, i) {
521 struct net_device *slave_dev = slave->dev;
522 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
524 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
525 slave_ops->ndo_vlan_rx_add_vid) {
526 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
530 res = bond_add_vlan(bond, vid);
532 pr_err("%s: Error: Failed to add vlan id %d\n",
533 bond_dev->name, vid);
538 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
539 * @bond_dev: bonding net device that got called
540 * @vid: vlan id being removed
542 static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
544 struct bonding *bond = netdev_priv(bond_dev);
546 struct net_device *vlan_dev;
549 bond_for_each_slave(bond, slave, i) {
550 struct net_device *slave_dev = slave->dev;
551 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
553 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
554 slave_ops->ndo_vlan_rx_kill_vid) {
555 /* Save and then restore vlan_dev in the grp array,
556 * since the slave's driver might clear it.
558 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
559 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
560 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
564 res = bond_del_vlan(bond, vid);
566 pr_err("%s: Error: Failed to remove vlan id %d\n",
567 bond_dev->name, vid);
571 static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
573 struct vlan_entry *vlan;
574 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
579 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
580 slave_ops->ndo_vlan_rx_register)
581 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
583 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
584 !(slave_ops->ndo_vlan_rx_add_vid))
587 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
588 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
591 static void bond_del_vlans_from_slave(struct bonding *bond,
592 struct net_device *slave_dev)
594 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
595 struct vlan_entry *vlan;
596 struct net_device *vlan_dev;
601 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
602 !(slave_ops->ndo_vlan_rx_kill_vid))
605 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
608 /* Save and then restore vlan_dev in the grp array,
609 * since the slave's driver might clear it.
611 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
612 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
613 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
617 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
618 slave_ops->ndo_vlan_rx_register)
619 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
622 /*------------------------------- Link status -------------------------------*/
625 * Set the carrier state for the master according to the state of its
626 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
627 * do special 802.3ad magic.
629 * Returns zero if carrier state does not change, nonzero if it does.
631 static int bond_set_carrier(struct bonding *bond)
636 if (bond->slave_cnt == 0)
639 if (bond->params.mode == BOND_MODE_8023AD)
640 return bond_3ad_set_carrier(bond);
642 bond_for_each_slave(bond, slave, i) {
643 if (slave->link == BOND_LINK_UP) {
644 if (!netif_carrier_ok(bond->dev)) {
645 netif_carrier_on(bond->dev);
653 if (netif_carrier_ok(bond->dev)) {
654 netif_carrier_off(bond->dev);
661 * Get link speed and duplex from the slave's base driver
662 * using ethtool. If for some reason the call fails or the
663 * values are invalid, fake speed and duplex to 100/Full
666 static int bond_update_speed_duplex(struct slave *slave)
668 struct net_device *slave_dev = slave->dev;
669 struct ethtool_cmd etool;
672 /* Fake speed and duplex */
673 slave->speed = SPEED_100;
674 slave->duplex = DUPLEX_FULL;
676 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
679 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
683 switch (etool.speed) {
693 switch (etool.duplex) {
701 slave->speed = etool.speed;
702 slave->duplex = etool.duplex;
708 * if <dev> supports MII link status reporting, check its link status.
710 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
711 * depending upon the setting of the use_carrier parameter.
713 * Return either BMSR_LSTATUS, meaning that the link is up (or we
714 * can't tell and just pretend it is), or 0, meaning that the link is
717 * If reporting is non-zero, instead of faking link up, return -1 if
718 * both ETHTOOL and MII ioctls fail (meaning the device does not
719 * support them). If use_carrier is set, return whatever it says.
720 * It'd be nice if there was a good way to tell if a driver supports
721 * netif_carrier, but there really isn't.
723 static int bond_check_dev_link(struct bonding *bond,
724 struct net_device *slave_dev, int reporting)
726 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
727 int (*ioctl)(struct net_device *, struct ifreq *, int);
729 struct mii_ioctl_data *mii;
731 if (!reporting && !netif_running(slave_dev))
734 if (bond->params.use_carrier)
735 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
737 /* Try to get link status using Ethtool first. */
738 if (slave_dev->ethtool_ops) {
739 if (slave_dev->ethtool_ops->get_link) {
742 link = slave_dev->ethtool_ops->get_link(slave_dev);
744 return link ? BMSR_LSTATUS : 0;
748 /* Ethtool can't be used, fallback to MII ioctls. */
749 ioctl = slave_ops->ndo_do_ioctl;
751 /* TODO: set pointer to correct ioctl on a per team member */
752 /* bases to make this more efficient. that is, once */
753 /* we determine the correct ioctl, we will always */
754 /* call it and not the others for that team */
758 * We cannot assume that SIOCGMIIPHY will also read a
759 * register; not all network drivers (e.g., e100)
763 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
764 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
766 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
767 mii->reg_num = MII_BMSR;
768 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
769 return mii->val_out & BMSR_LSTATUS;
774 * If reporting, report that either there's no dev->do_ioctl,
775 * or both SIOCGMIIREG and get_link failed (meaning that we
776 * cannot report link status). If not reporting, pretend
779 return reporting ? -1 : BMSR_LSTATUS;
782 /*----------------------------- Multicast list ------------------------------*/
785 * Push the promiscuity flag down to appropriate slaves
787 static int bond_set_promiscuity(struct bonding *bond, int inc)
790 if (USES_PRIMARY(bond->params.mode)) {
791 /* write lock already acquired */
792 if (bond->curr_active_slave) {
793 err = dev_set_promiscuity(bond->curr_active_slave->dev,
799 bond_for_each_slave(bond, slave, i) {
800 err = dev_set_promiscuity(slave->dev, inc);
809 * Push the allmulti flag down to all slaves
811 static int bond_set_allmulti(struct bonding *bond, int inc)
814 if (USES_PRIMARY(bond->params.mode)) {
815 /* write lock already acquired */
816 if (bond->curr_active_slave) {
817 err = dev_set_allmulti(bond->curr_active_slave->dev,
823 bond_for_each_slave(bond, slave, i) {
824 err = dev_set_allmulti(slave->dev, inc);
833 * Add a Multicast address to slaves
836 static void bond_mc_add(struct bonding *bond, void *addr)
838 if (USES_PRIMARY(bond->params.mode)) {
839 /* write lock already acquired */
840 if (bond->curr_active_slave)
841 dev_mc_add(bond->curr_active_slave->dev, addr);
846 bond_for_each_slave(bond, slave, i)
847 dev_mc_add(slave->dev, addr);
852 * Remove a multicast address from slave
855 static void bond_mc_del(struct bonding *bond, void *addr)
857 if (USES_PRIMARY(bond->params.mode)) {
858 /* write lock already acquired */
859 if (bond->curr_active_slave)
860 dev_mc_del(bond->curr_active_slave->dev, addr);
864 bond_for_each_slave(bond, slave, i) {
865 dev_mc_del(slave->dev, addr);
871 static void __bond_resend_igmp_join_requests(struct net_device *dev)
873 struct in_device *in_dev;
874 struct ip_mc_list *im;
877 in_dev = __in_dev_get_rcu(dev);
879 for (im = in_dev->mc_list; im; im = im->next)
880 ip_mc_rejoin_group(im);
887 * Retrieve the list of registered multicast addresses for the bonding
888 * device and retransmit an IGMP JOIN request to the current active
891 static void bond_resend_igmp_join_requests(struct bonding *bond)
893 struct net_device *vlan_dev;
894 struct vlan_entry *vlan;
896 read_lock(&bond->lock);
898 /* rejoin all groups on bond device */
899 __bond_resend_igmp_join_requests(bond->dev);
901 /* rejoin all groups on vlan devices */
903 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
904 vlan_dev = vlan_group_get_device(bond->vlgrp,
907 __bond_resend_igmp_join_requests(vlan_dev);
911 if (--bond->igmp_retrans > 0)
912 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
914 read_unlock(&bond->lock);
917 void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
919 struct bonding *bond = container_of(work, struct bonding,
921 bond_resend_igmp_join_requests(bond);
925 * flush all members of flush->mc_list from device dev->mc_list
927 static void bond_mc_list_flush(struct net_device *bond_dev,
928 struct net_device *slave_dev)
930 struct bonding *bond = netdev_priv(bond_dev);
931 struct netdev_hw_addr *ha;
933 netdev_for_each_mc_addr(ha, bond_dev)
934 dev_mc_del(slave_dev, ha->addr);
936 if (bond->params.mode == BOND_MODE_8023AD) {
937 /* del lacpdu mc addr from mc list */
938 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
940 dev_mc_del(slave_dev, lacpdu_multicast);
944 /*--------------------------- Active slave change ---------------------------*/
947 * Update the mc list and multicast-related flags for the new and
948 * old active slaves (if any) according to the multicast mode, and
949 * promiscuous flags unconditionally.
951 static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
952 struct slave *old_active)
954 struct netdev_hw_addr *ha;
956 if (!USES_PRIMARY(bond->params.mode))
957 /* nothing to do - mc list is already up-to-date on
963 if (bond->dev->flags & IFF_PROMISC)
964 dev_set_promiscuity(old_active->dev, -1);
966 if (bond->dev->flags & IFF_ALLMULTI)
967 dev_set_allmulti(old_active->dev, -1);
969 netdev_for_each_mc_addr(ha, bond->dev)
970 dev_mc_del(old_active->dev, ha->addr);
974 /* FIXME: Signal errors upstream. */
975 if (bond->dev->flags & IFF_PROMISC)
976 dev_set_promiscuity(new_active->dev, 1);
978 if (bond->dev->flags & IFF_ALLMULTI)
979 dev_set_allmulti(new_active->dev, 1);
981 netdev_for_each_mc_addr(ha, bond->dev)
982 dev_mc_add(new_active->dev, ha->addr);
987 * bond_do_fail_over_mac
989 * Perform special MAC address swapping for fail_over_mac settings
991 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
993 static void bond_do_fail_over_mac(struct bonding *bond,
994 struct slave *new_active,
995 struct slave *old_active)
996 __releases(&bond->curr_slave_lock)
997 __releases(&bond->lock)
998 __acquires(&bond->lock)
999 __acquires(&bond->curr_slave_lock)
1001 u8 tmp_mac[ETH_ALEN];
1002 struct sockaddr saddr;
1005 switch (bond->params.fail_over_mac) {
1006 case BOND_FOM_ACTIVE:
1008 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1009 new_active->dev->addr_len);
1011 case BOND_FOM_FOLLOW:
1013 * if new_active && old_active, swap them
1014 * if just old_active, do nothing (going to no active slave)
1015 * if just new_active, set new_active to bond's MAC
1020 write_unlock_bh(&bond->curr_slave_lock);
1021 read_unlock(&bond->lock);
1024 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1025 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1027 saddr.sa_family = new_active->dev->type;
1029 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1030 saddr.sa_family = bond->dev->type;
1033 rv = dev_set_mac_address(new_active->dev, &saddr);
1035 pr_err("%s: Error %d setting MAC of slave %s\n",
1036 bond->dev->name, -rv, new_active->dev->name);
1043 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1044 saddr.sa_family = old_active->dev->type;
1046 rv = dev_set_mac_address(old_active->dev, &saddr);
1048 pr_err("%s: Error %d setting MAC of slave %s\n",
1049 bond->dev->name, -rv, new_active->dev->name);
1051 read_lock(&bond->lock);
1052 write_lock_bh(&bond->curr_slave_lock);
1055 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
1056 bond->dev->name, bond->params.fail_over_mac);
1062 static bool bond_should_change_active(struct bonding *bond)
1064 struct slave *prim = bond->primary_slave;
1065 struct slave *curr = bond->curr_active_slave;
1067 if (!prim || !curr || curr->link != BOND_LINK_UP)
1069 if (bond->force_primary) {
1070 bond->force_primary = false;
1073 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
1074 (prim->speed < curr->speed ||
1075 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
1077 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
1083 * find_best_interface - select the best available slave to be the active one
1084 * @bond: our bonding struct
1086 * Warning: Caller must hold curr_slave_lock for writing.
1088 static struct slave *bond_find_best_slave(struct bonding *bond)
1090 struct slave *new_active, *old_active;
1091 struct slave *bestslave = NULL;
1092 int mintime = bond->params.updelay;
1095 new_active = bond->curr_active_slave;
1097 if (!new_active) { /* there were no active slaves left */
1098 if (bond->slave_cnt > 0) /* found one slave */
1099 new_active = bond->first_slave;
1101 return NULL; /* still no slave, return NULL */
1104 if ((bond->primary_slave) &&
1105 bond->primary_slave->link == BOND_LINK_UP &&
1106 bond_should_change_active(bond)) {
1107 new_active = bond->primary_slave;
1110 /* remember where to stop iterating over the slaves */
1111 old_active = new_active;
1113 bond_for_each_slave_from(bond, new_active, i, old_active) {
1114 if (new_active->link == BOND_LINK_UP) {
1116 } else if (new_active->link == BOND_LINK_BACK &&
1117 IS_UP(new_active->dev)) {
1118 /* link up, but waiting for stabilization */
1119 if (new_active->delay < mintime) {
1120 mintime = new_active->delay;
1121 bestslave = new_active;
1130 * change_active_interface - change the active slave into the specified one
1131 * @bond: our bonding struct
1132 * @new: the new slave to make the active one
1134 * Set the new slave to the bond's settings and unset them on the old
1135 * curr_active_slave.
1136 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1138 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1139 * because it is apparently the best available slave we have, even though its
1140 * updelay hasn't timed out yet.
1142 * If new_active is not NULL, caller must hold bond->lock for read and
1143 * curr_slave_lock for write_bh.
1145 void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1147 struct slave *old_active = bond->curr_active_slave;
1149 if (old_active == new_active)
1153 new_active->jiffies = jiffies;
1155 if (new_active->link == BOND_LINK_BACK) {
1156 if (USES_PRIMARY(bond->params.mode)) {
1157 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1158 bond->dev->name, new_active->dev->name,
1159 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1162 new_active->delay = 0;
1163 new_active->link = BOND_LINK_UP;
1165 if (bond->params.mode == BOND_MODE_8023AD)
1166 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1168 if (bond_is_lb(bond))
1169 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1171 if (USES_PRIMARY(bond->params.mode)) {
1172 pr_info("%s: making interface %s the new active one.\n",
1173 bond->dev->name, new_active->dev->name);
1178 if (USES_PRIMARY(bond->params.mode))
1179 bond_mc_swap(bond, new_active, old_active);
1181 if (bond_is_lb(bond)) {
1182 bond_alb_handle_active_change(bond, new_active);
1184 bond_set_slave_inactive_flags(old_active);
1186 bond_set_slave_active_flags(new_active);
1188 bond->curr_active_slave = new_active;
1191 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1193 bond_set_slave_inactive_flags(old_active);
1196 bond_set_slave_active_flags(new_active);
1198 if (bond->params.fail_over_mac)
1199 bond_do_fail_over_mac(bond, new_active,
1202 bond->send_grat_arp = bond->params.num_grat_arp;
1203 bond_send_gratuitous_arp(bond);
1205 bond->send_unsol_na = bond->params.num_unsol_na;
1206 bond_send_unsolicited_na(bond);
1208 write_unlock_bh(&bond->curr_slave_lock);
1209 read_unlock(&bond->lock);
1211 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
1213 read_lock(&bond->lock);
1214 write_lock_bh(&bond->curr_slave_lock);
1218 /* resend IGMP joins since active slave has changed or
1219 * all were sent on curr_active_slave */
1220 if ((USES_PRIMARY(bond->params.mode) && new_active) ||
1221 bond->params.mode == BOND_MODE_ROUNDROBIN) {
1222 bond->igmp_retrans = bond->params.resend_igmp;
1223 queue_delayed_work(bond->wq, &bond->mcast_work, 0);
1228 * bond_select_active_slave - select a new active slave, if needed
1229 * @bond: our bonding struct
1231 * This functions should be called when one of the following occurs:
1232 * - The old curr_active_slave has been released or lost its link.
1233 * - The primary_slave has got its link back.
1234 * - A slave has got its link back and there's no old curr_active_slave.
1236 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1238 void bond_select_active_slave(struct bonding *bond)
1240 struct slave *best_slave;
1243 best_slave = bond_find_best_slave(bond);
1244 if (best_slave != bond->curr_active_slave) {
1245 bond_change_active_slave(bond, best_slave);
1246 rv = bond_set_carrier(bond);
1250 if (netif_carrier_ok(bond->dev)) {
1251 pr_info("%s: first active interface up!\n",
1254 pr_info("%s: now running without any active interface !\n",
1260 /*--------------------------- slave list handling ---------------------------*/
1263 * This function attaches the slave to the end of list.
1265 * bond->lock held for writing by caller.
1267 static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1269 if (bond->first_slave == NULL) { /* attaching the first slave */
1270 new_slave->next = new_slave;
1271 new_slave->prev = new_slave;
1272 bond->first_slave = new_slave;
1274 new_slave->next = bond->first_slave;
1275 new_slave->prev = bond->first_slave->prev;
1276 new_slave->next->prev = new_slave;
1277 new_slave->prev->next = new_slave;
1284 * This function detaches the slave from the list.
1285 * WARNING: no check is made to verify if the slave effectively
1286 * belongs to <bond>.
1287 * Nothing is freed on return, structures are just unchained.
1288 * If any slave pointer in bond was pointing to <slave>,
1289 * it should be changed by the calling function.
1291 * bond->lock held for writing by caller.
1293 static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1296 slave->next->prev = slave->prev;
1299 slave->prev->next = slave->next;
1301 if (bond->first_slave == slave) { /* slave is the first slave */
1302 if (bond->slave_cnt > 1) { /* there are more slave */
1303 bond->first_slave = slave->next;
1305 bond->first_slave = NULL; /* slave was the last one */
1314 #ifdef CONFIG_NET_POLL_CONTROLLER
1316 * You must hold read lock on bond->lock before calling this.
1318 static bool slaves_support_netpoll(struct net_device *bond_dev)
1320 struct bonding *bond = netdev_priv(bond_dev);
1321 struct slave *slave;
1325 bond_for_each_slave(bond, slave, i) {
1326 if ((slave->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
1327 !slave->dev->netdev_ops->ndo_poll_controller)
1330 return i != 0 && ret;
1333 static void bond_poll_controller(struct net_device *bond_dev)
1335 struct net_device *dev = bond_dev->npinfo->netpoll->real_dev;
1336 if (dev != bond_dev)
1337 netpoll_poll_dev(dev);
1340 static void bond_netpoll_cleanup(struct net_device *bond_dev)
1342 struct bonding *bond = netdev_priv(bond_dev);
1343 struct slave *slave;
1344 const struct net_device_ops *ops;
1347 read_lock(&bond->lock);
1348 bond_dev->npinfo = NULL;
1349 bond_for_each_slave(bond, slave, i) {
1351 ops = slave->dev->netdev_ops;
1352 if (ops->ndo_netpoll_cleanup)
1353 ops->ndo_netpoll_cleanup(slave->dev);
1355 slave->dev->npinfo = NULL;
1358 read_unlock(&bond->lock);
1363 static void bond_netpoll_cleanup(struct net_device *bond_dev)
1369 /*---------------------------------- IOCTL ----------------------------------*/
1371 static int bond_sethwaddr(struct net_device *bond_dev,
1372 struct net_device *slave_dev)
1374 pr_debug("bond_dev=%p\n", bond_dev);
1375 pr_debug("slave_dev=%p\n", slave_dev);
1376 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1377 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1381 #define BOND_VLAN_FEATURES \
1382 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1383 NETIF_F_HW_VLAN_FILTER)
1386 * Compute the common dev->feature set available to all slaves. Some
1387 * feature bits are managed elsewhere, so preserve those feature bits
1388 * on the master device.
1390 static int bond_compute_features(struct bonding *bond)
1392 struct slave *slave;
1393 struct net_device *bond_dev = bond->dev;
1394 unsigned long features = bond_dev->features;
1395 unsigned long vlan_features = 0;
1396 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1397 bond_dev->hard_header_len);
1400 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1401 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1403 if (!bond->first_slave)
1406 features &= ~NETIF_F_ONE_FOR_ALL;
1408 vlan_features = bond->first_slave->dev->vlan_features;
1409 bond_for_each_slave(bond, slave, i) {
1410 features = netdev_increment_features(features,
1411 slave->dev->features,
1412 NETIF_F_ONE_FOR_ALL);
1413 vlan_features = netdev_increment_features(vlan_features,
1414 slave->dev->vlan_features,
1415 NETIF_F_ONE_FOR_ALL);
1416 if (slave->dev->hard_header_len > max_hard_header_len)
1417 max_hard_header_len = slave->dev->hard_header_len;
1421 features |= (bond_dev->features & BOND_VLAN_FEATURES);
1422 bond_dev->features = netdev_fix_features(features, NULL);
1423 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
1424 bond_dev->hard_header_len = max_hard_header_len;
1429 static void bond_setup_by_slave(struct net_device *bond_dev,
1430 struct net_device *slave_dev)
1432 struct bonding *bond = netdev_priv(bond_dev);
1434 bond_dev->header_ops = slave_dev->header_ops;
1436 bond_dev->type = slave_dev->type;
1437 bond_dev->hard_header_len = slave_dev->hard_header_len;
1438 bond_dev->addr_len = slave_dev->addr_len;
1440 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1441 slave_dev->addr_len);
1442 bond->setup_by_slave = 1;
1445 /* enslave device <slave> to bond device <master> */
1446 int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1448 struct bonding *bond = netdev_priv(bond_dev);
1449 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1450 struct slave *new_slave = NULL;
1451 struct netdev_hw_addr *ha;
1452 struct sockaddr addr;
1454 int old_features = bond_dev->features;
1457 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1458 slave_ops->ndo_do_ioctl == NULL) {
1459 pr_warning("%s: Warning: no link monitoring support for %s\n",
1460 bond_dev->name, slave_dev->name);
1463 /* bond must be initialized by bond_open() before enslaving */
1464 if (!(bond_dev->flags & IFF_UP)) {
1465 pr_warning("%s: master_dev is not up in bond_enslave\n",
1469 /* already enslaved */
1470 if (slave_dev->flags & IFF_SLAVE) {
1471 pr_debug("Error, Device was already enslaved\n");
1475 /* vlan challenged mutual exclusion */
1476 /* no need to lock since we're protected by rtnl_lock */
1477 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1478 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1480 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1481 bond_dev->name, slave_dev->name, bond_dev->name);
1484 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1485 bond_dev->name, slave_dev->name,
1486 slave_dev->name, bond_dev->name);
1487 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1490 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1491 if (bond->slave_cnt == 0) {
1492 /* First slave, and it is not VLAN challenged,
1493 * so remove the block of adding VLANs over the bond.
1495 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1500 * Old ifenslave binaries are no longer supported. These can
1501 * be identified with moderate accuracy by the state of the slave:
1502 * the current ifenslave will set the interface down prior to
1503 * enslaving it; the old ifenslave will not.
1505 if ((slave_dev->flags & IFF_UP)) {
1506 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
1509 goto err_undo_flags;
1512 /* set bonding device ether type by slave - bonding netdevices are
1513 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1514 * there is a need to override some of the type dependent attribs/funcs.
1516 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1517 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1519 if (bond->slave_cnt == 0) {
1520 if (bond_dev->type != slave_dev->type) {
1521 pr_debug("%s: change device type from %d to %d\n",
1523 bond_dev->type, slave_dev->type);
1525 res = netdev_bonding_change(bond_dev,
1526 NETDEV_PRE_TYPE_CHANGE);
1527 res = notifier_to_errno(res);
1529 pr_err("%s: refused to change device type\n",
1532 goto err_undo_flags;
1535 /* Flush unicast and multicast addresses */
1536 dev_uc_flush(bond_dev);
1537 dev_mc_flush(bond_dev);
1539 if (slave_dev->type != ARPHRD_ETHER)
1540 bond_setup_by_slave(bond_dev, slave_dev);
1542 ether_setup(bond_dev);
1544 netdev_bonding_change(bond_dev,
1545 NETDEV_POST_TYPE_CHANGE);
1547 } else if (bond_dev->type != slave_dev->type) {
1548 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1550 slave_dev->type, bond_dev->type);
1552 goto err_undo_flags;
1555 if (slave_ops->ndo_set_mac_address == NULL) {
1556 if (bond->slave_cnt == 0) {
1557 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1559 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1560 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1561 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",
1564 goto err_undo_flags;
1568 /* If this is the first slave, then we need to set the master's hardware
1569 * address to be the same as the slave's. */
1570 if (bond->slave_cnt == 0)
1571 memcpy(bond->dev->dev_addr, slave_dev->dev_addr,
1572 slave_dev->addr_len);
1575 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1578 goto err_undo_flags;
1582 * Set the new_slave's queue_id to be zero. Queue ID mapping
1583 * is set via sysfs or module option if desired.
1585 new_slave->queue_id = 0;
1587 /* Save slave's original mtu and then set it to match the bond */
1588 new_slave->original_mtu = slave_dev->mtu;
1589 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1591 pr_debug("Error %d calling dev_set_mtu\n", res);
1596 * Save slave's original ("permanent") mac address for modes
1597 * that need it, and for restoring it upon release, and then
1598 * set it to the master's address
1600 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1602 if (!bond->params.fail_over_mac) {
1604 * Set slave to master's mac address. The application already
1605 * set the master's mac address to that of the first slave
1607 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1608 addr.sa_family = slave_dev->type;
1609 res = dev_set_mac_address(slave_dev, &addr);
1611 pr_debug("Error %d calling set_mac_address\n", res);
1612 goto err_restore_mtu;
1616 res = netdev_set_master(slave_dev, bond_dev);
1618 pr_debug("Error %d calling netdev_set_master\n", res);
1619 goto err_restore_mac;
1621 /* open the slave since the application closed it */
1622 res = dev_open(slave_dev);
1624 pr_debug("Opening slave %s failed\n", slave_dev->name);
1625 goto err_unset_master;
1628 new_slave->dev = slave_dev;
1629 slave_dev->priv_flags |= IFF_BONDING;
1631 if (bond_is_lb(bond)) {
1632 /* bond_alb_init_slave() must be called before all other stages since
1633 * it might fail and we do not want to have to undo everything
1635 res = bond_alb_init_slave(bond, new_slave);
1640 /* If the mode USES_PRIMARY, then the new slave gets the
1641 * master's promisc (and mc) settings only if it becomes the
1642 * curr_active_slave, and that is taken care of later when calling
1643 * bond_change_active()
1645 if (!USES_PRIMARY(bond->params.mode)) {
1646 /* set promiscuity level to new slave */
1647 if (bond_dev->flags & IFF_PROMISC) {
1648 res = dev_set_promiscuity(slave_dev, 1);
1653 /* set allmulti level to new slave */
1654 if (bond_dev->flags & IFF_ALLMULTI) {
1655 res = dev_set_allmulti(slave_dev, 1);
1660 netif_addr_lock_bh(bond_dev);
1661 /* upload master's mc_list to new slave */
1662 netdev_for_each_mc_addr(ha, bond_dev)
1663 dev_mc_add(slave_dev, ha->addr);
1664 netif_addr_unlock_bh(bond_dev);
1667 if (bond->params.mode == BOND_MODE_8023AD) {
1668 /* add lacpdu mc addr to mc list */
1669 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1671 dev_mc_add(slave_dev, lacpdu_multicast);
1674 bond_add_vlans_on_slave(bond, slave_dev);
1676 write_lock_bh(&bond->lock);
1678 bond_attach_slave(bond, new_slave);
1680 new_slave->delay = 0;
1681 new_slave->link_failure_count = 0;
1683 bond_compute_features(bond);
1685 write_unlock_bh(&bond->lock);
1687 read_lock(&bond->lock);
1689 new_slave->last_arp_rx = jiffies;
1691 if (bond->params.miimon && !bond->params.use_carrier) {
1692 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1694 if ((link_reporting == -1) && !bond->params.arp_interval) {
1696 * miimon is set but a bonded network driver
1697 * does not support ETHTOOL/MII and
1698 * arp_interval is not set. Note: if
1699 * use_carrier is enabled, we will never go
1700 * here (because netif_carrier is always
1701 * supported); thus, we don't need to change
1702 * the messages for netif_carrier.
1704 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",
1705 bond_dev->name, slave_dev->name);
1706 } else if (link_reporting == -1) {
1707 /* unable get link status using mii/ethtool */
1708 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",
1709 bond_dev->name, slave_dev->name);
1713 /* check for initial state */
1714 if (!bond->params.miimon ||
1715 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1716 if (bond->params.updelay) {
1717 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1718 new_slave->link = BOND_LINK_BACK;
1719 new_slave->delay = bond->params.updelay;
1721 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1722 new_slave->link = BOND_LINK_UP;
1724 new_slave->jiffies = jiffies;
1726 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1727 new_slave->link = BOND_LINK_DOWN;
1730 if (bond_update_speed_duplex(new_slave) &&
1731 (new_slave->link != BOND_LINK_DOWN)) {
1732 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1733 bond_dev->name, new_slave->dev->name);
1735 if (bond->params.mode == BOND_MODE_8023AD) {
1736 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1741 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1742 /* if there is a primary slave, remember it */
1743 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1744 bond->primary_slave = new_slave;
1745 bond->force_primary = true;
1749 write_lock_bh(&bond->curr_slave_lock);
1751 switch (bond->params.mode) {
1752 case BOND_MODE_ACTIVEBACKUP:
1753 bond_set_slave_inactive_flags(new_slave);
1754 bond_select_active_slave(bond);
1756 case BOND_MODE_8023AD:
1757 /* in 802.3ad mode, the internal mechanism
1758 * will activate the slaves in the selected
1761 bond_set_slave_inactive_flags(new_slave);
1762 /* if this is the first slave */
1763 if (bond->slave_cnt == 1) {
1764 SLAVE_AD_INFO(new_slave).id = 1;
1765 /* Initialize AD with the number of times that the AD timer is called in 1 second
1766 * can be called only after the mac address of the bond is set
1768 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1769 bond->params.lacp_fast);
1771 SLAVE_AD_INFO(new_slave).id =
1772 SLAVE_AD_INFO(new_slave->prev).id + 1;
1775 bond_3ad_bind_slave(new_slave);
1779 new_slave->state = BOND_STATE_ACTIVE;
1780 bond_set_slave_inactive_flags(new_slave);
1781 bond_select_active_slave(bond);
1784 pr_debug("This slave is always active in trunk mode\n");
1786 /* always active in trunk mode */
1787 new_slave->state = BOND_STATE_ACTIVE;
1789 /* In trunking mode there is little meaning to curr_active_slave
1790 * anyway (it holds no special properties of the bond device),
1791 * so we can change it without calling change_active_interface()
1793 if (!bond->curr_active_slave)
1794 bond->curr_active_slave = new_slave;
1797 } /* switch(bond_mode) */
1799 write_unlock_bh(&bond->curr_slave_lock);
1801 bond_set_carrier(bond);
1803 #ifdef CONFIG_NET_POLL_CONTROLLER
1805 * Netpoll and bonding is broken, make sure it is not initialized
1806 * until it is fixed.
1808 if (disable_netpoll) {
1809 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
1811 if (slaves_support_netpoll(bond_dev)) {
1812 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
1813 if (bond_dev->npinfo)
1814 slave_dev->npinfo = bond_dev->npinfo;
1815 } else if (!(bond_dev->priv_flags & IFF_DISABLE_NETPOLL)) {
1816 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
1817 pr_info("New slave device %s does not support netpoll\n",
1819 pr_info("Disabling netpoll support for %s\n", bond_dev->name);
1823 read_unlock(&bond->lock);
1825 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1829 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1830 bond_dev->name, slave_dev->name,
1831 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1832 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1834 /* enslave is successful */
1837 /* Undo stages on error */
1839 dev_close(slave_dev);
1842 netdev_set_master(slave_dev, NULL);
1845 if (!bond->params.fail_over_mac) {
1846 /* XXX TODO - fom follow mode needs to change master's
1847 * MAC if this slave's MAC is in use by the bond, or at
1848 * least print a warning.
1850 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1851 addr.sa_family = slave_dev->type;
1852 dev_set_mac_address(slave_dev, &addr);
1856 dev_set_mtu(slave_dev, new_slave->original_mtu);
1862 bond_dev->features = old_features;
1868 * Try to release the slave device <slave> from the bond device <master>
1869 * It is legal to access curr_active_slave without a lock because all the function
1872 * The rules for slave state should be:
1873 * for Active/Backup:
1874 * Active stays on all backups go down
1875 * for Bonded connections:
1876 * The first up interface should be left on and all others downed.
1878 int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1880 struct bonding *bond = netdev_priv(bond_dev);
1881 struct slave *slave, *oldcurrent;
1882 struct sockaddr addr;
1884 /* slave is not a slave or master is not master of this slave */
1885 if (!(slave_dev->flags & IFF_SLAVE) ||
1886 (slave_dev->master != bond_dev)) {
1887 pr_err("%s: Error: cannot release %s.\n",
1888 bond_dev->name, slave_dev->name);
1892 netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE);
1893 write_lock_bh(&bond->lock);
1895 slave = bond_get_slave_by_dev(bond, slave_dev);
1897 /* not a slave of this bond */
1898 pr_info("%s: %s not enslaved\n",
1899 bond_dev->name, slave_dev->name);
1900 write_unlock_bh(&bond->lock);
1904 if (!bond->params.fail_over_mac) {
1905 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1906 bond->slave_cnt > 1)
1907 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",
1908 bond_dev->name, slave_dev->name,
1910 bond_dev->name, slave_dev->name);
1913 /* Inform AD package of unbinding of slave. */
1914 if (bond->params.mode == BOND_MODE_8023AD) {
1915 /* must be called before the slave is
1916 * detached from the list
1918 bond_3ad_unbind_slave(slave);
1921 pr_info("%s: releasing %s interface %s\n",
1923 (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup",
1926 oldcurrent = bond->curr_active_slave;
1928 bond->current_arp_slave = NULL;
1930 /* release the slave from its bond */
1931 bond_detach_slave(bond, slave);
1933 bond_compute_features(bond);
1935 if (bond->primary_slave == slave)
1936 bond->primary_slave = NULL;
1938 if (oldcurrent == slave)
1939 bond_change_active_slave(bond, NULL);
1941 if (bond_is_lb(bond)) {
1942 /* Must be called only after the slave has been
1943 * detached from the list and the curr_active_slave
1944 * has been cleared (if our_slave == old_current),
1945 * but before a new active slave is selected.
1947 write_unlock_bh(&bond->lock);
1948 bond_alb_deinit_slave(bond, slave);
1949 write_lock_bh(&bond->lock);
1952 if (oldcurrent == slave) {
1954 * Note that we hold RTNL over this sequence, so there
1955 * is no concern that another slave add/remove event
1958 write_unlock_bh(&bond->lock);
1959 read_lock(&bond->lock);
1960 write_lock_bh(&bond->curr_slave_lock);
1962 bond_select_active_slave(bond);
1964 write_unlock_bh(&bond->curr_slave_lock);
1965 read_unlock(&bond->lock);
1966 write_lock_bh(&bond->lock);
1969 if (bond->slave_cnt == 0) {
1970 bond_set_carrier(bond);
1972 /* if the last slave was removed, zero the mac address
1973 * of the master so it will be set by the application
1974 * to the mac address of the first slave
1976 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1979 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1981 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1982 bond_dev->name, bond_dev->name);
1983 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1986 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1987 !bond_has_challenged_slaves(bond)) {
1988 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1989 bond_dev->name, slave_dev->name, bond_dev->name);
1990 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1993 write_unlock_bh(&bond->lock);
1995 /* must do this from outside any spinlocks */
1996 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1998 bond_del_vlans_from_slave(bond, slave_dev);
2000 /* If the mode USES_PRIMARY, then we should only remove its
2001 * promisc and mc settings if it was the curr_active_slave, but that was
2002 * already taken care of above when we detached the slave
2004 if (!USES_PRIMARY(bond->params.mode)) {
2005 /* unset promiscuity level from slave */
2006 if (bond_dev->flags & IFF_PROMISC)
2007 dev_set_promiscuity(slave_dev, -1);
2009 /* unset allmulti level from slave */
2010 if (bond_dev->flags & IFF_ALLMULTI)
2011 dev_set_allmulti(slave_dev, -1);
2013 /* flush master's mc_list from slave */
2014 netif_addr_lock_bh(bond_dev);
2015 bond_mc_list_flush(bond_dev, slave_dev);
2016 netif_addr_unlock_bh(bond_dev);
2019 netdev_set_master(slave_dev, NULL);
2021 #ifdef CONFIG_NET_POLL_CONTROLLER
2022 read_lock_bh(&bond->lock);
2024 /* Make sure netpoll over stays disabled until fixed. */
2025 if (!disable_netpoll)
2026 if (slaves_support_netpoll(bond_dev))
2027 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
2028 read_unlock_bh(&bond->lock);
2029 if (slave_dev->netdev_ops->ndo_netpoll_cleanup)
2030 slave_dev->netdev_ops->ndo_netpoll_cleanup(slave_dev);
2032 slave_dev->npinfo = NULL;
2035 /* close slave before restoring its mac address */
2036 dev_close(slave_dev);
2038 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2039 /* restore original ("permanent") mac address */
2040 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2041 addr.sa_family = slave_dev->type;
2042 dev_set_mac_address(slave_dev, &addr);
2045 dev_set_mtu(slave_dev, slave->original_mtu);
2047 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2048 IFF_SLAVE_INACTIVE | IFF_BONDING |
2053 return 0; /* deletion OK */
2057 * First release a slave and than destroy the bond if no more slaves are left.
2058 * Must be under rtnl_lock when this function is called.
2060 int bond_release_and_destroy(struct net_device *bond_dev,
2061 struct net_device *slave_dev)
2063 struct bonding *bond = netdev_priv(bond_dev);
2066 ret = bond_release(bond_dev, slave_dev);
2067 if ((ret == 0) && (bond->slave_cnt == 0)) {
2068 pr_info("%s: destroying bond %s.\n",
2069 bond_dev->name, bond_dev->name);
2070 unregister_netdevice(bond_dev);
2076 * This function releases all slaves.
2078 static int bond_release_all(struct net_device *bond_dev)
2080 struct bonding *bond = netdev_priv(bond_dev);
2081 struct slave *slave;
2082 struct net_device *slave_dev;
2083 struct sockaddr addr;
2085 write_lock_bh(&bond->lock);
2087 netif_carrier_off(bond_dev);
2089 if (bond->slave_cnt == 0)
2092 bond->current_arp_slave = NULL;
2093 bond->primary_slave = NULL;
2094 bond_change_active_slave(bond, NULL);
2096 while ((slave = bond->first_slave) != NULL) {
2097 /* Inform AD package of unbinding of slave
2098 * before slave is detached from the list.
2100 if (bond->params.mode == BOND_MODE_8023AD)
2101 bond_3ad_unbind_slave(slave);
2103 slave_dev = slave->dev;
2104 bond_detach_slave(bond, slave);
2106 /* now that the slave is detached, unlock and perform
2107 * all the undo steps that should not be called from
2110 write_unlock_bh(&bond->lock);
2112 if (bond_is_lb(bond)) {
2113 /* must be called only after the slave
2114 * has been detached from the list
2116 bond_alb_deinit_slave(bond, slave);
2119 bond_compute_features(bond);
2121 bond_destroy_slave_symlinks(bond_dev, slave_dev);
2122 bond_del_vlans_from_slave(bond, slave_dev);
2124 /* If the mode USES_PRIMARY, then we should only remove its
2125 * promisc and mc settings if it was the curr_active_slave, but that was
2126 * already taken care of above when we detached the slave
2128 if (!USES_PRIMARY(bond->params.mode)) {
2129 /* unset promiscuity level from slave */
2130 if (bond_dev->flags & IFF_PROMISC)
2131 dev_set_promiscuity(slave_dev, -1);
2133 /* unset allmulti level from slave */
2134 if (bond_dev->flags & IFF_ALLMULTI)
2135 dev_set_allmulti(slave_dev, -1);
2137 /* flush master's mc_list from slave */
2138 netif_addr_lock_bh(bond_dev);
2139 bond_mc_list_flush(bond_dev, slave_dev);
2140 netif_addr_unlock_bh(bond_dev);
2143 netdev_set_master(slave_dev, NULL);
2145 /* close slave before restoring its mac address */
2146 dev_close(slave_dev);
2148 if (!bond->params.fail_over_mac) {
2149 /* restore original ("permanent") mac address*/
2150 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2151 addr.sa_family = slave_dev->type;
2152 dev_set_mac_address(slave_dev, &addr);
2155 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2156 IFF_SLAVE_INACTIVE);
2160 /* re-acquire the lock before getting the next slave */
2161 write_lock_bh(&bond->lock);
2164 /* zero the mac address of the master so it will be
2165 * set by the application to the mac address of the
2168 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2171 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2173 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2174 bond_dev->name, bond_dev->name);
2175 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2179 pr_info("%s: released all slaves\n", bond_dev->name);
2182 write_unlock_bh(&bond->lock);
2188 * This function changes the active slave to slave <slave_dev>.
2189 * It returns -EINVAL in the following cases.
2190 * - <slave_dev> is not found in the list.
2191 * - There is not active slave now.
2192 * - <slave_dev> is already active.
2193 * - The link state of <slave_dev> is not BOND_LINK_UP.
2194 * - <slave_dev> is not running.
2195 * In these cases, this function does nothing.
2196 * In the other cases, current_slave pointer is changed and 0 is returned.
2198 static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2200 struct bonding *bond = netdev_priv(bond_dev);
2201 struct slave *old_active = NULL;
2202 struct slave *new_active = NULL;
2205 if (!USES_PRIMARY(bond->params.mode))
2208 /* Verify that master_dev is indeed the master of slave_dev */
2209 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
2212 read_lock(&bond->lock);
2214 read_lock(&bond->curr_slave_lock);
2215 old_active = bond->curr_active_slave;
2216 read_unlock(&bond->curr_slave_lock);
2218 new_active = bond_get_slave_by_dev(bond, slave_dev);
2221 * Changing to the current active: do nothing; return success.
2223 if (new_active && (new_active == old_active)) {
2224 read_unlock(&bond->lock);
2230 (new_active->link == BOND_LINK_UP) &&
2231 IS_UP(new_active->dev)) {
2232 write_lock_bh(&bond->curr_slave_lock);
2233 bond_change_active_slave(bond, new_active);
2234 write_unlock_bh(&bond->curr_slave_lock);
2238 read_unlock(&bond->lock);
2243 static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2245 struct bonding *bond = netdev_priv(bond_dev);
2247 info->bond_mode = bond->params.mode;
2248 info->miimon = bond->params.miimon;
2250 read_lock(&bond->lock);
2251 info->num_slaves = bond->slave_cnt;
2252 read_unlock(&bond->lock);
2257 static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2259 struct bonding *bond = netdev_priv(bond_dev);
2260 struct slave *slave;
2261 int i, res = -ENODEV;
2263 read_lock(&bond->lock);
2265 bond_for_each_slave(bond, slave, i) {
2266 if (i == (int)info->slave_id) {
2268 strcpy(info->slave_name, slave->dev->name);
2269 info->link = slave->link;
2270 info->state = slave->state;
2271 info->link_failure_count = slave->link_failure_count;
2276 read_unlock(&bond->lock);
2281 /*-------------------------------- Monitoring -------------------------------*/
2284 static int bond_miimon_inspect(struct bonding *bond)
2286 struct slave *slave;
2287 int i, link_state, commit = 0;
2288 bool ignore_updelay;
2290 ignore_updelay = !bond->curr_active_slave ? true : false;
2292 bond_for_each_slave(bond, slave, i) {
2293 slave->new_link = BOND_LINK_NOCHANGE;
2295 link_state = bond_check_dev_link(bond, slave->dev, 0);
2297 switch (slave->link) {
2302 slave->link = BOND_LINK_FAIL;
2303 slave->delay = bond->params.downdelay;
2305 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2307 (bond->params.mode ==
2308 BOND_MODE_ACTIVEBACKUP) ?
2309 ((slave->state == BOND_STATE_ACTIVE) ?
2310 "active " : "backup ") : "",
2312 bond->params.downdelay * bond->params.miimon);
2315 case BOND_LINK_FAIL:
2318 * recovered before downdelay expired
2320 slave->link = BOND_LINK_UP;
2321 slave->jiffies = jiffies;
2322 pr_info("%s: link status up again after %d ms for interface %s.\n",
2324 (bond->params.downdelay - slave->delay) *
2325 bond->params.miimon,
2330 if (slave->delay <= 0) {
2331 slave->new_link = BOND_LINK_DOWN;
2339 case BOND_LINK_DOWN:
2343 slave->link = BOND_LINK_BACK;
2344 slave->delay = bond->params.updelay;
2347 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2348 bond->dev->name, slave->dev->name,
2349 ignore_updelay ? 0 :
2350 bond->params.updelay *
2351 bond->params.miimon);
2354 case BOND_LINK_BACK:
2356 slave->link = BOND_LINK_DOWN;
2357 pr_info("%s: link status down again after %d ms for interface %s.\n",
2359 (bond->params.updelay - slave->delay) *
2360 bond->params.miimon,
2369 if (slave->delay <= 0) {
2370 slave->new_link = BOND_LINK_UP;
2372 ignore_updelay = false;
2384 static void bond_miimon_commit(struct bonding *bond)
2386 struct slave *slave;
2389 bond_for_each_slave(bond, slave, i) {
2390 switch (slave->new_link) {
2391 case BOND_LINK_NOCHANGE:
2395 slave->link = BOND_LINK_UP;
2396 slave->jiffies = jiffies;
2398 if (bond->params.mode == BOND_MODE_8023AD) {
2399 /* prevent it from being the active one */
2400 slave->state = BOND_STATE_BACKUP;
2401 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2402 /* make it immediately active */
2403 slave->state = BOND_STATE_ACTIVE;
2404 } else if (slave != bond->primary_slave) {
2405 /* prevent it from being the active one */
2406 slave->state = BOND_STATE_BACKUP;
2409 pr_info("%s: link status definitely up for interface %s.\n",
2410 bond->dev->name, slave->dev->name);
2412 /* notify ad that the link status has changed */
2413 if (bond->params.mode == BOND_MODE_8023AD)
2414 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2416 if (bond_is_lb(bond))
2417 bond_alb_handle_link_change(bond, slave,
2420 if (!bond->curr_active_slave ||
2421 (slave == bond->primary_slave))
2426 case BOND_LINK_DOWN:
2427 if (slave->link_failure_count < UINT_MAX)
2428 slave->link_failure_count++;
2430 slave->link = BOND_LINK_DOWN;
2432 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2433 bond->params.mode == BOND_MODE_8023AD)
2434 bond_set_slave_inactive_flags(slave);
2436 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2437 bond->dev->name, slave->dev->name);
2439 if (bond->params.mode == BOND_MODE_8023AD)
2440 bond_3ad_handle_link_change(slave,
2443 if (bond_is_lb(bond))
2444 bond_alb_handle_link_change(bond, slave,
2447 if (slave == bond->curr_active_slave)
2453 pr_err("%s: invalid new link %d on slave %s\n",
2454 bond->dev->name, slave->new_link,
2456 slave->new_link = BOND_LINK_NOCHANGE;
2463 write_lock_bh(&bond->curr_slave_lock);
2464 bond_select_active_slave(bond);
2465 write_unlock_bh(&bond->curr_slave_lock);
2468 bond_set_carrier(bond);
2474 * Really a wrapper that splits the mii monitor into two phases: an
2475 * inspection, then (if inspection indicates something needs to be done)
2476 * an acquisition of appropriate locks followed by a commit phase to
2477 * implement whatever link state changes are indicated.
2479 void bond_mii_monitor(struct work_struct *work)
2481 struct bonding *bond = container_of(work, struct bonding,
2484 read_lock(&bond->lock);
2485 if (bond->kill_timers)
2488 if (bond->slave_cnt == 0)
2491 if (bond->send_grat_arp) {
2492 read_lock(&bond->curr_slave_lock);
2493 bond_send_gratuitous_arp(bond);
2494 read_unlock(&bond->curr_slave_lock);
2497 if (bond->send_unsol_na) {
2498 read_lock(&bond->curr_slave_lock);
2499 bond_send_unsolicited_na(bond);
2500 read_unlock(&bond->curr_slave_lock);
2503 if (bond_miimon_inspect(bond)) {
2504 read_unlock(&bond->lock);
2506 read_lock(&bond->lock);
2508 bond_miimon_commit(bond);
2510 read_unlock(&bond->lock);
2511 rtnl_unlock(); /* might sleep, hold no other locks */
2512 read_lock(&bond->lock);
2516 if (bond->params.miimon)
2517 queue_delayed_work(bond->wq, &bond->mii_work,
2518 msecs_to_jiffies(bond->params.miimon));
2520 read_unlock(&bond->lock);
2523 static __be32 bond_glean_dev_ip(struct net_device *dev)
2525 struct in_device *idev;
2526 struct in_ifaddr *ifa;
2533 idev = __in_dev_get_rcu(dev);
2537 ifa = idev->ifa_list;
2541 addr = ifa->ifa_local;
2547 static int bond_has_this_ip(struct bonding *bond, __be32 ip)
2549 struct vlan_entry *vlan;
2551 if (ip == bond->master_ip)
2554 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2555 if (ip == vlan->vlan_ip)
2563 * We go to the (large) trouble of VLAN tagging ARP frames because
2564 * switches in VLAN mode (especially if ports are configured as
2565 * "native" to a VLAN) might not pass non-tagged frames.
2567 static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
2569 struct sk_buff *skb;
2571 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2572 slave_dev->name, dest_ip, src_ip, vlan_id);
2574 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2575 NULL, slave_dev->dev_addr, NULL);
2578 pr_err("ARP packet allocation failed\n");
2582 skb = vlan_put_tag(skb, vlan_id);
2584 pr_err("failed to insert VLAN tag\n");
2592 static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2595 __be32 *targets = bond->params.arp_targets;
2596 struct vlan_entry *vlan;
2597 struct net_device *vlan_dev;
2601 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2604 pr_debug("basa: target %x\n", targets[i]);
2606 pr_debug("basa: empty vlan: arp_send\n");
2607 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2608 bond->master_ip, 0);
2613 * If VLANs are configured, we do a route lookup to
2614 * determine which VLAN interface would be used, so we
2615 * can tag the ARP with the proper VLAN tag.
2617 memset(&fl, 0, sizeof(fl));
2618 fl.fl4_dst = targets[i];
2619 fl.fl4_tos = RTO_ONLINK;
2621 rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
2623 if (net_ratelimit()) {
2624 pr_warning("%s: no route to arp_ip_target %pI4\n",
2625 bond->dev->name, &fl.fl4_dst);
2631 * This target is not on a VLAN
2633 if (rt->dst.dev == bond->dev) {
2635 pr_debug("basa: rtdev == bond->dev: arp_send\n");
2636 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2637 bond->master_ip, 0);
2642 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2643 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2644 if (vlan_dev == rt->dst.dev) {
2645 vlan_id = vlan->vlan_id;
2646 pr_debug("basa: vlan match on %s %d\n",
2647 vlan_dev->name, vlan_id);
2654 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2655 vlan->vlan_ip, vlan_id);
2659 if (net_ratelimit()) {
2660 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2661 bond->dev->name, &fl.fl4_dst,
2662 rt->dst.dev ? rt->dst.dev->name : "NULL");
2669 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2670 * for each VLAN above us.
2672 * Caller must hold curr_slave_lock for read or better
2674 static void bond_send_gratuitous_arp(struct bonding *bond)
2676 struct slave *slave = bond->curr_active_slave;
2677 struct vlan_entry *vlan;
2678 struct net_device *vlan_dev;
2680 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2681 bond->dev->name, slave ? slave->dev->name : "NULL");
2683 if (!slave || !bond->send_grat_arp ||
2684 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
2687 bond->send_grat_arp--;
2689 if (bond->master_ip) {
2690 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2691 bond->master_ip, 0);
2697 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2698 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
2699 if (vlan->vlan_ip) {
2700 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2701 vlan->vlan_ip, vlan->vlan_id);
2706 static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
2709 __be32 *targets = bond->params.arp_targets;
2711 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2712 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
2713 &sip, &tip, i, &targets[i],
2714 bond_has_this_ip(bond, tip));
2715 if (sip == targets[i]) {
2716 if (bond_has_this_ip(bond, tip))
2717 slave->last_arp_rx = jiffies;
2723 static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2726 struct slave *slave;
2727 struct bonding *bond;
2728 unsigned char *arp_ptr;
2731 if (dev->priv_flags & IFF_802_1Q_VLAN) {
2733 * When using VLANS and bonding, dev and oriv_dev may be
2734 * incorrect if the physical interface supports VLAN
2735 * acceleration. With this change ARP validation now
2736 * works for hosts only reachable on the VLAN interface.
2738 dev = vlan_dev_real_dev(dev);
2739 orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif);
2742 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2745 bond = netdev_priv(dev);
2746 read_lock(&bond->lock);
2748 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2749 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2750 orig_dev ? orig_dev->name : "NULL");
2752 slave = bond_get_slave_by_dev(bond, orig_dev);
2753 if (!slave || !slave_do_arp_validate(bond, slave))
2756 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
2760 if (arp->ar_hln != dev->addr_len ||
2761 skb->pkt_type == PACKET_OTHERHOST ||
2762 skb->pkt_type == PACKET_LOOPBACK ||
2763 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2764 arp->ar_pro != htons(ETH_P_IP) ||
2768 arp_ptr = (unsigned char *)(arp + 1);
2769 arp_ptr += dev->addr_len;
2770 memcpy(&sip, arp_ptr, 4);
2771 arp_ptr += 4 + dev->addr_len;
2772 memcpy(&tip, arp_ptr, 4);
2774 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2775 bond->dev->name, slave->dev->name, slave->state,
2776 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2780 * Backup slaves won't see the ARP reply, but do come through
2781 * here for each ARP probe (so we swap the sip/tip to validate
2782 * the probe). In a "redundant switch, common router" type of
2783 * configuration, the ARP probe will (hopefully) travel from
2784 * the active, through one switch, the router, then the other
2785 * switch before reaching the backup.
2787 if (slave->state == BOND_STATE_ACTIVE)
2788 bond_validate_arp(bond, slave, sip, tip);
2790 bond_validate_arp(bond, slave, tip, sip);
2793 read_unlock(&bond->lock);
2796 return NET_RX_SUCCESS;
2800 * this function is called regularly to monitor each slave's link
2801 * ensuring that traffic is being sent and received when arp monitoring
2802 * is used in load-balancing mode. if the adapter has been dormant, then an
2803 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2804 * arp monitoring in active backup mode.
2806 void bond_loadbalance_arp_mon(struct work_struct *work)
2808 struct bonding *bond = container_of(work, struct bonding,
2810 struct slave *slave, *oldcurrent;
2811 int do_failover = 0;
2815 read_lock(&bond->lock);
2817 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2819 if (bond->kill_timers)
2822 if (bond->slave_cnt == 0)
2825 read_lock(&bond->curr_slave_lock);
2826 oldcurrent = bond->curr_active_slave;
2827 read_unlock(&bond->curr_slave_lock);
2829 /* see if any of the previous devices are up now (i.e. they have
2830 * xmt and rcv traffic). the curr_active_slave does not come into
2831 * the picture unless it is null. also, slave->jiffies is not needed
2832 * here because we send an arp on each slave and give a slave as
2833 * long as it needs to get the tx/rx within the delta.
2834 * TODO: what about up/down delay in arp mode? it wasn't here before
2837 bond_for_each_slave(bond, slave, i) {
2838 unsigned long trans_start = dev_trans_start(slave->dev);
2840 if (slave->link != BOND_LINK_UP) {
2841 if (time_in_range(jiffies,
2842 trans_start - delta_in_ticks,
2843 trans_start + delta_in_ticks) &&
2844 time_in_range(jiffies,
2845 slave->dev->last_rx - delta_in_ticks,
2846 slave->dev->last_rx + delta_in_ticks)) {
2848 slave->link = BOND_LINK_UP;
2849 slave->state = BOND_STATE_ACTIVE;
2851 /* primary_slave has no meaning in round-robin
2852 * mode. the window of a slave being up and
2853 * curr_active_slave being null after enslaving
2857 pr_info("%s: link status definitely up for interface %s, ",
2862 pr_info("%s: interface %s is now up\n",
2868 /* slave->link == BOND_LINK_UP */
2870 /* not all switches will respond to an arp request
2871 * when the source ip is 0, so don't take the link down
2872 * if we don't know our ip yet
2874 if (!time_in_range(jiffies,
2875 trans_start - delta_in_ticks,
2876 trans_start + 2 * delta_in_ticks) ||
2877 !time_in_range(jiffies,
2878 slave->dev->last_rx - delta_in_ticks,
2879 slave->dev->last_rx + 2 * delta_in_ticks)) {
2881 slave->link = BOND_LINK_DOWN;
2882 slave->state = BOND_STATE_BACKUP;
2884 if (slave->link_failure_count < UINT_MAX)
2885 slave->link_failure_count++;
2887 pr_info("%s: interface %s is now down.\n",
2891 if (slave == oldcurrent)
2896 /* note: if switch is in round-robin mode, all links
2897 * must tx arp to ensure all links rx an arp - otherwise
2898 * links may oscillate or not come up at all; if switch is
2899 * in something like xor mode, there is nothing we can
2900 * do - all replies will be rx'ed on same link causing slaves
2901 * to be unstable during low/no traffic periods
2903 if (IS_UP(slave->dev))
2904 bond_arp_send_all(bond, slave);
2908 write_lock_bh(&bond->curr_slave_lock);
2910 bond_select_active_slave(bond);
2912 write_unlock_bh(&bond->curr_slave_lock);
2916 if (bond->params.arp_interval)
2917 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2919 read_unlock(&bond->lock);
2923 * Called to inspect slaves for active-backup mode ARP monitor link state
2924 * changes. Sets new_link in slaves to specify what action should take
2925 * place for the slave. Returns 0 if no changes are found, >0 if changes
2926 * to link states must be committed.
2928 * Called with bond->lock held for read.
2930 static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
2932 struct slave *slave;
2934 unsigned long trans_start;
2936 bond_for_each_slave(bond, slave, i) {
2937 slave->new_link = BOND_LINK_NOCHANGE;
2939 if (slave->link != BOND_LINK_UP) {
2940 if (time_in_range(jiffies,
2941 slave_last_rx(bond, slave) - delta_in_ticks,
2942 slave_last_rx(bond, slave) + delta_in_ticks)) {
2944 slave->new_link = BOND_LINK_UP;
2952 * Give slaves 2*delta after being enslaved or made
2953 * active. This avoids bouncing, as the last receive
2954 * times need a full ARP monitor cycle to be updated.
2956 if (time_in_range(jiffies,
2957 slave->jiffies - delta_in_ticks,
2958 slave->jiffies + 2 * delta_in_ticks))
2962 * Backup slave is down if:
2963 * - No current_arp_slave AND
2964 * - more than 3*delta since last receive AND
2965 * - the bond has an IP address
2967 * Note: a non-null current_arp_slave indicates
2968 * the curr_active_slave went down and we are
2969 * searching for a new one; under this condition
2970 * we only take the curr_active_slave down - this
2971 * gives each slave a chance to tx/rx traffic
2972 * before being taken out
2974 if (slave->state == BOND_STATE_BACKUP &&
2975 !bond->current_arp_slave &&
2976 !time_in_range(jiffies,
2977 slave_last_rx(bond, slave) - delta_in_ticks,
2978 slave_last_rx(bond, slave) + 3 * delta_in_ticks)) {
2980 slave->new_link = BOND_LINK_DOWN;
2985 * Active slave is down if:
2986 * - more than 2*delta since transmitting OR
2987 * - (more than 2*delta since receive AND
2988 * the bond has an IP address)
2990 trans_start = dev_trans_start(slave->dev);
2991 if ((slave->state == BOND_STATE_ACTIVE) &&
2992 (!time_in_range(jiffies,
2993 trans_start - delta_in_ticks,
2994 trans_start + 2 * delta_in_ticks) ||
2995 !time_in_range(jiffies,
2996 slave_last_rx(bond, slave) - delta_in_ticks,
2997 slave_last_rx(bond, slave) + 2 * delta_in_ticks))) {
2999 slave->new_link = BOND_LINK_DOWN;
3008 * Called to commit link state changes noted by inspection step of
3009 * active-backup mode ARP monitor.
3011 * Called with RTNL and bond->lock for read.
3013 static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
3015 struct slave *slave;
3017 unsigned long trans_start;
3019 bond_for_each_slave(bond, slave, i) {
3020 switch (slave->new_link) {
3021 case BOND_LINK_NOCHANGE:
3025 trans_start = dev_trans_start(slave->dev);
3026 if ((!bond->curr_active_slave &&
3027 time_in_range(jiffies,
3028 trans_start - delta_in_ticks,
3029 trans_start + delta_in_ticks)) ||
3030 bond->curr_active_slave != slave) {
3031 slave->link = BOND_LINK_UP;
3032 bond->current_arp_slave = NULL;
3034 pr_info("%s: link status definitely up for interface %s.\n",
3035 bond->dev->name, slave->dev->name);
3037 if (!bond->curr_active_slave ||
3038 (slave == bond->primary_slave))
3045 case BOND_LINK_DOWN:
3046 if (slave->link_failure_count < UINT_MAX)
3047 slave->link_failure_count++;
3049 slave->link = BOND_LINK_DOWN;
3050 bond_set_slave_inactive_flags(slave);
3052 pr_info("%s: link status definitely down for interface %s, disabling it\n",
3053 bond->dev->name, slave->dev->name);
3055 if (slave == bond->curr_active_slave) {
3056 bond->current_arp_slave = NULL;
3063 pr_err("%s: impossible: new_link %d on slave %s\n",
3064 bond->dev->name, slave->new_link,
3071 write_lock_bh(&bond->curr_slave_lock);
3072 bond_select_active_slave(bond);
3073 write_unlock_bh(&bond->curr_slave_lock);
3076 bond_set_carrier(bond);
3080 * Send ARP probes for active-backup mode ARP monitor.
3082 * Called with bond->lock held for read.
3084 static void bond_ab_arp_probe(struct bonding *bond)
3086 struct slave *slave;
3089 read_lock(&bond->curr_slave_lock);
3091 if (bond->current_arp_slave && bond->curr_active_slave)
3092 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3093 bond->current_arp_slave->dev->name,
3094 bond->curr_active_slave->dev->name);
3096 if (bond->curr_active_slave) {
3097 bond_arp_send_all(bond, bond->curr_active_slave);
3098 read_unlock(&bond->curr_slave_lock);
3102 read_unlock(&bond->curr_slave_lock);
3104 /* if we don't have a curr_active_slave, search for the next available
3105 * backup slave from the current_arp_slave and make it the candidate
3106 * for becoming the curr_active_slave
3109 if (!bond->current_arp_slave) {
3110 bond->current_arp_slave = bond->first_slave;
3111 if (!bond->current_arp_slave)
3115 bond_set_slave_inactive_flags(bond->current_arp_slave);
3117 /* search for next candidate */
3118 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3119 if (IS_UP(slave->dev)) {
3120 slave->link = BOND_LINK_BACK;
3121 bond_set_slave_active_flags(slave);
3122 bond_arp_send_all(bond, slave);
3123 slave->jiffies = jiffies;
3124 bond->current_arp_slave = slave;
3128 /* if the link state is up at this point, we
3129 * mark it down - this can happen if we have
3130 * simultaneous link failures and
3131 * reselect_active_interface doesn't make this
3132 * one the current slave so it is still marked
3133 * up when it is actually down
3135 if (slave->link == BOND_LINK_UP) {
3136 slave->link = BOND_LINK_DOWN;
3137 if (slave->link_failure_count < UINT_MAX)
3138 slave->link_failure_count++;
3140 bond_set_slave_inactive_flags(slave);
3142 pr_info("%s: backup interface %s is now down.\n",
3143 bond->dev->name, slave->dev->name);
3148 void bond_activebackup_arp_mon(struct work_struct *work)
3150 struct bonding *bond = container_of(work, struct bonding,
3154 read_lock(&bond->lock);
3156 if (bond->kill_timers)
3159 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3161 if (bond->slave_cnt == 0)
3164 if (bond->send_grat_arp) {
3165 read_lock(&bond->curr_slave_lock);
3166 bond_send_gratuitous_arp(bond);
3167 read_unlock(&bond->curr_slave_lock);
3170 if (bond->send_unsol_na) {
3171 read_lock(&bond->curr_slave_lock);
3172 bond_send_unsolicited_na(bond);
3173 read_unlock(&bond->curr_slave_lock);
3176 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3177 read_unlock(&bond->lock);
3179 read_lock(&bond->lock);
3181 bond_ab_arp_commit(bond, delta_in_ticks);
3183 read_unlock(&bond->lock);
3185 read_lock(&bond->lock);
3188 bond_ab_arp_probe(bond);
3191 if (bond->params.arp_interval)
3192 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
3194 read_unlock(&bond->lock);
3197 /*------------------------------ proc/seq_file-------------------------------*/
3199 #ifdef CONFIG_PROC_FS
3201 static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3202 __acquires(&dev_base_lock)
3203 __acquires(&bond->lock)
3205 struct bonding *bond = seq->private;
3207 struct slave *slave;
3210 /* make sure the bond won't be taken away */
3211 read_lock(&dev_base_lock);
3212 read_lock(&bond->lock);
3215 return SEQ_START_TOKEN;
3217 bond_for_each_slave(bond, slave, i) {
3225 static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3227 struct bonding *bond = seq->private;
3228 struct slave *slave = v;
3231 if (v == SEQ_START_TOKEN)
3232 return bond->first_slave;
3234 slave = slave->next;
3236 return (slave == bond->first_slave) ? NULL : slave;
3239 static void bond_info_seq_stop(struct seq_file *seq, void *v)
3240 __releases(&bond->lock)
3241 __releases(&dev_base_lock)
3243 struct bonding *bond = seq->private;
3245 read_unlock(&bond->lock);
3246 read_unlock(&dev_base_lock);
3249 static void bond_info_show_master(struct seq_file *seq)
3251 struct bonding *bond = seq->private;
3255 read_lock(&bond->curr_slave_lock);
3256 curr = bond->curr_active_slave;
3257 read_unlock(&bond->curr_slave_lock);
3259 seq_printf(seq, "Bonding Mode: %s",
3260 bond_mode_name(bond->params.mode));
3262 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3263 bond->params.fail_over_mac)
3264 seq_printf(seq, " (fail_over_mac %s)",
3265 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
3267 seq_printf(seq, "\n");
3269 if (bond->params.mode == BOND_MODE_XOR ||
3270 bond->params.mode == BOND_MODE_8023AD) {
3271 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3272 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3273 bond->params.xmit_policy);
3276 if (USES_PRIMARY(bond->params.mode)) {
3277 seq_printf(seq, "Primary Slave: %s",
3278 (bond->primary_slave) ?
3279 bond->primary_slave->dev->name : "None");
3280 if (bond->primary_slave)
3281 seq_printf(seq, " (primary_reselect %s)",
3282 pri_reselect_tbl[bond->params.primary_reselect].modename);
3284 seq_printf(seq, "\nCurrently Active Slave: %s\n",
3285 (curr) ? curr->dev->name : "None");
3288 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3290 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3291 seq_printf(seq, "Up Delay (ms): %d\n",
3292 bond->params.updelay * bond->params.miimon);
3293 seq_printf(seq, "Down Delay (ms): %d\n",
3294 bond->params.downdelay * bond->params.miimon);
3297 /* ARP information */
3298 if (bond->params.arp_interval > 0) {
3300 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3301 bond->params.arp_interval);
3303 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3305 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
3306 if (!bond->params.arp_targets[i])
3309 seq_printf(seq, ",");
3310 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
3313 seq_printf(seq, "\n");
3316 if (bond->params.mode == BOND_MODE_8023AD) {
3317 struct ad_info ad_info;
3319 seq_puts(seq, "\n802.3ad info\n");
3320 seq_printf(seq, "LACP rate: %s\n",
3321 (bond->params.lacp_fast) ? "fast" : "slow");
3322 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3323 ad_select_tbl[bond->params.ad_select].modename);
3325 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3326 seq_printf(seq, "bond %s has no active aggregator\n",
3329 seq_printf(seq, "Active Aggregator Info:\n");
3331 seq_printf(seq, "\tAggregator ID: %d\n",
3332 ad_info.aggregator_id);
3333 seq_printf(seq, "\tNumber of ports: %d\n",
3335 seq_printf(seq, "\tActor Key: %d\n",
3337 seq_printf(seq, "\tPartner Key: %d\n",
3338 ad_info.partner_key);
3339 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3340 ad_info.partner_system);
3345 static void bond_info_show_slave(struct seq_file *seq,
3346 const struct slave *slave)
3348 struct bonding *bond = seq->private;
3350 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3351 seq_printf(seq, "MII Status: %s\n",
3352 (slave->link == BOND_LINK_UP) ? "up" : "down");
3353 seq_printf(seq, "Link Failure Count: %u\n",
3354 slave->link_failure_count);
3356 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
3358 if (bond->params.mode == BOND_MODE_8023AD) {
3359 const struct aggregator *agg
3360 = SLAVE_AD_INFO(slave).port.aggregator;
3363 seq_printf(seq, "Aggregator ID: %d\n",
3364 agg->aggregator_identifier);
3366 seq_puts(seq, "Aggregator ID: N/A\n");
3368 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
3371 static int bond_info_seq_show(struct seq_file *seq, void *v)
3373 if (v == SEQ_START_TOKEN) {
3374 seq_printf(seq, "%s\n", version);
3375 bond_info_show_master(seq);
3377 bond_info_show_slave(seq, v);
3382 static const struct seq_operations bond_info_seq_ops = {
3383 .start = bond_info_seq_start,
3384 .next = bond_info_seq_next,
3385 .stop = bond_info_seq_stop,
3386 .show = bond_info_seq_show,
3389 static int bond_info_open(struct inode *inode, struct file *file)
3391 struct seq_file *seq;
3392 struct proc_dir_entry *proc;
3395 res = seq_open(file, &bond_info_seq_ops);
3397 /* recover the pointer buried in proc_dir_entry data */
3398 seq = file->private_data;
3400 seq->private = proc->data;
3406 static const struct file_operations bond_info_fops = {
3407 .owner = THIS_MODULE,
3408 .open = bond_info_open,
3410 .llseek = seq_lseek,
3411 .release = seq_release,
3414 static void bond_create_proc_entry(struct bonding *bond)
3416 struct net_device *bond_dev = bond->dev;
3417 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3420 bond->proc_entry = proc_create_data(bond_dev->name,
3421 S_IRUGO, bn->proc_dir,
3422 &bond_info_fops, bond);
3423 if (bond->proc_entry == NULL)
3424 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3425 DRV_NAME, bond_dev->name);
3427 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3431 static void bond_remove_proc_entry(struct bonding *bond)
3433 struct net_device *bond_dev = bond->dev;
3434 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3436 if (bn->proc_dir && bond->proc_entry) {
3437 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
3438 memset(bond->proc_file_name, 0, IFNAMSIZ);
3439 bond->proc_entry = NULL;
3443 /* Create the bonding directory under /proc/net, if doesn't exist yet.
3444 * Caller must hold rtnl_lock.
3446 static void __net_init bond_create_proc_dir(struct bond_net *bn)
3448 if (!bn->proc_dir) {
3449 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
3451 pr_warning("Warning: cannot create /proc/net/%s\n",
3456 /* Destroy the bonding directory under /proc/net, if empty.
3457 * Caller must hold rtnl_lock.
3459 static void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
3462 remove_proc_entry(DRV_NAME, bn->net->proc_net);
3463 bn->proc_dir = NULL;
3467 #else /* !CONFIG_PROC_FS */
3469 static void bond_create_proc_entry(struct bonding *bond)
3473 static void bond_remove_proc_entry(struct bonding *bond)
3477 static inline void bond_create_proc_dir(struct bond_net *bn)
3481 static inline void bond_destroy_proc_dir(struct bond_net *bn)
3485 #endif /* CONFIG_PROC_FS */
3488 /*-------------------------- netdev event handling --------------------------*/
3491 * Change device name
3493 static int bond_event_changename(struct bonding *bond)
3495 bond_remove_proc_entry(bond);
3496 bond_create_proc_entry(bond);
3501 static int bond_master_netdev_event(unsigned long event,
3502 struct net_device *bond_dev)
3504 struct bonding *event_bond = netdev_priv(bond_dev);
3507 case NETDEV_CHANGENAME:
3508 return bond_event_changename(event_bond);
3516 static int bond_slave_netdev_event(unsigned long event,
3517 struct net_device *slave_dev)
3519 struct net_device *bond_dev = slave_dev->master;
3520 struct bonding *bond = netdev_priv(bond_dev);
3523 case NETDEV_UNREGISTER:
3525 if (bond->setup_by_slave)
3526 bond_release_and_destroy(bond_dev, slave_dev);
3528 bond_release(bond_dev, slave_dev);
3532 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3533 struct slave *slave;
3535 slave = bond_get_slave_by_dev(bond, slave_dev);
3537 u16 old_speed = slave->speed;
3538 u16 old_duplex = slave->duplex;
3540 bond_update_speed_duplex(slave);
3542 if (bond_is_lb(bond))
3545 if (old_speed != slave->speed)
3546 bond_3ad_adapter_speed_changed(slave);
3547 if (old_duplex != slave->duplex)
3548 bond_3ad_adapter_duplex_changed(slave);
3555 * ... Or is it this?
3558 case NETDEV_CHANGEMTU:
3560 * TODO: Should slaves be allowed to
3561 * independently alter their MTU? For
3562 * an active-backup bond, slaves need
3563 * not be the same type of device, so
3564 * MTUs may vary. For other modes,
3565 * slaves arguably should have the
3566 * same MTUs. To do this, we'd need to
3567 * take over the slave's change_mtu
3568 * function for the duration of their
3572 case NETDEV_CHANGENAME:
3574 * TODO: handle changing the primary's name
3577 case NETDEV_FEAT_CHANGE:
3578 bond_compute_features(bond);
3588 * bond_netdev_event: handle netdev notifier chain events.
3590 * This function receives events for the netdev chain. The caller (an
3591 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
3592 * locks for us to safely manipulate the slave devices (RTNL lock,
3595 static int bond_netdev_event(struct notifier_block *this,
3596 unsigned long event, void *ptr)
3598 struct net_device *event_dev = (struct net_device *)ptr;
3600 pr_debug("event_dev: %s, event: %lx\n",
3601 event_dev ? event_dev->name : "None",
3604 if (!(event_dev->priv_flags & IFF_BONDING))
3607 if (event_dev->flags & IFF_MASTER) {
3608 pr_debug("IFF_MASTER\n");
3609 return bond_master_netdev_event(event, event_dev);
3612 if (event_dev->flags & IFF_SLAVE) {
3613 pr_debug("IFF_SLAVE\n");
3614 return bond_slave_netdev_event(event, event_dev);
3621 * bond_inetaddr_event: handle inetaddr notifier chain events.
3623 * We keep track of device IPs primarily to use as source addresses in
3624 * ARP monitor probes (rather than spewing out broadcasts all the time).
3626 * We track one IP for the main device (if it has one), plus one per VLAN.
3628 static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3630 struct in_ifaddr *ifa = ptr;
3631 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3632 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
3633 struct bonding *bond;
3634 struct vlan_entry *vlan;
3636 list_for_each_entry(bond, &bn->dev_list, bond_list) {
3637 if (bond->dev == event_dev) {
3640 bond->master_ip = ifa->ifa_local;
3643 bond->master_ip = bond_glean_dev_ip(bond->dev);
3650 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
3653 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
3654 if (vlan_dev == event_dev) {
3657 vlan->vlan_ip = ifa->ifa_local;
3661 bond_glean_dev_ip(vlan_dev);
3672 static struct notifier_block bond_netdev_notifier = {
3673 .notifier_call = bond_netdev_event,
3676 static struct notifier_block bond_inetaddr_notifier = {
3677 .notifier_call = bond_inetaddr_event,
3680 /*-------------------------- Packet type handling ---------------------------*/
3682 /* register to receive lacpdus on a bond */
3683 static void bond_register_lacpdu(struct bonding *bond)
3685 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3687 /* initialize packet type */
3688 pk_type->type = PKT_TYPE_LACPDU;
3689 pk_type->dev = bond->dev;
3690 pk_type->func = bond_3ad_lacpdu_recv;
3692 dev_add_pack(pk_type);
3695 /* unregister to receive lacpdus on a bond */
3696 static void bond_unregister_lacpdu(struct bonding *bond)
3698 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3701 void bond_register_arp(struct bonding *bond)
3703 struct packet_type *pt = &bond->arp_mon_pt;
3708 pt->type = htons(ETH_P_ARP);
3709 pt->dev = bond->dev;
3710 pt->func = bond_arp_rcv;
3714 void bond_unregister_arp(struct bonding *bond)
3716 struct packet_type *pt = &bond->arp_mon_pt;
3718 dev_remove_pack(pt);
3722 /*---------------------------- Hashing Policies -----------------------------*/
3725 * Hash for the output device based upon layer 2 and layer 3 data. If
3726 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3728 static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
3730 struct ethhdr *data = (struct ethhdr *)skb->data;
3731 struct iphdr *iph = ip_hdr(skb);
3733 if (skb->protocol == htons(ETH_P_IP)) {
3734 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3735 (data->h_dest[5] ^ data->h_source[5])) % count;
3738 return (data->h_dest[5] ^ data->h_source[5]) % count;
3742 * Hash for the output device based upon layer 3 and layer 4 data. If
3743 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3744 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3746 static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
3748 struct ethhdr *data = (struct ethhdr *)skb->data;
3749 struct iphdr *iph = ip_hdr(skb);
3750 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
3753 if (skb->protocol == htons(ETH_P_IP)) {
3754 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
3755 (iph->protocol == IPPROTO_TCP ||
3756 iph->protocol == IPPROTO_UDP)) {
3757 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
3759 return (layer4_xor ^
3760 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3764 return (data->h_dest[5] ^ data->h_source[5]) % count;
3768 * Hash for the output device based upon layer 2 data
3770 static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
3772 struct ethhdr *data = (struct ethhdr *)skb->data;
3774 return (data->h_dest[5] ^ data->h_source[5]) % count;
3777 /*-------------------------- Device entry points ----------------------------*/
3779 static int bond_open(struct net_device *bond_dev)
3781 struct bonding *bond = netdev_priv(bond_dev);
3783 bond->kill_timers = 0;
3785 INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed);
3787 if (bond_is_lb(bond)) {
3788 /* bond_alb_initialize must be called before the timer
3791 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3792 /* something went wrong - fail the open operation */
3796 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3797 queue_delayed_work(bond->wq, &bond->alb_work, 0);
3800 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3801 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3802 queue_delayed_work(bond->wq, &bond->mii_work, 0);
3805 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3806 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3807 INIT_DELAYED_WORK(&bond->arp_work,
3808 bond_activebackup_arp_mon);
3810 INIT_DELAYED_WORK(&bond->arp_work,
3811 bond_loadbalance_arp_mon);
3813 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3814 if (bond->params.arp_validate)
3815 bond_register_arp(bond);
3818 if (bond->params.mode == BOND_MODE_8023AD) {
3819 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
3820 queue_delayed_work(bond->wq, &bond->ad_work, 0);
3821 /* register to receive LACPDUs */
3822 bond_register_lacpdu(bond);
3823 bond_3ad_initiate_agg_selection(bond, 1);
3829 static int bond_close(struct net_device *bond_dev)
3831 struct bonding *bond = netdev_priv(bond_dev);
3833 if (bond->params.mode == BOND_MODE_8023AD) {
3834 /* Unregister the receive of LACPDUs */
3835 bond_unregister_lacpdu(bond);
3838 if (bond->params.arp_validate)
3839 bond_unregister_arp(bond);
3841 write_lock_bh(&bond->lock);
3843 bond->send_grat_arp = 0;
3844 bond->send_unsol_na = 0;
3846 /* signal timers not to re-arm */
3847 bond->kill_timers = 1;
3849 write_unlock_bh(&bond->lock);
3851 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3852 cancel_delayed_work(&bond->mii_work);
3855 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3856 cancel_delayed_work(&bond->arp_work);
3859 switch (bond->params.mode) {
3860 case BOND_MODE_8023AD:
3861 cancel_delayed_work(&bond->ad_work);
3865 cancel_delayed_work(&bond->alb_work);
3871 if (delayed_work_pending(&bond->mcast_work))
3872 cancel_delayed_work(&bond->mcast_work);
3874 if (bond_is_lb(bond)) {
3875 /* Must be called only after all
3876 * slaves have been released
3878 bond_alb_deinitialize(bond);
3884 static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3885 struct rtnl_link_stats64 *stats)
3887 struct bonding *bond = netdev_priv(bond_dev);
3888 struct rtnl_link_stats64 temp;
3889 struct slave *slave;
3892 memset(stats, 0, sizeof(*stats));
3894 read_lock_bh(&bond->lock);
3896 bond_for_each_slave(bond, slave, i) {
3897 const struct rtnl_link_stats64 *sstats =
3898 dev_get_stats(slave->dev, &temp);
3900 stats->rx_packets += sstats->rx_packets;
3901 stats->rx_bytes += sstats->rx_bytes;
3902 stats->rx_errors += sstats->rx_errors;
3903 stats->rx_dropped += sstats->rx_dropped;
3905 stats->tx_packets += sstats->tx_packets;
3906 stats->tx_bytes += sstats->tx_bytes;
3907 stats->tx_errors += sstats->tx_errors;
3908 stats->tx_dropped += sstats->tx_dropped;
3910 stats->multicast += sstats->multicast;
3911 stats->collisions += sstats->collisions;
3913 stats->rx_length_errors += sstats->rx_length_errors;
3914 stats->rx_over_errors += sstats->rx_over_errors;
3915 stats->rx_crc_errors += sstats->rx_crc_errors;
3916 stats->rx_frame_errors += sstats->rx_frame_errors;
3917 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3918 stats->rx_missed_errors += sstats->rx_missed_errors;
3920 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3921 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3922 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3923 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3924 stats->tx_window_errors += sstats->tx_window_errors;
3927 read_unlock_bh(&bond->lock);
3932 static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3934 struct net_device *slave_dev = NULL;
3935 struct ifbond k_binfo;
3936 struct ifbond __user *u_binfo = NULL;
3937 struct ifslave k_sinfo;
3938 struct ifslave __user *u_sinfo = NULL;
3939 struct mii_ioctl_data *mii = NULL;
3942 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
3954 * We do this again just in case we were called by SIOCGMIIREG
3955 * instead of SIOCGMIIPHY.
3962 if (mii->reg_num == 1) {
3963 struct bonding *bond = netdev_priv(bond_dev);
3965 read_lock(&bond->lock);
3966 read_lock(&bond->curr_slave_lock);
3967 if (netif_carrier_ok(bond->dev))
3968 mii->val_out = BMSR_LSTATUS;
3970 read_unlock(&bond->curr_slave_lock);
3971 read_unlock(&bond->lock);
3975 case BOND_INFO_QUERY_OLD:
3976 case SIOCBONDINFOQUERY:
3977 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3979 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
3982 res = bond_info_query(bond_dev, &k_binfo);
3984 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3988 case BOND_SLAVE_INFO_QUERY_OLD:
3989 case SIOCBONDSLAVEINFOQUERY:
3990 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3992 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
3995 res = bond_slave_info_query(bond_dev, &k_sinfo);
3997 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
4006 if (!capable(CAP_NET_ADMIN))
4009 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
4011 pr_debug("slave_dev=%p:\n", slave_dev);
4016 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
4018 case BOND_ENSLAVE_OLD:
4019 case SIOCBONDENSLAVE:
4020 res = bond_enslave(bond_dev, slave_dev);
4022 case BOND_RELEASE_OLD:
4023 case SIOCBONDRELEASE:
4024 res = bond_release(bond_dev, slave_dev);
4026 case BOND_SETHWADDR_OLD:
4027 case SIOCBONDSETHWADDR:
4028 res = bond_sethwaddr(bond_dev, slave_dev);
4030 case BOND_CHANGE_ACTIVE_OLD:
4031 case SIOCBONDCHANGEACTIVE:
4032 res = bond_ioctl_change_active(bond_dev, slave_dev);
4044 static bool bond_addr_in_mc_list(unsigned char *addr,
4045 struct netdev_hw_addr_list *list,
4048 struct netdev_hw_addr *ha;
4050 netdev_hw_addr_list_for_each(ha, list)
4051 if (!memcmp(ha->addr, addr, addrlen))
4057 static void bond_set_multicast_list(struct net_device *bond_dev)
4059 struct bonding *bond = netdev_priv(bond_dev);
4060 struct netdev_hw_addr *ha;
4064 * Do promisc before checking multicast_mode
4066 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
4068 * FIXME: Need to handle the error when one of the multi-slaves
4071 bond_set_promiscuity(bond, 1);
4074 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
4075 bond_set_promiscuity(bond, -1);
4078 /* set allmulti flag to slaves */
4079 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
4081 * FIXME: Need to handle the error when one of the multi-slaves
4084 bond_set_allmulti(bond, 1);
4087 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
4088 bond_set_allmulti(bond, -1);
4091 read_lock(&bond->lock);
4093 bond->flags = bond_dev->flags;
4095 /* looking for addresses to add to slaves' mc list */
4096 netdev_for_each_mc_addr(ha, bond_dev) {
4097 found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
4098 bond_dev->addr_len);
4100 bond_mc_add(bond, ha->addr);
4103 /* looking for addresses to delete from slaves' list */
4104 netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
4105 found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
4106 bond_dev->addr_len);
4108 bond_mc_del(bond, ha->addr);
4111 /* save master's multicast list */
4112 __hw_addr_flush(&bond->mc_list);
4113 __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
4114 bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
4116 read_unlock(&bond->lock);
4119 static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4121 struct bonding *bond = netdev_priv(dev);
4122 struct slave *slave = bond->first_slave;
4125 const struct net_device_ops *slave_ops
4126 = slave->dev->netdev_ops;
4127 if (slave_ops->ndo_neigh_setup)
4128 return slave_ops->ndo_neigh_setup(slave->dev, parms);
4134 * Change the MTU of all of a master's slaves to match the master
4136 static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4138 struct bonding *bond = netdev_priv(bond_dev);
4139 struct slave *slave, *stop_at;
4143 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
4144 (bond_dev ? bond_dev->name : "None"), new_mtu);
4146 /* Can't hold bond->lock with bh disabled here since
4147 * some base drivers panic. On the other hand we can't
4148 * hold bond->lock without bh disabled because we'll
4149 * deadlock. The only solution is to rely on the fact
4150 * that we're under rtnl_lock here, and the slaves
4151 * list won't change. This doesn't solve the problem
4152 * of setting the slave's MTU while it is
4153 * transmitting, but the assumption is that the base
4154 * driver can handle that.
4156 * TODO: figure out a way to safely iterate the slaves
4157 * list, but without holding a lock around the actual
4158 * call to the base driver.
4161 bond_for_each_slave(bond, slave, i) {
4162 pr_debug("s %p s->p %p c_m %p\n",
4165 slave->dev->netdev_ops->ndo_change_mtu);
4167 res = dev_set_mtu(slave->dev, new_mtu);
4170 /* If we failed to set the slave's mtu to the new value
4171 * we must abort the operation even in ACTIVE_BACKUP
4172 * mode, because if we allow the backup slaves to have
4173 * different mtu values than the active slave we'll
4174 * need to change their mtu when doing a failover. That
4175 * means changing their mtu from timer context, which
4176 * is probably not a good idea.
4178 pr_debug("err %d %s\n", res, slave->dev->name);
4183 bond_dev->mtu = new_mtu;
4188 /* unwind from head to the slave that failed */
4190 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4193 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4195 pr_debug("unwind err %d dev %s\n",
4196 tmp_res, slave->dev->name);
4206 * Note that many devices must be down to change the HW address, and
4207 * downing the master releases all slaves. We can make bonds full of
4208 * bonding devices to test this, however.
4210 static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4212 struct bonding *bond = netdev_priv(bond_dev);
4213 struct sockaddr *sa = addr, tmp_sa;
4214 struct slave *slave, *stop_at;
4218 if (bond->params.mode == BOND_MODE_ALB)
4219 return bond_alb_set_mac_address(bond_dev, addr);
4222 pr_debug("bond=%p, name=%s\n",
4223 bond, bond_dev ? bond_dev->name : "None");
4226 * If fail_over_mac is set to active, do nothing and return
4227 * success. Returning an error causes ifenslave to fail.
4229 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
4232 if (!is_valid_ether_addr(sa->sa_data))
4233 return -EADDRNOTAVAIL;
4235 /* Can't hold bond->lock with bh disabled here since
4236 * some base drivers panic. On the other hand we can't
4237 * hold bond->lock without bh disabled because we'll
4238 * deadlock. The only solution is to rely on the fact
4239 * that we're under rtnl_lock here, and the slaves
4240 * list won't change. This doesn't solve the problem
4241 * of setting the slave's hw address while it is
4242 * transmitting, but the assumption is that the base
4243 * driver can handle that.
4245 * TODO: figure out a way to safely iterate the slaves
4246 * list, but without holding a lock around the actual
4247 * call to the base driver.
4250 bond_for_each_slave(bond, slave, i) {
4251 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
4252 pr_debug("slave %p %s\n", slave, slave->dev->name);
4254 if (slave_ops->ndo_set_mac_address == NULL) {
4256 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
4260 res = dev_set_mac_address(slave->dev, addr);
4262 /* TODO: consider downing the slave
4264 * User should expect communications
4265 * breakage anyway until ARP finish
4268 pr_debug("err %d %s\n", res, slave->dev->name);
4274 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4278 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4279 tmp_sa.sa_family = bond_dev->type;
4281 /* unwind from head to the slave that failed */
4283 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4286 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4288 pr_debug("unwind err %d dev %s\n",
4289 tmp_res, slave->dev->name);
4296 static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4298 struct bonding *bond = netdev_priv(bond_dev);
4299 struct slave *slave, *start_at;
4300 int i, slave_no, res = 1;
4301 struct iphdr *iph = ip_hdr(skb);
4303 read_lock(&bond->lock);
4305 if (!BOND_IS_OK(bond))
4308 * Start with the curr_active_slave that joined the bond as the
4309 * default for sending IGMP traffic. For failover purposes one
4310 * needs to maintain some consistency for the interface that will
4311 * send the join/membership reports. The curr_active_slave found
4312 * will send all of this type of traffic.
4314 if ((iph->protocol == IPPROTO_IGMP) &&
4315 (skb->protocol == htons(ETH_P_IP))) {
4317 read_lock(&bond->curr_slave_lock);
4318 slave = bond->curr_active_slave;
4319 read_unlock(&bond->curr_slave_lock);
4325 * Concurrent TX may collide on rr_tx_counter; we accept
4326 * that as being rare enough not to justify using an
4329 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4331 bond_for_each_slave(bond, slave, i) {
4339 bond_for_each_slave_from(bond, slave, i, start_at) {
4340 if (IS_UP(slave->dev) &&
4341 (slave->link == BOND_LINK_UP) &&
4342 (slave->state == BOND_STATE_ACTIVE)) {
4343 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4350 /* no suitable interface, frame not sent */
4353 read_unlock(&bond->lock);
4354 return NETDEV_TX_OK;
4359 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4360 * the bond has a usable interface.
4362 static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4364 struct bonding *bond = netdev_priv(bond_dev);
4367 read_lock(&bond->lock);
4368 read_lock(&bond->curr_slave_lock);
4370 if (!BOND_IS_OK(bond))
4373 if (!bond->curr_active_slave)
4376 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4380 /* no suitable interface, frame not sent */
4383 read_unlock(&bond->curr_slave_lock);
4384 read_unlock(&bond->lock);
4385 return NETDEV_TX_OK;
4389 * In bond_xmit_xor() , we determine the output device by using a pre-
4390 * determined xmit_hash_policy(), If the selected device is not enabled,
4391 * find the next active slave.
4393 static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4395 struct bonding *bond = netdev_priv(bond_dev);
4396 struct slave *slave, *start_at;
4401 read_lock(&bond->lock);
4403 if (!BOND_IS_OK(bond))
4406 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
4408 bond_for_each_slave(bond, slave, i) {
4416 bond_for_each_slave_from(bond, slave, i, start_at) {
4417 if (IS_UP(slave->dev) &&
4418 (slave->link == BOND_LINK_UP) &&
4419 (slave->state == BOND_STATE_ACTIVE)) {
4420 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4427 /* no suitable interface, frame not sent */
4430 read_unlock(&bond->lock);
4431 return NETDEV_TX_OK;
4435 * in broadcast mode, we send everything to all usable interfaces.
4437 static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4439 struct bonding *bond = netdev_priv(bond_dev);
4440 struct slave *slave, *start_at;
4441 struct net_device *tx_dev = NULL;
4445 read_lock(&bond->lock);
4447 if (!BOND_IS_OK(bond))
4450 read_lock(&bond->curr_slave_lock);
4451 start_at = bond->curr_active_slave;
4452 read_unlock(&bond->curr_slave_lock);
4457 bond_for_each_slave_from(bond, slave, i, start_at) {
4458 if (IS_UP(slave->dev) &&
4459 (slave->link == BOND_LINK_UP) &&
4460 (slave->state == BOND_STATE_ACTIVE)) {
4462 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4464 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4469 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4471 dev_kfree_skb(skb2);
4475 tx_dev = slave->dev;
4480 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4484 /* no suitable interface, frame not sent */
4487 /* frame sent to all suitable interfaces */
4488 read_unlock(&bond->lock);
4489 return NETDEV_TX_OK;
4492 /*------------------------- Device initialization ---------------------------*/
4494 static void bond_set_xmit_hash_policy(struct bonding *bond)
4496 switch (bond->params.xmit_policy) {
4497 case BOND_XMIT_POLICY_LAYER23:
4498 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4500 case BOND_XMIT_POLICY_LAYER34:
4501 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4503 case BOND_XMIT_POLICY_LAYER2:
4505 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4511 * Lookup the slave that corresponds to a qid
4513 static inline int bond_slave_override(struct bonding *bond,
4514 struct sk_buff *skb)
4517 struct slave *slave = NULL;
4518 struct slave *check_slave;
4520 read_lock(&bond->lock);
4522 if (!BOND_IS_OK(bond) || !skb->queue_mapping)
4525 /* Find out if any slaves have the same mapping as this skb. */
4526 bond_for_each_slave(bond, check_slave, i) {
4527 if (check_slave->queue_id == skb->queue_mapping) {
4528 slave = check_slave;
4533 /* If the slave isn't UP, use default transmit policy. */
4534 if (slave && slave->queue_id && IS_UP(slave->dev) &&
4535 (slave->link == BOND_LINK_UP)) {
4536 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4540 read_unlock(&bond->lock);
4544 static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
4547 * This helper function exists to help dev_pick_tx get the correct
4548 * destination queue. Using a helper function skips the a call to
4549 * skb_tx_hash and will put the skbs in the queue we expect on their
4550 * way down to the bonding driver.
4552 return skb->queue_mapping;
4555 static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4557 struct bonding *bond = netdev_priv(dev);
4559 if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
4560 if (!bond_slave_override(bond, skb))
4561 return NETDEV_TX_OK;
4564 switch (bond->params.mode) {
4565 case BOND_MODE_ROUNDROBIN:
4566 return bond_xmit_roundrobin(skb, dev);
4567 case BOND_MODE_ACTIVEBACKUP:
4568 return bond_xmit_activebackup(skb, dev);
4570 return bond_xmit_xor(skb, dev);
4571 case BOND_MODE_BROADCAST:
4572 return bond_xmit_broadcast(skb, dev);
4573 case BOND_MODE_8023AD:
4574 return bond_3ad_xmit_xor(skb, dev);
4577 return bond_alb_xmit(skb, dev);
4579 /* Should never happen, mode already checked */
4580 pr_err("%s: Error: Unknown bonding mode %d\n",
4581 dev->name, bond->params.mode);
4584 return NETDEV_TX_OK;
4590 * set bond mode specific net device operations
4592 void bond_set_mode_ops(struct bonding *bond, int mode)
4594 struct net_device *bond_dev = bond->dev;
4597 case BOND_MODE_ROUNDROBIN:
4599 case BOND_MODE_ACTIVEBACKUP:
4602 bond_set_xmit_hash_policy(bond);
4604 case BOND_MODE_BROADCAST:
4606 case BOND_MODE_8023AD:
4607 bond_set_master_3ad_flags(bond);
4608 bond_set_xmit_hash_policy(bond);
4611 bond_set_master_alb_flags(bond);
4616 /* Should never happen, mode already checked */
4617 pr_err("%s: Error: Unknown bonding mode %d\n",
4618 bond_dev->name, mode);
4623 static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4624 struct ethtool_drvinfo *drvinfo)
4626 strncpy(drvinfo->driver, DRV_NAME, 32);
4627 strncpy(drvinfo->version, DRV_VERSION, 32);
4628 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4631 static const struct ethtool_ops bond_ethtool_ops = {
4632 .get_drvinfo = bond_ethtool_get_drvinfo,
4633 .get_link = ethtool_op_get_link,
4634 .get_tx_csum = ethtool_op_get_tx_csum,
4635 .get_sg = ethtool_op_get_sg,
4636 .get_tso = ethtool_op_get_tso,
4637 .get_ufo = ethtool_op_get_ufo,
4638 .get_flags = ethtool_op_get_flags,
4641 static const struct net_device_ops bond_netdev_ops = {
4642 .ndo_init = bond_init,
4643 .ndo_uninit = bond_uninit,
4644 .ndo_open = bond_open,
4645 .ndo_stop = bond_close,
4646 .ndo_start_xmit = bond_start_xmit,
4647 .ndo_select_queue = bond_select_queue,
4648 .ndo_get_stats64 = bond_get_stats,
4649 .ndo_do_ioctl = bond_do_ioctl,
4650 .ndo_set_multicast_list = bond_set_multicast_list,
4651 .ndo_change_mtu = bond_change_mtu,
4652 .ndo_set_mac_address = bond_set_mac_address,
4653 .ndo_neigh_setup = bond_neigh_setup,
4654 .ndo_vlan_rx_register = bond_vlan_rx_register,
4655 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4656 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4657 #ifdef CONFIG_NET_POLL_CONTROLLER
4658 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4659 .ndo_poll_controller = bond_poll_controller,
4663 static void bond_destructor(struct net_device *bond_dev)
4665 struct bonding *bond = netdev_priv(bond_dev);
4667 destroy_workqueue(bond->wq);
4668 free_netdev(bond_dev);
4671 static void bond_setup(struct net_device *bond_dev)
4673 struct bonding *bond = netdev_priv(bond_dev);
4675 /* initialize rwlocks */
4676 rwlock_init(&bond->lock);
4677 rwlock_init(&bond->curr_slave_lock);
4679 bond->params = bonding_defaults;
4681 /* Initialize pointers */
4682 bond->dev = bond_dev;
4683 INIT_LIST_HEAD(&bond->vlan_list);
4685 /* Initialize the device entry points */
4686 ether_setup(bond_dev);
4687 bond_dev->netdev_ops = &bond_netdev_ops;
4688 bond_dev->ethtool_ops = &bond_ethtool_ops;
4689 bond_set_mode_ops(bond, bond->params.mode);
4691 bond_dev->destructor = bond_destructor;
4693 /* Initialize the device options */
4694 bond_dev->tx_queue_len = 0;
4695 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4696 bond_dev->priv_flags |= IFF_BONDING;
4697 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4699 if (bond->params.arp_interval)
4700 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
4702 /* At first, we block adding VLANs. That's the only way to
4703 * prevent problems that occur when adding VLANs over an
4704 * empty bond. The block will be removed once non-challenged
4705 * slaves are enslaved.
4707 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4709 /* don't acquire bond device's netif_tx_lock when
4711 bond_dev->features |= NETIF_F_LLTX;
4713 /* By default, we declare the bond to be fully
4714 * VLAN hardware accelerated capable. Special
4715 * care is taken in the various xmit functions
4716 * when there are slaves that are not hw accel
4719 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4720 NETIF_F_HW_VLAN_RX |
4721 NETIF_F_HW_VLAN_FILTER);
4723 /* By default, we enable GRO on bonding devices.
4724 * Actual support requires lowlevel drivers are GRO ready.
4726 bond_dev->features |= NETIF_F_GRO;
4729 static void bond_work_cancel_all(struct bonding *bond)
4731 write_lock_bh(&bond->lock);
4732 bond->kill_timers = 1;
4733 write_unlock_bh(&bond->lock);
4735 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4736 cancel_delayed_work(&bond->mii_work);
4738 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4739 cancel_delayed_work(&bond->arp_work);
4741 if (bond->params.mode == BOND_MODE_ALB &&
4742 delayed_work_pending(&bond->alb_work))
4743 cancel_delayed_work(&bond->alb_work);
4745 if (bond->params.mode == BOND_MODE_8023AD &&
4746 delayed_work_pending(&bond->ad_work))
4747 cancel_delayed_work(&bond->ad_work);
4749 if (delayed_work_pending(&bond->mcast_work))
4750 cancel_delayed_work(&bond->mcast_work);
4754 * Destroy a bonding device.
4755 * Must be under rtnl_lock when this function is called.
4757 static void bond_uninit(struct net_device *bond_dev)
4759 struct bonding *bond = netdev_priv(bond_dev);
4760 struct vlan_entry *vlan, *tmp;
4762 bond_netpoll_cleanup(bond_dev);
4764 /* Release the bonded slaves */
4765 bond_release_all(bond_dev);
4767 list_del(&bond->bond_list);
4769 bond_work_cancel_all(bond);
4771 bond_remove_proc_entry(bond);
4773 __hw_addr_flush(&bond->mc_list);
4775 list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
4776 list_del(&vlan->vlan_list);
4781 /*------------------------- Module initialization ---------------------------*/
4784 * Convert string input module parms. Accept either the
4785 * number of the mode or its string name. A bit complicated because
4786 * some mode names are substrings of other names, and calls from sysfs
4787 * may have whitespace in the name (trailing newlines, for example).
4789 int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
4791 int modeint = -1, i, rv;
4792 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4794 for (p = (char *)buf; *p; p++)
4795 if (!(isdigit(*p) || isspace(*p)))
4799 rv = sscanf(buf, "%20s", modestr);
4801 rv = sscanf(buf, "%d", &modeint);
4806 for (i = 0; tbl[i].modename; i++) {
4807 if (modeint == tbl[i].mode)
4809 if (strcmp(modestr, tbl[i].modename) == 0)
4816 static int bond_check_params(struct bond_params *params)
4818 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
4821 * Convert string parameters.
4824 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4825 if (bond_mode == -1) {
4826 pr_err("Error: Invalid bonding mode \"%s\"\n",
4827 mode == NULL ? "NULL" : mode);
4832 if (xmit_hash_policy) {
4833 if ((bond_mode != BOND_MODE_XOR) &&
4834 (bond_mode != BOND_MODE_8023AD)) {
4835 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
4836 bond_mode_name(bond_mode));
4838 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4840 if (xmit_hashtype == -1) {
4841 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
4842 xmit_hash_policy == NULL ? "NULL" :
4850 if (bond_mode != BOND_MODE_8023AD) {
4851 pr_info("lacp_rate param is irrelevant in mode %s\n",
4852 bond_mode_name(bond_mode));
4854 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4855 if (lacp_fast == -1) {
4856 pr_err("Error: Invalid lacp rate \"%s\"\n",
4857 lacp_rate == NULL ? "NULL" : lacp_rate);
4864 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4865 if (params->ad_select == -1) {
4866 pr_err("Error: Invalid ad_select \"%s\"\n",
4867 ad_select == NULL ? "NULL" : ad_select);
4871 if (bond_mode != BOND_MODE_8023AD) {
4872 pr_warning("ad_select param only affects 802.3ad mode\n");
4875 params->ad_select = BOND_AD_STABLE;
4878 if (max_bonds < 0) {
4879 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4880 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4881 max_bonds = BOND_DEFAULT_MAX_BONDS;
4885 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4886 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4887 miimon = BOND_LINK_MON_INTERV;
4891 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4896 if (downdelay < 0) {
4897 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4898 downdelay, INT_MAX);
4902 if ((use_carrier != 0) && (use_carrier != 1)) {
4903 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4908 if (num_grat_arp < 0 || num_grat_arp > 255) {
4909 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
4914 if (num_unsol_na < 0 || num_unsol_na > 255) {
4915 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4920 /* reset values for 802.3ad */
4921 if (bond_mode == BOND_MODE_8023AD) {
4923 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");
4924 pr_warning("Forcing miimon to 100msec\n");
4929 if (tx_queues < 1 || tx_queues > 255) {
4930 pr_warning("Warning: tx_queues (%d) should be between "
4931 "1 and 255, resetting to %d\n",
4932 tx_queues, BOND_DEFAULT_TX_QUEUES);
4933 tx_queues = BOND_DEFAULT_TX_QUEUES;
4936 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4937 pr_warning("Warning: all_slaves_active module parameter (%d), "
4938 "not of valid value (0/1), so it was set to "
4939 "0\n", all_slaves_active);
4940 all_slaves_active = 0;
4943 if (resend_igmp < 0 || resend_igmp > 255) {
4944 pr_warning("Warning: resend_igmp (%d) should be between "
4945 "0 and 255, resetting to %d\n",
4946 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
4947 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4950 /* reset values for TLB/ALB */
4951 if ((bond_mode == BOND_MODE_TLB) ||
4952 (bond_mode == BOND_MODE_ALB)) {
4954 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");
4955 pr_warning("Forcing miimon to 100msec\n");
4960 if (bond_mode == BOND_MODE_ALB) {
4961 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",
4966 if (updelay || downdelay) {
4967 /* just warn the user the up/down delay will have
4968 * no effect since miimon is zero...
4970 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",
4971 updelay, downdelay);
4974 /* don't allow arp monitoring */
4976 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4977 miimon, arp_interval);
4981 if ((updelay % miimon) != 0) {
4982 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4984 (updelay / miimon) * miimon);
4989 if ((downdelay % miimon) != 0) {
4990 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4992 (downdelay / miimon) * miimon);
4995 downdelay /= miimon;
4998 if (arp_interval < 0) {
4999 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
5000 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
5001 arp_interval = BOND_LINK_ARP_INTERV;
5004 for (arp_ip_count = 0;
5005 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
5007 /* not complete check, but should be good enough to
5009 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
5010 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
5011 arp_ip_target[arp_ip_count]);
5014 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
5015 arp_target[arp_ip_count] = ip;
5019 if (arp_interval && !arp_ip_count) {
5020 /* don't allow arping if no arp_ip_target given... */
5021 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
5027 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
5028 pr_err("arp_validate only supported in active-backup mode\n");
5031 if (!arp_interval) {
5032 pr_err("arp_validate requires arp_interval\n");
5036 arp_validate_value = bond_parse_parm(arp_validate,
5038 if (arp_validate_value == -1) {
5039 pr_err("Error: invalid arp_validate \"%s\"\n",
5040 arp_validate == NULL ? "NULL" : arp_validate);
5044 arp_validate_value = 0;
5047 pr_info("MII link monitoring set to %d ms\n", miimon);
5048 } else if (arp_interval) {
5051 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5053 arp_validate_tbl[arp_validate_value].modename,
5056 for (i = 0; i < arp_ip_count; i++)
5057 pr_info(" %s", arp_ip_target[i]);
5061 } else if (max_bonds) {
5062 /* miimon and arp_interval not set, we need one so things
5063 * work as expected, see bonding.txt for details
5065 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");
5068 if (primary && !USES_PRIMARY(bond_mode)) {
5069 /* currently, using a primary only makes sense
5070 * in active backup, TLB or ALB modes
5072 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
5073 primary, bond_mode_name(bond_mode));
5077 if (primary && primary_reselect) {
5078 primary_reselect_value = bond_parse_parm(primary_reselect,
5080 if (primary_reselect_value == -1) {
5081 pr_err("Error: Invalid primary_reselect \"%s\"\n",
5083 NULL ? "NULL" : primary_reselect);
5087 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
5090 if (fail_over_mac) {
5091 fail_over_mac_value = bond_parse_parm(fail_over_mac,
5093 if (fail_over_mac_value == -1) {
5094 pr_err("Error: invalid fail_over_mac \"%s\"\n",
5095 arp_validate == NULL ? "NULL" : arp_validate);
5099 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
5100 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
5102 fail_over_mac_value = BOND_FOM_NONE;
5105 /* fill params struct with the proper values */
5106 params->mode = bond_mode;
5107 params->xmit_policy = xmit_hashtype;
5108 params->miimon = miimon;
5109 params->num_grat_arp = num_grat_arp;
5110 params->num_unsol_na = num_unsol_na;
5111 params->arp_interval = arp_interval;
5112 params->arp_validate = arp_validate_value;
5113 params->updelay = updelay;
5114 params->downdelay = downdelay;
5115 params->use_carrier = use_carrier;
5116 params->lacp_fast = lacp_fast;
5117 params->primary[0] = 0;
5118 params->primary_reselect = primary_reselect_value;
5119 params->fail_over_mac = fail_over_mac_value;
5120 params->tx_queues = tx_queues;
5121 params->all_slaves_active = all_slaves_active;
5122 params->resend_igmp = resend_igmp;
5125 strncpy(params->primary, primary, IFNAMSIZ);
5126 params->primary[IFNAMSIZ - 1] = 0;
5129 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5134 static struct lock_class_key bonding_netdev_xmit_lock_key;
5135 static struct lock_class_key bonding_netdev_addr_lock_key;
5137 static void bond_set_lockdep_class_one(struct net_device *dev,
5138 struct netdev_queue *txq,
5141 lockdep_set_class(&txq->_xmit_lock,
5142 &bonding_netdev_xmit_lock_key);
5145 static void bond_set_lockdep_class(struct net_device *dev)
5147 lockdep_set_class(&dev->addr_list_lock,
5148 &bonding_netdev_addr_lock_key);
5149 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
5153 * Called from registration process
5155 static int bond_init(struct net_device *bond_dev)
5157 struct bonding *bond = netdev_priv(bond_dev);
5158 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
5160 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5162 bond->wq = create_singlethread_workqueue(bond_dev->name);
5166 bond_set_lockdep_class(bond_dev);
5168 netif_carrier_off(bond_dev);
5170 bond_create_proc_entry(bond);
5171 list_add_tail(&bond->bond_list, &bn->dev_list);
5173 bond_prepare_sysfs_group(bond);
5175 __hw_addr_init(&bond->mc_list);
5179 static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
5181 if (tb[IFLA_ADDRESS]) {
5182 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
5184 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
5185 return -EADDRNOTAVAIL;
5190 static struct rtnl_link_ops bond_link_ops __read_mostly = {
5192 .priv_size = sizeof(struct bonding),
5193 .setup = bond_setup,
5194 .validate = bond_validate,
5197 /* Create a new bond based on the specified name and bonding parameters.
5198 * If name is NULL, obtain a suitable "bond%d" name for us.
5199 * Caller must NOT hold rtnl_lock; we need to release it here before we
5200 * set up our sysfs entries.
5202 int bond_create(struct net *net, const char *name)
5204 struct net_device *bond_dev;
5209 bond_dev = alloc_netdev_mq(sizeof(struct bonding), name ? name : "",
5210 bond_setup, tx_queues);
5212 pr_err("%s: eek! can't alloc netdev!\n", name);
5217 dev_net_set(bond_dev, net);
5218 bond_dev->rtnl_link_ops = &bond_link_ops;
5221 res = dev_alloc_name(bond_dev, "bond%d");
5226 res = register_netdevice(bond_dev);
5231 bond_destructor(bond_dev);
5235 static int __net_init bond_net_init(struct net *net)
5237 struct bond_net *bn = net_generic(net, bond_net_id);
5240 INIT_LIST_HEAD(&bn->dev_list);
5242 bond_create_proc_dir(bn);
5247 static void __net_exit bond_net_exit(struct net *net)
5249 struct bond_net *bn = net_generic(net, bond_net_id);
5251 bond_destroy_proc_dir(bn);
5254 static struct pernet_operations bond_net_ops = {
5255 .init = bond_net_init,
5256 .exit = bond_net_exit,
5258 .size = sizeof(struct bond_net),
5261 static int __init bonding_init(void)
5266 pr_info("%s", version);
5268 res = bond_check_params(&bonding_defaults);
5272 res = register_pernet_subsys(&bond_net_ops);
5276 res = rtnl_link_register(&bond_link_ops);
5280 for (i = 0; i < max_bonds; i++) {
5281 res = bond_create(&init_net, NULL);
5286 res = bond_create_sysfs();
5290 register_netdevice_notifier(&bond_netdev_notifier);
5291 register_inetaddr_notifier(&bond_inetaddr_notifier);
5292 bond_register_ipv6_notifier();
5296 rtnl_link_unregister(&bond_link_ops);
5298 unregister_pernet_subsys(&bond_net_ops);
5303 static void __exit bonding_exit(void)
5305 unregister_netdevice_notifier(&bond_netdev_notifier);
5306 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
5307 bond_unregister_ipv6_notifier();
5309 bond_destroy_sysfs();
5311 rtnl_link_unregister(&bond_link_ops);
5312 unregister_pernet_subsys(&bond_net_ops);
5315 module_init(bonding_init);
5316 module_exit(bonding_exit);
5317 MODULE_LICENSE("GPL");
5318 MODULE_VERSION(DRV_VERSION);
5319 MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5320 MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5321 MODULE_ALIAS_RTNL_LINK("bond");