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e1000e: don't poke PHY registers to retreive link status
[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
MS		 1265 bond_dev->neigh_setup = slave_dev->neigh_setup;
1266
1267 bond_dev->type = slave_dev->type;
1268 bond_dev->hard_header_len = slave_dev->hard_header_len;
1269 bond_dev->addr_len = slave_dev->addr_len;
1270
1271 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1272 slave_dev->addr_len);
d90a162a 1273 bond->setup_by_slave = 1;
872254dd
MS		 1274}
1275
1da177e4 1276/* enslave device <slave> to bond device <master> */
a77b5325 1277int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1278{
1279 struct bonding *bond = bond_dev->priv;
1280 struct slave *new_slave = NULL;
1281 struct dev_mc_list *dmi;
1282 struct sockaddr addr;
1283 int link_reporting;
1284 int old_features = bond_dev->features;
1285 int res = 0;
1286
552709d5 1287 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1288 slave_dev->do_ioctl == NULL) {
1da177e4 1289 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1290 ": %s: Warning: no link monitoring support for %s\n",
1291 bond_dev->name, slave_dev->name);
1da177e4
LT		 1292 }
1293
1294 /* bond must be initialized by bond_open() before enslaving */
1295 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1296 printk(KERN_WARNING DRV_NAME
1297 " %s: master_dev is not up in bond_enslave\n",
1298 bond_dev->name);
1da177e4
LT		 1299 }
1300
1301 /* already enslaved */
1302 if (slave_dev->flags & IFF_SLAVE) {
1303 dprintk("Error, Device was already enslaved\n");
1304 return -EBUSY;
1305 }
1306
1307 /* vlan challenged mutual exclusion */
1308 /* no need to lock since we're protected by rtnl_lock */
1309 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1310 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1311 if (!list_empty(&bond->vlan_list)) {
1312 printk(KERN_ERR DRV_NAME
4e0952c7 1313 ": %s: Error: cannot enslave VLAN "
1da177e4 1314 "challenged slave %s on VLAN enabled "
4e0952c7 1315 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1316 bond_dev->name);
1317 return -EPERM;
1318 } else {
1319 printk(KERN_WARNING DRV_NAME
4e0952c7 1320 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1321 "slave %s. Adding VLANs will be blocked as "
1322 "long as %s is part of bond %s\n",
4e0952c7 1323 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1324 bond_dev->name);
1325 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1326 }
1327 } else {
1328 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1329 if (bond->slave_cnt == 0) {
1330 /* First slave, and it is not VLAN challenged,
1331 * so remove the block of adding VLANs over the bond.
1332 */
1333 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1334 }
1335 }
1336
217df670
JV		 1337 /*
1338 * Old ifenslave binaries are no longer supported. These can
1339 * be identified with moderate accurary by the state of the slave:
1340 * the current ifenslave will set the interface down prior to
1341 * enslaving it; the old ifenslave will not.
1342 */
1343 if ((slave_dev->flags & IFF_UP)) {
1344 printk(KERN_ERR DRV_NAME ": %s is up. "
1345 "This may be due to an out of date ifenslave.\n",
1346 slave_dev->name);
1347 res = -EPERM;
1348 goto err_undo_flags;
1349 }
1da177e4 1350
872254dd
MS		 1351 /* set bonding device ether type by slave - bonding netdevices are
1352 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1353 * there is a need to override some of the type dependent attribs/funcs.
1354 *
1355 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1356 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1357 */
1358 if (bond->slave_cnt == 0) {
1359 if (slave_dev->type != ARPHRD_ETHER)
1360 bond_setup_by_slave(bond_dev, slave_dev);
1361 } else if (bond_dev->type != slave_dev->type) {
1362 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1363 "from other slaves (%d), can not enslave it.\n",
1364 slave_dev->name,
1365 slave_dev->type, bond_dev->type);
1366 res = -EINVAL;
1367 goto err_undo_flags;
1368 }
1369
217df670 1370 if (slave_dev->set_mac_address == NULL) {
2ab82852
MS		 1371 if (bond->slave_cnt == 0) {
1372 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1373 ": %s: Warning: The first slave device "
1374 "specified does not support setting the MAC "
1375 "address. Enabling the fail_over_mac option.",
1376 bond_dev->name);
1377 bond->params.fail_over_mac = 1;
1378 } else if (!bond->params.fail_over_mac) {
2ab82852 1379 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1380 ": %s: Error: The slave device specified "
1381 "does not support setting the MAC address, "
1382 "but fail_over_mac is not enabled.\n"
2ab82852
MS		 1383 , bond_dev->name);
1384 res = -EOPNOTSUPP;
1385 goto err_undo_flags;
1386 }
1da177e4
LT		 1387 }
1388
243cb4e5 1389 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1390 if (!new_slave) {
1391 res = -ENOMEM;
1392 goto err_undo_flags;
1393 }
1394
1da177e4
LT		 1395 /* save slave's original flags before calling
1396 * netdev_set_master and dev_open
1397 */
1398 new_slave->original_flags = slave_dev->flags;
1399
217df670
JV		 1400 /*
1401 * Save slave's original ("permanent") mac address for modes
1402 * that need it, and for restoring it upon release, and then
1403 * set it to the master's address
1404 */
1405 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1406
dd957c57 1407 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1408 /*
1409 * Set slave to master's mac address. The application already
1410 * set the master's mac address to that of the first slave
1411 */
1412 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1413 addr.sa_family = slave_dev->type;
1414 res = dev_set_mac_address(slave_dev, &addr);
1415 if (res) {
1416 dprintk("Error %d calling set_mac_address\n", res);
1417 goto err_free;
1418 }
217df670 1419 }
1da177e4 1420
c2edacf8
JV		 1421 res = netdev_set_master(slave_dev, bond_dev);
1422 if (res) {
1423 dprintk("Error %d calling netdev_set_master\n", res);
1424 goto err_close;
1425 }
217df670
JV		 1426 /* open the slave since the application closed it */
1427 res = dev_open(slave_dev);
1428 if (res) {
1429 dprintk("Openning slave %s failed\n", slave_dev->name);
1430 goto err_restore_mac;
1da177e4
LT		 1431 }
1432
1da177e4 1433 new_slave->dev = slave_dev;
0b680e75 1434 slave_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 1435
1436 if ((bond->params.mode == BOND_MODE_TLB) ||
1437 (bond->params.mode == BOND_MODE_ALB)) {
1438 /* bond_alb_init_slave() must be called before all other stages since
1439 * it might fail and we do not want to have to undo everything
1440 */
1441 res = bond_alb_init_slave(bond, new_slave);
1442 if (res) {
1443 goto err_unset_master;
1444 }
1445 }
1446
1447 /* If the mode USES_PRIMARY, then the new slave gets the
1448 * master's promisc (and mc) settings only if it becomes the
1449 * curr_active_slave, and that is taken care of later when calling
1450 * bond_change_active()
1451 */
1452 if (!USES_PRIMARY(bond->params.mode)) {
1453 /* set promiscuity level to new slave */
1454 if (bond_dev->flags & IFF_PROMISC) {
1455 dev_set_promiscuity(slave_dev, 1);
1456 }
1457
1458 /* set allmulti level to new slave */
1459 if (bond_dev->flags & IFF_ALLMULTI) {
1460 dev_set_allmulti(slave_dev, 1);
1461 }
1462
1463 /* upload master's mc_list to new slave */
1464 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1465 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1466 }
1467 }
1468
1469 if (bond->params.mode == BOND_MODE_8023AD) {
1470 /* add lacpdu mc addr to mc list */
1471 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1472
1473 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1474 }
1475
1476 bond_add_vlans_on_slave(bond, slave_dev);
1477
1478 write_lock_bh(&bond->lock);
1479
1480 bond_attach_slave(bond, new_slave);
1481
1482 new_slave->delay = 0;
1483 new_slave->link_failure_count = 0;
1484
8531c5ff
AK		 1485 bond_compute_features(bond);
1486
f5b2b966
JV		 1487 new_slave->last_arp_rx = jiffies;
1488
1da177e4
LT		 1489 if (bond->params.miimon && !bond->params.use_carrier) {
1490 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1491
1492 if ((link_reporting == -1) && !bond->params.arp_interval) {
1493 /*
1494 * miimon is set but a bonded network driver
1495 * does not support ETHTOOL/MII and
1496 * arp_interval is not set. Note: if
1497 * use_carrier is enabled, we will never go
1498 * here (because netif_carrier is always
1499 * supported); thus, we don't need to change
1500 * the messages for netif_carrier.
1501 */
1502 printk(KERN_WARNING DRV_NAME
4e0952c7 1503 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1504 "available for interface %s, and "
1505 "arp_interval/arp_ip_target module parameters "
1506 "not specified, thus bonding will not detect "
1507 "link failures! see bonding.txt for details.\n",
4e0952c7 1508 bond_dev->name, slave_dev->name);
1da177e4
LT		 1509 } else if (link_reporting == -1) {
1510 /* unable get link status using mii/ethtool */
1511 printk(KERN_WARNING DRV_NAME
4e0952c7 1512 ": %s: Warning: can't get link status from "
1da177e4
LT		 1513 "interface %s; the network driver associated "
1514 "with this interface does not support MII or "
1515 "ETHTOOL link status reporting, thus miimon "
1516 "has no effect on this interface.\n",
4e0952c7 1517 bond_dev->name, slave_dev->name);
1da177e4
LT		 1518 }
1519 }
1520
1521 /* check for initial state */
1522 if (!bond->params.miimon ||
1523 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1524 if (bond->params.updelay) {
1525 dprintk("Initial state of slave_dev is "
1526 "BOND_LINK_BACK\n");
1527 new_slave->link = BOND_LINK_BACK;
1528 new_slave->delay = bond->params.updelay;
1529 } else {
1530 dprintk("Initial state of slave_dev is "
1531 "BOND_LINK_UP\n");
1532 new_slave->link = BOND_LINK_UP;
1533 }
1534 new_slave->jiffies = jiffies;
1535 } else {
1536 dprintk("Initial state of slave_dev is "
1537 "BOND_LINK_DOWN\n");
1538 new_slave->link = BOND_LINK_DOWN;
1539 }
1540
1541 if (bond_update_speed_duplex(new_slave) &&
1542 (new_slave->link != BOND_LINK_DOWN)) {
1543 printk(KERN_WARNING DRV_NAME
4e0952c7 1544 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1545 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1546 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1547
1548 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1549 printk(KERN_WARNING DRV_NAME
1550 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1551 "support in base driver for proper aggregator "
4e0952c7 1552 "selection.\n", bond_dev->name);
1da177e4
LT		 1553 }
1554 }
1555
1556 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1557 /* if there is a primary slave, remember it */
1558 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1559 bond->primary_slave = new_slave;
1560 }
1561 }
1562
1563 switch (bond->params.mode) {
1564 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1565 bond_set_slave_inactive_flags(new_slave);
1566 bond_select_active_slave(bond);
1da177e4
LT		 1567 break;
1568 case BOND_MODE_8023AD:
1569 /* in 802.3ad mode, the internal mechanism
1570 * will activate the slaves in the selected
1571 * aggregator
1572 */
1573 bond_set_slave_inactive_flags(new_slave);
1574 /* if this is the first slave */
1575 if (bond->slave_cnt == 1) {
1576 SLAVE_AD_INFO(new_slave).id = 1;
1577 /* Initialize AD with the number of times that the AD timer is called in 1 second
1578 * can be called only after the mac address of the bond is set
1579 */
1580 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1581 bond->params.lacp_fast);
1582 } else {
1583 SLAVE_AD_INFO(new_slave).id =
1584 SLAVE_AD_INFO(new_slave->prev).id + 1;
1585 }
1586
1587 bond_3ad_bind_slave(new_slave);
1588 break;
1589 case BOND_MODE_TLB:
1590 case BOND_MODE_ALB:
1591 new_slave->state = BOND_STATE_ACTIVE;
1592 if ((!bond->curr_active_slave) &&
1593 (new_slave->link != BOND_LINK_DOWN)) {
1594 /* first slave or no active slave yet, and this link
1595 * is OK, so make this interface the active one
1596 */
1597 bond_change_active_slave(bond, new_slave);
8f903c70
JV		 1598 } else {
1599 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1600 }
1601 break;
1602 default:
1603 dprintk("This slave is always active in trunk mode\n");
1604
1605 /* always active in trunk mode */
1606 new_slave->state = BOND_STATE_ACTIVE;
1607
1608 /* In trunking mode there is little meaning to curr_active_slave
1609 * anyway (it holds no special properties of the bond device),
1610 * so we can change it without calling change_active_interface()
1611 */
1612 if (!bond->curr_active_slave) {
1613 bond->curr_active_slave = new_slave;
1614 }
1615 break;
1616 } /* switch(bond_mode) */
1617
ff59c456
JV		 1618 bond_set_carrier(bond);
1619
1da177e4
LT		 1620 write_unlock_bh(&bond->lock);
1621
b76cdba9
MW		 1622 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1623 if (res)
1624 goto err_unset_master;
1625
1da177e4
LT		 1626 printk(KERN_INFO DRV_NAME
1627 ": %s: enslaving %s as a%s interface with a%s link.\n",
1628 bond_dev->name, slave_dev->name,
1629 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1630 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1631
1632 /* enslave is successful */
1633 return 0;
1634
1635/* Undo stages on error */
1636err_unset_master:
1637 netdev_set_master(slave_dev, NULL);
1638
1639err_close:
1640 dev_close(slave_dev);
1641
1642err_restore_mac:
dd957c57 1643 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1644 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1645 addr.sa_family = slave_dev->type;
1646 dev_set_mac_address(slave_dev, &addr);
1647 }
1da177e4
LT		 1648
1649err_free:
1650 kfree(new_slave);
1651
1652err_undo_flags:
1653 bond_dev->features = old_features;
8531c5ff 1654
1da177e4
LT		 1655 return res;
1656}
1657
1658/*
1659 * Try to release the slave device <slave> from the bond device <master>
1660 * It is legal to access curr_active_slave without a lock because all the function
1661 * is write-locked.
1662 *
1663 * The rules for slave state should be:
1664 * for Active/Backup:
1665 * Active stays on all backups go down
1666 * for Bonded connections:
1667 * The first up interface should be left on and all others downed.
1668 */
a77b5325 1669int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1670{
1671 struct bonding *bond = bond_dev->priv;
1672 struct slave *slave, *oldcurrent;
1673 struct sockaddr addr;
1674 int mac_addr_differ;
0795af57 1675 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1676
1677 /* slave is not a slave or master is not master of this slave */
1678 if (!(slave_dev->flags & IFF_SLAVE) ||
1679 (slave_dev->master != bond_dev)) {
1680 printk(KERN_ERR DRV_NAME
4e0952c7 1681 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1682 bond_dev->name, slave_dev->name);
1683 return -EINVAL;
1684 }
1685
1686 write_lock_bh(&bond->lock);
1687
1688 slave = bond_get_slave_by_dev(bond, slave_dev);
1689 if (!slave) {
1690 /* not a slave of this bond */
1691 printk(KERN_INFO DRV_NAME
1692 ": %s: %s not enslaved\n",
1693 bond_dev->name, slave_dev->name);
f5e2a7b2 1694 write_unlock_bh(&bond->lock);
1da177e4
LT		 1695 return -EINVAL;
1696 }
1697
1698 mac_addr_differ = memcmp(bond_dev->dev_addr,
1699 slave->perm_hwaddr,
1700 ETH_ALEN);
1701 if (!mac_addr_differ && (bond->slave_cnt > 1)) {
1702 printk(KERN_WARNING DRV_NAME
0795af57
JP		 1703 ": %s: Warning: the permanent HWaddr of %s - "
1704 "%s - is still in use by %s. "
1705 "Set the HWaddr of %s to a different address "
1706 "to avoid conflicts.\n",
4e0952c7 1707 bond_dev->name,
1da177e4 1708 slave_dev->name,
0795af57 1709 print_mac(mac, slave->perm_hwaddr),
1da177e4
LT		 1710 bond_dev->name,
1711 slave_dev->name);
1712 }
1713
1714 /* Inform AD package of unbinding of slave. */
1715 if (bond->params.mode == BOND_MODE_8023AD) {
1716 /* must be called before the slave is
1717 * detached from the list
1718 */
1719 bond_3ad_unbind_slave(slave);
1720 }
1721
1722 printk(KERN_INFO DRV_NAME
1723 ": %s: releasing %s interface %s\n",
1724 bond_dev->name,
1725 (slave->state == BOND_STATE_ACTIVE)
1726 ? "active" : "backup",
1727 slave_dev->name);
1728
1729 oldcurrent = bond->curr_active_slave;
1730
1731 bond->current_arp_slave = NULL;
1732
1733 /* release the slave from its bond */
1734 bond_detach_slave(bond, slave);
1735
8531c5ff
AK		 1736 bond_compute_features(bond);
1737
1da177e4
LT		 1738 if (bond->primary_slave == slave) {
1739 bond->primary_slave = NULL;
1740 }
1741
1742 if (oldcurrent == slave) {
1743 bond_change_active_slave(bond, NULL);
1744 }
1745
1746 if ((bond->params.mode == BOND_MODE_TLB) ||
1747 (bond->params.mode == BOND_MODE_ALB)) {
1748 /* Must be called only after the slave has been
1749 * detached from the list and the curr_active_slave
1750 * has been cleared (if our_slave == old_current),
1751 * but before a new active slave is selected.
1752 */
1753 bond_alb_deinit_slave(bond, slave);
1754 }
1755
ff59c456 1756 if (oldcurrent == slave)
1da177e4
LT		 1757 bond_select_active_slave(bond);
1758
1da177e4 1759 if (bond->slave_cnt == 0) {
ff59c456
JV		 1760 bond_set_carrier(bond);
1761
1da177e4
LT		 1762 /* if the last slave was removed, zero the mac address
1763 * of the master so it will be set by the application
1764 * to the mac address of the first slave
1765 */
1766 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1767
1768 if (list_empty(&bond->vlan_list)) {
1769 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1770 } else {
1771 printk(KERN_WARNING DRV_NAME
4e0952c7 1772 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1773 "still has VLANs.\n",
4e0952c7 1774 bond_dev->name, bond_dev->name);
1da177e4 1775 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1776 ": %s: When re-adding slaves, make sure the bond's "
1777 "HW address matches its VLANs'.\n",
1778 bond_dev->name);
1da177e4
LT		 1779 }
1780 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1781 !bond_has_challenged_slaves(bond)) {
1782 printk(KERN_INFO DRV_NAME
4e0952c7 1783 ": %s: last VLAN challenged slave %s "
1da177e4 1784 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1785 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1786 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1787 }
1788
1789 write_unlock_bh(&bond->lock);
1790
b76cdba9
MW		 1791 /* must do this from outside any spinlocks */
1792 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1793
1da177e4
LT		 1794 bond_del_vlans_from_slave(bond, slave_dev);
1795
1796 /* If the mode USES_PRIMARY, then we should only remove its
1797 * promisc and mc settings if it was the curr_active_slave, but that was
1798 * already taken care of above when we detached the slave
1799 */
1800 if (!USES_PRIMARY(bond->params.mode)) {
1801 /* unset promiscuity level from slave */
1802 if (bond_dev->flags & IFF_PROMISC) {
1803 dev_set_promiscuity(slave_dev, -1);
1804 }
1805
1806 /* unset allmulti level from slave */
1807 if (bond_dev->flags & IFF_ALLMULTI) {
1808 dev_set_allmulti(slave_dev, -1);
1809 }
1810
1811 /* flush master's mc_list from slave */
1812 bond_mc_list_flush(bond_dev, slave_dev);
1813 }
1814
1815 netdev_set_master(slave_dev, NULL);
1816
1817 /* close slave before restoring its mac address */
1818 dev_close(slave_dev);
1819
dd957c57 1820 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1821 /* restore original ("permanent") mac address */
1822 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1823 addr.sa_family = slave_dev->type;
1824 dev_set_mac_address(slave_dev, &addr);
1825 }
1da177e4 1826
8f903c70 1827 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1828 IFF_SLAVE_INACTIVE | IFF_BONDING |
1829 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1830
1831 kfree(slave);
1832
1833 return 0; /* deletion OK */
1834}
1835
d90a162a
MS		 1836/*
1837* Destroy a bonding device.
1838* Must be under rtnl_lock when this function is called.
1839*/
1840void bond_destroy(struct bonding *bond)
1841{
1842 bond_deinit(bond->dev);
1843 bond_destroy_sysfs_entry(bond);
1844 unregister_netdevice(bond->dev);
1845}
1846
1847/*
1848* First release a slave and than destroy the bond if no more slaves iare left.
1849* Must be under rtnl_lock when this function is called.
1850*/
1851int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1852{
1853 struct bonding *bond = bond_dev->priv;
1854 int ret;
1855
1856 ret = bond_release(bond_dev, slave_dev);
1857 if ((ret == 0) && (bond->slave_cnt == 0)) {
1858 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1859 bond_dev->name, bond_dev->name);
1860 bond_destroy(bond);
1861 }
1862 return ret;
1863}
1864
1da177e4
LT		 1865/*
1866 * This function releases all slaves.
1867 */
1868static int bond_release_all(struct net_device *bond_dev)
1869{
1870 struct bonding *bond = bond_dev->priv;
1871 struct slave *slave;
1872 struct net_device *slave_dev;
1873 struct sockaddr addr;
1874
1875 write_lock_bh(&bond->lock);
1876
ff59c456
JV		 1877 netif_carrier_off(bond_dev);
1878
1da177e4
LT		 1879 if (bond->slave_cnt == 0) {
1880 goto out;
1881 }
1882
1883 bond->current_arp_slave = NULL;
1884 bond->primary_slave = NULL;
1885 bond_change_active_slave(bond, NULL);
1886
1887 while ((slave = bond->first_slave) != NULL) {
1888 /* Inform AD package of unbinding of slave
1889 * before slave is detached from the list.
1890 */
1891 if (bond->params.mode == BOND_MODE_8023AD) {
1892 bond_3ad_unbind_slave(slave);
1893 }
1894
1895 slave_dev = slave->dev;
1896 bond_detach_slave(bond, slave);
1897
1898 if ((bond->params.mode == BOND_MODE_TLB) ||
1899 (bond->params.mode == BOND_MODE_ALB)) {
1900 /* must be called only after the slave
1901 * has been detached from the list
1902 */
1903 bond_alb_deinit_slave(bond, slave);
1904 }
1905
8531c5ff
AK		 1906 bond_compute_features(bond);
1907
1da177e4
LT		 1908 /* now that the slave is detached, unlock and perform
1909 * all the undo steps that should not be called from
1910 * within a lock.
1911 */
1912 write_unlock_bh(&bond->lock);
1913
b76cdba9 1914 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 1915 bond_del_vlans_from_slave(bond, slave_dev);
1916
1917 /* If the mode USES_PRIMARY, then we should only remove its
1918 * promisc and mc settings if it was the curr_active_slave, but that was
1919 * already taken care of above when we detached the slave
1920 */
1921 if (!USES_PRIMARY(bond->params.mode)) {
1922 /* unset promiscuity level from slave */
1923 if (bond_dev->flags & IFF_PROMISC) {
1924 dev_set_promiscuity(slave_dev, -1);
1925 }
1926
1927 /* unset allmulti level from slave */
1928 if (bond_dev->flags & IFF_ALLMULTI) {
1929 dev_set_allmulti(slave_dev, -1);
1930 }
1931
1932 /* flush master's mc_list from slave */
1933 bond_mc_list_flush(bond_dev, slave_dev);
1934 }
1935
1936 netdev_set_master(slave_dev, NULL);
1937
1938 /* close slave before restoring its mac address */
1939 dev_close(slave_dev);
1940
dd957c57 1941 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1942 /* restore original ("permanent") mac address*/
1943 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1944 addr.sa_family = slave_dev->type;
1945 dev_set_mac_address(slave_dev, &addr);
1946 }
1da177e4 1947
8f903c70
JV		 1948 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1949 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1950
1951 kfree(slave);
1952
1953 /* re-acquire the lock before getting the next slave */
1954 write_lock_bh(&bond->lock);
1955 }
1956
1957 /* zero the mac address of the master so it will be
1958 * set by the application to the mac address of the
1959 * first slave
1960 */
1961 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1962
1963 if (list_empty(&bond->vlan_list)) {
1964 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1965 } else {
1966 printk(KERN_WARNING DRV_NAME
4e0952c7 1967 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1968 "still has VLANs.\n",
4e0952c7 1969 bond_dev->name, bond_dev->name);
1da177e4 1970 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1971 ": %s: When re-adding slaves, make sure the bond's "
1972 "HW address matches its VLANs'.\n",
1973 bond_dev->name);
1da177e4
LT		 1974 }
1975
1976 printk(KERN_INFO DRV_NAME
1977 ": %s: released all slaves\n",
1978 bond_dev->name);
1979
1980out:
1981 write_unlock_bh(&bond->lock);
1982
1983 return 0;
1984}
1985
1986/*
1987 * This function changes the active slave to slave <slave_dev>.
1988 * It returns -EINVAL in the following cases.
1989 * - <slave_dev> is not found in the list.
1990 * - There is not active slave now.
1991 * - <slave_dev> is already active.
1992 * - The link state of <slave_dev> is not BOND_LINK_UP.
1993 * - <slave_dev> is not running.
1994 * In these cases, this fuction does nothing.
1995 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1996 */
1997static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
1998{
1999 struct bonding *bond = bond_dev->priv;
2000 struct slave *old_active = NULL;
2001 struct slave *new_active = NULL;
2002 int res = 0;
2003
2004 if (!USES_PRIMARY(bond->params.mode)) {
2005 return -EINVAL;
2006 }
2007
2008 /* Verify that master_dev is indeed the master of slave_dev */
2009 if (!(slave_dev->flags & IFF_SLAVE) ||
2010 (slave_dev->master != bond_dev)) {
2011 return -EINVAL;
2012 }
2013
2014 write_lock_bh(&bond->lock);
2015
2016 old_active = bond->curr_active_slave;
2017 new_active = bond_get_slave_by_dev(bond, slave_dev);
2018
2019 /*
2020 * Changing to the current active: do nothing; return success.
2021 */
2022 if (new_active && (new_active == old_active)) {
2023 write_unlock_bh(&bond->lock);
2024 return 0;
2025 }
2026
2027 if ((new_active) &&
2028 (old_active) &&
2029 (new_active->link == BOND_LINK_UP) &&
2030 IS_UP(new_active->dev)) {
2031 bond_change_active_slave(bond, new_active);
2032 } else {
2033 res = -EINVAL;
2034 }
2035
2036 write_unlock_bh(&bond->lock);
2037
2038 return res;
2039}
2040
1da177e4
LT		 2041static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2042{
2043 struct bonding *bond = bond_dev->priv;
2044
2045 info->bond_mode = bond->params.mode;
2046 info->miimon = bond->params.miimon;
2047
2048 read_lock_bh(&bond->lock);
2049 info->num_slaves = bond->slave_cnt;
2050 read_unlock_bh(&bond->lock);
2051
2052 return 0;
2053}
2054
2055static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2056{
2057 struct bonding *bond = bond_dev->priv;
2058 struct slave *slave;
2059 int i, found = 0;
2060
2061 if (info->slave_id < 0) {
2062 return -ENODEV;
2063 }
2064
2065 read_lock_bh(&bond->lock);
2066
2067 bond_for_each_slave(bond, slave, i) {
2068 if (i == (int)info->slave_id) {
2069 found = 1;
2070 break;
2071 }
2072 }
2073
2074 read_unlock_bh(&bond->lock);
2075
2076 if (found) {
2077 strcpy(info->slave_name, slave->dev->name);
2078 info->link = slave->link;
2079 info->state = slave->state;
2080 info->link_failure_count = slave->link_failure_count;
2081 } else {
2082 return -ENODEV;
2083 }
2084
2085 return 0;
2086}
2087
2088/*-------------------------------- Monitoring -------------------------------*/
2089
2090/* this function is called regularly to monitor each slave's link. */
a77b5325 2091void bond_mii_monitor(struct net_device *bond_dev)
1da177e4
LT		 2092{
2093 struct bonding *bond = bond_dev->priv;
2094 struct slave *slave, *oldcurrent;
2095 int do_failover = 0;
2096 int delta_in_ticks;
2097 int i;
2098
2099 read_lock(&bond->lock);
2100
2101 delta_in_ticks = (bond->params.miimon * HZ) / 1000;
2102
2103 if (bond->kill_timers) {
2104 goto out;
2105 }
2106
2107 if (bond->slave_cnt == 0) {
2108 goto re_arm;
2109 }
2110
2111 /* we will try to read the link status of each of our slaves, and
2112 * set their IFF_RUNNING flag appropriately. For each slave not
2113 * supporting MII status, we won't do anything so that a user-space
2114 * program could monitor the link itself if needed.
2115 */
2116
1053f62c
MS		 2117 if (bond->send_grat_arp) {
2118 if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
2119 &bond->curr_active_slave->dev->state))
2120 dprintk("Needs to send gratuitous arp but not yet\n");
2121 else {
2122 dprintk("sending delayed gratuitous arp on on %s\n",
2123 bond->curr_active_slave->dev->name);
2124 bond_send_gratuitous_arp(bond);
2125 bond->send_grat_arp = 0;
2126 }
2127 }
1da177e4
LT		 2128 read_lock(&bond->curr_slave_lock);
2129 oldcurrent = bond->curr_active_slave;
2130 read_unlock(&bond->curr_slave_lock);
2131
2132 bond_for_each_slave(bond, slave, i) {
2133 struct net_device *slave_dev = slave->dev;
2134 int link_state;
2135 u16 old_speed = slave->speed;
2136 u8 old_duplex = slave->duplex;
2137
2138 link_state = bond_check_dev_link(bond, slave_dev, 0);
2139
2140 switch (slave->link) {
2141 case BOND_LINK_UP: /* the link was up */
2142 if (link_state == BMSR_LSTATUS) {
2143 /* link stays up, nothing more to do */
2144 break;
2145 } else { /* link going down */
2146 slave->link = BOND_LINK_FAIL;
2147 slave->delay = bond->params.downdelay;
2148
2149 if (slave->link_failure_count < UINT_MAX) {
2150 slave->link_failure_count++;
2151 }
2152
2153 if (bond->params.downdelay) {
2154 printk(KERN_INFO DRV_NAME
2155 ": %s: link status down for %s "
2156 "interface %s, disabling it in "
2157 "%d ms.\n",
2158 bond_dev->name,
2159 IS_UP(slave_dev)
2160 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2161 ? ((slave == oldcurrent)
2162 ? "active " : "backup ")
2163 : "")
2164 : "idle ",
2165 slave_dev->name,
2166 bond->params.downdelay * bond->params.miimon);
2167 }
2168 }
2169 /* no break ! fall through the BOND_LINK_FAIL test to
2170 ensure proper action to be taken
2171 */
2172 case BOND_LINK_FAIL: /* the link has just gone down */
2173 if (link_state != BMSR_LSTATUS) {
2174 /* link stays down */
2175 if (slave->delay <= 0) {
2176 /* link down for too long time */
2177 slave->link = BOND_LINK_DOWN;
2178
2179 /* in active/backup mode, we must
2180 * completely disable this interface
2181 */
2182 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2183 (bond->params.mode == BOND_MODE_8023AD)) {
2184 bond_set_slave_inactive_flags(slave);
2185 }
2186
2187 printk(KERN_INFO DRV_NAME
2188 ": %s: link status definitely "
2189 "down for interface %s, "
2190 "disabling it\n",
2191 bond_dev->name,
2192 slave_dev->name);
2193
2194 /* notify ad that the link status has changed */
2195 if (bond->params.mode == BOND_MODE_8023AD) {
2196 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2197 }
2198
2199 if ((bond->params.mode == BOND_MODE_TLB) ||
2200 (bond->params.mode == BOND_MODE_ALB)) {
2201 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2202 }
2203
2204 if (slave == oldcurrent) {
2205 do_failover = 1;
2206 }
2207 } else {
2208 slave->delay--;
2209 }
2210 } else {
2211 /* link up again */
2212 slave->link = BOND_LINK_UP;
2213 slave->jiffies = jiffies;
2214 printk(KERN_INFO DRV_NAME
2215 ": %s: link status up again after %d "
2216 "ms for interface %s.\n",
2217 bond_dev->name,
2218 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2219 slave_dev->name);
2220 }
2221 break;
2222 case BOND_LINK_DOWN: /* the link was down */
2223 if (link_state != BMSR_LSTATUS) {
2224 /* the link stays down, nothing more to do */
2225 break;
2226 } else { /* link going up */
2227 slave->link = BOND_LINK_BACK;
2228 slave->delay = bond->params.updelay;
2229
2230 if (bond->params.updelay) {
2231 /* if updelay == 0, no need to
2232 advertise about a 0 ms delay */
2233 printk(KERN_INFO DRV_NAME
2234 ": %s: link status up for "
2235 "interface %s, enabling it "
2236 "in %d ms.\n",
2237 bond_dev->name,
2238 slave_dev->name,
2239 bond->params.updelay * bond->params.miimon);
2240 }
2241 }
2242 /* no break ! fall through the BOND_LINK_BACK state in
2243 case there's something to do.
2244 */
2245 case BOND_LINK_BACK: /* the link has just come back */
2246 if (link_state != BMSR_LSTATUS) {
2247 /* link down again */
2248 slave->link = BOND_LINK_DOWN;
2249
2250 printk(KERN_INFO DRV_NAME
2251 ": %s: link status down again after %d "
2252 "ms for interface %s.\n",
2253 bond_dev->name,
2254 (bond->params.updelay - slave->delay) * bond->params.miimon,
2255 slave_dev->name);
2256 } else {
2257 /* link stays up */
2258 if (slave->delay == 0) {
2259 /* now the link has been up for long time enough */
2260 slave->link = BOND_LINK_UP;
2261 slave->jiffies = jiffies;
2262
2263 if (bond->params.mode == BOND_MODE_8023AD) {
2264 /* prevent it from being the active one */
2265 slave->state = BOND_STATE_BACKUP;
2266 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2267 /* make it immediately active */
2268 slave->state = BOND_STATE_ACTIVE;
2269 } else if (slave != bond->primary_slave) {
2270 /* prevent it from being the active one */
2271 slave->state = BOND_STATE_BACKUP;
2272 }
2273
2274 printk(KERN_INFO DRV_NAME
2275 ": %s: link status definitely "
2276 "up for interface %s.\n",
2277 bond_dev->name,
2278 slave_dev->name);
2279
2280 /* notify ad that the link status has changed */
2281 if (bond->params.mode == BOND_MODE_8023AD) {
2282 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2283 }
2284
2285 if ((bond->params.mode == BOND_MODE_TLB) ||
2286 (bond->params.mode == BOND_MODE_ALB)) {
2287 bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
2288 }
2289
2290 if ((!oldcurrent) ||
2291 (slave == bond->primary_slave)) {
2292 do_failover = 1;
2293 }
2294 } else {
2295 slave->delay--;
2296 }
2297 }
2298 break;
2299 default:
2300 /* Should not happen */
4e0952c7
MW		 2301 printk(KERN_ERR DRV_NAME
2302 ": %s: Error: %s Illegal value (link=%d)\n",
2303 bond_dev->name,
2304 slave->dev->name,
2305 slave->link);
1da177e4
LT		 2306 goto out;
2307 } /* end of switch (slave->link) */
2308
2309 bond_update_speed_duplex(slave);
2310
2311 if (bond->params.mode == BOND_MODE_8023AD) {
2312 if (old_speed != slave->speed) {
2313 bond_3ad_adapter_speed_changed(slave);
2314 }
2315
2316 if (old_duplex != slave->duplex) {
2317 bond_3ad_adapter_duplex_changed(slave);
2318 }
2319 }
2320
2321 } /* end of for */
2322
2323 if (do_failover) {
2324 write_lock(&bond->curr_slave_lock);
2325
2326 bond_select_active_slave(bond);
2327
1da177e4 2328 write_unlock(&bond->curr_slave_lock);
ff59c456
JV		 2329 } else
2330 bond_set_carrier(bond);
1da177e4
LT		 2331
2332re_arm:
2333 if (bond->params.miimon) {
2334 mod_timer(&bond->mii_timer, jiffies + delta_in_ticks);
2335 }
2336out:
2337 read_unlock(&bond->lock);
2338}
2339
c3ade5ca 2340
d3bb52b0 2341static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2342{
2343 struct in_device *idev;
2344 struct in_ifaddr *ifa;
a144ea4b 2345 __be32 addr = 0;
c3ade5ca
JV		 2346
2347 if (!dev)
2348 return 0;
2349
2350 rcu_read_lock();
e5ed6399 2351 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2352 if (!idev)
2353 goto out;
2354
2355 ifa = idev->ifa_list;
2356 if (!ifa)
2357 goto out;
2358
2359 addr = ifa->ifa_local;
2360out:
2361 rcu_read_unlock();
2362 return addr;
2363}
2364
2365static int bond_has_ip(struct bonding *bond)
2366{
2367 struct vlan_entry *vlan, *vlan_next;
2368
2369 if (bond->master_ip)
2370 return 1;
2371
2372 if (list_empty(&bond->vlan_list))
2373 return 0;
2374
2375 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2376 vlan_list) {
2377 if (vlan->vlan_ip)
2378 return 1;
2379 }
2380
2381 return 0;
2382}
2383
d3bb52b0 2384static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966
JV		 2385{
2386 struct vlan_entry *vlan, *vlan_next;
2387
2388 if (ip == bond->master_ip)
2389 return 1;
2390
2391 if (list_empty(&bond->vlan_list))
2392 return 0;
2393
2394 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2395 vlan_list) {
2396 if (ip == vlan->vlan_ip)
2397 return 1;
2398 }
2399
2400 return 0;
2401}
2402
c3ade5ca
JV		 2403/*
2404 * We go to the (large) trouble of VLAN tagging ARP frames because
2405 * switches in VLAN mode (especially if ports are configured as
2406 * "native" to a VLAN) might not pass non-tagged frames.
2407 */
d3bb52b0 2408static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2409{
2410 struct sk_buff *skb;
2411
2412 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2413 slave_dev->name, dest_ip, src_ip, vlan_id);
2414
2415 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2416 NULL, slave_dev->dev_addr, NULL);
2417
2418 if (!skb) {
2419 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2420 return;
2421 }
2422 if (vlan_id) {
2423 skb = vlan_put_tag(skb, vlan_id);
2424 if (!skb) {
2425 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2426 return;
2427 }
2428 }
2429 arp_xmit(skb);
2430}
2431
2432
1da177e4
LT		 2433static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2434{
c3ade5ca 2435 int i, vlan_id, rv;
d3bb52b0 2436 __be32 *targets = bond->params.arp_targets;
c3ade5ca
JV		 2437 struct vlan_entry *vlan, *vlan_next;
2438 struct net_device *vlan_dev;
2439 struct flowi fl;
2440 struct rtable *rt;
1da177e4 2441
6b780567
MW		 2442 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2443 if (!targets[i])
2444 continue;
c3ade5ca
JV		 2445 dprintk("basa: target %x\n", targets[i]);
2446 if (list_empty(&bond->vlan_list)) {
2447 dprintk("basa: empty vlan: arp_send\n");
2448 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2449 bond->master_ip, 0);
2450 continue;
2451 }
2452
2453 /*
2454 * If VLANs are configured, we do a route lookup to
2455 * determine which VLAN interface would be used, so we
2456 * can tag the ARP with the proper VLAN tag.
2457 */
2458 memset(&fl, 0, sizeof(fl));
2459 fl.fl4_dst = targets[i];
2460 fl.fl4_tos = RTO_ONLINK;
2461
2462 rv = ip_route_output_key(&rt, &fl);
2463 if (rv) {
2464 if (net_ratelimit()) {
2465 printk(KERN_WARNING DRV_NAME
2466 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2467 bond->dev->name, NIPQUAD(fl.fl4_dst));
2468 }
2469 continue;
2470 }
2471
2472 /*
2473 * This target is not on a VLAN
2474 */
2475 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2476 ip_rt_put(rt);
c3ade5ca
JV		 2477 dprintk("basa: rtdev == bond->dev: arp_send\n");
2478 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2479 bond->master_ip, 0);
2480 continue;
2481 }
2482
2483 vlan_id = 0;
2484 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2485 vlan_list) {
5c15bdec 2486 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2487 if (vlan_dev == rt->u.dst.dev) {
2488 vlan_id = vlan->vlan_id;
2489 dprintk("basa: vlan match on %s %d\n",
2490 vlan_dev->name, vlan_id);
2491 break;
2492 }
2493 }
2494
2495 if (vlan_id) {
ed4b9f80 2496 ip_rt_put(rt);
c3ade5ca
JV		 2497 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2498 vlan->vlan_ip, vlan_id);
2499 continue;
2500 }
2501
2502 if (net_ratelimit()) {
2503 printk(KERN_WARNING DRV_NAME
2504 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2505 bond->dev->name, NIPQUAD(fl.fl4_dst),
2506 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2507 }
ed4b9f80 2508 ip_rt_put(rt);
c3ade5ca
JV		 2509 }
2510}
2511
2512/*
2513 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2514 * for each VLAN above us.
2515 */
2516static void bond_send_gratuitous_arp(struct bonding *bond)
2517{
2518 struct slave *slave = bond->curr_active_slave;
2519 struct vlan_entry *vlan;
2520 struct net_device *vlan_dev;
2521
2522 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2523 slave ? slave->dev->name : "NULL");
2524 if (!slave)
2525 return;
2526
2527 if (bond->master_ip) {
2528 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2529 bond->master_ip, 0);
c3ade5ca
JV		 2530 }
2531
2532 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2533 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2534 if (vlan->vlan_ip) {
2535 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2536 vlan->vlan_ip, vlan->vlan_id);
2537 }
1da177e4
LT		 2538 }
2539}
2540
d3bb52b0 2541static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2542{
2543 int i;
d3bb52b0 2544 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2545
2546 targets = bond->params.arp_targets;
2547 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2548 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2549 "%u.%u.%u.%u bhti(tip) %d\n",
2550 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2551 bond_has_this_ip(bond, tip));
2552 if (sip == targets[i]) {
2553 if (bond_has_this_ip(bond, tip))
2554 slave->last_arp_rx = jiffies;
2555 return;
2556 }
2557 }
2558}
2559
2560static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2561{
2562 struct arphdr *arp;
2563 struct slave *slave;
2564 struct bonding *bond;
2565 unsigned char *arp_ptr;
d3bb52b0 2566 __be32 sip, tip;
f5b2b966 2567
e730c155
EB		 2568 if (dev->nd_net != &init_net)
2569 goto out;
2570
f5b2b966
JV		 2571 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2572 goto out;
2573
2574 bond = dev->priv;
2575 read_lock(&bond->lock);
2576
2577 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2578 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2579 orig_dev ? orig_dev->name : "NULL");
2580
2581 slave = bond_get_slave_by_dev(bond, orig_dev);
2582 if (!slave || !slave_do_arp_validate(bond, slave))
2583 goto out_unlock;
2584
2585 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2586 if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
2587 (2 * dev->addr_len) +
2588 (2 * sizeof(u32)))))
2589 goto out_unlock;
2590
d0a92be0 2591 arp = arp_hdr(skb);
f5b2b966
JV		 2592 if (arp->ar_hln != dev->addr_len ||
2593 skb->pkt_type == PACKET_OTHERHOST ||
2594 skb->pkt_type == PACKET_LOOPBACK ||
2595 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2596 arp->ar_pro != htons(ETH_P_IP) ||
2597 arp->ar_pln != 4)
2598 goto out_unlock;
2599
2600 arp_ptr = (unsigned char *)(arp + 1);
2601 arp_ptr += dev->addr_len;
2602 memcpy(&sip, arp_ptr, 4);
2603 arp_ptr += 4 + dev->addr_len;
2604 memcpy(&tip, arp_ptr, 4);
2605
2606 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2607 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2608 slave->state, bond->params.arp_validate,
2609 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2610
2611 /*
2612 * Backup slaves won't see the ARP reply, but do come through
2613 * here for each ARP probe (so we swap the sip/tip to validate
2614 * the probe). In a "redundant switch, common router" type of
2615 * configuration, the ARP probe will (hopefully) travel from
2616 * the active, through one switch, the router, then the other
2617 * switch before reaching the backup.
2618 */
2619 if (slave->state == BOND_STATE_ACTIVE)
2620 bond_validate_arp(bond, slave, sip, tip);
2621 else
2622 bond_validate_arp(bond, slave, tip, sip);
2623
2624out_unlock:
2625 read_unlock(&bond->lock);
2626out:
2627 dev_kfree_skb(skb);
2628 return NET_RX_SUCCESS;
2629}
2630
1da177e4
LT		 2631/*
2632 * this function is called regularly to monitor each slave's link
2633 * ensuring that traffic is being sent and received when arp monitoring
2634 * is used in load-balancing mode. if the adapter has been dormant, then an
2635 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2636 * arp monitoring in active backup mode.
2637 */
a77b5325 2638void bond_loadbalance_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2639{
2640 struct bonding *bond = bond_dev->priv;
2641 struct slave *slave, *oldcurrent;
2642 int do_failover = 0;
2643 int delta_in_ticks;
2644 int i;
2645
2646 read_lock(&bond->lock);
2647
2648 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2649
2650 if (bond->kill_timers) {
2651 goto out;
2652 }
2653
2654 if (bond->slave_cnt == 0) {
2655 goto re_arm;
2656 }
2657
2658 read_lock(&bond->curr_slave_lock);
2659 oldcurrent = bond->curr_active_slave;
2660 read_unlock(&bond->curr_slave_lock);
2661
2662 /* see if any of the previous devices are up now (i.e. they have
2663 * xmt and rcv traffic). the curr_active_slave does not come into
2664 * the picture unless it is null. also, slave->jiffies is not needed
2665 * here because we send an arp on each slave and give a slave as
2666 * long as it needs to get the tx/rx within the delta.
2667 * TODO: what about up/down delay in arp mode? it wasn't here before
2668 * so it can wait
2669 */
2670 bond_for_each_slave(bond, slave, i) {
2671 if (slave->link != BOND_LINK_UP) {
2672 if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) &&
2673 ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) {
2674
2675 slave->link = BOND_LINK_UP;
2676 slave->state = BOND_STATE_ACTIVE;
2677
2678 /* primary_slave has no meaning in round-robin
2679 * mode. the window of a slave being up and
2680 * curr_active_slave being null after enslaving
2681 * is closed.
2682 */
2683 if (!oldcurrent) {
2684 printk(KERN_INFO DRV_NAME
2685 ": %s: link status definitely "
2686 "up for interface %s, ",
2687 bond_dev->name,
2688 slave->dev->name);
2689 do_failover = 1;
2690 } else {
2691 printk(KERN_INFO DRV_NAME
2692 ": %s: interface %s is now up\n",
2693 bond_dev->name,
2694 slave->dev->name);
2695 }
2696 }
2697 } else {
2698 /* slave->link == BOND_LINK_UP */
2699
2700 /* not all switches will respond to an arp request
2701 * when the source ip is 0, so don't take the link down
2702 * if we don't know our ip yet
2703 */
2704 if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
2705 (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
c3ade5ca 2706 bond_has_ip(bond))) {
1da177e4
LT		 2707
2708 slave->link = BOND_LINK_DOWN;
2709 slave->state = BOND_STATE_BACKUP;
2710
2711 if (slave->link_failure_count < UINT_MAX) {
2712 slave->link_failure_count++;
2713 }
2714
2715 printk(KERN_INFO DRV_NAME
2716 ": %s: interface %s is now down.\n",
2717 bond_dev->name,
2718 slave->dev->name);
2719
2720 if (slave == oldcurrent) {
2721 do_failover = 1;
2722 }
2723 }
2724 }
2725
2726 /* note: if switch is in round-robin mode, all links
2727 * must tx arp to ensure all links rx an arp - otherwise
2728 * links may oscillate or not come up at all; if switch is
2729 * in something like xor mode, there is nothing we can
2730 * do - all replies will be rx'ed on same link causing slaves
2731 * to be unstable during low/no traffic periods
2732 */
2733 if (IS_UP(slave->dev)) {
2734 bond_arp_send_all(bond, slave);
2735 }
2736 }
2737
2738 if (do_failover) {
2739 write_lock(&bond->curr_slave_lock);
2740
2741 bond_select_active_slave(bond);
2742
1da177e4
LT		 2743 write_unlock(&bond->curr_slave_lock);
2744 }
2745
2746re_arm:
2747 if (bond->params.arp_interval) {
2748 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2749 }
2750out:
2751 read_unlock(&bond->lock);
2752}
2753
2754/*
2755 * When using arp monitoring in active-backup mode, this function is
2756 * called to determine if any backup slaves have went down or a new
2757 * current slave needs to be found.
2758 * The backup slaves never generate traffic, they are considered up by merely
2759 * receiving traffic. If the current slave goes down, each backup slave will
2760 * be given the opportunity to tx/rx an arp before being taken down - this
2761 * prevents all slaves from being taken down due to the current slave not
2762 * sending any traffic for the backups to receive. The arps are not necessarily
2763 * necessary, any tx and rx traffic will keep the current slave up. While any
2764 * rx traffic will keep the backup slaves up, the current slave is responsible
2765 * for generating traffic to keep them up regardless of any other traffic they
2766 * may have received.
2767 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2768 */
a77b5325 2769void bond_activebackup_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2770{
2771 struct bonding *bond = bond_dev->priv;
2772 struct slave *slave;
2773 int delta_in_ticks;
2774 int i;
2775
2776 read_lock(&bond->lock);
2777
2778 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2779
2780 if (bond->kill_timers) {
2781 goto out;
2782 }
2783
2784 if (bond->slave_cnt == 0) {
2785 goto re_arm;
2786 }
2787
2788 /* determine if any slave has come up or any backup slave has
2789 * gone down
2790 * TODO: what about up/down delay in arp mode? it wasn't here before
2791 * so it can wait
2792 */
2793 bond_for_each_slave(bond, slave, i) {
2794 if (slave->link != BOND_LINK_UP) {
f5b2b966
JV		 2795 if ((jiffies - slave_last_rx(bond, slave)) <=
2796 delta_in_ticks) {
1da177e4
LT		 2797
2798 slave->link = BOND_LINK_UP;
2799
2800 write_lock(&bond->curr_slave_lock);
2801
2802 if ((!bond->curr_active_slave) &&
2803 ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) {
2804 bond_change_active_slave(bond, slave);
2805 bond->current_arp_slave = NULL;
2806 } else if (bond->curr_active_slave != slave) {
2807 /* this slave has just come up but we
2808 * already have a current slave; this
2809 * can also happen if bond_enslave adds
2810 * a new slave that is up while we are
2811 * searching for a new slave
2812 */
2813 bond_set_slave_inactive_flags(slave);
2814 bond->current_arp_slave = NULL;
2815 }
2816
ff59c456
JV		 2817 bond_set_carrier(bond);
2818
1da177e4
LT		 2819 if (slave == bond->curr_active_slave) {
2820 printk(KERN_INFO DRV_NAME
2821 ": %s: %s is up and now the "
2822 "active interface\n",
2823 bond_dev->name,
2824 slave->dev->name);
ff59c456 2825 netif_carrier_on(bond->dev);
1da177e4
LT		 2826 } else {
2827 printk(KERN_INFO DRV_NAME
2828 ": %s: backup interface %s is "
2829 "now up\n",
2830 bond_dev->name,
2831 slave->dev->name);
2832 }
2833
2834 write_unlock(&bond->curr_slave_lock);
2835 }
2836 } else {
2837 read_lock(&bond->curr_slave_lock);
2838
2839 if ((slave != bond->curr_active_slave) &&
2840 (!bond->current_arp_slave) &&
f5b2b966 2841 (((jiffies - slave_last_rx(bond, slave)) >= 3*delta_in_ticks) &&
c3ade5ca 2842 bond_has_ip(bond))) {
1da177e4
LT		 2843 /* a backup slave has gone down; three times
2844 * the delta allows the current slave to be
2845 * taken out before the backup slave.
2846 * note: a non-null current_arp_slave indicates
2847 * the curr_active_slave went down and we are
2848 * searching for a new one; under this
2849 * condition we only take the curr_active_slave
2850 * down - this gives each slave a chance to
2851 * tx/rx traffic before being taken out
2852 */
2853
2854 read_unlock(&bond->curr_slave_lock);
2855
2856 slave->link = BOND_LINK_DOWN;
2857
2858 if (slave->link_failure_count < UINT_MAX) {
2859 slave->link_failure_count++;
2860 }
2861
2862 bond_set_slave_inactive_flags(slave);
2863
2864 printk(KERN_INFO DRV_NAME
2865 ": %s: backup interface %s is now down\n",
2866 bond_dev->name,
2867 slave->dev->name);
2868 } else {
2869 read_unlock(&bond->curr_slave_lock);
2870 }
2871 }
2872 }
2873
2874 read_lock(&bond->curr_slave_lock);
2875 slave = bond->curr_active_slave;
2876 read_unlock(&bond->curr_slave_lock);
2877
2878 if (slave) {
2879 /* if we have sent traffic in the past 2*arp_intervals but
2880 * haven't xmit and rx traffic in that time interval, select
2881 * a different slave. slave->jiffies is only updated when
2882 * a slave first becomes the curr_active_slave - not necessarily
2883 * after every arp; this ensures the slave has a full 2*delta
2884 * before being taken out. if a primary is being used, check
2885 * if it is up and needs to take over as the curr_active_slave
2886 */
2887 if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
f5b2b966 2888 (((jiffies - slave_last_rx(bond, slave)) >= (2*delta_in_ticks)) &&
c3ade5ca 2889 bond_has_ip(bond))) &&
1da177e4
LT		 2890 ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) {
2891
2892 slave->link = BOND_LINK_DOWN;
2893
2894 if (slave->link_failure_count < UINT_MAX) {
2895 slave->link_failure_count++;
2896 }
2897
2898 printk(KERN_INFO DRV_NAME
2899 ": %s: link status down for active interface "
2900 "%s, disabling it\n",
2901 bond_dev->name,
2902 slave->dev->name);
2903
2904 write_lock(&bond->curr_slave_lock);
2905
2906 bond_select_active_slave(bond);
2907 slave = bond->curr_active_slave;
2908
2909 write_unlock(&bond->curr_slave_lock);
2910
2911 bond->current_arp_slave = slave;
2912
2913 if (slave) {
2914 slave->jiffies = jiffies;
2915 }
2916 } else if ((bond->primary_slave) &&
2917 (bond->primary_slave != slave) &&
2918 (bond->primary_slave->link == BOND_LINK_UP)) {
2919 /* at this point, slave is the curr_active_slave */
2920 printk(KERN_INFO DRV_NAME
2921 ": %s: changing from interface %s to primary "
2922 "interface %s\n",
2923 bond_dev->name,
2924 slave->dev->name,
2925 bond->primary_slave->dev->name);
2926
2927 /* primary is up so switch to it */
2928 write_lock(&bond->curr_slave_lock);
2929 bond_change_active_slave(bond, bond->primary_slave);
2930 write_unlock(&bond->curr_slave_lock);
2931
2932 slave = bond->primary_slave;
2933 slave->jiffies = jiffies;
2934 } else {
2935 bond->current_arp_slave = NULL;
2936 }
2937
2938 /* the current slave must tx an arp to ensure backup slaves
2939 * rx traffic
2940 */
c3ade5ca 2941 if (slave && bond_has_ip(bond)) {
1da177e4
LT		 2942 bond_arp_send_all(bond, slave);
2943 }
2944 }
2945
2946 /* if we don't have a curr_active_slave, search for the next available
2947 * backup slave from the current_arp_slave and make it the candidate
2948 * for becoming the curr_active_slave
2949 */
2950 if (!slave) {
2951 if (!bond->current_arp_slave) {
2952 bond->current_arp_slave = bond->first_slave;
2953 }
2954
2955 if (bond->current_arp_slave) {
2956 bond_set_slave_inactive_flags(bond->current_arp_slave);
2957
2958 /* search for next candidate */
2f872f04 2959 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
1da177e4
LT		 2960 if (IS_UP(slave->dev)) {
2961 slave->link = BOND_LINK_BACK;
2962 bond_set_slave_active_flags(slave);
2963 bond_arp_send_all(bond, slave);
2964 slave->jiffies = jiffies;
2965 bond->current_arp_slave = slave;
2966 break;
2967 }
2968
2969 /* if the link state is up at this point, we
2970 * mark it down - this can happen if we have
2971 * simultaneous link failures and
2972 * reselect_active_interface doesn't make this
2973 * one the current slave so it is still marked
2974 * up when it is actually down
2975 */
2976 if (slave->link == BOND_LINK_UP) {
2977 slave->link = BOND_LINK_DOWN;
2978 if (slave->link_failure_count < UINT_MAX) {
2979 slave->link_failure_count++;
2980 }
2981
2982 bond_set_slave_inactive_flags(slave);
2983
2984 printk(KERN_INFO DRV_NAME
2985 ": %s: backup interface %s is "
2986 "now down.\n",
2987 bond_dev->name,
2988 slave->dev->name);
2989 }
2990 }
2991 }
2992 }
2993
2994re_arm:
2995 if (bond->params.arp_interval) {
2996 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2997 }
2998out:
2999 read_unlock(&bond->lock);
3000}
3001
3002/*------------------------------ proc/seq_file-------------------------------*/
3003
3004#ifdef CONFIG_PROC_FS
3005
3006#define SEQ_START_TOKEN ((void *)1)
3007
3008static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3009{
3010 struct bonding *bond = seq->private;
3011 loff_t off = 0;
3012 struct slave *slave;
3013 int i;
3014
3015 /* make sure the bond won't be taken away */
3016 read_lock(&dev_base_lock);
3017 read_lock_bh(&bond->lock);
3018
3019 if (*pos == 0) {
3020 return SEQ_START_TOKEN;
3021 }
3022
3023 bond_for_each_slave(bond, slave, i) {
3024 if (++off == *pos) {
3025 return slave;
3026 }
3027 }
3028
3029 return NULL;
3030}
3031
3032static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3033{
3034 struct bonding *bond = seq->private;
3035 struct slave *slave = v;
3036
3037 ++*pos;
3038 if (v == SEQ_START_TOKEN) {
3039 return bond->first_slave;
3040 }
3041
3042 slave = slave->next;
3043
3044 return (slave == bond->first_slave) ? NULL : slave;
3045}
3046
3047static void bond_info_seq_stop(struct seq_file *seq, void *v)
3048{
3049 struct bonding *bond = seq->private;
3050
3051 read_unlock_bh(&bond->lock);
3052 read_unlock(&dev_base_lock);
3053}
3054
3055static void bond_info_show_master(struct seq_file *seq)
3056{
3057 struct bonding *bond = seq->private;
3058 struct slave *curr;
4756b02f
MW		 3059 int i;
3060 u32 target;
1da177e4
LT		 3061
3062 read_lock(&bond->curr_slave_lock);
3063 curr = bond->curr_active_slave;
3064 read_unlock(&bond->curr_slave_lock);
3065
dd957c57 3066 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3067 bond_mode_name(bond->params.mode));
3068
dd957c57
JV		 3069 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3070 bond->params.fail_over_mac)
3071 seq_printf(seq, " (fail_over_mac)");
3072
3073 seq_printf(seq, "\n");
3074
c61b75ad
MW		 3075 if (bond->params.mode == BOND_MODE_XOR ||
3076 bond->params.mode == BOND_MODE_8023AD) {
3077 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3078 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3079 bond->params.xmit_policy);
3080 }
3081
1da177e4
LT		 3082 if (USES_PRIMARY(bond->params.mode)) {
3083 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3084 (bond->primary_slave) ?
3085 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3086
3087 seq_printf(seq, "Currently Active Slave: %s\n",
3088 (curr) ? curr->dev->name : "None");
3089 }
3090
ff59c456
JV		 3091 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3092 "up" : "down");
1da177e4
LT		 3093 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3094 seq_printf(seq, "Up Delay (ms): %d\n",
3095 bond->params.updelay * bond->params.miimon);
3096 seq_printf(seq, "Down Delay (ms): %d\n",
3097 bond->params.downdelay * bond->params.miimon);
3098
4756b02f
MW		 3099
3100 /* ARP information */
3101 if(bond->params.arp_interval > 0) {
3102 int printed=0;
3103 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3104 bond->params.arp_interval);
3105
3106 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3107
3108 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3109 if (!bond->params.arp_targets[i])
3110 continue;
3111 if (printed)
3112 seq_printf(seq, ",");
3113 target = ntohl(bond->params.arp_targets[i]);
3114 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3115 printed = 1;
3116 }
3117 seq_printf(seq, "\n");
3118 }
3119
1da177e4
LT		 3120 if (bond->params.mode == BOND_MODE_8023AD) {
3121 struct ad_info ad_info;
0795af57 3122 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3123
3124 seq_puts(seq, "\n802.3ad info\n");
3125 seq_printf(seq, "LACP rate: %s\n",
3126 (bond->params.lacp_fast) ? "fast" : "slow");
3127
3128 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3129 seq_printf(seq, "bond %s has no active aggregator\n",
3130 bond->dev->name);
3131 } else {
3132 seq_printf(seq, "Active Aggregator Info:\n");
3133
3134 seq_printf(seq, "\tAggregator ID: %d\n",
3135 ad_info.aggregator_id);
3136 seq_printf(seq, "\tNumber of ports: %d\n",
3137 ad_info.ports);
3138 seq_printf(seq, "\tActor Key: %d\n",
3139 ad_info.actor_key);
3140 seq_printf(seq, "\tPartner Key: %d\n",
3141 ad_info.partner_key);
0795af57
JP		 3142 seq_printf(seq, "\tPartner Mac Address: %s\n",
3143 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3144 }
3145 }
3146}
3147
3148static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3149{
3150 struct bonding *bond = seq->private;
0795af57 3151 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3152
3153 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3154 seq_printf(seq, "MII Status: %s\n",
3155 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3156 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3157 slave->link_failure_count);
3158
217df670 3159 seq_printf(seq,
0795af57
JP		 3160 "Permanent HW addr: %s\n",
3161 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3162
3163 if (bond->params.mode == BOND_MODE_8023AD) {
3164 const struct aggregator *agg
3165 = SLAVE_AD_INFO(slave).port.aggregator;
3166
3167 if (agg) {
3168 seq_printf(seq, "Aggregator ID: %d\n",
3169 agg->aggregator_identifier);
3170 } else {
3171 seq_puts(seq, "Aggregator ID: N/A\n");
3172 }
3173 }
3174}
3175
3176static int bond_info_seq_show(struct seq_file *seq, void *v)
3177{
3178 if (v == SEQ_START_TOKEN) {
3179 seq_printf(seq, "%s\n", version);
3180 bond_info_show_master(seq);
3181 } else {
3182 bond_info_show_slave(seq, v);
3183 }
3184
3185 return 0;
3186}
3187
3188static struct seq_operations bond_info_seq_ops = {
3189 .start = bond_info_seq_start,
3190 .next = bond_info_seq_next,
3191 .stop = bond_info_seq_stop,
3192 .show = bond_info_seq_show,
3193};
3194
3195static int bond_info_open(struct inode *inode, struct file *file)
3196{
3197 struct seq_file *seq;
3198 struct proc_dir_entry *proc;
3199 int res;
3200
3201 res = seq_open(file, &bond_info_seq_ops);
3202 if (!res) {
3203 /* recover the pointer buried in proc_dir_entry data */
3204 seq = file->private_data;
3205 proc = PDE(inode);
3206 seq->private = proc->data;
3207 }
3208
3209 return res;
3210}
3211
d54b1fdb 3212static const struct file_operations bond_info_fops = {
1da177e4
LT		 3213 .owner = THIS_MODULE,
3214 .open = bond_info_open,
3215 .read = seq_read,
3216 .llseek = seq_lseek,
3217 .release = seq_release,
3218};
3219
3220static int bond_create_proc_entry(struct bonding *bond)
3221{
3222 struct net_device *bond_dev = bond->dev;
3223
3224 if (bond_proc_dir) {
3225 bond->proc_entry = create_proc_entry(bond_dev->name,
3226 S_IRUGO,
3227 bond_proc_dir);
3228 if (bond->proc_entry == NULL) {
3229 printk(KERN_WARNING DRV_NAME
3230 ": Warning: Cannot create /proc/net/%s/%s\n",
3231 DRV_NAME, bond_dev->name);
3232 } else {
3233 bond->proc_entry->data = bond;
3234 bond->proc_entry->proc_fops = &bond_info_fops;
3235 bond->proc_entry->owner = THIS_MODULE;
3236 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3237 }
3238 }
3239
3240 return 0;
3241}
3242
3243static void bond_remove_proc_entry(struct bonding *bond)
3244{
3245 if (bond_proc_dir && bond->proc_entry) {
3246 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3247 memset(bond->proc_file_name, 0, IFNAMSIZ);
3248 bond->proc_entry = NULL;
3249 }
3250}
3251
3252/* Create the bonding directory under /proc/net, if doesn't exist yet.
3253 * Caller must hold rtnl_lock.
3254 */
3255static void bond_create_proc_dir(void)
3256{
3257 int len = strlen(DRV_NAME);
3258
457c4cbc 3259 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3260 bond_proc_dir = bond_proc_dir->next) {
3261 if ((bond_proc_dir->namelen == len) &&
3262 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3263 break;
3264 }
3265 }
3266
3267 if (!bond_proc_dir) {
457c4cbc 3268 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3269 if (bond_proc_dir) {
3270 bond_proc_dir->owner = THIS_MODULE;
3271 } else {
3272 printk(KERN_WARNING DRV_NAME
3273 ": Warning: cannot create /proc/net/%s\n",
3274 DRV_NAME);
3275 }
3276 }
3277}
3278
3279/* Destroy the bonding directory under /proc/net, if empty.
3280 * Caller must hold rtnl_lock.
3281 */
3282static void bond_destroy_proc_dir(void)
3283{
3284 struct proc_dir_entry *de;
3285
3286 if (!bond_proc_dir) {
3287 return;
3288 }
3289
3290 /* verify that the /proc dir is empty */
3291 for (de = bond_proc_dir->subdir; de; de = de->next) {
3292 /* ignore . and .. */
3293 if (*(de->name) != '.') {
3294 break;
3295 }
3296 }
3297
3298 if (de) {
3299 if (bond_proc_dir->owner == THIS_MODULE) {
3300 bond_proc_dir->owner = NULL;
3301 }
3302 } else {
457c4cbc 3303 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3304 bond_proc_dir = NULL;
3305 }
3306}
3307#endif /* CONFIG_PROC_FS */
3308
3309/*-------------------------- netdev event handling --------------------------*/
3310
3311/*
3312 * Change device name
3313 */
3314static int bond_event_changename(struct bonding *bond)
3315{
3316#ifdef CONFIG_PROC_FS
3317 bond_remove_proc_entry(bond);
3318 bond_create_proc_entry(bond);
3319#endif
b76cdba9
MW		 3320 down_write(&(bonding_rwsem));
3321 bond_destroy_sysfs_entry(bond);
3322 bond_create_sysfs_entry(bond);
3323 up_write(&(bonding_rwsem));
1da177e4
LT		 3324 return NOTIFY_DONE;
3325}
3326
3327static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3328{
3329 struct bonding *event_bond = bond_dev->priv;
3330
3331 switch (event) {
3332 case NETDEV_CHANGENAME:
3333 return bond_event_changename(event_bond);
3334 case NETDEV_UNREGISTER:
3335 /*
3336 * TODO: remove a bond from the list?
3337 */
3338 break;
3339 default:
3340 break;
3341 }
3342
3343 return NOTIFY_DONE;
3344}
3345
3346static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3347{
3348 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3349 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3350
3351 switch (event) {
3352 case NETDEV_UNREGISTER:
3353 if (bond_dev) {
3354 bond_release(bond_dev, slave_dev);
3355 }
3356 break;
3357 case NETDEV_CHANGE:
3358 /*
3359 * TODO: is this what we get if somebody
3360 * sets up a hierarchical bond, then rmmod's
3361 * one of the slave bonding devices?
3362 */
3363 break;
3364 case NETDEV_DOWN:
3365 /*
3366 * ... Or is it this?
3367 */
3368 break;
d90a162a
MS		 3369 case NETDEV_GOING_DOWN:
3370 dprintk("slave %s is going down\n", slave_dev->name);
3371 if (bond->setup_by_slave)
3372 bond_release_and_destroy(bond_dev, slave_dev);
3373 break;
1da177e4
LT		 3374 case NETDEV_CHANGEMTU:
3375 /*
3376 * TODO: Should slaves be allowed to
3377 * independently alter their MTU? For
3378 * an active-backup bond, slaves need
3379 * not be the same type of device, so
3380 * MTUs may vary. For other modes,
3381 * slaves arguably should have the
3382 * same MTUs. To do this, we'd need to
3383 * take over the slave's change_mtu
3384 * function for the duration of their
3385 * servitude.
3386 */
3387 break;
3388 case NETDEV_CHANGENAME:
3389 /*
3390 * TODO: handle changing the primary's name
3391 */
3392 break;
8531c5ff
AK		 3393 case NETDEV_FEAT_CHANGE:
3394 bond_compute_features(bond);
3395 break;
1da177e4
LT		 3396 default:
3397 break;
3398 }
3399
3400 return NOTIFY_DONE;
3401}
3402
3403/*
3404 * bond_netdev_event: handle netdev notifier chain events.
3405 *
3406 * This function receives events for the netdev chain. The caller (an
e041c683 3407 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3408 * locks for us to safely manipulate the slave devices (RTNL lock,
3409 * dev_probe_lock).
3410 */
3411static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3412{
3413 struct net_device *event_dev = (struct net_device *)ptr;
3414
e9dc8653
EB		 3415 if (event_dev->nd_net != &init_net)
3416 return NOTIFY_DONE;
3417
1da177e4
LT		 3418 dprintk("event_dev: %s, event: %lx\n",
3419 (event_dev ? event_dev->name : "None"),
3420 event);
3421
0b680e75
JV		 3422 if (!(event_dev->priv_flags & IFF_BONDING))
3423 return NOTIFY_DONE;
3424
1da177e4
LT		 3425 if (event_dev->flags & IFF_MASTER) {
3426 dprintk("IFF_MASTER\n");
3427 return bond_master_netdev_event(event, event_dev);
3428 }
3429
3430 if (event_dev->flags & IFF_SLAVE) {
3431 dprintk("IFF_SLAVE\n");
3432 return bond_slave_netdev_event(event, event_dev);
3433 }
3434
3435 return NOTIFY_DONE;
3436}
3437
c3ade5ca
JV		 3438/*
3439 * bond_inetaddr_event: handle inetaddr notifier chain events.
3440 *
3441 * We keep track of device IPs primarily to use as source addresses in
3442 * ARP monitor probes (rather than spewing out broadcasts all the time).
3443 *
3444 * We track one IP for the main device (if it has one), plus one per VLAN.
3445 */
3446static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3447{
3448 struct in_ifaddr *ifa = ptr;
3449 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3450 struct bonding *bond, *bond_next;
3451 struct vlan_entry *vlan, *vlan_next;
3452
3453 list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
3454 if (bond->dev == event_dev) {
3455 switch (event) {
3456 case NETDEV_UP:
3457 bond->master_ip = ifa->ifa_local;
3458 return NOTIFY_OK;
3459 case NETDEV_DOWN:
3460 bond->master_ip = bond_glean_dev_ip(bond->dev);
3461 return NOTIFY_OK;
3462 default:
3463 return NOTIFY_DONE;
3464 }
3465 }
3466
3467 if (list_empty(&bond->vlan_list))
3468 continue;
3469
3470 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
3471 vlan_list) {
5c15bdec 3472 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3473 if (vlan_dev == event_dev) {
3474 switch (event) {
3475 case NETDEV_UP:
3476 vlan->vlan_ip = ifa->ifa_local;
3477 return NOTIFY_OK;
3478 case NETDEV_DOWN:
3479 vlan->vlan_ip =
3480 bond_glean_dev_ip(vlan_dev);
3481 return NOTIFY_OK;
3482 default:
3483 return NOTIFY_DONE;
3484 }
3485 }
3486 }
3487 }
3488 return NOTIFY_DONE;
3489}
3490
1da177e4
LT		 3491static struct notifier_block bond_netdev_notifier = {
3492 .notifier_call = bond_netdev_event,
3493};
3494
c3ade5ca
JV		 3495static struct notifier_block bond_inetaddr_notifier = {
3496 .notifier_call = bond_inetaddr_event,
3497};
3498
1da177e4
LT		 3499/*-------------------------- Packet type handling ---------------------------*/
3500
3501/* register to receive lacpdus on a bond */
3502static void bond_register_lacpdu(struct bonding *bond)
3503{
3504 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3505
3506 /* initialize packet type */
3507 pk_type->type = PKT_TYPE_LACPDU;
3508 pk_type->dev = bond->dev;
3509 pk_type->func = bond_3ad_lacpdu_recv;
3510
3511 dev_add_pack(pk_type);
3512}
3513
3514/* unregister to receive lacpdus on a bond */
3515static void bond_unregister_lacpdu(struct bonding *bond)
3516{
3517 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3518}
3519
f5b2b966
JV		 3520void bond_register_arp(struct bonding *bond)
3521{
3522 struct packet_type *pt = &bond->arp_mon_pt;
3523
c4f283b1
JV		 3524 if (pt->type)
3525 return;
3526
f5b2b966 3527 pt->type = htons(ETH_P_ARP);
e245cb71 3528 pt->dev = bond->dev;
f5b2b966
JV		 3529 pt->func = bond_arp_rcv;
3530 dev_add_pack(pt);
3531}
3532
3533void bond_unregister_arp(struct bonding *bond)
3534{
c4f283b1
JV		 3535 struct packet_type *pt = &bond->arp_mon_pt;
3536
3537 dev_remove_pack(pt);
3538 pt->type = 0;
f5b2b966
JV		 3539}
3540
169a3e66
JV		 3541/*---------------------------- Hashing Policies -----------------------------*/
3542
3543/*
59c51591 3544 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3545 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3546 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3547 */
3548static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3549 struct net_device *bond_dev, int count)
3550{
3551 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3552 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3553 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3554 int layer4_xor = 0;
3555
3556 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3557 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3558 (iph->protocol == IPPROTO_TCP ||
3559 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3560 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3561 }
3562 return (layer4_xor ^
3563 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3564
3565 }
3566
3567 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3568}
3569
3570/*
3571 * Hash for the output device based upon layer 2 data
3572 */
3573static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3574 struct net_device *bond_dev, int count)
3575{
3576 struct ethhdr *data = (struct ethhdr *)skb->data;
3577
3578 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3579}
3580
1da177e4
LT		 3581/*-------------------------- Device entry points ----------------------------*/
3582
3583static int bond_open(struct net_device *bond_dev)
3584{
3585 struct bonding *bond = bond_dev->priv;
3586 struct timer_list *mii_timer = &bond->mii_timer;
3587 struct timer_list *arp_timer = &bond->arp_timer;
3588
3589 bond->kill_timers = 0;
3590
3591 if ((bond->params.mode == BOND_MODE_TLB) ||
3592 (bond->params.mode == BOND_MODE_ALB)) {
3593 struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer);
3594
3595 /* bond_alb_initialize must be called before the timer
3596 * is started.
3597 */
3598 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3599 /* something went wrong - fail the open operation */
3600 return -1;
3601 }
3602
3603 init_timer(alb_timer);
3604 alb_timer->expires = jiffies + 1;
3605 alb_timer->data = (unsigned long)bond;
3606 alb_timer->function = (void *)&bond_alb_monitor;
3607 add_timer(alb_timer);
3608 }
3609
3610 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3611 init_timer(mii_timer);
3612 mii_timer->expires = jiffies + 1;
3613 mii_timer->data = (unsigned long)bond_dev;
3614 mii_timer->function = (void *)&bond_mii_monitor;
3615 add_timer(mii_timer);
3616 }
3617
3618 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3619 init_timer(arp_timer);
3620 arp_timer->expires = jiffies + 1;
3621 arp_timer->data = (unsigned long)bond_dev;
3622 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
3623 arp_timer->function = (void *)&bond_activebackup_arp_mon;
3624 } else {
3625 arp_timer->function = (void *)&bond_loadbalance_arp_mon;
3626 }
f5b2b966
JV		 3627 if (bond->params.arp_validate)
3628 bond_register_arp(bond);
3629
1da177e4
LT		 3630 add_timer(arp_timer);
3631 }
3632
3633 if (bond->params.mode == BOND_MODE_8023AD) {
3634 struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer);
3635 init_timer(ad_timer);
3636 ad_timer->expires = jiffies + 1;
3637 ad_timer->data = (unsigned long)bond;
3638 ad_timer->function = (void *)&bond_3ad_state_machine_handler;
3639 add_timer(ad_timer);
3640
3641 /* register to receive LACPDUs */
3642 bond_register_lacpdu(bond);
3643 }
3644
3645 return 0;
3646}
3647
3648static int bond_close(struct net_device *bond_dev)
3649{
3650 struct bonding *bond = bond_dev->priv;
3651
3652 if (bond->params.mode == BOND_MODE_8023AD) {
3653 /* Unregister the receive of LACPDUs */
3654 bond_unregister_lacpdu(bond);
3655 }
3656
f5b2b966
JV		 3657 if (bond->params.arp_validate)
3658 bond_unregister_arp(bond);
3659
1da177e4
LT		 3660 write_lock_bh(&bond->lock);
3661
1da177e4
LT		 3662
3663 /* signal timers not to re-arm */
3664 bond->kill_timers = 1;
3665
3666 write_unlock_bh(&bond->lock);
3667
3668 /* del_timer_sync must run without holding the bond->lock
3669 * because a running timer might be trying to hold it too
3670 */
3671
3672 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3673 del_timer_sync(&bond->mii_timer);
3674 }
3675
3676 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3677 del_timer_sync(&bond->arp_timer);
3678 }
3679
3680 switch (bond->params.mode) {
3681 case BOND_MODE_8023AD:
3682 del_timer_sync(&(BOND_AD_INFO(bond).ad_timer));
3683 break;
3684 case BOND_MODE_TLB:
3685 case BOND_MODE_ALB:
3686 del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer));
3687 break;
3688 default:
3689 break;
3690 }
3691
1da177e4
LT		 3692
3693 if ((bond->params.mode == BOND_MODE_TLB) ||
3694 (bond->params.mode == BOND_MODE_ALB)) {
3695 /* Must be called only after all
3696 * slaves have been released
3697 */
3698 bond_alb_deinitialize(bond);
3699 }
3700
3701 return 0;
3702}
3703
3704static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3705{
3706 struct bonding *bond = bond_dev->priv;
3707 struct net_device_stats *stats = &(bond->stats), *sstats;
3708 struct slave *slave;
3709 int i;
3710
3711 memset(stats, 0, sizeof(struct net_device_stats));
3712
3713 read_lock_bh(&bond->lock);
3714
3715 bond_for_each_slave(bond, slave, i) {
c45d286e 3716 sstats = slave->dev->get_stats(slave->dev);
5a1b5898
RR		 3717 stats->rx_packets += sstats->rx_packets;
3718 stats->rx_bytes += sstats->rx_bytes;
3719 stats->rx_errors += sstats->rx_errors;
3720 stats->rx_dropped += sstats->rx_dropped;
3721
3722 stats->tx_packets += sstats->tx_packets;
3723 stats->tx_bytes += sstats->tx_bytes;
3724 stats->tx_errors += sstats->tx_errors;
3725 stats->tx_dropped += sstats->tx_dropped;
3726
3727 stats->multicast += sstats->multicast;
3728 stats->collisions += sstats->collisions;
3729
3730 stats->rx_length_errors += sstats->rx_length_errors;
3731 stats->rx_over_errors += sstats->rx_over_errors;
3732 stats->rx_crc_errors += sstats->rx_crc_errors;
3733 stats->rx_frame_errors += sstats->rx_frame_errors;
3734 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3735 stats->rx_missed_errors += sstats->rx_missed_errors;
3736
3737 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3738 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3739 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3740 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3741 stats->tx_window_errors += sstats->tx_window_errors;
1da177e4
LT		 3742 }
3743
3744 read_unlock_bh(&bond->lock);
3745
3746 return stats;
3747}
3748
3749static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3750{
3751 struct net_device *slave_dev = NULL;
3752 struct ifbond k_binfo;
3753 struct ifbond __user *u_binfo = NULL;
3754 struct ifslave k_sinfo;
3755 struct ifslave __user *u_sinfo = NULL;
3756 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3757 int res = 0;
3758
3759 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3760 bond_dev->name, cmd);
3761
3762 switch (cmd) {
1da177e4
LT		 3763 case SIOCGMIIPHY:
3764 mii = if_mii(ifr);
3765 if (!mii) {
3766 return -EINVAL;
3767 }
3768 mii->phy_id = 0;
3769 /* Fall Through */
3770 case SIOCGMIIREG:
3771 /*
3772 * We do this again just in case we were called by SIOCGMIIREG
3773 * instead of SIOCGMIIPHY.
3774 */
3775 mii = if_mii(ifr);
3776 if (!mii) {
3777 return -EINVAL;
3778 }
3779
3780 if (mii->reg_num == 1) {
3781 struct bonding *bond = bond_dev->priv;
3782 mii->val_out = 0;
3783 read_lock_bh(&bond->lock);
3784 read_lock(&bond->curr_slave_lock);
4e140079 3785 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3786 mii->val_out = BMSR_LSTATUS;
3787 }
3788 read_unlock(&bond->curr_slave_lock);
3789 read_unlock_bh(&bond->lock);
3790 }
3791
3792 return 0;
3793 case BOND_INFO_QUERY_OLD:
3794 case SIOCBONDINFOQUERY:
3795 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3796
3797 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3798 return -EFAULT;
3799 }
3800
3801 res = bond_info_query(bond_dev, &k_binfo);
3802 if (res == 0) {
3803 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3804 return -EFAULT;
3805 }
3806 }
3807
3808 return res;
3809 case BOND_SLAVE_INFO_QUERY_OLD:
3810 case SIOCBONDSLAVEINFOQUERY:
3811 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3812
3813 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3814 return -EFAULT;
3815 }
3816
3817 res = bond_slave_info_query(bond_dev, &k_sinfo);
3818 if (res == 0) {
3819 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3820 return -EFAULT;
3821 }
3822 }
3823
3824 return res;
3825 default:
3826 /* Go on */
3827 break;
3828 }
3829
3830 if (!capable(CAP_NET_ADMIN)) {
3831 return -EPERM;
3832 }
3833
b76cdba9 3834 down_write(&(bonding_rwsem));
881d966b 3835 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3836
3837 dprintk("slave_dev=%p: \n", slave_dev);
3838
3839 if (!slave_dev) {
3840 res = -ENODEV;
3841 } else {
3842 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3843 switch (cmd) {
3844 case BOND_ENSLAVE_OLD:
3845 case SIOCBONDENSLAVE:
3846 res = bond_enslave(bond_dev, slave_dev);
3847 break;
3848 case BOND_RELEASE_OLD:
3849 case SIOCBONDRELEASE:
3850 res = bond_release(bond_dev, slave_dev);
3851 break;
3852 case BOND_SETHWADDR_OLD:
3853 case SIOCBONDSETHWADDR:
3854 res = bond_sethwaddr(bond_dev, slave_dev);
3855 break;
3856 case BOND_CHANGE_ACTIVE_OLD:
3857 case SIOCBONDCHANGEACTIVE:
3858 res = bond_ioctl_change_active(bond_dev, slave_dev);
3859 break;
3860 default:
3861 res = -EOPNOTSUPP;
3862 }
3863
3864 dev_put(slave_dev);
3865 }
3866
b76cdba9 3867 up_write(&(bonding_rwsem));
1da177e4
LT		 3868 return res;
3869}
3870
3871static void bond_set_multicast_list(struct net_device *bond_dev)
3872{
3873 struct bonding *bond = bond_dev->priv;
3874 struct dev_mc_list *dmi;
3875
3876 write_lock_bh(&bond->lock);
3877
3878 /*
3879 * Do promisc before checking multicast_mode
3880 */
3881 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
3882 bond_set_promiscuity(bond, 1);
3883 }
3884
3885 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
3886 bond_set_promiscuity(bond, -1);
3887 }
3888
3889 /* set allmulti flag to slaves */
3890 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
3891 bond_set_allmulti(bond, 1);
3892 }
3893
3894 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
3895 bond_set_allmulti(bond, -1);
3896 }
3897
3898 bond->flags = bond_dev->flags;
3899
3900 /* looking for addresses to add to slaves' mc list */
3901 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3902 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
3903 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3904 }
3905 }
3906
3907 /* looking for addresses to delete from slaves' list */
3908 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3909 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
3910 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3911 }
3912 }
3913
3914 /* save master's multicast list */
3915 bond_mc_list_destroy(bond);
3916 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
3917
3918 write_unlock_bh(&bond->lock);
3919}
3920
3921/*
3922 * Change the MTU of all of a master's slaves to match the master
3923 */
3924static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3925{
3926 struct bonding *bond = bond_dev->priv;
3927 struct slave *slave, *stop_at;
3928 int res = 0;
3929 int i;
3930
3931 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
3932 (bond_dev ? bond_dev->name : "None"), new_mtu);
3933
3934 /* Can't hold bond->lock with bh disabled here since
3935 * some base drivers panic. On the other hand we can't
3936 * hold bond->lock without bh disabled because we'll
3937 * deadlock. The only solution is to rely on the fact
3938 * that we're under rtnl_lock here, and the slaves
3939 * list won't change. This doesn't solve the problem
3940 * of setting the slave's MTU while it is
3941 * transmitting, but the assumption is that the base
3942 * driver can handle that.
3943 *
3944 * TODO: figure out a way to safely iterate the slaves
3945 * list, but without holding a lock around the actual
3946 * call to the base driver.
3947 */
3948
3949 bond_for_each_slave(bond, slave, i) {
3950 dprintk("s %p s->p %p c_m %p\n", slave,
3951 slave->prev, slave->dev->change_mtu);
e944ef79 3952
1da177e4
LT		 3953 res = dev_set_mtu(slave->dev, new_mtu);
3954
3955 if (res) {
3956 /* If we failed to set the slave's mtu to the new value
3957 * we must abort the operation even in ACTIVE_BACKUP
3958 * mode, because if we allow the backup slaves to have
3959 * different mtu values than the active slave we'll
3960 * need to change their mtu when doing a failover. That
3961 * means changing their mtu from timer context, which
3962 * is probably not a good idea.
3963 */
3964 dprintk("err %d %s\n", res, slave->dev->name);
3965 goto unwind;
3966 }
3967 }
3968
3969 bond_dev->mtu = new_mtu;
3970
3971 return 0;
3972
3973unwind:
3974 /* unwind from head to the slave that failed */
3975 stop_at = slave;
3976 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3977 int tmp_res;
3978
3979 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3980 if (tmp_res) {
3981 dprintk("unwind err %d dev %s\n", tmp_res,
3982 slave->dev->name);
3983 }
3984 }
3985
3986 return res;
3987}
3988
3989/*
3990 * Change HW address
3991 *
3992 * Note that many devices must be down to change the HW address, and
3993 * downing the master releases all slaves. We can make bonds full of
3994 * bonding devices to test this, however.
3995 */
3996static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3997{
3998 struct bonding *bond = bond_dev->priv;
3999 struct sockaddr *sa = addr, tmp_sa;
4000 struct slave *slave, *stop_at;
4001 int res = 0;
4002 int i;
4003
4004 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4005
dd957c57
JV		 4006 /*
4007 * If fail_over_mac is enabled, do nothing and return success.
4008 * Returning an error causes ifenslave to fail.
4009 */
4010 if (bond->params.fail_over_mac)
4011 return 0;
2ab82852 4012
1da177e4
LT		 4013 if (!is_valid_ether_addr(sa->sa_data)) {
4014 return -EADDRNOTAVAIL;
4015 }
4016
4017 /* Can't hold bond->lock with bh disabled here since
4018 * some base drivers panic. On the other hand we can't
4019 * hold bond->lock without bh disabled because we'll
4020 * deadlock. The only solution is to rely on the fact
4021 * that we're under rtnl_lock here, and the slaves
4022 * list won't change. This doesn't solve the problem
4023 * of setting the slave's hw address while it is
4024 * transmitting, but the assumption is that the base
4025 * driver can handle that.
4026 *
4027 * TODO: figure out a way to safely iterate the slaves
4028 * list, but without holding a lock around the actual
4029 * call to the base driver.
4030 */
4031
4032 bond_for_each_slave(bond, slave, i) {
4033 dprintk("slave %p %s\n", slave, slave->dev->name);
4034
4035 if (slave->dev->set_mac_address == NULL) {
4036 res = -EOPNOTSUPP;
4037 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4038 goto unwind;
4039 }
4040
4041 res = dev_set_mac_address(slave->dev, addr);
4042 if (res) {
4043 /* TODO: consider downing the slave
4044 * and retry ?
4045 * User should expect communications
4046 * breakage anyway until ARP finish
4047 * updating, so...
4048 */
4049 dprintk("err %d %s\n", res, slave->dev->name);
4050 goto unwind;
4051 }
4052 }
4053
4054 /* success */
4055 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4056 return 0;
4057
4058unwind:
4059 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4060 tmp_sa.sa_family = bond_dev->type;
4061
4062 /* unwind from head to the slave that failed */
4063 stop_at = slave;
4064 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4065 int tmp_res;
4066
4067 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4068 if (tmp_res) {
4069 dprintk("unwind err %d dev %s\n", tmp_res,
4070 slave->dev->name);
4071 }
4072 }
4073
4074 return res;
4075}
4076
4077static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4078{
4079 struct bonding *bond = bond_dev->priv;
4080 struct slave *slave, *start_at;
4081 int i;
4082 int res = 1;
4083
4084 read_lock(&bond->lock);
4085
4086 if (!BOND_IS_OK(bond)) {
4087 goto out;
4088 }
4089
4090 read_lock(&bond->curr_slave_lock);
4091 slave = start_at = bond->curr_active_slave;
4092 read_unlock(&bond->curr_slave_lock);
4093
4094 if (!slave) {
4095 goto out;
4096 }
4097
4098 bond_for_each_slave_from(bond, slave, i, start_at) {
4099 if (IS_UP(slave->dev) &&
4100 (slave->link == BOND_LINK_UP) &&
4101 (slave->state == BOND_STATE_ACTIVE)) {
4102 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4103
4104 write_lock(&bond->curr_slave_lock);
4105 bond->curr_active_slave = slave->next;
4106 write_unlock(&bond->curr_slave_lock);
4107
4108 break;
4109 }
4110 }
4111
4112
4113out:
4114 if (res) {
4115 /* no suitable interface, frame not sent */
4116 dev_kfree_skb(skb);
4117 }
4118 read_unlock(&bond->lock);
4119 return 0;
4120}
4121
075897ce 4122
1da177e4
LT		 4123/*
4124 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4125 * the bond has a usable interface.
4126 */
4127static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4128{
4129 struct bonding *bond = bond_dev->priv;
4130 int res = 1;
4131
1da177e4
LT		 4132 read_lock(&bond->lock);
4133 read_lock(&bond->curr_slave_lock);
4134
4135 if (!BOND_IS_OK(bond)) {
4136 goto out;
4137 }
4138
075897ce
JL		 4139 if (!bond->curr_active_slave)
4140 goto out;
4141
075897ce
JL		 4142 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4143
1da177e4
LT		 4144out:
4145 if (res) {
4146 /* no suitable interface, frame not sent */
4147 dev_kfree_skb(skb);
4148 }
4149 read_unlock(&bond->curr_slave_lock);
4150 read_unlock(&bond->lock);
4151 return 0;
4152}
4153
4154/*
169a3e66
JV		 4155 * In bond_xmit_xor() , we determine the output device by using a pre-
4156 * determined xmit_hash_policy(), If the selected device is not enabled,
4157 * find the next active slave.
1da177e4
LT		 4158 */
4159static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4160{
4161 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4162 struct slave *slave, *start_at;
4163 int slave_no;
4164 int i;
4165 int res = 1;
4166
4167 read_lock(&bond->lock);
4168
4169 if (!BOND_IS_OK(bond)) {
4170 goto out;
4171 }
4172
169a3e66 4173 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4174
4175 bond_for_each_slave(bond, slave, i) {
4176 slave_no--;
4177 if (slave_no < 0) {
4178 break;
4179 }
4180 }
4181
4182 start_at = slave;
4183
4184 bond_for_each_slave_from(bond, slave, i, start_at) {
4185 if (IS_UP(slave->dev) &&
4186 (slave->link == BOND_LINK_UP) &&
4187 (slave->state == BOND_STATE_ACTIVE)) {
4188 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4189 break;
4190 }
4191 }
4192
4193out:
4194 if (res) {
4195 /* no suitable interface, frame not sent */
4196 dev_kfree_skb(skb);
4197 }
4198 read_unlock(&bond->lock);
4199 return 0;
4200}
4201
4202/*
4203 * in broadcast mode, we send everything to all usable interfaces.
4204 */
4205static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4206{
4207 struct bonding *bond = bond_dev->priv;
4208 struct slave *slave, *start_at;
4209 struct net_device *tx_dev = NULL;
4210 int i;
4211 int res = 1;
4212
4213 read_lock(&bond->lock);
4214
4215 if (!BOND_IS_OK(bond)) {
4216 goto out;
4217 }
4218
4219 read_lock(&bond->curr_slave_lock);
4220 start_at = bond->curr_active_slave;
4221 read_unlock(&bond->curr_slave_lock);
4222
4223 if (!start_at) {
4224 goto out;
4225 }
4226
4227 bond_for_each_slave_from(bond, slave, i, start_at) {
4228 if (IS_UP(slave->dev) &&
4229 (slave->link == BOND_LINK_UP) &&
4230 (slave->state == BOND_STATE_ACTIVE)) {
4231 if (tx_dev) {
4232 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4233 if (!skb2) {
4234 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4235 ": %s: Error: bond_xmit_broadcast(): "
4236 "skb_clone() failed\n",
4237 bond_dev->name);
1da177e4
LT		 4238 continue;
4239 }
4240
4241 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4242 if (res) {
4243 dev_kfree_skb(skb2);
4244 continue;
4245 }
4246 }
4247 tx_dev = slave->dev;
4248 }
4249 }
4250
4251 if (tx_dev) {
4252 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4253 }
4254
4255out:
4256 if (res) {
4257 /* no suitable interface, frame not sent */
4258 dev_kfree_skb(skb);
4259 }
4260 /* frame sent to all suitable interfaces */
4261 read_unlock(&bond->lock);
4262 return 0;
4263}
4264
4265/*------------------------- Device initialization ---------------------------*/
4266
4267/*
4268 * set bond mode specific net device operations
4269 */
a77b5325 4270void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4271{
169a3e66
JV		 4272 struct net_device *bond_dev = bond->dev;
4273
1da177e4
LT		 4274 switch (mode) {
4275 case BOND_MODE_ROUNDROBIN:
4276 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4277 break;
4278 case BOND_MODE_ACTIVEBACKUP:
4279 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4280 break;
4281 case BOND_MODE_XOR:
4282 bond_dev->hard_start_xmit = bond_xmit_xor;
169a3e66
JV		 4283 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4284 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4285 else
4286 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4
LT		 4287 break;
4288 case BOND_MODE_BROADCAST:
4289 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4290 break;
4291 case BOND_MODE_8023AD:
8f903c70 4292 bond_set_master_3ad_flags(bond);
1da177e4 4293 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
169a3e66
JV		 4294 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4295 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4296 else
4297 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4 4298 break;
1da177e4 4299 case BOND_MODE_ALB:
8f903c70
JV		 4300 bond_set_master_alb_flags(bond);
4301 /* FALLTHRU */
4302 case BOND_MODE_TLB:
1da177e4
LT		 4303 bond_dev->hard_start_xmit = bond_alb_xmit;
4304 bond_dev->set_mac_address = bond_alb_set_mac_address;
4305 break;
4306 default:
4307 /* Should never happen, mode already checked */
4308 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4309 ": %s: Error: Unknown bonding mode %d\n",
4310 bond_dev->name,
1da177e4
LT		 4311 mode);
4312 break;
4313 }
4314}
4315
217df670
JV		 4316static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4317 struct ethtool_drvinfo *drvinfo)
4318{
4319 strncpy(drvinfo->driver, DRV_NAME, 32);
4320 strncpy(drvinfo->version, DRV_VERSION, 32);
4321 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4322}
4323
7282d491 4324static const struct ethtool_ops bond_ethtool_ops = {
217df670 4325 .get_drvinfo = bond_ethtool_get_drvinfo,
8531c5ff
AK		 4326};
4327
1da177e4
LT		 4328/*
4329 * Does not allocate but creates a /proc entry.
4330 * Allowed to fail.
4331 */
3c535952 4332static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4333{
4334 struct bonding *bond = bond_dev->priv;
4335
4336 dprintk("Begin bond_init for %s\n", bond_dev->name);
4337
4338 /* initialize rwlocks */
4339 rwlock_init(&bond->lock);
4340 rwlock_init(&bond->curr_slave_lock);
4341
4342 bond->params = *params; /* copy params struct */
4343
4344 /* Initialize pointers */
4345 bond->first_slave = NULL;
4346 bond->curr_active_slave = NULL;
4347 bond->current_arp_slave = NULL;
4348 bond->primary_slave = NULL;
4349 bond->dev = bond_dev;
1053f62c 4350 bond->send_grat_arp = 0;
d90a162a 4351 bond->setup_by_slave = 0;
1da177e4
LT		 4352 INIT_LIST_HEAD(&bond->vlan_list);
4353
4354 /* Initialize the device entry points */
4355 bond_dev->open = bond_open;
4356 bond_dev->stop = bond_close;
4357 bond_dev->get_stats = bond_get_stats;
4358 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4359 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4360 bond_dev->set_multicast_list = bond_set_multicast_list;
4361 bond_dev->change_mtu = bond_change_mtu;
4362 bond_dev->set_mac_address = bond_set_mac_address;
4363
169a3e66 4364 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4365
4366 bond_dev->destructor = free_netdev;
4367
4368 /* Initialize the device options */
4369 bond_dev->tx_queue_len = 0;
4370 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4371 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4372
4373 /* At first, we block adding VLANs. That's the only way to
4374 * prevent problems that occur when adding VLANs over an
4375 * empty bond. The block will be removed once non-challenged
4376 * slaves are enslaved.
4377 */
4378 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4379
932ff279 4380 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4381 * transmitting */
4382 bond_dev->features |= NETIF_F_LLTX;
4383
4384 /* By default, we declare the bond to be fully
4385 * VLAN hardware accelerated capable. Special
4386 * care is taken in the various xmit functions
4387 * when there are slaves that are not hw accel
4388 * capable
4389 */
4390 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4391 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4392 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4393 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4394 NETIF_F_HW_VLAN_RX |
4395 NETIF_F_HW_VLAN_FILTER);
4396
4397#ifdef CONFIG_PROC_FS
4398 bond_create_proc_entry(bond);
4399#endif
1da177e4
LT		 4400 list_add_tail(&bond->bond_list, &bond_dev_list);
4401
4402 return 0;
4403}
4404
4405/* De-initialize device specific data.
4406 * Caller must hold rtnl_lock.
4407 */
a77b5325 4408void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4409{
4410 struct bonding *bond = bond_dev->priv;
4411
4412 list_del(&bond->bond_list);
4413
4414#ifdef CONFIG_PROC_FS
4415 bond_remove_proc_entry(bond);
4416#endif
4417}
4418
4419/* Unregister and free all bond devices.
4420 * Caller must hold rtnl_lock.
4421 */
4422static void bond_free_all(void)
4423{
4424 struct bonding *bond, *nxt;
4425
4426 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4427 struct net_device *bond_dev = bond->dev;
4428
70298705 4429 bond_mc_list_destroy(bond);
4430 /* Release the bonded slaves */
4431 bond_release_all(bond_dev);
1da177e4 4432 bond_deinit(bond_dev);
3201e656 4433 unregister_netdevice(bond_dev);
1da177e4
LT		 4434 }
4435
4436#ifdef CONFIG_PROC_FS
4437 bond_destroy_proc_dir();
4438#endif
4439}
4440
4441/*------------------------- Module initialization ---------------------------*/
4442
4443/*
4444 * Convert string input module parms. Accept either the
4445 * number of the mode or its string name.
4446 */
a77b5325 4447int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
1da177e4
LT		 4448{
4449 int i;
4450
4451 for (i = 0; tbl[i].modename; i++) {
4452 if ((isdigit(*mode_arg) &&
4453 tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
4454 (strncmp(mode_arg, tbl[i].modename,
4455 strlen(tbl[i].modename)) == 0)) {
4456 return tbl[i].mode;
4457 }
4458 }
4459
4460 return -1;
4461}
4462
4463static int bond_check_params(struct bond_params *params)
4464{
f5b2b966
JV		 4465 int arp_validate_value;
4466
1da177e4
LT		 4467 /*
4468 * Convert string parameters.
4469 */
4470 if (mode) {
4471 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4472 if (bond_mode == -1) {
4473 printk(KERN_ERR DRV_NAME
4474 ": Error: Invalid bonding mode \"%s\"\n",
4475 mode == NULL ? "NULL" : mode);
4476 return -EINVAL;
4477 }
4478 }
4479
169a3e66
JV		 4480 if (xmit_hash_policy) {
4481 if ((bond_mode != BOND_MODE_XOR) &&
4482 (bond_mode != BOND_MODE_8023AD)) {
4483 printk(KERN_INFO DRV_NAME
4484 ": xor_mode param is irrelevant in mode %s\n",
4485 bond_mode_name(bond_mode));
4486 } else {
4487 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4488 xmit_hashtype_tbl);
4489 if (xmit_hashtype == -1) {
4490 printk(KERN_ERR DRV_NAME
4491 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4492 xmit_hash_policy == NULL ? "NULL" :
4493 xmit_hash_policy);
4494 return -EINVAL;
4495 }
4496 }
4497 }
4498
1da177e4
LT		 4499 if (lacp_rate) {
4500 if (bond_mode != BOND_MODE_8023AD) {
4501 printk(KERN_INFO DRV_NAME
4502 ": lacp_rate param is irrelevant in mode %s\n",
4503 bond_mode_name(bond_mode));
4504 } else {
4505 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4506 if (lacp_fast == -1) {
4507 printk(KERN_ERR DRV_NAME
4508 ": Error: Invalid lacp rate \"%s\"\n",
4509 lacp_rate == NULL ? "NULL" : lacp_rate);
4510 return -EINVAL;
4511 }
4512 }
4513 }
4514
4515 if (max_bonds < 1 || max_bonds > INT_MAX) {
4516 printk(KERN_WARNING DRV_NAME
4517 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4518 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
1da177e4
LT		 4519 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4520 max_bonds = BOND_DEFAULT_MAX_BONDS;
4521 }
4522
4523 if (miimon < 0) {
4524 printk(KERN_WARNING DRV_NAME
4525 ": Warning: miimon module parameter (%d), "
4526 "not in range 0-%d, so it was reset to %d\n",
4527 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4528 miimon = BOND_LINK_MON_INTERV;
4529 }
4530
4531 if (updelay < 0) {
4532 printk(KERN_WARNING DRV_NAME
4533 ": Warning: updelay module parameter (%d), "
4534 "not in range 0-%d, so it was reset to 0\n",
4535 updelay, INT_MAX);
4536 updelay = 0;
4537 }
4538
4539 if (downdelay < 0) {
4540 printk(KERN_WARNING DRV_NAME
4541 ": Warning: downdelay module parameter (%d), "
4542 "not in range 0-%d, so it was reset to 0\n",
4543 downdelay, INT_MAX);
4544 downdelay = 0;
4545 }
4546
4547 if ((use_carrier != 0) && (use_carrier != 1)) {
4548 printk(KERN_WARNING DRV_NAME
4549 ": Warning: use_carrier module parameter (%d), "
4550 "not of valid value (0/1), so it was set to 1\n",
4551 use_carrier);
4552 use_carrier = 1;
4553 }
4554
4555 /* reset values for 802.3ad */
4556 if (bond_mode == BOND_MODE_8023AD) {
4557 if (!miimon) {
4558 printk(KERN_WARNING DRV_NAME
4559 ": Warning: miimon must be specified, "
4560 "otherwise bonding will not detect link "
4561 "failure, speed and duplex which are "
4562 "essential for 802.3ad operation\n");
4563 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4564 miimon = 100;
4565 }
4566 }
4567
4568 /* reset values for TLB/ALB */
4569 if ((bond_mode == BOND_MODE_TLB) ||
4570 (bond_mode == BOND_MODE_ALB)) {
4571 if (!miimon) {
4572 printk(KERN_WARNING DRV_NAME
4573 ": Warning: miimon must be specified, "
4574 "otherwise bonding will not detect link "
4575 "failure and link speed which are essential "
4576 "for TLB/ALB load balancing\n");
4577 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4578 miimon = 100;
4579 }
4580 }
4581
4582 if (bond_mode == BOND_MODE_ALB) {
4583 printk(KERN_NOTICE DRV_NAME
4584 ": In ALB mode you might experience client "
4585 "disconnections upon reconnection of a link if the "
4586 "bonding module updelay parameter (%d msec) is "
4587 "incompatible with the forwarding delay time of the "
4588 "switch\n",
4589 updelay);
4590 }
4591
4592 if (!miimon) {
4593 if (updelay || downdelay) {
4594 /* just warn the user the up/down delay will have
4595 * no effect since miimon is zero...
4596 */
4597 printk(KERN_WARNING DRV_NAME
4598 ": Warning: miimon module parameter not set "
4599 "and updelay (%d) or downdelay (%d) module "
4600 "parameter is set; updelay and downdelay have "
4601 "no effect unless miimon is set\n",
4602 updelay, downdelay);
4603 }
4604 } else {
4605 /* don't allow arp monitoring */
4606 if (arp_interval) {
4607 printk(KERN_WARNING DRV_NAME
4608 ": Warning: miimon (%d) and arp_interval (%d) "
4609 "can't be used simultaneously, disabling ARP "
4610 "monitoring\n",
4611 miimon, arp_interval);
4612 arp_interval = 0;
4613 }
4614
4615 if ((updelay % miimon) != 0) {
4616 printk(KERN_WARNING DRV_NAME
4617 ": Warning: updelay (%d) is not a multiple "
4618 "of miimon (%d), updelay rounded to %d ms\n",
4619 updelay, miimon, (updelay / miimon) * miimon);
4620 }
4621
4622 updelay /= miimon;
4623
4624 if ((downdelay % miimon) != 0) {
4625 printk(KERN_WARNING DRV_NAME
4626 ": Warning: downdelay (%d) is not a multiple "
4627 "of miimon (%d), downdelay rounded to %d ms\n",
4628 downdelay, miimon,
4629 (downdelay / miimon) * miimon);
4630 }
4631
4632 downdelay /= miimon;
4633 }
4634
4635 if (arp_interval < 0) {
4636 printk(KERN_WARNING DRV_NAME
4637 ": Warning: arp_interval module parameter (%d) "
4638 ", not in range 0-%d, so it was reset to %d\n",
4639 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4640 arp_interval = BOND_LINK_ARP_INTERV;
4641 }
4642
4643 for (arp_ip_count = 0;
4644 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4645 arp_ip_count++) {
4646 /* not complete check, but should be good enough to
4647 catch mistakes */
4648 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4649 printk(KERN_WARNING DRV_NAME
4650 ": Warning: bad arp_ip_target module parameter "
4651 "(%s), ARP monitoring will not be performed\n",
4652 arp_ip_target[arp_ip_count]);
4653 arp_interval = 0;
4654 } else {
d3bb52b0 4655 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4656 arp_target[arp_ip_count] = ip;
4657 }
4658 }
4659
4660 if (arp_interval && !arp_ip_count) {
4661 /* don't allow arping if no arp_ip_target given... */
4662 printk(KERN_WARNING DRV_NAME
4663 ": Warning: arp_interval module parameter (%d) "
4664 "specified without providing an arp_ip_target "
4665 "parameter, arp_interval was reset to 0\n",
4666 arp_interval);
4667 arp_interval = 0;
4668 }
4669
f5b2b966
JV		 4670 if (arp_validate) {
4671 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4672 printk(KERN_ERR DRV_NAME
4673 ": arp_validate only supported in active-backup mode\n");
4674 return -EINVAL;
4675 }
4676 if (!arp_interval) {
4677 printk(KERN_ERR DRV_NAME
4678 ": arp_validate requires arp_interval\n");
4679 return -EINVAL;
4680 }
4681
4682 arp_validate_value = bond_parse_parm(arp_validate,
4683 arp_validate_tbl);
4684 if (arp_validate_value == -1) {
4685 printk(KERN_ERR DRV_NAME
4686 ": Error: invalid arp_validate \"%s\"\n",
4687 arp_validate == NULL ? "NULL" : arp_validate);
4688 return -EINVAL;
4689 }
4690 } else
4691 arp_validate_value = 0;
4692
1da177e4
LT		 4693 if (miimon) {
4694 printk(KERN_INFO DRV_NAME
4695 ": MII link monitoring set to %d ms\n",
4696 miimon);
4697 } else if (arp_interval) {
4698 int i;
4699
4700 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4701 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4702 arp_interval,
4703 arp_validate_tbl[arp_validate_value].modename,
4704 arp_ip_count);
1da177e4
LT		 4705
4706 for (i = 0; i < arp_ip_count; i++)
4707 printk (" %s", arp_ip_target[i]);
4708
4709 printk("\n");
4710
4711 } else {
4712 /* miimon and arp_interval not set, we need one so things
4713 * work as expected, see bonding.txt for details
4714 */
4715 printk(KERN_WARNING DRV_NAME
4716 ": Warning: either miimon or arp_interval and "
4717 "arp_ip_target module parameters must be specified, "
4718 "otherwise bonding will not detect link failures! see "
4719 "bonding.txt for details.\n");
4720 }
4721
4722 if (primary && !USES_PRIMARY(bond_mode)) {
4723 /* currently, using a primary only makes sense
4724 * in active backup, TLB or ALB modes
4725 */
4726 printk(KERN_WARNING DRV_NAME
4727 ": Warning: %s primary device specified but has no "
4728 "effect in %s mode\n",
4729 primary, bond_mode_name(bond_mode));
4730 primary = NULL;
4731 }
4732
dd957c57
JV		 4733 if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
4734 printk(KERN_WARNING DRV_NAME
4735 ": Warning: fail_over_mac only affects "
4736 "active-backup mode.\n");
4737
1da177e4
LT		 4738 /* fill params struct with the proper values */
4739 params->mode = bond_mode;
169a3e66 4740 params->xmit_policy = xmit_hashtype;
1da177e4
LT		 4741 params->miimon = miimon;
4742 params->arp_interval = arp_interval;
f5b2b966 4743 params->arp_validate = arp_validate_value;
1da177e4
LT		 4744 params->updelay = updelay;
4745 params->downdelay = downdelay;
4746 params->use_carrier = use_carrier;
4747 params->lacp_fast = lacp_fast;
4748 params->primary[0] = 0;
dd957c57 4749 params->fail_over_mac = fail_over_mac;
1da177e4
LT		 4750
4751 if (primary) {
4752 strncpy(params->primary, primary, IFNAMSIZ);
4753 params->primary[IFNAMSIZ - 1] = 0;
4754 }
4755
4756 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4757
4758 return 0;
4759}
4760
0daa2303
PZ		 4761static struct lock_class_key bonding_netdev_xmit_lock_key;
4762
dfe60397 4763/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 4764 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 4765 * Caller must NOT hold rtnl_lock; we need to release it here before we
4766 * set up our sysfs entries.
4767 */
4768int bond_create(char *name, struct bond_params *params, struct bonding **newbond)
4769{
4770 struct net_device *bond_dev;
4771 int res;
4772
4773 rtnl_lock();
e4b91c48
JV		 4774 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
4775 ether_setup);
dfe60397
MW		 4776 if (!bond_dev) {
4777 printk(KERN_ERR DRV_NAME
4778 ": %s: eek! can't alloc netdev!\n",
4779 name);
4780 res = -ENOMEM;
4781 goto out_rtnl;
4782 }
4783
e4b91c48
JV		 4784 if (!name) {
4785 res = dev_alloc_name(bond_dev, "bond%d");
4786 if (res < 0)
4787 goto out_netdev;
4788 }
4789
dfe60397
MW		 4790 /* bond_init() must be called after dev_alloc_name() (for the
4791 * /proc files), but before register_netdevice(), because we
4792 * need to set function pointers.
4793 */
4794
4795 res = bond_init(bond_dev, params);
4796 if (res < 0) {
4797 goto out_netdev;
4798 }
4799
dfe60397
MW		 4800 res = register_netdevice(bond_dev);
4801 if (res < 0) {
4802 goto out_bond;
4803 }
0daa2303
PZ		 4804
4805 lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
4806
dfe60397
MW		 4807 if (newbond)
4808 *newbond = bond_dev->priv;
4809
ff59c456
JV		 4810 netif_carrier_off(bond_dev);
4811
dfe60397 4812 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 4813 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 4814 if (res < 0) {
4815 rtnl_lock();
4816 goto out_bond;
4817 }
4818
4819 return 0;
4820
dfe60397
MW		 4821out_bond:
4822 bond_deinit(bond_dev);
4823out_netdev:
4824 free_netdev(bond_dev);
4825out_rtnl:
4826 rtnl_unlock();
dfe60397
MW		 4827 return res;
4828}
4829
1da177e4
LT		 4830static int __init bonding_init(void)
4831{
1da177e4
LT		 4832 int i;
4833 int res;
4834
4835 printk(KERN_INFO "%s", version);
4836
dfe60397 4837 res = bond_check_params(&bonding_defaults);
1da177e4 4838 if (res) {
dfe60397 4839 goto out;
1da177e4
LT		 4840 }
4841
1da177e4
LT		 4842#ifdef CONFIG_PROC_FS
4843 bond_create_proc_dir();
4844#endif
1da177e4 4845 for (i = 0; i < max_bonds; i++) {
e4b91c48 4846 res = bond_create(NULL, &bonding_defaults, NULL);
dfe60397
MW		 4847 if (res)
4848 goto err;
1da177e4
LT		 4849 }
4850
b76cdba9
MW		 4851 res = bond_create_sysfs();
4852 if (res)
4853 goto err;
4854
1da177e4 4855 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4856 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 4857
dfe60397
MW		 4858 goto out;
4859err:
40abc270 4860 rtnl_lock();
1da177e4 4861 bond_free_all();
b76cdba9 4862 bond_destroy_sysfs();
1da177e4 4863 rtnl_unlock();
dfe60397 4864out:
1da177e4 4865 return res;
dfe60397 4866
1da177e4
LT		 4867}
4868
4869static void __exit bonding_exit(void)
4870{
4871 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4872 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4
LT		 4873
4874 rtnl_lock();
4875 bond_free_all();
b76cdba9 4876 bond_destroy_sysfs();
1da177e4
LT		 4877 rtnl_unlock();
4878}
4879
4880module_init(bonding_init);
4881module_exit(bonding_exit);
4882MODULE_LICENSE("GPL");
4883MODULE_VERSION(DRV_VERSION);
4884MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4885MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4886MODULE_SUPPORTED_DEVICE("most ethernet devices");
4887
4888/*
4889 * Local variables:
4890 * c-indent-level: 8
4891 * c-basic-offset: 8
4892 * tab-width: 8
4893 * End:
4894 */
4895
Clone of davem's net-next-2.6 tree