flow_dissector: introduce programable flow_dissector
[deliverable/linux.git] / drivers / net / bonding / bond_main.c
CommitLineData
1da177e4
LT
1/*
2 * originally based on the dummy device.
3 *
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
6 *
7 * bonding.c: an Ethernet Bonding driver
8 *
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
10 * Cisco 5500
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
13 * Linux Bonding
14 * and probably many L2 switches ...
15 *
16 * How it works:
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.
22 *
23 * ifconfig bond0 down
24 * will release all slaves, marking them as down.
25 *
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.
31 *
1da177e4
LT
32 */
33
1da177e4
LT
34#include <linux/kernel.h>
35#include <linux/module.h>
1da177e4
LT
36#include <linux/types.h>
37#include <linux/fcntl.h>
38#include <linux/interrupt.h>
39#include <linux/ptrace.h>
40#include <linux/ioport.h>
41#include <linux/in.h>
169a3e66 42#include <net/ip.h>
1da177e4 43#include <linux/ip.h>
169a3e66
JV
44#include <linux/tcp.h>
45#include <linux/udp.h>
1da177e4
LT
46#include <linux/slab.h>
47#include <linux/string.h>
48#include <linux/init.h>
49#include <linux/timer.h>
50#include <linux/socket.h>
51#include <linux/ctype.h>
52#include <linux/inet.h>
53#include <linux/bitops.h>
3d632c3f 54#include <linux/io.h>
1da177e4 55#include <asm/dma.h>
3d632c3f 56#include <linux/uaccess.h>
1da177e4
LT
57#include <linux/errno.h>
58#include <linux/netdevice.h>
59#include <linux/inetdevice.h>
a816c7c7 60#include <linux/igmp.h>
1da177e4
LT
61#include <linux/etherdevice.h>
62#include <linux/skbuff.h>
63#include <net/sock.h>
64#include <linux/rtnetlink.h>
1da177e4
LT
65#include <linux/smp.h>
66#include <linux/if_ether.h>
67#include <net/arp.h>
68#include <linux/mii.h>
69#include <linux/ethtool.h>
70#include <linux/if_vlan.h>
71#include <linux/if_bonding.h>
b63bb739 72#include <linux/jiffies.h>
e843fa50 73#include <linux/preempt.h>
c3ade5ca 74#include <net/route.h>
457c4cbc 75#include <net/net_namespace.h>
ec87fd3b 76#include <net/netns/generic.h>
5ee31c68 77#include <net/pkt_sched.h>
278b2083 78#include <linux/rculist.h>
1bd758eb 79#include <net/flow_dissector.h>
c158cba3 80#include <net/switchdev.h>
1ef8019b
DM
81#include <net/bonding.h>
82#include <net/bond_3ad.h>
83#include <net/bond_alb.h>
1da177e4 84
73b5a6f2
MB
85#include "bonding_priv.h"
86
1da177e4
LT
87/*---------------------------- Module parameters ----------------------------*/
88
89/* monitor all links that often (in milliseconds). <=0 disables monitoring */
1da177e4
LT
90
91static int max_bonds = BOND_DEFAULT_MAX_BONDS;
bb1d9123 92static int tx_queues = BOND_DEFAULT_TX_QUEUES;
ad246c99 93static int num_peer_notif = 1;
b98d9c66 94static int miimon;
3d632c3f
SH
95static int updelay;
96static int downdelay;
1da177e4 97static int use_carrier = 1;
3d632c3f
SH
98static char *mode;
99static char *primary;
a549952a 100static char *primary_reselect;
3d632c3f 101static char *lacp_rate;
655f8919 102static int min_links;
3d632c3f
SH
103static char *ad_select;
104static char *xmit_hash_policy;
7bdb04ed 105static int arp_interval;
3d632c3f
SH
106static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
107static char *arp_validate;
8599b52e 108static char *arp_all_targets;
3d632c3f 109static char *fail_over_mac;
b07ea07b 110static int all_slaves_active;
d2991f75 111static struct bond_params bonding_defaults;
c2952c31 112static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
73958329 113static int packets_per_slave = 1;
3a7129e5 114static int lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
1da177e4
LT
115
116module_param(max_bonds, int, 0);
117MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
bb1d9123
AG
118module_param(tx_queues, int, 0);
119MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
ad246c99 120module_param_named(num_grat_arp, num_peer_notif, int, 0644);
90e62474
AG
121MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on "
122 "failover event (alias of num_unsol_na)");
ad246c99 123module_param_named(num_unsol_na, num_peer_notif, int, 0644);
90e62474
AG
124MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on "
125 "failover event (alias of num_grat_arp)");
1da177e4
LT
126module_param(miimon, int, 0);
127MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
128module_param(updelay, int, 0);
129MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
130module_param(downdelay, int, 0);
2ac47660
MW
131MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
132 "in milliseconds");
1da177e4 133module_param(use_carrier, int, 0);
2ac47660
MW
134MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
135 "0 for off, 1 for on (default)");
1da177e4 136module_param(mode, charp, 0);
90e62474 137MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, "
2ac47660
MW
138 "1 for active-backup, 2 for balance-xor, "
139 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
140 "6 for balance-alb");
1da177e4
LT
141module_param(primary, charp, 0);
142MODULE_PARM_DESC(primary, "Primary network device to use");
a549952a
JP
143module_param(primary_reselect, charp, 0);
144MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
145 "once it comes up; "
146 "0 for always (default), "
147 "1 for only if speed of primary is "
148 "better, "
149 "2 for only on active slave "
150 "failure");
1da177e4 151module_param(lacp_rate, charp, 0);
90e62474
AG
152MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; "
153 "0 for slow, 1 for fast");
fd989c83 154module_param(ad_select, charp, 0);
90e62474
AG
155MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; "
156 "0 for stable (default), 1 for bandwidth, "
157 "2 for count");
655f8919 158module_param(min_links, int, 0);
159MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier");
160
169a3e66 161module_param(xmit_hash_policy, charp, 0);
90e62474
AG
162MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; "
163 "0 for layer 2 (default), 1 for layer 3+4, "
32819dc1
NA
164 "2 for layer 2+3, 3 for encap layer 2+3, "
165 "4 for encap layer 3+4");
1da177e4
LT
166module_param(arp_interval, int, 0);
167MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
168module_param_array(arp_ip_target, charp, NULL, 0);
169MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966 170module_param(arp_validate, charp, 0);
90e62474
AG
171MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; "
172 "0 for none (default), 1 for active, "
173 "2 for backup, 3 for all");
8599b52e
VF
174module_param(arp_all_targets, charp, 0);
175MODULE_PARM_DESC(arp_all_targets, "fail on any/all arp targets timeout; 0 for any (default), 1 for all");
3915c1e8 176module_param(fail_over_mac, charp, 0);
90e62474
AG
177MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to "
178 "the same MAC; 0 for none (default), "
179 "1 for active, 2 for follow");
ebd8e497 180module_param(all_slaves_active, int, 0);
37b7021d 181MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface "
90e62474 182 "by setting active flag for all slaves; "
ebd8e497 183 "0 for never (default), 1 for always.");
c2952c31 184module_param(resend_igmp, int, 0);
90e62474
AG
185MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on "
186 "link failure");
73958329
NA
187module_param(packets_per_slave, int, 0);
188MODULE_PARM_DESC(packets_per_slave, "Packets to send per slave in balance-rr "
189 "mode; 0 for a random slave, 1 packet per "
190 "slave (default), >1 packets per slave.");
3a7129e5 191module_param(lp_interval, uint, 0);
192MODULE_PARM_DESC(lp_interval, "The number of seconds between instances where "
193 "the bonding driver sends learning packets to "
194 "each slaves peer switch. The default is 1.");
1da177e4
LT
195
196/*----------------------------- Global variables ----------------------------*/
197
e843fa50 198#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a 199atomic_t netpoll_block_tx = ATOMIC_INIT(0);
e843fa50
NH
200#endif
201
f99189b1 202int bond_net_id __read_mostly;
1da177e4 203
3d632c3f
SH
204static __be32 arp_target[BOND_MAX_ARP_TARGETS];
205static int arp_ip_count;
1da177e4 206static int bond_mode = BOND_MODE_ROUNDROBIN;
3d632c3f
SH
207static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
208static int lacp_fast;
1da177e4 209
1da177e4
LT
210/*-------------------------- Forward declarations ---------------------------*/
211
181470fc 212static int bond_init(struct net_device *bond_dev);
c67dfb29 213static void bond_uninit(struct net_device *bond_dev);
5f0c5f73
AG
214static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
215 struct rtnl_link_stats64 *stats);
ee637714 216static void bond_slave_arr_handler(struct work_struct *work);
1da177e4
LT
217
218/*---------------------------- General routines -----------------------------*/
219
bd33acc3 220const char *bond_mode_name(int mode)
1da177e4 221{
77afc92b
HE
222 static const char *names[] = {
223 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
224 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
225 [BOND_MODE_XOR] = "load balancing (xor)",
226 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
3d632c3f 227 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
77afc92b
HE
228 [BOND_MODE_TLB] = "transmit load balancing",
229 [BOND_MODE_ALB] = "adaptive load balancing",
230 };
231
f5280948 232 if (mode < BOND_MODE_ROUNDROBIN || mode > BOND_MODE_ALB)
1da177e4 233 return "unknown";
77afc92b
HE
234
235 return names[mode];
1da177e4
LT
236}
237
238/*---------------------------------- VLAN -----------------------------------*/
239
1da177e4
LT
240/**
241 * bond_dev_queue_xmit - Prepare skb for xmit.
3d632c3f 242 *
1da177e4
LT
243 * @bond: bond device that got this skb for tx.
244 * @skb: hw accel VLAN tagged skb to transmit
245 * @slave_dev: slave that is supposed to xmit this skbuff
1da177e4 246 */
d316dedd 247void bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
3d632c3f 248 struct net_device *slave_dev)
1da177e4 249{
8387451e 250 skb->dev = slave_dev;
374eeb5a 251
5ee31c68 252 BUILD_BUG_ON(sizeof(skb->queue_mapping) !=
df4ab5b3
JP
253 sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping));
254 skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping;
374eeb5a 255
e15c3c22 256 if (unlikely(netpoll_tx_running(bond->dev)))
8a8efa22 257 bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb);
080e4130 258 else
f6dc31a8 259 dev_queue_xmit(skb);
1da177e4
LT
260}
261
547942ca 262/* In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid,
cc0e4070 263 * We don't protect the slave list iteration with a lock because:
1da177e4
LT
264 * a. This operation is performed in IOCTL context,
265 * b. The operation is protected by the RTNL semaphore in the 8021q code,
266 * c. Holding a lock with BH disabled while directly calling a base driver
267 * entry point is generally a BAD idea.
3d632c3f 268 *
1da177e4
LT
269 * The design of synchronization/protection for this operation in the 8021q
270 * module is good for one or more VLAN devices over a single physical device
271 * and cannot be extended for a teaming solution like bonding, so there is a
272 * potential race condition here where a net device from the vlan group might
273 * be referenced (either by a base driver or the 8021q code) while it is being
274 * removed from the system. However, it turns out we're not making matters
275 * worse, and if it works for regular VLAN usage it will work here too.
276*/
277
1da177e4
LT
278/**
279 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
280 * @bond_dev: bonding net device that got called
281 * @vid: vlan id being added
282 */
80d5c368
PM
283static int bond_vlan_rx_add_vid(struct net_device *bond_dev,
284 __be16 proto, u16 vid)
1da177e4 285{
454d7c9b 286 struct bonding *bond = netdev_priv(bond_dev);
81f23b13 287 struct slave *slave, *rollback_slave;
9caff1e7 288 struct list_head *iter;
dec1e90e 289 int res;
1da177e4 290
9caff1e7 291 bond_for_each_slave(bond, slave, iter) {
80d5c368 292 res = vlan_vid_add(slave->dev, proto, vid);
87002b03
JP
293 if (res)
294 goto unwind;
1da177e4
LT
295 }
296
8e586137 297 return 0;
87002b03
JP
298
299unwind:
81f23b13 300 /* unwind to the slave that failed */
9caff1e7 301 bond_for_each_slave(bond, rollback_slave, iter) {
81f23b13
VF
302 if (rollback_slave == slave)
303 break;
304
305 vlan_vid_del(rollback_slave->dev, proto, vid);
306 }
87002b03
JP
307
308 return res;
1da177e4
LT
309}
310
311/**
312 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
313 * @bond_dev: bonding net device that got called
314 * @vid: vlan id being removed
315 */
80d5c368
PM
316static int bond_vlan_rx_kill_vid(struct net_device *bond_dev,
317 __be16 proto, u16 vid)
1da177e4 318{
454d7c9b 319 struct bonding *bond = netdev_priv(bond_dev);
9caff1e7 320 struct list_head *iter;
1da177e4 321 struct slave *slave;
1da177e4 322
9caff1e7 323 bond_for_each_slave(bond, slave, iter)
80d5c368 324 vlan_vid_del(slave->dev, proto, vid);
1da177e4 325
e868b0c9
VF
326 if (bond_is_lb(bond))
327 bond_alb_clear_vlan(bond, vid);
8e586137
JP
328
329 return 0;
1da177e4
LT
330}
331
1da177e4
LT
332/*------------------------------- Link status -------------------------------*/
333
547942ca 334/* Set the carrier state for the master according to the state of its
ff59c456
JV
335 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
336 * do special 802.3ad magic.
337 *
338 * Returns zero if carrier state does not change, nonzero if it does.
339 */
2477bc9a 340int bond_set_carrier(struct bonding *bond)
ff59c456 341{
9caff1e7 342 struct list_head *iter;
ff59c456 343 struct slave *slave;
ff59c456 344
0965a1f3 345 if (!bond_has_slaves(bond))
ff59c456
JV
346 goto down;
347
01844098 348 if (BOND_MODE(bond) == BOND_MODE_8023AD)
ff59c456
JV
349 return bond_3ad_set_carrier(bond);
350
9caff1e7 351 bond_for_each_slave(bond, slave, iter) {
ff59c456
JV
352 if (slave->link == BOND_LINK_UP) {
353 if (!netif_carrier_ok(bond->dev)) {
354 netif_carrier_on(bond->dev);
355 return 1;
356 }
357 return 0;
358 }
359 }
360
361down:
362 if (netif_carrier_ok(bond->dev)) {
363 netif_carrier_off(bond->dev);
364 return 1;
365 }
366 return 0;
367}
368
547942ca 369/* Get link speed and duplex from the slave's base driver
1da177e4 370 * using ethtool. If for some reason the call fails or the
98f41f69 371 * values are invalid, set speed and duplex to -1,
13b95fb7 372 * and return.
1da177e4 373 */
13b95fb7 374static void bond_update_speed_duplex(struct slave *slave)
1da177e4
LT
375{
376 struct net_device *slave_dev = slave->dev;
4bc71cb9 377 struct ethtool_cmd ecmd;
5d30530e 378 u32 slave_speed;
61a44b9c 379 int res;
1da177e4 380
589665f5
DC
381 slave->speed = SPEED_UNKNOWN;
382 slave->duplex = DUPLEX_UNKNOWN;
1da177e4 383
4bc71cb9 384 res = __ethtool_get_settings(slave_dev, &ecmd);
61a44b9c 385 if (res < 0)
13b95fb7 386 return;
1da177e4 387
4bc71cb9 388 slave_speed = ethtool_cmd_speed(&ecmd);
6f92c66f 389 if (slave_speed == 0 || slave_speed == ((__u32) -1))
13b95fb7 390 return;
1da177e4 391
4bc71cb9 392 switch (ecmd.duplex) {
1da177e4
LT
393 case DUPLEX_FULL:
394 case DUPLEX_HALF:
395 break;
396 default:
13b95fb7 397 return;
1da177e4
LT
398 }
399
5d30530e 400 slave->speed = slave_speed;
4bc71cb9 401 slave->duplex = ecmd.duplex;
1da177e4 402
13b95fb7 403 return;
1da177e4
LT
404}
405
07699f9a 406const char *bond_slave_link_status(s8 link)
407{
408 switch (link) {
409 case BOND_LINK_UP:
410 return "up";
411 case BOND_LINK_FAIL:
412 return "going down";
413 case BOND_LINK_DOWN:
414 return "down";
415 case BOND_LINK_BACK:
416 return "going back";
417 default:
418 return "unknown";
419 }
420}
421
547942ca 422/* if <dev> supports MII link status reporting, check its link status.
1da177e4
LT
423 *
424 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
3d632c3f 425 * depending upon the setting of the use_carrier parameter.
1da177e4
LT
426 *
427 * Return either BMSR_LSTATUS, meaning that the link is up (or we
428 * can't tell and just pretend it is), or 0, meaning that the link is
429 * down.
430 *
431 * If reporting is non-zero, instead of faking link up, return -1 if
432 * both ETHTOOL and MII ioctls fail (meaning the device does not
433 * support them). If use_carrier is set, return whatever it says.
434 * It'd be nice if there was a good way to tell if a driver supports
435 * netif_carrier, but there really isn't.
436 */
3d632c3f
SH
437static int bond_check_dev_link(struct bonding *bond,
438 struct net_device *slave_dev, int reporting)
1da177e4 439{
eb7cc59a 440 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
d9d52832 441 int (*ioctl)(struct net_device *, struct ifreq *, int);
1da177e4
LT
442 struct ifreq ifr;
443 struct mii_ioctl_data *mii;
1da177e4 444
6c988853
PG
445 if (!reporting && !netif_running(slave_dev))
446 return 0;
447
eb7cc59a 448 if (bond->params.use_carrier)
1da177e4 449 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
1da177e4 450
29112f4e 451 /* Try to get link status using Ethtool first. */
c772dde3
BH
452 if (slave_dev->ethtool_ops->get_link)
453 return slave_dev->ethtool_ops->get_link(slave_dev) ?
454 BMSR_LSTATUS : 0;
29112f4e 455
3d632c3f 456 /* Ethtool can't be used, fallback to MII ioctls. */
eb7cc59a 457 ioctl = slave_ops->ndo_do_ioctl;
1da177e4 458 if (ioctl) {
547942ca
NA
459 /* TODO: set pointer to correct ioctl on a per team member
460 * bases to make this more efficient. that is, once
461 * we determine the correct ioctl, we will always
462 * call it and not the others for that team
463 * member.
464 */
465
466 /* We cannot assume that SIOCGMIIPHY will also read a
1da177e4
LT
467 * register; not all network drivers (e.g., e100)
468 * support that.
469 */
470
471 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
472 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
473 mii = if_mii(&ifr);
474 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
475 mii->reg_num = MII_BMSR;
3d632c3f
SH
476 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
477 return mii->val_out & BMSR_LSTATUS;
1da177e4
LT
478 }
479 }
480
547942ca 481 /* If reporting, report that either there's no dev->do_ioctl,
61a44b9c 482 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT
483 * cannot report link status). If not reporting, pretend
484 * we're ok.
485 */
3d632c3f 486 return reporting ? -1 : BMSR_LSTATUS;
1da177e4
LT
487}
488
489/*----------------------------- Multicast list ------------------------------*/
490
547942ca 491/* Push the promiscuity flag down to appropriate slaves */
7e1a1ac1 492static int bond_set_promiscuity(struct bonding *bond, int inc)
1da177e4 493{
9caff1e7 494 struct list_head *iter;
7e1a1ac1 495 int err = 0;
9caff1e7 496
ec0865a9 497 if (bond_uses_primary(bond)) {
14056e79 498 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
4740d638 499
4740d638
ED
500 if (curr_active)
501 err = dev_set_promiscuity(curr_active->dev, inc);
1da177e4
LT
502 } else {
503 struct slave *slave;
dec1e90e 504
9caff1e7 505 bond_for_each_slave(bond, slave, iter) {
7e1a1ac1
WC
506 err = dev_set_promiscuity(slave->dev, inc);
507 if (err)
508 return err;
1da177e4
LT
509 }
510 }
7e1a1ac1 511 return err;
1da177e4
LT
512}
513
547942ca 514/* Push the allmulti flag down to all slaves */
7e1a1ac1 515static int bond_set_allmulti(struct bonding *bond, int inc)
1da177e4 516{
9caff1e7 517 struct list_head *iter;
7e1a1ac1 518 int err = 0;
9caff1e7 519
ec0865a9 520 if (bond_uses_primary(bond)) {
14056e79 521 struct slave *curr_active = rtnl_dereference(bond->curr_active_slave);
4740d638 522
4740d638
ED
523 if (curr_active)
524 err = dev_set_allmulti(curr_active->dev, inc);
1da177e4
LT
525 } else {
526 struct slave *slave;
dec1e90e 527
9caff1e7 528 bond_for_each_slave(bond, slave, iter) {
7e1a1ac1
WC
529 err = dev_set_allmulti(slave->dev, inc);
530 if (err)
531 return err;
1da177e4
LT
532 }
533 }
7e1a1ac1 534 return err;
1da177e4
LT
535}
536
547942ca 537/* Retrieve the list of registered multicast addresses for the bonding
5a37e8ca
FL
538 * device and retransmit an IGMP JOIN request to the current active
539 * slave.
540 */
f2369109 541static void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
5a37e8ca 542{
f2369109 543 struct bonding *bond = container_of(work, struct bonding,
544 mcast_work.work);
545
4aa5dee4 546 if (!rtnl_trylock()) {
4beac029 547 queue_delayed_work(bond->wq, &bond->mcast_work, 1);
4aa5dee4 548 return;
5a37e8ca 549 }
4aa5dee4 550 call_netdevice_notifiers(NETDEV_RESEND_IGMP, bond->dev);
5a37e8ca 551
4f5474e7
NA
552 if (bond->igmp_retrans > 1) {
553 bond->igmp_retrans--;
c2952c31 554 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
4f5474e7 555 }
f2369109 556 rtnl_unlock();
5a37e8ca
FL
557}
558
547942ca 559/* Flush bond's hardware addresses from slave */
303d1cbf 560static void bond_hw_addr_flush(struct net_device *bond_dev,
3d632c3f 561 struct net_device *slave_dev)
1da177e4 562{
454d7c9b 563 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 564
303d1cbf
JV
565 dev_uc_unsync(slave_dev, bond_dev);
566 dev_mc_unsync(slave_dev, bond_dev);
1da177e4 567
01844098 568 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1da177e4
LT
569 /* del lacpdu mc addr from mc list */
570 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
571
22bedad3 572 dev_mc_del(slave_dev, lacpdu_multicast);
1da177e4
LT
573 }
574}
575
576/*--------------------------- Active slave change ---------------------------*/
577
303d1cbf 578/* Update the hardware address list and promisc/allmulti for the new and
ec0865a9
VF
579 * old active slaves (if any). Modes that are not using primary keep all
580 * slaves up date at all times; only the modes that use primary need to call
303d1cbf 581 * this function to swap these settings during a failover.
1da177e4 582 */
303d1cbf
JV
583static void bond_hw_addr_swap(struct bonding *bond, struct slave *new_active,
584 struct slave *old_active)
1da177e4 585{
1da177e4 586 if (old_active) {
3d632c3f 587 if (bond->dev->flags & IFF_PROMISC)
1da177e4 588 dev_set_promiscuity(old_active->dev, -1);
1da177e4 589
3d632c3f 590 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 591 dev_set_allmulti(old_active->dev, -1);
1da177e4 592
303d1cbf 593 bond_hw_addr_flush(bond->dev, old_active->dev);
1da177e4
LT
594 }
595
596 if (new_active) {
7e1a1ac1 597 /* FIXME: Signal errors upstream. */
3d632c3f 598 if (bond->dev->flags & IFF_PROMISC)
1da177e4 599 dev_set_promiscuity(new_active->dev, 1);
1da177e4 600
3d632c3f 601 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 602 dev_set_allmulti(new_active->dev, 1);
1da177e4 603
d632ce98 604 netif_addr_lock_bh(bond->dev);
303d1cbf
JV
605 dev_uc_sync(new_active->dev, bond->dev);
606 dev_mc_sync(new_active->dev, bond->dev);
d632ce98 607 netif_addr_unlock_bh(bond->dev);
1da177e4
LT
608 }
609}
610
ae0d6750 611/**
612 * bond_set_dev_addr - clone slave's address to bond
613 * @bond_dev: bond net device
614 * @slave_dev: slave net device
615 *
616 * Should be called with RTNL held.
617 */
618static void bond_set_dev_addr(struct net_device *bond_dev,
619 struct net_device *slave_dev)
620{
76444f50
VF
621 netdev_dbg(bond_dev, "bond_dev=%p slave_dev=%p slave_dev->addr_len=%d\n",
622 bond_dev, slave_dev, slave_dev->addr_len);
ae0d6750 623 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
624 bond_dev->addr_assign_type = NET_ADDR_STOLEN;
625 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev);
626}
627
547942ca 628/* bond_do_fail_over_mac
3915c1e8
JV
629 *
630 * Perform special MAC address swapping for fail_over_mac settings
631 *
1c72cfdc 632 * Called with RTNL
3915c1e8
JV
633 */
634static void bond_do_fail_over_mac(struct bonding *bond,
635 struct slave *new_active,
636 struct slave *old_active)
637{
638 u8 tmp_mac[ETH_ALEN];
639 struct sockaddr saddr;
640 int rv;
641
642 switch (bond->params.fail_over_mac) {
643 case BOND_FOM_ACTIVE:
1c72cfdc 644 if (new_active)
ae0d6750 645 bond_set_dev_addr(bond->dev, new_active->dev);
3915c1e8
JV
646 break;
647 case BOND_FOM_FOLLOW:
547942ca 648 /* if new_active && old_active, swap them
3915c1e8
JV
649 * if just old_active, do nothing (going to no active slave)
650 * if just new_active, set new_active to bond's MAC
651 */
652 if (!new_active)
653 return;
654
3915c1e8 655 if (old_active) {
ada0f863 656 ether_addr_copy(tmp_mac, new_active->dev->dev_addr);
2a7c183b
JP
657 ether_addr_copy(saddr.sa_data,
658 old_active->dev->dev_addr);
3915c1e8
JV
659 saddr.sa_family = new_active->dev->type;
660 } else {
ada0f863 661 ether_addr_copy(saddr.sa_data, bond->dev->dev_addr);
3915c1e8
JV
662 saddr.sa_family = bond->dev->type;
663 }
664
665 rv = dev_set_mac_address(new_active->dev, &saddr);
666 if (rv) {
76444f50
VF
667 netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
668 -rv, new_active->dev->name);
3915c1e8
JV
669 goto out;
670 }
671
672 if (!old_active)
673 goto out;
674
ada0f863 675 ether_addr_copy(saddr.sa_data, tmp_mac);
3915c1e8
JV
676 saddr.sa_family = old_active->dev->type;
677
678 rv = dev_set_mac_address(old_active->dev, &saddr);
679 if (rv)
76444f50
VF
680 netdev_err(bond->dev, "Error %d setting MAC of slave %s\n",
681 -rv, new_active->dev->name);
3915c1e8 682out:
3915c1e8
JV
683 break;
684 default:
76444f50
VF
685 netdev_err(bond->dev, "bond_do_fail_over_mac impossible: bad policy %d\n",
686 bond->params.fail_over_mac);
3915c1e8
JV
687 break;
688 }
689
690}
691
a549952a
JP
692static bool bond_should_change_active(struct bonding *bond)
693{
059b47e8 694 struct slave *prim = rtnl_dereference(bond->primary_slave);
1c72cfdc 695 struct slave *curr = rtnl_dereference(bond->curr_active_slave);
a549952a
JP
696
697 if (!prim || !curr || curr->link != BOND_LINK_UP)
698 return true;
699 if (bond->force_primary) {
700 bond->force_primary = false;
701 return true;
702 }
703 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
704 (prim->speed < curr->speed ||
705 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
706 return false;
707 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
708 return false;
709 return true;
710}
3915c1e8 711
1da177e4
LT
712/**
713 * find_best_interface - select the best available slave to be the active one
714 * @bond: our bonding struct
1da177e4
LT
715 */
716static struct slave *bond_find_best_slave(struct bonding *bond)
717{
059b47e8 718 struct slave *slave, *bestslave = NULL, *primary;
77140d29 719 struct list_head *iter;
1da177e4 720 int mintime = bond->params.updelay;
1da177e4 721
059b47e8
NA
722 primary = rtnl_dereference(bond->primary_slave);
723 if (primary && primary->link == BOND_LINK_UP &&
77140d29 724 bond_should_change_active(bond))
059b47e8 725 return primary;
1da177e4 726
77140d29
VF
727 bond_for_each_slave(bond, slave, iter) {
728 if (slave->link == BOND_LINK_UP)
729 return slave;
b6adc610 730 if (slave->link == BOND_LINK_BACK && bond_slave_is_up(slave) &&
77140d29
VF
731 slave->delay < mintime) {
732 mintime = slave->delay;
733 bestslave = slave;
1da177e4
LT
734 }
735 }
736
737 return bestslave;
738}
739
ad246c99
BH
740static bool bond_should_notify_peers(struct bonding *bond)
741{
4cb4f97b 742 struct slave *slave;
743
744 rcu_read_lock();
745 slave = rcu_dereference(bond->curr_active_slave);
746 rcu_read_unlock();
ad246c99 747
76444f50
VF
748 netdev_dbg(bond->dev, "bond_should_notify_peers: slave %s\n",
749 slave ? slave->dev->name : "NULL");
ad246c99
BH
750
751 if (!slave || !bond->send_peer_notif ||
752 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
753 return false;
754
ad246c99
BH
755 return true;
756}
757
1da177e4
LT
758/**
759 * change_active_interface - change the active slave into the specified one
760 * @bond: our bonding struct
761 * @new: the new slave to make the active one
762 *
763 * Set the new slave to the bond's settings and unset them on the old
764 * curr_active_slave.
765 * Setting include flags, mc-list, promiscuity, allmulti, etc.
766 *
767 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
768 * because it is apparently the best available slave we have, even though its
769 * updelay hasn't timed out yet.
770 *
1c72cfdc 771 * Caller must hold RTNL.
1da177e4 772 */
a77b5325 773void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4 774{
4740d638
ED
775 struct slave *old_active;
776
1c72cfdc
NA
777 ASSERT_RTNL();
778
779 old_active = rtnl_dereference(bond->curr_active_slave);
1da177e4 780
3d632c3f 781 if (old_active == new_active)
1da177e4 782 return;
1da177e4
LT
783
784 if (new_active) {
8e603460 785 new_active->last_link_up = jiffies;
b2220cad 786
1da177e4 787 if (new_active->link == BOND_LINK_BACK) {
ec0865a9 788 if (bond_uses_primary(bond)) {
76444f50
VF
789 netdev_info(bond->dev, "making interface %s the new active one %d ms earlier\n",
790 new_active->dev->name,
791 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1da177e4
LT
792 }
793
794 new_active->delay = 0;
69a2338e 795 bond_set_slave_link_state(new_active, BOND_LINK_UP);
1da177e4 796
01844098 797 if (BOND_MODE(bond) == BOND_MODE_8023AD)
1da177e4 798 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1da177e4 799
58402054 800 if (bond_is_lb(bond))
1da177e4 801 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1da177e4 802 } else {
ec0865a9 803 if (bond_uses_primary(bond)) {
76444f50
VF
804 netdev_info(bond->dev, "making interface %s the new active one\n",
805 new_active->dev->name);
1da177e4
LT
806 }
807 }
808 }
809
ec0865a9 810 if (bond_uses_primary(bond))
303d1cbf 811 bond_hw_addr_swap(bond, new_active, old_active);
1da177e4 812
58402054 813 if (bond_is_lb(bond)) {
1da177e4 814 bond_alb_handle_active_change(bond, new_active);
8f903c70 815 if (old_active)
5e5b0665 816 bond_set_slave_inactive_flags(old_active,
817 BOND_SLAVE_NOTIFY_NOW);
8f903c70 818 if (new_active)
5e5b0665 819 bond_set_slave_active_flags(new_active,
820 BOND_SLAVE_NOTIFY_NOW);
1da177e4 821 } else {
278b2083 822 rcu_assign_pointer(bond->curr_active_slave, new_active);
1da177e4 823 }
c3ade5ca 824
01844098 825 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP) {
3d632c3f 826 if (old_active)
5e5b0665 827 bond_set_slave_inactive_flags(old_active,
828 BOND_SLAVE_NOTIFY_NOW);
c3ade5ca
JV
829
830 if (new_active) {
ad246c99
BH
831 bool should_notify_peers = false;
832
5e5b0665 833 bond_set_slave_active_flags(new_active,
834 BOND_SLAVE_NOTIFY_NOW);
2ab82852 835
709f8a45
OG
836 if (bond->params.fail_over_mac)
837 bond_do_fail_over_mac(bond, new_active,
838 old_active);
3915c1e8 839
ad246c99
BH
840 if (netif_running(bond->dev)) {
841 bond->send_peer_notif =
842 bond->params.num_peer_notif;
843 should_notify_peers =
844 bond_should_notify_peers(bond);
845 }
846
b7bc2a5b 847 call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev);
ad246c99 848 if (should_notify_peers)
b7bc2a5b
AW
849 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
850 bond->dev);
7893b249 851 }
c3ade5ca 852 }
a2fd940f 853
5a37e8ca 854 /* resend IGMP joins since active slave has changed or
94265cf5
FL
855 * all were sent on curr_active_slave.
856 * resend only if bond is brought up with the affected
547942ca
NA
857 * bonding modes and the retransmission is enabled
858 */
94265cf5 859 if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) &&
ec0865a9 860 ((bond_uses_primary(bond) && new_active) ||
01844098 861 BOND_MODE(bond) == BOND_MODE_ROUNDROBIN)) {
c2952c31 862 bond->igmp_retrans = bond->params.resend_igmp;
4beac029 863 queue_delayed_work(bond->wq, &bond->mcast_work, 1);
a2fd940f 864 }
1da177e4
LT
865}
866
867/**
868 * bond_select_active_slave - select a new active slave, if needed
869 * @bond: our bonding struct
870 *
3d632c3f 871 * This functions should be called when one of the following occurs:
1da177e4
LT
872 * - The old curr_active_slave has been released or lost its link.
873 * - The primary_slave has got its link back.
874 * - A slave has got its link back and there's no old curr_active_slave.
875 *
1c72cfdc 876 * Caller must hold RTNL.
1da177e4 877 */
a77b5325 878void bond_select_active_slave(struct bonding *bond)
1da177e4
LT
879{
880 struct slave *best_slave;
ff59c456 881 int rv;
1da177e4 882
e0974585
NA
883 ASSERT_RTNL();
884
1da177e4 885 best_slave = bond_find_best_slave(bond);
1c72cfdc 886 if (best_slave != rtnl_dereference(bond->curr_active_slave)) {
1da177e4 887 bond_change_active_slave(bond, best_slave);
ff59c456
JV
888 rv = bond_set_carrier(bond);
889 if (!rv)
890 return;
891
892 if (netif_carrier_ok(bond->dev)) {
76444f50 893 netdev_info(bond->dev, "first active interface up!\n");
ff59c456 894 } else {
76444f50 895 netdev_info(bond->dev, "now running without any active interface!\n");
ff59c456 896 }
1da177e4
LT
897 }
898}
899
f6dc31a8 900#ifdef CONFIG_NET_POLL_CONTROLLER
8a8efa22 901static inline int slave_enable_netpoll(struct slave *slave)
f6dc31a8 902{
8a8efa22
AW
903 struct netpoll *np;
904 int err = 0;
f6dc31a8 905
a8779ec1 906 np = kzalloc(sizeof(*np), GFP_KERNEL);
8a8efa22
AW
907 err = -ENOMEM;
908 if (!np)
909 goto out;
910
a8779ec1 911 err = __netpoll_setup(np, slave->dev);
8a8efa22
AW
912 if (err) {
913 kfree(np);
914 goto out;
f6dc31a8 915 }
8a8efa22
AW
916 slave->np = np;
917out:
918 return err;
919}
920static inline void slave_disable_netpoll(struct slave *slave)
921{
922 struct netpoll *np = slave->np;
923
924 if (!np)
925 return;
926
927 slave->np = NULL;
2cde6acd 928 __netpoll_free_async(np);
8a8efa22 929}
f6dc31a8
WC
930
931static void bond_poll_controller(struct net_device *bond_dev)
932{
616f4541
MB
933 struct bonding *bond = netdev_priv(bond_dev);
934 struct slave *slave = NULL;
935 struct list_head *iter;
936 struct ad_info ad_info;
937 struct netpoll_info *ni;
938 const struct net_device_ops *ops;
939
940 if (BOND_MODE(bond) == BOND_MODE_8023AD)
941 if (bond_3ad_get_active_agg_info(bond, &ad_info))
942 return;
943
944 rcu_read_lock_bh();
945 bond_for_each_slave_rcu(bond, slave, iter) {
946 ops = slave->dev->netdev_ops;
947 if (!bond_slave_is_up(slave) || !ops->ndo_poll_controller)
948 continue;
949
950 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
951 struct aggregator *agg =
952 SLAVE_AD_INFO(slave)->port.aggregator;
953
954 if (agg &&
955 agg->aggregator_identifier != ad_info.aggregator_id)
956 continue;
957 }
958
959 ni = rcu_dereference_bh(slave->dev->npinfo);
960 if (down_trylock(&ni->dev_lock))
961 continue;
962 ops->ndo_poll_controller(slave->dev);
963 up(&ni->dev_lock);
964 }
965 rcu_read_unlock_bh();
8a8efa22
AW
966}
967
c4cdef9b 968static void bond_netpoll_cleanup(struct net_device *bond_dev)
8a8efa22 969{
c4cdef9b 970 struct bonding *bond = netdev_priv(bond_dev);
9caff1e7 971 struct list_head *iter;
c2355e1a 972 struct slave *slave;
c2355e1a 973
9caff1e7 974 bond_for_each_slave(bond, slave, iter)
b6adc610 975 if (bond_slave_is_up(slave))
8a8efa22 976 slave_disable_netpoll(slave);
f6dc31a8 977}
8a8efa22 978
a8779ec1 979static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni)
8a8efa22
AW
980{
981 struct bonding *bond = netdev_priv(dev);
9caff1e7 982 struct list_head *iter;
f6dc31a8 983 struct slave *slave;
dec1e90e 984 int err = 0;
f6dc31a8 985
9caff1e7 986 bond_for_each_slave(bond, slave, iter) {
8a8efa22
AW
987 err = slave_enable_netpoll(slave);
988 if (err) {
c4cdef9b 989 bond_netpoll_cleanup(dev);
8a8efa22 990 break;
f6dc31a8
WC
991 }
992 }
8a8efa22 993 return err;
f6dc31a8 994}
8a8efa22
AW
995#else
996static inline int slave_enable_netpoll(struct slave *slave)
997{
998 return 0;
999}
1000static inline void slave_disable_netpoll(struct slave *slave)
1001{
1002}
f6dc31a8
WC
1003static void bond_netpoll_cleanup(struct net_device *bond_dev)
1004{
1005}
f6dc31a8
WC
1006#endif
1007
1da177e4
LT
1008/*---------------------------------- IOCTL ----------------------------------*/
1009
c8f44aff 1010static netdev_features_t bond_fix_features(struct net_device *dev,
9b7b165a 1011 netdev_features_t features)
8531c5ff 1012{
b2a103e6 1013 struct bonding *bond = netdev_priv(dev);
9caff1e7 1014 struct list_head *iter;
c8f44aff 1015 netdev_features_t mask;
9b7b165a 1016 struct slave *slave;
b63365a2 1017
7889cbee 1018 mask = features;
c158cba3 1019
b63365a2 1020 features &= ~NETIF_F_ONE_FOR_ALL;
b2a103e6 1021 features |= NETIF_F_ALL_FOR_ALL;
7f353bf2 1022
9caff1e7 1023 bond_for_each_slave(bond, slave, iter) {
b63365a2
HX
1024 features = netdev_increment_features(features,
1025 slave->dev->features,
b2a103e6
MM
1026 mask);
1027 }
b0ce3508 1028 features = netdev_add_tso_features(features, mask);
b2a103e6 1029
b2a103e6
MM
1030 return features;
1031}
1032
62f2a3a4
MM
1033#define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \
1034 NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \
1035 NETIF_F_HIGHDMA | NETIF_F_LRO)
b2a103e6 1036
5a7baa78 1037#define BOND_ENC_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | NETIF_F_RXCSUM |\
24f87d4c 1038 NETIF_F_TSO)
5a7baa78 1039
b2a103e6
MM
1040static void bond_compute_features(struct bonding *bond)
1041{
02875878
ED
1042 unsigned int dst_release_flag = IFF_XMIT_DST_RELEASE |
1043 IFF_XMIT_DST_RELEASE_PERM;
c8f44aff 1044 netdev_features_t vlan_features = BOND_VLAN_FEATURES;
5a7baa78 1045 netdev_features_t enc_features = BOND_ENC_FEATURES;
9caff1e7
VF
1046 struct net_device *bond_dev = bond->dev;
1047 struct list_head *iter;
1048 struct slave *slave;
b2a103e6 1049 unsigned short max_hard_header_len = ETH_HLEN;
0e376bd0
SB
1050 unsigned int gso_max_size = GSO_MAX_SIZE;
1051 u16 gso_max_segs = GSO_MAX_SEGS;
b2a103e6 1052
0965a1f3 1053 if (!bond_has_slaves(bond))
b2a103e6 1054 goto done;
a9b3ace4 1055 vlan_features &= NETIF_F_ALL_FOR_ALL;
b2a103e6 1056
9caff1e7 1057 bond_for_each_slave(bond, slave, iter) {
278339a4 1058 vlan_features = netdev_increment_features(vlan_features,
b2a103e6
MM
1059 slave->dev->vlan_features, BOND_VLAN_FEATURES);
1060
5a7baa78
OG
1061 enc_features = netdev_increment_features(enc_features,
1062 slave->dev->hw_enc_features,
1063 BOND_ENC_FEATURES);
b6fe83e9 1064 dst_release_flag &= slave->dev->priv_flags;
54ef3137
JV
1065 if (slave->dev->hard_header_len > max_hard_header_len)
1066 max_hard_header_len = slave->dev->hard_header_len;
0e376bd0
SB
1067
1068 gso_max_size = min(gso_max_size, slave->dev->gso_max_size);
1069 gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs);
54ef3137 1070 }
8531c5ff 1071
b63365a2 1072done:
b2a103e6 1073 bond_dev->vlan_features = vlan_features;
24f87d4c 1074 bond_dev->hw_enc_features = enc_features | NETIF_F_GSO_ENCAP_ALL;
54ef3137 1075 bond_dev->hard_header_len = max_hard_header_len;
0e376bd0
SB
1076 bond_dev->gso_max_segs = gso_max_segs;
1077 netif_set_gso_max_size(bond_dev, gso_max_size);
8531c5ff 1078
02875878
ED
1079 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
1080 if ((bond_dev->priv_flags & IFF_XMIT_DST_RELEASE_PERM) &&
1081 dst_release_flag == (IFF_XMIT_DST_RELEASE | IFF_XMIT_DST_RELEASE_PERM))
1082 bond_dev->priv_flags |= IFF_XMIT_DST_RELEASE;
b6fe83e9 1083
b2a103e6 1084 netdev_change_features(bond_dev);
8531c5ff
AK
1085}
1086
872254dd
MS
1087static void bond_setup_by_slave(struct net_device *bond_dev,
1088 struct net_device *slave_dev)
1089{
00829823 1090 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS
1091
1092 bond_dev->type = slave_dev->type;
1093 bond_dev->hard_header_len = slave_dev->hard_header_len;
1094 bond_dev->addr_len = slave_dev->addr_len;
1095
1096 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1097 slave_dev->addr_len);
1098}
1099
5b2c4dd2 1100/* On bonding slaves other than the currently active slave, suppress
3aba891d 1101 * duplicates except for alb non-mcast/bcast.
5b2c4dd2
JP
1102 */
1103static bool bond_should_deliver_exact_match(struct sk_buff *skb,
0bd80dad
JP
1104 struct slave *slave,
1105 struct bonding *bond)
5b2c4dd2 1106{
2d7011ca 1107 if (bond_is_slave_inactive(slave)) {
01844098 1108 if (BOND_MODE(bond) == BOND_MODE_ALB &&
5b2c4dd2
JP
1109 skb->pkt_type != PACKET_BROADCAST &&
1110 skb->pkt_type != PACKET_MULTICAST)
5b2c4dd2 1111 return false;
5b2c4dd2
JP
1112 return true;
1113 }
1114 return false;
1115}
1116
8a4eb573 1117static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb)
5b2c4dd2 1118{
8a4eb573 1119 struct sk_buff *skb = *pskb;
f1c1775a 1120 struct slave *slave;
0bd80dad 1121 struct bonding *bond;
de063b70
ED
1122 int (*recv_probe)(const struct sk_buff *, struct bonding *,
1123 struct slave *);
13a8e0c8 1124 int ret = RX_HANDLER_ANOTHER;
5b2c4dd2 1125
8a4eb573
JP
1126 skb = skb_share_check(skb, GFP_ATOMIC);
1127 if (unlikely(!skb))
1128 return RX_HANDLER_CONSUMED;
1129
1130 *pskb = skb;
5b2c4dd2 1131
35d48903
JP
1132 slave = bond_slave_get_rcu(skb->dev);
1133 bond = slave->bond;
0bd80dad 1134
4d97480b
MH
1135 recv_probe = ACCESS_ONCE(bond->recv_probe);
1136 if (recv_probe) {
de063b70
ED
1137 ret = recv_probe(skb, bond, slave);
1138 if (ret == RX_HANDLER_CONSUMED) {
1139 consume_skb(skb);
1140 return ret;
3aba891d
JP
1141 }
1142 }
1143
0bd80dad 1144 if (bond_should_deliver_exact_match(skb, slave, bond)) {
8a4eb573 1145 return RX_HANDLER_EXACT;
5b2c4dd2
JP
1146 }
1147
35d48903 1148 skb->dev = bond->dev;
5b2c4dd2 1149
01844098 1150 if (BOND_MODE(bond) == BOND_MODE_ALB &&
35d48903 1151 bond->dev->priv_flags & IFF_BRIDGE_PORT &&
5b2c4dd2 1152 skb->pkt_type == PACKET_HOST) {
5b2c4dd2 1153
541ac7c9
CG
1154 if (unlikely(skb_cow_head(skb,
1155 skb->data - skb_mac_header(skb)))) {
1156 kfree_skb(skb);
8a4eb573 1157 return RX_HANDLER_CONSUMED;
541ac7c9 1158 }
2a7c183b 1159 ether_addr_copy(eth_hdr(skb)->h_dest, bond->dev->dev_addr);
5b2c4dd2
JP
1160 }
1161
13a8e0c8 1162 return ret;
5b2c4dd2
JP
1163}
1164
471cb5a3 1165static int bond_master_upper_dev_link(struct net_device *bond_dev,
1f718f0f
VF
1166 struct net_device *slave_dev,
1167 struct slave *slave)
471cb5a3
JP
1168{
1169 int err;
1170
1f718f0f 1171 err = netdev_master_upper_dev_link_private(slave_dev, bond_dev, slave);
471cb5a3
JP
1172 if (err)
1173 return err;
1174 slave_dev->flags |= IFF_SLAVE;
7f294054 1175 rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL);
471cb5a3
JP
1176 return 0;
1177}
1178
1179static void bond_upper_dev_unlink(struct net_device *bond_dev,
1180 struct net_device *slave_dev)
1181{
1182 netdev_upper_dev_unlink(slave_dev, bond_dev);
1183 slave_dev->flags &= ~IFF_SLAVE;
7f294054 1184 rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE, GFP_KERNEL);
471cb5a3
JP
1185}
1186
3fdddd85 1187static struct slave *bond_alloc_slave(struct bonding *bond)
1188{
1189 struct slave *slave = NULL;
1190
1191 slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1192 if (!slave)
1193 return NULL;
1194
01844098 1195 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
3fdddd85 1196 SLAVE_AD_INFO(slave) = kzalloc(sizeof(struct ad_slave_info),
1197 GFP_KERNEL);
1198 if (!SLAVE_AD_INFO(slave)) {
1199 kfree(slave);
1200 return NULL;
1201 }
1202 }
1203 return slave;
1204}
1205
1206static void bond_free_slave(struct slave *slave)
1207{
1208 struct bonding *bond = bond_get_bond_by_slave(slave);
1209
01844098 1210 if (BOND_MODE(bond) == BOND_MODE_8023AD)
3fdddd85 1211 kfree(SLAVE_AD_INFO(slave));
1212
1213 kfree(slave);
1214}
1215
69a2338e
MS
1216static void bond_fill_ifbond(struct bonding *bond, struct ifbond *info)
1217{
1218 info->bond_mode = BOND_MODE(bond);
1219 info->miimon = bond->params.miimon;
1220 info->num_slaves = bond->slave_cnt;
1221}
1222
1223static void bond_fill_ifslave(struct slave *slave, struct ifslave *info)
1224{
1225 strcpy(info->slave_name, slave->dev->name);
1226 info->link = slave->link;
1227 info->state = bond_slave_state(slave);
1228 info->link_failure_count = slave->link_failure_count;
1229}
1230
92e584fe
MS
1231static void bond_netdev_notify(struct net_device *dev,
1232 struct netdev_bonding_info *info)
69e61133 1233{
69e61133 1234 rtnl_lock();
92e584fe 1235 netdev_bonding_info_change(dev, info);
69e61133
MS
1236 rtnl_unlock();
1237}
1238
1239static void bond_netdev_notify_work(struct work_struct *_work)
1240{
1241 struct netdev_notify_work *w =
1242 container_of(_work, struct netdev_notify_work, work.work);
1243
92e584fe 1244 bond_netdev_notify(w->dev, &w->bonding_info);
69e61133 1245 dev_put(w->dev);
92e584fe 1246 kfree(w);
69e61133
MS
1247}
1248
1249void bond_queue_slave_event(struct slave *slave)
1250{
92e584fe 1251 struct bonding *bond = slave->bond;
69e61133
MS
1252 struct netdev_notify_work *nnw = kzalloc(sizeof(*nnw), GFP_ATOMIC);
1253
1254 if (!nnw)
1255 return;
1256
92e584fe 1257 dev_hold(slave->dev);
69e61133 1258 nnw->dev = slave->dev;
92e584fe
MS
1259 bond_fill_ifslave(slave, &nnw->bonding_info.slave);
1260 bond_fill_ifbond(bond, &nnw->bonding_info.master);
1261 INIT_DELAYED_WORK(&nnw->work, bond_netdev_notify_work);
69e61133 1262
92e584fe 1263 queue_delayed_work(slave->bond->wq, &nnw->work, 0);
69e61133
MS
1264}
1265
1da177e4 1266/* enslave device <slave> to bond device <master> */
a77b5325 1267int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1268{
454d7c9b 1269 struct bonding *bond = netdev_priv(bond_dev);
eb7cc59a 1270 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
c8c23903 1271 struct slave *new_slave = NULL, *prev_slave;
1da177e4
LT
1272 struct sockaddr addr;
1273 int link_reporting;
8599b52e 1274 int res = 0, i;
1da177e4 1275
c772dde3
BH
1276 if (!bond->params.use_carrier &&
1277 slave_dev->ethtool_ops->get_link == NULL &&
1278 slave_ops->ndo_do_ioctl == NULL) {
76444f50
VF
1279 netdev_warn(bond_dev, "no link monitoring support for %s\n",
1280 slave_dev->name);
1da177e4
LT
1281 }
1282
1da177e4
LT
1283 /* already enslaved */
1284 if (slave_dev->flags & IFF_SLAVE) {
76444f50 1285 netdev_dbg(bond_dev, "Error: Device was already enslaved\n");
1da177e4
LT
1286 return -EBUSY;
1287 }
1288
09a89c21 1289 if (bond_dev == slave_dev) {
76444f50 1290 netdev_err(bond_dev, "cannot enslave bond to itself.\n");
09a89c21
JB
1291 return -EPERM;
1292 }
1293
1da177e4
LT
1294 /* vlan challenged mutual exclusion */
1295 /* no need to lock since we're protected by rtnl_lock */
1296 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
76444f50
VF
1297 netdev_dbg(bond_dev, "%s is NETIF_F_VLAN_CHALLENGED\n",
1298 slave_dev->name);
55462cf3 1299 if (vlan_uses_dev(bond_dev)) {
76444f50
VF
1300 netdev_err(bond_dev, "Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1301 slave_dev->name, bond_dev->name);
1da177e4
LT
1302 return -EPERM;
1303 } else {
76444f50
VF
1304 netdev_warn(bond_dev, "enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1305 slave_dev->name, slave_dev->name,
1306 bond_dev->name);
1da177e4
LT
1307 }
1308 } else {
76444f50
VF
1309 netdev_dbg(bond_dev, "%s is !NETIF_F_VLAN_CHALLENGED\n",
1310 slave_dev->name);
1da177e4
LT
1311 }
1312
547942ca 1313 /* Old ifenslave binaries are no longer supported. These can
3d632c3f 1314 * be identified with moderate accuracy by the state of the slave:
217df670
JV
1315 * the current ifenslave will set the interface down prior to
1316 * enslaving it; the old ifenslave will not.
1317 */
1318 if ((slave_dev->flags & IFF_UP)) {
76444f50
VF
1319 netdev_err(bond_dev, "%s is up - this may be due to an out of date ifenslave\n",
1320 slave_dev->name);
217df670
JV
1321 res = -EPERM;
1322 goto err_undo_flags;
1323 }
1da177e4 1324
872254dd
MS
1325 /* set bonding device ether type by slave - bonding netdevices are
1326 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1327 * there is a need to override some of the type dependent attribs/funcs.
1328 *
1329 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1330 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1331 */
0965a1f3 1332 if (!bond_has_slaves(bond)) {
e36b9d16 1333 if (bond_dev->type != slave_dev->type) {
76444f50
VF
1334 netdev_dbg(bond_dev, "change device type from %d to %d\n",
1335 bond_dev->type, slave_dev->type);
75c78500 1336
b7bc2a5b
AW
1337 res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE,
1338 bond_dev);
3ca5b404
JP
1339 res = notifier_to_errno(res);
1340 if (res) {
76444f50 1341 netdev_err(bond_dev, "refused to change device type\n");
3ca5b404
JP
1342 res = -EBUSY;
1343 goto err_undo_flags;
1344 }
75c78500 1345
32a806c1 1346 /* Flush unicast and multicast addresses */
a748ee24 1347 dev_uc_flush(bond_dev);
22bedad3 1348 dev_mc_flush(bond_dev);
32a806c1 1349
e36b9d16
MS
1350 if (slave_dev->type != ARPHRD_ETHER)
1351 bond_setup_by_slave(bond_dev, slave_dev);
550fd08c 1352 else {
e36b9d16 1353 ether_setup(bond_dev);
550fd08c
NH
1354 bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING;
1355 }
75c78500 1356
b7bc2a5b
AW
1357 call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE,
1358 bond_dev);
e36b9d16 1359 }
872254dd 1360 } else if (bond_dev->type != slave_dev->type) {
76444f50
VF
1361 netdev_err(bond_dev, "%s ether type (%d) is different from other slaves (%d), can not enslave it\n",
1362 slave_dev->name, slave_dev->type, bond_dev->type);
a4aee5c8
JP
1363 res = -EINVAL;
1364 goto err_undo_flags;
872254dd
MS
1365 }
1366
eb7cc59a 1367 if (slave_ops->ndo_set_mac_address == NULL) {
76444f50 1368 netdev_warn(bond_dev, "The slave device specified does not support setting the MAC address\n");
f5442441
VF
1369 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP &&
1370 bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
1371 if (!bond_has_slaves(bond)) {
00503b6f 1372 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
76444f50 1373 netdev_warn(bond_dev, "Setting fail_over_mac to active for active-backup mode\n");
f5442441 1374 } else {
76444f50 1375 netdev_err(bond_dev, "The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active\n");
f5442441
VF
1376 res = -EOPNOTSUPP;
1377 goto err_undo_flags;
00503b6f 1378 }
2ab82852 1379 }
1da177e4
LT
1380 }
1381
8d8fc29d
AW
1382 call_netdevice_notifiers(NETDEV_JOIN, slave_dev);
1383
c20811a7 1384 /* If this is the first slave, then we need to set the master's hardware
547942ca
NA
1385 * address to be the same as the slave's.
1386 */
0965a1f3 1387 if (!bond_has_slaves(bond) &&
dec1e90e 1388 bond->dev->addr_assign_type == NET_ADDR_RANDOM)
409cc1f8 1389 bond_set_dev_addr(bond->dev, slave_dev);
c20811a7 1390
3fdddd85 1391 new_slave = bond_alloc_slave(bond);
1da177e4
LT
1392 if (!new_slave) {
1393 res = -ENOMEM;
1394 goto err_undo_flags;
1395 }
3fdddd85 1396
dc73c41f
VF
1397 new_slave->bond = bond;
1398 new_slave->dev = slave_dev;
547942ca 1399 /* Set the new_slave's queue_id to be zero. Queue ID mapping
bb1d9123
AG
1400 * is set via sysfs or module option if desired.
1401 */
1402 new_slave->queue_id = 0;
1403
b15ba0fb
JP
1404 /* Save slave's original mtu and then set it to match the bond */
1405 new_slave->original_mtu = slave_dev->mtu;
1406 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1407 if (res) {
76444f50 1408 netdev_dbg(bond_dev, "Error %d calling dev_set_mtu\n", res);
b15ba0fb
JP
1409 goto err_free;
1410 }
1411
547942ca 1412 /* Save slave's original ("permanent") mac address for modes
217df670
JV
1413 * that need it, and for restoring it upon release, and then
1414 * set it to the master's address
1415 */
ada0f863 1416 ether_addr_copy(new_slave->perm_hwaddr, slave_dev->dev_addr);
1da177e4 1417
00503b6f 1418 if (!bond->params.fail_over_mac ||
01844098 1419 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
547942ca 1420 /* Set slave to master's mac address. The application already
2ab82852
MS
1421 * set the master's mac address to that of the first slave
1422 */
1423 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1424 addr.sa_family = slave_dev->type;
1425 res = dev_set_mac_address(slave_dev, &addr);
1426 if (res) {
76444f50 1427 netdev_dbg(bond_dev, "Error %d calling set_mac_address\n", res);
b15ba0fb 1428 goto err_restore_mtu;
2ab82852 1429 }
217df670 1430 }
1da177e4 1431
217df670
JV
1432 /* open the slave since the application closed it */
1433 res = dev_open(slave_dev);
1434 if (res) {
76444f50 1435 netdev_dbg(bond_dev, "Opening slave %s failed\n", slave_dev->name);
1f718f0f 1436 goto err_restore_mac;
1da177e4
LT
1437 }
1438
0b680e75 1439 slave_dev->priv_flags |= IFF_BONDING;
5f0c5f73
AG
1440 /* initialize slave stats */
1441 dev_get_stats(new_slave->dev, &new_slave->slave_stats);
1da177e4 1442
58402054 1443 if (bond_is_lb(bond)) {
1da177e4
LT
1444 /* bond_alb_init_slave() must be called before all other stages since
1445 * it might fail and we do not want to have to undo everything
1446 */
1447 res = bond_alb_init_slave(bond, new_slave);
3d632c3f 1448 if (res)
569f0c4d 1449 goto err_close;
1da177e4
LT
1450 }
1451
ec0865a9 1452 /* If the mode uses primary, then the following is handled by
303d1cbf 1453 * bond_change_active_slave().
1da177e4 1454 */
ec0865a9 1455 if (!bond_uses_primary(bond)) {
1da177e4
LT
1456 /* set promiscuity level to new slave */
1457 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC
1458 res = dev_set_promiscuity(slave_dev, 1);
1459 if (res)
1460 goto err_close;
1da177e4
LT
1461 }
1462
1463 /* set allmulti level to new slave */
1464 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC
1465 res = dev_set_allmulti(slave_dev, 1);
1466 if (res)
1467 goto err_close;
1da177e4
LT
1468 }
1469
b9e40857 1470 netif_addr_lock_bh(bond_dev);
303d1cbf
JV
1471
1472 dev_mc_sync_multiple(slave_dev, bond_dev);
1473 dev_uc_sync_multiple(slave_dev, bond_dev);
1474
b9e40857 1475 netif_addr_unlock_bh(bond_dev);
1da177e4
LT
1476 }
1477
01844098 1478 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1da177e4
LT
1479 /* add lacpdu mc addr to mc list */
1480 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1481
22bedad3 1482 dev_mc_add(slave_dev, lacpdu_multicast);
1da177e4
LT
1483 }
1484
b8e2fde4
WY
1485 res = vlan_vids_add_by_dev(slave_dev, bond_dev);
1486 if (res) {
76444f50
VF
1487 netdev_err(bond_dev, "Couldn't add bond vlan ids to %s\n",
1488 slave_dev->name);
1ff412ad 1489 goto err_close;
1490 }
1da177e4 1491
c8c23903 1492 prev_slave = bond_last_slave(bond);
1da177e4
LT
1493
1494 new_slave->delay = 0;
1495 new_slave->link_failure_count = 0;
1496
876254ae
VF
1497 bond_update_speed_duplex(new_slave);
1498
49f17de7 1499 new_slave->last_rx = jiffies -
f31c7937 1500 (msecs_to_jiffies(bond->params.arp_interval) + 1);
8599b52e 1501 for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
49f17de7 1502 new_slave->target_last_arp_rx[i] = new_slave->last_rx;
f5b2b966 1503
1da177e4
LT
1504 if (bond->params.miimon && !bond->params.use_carrier) {
1505 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1506
1507 if ((link_reporting == -1) && !bond->params.arp_interval) {
547942ca 1508 /* miimon is set but a bonded network driver
1da177e4
LT
1509 * does not support ETHTOOL/MII and
1510 * arp_interval is not set. Note: if
1511 * use_carrier is enabled, we will never go
1512 * here (because netif_carrier is always
1513 * supported); thus, we don't need to change
1514 * the messages for netif_carrier.
1515 */
76444f50
VF
1516 netdev_warn(bond_dev, "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",
1517 slave_dev->name);
1da177e4
LT
1518 } else if (link_reporting == -1) {
1519 /* unable get link status using mii/ethtool */
76444f50
VF
1520 netdev_warn(bond_dev, "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",
1521 slave_dev->name);
1da177e4
LT
1522 }
1523 }
1524
1525 /* check for initial state */
f31c7937
MK
1526 if (bond->params.miimon) {
1527 if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) {
1528 if (bond->params.updelay) {
69a2338e
MS
1529 bond_set_slave_link_state(new_slave,
1530 BOND_LINK_BACK);
f31c7937
MK
1531 new_slave->delay = bond->params.updelay;
1532 } else {
69a2338e
MS
1533 bond_set_slave_link_state(new_slave,
1534 BOND_LINK_UP);
f31c7937 1535 }
1da177e4 1536 } else {
69a2338e 1537 bond_set_slave_link_state(new_slave, BOND_LINK_DOWN);
1da177e4 1538 }
f31c7937 1539 } else if (bond->params.arp_interval) {
69a2338e
MS
1540 bond_set_slave_link_state(new_slave,
1541 (netif_carrier_ok(slave_dev) ?
1542 BOND_LINK_UP : BOND_LINK_DOWN));
1da177e4 1543 } else {
69a2338e 1544 bond_set_slave_link_state(new_slave, BOND_LINK_UP);
1da177e4
LT
1545 }
1546
f31c7937 1547 if (new_slave->link != BOND_LINK_DOWN)
8e603460 1548 new_slave->last_link_up = jiffies;
76444f50
VF
1549 netdev_dbg(bond_dev, "Initial state of slave_dev is BOND_LINK_%s\n",
1550 new_slave->link == BOND_LINK_DOWN ? "DOWN" :
1551 (new_slave->link == BOND_LINK_UP ? "UP" : "BACK"));
f31c7937 1552
ec0865a9 1553 if (bond_uses_primary(bond) && bond->params.primary[0]) {
1da177e4 1554 /* if there is a primary slave, remember it */
a549952a 1555 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
059b47e8 1556 rcu_assign_pointer(bond->primary_slave, new_slave);
a549952a
JP
1557 bond->force_primary = true;
1558 }
1da177e4
LT
1559 }
1560
01844098 1561 switch (BOND_MODE(bond)) {
1da177e4 1562 case BOND_MODE_ACTIVEBACKUP:
5e5b0665 1563 bond_set_slave_inactive_flags(new_slave,
1564 BOND_SLAVE_NOTIFY_NOW);
1da177e4
LT
1565 break;
1566 case BOND_MODE_8023AD:
1567 /* in 802.3ad mode, the internal mechanism
1568 * will activate the slaves in the selected
1569 * aggregator
1570 */
5e5b0665 1571 bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
1da177e4 1572 /* if this is the first slave */
23c147e0 1573 if (!prev_slave) {
3fdddd85 1574 SLAVE_AD_INFO(new_slave)->id = 1;
1da177e4
LT
1575 /* Initialize AD with the number of times that the AD timer is called in 1 second
1576 * can be called only after the mac address of the bond is set
1577 */
56d00c67 1578 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL);
1da177e4 1579 } else {
3fdddd85 1580 SLAVE_AD_INFO(new_slave)->id =
1581 SLAVE_AD_INFO(prev_slave)->id + 1;
1da177e4
LT
1582 }
1583
1584 bond_3ad_bind_slave(new_slave);
1585 break;
1586 case BOND_MODE_TLB:
1587 case BOND_MODE_ALB:
e30bc066 1588 bond_set_active_slave(new_slave);
5e5b0665 1589 bond_set_slave_inactive_flags(new_slave, BOND_SLAVE_NOTIFY_NOW);
1da177e4
LT
1590 break;
1591 default:
76444f50 1592 netdev_dbg(bond_dev, "This slave is always active in trunk mode\n");
1da177e4
LT
1593
1594 /* always active in trunk mode */
e30bc066 1595 bond_set_active_slave(new_slave);
1da177e4
LT
1596
1597 /* In trunking mode there is little meaning to curr_active_slave
1598 * anyway (it holds no special properties of the bond device),
1599 * so we can change it without calling change_active_interface()
1600 */
4740d638
ED
1601 if (!rcu_access_pointer(bond->curr_active_slave) &&
1602 new_slave->link == BOND_LINK_UP)
278b2083 1603 rcu_assign_pointer(bond->curr_active_slave, new_slave);
3d632c3f 1604
1da177e4
LT
1605 break;
1606 } /* switch(bond_mode) */
1607
f6dc31a8 1608#ifdef CONFIG_NET_POLL_CONTROLLER
10eccb46 1609 slave_dev->npinfo = bond->dev->npinfo;
8a8efa22
AW
1610 if (slave_dev->npinfo) {
1611 if (slave_enable_netpoll(new_slave)) {
76444f50 1612 netdev_info(bond_dev, "master_dev is using netpoll, but new slave device does not support netpoll\n");
8a8efa22 1613 res = -EBUSY;
f7d9821a 1614 goto err_detach;
8a8efa22 1615 }
f6dc31a8
WC
1616 }
1617#endif
8a8efa22 1618
fbe168ba
MK
1619 if (!(bond_dev->features & NETIF_F_LRO))
1620 dev_disable_lro(slave_dev);
1621
35d48903
JP
1622 res = netdev_rx_handler_register(slave_dev, bond_handle_frame,
1623 new_slave);
1624 if (res) {
76444f50 1625 netdev_dbg(bond_dev, "Error %d calling netdev_rx_handler_register\n", res);
5831d66e 1626 goto err_detach;
35d48903
JP
1627 }
1628
1f718f0f
VF
1629 res = bond_master_upper_dev_link(bond_dev, slave_dev, new_slave);
1630 if (res) {
76444f50 1631 netdev_dbg(bond_dev, "Error %d calling bond_master_upper_dev_link\n", res);
1f718f0f
VF
1632 goto err_unregister;
1633 }
1634
07699f9a 1635 res = bond_sysfs_slave_add(new_slave);
1636 if (res) {
76444f50 1637 netdev_dbg(bond_dev, "Error %d calling bond_sysfs_slave_add\n", res);
07699f9a 1638 goto err_upper_unlink;
1639 }
1640
5378c2e6
VF
1641 bond->slave_cnt++;
1642 bond_compute_features(bond);
1643 bond_set_carrier(bond);
1644
ec0865a9 1645 if (bond_uses_primary(bond)) {
f80889a5 1646 block_netpoll_tx();
5378c2e6 1647 bond_select_active_slave(bond);
f80889a5 1648 unblock_netpoll_tx();
5378c2e6 1649 }
1f718f0f 1650
ee637714
MB
1651 if (bond_mode_uses_xmit_hash(bond))
1652 bond_update_slave_arr(bond, NULL);
1653
76444f50
VF
1654 netdev_info(bond_dev, "Enslaving %s as %s interface with %s link\n",
1655 slave_dev->name,
1656 bond_is_active_slave(new_slave) ? "an active" : "a backup",
1657 new_slave->link != BOND_LINK_DOWN ? "an up" : "a down");
1da177e4
LT
1658
1659 /* enslave is successful */
69e61133 1660 bond_queue_slave_event(new_slave);
1da177e4
LT
1661 return 0;
1662
1663/* Undo stages on error */
07699f9a 1664err_upper_unlink:
1665 bond_upper_dev_unlink(bond_dev, slave_dev);
1666
1f718f0f
VF
1667err_unregister:
1668 netdev_rx_handler_unregister(slave_dev);
1669
f7d9821a 1670err_detach:
ec0865a9 1671 if (!bond_uses_primary(bond))
303d1cbf
JV
1672 bond_hw_addr_flush(bond_dev, slave_dev);
1673
1ff412ad 1674 vlan_vids_del_by_dev(slave_dev, bond_dev);
059b47e8
NA
1675 if (rcu_access_pointer(bond->primary_slave) == new_slave)
1676 RCU_INIT_POINTER(bond->primary_slave, NULL);
4740d638 1677 if (rcu_access_pointer(bond->curr_active_slave) == new_slave) {
f80889a5 1678 block_netpoll_tx();
c8517035 1679 bond_change_active_slave(bond, NULL);
3c5913b5 1680 bond_select_active_slave(bond);
f80889a5 1681 unblock_netpoll_tx();
3c5913b5 1682 }
059b47e8
NA
1683 /* either primary_slave or curr_active_slave might've changed */
1684 synchronize_rcu();
fc7a72ac 1685 slave_disable_netpoll(new_slave);
f7d9821a 1686
1da177e4 1687err_close:
b6a5a7b9 1688 slave_dev->priv_flags &= ~IFF_BONDING;
1da177e4
LT
1689 dev_close(slave_dev);
1690
1691err_restore_mac:
00503b6f 1692 if (!bond->params.fail_over_mac ||
01844098 1693 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
3915c1e8
JV
1694 /* XXX TODO - fom follow mode needs to change master's
1695 * MAC if this slave's MAC is in use by the bond, or at
1696 * least print a warning.
1697 */
ada0f863 1698 ether_addr_copy(addr.sa_data, new_slave->perm_hwaddr);
2ab82852
MS
1699 addr.sa_family = slave_dev->type;
1700 dev_set_mac_address(slave_dev, &addr);
1701 }
1da177e4 1702
b15ba0fb
JP
1703err_restore_mtu:
1704 dev_set_mtu(slave_dev, new_slave->original_mtu);
1705
1da177e4 1706err_free:
3fdddd85 1707 bond_free_slave(new_slave);
1da177e4
LT
1708
1709err_undo_flags:
b8fad459 1710 /* Enslave of first slave has failed and we need to fix master's mac */
0965a1f3 1711 if (!bond_has_slaves(bond) &&
844223ab 1712 ether_addr_equal_64bits(bond_dev->dev_addr, slave_dev->dev_addr))
b8fad459 1713 eth_hw_addr_random(bond_dev);
3d632c3f 1714
1da177e4
LT
1715 return res;
1716}
1717
547942ca 1718/* Try to release the slave device <slave> from the bond device <master>
1da177e4 1719 * It is legal to access curr_active_slave without a lock because all the function
8c0bc550 1720 * is RTNL-locked. If "all" is true it means that the function is being called
0896341a 1721 * while destroying a bond interface and all slaves are being released.
1da177e4
LT
1722 *
1723 * The rules for slave state should be:
1724 * for Active/Backup:
1725 * Active stays on all backups go down
1726 * for Bonded connections:
1727 * The first up interface should be left on and all others downed.
1728 */
0896341a 1729static int __bond_release_one(struct net_device *bond_dev,
1730 struct net_device *slave_dev,
1731 bool all)
1da177e4 1732{
454d7c9b 1733 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
1734 struct slave *slave, *oldcurrent;
1735 struct sockaddr addr;
5a0068de 1736 int old_flags = bond_dev->flags;
c8f44aff 1737 netdev_features_t old_features = bond_dev->features;
1da177e4
LT
1738
1739 /* slave is not a slave or master is not master of this slave */
1740 if (!(slave_dev->flags & IFF_SLAVE) ||
471cb5a3 1741 !netdev_has_upper_dev(slave_dev, bond_dev)) {
a22a9e41 1742 netdev_dbg(bond_dev, "cannot release %s\n",
76444f50 1743 slave_dev->name);
1da177e4
LT
1744 return -EINVAL;
1745 }
1746
e843fa50 1747 block_netpoll_tx();
1da177e4
LT
1748
1749 slave = bond_get_slave_by_dev(bond, slave_dev);
1750 if (!slave) {
1751 /* not a slave of this bond */
76444f50
VF
1752 netdev_info(bond_dev, "%s not enslaved\n",
1753 slave_dev->name);
e843fa50 1754 unblock_netpoll_tx();
1da177e4
LT
1755 return -EINVAL;
1756 }
1757
07699f9a 1758 bond_sysfs_slave_del(slave);
1759
5f0c5f73
AG
1760 /* recompute stats just before removing the slave */
1761 bond_get_stats(bond->dev, &bond->bond_stats);
1762
1f718f0f 1763 bond_upper_dev_unlink(bond_dev, slave_dev);
35d48903
JP
1764 /* unregister rx_handler early so bond_handle_frame wouldn't be called
1765 * for this slave anymore.
1766 */
1767 netdev_rx_handler_unregister(slave_dev);
35d48903 1768
e470259f 1769 if (BOND_MODE(bond) == BOND_MODE_8023AD)
1da177e4 1770 bond_3ad_unbind_slave(slave);
1da177e4 1771
ee637714
MB
1772 if (bond_mode_uses_xmit_hash(bond))
1773 bond_update_slave_arr(bond, slave);
1774
76444f50
VF
1775 netdev_info(bond_dev, "Releasing %s interface %s\n",
1776 bond_is_active_slave(slave) ? "active" : "backup",
1777 slave_dev->name);
1da177e4 1778
4740d638 1779 oldcurrent = rcu_access_pointer(bond->curr_active_slave);
1da177e4 1780
85741718 1781 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
1da177e4 1782
00503b6f 1783 if (!all && (!bond->params.fail_over_mac ||
01844098 1784 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP)) {
844223ab 1785 if (ether_addr_equal_64bits(bond_dev->dev_addr, slave->perm_hwaddr) &&
0965a1f3 1786 bond_has_slaves(bond))
76444f50
VF
1787 netdev_warn(bond_dev, "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",
1788 slave_dev->name, slave->perm_hwaddr,
1789 bond_dev->name, slave_dev->name);
dec1e90e 1790 }
1791
059b47e8
NA
1792 if (rtnl_dereference(bond->primary_slave) == slave)
1793 RCU_INIT_POINTER(bond->primary_slave, NULL);
1da177e4 1794
1c72cfdc 1795 if (oldcurrent == slave)
1da177e4 1796 bond_change_active_slave(bond, NULL);
1da177e4 1797
58402054 1798 if (bond_is_lb(bond)) {
1da177e4
LT
1799 /* Must be called only after the slave has been
1800 * detached from the list and the curr_active_slave
1801 * has been cleared (if our_slave == old_current),
1802 * but before a new active slave is selected.
1803 */
1804 bond_alb_deinit_slave(bond, slave);
1805 }
1806
0896341a 1807 if (all) {
36708b89 1808 RCU_INIT_POINTER(bond->curr_active_slave, NULL);
0896341a 1809 } else if (oldcurrent == slave) {
547942ca 1810 /* Note that we hold RTNL over this sequence, so there
059fe7a5
JV
1811 * is no concern that another slave add/remove event
1812 * will interfere.
1813 */
1da177e4 1814 bond_select_active_slave(bond);
059fe7a5
JV
1815 }
1816
0965a1f3 1817 if (!bond_has_slaves(bond)) {
ff59c456 1818 bond_set_carrier(bond);
409cc1f8 1819 eth_hw_addr_random(bond_dev);
1da177e4
LT
1820 }
1821
e843fa50 1822 unblock_netpoll_tx();
278b2083 1823 synchronize_rcu();
ee6154e1 1824 bond->slave_cnt--;
1da177e4 1825
0965a1f3 1826 if (!bond_has_slaves(bond)) {
2af73d4b 1827 call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev);
80028ea1
VF
1828 call_netdevice_notifiers(NETDEV_RELEASE, bond->dev);
1829 }
2af73d4b 1830
b2a103e6
MM
1831 bond_compute_features(bond);
1832 if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1833 (old_features & NETIF_F_VLAN_CHALLENGED))
76444f50
VF
1834 netdev_info(bond_dev, "last VLAN challenged slave %s left bond %s - VLAN blocking is removed\n",
1835 slave_dev->name, bond_dev->name);
b2a103e6 1836
1ff412ad 1837 vlan_vids_del_by_dev(slave_dev, bond_dev);
1da177e4 1838
547942ca 1839 /* If the mode uses primary, then this case was handled above by
303d1cbf 1840 * bond_change_active_slave(..., NULL)
1da177e4 1841 */
ec0865a9 1842 if (!bond_uses_primary(bond)) {
5a0068de
NH
1843 /* unset promiscuity level from slave
1844 * NOTE: The NETDEV_CHANGEADDR call above may change the value
1845 * of the IFF_PROMISC flag in the bond_dev, but we need the
1846 * value of that flag before that change, as that was the value
1847 * when this slave was attached, so we cache at the start of the
1848 * function and use it here. Same goes for ALLMULTI below
1849 */
1850 if (old_flags & IFF_PROMISC)
1da177e4 1851 dev_set_promiscuity(slave_dev, -1);
1da177e4
LT
1852
1853 /* unset allmulti level from slave */
5a0068de 1854 if (old_flags & IFF_ALLMULTI)
1da177e4 1855 dev_set_allmulti(slave_dev, -1);
1da177e4 1856
303d1cbf 1857 bond_hw_addr_flush(bond_dev, slave_dev);
1da177e4
LT
1858 }
1859
8a8efa22 1860 slave_disable_netpoll(slave);
f6dc31a8 1861
1da177e4
LT
1862 /* close slave before restoring its mac address */
1863 dev_close(slave_dev);
1864
00503b6f 1865 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE ||
01844098 1866 BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
2ab82852 1867 /* restore original ("permanent") mac address */
ada0f863 1868 ether_addr_copy(addr.sa_data, slave->perm_hwaddr);
2ab82852
MS
1869 addr.sa_family = slave_dev->type;
1870 dev_set_mac_address(slave_dev, &addr);
1871 }
1da177e4 1872
b15ba0fb
JP
1873 dev_set_mtu(slave_dev, slave->original_mtu);
1874
2d7011ca 1875 slave_dev->priv_flags &= ~IFF_BONDING;
1da177e4 1876
3fdddd85 1877 bond_free_slave(slave);
1da177e4 1878
547942ca 1879 return 0;
1da177e4
LT
1880}
1881
0896341a 1882/* A wrapper used because of ndo_del_link */
1883int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1884{
1885 return __bond_release_one(bond_dev, slave_dev, false);
1886}
1887
547942ca
NA
1888/* First release a slave and then destroy the bond if no more slaves are left.
1889 * Must be under rtnl_lock when this function is called.
1890 */
26d8ee75 1891static int bond_release_and_destroy(struct net_device *bond_dev,
1892 struct net_device *slave_dev)
d90a162a 1893{
454d7c9b 1894 struct bonding *bond = netdev_priv(bond_dev);
d90a162a
MS
1895 int ret;
1896
1897 ret = bond_release(bond_dev, slave_dev);
0965a1f3 1898 if (ret == 0 && !bond_has_slaves(bond)) {
8a8efa22 1899 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
76444f50
VF
1900 netdev_info(bond_dev, "Destroying bond %s\n",
1901 bond_dev->name);
9e71626c 1902 unregister_netdevice(bond_dev);
d90a162a
MS
1903 }
1904 return ret;
1905}
1906
1da177e4
LT
1907static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
1908{
454d7c9b 1909 struct bonding *bond = netdev_priv(bond_dev);
69a2338e 1910 bond_fill_ifbond(bond, info);
1da177e4
LT
1911 return 0;
1912}
1913
1914static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
1915{
454d7c9b 1916 struct bonding *bond = netdev_priv(bond_dev);
9caff1e7 1917 struct list_head *iter;
dec1e90e 1918 int i = 0, res = -ENODEV;
1da177e4 1919 struct slave *slave;
1da177e4 1920
9caff1e7 1921 bond_for_each_slave(bond, slave, iter) {
dec1e90e 1922 if (i++ == (int)info->slave_id) {
689c96cc 1923 res = 0;
69a2338e 1924 bond_fill_ifslave(slave, info);
1da177e4
LT
1925 break;
1926 }
1927 }
1da177e4 1928
689c96cc 1929 return res;
1da177e4
LT
1930}
1931
1932/*-------------------------------- Monitoring -------------------------------*/
1933
4740d638 1934/* called with rcu_read_lock() */
f0c76d61
JV
1935static int bond_miimon_inspect(struct bonding *bond)
1936{
dec1e90e 1937 int link_state, commit = 0;
9caff1e7 1938 struct list_head *iter;
f0c76d61 1939 struct slave *slave;
41f89100
JP
1940 bool ignore_updelay;
1941
4740d638 1942 ignore_updelay = !rcu_dereference(bond->curr_active_slave);
1da177e4 1943
4cb4f97b 1944 bond_for_each_slave_rcu(bond, slave, iter) {
f0c76d61 1945 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 1946
f0c76d61 1947 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT
1948
1949 switch (slave->link) {
f0c76d61
JV
1950 case BOND_LINK_UP:
1951 if (link_state)
1952 continue;
1da177e4 1953
69a2338e 1954 bond_set_slave_link_state(slave, BOND_LINK_FAIL);
f0c76d61
JV
1955 slave->delay = bond->params.downdelay;
1956 if (slave->delay) {
76444f50
VF
1957 netdev_info(bond->dev, "link status down for %sinterface %s, disabling it in %d ms\n",
1958 (BOND_MODE(bond) ==
1959 BOND_MODE_ACTIVEBACKUP) ?
1960 (bond_is_active_slave(slave) ?
1961 "active " : "backup ") : "",
1962 slave->dev->name,
1963 bond->params.downdelay * bond->params.miimon);
1da177e4 1964 }
f0c76d61
JV
1965 /*FALLTHRU*/
1966 case BOND_LINK_FAIL:
1967 if (link_state) {
547942ca 1968 /* recovered before downdelay expired */
69a2338e 1969 bond_set_slave_link_state(slave, BOND_LINK_UP);
8e603460 1970 slave->last_link_up = jiffies;
76444f50
VF
1971 netdev_info(bond->dev, "link status up again after %d ms for interface %s\n",
1972 (bond->params.downdelay - slave->delay) *
1973 bond->params.miimon,
1974 slave->dev->name);
f0c76d61 1975 continue;
1da177e4 1976 }
f0c76d61
JV
1977
1978 if (slave->delay <= 0) {
1979 slave->new_link = BOND_LINK_DOWN;
1980 commit++;
1981 continue;
1da177e4 1982 }
1da177e4 1983
f0c76d61
JV
1984 slave->delay--;
1985 break;
1986
1987 case BOND_LINK_DOWN:
1988 if (!link_state)
1989 continue;
1990
69a2338e 1991 bond_set_slave_link_state(slave, BOND_LINK_BACK);
f0c76d61
JV
1992 slave->delay = bond->params.updelay;
1993
1994 if (slave->delay) {
76444f50
VF
1995 netdev_info(bond->dev, "link status up for interface %s, enabling it in %d ms\n",
1996 slave->dev->name,
1997 ignore_updelay ? 0 :
1998 bond->params.updelay *
1999 bond->params.miimon);
f0c76d61
JV
2000 }
2001 /*FALLTHRU*/
2002 case BOND_LINK_BACK:
2003 if (!link_state) {
69a2338e
MS
2004 bond_set_slave_link_state(slave,
2005 BOND_LINK_DOWN);
76444f50
VF
2006 netdev_info(bond->dev, "link status down again after %d ms for interface %s\n",
2007 (bond->params.updelay - slave->delay) *
2008 bond->params.miimon,
2009 slave->dev->name);
f0c76d61
JV
2010
2011 continue;
2012 }
2013
41f89100
JP
2014 if (ignore_updelay)
2015 slave->delay = 0;
2016
f0c76d61
JV
2017 if (slave->delay <= 0) {
2018 slave->new_link = BOND_LINK_UP;
2019 commit++;
41f89100 2020 ignore_updelay = false;
f0c76d61 2021 continue;
1da177e4 2022 }
f0c76d61
JV
2023
2024 slave->delay--;
1da177e4 2025 break;
f0c76d61
JV
2026 }
2027 }
1da177e4 2028
f0c76d61
JV
2029 return commit;
2030}
1da177e4 2031
f0c76d61
JV
2032static void bond_miimon_commit(struct bonding *bond)
2033{
9caff1e7 2034 struct list_head *iter;
059b47e8 2035 struct slave *slave, *primary;
f0c76d61 2036
9caff1e7 2037 bond_for_each_slave(bond, slave, iter) {
f0c76d61
JV
2038 switch (slave->new_link) {
2039 case BOND_LINK_NOCHANGE:
2040 continue;
1da177e4 2041
f0c76d61 2042 case BOND_LINK_UP:
69a2338e 2043 bond_set_slave_link_state(slave, BOND_LINK_UP);
8e603460 2044 slave->last_link_up = jiffies;
f0c76d61 2045
059b47e8 2046 primary = rtnl_dereference(bond->primary_slave);
01844098 2047 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
f0c76d61 2048 /* prevent it from being the active one */
e30bc066 2049 bond_set_backup_slave(slave);
01844098 2050 } else if (BOND_MODE(bond) != BOND_MODE_ACTIVEBACKUP) {
f0c76d61 2051 /* make it immediately active */
e30bc066 2052 bond_set_active_slave(slave);
059b47e8 2053 } else if (slave != primary) {
f0c76d61 2054 /* prevent it from being the active one */
e30bc066 2055 bond_set_backup_slave(slave);
1da177e4 2056 }
1da177e4 2057
76444f50
VF
2058 netdev_info(bond->dev, "link status definitely up for interface %s, %u Mbps %s duplex\n",
2059 slave->dev->name,
2060 slave->speed == SPEED_UNKNOWN ? 0 : slave->speed,
2061 slave->duplex ? "full" : "half");
1da177e4 2062
f0c76d61 2063 /* notify ad that the link status has changed */
01844098 2064 if (BOND_MODE(bond) == BOND_MODE_8023AD)
f0c76d61 2065 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2066
58402054 2067 if (bond_is_lb(bond))
f0c76d61
JV
2068 bond_alb_handle_link_change(bond, slave,
2069 BOND_LINK_UP);
1da177e4 2070
ee637714
MB
2071 if (BOND_MODE(bond) == BOND_MODE_XOR)
2072 bond_update_slave_arr(bond, NULL);
2073
059b47e8 2074 if (!bond->curr_active_slave || slave == primary)
f0c76d61 2075 goto do_failover;
1da177e4 2076
f0c76d61 2077 continue;
059fe7a5 2078
f0c76d61 2079 case BOND_LINK_DOWN:
fba4acda
JV
2080 if (slave->link_failure_count < UINT_MAX)
2081 slave->link_failure_count++;
2082
69a2338e 2083 bond_set_slave_link_state(slave, BOND_LINK_DOWN);
1da177e4 2084
01844098
VF
2085 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP ||
2086 BOND_MODE(bond) == BOND_MODE_8023AD)
5e5b0665 2087 bond_set_slave_inactive_flags(slave,
2088 BOND_SLAVE_NOTIFY_NOW);
f0c76d61 2089
76444f50
VF
2090 netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
2091 slave->dev->name);
f0c76d61 2092
01844098 2093 if (BOND_MODE(bond) == BOND_MODE_8023AD)
f0c76d61
JV
2094 bond_3ad_handle_link_change(slave,
2095 BOND_LINK_DOWN);
2096
ae63e808 2097 if (bond_is_lb(bond))
f0c76d61
JV
2098 bond_alb_handle_link_change(bond, slave,
2099 BOND_LINK_DOWN);
2100
ee637714
MB
2101 if (BOND_MODE(bond) == BOND_MODE_XOR)
2102 bond_update_slave_arr(bond, NULL);
2103
4740d638 2104 if (slave == rcu_access_pointer(bond->curr_active_slave))
f0c76d61
JV
2105 goto do_failover;
2106
2107 continue;
2108
2109 default:
76444f50
VF
2110 netdev_err(bond->dev, "invalid new link %d on slave %s\n",
2111 slave->new_link, slave->dev->name);
f0c76d61
JV
2112 slave->new_link = BOND_LINK_NOCHANGE;
2113
2114 continue;
2115 }
2116
2117do_failover:
e843fa50 2118 block_netpoll_tx();
f0c76d61 2119 bond_select_active_slave(bond);
e843fa50 2120 unblock_netpoll_tx();
f0c76d61
JV
2121 }
2122
2123 bond_set_carrier(bond);
1da177e4
LT
2124}
2125
547942ca 2126/* bond_mii_monitor
0b0eef66
JV
2127 *
2128 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV
2129 * inspection, then (if inspection indicates something needs to be done)
2130 * an acquisition of appropriate locks followed by a commit phase to
2131 * implement whatever link state changes are indicated.
0b0eef66 2132 */
6da67d26 2133static void bond_mii_monitor(struct work_struct *work)
0b0eef66
JV
2134{
2135 struct bonding *bond = container_of(work, struct bonding,
2136 mii_work.work);
ad246c99 2137 bool should_notify_peers = false;
1f2cd845 2138 unsigned long delay;
0b0eef66 2139
1f2cd845
DM
2140 delay = msecs_to_jiffies(bond->params.miimon);
2141
2142 if (!bond_has_slaves(bond))
f0c76d61 2143 goto re_arm;
b59f9f74 2144
4cb4f97b 2145 rcu_read_lock();
2146
ad246c99
BH
2147 should_notify_peers = bond_should_notify_peers(bond);
2148
1f2cd845 2149 if (bond_miimon_inspect(bond)) {
4cb4f97b 2150 rcu_read_unlock();
f0c76d61 2151
1f2cd845
DM
2152 /* Race avoidance with bond_close cancel of workqueue */
2153 if (!rtnl_trylock()) {
1f2cd845
DM
2154 delay = 1;
2155 should_notify_peers = false;
2156 goto re_arm;
2157 }
6b6c5261 2158
1f2cd845
DM
2159 bond_miimon_commit(bond);
2160
1f2cd845 2161 rtnl_unlock(); /* might sleep, hold no other locks */
4cb4f97b 2162 } else
2163 rcu_read_unlock();
0b0eef66 2164
f0c76d61 2165re_arm:
e6d265e8 2166 if (bond->params.miimon)
1f2cd845
DM
2167 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2168
1f2cd845
DM
2169 if (should_notify_peers) {
2170 if (!rtnl_trylock())
2171 return;
2172 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev);
2173 rtnl_unlock();
2174 }
0b0eef66 2175}
c3ade5ca 2176
50223ce4 2177static bool bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2178{
50223ce4
VF
2179 struct net_device *upper;
2180 struct list_head *iter;
2181 bool ret = false;
f5b2b966 2182
eaddcd76 2183 if (ip == bond_confirm_addr(bond->dev, 0, ip))
50223ce4 2184 return true;
f5b2b966 2185
50223ce4 2186 rcu_read_lock();
2f268f12 2187 netdev_for_each_all_upper_dev_rcu(bond->dev, upper, iter) {
50223ce4
VF
2188 if (ip == bond_confirm_addr(upper, 0, ip)) {
2189 ret = true;
2190 break;
2191 }
f5b2b966 2192 }
50223ce4 2193 rcu_read_unlock();
f5b2b966 2194
50223ce4 2195 return ret;
f5b2b966
JV
2196}
2197
547942ca 2198/* We go to the (large) trouble of VLAN tagging ARP frames because
c3ade5ca
JV
2199 * switches in VLAN mode (especially if ports are configured as
2200 * "native" to a VLAN) might not pass non-tagged frames.
2201 */
fbd929f2 2202static void bond_arp_send(struct net_device *slave_dev, int arp_op,
2203 __be32 dest_ip, __be32 src_ip,
44a40855 2204 struct bond_vlan_tag *tags)
c3ade5ca
JV
2205{
2206 struct sk_buff *skb;
3e403a77 2207 struct bond_vlan_tag *outer_tag = tags;
c3ade5ca 2208
76444f50
VF
2209 netdev_dbg(slave_dev, "arp %d on slave %s: dst %pI4 src %pI4\n",
2210 arp_op, slave_dev->name, &dest_ip, &src_ip);
3d632c3f 2211
c3ade5ca
JV
2212 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2213 NULL, slave_dev->dev_addr, NULL);
2214
2215 if (!skb) {
4873ac3c 2216 net_err_ratelimited("ARP packet allocation failed\n");
c3ade5ca
JV
2217 return;
2218 }
fbd929f2 2219
3e403a77
VF
2220 if (!tags || tags->vlan_proto == VLAN_N_VID)
2221 goto xmit;
2222
2223 tags++;
2224
44a40855 2225 /* Go through all the tags backwards and add them to the packet */
3e403a77
VF
2226 while (tags->vlan_proto != VLAN_N_VID) {
2227 if (!tags->vlan_id) {
2228 tags++;
44a40855 2229 continue;
3e403a77 2230 }
44a40855 2231
76444f50 2232 netdev_dbg(slave_dev, "inner tag: proto %X vid %X\n",
3e403a77 2233 ntohs(outer_tag->vlan_proto), tags->vlan_id);
62749e2c
JP
2234 skb = vlan_insert_tag_set_proto(skb, tags->vlan_proto,
2235 tags->vlan_id);
44a40855
VY
2236 if (!skb) {
2237 net_err_ratelimited("failed to insert inner VLAN tag\n");
2238 return;
2239 }
3e403a77
VF
2240
2241 tags++;
44a40855
VY
2242 }
2243 /* Set the outer tag */
3e403a77 2244 if (outer_tag->vlan_id) {
76444f50 2245 netdev_dbg(slave_dev, "outer tag: proto %X vid %X\n",
3e403a77 2246 ntohs(outer_tag->vlan_proto), outer_tag->vlan_id);
b4bef1b5
JP
2247 __vlan_hwaccel_put_tag(skb, outer_tag->vlan_proto,
2248 outer_tag->vlan_id);
c3ade5ca 2249 }
3e403a77
VF
2250
2251xmit:
c3ade5ca
JV
2252 arp_xmit(skb);
2253}
2254
44a40855
VY
2255/* Validate the device path between the @start_dev and the @end_dev.
2256 * The path is valid if the @end_dev is reachable through device
2257 * stacking.
2258 * When the path is validated, collect any vlan information in the
2259 * path.
2260 */
3e403a77
VF
2261struct bond_vlan_tag *bond_verify_device_path(struct net_device *start_dev,
2262 struct net_device *end_dev,
2263 int level)
44a40855 2264{
3e403a77 2265 struct bond_vlan_tag *tags;
44a40855
VY
2266 struct net_device *upper;
2267 struct list_head *iter;
44a40855 2268
3e403a77
VF
2269 if (start_dev == end_dev) {
2270 tags = kzalloc(sizeof(*tags) * (level + 1), GFP_ATOMIC);
2271 if (!tags)
2272 return ERR_PTR(-ENOMEM);
2273 tags[level].vlan_proto = VLAN_N_VID;
2274 return tags;
2275 }
44a40855
VY
2276
2277 netdev_for_each_upper_dev_rcu(start_dev, upper, iter) {
3e403a77
VF
2278 tags = bond_verify_device_path(upper, end_dev, level + 1);
2279 if (IS_ERR_OR_NULL(tags)) {
2280 if (IS_ERR(tags))
2281 return tags;
2282 continue;
44a40855 2283 }
3e403a77
VF
2284 if (is_vlan_dev(upper)) {
2285 tags[level].vlan_proto = vlan_dev_vlan_proto(upper);
2286 tags[level].vlan_id = vlan_dev_vlan_id(upper);
2287 }
2288
2289 return tags;
44a40855
VY
2290 }
2291
3e403a77 2292 return NULL;
44a40855 2293}
c3ade5ca 2294
1da177e4
LT
2295static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2296{
c3ade5ca 2297 struct rtable *rt;
3e403a77 2298 struct bond_vlan_tag *tags;
27bc11e6 2299 __be32 *targets = bond->params.arp_targets, addr;
fbd929f2 2300 int i;
1da177e4 2301
27bc11e6 2302 for (i = 0; i < BOND_MAX_ARP_TARGETS && targets[i]; i++) {
76444f50 2303 netdev_dbg(bond->dev, "basa: target %pI4\n", &targets[i]);
3e403a77 2304 tags = NULL;
c3ade5ca 2305
27bc11e6 2306 /* Find out through which dev should the packet go */
78fbfd8a
DM
2307 rt = ip_route_output(dev_net(bond->dev), targets[i], 0,
2308 RTO_ONLINK, 0);
b23dd4fe 2309 if (IS_ERR(rt)) {
28572760
VF
2310 /* there's no route to target - try to send arp
2311 * probe to generate any traffic (arp_validate=0)
2312 */
4873ac3c 2313 if (bond->params.arp_validate)
2314 net_warn_ratelimited("%s: no route to arp_ip_target %pI4 and arp_validate is set\n",
2315 bond->dev->name,
2316 &targets[i]);
44a40855
VY
2317 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2318 0, tags);
c3ade5ca
JV
2319 continue;
2320 }
2321
27bc11e6
VF
2322 /* bond device itself */
2323 if (rt->dst.dev == bond->dev)
2324 goto found;
2325
2326 rcu_read_lock();
3e403a77 2327 tags = bond_verify_device_path(bond->dev, rt->dst.dev, 0);
27bc11e6 2328 rcu_read_unlock();
c3ade5ca 2329
3e403a77 2330 if (!IS_ERR_OR_NULL(tags))
44a40855
VY
2331 goto found;
2332
27bc11e6 2333 /* Not our device - skip */
76444f50
VF
2334 netdev_dbg(bond->dev, "no path to arp_ip_target %pI4 via rt.dev %s\n",
2335 &targets[i], rt->dst.dev ? rt->dst.dev->name : "NULL");
3e32582f 2336
ed4b9f80 2337 ip_rt_put(rt);
27bc11e6
VF
2338 continue;
2339
2340found:
2341 addr = bond_confirm_addr(rt->dst.dev, targets[i], 0);
2342 ip_rt_put(rt);
2343 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
44a40855 2344 addr, tags);
a67eed57 2345 kfree(tags);
c3ade5ca
JV
2346 }
2347}
2348
d3bb52b0 2349static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966 2350{
8599b52e
VF
2351 int i;
2352
87a7b84b 2353 if (!sip || !bond_has_this_ip(bond, tip)) {
76444f50
VF
2354 netdev_dbg(bond->dev, "bva: sip %pI4 tip %pI4 not found\n",
2355 &sip, &tip);
87a7b84b
VF
2356 return;
2357 }
f5b2b966 2358
8599b52e
VF
2359 i = bond_get_targets_ip(bond->params.arp_targets, sip);
2360 if (i == -1) {
76444f50
VF
2361 netdev_dbg(bond->dev, "bva: sip %pI4 not found in targets\n",
2362 &sip);
87a7b84b 2363 return;
f5b2b966 2364 }
49f17de7 2365 slave->last_rx = jiffies;
8599b52e 2366 slave->target_last_arp_rx[i] = jiffies;
f5b2b966
JV
2367}
2368
5bb9e0b5 2369int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond,
2370 struct slave *slave)
f5b2b966 2371{
de063b70 2372 struct arphdr *arp = (struct arphdr *)skb->data;
010d3c39 2373 struct slave *curr_active_slave;
f5b2b966 2374 unsigned char *arp_ptr;
d3bb52b0 2375 __be32 sip, tip;
f2cb691a 2376 int alen, is_arp = skb->protocol == __cpu_to_be16(ETH_P_ARP);
f5b2b966 2377
f2cb691a 2378 if (!slave_do_arp_validate(bond, slave)) {
bedabf90 2379 if ((slave_do_arp_validate_only(bond) && is_arp) ||
2380 !slave_do_arp_validate_only(bond))
49f17de7 2381 slave->last_rx = jiffies;
13a8e0c8 2382 return RX_HANDLER_ANOTHER;
f2cb691a
VF
2383 } else if (!is_arp) {
2384 return RX_HANDLER_ANOTHER;
2385 }
2c146102 2386
de063b70 2387 alen = arp_hdr_len(bond->dev);
f5b2b966 2388
76444f50
VF
2389 netdev_dbg(bond->dev, "bond_arp_rcv: skb->dev %s\n",
2390 skb->dev->name);
f5b2b966 2391
de063b70
ED
2392 if (alen > skb_headlen(skb)) {
2393 arp = kmalloc(alen, GFP_ATOMIC);
2394 if (!arp)
2395 goto out_unlock;
2396 if (skb_copy_bits(skb, 0, arp, alen) < 0)
2397 goto out_unlock;
2398 }
f5b2b966 2399
3aba891d 2400 if (arp->ar_hln != bond->dev->addr_len ||
f5b2b966
JV
2401 skb->pkt_type == PACKET_OTHERHOST ||
2402 skb->pkt_type == PACKET_LOOPBACK ||
2403 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2404 arp->ar_pro != htons(ETH_P_IP) ||
2405 arp->ar_pln != 4)
2406 goto out_unlock;
2407
2408 arp_ptr = (unsigned char *)(arp + 1);
3aba891d 2409 arp_ptr += bond->dev->addr_len;
f5b2b966 2410 memcpy(&sip, arp_ptr, 4);
3aba891d 2411 arp_ptr += 4 + bond->dev->addr_len;
f5b2b966
JV
2412 memcpy(&tip, arp_ptr, 4);
2413
76444f50
VF
2414 netdev_dbg(bond->dev, "bond_arp_rcv: %s/%d av %d sv %d sip %pI4 tip %pI4\n",
2415 slave->dev->name, bond_slave_state(slave),
2416 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2417 &sip, &tip);
f5b2b966 2418
010d3c39
VF
2419 curr_active_slave = rcu_dereference(bond->curr_active_slave);
2420
547942ca 2421 /* Backup slaves won't see the ARP reply, but do come through
f5b2b966
JV
2422 * here for each ARP probe (so we swap the sip/tip to validate
2423 * the probe). In a "redundant switch, common router" type of
2424 * configuration, the ARP probe will (hopefully) travel from
2425 * the active, through one switch, the router, then the other
2426 * switch before reaching the backup.
aeea64ac
VF
2427 *
2428 * We 'trust' the arp requests if there is an active slave and
2429 * it received valid arp reply(s) after it became active. This
2430 * is done to avoid endless looping when we can't reach the
2431 * arp_ip_target and fool ourselves with our own arp requests.
f5b2b966 2432 */
010d3c39 2433
e30bc066 2434 if (bond_is_active_slave(slave))
f5b2b966 2435 bond_validate_arp(bond, slave, sip, tip);
010d3c39
VF
2436 else if (curr_active_slave &&
2437 time_after(slave_last_rx(bond, curr_active_slave),
2438 curr_active_slave->last_link_up))
f5b2b966
JV
2439 bond_validate_arp(bond, slave, tip, sip);
2440
2441out_unlock:
de063b70
ED
2442 if (arp != (struct arphdr *)skb->data)
2443 kfree(arp);
13a8e0c8 2444 return RX_HANDLER_ANOTHER;
f5b2b966
JV
2445}
2446
e7f63f1d
VF
2447/* function to verify if we're in the arp_interval timeslice, returns true if
2448 * (last_act - arp_interval) <= jiffies <= (last_act + mod * arp_interval +
2449 * arp_interval/2) . the arp_interval/2 is needed for really fast networks.
2450 */
2451static bool bond_time_in_interval(struct bonding *bond, unsigned long last_act,
2452 int mod)
2453{
2454 int delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2455
2456 return time_in_range(jiffies,
2457 last_act - delta_in_ticks,
2458 last_act + mod * delta_in_ticks + delta_in_ticks/2);
2459}
2460
547942ca 2461/* This function is called regularly to monitor each slave's link
1da177e4
LT
2462 * ensuring that traffic is being sent and received when arp monitoring
2463 * is used in load-balancing mode. if the adapter has been dormant, then an
2464 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2465 * arp monitoring in active backup mode.
2466 */
6da67d26 2467static void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2468{
1b76b316
JV
2469 struct bonding *bond = container_of(work, struct bonding,
2470 arp_work.work);
1da177e4 2471 struct slave *slave, *oldcurrent;
9caff1e7 2472 struct list_head *iter;
6fde8f03 2473 int do_failover = 0, slave_state_changed = 0;
1da177e4 2474
1f2cd845 2475 if (!bond_has_slaves(bond))
1da177e4 2476 goto re_arm;
1da177e4 2477
2e52f4fe 2478 rcu_read_lock();
2479
4740d638 2480 oldcurrent = rcu_dereference(bond->curr_active_slave);
1da177e4
LT
2481 /* see if any of the previous devices are up now (i.e. they have
2482 * xmt and rcv traffic). the curr_active_slave does not come into
8e603460
VF
2483 * the picture unless it is null. also, slave->last_link_up is not
2484 * needed here because we send an arp on each slave and give a slave
2485 * as long as it needs to get the tx/rx within the delta.
1da177e4
LT
2486 * TODO: what about up/down delay in arp mode? it wasn't here before
2487 * so it can wait
2488 */
2e52f4fe 2489 bond_for_each_slave_rcu(bond, slave, iter) {
cb32f2a0
JB
2490 unsigned long trans_start = dev_trans_start(slave->dev);
2491
1da177e4 2492 if (slave->link != BOND_LINK_UP) {
e7f63f1d 2493 if (bond_time_in_interval(bond, trans_start, 1) &&
49f17de7 2494 bond_time_in_interval(bond, slave->last_rx, 1)) {
1da177e4
LT
2495
2496 slave->link = BOND_LINK_UP;
6fde8f03 2497 slave_state_changed = 1;
1da177e4
LT
2498
2499 /* primary_slave has no meaning in round-robin
2500 * mode. the window of a slave being up and
2501 * curr_active_slave being null after enslaving
2502 * is closed.
2503 */
2504 if (!oldcurrent) {
76444f50
VF
2505 netdev_info(bond->dev, "link status definitely up for interface %s\n",
2506 slave->dev->name);
1da177e4
LT
2507 do_failover = 1;
2508 } else {
76444f50
VF
2509 netdev_info(bond->dev, "interface %s is now up\n",
2510 slave->dev->name);
1da177e4
LT
2511 }
2512 }
2513 } else {
2514 /* slave->link == BOND_LINK_UP */
2515
2516 /* not all switches will respond to an arp request
2517 * when the source ip is 0, so don't take the link down
2518 * if we don't know our ip yet
2519 */
e7f63f1d 2520 if (!bond_time_in_interval(bond, trans_start, 2) ||
49f17de7 2521 !bond_time_in_interval(bond, slave->last_rx, 2)) {
1da177e4
LT
2522
2523 slave->link = BOND_LINK_DOWN;
6fde8f03 2524 slave_state_changed = 1;
1da177e4 2525
3d632c3f 2526 if (slave->link_failure_count < UINT_MAX)
1da177e4 2527 slave->link_failure_count++;
1da177e4 2528
76444f50
VF
2529 netdev_info(bond->dev, "interface %s is now down\n",
2530 slave->dev->name);
1da177e4 2531
3d632c3f 2532 if (slave == oldcurrent)
1da177e4 2533 do_failover = 1;
1da177e4
LT
2534 }
2535 }
2536
2537 /* note: if switch is in round-robin mode, all links
2538 * must tx arp to ensure all links rx an arp - otherwise
2539 * links may oscillate or not come up at all; if switch is
2540 * in something like xor mode, there is nothing we can
2541 * do - all replies will be rx'ed on same link causing slaves
2542 * to be unstable during low/no traffic periods
2543 */
b6adc610 2544 if (bond_slave_is_up(slave))
1da177e4 2545 bond_arp_send_all(bond, slave);
1da177e4
LT
2546 }
2547
2e52f4fe 2548 rcu_read_unlock();
2549
6fde8f03 2550 if (do_failover || slave_state_changed) {
2e52f4fe 2551 if (!rtnl_trylock())
2552 goto re_arm;
1da177e4 2553
6fde8f03
DT
2554 if (slave_state_changed) {
2555 bond_slave_state_change(bond);
ee637714
MB
2556 if (BOND_MODE(bond) == BOND_MODE_XOR)
2557 bond_update_slave_arr(bond, NULL);
b8e4500f
NA
2558 }
2559 if (do_failover) {
6fde8f03 2560 block_netpoll_tx();
6fde8f03 2561 bond_select_active_slave(bond);
6fde8f03
DT
2562 unblock_netpoll_tx();
2563 }
2e52f4fe 2564 rtnl_unlock();
1da177e4
LT
2565 }
2566
2567re_arm:
e6d265e8 2568 if (bond->params.arp_interval)
e7f63f1d
VF
2569 queue_delayed_work(bond->wq, &bond->arp_work,
2570 msecs_to_jiffies(bond->params.arp_interval));
1da177e4
LT
2571}
2572
547942ca 2573/* Called to inspect slaves for active-backup mode ARP monitor link state
b2220cad
JV
2574 * changes. Sets new_link in slaves to specify what action should take
2575 * place for the slave. Returns 0 if no changes are found, >0 if changes
2576 * to link states must be committed.
2577 *
8c0bc550 2578 * Called with rcu_read_lock held.
1da177e4 2579 */
e7f63f1d 2580static int bond_ab_arp_inspect(struct bonding *bond)
1da177e4 2581{
def4460c 2582 unsigned long trans_start, last_rx;
9caff1e7 2583 struct list_head *iter;
dec1e90e 2584 struct slave *slave;
dec1e90e 2585 int commit = 0;
da210f55 2586
eb9fa4b0 2587 bond_for_each_slave_rcu(bond, slave, iter) {
b2220cad 2588 slave->new_link = BOND_LINK_NOCHANGE;
def4460c 2589 last_rx = slave_last_rx(bond, slave);
1da177e4 2590
b2220cad 2591 if (slave->link != BOND_LINK_UP) {
e7f63f1d 2592 if (bond_time_in_interval(bond, last_rx, 1)) {
b2220cad
JV
2593 slave->new_link = BOND_LINK_UP;
2594 commit++;
2595 }
b2220cad
JV
2596 continue;
2597 }
1da177e4 2598
547942ca 2599 /* Give slaves 2*delta after being enslaved or made
b2220cad
JV
2600 * active. This avoids bouncing, as the last receive
2601 * times need a full ARP monitor cycle to be updated.
2602 */
8e603460 2603 if (bond_time_in_interval(bond, slave->last_link_up, 2))
b2220cad
JV
2604 continue;
2605
547942ca 2606 /* Backup slave is down if:
b2220cad
JV
2607 * - No current_arp_slave AND
2608 * - more than 3*delta since last receive AND
2609 * - the bond has an IP address
2610 *
2611 * Note: a non-null current_arp_slave indicates
2612 * the curr_active_slave went down and we are
2613 * searching for a new one; under this condition
2614 * we only take the curr_active_slave down - this
2615 * gives each slave a chance to tx/rx traffic
2616 * before being taken out
2617 */
e30bc066 2618 if (!bond_is_active_slave(slave) &&
85741718 2619 !rcu_access_pointer(bond->current_arp_slave) &&
e7f63f1d 2620 !bond_time_in_interval(bond, last_rx, 3)) {
b2220cad
JV
2621 slave->new_link = BOND_LINK_DOWN;
2622 commit++;
2623 }
2624
547942ca 2625 /* Active slave is down if:
b2220cad
JV
2626 * - more than 2*delta since transmitting OR
2627 * - (more than 2*delta since receive AND
2628 * the bond has an IP address)
2629 */
cb32f2a0 2630 trans_start = dev_trans_start(slave->dev);
e30bc066 2631 if (bond_is_active_slave(slave) &&
e7f63f1d
VF
2632 (!bond_time_in_interval(bond, trans_start, 2) ||
2633 !bond_time_in_interval(bond, last_rx, 2))) {
b2220cad
JV
2634 slave->new_link = BOND_LINK_DOWN;
2635 commit++;
2636 }
1da177e4
LT
2637 }
2638
b2220cad
JV
2639 return commit;
2640}
1da177e4 2641
547942ca 2642/* Called to commit link state changes noted by inspection step of
b2220cad
JV
2643 * active-backup mode ARP monitor.
2644 *
eb9fa4b0 2645 * Called with RTNL hold.
b2220cad 2646 */
e7f63f1d 2647static void bond_ab_arp_commit(struct bonding *bond)
b2220cad 2648{
cb32f2a0 2649 unsigned long trans_start;
9caff1e7 2650 struct list_head *iter;
dec1e90e 2651 struct slave *slave;
1da177e4 2652
9caff1e7 2653 bond_for_each_slave(bond, slave, iter) {
b2220cad
JV
2654 switch (slave->new_link) {
2655 case BOND_LINK_NOCHANGE:
2656 continue;
ff59c456 2657
b2220cad 2658 case BOND_LINK_UP:
cb32f2a0 2659 trans_start = dev_trans_start(slave->dev);
4740d638
ED
2660 if (rtnl_dereference(bond->curr_active_slave) != slave ||
2661 (!rtnl_dereference(bond->curr_active_slave) &&
e7f63f1d 2662 bond_time_in_interval(bond, trans_start, 1))) {
85741718
ED
2663 struct slave *current_arp_slave;
2664
2665 current_arp_slave = rtnl_dereference(bond->current_arp_slave);
69a2338e 2666 bond_set_slave_link_state(slave, BOND_LINK_UP);
85741718 2667 if (current_arp_slave) {
5a430974 2668 bond_set_slave_inactive_flags(
85741718 2669 current_arp_slave,
5e5b0665 2670 BOND_SLAVE_NOTIFY_NOW);
85741718 2671 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
5a430974 2672 }
b2220cad 2673
76444f50
VF
2674 netdev_info(bond->dev, "link status definitely up for interface %s\n",
2675 slave->dev->name);
b2220cad 2676
4740d638 2677 if (!rtnl_dereference(bond->curr_active_slave) ||
059b47e8 2678 slave == rtnl_dereference(bond->primary_slave))
b9f60253 2679 goto do_failover;
1da177e4 2680
b9f60253 2681 }
1da177e4 2682
b9f60253 2683 continue;
1da177e4 2684
b2220cad
JV
2685 case BOND_LINK_DOWN:
2686 if (slave->link_failure_count < UINT_MAX)
2687 slave->link_failure_count++;
2688
69a2338e 2689 bond_set_slave_link_state(slave, BOND_LINK_DOWN);
5e5b0665 2690 bond_set_slave_inactive_flags(slave,
2691 BOND_SLAVE_NOTIFY_NOW);
b2220cad 2692
76444f50
VF
2693 netdev_info(bond->dev, "link status definitely down for interface %s, disabling it\n",
2694 slave->dev->name);
b2220cad 2695
4740d638 2696 if (slave == rtnl_dereference(bond->curr_active_slave)) {
85741718 2697 RCU_INIT_POINTER(bond->current_arp_slave, NULL);
b9f60253 2698 goto do_failover;
1da177e4 2699 }
b9f60253
JP
2700
2701 continue;
b2220cad
JV
2702
2703 default:
76444f50
VF
2704 netdev_err(bond->dev, "impossible: new_link %d on slave %s\n",
2705 slave->new_link, slave->dev->name);
b9f60253 2706 continue;
1da177e4 2707 }
1da177e4 2708
b9f60253 2709do_failover:
e843fa50 2710 block_netpoll_tx();
b9f60253 2711 bond_select_active_slave(bond);
e843fa50 2712 unblock_netpoll_tx();
b2220cad 2713 }
1da177e4 2714
b2220cad
JV
2715 bond_set_carrier(bond);
2716}
1da177e4 2717
547942ca 2718/* Send ARP probes for active-backup mode ARP monitor.
b0929915 2719 *
8c0bc550 2720 * Called with rcu_read_lock held.
b2220cad 2721 */
f2ebd477 2722static bool bond_ab_arp_probe(struct bonding *bond)
b2220cad 2723{
eb9fa4b0 2724 struct slave *slave, *before = NULL, *new_slave = NULL,
b0929915 2725 *curr_arp_slave = rcu_dereference(bond->current_arp_slave),
2726 *curr_active_slave = rcu_dereference(bond->curr_active_slave);
4087df87
VF
2727 struct list_head *iter;
2728 bool found = false;
b0929915 2729 bool should_notify_rtnl = BOND_SLAVE_NOTIFY_LATER;
f2ebd477 2730
98b90f26 2731 if (curr_arp_slave && curr_active_slave)
76444f50
VF
2732 netdev_info(bond->dev, "PROBE: c_arp %s && cas %s BAD\n",
2733 curr_arp_slave->dev->name,
2734 curr_active_slave->dev->name);
1da177e4 2735
98b90f26
VF
2736 if (curr_active_slave) {
2737 bond_arp_send_all(bond, curr_active_slave);
b0929915 2738 return should_notify_rtnl;
b2220cad 2739 }
1da177e4 2740
b2220cad
JV
2741 /* if we don't have a curr_active_slave, search for the next available
2742 * backup slave from the current_arp_slave and make it the candidate
2743 * for becoming the curr_active_slave
2744 */
1da177e4 2745
eb9fa4b0 2746 if (!curr_arp_slave) {
b0929915 2747 curr_arp_slave = bond_first_slave_rcu(bond);
2748 if (!curr_arp_slave)
2749 return should_notify_rtnl;
b2220cad 2750 }
1da177e4 2751
b0929915 2752 bond_set_slave_inactive_flags(curr_arp_slave, BOND_SLAVE_NOTIFY_LATER);
059fe7a5 2753
b0929915 2754 bond_for_each_slave_rcu(bond, slave, iter) {
b6adc610 2755 if (!found && !before && bond_slave_is_up(slave))
4087df87 2756 before = slave;
1da177e4 2757
b6adc610 2758 if (found && !new_slave && bond_slave_is_up(slave))
4087df87 2759 new_slave = slave;
b2220cad
JV
2760 /* if the link state is up at this point, we
2761 * mark it down - this can happen if we have
2762 * simultaneous link failures and
2763 * reselect_active_interface doesn't make this
2764 * one the current slave so it is still marked
2765 * up when it is actually down
1da177e4 2766 */
b6adc610 2767 if (!bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
69a2338e 2768 bond_set_slave_link_state(slave, BOND_LINK_DOWN);
b2220cad
JV
2769 if (slave->link_failure_count < UINT_MAX)
2770 slave->link_failure_count++;
1da177e4 2771
5e5b0665 2772 bond_set_slave_inactive_flags(slave,
b0929915 2773 BOND_SLAVE_NOTIFY_LATER);
b2220cad 2774
76444f50
VF
2775 netdev_info(bond->dev, "backup interface %s is now down\n",
2776 slave->dev->name);
1da177e4 2777 }
eb9fa4b0 2778 if (slave == curr_arp_slave)
4087df87 2779 found = true;
b2220cad 2780 }
4087df87
VF
2781
2782 if (!new_slave && before)
2783 new_slave = before;
2784
b0929915 2785 if (!new_slave)
2786 goto check_state;
4087df87 2787
69a2338e 2788 bond_set_slave_link_state(new_slave, BOND_LINK_BACK);
b0929915 2789 bond_set_slave_active_flags(new_slave, BOND_SLAVE_NOTIFY_LATER);
4087df87 2790 bond_arp_send_all(bond, new_slave);
8e603460 2791 new_slave->last_link_up = jiffies;
eb9fa4b0 2792 rcu_assign_pointer(bond->current_arp_slave, new_slave);
f2ebd477 2793
b0929915 2794check_state:
2795 bond_for_each_slave_rcu(bond, slave, iter) {
2796 if (slave->should_notify) {
2797 should_notify_rtnl = BOND_SLAVE_NOTIFY_NOW;
2798 break;
2799 }
2800 }
2801 return should_notify_rtnl;
b2220cad 2802}
1da177e4 2803
6da67d26 2804static void bond_activebackup_arp_mon(struct work_struct *work)
b2220cad
JV
2805{
2806 struct bonding *bond = container_of(work, struct bonding,
2807 arp_work.work);
b0929915 2808 bool should_notify_peers = false;
2809 bool should_notify_rtnl = false;
1f2cd845 2810 int delta_in_ticks;
1da177e4 2811
1f2cd845
DM
2812 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
2813
2814 if (!bond_has_slaves(bond))
b2220cad
JV
2815 goto re_arm;
2816
eb9fa4b0 2817 rcu_read_lock();
b0929915 2818
ad246c99
BH
2819 should_notify_peers = bond_should_notify_peers(bond);
2820
b0929915 2821 if (bond_ab_arp_inspect(bond)) {
2822 rcu_read_unlock();
2823
1f2cd845
DM
2824 /* Race avoidance with bond_close flush of workqueue */
2825 if (!rtnl_trylock()) {
1f2cd845
DM
2826 delta_in_ticks = 1;
2827 should_notify_peers = false;
2828 goto re_arm;
2829 }
b2220cad 2830
1f2cd845 2831 bond_ab_arp_commit(bond);
b0929915 2832
1f2cd845 2833 rtnl_unlock();
b0929915 2834 rcu_read_lock();
1f2cd845
DM
2835 }
2836
b0929915 2837 should_notify_rtnl = bond_ab_arp_probe(bond);
2838 rcu_read_unlock();
ad246c99 2839
80b9d236 2840re_arm:
2841 if (bond->params.arp_interval)
1f2cd845
DM
2842 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
2843
b0929915 2844 if (should_notify_peers || should_notify_rtnl) {
1f2cd845
DM
2845 if (!rtnl_trylock())
2846 return;
b0929915 2847
2848 if (should_notify_peers)
2849 call_netdevice_notifiers(NETDEV_NOTIFY_PEERS,
2850 bond->dev);
2851 if (should_notify_rtnl)
2852 bond_slave_state_notify(bond);
2853
1f2cd845
DM
2854 rtnl_unlock();
2855 }
1da177e4
LT
2856}
2857
1da177e4
LT
2858/*-------------------------- netdev event handling --------------------------*/
2859
547942ca 2860/* Change device name */
1da177e4
LT
2861static int bond_event_changename(struct bonding *bond)
2862{
1da177e4
LT
2863 bond_remove_proc_entry(bond);
2864 bond_create_proc_entry(bond);
7e083840 2865
f073c7ca
TI
2866 bond_debug_reregister(bond);
2867
1da177e4
LT
2868 return NOTIFY_DONE;
2869}
2870
3d632c3f
SH
2871static int bond_master_netdev_event(unsigned long event,
2872 struct net_device *bond_dev)
1da177e4 2873{
454d7c9b 2874 struct bonding *event_bond = netdev_priv(bond_dev);
1da177e4
LT
2875
2876 switch (event) {
2877 case NETDEV_CHANGENAME:
2878 return bond_event_changename(event_bond);
a64d49c3
EB
2879 case NETDEV_UNREGISTER:
2880 bond_remove_proc_entry(event_bond);
2881 break;
2882 case NETDEV_REGISTER:
2883 bond_create_proc_entry(event_bond);
2884 break;
6c8d23f7 2885 case NETDEV_NOTIFY_PEERS:
2886 if (event_bond->send_peer_notif)
2887 event_bond->send_peer_notif--;
2888 break;
1da177e4
LT
2889 default:
2890 break;
2891 }
2892
2893 return NOTIFY_DONE;
2894}
2895
3d632c3f
SH
2896static int bond_slave_netdev_event(unsigned long event,
2897 struct net_device *slave_dev)
1da177e4 2898{
059b47e8 2899 struct slave *slave = bond_slave_get_rtnl(slave_dev), *primary;
6101391d 2900 struct bonding *bond;
2901 struct net_device *bond_dev;
471cb5a3
JP
2902 u32 old_speed;
2903 u8 old_duplex;
1da177e4 2904
6101391d 2905 /* A netdev event can be generated while enslaving a device
2906 * before netdev_rx_handler_register is called in which case
2907 * slave will be NULL
2908 */
2909 if (!slave)
2910 return NOTIFY_DONE;
2911 bond_dev = slave->bond->dev;
2912 bond = slave->bond;
059b47e8 2913 primary = rtnl_dereference(bond->primary_slave);
6101391d 2914
1da177e4
LT
2915 switch (event) {
2916 case NETDEV_UNREGISTER:
8d2ada77 2917 if (bond_dev->type != ARPHRD_ETHER)
471cb5a3
JP
2918 bond_release_and_destroy(bond_dev, slave_dev);
2919 else
2920 bond_release(bond_dev, slave_dev);
1da177e4 2921 break;
98f41f69 2922 case NETDEV_UP:
1da177e4 2923 case NETDEV_CHANGE:
471cb5a3
JP
2924 old_speed = slave->speed;
2925 old_duplex = slave->duplex;
17d04500 2926
471cb5a3 2927 bond_update_speed_duplex(slave);
17d04500 2928
01844098 2929 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
471cb5a3
JP
2930 if (old_speed != slave->speed)
2931 bond_3ad_adapter_speed_changed(slave);
2932 if (old_duplex != slave->duplex)
2933 bond_3ad_adapter_duplex_changed(slave);
17d04500 2934 }
950ddcb1
MB
2935 /* Fallthrough */
2936 case NETDEV_DOWN:
ee637714
MB
2937 /* Refresh slave-array if applicable!
2938 * If the setup does not use miimon or arpmon (mode-specific!),
2939 * then these events will not cause the slave-array to be
2940 * refreshed. This will cause xmit to use a slave that is not
2941 * usable. Avoid such situation by refeshing the array at these
2942 * events. If these (miimon/arpmon) parameters are configured
2943 * then array gets refreshed twice and that should be fine!
2944 */
2945 if (bond_mode_uses_xmit_hash(bond))
2946 bond_update_slave_arr(bond, NULL);
1da177e4 2947 break;
1da177e4 2948 case NETDEV_CHANGEMTU:
547942ca 2949 /* TODO: Should slaves be allowed to
1da177e4
LT
2950 * independently alter their MTU? For
2951 * an active-backup bond, slaves need
2952 * not be the same type of device, so
2953 * MTUs may vary. For other modes,
2954 * slaves arguably should have the
2955 * same MTUs. To do this, we'd need to
2956 * take over the slave's change_mtu
2957 * function for the duration of their
2958 * servitude.
2959 */
2960 break;
2961 case NETDEV_CHANGENAME:
3ec775b9 2962 /* we don't care if we don't have primary set */
ec0865a9 2963 if (!bond_uses_primary(bond) ||
3ec775b9
VF
2964 !bond->params.primary[0])
2965 break;
2966
059b47e8 2967 if (slave == primary) {
3ec775b9 2968 /* slave's name changed - he's no longer primary */
059b47e8 2969 RCU_INIT_POINTER(bond->primary_slave, NULL);
3ec775b9
VF
2970 } else if (!strcmp(slave_dev->name, bond->params.primary)) {
2971 /* we have a new primary slave */
059b47e8 2972 rcu_assign_pointer(bond->primary_slave, slave);
3ec775b9
VF
2973 } else { /* we didn't change primary - exit */
2974 break;
2975 }
2976
76444f50 2977 netdev_info(bond->dev, "Primary slave changed to %s, reselecting active slave\n",
059b47e8 2978 primary ? slave_dev->name : "none");
f80889a5 2979
2980 block_netpoll_tx();
3ec775b9 2981 bond_select_active_slave(bond);
f80889a5 2982 unblock_netpoll_tx();
1da177e4 2983 break;
8531c5ff
AK
2984 case NETDEV_FEAT_CHANGE:
2985 bond_compute_features(bond);
2986 break;
4aa5dee4
JP
2987 case NETDEV_RESEND_IGMP:
2988 /* Propagate to master device */
2989 call_netdevice_notifiers(event, slave->bond->dev);
2990 break;
1da177e4
LT
2991 default:
2992 break;
2993 }
2994
2995 return NOTIFY_DONE;
2996}
2997
547942ca 2998/* bond_netdev_event: handle netdev notifier chain events.
1da177e4
LT
2999 *
3000 * This function receives events for the netdev chain. The caller (an
e041c683 3001 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT
3002 * locks for us to safely manipulate the slave devices (RTNL lock,
3003 * dev_probe_lock).
3004 */
3d632c3f
SH
3005static int bond_netdev_event(struct notifier_block *this,
3006 unsigned long event, void *ptr)
1da177e4 3007{
351638e7 3008 struct net_device *event_dev = netdev_notifier_info_to_dev(ptr);
1da177e4 3009
76444f50 3010 netdev_dbg(event_dev, "event: %lx\n", event);
1da177e4 3011
0b680e75
JV
3012 if (!(event_dev->priv_flags & IFF_BONDING))
3013 return NOTIFY_DONE;
3014
1da177e4 3015 if (event_dev->flags & IFF_MASTER) {
76444f50 3016 netdev_dbg(event_dev, "IFF_MASTER\n");
1da177e4
LT
3017 return bond_master_netdev_event(event, event_dev);
3018 }
3019
3020 if (event_dev->flags & IFF_SLAVE) {
76444f50 3021 netdev_dbg(event_dev, "IFF_SLAVE\n");
1da177e4
LT
3022 return bond_slave_netdev_event(event, event_dev);
3023 }
3024
3025 return NOTIFY_DONE;
3026}
3027
3028static struct notifier_block bond_netdev_notifier = {
3029 .notifier_call = bond_netdev_event,
3030};
3031
169a3e66
JV
3032/*---------------------------- Hashing Policies -----------------------------*/
3033
32819dc1
NA
3034/* L2 hash helper */
3035static inline u32 bond_eth_hash(struct sk_buff *skb)
6b923cb7 3036{
ce04d635 3037 struct ethhdr *ep, hdr_tmp;
6b923cb7 3038
ce04d635
JX
3039 ep = skb_header_pointer(skb, 0, sizeof(hdr_tmp), &hdr_tmp);
3040 if (ep)
3041 return ep->h_dest[5] ^ ep->h_source[5] ^ ep->h_proto;
6b923cb7
JE
3042 return 0;
3043}
3044
32819dc1
NA
3045/* Extract the appropriate headers based on bond's xmit policy */
3046static bool bond_flow_dissect(struct bonding *bond, struct sk_buff *skb,
3047 struct flow_keys *fk)
6f6652be 3048{
32819dc1 3049 const struct ipv6hdr *iph6;
4394542c 3050 const struct iphdr *iph;
32819dc1 3051 int noff, proto = -1;
6b923cb7 3052
32819dc1
NA
3053 if (bond->params.xmit_policy > BOND_XMIT_POLICY_LAYER23)
3054 return skb_flow_dissect(skb, fk);
3055
3056 fk->ports = 0;
3057 noff = skb_network_offset(skb);
3058 if (skb->protocol == htons(ETH_P_IP)) {
054bb880 3059 if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph))))
32819dc1 3060 return false;
6b923cb7 3061 iph = ip_hdr(skb);
32819dc1
NA
3062 fk->src = iph->saddr;
3063 fk->dst = iph->daddr;
3064 noff += iph->ihl << 2;
3065 if (!ip_is_fragment(iph))
3066 proto = iph->protocol;
3067 } else if (skb->protocol == htons(ETH_P_IPV6)) {
054bb880 3068 if (unlikely(!pskb_may_pull(skb, noff + sizeof(*iph6))))
32819dc1
NA
3069 return false;
3070 iph6 = ipv6_hdr(skb);
3071 fk->src = (__force __be32)ipv6_addr_hash(&iph6->saddr);
3072 fk->dst = (__force __be32)ipv6_addr_hash(&iph6->daddr);
3073 noff += sizeof(*iph6);
3074 proto = iph6->nexthdr;
3075 } else {
3076 return false;
6f6652be 3077 }
32819dc1
NA
3078 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34 && proto >= 0)
3079 fk->ports = skb_flow_get_ports(skb, noff, proto);
6f6652be 3080
32819dc1 3081 return true;
6f6652be
JV
3082}
3083
32819dc1
NA
3084/**
3085 * bond_xmit_hash - generate a hash value based on the xmit policy
3086 * @bond: bonding device
3087 * @skb: buffer to use for headers
32819dc1
NA
3088 *
3089 * This function will extract the necessary headers from the skb buffer and use
3090 * them to generate a hash based on the xmit_policy set in the bonding device
169a3e66 3091 */
ee62e868 3092u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb)
169a3e66 3093{
32819dc1
NA
3094 struct flow_keys flow;
3095 u32 hash;
4394542c 3096
32819dc1
NA
3097 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 ||
3098 !bond_flow_dissect(bond, skb, &flow))
ee62e868 3099 return bond_eth_hash(skb);
169a3e66 3100
32819dc1
NA
3101 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER23 ||
3102 bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP23)
3103 hash = bond_eth_hash(skb);
3104 else
3105 hash = (__force u32)flow.ports;
3106 hash ^= (__force u32)flow.dst ^ (__force u32)flow.src;
3107 hash ^= (hash >> 16);
3108 hash ^= (hash >> 8);
3109
ee62e868 3110 return hash;
169a3e66
JV
3111}
3112
1da177e4
LT
3113/*-------------------------- Device entry points ----------------------------*/
3114
fbb0c41b 3115static void bond_work_init_all(struct bonding *bond)
3116{
3117 INIT_DELAYED_WORK(&bond->mcast_work,
3118 bond_resend_igmp_join_requests_delayed);
3119 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3120 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
01844098 3121 if (BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
fbb0c41b 3122 INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon);
3123 else
3124 INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon);
3125 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
ee637714 3126 INIT_DELAYED_WORK(&bond->slave_arr_work, bond_slave_arr_handler);
fbb0c41b 3127}
3128
3129static void bond_work_cancel_all(struct bonding *bond)
3130{
3131 cancel_delayed_work_sync(&bond->mii_work);
3132 cancel_delayed_work_sync(&bond->arp_work);
3133 cancel_delayed_work_sync(&bond->alb_work);
3134 cancel_delayed_work_sync(&bond->ad_work);
3135 cancel_delayed_work_sync(&bond->mcast_work);
ee637714 3136 cancel_delayed_work_sync(&bond->slave_arr_work);
fbb0c41b 3137}
3138
1da177e4
LT
3139static int bond_open(struct net_device *bond_dev)
3140{
454d7c9b 3141 struct bonding *bond = netdev_priv(bond_dev);
9caff1e7 3142 struct list_head *iter;
ba3211cc 3143 struct slave *slave;
1da177e4 3144
ba3211cc 3145 /* reset slave->backup and slave->inactive */
0965a1f3 3146 if (bond_has_slaves(bond)) {
9caff1e7 3147 bond_for_each_slave(bond, slave, iter) {
4740d638
ED
3148 if (bond_uses_primary(bond) &&
3149 slave != rcu_access_pointer(bond->curr_active_slave)) {
5e5b0665 3150 bond_set_slave_inactive_flags(slave,
3151 BOND_SLAVE_NOTIFY_NOW);
8bbe71a5 3152 } else if (BOND_MODE(bond) != BOND_MODE_8023AD) {
5e5b0665 3153 bond_set_slave_active_flags(slave,
3154 BOND_SLAVE_NOTIFY_NOW);
ba3211cc
PP
3155 }
3156 }
ba3211cc 3157 }
ba3211cc 3158
fbb0c41b 3159 bond_work_init_all(bond);
5a37e8ca 3160
58402054 3161 if (bond_is_lb(bond)) {
1da177e4
LT
3162 /* bond_alb_initialize must be called before the timer
3163 * is started.
3164 */
01844098 3165 if (bond_alb_initialize(bond, (BOND_MODE(bond) == BOND_MODE_ALB)))
b473946a 3166 return -ENOMEM;
e9f0fb88
MB
3167 if (bond->params.tlb_dynamic_lb)
3168 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT
3169 }
3170
fbb0c41b 3171 if (bond->params.miimon) /* link check interval, in milliseconds. */
1b76b316 3172 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT
3173
3174 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3175 queue_delayed_work(bond->wq, &bond->arp_work, 0);
3fe68df9 3176 bond->recv_probe = bond_arp_rcv;
1da177e4
LT
3177 }
3178
01844098 3179 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
1b76b316 3180 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4 3181 /* register to receive LACPDUs */
3aba891d 3182 bond->recv_probe = bond_3ad_lacpdu_recv;
fd989c83 3183 bond_3ad_initiate_agg_selection(bond, 1);
1da177e4
LT
3184 }
3185
ee637714
MB
3186 if (bond_mode_uses_xmit_hash(bond))
3187 bond_update_slave_arr(bond, NULL);
3188
1da177e4
LT
3189 return 0;
3190}
3191
3192static int bond_close(struct net_device *bond_dev)
3193{
454d7c9b 3194 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 3195
fbb0c41b 3196 bond_work_cancel_all(bond);
6c8d23f7 3197 bond->send_peer_notif = 0;
ee8487c0 3198 if (bond_is_lb(bond))
1da177e4 3199 bond_alb_deinitialize(bond);
3aba891d 3200 bond->recv_probe = NULL;
1da177e4
LT
3201
3202 return 0;
3203}
3204
28172739
ED
3205static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3206 struct rtnl_link_stats64 *stats)
1da177e4 3207{
454d7c9b 3208 struct bonding *bond = netdev_priv(bond_dev);
28172739 3209 struct rtnl_link_stats64 temp;
9caff1e7 3210 struct list_head *iter;
1da177e4 3211 struct slave *slave;
1da177e4 3212
5f0c5f73 3213 memcpy(stats, &bond->bond_stats, sizeof(*stats));
1da177e4 3214
9caff1e7 3215 bond_for_each_slave(bond, slave, iter) {
be1f3c2c 3216 const struct rtnl_link_stats64 *sstats =
28172739 3217 dev_get_stats(slave->dev, &temp);
5f0c5f73
AG
3218 struct rtnl_link_stats64 *pstats = &slave->slave_stats;
3219
3220 stats->rx_packets += sstats->rx_packets - pstats->rx_packets;
3221 stats->rx_bytes += sstats->rx_bytes - pstats->rx_bytes;
3222 stats->rx_errors += sstats->rx_errors - pstats->rx_errors;
3223 stats->rx_dropped += sstats->rx_dropped - pstats->rx_dropped;
3224
3225 stats->tx_packets += sstats->tx_packets - pstats->tx_packets;;
3226 stats->tx_bytes += sstats->tx_bytes - pstats->tx_bytes;
3227 stats->tx_errors += sstats->tx_errors - pstats->tx_errors;
3228 stats->tx_dropped += sstats->tx_dropped - pstats->tx_dropped;
3229
3230 stats->multicast += sstats->multicast - pstats->multicast;
3231 stats->collisions += sstats->collisions - pstats->collisions;
3232
3233 stats->rx_length_errors += sstats->rx_length_errors - pstats->rx_length_errors;
3234 stats->rx_over_errors += sstats->rx_over_errors - pstats->rx_over_errors;
3235 stats->rx_crc_errors += sstats->rx_crc_errors - pstats->rx_crc_errors;
3236 stats->rx_frame_errors += sstats->rx_frame_errors - pstats->rx_frame_errors;
3237 stats->rx_fifo_errors += sstats->rx_fifo_errors - pstats->rx_fifo_errors;
3238 stats->rx_missed_errors += sstats->rx_missed_errors - pstats->rx_missed_errors;
3239
3240 stats->tx_aborted_errors += sstats->tx_aborted_errors - pstats->tx_aborted_errors;
3241 stats->tx_carrier_errors += sstats->tx_carrier_errors - pstats->tx_carrier_errors;
3242 stats->tx_fifo_errors += sstats->tx_fifo_errors - pstats->tx_fifo_errors;
3243 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors - pstats->tx_heartbeat_errors;
3244 stats->tx_window_errors += sstats->tx_window_errors - pstats->tx_window_errors;
3245
3246 /* save off the slave stats for the next run */
3247 memcpy(pstats, sstats, sizeof(*sstats));
3248 }
3249 memcpy(&bond->bond_stats, stats, sizeof(*stats));
1da177e4
LT
3250
3251 return stats;
3252}
3253
3254static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3255{
080a06e1 3256 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
3257 struct net_device *slave_dev = NULL;
3258 struct ifbond k_binfo;
3259 struct ifbond __user *u_binfo = NULL;
3260 struct ifslave k_sinfo;
3261 struct ifslave __user *u_sinfo = NULL;
3262 struct mii_ioctl_data *mii = NULL;
d1fbd3ed 3263 struct bond_opt_value newval;
387ff911 3264 struct net *net;
1da177e4
LT
3265 int res = 0;
3266
76444f50 3267 netdev_dbg(bond_dev, "bond_ioctl: cmd=%d\n", cmd);
1da177e4
LT
3268
3269 switch (cmd) {
1da177e4
LT
3270 case SIOCGMIIPHY:
3271 mii = if_mii(ifr);
3d632c3f 3272 if (!mii)
1da177e4 3273 return -EINVAL;
3d632c3f 3274
1da177e4
LT
3275 mii->phy_id = 0;
3276 /* Fall Through */
3277 case SIOCGMIIREG:
547942ca 3278 /* We do this again just in case we were called by SIOCGMIIREG
1da177e4
LT
3279 * instead of SIOCGMIIPHY.
3280 */
3281 mii = if_mii(ifr);
3d632c3f 3282 if (!mii)
1da177e4 3283 return -EINVAL;
3d632c3f 3284
1da177e4 3285 if (mii->reg_num == 1) {
1da177e4 3286 mii->val_out = 0;
3d632c3f 3287 if (netif_carrier_ok(bond->dev))
1da177e4 3288 mii->val_out = BMSR_LSTATUS;
1da177e4
LT
3289 }
3290
3291 return 0;
3292 case BOND_INFO_QUERY_OLD:
3293 case SIOCBONDINFOQUERY:
3294 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3295
3d632c3f 3296 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
1da177e4 3297 return -EFAULT;
1da177e4
LT
3298
3299 res = bond_info_query(bond_dev, &k_binfo);
3d632c3f
SH
3300 if (res == 0 &&
3301 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3302 return -EFAULT;
1da177e4
LT
3303
3304 return res;
3305 case BOND_SLAVE_INFO_QUERY_OLD:
3306 case SIOCBONDSLAVEINFOQUERY:
3307 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3308
3d632c3f 3309 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
1da177e4 3310 return -EFAULT;
1da177e4
LT
3311
3312 res = bond_slave_info_query(bond_dev, &k_sinfo);
3d632c3f
SH
3313 if (res == 0 &&
3314 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3315 return -EFAULT;
1da177e4
LT
3316
3317 return res;
3318 default:
1da177e4
LT
3319 break;
3320 }
3321
387ff911
G
3322 net = dev_net(bond_dev);
3323
3324 if (!ns_capable(net->user_ns, CAP_NET_ADMIN))
1da177e4 3325 return -EPERM;
1da177e4 3326
0917b933 3327 slave_dev = __dev_get_by_name(net, ifr->ifr_slave);
1da177e4 3328
76444f50 3329 netdev_dbg(bond_dev, "slave_dev=%p:\n", slave_dev);
1da177e4 3330
3d632c3f 3331 if (!slave_dev)
0917b933 3332 return -ENODEV;
1da177e4 3333
76444f50 3334 netdev_dbg(bond_dev, "slave_dev->name=%s:\n", slave_dev->name);
0917b933
YX
3335 switch (cmd) {
3336 case BOND_ENSLAVE_OLD:
3337 case SIOCBONDENSLAVE:
3338 res = bond_enslave(bond_dev, slave_dev);
3339 break;
3340 case BOND_RELEASE_OLD:
3341 case SIOCBONDRELEASE:
3342 res = bond_release(bond_dev, slave_dev);
3343 break;
3344 case BOND_SETHWADDR_OLD:
3345 case SIOCBONDSETHWADDR:
3346 bond_set_dev_addr(bond_dev, slave_dev);
3347 res = 0;
3348 break;
3349 case BOND_CHANGE_ACTIVE_OLD:
3350 case SIOCBONDCHANGEACTIVE:
d1fbd3ed
NA
3351 bond_opt_initstr(&newval, slave_dev->name);
3352 res = __bond_opt_set(bond, BOND_OPT_ACTIVE_SLAVE, &newval);
0917b933
YX
3353 break;
3354 default:
3355 res = -EOPNOTSUPP;
1da177e4
LT
3356 }
3357
1da177e4
LT
3358 return res;
3359}
3360
d03462b9 3361static void bond_change_rx_flags(struct net_device *bond_dev, int change)
1da177e4 3362{
454d7c9b 3363 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 3364
d03462b9
JP
3365 if (change & IFF_PROMISC)
3366 bond_set_promiscuity(bond,
3367 bond_dev->flags & IFF_PROMISC ? 1 : -1);
3d632c3f 3368
d03462b9
JP
3369 if (change & IFF_ALLMULTI)
3370 bond_set_allmulti(bond,
3371 bond_dev->flags & IFF_ALLMULTI ? 1 : -1);
3372}
1da177e4 3373
303d1cbf 3374static void bond_set_rx_mode(struct net_device *bond_dev)
d03462b9
JP
3375{
3376 struct bonding *bond = netdev_priv(bond_dev);
9caff1e7 3377 struct list_head *iter;
303d1cbf 3378 struct slave *slave;
1da177e4 3379
b3241870 3380 rcu_read_lock();
ec0865a9 3381 if (bond_uses_primary(bond)) {
b3241870 3382 slave = rcu_dereference(bond->curr_active_slave);
303d1cbf
JV
3383 if (slave) {
3384 dev_uc_sync(slave->dev, bond_dev);
3385 dev_mc_sync(slave->dev, bond_dev);
3386 }
303d1cbf 3387 } else {
b3241870 3388 bond_for_each_slave_rcu(bond, slave, iter) {
303d1cbf
JV
3389 dev_uc_sync_multiple(slave->dev, bond_dev);
3390 dev_mc_sync_multiple(slave->dev, bond_dev);
3391 }
1da177e4 3392 }
b3241870 3393 rcu_read_unlock();
1da177e4
LT
3394}
3395
234bcf8a 3396static int bond_neigh_init(struct neighbour *n)
00829823 3397{
234bcf8a 3398 struct bonding *bond = netdev_priv(n->dev);
234bcf8a
SP
3399 const struct net_device_ops *slave_ops;
3400 struct neigh_parms parms;
dec1e90e 3401 struct slave *slave;
234bcf8a
SP
3402 int ret;
3403
dec1e90e 3404 slave = bond_first_slave(bond);
234bcf8a
SP
3405 if (!slave)
3406 return 0;
234bcf8a 3407 slave_ops = slave->dev->netdev_ops;
234bcf8a
SP
3408 if (!slave_ops->ndo_neigh_setup)
3409 return 0;
3410
3411 parms.neigh_setup = NULL;
3412 parms.neigh_cleanup = NULL;
3413 ret = slave_ops->ndo_neigh_setup(slave->dev, &parms);
3414 if (ret)
3415 return ret;
3416
547942ca 3417 /* Assign slave's neigh_cleanup to neighbour in case cleanup is called
234bcf8a
SP
3418 * after the last slave has been detached. Assumes that all slaves
3419 * utilize the same neigh_cleanup (true at this writing as only user
3420 * is ipoib).
3421 */
3422 n->parms->neigh_cleanup = parms.neigh_cleanup;
3423
3424 if (!parms.neigh_setup)
3425 return 0;
3426
3427 return parms.neigh_setup(n);
3428}
3429
547942ca 3430/* The bonding ndo_neigh_setup is called at init time beofre any
234bcf8a
SP
3431 * slave exists. So we must declare proxy setup function which will
3432 * be used at run time to resolve the actual slave neigh param setup.
9918d5bf
VF
3433 *
3434 * It's also called by master devices (such as vlans) to setup their
3435 * underlying devices. In that case - do nothing, we're already set up from
3436 * our init.
234bcf8a
SP
3437 */
3438static int bond_neigh_setup(struct net_device *dev,
3439 struct neigh_parms *parms)
3440{
9918d5bf
VF
3441 /* modify only our neigh_parms */
3442 if (parms->dev == dev)
3443 parms->neigh_setup = bond_neigh_init;
00829823 3444
00829823
SH
3445 return 0;
3446}
3447
547942ca 3448/* Change the MTU of all of a master's slaves to match the master */
1da177e4
LT
3449static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3450{
454d7c9b 3451 struct bonding *bond = netdev_priv(bond_dev);
81f23b13 3452 struct slave *slave, *rollback_slave;
9caff1e7 3453 struct list_head *iter;
1da177e4 3454 int res = 0;
1da177e4 3455
76444f50 3456 netdev_dbg(bond_dev, "bond=%p, new_mtu=%d\n", bond, new_mtu);
1da177e4 3457
9caff1e7 3458 bond_for_each_slave(bond, slave, iter) {
76444f50
VF
3459 netdev_dbg(bond_dev, "s %p c_m %p\n",
3460 slave, slave->dev->netdev_ops->ndo_change_mtu);
e944ef79 3461
1da177e4
LT
3462 res = dev_set_mtu(slave->dev, new_mtu);
3463
3464 if (res) {
3465 /* If we failed to set the slave's mtu to the new value
3466 * we must abort the operation even in ACTIVE_BACKUP
3467 * mode, because if we allow the backup slaves to have
3468 * different mtu values than the active slave we'll
3469 * need to change their mtu when doing a failover. That
3470 * means changing their mtu from timer context, which
3471 * is probably not a good idea.
3472 */
76444f50
VF
3473 netdev_dbg(bond_dev, "err %d %s\n", res,
3474 slave->dev->name);
1da177e4
LT
3475 goto unwind;
3476 }
3477 }
3478
3479 bond_dev->mtu = new_mtu;
3480
3481 return 0;
3482
3483unwind:
3484 /* unwind from head to the slave that failed */
9caff1e7 3485 bond_for_each_slave(bond, rollback_slave, iter) {
1da177e4
LT
3486 int tmp_res;
3487
81f23b13
VF
3488 if (rollback_slave == slave)
3489 break;
3490
3491 tmp_res = dev_set_mtu(rollback_slave->dev, bond_dev->mtu);
1da177e4 3492 if (tmp_res) {
76444f50
VF
3493 netdev_dbg(bond_dev, "unwind err %d dev %s\n",
3494 tmp_res, rollback_slave->dev->name);
1da177e4
LT
3495 }
3496 }
3497
3498 return res;
3499}
3500
547942ca 3501/* Change HW address
1da177e4
LT
3502 *
3503 * Note that many devices must be down to change the HW address, and
3504 * downing the master releases all slaves. We can make bonds full of
3505 * bonding devices to test this, however.
3506 */
3507static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3508{
454d7c9b 3509 struct bonding *bond = netdev_priv(bond_dev);
81f23b13 3510 struct slave *slave, *rollback_slave;
1da177e4 3511 struct sockaddr *sa = addr, tmp_sa;
9caff1e7 3512 struct list_head *iter;
1da177e4 3513 int res = 0;
1da177e4 3514
01844098 3515 if (BOND_MODE(bond) == BOND_MODE_ALB)
eb7cc59a
SH
3516 return bond_alb_set_mac_address(bond_dev, addr);
3517
3518
76444f50 3519 netdev_dbg(bond_dev, "bond=%p\n", bond);
1da177e4 3520
1b5acd29
JV
3521 /* If fail_over_mac is enabled, do nothing and return success.
3522 * Returning an error causes ifenslave to fail.
dd957c57 3523 */
cc689aaa 3524 if (bond->params.fail_over_mac &&
01844098 3525 BOND_MODE(bond) == BOND_MODE_ACTIVEBACKUP)
dd957c57 3526 return 0;
2ab82852 3527
3d632c3f 3528 if (!is_valid_ether_addr(sa->sa_data))
1da177e4 3529 return -EADDRNOTAVAIL;
1da177e4 3530
9caff1e7 3531 bond_for_each_slave(bond, slave, iter) {
76444f50 3532 netdev_dbg(bond_dev, "slave %p %s\n", slave, slave->dev->name);
1da177e4
LT
3533 res = dev_set_mac_address(slave->dev, addr);
3534 if (res) {
3535 /* TODO: consider downing the slave
3536 * and retry ?
3537 * User should expect communications
3538 * breakage anyway until ARP finish
3539 * updating, so...
3540 */
76444f50 3541 netdev_dbg(bond_dev, "err %d %s\n", res, slave->dev->name);
1da177e4
LT
3542 goto unwind;
3543 }
3544 }
3545
3546 /* success */
3547 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
3548 return 0;
3549
3550unwind:
3551 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
3552 tmp_sa.sa_family = bond_dev->type;
3553
3554 /* unwind from head to the slave that failed */
9caff1e7 3555 bond_for_each_slave(bond, rollback_slave, iter) {
1da177e4
LT
3556 int tmp_res;
3557
81f23b13
VF
3558 if (rollback_slave == slave)
3559 break;
3560
3561 tmp_res = dev_set_mac_address(rollback_slave->dev, &tmp_sa);
1da177e4 3562 if (tmp_res) {
76444f50
VF
3563 netdev_dbg(bond_dev, "unwind err %d dev %s\n",
3564 tmp_res, rollback_slave->dev->name);
1da177e4
LT
3565 }
3566 }
3567
3568 return res;
3569}
3570
15077228
NA
3571/**
3572 * bond_xmit_slave_id - transmit skb through slave with slave_id
3573 * @bond: bonding device that is transmitting
3574 * @skb: buffer to transmit
3575 * @slave_id: slave id up to slave_cnt-1 through which to transmit
3576 *
3577 * This function tries to transmit through slave with slave_id but in case
3578 * it fails, it tries to find the first available slave for transmission.
3579 * The skb is consumed in all cases, thus the function is void.
3580 */
da131ddb 3581static void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id)
15077228 3582{
9caff1e7 3583 struct list_head *iter;
15077228
NA
3584 struct slave *slave;
3585 int i = slave_id;
3586
3587 /* Here we start from the slave with slave_id */
9caff1e7 3588 bond_for_each_slave_rcu(bond, slave, iter) {
15077228 3589 if (--i < 0) {
891ab54d 3590 if (bond_slave_can_tx(slave)) {
15077228
NA
3591 bond_dev_queue_xmit(bond, skb, slave->dev);
3592 return;
3593 }
3594 }
3595 }
3596
3597 /* Here we start from the first slave up to slave_id */
3598 i = slave_id;
9caff1e7 3599 bond_for_each_slave_rcu(bond, slave, iter) {
15077228
NA
3600 if (--i < 0)
3601 break;
891ab54d 3602 if (bond_slave_can_tx(slave)) {
15077228
NA
3603 bond_dev_queue_xmit(bond, skb, slave->dev);
3604 return;
3605 }
3606 }
3607 /* no slave that can tx has been found */
31aa860e 3608 bond_tx_drop(bond->dev, skb);
15077228
NA
3609}
3610
73958329
NA
3611/**
3612 * bond_rr_gen_slave_id - generate slave id based on packets_per_slave
3613 * @bond: bonding device to use
3614 *
3615 * Based on the value of the bonding device's packets_per_slave parameter
3616 * this function generates a slave id, which is usually used as the next
3617 * slave to transmit through.
3618 */
3619static u32 bond_rr_gen_slave_id(struct bonding *bond)
3620{
73958329 3621 u32 slave_id;
809fa972
HFS
3622 struct reciprocal_value reciprocal_packets_per_slave;
3623 int packets_per_slave = bond->params.packets_per_slave;
73958329
NA
3624
3625 switch (packets_per_slave) {
3626 case 0:
3627 slave_id = prandom_u32();
3628 break;
3629 case 1:
3630 slave_id = bond->rr_tx_counter;
3631 break;
3632 default:
809fa972
HFS
3633 reciprocal_packets_per_slave =
3634 bond->params.reciprocal_packets_per_slave;
73958329 3635 slave_id = reciprocal_divide(bond->rr_tx_counter,
809fa972 3636 reciprocal_packets_per_slave);
73958329
NA
3637 break;
3638 }
3639 bond->rr_tx_counter++;
3640
3641 return slave_id;
3642}
3643
1da177e4
LT
3644static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
3645{
454d7c9b 3646 struct bonding *bond = netdev_priv(bond_dev);
a2fd940f 3647 struct iphdr *iph = ip_hdr(skb);
15077228 3648 struct slave *slave;
73958329 3649 u32 slave_id;
1da177e4 3650
73958329 3651 /* Start with the curr_active_slave that joined the bond as the
a2fd940f
AG
3652 * default for sending IGMP traffic. For failover purposes one
3653 * needs to maintain some consistency for the interface that will
3654 * send the join/membership reports. The curr_active_slave found
3655 * will send all of this type of traffic.
cf5f9044 3656 */
15077228 3657 if (iph->protocol == IPPROTO_IGMP && skb->protocol == htons(ETH_P_IP)) {
278b2083 3658 slave = rcu_dereference(bond->curr_active_slave);
a64d044e 3659 if (slave)
15077228
NA
3660 bond_dev_queue_xmit(bond, skb, slave->dev);
3661 else
3662 bond_xmit_slave_id(bond, skb, 0);
a2fd940f 3663 } else {
9a72c2da
NA
3664 int slave_cnt = ACCESS_ONCE(bond->slave_cnt);
3665
3666 if (likely(slave_cnt)) {
3667 slave_id = bond_rr_gen_slave_id(bond);
3668 bond_xmit_slave_id(bond, skb, slave_id % slave_cnt);
3669 } else {
31aa860e 3670 bond_tx_drop(bond_dev, skb);
9a72c2da 3671 }
1da177e4 3672 }
0693e88e 3673
ec634fe3 3674 return NETDEV_TX_OK;
1da177e4
LT
3675}
3676
547942ca 3677/* In active-backup mode, we know that bond->curr_active_slave is always valid if
1da177e4
LT
3678 * the bond has a usable interface.
3679 */
3680static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
3681{
454d7c9b 3682 struct bonding *bond = netdev_priv(bond_dev);
71bc3b2d 3683 struct slave *slave;
1da177e4 3684
278b2083 3685 slave = rcu_dereference(bond->curr_active_slave);
71bc3b2d 3686 if (slave)
15077228
NA
3687 bond_dev_queue_xmit(bond, skb, slave->dev);
3688 else
31aa860e 3689 bond_tx_drop(bond_dev, skb);
0693e88e 3690
ec634fe3 3691 return NETDEV_TX_OK;
1da177e4
LT
3692}
3693
ee637714
MB
3694/* Use this to update slave_array when (a) it's not appropriate to update
3695 * slave_array right away (note that update_slave_array() may sleep)
3696 * and / or (b) RTNL is not held.
1da177e4 3697 */
ee637714 3698void bond_slave_arr_work_rearm(struct bonding *bond, unsigned long delay)
1da177e4 3699{
ee637714
MB
3700 queue_delayed_work(bond->wq, &bond->slave_arr_work, delay);
3701}
1da177e4 3702
ee637714
MB
3703/* Slave array work handler. Holds only RTNL */
3704static void bond_slave_arr_handler(struct work_struct *work)
3705{
3706 struct bonding *bond = container_of(work, struct bonding,
3707 slave_arr_work.work);
3708 int ret;
3709
3710 if (!rtnl_trylock())
3711 goto err;
3712
3713 ret = bond_update_slave_arr(bond, NULL);
3714 rtnl_unlock();
3715 if (ret) {
3716 pr_warn_ratelimited("Failed to update slave array from WT\n");
3717 goto err;
3718 }
3719 return;
3720
3721err:
3722 bond_slave_arr_work_rearm(bond, 1);
3723}
3724
3725/* Build the usable slaves array in control path for modes that use xmit-hash
3726 * to determine the slave interface -
3727 * (a) BOND_MODE_8023AD
3728 * (b) BOND_MODE_XOR
3729 * (c) BOND_MODE_TLB && tlb_dynamic_lb == 0
3730 *
3731 * The caller is expected to hold RTNL only and NO other lock!
3732 */
3733int bond_update_slave_arr(struct bonding *bond, struct slave *skipslave)
3734{
3735 struct slave *slave;
3736 struct list_head *iter;
3737 struct bond_up_slave *new_arr, *old_arr;
3738 int slaves_in_agg;
3739 int agg_id = 0;
3740 int ret = 0;
3741
3742#ifdef CONFIG_LOCKDEP
3743 WARN_ON(lockdep_is_held(&bond->mode_lock));
3744#endif
3745
3746 new_arr = kzalloc(offsetof(struct bond_up_slave, arr[bond->slave_cnt]),
3747 GFP_KERNEL);
3748 if (!new_arr) {
3749 ret = -ENOMEM;
3750 pr_err("Failed to build slave-array.\n");
3751 goto out;
3752 }
3753 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
3754 struct ad_info ad_info;
3755
3756 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3757 pr_debug("bond_3ad_get_active_agg_info failed\n");
3758 kfree_rcu(new_arr, rcu);
3759 /* No active aggragator means it's not safe to use
3760 * the previous array.
3761 */
3762 old_arr = rtnl_dereference(bond->slave_arr);
3763 if (old_arr) {
3764 RCU_INIT_POINTER(bond->slave_arr, NULL);
3765 kfree_rcu(old_arr, rcu);
3766 }
3767 goto out;
3768 }
3769 slaves_in_agg = ad_info.ports;
3770 agg_id = ad_info.aggregator_id;
3771 }
3772 bond_for_each_slave(bond, slave, iter) {
3773 if (BOND_MODE(bond) == BOND_MODE_8023AD) {
3774 struct aggregator *agg;
3775
3776 agg = SLAVE_AD_INFO(slave)->port.aggregator;
3777 if (!agg || agg->aggregator_identifier != agg_id)
3778 continue;
3779 }
3780 if (!bond_slave_can_tx(slave))
3781 continue;
3782 if (skipslave == slave)
3783 continue;
3784 new_arr->arr[new_arr->count++] = slave;
3785 }
3786
3787 old_arr = rtnl_dereference(bond->slave_arr);
3788 rcu_assign_pointer(bond->slave_arr, new_arr);
3789 if (old_arr)
3790 kfree_rcu(old_arr, rcu);
3791out:
3792 if (ret != 0 && skipslave) {
3793 int idx;
3794
3795 /* Rare situation where caller has asked to skip a specific
3796 * slave but allocation failed (most likely!). BTW this is
3797 * only possible when the call is initiated from
3798 * __bond_release_one(). In this situation; overwrite the
3799 * skipslave entry in the array with the last entry from the
3800 * array to avoid a situation where the xmit path may choose
3801 * this to-be-skipped slave to send a packet out.
3802 */
3803 old_arr = rtnl_dereference(bond->slave_arr);
3804 for (idx = 0; idx < old_arr->count; idx++) {
3805 if (skipslave == old_arr->arr[idx]) {
3806 old_arr->arr[idx] =
3807 old_arr->arr[old_arr->count-1];
3808 old_arr->count--;
3809 break;
3810 }
3811 }
3812 }
3813 return ret;
3814}
3815
3816/* Use this Xmit function for 3AD as well as XOR modes. The current
3817 * usable slave array is formed in the control path. The xmit function
3818 * just calculates hash and sends the packet out.
3819 */
30369104 3820static int bond_3ad_xor_xmit(struct sk_buff *skb, struct net_device *dev)
ee637714
MB
3821{
3822 struct bonding *bond = netdev_priv(dev);
3823 struct slave *slave;
3824 struct bond_up_slave *slaves;
3825 unsigned int count;
3826
3827 slaves = rcu_dereference(bond->slave_arr);
3828 count = slaves ? ACCESS_ONCE(slaves->count) : 0;
3829 if (likely(count)) {
3830 slave = slaves->arr[bond_xmit_hash(bond, skb) % count];
3831 bond_dev_queue_xmit(bond, skb, slave->dev);
3832 } else {
31aa860e 3833 bond_tx_drop(dev, skb);
ee637714 3834 }
0693e88e 3835
ec634fe3 3836 return NETDEV_TX_OK;
1da177e4
LT
3837}
3838
78a646ce 3839/* in broadcast mode, we send everything to all usable interfaces. */
1da177e4
LT
3840static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
3841{
454d7c9b 3842 struct bonding *bond = netdev_priv(bond_dev);
78a646ce 3843 struct slave *slave = NULL;
9caff1e7 3844 struct list_head *iter;
1da177e4 3845
9caff1e7 3846 bond_for_each_slave_rcu(bond, slave, iter) {
78a646ce
NA
3847 if (bond_is_last_slave(bond, slave))
3848 break;
b6adc610 3849 if (bond_slave_is_up(slave) && slave->link == BOND_LINK_UP) {
78a646ce 3850 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
1da177e4 3851
78a646ce 3852 if (!skb2) {
9152e26d 3853 net_err_ratelimited("%s: Error: %s: skb_clone() failed\n",
3854 bond_dev->name, __func__);
78a646ce 3855 continue;
1da177e4 3856 }
78a646ce 3857 bond_dev_queue_xmit(bond, skb2, slave->dev);
1da177e4
LT
3858 }
3859 }
b6adc610 3860 if (slave && bond_slave_is_up(slave) && slave->link == BOND_LINK_UP)
78a646ce
NA
3861 bond_dev_queue_xmit(bond, skb, slave->dev);
3862 else
31aa860e 3863 bond_tx_drop(bond_dev, skb);
3d632c3f 3864
ec634fe3 3865 return NETDEV_TX_OK;
1da177e4
LT
3866}
3867
3868/*------------------------- Device initialization ---------------------------*/
3869
547942ca 3870/* Lookup the slave that corresponds to a qid */
bb1d9123
AG
3871static inline int bond_slave_override(struct bonding *bond,
3872 struct sk_buff *skb)
3873{
bb1d9123 3874 struct slave *slave = NULL;
9caff1e7 3875 struct list_head *iter;
bb1d9123 3876
0693e88e
MM
3877 if (!skb->queue_mapping)
3878 return 1;
bb1d9123
AG
3879
3880 /* Find out if any slaves have the same mapping as this skb. */
3900f290 3881 bond_for_each_slave_rcu(bond, slave, iter) {
3882 if (slave->queue_id == skb->queue_mapping) {
f5e2dc5d
AN
3883 if (bond_slave_is_up(slave) &&
3884 slave->link == BOND_LINK_UP) {
3900f290 3885 bond_dev_queue_xmit(bond, skb, slave->dev);
3886 return 0;
3887 }
3888 /* If the slave isn't UP, use default transmit policy. */
bb1d9123
AG
3889 break;
3890 }
3891 }
3892
3900f290 3893 return 1;
bb1d9123
AG
3894}
3895
374eeb5a 3896
f663dd9a 3897static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb,
99932d4f 3898 void *accel_priv, select_queue_fallback_t fallback)
bb1d9123 3899{
547942ca 3900 /* This helper function exists to help dev_pick_tx get the correct
fd0e435b 3901 * destination queue. Using a helper function skips a call to
bb1d9123
AG
3902 * skb_tx_hash and will put the skbs in the queue we expect on their
3903 * way down to the bonding driver.
3904 */
fd0e435b
PO
3905 u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0;
3906
547942ca 3907 /* Save the original txq to restore before passing to the driver */
df4ab5b3 3908 qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping;
374eeb5a 3909
fd0e435b 3910 if (unlikely(txq >= dev->real_num_tx_queues)) {
d30ee670 3911 do {
fd0e435b 3912 txq -= dev->real_num_tx_queues;
d30ee670 3913 } while (txq >= dev->real_num_tx_queues);
fd0e435b
PO
3914 }
3915 return txq;
bb1d9123
AG
3916}
3917
0693e88e 3918static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
00829823 3919{
bb1d9123
AG
3920 struct bonding *bond = netdev_priv(dev);
3921
d1e2e5cd
VF
3922 if (bond_should_override_tx_queue(bond) &&
3923 !bond_slave_override(bond, skb))
3924 return NETDEV_TX_OK;
00829823 3925
01844098 3926 switch (BOND_MODE(bond)) {
00829823
SH
3927 case BOND_MODE_ROUNDROBIN:
3928 return bond_xmit_roundrobin(skb, dev);
3929 case BOND_MODE_ACTIVEBACKUP:
3930 return bond_xmit_activebackup(skb, dev);
ee637714 3931 case BOND_MODE_8023AD:
00829823 3932 case BOND_MODE_XOR:
ee637714 3933 return bond_3ad_xor_xmit(skb, dev);
00829823
SH
3934 case BOND_MODE_BROADCAST:
3935 return bond_xmit_broadcast(skb, dev);
00829823 3936 case BOND_MODE_ALB:
00829823 3937 return bond_alb_xmit(skb, dev);
f05b42ea
MB
3938 case BOND_MODE_TLB:
3939 return bond_tlb_xmit(skb, dev);
00829823
SH
3940 default:
3941 /* Should never happen, mode already checked */
76444f50 3942 netdev_err(dev, "Unknown bonding mode %d\n", BOND_MODE(bond));
00829823 3943 WARN_ON_ONCE(1);
31aa860e 3944 bond_tx_drop(dev, skb);
00829823
SH
3945 return NETDEV_TX_OK;
3946 }
3947}
3948
0693e88e
MM
3949static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
3950{
3951 struct bonding *bond = netdev_priv(dev);
3952 netdev_tx_t ret = NETDEV_TX_OK;
3953
547942ca 3954 /* If we risk deadlock from transmitting this in the
0693e88e
MM
3955 * netpoll path, tell netpoll to queue the frame for later tx
3956 */
054bb880 3957 if (unlikely(is_netpoll_tx_blocked(dev)))
0693e88e
MM
3958 return NETDEV_TX_BUSY;
3959
278b2083 3960 rcu_read_lock();
0965a1f3 3961 if (bond_has_slaves(bond))
0693e88e
MM
3962 ret = __bond_start_xmit(skb, dev);
3963 else
31aa860e 3964 bond_tx_drop(dev, skb);
278b2083 3965 rcu_read_unlock();
0693e88e
MM
3966
3967 return ret;
3968}
00829823 3969
bb5b052f
AG
3970static int bond_ethtool_get_settings(struct net_device *bond_dev,
3971 struct ethtool_cmd *ecmd)
3972{
3973 struct bonding *bond = netdev_priv(bond_dev);
bb5b052f 3974 unsigned long speed = 0;
9caff1e7 3975 struct list_head *iter;
dec1e90e 3976 struct slave *slave;
bb5b052f
AG
3977
3978 ecmd->duplex = DUPLEX_UNKNOWN;
3979 ecmd->port = PORT_OTHER;
3980
8557cd74 3981 /* Since bond_slave_can_tx returns false for all inactive or down slaves, we
bb5b052f
AG
3982 * do not need to check mode. Though link speed might not represent
3983 * the true receive or transmit bandwidth (not all modes are symmetric)
3984 * this is an accurate maximum.
3985 */
9caff1e7 3986 bond_for_each_slave(bond, slave, iter) {
8557cd74 3987 if (bond_slave_can_tx(slave)) {
bb5b052f
AG
3988 if (slave->speed != SPEED_UNKNOWN)
3989 speed += slave->speed;
3990 if (ecmd->duplex == DUPLEX_UNKNOWN &&
3991 slave->duplex != DUPLEX_UNKNOWN)
3992 ecmd->duplex = slave->duplex;
3993 }
3994 }
3995 ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN);
dec1e90e 3996
bb5b052f
AG
3997 return 0;
3998}
3999
217df670 4000static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
7826d43f 4001 struct ethtool_drvinfo *drvinfo)
217df670 4002{
7826d43f
JP
4003 strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
4004 strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
4005 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d",
4006 BOND_ABI_VERSION);
217df670
JV
4007}
4008
7282d491 4009static const struct ethtool_ops bond_ethtool_ops = {
217df670 4010 .get_drvinfo = bond_ethtool_get_drvinfo,
bb5b052f 4011 .get_settings = bond_ethtool_get_settings,
fa53ebac 4012 .get_link = ethtool_op_get_link,
8531c5ff
AK
4013};
4014
eb7cc59a 4015static const struct net_device_ops bond_netdev_ops = {
181470fc 4016 .ndo_init = bond_init,
9e71626c 4017 .ndo_uninit = bond_uninit,
eb7cc59a
SH
4018 .ndo_open = bond_open,
4019 .ndo_stop = bond_close,
00829823 4020 .ndo_start_xmit = bond_start_xmit,
bb1d9123 4021 .ndo_select_queue = bond_select_queue,
be1f3c2c 4022 .ndo_get_stats64 = bond_get_stats,
eb7cc59a 4023 .ndo_do_ioctl = bond_do_ioctl,
d03462b9 4024 .ndo_change_rx_flags = bond_change_rx_flags,
303d1cbf 4025 .ndo_set_rx_mode = bond_set_rx_mode,
eb7cc59a 4026 .ndo_change_mtu = bond_change_mtu,
cc0e4070 4027 .ndo_set_mac_address = bond_set_mac_address,
00829823 4028 .ndo_neigh_setup = bond_neigh_setup,
cc0e4070 4029 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
eb7cc59a 4030 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
f6dc31a8 4031#ifdef CONFIG_NET_POLL_CONTROLLER
8a8efa22 4032 .ndo_netpoll_setup = bond_netpoll_setup,
f6dc31a8
WC
4033 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4034 .ndo_poll_controller = bond_poll_controller,
4035#endif
9232ecca
JP
4036 .ndo_add_slave = bond_enslave,
4037 .ndo_del_slave = bond_release,
b2a103e6 4038 .ndo_fix_features = bond_fix_features,
fc8f40d8 4039 .ndo_bridge_setlink = switchdev_port_bridge_setlink,
85fdb956 4040 .ndo_bridge_getlink = switchdev_port_bridge_getlink,
54ba5a0b 4041 .ndo_bridge_dellink = switchdev_port_bridge_dellink,
4847f049 4042 .ndo_features_check = passthru_features_check,
eb7cc59a
SH
4043};
4044
b3f92b63
DG
4045static const struct device_type bond_type = {
4046 .name = "bond",
4047};
4048
9e2e61fb
AW
4049static void bond_destructor(struct net_device *bond_dev)
4050{
4051 struct bonding *bond = netdev_priv(bond_dev);
4052 if (bond->wq)
4053 destroy_workqueue(bond->wq);
4054 free_netdev(bond_dev);
4055}
4056
0a2a78c4 4057void bond_setup(struct net_device *bond_dev)
1da177e4 4058{
454d7c9b 4059 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4060
b7435628 4061 spin_lock_init(&bond->mode_lock);
d2991f75 4062 bond->params = bonding_defaults;
1da177e4
LT
4063
4064 /* Initialize pointers */
1da177e4 4065 bond->dev = bond_dev;
1da177e4
LT
4066
4067 /* Initialize the device entry points */
181470fc 4068 ether_setup(bond_dev);
eb7cc59a 4069 bond_dev->netdev_ops = &bond_netdev_ops;
8531c5ff 4070 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4 4071
9e2e61fb 4072 bond_dev->destructor = bond_destructor;
1da177e4 4073
b3f92b63
DG
4074 SET_NETDEV_DEVTYPE(bond_dev, &bond_type);
4075
1da177e4
LT
4076 /* Initialize the device options */
4077 bond_dev->tx_queue_len = 0;
4078 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
c565b488 4079 bond_dev->priv_flags |= IFF_BONDING | IFF_UNICAST_FLT;
550fd08c 4080 bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING);
181470fc 4081
547942ca 4082 /* don't acquire bond device's netif_tx_lock when transmitting */
1da177e4
LT
4083 bond_dev->features |= NETIF_F_LLTX;
4084
4085 /* By default, we declare the bond to be fully
4086 * VLAN hardware accelerated capable. Special
4087 * care is taken in the various xmit functions
4088 * when there are slaves that are not hw accel
4089 * capable
4090 */
1da177e4 4091
f9399814
WC
4092 /* Don't allow bond devices to change network namespaces. */
4093 bond_dev->features |= NETIF_F_NETNS_LOCAL;
4094
b2a103e6 4095 bond_dev->hw_features = BOND_VLAN_FEATURES |
f646968f
PM
4096 NETIF_F_HW_VLAN_CTAG_TX |
4097 NETIF_F_HW_VLAN_CTAG_RX |
4098 NETIF_F_HW_VLAN_CTAG_FILTER;
b2a103e6 4099
34324dc2 4100 bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM);
24f87d4c 4101 bond_dev->hw_features |= NETIF_F_GSO_ENCAP_ALL;
b2a103e6 4102 bond_dev->features |= bond_dev->hw_features;
1da177e4
LT
4103}
4104
547942ca
NA
4105/* Destroy a bonding device.
4106 * Must be under rtnl_lock when this function is called.
4107 */
c67dfb29 4108static void bond_uninit(struct net_device *bond_dev)
a434e43f 4109{
454d7c9b 4110 struct bonding *bond = netdev_priv(bond_dev);
544a028e
VF
4111 struct list_head *iter;
4112 struct slave *slave;
ee637714 4113 struct bond_up_slave *arr;
a434e43f 4114
f6dc31a8
WC
4115 bond_netpoll_cleanup(bond_dev);
4116
c67dfb29 4117 /* Release the bonded slaves */
544a028e 4118 bond_for_each_slave(bond, slave, iter)
dec1e90e 4119 __bond_release_one(bond_dev, slave->dev, true);
76444f50 4120 netdev_info(bond_dev, "Released all slaves\n");
c67dfb29 4121
ee637714
MB
4122 arr = rtnl_dereference(bond->slave_arr);
4123 if (arr) {
4124 RCU_INIT_POINTER(bond->slave_arr, NULL);
4125 kfree_rcu(arr, rcu);
4126 }
4127
a434e43f
JV
4128 list_del(&bond->bond_list);
4129
f073c7ca 4130 bond_debug_unregister(bond);
a434e43f
JV
4131}
4132
1da177e4
LT
4133/*------------------------- Module initialization ---------------------------*/
4134
1da177e4
LT
4135static int bond_check_params(struct bond_params *params)
4136{
5a5c5fd4 4137 int arp_validate_value, fail_over_mac_value, primary_reselect_value, i;
f3253339 4138 struct bond_opt_value newval;
4139 const struct bond_opt_value *valptr;
8599b52e 4140 int arp_all_targets_value;
6791e466 4141 u16 ad_actor_sys_prio = 0;
d22a5fc0 4142 u16 ad_user_port_key = 0;
f5b2b966 4143
547942ca 4144 /* Convert string parameters. */
1da177e4 4145 if (mode) {
2b3798d5
NA
4146 bond_opt_initstr(&newval, mode);
4147 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_MODE), &newval);
4148 if (!valptr) {
4149 pr_err("Error: Invalid bonding mode \"%s\"\n", mode);
1da177e4
LT
4150 return -EINVAL;
4151 }
2b3798d5 4152 bond_mode = valptr->value;
1da177e4
LT
4153 }
4154
169a3e66
JV
4155 if (xmit_hash_policy) {
4156 if ((bond_mode != BOND_MODE_XOR) &&
f05b42ea
MB
4157 (bond_mode != BOND_MODE_8023AD) &&
4158 (bond_mode != BOND_MODE_TLB)) {
a4aee5c8 4159 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
90194264 4160 bond_mode_name(bond_mode));
169a3e66 4161 } else {
a4b32ce7
NA
4162 bond_opt_initstr(&newval, xmit_hash_policy);
4163 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_XMIT_HASH),
4164 &newval);
4165 if (!valptr) {
a4aee5c8 4166 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
169a3e66
JV
4167 xmit_hash_policy);
4168 return -EINVAL;
4169 }
a4b32ce7 4170 xmit_hashtype = valptr->value;
169a3e66
JV
4171 }
4172 }
4173
1da177e4
LT
4174 if (lacp_rate) {
4175 if (bond_mode != BOND_MODE_8023AD) {
a4aee5c8
JP
4176 pr_info("lacp_rate param is irrelevant in mode %s\n",
4177 bond_mode_name(bond_mode));
1da177e4 4178 } else {
d3131de7
NA
4179 bond_opt_initstr(&newval, lacp_rate);
4180 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_LACP_RATE),
4181 &newval);
4182 if (!valptr) {
a4aee5c8 4183 pr_err("Error: Invalid lacp rate \"%s\"\n",
d3131de7 4184 lacp_rate);
1da177e4
LT
4185 return -EINVAL;
4186 }
d3131de7 4187 lacp_fast = valptr->value;
1da177e4
LT
4188 }
4189 }
4190
fd989c83 4191 if (ad_select) {
548d28bd 4192 bond_opt_initstr(&newval, ad_select);
9e5f5eeb
NA
4193 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_SELECT),
4194 &newval);
4195 if (!valptr) {
4196 pr_err("Error: Invalid ad_select \"%s\"\n", ad_select);
fd989c83
JV
4197 return -EINVAL;
4198 }
9e5f5eeb
NA
4199 params->ad_select = valptr->value;
4200 if (bond_mode != BOND_MODE_8023AD)
91565ebb 4201 pr_warn("ad_select param only affects 802.3ad mode\n");
fd989c83
JV
4202 } else {
4203 params->ad_select = BOND_AD_STABLE;
4204 }
4205
f5841306 4206 if (max_bonds < 0) {
91565ebb
JP
4207 pr_warn("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4208 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT
4209 max_bonds = BOND_DEFAULT_MAX_BONDS;
4210 }
4211
4212 if (miimon < 0) {
91565ebb
JP
4213 pr_warn("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4214 miimon, INT_MAX);
b98d9c66 4215 miimon = 0;
1da177e4
LT
4216 }
4217
4218 if (updelay < 0) {
91565ebb
JP
4219 pr_warn("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4220 updelay, INT_MAX);
1da177e4
LT
4221 updelay = 0;
4222 }
4223
4224 if (downdelay < 0) {
91565ebb
JP
4225 pr_warn("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4226 downdelay, INT_MAX);
1da177e4
LT
4227 downdelay = 0;
4228 }
4229
4230 if ((use_carrier != 0) && (use_carrier != 1)) {
91565ebb
JP
4231 pr_warn("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4232 use_carrier);
1da177e4
LT
4233 use_carrier = 1;
4234 }
4235
ad246c99 4236 if (num_peer_notif < 0 || num_peer_notif > 255) {
91565ebb
JP
4237 pr_warn("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
4238 num_peer_notif);
ad246c99
BH
4239 num_peer_notif = 1;
4240 }
4241
834db4bc 4242 /* reset values for 802.3ad/TLB/ALB */
267bed77 4243 if (!bond_mode_uses_arp(bond_mode)) {
1da177e4 4244 if (!miimon) {
91565ebb
JP
4245 pr_warn("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
4246 pr_warn("Forcing miimon to 100msec\n");
fe9d04af 4247 miimon = BOND_DEFAULT_MIIMON;
1da177e4
LT
4248 }
4249 }
4250
bb1d9123 4251 if (tx_queues < 1 || tx_queues > 255) {
91565ebb
JP
4252 pr_warn("Warning: tx_queues (%d) should be between 1 and 255, resetting to %d\n",
4253 tx_queues, BOND_DEFAULT_TX_QUEUES);
bb1d9123
AG
4254 tx_queues = BOND_DEFAULT_TX_QUEUES;
4255 }
4256
ebd8e497 4257 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
91565ebb
JP
4258 pr_warn("Warning: all_slaves_active module parameter (%d), not of valid value (0/1), so it was set to 0\n",
4259 all_slaves_active);
ebd8e497
AG
4260 all_slaves_active = 0;
4261 }
4262
c2952c31 4263 if (resend_igmp < 0 || resend_igmp > 255) {
91565ebb
JP
4264 pr_warn("Warning: resend_igmp (%d) should be between 0 and 255, resetting to %d\n",
4265 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
c2952c31
FL
4266 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4267 }
4268
aa59d851
NA
4269 bond_opt_initval(&newval, packets_per_slave);
4270 if (!bond_opt_parse(bond_opt_get(BOND_OPT_PACKETS_PER_SLAVE), &newval)) {
73958329
NA
4271 pr_warn("Warning: packets_per_slave (%d) should be between 0 and %u resetting to 1\n",
4272 packets_per_slave, USHRT_MAX);
4273 packets_per_slave = 1;
4274 }
4275
1da177e4 4276 if (bond_mode == BOND_MODE_ALB) {
a4aee5c8
JP
4277 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",
4278 updelay);
1da177e4
LT
4279 }
4280
4281 if (!miimon) {
4282 if (updelay || downdelay) {
4283 /* just warn the user the up/down delay will have
4284 * no effect since miimon is zero...
4285 */
91565ebb
JP
4286 pr_warn("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",
4287 updelay, downdelay);
1da177e4
LT
4288 }
4289 } else {
4290 /* don't allow arp monitoring */
4291 if (arp_interval) {
91565ebb
JP
4292 pr_warn("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4293 miimon, arp_interval);
1da177e4
LT
4294 arp_interval = 0;
4295 }
4296
4297 if ((updelay % miimon) != 0) {
91565ebb
JP
4298 pr_warn("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4299 updelay, miimon, (updelay / miimon) * miimon);
1da177e4
LT
4300 }
4301
4302 updelay /= miimon;
4303
4304 if ((downdelay % miimon) != 0) {
91565ebb
JP
4305 pr_warn("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4306 downdelay, miimon,
4307 (downdelay / miimon) * miimon);
1da177e4
LT
4308 }
4309
4310 downdelay /= miimon;
4311 }
4312
4313 if (arp_interval < 0) {
91565ebb
JP
4314 pr_warn("Warning: arp_interval module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4315 arp_interval, INT_MAX);
7bdb04ed 4316 arp_interval = 0;
1da177e4
LT
4317 }
4318
5a5c5fd4 4319 for (arp_ip_count = 0, i = 0;
4320 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) {
89015c18 4321 __be32 ip;
547942ca
NA
4322
4323 /* not a complete check, but good enough to catch mistakes */
89015c18 4324 if (!in4_pton(arp_ip_target[i], -1, (u8 *)&ip, -1, NULL) ||
2807a9fe 4325 !bond_is_ip_target_ok(ip)) {
91565ebb
JP
4326 pr_warn("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4327 arp_ip_target[i]);
1da177e4
LT
4328 arp_interval = 0;
4329 } else {
0afee4e8
VF
4330 if (bond_get_targets_ip(arp_target, ip) == -1)
4331 arp_target[arp_ip_count++] = ip;
4332 else
91565ebb
JP
4333 pr_warn("Warning: duplicate address %pI4 in arp_ip_target, skipping\n",
4334 &ip);
1da177e4
LT
4335 }
4336 }
4337
4338 if (arp_interval && !arp_ip_count) {
4339 /* don't allow arping if no arp_ip_target given... */
91565ebb
JP
4340 pr_warn("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4341 arp_interval);
1da177e4
LT
4342 arp_interval = 0;
4343 }
4344
f5b2b966 4345 if (arp_validate) {
f5b2b966 4346 if (!arp_interval) {
a4aee5c8 4347 pr_err("arp_validate requires arp_interval\n");
f5b2b966
JV
4348 return -EINVAL;
4349 }
4350
16228881
NA
4351 bond_opt_initstr(&newval, arp_validate);
4352 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_VALIDATE),
4353 &newval);
4354 if (!valptr) {
a4aee5c8 4355 pr_err("Error: invalid arp_validate \"%s\"\n",
16228881 4356 arp_validate);
f5b2b966
JV
4357 return -EINVAL;
4358 }
16228881
NA
4359 arp_validate_value = valptr->value;
4360 } else {
f5b2b966 4361 arp_validate_value = 0;
16228881 4362 }
f5b2b966 4363
8599b52e
VF
4364 arp_all_targets_value = 0;
4365 if (arp_all_targets) {
edf36b24
NA
4366 bond_opt_initstr(&newval, arp_all_targets);
4367 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_ARP_ALL_TARGETS),
4368 &newval);
4369 if (!valptr) {
8599b52e
VF
4370 pr_err("Error: invalid arp_all_targets_value \"%s\"\n",
4371 arp_all_targets);
4372 arp_all_targets_value = 0;
edf36b24
NA
4373 } else {
4374 arp_all_targets_value = valptr->value;
8599b52e
VF
4375 }
4376 }
4377
1da177e4 4378 if (miimon) {
a4aee5c8 4379 pr_info("MII link monitoring set to %d ms\n", miimon);
1da177e4 4380 } else if (arp_interval) {
16228881
NA
4381 valptr = bond_opt_get_val(BOND_OPT_ARP_VALIDATE,
4382 arp_validate_value);
a4aee5c8 4383 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
16228881 4384 arp_interval, valptr->string, arp_ip_count);
1da177e4
LT
4385
4386 for (i = 0; i < arp_ip_count; i++)
90194264 4387 pr_cont(" %s", arp_ip_target[i]);
1da177e4 4388
90194264 4389 pr_cont("\n");
1da177e4 4390
b8a9787e 4391 } else if (max_bonds) {
1da177e4
LT
4392 /* miimon and arp_interval not set, we need one so things
4393 * work as expected, see bonding.txt for details
4394 */
90194264 4395 pr_debug("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");
1da177e4
LT
4396 }
4397
ec0865a9 4398 if (primary && !bond_mode_uses_primary(bond_mode)) {
1da177e4
LT
4399 /* currently, using a primary only makes sense
4400 * in active backup, TLB or ALB modes
4401 */
91565ebb
JP
4402 pr_warn("Warning: %s primary device specified but has no effect in %s mode\n",
4403 primary, bond_mode_name(bond_mode));
1da177e4
LT
4404 primary = NULL;
4405 }
4406
a549952a 4407 if (primary && primary_reselect) {
388d3a6d
NA
4408 bond_opt_initstr(&newval, primary_reselect);
4409 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_PRIMARY_RESELECT),
4410 &newval);
4411 if (!valptr) {
a4aee5c8 4412 pr_err("Error: Invalid primary_reselect \"%s\"\n",
388d3a6d 4413 primary_reselect);
a549952a
JP
4414 return -EINVAL;
4415 }
388d3a6d 4416 primary_reselect_value = valptr->value;
a549952a
JP
4417 } else {
4418 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
4419 }
4420
3915c1e8 4421 if (fail_over_mac) {
1df6b6aa
NA
4422 bond_opt_initstr(&newval, fail_over_mac);
4423 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_FAIL_OVER_MAC),
4424 &newval);
4425 if (!valptr) {
a4aee5c8 4426 pr_err("Error: invalid fail_over_mac \"%s\"\n",
1df6b6aa 4427 fail_over_mac);
3915c1e8
JV
4428 return -EINVAL;
4429 }
1df6b6aa 4430 fail_over_mac_value = valptr->value;
3915c1e8 4431 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
91565ebb 4432 pr_warn("Warning: fail_over_mac only affects active-backup mode\n");
3915c1e8
JV
4433 } else {
4434 fail_over_mac_value = BOND_FOM_NONE;
4435 }
dd957c57 4436
6791e466
MB
4437 bond_opt_initstr(&newval, "default");
4438 valptr = bond_opt_parse(
4439 bond_opt_get(BOND_OPT_AD_ACTOR_SYS_PRIO),
4440 &newval);
4441 if (!valptr) {
4442 pr_err("Error: No ad_actor_sys_prio default value");
4443 return -EINVAL;
4444 }
4445 ad_actor_sys_prio = valptr->value;
4446
d22a5fc0
MB
4447 valptr = bond_opt_parse(bond_opt_get(BOND_OPT_AD_USER_PORT_KEY),
4448 &newval);
4449 if (!valptr) {
4450 pr_err("Error: No ad_user_port_key default value");
4451 return -EINVAL;
4452 }
4453 ad_user_port_key = valptr->value;
4454
3a7129e5 4455 if (lp_interval == 0) {
91565ebb
JP
4456 pr_warn("Warning: ip_interval must be between 1 and %d, so it was reset to %d\n",
4457 INT_MAX, BOND_ALB_DEFAULT_LP_INTERVAL);
3a7129e5 4458 lp_interval = BOND_ALB_DEFAULT_LP_INTERVAL;
4459 }
4460
1da177e4
LT
4461 /* fill params struct with the proper values */
4462 params->mode = bond_mode;
169a3e66 4463 params->xmit_policy = xmit_hashtype;
1da177e4 4464 params->miimon = miimon;
ad246c99 4465 params->num_peer_notif = num_peer_notif;
1da177e4 4466 params->arp_interval = arp_interval;
f5b2b966 4467 params->arp_validate = arp_validate_value;
8599b52e 4468 params->arp_all_targets = arp_all_targets_value;
1da177e4
LT
4469 params->updelay = updelay;
4470 params->downdelay = downdelay;
4471 params->use_carrier = use_carrier;
4472 params->lacp_fast = lacp_fast;
4473 params->primary[0] = 0;
a549952a 4474 params->primary_reselect = primary_reselect_value;
3915c1e8 4475 params->fail_over_mac = fail_over_mac_value;
bb1d9123 4476 params->tx_queues = tx_queues;
ebd8e497 4477 params->all_slaves_active = all_slaves_active;
c2952c31 4478 params->resend_igmp = resend_igmp;
655f8919 4479 params->min_links = min_links;
3a7129e5 4480 params->lp_interval = lp_interval;
809fa972 4481 params->packets_per_slave = packets_per_slave;
e9f0fb88 4482 params->tlb_dynamic_lb = 1; /* Default value */
6791e466 4483 params->ad_actor_sys_prio = ad_actor_sys_prio;
74514957 4484 eth_zero_addr(params->ad_actor_system);
d22a5fc0 4485 params->ad_user_port_key = ad_user_port_key;
809fa972
HFS
4486 if (packets_per_slave > 0) {
4487 params->reciprocal_packets_per_slave =
4488 reciprocal_value(packets_per_slave);
4489 } else {
4490 /* reciprocal_packets_per_slave is unused if
4491 * packets_per_slave is 0 or 1, just initialize it
4492 */
4493 params->reciprocal_packets_per_slave =
4494 (struct reciprocal_value) { 0 };
4495 }
4496
1da177e4
LT
4497 if (primary) {
4498 strncpy(params->primary, primary, IFNAMSIZ);
4499 params->primary[IFNAMSIZ - 1] = 0;
4500 }
4501
4502 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4503
4504 return 0;
4505}
4506
0daa2303 4507static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 4508static struct lock_class_key bonding_netdev_addr_lock_key;
49ee4920 4509static struct lock_class_key bonding_tx_busylock_key;
0daa2303 4510
e8a0464c
DM
4511static void bond_set_lockdep_class_one(struct net_device *dev,
4512 struct netdev_queue *txq,
4513 void *_unused)
c773e847
DM
4514{
4515 lockdep_set_class(&txq->_xmit_lock,
4516 &bonding_netdev_xmit_lock_key);
4517}
4518
4519static void bond_set_lockdep_class(struct net_device *dev)
4520{
cf508b12
DM
4521 lockdep_set_class(&dev->addr_list_lock,
4522 &bonding_netdev_addr_lock_key);
e8a0464c 4523 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
49ee4920 4524 dev->qdisc_tx_busylock = &bonding_tx_busylock_key;
c773e847
DM
4525}
4526
547942ca 4527/* Called from registration process */
181470fc
SH
4528static int bond_init(struct net_device *bond_dev)
4529{
4530 struct bonding *bond = netdev_priv(bond_dev);
ec87fd3b 4531 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
181470fc 4532
76444f50 4533 netdev_dbg(bond_dev, "Begin bond_init\n");
181470fc
SH
4534
4535 bond->wq = create_singlethread_workqueue(bond_dev->name);
4536 if (!bond->wq)
4537 return -ENOMEM;
4538
4539 bond_set_lockdep_class(bond_dev);
4540
ec87fd3b 4541 list_add_tail(&bond->bond_list, &bn->dev_list);
181470fc 4542
6151b3d4 4543 bond_prepare_sysfs_group(bond);
22bedad3 4544
f073c7ca
TI
4545 bond_debug_register(bond);
4546
409cc1f8
JP
4547 /* Ensure valid dev_addr */
4548 if (is_zero_ether_addr(bond_dev->dev_addr) &&
97a1e639 4549 bond_dev->addr_assign_type == NET_ADDR_PERM)
409cc1f8 4550 eth_hw_addr_random(bond_dev);
409cc1f8 4551
181470fc
SH
4552 return 0;
4553}
4554
0a2a78c4 4555unsigned int bond_get_num_tx_queues(void)
d5da4510 4556{
efacb309 4557 return tx_queues;
d5da4510
JP
4558}
4559
dfe60397 4560/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 4561 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW
4562 * Caller must NOT hold rtnl_lock; we need to release it here before we
4563 * set up our sysfs entries.
4564 */
ec87fd3b 4565int bond_create(struct net *net, const char *name)
dfe60397
MW
4566{
4567 struct net_device *bond_dev;
e913fb27
P
4568 struct bonding *bond;
4569 struct alb_bond_info *bond_info;
dfe60397
MW
4570 int res;
4571
4572 rtnl_lock();
027ea041 4573
1c5cae81 4574 bond_dev = alloc_netdev_mq(sizeof(struct bonding),
c835a677 4575 name ? name : "bond%d", NET_NAME_UNKNOWN,
1c5cae81 4576 bond_setup, tx_queues);
dfe60397 4577 if (!bond_dev) {
a4aee5c8 4578 pr_err("%s: eek! can't alloc netdev!\n", name);
9e2e61fb
AW
4579 rtnl_unlock();
4580 return -ENOMEM;
dfe60397
MW
4581 }
4582
e913fb27
P
4583 /*
4584 * Initialize rx_hashtbl_used_head to RLB_NULL_INDEX.
4585 * It is set to 0 by default which is wrong.
4586 */
4587 bond = netdev_priv(bond_dev);
4588 bond_info = &(BOND_ALB_INFO(bond));
4589 bond_info->rx_hashtbl_used_head = RLB_NULL_INDEX;
4590
ec87fd3b 4591 dev_net_set(bond_dev, net);
88ead977
EB
4592 bond_dev->rtnl_link_ops = &bond_link_ops;
4593
dfe60397 4594 res = register_netdevice(bond_dev);
0daa2303 4595
e826eafa
PO
4596 netif_carrier_off(bond_dev);
4597
7e083840 4598 rtnl_unlock();
9e2e61fb
AW
4599 if (res < 0)
4600 bond_destructor(bond_dev);
30c15ba9 4601 return res;
dfe60397
MW
4602}
4603
2c8c1e72 4604static int __net_init bond_net_init(struct net *net)
ec87fd3b 4605{
15449745 4606 struct bond_net *bn = net_generic(net, bond_net_id);
ec87fd3b
EB
4607
4608 bn->net = net;
4609 INIT_LIST_HEAD(&bn->dev_list);
4610
ec87fd3b 4611 bond_create_proc_dir(bn);
4c22400a 4612 bond_create_sysfs(bn);
87a7b84b 4613
15449745 4614 return 0;
ec87fd3b
EB
4615}
4616
2c8c1e72 4617static void __net_exit bond_net_exit(struct net *net)
ec87fd3b 4618{
15449745 4619 struct bond_net *bn = net_generic(net, bond_net_id);
69b0216a 4620 struct bonding *bond, *tmp_bond;
4621 LIST_HEAD(list);
ec87fd3b 4622
4c22400a 4623 bond_destroy_sysfs(bn);
69b0216a 4624
4625 /* Kill off any bonds created after unregistering bond rtnl ops */
4626 rtnl_lock();
4627 list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list)
4628 unregister_netdevice_queue(bond->dev, &list);
4629 unregister_netdevice_many(&list);
4630 rtnl_unlock();
23fa5c2c
VF
4631
4632 bond_destroy_proc_dir(bn);
ec87fd3b
EB
4633}
4634
4635static struct pernet_operations bond_net_ops = {
4636 .init = bond_net_init,
4637 .exit = bond_net_exit,
15449745
EB
4638 .id = &bond_net_id,
4639 .size = sizeof(struct bond_net),
ec87fd3b
EB
4640};
4641
1da177e4
LT
4642static int __init bonding_init(void)
4643{
1da177e4
LT
4644 int i;
4645 int res;
4646
bd33acc3 4647 pr_info("%s", bond_version);
1da177e4 4648
dfe60397 4649 res = bond_check_params(&bonding_defaults);
3d632c3f 4650 if (res)
dfe60397 4651 goto out;
1da177e4 4652
15449745 4653 res = register_pernet_subsys(&bond_net_ops);
ec87fd3b
EB
4654 if (res)
4655 goto out;
027ea041 4656
0a2a78c4 4657 res = bond_netlink_init();
88ead977 4658 if (res)
6639104b 4659 goto err_link;
88ead977 4660
f073c7ca
TI
4661 bond_create_debugfs();
4662
1da177e4 4663 for (i = 0; i < max_bonds; i++) {
ec87fd3b 4664 res = bond_create(&init_net, NULL);
dfe60397
MW
4665 if (res)
4666 goto err;
1da177e4
LT
4667 }
4668
1da177e4 4669 register_netdevice_notifier(&bond_netdev_notifier);
dfe60397 4670out:
1da177e4 4671 return res;
88ead977 4672err:
db298686 4673 bond_destroy_debugfs();
0a2a78c4 4674 bond_netlink_fini();
6639104b 4675err_link:
15449745 4676 unregister_pernet_subsys(&bond_net_ops);
88ead977 4677 goto out;
dfe60397 4678
1da177e4
LT
4679}
4680
4681static void __exit bonding_exit(void)
4682{
4683 unregister_netdevice_notifier(&bond_netdev_notifier);
4684
f073c7ca 4685 bond_destroy_debugfs();
ae68c398 4686
0a2a78c4 4687 bond_netlink_fini();
ffcdedb6 4688 unregister_pernet_subsys(&bond_net_ops);
e843fa50
NH
4689
4690#ifdef CONFIG_NET_POLL_CONTROLLER
547942ca 4691 /* Make sure we don't have an imbalance on our netpoll blocking */
fb4fa76a 4692 WARN_ON(atomic_read(&netpoll_block_tx));
e843fa50 4693#endif
1da177e4
LT
4694}
4695
4696module_init(bonding_init);
4697module_exit(bonding_exit);
4698MODULE_LICENSE("GPL");
4699MODULE_VERSION(DRV_VERSION);
4700MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4701MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
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