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Update MAINTAINERS to reflect my (jgarzik's) current efforts.
[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
34//#define BONDING_DEBUG 1
35
1da177e4
LT		 36#include <linux/kernel.h>
37#include <linux/module.h>
1da177e4
LT		 38#include <linux/types.h>
39#include <linux/fcntl.h>
40#include <linux/interrupt.h>
41#include <linux/ptrace.h>
42#include <linux/ioport.h>
43#include <linux/in.h>
169a3e66 44#include <net/ip.h>
1da177e4 45#include <linux/ip.h>
169a3e66
JV		 46#include <linux/tcp.h>
47#include <linux/udp.h>
1da177e4
LT		 48#include <linux/slab.h>
49#include <linux/string.h>
50#include <linux/init.h>
51#include <linux/timer.h>
52#include <linux/socket.h>
53#include <linux/ctype.h>
54#include <linux/inet.h>
55#include <linux/bitops.h>
56#include <asm/system.h>
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/uaccess.h>
60#include <linux/errno.h>
61#include <linux/netdevice.h>
62#include <linux/inetdevice.h>
a816c7c7 63#include <linux/igmp.h>
1da177e4
LT		 64#include <linux/etherdevice.h>
65#include <linux/skbuff.h>
66#include <net/sock.h>
67#include <linux/rtnetlink.h>
68#include <linux/proc_fs.h>
69#include <linux/seq_file.h>
70#include <linux/smp.h>
71#include <linux/if_ether.h>
72#include <net/arp.h>
73#include <linux/mii.h>
74#include <linux/ethtool.h>
75#include <linux/if_vlan.h>
76#include <linux/if_bonding.h>
c3ade5ca 77#include <net/route.h>
457c4cbc 78#include <net/net_namespace.h>
1da177e4
LT		 79#include "bonding.h"
80#include "bond_3ad.h"
81#include "bond_alb.h"
82
83/*---------------------------- Module parameters ----------------------------*/
84
85/* monitor all links that often (in milliseconds). <=0 disables monitoring */
86#define BOND_LINK_MON_INTERV 0
87#define BOND_LINK_ARP_INTERV 0
88
89static int max_bonds = BOND_DEFAULT_MAX_BONDS;
90static int miimon = BOND_LINK_MON_INTERV;
91static int updelay = 0;
92static int downdelay = 0;
93static int use_carrier = 1;
94static char *mode = NULL;
95static char *primary = NULL;
96static char *lacp_rate = NULL;
169a3e66 97static char *xmit_hash_policy = NULL;
1da177e4
LT		 98static int arp_interval = BOND_LINK_ARP_INTERV;
99static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
f5b2b966 100static char *arp_validate = NULL;
dd957c57 101static int fail_over_mac = 0;
12479f9a 102struct bond_params bonding_defaults;
1da177e4
LT		 103
104module_param(max_bonds, int, 0);
105MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
106module_param(miimon, int, 0);
107MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
108module_param(updelay, int, 0);
109MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
110module_param(downdelay, int, 0);
2ac47660
MW		 111MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
112 "in milliseconds");
1da177e4 113module_param(use_carrier, int, 0);
2ac47660
MW		 114MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
115 "0 for off, 1 for on (default)");
1da177e4 116module_param(mode, charp, 0);
2ac47660
MW		 117MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
118 "1 for active-backup, 2 for balance-xor, "
119 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
120 "6 for balance-alb");
1da177e4
LT		 121module_param(primary, charp, 0);
122MODULE_PARM_DESC(primary, "Primary network device to use");
123module_param(lacp_rate, charp, 0);
2ac47660
MW		 124MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
125 "(slow/fast)");
169a3e66 126module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 127MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
128 ", 1 for layer 3+4");
1da177e4
LT		 129module_param(arp_interval, int, 0);
130MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
131module_param_array(arp_ip_target, charp, NULL, 0);
132MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV		 133module_param(arp_validate, charp, 0);
134MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
dd957c57
JV		 135module_param(fail_over_mac, int, 0);
136MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. 0 of off (default), 1 for on.");
1da177e4
LT		 137
138/*----------------------------- Global variables ----------------------------*/
139
f71e1309 140static const char * const version =
1da177e4
LT		 141 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
142
12479f9a 143LIST_HEAD(bond_dev_list);
1da177e4
LT		 144
145#ifdef CONFIG_PROC_FS
146static struct proc_dir_entry *bond_proc_dir = NULL;
147#endif
148
b76cdba9 149extern struct rw_semaphore bonding_rwsem;
d3bb52b0 150static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
1da177e4 151static int arp_ip_count = 0;
1da177e4 152static int bond_mode = BOND_MODE_ROUNDROBIN;
169a3e66 153static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
1da177e4 154static int lacp_fast = 0;
217df670 155
1da177e4 156
12479f9a 157struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 158{ "slow", AD_LACP_SLOW},
159{ "fast", AD_LACP_FAST},
160{ NULL, -1},
161};
162
12479f9a 163struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 164{ "balance-rr", BOND_MODE_ROUNDROBIN},
165{ "active-backup", BOND_MODE_ACTIVEBACKUP},
166{ "balance-xor", BOND_MODE_XOR},
167{ "broadcast", BOND_MODE_BROADCAST},
168{ "802.3ad", BOND_MODE_8023AD},
169{ "balance-tlb", BOND_MODE_TLB},
170{ "balance-alb", BOND_MODE_ALB},
171{ NULL, -1},
172};
173
12479f9a 174struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 175{ "layer2", BOND_XMIT_POLICY_LAYER2},
176{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
177{ NULL, -1},
178};
179
f5b2b966
JV		 180struct bond_parm_tbl arp_validate_tbl[] = {
181{ "none", BOND_ARP_VALIDATE_NONE},
182{ "active", BOND_ARP_VALIDATE_ACTIVE},
183{ "backup", BOND_ARP_VALIDATE_BACKUP},
184{ "all", BOND_ARP_VALIDATE_ALL},
185{ NULL, -1},
186};
187
1da177e4
LT		 188/*-------------------------- Forward declarations ---------------------------*/
189
c3ade5ca 190static void bond_send_gratuitous_arp(struct bonding *bond);
1da177e4
LT		 191
192/*---------------------------- General routines -----------------------------*/
193
4ad072c9 194static const char *bond_mode_name(int mode)
1da177e4
LT		 195{
196 switch (mode) {
197 case BOND_MODE_ROUNDROBIN :
198 return "load balancing (round-robin)";
199 case BOND_MODE_ACTIVEBACKUP :
200 return "fault-tolerance (active-backup)";
201 case BOND_MODE_XOR :
202 return "load balancing (xor)";
203 case BOND_MODE_BROADCAST :
204 return "fault-tolerance (broadcast)";
205 case BOND_MODE_8023AD:
206 return "IEEE 802.3ad Dynamic link aggregation";
207 case BOND_MODE_TLB:
208 return "transmit load balancing";
209 case BOND_MODE_ALB:
210 return "adaptive load balancing";
211 default:
212 return "unknown";
213 }
214}
215
216/*---------------------------------- VLAN -----------------------------------*/
217
218/**
219 * bond_add_vlan - add a new vlan id on bond
220 * @bond: bond that got the notification
221 * @vlan_id: the vlan id to add
222 *
223 * Returns -ENOMEM if allocation failed.
224 */
225static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
226{
227 struct vlan_entry *vlan;
228
229 dprintk("bond: %s, vlan id %d\n",
230 (bond ? bond->dev->name: "None"), vlan_id);
231
232 vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
233 if (!vlan) {
234 return -ENOMEM;
235 }
236
237 INIT_LIST_HEAD(&vlan->vlan_list);
238 vlan->vlan_id = vlan_id;
c3ade5ca 239 vlan->vlan_ip = 0;
1da177e4
LT		 240
241 write_lock_bh(&bond->lock);
242
243 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
244
245 write_unlock_bh(&bond->lock);
246
247 dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
248
249 return 0;
250}
251
252/**
253 * bond_del_vlan - delete a vlan id from bond
254 * @bond: bond that got the notification
255 * @vlan_id: the vlan id to delete
256 *
257 * returns -ENODEV if @vlan_id was not found in @bond.
258 */
259static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
260{
261 struct vlan_entry *vlan, *next;
262 int res = -ENODEV;
263
264 dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
265
266 write_lock_bh(&bond->lock);
267
268 list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) {
269 if (vlan->vlan_id == vlan_id) {
270 list_del(&vlan->vlan_list);
271
272 if ((bond->params.mode == BOND_MODE_TLB) ||
273 (bond->params.mode == BOND_MODE_ALB)) {
274 bond_alb_clear_vlan(bond, vlan_id);
275 }
276
277 dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
278 bond->dev->name);
279
280 kfree(vlan);
281
282 if (list_empty(&bond->vlan_list) &&
283 (bond->slave_cnt == 0)) {
284 /* Last VLAN removed and no slaves, so
285 * restore block on adding VLANs. This will
286 * be removed once new slaves that are not
287 * VLAN challenged will be added.
288 */
289 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
290 }
291
292 res = 0;
293 goto out;
294 }
295 }
296
297 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
298 bond->dev->name);
299
300out:
301 write_unlock_bh(&bond->lock);
302 return res;
303}
304
305/**
306 * bond_has_challenged_slaves
307 * @bond: the bond we're working on
308 *
309 * Searches the slave list. Returns 1 if a vlan challenged slave
310 * was found, 0 otherwise.
311 *
312 * Assumes bond->lock is held.
313 */
314static int bond_has_challenged_slaves(struct bonding *bond)
315{
316 struct slave *slave;
317 int i;
318
319 bond_for_each_slave(bond, slave, i) {
320 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
321 dprintk("found VLAN challenged slave - %s\n",
322 slave->dev->name);
323 return 1;
324 }
325 }
326
327 dprintk("no VLAN challenged slaves found\n");
328 return 0;
329}
330
331/**
332 * bond_next_vlan - safely skip to the next item in the vlans list.
333 * @bond: the bond we're working on
334 * @curr: item we're advancing from
335 *
336 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
337 * or @curr->next otherwise (even if it is @curr itself again).
338 *
339 * Caller must hold bond->lock
340 */
341struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
342{
343 struct vlan_entry *next, *last;
344
345 if (list_empty(&bond->vlan_list)) {
346 return NULL;
347 }
348
349 if (!curr) {
350 next = list_entry(bond->vlan_list.next,
351 struct vlan_entry, vlan_list);
352 } else {
353 last = list_entry(bond->vlan_list.prev,
354 struct vlan_entry, vlan_list);
355 if (last == curr) {
356 next = list_entry(bond->vlan_list.next,
357 struct vlan_entry, vlan_list);
358 } else {
359 next = list_entry(curr->vlan_list.next,
360 struct vlan_entry, vlan_list);
361 }
362 }
363
364 return next;
365}
366
367/**
368 * bond_dev_queue_xmit - Prepare skb for xmit.
369 *
370 * @bond: bond device that got this skb for tx.
371 * @skb: hw accel VLAN tagged skb to transmit
372 * @slave_dev: slave that is supposed to xmit this skbuff
373 *
374 * When the bond gets an skb to transmit that is
375 * already hardware accelerated VLAN tagged, and it
376 * needs to relay this skb to a slave that is not
377 * hw accel capable, the skb needs to be "unaccelerated",
378 * i.e. strip the hwaccel tag and re-insert it as part
379 * of the payload.
380 */
381int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
382{
383 unsigned short vlan_id;
384
385 if (!list_empty(&bond->vlan_list) &&
386 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
387 vlan_get_tag(skb, &vlan_id) == 0) {
388 skb->dev = slave_dev;
389 skb = vlan_put_tag(skb, vlan_id);
390 if (!skb) {
391 /* vlan_put_tag() frees the skb in case of error,
392 * so return success here so the calling functions
393 * won't attempt to free is again.
394 */
395 return 0;
396 }
397 } else {
398 skb->dev = slave_dev;
399 }
400
401 skb->priority = 1;
402 dev_queue_xmit(skb);
403
404 return 0;
405}
406
407/*
408 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
409 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
410 * lock because:
411 * a. This operation is performed in IOCTL context,
412 * b. The operation is protected by the RTNL semaphore in the 8021q code,
413 * c. Holding a lock with BH disabled while directly calling a base driver
414 * entry point is generally a BAD idea.
415 *
416 * The design of synchronization/protection for this operation in the 8021q
417 * module is good for one or more VLAN devices over a single physical device
418 * and cannot be extended for a teaming solution like bonding, so there is a
419 * potential race condition here where a net device from the vlan group might
420 * be referenced (either by a base driver or the 8021q code) while it is being
421 * removed from the system. However, it turns out we're not making matters
422 * worse, and if it works for regular VLAN usage it will work here too.
423*/
424
425/**
426 * bond_vlan_rx_register - Propagates registration to slaves
427 * @bond_dev: bonding net device that got called
428 * @grp: vlan group being registered
429 */
430static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
431{
432 struct bonding *bond = bond_dev->priv;
433 struct slave *slave;
434 int i;
435
436 bond->vlgrp = grp;
437
438 bond_for_each_slave(bond, slave, i) {
439 struct net_device *slave_dev = slave->dev;
440
441 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
442 slave_dev->vlan_rx_register) {
443 slave_dev->vlan_rx_register(slave_dev, grp);
444 }
445 }
446}
447
448/**
449 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
450 * @bond_dev: bonding net device that got called
451 * @vid: vlan id being added
452 */
453static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
454{
455 struct bonding *bond = bond_dev->priv;
456 struct slave *slave;
457 int i, res;
458
459 bond_for_each_slave(bond, slave, i) {
460 struct net_device *slave_dev = slave->dev;
461
462 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
463 slave_dev->vlan_rx_add_vid) {
464 slave_dev->vlan_rx_add_vid(slave_dev, vid);
465 }
466 }
467
468 res = bond_add_vlan(bond, vid);
469 if (res) {
470 printk(KERN_ERR DRV_NAME
4e0952c7 471 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 472 bond_dev->name, vid);
473 }
474}
475
476/**
477 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
478 * @bond_dev: bonding net device that got called
479 * @vid: vlan id being removed
480 */
481static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
482{
483 struct bonding *bond = bond_dev->priv;
484 struct slave *slave;
485 struct net_device *vlan_dev;
486 int i, res;
487
488 bond_for_each_slave(bond, slave, i) {
489 struct net_device *slave_dev = slave->dev;
490
491 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
492 slave_dev->vlan_rx_kill_vid) {
493 /* Save and then restore vlan_dev in the grp array,
494 * since the slave's driver might clear it.
495 */
5c15bdec 496 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
1da177e4 497 slave_dev->vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 498 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT		 499 }
500 }
501
502 res = bond_del_vlan(bond, vid);
503 if (res) {
504 printk(KERN_ERR DRV_NAME
4e0952c7 505 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 506 bond_dev->name, vid);
507 }
508}
509
510static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
511{
512 struct vlan_entry *vlan;
513
514 write_lock_bh(&bond->lock);
515
516 if (list_empty(&bond->vlan_list)) {
517 goto out;
518 }
519
520 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
521 slave_dev->vlan_rx_register) {
522 slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
523 }
524
525 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
526 !(slave_dev->vlan_rx_add_vid)) {
527 goto out;
528 }
529
530 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
531 slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
532 }
533
534out:
535 write_unlock_bh(&bond->lock);
536}
537
538static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
539{
540 struct vlan_entry *vlan;
541 struct net_device *vlan_dev;
542
543 write_lock_bh(&bond->lock);
544
545 if (list_empty(&bond->vlan_list)) {
546 goto out;
547 }
548
549 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
550 !(slave_dev->vlan_rx_kill_vid)) {
551 goto unreg;
552 }
553
554 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
555 /* Save and then restore vlan_dev in the grp array,
556 * since the slave's driver might clear it.
557 */
5c15bdec 558 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
1da177e4 559 slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 560 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT		 561 }
562
563unreg:
564 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
565 slave_dev->vlan_rx_register) {
566 slave_dev->vlan_rx_register(slave_dev, NULL);
567 }
568
569out:
570 write_unlock_bh(&bond->lock);
571}
572
573/*------------------------------- Link status -------------------------------*/
574
ff59c456
JV		 575/*
576 * Set the carrier state for the master according to the state of its
577 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
578 * do special 802.3ad magic.
579 *
580 * Returns zero if carrier state does not change, nonzero if it does.
581 */
582static int bond_set_carrier(struct bonding *bond)
583{
584 struct slave *slave;
585 int i;
586
587 if (bond->slave_cnt == 0)
588 goto down;
589
590 if (bond->params.mode == BOND_MODE_8023AD)
591 return bond_3ad_set_carrier(bond);
592
593 bond_for_each_slave(bond, slave, i) {
594 if (slave->link == BOND_LINK_UP) {
595 if (!netif_carrier_ok(bond->dev)) {
596 netif_carrier_on(bond->dev);
597 return 1;
598 }
599 return 0;
600 }
601 }
602
603down:
604 if (netif_carrier_ok(bond->dev)) {
605 netif_carrier_off(bond->dev);
606 return 1;
607 }
608 return 0;
609}
610
1da177e4
LT		 611/*
612 * Get link speed and duplex from the slave's base driver
613 * using ethtool. If for some reason the call fails or the
614 * values are invalid, fake speed and duplex to 100/Full
615 * and return error.
616 */
617static int bond_update_speed_duplex(struct slave *slave)
618{
619 struct net_device *slave_dev = slave->dev;
1da177e4 620 struct ethtool_cmd etool;
61a44b9c 621 int res;
1da177e4
LT		 622
623 /* Fake speed and duplex */
624 slave->speed = SPEED_100;
625 slave->duplex = DUPLEX_FULL;
626
61a44b9c
MW		 627 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
628 return -1;
1da177e4 629
61a44b9c
MW		 630 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
631 if (res < 0)
1da177e4 632 return -1;
1da177e4 633
1da177e4
LT		 634 switch (etool.speed) {
635 case SPEED_10:
636 case SPEED_100:
637 case SPEED_1000:
94dbffd5 638 case SPEED_10000:
1da177e4
LT		 639 break;
640 default:
641 return -1;
642 }
643
644 switch (etool.duplex) {
645 case DUPLEX_FULL:
646 case DUPLEX_HALF:
647 break;
648 default:
649 return -1;
650 }
651
652 slave->speed = etool.speed;
653 slave->duplex = etool.duplex;
654
655 return 0;
656}
657
658/*
659 * if <dev> supports MII link status reporting, check its link status.
660 *
661 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
662 * depening upon the setting of the use_carrier parameter.
663 *
664 * Return either BMSR_LSTATUS, meaning that the link is up (or we
665 * can't tell and just pretend it is), or 0, meaning that the link is
666 * down.
667 *
668 * If reporting is non-zero, instead of faking link up, return -1 if
669 * both ETHTOOL and MII ioctls fail (meaning the device does not
670 * support them). If use_carrier is set, return whatever it says.
671 * It'd be nice if there was a good way to tell if a driver supports
672 * netif_carrier, but there really isn't.
673 */
674static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
675{
676 static int (* ioctl)(struct net_device *, struct ifreq *, int);
677 struct ifreq ifr;
678 struct mii_ioctl_data *mii;
1da177e4
LT		 679
680 if (bond->params.use_carrier) {
681 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
682 }
683
684 ioctl = slave_dev->do_ioctl;
685 if (ioctl) {
686 /* TODO: set pointer to correct ioctl on a per team member */
687 /* bases to make this more efficient. that is, once */
688 /* we determine the correct ioctl, we will always */
689 /* call it and not the others for that team */
690 /* member. */
691
692 /*
693 * We cannot assume that SIOCGMIIPHY will also read a
694 * register; not all network drivers (e.g., e100)
695 * support that.
696 */
697
698 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
699 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
700 mii = if_mii(&ifr);
701 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
702 mii->reg_num = MII_BMSR;
703 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
704 return (mii->val_out & BMSR_LSTATUS);
705 }
706 }
707 }
708
61a44b9c
MW		 709 /*
710 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
711 * attempt to get link status from it if the above MII ioctls fail.
712 */
1da177e4
LT		 713 if (slave_dev->ethtool_ops) {
714 if (slave_dev->ethtool_ops->get_link) {
715 u32 link;
716
717 link = slave_dev->ethtool_ops->get_link(slave_dev);
718
719 return link ? BMSR_LSTATUS : 0;
720 }
721 }
722
1da177e4
LT		 723 /*
724 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 725 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT		 726 * cannot report link status). If not reporting, pretend
727 * we're ok.
728 */
729 return (reporting ? -1 : BMSR_LSTATUS);
730}
731
732/*----------------------------- Multicast list ------------------------------*/
733
734/*
735 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
736 */
737static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
738{
739 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
740 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
741}
742
743/*
744 * returns dmi entry if found, NULL otherwise
745 */
746static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
747{
748 struct dev_mc_list *idmi;
749
750 for (idmi = mc_list; idmi; idmi = idmi->next) {
751 if (bond_is_dmi_same(dmi, idmi)) {
752 return idmi;
753 }
754 }
755
756 return NULL;
757}
758
759/*
760 * Push the promiscuity flag down to appropriate slaves
761 */
762static void bond_set_promiscuity(struct bonding *bond, int inc)
763{
764 if (USES_PRIMARY(bond->params.mode)) {
765 /* write lock already acquired */
766 if (bond->curr_active_slave) {
767 dev_set_promiscuity(bond->curr_active_slave->dev, inc);
768 }
769 } else {
770 struct slave *slave;
771 int i;
772 bond_for_each_slave(bond, slave, i) {
773 dev_set_promiscuity(slave->dev, inc);
774 }
775 }
776}
777
778/*
779 * Push the allmulti flag down to all slaves
780 */
781static void bond_set_allmulti(struct bonding *bond, int inc)
782{
783 if (USES_PRIMARY(bond->params.mode)) {
784 /* write lock already acquired */
785 if (bond->curr_active_slave) {
786 dev_set_allmulti(bond->curr_active_slave->dev, inc);
787 }
788 } else {
789 struct slave *slave;
790 int i;
791 bond_for_each_slave(bond, slave, i) {
792 dev_set_allmulti(slave->dev, inc);
793 }
794 }
795}
796
797/*
798 * Add a Multicast address to slaves
799 * according to mode
800 */
801static void bond_mc_add(struct bonding *bond, void *addr, int alen)
802{
803 if (USES_PRIMARY(bond->params.mode)) {
804 /* write lock already acquired */
805 if (bond->curr_active_slave) {
806 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
807 }
808 } else {
809 struct slave *slave;
810 int i;
811 bond_for_each_slave(bond, slave, i) {
812 dev_mc_add(slave->dev, addr, alen, 0);
813 }
814 }
815}
816
817/*
818 * Remove a multicast address from slave
819 * according to mode
820 */
821static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
822{
823 if (USES_PRIMARY(bond->params.mode)) {
824 /* write lock already acquired */
825 if (bond->curr_active_slave) {
826 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
827 }
828 } else {
829 struct slave *slave;
830 int i;
831 bond_for_each_slave(bond, slave, i) {
832 dev_mc_delete(slave->dev, addr, alen, 0);
833 }
834 }
835}
836
a816c7c7
JV		 837
838/*
839 * Retrieve the list of registered multicast addresses for the bonding
840 * device and retransmit an IGMP JOIN request to the current active
841 * slave.
842 */
843static void bond_resend_igmp_join_requests(struct bonding *bond)
844{
845 struct in_device *in_dev;
846 struct ip_mc_list *im;
847
848 rcu_read_lock();
849 in_dev = __in_dev_get_rcu(bond->dev);
850 if (in_dev) {
851 for (im = in_dev->mc_list; im; im = im->next) {
852 ip_mc_rejoin_group(im);
853 }
854 }
855
856 rcu_read_unlock();
857}
858
1da177e4
LT		 859/*
860 * Totally destroys the mc_list in bond
861 */
862static void bond_mc_list_destroy(struct bonding *bond)
863{
864 struct dev_mc_list *dmi;
865
866 dmi = bond->mc_list;
867 while (dmi) {
868 bond->mc_list = dmi->next;
869 kfree(dmi);
870 dmi = bond->mc_list;
871 }
a816c7c7 872 bond->mc_list = NULL;
1da177e4
LT		 873}
874
875/*
876 * Copy all the Multicast addresses from src to the bonding device dst
877 */
de54f390 878static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 879 gfp_t gfp_flag)
1da177e4
LT		 880{
881 struct dev_mc_list *dmi, *new_dmi;
882
883 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 884 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT		 885
886 if (!new_dmi) {
887 /* FIXME: Potential memory leak !!! */
888 return -ENOMEM;
889 }
890
891 new_dmi->next = bond->mc_list;
892 bond->mc_list = new_dmi;
893 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
894 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
895 new_dmi->dmi_users = dmi->dmi_users;
896 new_dmi->dmi_gusers = dmi->dmi_gusers;
897 }
898
899 return 0;
900}
901
902/*
903 * flush all members of flush->mc_list from device dev->mc_list
904 */
905static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
906{
907 struct bonding *bond = bond_dev->priv;
908 struct dev_mc_list *dmi;
909
910 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
911 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
912 }
913
914 if (bond->params.mode == BOND_MODE_8023AD) {
915 /* del lacpdu mc addr from mc list */
916 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
917
918 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
919 }
920}
921
922/*--------------------------- Active slave change ---------------------------*/
923
924/*
925 * Update the mc list and multicast-related flags for the new and
926 * old active slaves (if any) according to the multicast mode, and
927 * promiscuous flags unconditionally.
928 */
929static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
930{
931 struct dev_mc_list *dmi;
932
933 if (!USES_PRIMARY(bond->params.mode)) {
934 /* nothing to do - mc list is already up-to-date on
935 * all slaves
936 */
937 return;
938 }
939
940 if (old_active) {
941 if (bond->dev->flags & IFF_PROMISC) {
942 dev_set_promiscuity(old_active->dev, -1);
943 }
944
945 if (bond->dev->flags & IFF_ALLMULTI) {
946 dev_set_allmulti(old_active->dev, -1);
947 }
948
949 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
950 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
951 }
952 }
953
954 if (new_active) {
955 if (bond->dev->flags & IFF_PROMISC) {
956 dev_set_promiscuity(new_active->dev, 1);
957 }
958
959 if (bond->dev->flags & IFF_ALLMULTI) {
960 dev_set_allmulti(new_active->dev, 1);
961 }
962
963 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
964 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
965 }
a816c7c7 966 bond_resend_igmp_join_requests(bond);
1da177e4
LT		 967 }
968}
969
970/**
971 * find_best_interface - select the best available slave to be the active one
972 * @bond: our bonding struct
973 *
974 * Warning: Caller must hold curr_slave_lock for writing.
975 */
976static struct slave *bond_find_best_slave(struct bonding *bond)
977{
978 struct slave *new_active, *old_active;
979 struct slave *bestslave = NULL;
980 int mintime = bond->params.updelay;
981 int i;
982
983 new_active = old_active = bond->curr_active_slave;
984
985 if (!new_active) { /* there were no active slaves left */
986 if (bond->slave_cnt > 0) { /* found one slave */
987 new_active = bond->first_slave;
988 } else {
989 return NULL; /* still no slave, return NULL */
990 }
991 }
992
993 /* first try the primary link; if arping, a link must tx/rx traffic
994 * before it can be considered the curr_active_slave - also, we would skip
995 * slaves between the curr_active_slave and primary_slave that may be up
996 * and able to arp
997 */
998 if ((bond->primary_slave) &&
999 (!bond->params.arp_interval) &&
1000 (IS_UP(bond->primary_slave->dev))) {
1001 new_active = bond->primary_slave;
1002 }
1003
1004 /* remember where to stop iterating over the slaves */
1005 old_active = new_active;
1006
1007 bond_for_each_slave_from(bond, new_active, i, old_active) {
1008 if (IS_UP(new_active->dev)) {
1009 if (new_active->link == BOND_LINK_UP) {
1010 return new_active;
1011 } else if (new_active->link == BOND_LINK_BACK) {
1012 /* link up, but waiting for stabilization */
1013 if (new_active->delay < mintime) {
1014 mintime = new_active->delay;
1015 bestslave = new_active;
1016 }
1017 }
1018 }
1019 }
1020
1021 return bestslave;
1022}
1023
1024/**
1025 * change_active_interface - change the active slave into the specified one
1026 * @bond: our bonding struct
1027 * @new: the new slave to make the active one
1028 *
1029 * Set the new slave to the bond's settings and unset them on the old
1030 * curr_active_slave.
1031 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1032 *
1033 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1034 * because it is apparently the best available slave we have, even though its
1035 * updelay hasn't timed out yet.
1036 *
1037 * Warning: Caller must hold curr_slave_lock for writing.
1038 */
a77b5325 1039void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1040{
1041 struct slave *old_active = bond->curr_active_slave;
1042
1043 if (old_active == new_active) {
1044 return;
1045 }
1046
1047 if (new_active) {
1048 if (new_active->link == BOND_LINK_BACK) {
1049 if (USES_PRIMARY(bond->params.mode)) {
1050 printk(KERN_INFO DRV_NAME
1051 ": %s: making interface %s the new "
1052 "active one %d ms earlier.\n",
1053 bond->dev->name, new_active->dev->name,
1054 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1055 }
1056
1057 new_active->delay = 0;
1058 new_active->link = BOND_LINK_UP;
1059 new_active->jiffies = jiffies;
1060
1061 if (bond->params.mode == BOND_MODE_8023AD) {
1062 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1063 }
1064
1065 if ((bond->params.mode == BOND_MODE_TLB) ||
1066 (bond->params.mode == BOND_MODE_ALB)) {
1067 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1068 }
1069 } else {
1070 if (USES_PRIMARY(bond->params.mode)) {
1071 printk(KERN_INFO DRV_NAME
1072 ": %s: making interface %s the new "
1073 "active one.\n",
1074 bond->dev->name, new_active->dev->name);
1075 }
1076 }
1077 }
1078
1da177e4
LT		 1079 if (USES_PRIMARY(bond->params.mode)) {
1080 bond_mc_swap(bond, new_active, old_active);
1081 }
1082
1083 if ((bond->params.mode == BOND_MODE_TLB) ||
1084 (bond->params.mode == BOND_MODE_ALB)) {
1085 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1086 if (old_active)
1087 bond_set_slave_inactive_flags(old_active);
1088 if (new_active)
1089 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1090 } else {
1091 bond->curr_active_slave = new_active;
1092 }
c3ade5ca
JV		 1093
1094 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1095 if (old_active) {
1096 bond_set_slave_inactive_flags(old_active);
1097 }
1098
1099 if (new_active) {
1100 bond_set_slave_active_flags(new_active);
1101 }
2ab82852
MS		 1102
1103 /* when bonding does not set the slave MAC address, the bond MAC
1104 * address is the one of the active slave.
1105 */
dd957c57 1106 if (new_active && bond->params.fail_over_mac)
2ab82852
MS		 1107 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1108 new_active->dev->addr_len);
1053f62c
MS		 1109 if (bond->curr_active_slave &&
1110 test_bit(__LINK_STATE_LINKWATCH_PENDING,
1111 &bond->curr_active_slave->dev->state)) {
1112 dprintk("delaying gratuitous arp on %s\n",
1113 bond->curr_active_slave->dev->name);
1114 bond->send_grat_arp = 1;
1115 } else
1116 bond_send_gratuitous_arp(bond);
c3ade5ca 1117 }
1da177e4
LT		 1118}
1119
1120/**
1121 * bond_select_active_slave - select a new active slave, if needed
1122 * @bond: our bonding struct
1123 *
1124 * This functions shoud be called when one of the following occurs:
1125 * - The old curr_active_slave has been released or lost its link.
1126 * - The primary_slave has got its link back.
1127 * - A slave has got its link back and there's no old curr_active_slave.
1128 *
1129 * Warning: Caller must hold curr_slave_lock for writing.
1130 */
a77b5325 1131void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1132{
1133 struct slave *best_slave;
ff59c456 1134 int rv;
1da177e4
LT		 1135
1136 best_slave = bond_find_best_slave(bond);
1137 if (best_slave != bond->curr_active_slave) {
1138 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1139 rv = bond_set_carrier(bond);
1140 if (!rv)
1141 return;
1142
1143 if (netif_carrier_ok(bond->dev)) {
1144 printk(KERN_INFO DRV_NAME
1145 ": %s: first active interface up!\n",
1146 bond->dev->name);
1147 } else {
1148 printk(KERN_INFO DRV_NAME ": %s: "
1149 "now running without any active interface !\n",
1150 bond->dev->name);
1151 }
1da177e4
LT		 1152 }
1153}
1154
1155/*--------------------------- slave list handling ---------------------------*/
1156
1157/*
1158 * This function attaches the slave to the end of list.
1159 *
1160 * bond->lock held for writing by caller.
1161 */
1162static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1163{
1164 if (bond->first_slave == NULL) { /* attaching the first slave */
1165 new_slave->next = new_slave;
1166 new_slave->prev = new_slave;
1167 bond->first_slave = new_slave;
1168 } else {
1169 new_slave->next = bond->first_slave;
1170 new_slave->prev = bond->first_slave->prev;
1171 new_slave->next->prev = new_slave;
1172 new_slave->prev->next = new_slave;
1173 }
1174
1175 bond->slave_cnt++;
1176}
1177
1178/*
1179 * This function detaches the slave from the list.
1180 * WARNING: no check is made to verify if the slave effectively
1181 * belongs to <bond>.
1182 * Nothing is freed on return, structures are just unchained.
1183 * If any slave pointer in bond was pointing to <slave>,
1184 * it should be changed by the calling function.
1185 *
1186 * bond->lock held for writing by caller.
1187 */
1188static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1189{
1190 if (slave->next) {
1191 slave->next->prev = slave->prev;
1192 }
1193
1194 if (slave->prev) {
1195 slave->prev->next = slave->next;
1196 }
1197
1198 if (bond->first_slave == slave) { /* slave is the first slave */
1199 if (bond->slave_cnt > 1) { /* there are more slave */
1200 bond->first_slave = slave->next;
1201 } else {
1202 bond->first_slave = NULL; /* slave was the last one */
1203 }
1204 }
1205
1206 slave->next = NULL;
1207 slave->prev = NULL;
1208 bond->slave_cnt--;
1209}
1210
1211/*---------------------------------- IOCTL ----------------------------------*/
1212
4ad072c9
AB		 1213static int bond_sethwaddr(struct net_device *bond_dev,
1214 struct net_device *slave_dev)
1da177e4
LT		 1215{
1216 dprintk("bond_dev=%p\n", bond_dev);
1217 dprintk("slave_dev=%p\n", slave_dev);
1218 dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1219 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1220 return 0;
1221}
1222
7f353bf2
HX		 1223#define BOND_VLAN_FEATURES \
1224 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1225 NETIF_F_HW_VLAN_FILTER)
8531c5ff
AK		 1226
1227/*
8e3babcd 1228 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX		 1229 * feature bits are managed elsewhere, so preserve those feature bits
1230 * on the master device.
8531c5ff
AK		 1231 */
1232static int bond_compute_features(struct bonding *bond)
1233{
8531c5ff
AK		 1234 struct slave *slave;
1235 struct net_device *bond_dev = bond->dev;
7f353bf2 1236 unsigned long features = bond_dev->features;
3158bf7d
MS		 1237 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1238 bond_dev->hard_header_len);
8e3babcd 1239 int i;
8531c5ff 1240
7f353bf2
HX		 1241 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1242 features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
1243 NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1244
54ef3137 1245 bond_for_each_slave(bond, slave, i) {
7f353bf2
HX		 1246 features = netdev_compute_features(features,
1247 slave->dev->features);
54ef3137
JV		 1248 if (slave->dev->hard_header_len > max_hard_header_len)
1249 max_hard_header_len = slave->dev->hard_header_len;
1250 }
8531c5ff 1251
7f353bf2 1252 features |= (bond_dev->features & BOND_VLAN_FEATURES);
8531c5ff 1253 bond_dev->features = features;
54ef3137 1254 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1255
1256 return 0;
1257}
1258
872254dd
MS		 1259
1260static void bond_setup_by_slave(struct net_device *bond_dev,
1261 struct net_device *slave_dev)
1262{
d90a162a
MS		 1263 struct bonding *bond = bond_dev->priv;
1264
872254dd 1265 bond_dev->neigh_setup = slave_dev->neigh_setup;
1284cd3a 1266 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1267
1268 bond_dev->type = slave_dev->type;
1269 bond_dev->hard_header_len = slave_dev->hard_header_len;
1270 bond_dev->addr_len = slave_dev->addr_len;
1271
1272 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1273 slave_dev->addr_len);
d90a162a 1274 bond->setup_by_slave = 1;
872254dd
MS		 1275}
1276
1da177e4 1277/* enslave device <slave> to bond device <master> */
a77b5325 1278int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1279{
1280 struct bonding *bond = bond_dev->priv;
1281 struct slave *new_slave = NULL;
1282 struct dev_mc_list *dmi;
1283 struct sockaddr addr;
1284 int link_reporting;
1285 int old_features = bond_dev->features;
1286 int res = 0;
1287
552709d5 1288 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1289 slave_dev->do_ioctl == NULL) {
1da177e4 1290 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1291 ": %s: Warning: no link monitoring support for %s\n",
1292 bond_dev->name, slave_dev->name);
1da177e4
LT		 1293 }
1294
1295 /* bond must be initialized by bond_open() before enslaving */
1296 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1297 printk(KERN_WARNING DRV_NAME
1298 " %s: master_dev is not up in bond_enslave\n",
1299 bond_dev->name);
1da177e4
LT		 1300 }
1301
1302 /* already enslaved */
1303 if (slave_dev->flags & IFF_SLAVE) {
1304 dprintk("Error, Device was already enslaved\n");
1305 return -EBUSY;
1306 }
1307
1308 /* vlan challenged mutual exclusion */
1309 /* no need to lock since we're protected by rtnl_lock */
1310 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1311 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1312 if (!list_empty(&bond->vlan_list)) {
1313 printk(KERN_ERR DRV_NAME
4e0952c7 1314 ": %s: Error: cannot enslave VLAN "
1da177e4 1315 "challenged slave %s on VLAN enabled "
4e0952c7 1316 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1317 bond_dev->name);
1318 return -EPERM;
1319 } else {
1320 printk(KERN_WARNING DRV_NAME
4e0952c7 1321 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1322 "slave %s. Adding VLANs will be blocked as "
1323 "long as %s is part of bond %s\n",
4e0952c7 1324 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1325 bond_dev->name);
1326 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1327 }
1328 } else {
1329 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1330 if (bond->slave_cnt == 0) {
1331 /* First slave, and it is not VLAN challenged,
1332 * so remove the block of adding VLANs over the bond.
1333 */
1334 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1335 }
1336 }
1337
217df670
JV		 1338 /*
1339 * Old ifenslave binaries are no longer supported. These can
1340 * be identified with moderate accurary by the state of the slave:
1341 * the current ifenslave will set the interface down prior to
1342 * enslaving it; the old ifenslave will not.
1343 */
1344 if ((slave_dev->flags & IFF_UP)) {
1345 printk(KERN_ERR DRV_NAME ": %s is up. "
1346 "This may be due to an out of date ifenslave.\n",
1347 slave_dev->name);
1348 res = -EPERM;
1349 goto err_undo_flags;
1350 }
1da177e4 1351
872254dd
MS		 1352 /* set bonding device ether type by slave - bonding netdevices are
1353 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1354 * there is a need to override some of the type dependent attribs/funcs.
1355 *
1356 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1357 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1358 */
1359 if (bond->slave_cnt == 0) {
1360 if (slave_dev->type != ARPHRD_ETHER)
1361 bond_setup_by_slave(bond_dev, slave_dev);
1362 } else if (bond_dev->type != slave_dev->type) {
1363 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1364 "from other slaves (%d), can not enslave it.\n",
1365 slave_dev->name,
1366 slave_dev->type, bond_dev->type);
1367 res = -EINVAL;
1368 goto err_undo_flags;
1369 }
1370
217df670 1371 if (slave_dev->set_mac_address == NULL) {
2ab82852
MS		 1372 if (bond->slave_cnt == 0) {
1373 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1374 ": %s: Warning: The first slave device "
1375 "specified does not support setting the MAC "
1376 "address. Enabling the fail_over_mac option.",
1377 bond_dev->name);
1378 bond->params.fail_over_mac = 1;
1379 } else if (!bond->params.fail_over_mac) {
2ab82852 1380 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1381 ": %s: Error: The slave device specified "
1382 "does not support setting the MAC address, "
1383 "but fail_over_mac is not enabled.\n"
2ab82852
MS		 1384 , bond_dev->name);
1385 res = -EOPNOTSUPP;
1386 goto err_undo_flags;
1387 }
1da177e4
LT		 1388 }
1389
243cb4e5 1390 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1391 if (!new_slave) {
1392 res = -ENOMEM;
1393 goto err_undo_flags;
1394 }
1395
1da177e4
LT		 1396 /* save slave's original flags before calling
1397 * netdev_set_master and dev_open
1398 */
1399 new_slave->original_flags = slave_dev->flags;
1400
217df670
JV		 1401 /*
1402 * Save slave's original ("permanent") mac address for modes
1403 * that need it, and for restoring it upon release, and then
1404 * set it to the master's address
1405 */
1406 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1407
dd957c57 1408 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1409 /*
1410 * Set slave to master's mac address. The application already
1411 * set the master's mac address to that of the first slave
1412 */
1413 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1414 addr.sa_family = slave_dev->type;
1415 res = dev_set_mac_address(slave_dev, &addr);
1416 if (res) {
1417 dprintk("Error %d calling set_mac_address\n", res);
1418 goto err_free;
1419 }
217df670 1420 }
1da177e4 1421
c2edacf8
JV		 1422 res = netdev_set_master(slave_dev, bond_dev);
1423 if (res) {
1424 dprintk("Error %d calling netdev_set_master\n", res);
1425 goto err_close;
1426 }
217df670
JV		 1427 /* open the slave since the application closed it */
1428 res = dev_open(slave_dev);
1429 if (res) {
1430 dprintk("Openning slave %s failed\n", slave_dev->name);
1431 goto err_restore_mac;
1da177e4
LT		 1432 }
1433
1da177e4 1434 new_slave->dev = slave_dev;
0b680e75 1435 slave_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 1436
1437 if ((bond->params.mode == BOND_MODE_TLB) ||
1438 (bond->params.mode == BOND_MODE_ALB)) {
1439 /* bond_alb_init_slave() must be called before all other stages since
1440 * it might fail and we do not want to have to undo everything
1441 */
1442 res = bond_alb_init_slave(bond, new_slave);
1443 if (res) {
1444 goto err_unset_master;
1445 }
1446 }
1447
1448 /* If the mode USES_PRIMARY, then the new slave gets the
1449 * master's promisc (and mc) settings only if it becomes the
1450 * curr_active_slave, and that is taken care of later when calling
1451 * bond_change_active()
1452 */
1453 if (!USES_PRIMARY(bond->params.mode)) {
1454 /* set promiscuity level to new slave */
1455 if (bond_dev->flags & IFF_PROMISC) {
1456 dev_set_promiscuity(slave_dev, 1);
1457 }
1458
1459 /* set allmulti level to new slave */
1460 if (bond_dev->flags & IFF_ALLMULTI) {
1461 dev_set_allmulti(slave_dev, 1);
1462 }
1463
1464 /* upload master's mc_list to new slave */
1465 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1466 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1467 }
1468 }
1469
1470 if (bond->params.mode == BOND_MODE_8023AD) {
1471 /* add lacpdu mc addr to mc list */
1472 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1473
1474 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1475 }
1476
1477 bond_add_vlans_on_slave(bond, slave_dev);
1478
1479 write_lock_bh(&bond->lock);
1480
1481 bond_attach_slave(bond, new_slave);
1482
1483 new_slave->delay = 0;
1484 new_slave->link_failure_count = 0;
1485
8531c5ff
AK		 1486 bond_compute_features(bond);
1487
f5b2b966
JV		 1488 new_slave->last_arp_rx = jiffies;
1489
1da177e4
LT		 1490 if (bond->params.miimon && !bond->params.use_carrier) {
1491 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1492
1493 if ((link_reporting == -1) && !bond->params.arp_interval) {
1494 /*
1495 * miimon is set but a bonded network driver
1496 * does not support ETHTOOL/MII and
1497 * arp_interval is not set. Note: if
1498 * use_carrier is enabled, we will never go
1499 * here (because netif_carrier is always
1500 * supported); thus, we don't need to change
1501 * the messages for netif_carrier.
1502 */
1503 printk(KERN_WARNING DRV_NAME
4e0952c7 1504 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1505 "available for interface %s, and "
1506 "arp_interval/arp_ip_target module parameters "
1507 "not specified, thus bonding will not detect "
1508 "link failures! see bonding.txt for details.\n",
4e0952c7 1509 bond_dev->name, slave_dev->name);
1da177e4
LT		 1510 } else if (link_reporting == -1) {
1511 /* unable get link status using mii/ethtool */
1512 printk(KERN_WARNING DRV_NAME
4e0952c7 1513 ": %s: Warning: can't get link status from "
1da177e4
LT		 1514 "interface %s; the network driver associated "
1515 "with this interface does not support MII or "
1516 "ETHTOOL link status reporting, thus miimon "
1517 "has no effect on this interface.\n",
4e0952c7 1518 bond_dev->name, slave_dev->name);
1da177e4
LT		 1519 }
1520 }
1521
1522 /* check for initial state */
1523 if (!bond->params.miimon ||
1524 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1525 if (bond->params.updelay) {
1526 dprintk("Initial state of slave_dev is "
1527 "BOND_LINK_BACK\n");
1528 new_slave->link = BOND_LINK_BACK;
1529 new_slave->delay = bond->params.updelay;
1530 } else {
1531 dprintk("Initial state of slave_dev is "
1532 "BOND_LINK_UP\n");
1533 new_slave->link = BOND_LINK_UP;
1534 }
1535 new_slave->jiffies = jiffies;
1536 } else {
1537 dprintk("Initial state of slave_dev is "
1538 "BOND_LINK_DOWN\n");
1539 new_slave->link = BOND_LINK_DOWN;
1540 }
1541
1542 if (bond_update_speed_duplex(new_slave) &&
1543 (new_slave->link != BOND_LINK_DOWN)) {
1544 printk(KERN_WARNING DRV_NAME
4e0952c7 1545 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1546 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1547 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1548
1549 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1550 printk(KERN_WARNING DRV_NAME
1551 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1552 "support in base driver for proper aggregator "
4e0952c7 1553 "selection.\n", bond_dev->name);
1da177e4
LT		 1554 }
1555 }
1556
1557 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1558 /* if there is a primary slave, remember it */
1559 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1560 bond->primary_slave = new_slave;
1561 }
1562 }
1563
1564 switch (bond->params.mode) {
1565 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1566 bond_set_slave_inactive_flags(new_slave);
1567 bond_select_active_slave(bond);
1da177e4
LT		 1568 break;
1569 case BOND_MODE_8023AD:
1570 /* in 802.3ad mode, the internal mechanism
1571 * will activate the slaves in the selected
1572 * aggregator
1573 */
1574 bond_set_slave_inactive_flags(new_slave);
1575 /* if this is the first slave */
1576 if (bond->slave_cnt == 1) {
1577 SLAVE_AD_INFO(new_slave).id = 1;
1578 /* Initialize AD with the number of times that the AD timer is called in 1 second
1579 * can be called only after the mac address of the bond is set
1580 */
1581 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1582 bond->params.lacp_fast);
1583 } else {
1584 SLAVE_AD_INFO(new_slave).id =
1585 SLAVE_AD_INFO(new_slave->prev).id + 1;
1586 }
1587
1588 bond_3ad_bind_slave(new_slave);
1589 break;
1590 case BOND_MODE_TLB:
1591 case BOND_MODE_ALB:
1592 new_slave->state = BOND_STATE_ACTIVE;
1593 if ((!bond->curr_active_slave) &&
1594 (new_slave->link != BOND_LINK_DOWN)) {
1595 /* first slave or no active slave yet, and this link
1596 * is OK, so make this interface the active one
1597 */
1598 bond_change_active_slave(bond, new_slave);
8f903c70
JV		 1599 } else {
1600 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1601 }
1602 break;
1603 default:
1604 dprintk("This slave is always active in trunk mode\n");
1605
1606 /* always active in trunk mode */
1607 new_slave->state = BOND_STATE_ACTIVE;
1608
1609 /* In trunking mode there is little meaning to curr_active_slave
1610 * anyway (it holds no special properties of the bond device),
1611 * so we can change it without calling change_active_interface()
1612 */
1613 if (!bond->curr_active_slave) {
1614 bond->curr_active_slave = new_slave;
1615 }
1616 break;
1617 } /* switch(bond_mode) */
1618
ff59c456
JV		 1619 bond_set_carrier(bond);
1620
1da177e4
LT		 1621 write_unlock_bh(&bond->lock);
1622
b76cdba9
MW		 1623 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1624 if (res)
1625 goto err_unset_master;
1626
1da177e4
LT		 1627 printk(KERN_INFO DRV_NAME
1628 ": %s: enslaving %s as a%s interface with a%s link.\n",
1629 bond_dev->name, slave_dev->name,
1630 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1631 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1632
1633 /* enslave is successful */
1634 return 0;
1635
1636/* Undo stages on error */
1637err_unset_master:
1638 netdev_set_master(slave_dev, NULL);
1639
1640err_close:
1641 dev_close(slave_dev);
1642
1643err_restore_mac:
dd957c57 1644 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1645 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1646 addr.sa_family = slave_dev->type;
1647 dev_set_mac_address(slave_dev, &addr);
1648 }
1da177e4
LT		 1649
1650err_free:
1651 kfree(new_slave);
1652
1653err_undo_flags:
1654 bond_dev->features = old_features;
8531c5ff 1655
1da177e4
LT		 1656 return res;
1657}
1658
1659/*
1660 * Try to release the slave device <slave> from the bond device <master>
1661 * It is legal to access curr_active_slave without a lock because all the function
1662 * is write-locked.
1663 *
1664 * The rules for slave state should be:
1665 * for Active/Backup:
1666 * Active stays on all backups go down
1667 * for Bonded connections:
1668 * The first up interface should be left on and all others downed.
1669 */
a77b5325 1670int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1671{
1672 struct bonding *bond = bond_dev->priv;
1673 struct slave *slave, *oldcurrent;
1674 struct sockaddr addr;
1675 int mac_addr_differ;
0795af57 1676 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1677
1678 /* slave is not a slave or master is not master of this slave */
1679 if (!(slave_dev->flags & IFF_SLAVE) ||
1680 (slave_dev->master != bond_dev)) {
1681 printk(KERN_ERR DRV_NAME
4e0952c7 1682 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1683 bond_dev->name, slave_dev->name);
1684 return -EINVAL;
1685 }
1686
1687 write_lock_bh(&bond->lock);
1688
1689 slave = bond_get_slave_by_dev(bond, slave_dev);
1690 if (!slave) {
1691 /* not a slave of this bond */
1692 printk(KERN_INFO DRV_NAME
1693 ": %s: %s not enslaved\n",
1694 bond_dev->name, slave_dev->name);
f5e2a7b2 1695 write_unlock_bh(&bond->lock);
1da177e4
LT		 1696 return -EINVAL;
1697 }
1698
1699 mac_addr_differ = memcmp(bond_dev->dev_addr,
1700 slave->perm_hwaddr,
1701 ETH_ALEN);
1702 if (!mac_addr_differ && (bond->slave_cnt > 1)) {
1703 printk(KERN_WARNING DRV_NAME
0795af57
JP		 1704 ": %s: Warning: the permanent HWaddr of %s - "
1705 "%s - is still in use by %s. "
1706 "Set the HWaddr of %s to a different address "
1707 "to avoid conflicts.\n",
4e0952c7 1708 bond_dev->name,
1da177e4 1709 slave_dev->name,
0795af57 1710 print_mac(mac, slave->perm_hwaddr),
1da177e4
LT		 1711 bond_dev->name,
1712 slave_dev->name);
1713 }
1714
1715 /* Inform AD package of unbinding of slave. */
1716 if (bond->params.mode == BOND_MODE_8023AD) {
1717 /* must be called before the slave is
1718 * detached from the list
1719 */
1720 bond_3ad_unbind_slave(slave);
1721 }
1722
1723 printk(KERN_INFO DRV_NAME
1724 ": %s: releasing %s interface %s\n",
1725 bond_dev->name,
1726 (slave->state == BOND_STATE_ACTIVE)
1727 ? "active" : "backup",
1728 slave_dev->name);
1729
1730 oldcurrent = bond->curr_active_slave;
1731
1732 bond->current_arp_slave = NULL;
1733
1734 /* release the slave from its bond */
1735 bond_detach_slave(bond, slave);
1736
8531c5ff
AK		 1737 bond_compute_features(bond);
1738
1da177e4
LT		 1739 if (bond->primary_slave == slave) {
1740 bond->primary_slave = NULL;
1741 }
1742
1743 if (oldcurrent == slave) {
1744 bond_change_active_slave(bond, NULL);
1745 }
1746
1747 if ((bond->params.mode == BOND_MODE_TLB) ||
1748 (bond->params.mode == BOND_MODE_ALB)) {
1749 /* Must be called only after the slave has been
1750 * detached from the list and the curr_active_slave
1751 * has been cleared (if our_slave == old_current),
1752 * but before a new active slave is selected.
1753 */
1754 bond_alb_deinit_slave(bond, slave);
1755 }
1756
ff59c456 1757 if (oldcurrent == slave)
1da177e4
LT		 1758 bond_select_active_slave(bond);
1759
1da177e4 1760 if (bond->slave_cnt == 0) {
ff59c456
JV		 1761 bond_set_carrier(bond);
1762
1da177e4
LT		 1763 /* if the last slave was removed, zero the mac address
1764 * of the master so it will be set by the application
1765 * to the mac address of the first slave
1766 */
1767 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1768
1769 if (list_empty(&bond->vlan_list)) {
1770 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1771 } else {
1772 printk(KERN_WARNING DRV_NAME
4e0952c7 1773 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1774 "still has VLANs.\n",
4e0952c7 1775 bond_dev->name, bond_dev->name);
1da177e4 1776 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1777 ": %s: When re-adding slaves, make sure the bond's "
1778 "HW address matches its VLANs'.\n",
1779 bond_dev->name);
1da177e4
LT		 1780 }
1781 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1782 !bond_has_challenged_slaves(bond)) {
1783 printk(KERN_INFO DRV_NAME
4e0952c7 1784 ": %s: last VLAN challenged slave %s "
1da177e4 1785 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1786 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1787 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1788 }
1789
1790 write_unlock_bh(&bond->lock);
1791
b76cdba9
MW		 1792 /* must do this from outside any spinlocks */
1793 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1794
1da177e4
LT		 1795 bond_del_vlans_from_slave(bond, slave_dev);
1796
1797 /* If the mode USES_PRIMARY, then we should only remove its
1798 * promisc and mc settings if it was the curr_active_slave, but that was
1799 * already taken care of above when we detached the slave
1800 */
1801 if (!USES_PRIMARY(bond->params.mode)) {
1802 /* unset promiscuity level from slave */
1803 if (bond_dev->flags & IFF_PROMISC) {
1804 dev_set_promiscuity(slave_dev, -1);
1805 }
1806
1807 /* unset allmulti level from slave */
1808 if (bond_dev->flags & IFF_ALLMULTI) {
1809 dev_set_allmulti(slave_dev, -1);
1810 }
1811
1812 /* flush master's mc_list from slave */
1813 bond_mc_list_flush(bond_dev, slave_dev);
1814 }
1815
1816 netdev_set_master(slave_dev, NULL);
1817
1818 /* close slave before restoring its mac address */
1819 dev_close(slave_dev);
1820
dd957c57 1821 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1822 /* restore original ("permanent") mac address */
1823 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1824 addr.sa_family = slave_dev->type;
1825 dev_set_mac_address(slave_dev, &addr);
1826 }
1da177e4 1827
8f903c70 1828 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1829 IFF_SLAVE_INACTIVE | IFF_BONDING |
1830 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1831
1832 kfree(slave);
1833
1834 return 0; /* deletion OK */
1835}
1836
d90a162a
MS		 1837/*
1838* Destroy a bonding device.
1839* Must be under rtnl_lock when this function is called.
1840*/
1841void bond_destroy(struct bonding *bond)
1842{
1843 bond_deinit(bond->dev);
1844 bond_destroy_sysfs_entry(bond);
1845 unregister_netdevice(bond->dev);
1846}
1847
1848/*
1849* First release a slave and than destroy the bond if no more slaves iare left.
1850* Must be under rtnl_lock when this function is called.
1851*/
1852int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1853{
1854 struct bonding *bond = bond_dev->priv;
1855 int ret;
1856
1857 ret = bond_release(bond_dev, slave_dev);
1858 if ((ret == 0) && (bond->slave_cnt == 0)) {
1859 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1860 bond_dev->name, bond_dev->name);
1861 bond_destroy(bond);
1862 }
1863 return ret;
1864}
1865
1da177e4
LT		 1866/*
1867 * This function releases all slaves.
1868 */
1869static int bond_release_all(struct net_device *bond_dev)
1870{
1871 struct bonding *bond = bond_dev->priv;
1872 struct slave *slave;
1873 struct net_device *slave_dev;
1874 struct sockaddr addr;
1875
1876 write_lock_bh(&bond->lock);
1877
ff59c456
JV		 1878 netif_carrier_off(bond_dev);
1879
1da177e4
LT		 1880 if (bond->slave_cnt == 0) {
1881 goto out;
1882 }
1883
1884 bond->current_arp_slave = NULL;
1885 bond->primary_slave = NULL;
1886 bond_change_active_slave(bond, NULL);
1887
1888 while ((slave = bond->first_slave) != NULL) {
1889 /* Inform AD package of unbinding of slave
1890 * before slave is detached from the list.
1891 */
1892 if (bond->params.mode == BOND_MODE_8023AD) {
1893 bond_3ad_unbind_slave(slave);
1894 }
1895
1896 slave_dev = slave->dev;
1897 bond_detach_slave(bond, slave);
1898
1899 if ((bond->params.mode == BOND_MODE_TLB) ||
1900 (bond->params.mode == BOND_MODE_ALB)) {
1901 /* must be called only after the slave
1902 * has been detached from the list
1903 */
1904 bond_alb_deinit_slave(bond, slave);
1905 }
1906
8531c5ff
AK		 1907 bond_compute_features(bond);
1908
1da177e4
LT		 1909 /* now that the slave is detached, unlock and perform
1910 * all the undo steps that should not be called from
1911 * within a lock.
1912 */
1913 write_unlock_bh(&bond->lock);
1914
b76cdba9 1915 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 1916 bond_del_vlans_from_slave(bond, slave_dev);
1917
1918 /* If the mode USES_PRIMARY, then we should only remove its
1919 * promisc and mc settings if it was the curr_active_slave, but that was
1920 * already taken care of above when we detached the slave
1921 */
1922 if (!USES_PRIMARY(bond->params.mode)) {
1923 /* unset promiscuity level from slave */
1924 if (bond_dev->flags & IFF_PROMISC) {
1925 dev_set_promiscuity(slave_dev, -1);
1926 }
1927
1928 /* unset allmulti level from slave */
1929 if (bond_dev->flags & IFF_ALLMULTI) {
1930 dev_set_allmulti(slave_dev, -1);
1931 }
1932
1933 /* flush master's mc_list from slave */
1934 bond_mc_list_flush(bond_dev, slave_dev);
1935 }
1936
1937 netdev_set_master(slave_dev, NULL);
1938
1939 /* close slave before restoring its mac address */
1940 dev_close(slave_dev);
1941
dd957c57 1942 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1943 /* restore original ("permanent") mac address*/
1944 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1945 addr.sa_family = slave_dev->type;
1946 dev_set_mac_address(slave_dev, &addr);
1947 }
1da177e4 1948
8f903c70
JV		 1949 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1950 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1951
1952 kfree(slave);
1953
1954 /* re-acquire the lock before getting the next slave */
1955 write_lock_bh(&bond->lock);
1956 }
1957
1958 /* zero the mac address of the master so it will be
1959 * set by the application to the mac address of the
1960 * first slave
1961 */
1962 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1963
1964 if (list_empty(&bond->vlan_list)) {
1965 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1966 } else {
1967 printk(KERN_WARNING DRV_NAME
4e0952c7 1968 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1969 "still has VLANs.\n",
4e0952c7 1970 bond_dev->name, bond_dev->name);
1da177e4 1971 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1972 ": %s: When re-adding slaves, make sure the bond's "
1973 "HW address matches its VLANs'.\n",
1974 bond_dev->name);
1da177e4
LT		 1975 }
1976
1977 printk(KERN_INFO DRV_NAME
1978 ": %s: released all slaves\n",
1979 bond_dev->name);
1980
1981out:
1982 write_unlock_bh(&bond->lock);
1983
1984 return 0;
1985}
1986
1987/*
1988 * This function changes the active slave to slave <slave_dev>.
1989 * It returns -EINVAL in the following cases.
1990 * - <slave_dev> is not found in the list.
1991 * - There is not active slave now.
1992 * - <slave_dev> is already active.
1993 * - The link state of <slave_dev> is not BOND_LINK_UP.
1994 * - <slave_dev> is not running.
1995 * In these cases, this fuction does nothing.
1996 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1997 */
1998static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
1999{
2000 struct bonding *bond = bond_dev->priv;
2001 struct slave *old_active = NULL;
2002 struct slave *new_active = NULL;
2003 int res = 0;
2004
2005 if (!USES_PRIMARY(bond->params.mode)) {
2006 return -EINVAL;
2007 }
2008
2009 /* Verify that master_dev is indeed the master of slave_dev */
2010 if (!(slave_dev->flags & IFF_SLAVE) ||
2011 (slave_dev->master != bond_dev)) {
2012 return -EINVAL;
2013 }
2014
2015 write_lock_bh(&bond->lock);
2016
2017 old_active = bond->curr_active_slave;
2018 new_active = bond_get_slave_by_dev(bond, slave_dev);
2019
2020 /*
2021 * Changing to the current active: do nothing; return success.
2022 */
2023 if (new_active && (new_active == old_active)) {
2024 write_unlock_bh(&bond->lock);
2025 return 0;
2026 }
2027
2028 if ((new_active) &&
2029 (old_active) &&
2030 (new_active->link == BOND_LINK_UP) &&
2031 IS_UP(new_active->dev)) {
2032 bond_change_active_slave(bond, new_active);
2033 } else {
2034 res = -EINVAL;
2035 }
2036
2037 write_unlock_bh(&bond->lock);
2038
2039 return res;
2040}
2041
1da177e4
LT		 2042static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2043{
2044 struct bonding *bond = bond_dev->priv;
2045
2046 info->bond_mode = bond->params.mode;
2047 info->miimon = bond->params.miimon;
2048
2049 read_lock_bh(&bond->lock);
2050 info->num_slaves = bond->slave_cnt;
2051 read_unlock_bh(&bond->lock);
2052
2053 return 0;
2054}
2055
2056static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2057{
2058 struct bonding *bond = bond_dev->priv;
2059 struct slave *slave;
2060 int i, found = 0;
2061
2062 if (info->slave_id < 0) {
2063 return -ENODEV;
2064 }
2065
2066 read_lock_bh(&bond->lock);
2067
2068 bond_for_each_slave(bond, slave, i) {
2069 if (i == (int)info->slave_id) {
2070 found = 1;
2071 break;
2072 }
2073 }
2074
2075 read_unlock_bh(&bond->lock);
2076
2077 if (found) {
2078 strcpy(info->slave_name, slave->dev->name);
2079 info->link = slave->link;
2080 info->state = slave->state;
2081 info->link_failure_count = slave->link_failure_count;
2082 } else {
2083 return -ENODEV;
2084 }
2085
2086 return 0;
2087}
2088
2089/*-------------------------------- Monitoring -------------------------------*/
2090
2091/* this function is called regularly to monitor each slave's link. */
a77b5325 2092void bond_mii_monitor(struct net_device *bond_dev)
1da177e4
LT		 2093{
2094 struct bonding *bond = bond_dev->priv;
2095 struct slave *slave, *oldcurrent;
2096 int do_failover = 0;
2097 int delta_in_ticks;
2098 int i;
2099
2100 read_lock(&bond->lock);
2101
2102 delta_in_ticks = (bond->params.miimon * HZ) / 1000;
2103
2104 if (bond->kill_timers) {
2105 goto out;
2106 }
2107
2108 if (bond->slave_cnt == 0) {
2109 goto re_arm;
2110 }
2111
2112 /* we will try to read the link status of each of our slaves, and
2113 * set their IFF_RUNNING flag appropriately. For each slave not
2114 * supporting MII status, we won't do anything so that a user-space
2115 * program could monitor the link itself if needed.
2116 */
2117
1053f62c
MS		 2118 if (bond->send_grat_arp) {
2119 if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
2120 &bond->curr_active_slave->dev->state))
2121 dprintk("Needs to send gratuitous arp but not yet\n");
2122 else {
2123 dprintk("sending delayed gratuitous arp on on %s\n",
2124 bond->curr_active_slave->dev->name);
2125 bond_send_gratuitous_arp(bond);
2126 bond->send_grat_arp = 0;
2127 }
2128 }
1da177e4
LT		 2129 read_lock(&bond->curr_slave_lock);
2130 oldcurrent = bond->curr_active_slave;
2131 read_unlock(&bond->curr_slave_lock);
2132
2133 bond_for_each_slave(bond, slave, i) {
2134 struct net_device *slave_dev = slave->dev;
2135 int link_state;
2136 u16 old_speed = slave->speed;
2137 u8 old_duplex = slave->duplex;
2138
2139 link_state = bond_check_dev_link(bond, slave_dev, 0);
2140
2141 switch (slave->link) {
2142 case BOND_LINK_UP: /* the link was up */
2143 if (link_state == BMSR_LSTATUS) {
2144 /* link stays up, nothing more to do */
2145 break;
2146 } else { /* link going down */
2147 slave->link = BOND_LINK_FAIL;
2148 slave->delay = bond->params.downdelay;
2149
2150 if (slave->link_failure_count < UINT_MAX) {
2151 slave->link_failure_count++;
2152 }
2153
2154 if (bond->params.downdelay) {
2155 printk(KERN_INFO DRV_NAME
2156 ": %s: link status down for %s "
2157 "interface %s, disabling it in "
2158 "%d ms.\n",
2159 bond_dev->name,
2160 IS_UP(slave_dev)
2161 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2162 ? ((slave == oldcurrent)
2163 ? "active " : "backup ")
2164 : "")
2165 : "idle ",
2166 slave_dev->name,
2167 bond->params.downdelay * bond->params.miimon);
2168 }
2169 }
2170 /* no break ! fall through the BOND_LINK_FAIL test to
2171 ensure proper action to be taken
2172 */
2173 case BOND_LINK_FAIL: /* the link has just gone down */
2174 if (link_state != BMSR_LSTATUS) {
2175 /* link stays down */
2176 if (slave->delay <= 0) {
2177 /* link down for too long time */
2178 slave->link = BOND_LINK_DOWN;
2179
2180 /* in active/backup mode, we must
2181 * completely disable this interface
2182 */
2183 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2184 (bond->params.mode == BOND_MODE_8023AD)) {
2185 bond_set_slave_inactive_flags(slave);
2186 }
2187
2188 printk(KERN_INFO DRV_NAME
2189 ": %s: link status definitely "
2190 "down for interface %s, "
2191 "disabling it\n",
2192 bond_dev->name,
2193 slave_dev->name);
2194
2195 /* notify ad that the link status has changed */
2196 if (bond->params.mode == BOND_MODE_8023AD) {
2197 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2198 }
2199
2200 if ((bond->params.mode == BOND_MODE_TLB) ||
2201 (bond->params.mode == BOND_MODE_ALB)) {
2202 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2203 }
2204
2205 if (slave == oldcurrent) {
2206 do_failover = 1;
2207 }
2208 } else {
2209 slave->delay--;
2210 }
2211 } else {
2212 /* link up again */
2213 slave->link = BOND_LINK_UP;
2214 slave->jiffies = jiffies;
2215 printk(KERN_INFO DRV_NAME
2216 ": %s: link status up again after %d "
2217 "ms for interface %s.\n",
2218 bond_dev->name,
2219 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2220 slave_dev->name);
2221 }
2222 break;
2223 case BOND_LINK_DOWN: /* the link was down */
2224 if (link_state != BMSR_LSTATUS) {
2225 /* the link stays down, nothing more to do */
2226 break;
2227 } else { /* link going up */
2228 slave->link = BOND_LINK_BACK;
2229 slave->delay = bond->params.updelay;
2230
2231 if (bond->params.updelay) {
2232 /* if updelay == 0, no need to
2233 advertise about a 0 ms delay */
2234 printk(KERN_INFO DRV_NAME
2235 ": %s: link status up for "
2236 "interface %s, enabling it "
2237 "in %d ms.\n",
2238 bond_dev->name,
2239 slave_dev->name,
2240 bond->params.updelay * bond->params.miimon);
2241 }
2242 }
2243 /* no break ! fall through the BOND_LINK_BACK state in
2244 case there's something to do.
2245 */
2246 case BOND_LINK_BACK: /* the link has just come back */
2247 if (link_state != BMSR_LSTATUS) {
2248 /* link down again */
2249 slave->link = BOND_LINK_DOWN;
2250
2251 printk(KERN_INFO DRV_NAME
2252 ": %s: link status down again after %d "
2253 "ms for interface %s.\n",
2254 bond_dev->name,
2255 (bond->params.updelay - slave->delay) * bond->params.miimon,
2256 slave_dev->name);
2257 } else {
2258 /* link stays up */
2259 if (slave->delay == 0) {
2260 /* now the link has been up for long time enough */
2261 slave->link = BOND_LINK_UP;
2262 slave->jiffies = jiffies;
2263
2264 if (bond->params.mode == BOND_MODE_8023AD) {
2265 /* prevent it from being the active one */
2266 slave->state = BOND_STATE_BACKUP;
2267 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2268 /* make it immediately active */
2269 slave->state = BOND_STATE_ACTIVE;
2270 } else if (slave != bond->primary_slave) {
2271 /* prevent it from being the active one */
2272 slave->state = BOND_STATE_BACKUP;
2273 }
2274
2275 printk(KERN_INFO DRV_NAME
2276 ": %s: link status definitely "
2277 "up for interface %s.\n",
2278 bond_dev->name,
2279 slave_dev->name);
2280
2281 /* notify ad that the link status has changed */
2282 if (bond->params.mode == BOND_MODE_8023AD) {
2283 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2284 }
2285
2286 if ((bond->params.mode == BOND_MODE_TLB) ||
2287 (bond->params.mode == BOND_MODE_ALB)) {
2288 bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
2289 }
2290
2291 if ((!oldcurrent) ||
2292 (slave == bond->primary_slave)) {
2293 do_failover = 1;
2294 }
2295 } else {
2296 slave->delay--;
2297 }
2298 }
2299 break;
2300 default:
2301 /* Should not happen */
4e0952c7
MW		 2302 printk(KERN_ERR DRV_NAME
2303 ": %s: Error: %s Illegal value (link=%d)\n",
2304 bond_dev->name,
2305 slave->dev->name,
2306 slave->link);
1da177e4
LT		 2307 goto out;
2308 } /* end of switch (slave->link) */
2309
2310 bond_update_speed_duplex(slave);
2311
2312 if (bond->params.mode == BOND_MODE_8023AD) {
2313 if (old_speed != slave->speed) {
2314 bond_3ad_adapter_speed_changed(slave);
2315 }
2316
2317 if (old_duplex != slave->duplex) {
2318 bond_3ad_adapter_duplex_changed(slave);
2319 }
2320 }
2321
2322 } /* end of for */
2323
2324 if (do_failover) {
2325 write_lock(&bond->curr_slave_lock);
2326
2327 bond_select_active_slave(bond);
2328
1da177e4 2329 write_unlock(&bond->curr_slave_lock);
ff59c456
JV		 2330 } else
2331 bond_set_carrier(bond);
1da177e4
LT		 2332
2333re_arm:
2334 if (bond->params.miimon) {
2335 mod_timer(&bond->mii_timer, jiffies + delta_in_ticks);
2336 }
2337out:
2338 read_unlock(&bond->lock);
2339}
2340
c3ade5ca 2341
d3bb52b0 2342static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2343{
2344 struct in_device *idev;
2345 struct in_ifaddr *ifa;
a144ea4b 2346 __be32 addr = 0;
c3ade5ca
JV		 2347
2348 if (!dev)
2349 return 0;
2350
2351 rcu_read_lock();
e5ed6399 2352 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2353 if (!idev)
2354 goto out;
2355
2356 ifa = idev->ifa_list;
2357 if (!ifa)
2358 goto out;
2359
2360 addr = ifa->ifa_local;
2361out:
2362 rcu_read_unlock();
2363 return addr;
2364}
2365
2366static int bond_has_ip(struct bonding *bond)
2367{
2368 struct vlan_entry *vlan, *vlan_next;
2369
2370 if (bond->master_ip)
2371 return 1;
2372
2373 if (list_empty(&bond->vlan_list))
2374 return 0;
2375
2376 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2377 vlan_list) {
2378 if (vlan->vlan_ip)
2379 return 1;
2380 }
2381
2382 return 0;
2383}
2384
d3bb52b0 2385static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966
JV		 2386{
2387 struct vlan_entry *vlan, *vlan_next;
2388
2389 if (ip == bond->master_ip)
2390 return 1;
2391
2392 if (list_empty(&bond->vlan_list))
2393 return 0;
2394
2395 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2396 vlan_list) {
2397 if (ip == vlan->vlan_ip)
2398 return 1;
2399 }
2400
2401 return 0;
2402}
2403
c3ade5ca
JV		 2404/*
2405 * We go to the (large) trouble of VLAN tagging ARP frames because
2406 * switches in VLAN mode (especially if ports are configured as
2407 * "native" to a VLAN) might not pass non-tagged frames.
2408 */
d3bb52b0 2409static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2410{
2411 struct sk_buff *skb;
2412
2413 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2414 slave_dev->name, dest_ip, src_ip, vlan_id);
2415
2416 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2417 NULL, slave_dev->dev_addr, NULL);
2418
2419 if (!skb) {
2420 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2421 return;
2422 }
2423 if (vlan_id) {
2424 skb = vlan_put_tag(skb, vlan_id);
2425 if (!skb) {
2426 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2427 return;
2428 }
2429 }
2430 arp_xmit(skb);
2431}
2432
2433
1da177e4
LT		 2434static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2435{
c3ade5ca 2436 int i, vlan_id, rv;
d3bb52b0 2437 __be32 *targets = bond->params.arp_targets;
c3ade5ca
JV		 2438 struct vlan_entry *vlan, *vlan_next;
2439 struct net_device *vlan_dev;
2440 struct flowi fl;
2441 struct rtable *rt;
1da177e4 2442
6b780567
MW		 2443 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2444 if (!targets[i])
2445 continue;
c3ade5ca
JV		 2446 dprintk("basa: target %x\n", targets[i]);
2447 if (list_empty(&bond->vlan_list)) {
2448 dprintk("basa: empty vlan: arp_send\n");
2449 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2450 bond->master_ip, 0);
2451 continue;
2452 }
2453
2454 /*
2455 * If VLANs are configured, we do a route lookup to
2456 * determine which VLAN interface would be used, so we
2457 * can tag the ARP with the proper VLAN tag.
2458 */
2459 memset(&fl, 0, sizeof(fl));
2460 fl.fl4_dst = targets[i];
2461 fl.fl4_tos = RTO_ONLINK;
2462
2463 rv = ip_route_output_key(&rt, &fl);
2464 if (rv) {
2465 if (net_ratelimit()) {
2466 printk(KERN_WARNING DRV_NAME
2467 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2468 bond->dev->name, NIPQUAD(fl.fl4_dst));
2469 }
2470 continue;
2471 }
2472
2473 /*
2474 * This target is not on a VLAN
2475 */
2476 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2477 ip_rt_put(rt);
c3ade5ca
JV		 2478 dprintk("basa: rtdev == bond->dev: arp_send\n");
2479 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2480 bond->master_ip, 0);
2481 continue;
2482 }
2483
2484 vlan_id = 0;
2485 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2486 vlan_list) {
5c15bdec 2487 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2488 if (vlan_dev == rt->u.dst.dev) {
2489 vlan_id = vlan->vlan_id;
2490 dprintk("basa: vlan match on %s %d\n",
2491 vlan_dev->name, vlan_id);
2492 break;
2493 }
2494 }
2495
2496 if (vlan_id) {
ed4b9f80 2497 ip_rt_put(rt);
c3ade5ca
JV		 2498 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2499 vlan->vlan_ip, vlan_id);
2500 continue;
2501 }
2502
2503 if (net_ratelimit()) {
2504 printk(KERN_WARNING DRV_NAME
2505 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2506 bond->dev->name, NIPQUAD(fl.fl4_dst),
2507 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2508 }
ed4b9f80 2509 ip_rt_put(rt);
c3ade5ca
JV		 2510 }
2511}
2512
2513/*
2514 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2515 * for each VLAN above us.
2516 */
2517static void bond_send_gratuitous_arp(struct bonding *bond)
2518{
2519 struct slave *slave = bond->curr_active_slave;
2520 struct vlan_entry *vlan;
2521 struct net_device *vlan_dev;
2522
2523 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2524 slave ? slave->dev->name : "NULL");
2525 if (!slave)
2526 return;
2527
2528 if (bond->master_ip) {
2529 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2530 bond->master_ip, 0);
c3ade5ca
JV		 2531 }
2532
2533 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2534 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2535 if (vlan->vlan_ip) {
2536 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2537 vlan->vlan_ip, vlan->vlan_id);
2538 }
1da177e4
LT		 2539 }
2540}
2541
d3bb52b0 2542static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2543{
2544 int i;
d3bb52b0 2545 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2546
2547 targets = bond->params.arp_targets;
2548 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2549 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2550 "%u.%u.%u.%u bhti(tip) %d\n",
2551 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2552 bond_has_this_ip(bond, tip));
2553 if (sip == targets[i]) {
2554 if (bond_has_this_ip(bond, tip))
2555 slave->last_arp_rx = jiffies;
2556 return;
2557 }
2558 }
2559}
2560
2561static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2562{
2563 struct arphdr *arp;
2564 struct slave *slave;
2565 struct bonding *bond;
2566 unsigned char *arp_ptr;
d3bb52b0 2567 __be32 sip, tip;
f5b2b966 2568
e730c155
EB		 2569 if (dev->nd_net != &init_net)
2570 goto out;
2571
f5b2b966
JV		 2572 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2573 goto out;
2574
2575 bond = dev->priv;
2576 read_lock(&bond->lock);
2577
2578 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2579 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2580 orig_dev ? orig_dev->name : "NULL");
2581
2582 slave = bond_get_slave_by_dev(bond, orig_dev);
2583 if (!slave || !slave_do_arp_validate(bond, slave))
2584 goto out_unlock;
2585
2586 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2587 if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
2588 (2 * dev->addr_len) +
2589 (2 * sizeof(u32)))))
2590 goto out_unlock;
2591
d0a92be0 2592 arp = arp_hdr(skb);
f5b2b966
JV		 2593 if (arp->ar_hln != dev->addr_len ||
2594 skb->pkt_type == PACKET_OTHERHOST ||
2595 skb->pkt_type == PACKET_LOOPBACK ||
2596 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2597 arp->ar_pro != htons(ETH_P_IP) ||
2598 arp->ar_pln != 4)
2599 goto out_unlock;
2600
2601 arp_ptr = (unsigned char *)(arp + 1);
2602 arp_ptr += dev->addr_len;
2603 memcpy(&sip, arp_ptr, 4);
2604 arp_ptr += 4 + dev->addr_len;
2605 memcpy(&tip, arp_ptr, 4);
2606
2607 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2608 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2609 slave->state, bond->params.arp_validate,
2610 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2611
2612 /*
2613 * Backup slaves won't see the ARP reply, but do come through
2614 * here for each ARP probe (so we swap the sip/tip to validate
2615 * the probe). In a "redundant switch, common router" type of
2616 * configuration, the ARP probe will (hopefully) travel from
2617 * the active, through one switch, the router, then the other
2618 * switch before reaching the backup.
2619 */
2620 if (slave->state == BOND_STATE_ACTIVE)
2621 bond_validate_arp(bond, slave, sip, tip);
2622 else
2623 bond_validate_arp(bond, slave, tip, sip);
2624
2625out_unlock:
2626 read_unlock(&bond->lock);
2627out:
2628 dev_kfree_skb(skb);
2629 return NET_RX_SUCCESS;
2630}
2631
1da177e4
LT		 2632/*
2633 * this function is called regularly to monitor each slave's link
2634 * ensuring that traffic is being sent and received when arp monitoring
2635 * is used in load-balancing mode. if the adapter has been dormant, then an
2636 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2637 * arp monitoring in active backup mode.
2638 */
a77b5325 2639void bond_loadbalance_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2640{
2641 struct bonding *bond = bond_dev->priv;
2642 struct slave *slave, *oldcurrent;
2643 int do_failover = 0;
2644 int delta_in_ticks;
2645 int i;
2646
2647 read_lock(&bond->lock);
2648
2649 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2650
2651 if (bond->kill_timers) {
2652 goto out;
2653 }
2654
2655 if (bond->slave_cnt == 0) {
2656 goto re_arm;
2657 }
2658
2659 read_lock(&bond->curr_slave_lock);
2660 oldcurrent = bond->curr_active_slave;
2661 read_unlock(&bond->curr_slave_lock);
2662
2663 /* see if any of the previous devices are up now (i.e. they have
2664 * xmt and rcv traffic). the curr_active_slave does not come into
2665 * the picture unless it is null. also, slave->jiffies is not needed
2666 * here because we send an arp on each slave and give a slave as
2667 * long as it needs to get the tx/rx within the delta.
2668 * TODO: what about up/down delay in arp mode? it wasn't here before
2669 * so it can wait
2670 */
2671 bond_for_each_slave(bond, slave, i) {
2672 if (slave->link != BOND_LINK_UP) {
2673 if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) &&
2674 ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) {
2675
2676 slave->link = BOND_LINK_UP;
2677 slave->state = BOND_STATE_ACTIVE;
2678
2679 /* primary_slave has no meaning in round-robin
2680 * mode. the window of a slave being up and
2681 * curr_active_slave being null after enslaving
2682 * is closed.
2683 */
2684 if (!oldcurrent) {
2685 printk(KERN_INFO DRV_NAME
2686 ": %s: link status definitely "
2687 "up for interface %s, ",
2688 bond_dev->name,
2689 slave->dev->name);
2690 do_failover = 1;
2691 } else {
2692 printk(KERN_INFO DRV_NAME
2693 ": %s: interface %s is now up\n",
2694 bond_dev->name,
2695 slave->dev->name);
2696 }
2697 }
2698 } else {
2699 /* slave->link == BOND_LINK_UP */
2700
2701 /* not all switches will respond to an arp request
2702 * when the source ip is 0, so don't take the link down
2703 * if we don't know our ip yet
2704 */
2705 if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
2706 (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
c3ade5ca 2707 bond_has_ip(bond))) {
1da177e4
LT		 2708
2709 slave->link = BOND_LINK_DOWN;
2710 slave->state = BOND_STATE_BACKUP;
2711
2712 if (slave->link_failure_count < UINT_MAX) {
2713 slave->link_failure_count++;
2714 }
2715
2716 printk(KERN_INFO DRV_NAME
2717 ": %s: interface %s is now down.\n",
2718 bond_dev->name,
2719 slave->dev->name);
2720
2721 if (slave == oldcurrent) {
2722 do_failover = 1;
2723 }
2724 }
2725 }
2726
2727 /* note: if switch is in round-robin mode, all links
2728 * must tx arp to ensure all links rx an arp - otherwise
2729 * links may oscillate or not come up at all; if switch is
2730 * in something like xor mode, there is nothing we can
2731 * do - all replies will be rx'ed on same link causing slaves
2732 * to be unstable during low/no traffic periods
2733 */
2734 if (IS_UP(slave->dev)) {
2735 bond_arp_send_all(bond, slave);
2736 }
2737 }
2738
2739 if (do_failover) {
2740 write_lock(&bond->curr_slave_lock);
2741
2742 bond_select_active_slave(bond);
2743
1da177e4
LT		 2744 write_unlock(&bond->curr_slave_lock);
2745 }
2746
2747re_arm:
2748 if (bond->params.arp_interval) {
2749 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2750 }
2751out:
2752 read_unlock(&bond->lock);
2753}
2754
2755/*
2756 * When using arp monitoring in active-backup mode, this function is
2757 * called to determine if any backup slaves have went down or a new
2758 * current slave needs to be found.
2759 * The backup slaves never generate traffic, they are considered up by merely
2760 * receiving traffic. If the current slave goes down, each backup slave will
2761 * be given the opportunity to tx/rx an arp before being taken down - this
2762 * prevents all slaves from being taken down due to the current slave not
2763 * sending any traffic for the backups to receive. The arps are not necessarily
2764 * necessary, any tx and rx traffic will keep the current slave up. While any
2765 * rx traffic will keep the backup slaves up, the current slave is responsible
2766 * for generating traffic to keep them up regardless of any other traffic they
2767 * may have received.
2768 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2769 */
a77b5325 2770void bond_activebackup_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2771{
2772 struct bonding *bond = bond_dev->priv;
2773 struct slave *slave;
2774 int delta_in_ticks;
2775 int i;
2776
2777 read_lock(&bond->lock);
2778
2779 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2780
2781 if (bond->kill_timers) {
2782 goto out;
2783 }
2784
2785 if (bond->slave_cnt == 0) {
2786 goto re_arm;
2787 }
2788
2789 /* determine if any slave has come up or any backup slave has
2790 * gone down
2791 * TODO: what about up/down delay in arp mode? it wasn't here before
2792 * so it can wait
2793 */
2794 bond_for_each_slave(bond, slave, i) {
2795 if (slave->link != BOND_LINK_UP) {
f5b2b966
JV		 2796 if ((jiffies - slave_last_rx(bond, slave)) <=
2797 delta_in_ticks) {
1da177e4
LT		 2798
2799 slave->link = BOND_LINK_UP;
2800
2801 write_lock(&bond->curr_slave_lock);
2802
2803 if ((!bond->curr_active_slave) &&
2804 ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) {
2805 bond_change_active_slave(bond, slave);
2806 bond->current_arp_slave = NULL;
2807 } else if (bond->curr_active_slave != slave) {
2808 /* this slave has just come up but we
2809 * already have a current slave; this
2810 * can also happen if bond_enslave adds
2811 * a new slave that is up while we are
2812 * searching for a new slave
2813 */
2814 bond_set_slave_inactive_flags(slave);
2815 bond->current_arp_slave = NULL;
2816 }
2817
ff59c456
JV		 2818 bond_set_carrier(bond);
2819
1da177e4
LT		 2820 if (slave == bond->curr_active_slave) {
2821 printk(KERN_INFO DRV_NAME
2822 ": %s: %s is up and now the "
2823 "active interface\n",
2824 bond_dev->name,
2825 slave->dev->name);
ff59c456 2826 netif_carrier_on(bond->dev);
1da177e4
LT		 2827 } else {
2828 printk(KERN_INFO DRV_NAME
2829 ": %s: backup interface %s is "
2830 "now up\n",
2831 bond_dev->name,
2832 slave->dev->name);
2833 }
2834
2835 write_unlock(&bond->curr_slave_lock);
2836 }
2837 } else {
2838 read_lock(&bond->curr_slave_lock);
2839
2840 if ((slave != bond->curr_active_slave) &&
2841 (!bond->current_arp_slave) &&
f5b2b966 2842 (((jiffies - slave_last_rx(bond, slave)) >= 3*delta_in_ticks) &&
c3ade5ca 2843 bond_has_ip(bond))) {
1da177e4
LT		 2844 /* a backup slave has gone down; three times
2845 * the delta allows the current slave to be
2846 * taken out before the backup slave.
2847 * note: a non-null current_arp_slave indicates
2848 * the curr_active_slave went down and we are
2849 * searching for a new one; under this
2850 * condition we only take the curr_active_slave
2851 * down - this gives each slave a chance to
2852 * tx/rx traffic before being taken out
2853 */
2854
2855 read_unlock(&bond->curr_slave_lock);
2856
2857 slave->link = BOND_LINK_DOWN;
2858
2859 if (slave->link_failure_count < UINT_MAX) {
2860 slave->link_failure_count++;
2861 }
2862
2863 bond_set_slave_inactive_flags(slave);
2864
2865 printk(KERN_INFO DRV_NAME
2866 ": %s: backup interface %s is now down\n",
2867 bond_dev->name,
2868 slave->dev->name);
2869 } else {
2870 read_unlock(&bond->curr_slave_lock);
2871 }
2872 }
2873 }
2874
2875 read_lock(&bond->curr_slave_lock);
2876 slave = bond->curr_active_slave;
2877 read_unlock(&bond->curr_slave_lock);
2878
2879 if (slave) {
2880 /* if we have sent traffic in the past 2*arp_intervals but
2881 * haven't xmit and rx traffic in that time interval, select
2882 * a different slave. slave->jiffies is only updated when
2883 * a slave first becomes the curr_active_slave - not necessarily
2884 * after every arp; this ensures the slave has a full 2*delta
2885 * before being taken out. if a primary is being used, check
2886 * if it is up and needs to take over as the curr_active_slave
2887 */
2888 if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
f5b2b966 2889 (((jiffies - slave_last_rx(bond, slave)) >= (2*delta_in_ticks)) &&
c3ade5ca 2890 bond_has_ip(bond))) &&
1da177e4
LT		 2891 ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) {
2892
2893 slave->link = BOND_LINK_DOWN;
2894
2895 if (slave->link_failure_count < UINT_MAX) {
2896 slave->link_failure_count++;
2897 }
2898
2899 printk(KERN_INFO DRV_NAME
2900 ": %s: link status down for active interface "
2901 "%s, disabling it\n",
2902 bond_dev->name,
2903 slave->dev->name);
2904
2905 write_lock(&bond->curr_slave_lock);
2906
2907 bond_select_active_slave(bond);
2908 slave = bond->curr_active_slave;
2909
2910 write_unlock(&bond->curr_slave_lock);
2911
2912 bond->current_arp_slave = slave;
2913
2914 if (slave) {
2915 slave->jiffies = jiffies;
2916 }
2917 } else if ((bond->primary_slave) &&
2918 (bond->primary_slave != slave) &&
2919 (bond->primary_slave->link == BOND_LINK_UP)) {
2920 /* at this point, slave is the curr_active_slave */
2921 printk(KERN_INFO DRV_NAME
2922 ": %s: changing from interface %s to primary "
2923 "interface %s\n",
2924 bond_dev->name,
2925 slave->dev->name,
2926 bond->primary_slave->dev->name);
2927
2928 /* primary is up so switch to it */
2929 write_lock(&bond->curr_slave_lock);
2930 bond_change_active_slave(bond, bond->primary_slave);
2931 write_unlock(&bond->curr_slave_lock);
2932
2933 slave = bond->primary_slave;
2934 slave->jiffies = jiffies;
2935 } else {
2936 bond->current_arp_slave = NULL;
2937 }
2938
2939 /* the current slave must tx an arp to ensure backup slaves
2940 * rx traffic
2941 */
c3ade5ca 2942 if (slave && bond_has_ip(bond)) {
1da177e4
LT		 2943 bond_arp_send_all(bond, slave);
2944 }
2945 }
2946
2947 /* if we don't have a curr_active_slave, search for the next available
2948 * backup slave from the current_arp_slave and make it the candidate
2949 * for becoming the curr_active_slave
2950 */
2951 if (!slave) {
2952 if (!bond->current_arp_slave) {
2953 bond->current_arp_slave = bond->first_slave;
2954 }
2955
2956 if (bond->current_arp_slave) {
2957 bond_set_slave_inactive_flags(bond->current_arp_slave);
2958
2959 /* search for next candidate */
2f872f04 2960 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
1da177e4
LT		 2961 if (IS_UP(slave->dev)) {
2962 slave->link = BOND_LINK_BACK;
2963 bond_set_slave_active_flags(slave);
2964 bond_arp_send_all(bond, slave);
2965 slave->jiffies = jiffies;
2966 bond->current_arp_slave = slave;
2967 break;
2968 }
2969
2970 /* if the link state is up at this point, we
2971 * mark it down - this can happen if we have
2972 * simultaneous link failures and
2973 * reselect_active_interface doesn't make this
2974 * one the current slave so it is still marked
2975 * up when it is actually down
2976 */
2977 if (slave->link == BOND_LINK_UP) {
2978 slave->link = BOND_LINK_DOWN;
2979 if (slave->link_failure_count < UINT_MAX) {
2980 slave->link_failure_count++;
2981 }
2982
2983 bond_set_slave_inactive_flags(slave);
2984
2985 printk(KERN_INFO DRV_NAME
2986 ": %s: backup interface %s is "
2987 "now down.\n",
2988 bond_dev->name,
2989 slave->dev->name);
2990 }
2991 }
2992 }
2993 }
2994
2995re_arm:
2996 if (bond->params.arp_interval) {
2997 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2998 }
2999out:
3000 read_unlock(&bond->lock);
3001}
3002
3003/*------------------------------ proc/seq_file-------------------------------*/
3004
3005#ifdef CONFIG_PROC_FS
3006
3007#define SEQ_START_TOKEN ((void *)1)
3008
3009static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3010{
3011 struct bonding *bond = seq->private;
3012 loff_t off = 0;
3013 struct slave *slave;
3014 int i;
3015
3016 /* make sure the bond won't be taken away */
3017 read_lock(&dev_base_lock);
3018 read_lock_bh(&bond->lock);
3019
3020 if (*pos == 0) {
3021 return SEQ_START_TOKEN;
3022 }
3023
3024 bond_for_each_slave(bond, slave, i) {
3025 if (++off == *pos) {
3026 return slave;
3027 }
3028 }
3029
3030 return NULL;
3031}
3032
3033static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3034{
3035 struct bonding *bond = seq->private;
3036 struct slave *slave = v;
3037
3038 ++*pos;
3039 if (v == SEQ_START_TOKEN) {
3040 return bond->first_slave;
3041 }
3042
3043 slave = slave->next;
3044
3045 return (slave == bond->first_slave) ? NULL : slave;
3046}
3047
3048static void bond_info_seq_stop(struct seq_file *seq, void *v)
3049{
3050 struct bonding *bond = seq->private;
3051
3052 read_unlock_bh(&bond->lock);
3053 read_unlock(&dev_base_lock);
3054}
3055
3056static void bond_info_show_master(struct seq_file *seq)
3057{
3058 struct bonding *bond = seq->private;
3059 struct slave *curr;
4756b02f
MW		 3060 int i;
3061 u32 target;
1da177e4
LT		 3062
3063 read_lock(&bond->curr_slave_lock);
3064 curr = bond->curr_active_slave;
3065 read_unlock(&bond->curr_slave_lock);
3066
dd957c57 3067 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3068 bond_mode_name(bond->params.mode));
3069
dd957c57
JV		 3070 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3071 bond->params.fail_over_mac)
3072 seq_printf(seq, " (fail_over_mac)");
3073
3074 seq_printf(seq, "\n");
3075
c61b75ad
MW		 3076 if (bond->params.mode == BOND_MODE_XOR ||
3077 bond->params.mode == BOND_MODE_8023AD) {
3078 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3079 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3080 bond->params.xmit_policy);
3081 }
3082
1da177e4
LT		 3083 if (USES_PRIMARY(bond->params.mode)) {
3084 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3085 (bond->primary_slave) ?
3086 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3087
3088 seq_printf(seq, "Currently Active Slave: %s\n",
3089 (curr) ? curr->dev->name : "None");
3090 }
3091
ff59c456
JV		 3092 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3093 "up" : "down");
1da177e4
LT		 3094 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3095 seq_printf(seq, "Up Delay (ms): %d\n",
3096 bond->params.updelay * bond->params.miimon);
3097 seq_printf(seq, "Down Delay (ms): %d\n",
3098 bond->params.downdelay * bond->params.miimon);
3099
4756b02f
MW		 3100
3101 /* ARP information */
3102 if(bond->params.arp_interval > 0) {
3103 int printed=0;
3104 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3105 bond->params.arp_interval);
3106
3107 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3108
3109 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3110 if (!bond->params.arp_targets[i])
3111 continue;
3112 if (printed)
3113 seq_printf(seq, ",");
3114 target = ntohl(bond->params.arp_targets[i]);
3115 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3116 printed = 1;
3117 }
3118 seq_printf(seq, "\n");
3119 }
3120
1da177e4
LT		 3121 if (bond->params.mode == BOND_MODE_8023AD) {
3122 struct ad_info ad_info;
0795af57 3123 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3124
3125 seq_puts(seq, "\n802.3ad info\n");
3126 seq_printf(seq, "LACP rate: %s\n",
3127 (bond->params.lacp_fast) ? "fast" : "slow");
3128
3129 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3130 seq_printf(seq, "bond %s has no active aggregator\n",
3131 bond->dev->name);
3132 } else {
3133 seq_printf(seq, "Active Aggregator Info:\n");
3134
3135 seq_printf(seq, "\tAggregator ID: %d\n",
3136 ad_info.aggregator_id);
3137 seq_printf(seq, "\tNumber of ports: %d\n",
3138 ad_info.ports);
3139 seq_printf(seq, "\tActor Key: %d\n",
3140 ad_info.actor_key);
3141 seq_printf(seq, "\tPartner Key: %d\n",
3142 ad_info.partner_key);
0795af57
JP		 3143 seq_printf(seq, "\tPartner Mac Address: %s\n",
3144 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3145 }
3146 }
3147}
3148
3149static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3150{
3151 struct bonding *bond = seq->private;
0795af57 3152 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3153
3154 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3155 seq_printf(seq, "MII Status: %s\n",
3156 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3157 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3158 slave->link_failure_count);
3159
217df670 3160 seq_printf(seq,
0795af57
JP		 3161 "Permanent HW addr: %s\n",
3162 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3163
3164 if (bond->params.mode == BOND_MODE_8023AD) {
3165 const struct aggregator *agg
3166 = SLAVE_AD_INFO(slave).port.aggregator;
3167
3168 if (agg) {
3169 seq_printf(seq, "Aggregator ID: %d\n",
3170 agg->aggregator_identifier);
3171 } else {
3172 seq_puts(seq, "Aggregator ID: N/A\n");
3173 }
3174 }
3175}
3176
3177static int bond_info_seq_show(struct seq_file *seq, void *v)
3178{
3179 if (v == SEQ_START_TOKEN) {
3180 seq_printf(seq, "%s\n", version);
3181 bond_info_show_master(seq);
3182 } else {
3183 bond_info_show_slave(seq, v);
3184 }
3185
3186 return 0;
3187}
3188
3189static struct seq_operations bond_info_seq_ops = {
3190 .start = bond_info_seq_start,
3191 .next = bond_info_seq_next,
3192 .stop = bond_info_seq_stop,
3193 .show = bond_info_seq_show,
3194};
3195
3196static int bond_info_open(struct inode *inode, struct file *file)
3197{
3198 struct seq_file *seq;
3199 struct proc_dir_entry *proc;
3200 int res;
3201
3202 res = seq_open(file, &bond_info_seq_ops);
3203 if (!res) {
3204 /* recover the pointer buried in proc_dir_entry data */
3205 seq = file->private_data;
3206 proc = PDE(inode);
3207 seq->private = proc->data;
3208 }
3209
3210 return res;
3211}
3212
d54b1fdb 3213static const struct file_operations bond_info_fops = {
1da177e4
LT		 3214 .owner = THIS_MODULE,
3215 .open = bond_info_open,
3216 .read = seq_read,
3217 .llseek = seq_lseek,
3218 .release = seq_release,
3219};
3220
3221static int bond_create_proc_entry(struct bonding *bond)
3222{
3223 struct net_device *bond_dev = bond->dev;
3224
3225 if (bond_proc_dir) {
3226 bond->proc_entry = create_proc_entry(bond_dev->name,
3227 S_IRUGO,
3228 bond_proc_dir);
3229 if (bond->proc_entry == NULL) {
3230 printk(KERN_WARNING DRV_NAME
3231 ": Warning: Cannot create /proc/net/%s/%s\n",
3232 DRV_NAME, bond_dev->name);
3233 } else {
3234 bond->proc_entry->data = bond;
3235 bond->proc_entry->proc_fops = &bond_info_fops;
3236 bond->proc_entry->owner = THIS_MODULE;
3237 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3238 }
3239 }
3240
3241 return 0;
3242}
3243
3244static void bond_remove_proc_entry(struct bonding *bond)
3245{
3246 if (bond_proc_dir && bond->proc_entry) {
3247 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3248 memset(bond->proc_file_name, 0, IFNAMSIZ);
3249 bond->proc_entry = NULL;
3250 }
3251}
3252
3253/* Create the bonding directory under /proc/net, if doesn't exist yet.
3254 * Caller must hold rtnl_lock.
3255 */
3256static void bond_create_proc_dir(void)
3257{
3258 int len = strlen(DRV_NAME);
3259
457c4cbc 3260 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3261 bond_proc_dir = bond_proc_dir->next) {
3262 if ((bond_proc_dir->namelen == len) &&
3263 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3264 break;
3265 }
3266 }
3267
3268 if (!bond_proc_dir) {
457c4cbc 3269 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3270 if (bond_proc_dir) {
3271 bond_proc_dir->owner = THIS_MODULE;
3272 } else {
3273 printk(KERN_WARNING DRV_NAME
3274 ": Warning: cannot create /proc/net/%s\n",
3275 DRV_NAME);
3276 }
3277 }
3278}
3279
3280/* Destroy the bonding directory under /proc/net, if empty.
3281 * Caller must hold rtnl_lock.
3282 */
3283static void bond_destroy_proc_dir(void)
3284{
3285 struct proc_dir_entry *de;
3286
3287 if (!bond_proc_dir) {
3288 return;
3289 }
3290
3291 /* verify that the /proc dir is empty */
3292 for (de = bond_proc_dir->subdir; de; de = de->next) {
3293 /* ignore . and .. */
3294 if (*(de->name) != '.') {
3295 break;
3296 }
3297 }
3298
3299 if (de) {
3300 if (bond_proc_dir->owner == THIS_MODULE) {
3301 bond_proc_dir->owner = NULL;
3302 }
3303 } else {
457c4cbc 3304 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3305 bond_proc_dir = NULL;
3306 }
3307}
3308#endif /* CONFIG_PROC_FS */
3309
3310/*-------------------------- netdev event handling --------------------------*/
3311
3312/*
3313 * Change device name
3314 */
3315static int bond_event_changename(struct bonding *bond)
3316{
3317#ifdef CONFIG_PROC_FS
3318 bond_remove_proc_entry(bond);
3319 bond_create_proc_entry(bond);
3320#endif
b76cdba9
MW		 3321 down_write(&(bonding_rwsem));
3322 bond_destroy_sysfs_entry(bond);
3323 bond_create_sysfs_entry(bond);
3324 up_write(&(bonding_rwsem));
1da177e4
LT		 3325 return NOTIFY_DONE;
3326}
3327
3328static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3329{
3330 struct bonding *event_bond = bond_dev->priv;
3331
3332 switch (event) {
3333 case NETDEV_CHANGENAME:
3334 return bond_event_changename(event_bond);
3335 case NETDEV_UNREGISTER:
3336 /*
3337 * TODO: remove a bond from the list?
3338 */
3339 break;
3340 default:
3341 break;
3342 }
3343
3344 return NOTIFY_DONE;
3345}
3346
3347static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3348{
3349 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3350 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3351
3352 switch (event) {
3353 case NETDEV_UNREGISTER:
3354 if (bond_dev) {
1284cd3a
JV		 3355 if (bond->setup_by_slave)
3356 bond_release_and_destroy(bond_dev, slave_dev);
3357 else
3358 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3359 }
3360 break;
3361 case NETDEV_CHANGE:
3362 /*
3363 * TODO: is this what we get if somebody
3364 * sets up a hierarchical bond, then rmmod's
3365 * one of the slave bonding devices?
3366 */
3367 break;
3368 case NETDEV_DOWN:
3369 /*
3370 * ... Or is it this?
3371 */
3372 break;
3373 case NETDEV_CHANGEMTU:
3374 /*
3375 * TODO: Should slaves be allowed to
3376 * independently alter their MTU? For
3377 * an active-backup bond, slaves need
3378 * not be the same type of device, so
3379 * MTUs may vary. For other modes,
3380 * slaves arguably should have the
3381 * same MTUs. To do this, we'd need to
3382 * take over the slave's change_mtu
3383 * function for the duration of their
3384 * servitude.
3385 */
3386 break;
3387 case NETDEV_CHANGENAME:
3388 /*
3389 * TODO: handle changing the primary's name
3390 */
3391 break;
8531c5ff
AK		 3392 case NETDEV_FEAT_CHANGE:
3393 bond_compute_features(bond);
3394 break;
1da177e4
LT		 3395 default:
3396 break;
3397 }
3398
3399 return NOTIFY_DONE;
3400}
3401
3402/*
3403 * bond_netdev_event: handle netdev notifier chain events.
3404 *
3405 * This function receives events for the netdev chain. The caller (an
e041c683 3406 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3407 * locks for us to safely manipulate the slave devices (RTNL lock,
3408 * dev_probe_lock).
3409 */
3410static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3411{
3412 struct net_device *event_dev = (struct net_device *)ptr;
3413
e9dc8653
EB		 3414 if (event_dev->nd_net != &init_net)
3415 return NOTIFY_DONE;
3416
1da177e4
LT		 3417 dprintk("event_dev: %s, event: %lx\n",
3418 (event_dev ? event_dev->name : "None"),
3419 event);
3420
0b680e75
JV		 3421 if (!(event_dev->priv_flags & IFF_BONDING))
3422 return NOTIFY_DONE;
3423
1da177e4
LT		 3424 if (event_dev->flags & IFF_MASTER) {
3425 dprintk("IFF_MASTER\n");
3426 return bond_master_netdev_event(event, event_dev);
3427 }
3428
3429 if (event_dev->flags & IFF_SLAVE) {
3430 dprintk("IFF_SLAVE\n");
3431 return bond_slave_netdev_event(event, event_dev);
3432 }
3433
3434 return NOTIFY_DONE;
3435}
3436
c3ade5ca
JV		 3437/*
3438 * bond_inetaddr_event: handle inetaddr notifier chain events.
3439 *
3440 * We keep track of device IPs primarily to use as source addresses in
3441 * ARP monitor probes (rather than spewing out broadcasts all the time).
3442 *
3443 * We track one IP for the main device (if it has one), plus one per VLAN.
3444 */
3445static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3446{
3447 struct in_ifaddr *ifa = ptr;
3448 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3449 struct bonding *bond, *bond_next;
3450 struct vlan_entry *vlan, *vlan_next;
3451
3452 list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
3453 if (bond->dev == event_dev) {
3454 switch (event) {
3455 case NETDEV_UP:
3456 bond->master_ip = ifa->ifa_local;
3457 return NOTIFY_OK;
3458 case NETDEV_DOWN:
3459 bond->master_ip = bond_glean_dev_ip(bond->dev);
3460 return NOTIFY_OK;
3461 default:
3462 return NOTIFY_DONE;
3463 }
3464 }
3465
3466 if (list_empty(&bond->vlan_list))
3467 continue;
3468
3469 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
3470 vlan_list) {
5c15bdec 3471 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3472 if (vlan_dev == event_dev) {
3473 switch (event) {
3474 case NETDEV_UP:
3475 vlan->vlan_ip = ifa->ifa_local;
3476 return NOTIFY_OK;
3477 case NETDEV_DOWN:
3478 vlan->vlan_ip =
3479 bond_glean_dev_ip(vlan_dev);
3480 return NOTIFY_OK;
3481 default:
3482 return NOTIFY_DONE;
3483 }
3484 }
3485 }
3486 }
3487 return NOTIFY_DONE;
3488}
3489
1da177e4
LT		 3490static struct notifier_block bond_netdev_notifier = {
3491 .notifier_call = bond_netdev_event,
3492};
3493
c3ade5ca
JV		 3494static struct notifier_block bond_inetaddr_notifier = {
3495 .notifier_call = bond_inetaddr_event,
3496};
3497
1da177e4
LT		 3498/*-------------------------- Packet type handling ---------------------------*/
3499
3500/* register to receive lacpdus on a bond */
3501static void bond_register_lacpdu(struct bonding *bond)
3502{
3503 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3504
3505 /* initialize packet type */
3506 pk_type->type = PKT_TYPE_LACPDU;
3507 pk_type->dev = bond->dev;
3508 pk_type->func = bond_3ad_lacpdu_recv;
3509
3510 dev_add_pack(pk_type);
3511}
3512
3513/* unregister to receive lacpdus on a bond */
3514static void bond_unregister_lacpdu(struct bonding *bond)
3515{
3516 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3517}
3518
f5b2b966
JV		 3519void bond_register_arp(struct bonding *bond)
3520{
3521 struct packet_type *pt = &bond->arp_mon_pt;
3522
c4f283b1
JV		 3523 if (pt->type)
3524 return;
3525
f5b2b966 3526 pt->type = htons(ETH_P_ARP);
e245cb71 3527 pt->dev = bond->dev;
f5b2b966
JV		 3528 pt->func = bond_arp_rcv;
3529 dev_add_pack(pt);
3530}
3531
3532void bond_unregister_arp(struct bonding *bond)
3533{
c4f283b1
JV		 3534 struct packet_type *pt = &bond->arp_mon_pt;
3535
3536 dev_remove_pack(pt);
3537 pt->type = 0;
f5b2b966
JV		 3538}
3539
169a3e66
JV		 3540/*---------------------------- Hashing Policies -----------------------------*/
3541
3542/*
59c51591 3543 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3544 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3545 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3546 */
3547static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3548 struct net_device *bond_dev, int count)
3549{
3550 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3551 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3552 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3553 int layer4_xor = 0;
3554
3555 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3556 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3557 (iph->protocol == IPPROTO_TCP ||
3558 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3559 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3560 }
3561 return (layer4_xor ^
3562 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3563
3564 }
3565
3566 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3567}
3568
3569/*
3570 * Hash for the output device based upon layer 2 data
3571 */
3572static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3573 struct net_device *bond_dev, int count)
3574{
3575 struct ethhdr *data = (struct ethhdr *)skb->data;
3576
3577 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3578}
3579
1da177e4
LT		 3580/*-------------------------- Device entry points ----------------------------*/
3581
3582static int bond_open(struct net_device *bond_dev)
3583{
3584 struct bonding *bond = bond_dev->priv;
3585 struct timer_list *mii_timer = &bond->mii_timer;
3586 struct timer_list *arp_timer = &bond->arp_timer;
3587
3588 bond->kill_timers = 0;
3589
3590 if ((bond->params.mode == BOND_MODE_TLB) ||
3591 (bond->params.mode == BOND_MODE_ALB)) {
3592 struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer);
3593
3594 /* bond_alb_initialize must be called before the timer
3595 * is started.
3596 */
3597 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3598 /* something went wrong - fail the open operation */
3599 return -1;
3600 }
3601
3602 init_timer(alb_timer);
3603 alb_timer->expires = jiffies + 1;
3604 alb_timer->data = (unsigned long)bond;
3605 alb_timer->function = (void *)&bond_alb_monitor;
3606 add_timer(alb_timer);
3607 }
3608
3609 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3610 init_timer(mii_timer);
3611 mii_timer->expires = jiffies + 1;
3612 mii_timer->data = (unsigned long)bond_dev;
3613 mii_timer->function = (void *)&bond_mii_monitor;
3614 add_timer(mii_timer);
3615 }
3616
3617 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3618 init_timer(arp_timer);
3619 arp_timer->expires = jiffies + 1;
3620 arp_timer->data = (unsigned long)bond_dev;
3621 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
3622 arp_timer->function = (void *)&bond_activebackup_arp_mon;
3623 } else {
3624 arp_timer->function = (void *)&bond_loadbalance_arp_mon;
3625 }
f5b2b966
JV		 3626 if (bond->params.arp_validate)
3627 bond_register_arp(bond);
3628
1da177e4
LT		 3629 add_timer(arp_timer);
3630 }
3631
3632 if (bond->params.mode == BOND_MODE_8023AD) {
3633 struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer);
3634 init_timer(ad_timer);
3635 ad_timer->expires = jiffies + 1;
3636 ad_timer->data = (unsigned long)bond;
3637 ad_timer->function = (void *)&bond_3ad_state_machine_handler;
3638 add_timer(ad_timer);
3639
3640 /* register to receive LACPDUs */
3641 bond_register_lacpdu(bond);
3642 }
3643
3644 return 0;
3645}
3646
3647static int bond_close(struct net_device *bond_dev)
3648{
3649 struct bonding *bond = bond_dev->priv;
3650
3651 if (bond->params.mode == BOND_MODE_8023AD) {
3652 /* Unregister the receive of LACPDUs */
3653 bond_unregister_lacpdu(bond);
3654 }
3655
f5b2b966
JV		 3656 if (bond->params.arp_validate)
3657 bond_unregister_arp(bond);
3658
1da177e4
LT		 3659 write_lock_bh(&bond->lock);
3660
1da177e4
LT		 3661
3662 /* signal timers not to re-arm */
3663 bond->kill_timers = 1;
3664
3665 write_unlock_bh(&bond->lock);
3666
3667 /* del_timer_sync must run without holding the bond->lock
3668 * because a running timer might be trying to hold it too
3669 */
3670
3671 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3672 del_timer_sync(&bond->mii_timer);
3673 }
3674
3675 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3676 del_timer_sync(&bond->arp_timer);
3677 }
3678
3679 switch (bond->params.mode) {
3680 case BOND_MODE_8023AD:
3681 del_timer_sync(&(BOND_AD_INFO(bond).ad_timer));
3682 break;
3683 case BOND_MODE_TLB:
3684 case BOND_MODE_ALB:
3685 del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer));
3686 break;
3687 default:
3688 break;
3689 }
3690
1da177e4
LT		 3691
3692 if ((bond->params.mode == BOND_MODE_TLB) ||
3693 (bond->params.mode == BOND_MODE_ALB)) {
3694 /* Must be called only after all
3695 * slaves have been released
3696 */
3697 bond_alb_deinitialize(bond);
3698 }
3699
3700 return 0;
3701}
3702
3703static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3704{
3705 struct bonding *bond = bond_dev->priv;
3706 struct net_device_stats *stats = &(bond->stats), *sstats;
3707 struct slave *slave;
3708 int i;
3709
3710 memset(stats, 0, sizeof(struct net_device_stats));
3711
3712 read_lock_bh(&bond->lock);
3713
3714 bond_for_each_slave(bond, slave, i) {
c45d286e 3715 sstats = slave->dev->get_stats(slave->dev);
5a1b5898
RR		 3716 stats->rx_packets += sstats->rx_packets;
3717 stats->rx_bytes += sstats->rx_bytes;
3718 stats->rx_errors += sstats->rx_errors;
3719 stats->rx_dropped += sstats->rx_dropped;
3720
3721 stats->tx_packets += sstats->tx_packets;
3722 stats->tx_bytes += sstats->tx_bytes;
3723 stats->tx_errors += sstats->tx_errors;
3724 stats->tx_dropped += sstats->tx_dropped;
3725
3726 stats->multicast += sstats->multicast;
3727 stats->collisions += sstats->collisions;
3728
3729 stats->rx_length_errors += sstats->rx_length_errors;
3730 stats->rx_over_errors += sstats->rx_over_errors;
3731 stats->rx_crc_errors += sstats->rx_crc_errors;
3732 stats->rx_frame_errors += sstats->rx_frame_errors;
3733 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3734 stats->rx_missed_errors += sstats->rx_missed_errors;
3735
3736 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3737 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3738 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3739 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3740 stats->tx_window_errors += sstats->tx_window_errors;
1da177e4
LT		 3741 }
3742
3743 read_unlock_bh(&bond->lock);
3744
3745 return stats;
3746}
3747
3748static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3749{
3750 struct net_device *slave_dev = NULL;
3751 struct ifbond k_binfo;
3752 struct ifbond __user *u_binfo = NULL;
3753 struct ifslave k_sinfo;
3754 struct ifslave __user *u_sinfo = NULL;
3755 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3756 int res = 0;
3757
3758 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3759 bond_dev->name, cmd);
3760
3761 switch (cmd) {
1da177e4
LT		 3762 case SIOCGMIIPHY:
3763 mii = if_mii(ifr);
3764 if (!mii) {
3765 return -EINVAL;
3766 }
3767 mii->phy_id = 0;
3768 /* Fall Through */
3769 case SIOCGMIIREG:
3770 /*
3771 * We do this again just in case we were called by SIOCGMIIREG
3772 * instead of SIOCGMIIPHY.
3773 */
3774 mii = if_mii(ifr);
3775 if (!mii) {
3776 return -EINVAL;
3777 }
3778
3779 if (mii->reg_num == 1) {
3780 struct bonding *bond = bond_dev->priv;
3781 mii->val_out = 0;
3782 read_lock_bh(&bond->lock);
3783 read_lock(&bond->curr_slave_lock);
4e140079 3784 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3785 mii->val_out = BMSR_LSTATUS;
3786 }
3787 read_unlock(&bond->curr_slave_lock);
3788 read_unlock_bh(&bond->lock);
3789 }
3790
3791 return 0;
3792 case BOND_INFO_QUERY_OLD:
3793 case SIOCBONDINFOQUERY:
3794 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3795
3796 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3797 return -EFAULT;
3798 }
3799
3800 res = bond_info_query(bond_dev, &k_binfo);
3801 if (res == 0) {
3802 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3803 return -EFAULT;
3804 }
3805 }
3806
3807 return res;
3808 case BOND_SLAVE_INFO_QUERY_OLD:
3809 case SIOCBONDSLAVEINFOQUERY:
3810 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3811
3812 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3813 return -EFAULT;
3814 }
3815
3816 res = bond_slave_info_query(bond_dev, &k_sinfo);
3817 if (res == 0) {
3818 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3819 return -EFAULT;
3820 }
3821 }
3822
3823 return res;
3824 default:
3825 /* Go on */
3826 break;
3827 }
3828
3829 if (!capable(CAP_NET_ADMIN)) {
3830 return -EPERM;
3831 }
3832
b76cdba9 3833 down_write(&(bonding_rwsem));
881d966b 3834 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3835
3836 dprintk("slave_dev=%p: \n", slave_dev);
3837
3838 if (!slave_dev) {
3839 res = -ENODEV;
3840 } else {
3841 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3842 switch (cmd) {
3843 case BOND_ENSLAVE_OLD:
3844 case SIOCBONDENSLAVE:
3845 res = bond_enslave(bond_dev, slave_dev);
3846 break;
3847 case BOND_RELEASE_OLD:
3848 case SIOCBONDRELEASE:
3849 res = bond_release(bond_dev, slave_dev);
3850 break;
3851 case BOND_SETHWADDR_OLD:
3852 case SIOCBONDSETHWADDR:
3853 res = bond_sethwaddr(bond_dev, slave_dev);
3854 break;
3855 case BOND_CHANGE_ACTIVE_OLD:
3856 case SIOCBONDCHANGEACTIVE:
3857 res = bond_ioctl_change_active(bond_dev, slave_dev);
3858 break;
3859 default:
3860 res = -EOPNOTSUPP;
3861 }
3862
3863 dev_put(slave_dev);
3864 }
3865
b76cdba9 3866 up_write(&(bonding_rwsem));
1da177e4
LT		 3867 return res;
3868}
3869
3870static void bond_set_multicast_list(struct net_device *bond_dev)
3871{
3872 struct bonding *bond = bond_dev->priv;
3873 struct dev_mc_list *dmi;
3874
3875 write_lock_bh(&bond->lock);
3876
3877 /*
3878 * Do promisc before checking multicast_mode
3879 */
3880 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
3881 bond_set_promiscuity(bond, 1);
3882 }
3883
3884 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
3885 bond_set_promiscuity(bond, -1);
3886 }
3887
3888 /* set allmulti flag to slaves */
3889 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
3890 bond_set_allmulti(bond, 1);
3891 }
3892
3893 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
3894 bond_set_allmulti(bond, -1);
3895 }
3896
3897 bond->flags = bond_dev->flags;
3898
3899 /* looking for addresses to add to slaves' mc list */
3900 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3901 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
3902 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3903 }
3904 }
3905
3906 /* looking for addresses to delete from slaves' list */
3907 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3908 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
3909 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3910 }
3911 }
3912
3913 /* save master's multicast list */
3914 bond_mc_list_destroy(bond);
3915 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
3916
3917 write_unlock_bh(&bond->lock);
3918}
3919
3920/*
3921 * Change the MTU of all of a master's slaves to match the master
3922 */
3923static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3924{
3925 struct bonding *bond = bond_dev->priv;
3926 struct slave *slave, *stop_at;
3927 int res = 0;
3928 int i;
3929
3930 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
3931 (bond_dev ? bond_dev->name : "None"), new_mtu);
3932
3933 /* Can't hold bond->lock with bh disabled here since
3934 * some base drivers panic. On the other hand we can't
3935 * hold bond->lock without bh disabled because we'll
3936 * deadlock. The only solution is to rely on the fact
3937 * that we're under rtnl_lock here, and the slaves
3938 * list won't change. This doesn't solve the problem
3939 * of setting the slave's MTU while it is
3940 * transmitting, but the assumption is that the base
3941 * driver can handle that.
3942 *
3943 * TODO: figure out a way to safely iterate the slaves
3944 * list, but without holding a lock around the actual
3945 * call to the base driver.
3946 */
3947
3948 bond_for_each_slave(bond, slave, i) {
3949 dprintk("s %p s->p %p c_m %p\n", slave,
3950 slave->prev, slave->dev->change_mtu);
e944ef79 3951
1da177e4
LT		 3952 res = dev_set_mtu(slave->dev, new_mtu);
3953
3954 if (res) {
3955 /* If we failed to set the slave's mtu to the new value
3956 * we must abort the operation even in ACTIVE_BACKUP
3957 * mode, because if we allow the backup slaves to have
3958 * different mtu values than the active slave we'll
3959 * need to change their mtu when doing a failover. That
3960 * means changing their mtu from timer context, which
3961 * is probably not a good idea.
3962 */
3963 dprintk("err %d %s\n", res, slave->dev->name);
3964 goto unwind;
3965 }
3966 }
3967
3968 bond_dev->mtu = new_mtu;
3969
3970 return 0;
3971
3972unwind:
3973 /* unwind from head to the slave that failed */
3974 stop_at = slave;
3975 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3976 int tmp_res;
3977
3978 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3979 if (tmp_res) {
3980 dprintk("unwind err %d dev %s\n", tmp_res,
3981 slave->dev->name);
3982 }
3983 }
3984
3985 return res;
3986}
3987
3988/*
3989 * Change HW address
3990 *
3991 * Note that many devices must be down to change the HW address, and
3992 * downing the master releases all slaves. We can make bonds full of
3993 * bonding devices to test this, however.
3994 */
3995static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3996{
3997 struct bonding *bond = bond_dev->priv;
3998 struct sockaddr *sa = addr, tmp_sa;
3999 struct slave *slave, *stop_at;
4000 int res = 0;
4001 int i;
4002
4003 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4004
dd957c57
JV		 4005 /*
4006 * If fail_over_mac is enabled, do nothing and return success.
4007 * Returning an error causes ifenslave to fail.
4008 */
4009 if (bond->params.fail_over_mac)
4010 return 0;
2ab82852 4011
1da177e4
LT		 4012 if (!is_valid_ether_addr(sa->sa_data)) {
4013 return -EADDRNOTAVAIL;
4014 }
4015
4016 /* Can't hold bond->lock with bh disabled here since
4017 * some base drivers panic. On the other hand we can't
4018 * hold bond->lock without bh disabled because we'll
4019 * deadlock. The only solution is to rely on the fact
4020 * that we're under rtnl_lock here, and the slaves
4021 * list won't change. This doesn't solve the problem
4022 * of setting the slave's hw address while it is
4023 * transmitting, but the assumption is that the base
4024 * driver can handle that.
4025 *
4026 * TODO: figure out a way to safely iterate the slaves
4027 * list, but without holding a lock around the actual
4028 * call to the base driver.
4029 */
4030
4031 bond_for_each_slave(bond, slave, i) {
4032 dprintk("slave %p %s\n", slave, slave->dev->name);
4033
4034 if (slave->dev->set_mac_address == NULL) {
4035 res = -EOPNOTSUPP;
4036 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4037 goto unwind;
4038 }
4039
4040 res = dev_set_mac_address(slave->dev, addr);
4041 if (res) {
4042 /* TODO: consider downing the slave
4043 * and retry ?
4044 * User should expect communications
4045 * breakage anyway until ARP finish
4046 * updating, so...
4047 */
4048 dprintk("err %d %s\n", res, slave->dev->name);
4049 goto unwind;
4050 }
4051 }
4052
4053 /* success */
4054 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4055 return 0;
4056
4057unwind:
4058 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4059 tmp_sa.sa_family = bond_dev->type;
4060
4061 /* unwind from head to the slave that failed */
4062 stop_at = slave;
4063 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4064 int tmp_res;
4065
4066 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4067 if (tmp_res) {
4068 dprintk("unwind err %d dev %s\n", tmp_res,
4069 slave->dev->name);
4070 }
4071 }
4072
4073 return res;
4074}
4075
4076static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4077{
4078 struct bonding *bond = bond_dev->priv;
4079 struct slave *slave, *start_at;
4080 int i;
4081 int res = 1;
4082
4083 read_lock(&bond->lock);
4084
4085 if (!BOND_IS_OK(bond)) {
4086 goto out;
4087 }
4088
4089 read_lock(&bond->curr_slave_lock);
4090 slave = start_at = bond->curr_active_slave;
4091 read_unlock(&bond->curr_slave_lock);
4092
4093 if (!slave) {
4094 goto out;
4095 }
4096
4097 bond_for_each_slave_from(bond, slave, i, start_at) {
4098 if (IS_UP(slave->dev) &&
4099 (slave->link == BOND_LINK_UP) &&
4100 (slave->state == BOND_STATE_ACTIVE)) {
4101 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4102
4103 write_lock(&bond->curr_slave_lock);
4104 bond->curr_active_slave = slave->next;
4105 write_unlock(&bond->curr_slave_lock);
4106
4107 break;
4108 }
4109 }
4110
4111
4112out:
4113 if (res) {
4114 /* no suitable interface, frame not sent */
4115 dev_kfree_skb(skb);
4116 }
4117 read_unlock(&bond->lock);
4118 return 0;
4119}
4120
075897ce 4121
1da177e4
LT		 4122/*
4123 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4124 * the bond has a usable interface.
4125 */
4126static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4127{
4128 struct bonding *bond = bond_dev->priv;
4129 int res = 1;
4130
1da177e4
LT		 4131 read_lock(&bond->lock);
4132 read_lock(&bond->curr_slave_lock);
4133
4134 if (!BOND_IS_OK(bond)) {
4135 goto out;
4136 }
4137
075897ce
JL		 4138 if (!bond->curr_active_slave)
4139 goto out;
4140
075897ce
JL		 4141 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4142
1da177e4
LT		 4143out:
4144 if (res) {
4145 /* no suitable interface, frame not sent */
4146 dev_kfree_skb(skb);
4147 }
4148 read_unlock(&bond->curr_slave_lock);
4149 read_unlock(&bond->lock);
4150 return 0;
4151}
4152
4153/*
169a3e66
JV		 4154 * In bond_xmit_xor() , we determine the output device by using a pre-
4155 * determined xmit_hash_policy(), If the selected device is not enabled,
4156 * find the next active slave.
1da177e4
LT		 4157 */
4158static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4159{
4160 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4161 struct slave *slave, *start_at;
4162 int slave_no;
4163 int i;
4164 int res = 1;
4165
4166 read_lock(&bond->lock);
4167
4168 if (!BOND_IS_OK(bond)) {
4169 goto out;
4170 }
4171
169a3e66 4172 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4173
4174 bond_for_each_slave(bond, slave, i) {
4175 slave_no--;
4176 if (slave_no < 0) {
4177 break;
4178 }
4179 }
4180
4181 start_at = slave;
4182
4183 bond_for_each_slave_from(bond, slave, i, start_at) {
4184 if (IS_UP(slave->dev) &&
4185 (slave->link == BOND_LINK_UP) &&
4186 (slave->state == BOND_STATE_ACTIVE)) {
4187 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4188 break;
4189 }
4190 }
4191
4192out:
4193 if (res) {
4194 /* no suitable interface, frame not sent */
4195 dev_kfree_skb(skb);
4196 }
4197 read_unlock(&bond->lock);
4198 return 0;
4199}
4200
4201/*
4202 * in broadcast mode, we send everything to all usable interfaces.
4203 */
4204static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4205{
4206 struct bonding *bond = bond_dev->priv;
4207 struct slave *slave, *start_at;
4208 struct net_device *tx_dev = NULL;
4209 int i;
4210 int res = 1;
4211
4212 read_lock(&bond->lock);
4213
4214 if (!BOND_IS_OK(bond)) {
4215 goto out;
4216 }
4217
4218 read_lock(&bond->curr_slave_lock);
4219 start_at = bond->curr_active_slave;
4220 read_unlock(&bond->curr_slave_lock);
4221
4222 if (!start_at) {
4223 goto out;
4224 }
4225
4226 bond_for_each_slave_from(bond, slave, i, start_at) {
4227 if (IS_UP(slave->dev) &&
4228 (slave->link == BOND_LINK_UP) &&
4229 (slave->state == BOND_STATE_ACTIVE)) {
4230 if (tx_dev) {
4231 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4232 if (!skb2) {
4233 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4234 ": %s: Error: bond_xmit_broadcast(): "
4235 "skb_clone() failed\n",
4236 bond_dev->name);
1da177e4
LT		 4237 continue;
4238 }
4239
4240 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4241 if (res) {
4242 dev_kfree_skb(skb2);
4243 continue;
4244 }
4245 }
4246 tx_dev = slave->dev;
4247 }
4248 }
4249
4250 if (tx_dev) {
4251 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4252 }
4253
4254out:
4255 if (res) {
4256 /* no suitable interface, frame not sent */
4257 dev_kfree_skb(skb);
4258 }
4259 /* frame sent to all suitable interfaces */
4260 read_unlock(&bond->lock);
4261 return 0;
4262}
4263
4264/*------------------------- Device initialization ---------------------------*/
4265
4266/*
4267 * set bond mode specific net device operations
4268 */
a77b5325 4269void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4270{
169a3e66
JV		 4271 struct net_device *bond_dev = bond->dev;
4272
1da177e4
LT		 4273 switch (mode) {
4274 case BOND_MODE_ROUNDROBIN:
4275 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4276 break;
4277 case BOND_MODE_ACTIVEBACKUP:
4278 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4279 break;
4280 case BOND_MODE_XOR:
4281 bond_dev->hard_start_xmit = bond_xmit_xor;
169a3e66
JV		 4282 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4283 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4284 else
4285 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4
LT		 4286 break;
4287 case BOND_MODE_BROADCAST:
4288 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4289 break;
4290 case BOND_MODE_8023AD:
8f903c70 4291 bond_set_master_3ad_flags(bond);
1da177e4 4292 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
169a3e66
JV		 4293 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4294 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4295 else
4296 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4 4297 break;
1da177e4 4298 case BOND_MODE_ALB:
8f903c70
JV		 4299 bond_set_master_alb_flags(bond);
4300 /* FALLTHRU */
4301 case BOND_MODE_TLB:
1da177e4
LT		 4302 bond_dev->hard_start_xmit = bond_alb_xmit;
4303 bond_dev->set_mac_address = bond_alb_set_mac_address;
4304 break;
4305 default:
4306 /* Should never happen, mode already checked */
4307 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4308 ": %s: Error: Unknown bonding mode %d\n",
4309 bond_dev->name,
1da177e4
LT		 4310 mode);
4311 break;
4312 }
4313}
4314
217df670
JV		 4315static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4316 struct ethtool_drvinfo *drvinfo)
4317{
4318 strncpy(drvinfo->driver, DRV_NAME, 32);
4319 strncpy(drvinfo->version, DRV_VERSION, 32);
4320 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4321}
4322
7282d491 4323static const struct ethtool_ops bond_ethtool_ops = {
217df670 4324 .get_drvinfo = bond_ethtool_get_drvinfo,
8531c5ff
AK		 4325};
4326
1da177e4
LT		 4327/*
4328 * Does not allocate but creates a /proc entry.
4329 * Allowed to fail.
4330 */
3c535952 4331static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4332{
4333 struct bonding *bond = bond_dev->priv;
4334
4335 dprintk("Begin bond_init for %s\n", bond_dev->name);
4336
4337 /* initialize rwlocks */
4338 rwlock_init(&bond->lock);
4339 rwlock_init(&bond->curr_slave_lock);
4340
4341 bond->params = *params; /* copy params struct */
4342
4343 /* Initialize pointers */
4344 bond->first_slave = NULL;
4345 bond->curr_active_slave = NULL;
4346 bond->current_arp_slave = NULL;
4347 bond->primary_slave = NULL;
4348 bond->dev = bond_dev;
1053f62c 4349 bond->send_grat_arp = 0;
d90a162a 4350 bond->setup_by_slave = 0;
1da177e4
LT		 4351 INIT_LIST_HEAD(&bond->vlan_list);
4352
4353 /* Initialize the device entry points */
4354 bond_dev->open = bond_open;
4355 bond_dev->stop = bond_close;
4356 bond_dev->get_stats = bond_get_stats;
4357 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4358 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4359 bond_dev->set_multicast_list = bond_set_multicast_list;
4360 bond_dev->change_mtu = bond_change_mtu;
4361 bond_dev->set_mac_address = bond_set_mac_address;
4362
169a3e66 4363 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4364
4365 bond_dev->destructor = free_netdev;
4366
4367 /* Initialize the device options */
4368 bond_dev->tx_queue_len = 0;
4369 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4370 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4371
4372 /* At first, we block adding VLANs. That's the only way to
4373 * prevent problems that occur when adding VLANs over an
4374 * empty bond. The block will be removed once non-challenged
4375 * slaves are enslaved.
4376 */
4377 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4378
932ff279 4379 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4380 * transmitting */
4381 bond_dev->features |= NETIF_F_LLTX;
4382
4383 /* By default, we declare the bond to be fully
4384 * VLAN hardware accelerated capable. Special
4385 * care is taken in the various xmit functions
4386 * when there are slaves that are not hw accel
4387 * capable
4388 */
4389 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4390 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4391 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4392 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4393 NETIF_F_HW_VLAN_RX |
4394 NETIF_F_HW_VLAN_FILTER);
4395
4396#ifdef CONFIG_PROC_FS
4397 bond_create_proc_entry(bond);
4398#endif
1da177e4
LT		 4399 list_add_tail(&bond->bond_list, &bond_dev_list);
4400
4401 return 0;
4402}
4403
4404/* De-initialize device specific data.
4405 * Caller must hold rtnl_lock.
4406 */
a77b5325 4407void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4408{
4409 struct bonding *bond = bond_dev->priv;
4410
4411 list_del(&bond->bond_list);
4412
4413#ifdef CONFIG_PROC_FS
4414 bond_remove_proc_entry(bond);
4415#endif
4416}
4417
4418/* Unregister and free all bond devices.
4419 * Caller must hold rtnl_lock.
4420 */
4421static void bond_free_all(void)
4422{
4423 struct bonding *bond, *nxt;
4424
4425 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4426 struct net_device *bond_dev = bond->dev;
4427
70298705 4428 bond_mc_list_destroy(bond);
4429 /* Release the bonded slaves */
4430 bond_release_all(bond_dev);
1da177e4 4431 bond_deinit(bond_dev);
3201e656 4432 unregister_netdevice(bond_dev);
1da177e4
LT		 4433 }
4434
4435#ifdef CONFIG_PROC_FS
4436 bond_destroy_proc_dir();
4437#endif
4438}
4439
4440/*------------------------- Module initialization ---------------------------*/
4441
4442/*
4443 * Convert string input module parms. Accept either the
4444 * number of the mode or its string name.
4445 */
a77b5325 4446int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
1da177e4
LT		 4447{
4448 int i;
4449
4450 for (i = 0; tbl[i].modename; i++) {
4451 if ((isdigit(*mode_arg) &&
4452 tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
4453 (strncmp(mode_arg, tbl[i].modename,
4454 strlen(tbl[i].modename)) == 0)) {
4455 return tbl[i].mode;
4456 }
4457 }
4458
4459 return -1;
4460}
4461
4462static int bond_check_params(struct bond_params *params)
4463{
f5b2b966
JV		 4464 int arp_validate_value;
4465
1da177e4
LT		 4466 /*
4467 * Convert string parameters.
4468 */
4469 if (mode) {
4470 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4471 if (bond_mode == -1) {
4472 printk(KERN_ERR DRV_NAME
4473 ": Error: Invalid bonding mode \"%s\"\n",
4474 mode == NULL ? "NULL" : mode);
4475 return -EINVAL;
4476 }
4477 }
4478
169a3e66
JV		 4479 if (xmit_hash_policy) {
4480 if ((bond_mode != BOND_MODE_XOR) &&
4481 (bond_mode != BOND_MODE_8023AD)) {
4482 printk(KERN_INFO DRV_NAME
4483 ": xor_mode param is irrelevant in mode %s\n",
4484 bond_mode_name(bond_mode));
4485 } else {
4486 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4487 xmit_hashtype_tbl);
4488 if (xmit_hashtype == -1) {
4489 printk(KERN_ERR DRV_NAME
4490 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4491 xmit_hash_policy == NULL ? "NULL" :
4492 xmit_hash_policy);
4493 return -EINVAL;
4494 }
4495 }
4496 }
4497
1da177e4
LT		 4498 if (lacp_rate) {
4499 if (bond_mode != BOND_MODE_8023AD) {
4500 printk(KERN_INFO DRV_NAME
4501 ": lacp_rate param is irrelevant in mode %s\n",
4502 bond_mode_name(bond_mode));
4503 } else {
4504 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4505 if (lacp_fast == -1) {
4506 printk(KERN_ERR DRV_NAME
4507 ": Error: Invalid lacp rate \"%s\"\n",
4508 lacp_rate == NULL ? "NULL" : lacp_rate);
4509 return -EINVAL;
4510 }
4511 }
4512 }
4513
4514 if (max_bonds < 1 || max_bonds > INT_MAX) {
4515 printk(KERN_WARNING DRV_NAME
4516 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4517 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
1da177e4
LT		 4518 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4519 max_bonds = BOND_DEFAULT_MAX_BONDS;
4520 }
4521
4522 if (miimon < 0) {
4523 printk(KERN_WARNING DRV_NAME
4524 ": Warning: miimon module parameter (%d), "
4525 "not in range 0-%d, so it was reset to %d\n",
4526 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4527 miimon = BOND_LINK_MON_INTERV;
4528 }
4529
4530 if (updelay < 0) {
4531 printk(KERN_WARNING DRV_NAME
4532 ": Warning: updelay module parameter (%d), "
4533 "not in range 0-%d, so it was reset to 0\n",
4534 updelay, INT_MAX);
4535 updelay = 0;
4536 }
4537
4538 if (downdelay < 0) {
4539 printk(KERN_WARNING DRV_NAME
4540 ": Warning: downdelay module parameter (%d), "
4541 "not in range 0-%d, so it was reset to 0\n",
4542 downdelay, INT_MAX);
4543 downdelay = 0;
4544 }
4545
4546 if ((use_carrier != 0) && (use_carrier != 1)) {
4547 printk(KERN_WARNING DRV_NAME
4548 ": Warning: use_carrier module parameter (%d), "
4549 "not of valid value (0/1), so it was set to 1\n",
4550 use_carrier);
4551 use_carrier = 1;
4552 }
4553
4554 /* reset values for 802.3ad */
4555 if (bond_mode == BOND_MODE_8023AD) {
4556 if (!miimon) {
4557 printk(KERN_WARNING DRV_NAME
4558 ": Warning: miimon must be specified, "
4559 "otherwise bonding will not detect link "
4560 "failure, speed and duplex which are "
4561 "essential for 802.3ad operation\n");
4562 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4563 miimon = 100;
4564 }
4565 }
4566
4567 /* reset values for TLB/ALB */
4568 if ((bond_mode == BOND_MODE_TLB) ||
4569 (bond_mode == BOND_MODE_ALB)) {
4570 if (!miimon) {
4571 printk(KERN_WARNING DRV_NAME
4572 ": Warning: miimon must be specified, "
4573 "otherwise bonding will not detect link "
4574 "failure and link speed which are essential "
4575 "for TLB/ALB load balancing\n");
4576 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4577 miimon = 100;
4578 }
4579 }
4580
4581 if (bond_mode == BOND_MODE_ALB) {
4582 printk(KERN_NOTICE DRV_NAME
4583 ": In ALB mode you might experience client "
4584 "disconnections upon reconnection of a link if the "
4585 "bonding module updelay parameter (%d msec) is "
4586 "incompatible with the forwarding delay time of the "
4587 "switch\n",
4588 updelay);
4589 }
4590
4591 if (!miimon) {
4592 if (updelay || downdelay) {
4593 /* just warn the user the up/down delay will have
4594 * no effect since miimon is zero...
4595 */
4596 printk(KERN_WARNING DRV_NAME
4597 ": Warning: miimon module parameter not set "
4598 "and updelay (%d) or downdelay (%d) module "
4599 "parameter is set; updelay and downdelay have "
4600 "no effect unless miimon is set\n",
4601 updelay, downdelay);
4602 }
4603 } else {
4604 /* don't allow arp monitoring */
4605 if (arp_interval) {
4606 printk(KERN_WARNING DRV_NAME
4607 ": Warning: miimon (%d) and arp_interval (%d) "
4608 "can't be used simultaneously, disabling ARP "
4609 "monitoring\n",
4610 miimon, arp_interval);
4611 arp_interval = 0;
4612 }
4613
4614 if ((updelay % miimon) != 0) {
4615 printk(KERN_WARNING DRV_NAME
4616 ": Warning: updelay (%d) is not a multiple "
4617 "of miimon (%d), updelay rounded to %d ms\n",
4618 updelay, miimon, (updelay / miimon) * miimon);
4619 }
4620
4621 updelay /= miimon;
4622
4623 if ((downdelay % miimon) != 0) {
4624 printk(KERN_WARNING DRV_NAME
4625 ": Warning: downdelay (%d) is not a multiple "
4626 "of miimon (%d), downdelay rounded to %d ms\n",
4627 downdelay, miimon,
4628 (downdelay / miimon) * miimon);
4629 }
4630
4631 downdelay /= miimon;
4632 }
4633
4634 if (arp_interval < 0) {
4635 printk(KERN_WARNING DRV_NAME
4636 ": Warning: arp_interval module parameter (%d) "
4637 ", not in range 0-%d, so it was reset to %d\n",
4638 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4639 arp_interval = BOND_LINK_ARP_INTERV;
4640 }
4641
4642 for (arp_ip_count = 0;
4643 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4644 arp_ip_count++) {
4645 /* not complete check, but should be good enough to
4646 catch mistakes */
4647 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4648 printk(KERN_WARNING DRV_NAME
4649 ": Warning: bad arp_ip_target module parameter "
4650 "(%s), ARP monitoring will not be performed\n",
4651 arp_ip_target[arp_ip_count]);
4652 arp_interval = 0;
4653 } else {
d3bb52b0 4654 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4655 arp_target[arp_ip_count] = ip;
4656 }
4657 }
4658
4659 if (arp_interval && !arp_ip_count) {
4660 /* don't allow arping if no arp_ip_target given... */
4661 printk(KERN_WARNING DRV_NAME
4662 ": Warning: arp_interval module parameter (%d) "
4663 "specified without providing an arp_ip_target "
4664 "parameter, arp_interval was reset to 0\n",
4665 arp_interval);
4666 arp_interval = 0;
4667 }
4668
f5b2b966
JV		 4669 if (arp_validate) {
4670 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4671 printk(KERN_ERR DRV_NAME
4672 ": arp_validate only supported in active-backup mode\n");
4673 return -EINVAL;
4674 }
4675 if (!arp_interval) {
4676 printk(KERN_ERR DRV_NAME
4677 ": arp_validate requires arp_interval\n");
4678 return -EINVAL;
4679 }
4680
4681 arp_validate_value = bond_parse_parm(arp_validate,
4682 arp_validate_tbl);
4683 if (arp_validate_value == -1) {
4684 printk(KERN_ERR DRV_NAME
4685 ": Error: invalid arp_validate \"%s\"\n",
4686 arp_validate == NULL ? "NULL" : arp_validate);
4687 return -EINVAL;
4688 }
4689 } else
4690 arp_validate_value = 0;
4691
1da177e4
LT		 4692 if (miimon) {
4693 printk(KERN_INFO DRV_NAME
4694 ": MII link monitoring set to %d ms\n",
4695 miimon);
4696 } else if (arp_interval) {
4697 int i;
4698
4699 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4700 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4701 arp_interval,
4702 arp_validate_tbl[arp_validate_value].modename,
4703 arp_ip_count);
1da177e4
LT		 4704
4705 for (i = 0; i < arp_ip_count; i++)
4706 printk (" %s", arp_ip_target[i]);
4707
4708 printk("\n");
4709
4710 } else {
4711 /* miimon and arp_interval not set, we need one so things
4712 * work as expected, see bonding.txt for details
4713 */
4714 printk(KERN_WARNING DRV_NAME
4715 ": Warning: either miimon or arp_interval and "
4716 "arp_ip_target module parameters must be specified, "
4717 "otherwise bonding will not detect link failures! see "
4718 "bonding.txt for details.\n");
4719 }
4720
4721 if (primary && !USES_PRIMARY(bond_mode)) {
4722 /* currently, using a primary only makes sense
4723 * in active backup, TLB or ALB modes
4724 */
4725 printk(KERN_WARNING DRV_NAME
4726 ": Warning: %s primary device specified but has no "
4727 "effect in %s mode\n",
4728 primary, bond_mode_name(bond_mode));
4729 primary = NULL;
4730 }
4731
dd957c57
JV		 4732 if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
4733 printk(KERN_WARNING DRV_NAME
4734 ": Warning: fail_over_mac only affects "
4735 "active-backup mode.\n");
4736
1da177e4
LT		 4737 /* fill params struct with the proper values */
4738 params->mode = bond_mode;
169a3e66 4739 params->xmit_policy = xmit_hashtype;
1da177e4
LT		 4740 params->miimon = miimon;
4741 params->arp_interval = arp_interval;
f5b2b966 4742 params->arp_validate = arp_validate_value;
1da177e4
LT		 4743 params->updelay = updelay;
4744 params->downdelay = downdelay;
4745 params->use_carrier = use_carrier;
4746 params->lacp_fast = lacp_fast;
4747 params->primary[0] = 0;
dd957c57 4748 params->fail_over_mac = fail_over_mac;
1da177e4
LT		 4749
4750 if (primary) {
4751 strncpy(params->primary, primary, IFNAMSIZ);
4752 params->primary[IFNAMSIZ - 1] = 0;
4753 }
4754
4755 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4756
4757 return 0;
4758}
4759
0daa2303
PZ		 4760static struct lock_class_key bonding_netdev_xmit_lock_key;
4761
dfe60397 4762/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 4763 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 4764 * Caller must NOT hold rtnl_lock; we need to release it here before we
4765 * set up our sysfs entries.
4766 */
4767int bond_create(char *name, struct bond_params *params, struct bonding **newbond)
4768{
4769 struct net_device *bond_dev;
4770 int res;
4771
4772 rtnl_lock();
e4b91c48
JV		 4773 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
4774 ether_setup);
dfe60397
MW		 4775 if (!bond_dev) {
4776 printk(KERN_ERR DRV_NAME
4777 ": %s: eek! can't alloc netdev!\n",
4778 name);
4779 res = -ENOMEM;
4780 goto out_rtnl;
4781 }
4782
e4b91c48
JV		 4783 if (!name) {
4784 res = dev_alloc_name(bond_dev, "bond%d");
4785 if (res < 0)
4786 goto out_netdev;
4787 }
4788
dfe60397
MW		 4789 /* bond_init() must be called after dev_alloc_name() (for the
4790 * /proc files), but before register_netdevice(), because we
4791 * need to set function pointers.
4792 */
4793
4794 res = bond_init(bond_dev, params);
4795 if (res < 0) {
4796 goto out_netdev;
4797 }
4798
dfe60397
MW		 4799 res = register_netdevice(bond_dev);
4800 if (res < 0) {
4801 goto out_bond;
4802 }
0daa2303
PZ		 4803
4804 lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
4805
dfe60397
MW		 4806 if (newbond)
4807 *newbond = bond_dev->priv;
4808
ff59c456
JV		 4809 netif_carrier_off(bond_dev);
4810
dfe60397 4811 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 4812 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 4813 if (res < 0) {
4814 rtnl_lock();
4815 goto out_bond;
4816 }
4817
4818 return 0;
4819
dfe60397
MW		 4820out_bond:
4821 bond_deinit(bond_dev);
4822out_netdev:
4823 free_netdev(bond_dev);
4824out_rtnl:
4825 rtnl_unlock();
dfe60397
MW		 4826 return res;
4827}
4828
1da177e4
LT		 4829static int __init bonding_init(void)
4830{
1da177e4
LT		 4831 int i;
4832 int res;
4833
4834 printk(KERN_INFO "%s", version);
4835
dfe60397 4836 res = bond_check_params(&bonding_defaults);
1da177e4 4837 if (res) {
dfe60397 4838 goto out;
1da177e4
LT		 4839 }
4840
1da177e4
LT		 4841#ifdef CONFIG_PROC_FS
4842 bond_create_proc_dir();
4843#endif
1da177e4 4844 for (i = 0; i < max_bonds; i++) {
e4b91c48 4845 res = bond_create(NULL, &bonding_defaults, NULL);
dfe60397
MW		 4846 if (res)
4847 goto err;
1da177e4
LT		 4848 }
4849
b76cdba9
MW		 4850 res = bond_create_sysfs();
4851 if (res)
4852 goto err;
4853
1da177e4 4854 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4855 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 4856
dfe60397
MW		 4857 goto out;
4858err:
40abc270 4859 rtnl_lock();
1da177e4 4860 bond_free_all();
b76cdba9 4861 bond_destroy_sysfs();
1da177e4 4862 rtnl_unlock();
dfe60397 4863out:
1da177e4 4864 return res;
dfe60397 4865
1da177e4
LT		 4866}
4867
4868static void __exit bonding_exit(void)
4869{
4870 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4871 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4
LT		 4872
4873 rtnl_lock();
4874 bond_free_all();
b76cdba9 4875 bond_destroy_sysfs();
1da177e4
LT		 4876 rtnl_unlock();
4877}
4878
4879module_init(bonding_init);
4880module_exit(bonding_exit);
4881MODULE_LICENSE("GPL");
4882MODULE_VERSION(DRV_VERSION);
4883MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4884MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4885MODULE_SUPPORTED_DEVICE("most ethernet devices");
4886
4887/*
4888 * Local variables:
4889 * c-indent-level: 8
4890 * c-basic-offset: 8
4891 * tab-width: 8
4892 * End:
4893 */
4894
Clone of davem's net-next-2.6 tree