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irda: convert to netdev_tx_t
[net-next-2.6.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/system.h>
1da177e4 56#include <asm/dma.h>
3d632c3f 57#include <linux/uaccess.h>
1da177e4
LT
58#include <linux/errno.h>
59#include <linux/netdevice.h>
60#include <linux/inetdevice.h>
a816c7c7 61#include <linux/igmp.h>
1da177e4
LT
62#include <linux/etherdevice.h>
63#include <linux/skbuff.h>
64#include <net/sock.h>
65#include <linux/rtnetlink.h>
66#include <linux/proc_fs.h>
67#include <linux/seq_file.h>
68#include <linux/smp.h>
69#include <linux/if_ether.h>
70#include <net/arp.h>
71#include <linux/mii.h>
72#include <linux/ethtool.h>
73#include <linux/if_vlan.h>
74#include <linux/if_bonding.h>
b63bb739 75#include <linux/jiffies.h>
c3ade5ca 76#include <net/route.h>
457c4cbc 77#include <net/net_namespace.h>
1da177e4
LT
78#include "bonding.h"
79#include "bond_3ad.h"
80#include "bond_alb.h"
81
82/*---------------------------- Module parameters ----------------------------*/
83
84/* monitor all links that often (in milliseconds). <=0 disables monitoring */
85#define BOND_LINK_MON_INTERV 0
86#define BOND_LINK_ARP_INTERV 0
87
88static int max_bonds = BOND_DEFAULT_MAX_BONDS;
7893b249 89static int num_grat_arp = 1;
305d552a 90static int num_unsol_na = 1;
1da177e4 91static int miimon = BOND_LINK_MON_INTERV;
3d632c3f
SH
92static int updelay;
93static int downdelay;
1da177e4 94static int use_carrier = 1;
3d632c3f
SH
95static char *mode;
96static char *primary;
97static char *lacp_rate;
98static char *ad_select;
99static char *xmit_hash_policy;
1da177e4 100static int arp_interval = BOND_LINK_ARP_INTERV;
3d632c3f
SH
101static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
102static char *arp_validate;
103static char *fail_over_mac;
d2991f75 104static struct bond_params bonding_defaults;
1da177e4
LT
105
106module_param(max_bonds, int, 0);
107MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
7893b249
MS
108module_param(num_grat_arp, int, 0644);
109MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
305d552a
BH
110module_param(num_unsol_na, int, 0644);
111MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
1da177e4
LT
112module_param(miimon, int, 0);
113MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
114module_param(updelay, int, 0);
115MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
116module_param(downdelay, int, 0);
2ac47660
MW
117MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
118 "in milliseconds");
1da177e4 119module_param(use_carrier, int, 0);
2ac47660
MW
120MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
121 "0 for off, 1 for on (default)");
1da177e4 122module_param(mode, charp, 0);
2ac47660
MW
123MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
124 "1 for active-backup, 2 for balance-xor, "
125 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
126 "6 for balance-alb");
1da177e4
LT
127module_param(primary, charp, 0);
128MODULE_PARM_DESC(primary, "Primary network device to use");
129module_param(lacp_rate, charp, 0);
2ac47660
MW
130MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
131 "(slow/fast)");
fd989c83
JV
132module_param(ad_select, charp, 0);
133MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
169a3e66 134module_param(xmit_hash_policy, charp, 0);
2ac47660
MW
135MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
136 ", 1 for layer 3+4");
1da177e4
LT
137module_param(arp_interval, int, 0);
138MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
139module_param_array(arp_ip_target, charp, NULL, 0);
140MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV
141module_param(arp_validate, charp, 0);
142MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
3915c1e8
JV
143module_param(fail_over_mac, charp, 0);
144MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
1da177e4
LT
145
146/*----------------------------- Global variables ----------------------------*/
147
f71e1309 148static const char * const version =
1da177e4
LT
149 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
150
12479f9a 151LIST_HEAD(bond_dev_list);
1da177e4
LT
152
153#ifdef CONFIG_PROC_FS
3d632c3f 154static struct proc_dir_entry *bond_proc_dir;
1da177e4
LT
155#endif
156
3d632c3f
SH
157static __be32 arp_target[BOND_MAX_ARP_TARGETS];
158static int arp_ip_count;
1da177e4 159static int bond_mode = BOND_MODE_ROUNDROBIN;
3d632c3f
SH
160static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
161static int lacp_fast;
217df670 162
1da177e4 163
e97fd7c6 164const struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT
165{ "slow", AD_LACP_SLOW},
166{ "fast", AD_LACP_FAST},
167{ NULL, -1},
168};
169
e97fd7c6 170const struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT
171{ "balance-rr", BOND_MODE_ROUNDROBIN},
172{ "active-backup", BOND_MODE_ACTIVEBACKUP},
173{ "balance-xor", BOND_MODE_XOR},
174{ "broadcast", BOND_MODE_BROADCAST},
175{ "802.3ad", BOND_MODE_8023AD},
176{ "balance-tlb", BOND_MODE_TLB},
177{ "balance-alb", BOND_MODE_ALB},
178{ NULL, -1},
179};
180
e97fd7c6 181const struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV
182{ "layer2", BOND_XMIT_POLICY_LAYER2},
183{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
6f6652be 184{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
169a3e66
JV
185{ NULL, -1},
186};
187
e97fd7c6 188const struct bond_parm_tbl arp_validate_tbl[] = {
f5b2b966
JV
189{ "none", BOND_ARP_VALIDATE_NONE},
190{ "active", BOND_ARP_VALIDATE_ACTIVE},
191{ "backup", BOND_ARP_VALIDATE_BACKUP},
192{ "all", BOND_ARP_VALIDATE_ALL},
193{ NULL, -1},
194};
195
e97fd7c6 196const struct bond_parm_tbl fail_over_mac_tbl[] = {
3915c1e8
JV
197{ "none", BOND_FOM_NONE},
198{ "active", BOND_FOM_ACTIVE},
199{ "follow", BOND_FOM_FOLLOW},
200{ NULL, -1},
201};
202
fd989c83
JV
203struct bond_parm_tbl ad_select_tbl[] = {
204{ "stable", BOND_AD_STABLE},
205{ "bandwidth", BOND_AD_BANDWIDTH},
206{ "count", BOND_AD_COUNT},
207{ NULL, -1},
208};
209
1da177e4
LT
210/*-------------------------- Forward declarations ---------------------------*/
211
c3ade5ca 212static void bond_send_gratuitous_arp(struct bonding *bond);
181470fc 213static int bond_init(struct net_device *bond_dev);
c50b85d0 214static void bond_deinit(struct net_device *bond_dev);
1da177e4
LT
215
216/*---------------------------- General routines -----------------------------*/
217
4ad072c9 218static const char *bond_mode_name(int mode)
1da177e4 219{
77afc92b
HE
220 static const char *names[] = {
221 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
222 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
223 [BOND_MODE_XOR] = "load balancing (xor)",
224 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
3d632c3f 225 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
77afc92b
HE
226 [BOND_MODE_TLB] = "transmit load balancing",
227 [BOND_MODE_ALB] = "adaptive load balancing",
228 };
229
230 if (mode < 0 || mode > BOND_MODE_ALB)
1da177e4 231 return "unknown";
77afc92b
HE
232
233 return names[mode];
1da177e4
LT
234}
235
236/*---------------------------------- VLAN -----------------------------------*/
237
238/**
239 * bond_add_vlan - add a new vlan id on bond
240 * @bond: bond that got the notification
241 * @vlan_id: the vlan id to add
242 *
243 * Returns -ENOMEM if allocation failed.
244 */
245static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
246{
247 struct vlan_entry *vlan;
248
5a03cdb7 249 pr_debug("bond: %s, vlan id %d\n",
3d632c3f 250 (bond ? bond->dev->name : "None"), vlan_id);
1da177e4 251
305d552a 252 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
3d632c3f 253 if (!vlan)
1da177e4 254 return -ENOMEM;
1da177e4
LT
255
256 INIT_LIST_HEAD(&vlan->vlan_list);
257 vlan->vlan_id = vlan_id;
258
259 write_lock_bh(&bond->lock);
260
261 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
262
263 write_unlock_bh(&bond->lock);
264
5a03cdb7 265 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
1da177e4
LT
266
267 return 0;
268}
269
270/**
271 * bond_del_vlan - delete a vlan id from bond
272 * @bond: bond that got the notification
273 * @vlan_id: the vlan id to delete
274 *
275 * returns -ENODEV if @vlan_id was not found in @bond.
276 */
277static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
278{
0883beca 279 struct vlan_entry *vlan;
1da177e4
LT
280 int res = -ENODEV;
281
5a03cdb7 282 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
1da177e4
LT
283
284 write_lock_bh(&bond->lock);
285
0883beca 286 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
1da177e4
LT
287 if (vlan->vlan_id == vlan_id) {
288 list_del(&vlan->vlan_list);
289
58402054 290 if (bond_is_lb(bond))
1da177e4 291 bond_alb_clear_vlan(bond, vlan_id);
1da177e4 292
5a03cdb7 293 pr_debug("removed VLAN ID %d from bond %s\n", vlan_id,
1da177e4
LT
294 bond->dev->name);
295
296 kfree(vlan);
297
298 if (list_empty(&bond->vlan_list) &&
299 (bond->slave_cnt == 0)) {
300 /* Last VLAN removed and no slaves, so
301 * restore block on adding VLANs. This will
302 * be removed once new slaves that are not
303 * VLAN challenged will be added.
304 */
305 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
306 }
307
308 res = 0;
309 goto out;
310 }
311 }
312
5a03cdb7 313 pr_debug("couldn't find VLAN ID %d in bond %s\n", vlan_id,
1da177e4
LT
314 bond->dev->name);
315
316out:
317 write_unlock_bh(&bond->lock);
318 return res;
319}
320
321/**
322 * bond_has_challenged_slaves
323 * @bond: the bond we're working on
324 *
325 * Searches the slave list. Returns 1 if a vlan challenged slave
326 * was found, 0 otherwise.
327 *
328 * Assumes bond->lock is held.
329 */
330static int bond_has_challenged_slaves(struct bonding *bond)
331{
332 struct slave *slave;
333 int i;
334
335 bond_for_each_slave(bond, slave, i) {
336 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 337 pr_debug("found VLAN challenged slave - %s\n",
1da177e4
LT
338 slave->dev->name);
339 return 1;
340 }
341 }
342
5a03cdb7 343 pr_debug("no VLAN challenged slaves found\n");
1da177e4
LT
344 return 0;
345}
346
347/**
348 * bond_next_vlan - safely skip to the next item in the vlans list.
349 * @bond: the bond we're working on
350 * @curr: item we're advancing from
351 *
352 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
353 * or @curr->next otherwise (even if it is @curr itself again).
3d632c3f 354 *
1da177e4
LT
355 * Caller must hold bond->lock
356 */
357struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
358{
359 struct vlan_entry *next, *last;
360
3d632c3f 361 if (list_empty(&bond->vlan_list))
1da177e4 362 return NULL;
1da177e4
LT
363
364 if (!curr) {
365 next = list_entry(bond->vlan_list.next,
366 struct vlan_entry, vlan_list);
367 } else {
368 last = list_entry(bond->vlan_list.prev,
369 struct vlan_entry, vlan_list);
370 if (last == curr) {
371 next = list_entry(bond->vlan_list.next,
372 struct vlan_entry, vlan_list);
373 } else {
374 next = list_entry(curr->vlan_list.next,
375 struct vlan_entry, vlan_list);
376 }
377 }
378
379 return next;
380}
381
382/**
383 * bond_dev_queue_xmit - Prepare skb for xmit.
3d632c3f 384 *
1da177e4
LT
385 * @bond: bond device that got this skb for tx.
386 * @skb: hw accel VLAN tagged skb to transmit
387 * @slave_dev: slave that is supposed to xmit this skbuff
3d632c3f 388 *
1da177e4
LT
389 * When the bond gets an skb to transmit that is
390 * already hardware accelerated VLAN tagged, and it
391 * needs to relay this skb to a slave that is not
392 * hw accel capable, the skb needs to be "unaccelerated",
393 * i.e. strip the hwaccel tag and re-insert it as part
394 * of the payload.
395 */
3d632c3f
SH
396int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
397 struct net_device *slave_dev)
1da177e4 398{
966bc6f4 399 unsigned short uninitialized_var(vlan_id);
1da177e4
LT
400
401 if (!list_empty(&bond->vlan_list) &&
402 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
403 vlan_get_tag(skb, &vlan_id) == 0) {
404 skb->dev = slave_dev;
405 skb = vlan_put_tag(skb, vlan_id);
406 if (!skb) {
407 /* vlan_put_tag() frees the skb in case of error,
408 * so return success here so the calling functions
409 * won't attempt to free is again.
410 */
411 return 0;
412 }
413 } else {
414 skb->dev = slave_dev;
415 }
416
417 skb->priority = 1;
418 dev_queue_xmit(skb);
419
420 return 0;
421}
422
423/*
424 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
425 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
426 * lock because:
427 * a. This operation is performed in IOCTL context,
428 * b. The operation is protected by the RTNL semaphore in the 8021q code,
429 * c. Holding a lock with BH disabled while directly calling a base driver
430 * entry point is generally a BAD idea.
3d632c3f 431 *
1da177e4
LT
432 * The design of synchronization/protection for this operation in the 8021q
433 * module is good for one or more VLAN devices over a single physical device
434 * and cannot be extended for a teaming solution like bonding, so there is a
435 * potential race condition here where a net device from the vlan group might
436 * be referenced (either by a base driver or the 8021q code) while it is being
437 * removed from the system. However, it turns out we're not making matters
438 * worse, and if it works for regular VLAN usage it will work here too.
439*/
440
441/**
442 * bond_vlan_rx_register - Propagates registration to slaves
443 * @bond_dev: bonding net device that got called
444 * @grp: vlan group being registered
445 */
3d632c3f
SH
446static void bond_vlan_rx_register(struct net_device *bond_dev,
447 struct vlan_group *grp)
1da177e4 448{
454d7c9b 449 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
450 struct slave *slave;
451 int i;
452
453 bond->vlgrp = grp;
454
455 bond_for_each_slave(bond, slave, i) {
456 struct net_device *slave_dev = slave->dev;
eb7cc59a 457 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
458
459 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH
460 slave_ops->ndo_vlan_rx_register) {
461 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
1da177e4
LT
462 }
463 }
464}
465
466/**
467 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
468 * @bond_dev: bonding net device that got called
469 * @vid: vlan id being added
470 */
471static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
472{
454d7c9b 473 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
474 struct slave *slave;
475 int i, res;
476
477 bond_for_each_slave(bond, slave, i) {
478 struct net_device *slave_dev = slave->dev;
eb7cc59a 479 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
480
481 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a
SH
482 slave_ops->ndo_vlan_rx_add_vid) {
483 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
1da177e4
LT
484 }
485 }
486
487 res = bond_add_vlan(bond, vid);
488 if (res) {
3d632c3f 489 pr_err(DRV_NAME
4e0952c7 490 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT
491 bond_dev->name, vid);
492 }
493}
494
495/**
496 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
497 * @bond_dev: bonding net device that got called
498 * @vid: vlan id being removed
499 */
500static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
501{
454d7c9b 502 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
503 struct slave *slave;
504 struct net_device *vlan_dev;
505 int i, res;
506
507 bond_for_each_slave(bond, slave, i) {
508 struct net_device *slave_dev = slave->dev;
eb7cc59a 509 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
510
511 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a 512 slave_ops->ndo_vlan_rx_kill_vid) {
1da177e4
LT
513 /* Save and then restore vlan_dev in the grp array,
514 * since the slave's driver might clear it.
515 */
5c15bdec 516 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
eb7cc59a 517 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 518 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT
519 }
520 }
521
522 res = bond_del_vlan(bond, vid);
523 if (res) {
3d632c3f 524 pr_err(DRV_NAME
4e0952c7 525 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT
526 bond_dev->name, vid);
527 }
528}
529
530static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
531{
532 struct vlan_entry *vlan;
eb7cc59a 533 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
534
535 write_lock_bh(&bond->lock);
536
eb7cc59a 537 if (list_empty(&bond->vlan_list))
1da177e4 538 goto out;
1da177e4
LT
539
540 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH
541 slave_ops->ndo_vlan_rx_register)
542 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
1da177e4
LT
543
544 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 545 !(slave_ops->ndo_vlan_rx_add_vid))
1da177e4 546 goto out;
1da177e4 547
eb7cc59a
SH
548 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
549 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
1da177e4
LT
550
551out:
552 write_unlock_bh(&bond->lock);
553}
554
3d632c3f
SH
555static void bond_del_vlans_from_slave(struct bonding *bond,
556 struct net_device *slave_dev)
1da177e4 557{
eb7cc59a 558 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
559 struct vlan_entry *vlan;
560 struct net_device *vlan_dev;
561
562 write_lock_bh(&bond->lock);
563
eb7cc59a 564 if (list_empty(&bond->vlan_list))
1da177e4 565 goto out;
1da177e4
LT
566
567 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 568 !(slave_ops->ndo_vlan_rx_kill_vid))
1da177e4 569 goto unreg;
1da177e4
LT
570
571 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
572 /* Save and then restore vlan_dev in the grp array,
573 * since the slave's driver might clear it.
574 */
5c15bdec 575 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
eb7cc59a 576 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 577 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT
578 }
579
580unreg:
581 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH
582 slave_ops->ndo_vlan_rx_register)
583 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
1da177e4
LT
584
585out:
586 write_unlock_bh(&bond->lock);
587}
588
589/*------------------------------- Link status -------------------------------*/
590
ff59c456
JV
591/*
592 * Set the carrier state for the master according to the state of its
593 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
594 * do special 802.3ad magic.
595 *
596 * Returns zero if carrier state does not change, nonzero if it does.
597 */
598static int bond_set_carrier(struct bonding *bond)
599{
600 struct slave *slave;
601 int i;
602
603 if (bond->slave_cnt == 0)
604 goto down;
605
606 if (bond->params.mode == BOND_MODE_8023AD)
607 return bond_3ad_set_carrier(bond);
608
609 bond_for_each_slave(bond, slave, i) {
610 if (slave->link == BOND_LINK_UP) {
611 if (!netif_carrier_ok(bond->dev)) {
612 netif_carrier_on(bond->dev);
613 return 1;
614 }
615 return 0;
616 }
617 }
618
619down:
620 if (netif_carrier_ok(bond->dev)) {
621 netif_carrier_off(bond->dev);
622 return 1;
623 }
624 return 0;
625}
626
1da177e4
LT
627/*
628 * Get link speed and duplex from the slave's base driver
629 * using ethtool. If for some reason the call fails or the
630 * values are invalid, fake speed and duplex to 100/Full
631 * and return error.
632 */
633static int bond_update_speed_duplex(struct slave *slave)
634{
635 struct net_device *slave_dev = slave->dev;
1da177e4 636 struct ethtool_cmd etool;
61a44b9c 637 int res;
1da177e4
LT
638
639 /* Fake speed and duplex */
640 slave->speed = SPEED_100;
641 slave->duplex = DUPLEX_FULL;
642
61a44b9c
MW
643 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
644 return -1;
1da177e4 645
61a44b9c
MW
646 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
647 if (res < 0)
1da177e4 648 return -1;
1da177e4 649
1da177e4
LT
650 switch (etool.speed) {
651 case SPEED_10:
652 case SPEED_100:
653 case SPEED_1000:
94dbffd5 654 case SPEED_10000:
1da177e4
LT
655 break;
656 default:
657 return -1;
658 }
659
660 switch (etool.duplex) {
661 case DUPLEX_FULL:
662 case DUPLEX_HALF:
663 break;
664 default:
665 return -1;
666 }
667
668 slave->speed = etool.speed;
669 slave->duplex = etool.duplex;
670
671 return 0;
672}
673
674/*
675 * if <dev> supports MII link status reporting, check its link status.
676 *
677 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
3d632c3f 678 * depending upon the setting of the use_carrier parameter.
1da177e4
LT
679 *
680 * Return either BMSR_LSTATUS, meaning that the link is up (or we
681 * can't tell and just pretend it is), or 0, meaning that the link is
682 * down.
683 *
684 * If reporting is non-zero, instead of faking link up, return -1 if
685 * both ETHTOOL and MII ioctls fail (meaning the device does not
686 * support them). If use_carrier is set, return whatever it says.
687 * It'd be nice if there was a good way to tell if a driver supports
688 * netif_carrier, but there really isn't.
689 */
3d632c3f
SH
690static int bond_check_dev_link(struct bonding *bond,
691 struct net_device *slave_dev, int reporting)
1da177e4 692{
eb7cc59a 693 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
3d632c3f 694 static int (*ioctl)(struct net_device *, struct ifreq *, int);
1da177e4
LT
695 struct ifreq ifr;
696 struct mii_ioctl_data *mii;
1da177e4 697
6c988853
PG
698 if (!reporting && !netif_running(slave_dev))
699 return 0;
700
eb7cc59a 701 if (bond->params.use_carrier)
1da177e4 702 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
1da177e4 703
29112f4e
JP
704 /* Try to get link status using Ethtool first. */
705 if (slave_dev->ethtool_ops) {
706 if (slave_dev->ethtool_ops->get_link) {
707 u32 link;
708
709 link = slave_dev->ethtool_ops->get_link(slave_dev);
710
711 return link ? BMSR_LSTATUS : 0;
712 }
713 }
714
3d632c3f 715 /* Ethtool can't be used, fallback to MII ioctls. */
eb7cc59a 716 ioctl = slave_ops->ndo_do_ioctl;
1da177e4
LT
717 if (ioctl) {
718 /* TODO: set pointer to correct ioctl on a per team member */
719 /* bases to make this more efficient. that is, once */
720 /* we determine the correct ioctl, we will always */
721 /* call it and not the others for that team */
722 /* member. */
723
724 /*
725 * We cannot assume that SIOCGMIIPHY will also read a
726 * register; not all network drivers (e.g., e100)
727 * support that.
728 */
729
730 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
731 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
732 mii = if_mii(&ifr);
733 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
734 mii->reg_num = MII_BMSR;
3d632c3f
SH
735 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
736 return mii->val_out & BMSR_LSTATUS;
1da177e4
LT
737 }
738 }
739
1da177e4
LT
740 /*
741 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 742 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT
743 * cannot report link status). If not reporting, pretend
744 * we're ok.
745 */
3d632c3f 746 return reporting ? -1 : BMSR_LSTATUS;
1da177e4
LT
747}
748
749/*----------------------------- Multicast list ------------------------------*/
750
751/*
752 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
753 */
3d632c3f
SH
754static inline int bond_is_dmi_same(const struct dev_mc_list *dmi1,
755 const struct dev_mc_list *dmi2)
1da177e4
LT
756{
757 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
758 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
759}
760
761/*
762 * returns dmi entry if found, NULL otherwise
763 */
3d632c3f
SH
764static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi,
765 struct dev_mc_list *mc_list)
1da177e4
LT
766{
767 struct dev_mc_list *idmi;
768
769 for (idmi = mc_list; idmi; idmi = idmi->next) {
3d632c3f 770 if (bond_is_dmi_same(dmi, idmi))
1da177e4 771 return idmi;
1da177e4
LT
772 }
773
774 return NULL;
775}
776
777/*
778 * Push the promiscuity flag down to appropriate slaves
779 */
7e1a1ac1 780static int bond_set_promiscuity(struct bonding *bond, int inc)
1da177e4 781{
7e1a1ac1 782 int err = 0;
1da177e4
LT
783 if (USES_PRIMARY(bond->params.mode)) {
784 /* write lock already acquired */
785 if (bond->curr_active_slave) {
7e1a1ac1
WC
786 err = dev_set_promiscuity(bond->curr_active_slave->dev,
787 inc);
1da177e4
LT
788 }
789 } else {
790 struct slave *slave;
791 int i;
792 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC
793 err = dev_set_promiscuity(slave->dev, inc);
794 if (err)
795 return err;
1da177e4
LT
796 }
797 }
7e1a1ac1 798 return err;
1da177e4
LT
799}
800
801/*
802 * Push the allmulti flag down to all slaves
803 */
7e1a1ac1 804static int bond_set_allmulti(struct bonding *bond, int inc)
1da177e4 805{
7e1a1ac1 806 int err = 0;
1da177e4
LT
807 if (USES_PRIMARY(bond->params.mode)) {
808 /* write lock already acquired */
809 if (bond->curr_active_slave) {
7e1a1ac1
WC
810 err = dev_set_allmulti(bond->curr_active_slave->dev,
811 inc);
1da177e4
LT
812 }
813 } else {
814 struct slave *slave;
815 int i;
816 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC
817 err = dev_set_allmulti(slave->dev, inc);
818 if (err)
819 return err;
1da177e4
LT
820 }
821 }
7e1a1ac1 822 return err;
1da177e4
LT
823}
824
825/*
826 * Add a Multicast address to slaves
827 * according to mode
828 */
829static void bond_mc_add(struct bonding *bond, void *addr, int alen)
830{
831 if (USES_PRIMARY(bond->params.mode)) {
832 /* write lock already acquired */
3d632c3f 833 if (bond->curr_active_slave)
1da177e4 834 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
1da177e4
LT
835 } else {
836 struct slave *slave;
837 int i;
3d632c3f
SH
838
839 bond_for_each_slave(bond, slave, i)
1da177e4 840 dev_mc_add(slave->dev, addr, alen, 0);
1da177e4
LT
841 }
842}
843
844/*
845 * Remove a multicast address from slave
846 * according to mode
847 */
848static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
849{
850 if (USES_PRIMARY(bond->params.mode)) {
851 /* write lock already acquired */
3d632c3f
SH
852 if (bond->curr_active_slave)
853 dev_mc_delete(bond->curr_active_slave->dev, addr,
854 alen, 0);
1da177e4
LT
855 } else {
856 struct slave *slave;
857 int i;
858 bond_for_each_slave(bond, slave, i) {
859 dev_mc_delete(slave->dev, addr, alen, 0);
860 }
861 }
862}
863
a816c7c7
JV
864
865/*
866 * Retrieve the list of registered multicast addresses for the bonding
867 * device and retransmit an IGMP JOIN request to the current active
868 * slave.
869 */
870static void bond_resend_igmp_join_requests(struct bonding *bond)
871{
872 struct in_device *in_dev;
873 struct ip_mc_list *im;
874
875 rcu_read_lock();
876 in_dev = __in_dev_get_rcu(bond->dev);
877 if (in_dev) {
3d632c3f 878 for (im = in_dev->mc_list; im; im = im->next)
a816c7c7 879 ip_mc_rejoin_group(im);
a816c7c7
JV
880 }
881
882 rcu_read_unlock();
883}
884
1da177e4
LT
885/*
886 * Totally destroys the mc_list in bond
887 */
888static void bond_mc_list_destroy(struct bonding *bond)
889{
890 struct dev_mc_list *dmi;
891
892 dmi = bond->mc_list;
893 while (dmi) {
894 bond->mc_list = dmi->next;
895 kfree(dmi);
896 dmi = bond->mc_list;
897 }
3d632c3f
SH
898
899 bond->mc_list = NULL;
1da177e4
LT
900}
901
902/*
903 * Copy all the Multicast addresses from src to the bonding device dst
904 */
de54f390 905static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 906 gfp_t gfp_flag)
1da177e4
LT
907{
908 struct dev_mc_list *dmi, *new_dmi;
909
910 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 911 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT
912
913 if (!new_dmi) {
914 /* FIXME: Potential memory leak !!! */
915 return -ENOMEM;
916 }
917
918 new_dmi->next = bond->mc_list;
919 bond->mc_list = new_dmi;
920 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
921 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
922 new_dmi->dmi_users = dmi->dmi_users;
923 new_dmi->dmi_gusers = dmi->dmi_gusers;
924 }
925
926 return 0;
927}
928
929/*
930 * flush all members of flush->mc_list from device dev->mc_list
931 */
3d632c3f
SH
932static void bond_mc_list_flush(struct net_device *bond_dev,
933 struct net_device *slave_dev)
1da177e4 934{
454d7c9b 935 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
936 struct dev_mc_list *dmi;
937
3d632c3f 938 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
1da177e4 939 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1da177e4
LT
940
941 if (bond->params.mode == BOND_MODE_8023AD) {
942 /* del lacpdu mc addr from mc list */
943 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
944
945 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
946 }
947}
948
949/*--------------------------- Active slave change ---------------------------*/
950
951/*
952 * Update the mc list and multicast-related flags for the new and
953 * old active slaves (if any) according to the multicast mode, and
954 * promiscuous flags unconditionally.
955 */
3d632c3f
SH
956static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
957 struct slave *old_active)
1da177e4
LT
958{
959 struct dev_mc_list *dmi;
960
3d632c3f 961 if (!USES_PRIMARY(bond->params.mode))
1da177e4
LT
962 /* nothing to do - mc list is already up-to-date on
963 * all slaves
964 */
965 return;
1da177e4
LT
966
967 if (old_active) {
3d632c3f 968 if (bond->dev->flags & IFF_PROMISC)
1da177e4 969 dev_set_promiscuity(old_active->dev, -1);
1da177e4 970
3d632c3f 971 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 972 dev_set_allmulti(old_active->dev, -1);
1da177e4 973
3d632c3f
SH
974 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
975 dev_mc_delete(old_active->dev, dmi->dmi_addr,
976 dmi->dmi_addrlen, 0);
1da177e4
LT
977 }
978
979 if (new_active) {
7e1a1ac1 980 /* FIXME: Signal errors upstream. */
3d632c3f 981 if (bond->dev->flags & IFF_PROMISC)
1da177e4 982 dev_set_promiscuity(new_active->dev, 1);
1da177e4 983
3d632c3f 984 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 985 dev_set_allmulti(new_active->dev, 1);
1da177e4 986
3d632c3f
SH
987 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next)
988 dev_mc_add(new_active->dev, dmi->dmi_addr,
989 dmi->dmi_addrlen, 0);
a816c7c7 990 bond_resend_igmp_join_requests(bond);
1da177e4
LT
991 }
992}
993
3915c1e8
JV
994/*
995 * bond_do_fail_over_mac
996 *
997 * Perform special MAC address swapping for fail_over_mac settings
998 *
999 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
1000 */
1001static void bond_do_fail_over_mac(struct bonding *bond,
1002 struct slave *new_active,
1003 struct slave *old_active)
1f78d9f9
HE
1004 __releases(&bond->curr_slave_lock)
1005 __releases(&bond->lock)
1006 __acquires(&bond->lock)
1007 __acquires(&bond->curr_slave_lock)
3915c1e8
JV
1008{
1009 u8 tmp_mac[ETH_ALEN];
1010 struct sockaddr saddr;
1011 int rv;
1012
1013 switch (bond->params.fail_over_mac) {
1014 case BOND_FOM_ACTIVE:
1015 if (new_active)
1016 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1017 new_active->dev->addr_len);
1018 break;
1019 case BOND_FOM_FOLLOW:
1020 /*
1021 * if new_active && old_active, swap them
1022 * if just old_active, do nothing (going to no active slave)
1023 * if just new_active, set new_active to bond's MAC
1024 */
1025 if (!new_active)
1026 return;
1027
1028 write_unlock_bh(&bond->curr_slave_lock);
1029 read_unlock(&bond->lock);
1030
1031 if (old_active) {
1032 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1033 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1034 ETH_ALEN);
1035 saddr.sa_family = new_active->dev->type;
1036 } else {
1037 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1038 saddr.sa_family = bond->dev->type;
1039 }
1040
1041 rv = dev_set_mac_address(new_active->dev, &saddr);
1042 if (rv) {
3d632c3f 1043 pr_err(DRV_NAME
3915c1e8
JV
1044 ": %s: Error %d setting MAC of slave %s\n",
1045 bond->dev->name, -rv, new_active->dev->name);
1046 goto out;
1047 }
1048
1049 if (!old_active)
1050 goto out;
1051
1052 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1053 saddr.sa_family = old_active->dev->type;
1054
1055 rv = dev_set_mac_address(old_active->dev, &saddr);
1056 if (rv)
3d632c3f 1057 pr_err(DRV_NAME
3915c1e8
JV
1058 ": %s: Error %d setting MAC of slave %s\n",
1059 bond->dev->name, -rv, new_active->dev->name);
1060out:
1061 read_lock(&bond->lock);
1062 write_lock_bh(&bond->curr_slave_lock);
1063 break;
1064 default:
3d632c3f 1065 pr_err(DRV_NAME
3915c1e8
JV
1066 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1067 bond->dev->name, bond->params.fail_over_mac);
1068 break;
1069 }
1070
1071}
1072
1073
1da177e4
LT
1074/**
1075 * find_best_interface - select the best available slave to be the active one
1076 * @bond: our bonding struct
1077 *
1078 * Warning: Caller must hold curr_slave_lock for writing.
1079 */
1080static struct slave *bond_find_best_slave(struct bonding *bond)
1081{
1082 struct slave *new_active, *old_active;
1083 struct slave *bestslave = NULL;
1084 int mintime = bond->params.updelay;
1085 int i;
1086
1087 new_active = old_active = bond->curr_active_slave;
1088
1089 if (!new_active) { /* there were no active slaves left */
3d632c3f 1090 if (bond->slave_cnt > 0) /* found one slave */
1da177e4 1091 new_active = bond->first_slave;
3d632c3f 1092 else
1da177e4 1093 return NULL; /* still no slave, return NULL */
1da177e4
LT
1094 }
1095
3d632c3f
SH
1096 /*
1097 * first try the primary link; if arping, a link must tx/rx
1098 * traffic before it can be considered the curr_active_slave.
1099 * also, we would skip slaves between the curr_active_slave
1100 * and primary_slave that may be up and able to arp
1da177e4
LT
1101 */
1102 if ((bond->primary_slave) &&
1103 (!bond->params.arp_interval) &&
1104 (IS_UP(bond->primary_slave->dev))) {
1105 new_active = bond->primary_slave;
1106 }
1107
1108 /* remember where to stop iterating over the slaves */
1109 old_active = new_active;
1110
1111 bond_for_each_slave_from(bond, new_active, i, old_active) {
1112 if (IS_UP(new_active->dev)) {
1113 if (new_active->link == BOND_LINK_UP) {
1114 return new_active;
1115 } else if (new_active->link == BOND_LINK_BACK) {
1116 /* link up, but waiting for stabilization */
1117 if (new_active->delay < mintime) {
1118 mintime = new_active->delay;
1119 bestslave = new_active;
1120 }
1121 }
1122 }
1123 }
1124
1125 return bestslave;
1126}
1127
1128/**
1129 * change_active_interface - change the active slave into the specified one
1130 * @bond: our bonding struct
1131 * @new: the new slave to make the active one
1132 *
1133 * Set the new slave to the bond's settings and unset them on the old
1134 * curr_active_slave.
1135 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1136 *
1137 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1138 * because it is apparently the best available slave we have, even though its
1139 * updelay hasn't timed out yet.
1140 *
3915c1e8
JV
1141 * If new_active is not NULL, caller must hold bond->lock for read and
1142 * curr_slave_lock for write_bh.
1da177e4 1143 */
a77b5325 1144void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT
1145{
1146 struct slave *old_active = bond->curr_active_slave;
1147
3d632c3f 1148 if (old_active == new_active)
1da177e4 1149 return;
1da177e4
LT
1150
1151 if (new_active) {
b2220cad
JV
1152 new_active->jiffies = jiffies;
1153
1da177e4
LT
1154 if (new_active->link == BOND_LINK_BACK) {
1155 if (USES_PRIMARY(bond->params.mode)) {
3d632c3f 1156 pr_info(DRV_NAME
1da177e4
LT
1157 ": %s: making interface %s the new "
1158 "active one %d ms earlier.\n",
1159 bond->dev->name, new_active->dev->name,
1160 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1161 }
1162
1163 new_active->delay = 0;
1164 new_active->link = BOND_LINK_UP;
1da177e4 1165
3d632c3f 1166 if (bond->params.mode == BOND_MODE_8023AD)
1da177e4 1167 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1da177e4 1168
58402054 1169 if (bond_is_lb(bond))
1da177e4 1170 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1da177e4
LT
1171 } else {
1172 if (USES_PRIMARY(bond->params.mode)) {
3d632c3f 1173 pr_info(DRV_NAME
1da177e4
LT
1174 ": %s: making interface %s the new "
1175 "active one.\n",
1176 bond->dev->name, new_active->dev->name);
1177 }
1178 }
1179 }
1180
3d632c3f 1181 if (USES_PRIMARY(bond->params.mode))
1da177e4 1182 bond_mc_swap(bond, new_active, old_active);
1da177e4 1183
58402054 1184 if (bond_is_lb(bond)) {
1da177e4 1185 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV
1186 if (old_active)
1187 bond_set_slave_inactive_flags(old_active);
1188 if (new_active)
1189 bond_set_slave_active_flags(new_active);
1da177e4
LT
1190 } else {
1191 bond->curr_active_slave = new_active;
1192 }
c3ade5ca
JV
1193
1194 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
3d632c3f 1195 if (old_active)
c3ade5ca 1196 bond_set_slave_inactive_flags(old_active);
c3ade5ca
JV
1197
1198 if (new_active) {
1199 bond_set_slave_active_flags(new_active);
2ab82852 1200
709f8a45
OG
1201 if (bond->params.fail_over_mac)
1202 bond_do_fail_over_mac(bond, new_active,
1203 old_active);
3915c1e8 1204
709f8a45 1205 bond->send_grat_arp = bond->params.num_grat_arp;
b59f9f74 1206 bond_send_gratuitous_arp(bond);
01f3109d 1207
305d552a
BH
1208 bond->send_unsol_na = bond->params.num_unsol_na;
1209 bond_send_unsolicited_na(bond);
1210
01f3109d
OG
1211 write_unlock_bh(&bond->curr_slave_lock);
1212 read_unlock(&bond->lock);
1213
1214 netdev_bonding_change(bond->dev);
1215
1216 read_lock(&bond->lock);
1217 write_lock_bh(&bond->curr_slave_lock);
7893b249 1218 }
c3ade5ca 1219 }
1da177e4
LT
1220}
1221
1222/**
1223 * bond_select_active_slave - select a new active slave, if needed
1224 * @bond: our bonding struct
1225 *
3d632c3f 1226 * This functions should be called when one of the following occurs:
1da177e4
LT
1227 * - The old curr_active_slave has been released or lost its link.
1228 * - The primary_slave has got its link back.
1229 * - A slave has got its link back and there's no old curr_active_slave.
1230 *
3915c1e8 1231 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1da177e4 1232 */
a77b5325 1233void bond_select_active_slave(struct bonding *bond)
1da177e4
LT
1234{
1235 struct slave *best_slave;
ff59c456 1236 int rv;
1da177e4
LT
1237
1238 best_slave = bond_find_best_slave(bond);
1239 if (best_slave != bond->curr_active_slave) {
1240 bond_change_active_slave(bond, best_slave);
ff59c456
JV
1241 rv = bond_set_carrier(bond);
1242 if (!rv)
1243 return;
1244
1245 if (netif_carrier_ok(bond->dev)) {
3d632c3f 1246 pr_info(DRV_NAME
ff59c456
JV
1247 ": %s: first active interface up!\n",
1248 bond->dev->name);
1249 } else {
3d632c3f 1250 pr_info(DRV_NAME ": %s: "
ff59c456
JV
1251 "now running without any active interface !\n",
1252 bond->dev->name);
1253 }
1da177e4
LT
1254 }
1255}
1256
1257/*--------------------------- slave list handling ---------------------------*/
1258
1259/*
1260 * This function attaches the slave to the end of list.
1261 *
1262 * bond->lock held for writing by caller.
1263 */
1264static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1265{
1266 if (bond->first_slave == NULL) { /* attaching the first slave */
1267 new_slave->next = new_slave;
1268 new_slave->prev = new_slave;
1269 bond->first_slave = new_slave;
1270 } else {
1271 new_slave->next = bond->first_slave;
1272 new_slave->prev = bond->first_slave->prev;
1273 new_slave->next->prev = new_slave;
1274 new_slave->prev->next = new_slave;
1275 }
1276
1277 bond->slave_cnt++;
1278}
1279
1280/*
1281 * This function detaches the slave from the list.
1282 * WARNING: no check is made to verify if the slave effectively
1283 * belongs to <bond>.
1284 * Nothing is freed on return, structures are just unchained.
1285 * If any slave pointer in bond was pointing to <slave>,
1286 * it should be changed by the calling function.
1287 *
1288 * bond->lock held for writing by caller.
1289 */
1290static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1291{
3d632c3f 1292 if (slave->next)
1da177e4 1293 slave->next->prev = slave->prev;
1da177e4 1294
3d632c3f 1295 if (slave->prev)
1da177e4 1296 slave->prev->next = slave->next;
1da177e4
LT
1297
1298 if (bond->first_slave == slave) { /* slave is the first slave */
1299 if (bond->slave_cnt > 1) { /* there are more slave */
1300 bond->first_slave = slave->next;
1301 } else {
1302 bond->first_slave = NULL; /* slave was the last one */
1303 }
1304 }
1305
1306 slave->next = NULL;
1307 slave->prev = NULL;
1308 bond->slave_cnt--;
1309}
1310
1311/*---------------------------------- IOCTL ----------------------------------*/
1312
4ad072c9
AB
1313static int bond_sethwaddr(struct net_device *bond_dev,
1314 struct net_device *slave_dev)
1da177e4 1315{
5a03cdb7
HE
1316 pr_debug("bond_dev=%p\n", bond_dev);
1317 pr_debug("slave_dev=%p\n", slave_dev);
1318 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1da177e4
LT
1319 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1320 return 0;
1321}
1322
7f353bf2
HX
1323#define BOND_VLAN_FEATURES \
1324 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1325 NETIF_F_HW_VLAN_FILTER)
8531c5ff 1326
3d632c3f 1327/*
8e3babcd 1328 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX
1329 * feature bits are managed elsewhere, so preserve those feature bits
1330 * on the master device.
8531c5ff
AK
1331 */
1332static int bond_compute_features(struct bonding *bond)
1333{
8531c5ff
AK
1334 struct slave *slave;
1335 struct net_device *bond_dev = bond->dev;
7f353bf2 1336 unsigned long features = bond_dev->features;
278339a4 1337 unsigned long vlan_features = 0;
3158bf7d
MS
1338 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1339 bond_dev->hard_header_len);
8e3babcd 1340 int i;
8531c5ff 1341
7f353bf2 1342 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
b63365a2
HX
1343 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1344
1345 if (!bond->first_slave)
1346 goto done;
1347
1348 features &= ~NETIF_F_ONE_FOR_ALL;
7f353bf2 1349
278339a4 1350 vlan_features = bond->first_slave->dev->vlan_features;
54ef3137 1351 bond_for_each_slave(bond, slave, i) {
b63365a2
HX
1352 features = netdev_increment_features(features,
1353 slave->dev->features,
1354 NETIF_F_ONE_FOR_ALL);
278339a4
JV
1355 vlan_features = netdev_increment_features(vlan_features,
1356 slave->dev->vlan_features,
1357 NETIF_F_ONE_FOR_ALL);
54ef3137
JV
1358 if (slave->dev->hard_header_len > max_hard_header_len)
1359 max_hard_header_len = slave->dev->hard_header_len;
1360 }
8531c5ff 1361
b63365a2 1362done:
7f353bf2 1363 features |= (bond_dev->features & BOND_VLAN_FEATURES);
b63365a2 1364 bond_dev->features = netdev_fix_features(features, NULL);
278339a4 1365 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
54ef3137 1366 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK
1367
1368 return 0;
1369}
1370
872254dd
MS
1371static void bond_setup_by_slave(struct net_device *bond_dev,
1372 struct net_device *slave_dev)
1373{
454d7c9b 1374 struct bonding *bond = netdev_priv(bond_dev);
d90a162a 1375
00829823 1376 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS
1377
1378 bond_dev->type = slave_dev->type;
1379 bond_dev->hard_header_len = slave_dev->hard_header_len;
1380 bond_dev->addr_len = slave_dev->addr_len;
1381
1382 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1383 slave_dev->addr_len);
d90a162a 1384 bond->setup_by_slave = 1;
872254dd
MS
1385}
1386
1da177e4 1387/* enslave device <slave> to bond device <master> */
a77b5325 1388int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1389{
454d7c9b 1390 struct bonding *bond = netdev_priv(bond_dev);
eb7cc59a 1391 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT
1392 struct slave *new_slave = NULL;
1393 struct dev_mc_list *dmi;
1394 struct sockaddr addr;
1395 int link_reporting;
1396 int old_features = bond_dev->features;
1397 int res = 0;
1398
552709d5 1399 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
eb7cc59a 1400 slave_ops->ndo_do_ioctl == NULL) {
3d632c3f 1401 pr_warning(DRV_NAME
4e0952c7
MW
1402 ": %s: Warning: no link monitoring support for %s\n",
1403 bond_dev->name, slave_dev->name);
1da177e4
LT
1404 }
1405
1406 /* bond must be initialized by bond_open() before enslaving */
1407 if (!(bond_dev->flags & IFF_UP)) {
3d632c3f 1408 pr_warning(DRV_NAME
6b1bf096
MS
1409 " %s: master_dev is not up in bond_enslave\n",
1410 bond_dev->name);
1da177e4
LT
1411 }
1412
1413 /* already enslaved */
1414 if (slave_dev->flags & IFF_SLAVE) {
5a03cdb7 1415 pr_debug("Error, Device was already enslaved\n");
1da177e4
LT
1416 return -EBUSY;
1417 }
1418
1419 /* vlan challenged mutual exclusion */
1420 /* no need to lock since we're protected by rtnl_lock */
1421 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 1422 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1da177e4 1423 if (!list_empty(&bond->vlan_list)) {
3d632c3f 1424 pr_err(DRV_NAME
4e0952c7 1425 ": %s: Error: cannot enslave VLAN "
1da177e4 1426 "challenged slave %s on VLAN enabled "
4e0952c7 1427 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT
1428 bond_dev->name);
1429 return -EPERM;
1430 } else {
3d632c3f 1431 pr_warning(DRV_NAME
4e0952c7 1432 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT
1433 "slave %s. Adding VLANs will be blocked as "
1434 "long as %s is part of bond %s\n",
4e0952c7 1435 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT
1436 bond_dev->name);
1437 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1438 }
1439 } else {
5a03cdb7 1440 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1da177e4
LT
1441 if (bond->slave_cnt == 0) {
1442 /* First slave, and it is not VLAN challenged,
1443 * so remove the block of adding VLANs over the bond.
1444 */
1445 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1446 }
1447 }
1448
217df670
JV
1449 /*
1450 * Old ifenslave binaries are no longer supported. These can
3d632c3f 1451 * be identified with moderate accuracy by the state of the slave:
217df670
JV
1452 * the current ifenslave will set the interface down prior to
1453 * enslaving it; the old ifenslave will not.
1454 */
1455 if ((slave_dev->flags & IFF_UP)) {
3d632c3f 1456 pr_err(DRV_NAME ": %s is up. "
217df670
JV
1457 "This may be due to an out of date ifenslave.\n",
1458 slave_dev->name);
1459 res = -EPERM;
1460 goto err_undo_flags;
1461 }
1da177e4 1462
872254dd
MS
1463 /* set bonding device ether type by slave - bonding netdevices are
1464 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1465 * there is a need to override some of the type dependent attribs/funcs.
1466 *
1467 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1468 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1469 */
1470 if (bond->slave_cnt == 0) {
e36b9d16
MS
1471 if (bond_dev->type != slave_dev->type) {
1472 dev_close(bond_dev);
1473 pr_debug("%s: change device type from %d to %d\n",
1474 bond_dev->name, bond_dev->type, slave_dev->type);
1475 if (slave_dev->type != ARPHRD_ETHER)
1476 bond_setup_by_slave(bond_dev, slave_dev);
1477 else
1478 ether_setup(bond_dev);
1479 dev_open(bond_dev);
1480 }
872254dd 1481 } else if (bond_dev->type != slave_dev->type) {
3d632c3f 1482 pr_err(DRV_NAME ": %s ether type (%d) is different "
872254dd
MS
1483 "from other slaves (%d), can not enslave it.\n",
1484 slave_dev->name,
1485 slave_dev->type, bond_dev->type);
1486 res = -EINVAL;
1487 goto err_undo_flags;
1488 }
1489
eb7cc59a 1490 if (slave_ops->ndo_set_mac_address == NULL) {
2ab82852 1491 if (bond->slave_cnt == 0) {
3d632c3f 1492 pr_warning(DRV_NAME
dd957c57
JV
1493 ": %s: Warning: The first slave device "
1494 "specified does not support setting the MAC "
3915c1e8 1495 "address. Setting fail_over_mac to active.",
dd957c57 1496 bond_dev->name);
3915c1e8
JV
1497 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1498 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
3d632c3f 1499 pr_err(DRV_NAME
dd957c57
JV
1500 ": %s: Error: The slave device specified "
1501 "does not support setting the MAC address, "
3915c1e8 1502 "but fail_over_mac is not set to active.\n"
2ab82852
MS
1503 , bond_dev->name);
1504 res = -EOPNOTSUPP;
1505 goto err_undo_flags;
1506 }
1da177e4
LT
1507 }
1508
243cb4e5 1509 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT
1510 if (!new_slave) {
1511 res = -ENOMEM;
1512 goto err_undo_flags;
1513 }
1514
1da177e4
LT
1515 /* save slave's original flags before calling
1516 * netdev_set_master and dev_open
1517 */
1518 new_slave->original_flags = slave_dev->flags;
1519
217df670
JV
1520 /*
1521 * Save slave's original ("permanent") mac address for modes
1522 * that need it, and for restoring it upon release, and then
1523 * set it to the master's address
1524 */
1525 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1526
dd957c57 1527 if (!bond->params.fail_over_mac) {
2ab82852
MS
1528 /*
1529 * Set slave to master's mac address. The application already
1530 * set the master's mac address to that of the first slave
1531 */
1532 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1533 addr.sa_family = slave_dev->type;
1534 res = dev_set_mac_address(slave_dev, &addr);
1535 if (res) {
5a03cdb7 1536 pr_debug("Error %d calling set_mac_address\n", res);
2ab82852
MS
1537 goto err_free;
1538 }
217df670 1539 }
1da177e4 1540
c2edacf8
JV
1541 res = netdev_set_master(slave_dev, bond_dev);
1542 if (res) {
5a03cdb7 1543 pr_debug("Error %d calling netdev_set_master\n", res);
569f0c4d 1544 goto err_restore_mac;
c2edacf8 1545 }
217df670
JV
1546 /* open the slave since the application closed it */
1547 res = dev_open(slave_dev);
1548 if (res) {
3d632c3f 1549 pr_debug("Opening slave %s failed\n", slave_dev->name);
569f0c4d 1550 goto err_unset_master;
1da177e4
LT
1551 }
1552
1da177e4 1553 new_slave->dev = slave_dev;
0b680e75 1554 slave_dev->priv_flags |= IFF_BONDING;
1da177e4 1555
58402054 1556 if (bond_is_lb(bond)) {
1da177e4
LT
1557 /* bond_alb_init_slave() must be called before all other stages since
1558 * it might fail and we do not want to have to undo everything
1559 */
1560 res = bond_alb_init_slave(bond, new_slave);
3d632c3f 1561 if (res)
569f0c4d 1562 goto err_close;
1da177e4
LT
1563 }
1564
1565 /* If the mode USES_PRIMARY, then the new slave gets the
1566 * master's promisc (and mc) settings only if it becomes the
1567 * curr_active_slave, and that is taken care of later when calling
1568 * bond_change_active()
1569 */
1570 if (!USES_PRIMARY(bond->params.mode)) {
1571 /* set promiscuity level to new slave */
1572 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC
1573 res = dev_set_promiscuity(slave_dev, 1);
1574 if (res)
1575 goto err_close;
1da177e4
LT
1576 }
1577
1578 /* set allmulti level to new slave */
1579 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC
1580 res = dev_set_allmulti(slave_dev, 1);
1581 if (res)
1582 goto err_close;
1da177e4
LT
1583 }
1584
b9e40857 1585 netif_addr_lock_bh(bond_dev);
1da177e4 1586 /* upload master's mc_list to new slave */
3d632c3f
SH
1587 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next)
1588 dev_mc_add(slave_dev, dmi->dmi_addr,
1589 dmi->dmi_addrlen, 0);
b9e40857 1590 netif_addr_unlock_bh(bond_dev);
1da177e4
LT
1591 }
1592
1593 if (bond->params.mode == BOND_MODE_8023AD) {
1594 /* add lacpdu mc addr to mc list */
1595 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1596
1597 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1598 }
1599
1600 bond_add_vlans_on_slave(bond, slave_dev);
1601
1602 write_lock_bh(&bond->lock);
1603
1604 bond_attach_slave(bond, new_slave);
1605
1606 new_slave->delay = 0;
1607 new_slave->link_failure_count = 0;
1608
8531c5ff
AK
1609 bond_compute_features(bond);
1610
3915c1e8
JV
1611 write_unlock_bh(&bond->lock);
1612
1613 read_lock(&bond->lock);
1614
f5b2b966
JV
1615 new_slave->last_arp_rx = jiffies;
1616
1da177e4
LT
1617 if (bond->params.miimon && !bond->params.use_carrier) {
1618 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1619
1620 if ((link_reporting == -1) && !bond->params.arp_interval) {
1621 /*
1622 * miimon is set but a bonded network driver
1623 * does not support ETHTOOL/MII and
1624 * arp_interval is not set. Note: if
1625 * use_carrier is enabled, we will never go
1626 * here (because netif_carrier is always
1627 * supported); thus, we don't need to change
1628 * the messages for netif_carrier.
1629 */
3d632c3f 1630 pr_warning(DRV_NAME
4e0952c7 1631 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT
1632 "available for interface %s, and "
1633 "arp_interval/arp_ip_target module parameters "
1634 "not specified, thus bonding will not detect "
1635 "link failures! see bonding.txt for details.\n",
4e0952c7 1636 bond_dev->name, slave_dev->name);
1da177e4
LT
1637 } else if (link_reporting == -1) {
1638 /* unable get link status using mii/ethtool */
3d632c3f 1639 pr_warning(DRV_NAME
4e0952c7 1640 ": %s: Warning: can't get link status from "
1da177e4
LT
1641 "interface %s; the network driver associated "
1642 "with this interface does not support MII or "
1643 "ETHTOOL link status reporting, thus miimon "
1644 "has no effect on this interface.\n",
4e0952c7 1645 bond_dev->name, slave_dev->name);
1da177e4
LT
1646 }
1647 }
1648
1649 /* check for initial state */
1650 if (!bond->params.miimon ||
1651 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1652 if (bond->params.updelay) {
5a03cdb7 1653 pr_debug("Initial state of slave_dev is "
1da177e4
LT
1654 "BOND_LINK_BACK\n");
1655 new_slave->link = BOND_LINK_BACK;
1656 new_slave->delay = bond->params.updelay;
1657 } else {
5a03cdb7 1658 pr_debug("Initial state of slave_dev is "
1da177e4
LT
1659 "BOND_LINK_UP\n");
1660 new_slave->link = BOND_LINK_UP;
1661 }
1662 new_slave->jiffies = jiffies;
1663 } else {
5a03cdb7 1664 pr_debug("Initial state of slave_dev is "
1da177e4
LT
1665 "BOND_LINK_DOWN\n");
1666 new_slave->link = BOND_LINK_DOWN;
1667 }
1668
1669 if (bond_update_speed_duplex(new_slave) &&
1670 (new_slave->link != BOND_LINK_DOWN)) {
3d632c3f 1671 pr_warning(DRV_NAME
4e0952c7 1672 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1673 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1674 bond_dev->name, new_slave->dev->name);
1da177e4
LT
1675
1676 if (bond->params.mode == BOND_MODE_8023AD) {
3d632c3f 1677 pr_warning(DRV_NAME
4e0952c7 1678 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1679 "support in base driver for proper aggregator "
4e0952c7 1680 "selection.\n", bond_dev->name);
1da177e4
LT
1681 }
1682 }
1683
1684 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1685 /* if there is a primary slave, remember it */
3d632c3f 1686 if (strcmp(bond->params.primary, new_slave->dev->name) == 0)
1da177e4 1687 bond->primary_slave = new_slave;
1da177e4
LT
1688 }
1689
3915c1e8
JV
1690 write_lock_bh(&bond->curr_slave_lock);
1691
1da177e4
LT
1692 switch (bond->params.mode) {
1693 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV
1694 bond_set_slave_inactive_flags(new_slave);
1695 bond_select_active_slave(bond);
1da177e4
LT
1696 break;
1697 case BOND_MODE_8023AD:
1698 /* in 802.3ad mode, the internal mechanism
1699 * will activate the slaves in the selected
1700 * aggregator
1701 */
1702 bond_set_slave_inactive_flags(new_slave);
1703 /* if this is the first slave */
1704 if (bond->slave_cnt == 1) {
1705 SLAVE_AD_INFO(new_slave).id = 1;
1706 /* Initialize AD with the number of times that the AD timer is called in 1 second
1707 * can be called only after the mac address of the bond is set
1708 */
1709 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1710 bond->params.lacp_fast);
1711 } else {
1712 SLAVE_AD_INFO(new_slave).id =
1713 SLAVE_AD_INFO(new_slave->prev).id + 1;
1714 }
1715
1716 bond_3ad_bind_slave(new_slave);
1717 break;
1718 case BOND_MODE_TLB:
1719 case BOND_MODE_ALB:
1720 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1721 bond_set_slave_inactive_flags(new_slave);
5a29f789 1722 bond_select_active_slave(bond);
1da177e4
LT
1723 break;
1724 default:
5a03cdb7 1725 pr_debug("This slave is always active in trunk mode\n");
1da177e4
LT
1726
1727 /* always active in trunk mode */
1728 new_slave->state = BOND_STATE_ACTIVE;
1729
1730 /* In trunking mode there is little meaning to curr_active_slave
1731 * anyway (it holds no special properties of the bond device),
1732 * so we can change it without calling change_active_interface()
1733 */
3d632c3f 1734 if (!bond->curr_active_slave)
1da177e4 1735 bond->curr_active_slave = new_slave;
3d632c3f 1736
1da177e4
LT
1737 break;
1738 } /* switch(bond_mode) */
1739
3915c1e8
JV
1740 write_unlock_bh(&bond->curr_slave_lock);
1741
ff59c456
JV
1742 bond_set_carrier(bond);
1743
3915c1e8 1744 read_unlock(&bond->lock);
1da177e4 1745
b76cdba9
MW
1746 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1747 if (res)
569f0c4d 1748 goto err_close;
b76cdba9 1749
3d632c3f 1750 pr_info(DRV_NAME
1da177e4
LT
1751 ": %s: enslaving %s as a%s interface with a%s link.\n",
1752 bond_dev->name, slave_dev->name,
1753 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1754 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1755
1756 /* enslave is successful */
1757 return 0;
1758
1759/* Undo stages on error */
1da177e4
LT
1760err_close:
1761 dev_close(slave_dev);
1762
569f0c4d
JV
1763err_unset_master:
1764 netdev_set_master(slave_dev, NULL);
1765
1da177e4 1766err_restore_mac:
dd957c57 1767 if (!bond->params.fail_over_mac) {
3915c1e8
JV
1768 /* XXX TODO - fom follow mode needs to change master's
1769 * MAC if this slave's MAC is in use by the bond, or at
1770 * least print a warning.
1771 */
2ab82852
MS
1772 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1773 addr.sa_family = slave_dev->type;
1774 dev_set_mac_address(slave_dev, &addr);
1775 }
1da177e4
LT
1776
1777err_free:
1778 kfree(new_slave);
1779
1780err_undo_flags:
1781 bond_dev->features = old_features;
3d632c3f 1782
1da177e4
LT
1783 return res;
1784}
1785
1786/*
1787 * Try to release the slave device <slave> from the bond device <master>
1788 * It is legal to access curr_active_slave without a lock because all the function
1789 * is write-locked.
1790 *
1791 * The rules for slave state should be:
1792 * for Active/Backup:
1793 * Active stays on all backups go down
1794 * for Bonded connections:
1795 * The first up interface should be left on and all others downed.
1796 */
a77b5325 1797int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1798{
454d7c9b 1799 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
1800 struct slave *slave, *oldcurrent;
1801 struct sockaddr addr;
1da177e4
LT
1802
1803 /* slave is not a slave or master is not master of this slave */
1804 if (!(slave_dev->flags & IFF_SLAVE) ||
1805 (slave_dev->master != bond_dev)) {
3d632c3f 1806 pr_err(DRV_NAME
4e0952c7 1807 ": %s: Error: cannot release %s.\n",
1da177e4
LT
1808 bond_dev->name, slave_dev->name);
1809 return -EINVAL;
1810 }
1811
1812 write_lock_bh(&bond->lock);
1813
1814 slave = bond_get_slave_by_dev(bond, slave_dev);
1815 if (!slave) {
1816 /* not a slave of this bond */
3d632c3f 1817 pr_info(DRV_NAME
1da177e4
LT
1818 ": %s: %s not enslaved\n",
1819 bond_dev->name, slave_dev->name);
f5e2a7b2 1820 write_unlock_bh(&bond->lock);
1da177e4
LT
1821 return -EINVAL;
1822 }
1823
3915c1e8 1824 if (!bond->params.fail_over_mac) {
89c76c62
SH
1825 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr)
1826 && bond->slave_cnt > 1)
3d632c3f 1827 pr_warning(DRV_NAME
3915c1e8 1828 ": %s: Warning: the permanent HWaddr of %s - "
e174961c 1829 "%pM - is still in use by %s. "
3915c1e8
JV
1830 "Set the HWaddr of %s to a different address "
1831 "to avoid conflicts.\n",
1832 bond_dev->name, slave_dev->name,
e174961c 1833 slave->perm_hwaddr,
3915c1e8 1834 bond_dev->name, slave_dev->name);
1da177e4
LT
1835 }
1836
1837 /* Inform AD package of unbinding of slave. */
1838 if (bond->params.mode == BOND_MODE_8023AD) {
1839 /* must be called before the slave is
1840 * detached from the list
1841 */
1842 bond_3ad_unbind_slave(slave);
1843 }
1844
3d632c3f 1845 pr_info(DRV_NAME
1da177e4
LT
1846 ": %s: releasing %s interface %s\n",
1847 bond_dev->name,
1848 (slave->state == BOND_STATE_ACTIVE)
1849 ? "active" : "backup",
1850 slave_dev->name);
1851
1852 oldcurrent = bond->curr_active_slave;
1853
1854 bond->current_arp_slave = NULL;
1855
1856 /* release the slave from its bond */
1857 bond_detach_slave(bond, slave);
1858
8531c5ff
AK
1859 bond_compute_features(bond);
1860
3d632c3f 1861 if (bond->primary_slave == slave)
1da177e4 1862 bond->primary_slave = NULL;
1da177e4 1863
3d632c3f 1864 if (oldcurrent == slave)
1da177e4 1865 bond_change_active_slave(bond, NULL);
1da177e4 1866
58402054 1867 if (bond_is_lb(bond)) {
1da177e4
LT
1868 /* Must be called only after the slave has been
1869 * detached from the list and the curr_active_slave
1870 * has been cleared (if our_slave == old_current),
1871 * but before a new active slave is selected.
1872 */
2543331d 1873 write_unlock_bh(&bond->lock);
1da177e4 1874 bond_alb_deinit_slave(bond, slave);
2543331d 1875 write_lock_bh(&bond->lock);
1da177e4
LT
1876 }
1877
059fe7a5
JV
1878 if (oldcurrent == slave) {
1879 /*
1880 * Note that we hold RTNL over this sequence, so there
1881 * is no concern that another slave add/remove event
1882 * will interfere.
1883 */
1884 write_unlock_bh(&bond->lock);
1885 read_lock(&bond->lock);
1886 write_lock_bh(&bond->curr_slave_lock);
1887
1da177e4
LT
1888 bond_select_active_slave(bond);
1889
059fe7a5
JV
1890 write_unlock_bh(&bond->curr_slave_lock);
1891 read_unlock(&bond->lock);
1892 write_lock_bh(&bond->lock);
1893 }
1894
1da177e4 1895 if (bond->slave_cnt == 0) {
ff59c456
JV
1896 bond_set_carrier(bond);
1897
1da177e4
LT
1898 /* if the last slave was removed, zero the mac address
1899 * of the master so it will be set by the application
1900 * to the mac address of the first slave
1901 */
1902 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1903
1904 if (list_empty(&bond->vlan_list)) {
1905 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1906 } else {
3d632c3f 1907 pr_warning(DRV_NAME
4e0952c7 1908 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1909 "still has VLANs.\n",
4e0952c7 1910 bond_dev->name, bond_dev->name);
3d632c3f 1911 pr_warning(DRV_NAME
4e0952c7
MW
1912 ": %s: When re-adding slaves, make sure the bond's "
1913 "HW address matches its VLANs'.\n",
1914 bond_dev->name);
1da177e4
LT
1915 }
1916 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1917 !bond_has_challenged_slaves(bond)) {
3d632c3f 1918 pr_info(DRV_NAME
4e0952c7 1919 ": %s: last VLAN challenged slave %s "
1da177e4 1920 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1921 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT
1922 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1923 }
1924
1925 write_unlock_bh(&bond->lock);
1926
b76cdba9
MW
1927 /* must do this from outside any spinlocks */
1928 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1929
1da177e4
LT
1930 bond_del_vlans_from_slave(bond, slave_dev);
1931
1932 /* If the mode USES_PRIMARY, then we should only remove its
1933 * promisc and mc settings if it was the curr_active_slave, but that was
1934 * already taken care of above when we detached the slave
1935 */
1936 if (!USES_PRIMARY(bond->params.mode)) {
1937 /* unset promiscuity level from slave */
3d632c3f 1938 if (bond_dev->flags & IFF_PROMISC)
1da177e4 1939 dev_set_promiscuity(slave_dev, -1);
1da177e4
LT
1940
1941 /* unset allmulti level from slave */
3d632c3f 1942 if (bond_dev->flags & IFF_ALLMULTI)
1da177e4 1943 dev_set_allmulti(slave_dev, -1);
1da177e4
LT
1944
1945 /* flush master's mc_list from slave */
b9e40857 1946 netif_addr_lock_bh(bond_dev);
1da177e4 1947 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 1948 netif_addr_unlock_bh(bond_dev);
1da177e4
LT
1949 }
1950
1951 netdev_set_master(slave_dev, NULL);
1952
1953 /* close slave before restoring its mac address */
1954 dev_close(slave_dev);
1955
3915c1e8 1956 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852
MS
1957 /* restore original ("permanent") mac address */
1958 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1959 addr.sa_family = slave_dev->type;
1960 dev_set_mac_address(slave_dev, &addr);
1961 }
1da177e4 1962
8f903c70 1963 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV
1964 IFF_SLAVE_INACTIVE | IFF_BONDING |
1965 IFF_SLAVE_NEEDARP);
1da177e4
LT
1966
1967 kfree(slave);
1968
1969 return 0; /* deletion OK */
1970}
1971
d90a162a
MS
1972/*
1973* Destroy a bonding device.
1974* Must be under rtnl_lock when this function is called.
1975*/
9e71626c 1976static void bond_uninit(struct net_device *bond_dev)
a434e43f 1977{
244ef9b9 1978 struct bonding *bond = netdev_priv(bond_dev);
a434e43f 1979
9e71626c
SH
1980 bond_deinit(bond_dev);
1981 bond_destroy_sysfs_entry(bond);
1982
a434e43f
JV
1983 if (bond->wq)
1984 destroy_workqueue(bond->wq);
1985
1986 netif_addr_lock_bh(bond_dev);
1987 bond_mc_list_destroy(bond);
1988 netif_addr_unlock_bh(bond_dev);
a434e43f
JV
1989}
1990
d90a162a 1991/*
3d632c3f 1992* First release a slave and than destroy the bond if no more slaves are left.
d90a162a
MS
1993* Must be under rtnl_lock when this function is called.
1994*/
3d632c3f
SH
1995int bond_release_and_destroy(struct net_device *bond_dev,
1996 struct net_device *slave_dev)
d90a162a 1997{
454d7c9b 1998 struct bonding *bond = netdev_priv(bond_dev);
d90a162a
MS
1999 int ret;
2000
2001 ret = bond_release(bond_dev, slave_dev);
2002 if ((ret == 0) && (bond->slave_cnt == 0)) {
3d632c3f 2003 pr_info(DRV_NAME ": %s: destroying bond %s.\n",
d90a162a 2004 bond_dev->name, bond_dev->name);
9e71626c 2005 unregister_netdevice(bond_dev);
d90a162a
MS
2006 }
2007 return ret;
2008}
2009
1da177e4
LT
2010/*
2011 * This function releases all slaves.
2012 */
2013static int bond_release_all(struct net_device *bond_dev)
2014{
454d7c9b 2015 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
2016 struct slave *slave;
2017 struct net_device *slave_dev;
2018 struct sockaddr addr;
2019
2020 write_lock_bh(&bond->lock);
2021
ff59c456
JV
2022 netif_carrier_off(bond_dev);
2023
3d632c3f 2024 if (bond->slave_cnt == 0)
1da177e4 2025 goto out;
1da177e4
LT
2026
2027 bond->current_arp_slave = NULL;
2028 bond->primary_slave = NULL;
2029 bond_change_active_slave(bond, NULL);
2030
2031 while ((slave = bond->first_slave) != NULL) {
2032 /* Inform AD package of unbinding of slave
2033 * before slave is detached from the list.
2034 */
3d632c3f 2035 if (bond->params.mode == BOND_MODE_8023AD)
1da177e4 2036 bond_3ad_unbind_slave(slave);
1da177e4
LT
2037
2038 slave_dev = slave->dev;
2039 bond_detach_slave(bond, slave);
2040
2543331d
JV
2041 /* now that the slave is detached, unlock and perform
2042 * all the undo steps that should not be called from
2043 * within a lock.
2044 */
2045 write_unlock_bh(&bond->lock);
2046
58402054 2047 if (bond_is_lb(bond)) {
1da177e4
LT
2048 /* must be called only after the slave
2049 * has been detached from the list
2050 */
2051 bond_alb_deinit_slave(bond, slave);
2052 }
2053
8531c5ff
AK
2054 bond_compute_features(bond);
2055
b76cdba9 2056 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT
2057 bond_del_vlans_from_slave(bond, slave_dev);
2058
2059 /* If the mode USES_PRIMARY, then we should only remove its
2060 * promisc and mc settings if it was the curr_active_slave, but that was
2061 * already taken care of above when we detached the slave
2062 */
2063 if (!USES_PRIMARY(bond->params.mode)) {
2064 /* unset promiscuity level from slave */
3d632c3f 2065 if (bond_dev->flags & IFF_PROMISC)
1da177e4 2066 dev_set_promiscuity(slave_dev, -1);
1da177e4
LT
2067
2068 /* unset allmulti level from slave */
3d632c3f 2069 if (bond_dev->flags & IFF_ALLMULTI)
1da177e4 2070 dev_set_allmulti(slave_dev, -1);
1da177e4
LT
2071
2072 /* flush master's mc_list from slave */
b9e40857 2073 netif_addr_lock_bh(bond_dev);
1da177e4 2074 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2075 netif_addr_unlock_bh(bond_dev);
1da177e4
LT
2076 }
2077
2078 netdev_set_master(slave_dev, NULL);
2079
2080 /* close slave before restoring its mac address */
2081 dev_close(slave_dev);
2082
dd957c57 2083 if (!bond->params.fail_over_mac) {
2ab82852
MS
2084 /* restore original ("permanent") mac address*/
2085 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2086 addr.sa_family = slave_dev->type;
2087 dev_set_mac_address(slave_dev, &addr);
2088 }
1da177e4 2089
8f903c70
JV
2090 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2091 IFF_SLAVE_INACTIVE);
1da177e4
LT
2092
2093 kfree(slave);
2094
2095 /* re-acquire the lock before getting the next slave */
2096 write_lock_bh(&bond->lock);
2097 }
2098
2099 /* zero the mac address of the master so it will be
2100 * set by the application to the mac address of the
2101 * first slave
2102 */
2103 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2104
3d632c3f 2105 if (list_empty(&bond->vlan_list))
1da177e4 2106 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
3d632c3f
SH
2107 else {
2108 pr_warning(DRV_NAME
4e0952c7 2109 ": %s: Warning: clearing HW address of %s while it "
1da177e4 2110 "still has VLANs.\n",
4e0952c7 2111 bond_dev->name, bond_dev->name);
3d632c3f 2112 pr_warning(DRV_NAME
4e0952c7
MW
2113 ": %s: When re-adding slaves, make sure the bond's "
2114 "HW address matches its VLANs'.\n",
2115 bond_dev->name);
1da177e4
LT
2116 }
2117
3d632c3f 2118 pr_info(DRV_NAME
1da177e4
LT
2119 ": %s: released all slaves\n",
2120 bond_dev->name);
2121
2122out:
2123 write_unlock_bh(&bond->lock);
2124
2125 return 0;
2126}
2127
2128/*
2129 * This function changes the active slave to slave <slave_dev>.
2130 * It returns -EINVAL in the following cases.
2131 * - <slave_dev> is not found in the list.
2132 * - There is not active slave now.
2133 * - <slave_dev> is already active.
2134 * - The link state of <slave_dev> is not BOND_LINK_UP.
2135 * - <slave_dev> is not running.
3d632c3f
SH
2136 * In these cases, this function does nothing.
2137 * In the other cases, current_slave pointer is changed and 0 is returned.
1da177e4
LT
2138 */
2139static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2140{
454d7c9b 2141 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
2142 struct slave *old_active = NULL;
2143 struct slave *new_active = NULL;
2144 int res = 0;
2145
3d632c3f 2146 if (!USES_PRIMARY(bond->params.mode))
1da177e4 2147 return -EINVAL;
1da177e4
LT
2148
2149 /* Verify that master_dev is indeed the master of slave_dev */
3d632c3f 2150 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
1da177e4 2151 return -EINVAL;
1da177e4 2152
059fe7a5 2153 read_lock(&bond->lock);
1da177e4 2154
059fe7a5 2155 read_lock(&bond->curr_slave_lock);
1da177e4 2156 old_active = bond->curr_active_slave;
059fe7a5
JV
2157 read_unlock(&bond->curr_slave_lock);
2158
1da177e4
LT
2159 new_active = bond_get_slave_by_dev(bond, slave_dev);
2160
2161 /*
2162 * Changing to the current active: do nothing; return success.
2163 */
2164 if (new_active && (new_active == old_active)) {
059fe7a5 2165 read_unlock(&bond->lock);
1da177e4
LT
2166 return 0;
2167 }
2168
2169 if ((new_active) &&
2170 (old_active) &&
2171 (new_active->link == BOND_LINK_UP) &&
2172 IS_UP(new_active->dev)) {
059fe7a5 2173 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2174 bond_change_active_slave(bond, new_active);
059fe7a5 2175 write_unlock_bh(&bond->curr_slave_lock);
3d632c3f 2176 } else
1da177e4 2177 res = -EINVAL;
1da177e4 2178
059fe7a5 2179 read_unlock(&bond->lock);
1da177e4
LT
2180
2181 return res;
2182}
2183
1da177e4
LT
2184static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2185{
454d7c9b 2186 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
2187
2188 info->bond_mode = bond->params.mode;
2189 info->miimon = bond->params.miimon;
2190
6603a6f2 2191 read_lock(&bond->lock);
1da177e4 2192 info->num_slaves = bond->slave_cnt;
6603a6f2 2193 read_unlock(&bond->lock);
1da177e4
LT
2194
2195 return 0;
2196}
2197
2198static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2199{
454d7c9b 2200 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 2201 struct slave *slave;
689c96cc 2202 int i, res = -ENODEV;
1da177e4 2203
6603a6f2 2204 read_lock(&bond->lock);
1da177e4
LT
2205
2206 bond_for_each_slave(bond, slave, i) {
2207 if (i == (int)info->slave_id) {
689c96cc
ED
2208 res = 0;
2209 strcpy(info->slave_name, slave->dev->name);
2210 info->link = slave->link;
2211 info->state = slave->state;
2212 info->link_failure_count = slave->link_failure_count;
1da177e4
LT
2213 break;
2214 }
2215 }
2216
6603a6f2 2217 read_unlock(&bond->lock);
1da177e4 2218
689c96cc 2219 return res;
1da177e4
LT
2220}
2221
2222/*-------------------------------- Monitoring -------------------------------*/
2223
1da177e4 2224
f0c76d61
JV
2225static int bond_miimon_inspect(struct bonding *bond)
2226{
2227 struct slave *slave;
2228 int i, link_state, commit = 0;
41f89100
JP
2229 bool ignore_updelay;
2230
2231 ignore_updelay = !bond->curr_active_slave ? true : false;
1da177e4
LT
2232
2233 bond_for_each_slave(bond, slave, i) {
f0c76d61 2234 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2235
f0c76d61 2236 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT
2237
2238 switch (slave->link) {
f0c76d61
JV
2239 case BOND_LINK_UP:
2240 if (link_state)
2241 continue;
1da177e4 2242
f0c76d61
JV
2243 slave->link = BOND_LINK_FAIL;
2244 slave->delay = bond->params.downdelay;
2245 if (slave->delay) {
3d632c3f 2246 pr_info(DRV_NAME
f0c76d61
JV
2247 ": %s: link status down for %s"
2248 "interface %s, disabling it in %d ms.\n",
2249 bond->dev->name,
2250 (bond->params.mode ==
2251 BOND_MODE_ACTIVEBACKUP) ?
2252 ((slave->state == BOND_STATE_ACTIVE) ?
2253 "active " : "backup ") : "",
2254 slave->dev->name,
2255 bond->params.downdelay * bond->params.miimon);
1da177e4 2256 }
f0c76d61
JV
2257 /*FALLTHRU*/
2258 case BOND_LINK_FAIL:
2259 if (link_state) {
2260 /*
2261 * recovered before downdelay expired
2262 */
2263 slave->link = BOND_LINK_UP;
1da177e4 2264 slave->jiffies = jiffies;
3d632c3f 2265 pr_info(DRV_NAME
1da177e4
LT
2266 ": %s: link status up again after %d "
2267 "ms for interface %s.\n",
1b76b316 2268 bond->dev->name,
f0c76d61
JV
2269 (bond->params.downdelay - slave->delay) *
2270 bond->params.miimon,
2271 slave->dev->name);
2272 continue;
1da177e4 2273 }
f0c76d61
JV
2274
2275 if (slave->delay <= 0) {
2276 slave->new_link = BOND_LINK_DOWN;
2277 commit++;
2278 continue;
1da177e4 2279 }
1da177e4 2280
f0c76d61
JV
2281 slave->delay--;
2282 break;
2283
2284 case BOND_LINK_DOWN:
2285 if (!link_state)
2286 continue;
2287
2288 slave->link = BOND_LINK_BACK;
2289 slave->delay = bond->params.updelay;
2290
2291 if (slave->delay) {
3d632c3f 2292 pr_info(DRV_NAME
f0c76d61
JV
2293 ": %s: link status up for "
2294 "interface %s, enabling it in %d ms.\n",
2295 bond->dev->name, slave->dev->name,
41f89100 2296 ignore_updelay ? 0 :
f0c76d61
JV
2297 bond->params.updelay *
2298 bond->params.miimon);
2299 }
2300 /*FALLTHRU*/
2301 case BOND_LINK_BACK:
2302 if (!link_state) {
2303 slave->link = BOND_LINK_DOWN;
3d632c3f 2304 pr_info(DRV_NAME
1da177e4
LT
2305 ": %s: link status down again after %d "
2306 "ms for interface %s.\n",
1b76b316 2307 bond->dev->name,
f0c76d61
JV
2308 (bond->params.updelay - slave->delay) *
2309 bond->params.miimon,
2310 slave->dev->name);
2311
2312 continue;
2313 }
2314
41f89100
JP
2315 if (ignore_updelay)
2316 slave->delay = 0;
2317
f0c76d61
JV
2318 if (slave->delay <= 0) {
2319 slave->new_link = BOND_LINK_UP;
2320 commit++;
41f89100 2321 ignore_updelay = false;
f0c76d61 2322 continue;
1da177e4 2323 }
f0c76d61
JV
2324
2325 slave->delay--;
1da177e4 2326 break;
f0c76d61
JV
2327 }
2328 }
1da177e4 2329
f0c76d61
JV
2330 return commit;
2331}
1da177e4 2332
f0c76d61
JV
2333static void bond_miimon_commit(struct bonding *bond)
2334{
2335 struct slave *slave;
2336 int i;
2337
2338 bond_for_each_slave(bond, slave, i) {
2339 switch (slave->new_link) {
2340 case BOND_LINK_NOCHANGE:
2341 continue;
1da177e4 2342
f0c76d61
JV
2343 case BOND_LINK_UP:
2344 slave->link = BOND_LINK_UP;
2345 slave->jiffies = jiffies;
2346
2347 if (bond->params.mode == BOND_MODE_8023AD) {
2348 /* prevent it from being the active one */
2349 slave->state = BOND_STATE_BACKUP;
2350 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2351 /* make it immediately active */
2352 slave->state = BOND_STATE_ACTIVE;
2353 } else if (slave != bond->primary_slave) {
2354 /* prevent it from being the active one */
2355 slave->state = BOND_STATE_BACKUP;
1da177e4 2356 }
1da177e4 2357
3d632c3f 2358 pr_info(DRV_NAME
f0c76d61
JV
2359 ": %s: link status definitely "
2360 "up for interface %s.\n",
2361 bond->dev->name, slave->dev->name);
1da177e4 2362
f0c76d61
JV
2363 /* notify ad that the link status has changed */
2364 if (bond->params.mode == BOND_MODE_8023AD)
2365 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2366
58402054 2367 if (bond_is_lb(bond))
f0c76d61
JV
2368 bond_alb_handle_link_change(bond, slave,
2369 BOND_LINK_UP);
1da177e4 2370
f0c76d61
JV
2371 if (!bond->curr_active_slave ||
2372 (slave == bond->primary_slave))
2373 goto do_failover;
1da177e4 2374
f0c76d61 2375 continue;
059fe7a5 2376
f0c76d61 2377 case BOND_LINK_DOWN:
fba4acda
JV
2378 if (slave->link_failure_count < UINT_MAX)
2379 slave->link_failure_count++;
2380
f0c76d61 2381 slave->link = BOND_LINK_DOWN;
1da177e4 2382
f0c76d61
JV
2383 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2384 bond->params.mode == BOND_MODE_8023AD)
2385 bond_set_slave_inactive_flags(slave);
2386
3d632c3f 2387 pr_info(DRV_NAME
f0c76d61
JV
2388 ": %s: link status definitely down for "
2389 "interface %s, disabling it\n",
2390 bond->dev->name, slave->dev->name);
2391
2392 if (bond->params.mode == BOND_MODE_8023AD)
2393 bond_3ad_handle_link_change(slave,
2394 BOND_LINK_DOWN);
2395
ae63e808 2396 if (bond_is_lb(bond))
f0c76d61
JV
2397 bond_alb_handle_link_change(bond, slave,
2398 BOND_LINK_DOWN);
2399
2400 if (slave == bond->curr_active_slave)
2401 goto do_failover;
2402
2403 continue;
2404
2405 default:
3d632c3f 2406 pr_err(DRV_NAME
f0c76d61
JV
2407 ": %s: invalid new link %d on slave %s\n",
2408 bond->dev->name, slave->new_link,
2409 slave->dev->name);
2410 slave->new_link = BOND_LINK_NOCHANGE;
2411
2412 continue;
2413 }
2414
2415do_failover:
2416 ASSERT_RTNL();
2417 write_lock_bh(&bond->curr_slave_lock);
2418 bond_select_active_slave(bond);
2419 write_unlock_bh(&bond->curr_slave_lock);
2420 }
2421
2422 bond_set_carrier(bond);
1da177e4
LT
2423}
2424
0b0eef66
JV
2425/*
2426 * bond_mii_monitor
2427 *
2428 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV
2429 * inspection, then (if inspection indicates something needs to be done)
2430 * an acquisition of appropriate locks followed by a commit phase to
2431 * implement whatever link state changes are indicated.
0b0eef66
JV
2432 */
2433void bond_mii_monitor(struct work_struct *work)
2434{
2435 struct bonding *bond = container_of(work, struct bonding,
2436 mii_work.work);
0b0eef66
JV
2437
2438 read_lock(&bond->lock);
f0c76d61
JV
2439 if (bond->kill_timers)
2440 goto out;
2441
2442 if (bond->slave_cnt == 0)
2443 goto re_arm;
b59f9f74
JV
2444
2445 if (bond->send_grat_arp) {
2446 read_lock(&bond->curr_slave_lock);
2447 bond_send_gratuitous_arp(bond);
2448 read_unlock(&bond->curr_slave_lock);
2449 }
2450
305d552a
BH
2451 if (bond->send_unsol_na) {
2452 read_lock(&bond->curr_slave_lock);
2453 bond_send_unsolicited_na(bond);
2454 read_unlock(&bond->curr_slave_lock);
2455 }
2456
f0c76d61 2457 if (bond_miimon_inspect(bond)) {
0b0eef66
JV
2458 read_unlock(&bond->lock);
2459 rtnl_lock();
2460 read_lock(&bond->lock);
f0c76d61
JV
2461
2462 bond_miimon_commit(bond);
2463
5655662d
JV
2464 read_unlock(&bond->lock);
2465 rtnl_unlock(); /* might sleep, hold no other locks */
2466 read_lock(&bond->lock);
0b0eef66
JV
2467 }
2468
f0c76d61
JV
2469re_arm:
2470 if (bond->params.miimon)
2471 queue_delayed_work(bond->wq, &bond->mii_work,
2472 msecs_to_jiffies(bond->params.miimon));
2473out:
0b0eef66 2474 read_unlock(&bond->lock);
0b0eef66 2475}
c3ade5ca 2476
d3bb52b0 2477static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV
2478{
2479 struct in_device *idev;
2480 struct in_ifaddr *ifa;
a144ea4b 2481 __be32 addr = 0;
c3ade5ca
JV
2482
2483 if (!dev)
2484 return 0;
2485
2486 rcu_read_lock();
e5ed6399 2487 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV
2488 if (!idev)
2489 goto out;
2490
2491 ifa = idev->ifa_list;
2492 if (!ifa)
2493 goto out;
2494
2495 addr = ifa->ifa_local;
2496out:
2497 rcu_read_unlock();
2498 return addr;
2499}
2500
d3bb52b0 2501static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2502{
0883beca 2503 struct vlan_entry *vlan;
f5b2b966
JV
2504
2505 if (ip == bond->master_ip)
2506 return 1;
2507
0883beca 2508 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f5b2b966
JV
2509 if (ip == vlan->vlan_ip)
2510 return 1;
2511 }
2512
2513 return 0;
2514}
2515
c3ade5ca
JV
2516/*
2517 * We go to the (large) trouble of VLAN tagging ARP frames because
2518 * switches in VLAN mode (especially if ports are configured as
2519 * "native" to a VLAN) might not pass non-tagged frames.
2520 */
d3bb52b0 2521static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV
2522{
2523 struct sk_buff *skb;
2524
5a03cdb7 2525 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
c3ade5ca 2526 slave_dev->name, dest_ip, src_ip, vlan_id);
3d632c3f 2527
c3ade5ca
JV
2528 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2529 NULL, slave_dev->dev_addr, NULL);
2530
2531 if (!skb) {
3d632c3f 2532 pr_err(DRV_NAME ": ARP packet allocation failed\n");
c3ade5ca
JV
2533 return;
2534 }
2535 if (vlan_id) {
2536 skb = vlan_put_tag(skb, vlan_id);
2537 if (!skb) {
3d632c3f 2538 pr_err(DRV_NAME ": failed to insert VLAN tag\n");
c3ade5ca
JV
2539 return;
2540 }
2541 }
2542 arp_xmit(skb);
2543}
2544
2545
1da177e4
LT
2546static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2547{
c3ade5ca 2548 int i, vlan_id, rv;
d3bb52b0 2549 __be32 *targets = bond->params.arp_targets;
0883beca 2550 struct vlan_entry *vlan;
c3ade5ca
JV
2551 struct net_device *vlan_dev;
2552 struct flowi fl;
2553 struct rtable *rt;
1da177e4 2554
6b780567
MW
2555 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2556 if (!targets[i])
5a31bec0 2557 break;
5a03cdb7 2558 pr_debug("basa: target %x\n", targets[i]);
c3ade5ca 2559 if (list_empty(&bond->vlan_list)) {
5a03cdb7 2560 pr_debug("basa: empty vlan: arp_send\n");
c3ade5ca
JV
2561 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2562 bond->master_ip, 0);
2563 continue;
2564 }
2565
2566 /*
2567 * If VLANs are configured, we do a route lookup to
2568 * determine which VLAN interface would be used, so we
2569 * can tag the ARP with the proper VLAN tag.
2570 */
2571 memset(&fl, 0, sizeof(fl));
2572 fl.fl4_dst = targets[i];
2573 fl.fl4_tos = RTO_ONLINK;
2574
f206351a 2575 rv = ip_route_output_key(&init_net, &rt, &fl);
c3ade5ca
JV
2576 if (rv) {
2577 if (net_ratelimit()) {
3d632c3f 2578 pr_warning(DRV_NAME
63779436
HH
2579 ": %s: no route to arp_ip_target %pI4\n",
2580 bond->dev->name, &fl.fl4_dst);
c3ade5ca
JV
2581 }
2582 continue;
2583 }
2584
2585 /*
2586 * This target is not on a VLAN
2587 */
2588 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2589 ip_rt_put(rt);
5a03cdb7 2590 pr_debug("basa: rtdev == bond->dev: arp_send\n");
c3ade5ca
JV
2591 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2592 bond->master_ip, 0);
2593 continue;
2594 }
2595
2596 vlan_id = 0;
0883beca 2597 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2598 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV
2599 if (vlan_dev == rt->u.dst.dev) {
2600 vlan_id = vlan->vlan_id;
5a03cdb7 2601 pr_debug("basa: vlan match on %s %d\n",
c3ade5ca
JV
2602 vlan_dev->name, vlan_id);
2603 break;
2604 }
2605 }
2606
2607 if (vlan_id) {
ed4b9f80 2608 ip_rt_put(rt);
c3ade5ca
JV
2609 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2610 vlan->vlan_ip, vlan_id);
2611 continue;
2612 }
2613
2614 if (net_ratelimit()) {
3d632c3f 2615 pr_warning(DRV_NAME
63779436
HH
2616 ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2617 bond->dev->name, &fl.fl4_dst,
c3ade5ca
JV
2618 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2619 }
ed4b9f80 2620 ip_rt_put(rt);
c3ade5ca
JV
2621 }
2622}
2623
2624/*
2625 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2626 * for each VLAN above us.
b59f9f74
JV
2627 *
2628 * Caller must hold curr_slave_lock for read or better
c3ade5ca
JV
2629 */
2630static void bond_send_gratuitous_arp(struct bonding *bond)
2631{
2632 struct slave *slave = bond->curr_active_slave;
2633 struct vlan_entry *vlan;
2634 struct net_device *vlan_dev;
2635
5a03cdb7 2636 pr_debug("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
c3ade5ca 2637 slave ? slave->dev->name : "NULL");
b59f9f74
JV
2638
2639 if (!slave || !bond->send_grat_arp ||
2640 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
c3ade5ca
JV
2641 return;
2642
b59f9f74
JV
2643 bond->send_grat_arp--;
2644
c3ade5ca
JV
2645 if (bond->master_ip) {
2646 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2647 bond->master_ip, 0);
c3ade5ca
JV
2648 }
2649
2650 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2651 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV
2652 if (vlan->vlan_ip) {
2653 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2654 vlan->vlan_ip, vlan->vlan_id);
2655 }
1da177e4
LT
2656 }
2657}
2658
d3bb52b0 2659static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV
2660{
2661 int i;
d3bb52b0 2662 __be32 *targets = bond->params.arp_targets;
f5b2b966 2663
f5b2b966 2664 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
5a03cdb7 2665 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
63779436 2666 &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip));
f5b2b966
JV
2667 if (sip == targets[i]) {
2668 if (bond_has_this_ip(bond, tip))
2669 slave->last_arp_rx = jiffies;
2670 return;
2671 }
2672 }
2673}
2674
2675static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2676{
2677 struct arphdr *arp;
2678 struct slave *slave;
2679 struct bonding *bond;
2680 unsigned char *arp_ptr;
d3bb52b0 2681 __be32 sip, tip;
f5b2b966 2682
c346dca1 2683 if (dev_net(dev) != &init_net)
e730c155
EB
2684 goto out;
2685
f5b2b966
JV
2686 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2687 goto out;
2688
454d7c9b 2689 bond = netdev_priv(dev);
f5b2b966
JV
2690 read_lock(&bond->lock);
2691
5a03cdb7 2692 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
f5b2b966
JV
2693 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2694 orig_dev ? orig_dev->name : "NULL");
2695
2696 slave = bond_get_slave_by_dev(bond, orig_dev);
2697 if (!slave || !slave_do_arp_validate(bond, slave))
2698 goto out_unlock;
2699
988b7050 2700 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
f5b2b966
JV
2701 goto out_unlock;
2702
d0a92be0 2703 arp = arp_hdr(skb);
f5b2b966
JV
2704 if (arp->ar_hln != dev->addr_len ||
2705 skb->pkt_type == PACKET_OTHERHOST ||
2706 skb->pkt_type == PACKET_LOOPBACK ||
2707 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2708 arp->ar_pro != htons(ETH_P_IP) ||
2709 arp->ar_pln != 4)
2710 goto out_unlock;
2711
2712 arp_ptr = (unsigned char *)(arp + 1);
2713 arp_ptr += dev->addr_len;
2714 memcpy(&sip, arp_ptr, 4);
2715 arp_ptr += 4 + dev->addr_len;
2716 memcpy(&tip, arp_ptr, 4);
2717
5a03cdb7 2718 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
63779436
HH
2719 bond->dev->name, slave->dev->name, slave->state,
2720 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2721 &sip, &tip);
f5b2b966
JV
2722
2723 /*
2724 * Backup slaves won't see the ARP reply, but do come through
2725 * here for each ARP probe (so we swap the sip/tip to validate
2726 * the probe). In a "redundant switch, common router" type of
2727 * configuration, the ARP probe will (hopefully) travel from
2728 * the active, through one switch, the router, then the other
2729 * switch before reaching the backup.
2730 */
2731 if (slave->state == BOND_STATE_ACTIVE)
2732 bond_validate_arp(bond, slave, sip, tip);
2733 else
2734 bond_validate_arp(bond, slave, tip, sip);
2735
2736out_unlock:
2737 read_unlock(&bond->lock);
2738out:
2739 dev_kfree_skb(skb);
2740 return NET_RX_SUCCESS;
2741}
2742
1da177e4
LT
2743/*
2744 * this function is called regularly to monitor each slave's link
2745 * ensuring that traffic is being sent and received when arp monitoring
2746 * is used in load-balancing mode. if the adapter has been dormant, then an
2747 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2748 * arp monitoring in active backup mode.
2749 */
1b76b316 2750void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2751{
1b76b316
JV
2752 struct bonding *bond = container_of(work, struct bonding,
2753 arp_work.work);
1da177e4
LT
2754 struct slave *slave, *oldcurrent;
2755 int do_failover = 0;
2756 int delta_in_ticks;
2757 int i;
2758
2759 read_lock(&bond->lock);
2760
5ce0da8f 2761 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 2762
3d632c3f 2763 if (bond->kill_timers)
1da177e4 2764 goto out;
1da177e4 2765
3d632c3f 2766 if (bond->slave_cnt == 0)
1da177e4 2767 goto re_arm;
1da177e4
LT
2768
2769 read_lock(&bond->curr_slave_lock);
2770 oldcurrent = bond->curr_active_slave;
2771 read_unlock(&bond->curr_slave_lock);
2772
2773 /* see if any of the previous devices are up now (i.e. they have
2774 * xmt and rcv traffic). the curr_active_slave does not come into
2775 * the picture unless it is null. also, slave->jiffies is not needed
2776 * here because we send an arp on each slave and give a slave as
2777 * long as it needs to get the tx/rx within the delta.
2778 * TODO: what about up/down delay in arp mode? it wasn't here before
2779 * so it can wait
2780 */
2781 bond_for_each_slave(bond, slave, i) {
2782 if (slave->link != BOND_LINK_UP) {
9d21493b 2783 if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) &&
b63bb739 2784 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT
2785
2786 slave->link = BOND_LINK_UP;
2787 slave->state = BOND_STATE_ACTIVE;
2788
2789 /* primary_slave has no meaning in round-robin
2790 * mode. the window of a slave being up and
2791 * curr_active_slave being null after enslaving
2792 * is closed.
2793 */
2794 if (!oldcurrent) {
3d632c3f 2795 pr_info(DRV_NAME
1da177e4
LT
2796 ": %s: link status definitely "
2797 "up for interface %s, ",
1b76b316 2798 bond->dev->name,
1da177e4
LT
2799 slave->dev->name);
2800 do_failover = 1;
2801 } else {
3d632c3f 2802 pr_info(DRV_NAME
1da177e4 2803 ": %s: interface %s is now up\n",
1b76b316 2804 bond->dev->name,
1da177e4
LT
2805 slave->dev->name);
2806 }
2807 }
2808 } else {
2809 /* slave->link == BOND_LINK_UP */
2810
2811 /* not all switches will respond to an arp request
2812 * when the source ip is 0, so don't take the link down
2813 * if we don't know our ip yet
2814 */
9d21493b 2815 if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) ||
4b8a9239 2816 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
1da177e4
LT
2817
2818 slave->link = BOND_LINK_DOWN;
2819 slave->state = BOND_STATE_BACKUP;
2820
3d632c3f 2821 if (slave->link_failure_count < UINT_MAX)
1da177e4 2822 slave->link_failure_count++;
1da177e4 2823
3d632c3f 2824 pr_info(DRV_NAME
1da177e4 2825 ": %s: interface %s is now down.\n",
1b76b316 2826 bond->dev->name,
1da177e4
LT
2827 slave->dev->name);
2828
3d632c3f 2829 if (slave == oldcurrent)
1da177e4 2830 do_failover = 1;
1da177e4
LT
2831 }
2832 }
2833
2834 /* note: if switch is in round-robin mode, all links
2835 * must tx arp to ensure all links rx an arp - otherwise
2836 * links may oscillate or not come up at all; if switch is
2837 * in something like xor mode, there is nothing we can
2838 * do - all replies will be rx'ed on same link causing slaves
2839 * to be unstable during low/no traffic periods
2840 */
3d632c3f 2841 if (IS_UP(slave->dev))
1da177e4 2842 bond_arp_send_all(bond, slave);
1da177e4
LT
2843 }
2844
2845 if (do_failover) {
059fe7a5 2846 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT
2847
2848 bond_select_active_slave(bond);
2849
059fe7a5 2850 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT
2851 }
2852
2853re_arm:
1b76b316
JV
2854 if (bond->params.arp_interval)
2855 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT
2856out:
2857 read_unlock(&bond->lock);
2858}
2859
2860/*
b2220cad
JV
2861 * Called to inspect slaves for active-backup mode ARP monitor link state
2862 * changes. Sets new_link in slaves to specify what action should take
2863 * place for the slave. Returns 0 if no changes are found, >0 if changes
2864 * to link states must be committed.
2865 *
2866 * Called with bond->lock held for read.
1da177e4 2867 */
b2220cad 2868static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
1da177e4 2869{
1da177e4 2870 struct slave *slave;
b2220cad 2871 int i, commit = 0;
1da177e4 2872
b2220cad
JV
2873 bond_for_each_slave(bond, slave, i) {
2874 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2875
b2220cad
JV
2876 if (slave->link != BOND_LINK_UP) {
2877 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2878 delta_in_ticks)) {
2879 slave->new_link = BOND_LINK_UP;
2880 commit++;
2881 }
1da177e4 2882
b2220cad
JV
2883 continue;
2884 }
1da177e4 2885
b2220cad
JV
2886 /*
2887 * Give slaves 2*delta after being enslaved or made
2888 * active. This avoids bouncing, as the last receive
2889 * times need a full ARP monitor cycle to be updated.
2890 */
2891 if (!time_after_eq(jiffies, slave->jiffies +
2892 2 * delta_in_ticks))
2893 continue;
2894
2895 /*
2896 * Backup slave is down if:
2897 * - No current_arp_slave AND
2898 * - more than 3*delta since last receive AND
2899 * - the bond has an IP address
2900 *
2901 * Note: a non-null current_arp_slave indicates
2902 * the curr_active_slave went down and we are
2903 * searching for a new one; under this condition
2904 * we only take the curr_active_slave down - this
2905 * gives each slave a chance to tx/rx traffic
2906 * before being taken out
2907 */
2908 if (slave->state == BOND_STATE_BACKUP &&
2909 !bond->current_arp_slave &&
2910 time_after(jiffies, slave_last_rx(bond, slave) +
2911 3 * delta_in_ticks)) {
2912 slave->new_link = BOND_LINK_DOWN;
2913 commit++;
2914 }
2915
2916 /*
2917 * Active slave is down if:
2918 * - more than 2*delta since transmitting OR
2919 * - (more than 2*delta since receive AND
2920 * the bond has an IP address)
2921 */
2922 if ((slave->state == BOND_STATE_ACTIVE) &&
9d21493b 2923 (time_after_eq(jiffies, dev_trans_start(slave->dev) +
b2220cad
JV
2924 2 * delta_in_ticks) ||
2925 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2926 + 2 * delta_in_ticks)))) {
2927 slave->new_link = BOND_LINK_DOWN;
2928 commit++;
2929 }
1da177e4
LT
2930 }
2931
b2220cad
JV
2932 read_lock(&bond->curr_slave_lock);
2933
2934 /*
2935 * Trigger a commit if the primary option setting has changed.
1da177e4 2936 */
b2220cad
JV
2937 if (bond->primary_slave &&
2938 (bond->primary_slave != bond->curr_active_slave) &&
2939 (bond->primary_slave->link == BOND_LINK_UP))
2940 commit++;
1da177e4 2941
b2220cad 2942 read_unlock(&bond->curr_slave_lock);
1da177e4 2943
b2220cad
JV
2944 return commit;
2945}
1da177e4 2946
b2220cad
JV
2947/*
2948 * Called to commit link state changes noted by inspection step of
2949 * active-backup mode ARP monitor.
2950 *
2951 * Called with RTNL and bond->lock for read.
2952 */
2953static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2954{
2955 struct slave *slave;
2956 int i;
1da177e4 2957
b2220cad
JV
2958 bond_for_each_slave(bond, slave, i) {
2959 switch (slave->new_link) {
2960 case BOND_LINK_NOCHANGE:
2961 continue;
ff59c456 2962
b2220cad
JV
2963 case BOND_LINK_UP:
2964 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2965
b2220cad 2966 if (!bond->curr_active_slave &&
9d21493b 2967 time_before_eq(jiffies, dev_trans_start(slave->dev) +
b2220cad
JV
2968 delta_in_ticks)) {
2969 slave->link = BOND_LINK_UP;
2970 bond_change_active_slave(bond, slave);
2971 bond->current_arp_slave = NULL;
2972
3d632c3f 2973 pr_info(DRV_NAME
b2220cad
JV
2974 ": %s: %s is up and now the "
2975 "active interface\n",
2976 bond->dev->name, slave->dev->name);
2977
2978 } else if (bond->curr_active_slave != slave) {
2979 /* this slave has just come up but we
2980 * already have a current slave; this can
2981 * also happen if bond_enslave adds a new
2982 * slave that is up while we are searching
2983 * for a new slave
1da177e4 2984 */
b2220cad
JV
2985 slave->link = BOND_LINK_UP;
2986 bond_set_slave_inactive_flags(slave);
2987 bond->current_arp_slave = NULL;
2988
3d632c3f 2989 pr_info(DRV_NAME
b2220cad
JV
2990 ": %s: backup interface %s is now up\n",
2991 bond->dev->name, slave->dev->name);
2992 }
1da177e4 2993
b2220cad 2994 write_unlock_bh(&bond->curr_slave_lock);
1da177e4 2995
b2220cad 2996 break;
1da177e4 2997
b2220cad
JV
2998 case BOND_LINK_DOWN:
2999 if (slave->link_failure_count < UINT_MAX)
3000 slave->link_failure_count++;
3001
3002 slave->link = BOND_LINK_DOWN;
3003
3004 if (slave == bond->curr_active_slave) {
3d632c3f 3005 pr_info(DRV_NAME
b2220cad
JV
3006 ": %s: link status down for active "
3007 "interface %s, disabling it\n",
3008 bond->dev->name, slave->dev->name);
1da177e4
LT
3009
3010 bond_set_slave_inactive_flags(slave);
3011
b2220cad
JV
3012 write_lock_bh(&bond->curr_slave_lock);
3013
3014 bond_select_active_slave(bond);
3015 if (bond->curr_active_slave)
3016 bond->curr_active_slave->jiffies =
3017 jiffies;
3018
3019 write_unlock_bh(&bond->curr_slave_lock);
3020
3021 bond->current_arp_slave = NULL;
3022
3023 } else if (slave->state == BOND_STATE_BACKUP) {
3d632c3f 3024 pr_info(DRV_NAME
1da177e4 3025 ": %s: backup interface %s is now down\n",
b2220cad
JV
3026 bond->dev->name, slave->dev->name);
3027
3028 bond_set_slave_inactive_flags(slave);
1da177e4 3029 }
b2220cad
JV
3030 break;
3031
3032 default:
3d632c3f 3033 pr_err(DRV_NAME
b2220cad
JV
3034 ": %s: impossible: new_link %d on slave %s\n",
3035 bond->dev->name, slave->new_link,
3036 slave->dev->name);
1da177e4
LT
3037 }
3038 }
3039
b2220cad
JV
3040 /*
3041 * No race with changes to primary via sysfs, as we hold rtnl.
3042 */
3043 if (bond->primary_slave &&
3044 (bond->primary_slave != bond->curr_active_slave) &&
3045 (bond->primary_slave->link == BOND_LINK_UP)) {
3046 write_lock_bh(&bond->curr_slave_lock);
3047 bond_change_active_slave(bond, bond->primary_slave);
3048 write_unlock_bh(&bond->curr_slave_lock);
3049 }
1da177e4 3050
b2220cad
JV
3051 bond_set_carrier(bond);
3052}
1da177e4 3053
b2220cad
JV
3054/*
3055 * Send ARP probes for active-backup mode ARP monitor.
3056 *
3057 * Called with bond->lock held for read.
3058 */
3059static void bond_ab_arp_probe(struct bonding *bond)
3060{
3061 struct slave *slave;
3062 int i;
1da177e4 3063
b2220cad 3064 read_lock(&bond->curr_slave_lock);
1da177e4 3065
b2220cad 3066 if (bond->current_arp_slave && bond->curr_active_slave)
3d632c3f 3067 pr_info(DRV_NAME "PROBE: c_arp %s && cas %s BAD\n",
b2220cad
JV
3068 bond->current_arp_slave->dev->name,
3069 bond->curr_active_slave->dev->name);
1da177e4 3070
b2220cad
JV
3071 if (bond->curr_active_slave) {
3072 bond_arp_send_all(bond, bond->curr_active_slave);
3073 read_unlock(&bond->curr_slave_lock);
3074 return;
3075 }
1da177e4 3076
b2220cad 3077 read_unlock(&bond->curr_slave_lock);
059fe7a5 3078
b2220cad
JV
3079 /* if we don't have a curr_active_slave, search for the next available
3080 * backup slave from the current_arp_slave and make it the candidate
3081 * for becoming the curr_active_slave
3082 */
1da177e4 3083
b2220cad
JV
3084 if (!bond->current_arp_slave) {
3085 bond->current_arp_slave = bond->first_slave;
3086 if (!bond->current_arp_slave)
3087 return;
3088 }
1da177e4 3089
b2220cad 3090 bond_set_slave_inactive_flags(bond->current_arp_slave);
059fe7a5 3091
b2220cad
JV
3092 /* search for next candidate */
3093 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3094 if (IS_UP(slave->dev)) {
3095 slave->link = BOND_LINK_BACK;
3096 bond_set_slave_active_flags(slave);
3097 bond_arp_send_all(bond, slave);
1da177e4 3098 slave->jiffies = jiffies;
b2220cad
JV
3099 bond->current_arp_slave = slave;
3100 break;
1da177e4
LT
3101 }
3102
b2220cad
JV
3103 /* if the link state is up at this point, we
3104 * mark it down - this can happen if we have
3105 * simultaneous link failures and
3106 * reselect_active_interface doesn't make this
3107 * one the current slave so it is still marked
3108 * up when it is actually down
1da177e4 3109 */
b2220cad
JV
3110 if (slave->link == BOND_LINK_UP) {
3111 slave->link = BOND_LINK_DOWN;
3112 if (slave->link_failure_count < UINT_MAX)
3113 slave->link_failure_count++;
1da177e4 3114
b2220cad
JV
3115 bond_set_slave_inactive_flags(slave);
3116
3d632c3f 3117 pr_info(DRV_NAME
b2220cad
JV
3118 ": %s: backup interface %s is now down.\n",
3119 bond->dev->name, slave->dev->name);
1da177e4 3120 }
b2220cad
JV
3121 }
3122}
1da177e4 3123
b2220cad
JV
3124void bond_activebackup_arp_mon(struct work_struct *work)
3125{
3126 struct bonding *bond = container_of(work, struct bonding,
3127 arp_work.work);
3128 int delta_in_ticks;
1da177e4 3129
b2220cad 3130 read_lock(&bond->lock);
1da177e4 3131
b2220cad
JV
3132 if (bond->kill_timers)
3133 goto out;
1da177e4 3134
b2220cad 3135 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 3136
b2220cad
JV
3137 if (bond->slave_cnt == 0)
3138 goto re_arm;
3139
b59f9f74
JV
3140 if (bond->send_grat_arp) {
3141 read_lock(&bond->curr_slave_lock);
3142 bond_send_gratuitous_arp(bond);
3143 read_unlock(&bond->curr_slave_lock);
3144 }
3145
305d552a
BH
3146 if (bond->send_unsol_na) {
3147 read_lock(&bond->curr_slave_lock);
3148 bond_send_unsolicited_na(bond);
3149 read_unlock(&bond->curr_slave_lock);
3150 }
3151
b2220cad
JV
3152 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3153 read_unlock(&bond->lock);
3154 rtnl_lock();
3155 read_lock(&bond->lock);
3156
3157 bond_ab_arp_commit(bond, delta_in_ticks);
3158
3159 read_unlock(&bond->lock);
3160 rtnl_unlock();
3161 read_lock(&bond->lock);
1da177e4
LT
3162 }
3163
b2220cad
JV
3164 bond_ab_arp_probe(bond);
3165
1da177e4 3166re_arm:
3d632c3f 3167 if (bond->params.arp_interval)
1b76b316 3168 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT
3169out:
3170 read_unlock(&bond->lock);
3171}
3172
3173/*------------------------------ proc/seq_file-------------------------------*/
3174
3175#ifdef CONFIG_PROC_FS
3176
1da177e4 3177static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
1f78d9f9
HE
3178 __acquires(&dev_base_lock)
3179 __acquires(&bond->lock)
1da177e4
LT
3180{
3181 struct bonding *bond = seq->private;
3182 loff_t off = 0;
3183 struct slave *slave;
3184 int i;
3185
3186 /* make sure the bond won't be taken away */
3187 read_lock(&dev_base_lock);
6603a6f2 3188 read_lock(&bond->lock);
1da177e4 3189
3d632c3f 3190 if (*pos == 0)
1da177e4 3191 return SEQ_START_TOKEN;
1da177e4
LT
3192
3193 bond_for_each_slave(bond, slave, i) {
3d632c3f 3194 if (++off == *pos)
1da177e4 3195 return slave;
1da177e4
LT
3196 }
3197
3198 return NULL;
3199}
3200
3201static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3202{
3203 struct bonding *bond = seq->private;
3204 struct slave *slave = v;
3205
3206 ++*pos;
3d632c3f 3207 if (v == SEQ_START_TOKEN)
1da177e4 3208 return bond->first_slave;
1da177e4
LT
3209
3210 slave = slave->next;
3211
3212 return (slave == bond->first_slave) ? NULL : slave;
3213}
3214
3215static void bond_info_seq_stop(struct seq_file *seq, void *v)
1f78d9f9
HE
3216 __releases(&bond->lock)
3217 __releases(&dev_base_lock)
1da177e4
LT
3218{
3219 struct bonding *bond = seq->private;
3220
6603a6f2 3221 read_unlock(&bond->lock);
1da177e4
LT
3222 read_unlock(&dev_base_lock);
3223}
3224
3225static void bond_info_show_master(struct seq_file *seq)
3226{
3227 struct bonding *bond = seq->private;
3228 struct slave *curr;
4756b02f 3229 int i;
1da177e4
LT
3230
3231 read_lock(&bond->curr_slave_lock);
3232 curr = bond->curr_active_slave;
3233 read_unlock(&bond->curr_slave_lock);
3234
dd957c57 3235 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT
3236 bond_mode_name(bond->params.mode));
3237
dd957c57
JV
3238 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3239 bond->params.fail_over_mac)
3915c1e8
JV
3240 seq_printf(seq, " (fail_over_mac %s)",
3241 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
dd957c57
JV
3242
3243 seq_printf(seq, "\n");
3244
c61b75ad
MW
3245 if (bond->params.mode == BOND_MODE_XOR ||
3246 bond->params.mode == BOND_MODE_8023AD) {
3247 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3248 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3249 bond->params.xmit_policy);
3250 }
3251
1da177e4
LT
3252 if (USES_PRIMARY(bond->params.mode)) {
3253 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW
3254 (bond->primary_slave) ?
3255 bond->primary_slave->dev->name : "None");
1da177e4
LT
3256
3257 seq_printf(seq, "Currently Active Slave: %s\n",
3258 (curr) ? curr->dev->name : "None");
3259 }
3260
ff59c456
JV
3261 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3262 "up" : "down");
1da177e4
LT
3263 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3264 seq_printf(seq, "Up Delay (ms): %d\n",
3265 bond->params.updelay * bond->params.miimon);
3266 seq_printf(seq, "Down Delay (ms): %d\n",
3267 bond->params.downdelay * bond->params.miimon);
3268
4756b02f
MW
3269
3270 /* ARP information */
3d632c3f
SH
3271 if (bond->params.arp_interval > 0) {
3272 int printed = 0;
4756b02f
MW
3273 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3274 bond->params.arp_interval);
3275
3276 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3277
3d632c3f 3278 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
4756b02f 3279 if (!bond->params.arp_targets[i])
5a31bec0 3280 break;
4756b02f
MW
3281 if (printed)
3282 seq_printf(seq, ",");
8cf14e38 3283 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
4756b02f
MW
3284 printed = 1;
3285 }
3286 seq_printf(seq, "\n");
3287 }
3288
1da177e4
LT
3289 if (bond->params.mode == BOND_MODE_8023AD) {
3290 struct ad_info ad_info;
3291
3292 seq_puts(seq, "\n802.3ad info\n");
3293 seq_printf(seq, "LACP rate: %s\n",
3294 (bond->params.lacp_fast) ? "fast" : "slow");
fd989c83
JV
3295 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3296 ad_select_tbl[bond->params.ad_select].modename);
1da177e4
LT
3297
3298 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3299 seq_printf(seq, "bond %s has no active aggregator\n",
3300 bond->dev->name);
3301 } else {
3302 seq_printf(seq, "Active Aggregator Info:\n");
3303
3304 seq_printf(seq, "\tAggregator ID: %d\n",
3305 ad_info.aggregator_id);
3306 seq_printf(seq, "\tNumber of ports: %d\n",
3307 ad_info.ports);
3308 seq_printf(seq, "\tActor Key: %d\n",
3309 ad_info.actor_key);
3310 seq_printf(seq, "\tPartner Key: %d\n",
3311 ad_info.partner_key);
e174961c
JB
3312 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3313 ad_info.partner_system);
1da177e4
LT
3314 }
3315 }
3316}
3317
3d632c3f
SH
3318static void bond_info_show_slave(struct seq_file *seq,
3319 const struct slave *slave)
1da177e4
LT
3320{
3321 struct bonding *bond = seq->private;
3322
3323 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3324 seq_printf(seq, "MII Status: %s\n",
3325 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3326 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT
3327 slave->link_failure_count);
3328
e174961c 3329 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
1da177e4
LT
3330
3331 if (bond->params.mode == BOND_MODE_8023AD) {
3332 const struct aggregator *agg
3333 = SLAVE_AD_INFO(slave).port.aggregator;
3334
3d632c3f 3335 if (agg)
1da177e4
LT
3336 seq_printf(seq, "Aggregator ID: %d\n",
3337 agg->aggregator_identifier);
3d632c3f 3338 else
1da177e4 3339 seq_puts(seq, "Aggregator ID: N/A\n");
1da177e4
LT
3340 }
3341}
3342
3343static int bond_info_seq_show(struct seq_file *seq, void *v)
3344{
3345 if (v == SEQ_START_TOKEN) {
3346 seq_printf(seq, "%s\n", version);
3347 bond_info_show_master(seq);
3d632c3f 3348 } else
1da177e4 3349 bond_info_show_slave(seq, v);
1da177e4
LT
3350
3351 return 0;
3352}
3353
4101dec9 3354static const struct seq_operations bond_info_seq_ops = {
1da177e4
LT
3355 .start = bond_info_seq_start,
3356 .next = bond_info_seq_next,
3357 .stop = bond_info_seq_stop,
3358 .show = bond_info_seq_show,
3359};
3360
3361static int bond_info_open(struct inode *inode, struct file *file)
3362{
3363 struct seq_file *seq;
3364 struct proc_dir_entry *proc;
3365 int res;
3366
3367 res = seq_open(file, &bond_info_seq_ops);
3368 if (!res) {
3369 /* recover the pointer buried in proc_dir_entry data */
3370 seq = file->private_data;
3371 proc = PDE(inode);
3372 seq->private = proc->data;
3373 }
3374
3375 return res;
3376}
3377
d54b1fdb 3378static const struct file_operations bond_info_fops = {
1da177e4
LT
3379 .owner = THIS_MODULE,
3380 .open = bond_info_open,
3381 .read = seq_read,
3382 .llseek = seq_lseek,
3383 .release = seq_release,
3384};
3385
3386static int bond_create_proc_entry(struct bonding *bond)
3387{
3388 struct net_device *bond_dev = bond->dev;
3389
3390 if (bond_proc_dir) {
a95609cb
DL
3391 bond->proc_entry = proc_create_data(bond_dev->name,
3392 S_IRUGO, bond_proc_dir,
3393 &bond_info_fops, bond);
3d632c3f
SH
3394 if (bond->proc_entry == NULL)
3395 pr_warning(DRV_NAME
1da177e4
LT
3396 ": Warning: Cannot create /proc/net/%s/%s\n",
3397 DRV_NAME, bond_dev->name);
3d632c3f 3398 else
1da177e4 3399 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
1da177e4
LT
3400 }
3401
3402 return 0;
3403}
3404
3405static void bond_remove_proc_entry(struct bonding *bond)
3406{
3407 if (bond_proc_dir && bond->proc_entry) {
3408 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3409 memset(bond->proc_file_name, 0, IFNAMSIZ);
3410 bond->proc_entry = NULL;
3411 }
3412}
3413
3414/* Create the bonding directory under /proc/net, if doesn't exist yet.
3415 * Caller must hold rtnl_lock.
3416 */
3417static void bond_create_proc_dir(void)
3418{
1da177e4 3419 if (!bond_proc_dir) {
457c4cbc 3420 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
99b76233 3421 if (!bond_proc_dir)
3d632c3f 3422 pr_warning(DRV_NAME
1da177e4
LT
3423 ": Warning: cannot create /proc/net/%s\n",
3424 DRV_NAME);
1da177e4
LT
3425 }
3426}
3427
3428/* Destroy the bonding directory under /proc/net, if empty.
3429 * Caller must hold rtnl_lock.
3430 */
3431static void bond_destroy_proc_dir(void)
3432{
99b76233 3433 if (bond_proc_dir) {
457c4cbc 3434 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT
3435 bond_proc_dir = NULL;
3436 }
3437}
aee64faf
JP
3438
3439#else /* !CONFIG_PROC_FS */
3440
3441static int bond_create_proc_entry(struct bonding *bond)
3442{
3443}
3444
3445static void bond_remove_proc_entry(struct bonding *bond)
3446{
3447}
3448
3449static void bond_create_proc_dir(void)
3450{
3451}
3452
3453static void bond_destroy_proc_dir(void)
3454{
3455}
3456
1da177e4
LT
3457#endif /* CONFIG_PROC_FS */
3458
aee64faf 3459
1da177e4
LT
3460/*-------------------------- netdev event handling --------------------------*/
3461
3462/*
3463 * Change device name
3464 */
3465static int bond_event_changename(struct bonding *bond)
3466{
1da177e4
LT
3467 bond_remove_proc_entry(bond);
3468 bond_create_proc_entry(bond);
7e083840 3469
3d632c3f
SH
3470 bond_destroy_sysfs_entry(bond);
3471 bond_create_sysfs_entry(bond);
7e083840 3472
1da177e4
LT
3473 return NOTIFY_DONE;
3474}
3475
3d632c3f
SH
3476static int bond_master_netdev_event(unsigned long event,
3477 struct net_device *bond_dev)
1da177e4 3478{
454d7c9b 3479 struct bonding *event_bond = netdev_priv(bond_dev);
1da177e4
LT
3480
3481 switch (event) {
3482 case NETDEV_CHANGENAME:
3483 return bond_event_changename(event_bond);
3484 case NETDEV_UNREGISTER:
3b96c858 3485 bond_release_all(event_bond->dev);
1da177e4
LT
3486 break;
3487 default:
3488 break;
3489 }
3490
3491 return NOTIFY_DONE;
3492}
3493
3d632c3f
SH
3494static int bond_slave_netdev_event(unsigned long event,
3495 struct net_device *slave_dev)
1da177e4
LT
3496{
3497 struct net_device *bond_dev = slave_dev->master;
454d7c9b 3498 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
3499
3500 switch (event) {
3501 case NETDEV_UNREGISTER:
3502 if (bond_dev) {
1284cd3a
JV
3503 if (bond->setup_by_slave)
3504 bond_release_and_destroy(bond_dev, slave_dev);
3505 else
3506 bond_release(bond_dev, slave_dev);
1da177e4
LT
3507 }
3508 break;
3509 case NETDEV_CHANGE:
17d04500
JV
3510 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3511 struct slave *slave;
3512
3513 slave = bond_get_slave_by_dev(bond, slave_dev);
3514 if (slave) {
3515 u16 old_speed = slave->speed;
3516 u16 old_duplex = slave->duplex;
3517
3518 bond_update_speed_duplex(slave);
3519
3520 if (bond_is_lb(bond))
3521 break;
3522
3523 if (old_speed != slave->speed)
3524 bond_3ad_adapter_speed_changed(slave);
3525 if (old_duplex != slave->duplex)
3526 bond_3ad_adapter_duplex_changed(slave);
3527 }
3528 }
3529
1da177e4
LT
3530 break;
3531 case NETDEV_DOWN:
3532 /*
3533 * ... Or is it this?
3534 */
3535 break;
3536 case NETDEV_CHANGEMTU:
3537 /*
3538 * TODO: Should slaves be allowed to
3539 * independently alter their MTU? For
3540 * an active-backup bond, slaves need
3541 * not be the same type of device, so
3542 * MTUs may vary. For other modes,
3543 * slaves arguably should have the
3544 * same MTUs. To do this, we'd need to
3545 * take over the slave's change_mtu
3546 * function for the duration of their
3547 * servitude.
3548 */
3549 break;
3550 case NETDEV_CHANGENAME:
3551 /*
3552 * TODO: handle changing the primary's name
3553 */
3554 break;
8531c5ff
AK
3555 case NETDEV_FEAT_CHANGE:
3556 bond_compute_features(bond);
3557 break;
1da177e4
LT
3558 default:
3559 break;
3560 }
3561
3562 return NOTIFY_DONE;
3563}
3564
3565/*
3566 * bond_netdev_event: handle netdev notifier chain events.
3567 *
3568 * This function receives events for the netdev chain. The caller (an
e041c683 3569 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT
3570 * locks for us to safely manipulate the slave devices (RTNL lock,
3571 * dev_probe_lock).
3572 */
3d632c3f
SH
3573static int bond_netdev_event(struct notifier_block *this,
3574 unsigned long event, void *ptr)
1da177e4
LT
3575{
3576 struct net_device *event_dev = (struct net_device *)ptr;
3577
c346dca1 3578 if (dev_net(event_dev) != &init_net)
e9dc8653
EB
3579 return NOTIFY_DONE;
3580
5a03cdb7 3581 pr_debug("event_dev: %s, event: %lx\n",
1da177e4
LT
3582 (event_dev ? event_dev->name : "None"),
3583 event);
3584
0b680e75
JV
3585 if (!(event_dev->priv_flags & IFF_BONDING))
3586 return NOTIFY_DONE;
3587
1da177e4 3588 if (event_dev->flags & IFF_MASTER) {
5a03cdb7 3589 pr_debug("IFF_MASTER\n");
1da177e4
LT
3590 return bond_master_netdev_event(event, event_dev);
3591 }
3592
3593 if (event_dev->flags & IFF_SLAVE) {
5a03cdb7 3594 pr_debug("IFF_SLAVE\n");
1da177e4
LT
3595 return bond_slave_netdev_event(event, event_dev);
3596 }
3597
3598 return NOTIFY_DONE;
3599}
3600
c3ade5ca
JV
3601/*
3602 * bond_inetaddr_event: handle inetaddr notifier chain events.
3603 *
3604 * We keep track of device IPs primarily to use as source addresses in
3605 * ARP monitor probes (rather than spewing out broadcasts all the time).
3606 *
3607 * We track one IP for the main device (if it has one), plus one per VLAN.
3608 */
3609static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3610{
3611 struct in_ifaddr *ifa = ptr;
3612 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
0883beca
PE
3613 struct bonding *bond;
3614 struct vlan_entry *vlan;
c3ade5ca 3615
c346dca1 3616 if (dev_net(ifa->ifa_dev->dev) != &init_net)
6133fb1a
DL
3617 return NOTIFY_DONE;
3618
0883beca 3619 list_for_each_entry(bond, &bond_dev_list, bond_list) {
c3ade5ca
JV
3620 if (bond->dev == event_dev) {
3621 switch (event) {
3622 case NETDEV_UP:
3623 bond->master_ip = ifa->ifa_local;
3624 return NOTIFY_OK;
3625 case NETDEV_DOWN:
3626 bond->master_ip = bond_glean_dev_ip(bond->dev);
3627 return NOTIFY_OK;
3628 default:
3629 return NOTIFY_DONE;
3630 }
3631 }
3632
0883beca 3633 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 3634 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV
3635 if (vlan_dev == event_dev) {
3636 switch (event) {
3637 case NETDEV_UP:
3638 vlan->vlan_ip = ifa->ifa_local;
3639 return NOTIFY_OK;
3640 case NETDEV_DOWN:
3641 vlan->vlan_ip =
3642 bond_glean_dev_ip(vlan_dev);
3643 return NOTIFY_OK;
3644 default:
3645 return NOTIFY_DONE;
3646 }
3647 }
3648 }
3649 }
3650 return NOTIFY_DONE;
3651}
3652
1da177e4
LT
3653static struct notifier_block bond_netdev_notifier = {
3654 .notifier_call = bond_netdev_event,
3655};
3656
c3ade5ca
JV
3657static struct notifier_block bond_inetaddr_notifier = {
3658 .notifier_call = bond_inetaddr_event,
3659};
3660
1da177e4
LT
3661/*-------------------------- Packet type handling ---------------------------*/
3662
3663/* register to receive lacpdus on a bond */
3664static void bond_register_lacpdu(struct bonding *bond)
3665{
3666 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3667
3668 /* initialize packet type */
3669 pk_type->type = PKT_TYPE_LACPDU;
3670 pk_type->dev = bond->dev;
3671 pk_type->func = bond_3ad_lacpdu_recv;
3672
3673 dev_add_pack(pk_type);
3674}
3675
3676/* unregister to receive lacpdus on a bond */
3677static void bond_unregister_lacpdu(struct bonding *bond)
3678{
3679 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3680}
3681
f5b2b966
JV
3682void bond_register_arp(struct bonding *bond)
3683{
3684 struct packet_type *pt = &bond->arp_mon_pt;
3685
c4f283b1
JV
3686 if (pt->type)
3687 return;
3688
f5b2b966 3689 pt->type = htons(ETH_P_ARP);
e245cb71 3690 pt->dev = bond->dev;
f5b2b966
JV
3691 pt->func = bond_arp_rcv;
3692 dev_add_pack(pt);
3693}
3694
3695void bond_unregister_arp(struct bonding *bond)
3696{
c4f283b1
JV
3697 struct packet_type *pt = &bond->arp_mon_pt;
3698
3699 dev_remove_pack(pt);
3700 pt->type = 0;
f5b2b966
JV
3701}
3702
169a3e66
JV
3703/*---------------------------- Hashing Policies -----------------------------*/
3704
6f6652be
JV
3705/*
3706 * Hash for the output device based upon layer 2 and layer 3 data. If
3707 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3708 */
3709static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3710 struct net_device *bond_dev, int count)
3711{
3712 struct ethhdr *data = (struct ethhdr *)skb->data;
3713 struct iphdr *iph = ip_hdr(skb);
3714
f14c4e4e 3715 if (skb->protocol == htons(ETH_P_IP)) {
6f6652be
JV
3716 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3717 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3718 }
3719
3720 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3721}
3722
169a3e66 3723/*
59c51591 3724 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV
3725 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3726 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3727 */
3728static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3729 struct net_device *bond_dev, int count)
3730{
3731 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3732 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3733 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV
3734 int layer4_xor = 0;
3735
f14c4e4e
BH
3736 if (skb->protocol == htons(ETH_P_IP)) {
3737 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
169a3e66
JV
3738 (iph->protocol == IPPROTO_TCP ||
3739 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3740 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV
3741 }
3742 return (layer4_xor ^
3743 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3744
3745 }
3746
3747 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3748}
3749
3750/*
3751 * Hash for the output device based upon layer 2 data
3752 */
3753static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3754 struct net_device *bond_dev, int count)
3755{
3756 struct ethhdr *data = (struct ethhdr *)skb->data;
3757
3758 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3759}
3760
1da177e4
LT
3761/*-------------------------- Device entry points ----------------------------*/
3762
3763static int bond_open(struct net_device *bond_dev)
3764{
454d7c9b 3765 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
3766
3767 bond->kill_timers = 0;
3768
58402054 3769 if (bond_is_lb(bond)) {
1da177e4
LT
3770 /* bond_alb_initialize must be called before the timer
3771 * is started.
3772 */
3773 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3774 /* something went wrong - fail the open operation */
3775 return -1;
3776 }
3777
1b76b316
JV
3778 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3779 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT
3780 }
3781
3782 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV
3783 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3784 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT
3785 }
3786
3787 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV
3788 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3789 INIT_DELAYED_WORK(&bond->arp_work,
3790 bond_activebackup_arp_mon);
3791 else
3792 INIT_DELAYED_WORK(&bond->arp_work,
3793 bond_loadbalance_arp_mon);
3794
3795 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV
3796 if (bond->params.arp_validate)
3797 bond_register_arp(bond);
1da177e4
LT
3798 }
3799
3800 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3801 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3802 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT
3803 /* register to receive LACPDUs */
3804 bond_register_lacpdu(bond);
fd989c83 3805 bond_3ad_initiate_agg_selection(bond, 1);
1da177e4
LT
3806 }
3807
3808 return 0;
3809}
3810
3811static int bond_close(struct net_device *bond_dev)
3812{
454d7c9b 3813 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
3814
3815 if (bond->params.mode == BOND_MODE_8023AD) {
3816 /* Unregister the receive of LACPDUs */
3817 bond_unregister_lacpdu(bond);
3818 }
3819
f5b2b966
JV
3820 if (bond->params.arp_validate)
3821 bond_unregister_arp(bond);
3822
1da177e4
LT
3823 write_lock_bh(&bond->lock);
3824
b59f9f74 3825 bond->send_grat_arp = 0;
305d552a 3826 bond->send_unsol_na = 0;
1da177e4
LT
3827
3828 /* signal timers not to re-arm */
3829 bond->kill_timers = 1;
3830
3831 write_unlock_bh(&bond->lock);
3832
1da177e4 3833 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3834 cancel_delayed_work(&bond->mii_work);
1da177e4
LT
3835 }
3836
3837 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3838 cancel_delayed_work(&bond->arp_work);
1da177e4
LT
3839 }
3840
3841 switch (bond->params.mode) {
3842 case BOND_MODE_8023AD:
1b76b316 3843 cancel_delayed_work(&bond->ad_work);
1da177e4
LT
3844 break;
3845 case BOND_MODE_TLB:
3846 case BOND_MODE_ALB:
1b76b316 3847 cancel_delayed_work(&bond->alb_work);
1da177e4
LT
3848 break;
3849 default:
3850 break;
3851 }
3852
1da177e4 3853
58402054 3854 if (bond_is_lb(bond)) {
1da177e4
LT
3855 /* Must be called only after all
3856 * slaves have been released
3857 */
3858 bond_alb_deinitialize(bond);
3859 }
3860
3861 return 0;
3862}
3863
3864static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3865{
454d7c9b 3866 struct bonding *bond = netdev_priv(bond_dev);
eeda3fd6 3867 struct net_device_stats *stats = &bond->stats;
2439f9eb 3868 struct net_device_stats local_stats;
1da177e4
LT
3869 struct slave *slave;
3870 int i;
3871
2439f9eb 3872 memset(&local_stats, 0, sizeof(struct net_device_stats));
1da177e4
LT
3873
3874 read_lock_bh(&bond->lock);
3875
3876 bond_for_each_slave(bond, slave, i) {
eeda3fd6
SH
3877 const struct net_device_stats *sstats = dev_get_stats(slave->dev);
3878
2439f9eb
AG
3879 local_stats.rx_packets += sstats->rx_packets;
3880 local_stats.rx_bytes += sstats->rx_bytes;
3881 local_stats.rx_errors += sstats->rx_errors;
3882 local_stats.rx_dropped += sstats->rx_dropped;
3883
3884 local_stats.tx_packets += sstats->tx_packets;
3885 local_stats.tx_bytes += sstats->tx_bytes;
3886 local_stats.tx_errors += sstats->tx_errors;
3887 local_stats.tx_dropped += sstats->tx_dropped;
3888
3889 local_stats.multicast += sstats->multicast;
3890 local_stats.collisions += sstats->collisions;
3891
3892 local_stats.rx_length_errors += sstats->rx_length_errors;
3893 local_stats.rx_over_errors += sstats->rx_over_errors;
3894 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3895 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3896 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3897 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3898
3899 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3900 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3901 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3902 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3903 local_stats.tx_window_errors += sstats->tx_window_errors;
3904 }
3905
3906 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
1da177e4
LT
3907
3908 read_unlock_bh(&bond->lock);
3909
3910 return stats;
3911}
3912
3913static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3914{
3915 struct net_device *slave_dev = NULL;
3916 struct ifbond k_binfo;
3917 struct ifbond __user *u_binfo = NULL;
3918 struct ifslave k_sinfo;
3919 struct ifslave __user *u_sinfo = NULL;
3920 struct mii_ioctl_data *mii = NULL;
1da177e4
LT
3921 int res = 0;
3922
5a03cdb7 3923 pr_debug("bond_ioctl: master=%s, cmd=%d\n",
1da177e4
LT
3924 bond_dev->name, cmd);
3925
3926 switch (cmd) {
1da177e4
LT
3927 case SIOCGMIIPHY:
3928 mii = if_mii(ifr);
3d632c3f 3929 if (!mii)
1da177e4 3930 return -EINVAL;
3d632c3f 3931
1da177e4
LT
3932 mii->phy_id = 0;
3933 /* Fall Through */
3934 case SIOCGMIIREG:
3935 /*
3936 * We do this again just in case we were called by SIOCGMIIREG
3937 * instead of SIOCGMIIPHY.
3938 */
3939 mii = if_mii(ifr);
3d632c3f 3940 if (!mii)
1da177e4 3941 return -EINVAL;
3d632c3f 3942
1da177e4
LT
3943
3944 if (mii->reg_num == 1) {
454d7c9b 3945 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 3946 mii->val_out = 0;
6603a6f2 3947 read_lock(&bond->lock);
1da177e4 3948 read_lock(&bond->curr_slave_lock);
3d632c3f 3949 if (netif_carrier_ok(bond->dev))
1da177e4 3950 mii->val_out = BMSR_LSTATUS;
3d632c3f 3951
1da177e4 3952 read_unlock(&bond->curr_slave_lock);
6603a6f2 3953 read_unlock(&bond->lock);
1da177e4
LT
3954 }
3955
3956 return 0;
3957 case BOND_INFO_QUERY_OLD:
3958 case SIOCBONDINFOQUERY:
3959 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3960
3d632c3f 3961 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
1da177e4 3962 return -EFAULT;
1da177e4
LT
3963
3964 res = bond_info_query(bond_dev, &k_binfo);
3d632c3f
SH
3965 if (res == 0 &&
3966 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3967 return -EFAULT;
1da177e4
LT
3968
3969 return res;
3970 case BOND_SLAVE_INFO_QUERY_OLD:
3971 case SIOCBONDSLAVEINFOQUERY:
3972 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3973
3d632c3f 3974 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
1da177e4 3975 return -EFAULT;
1da177e4
LT
3976
3977 res = bond_slave_info_query(bond_dev, &k_sinfo);
3d632c3f
SH
3978 if (res == 0 &&
3979 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3980 return -EFAULT;
1da177e4
LT
3981
3982 return res;
3983 default:
3984 /* Go on */
3985 break;
3986 }
3987
3d632c3f 3988 if (!capable(CAP_NET_ADMIN))
1da177e4 3989 return -EPERM;
1da177e4 3990
881d966b 3991 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4 3992
5a03cdb7 3993 pr_debug("slave_dev=%p: \n", slave_dev);
1da177e4 3994
3d632c3f 3995 if (!slave_dev)
1da177e4 3996 res = -ENODEV;
3d632c3f 3997 else {
5a03cdb7 3998 pr_debug("slave_dev->name=%s: \n", slave_dev->name);
1da177e4
LT
3999 switch (cmd) {
4000 case BOND_ENSLAVE_OLD:
4001 case SIOCBONDENSLAVE:
4002 res = bond_enslave(bond_dev, slave_dev);
4003 break;
4004 case BOND_RELEASE_OLD:
4005 case SIOCBONDRELEASE:
4006 res = bond_release(bond_dev, slave_dev);
4007 break;
4008 case BOND_SETHWADDR_OLD:
4009 case SIOCBONDSETHWADDR:
4010 res = bond_sethwaddr(bond_dev, slave_dev);
4011 break;
4012 case BOND_CHANGE_ACTIVE_OLD:
4013 case SIOCBONDCHANGEACTIVE:
4014 res = bond_ioctl_change_active(bond_dev, slave_dev);
4015 break;
4016 default:
4017 res = -EOPNOTSUPP;
4018 }
4019
4020 dev_put(slave_dev);
4021 }
4022
1da177e4
LT
4023 return res;
4024}
4025
4026static void bond_set_multicast_list(struct net_device *bond_dev)
4027{
454d7c9b 4028 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4029 struct dev_mc_list *dmi;
4030
1da177e4
LT
4031 /*
4032 * Do promisc before checking multicast_mode
4033 */
3d632c3f 4034 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
7e1a1ac1
WC
4035 /*
4036 * FIXME: Need to handle the error when one of the multi-slaves
4037 * encounters error.
4038 */
1da177e4 4039 bond_set_promiscuity(bond, 1);
1da177e4 4040
3d632c3f
SH
4041
4042 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
1da177e4 4043 bond_set_promiscuity(bond, -1);
3d632c3f 4044
1da177e4
LT
4045
4046 /* set allmulti flag to slaves */
3d632c3f 4047 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
7e1a1ac1
WC
4048 /*
4049 * FIXME: Need to handle the error when one of the multi-slaves
4050 * encounters error.
4051 */
1da177e4 4052 bond_set_allmulti(bond, 1);
1da177e4 4053
3d632c3f
SH
4054
4055 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
1da177e4 4056 bond_set_allmulti(bond, -1);
3d632c3f 4057
1da177e4 4058
80ee5ad2
JV
4059 read_lock(&bond->lock);
4060
1da177e4
LT
4061 bond->flags = bond_dev->flags;
4062
4063 /* looking for addresses to add to slaves' mc list */
4064 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3d632c3f 4065 if (!bond_mc_list_find_dmi(dmi, bond->mc_list))
1da177e4 4066 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
1da177e4
LT
4067 }
4068
4069 /* looking for addresses to delete from slaves' list */
4070 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3d632c3f 4071 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list))
1da177e4 4072 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
1da177e4
LT
4073 }
4074
4075 /* save master's multicast list */
4076 bond_mc_list_destroy(bond);
4077 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4078
80ee5ad2 4079 read_unlock(&bond->lock);
1da177e4
LT
4080}
4081
00829823
SH
4082static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4083{
4084 struct bonding *bond = netdev_priv(dev);
4085 struct slave *slave = bond->first_slave;
4086
4087 if (slave) {
4088 const struct net_device_ops *slave_ops
4089 = slave->dev->netdev_ops;
4090 if (slave_ops->ndo_neigh_setup)
72e2240f 4091 return slave_ops->ndo_neigh_setup(slave->dev, parms);
00829823
SH
4092 }
4093 return 0;
4094}
4095
1da177e4
LT
4096/*
4097 * Change the MTU of all of a master's slaves to match the master
4098 */
4099static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4100{
454d7c9b 4101 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4102 struct slave *slave, *stop_at;
4103 int res = 0;
4104 int i;
4105
5a03cdb7 4106 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
1da177e4
LT
4107 (bond_dev ? bond_dev->name : "None"), new_mtu);
4108
4109 /* Can't hold bond->lock with bh disabled here since
4110 * some base drivers panic. On the other hand we can't
4111 * hold bond->lock without bh disabled because we'll
4112 * deadlock. The only solution is to rely on the fact
4113 * that we're under rtnl_lock here, and the slaves
4114 * list won't change. This doesn't solve the problem
4115 * of setting the slave's MTU while it is
4116 * transmitting, but the assumption is that the base
4117 * driver can handle that.
4118 *
4119 * TODO: figure out a way to safely iterate the slaves
4120 * list, but without holding a lock around the actual
4121 * call to the base driver.
4122 */
4123
4124 bond_for_each_slave(bond, slave, i) {
5a03cdb7 4125 pr_debug("s %p s->p %p c_m %p\n", slave,
53a3294e 4126 slave->prev, slave->dev->netdev_ops->ndo_change_mtu);
e944ef79 4127
1da177e4
LT
4128 res = dev_set_mtu(slave->dev, new_mtu);
4129
4130 if (res) {
4131 /* If we failed to set the slave's mtu to the new value
4132 * we must abort the operation even in ACTIVE_BACKUP
4133 * mode, because if we allow the backup slaves to have
4134 * different mtu values than the active slave we'll
4135 * need to change their mtu when doing a failover. That
4136 * means changing their mtu from timer context, which
4137 * is probably not a good idea.
4138 */
5a03cdb7 4139 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT
4140 goto unwind;
4141 }
4142 }
4143
4144 bond_dev->mtu = new_mtu;
4145
4146 return 0;
4147
4148unwind:
4149 /* unwind from head to the slave that failed */
4150 stop_at = slave;
4151 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4152 int tmp_res;
4153
4154 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4155 if (tmp_res) {
5a03cdb7 4156 pr_debug("unwind err %d dev %s\n", tmp_res,
1da177e4
LT
4157 slave->dev->name);
4158 }
4159 }
4160
4161 return res;
4162}
4163
4164/*
4165 * Change HW address
4166 *
4167 * Note that many devices must be down to change the HW address, and
4168 * downing the master releases all slaves. We can make bonds full of
4169 * bonding devices to test this, however.
4170 */
4171static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4172{
454d7c9b 4173 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4174 struct sockaddr *sa = addr, tmp_sa;
4175 struct slave *slave, *stop_at;
4176 int res = 0;
4177 int i;
4178
eb7cc59a
SH
4179 if (bond->params.mode == BOND_MODE_ALB)
4180 return bond_alb_set_mac_address(bond_dev, addr);
4181
4182
5a03cdb7 4183 pr_debug("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
1da177e4 4184
dd957c57 4185 /*
3915c1e8
JV
4186 * If fail_over_mac is set to active, do nothing and return
4187 * success. Returning an error causes ifenslave to fail.
dd957c57 4188 */
3915c1e8 4189 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
dd957c57 4190 return 0;
2ab82852 4191
3d632c3f 4192 if (!is_valid_ether_addr(sa->sa_data))
1da177e4 4193 return -EADDRNOTAVAIL;
1da177e4
LT
4194
4195 /* Can't hold bond->lock with bh disabled here since
4196 * some base drivers panic. On the other hand we can't
4197 * hold bond->lock without bh disabled because we'll
4198 * deadlock. The only solution is to rely on the fact
4199 * that we're under rtnl_lock here, and the slaves
4200 * list won't change. This doesn't solve the problem
4201 * of setting the slave's hw address while it is
4202 * transmitting, but the assumption is that the base
4203 * driver can handle that.
4204 *
4205 * TODO: figure out a way to safely iterate the slaves
4206 * list, but without holding a lock around the actual
4207 * call to the base driver.
4208 */
4209
4210 bond_for_each_slave(bond, slave, i) {
eb7cc59a 4211 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
5a03cdb7 4212 pr_debug("slave %p %s\n", slave, slave->dev->name);
1da177e4 4213
eb7cc59a 4214 if (slave_ops->ndo_set_mac_address == NULL) {
1da177e4 4215 res = -EOPNOTSUPP;
5a03cdb7 4216 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
1da177e4
LT
4217 goto unwind;
4218 }
4219
4220 res = dev_set_mac_address(slave->dev, addr);
4221 if (res) {
4222 /* TODO: consider downing the slave
4223 * and retry ?
4224 * User should expect communications
4225 * breakage anyway until ARP finish
4226 * updating, so...
4227 */
5a03cdb7 4228 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT
4229 goto unwind;
4230 }
4231 }
4232
4233 /* success */
4234 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4235 return 0;
4236
4237unwind:
4238 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4239 tmp_sa.sa_family = bond_dev->type;
4240
4241 /* unwind from head to the slave that failed */
4242 stop_at = slave;
4243 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4244 int tmp_res;
4245
4246 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4247 if (tmp_res) {
5a03cdb7 4248 pr_debug("unwind err %d dev %s\n", tmp_res,
1da177e4
LT
4249 slave->dev->name);
4250 }
4251 }
4252
4253 return res;
4254}
4255
4256static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4257{
454d7c9b 4258 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4259 struct slave *slave, *start_at;
cf5f9044 4260 int i, slave_no, res = 1;
1da177e4
LT
4261
4262 read_lock(&bond->lock);
4263
3d632c3f 4264 if (!BOND_IS_OK(bond))
1da177e4 4265 goto out;
1da177e4 4266
cf5f9044
JV
4267 /*
4268 * Concurrent TX may collide on rr_tx_counter; we accept that
4269 * as being rare enough not to justify using an atomic op here
4270 */
4271 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4272
cf5f9044
JV
4273 bond_for_each_slave(bond, slave, i) {
4274 slave_no--;
3d632c3f 4275 if (slave_no < 0)
cf5f9044 4276 break;
1da177e4
LT
4277 }
4278
cf5f9044 4279 start_at = slave;
1da177e4
LT
4280 bond_for_each_slave_from(bond, slave, i, start_at) {
4281 if (IS_UP(slave->dev) &&
4282 (slave->link == BOND_LINK_UP) &&
4283 (slave->state == BOND_STATE_ACTIVE)) {
4284 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT
4285 break;
4286 }
4287 }
4288
1da177e4
LT
4289out:
4290 if (res) {
4291 /* no suitable interface, frame not sent */
4292 dev_kfree_skb(skb);
4293 }
4294 read_unlock(&bond->lock);
ec634fe3 4295 return NETDEV_TX_OK;
1da177e4
LT
4296}
4297
075897ce 4298
1da177e4
LT
4299/*
4300 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4301 * the bond has a usable interface.
4302 */
4303static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4304{
454d7c9b 4305 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4306 int res = 1;
4307
1da177e4
LT
4308 read_lock(&bond->lock);
4309 read_lock(&bond->curr_slave_lock);
4310
3d632c3f 4311 if (!BOND_IS_OK(bond))
1da177e4 4312 goto out;
1da177e4 4313
075897ce
JL
4314 if (!bond->curr_active_slave)
4315 goto out;
4316
075897ce
JL
4317 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4318
1da177e4 4319out:
3d632c3f 4320 if (res)
1da177e4
LT
4321 /* no suitable interface, frame not sent */
4322 dev_kfree_skb(skb);
3d632c3f 4323
1da177e4
LT
4324 read_unlock(&bond->curr_slave_lock);
4325 read_unlock(&bond->lock);
ec634fe3 4326 return NETDEV_TX_OK;
1da177e4
LT
4327}
4328
4329/*
169a3e66
JV
4330 * In bond_xmit_xor() , we determine the output device by using a pre-
4331 * determined xmit_hash_policy(), If the selected device is not enabled,
4332 * find the next active slave.
1da177e4
LT
4333 */
4334static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4335{
454d7c9b 4336 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4337 struct slave *slave, *start_at;
4338 int slave_no;
4339 int i;
4340 int res = 1;
4341
4342 read_lock(&bond->lock);
4343
3d632c3f 4344 if (!BOND_IS_OK(bond))
1da177e4 4345 goto out;
1da177e4 4346
169a3e66 4347 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT
4348
4349 bond_for_each_slave(bond, slave, i) {
4350 slave_no--;
3d632c3f 4351 if (slave_no < 0)
1da177e4 4352 break;
1da177e4
LT
4353 }
4354
4355 start_at = slave;
4356
4357 bond_for_each_slave_from(bond, slave, i, start_at) {
4358 if (IS_UP(slave->dev) &&
4359 (slave->link == BOND_LINK_UP) &&
4360 (slave->state == BOND_STATE_ACTIVE)) {
4361 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4362 break;
4363 }
4364 }
4365
4366out:
4367 if (res) {
4368 /* no suitable interface, frame not sent */
4369 dev_kfree_skb(skb);
4370 }
4371 read_unlock(&bond->lock);
ec634fe3 4372 return NETDEV_TX_OK;
1da177e4
LT
4373}
4374
4375/*
4376 * in broadcast mode, we send everything to all usable interfaces.
4377 */
4378static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4379{
454d7c9b 4380 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT
4381 struct slave *slave, *start_at;
4382 struct net_device *tx_dev = NULL;
4383 int i;
4384 int res = 1;
4385
4386 read_lock(&bond->lock);
4387
3d632c3f 4388 if (!BOND_IS_OK(bond))
1da177e4 4389 goto out;
1da177e4
LT
4390
4391 read_lock(&bond->curr_slave_lock);
4392 start_at = bond->curr_active_slave;
4393 read_unlock(&bond->curr_slave_lock);
4394
3d632c3f 4395 if (!start_at)
1da177e4 4396 goto out;
1da177e4
LT
4397
4398 bond_for_each_slave_from(bond, slave, i, start_at) {
4399 if (IS_UP(slave->dev) &&
4400 (slave->link == BOND_LINK_UP) &&
4401 (slave->state == BOND_STATE_ACTIVE)) {
4402 if (tx_dev) {
4403 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4404 if (!skb2) {
3d632c3f 4405 pr_err(DRV_NAME
4e0952c7
MW
4406 ": %s: Error: bond_xmit_broadcast(): "
4407 "skb_clone() failed\n",
4408 bond_dev->name);
1da177e4
LT
4409 continue;
4410 }
4411
4412 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4413 if (res) {
4414 dev_kfree_skb(skb2);
4415 continue;
4416 }
4417 }
4418 tx_dev = slave->dev;
4419 }
4420 }
4421
3d632c3f 4422 if (tx_dev)
1da177e4 4423 res = bond_dev_queue_xmit(bond, skb, tx_dev);
1da177e4
LT
4424
4425out:
3d632c3f 4426 if (res)
1da177e4
LT
4427 /* no suitable interface, frame not sent */
4428 dev_kfree_skb(skb);
3d632c3f 4429
1da177e4
LT
4430 /* frame sent to all suitable interfaces */
4431 read_unlock(&bond->lock);
ec634fe3 4432 return NETDEV_TX_OK;
1da177e4
LT
4433}
4434
4435/*------------------------- Device initialization ---------------------------*/
4436
6f6652be
JV
4437static void bond_set_xmit_hash_policy(struct bonding *bond)
4438{
4439 switch (bond->params.xmit_policy) {
4440 case BOND_XMIT_POLICY_LAYER23:
4441 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4442 break;
4443 case BOND_XMIT_POLICY_LAYER34:
4444 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4445 break;
4446 case BOND_XMIT_POLICY_LAYER2:
4447 default:
4448 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4449 break;
4450 }
4451}
4452
00829823
SH
4453static int bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4454{
4455 const struct bonding *bond = netdev_priv(dev);
4456
4457 switch (bond->params.mode) {
4458 case BOND_MODE_ROUNDROBIN:
4459 return bond_xmit_roundrobin(skb, dev);
4460 case BOND_MODE_ACTIVEBACKUP:
4461 return bond_xmit_activebackup(skb, dev);
4462 case BOND_MODE_XOR:
4463 return bond_xmit_xor(skb, dev);
4464 case BOND_MODE_BROADCAST:
4465 return bond_xmit_broadcast(skb, dev);
4466 case BOND_MODE_8023AD:
4467 return bond_3ad_xmit_xor(skb, dev);
4468 case BOND_MODE_ALB:
4469 case BOND_MODE_TLB:
4470 return bond_alb_xmit(skb, dev);
4471 default:
4472 /* Should never happen, mode already checked */
3d632c3f 4473 pr_err(DRV_NAME ": %s: Error: Unknown bonding mode %d\n",
00829823
SH
4474 dev->name, bond->params.mode);
4475 WARN_ON_ONCE(1);
4476 dev_kfree_skb(skb);
4477 return NETDEV_TX_OK;
4478 }
4479}
4480
4481
1da177e4
LT
4482/*
4483 * set bond mode specific net device operations
4484 */
a77b5325 4485void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4486{
169a3e66
JV
4487 struct net_device *bond_dev = bond->dev;
4488
1da177e4
LT
4489 switch (mode) {
4490 case BOND_MODE_ROUNDROBIN:
1da177e4
LT
4491 break;
4492 case BOND_MODE_ACTIVEBACKUP:
1da177e4
LT
4493 break;
4494 case BOND_MODE_XOR:
6f6652be 4495 bond_set_xmit_hash_policy(bond);
1da177e4
LT
4496 break;
4497 case BOND_MODE_BROADCAST:
1da177e4
LT
4498 break;
4499 case BOND_MODE_8023AD:
8f903c70 4500 bond_set_master_3ad_flags(bond);
6f6652be 4501 bond_set_xmit_hash_policy(bond);
1da177e4 4502 break;
1da177e4 4503 case BOND_MODE_ALB:
8f903c70
JV
4504 bond_set_master_alb_flags(bond);
4505 /* FALLTHRU */
4506 case BOND_MODE_TLB:
1da177e4
LT
4507 break;
4508 default:
4509 /* Should never happen, mode already checked */
3d632c3f 4510 pr_err(DRV_NAME
4e0952c7
MW
4511 ": %s: Error: Unknown bonding mode %d\n",
4512 bond_dev->name,
1da177e4
LT
4513 mode);
4514 break;
4515 }
4516}
4517
217df670
JV
4518static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4519 struct ethtool_drvinfo *drvinfo)
4520{
4521 strncpy(drvinfo->driver, DRV_NAME, 32);
4522 strncpy(drvinfo->version, DRV_VERSION, 32);
4523 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4524}
4525
7282d491 4526static const struct ethtool_ops bond_ethtool_ops = {
217df670 4527 .get_drvinfo = bond_ethtool_get_drvinfo,
fa53ebac
SH
4528 .get_link = ethtool_op_get_link,
4529 .get_tx_csum = ethtool_op_get_tx_csum,
4530 .get_sg = ethtool_op_get_sg,
4531 .get_tso = ethtool_op_get_tso,
4532 .get_ufo = ethtool_op_get_ufo,
4533 .get_flags = ethtool_op_get_flags,
8531c5ff
AK
4534};
4535
eb7cc59a 4536static const struct net_device_ops bond_netdev_ops = {
181470fc 4537 .ndo_init = bond_init,
9e71626c 4538 .ndo_uninit = bond_uninit,
eb7cc59a
SH
4539 .ndo_open = bond_open,
4540 .ndo_stop = bond_close,
00829823 4541 .ndo_start_xmit = bond_start_xmit,
eb7cc59a
SH
4542 .ndo_get_stats = bond_get_stats,
4543 .ndo_do_ioctl = bond_do_ioctl,
4544 .ndo_set_multicast_list = bond_set_multicast_list,
4545 .ndo_change_mtu = bond_change_mtu,
eb7cc59a 4546 .ndo_set_mac_address = bond_set_mac_address,
00829823 4547 .ndo_neigh_setup = bond_neigh_setup,
eb7cc59a
SH
4548 .ndo_vlan_rx_register = bond_vlan_rx_register,
4549 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4550 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4551};
4552
181470fc 4553static void bond_setup(struct net_device *bond_dev)
1da177e4 4554{
454d7c9b 4555 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4556
1da177e4
LT
4557 /* initialize rwlocks */
4558 rwlock_init(&bond->lock);
4559 rwlock_init(&bond->curr_slave_lock);
4560
d2991f75 4561 bond->params = bonding_defaults;
1da177e4
LT
4562
4563 /* Initialize pointers */
1da177e4
LT
4564 bond->dev = bond_dev;
4565 INIT_LIST_HEAD(&bond->vlan_list);
4566
4567 /* Initialize the device entry points */
181470fc 4568 ether_setup(bond_dev);
eb7cc59a 4569 bond_dev->netdev_ops = &bond_netdev_ops;
8531c5ff 4570 bond_dev->ethtool_ops = &bond_ethtool_ops;
169a3e66 4571 bond_set_mode_ops(bond, bond->params.mode);
1da177e4 4572
9e71626c 4573 bond_dev->destructor = free_netdev;
1da177e4
LT
4574
4575 /* Initialize the device options */
4576 bond_dev->tx_queue_len = 0;
4577 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4578 bond_dev->priv_flags |= IFF_BONDING;
181470fc
SH
4579 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4580
6cf3f41e
JV
4581 if (bond->params.arp_interval)
4582 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
1da177e4
LT
4583
4584 /* At first, we block adding VLANs. That's the only way to
4585 * prevent problems that occur when adding VLANs over an
4586 * empty bond. The block will be removed once non-challenged
4587 * slaves are enslaved.
4588 */
4589 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4590
932ff279 4591 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT
4592 * transmitting */
4593 bond_dev->features |= NETIF_F_LLTX;
4594
4595 /* By default, we declare the bond to be fully
4596 * VLAN hardware accelerated capable. Special
4597 * care is taken in the various xmit functions
4598 * when there are slaves that are not hw accel
4599 * capable
4600 */
1da177e4
LT
4601 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4602 NETIF_F_HW_VLAN_RX |
4603 NETIF_F_HW_VLAN_FILTER);
4604
1da177e4
LT
4605}
4606
fdaea7a9
JV
4607static void bond_work_cancel_all(struct bonding *bond)
4608{
4609 write_lock_bh(&bond->lock);
4610 bond->kill_timers = 1;
4611 write_unlock_bh(&bond->lock);
4612
4613 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4614 cancel_delayed_work(&bond->mii_work);
4615
4616 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4617 cancel_delayed_work(&bond->arp_work);
4618
4619 if (bond->params.mode == BOND_MODE_ALB &&
4620 delayed_work_pending(&bond->alb_work))
4621 cancel_delayed_work(&bond->alb_work);
4622
4623 if (bond->params.mode == BOND_MODE_8023AD &&
4624 delayed_work_pending(&bond->ad_work))
4625 cancel_delayed_work(&bond->ad_work);
4626}
4627
a434e43f
JV
4628/* De-initialize device specific data.
4629 * Caller must hold rtnl_lock.
4630 */
4631static void bond_deinit(struct net_device *bond_dev)
4632{
454d7c9b 4633 struct bonding *bond = netdev_priv(bond_dev);
a434e43f
JV
4634
4635 list_del(&bond->bond_list);
4636
4637 bond_work_cancel_all(bond);
4638
a434e43f 4639 bond_remove_proc_entry(bond);
a434e43f
JV
4640}
4641
1da177e4
LT
4642/* Unregister and free all bond devices.
4643 * Caller must hold rtnl_lock.
4644 */
4645static void bond_free_all(void)
4646{
4647 struct bonding *bond, *nxt;
4648
4649 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4650 struct net_device *bond_dev = bond->dev;
4651
fdaea7a9 4652 bond_work_cancel_all(bond);
70298705 4653 /* Release the bonded slaves */
4654 bond_release_all(bond_dev);
9e71626c 4655 unregister_netdevice(bond_dev);
1da177e4
LT
4656 }
4657
1da177e4 4658 bond_destroy_proc_dir();
1da177e4
LT
4659}
4660
4661/*------------------------- Module initialization ---------------------------*/
4662
4663/*
4664 * Convert string input module parms. Accept either the
ece95f7f
JV
4665 * number of the mode or its string name. A bit complicated because
4666 * some mode names are substrings of other names, and calls from sysfs
4667 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4668 */
325dcf7a 4669int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
1da177e4 4670{
54b87323 4671 int modeint = -1, i, rv;
a42e534f 4672 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
ece95f7f 4673
a42e534f
JV
4674 for (p = (char *)buf; *p; p++)
4675 if (!(isdigit(*p) || isspace(*p)))
4676 break;
4677
4678 if (*p)
ece95f7f 4679 rv = sscanf(buf, "%20s", modestr);
a42e534f 4680 else
54b87323 4681 rv = sscanf(buf, "%d", &modeint);
a42e534f
JV
4682
4683 if (!rv)
4684 return -1;
1da177e4
LT
4685
4686 for (i = 0; tbl[i].modename; i++) {
54b87323 4687 if (modeint == tbl[i].mode)
ece95f7f
JV
4688 return tbl[i].mode;
4689 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4690 return tbl[i].mode;
1da177e4
LT
4691 }
4692
4693 return -1;
4694}
4695
4696static int bond_check_params(struct bond_params *params)
4697{
3915c1e8 4698 int arp_validate_value, fail_over_mac_value;
f5b2b966 4699
1da177e4
LT
4700 /*
4701 * Convert string parameters.
4702 */
4703 if (mode) {
4704 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4705 if (bond_mode == -1) {
3d632c3f 4706 pr_err(DRV_NAME
1da177e4
LT
4707 ": Error: Invalid bonding mode \"%s\"\n",
4708 mode == NULL ? "NULL" : mode);
4709 return -EINVAL;
4710 }
4711 }
4712
169a3e66
JV
4713 if (xmit_hash_policy) {
4714 if ((bond_mode != BOND_MODE_XOR) &&
4715 (bond_mode != BOND_MODE_8023AD)) {
3d632c3f 4716 pr_info(DRV_NAME
169a3e66
JV
4717 ": xor_mode param is irrelevant in mode %s\n",
4718 bond_mode_name(bond_mode));
4719 } else {
4720 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4721 xmit_hashtype_tbl);
4722 if (xmit_hashtype == -1) {
3d632c3f
SH
4723 pr_err(DRV_NAME
4724 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4725 xmit_hash_policy == NULL ? "NULL" :
169a3e66
JV
4726 xmit_hash_policy);
4727 return -EINVAL;
4728 }
4729 }
4730 }
4731
1da177e4
LT
4732 if (lacp_rate) {
4733 if (bond_mode != BOND_MODE_8023AD) {
3d632c3f 4734 pr_info(DRV_NAME
1da177e4
LT
4735 ": lacp_rate param is irrelevant in mode %s\n",
4736 bond_mode_name(bond_mode));
4737 } else {
4738 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4739 if (lacp_fast == -1) {
3d632c3f 4740 pr_err(DRV_NAME
1da177e4
LT
4741 ": Error: Invalid lacp rate \"%s\"\n",
4742 lacp_rate == NULL ? "NULL" : lacp_rate);
4743 return -EINVAL;
4744 }
4745 }
4746 }
4747
fd989c83
JV
4748 if (ad_select) {
4749 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4750 if (params->ad_select == -1) {
3d632c3f 4751 pr_err(DRV_NAME
fd989c83
JV
4752 ": Error: Invalid ad_select \"%s\"\n",
4753 ad_select == NULL ? "NULL" : ad_select);
4754 return -EINVAL;
4755 }
4756
4757 if (bond_mode != BOND_MODE_8023AD) {
3d632c3f 4758 pr_warning(DRV_NAME
fd989c83
JV
4759 ": ad_select param only affects 802.3ad mode\n");
4760 }
4761 } else {
4762 params->ad_select = BOND_AD_STABLE;
4763 }
4764
f5841306 4765 if (max_bonds < 0) {
3d632c3f 4766 pr_warning(DRV_NAME
1da177e4 4767 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4768 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
b8a9787e 4769 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT
4770 max_bonds = BOND_DEFAULT_MAX_BONDS;
4771 }
4772
4773 if (miimon < 0) {
3d632c3f 4774 pr_warning(DRV_NAME
1da177e4
LT
4775 ": Warning: miimon module parameter (%d), "
4776 "not in range 0-%d, so it was reset to %d\n",
4777 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4778 miimon = BOND_LINK_MON_INTERV;
4779 }
4780
4781 if (updelay < 0) {
3d632c3f 4782 pr_warning(DRV_NAME
1da177e4
LT
4783 ": Warning: updelay module parameter (%d), "
4784 "not in range 0-%d, so it was reset to 0\n",
4785 updelay, INT_MAX);
4786 updelay = 0;
4787 }
4788
4789 if (downdelay < 0) {
3d632c3f 4790 pr_warning(DRV_NAME
1da177e4
LT
4791 ": Warning: downdelay module parameter (%d), "
4792 "not in range 0-%d, so it was reset to 0\n",
4793 downdelay, INT_MAX);
4794 downdelay = 0;
4795 }
4796
4797 if ((use_carrier != 0) && (use_carrier != 1)) {
3d632c3f 4798 pr_warning(DRV_NAME
1da177e4
LT
4799 ": Warning: use_carrier module parameter (%d), "
4800 "not of valid value (0/1), so it was set to 1\n",
4801 use_carrier);
4802 use_carrier = 1;
4803 }
4804
7893b249 4805 if (num_grat_arp < 0 || num_grat_arp > 255) {
3d632c3f 4806 pr_warning(DRV_NAME
7893b249
MS
4807 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4808 "was reset to 1 \n", num_grat_arp);
4809 num_grat_arp = 1;
4810 }
4811
305d552a 4812 if (num_unsol_na < 0 || num_unsol_na > 255) {
3d632c3f 4813 pr_warning(DRV_NAME
305d552a
BH
4814 ": Warning: num_unsol_na (%d) not in range 0-255 so it "
4815 "was reset to 1 \n", num_unsol_na);
4816 num_unsol_na = 1;
4817 }
4818
1da177e4
LT
4819 /* reset values for 802.3ad */
4820 if (bond_mode == BOND_MODE_8023AD) {
4821 if (!miimon) {
3d632c3f 4822 pr_warning(DRV_NAME
1da177e4
LT
4823 ": Warning: miimon must be specified, "
4824 "otherwise bonding will not detect link "
4825 "failure, speed and duplex which are "
4826 "essential for 802.3ad operation\n");
3d632c3f 4827 pr_warning("Forcing miimon to 100msec\n");
1da177e4
LT
4828 miimon = 100;
4829 }
4830 }
4831
4832 /* reset values for TLB/ALB */
4833 if ((bond_mode == BOND_MODE_TLB) ||
4834 (bond_mode == BOND_MODE_ALB)) {
4835 if (!miimon) {
3d632c3f 4836 pr_warning(DRV_NAME
1da177e4
LT
4837 ": Warning: miimon must be specified, "
4838 "otherwise bonding will not detect link "
4839 "failure and link speed which are essential "
4840 "for TLB/ALB load balancing\n");
3d632c3f 4841 pr_warning("Forcing miimon to 100msec\n");
1da177e4
LT
4842 miimon = 100;
4843 }
4844 }
4845
4846 if (bond_mode == BOND_MODE_ALB) {
e5e2a8fd 4847 pr_notice(DRV_NAME
1da177e4
LT
4848 ": In ALB mode you might experience client "
4849 "disconnections upon reconnection of a link if the "
4850 "bonding module updelay parameter (%d msec) is "
4851 "incompatible with the forwarding delay time of the "
4852 "switch\n",
4853 updelay);
4854 }
4855
4856 if (!miimon) {
4857 if (updelay || downdelay) {
4858 /* just warn the user the up/down delay will have
4859 * no effect since miimon is zero...
4860 */
3d632c3f 4861 pr_warning(DRV_NAME
1da177e4
LT
4862 ": Warning: miimon module parameter not set "
4863 "and updelay (%d) or downdelay (%d) module "
4864 "parameter is set; updelay and downdelay have "
4865 "no effect unless miimon is set\n",
4866 updelay, downdelay);
4867 }
4868 } else {
4869 /* don't allow arp monitoring */
4870 if (arp_interval) {
3d632c3f 4871 pr_warning(DRV_NAME
1da177e4
LT
4872 ": Warning: miimon (%d) and arp_interval (%d) "
4873 "can't be used simultaneously, disabling ARP "
4874 "monitoring\n",
4875 miimon, arp_interval);
4876 arp_interval = 0;
4877 }
4878
4879 if ((updelay % miimon) != 0) {
3d632c3f 4880 pr_warning(DRV_NAME
1da177e4
LT
4881 ": Warning: updelay (%d) is not a multiple "
4882 "of miimon (%d), updelay rounded to %d ms\n",
4883 updelay, miimon, (updelay / miimon) * miimon);
4884 }
4885
4886 updelay /= miimon;
4887
4888 if ((downdelay % miimon) != 0) {
3d632c3f 4889 pr_warning(DRV_NAME
1da177e4
LT
4890 ": Warning: downdelay (%d) is not a multiple "
4891 "of miimon (%d), downdelay rounded to %d ms\n",
4892 downdelay, miimon,
4893 (downdelay / miimon) * miimon);
4894 }
4895
4896 downdelay /= miimon;
4897 }
4898
4899 if (arp_interval < 0) {
3d632c3f 4900 pr_warning(DRV_NAME
1da177e4
LT
4901 ": Warning: arp_interval module parameter (%d) "
4902 ", not in range 0-%d, so it was reset to %d\n",
4903 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4904 arp_interval = BOND_LINK_ARP_INTERV;
4905 }
4906
4907 for (arp_ip_count = 0;
4908 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4909 arp_ip_count++) {
4910 /* not complete check, but should be good enough to
4911 catch mistakes */
4912 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
3d632c3f 4913 pr_warning(DRV_NAME
1da177e4
LT
4914 ": Warning: bad arp_ip_target module parameter "
4915 "(%s), ARP monitoring will not be performed\n",
4916 arp_ip_target[arp_ip_count]);
4917 arp_interval = 0;
4918 } else {
d3bb52b0 4919 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT
4920 arp_target[arp_ip_count] = ip;
4921 }
4922 }
4923
4924 if (arp_interval && !arp_ip_count) {
4925 /* don't allow arping if no arp_ip_target given... */
3d632c3f 4926 pr_warning(DRV_NAME
1da177e4
LT
4927 ": Warning: arp_interval module parameter (%d) "
4928 "specified without providing an arp_ip_target "
4929 "parameter, arp_interval was reset to 0\n",
4930 arp_interval);
4931 arp_interval = 0;
4932 }
4933
f5b2b966
JV
4934 if (arp_validate) {
4935 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
3d632c3f
SH
4936 pr_err(DRV_NAME
4937 ": arp_validate only supported in active-backup mode\n");
f5b2b966
JV
4938 return -EINVAL;
4939 }
4940 if (!arp_interval) {
3d632c3f 4941 pr_err(DRV_NAME
f5b2b966
JV
4942 ": arp_validate requires arp_interval\n");
4943 return -EINVAL;
4944 }
4945
4946 arp_validate_value = bond_parse_parm(arp_validate,
4947 arp_validate_tbl);
4948 if (arp_validate_value == -1) {
3d632c3f 4949 pr_err(DRV_NAME
f5b2b966
JV
4950 ": Error: invalid arp_validate \"%s\"\n",
4951 arp_validate == NULL ? "NULL" : arp_validate);
4952 return -EINVAL;
4953 }
4954 } else
4955 arp_validate_value = 0;
4956
1da177e4 4957 if (miimon) {
3d632c3f 4958 pr_info(DRV_NAME
1da177e4
LT
4959 ": MII link monitoring set to %d ms\n",
4960 miimon);
4961 } else if (arp_interval) {
4962 int i;
4963
3d632c3f
SH
4964 pr_info(DRV_NAME ": ARP monitoring set to %d ms,"
4965 " validate %s, with %d target(s):",
f5b2b966
JV
4966 arp_interval,
4967 arp_validate_tbl[arp_validate_value].modename,
4968 arp_ip_count);
1da177e4
LT
4969
4970 for (i = 0; i < arp_ip_count; i++)
e5e2a8fd 4971 pr_info(" %s", arp_ip_target[i]);
1da177e4 4972
e5e2a8fd 4973 pr_info("\n");
1da177e4 4974
b8a9787e 4975 } else if (max_bonds) {
1da177e4
LT
4976 /* miimon and arp_interval not set, we need one so things
4977 * work as expected, see bonding.txt for details
4978 */
3d632c3f 4979 pr_warning(DRV_NAME
1da177e4
LT
4980 ": Warning: either miimon or arp_interval and "
4981 "arp_ip_target module parameters must be specified, "
4982 "otherwise bonding will not detect link failures! see "
4983 "bonding.txt for details.\n");
4984 }
4985
4986 if (primary && !USES_PRIMARY(bond_mode)) {
4987 /* currently, using a primary only makes sense
4988 * in active backup, TLB or ALB modes
4989 */
3d632c3f 4990 pr_warning(DRV_NAME
1da177e4
LT
4991 ": Warning: %s primary device specified but has no "
4992 "effect in %s mode\n",
4993 primary, bond_mode_name(bond_mode));
4994 primary = NULL;
4995 }
4996
3915c1e8
JV
4997 if (fail_over_mac) {
4998 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4999 fail_over_mac_tbl);
5000 if (fail_over_mac_value == -1) {
3d632c3f 5001 pr_err(DRV_NAME
3915c1e8
JV
5002 ": Error: invalid fail_over_mac \"%s\"\n",
5003 arp_validate == NULL ? "NULL" : arp_validate);
5004 return -EINVAL;
5005 }
5006
5007 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
3d632c3f 5008 pr_warning(DRV_NAME
3915c1e8
JV
5009 ": Warning: fail_over_mac only affects "
5010 "active-backup mode.\n");
5011 } else {
5012 fail_over_mac_value = BOND_FOM_NONE;
5013 }
dd957c57 5014
1da177e4
LT
5015 /* fill params struct with the proper values */
5016 params->mode = bond_mode;
169a3e66 5017 params->xmit_policy = xmit_hashtype;
1da177e4 5018 params->miimon = miimon;
7893b249 5019 params->num_grat_arp = num_grat_arp;
305d552a 5020 params->num_unsol_na = num_unsol_na;
1da177e4 5021 params->arp_interval = arp_interval;
f5b2b966 5022 params->arp_validate = arp_validate_value;
1da177e4
LT
5023 params->updelay = updelay;
5024 params->downdelay = downdelay;
5025 params->use_carrier = use_carrier;
5026 params->lacp_fast = lacp_fast;
5027 params->primary[0] = 0;
3915c1e8 5028 params->fail_over_mac = fail_over_mac_value;
1da177e4
LT
5029
5030 if (primary) {
5031 strncpy(params->primary, primary, IFNAMSIZ);
5032 params->primary[IFNAMSIZ - 1] = 0;
5033 }
5034
5035 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5036
5037 return 0;
5038}
5039
0daa2303 5040static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 5041static struct lock_class_key bonding_netdev_addr_lock_key;
0daa2303 5042
e8a0464c
DM
5043static void bond_set_lockdep_class_one(struct net_device *dev,
5044 struct netdev_queue *txq,
5045 void *_unused)
c773e847
DM
5046{
5047 lockdep_set_class(&txq->_xmit_lock,
5048 &bonding_netdev_xmit_lock_key);
5049}
5050
5051static void bond_set_lockdep_class(struct net_device *dev)
5052{
cf508b12
DM
5053 lockdep_set_class(&dev->addr_list_lock,
5054 &bonding_netdev_addr_lock_key);
e8a0464c 5055 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
c773e847
DM
5056}
5057
181470fc
SH
5058/*
5059 * Called from registration process
5060 */
5061static int bond_init(struct net_device *bond_dev)
5062{
5063 struct bonding *bond = netdev_priv(bond_dev);
5064
5065 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5066
5067 bond->wq = create_singlethread_workqueue(bond_dev->name);
5068 if (!bond->wq)
5069 return -ENOMEM;
5070
5071 bond_set_lockdep_class(bond_dev);
5072
5073 netif_carrier_off(bond_dev);
5074
5075 bond_create_proc_entry(bond);
5076 list_add_tail(&bond->bond_list, &bond_dev_list);
5077
5078 return 0;
5079}
5080
dfe60397 5081/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 5082 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW
5083 * Caller must NOT hold rtnl_lock; we need to release it here before we
5084 * set up our sysfs entries.
5085 */
d2991f75 5086int bond_create(const char *name)
dfe60397
MW
5087{
5088 struct net_device *bond_dev;
5089 int res;
5090
5091 rtnl_lock();
027ea041 5092 /* Check to see if the bond already exists. */
373500db
SH
5093 /* FIXME: pass netns from caller */
5094 if (name && __dev_get_by_name(&init_net, name)) {
5095 pr_err(DRV_NAME ": cannot add bond %s; already exists\n",
5096 name);
5097 res = -EEXIST;
5098 goto out_rtnl;
4fe4763c 5099 }
027ea041 5100
e4b91c48 5101 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
181470fc 5102 bond_setup);
dfe60397 5103 if (!bond_dev) {
3d632c3f 5104 pr_err(DRV_NAME ": %s: eek! can't alloc netdev!\n",
dfe60397
MW
5105 name);
5106 res = -ENOMEM;
5107 goto out_rtnl;
5108 }
5109
e4b91c48
JV
5110 if (!name) {
5111 res = dev_alloc_name(bond_dev, "bond%d");
5112 if (res < 0)
5113 goto out_netdev;
5114 }
5115
dfe60397 5116 res = register_netdevice(bond_dev);
3d632c3f 5117 if (res < 0)
dfe60397 5118 goto out_bond;
0daa2303 5119
454d7c9b 5120 res = bond_create_sysfs_entry(netdev_priv(bond_dev));
1363d9b1
JP
5121 if (res < 0)
5122 goto out_unreg;
09c89279 5123
7e083840 5124 rtnl_unlock();
09c89279
JV
5125 return 0;
5126
1363d9b1 5127out_unreg:
1363d9b1 5128 unregister_netdevice(bond_dev);
dfe60397
MW
5129out_bond:
5130 bond_deinit(bond_dev);
5131out_netdev:
5132 free_netdev(bond_dev);
5133out_rtnl:
5134 rtnl_unlock();
dfe60397
MW
5135 return res;
5136}
5137
1da177e4
LT
5138static int __init bonding_init(void)
5139{
1da177e4
LT
5140 int i;
5141 int res;
5142
3d632c3f 5143 pr_info("%s", version);
1da177e4 5144
dfe60397 5145 res = bond_check_params(&bonding_defaults);
3d632c3f 5146 if (res)
dfe60397 5147 goto out;
1da177e4 5148
1da177e4 5149 bond_create_proc_dir();
027ea041 5150
1da177e4 5151 for (i = 0; i < max_bonds; i++) {
d2991f75 5152 res = bond_create(NULL);
dfe60397
MW
5153 if (res)
5154 goto err;
1da177e4
LT
5155 }
5156
b76cdba9
MW
5157 res = bond_create_sysfs();
5158 if (res)
5159 goto err;
5160
1da177e4 5161 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5162 register_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5163 bond_register_ipv6_notifier();
1da177e4 5164
dfe60397
MW
5165 goto out;
5166err:
40abc270 5167 rtnl_lock();
1da177e4 5168 bond_free_all();
1da177e4 5169 rtnl_unlock();
dfe60397 5170out:
1da177e4 5171 return res;
dfe60397 5172
1da177e4
LT
5173}
5174
5175static void __exit bonding_exit(void)
5176{
5177 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5178 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5179 bond_unregister_ipv6_notifier();
1da177e4 5180
ae68c398
PE
5181 bond_destroy_sysfs();
5182
1da177e4
LT
5183 rtnl_lock();
5184 bond_free_all();
5185 rtnl_unlock();
5186}
5187
5188module_init(bonding_init);
5189module_exit(bonding_exit);
5190MODULE_LICENSE("GPL");
5191MODULE_VERSION(DRV_VERSION);
5192MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5193MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");