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[NETFILTER]: hashlimit match: fix random initialization
[net-next-2.6.git] / drivers / net / bonding / bond_main.c
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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
36#include <linux/config.h>
37#include <linux/kernel.h>
38#include <linux/module.h>
39#include <linux/sched.h>
40#include <linux/types.h>
41#include <linux/fcntl.h>
42#include <linux/interrupt.h>
43#include <linux/ptrace.h>
44#include <linux/ioport.h>
45#include <linux/in.h>
169a3e66 46#include <net/ip.h>
1da177e4 47#include <linux/ip.h>
169a3e66
JV		 48#include <linux/tcp.h>
49#include <linux/udp.h>
1da177e4
LT		 50#include <linux/slab.h>
51#include <linux/string.h>
52#include <linux/init.h>
53#include <linux/timer.h>
54#include <linux/socket.h>
55#include <linux/ctype.h>
56#include <linux/inet.h>
57#include <linux/bitops.h>
58#include <asm/system.h>
59#include <asm/io.h>
60#include <asm/dma.h>
61#include <asm/uaccess.h>
62#include <linux/errno.h>
63#include <linux/netdevice.h>
64#include <linux/inetdevice.h>
65#include <linux/etherdevice.h>
66#include <linux/skbuff.h>
67#include <net/sock.h>
68#include <linux/rtnetlink.h>
69#include <linux/proc_fs.h>
70#include <linux/seq_file.h>
71#include <linux/smp.h>
72#include <linux/if_ether.h>
73#include <net/arp.h>
74#include <linux/mii.h>
75#include <linux/ethtool.h>
76#include <linux/if_vlan.h>
77#include <linux/if_bonding.h>
c3ade5ca 78#include <net/route.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, };
12479f9a 100struct bond_params bonding_defaults;
1da177e4
LT		 101
102module_param(max_bonds, int, 0);
103MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
104module_param(miimon, int, 0);
105MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
106module_param(updelay, int, 0);
107MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
108module_param(downdelay, int, 0);
2ac47660
MW		 109MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
110 "in milliseconds");
1da177e4 111module_param(use_carrier, int, 0);
2ac47660
MW		 112MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
113 "0 for off, 1 for on (default)");
1da177e4 114module_param(mode, charp, 0);
2ac47660
MW		 115MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
116 "1 for active-backup, 2 for balance-xor, "
117 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
118 "6 for balance-alb");
1da177e4
LT		 119module_param(primary, charp, 0);
120MODULE_PARM_DESC(primary, "Primary network device to use");
121module_param(lacp_rate, charp, 0);
2ac47660
MW		 122MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
123 "(slow/fast)");
169a3e66 124module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 125MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
126 ", 1 for layer 3+4");
1da177e4
LT		 127module_param(arp_interval, int, 0);
128MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
129module_param_array(arp_ip_target, charp, NULL, 0);
130MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
131
132/*----------------------------- Global variables ----------------------------*/
133
f71e1309 134static const char * const version =
1da177e4
LT		 135 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
136
12479f9a 137LIST_HEAD(bond_dev_list);
1da177e4
LT		 138
139#ifdef CONFIG_PROC_FS
140static struct proc_dir_entry *bond_proc_dir = NULL;
141#endif
142
b76cdba9 143extern struct rw_semaphore bonding_rwsem;
1da177e4
LT		 144static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
145static int arp_ip_count = 0;
1da177e4 146static int bond_mode = BOND_MODE_ROUNDROBIN;
169a3e66 147static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
1da177e4 148static int lacp_fast = 0;
217df670 149
1da177e4 150
12479f9a 151struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 152{ "slow", AD_LACP_SLOW},
153{ "fast", AD_LACP_FAST},
154{ NULL, -1},
155};
156
12479f9a 157struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 158{ "balance-rr", BOND_MODE_ROUNDROBIN},
159{ "active-backup", BOND_MODE_ACTIVEBACKUP},
160{ "balance-xor", BOND_MODE_XOR},
161{ "broadcast", BOND_MODE_BROADCAST},
162{ "802.3ad", BOND_MODE_8023AD},
163{ "balance-tlb", BOND_MODE_TLB},
164{ "balance-alb", BOND_MODE_ALB},
165{ NULL, -1},
166};
167
12479f9a 168struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 169{ "layer2", BOND_XMIT_POLICY_LAYER2},
170{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
171{ NULL, -1},
172};
173
1da177e4
LT		 174/*-------------------------- Forward declarations ---------------------------*/
175
c3ade5ca 176static void bond_send_gratuitous_arp(struct bonding *bond);
1da177e4
LT		 177
178/*---------------------------- General routines -----------------------------*/
179
a77b5325 180const char *bond_mode_name(int mode)
1da177e4
LT		 181{
182 switch (mode) {
183 case BOND_MODE_ROUNDROBIN :
184 return "load balancing (round-robin)";
185 case BOND_MODE_ACTIVEBACKUP :
186 return "fault-tolerance (active-backup)";
187 case BOND_MODE_XOR :
188 return "load balancing (xor)";
189 case BOND_MODE_BROADCAST :
190 return "fault-tolerance (broadcast)";
191 case BOND_MODE_8023AD:
192 return "IEEE 802.3ad Dynamic link aggregation";
193 case BOND_MODE_TLB:
194 return "transmit load balancing";
195 case BOND_MODE_ALB:
196 return "adaptive load balancing";
197 default:
198 return "unknown";
199 }
200}
201
202/*---------------------------------- VLAN -----------------------------------*/
203
204/**
205 * bond_add_vlan - add a new vlan id on bond
206 * @bond: bond that got the notification
207 * @vlan_id: the vlan id to add
208 *
209 * Returns -ENOMEM if allocation failed.
210 */
211static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
212{
213 struct vlan_entry *vlan;
214
215 dprintk("bond: %s, vlan id %d\n",
216 (bond ? bond->dev->name: "None"), vlan_id);
217
218 vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
219 if (!vlan) {
220 return -ENOMEM;
221 }
222
223 INIT_LIST_HEAD(&vlan->vlan_list);
224 vlan->vlan_id = vlan_id;
c3ade5ca 225 vlan->vlan_ip = 0;
1da177e4
LT		 226
227 write_lock_bh(&bond->lock);
228
229 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
230
231 write_unlock_bh(&bond->lock);
232
233 dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
234
235 return 0;
236}
237
238/**
239 * bond_del_vlan - delete a vlan id from bond
240 * @bond: bond that got the notification
241 * @vlan_id: the vlan id to delete
242 *
243 * returns -ENODEV if @vlan_id was not found in @bond.
244 */
245static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
246{
247 struct vlan_entry *vlan, *next;
248 int res = -ENODEV;
249
250 dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
251
252 write_lock_bh(&bond->lock);
253
254 list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) {
255 if (vlan->vlan_id == vlan_id) {
256 list_del(&vlan->vlan_list);
257
258 if ((bond->params.mode == BOND_MODE_TLB) ||
259 (bond->params.mode == BOND_MODE_ALB)) {
260 bond_alb_clear_vlan(bond, vlan_id);
261 }
262
263 dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
264 bond->dev->name);
265
266 kfree(vlan);
267
268 if (list_empty(&bond->vlan_list) &&
269 (bond->slave_cnt == 0)) {
270 /* Last VLAN removed and no slaves, so
271 * restore block on adding VLANs. This will
272 * be removed once new slaves that are not
273 * VLAN challenged will be added.
274 */
275 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
276 }
277
278 res = 0;
279 goto out;
280 }
281 }
282
283 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
284 bond->dev->name);
285
286out:
287 write_unlock_bh(&bond->lock);
288 return res;
289}
290
291/**
292 * bond_has_challenged_slaves
293 * @bond: the bond we're working on
294 *
295 * Searches the slave list. Returns 1 if a vlan challenged slave
296 * was found, 0 otherwise.
297 *
298 * Assumes bond->lock is held.
299 */
300static int bond_has_challenged_slaves(struct bonding *bond)
301{
302 struct slave *slave;
303 int i;
304
305 bond_for_each_slave(bond, slave, i) {
306 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
307 dprintk("found VLAN challenged slave - %s\n",
308 slave->dev->name);
309 return 1;
310 }
311 }
312
313 dprintk("no VLAN challenged slaves found\n");
314 return 0;
315}
316
317/**
318 * bond_next_vlan - safely skip to the next item in the vlans list.
319 * @bond: the bond we're working on
320 * @curr: item we're advancing from
321 *
322 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
323 * or @curr->next otherwise (even if it is @curr itself again).
324 *
325 * Caller must hold bond->lock
326 */
327struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
328{
329 struct vlan_entry *next, *last;
330
331 if (list_empty(&bond->vlan_list)) {
332 return NULL;
333 }
334
335 if (!curr) {
336 next = list_entry(bond->vlan_list.next,
337 struct vlan_entry, vlan_list);
338 } else {
339 last = list_entry(bond->vlan_list.prev,
340 struct vlan_entry, vlan_list);
341 if (last == curr) {
342 next = list_entry(bond->vlan_list.next,
343 struct vlan_entry, vlan_list);
344 } else {
345 next = list_entry(curr->vlan_list.next,
346 struct vlan_entry, vlan_list);
347 }
348 }
349
350 return next;
351}
352
353/**
354 * bond_dev_queue_xmit - Prepare skb for xmit.
355 *
356 * @bond: bond device that got this skb for tx.
357 * @skb: hw accel VLAN tagged skb to transmit
358 * @slave_dev: slave that is supposed to xmit this skbuff
359 *
360 * When the bond gets an skb to transmit that is
361 * already hardware accelerated VLAN tagged, and it
362 * needs to relay this skb to a slave that is not
363 * hw accel capable, the skb needs to be "unaccelerated",
364 * i.e. strip the hwaccel tag and re-insert it as part
365 * of the payload.
366 */
367int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
368{
369 unsigned short vlan_id;
370
371 if (!list_empty(&bond->vlan_list) &&
372 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
373 vlan_get_tag(skb, &vlan_id) == 0) {
374 skb->dev = slave_dev;
375 skb = vlan_put_tag(skb, vlan_id);
376 if (!skb) {
377 /* vlan_put_tag() frees the skb in case of error,
378 * so return success here so the calling functions
379 * won't attempt to free is again.
380 */
381 return 0;
382 }
383 } else {
384 skb->dev = slave_dev;
385 }
386
387 skb->priority = 1;
388 dev_queue_xmit(skb);
389
390 return 0;
391}
392
393/*
394 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
395 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
396 * lock because:
397 * a. This operation is performed in IOCTL context,
398 * b. The operation is protected by the RTNL semaphore in the 8021q code,
399 * c. Holding a lock with BH disabled while directly calling a base driver
400 * entry point is generally a BAD idea.
401 *
402 * The design of synchronization/protection for this operation in the 8021q
403 * module is good for one or more VLAN devices over a single physical device
404 * and cannot be extended for a teaming solution like bonding, so there is a
405 * potential race condition here where a net device from the vlan group might
406 * be referenced (either by a base driver or the 8021q code) while it is being
407 * removed from the system. However, it turns out we're not making matters
408 * worse, and if it works for regular VLAN usage it will work here too.
409*/
410
411/**
412 * bond_vlan_rx_register - Propagates registration to slaves
413 * @bond_dev: bonding net device that got called
414 * @grp: vlan group being registered
415 */
416static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
417{
418 struct bonding *bond = bond_dev->priv;
419 struct slave *slave;
420 int i;
421
422 bond->vlgrp = grp;
423
424 bond_for_each_slave(bond, slave, i) {
425 struct net_device *slave_dev = slave->dev;
426
427 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
428 slave_dev->vlan_rx_register) {
429 slave_dev->vlan_rx_register(slave_dev, grp);
430 }
431 }
432}
433
434/**
435 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
436 * @bond_dev: bonding net device that got called
437 * @vid: vlan id being added
438 */
439static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
440{
441 struct bonding *bond = bond_dev->priv;
442 struct slave *slave;
443 int i, res;
444
445 bond_for_each_slave(bond, slave, i) {
446 struct net_device *slave_dev = slave->dev;
447
448 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
449 slave_dev->vlan_rx_add_vid) {
450 slave_dev->vlan_rx_add_vid(slave_dev, vid);
451 }
452 }
453
454 res = bond_add_vlan(bond, vid);
455 if (res) {
456 printk(KERN_ERR DRV_NAME
4e0952c7 457 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 458 bond_dev->name, vid);
459 }
460}
461
462/**
463 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
464 * @bond_dev: bonding net device that got called
465 * @vid: vlan id being removed
466 */
467static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
468{
469 struct bonding *bond = bond_dev->priv;
470 struct slave *slave;
471 struct net_device *vlan_dev;
472 int i, res;
473
474 bond_for_each_slave(bond, slave, i) {
475 struct net_device *slave_dev = slave->dev;
476
477 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
478 slave_dev->vlan_rx_kill_vid) {
479 /* Save and then restore vlan_dev in the grp array,
480 * since the slave's driver might clear it.
481 */
482 vlan_dev = bond->vlgrp->vlan_devices[vid];
483 slave_dev->vlan_rx_kill_vid(slave_dev, vid);
484 bond->vlgrp->vlan_devices[vid] = vlan_dev;
485 }
486 }
487
488 res = bond_del_vlan(bond, vid);
489 if (res) {
490 printk(KERN_ERR DRV_NAME
4e0952c7 491 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 492 bond_dev->name, vid);
493 }
494}
495
496static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
497{
498 struct vlan_entry *vlan;
499
500 write_lock_bh(&bond->lock);
501
502 if (list_empty(&bond->vlan_list)) {
503 goto out;
504 }
505
506 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
507 slave_dev->vlan_rx_register) {
508 slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
509 }
510
511 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
512 !(slave_dev->vlan_rx_add_vid)) {
513 goto out;
514 }
515
516 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
517 slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
518 }
519
520out:
521 write_unlock_bh(&bond->lock);
522}
523
524static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
525{
526 struct vlan_entry *vlan;
527 struct net_device *vlan_dev;
528
529 write_lock_bh(&bond->lock);
530
531 if (list_empty(&bond->vlan_list)) {
532 goto out;
533 }
534
535 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
536 !(slave_dev->vlan_rx_kill_vid)) {
537 goto unreg;
538 }
539
540 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
541 /* Save and then restore vlan_dev in the grp array,
542 * since the slave's driver might clear it.
543 */
544 vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
545 slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
546 bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev;
547 }
548
549unreg:
550 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
551 slave_dev->vlan_rx_register) {
552 slave_dev->vlan_rx_register(slave_dev, NULL);
553 }
554
555out:
556 write_unlock_bh(&bond->lock);
557}
558
559/*------------------------------- Link status -------------------------------*/
560
ff59c456
JV		 561/*
562 * Set the carrier state for the master according to the state of its
563 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
564 * do special 802.3ad magic.
565 *
566 * Returns zero if carrier state does not change, nonzero if it does.
567 */
568static int bond_set_carrier(struct bonding *bond)
569{
570 struct slave *slave;
571 int i;
572
573 if (bond->slave_cnt == 0)
574 goto down;
575
576 if (bond->params.mode == BOND_MODE_8023AD)
577 return bond_3ad_set_carrier(bond);
578
579 bond_for_each_slave(bond, slave, i) {
580 if (slave->link == BOND_LINK_UP) {
581 if (!netif_carrier_ok(bond->dev)) {
582 netif_carrier_on(bond->dev);
583 return 1;
584 }
585 return 0;
586 }
587 }
588
589down:
590 if (netif_carrier_ok(bond->dev)) {
591 netif_carrier_off(bond->dev);
592 return 1;
593 }
594 return 0;
595}
596
1da177e4
LT		 597/*
598 * Get link speed and duplex from the slave's base driver
599 * using ethtool. If for some reason the call fails or the
600 * values are invalid, fake speed and duplex to 100/Full
601 * and return error.
602 */
603static int bond_update_speed_duplex(struct slave *slave)
604{
605 struct net_device *slave_dev = slave->dev;
606 static int (* ioctl)(struct net_device *, struct ifreq *, int);
607 struct ifreq ifr;
608 struct ethtool_cmd etool;
609
610 /* Fake speed and duplex */
611 slave->speed = SPEED_100;
612 slave->duplex = DUPLEX_FULL;
613
614 if (slave_dev->ethtool_ops) {
6a986ce4 615 int res;
1da177e4
LT		 616
617 if (!slave_dev->ethtool_ops->get_settings) {
618 return -1;
619 }
620
621 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
622 if (res < 0) {
623 return -1;
624 }
625
626 goto verify;
627 }
628
629 ioctl = slave_dev->do_ioctl;
630 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
631 etool.cmd = ETHTOOL_GSET;
632 ifr.ifr_data = (char*)&etool;
633 if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) {
634 return -1;
635 }
636
637verify:
638 switch (etool.speed) {
639 case SPEED_10:
640 case SPEED_100:
641 case SPEED_1000:
642 break;
643 default:
644 return -1;
645 }
646
647 switch (etool.duplex) {
648 case DUPLEX_FULL:
649 case DUPLEX_HALF:
650 break;
651 default:
652 return -1;
653 }
654
655 slave->speed = etool.speed;
656 slave->duplex = etool.duplex;
657
658 return 0;
659}
660
661/*
662 * if <dev> supports MII link status reporting, check its link status.
663 *
664 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
665 * depening upon the setting of the use_carrier parameter.
666 *
667 * Return either BMSR_LSTATUS, meaning that the link is up (or we
668 * can't tell and just pretend it is), or 0, meaning that the link is
669 * down.
670 *
671 * If reporting is non-zero, instead of faking link up, return -1 if
672 * both ETHTOOL and MII ioctls fail (meaning the device does not
673 * support them). If use_carrier is set, return whatever it says.
674 * It'd be nice if there was a good way to tell if a driver supports
675 * netif_carrier, but there really isn't.
676 */
677static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
678{
679 static int (* ioctl)(struct net_device *, struct ifreq *, int);
680 struct ifreq ifr;
681 struct mii_ioctl_data *mii;
682 struct ethtool_value etool;
683
684 if (bond->params.use_carrier) {
685 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
686 }
687
688 ioctl = slave_dev->do_ioctl;
689 if (ioctl) {
690 /* TODO: set pointer to correct ioctl on a per team member */
691 /* bases to make this more efficient. that is, once */
692 /* we determine the correct ioctl, we will always */
693 /* call it and not the others for that team */
694 /* member. */
695
696 /*
697 * We cannot assume that SIOCGMIIPHY will also read a
698 * register; not all network drivers (e.g., e100)
699 * support that.
700 */
701
702 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
703 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
704 mii = if_mii(&ifr);
705 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
706 mii->reg_num = MII_BMSR;
707 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
708 return (mii->val_out & BMSR_LSTATUS);
709 }
710 }
711 }
712
713 /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */
714 /* for a period of time so we attempt to get link status */
715 /* from it last if the above MII ioctls fail... */
716 if (slave_dev->ethtool_ops) {
717 if (slave_dev->ethtool_ops->get_link) {
718 u32 link;
719
720 link = slave_dev->ethtool_ops->get_link(slave_dev);
721
722 return link ? BMSR_LSTATUS : 0;
723 }
724 }
725
726 if (ioctl) {
727 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
728 etool.cmd = ETHTOOL_GLINK;
729 ifr.ifr_data = (char*)&etool;
730 if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) {
731 if (etool.data == 1) {
732 return BMSR_LSTATUS;
733 } else {
734 dprintk("SIOCETHTOOL shows link down\n");
735 return 0;
736 }
737 }
738 }
739
740 /*
741 * If reporting, report that either there's no dev->do_ioctl,
742 * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we
743 * cannot report link status). If not reporting, pretend
744 * we're ok.
745 */
746 return (reporting ? -1 : BMSR_LSTATUS);
747}
748
749/*----------------------------- Multicast list ------------------------------*/
750
751/*
752 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
753 */
754static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
755{
756 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
757 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
758}
759
760/*
761 * returns dmi entry if found, NULL otherwise
762 */
763static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
764{
765 struct dev_mc_list *idmi;
766
767 for (idmi = mc_list; idmi; idmi = idmi->next) {
768 if (bond_is_dmi_same(dmi, idmi)) {
769 return idmi;
770 }
771 }
772
773 return NULL;
774}
775
776/*
777 * Push the promiscuity flag down to appropriate slaves
778 */
779static void bond_set_promiscuity(struct bonding *bond, int inc)
780{
781 if (USES_PRIMARY(bond->params.mode)) {
782 /* write lock already acquired */
783 if (bond->curr_active_slave) {
784 dev_set_promiscuity(bond->curr_active_slave->dev, inc);
785 }
786 } else {
787 struct slave *slave;
788 int i;
789 bond_for_each_slave(bond, slave, i) {
790 dev_set_promiscuity(slave->dev, inc);
791 }
792 }
793}
794
795/*
796 * Push the allmulti flag down to all slaves
797 */
798static void bond_set_allmulti(struct bonding *bond, int inc)
799{
800 if (USES_PRIMARY(bond->params.mode)) {
801 /* write lock already acquired */
802 if (bond->curr_active_slave) {
803 dev_set_allmulti(bond->curr_active_slave->dev, inc);
804 }
805 } else {
806 struct slave *slave;
807 int i;
808 bond_for_each_slave(bond, slave, i) {
809 dev_set_allmulti(slave->dev, inc);
810 }
811 }
812}
813
814/*
815 * Add a Multicast address to slaves
816 * according to mode
817 */
818static void bond_mc_add(struct bonding *bond, void *addr, int alen)
819{
820 if (USES_PRIMARY(bond->params.mode)) {
821 /* write lock already acquired */
822 if (bond->curr_active_slave) {
823 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
824 }
825 } else {
826 struct slave *slave;
827 int i;
828 bond_for_each_slave(bond, slave, i) {
829 dev_mc_add(slave->dev, addr, alen, 0);
830 }
831 }
832}
833
834/*
835 * Remove a multicast address from slave
836 * according to mode
837 */
838static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
839{
840 if (USES_PRIMARY(bond->params.mode)) {
841 /* write lock already acquired */
842 if (bond->curr_active_slave) {
843 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
844 }
845 } else {
846 struct slave *slave;
847 int i;
848 bond_for_each_slave(bond, slave, i) {
849 dev_mc_delete(slave->dev, addr, alen, 0);
850 }
851 }
852}
853
854/*
855 * Totally destroys the mc_list in bond
856 */
857static void bond_mc_list_destroy(struct bonding *bond)
858{
859 struct dev_mc_list *dmi;
860
861 dmi = bond->mc_list;
862 while (dmi) {
863 bond->mc_list = dmi->next;
864 kfree(dmi);
865 dmi = bond->mc_list;
866 }
867}
868
869/*
870 * Copy all the Multicast addresses from src to the bonding device dst
871 */
de54f390 872static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 873 gfp_t gfp_flag)
1da177e4
LT		 874{
875 struct dev_mc_list *dmi, *new_dmi;
876
877 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 878 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT		 879
880 if (!new_dmi) {
881 /* FIXME: Potential memory leak !!! */
882 return -ENOMEM;
883 }
884
885 new_dmi->next = bond->mc_list;
886 bond->mc_list = new_dmi;
887 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
888 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
889 new_dmi->dmi_users = dmi->dmi_users;
890 new_dmi->dmi_gusers = dmi->dmi_gusers;
891 }
892
893 return 0;
894}
895
896/*
897 * flush all members of flush->mc_list from device dev->mc_list
898 */
899static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
900{
901 struct bonding *bond = bond_dev->priv;
902 struct dev_mc_list *dmi;
903
904 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
905 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
906 }
907
908 if (bond->params.mode == BOND_MODE_8023AD) {
909 /* del lacpdu mc addr from mc list */
910 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
911
912 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
913 }
914}
915
916/*--------------------------- Active slave change ---------------------------*/
917
918/*
919 * Update the mc list and multicast-related flags for the new and
920 * old active slaves (if any) according to the multicast mode, and
921 * promiscuous flags unconditionally.
922 */
923static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
924{
925 struct dev_mc_list *dmi;
926
927 if (!USES_PRIMARY(bond->params.mode)) {
928 /* nothing to do - mc list is already up-to-date on
929 * all slaves
930 */
931 return;
932 }
933
934 if (old_active) {
935 if (bond->dev->flags & IFF_PROMISC) {
936 dev_set_promiscuity(old_active->dev, -1);
937 }
938
939 if (bond->dev->flags & IFF_ALLMULTI) {
940 dev_set_allmulti(old_active->dev, -1);
941 }
942
943 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
944 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
945 }
946 }
947
948 if (new_active) {
949 if (bond->dev->flags & IFF_PROMISC) {
950 dev_set_promiscuity(new_active->dev, 1);
951 }
952
953 if (bond->dev->flags & IFF_ALLMULTI) {
954 dev_set_allmulti(new_active->dev, 1);
955 }
956
957 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
958 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
959 }
960 }
961}
962
963/**
964 * find_best_interface - select the best available slave to be the active one
965 * @bond: our bonding struct
966 *
967 * Warning: Caller must hold curr_slave_lock for writing.
968 */
969static struct slave *bond_find_best_slave(struct bonding *bond)
970{
971 struct slave *new_active, *old_active;
972 struct slave *bestslave = NULL;
973 int mintime = bond->params.updelay;
974 int i;
975
976 new_active = old_active = bond->curr_active_slave;
977
978 if (!new_active) { /* there were no active slaves left */
979 if (bond->slave_cnt > 0) { /* found one slave */
980 new_active = bond->first_slave;
981 } else {
982 return NULL; /* still no slave, return NULL */
983 }
984 }
985
986 /* first try the primary link; if arping, a link must tx/rx traffic
987 * before it can be considered the curr_active_slave - also, we would skip
988 * slaves between the curr_active_slave and primary_slave that may be up
989 * and able to arp
990 */
991 if ((bond->primary_slave) &&
992 (!bond->params.arp_interval) &&
993 (IS_UP(bond->primary_slave->dev))) {
994 new_active = bond->primary_slave;
995 }
996
997 /* remember where to stop iterating over the slaves */
998 old_active = new_active;
999
1000 bond_for_each_slave_from(bond, new_active, i, old_active) {
1001 if (IS_UP(new_active->dev)) {
1002 if (new_active->link == BOND_LINK_UP) {
1003 return new_active;
1004 } else if (new_active->link == BOND_LINK_BACK) {
1005 /* link up, but waiting for stabilization */
1006 if (new_active->delay < mintime) {
1007 mintime = new_active->delay;
1008 bestslave = new_active;
1009 }
1010 }
1011 }
1012 }
1013
1014 return bestslave;
1015}
1016
1017/**
1018 * change_active_interface - change the active slave into the specified one
1019 * @bond: our bonding struct
1020 * @new: the new slave to make the active one
1021 *
1022 * Set the new slave to the bond's settings and unset them on the old
1023 * curr_active_slave.
1024 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1025 *
1026 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1027 * because it is apparently the best available slave we have, even though its
1028 * updelay hasn't timed out yet.
1029 *
1030 * Warning: Caller must hold curr_slave_lock for writing.
1031 */
a77b5325 1032void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1033{
1034 struct slave *old_active = bond->curr_active_slave;
1035
1036 if (old_active == new_active) {
1037 return;
1038 }
1039
1040 if (new_active) {
1041 if (new_active->link == BOND_LINK_BACK) {
1042 if (USES_PRIMARY(bond->params.mode)) {
1043 printk(KERN_INFO DRV_NAME
1044 ": %s: making interface %s the new "
1045 "active one %d ms earlier.\n",
1046 bond->dev->name, new_active->dev->name,
1047 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1048 }
1049
1050 new_active->delay = 0;
1051 new_active->link = BOND_LINK_UP;
1052 new_active->jiffies = jiffies;
1053
1054 if (bond->params.mode == BOND_MODE_8023AD) {
1055 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1056 }
1057
1058 if ((bond->params.mode == BOND_MODE_TLB) ||
1059 (bond->params.mode == BOND_MODE_ALB)) {
1060 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1061 }
1062 } else {
1063 if (USES_PRIMARY(bond->params.mode)) {
1064 printk(KERN_INFO DRV_NAME
1065 ": %s: making interface %s the new "
1066 "active one.\n",
1067 bond->dev->name, new_active->dev->name);
1068 }
1069 }
1070 }
1071
1da177e4
LT		 1072 if (USES_PRIMARY(bond->params.mode)) {
1073 bond_mc_swap(bond, new_active, old_active);
1074 }
1075
1076 if ((bond->params.mode == BOND_MODE_TLB) ||
1077 (bond->params.mode == BOND_MODE_ALB)) {
1078 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1079 if (old_active)
1080 bond_set_slave_inactive_flags(old_active);
1081 if (new_active)
1082 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1083 } else {
1084 bond->curr_active_slave = new_active;
1085 }
c3ade5ca
JV		 1086
1087 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1088 if (old_active) {
1089 bond_set_slave_inactive_flags(old_active);
1090 }
1091
1092 if (new_active) {
1093 bond_set_slave_active_flags(new_active);
1094 }
1095 bond_send_gratuitous_arp(bond);
1096 }
1da177e4
LT		 1097}
1098
1099/**
1100 * bond_select_active_slave - select a new active slave, if needed
1101 * @bond: our bonding struct
1102 *
1103 * This functions shoud be called when one of the following occurs:
1104 * - The old curr_active_slave has been released or lost its link.
1105 * - The primary_slave has got its link back.
1106 * - A slave has got its link back and there's no old curr_active_slave.
1107 *
1108 * Warning: Caller must hold curr_slave_lock for writing.
1109 */
a77b5325 1110void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1111{
1112 struct slave *best_slave;
ff59c456 1113 int rv;
1da177e4
LT		 1114
1115 best_slave = bond_find_best_slave(bond);
1116 if (best_slave != bond->curr_active_slave) {
1117 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1118 rv = bond_set_carrier(bond);
1119 if (!rv)
1120 return;
1121
1122 if (netif_carrier_ok(bond->dev)) {
1123 printk(KERN_INFO DRV_NAME
1124 ": %s: first active interface up!\n",
1125 bond->dev->name);
1126 } else {
1127 printk(KERN_INFO DRV_NAME ": %s: "
1128 "now running without any active interface !\n",
1129 bond->dev->name);
1130 }
1da177e4
LT		 1131 }
1132}
1133
1134/*--------------------------- slave list handling ---------------------------*/
1135
1136/*
1137 * This function attaches the slave to the end of list.
1138 *
1139 * bond->lock held for writing by caller.
1140 */
1141static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1142{
1143 if (bond->first_slave == NULL) { /* attaching the first slave */
1144 new_slave->next = new_slave;
1145 new_slave->prev = new_slave;
1146 bond->first_slave = new_slave;
1147 } else {
1148 new_slave->next = bond->first_slave;
1149 new_slave->prev = bond->first_slave->prev;
1150 new_slave->next->prev = new_slave;
1151 new_slave->prev->next = new_slave;
1152 }
1153
1154 bond->slave_cnt++;
1155}
1156
1157/*
1158 * This function detaches the slave from the list.
1159 * WARNING: no check is made to verify if the slave effectively
1160 * belongs to <bond>.
1161 * Nothing is freed on return, structures are just unchained.
1162 * If any slave pointer in bond was pointing to <slave>,
1163 * it should be changed by the calling function.
1164 *
1165 * bond->lock held for writing by caller.
1166 */
1167static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1168{
1169 if (slave->next) {
1170 slave->next->prev = slave->prev;
1171 }
1172
1173 if (slave->prev) {
1174 slave->prev->next = slave->next;
1175 }
1176
1177 if (bond->first_slave == slave) { /* slave is the first slave */
1178 if (bond->slave_cnt > 1) { /* there are more slave */
1179 bond->first_slave = slave->next;
1180 } else {
1181 bond->first_slave = NULL; /* slave was the last one */
1182 }
1183 }
1184
1185 slave->next = NULL;
1186 slave->prev = NULL;
1187 bond->slave_cnt--;
1188}
1189
1190/*---------------------------------- IOCTL ----------------------------------*/
1191
a77b5325 1192int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1193{
1194 dprintk("bond_dev=%p\n", bond_dev);
1195 dprintk("slave_dev=%p\n", slave_dev);
1196 dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1197 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1198 return 0;
1199}
1200
8531c5ff 1201#define BOND_INTERSECT_FEATURES \
a0de3adf
JV		 1202 (NETIF_F_SG|NETIF_F_IP_CSUM|NETIF_F_NO_CSUM|NETIF_F_HW_CSUM|\
1203 NETIF_F_TSO|NETIF_F_UFO)
8531c5ff
AK		 1204
1205/*
8e3babcd
JV		 1206 * Compute the common dev->feature set available to all slaves. Some
1207 * feature bits are managed elsewhere, so preserve feature bits set on
1208 * master device that are not part of the examined set.
8531c5ff
AK		 1209 */
1210static int bond_compute_features(struct bonding *bond)
1211{
8e3babcd 1212 unsigned long features = BOND_INTERSECT_FEATURES;
8531c5ff
AK		 1213 struct slave *slave;
1214 struct net_device *bond_dev = bond->dev;
8e3babcd 1215 int i;
8531c5ff 1216
8e3babcd
JV		 1217 bond_for_each_slave(bond, slave, i)
1218 features &= (slave->dev->features & BOND_INTERSECT_FEATURES);
8531c5ff 1219
8531c5ff 1220 if ((features & NETIF_F_SG) &&
8e3babcd
JV		 1221 !(features & (NETIF_F_IP_CSUM |
1222 NETIF_F_NO_CSUM |
1223 NETIF_F_HW_CSUM)))
8531c5ff 1224 features &= ~NETIF_F_SG;
8531c5ff 1225
a0de3adf
JV		 1226 /*
1227 * features will include NETIF_F_TSO (NETIF_F_UFO) iff all
1228 * slave devices support NETIF_F_TSO (NETIF_F_UFO), which
1229 * implies that all slaves also support scatter-gather
1230 * (NETIF_F_SG), which implies that features also includes
1231 * NETIF_F_SG. So no need to check whether we have an
1232 * illegal combination of NETIF_F_{TSO,UFO} and
1233 * !NETIF_F_SG
1234 */
1235
8e3babcd 1236 features |= (bond_dev->features & ~BOND_INTERSECT_FEATURES);
8531c5ff
AK		 1237 bond_dev->features = features;
1238
1239 return 0;
1240}
1241
1da177e4 1242/* enslave device <slave> to bond device <master> */
a77b5325 1243int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1244{
1245 struct bonding *bond = bond_dev->priv;
1246 struct slave *new_slave = NULL;
1247 struct dev_mc_list *dmi;
1248 struct sockaddr addr;
1249 int link_reporting;
1250 int old_features = bond_dev->features;
1251 int res = 0;
1252
552709d5 1253 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1254 slave_dev->do_ioctl == NULL) {
1da177e4 1255 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1256 ": %s: Warning: no link monitoring support for %s\n",
1257 bond_dev->name, slave_dev->name);
1da177e4
LT		 1258 }
1259
1260 /* bond must be initialized by bond_open() before enslaving */
1261 if (!(bond_dev->flags & IFF_UP)) {
1262 dprintk("Error, master_dev is not up\n");
1263 return -EPERM;
1264 }
1265
1266 /* already enslaved */
1267 if (slave_dev->flags & IFF_SLAVE) {
1268 dprintk("Error, Device was already enslaved\n");
1269 return -EBUSY;
1270 }
1271
1272 /* vlan challenged mutual exclusion */
1273 /* no need to lock since we're protected by rtnl_lock */
1274 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1275 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1276 if (!list_empty(&bond->vlan_list)) {
1277 printk(KERN_ERR DRV_NAME
4e0952c7 1278 ": %s: Error: cannot enslave VLAN "
1da177e4 1279 "challenged slave %s on VLAN enabled "
4e0952c7 1280 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1281 bond_dev->name);
1282 return -EPERM;
1283 } else {
1284 printk(KERN_WARNING DRV_NAME
4e0952c7 1285 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1286 "slave %s. Adding VLANs will be blocked as "
1287 "long as %s is part of bond %s\n",
4e0952c7 1288 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1289 bond_dev->name);
1290 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1291 }
1292 } else {
1293 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1294 if (bond->slave_cnt == 0) {
1295 /* First slave, and it is not VLAN challenged,
1296 * so remove the block of adding VLANs over the bond.
1297 */
1298 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1299 }
1300 }
1301
217df670
JV		 1302 /*
1303 * Old ifenslave binaries are no longer supported. These can
1304 * be identified with moderate accurary by the state of the slave:
1305 * the current ifenslave will set the interface down prior to
1306 * enslaving it; the old ifenslave will not.
1307 */
1308 if ((slave_dev->flags & IFF_UP)) {
1309 printk(KERN_ERR DRV_NAME ": %s is up. "
1310 "This may be due to an out of date ifenslave.\n",
1311 slave_dev->name);
1312 res = -EPERM;
1313 goto err_undo_flags;
1314 }
1da177e4 1315
217df670
JV		 1316 if (slave_dev->set_mac_address == NULL) {
1317 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 1318 ": %s: Error: The slave device you specified does "
1319 "not support setting the MAC address. "
1320 "Your kernel likely does not support slave "
1321 "devices.\n", bond_dev->name);
1322 res = -EOPNOTSUPP;
217df670 1323 goto err_undo_flags;
1da177e4
LT		 1324 }
1325
1326 new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL);
1327 if (!new_slave) {
1328 res = -ENOMEM;
1329 goto err_undo_flags;
1330 }
1331
1332 memset(new_slave, 0, sizeof(struct slave));
1333
1334 /* save slave's original flags before calling
1335 * netdev_set_master and dev_open
1336 */
1337 new_slave->original_flags = slave_dev->flags;
1338
217df670
JV		 1339 /*
1340 * Save slave's original ("permanent") mac address for modes
1341 * that need it, and for restoring it upon release, and then
1342 * set it to the master's address
1343 */
1344 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1345
217df670
JV		 1346 /*
1347 * Set slave to master's mac address. The application already
1348 * set the master's mac address to that of the first slave
1349 */
1350 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1351 addr.sa_family = slave_dev->type;
1352 res = dev_set_mac_address(slave_dev, &addr);
1353 if (res) {
1354 dprintk("Error %d calling set_mac_address\n", res);
1355 goto err_free;
1356 }
1da177e4 1357
217df670
JV		 1358 /* open the slave since the application closed it */
1359 res = dev_open(slave_dev);
1360 if (res) {
1361 dprintk("Openning slave %s failed\n", slave_dev->name);
1362 goto err_restore_mac;
1da177e4
LT		 1363 }
1364
1365 res = netdev_set_master(slave_dev, bond_dev);
1366 if (res) {
1367 dprintk("Error %d calling netdev_set_master\n", res);
217df670 1368 goto err_close;
1da177e4
LT		 1369 }
1370
1371 new_slave->dev = slave_dev;
1372
1373 if ((bond->params.mode == BOND_MODE_TLB) ||
1374 (bond->params.mode == BOND_MODE_ALB)) {
1375 /* bond_alb_init_slave() must be called before all other stages since
1376 * it might fail and we do not want to have to undo everything
1377 */
1378 res = bond_alb_init_slave(bond, new_slave);
1379 if (res) {
1380 goto err_unset_master;
1381 }
1382 }
1383
1384 /* If the mode USES_PRIMARY, then the new slave gets the
1385 * master's promisc (and mc) settings only if it becomes the
1386 * curr_active_slave, and that is taken care of later when calling
1387 * bond_change_active()
1388 */
1389 if (!USES_PRIMARY(bond->params.mode)) {
1390 /* set promiscuity level to new slave */
1391 if (bond_dev->flags & IFF_PROMISC) {
1392 dev_set_promiscuity(slave_dev, 1);
1393 }
1394
1395 /* set allmulti level to new slave */
1396 if (bond_dev->flags & IFF_ALLMULTI) {
1397 dev_set_allmulti(slave_dev, 1);
1398 }
1399
1400 /* upload master's mc_list to new slave */
1401 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1402 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1403 }
1404 }
1405
1406 if (bond->params.mode == BOND_MODE_8023AD) {
1407 /* add lacpdu mc addr to mc list */
1408 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1409
1410 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1411 }
1412
1413 bond_add_vlans_on_slave(bond, slave_dev);
1414
1415 write_lock_bh(&bond->lock);
1416
1417 bond_attach_slave(bond, new_slave);
1418
1419 new_slave->delay = 0;
1420 new_slave->link_failure_count = 0;
1421
8531c5ff
AK		 1422 bond_compute_features(bond);
1423
1da177e4
LT		 1424 if (bond->params.miimon && !bond->params.use_carrier) {
1425 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1426
1427 if ((link_reporting == -1) && !bond->params.arp_interval) {
1428 /*
1429 * miimon is set but a bonded network driver
1430 * does not support ETHTOOL/MII and
1431 * arp_interval is not set. Note: if
1432 * use_carrier is enabled, we will never go
1433 * here (because netif_carrier is always
1434 * supported); thus, we don't need to change
1435 * the messages for netif_carrier.
1436 */
1437 printk(KERN_WARNING DRV_NAME
4e0952c7 1438 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1439 "available for interface %s, and "
1440 "arp_interval/arp_ip_target module parameters "
1441 "not specified, thus bonding will not detect "
1442 "link failures! see bonding.txt for details.\n",
4e0952c7 1443 bond_dev->name, slave_dev->name);
1da177e4
LT		 1444 } else if (link_reporting == -1) {
1445 /* unable get link status using mii/ethtool */
1446 printk(KERN_WARNING DRV_NAME
4e0952c7 1447 ": %s: Warning: can't get link status from "
1da177e4
LT		 1448 "interface %s; the network driver associated "
1449 "with this interface does not support MII or "
1450 "ETHTOOL link status reporting, thus miimon "
1451 "has no effect on this interface.\n",
4e0952c7 1452 bond_dev->name, slave_dev->name);
1da177e4
LT		 1453 }
1454 }
1455
1456 /* check for initial state */
1457 if (!bond->params.miimon ||
1458 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1459 if (bond->params.updelay) {
1460 dprintk("Initial state of slave_dev is "
1461 "BOND_LINK_BACK\n");
1462 new_slave->link = BOND_LINK_BACK;
1463 new_slave->delay = bond->params.updelay;
1464 } else {
1465 dprintk("Initial state of slave_dev is "
1466 "BOND_LINK_UP\n");
1467 new_slave->link = BOND_LINK_UP;
1468 }
1469 new_slave->jiffies = jiffies;
1470 } else {
1471 dprintk("Initial state of slave_dev is "
1472 "BOND_LINK_DOWN\n");
1473 new_slave->link = BOND_LINK_DOWN;
1474 }
1475
1476 if (bond_update_speed_duplex(new_slave) &&
1477 (new_slave->link != BOND_LINK_DOWN)) {
1478 printk(KERN_WARNING DRV_NAME
4e0952c7 1479 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1480 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1481 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1482
1483 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1484 printk(KERN_WARNING DRV_NAME
1485 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1486 "support in base driver for proper aggregator "
4e0952c7 1487 "selection.\n", bond_dev->name);
1da177e4
LT		 1488 }
1489 }
1490
1491 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1492 /* if there is a primary slave, remember it */
1493 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1494 bond->primary_slave = new_slave;
1495 }
1496 }
1497
1498 switch (bond->params.mode) {
1499 case BOND_MODE_ACTIVEBACKUP:
8f903c70
JV		 1500 /* if we're in active-backup mode, we need one and
1501 * only one active interface. The backup interfaces
1502 * will have their SLAVE_INACTIVE flag set because we
1503 * need them to be drop all packets. Thus, since we
1504 * guarantee that curr_active_slave always point to
1505 * the last usable interface, we just have to verify
1506 * this interface's flag.
1da177e4
LT		 1507 */
1508 if (((!bond->curr_active_slave) ||
8f903c70 1509 (bond->curr_active_slave->dev->priv_flags & IFF_SLAVE_INACTIVE)) &&
1da177e4 1510 (new_slave->link != BOND_LINK_DOWN)) {
1da177e4
LT		 1511 /* first slave or no active slave yet, and this link
1512 is OK, so make this interface the active one */
1513 bond_change_active_slave(bond, new_slave);
ff59c456
JV		 1514 printk(KERN_INFO DRV_NAME
1515 ": %s: first active interface up!\n",
1516 bond->dev->name);
1517 netif_carrier_on(bond->dev);
1518
1da177e4
LT		 1519 } else {
1520 dprintk("This is just a backup slave\n");
1521 bond_set_slave_inactive_flags(new_slave);
1522 }
1523 break;
1524 case BOND_MODE_8023AD:
1525 /* in 802.3ad mode, the internal mechanism
1526 * will activate the slaves in the selected
1527 * aggregator
1528 */
1529 bond_set_slave_inactive_flags(new_slave);
1530 /* if this is the first slave */
1531 if (bond->slave_cnt == 1) {
1532 SLAVE_AD_INFO(new_slave).id = 1;
1533 /* Initialize AD with the number of times that the AD timer is called in 1 second
1534 * can be called only after the mac address of the bond is set
1535 */
1536 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1537 bond->params.lacp_fast);
1538 } else {
1539 SLAVE_AD_INFO(new_slave).id =
1540 SLAVE_AD_INFO(new_slave->prev).id + 1;
1541 }
1542
1543 bond_3ad_bind_slave(new_slave);
1544 break;
1545 case BOND_MODE_TLB:
1546 case BOND_MODE_ALB:
1547 new_slave->state = BOND_STATE_ACTIVE;
1548 if ((!bond->curr_active_slave) &&
1549 (new_slave->link != BOND_LINK_DOWN)) {
1550 /* first slave or no active slave yet, and this link
1551 * is OK, so make this interface the active one
1552 */
1553 bond_change_active_slave(bond, new_slave);
8f903c70
JV		 1554 } else {
1555 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1556 }
1557 break;
1558 default:
1559 dprintk("This slave is always active in trunk mode\n");
1560
1561 /* always active in trunk mode */
1562 new_slave->state = BOND_STATE_ACTIVE;
1563
1564 /* In trunking mode there is little meaning to curr_active_slave
1565 * anyway (it holds no special properties of the bond device),
1566 * so we can change it without calling change_active_interface()
1567 */
1568 if (!bond->curr_active_slave) {
1569 bond->curr_active_slave = new_slave;
1570 }
1571 break;
1572 } /* switch(bond_mode) */
1573
ff59c456
JV		 1574 bond_set_carrier(bond);
1575
1da177e4
LT		 1576 write_unlock_bh(&bond->lock);
1577
b76cdba9
MW		 1578 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1579 if (res)
1580 goto err_unset_master;
1581
1da177e4
LT		 1582 printk(KERN_INFO DRV_NAME
1583 ": %s: enslaving %s as a%s interface with a%s link.\n",
1584 bond_dev->name, slave_dev->name,
1585 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1586 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1587
1588 /* enslave is successful */
1589 return 0;
1590
1591/* Undo stages on error */
1592err_unset_master:
1593 netdev_set_master(slave_dev, NULL);
1594
1595err_close:
1596 dev_close(slave_dev);
1597
1598err_restore_mac:
1599 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1600 addr.sa_family = slave_dev->type;
1601 dev_set_mac_address(slave_dev, &addr);
1602
1603err_free:
1604 kfree(new_slave);
1605
1606err_undo_flags:
1607 bond_dev->features = old_features;
8531c5ff 1608
1da177e4
LT		 1609 return res;
1610}
1611
1612/*
1613 * Try to release the slave device <slave> from the bond device <master>
1614 * It is legal to access curr_active_slave without a lock because all the function
1615 * is write-locked.
1616 *
1617 * The rules for slave state should be:
1618 * for Active/Backup:
1619 * Active stays on all backups go down
1620 * for Bonded connections:
1621 * The first up interface should be left on and all others downed.
1622 */
a77b5325 1623int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1624{
1625 struct bonding *bond = bond_dev->priv;
1626 struct slave *slave, *oldcurrent;
1627 struct sockaddr addr;
1628 int mac_addr_differ;
1629
1630 /* slave is not a slave or master is not master of this slave */
1631 if (!(slave_dev->flags & IFF_SLAVE) ||
1632 (slave_dev->master != bond_dev)) {
1633 printk(KERN_ERR DRV_NAME
4e0952c7 1634 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1635 bond_dev->name, slave_dev->name);
1636 return -EINVAL;
1637 }
1638
1639 write_lock_bh(&bond->lock);
1640
1641 slave = bond_get_slave_by_dev(bond, slave_dev);
1642 if (!slave) {
1643 /* not a slave of this bond */
1644 printk(KERN_INFO DRV_NAME
1645 ": %s: %s not enslaved\n",
1646 bond_dev->name, slave_dev->name);
f5e2a7b2 1647 write_unlock_bh(&bond->lock);
1da177e4
LT		 1648 return -EINVAL;
1649 }
1650
1651 mac_addr_differ = memcmp(bond_dev->dev_addr,
1652 slave->perm_hwaddr,
1653 ETH_ALEN);
1654 if (!mac_addr_differ && (bond->slave_cnt > 1)) {
1655 printk(KERN_WARNING DRV_NAME
4e0952c7 1656 ": %s: Warning: the permanent HWaddr of %s "
1da177e4
LT		 1657 "- %02X:%02X:%02X:%02X:%02X:%02X - is "
1658 "still in use by %s. Set the HWaddr of "
1659 "%s to a different address to avoid "
1660 "conflicts.\n",
4e0952c7 1661 bond_dev->name,
1da177e4
LT		 1662 slave_dev->name,
1663 slave->perm_hwaddr[0],
1664 slave->perm_hwaddr[1],
1665 slave->perm_hwaddr[2],
1666 slave->perm_hwaddr[3],
1667 slave->perm_hwaddr[4],
1668 slave->perm_hwaddr[5],
1669 bond_dev->name,
1670 slave_dev->name);
1671 }
1672
1673 /* Inform AD package of unbinding of slave. */
1674 if (bond->params.mode == BOND_MODE_8023AD) {
1675 /* must be called before the slave is
1676 * detached from the list
1677 */
1678 bond_3ad_unbind_slave(slave);
1679 }
1680
1681 printk(KERN_INFO DRV_NAME
1682 ": %s: releasing %s interface %s\n",
1683 bond_dev->name,
1684 (slave->state == BOND_STATE_ACTIVE)
1685 ? "active" : "backup",
1686 slave_dev->name);
1687
1688 oldcurrent = bond->curr_active_slave;
1689
1690 bond->current_arp_slave = NULL;
1691
1692 /* release the slave from its bond */
1693 bond_detach_slave(bond, slave);
1694
8531c5ff
AK		 1695 bond_compute_features(bond);
1696
1da177e4
LT		 1697 if (bond->primary_slave == slave) {
1698 bond->primary_slave = NULL;
1699 }
1700
1701 if (oldcurrent == slave) {
1702 bond_change_active_slave(bond, NULL);
1703 }
1704
1705 if ((bond->params.mode == BOND_MODE_TLB) ||
1706 (bond->params.mode == BOND_MODE_ALB)) {
1707 /* Must be called only after the slave has been
1708 * detached from the list and the curr_active_slave
1709 * has been cleared (if our_slave == old_current),
1710 * but before a new active slave is selected.
1711 */
1712 bond_alb_deinit_slave(bond, slave);
1713 }
1714
ff59c456 1715 if (oldcurrent == slave)
1da177e4
LT		 1716 bond_select_active_slave(bond);
1717
1da177e4 1718 if (bond->slave_cnt == 0) {
ff59c456
JV		 1719 bond_set_carrier(bond);
1720
1da177e4
LT		 1721 /* if the last slave was removed, zero the mac address
1722 * of the master so it will be set by the application
1723 * to the mac address of the first slave
1724 */
1725 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1726
1727 if (list_empty(&bond->vlan_list)) {
1728 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1729 } else {
1730 printk(KERN_WARNING DRV_NAME
4e0952c7 1731 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1732 "still has VLANs.\n",
4e0952c7 1733 bond_dev->name, bond_dev->name);
1da177e4 1734 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1735 ": %s: When re-adding slaves, make sure the bond's "
1736 "HW address matches its VLANs'.\n",
1737 bond_dev->name);
1da177e4
LT		 1738 }
1739 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1740 !bond_has_challenged_slaves(bond)) {
1741 printk(KERN_INFO DRV_NAME
4e0952c7 1742 ": %s: last VLAN challenged slave %s "
1da177e4 1743 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1744 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1745 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1746 }
1747
1748 write_unlock_bh(&bond->lock);
1749
b76cdba9
MW		 1750 /* must do this from outside any spinlocks */
1751 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1752
1da177e4
LT		 1753 bond_del_vlans_from_slave(bond, slave_dev);
1754
1755 /* If the mode USES_PRIMARY, then we should only remove its
1756 * promisc and mc settings if it was the curr_active_slave, but that was
1757 * already taken care of above when we detached the slave
1758 */
1759 if (!USES_PRIMARY(bond->params.mode)) {
1760 /* unset promiscuity level from slave */
1761 if (bond_dev->flags & IFF_PROMISC) {
1762 dev_set_promiscuity(slave_dev, -1);
1763 }
1764
1765 /* unset allmulti level from slave */
1766 if (bond_dev->flags & IFF_ALLMULTI) {
1767 dev_set_allmulti(slave_dev, -1);
1768 }
1769
1770 /* flush master's mc_list from slave */
1771 bond_mc_list_flush(bond_dev, slave_dev);
1772 }
1773
1774 netdev_set_master(slave_dev, NULL);
1775
1776 /* close slave before restoring its mac address */
1777 dev_close(slave_dev);
1778
217df670
JV		 1779 /* restore original ("permanent") mac address */
1780 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1781 addr.sa_family = slave_dev->type;
1782 dev_set_mac_address(slave_dev, &addr);
1da177e4 1783
8f903c70
JV		 1784 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1785 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1786
1787 kfree(slave);
1788
1789 return 0; /* deletion OK */
1790}
1791
1792/*
1793 * This function releases all slaves.
1794 */
1795static int bond_release_all(struct net_device *bond_dev)
1796{
1797 struct bonding *bond = bond_dev->priv;
1798 struct slave *slave;
1799 struct net_device *slave_dev;
1800 struct sockaddr addr;
1801
1802 write_lock_bh(&bond->lock);
1803
ff59c456
JV		 1804 netif_carrier_off(bond_dev);
1805
1da177e4
LT		 1806 if (bond->slave_cnt == 0) {
1807 goto out;
1808 }
1809
1810 bond->current_arp_slave = NULL;
1811 bond->primary_slave = NULL;
1812 bond_change_active_slave(bond, NULL);
1813
1814 while ((slave = bond->first_slave) != NULL) {
1815 /* Inform AD package of unbinding of slave
1816 * before slave is detached from the list.
1817 */
1818 if (bond->params.mode == BOND_MODE_8023AD) {
1819 bond_3ad_unbind_slave(slave);
1820 }
1821
1822 slave_dev = slave->dev;
1823 bond_detach_slave(bond, slave);
1824
1825 if ((bond->params.mode == BOND_MODE_TLB) ||
1826 (bond->params.mode == BOND_MODE_ALB)) {
1827 /* must be called only after the slave
1828 * has been detached from the list
1829 */
1830 bond_alb_deinit_slave(bond, slave);
1831 }
1832
8531c5ff
AK		 1833 bond_compute_features(bond);
1834
1da177e4
LT		 1835 /* now that the slave is detached, unlock and perform
1836 * all the undo steps that should not be called from
1837 * within a lock.
1838 */
1839 write_unlock_bh(&bond->lock);
1840
b76cdba9 1841 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 1842 bond_del_vlans_from_slave(bond, slave_dev);
1843
1844 /* If the mode USES_PRIMARY, then we should only remove its
1845 * promisc and mc settings if it was the curr_active_slave, but that was
1846 * already taken care of above when we detached the slave
1847 */
1848 if (!USES_PRIMARY(bond->params.mode)) {
1849 /* unset promiscuity level from slave */
1850 if (bond_dev->flags & IFF_PROMISC) {
1851 dev_set_promiscuity(slave_dev, -1);
1852 }
1853
1854 /* unset allmulti level from slave */
1855 if (bond_dev->flags & IFF_ALLMULTI) {
1856 dev_set_allmulti(slave_dev, -1);
1857 }
1858
1859 /* flush master's mc_list from slave */
1860 bond_mc_list_flush(bond_dev, slave_dev);
1861 }
1862
1863 netdev_set_master(slave_dev, NULL);
1864
1865 /* close slave before restoring its mac address */
1866 dev_close(slave_dev);
1867
217df670
JV		 1868 /* restore original ("permanent") mac address*/
1869 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1870 addr.sa_family = slave_dev->type;
1871 dev_set_mac_address(slave_dev, &addr);
1da177e4 1872
8f903c70
JV		 1873 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1874 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1875
1876 kfree(slave);
1877
1878 /* re-acquire the lock before getting the next slave */
1879 write_lock_bh(&bond->lock);
1880 }
1881
1882 /* zero the mac address of the master so it will be
1883 * set by the application to the mac address of the
1884 * first slave
1885 */
1886 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1887
1888 if (list_empty(&bond->vlan_list)) {
1889 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1890 } else {
1891 printk(KERN_WARNING DRV_NAME
4e0952c7 1892 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1893 "still has VLANs.\n",
4e0952c7 1894 bond_dev->name, bond_dev->name);
1da177e4 1895 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1896 ": %s: When re-adding slaves, make sure the bond's "
1897 "HW address matches its VLANs'.\n",
1898 bond_dev->name);
1da177e4
LT		 1899 }
1900
1901 printk(KERN_INFO DRV_NAME
1902 ": %s: released all slaves\n",
1903 bond_dev->name);
1904
1905out:
1906 write_unlock_bh(&bond->lock);
1907
1908 return 0;
1909}
1910
1911/*
1912 * This function changes the active slave to slave <slave_dev>.
1913 * It returns -EINVAL in the following cases.
1914 * - <slave_dev> is not found in the list.
1915 * - There is not active slave now.
1916 * - <slave_dev> is already active.
1917 * - The link state of <slave_dev> is not BOND_LINK_UP.
1918 * - <slave_dev> is not running.
1919 * In these cases, this fuction does nothing.
1920 * In the other cases, currnt_slave pointer is changed and 0 is returned.
1921 */
1922static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
1923{
1924 struct bonding *bond = bond_dev->priv;
1925 struct slave *old_active = NULL;
1926 struct slave *new_active = NULL;
1927 int res = 0;
1928
1929 if (!USES_PRIMARY(bond->params.mode)) {
1930 return -EINVAL;
1931 }
1932
1933 /* Verify that master_dev is indeed the master of slave_dev */
1934 if (!(slave_dev->flags & IFF_SLAVE) ||
1935 (slave_dev->master != bond_dev)) {
1936 return -EINVAL;
1937 }
1938
1939 write_lock_bh(&bond->lock);
1940
1941 old_active = bond->curr_active_slave;
1942 new_active = bond_get_slave_by_dev(bond, slave_dev);
1943
1944 /*
1945 * Changing to the current active: do nothing; return success.
1946 */
1947 if (new_active && (new_active == old_active)) {
1948 write_unlock_bh(&bond->lock);
1949 return 0;
1950 }
1951
1952 if ((new_active) &&
1953 (old_active) &&
1954 (new_active->link == BOND_LINK_UP) &&
1955 IS_UP(new_active->dev)) {
1956 bond_change_active_slave(bond, new_active);
1957 } else {
1958 res = -EINVAL;
1959 }
1960
1961 write_unlock_bh(&bond->lock);
1962
1963 return res;
1964}
1965
1da177e4
LT		 1966static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
1967{
1968 struct bonding *bond = bond_dev->priv;
1969
1970 info->bond_mode = bond->params.mode;
1971 info->miimon = bond->params.miimon;
1972
1973 read_lock_bh(&bond->lock);
1974 info->num_slaves = bond->slave_cnt;
1975 read_unlock_bh(&bond->lock);
1976
1977 return 0;
1978}
1979
1980static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
1981{
1982 struct bonding *bond = bond_dev->priv;
1983 struct slave *slave;
1984 int i, found = 0;
1985
1986 if (info->slave_id < 0) {
1987 return -ENODEV;
1988 }
1989
1990 read_lock_bh(&bond->lock);
1991
1992 bond_for_each_slave(bond, slave, i) {
1993 if (i == (int)info->slave_id) {
1994 found = 1;
1995 break;
1996 }
1997 }
1998
1999 read_unlock_bh(&bond->lock);
2000
2001 if (found) {
2002 strcpy(info->slave_name, slave->dev->name);
2003 info->link = slave->link;
2004 info->state = slave->state;
2005 info->link_failure_count = slave->link_failure_count;
2006 } else {
2007 return -ENODEV;
2008 }
2009
2010 return 0;
2011}
2012
2013/*-------------------------------- Monitoring -------------------------------*/
2014
2015/* this function is called regularly to monitor each slave's link. */
a77b5325 2016void bond_mii_monitor(struct net_device *bond_dev)
1da177e4
LT		 2017{
2018 struct bonding *bond = bond_dev->priv;
2019 struct slave *slave, *oldcurrent;
2020 int do_failover = 0;
2021 int delta_in_ticks;
2022 int i;
2023
2024 read_lock(&bond->lock);
2025
2026 delta_in_ticks = (bond->params.miimon * HZ) / 1000;
2027
2028 if (bond->kill_timers) {
2029 goto out;
2030 }
2031
2032 if (bond->slave_cnt == 0) {
2033 goto re_arm;
2034 }
2035
2036 /* we will try to read the link status of each of our slaves, and
2037 * set their IFF_RUNNING flag appropriately. For each slave not
2038 * supporting MII status, we won't do anything so that a user-space
2039 * program could monitor the link itself if needed.
2040 */
2041
2042 read_lock(&bond->curr_slave_lock);
2043 oldcurrent = bond->curr_active_slave;
2044 read_unlock(&bond->curr_slave_lock);
2045
2046 bond_for_each_slave(bond, slave, i) {
2047 struct net_device *slave_dev = slave->dev;
2048 int link_state;
2049 u16 old_speed = slave->speed;
2050 u8 old_duplex = slave->duplex;
2051
2052 link_state = bond_check_dev_link(bond, slave_dev, 0);
2053
2054 switch (slave->link) {
2055 case BOND_LINK_UP: /* the link was up */
2056 if (link_state == BMSR_LSTATUS) {
2057 /* link stays up, nothing more to do */
2058 break;
2059 } else { /* link going down */
2060 slave->link = BOND_LINK_FAIL;
2061 slave->delay = bond->params.downdelay;
2062
2063 if (slave->link_failure_count < UINT_MAX) {
2064 slave->link_failure_count++;
2065 }
2066
2067 if (bond->params.downdelay) {
2068 printk(KERN_INFO DRV_NAME
2069 ": %s: link status down for %s "
2070 "interface %s, disabling it in "
2071 "%d ms.\n",
2072 bond_dev->name,
2073 IS_UP(slave_dev)
2074 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2075 ? ((slave == oldcurrent)
2076 ? "active " : "backup ")
2077 : "")
2078 : "idle ",
2079 slave_dev->name,
2080 bond->params.downdelay * bond->params.miimon);
2081 }
2082 }
2083 /* no break ! fall through the BOND_LINK_FAIL test to
2084 ensure proper action to be taken
2085 */
2086 case BOND_LINK_FAIL: /* the link has just gone down */
2087 if (link_state != BMSR_LSTATUS) {
2088 /* link stays down */
2089 if (slave->delay <= 0) {
2090 /* link down for too long time */
2091 slave->link = BOND_LINK_DOWN;
2092
2093 /* in active/backup mode, we must
2094 * completely disable this interface
2095 */
2096 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2097 (bond->params.mode == BOND_MODE_8023AD)) {
2098 bond_set_slave_inactive_flags(slave);
2099 }
2100
2101 printk(KERN_INFO DRV_NAME
2102 ": %s: link status definitely "
2103 "down for interface %s, "
2104 "disabling it\n",
2105 bond_dev->name,
2106 slave_dev->name);
2107
2108 /* notify ad that the link status has changed */
2109 if (bond->params.mode == BOND_MODE_8023AD) {
2110 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2111 }
2112
2113 if ((bond->params.mode == BOND_MODE_TLB) ||
2114 (bond->params.mode == BOND_MODE_ALB)) {
2115 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2116 }
2117
2118 if (slave == oldcurrent) {
2119 do_failover = 1;
2120 }
2121 } else {
2122 slave->delay--;
2123 }
2124 } else {
2125 /* link up again */
2126 slave->link = BOND_LINK_UP;
2127 slave->jiffies = jiffies;
2128 printk(KERN_INFO DRV_NAME
2129 ": %s: link status up again after %d "
2130 "ms for interface %s.\n",
2131 bond_dev->name,
2132 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2133 slave_dev->name);
2134 }
2135 break;
2136 case BOND_LINK_DOWN: /* the link was down */
2137 if (link_state != BMSR_LSTATUS) {
2138 /* the link stays down, nothing more to do */
2139 break;
2140 } else { /* link going up */
2141 slave->link = BOND_LINK_BACK;
2142 slave->delay = bond->params.updelay;
2143
2144 if (bond->params.updelay) {
2145 /* if updelay == 0, no need to
2146 advertise about a 0 ms delay */
2147 printk(KERN_INFO DRV_NAME
2148 ": %s: link status up for "
2149 "interface %s, enabling it "
2150 "in %d ms.\n",
2151 bond_dev->name,
2152 slave_dev->name,
2153 bond->params.updelay * bond->params.miimon);
2154 }
2155 }
2156 /* no break ! fall through the BOND_LINK_BACK state in
2157 case there's something to do.
2158 */
2159 case BOND_LINK_BACK: /* the link has just come back */
2160 if (link_state != BMSR_LSTATUS) {
2161 /* link down again */
2162 slave->link = BOND_LINK_DOWN;
2163
2164 printk(KERN_INFO DRV_NAME
2165 ": %s: link status down again after %d "
2166 "ms for interface %s.\n",
2167 bond_dev->name,
2168 (bond->params.updelay - slave->delay) * bond->params.miimon,
2169 slave_dev->name);
2170 } else {
2171 /* link stays up */
2172 if (slave->delay == 0) {
2173 /* now the link has been up for long time enough */
2174 slave->link = BOND_LINK_UP;
2175 slave->jiffies = jiffies;
2176
2177 if (bond->params.mode == BOND_MODE_8023AD) {
2178 /* prevent it from being the active one */
2179 slave->state = BOND_STATE_BACKUP;
2180 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2181 /* make it immediately active */
2182 slave->state = BOND_STATE_ACTIVE;
2183 } else if (slave != bond->primary_slave) {
2184 /* prevent it from being the active one */
2185 slave->state = BOND_STATE_BACKUP;
2186 }
2187
2188 printk(KERN_INFO DRV_NAME
2189 ": %s: link status definitely "
2190 "up for interface %s.\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_UP);
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_UP);
2202 }
2203
2204 if ((!oldcurrent) ||
2205 (slave == bond->primary_slave)) {
2206 do_failover = 1;
2207 }
2208 } else {
2209 slave->delay--;
2210 }
2211 }
2212 break;
2213 default:
2214 /* Should not happen */
4e0952c7
MW		 2215 printk(KERN_ERR DRV_NAME
2216 ": %s: Error: %s Illegal value (link=%d)\n",
2217 bond_dev->name,
2218 slave->dev->name,
2219 slave->link);
1da177e4
LT		 2220 goto out;
2221 } /* end of switch (slave->link) */
2222
2223 bond_update_speed_duplex(slave);
2224
2225 if (bond->params.mode == BOND_MODE_8023AD) {
2226 if (old_speed != slave->speed) {
2227 bond_3ad_adapter_speed_changed(slave);
2228 }
2229
2230 if (old_duplex != slave->duplex) {
2231 bond_3ad_adapter_duplex_changed(slave);
2232 }
2233 }
2234
2235 } /* end of for */
2236
2237 if (do_failover) {
2238 write_lock(&bond->curr_slave_lock);
2239
2240 bond_select_active_slave(bond);
2241
1da177e4 2242 write_unlock(&bond->curr_slave_lock);
ff59c456
JV		 2243 } else
2244 bond_set_carrier(bond);
1da177e4
LT		 2245
2246re_arm:
2247 if (bond->params.miimon) {
2248 mod_timer(&bond->mii_timer, jiffies + delta_in_ticks);
2249 }
2250out:
2251 read_unlock(&bond->lock);
2252}
2253
c3ade5ca
JV		 2254
2255static u32 bond_glean_dev_ip(struct net_device *dev)
2256{
2257 struct in_device *idev;
2258 struct in_ifaddr *ifa;
2259 u32 addr = 0;
2260
2261 if (!dev)
2262 return 0;
2263
2264 rcu_read_lock();
e5ed6399 2265 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2266 if (!idev)
2267 goto out;
2268
2269 ifa = idev->ifa_list;
2270 if (!ifa)
2271 goto out;
2272
2273 addr = ifa->ifa_local;
2274out:
2275 rcu_read_unlock();
2276 return addr;
2277}
2278
2279static int bond_has_ip(struct bonding *bond)
2280{
2281 struct vlan_entry *vlan, *vlan_next;
2282
2283 if (bond->master_ip)
2284 return 1;
2285
2286 if (list_empty(&bond->vlan_list))
2287 return 0;
2288
2289 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2290 vlan_list) {
2291 if (vlan->vlan_ip)
2292 return 1;
2293 }
2294
2295 return 0;
2296}
2297
2298/*
2299 * We go to the (large) trouble of VLAN tagging ARP frames because
2300 * switches in VLAN mode (especially if ports are configured as
2301 * "native" to a VLAN) might not pass non-tagged frames.
2302 */
2303static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id)
2304{
2305 struct sk_buff *skb;
2306
2307 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2308 slave_dev->name, dest_ip, src_ip, vlan_id);
2309
2310 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2311 NULL, slave_dev->dev_addr, NULL);
2312
2313 if (!skb) {
2314 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2315 return;
2316 }
2317 if (vlan_id) {
2318 skb = vlan_put_tag(skb, vlan_id);
2319 if (!skb) {
2320 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2321 return;
2322 }
2323 }
2324 arp_xmit(skb);
2325}
2326
2327
1da177e4
LT		 2328static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2329{
c3ade5ca 2330 int i, vlan_id, rv;
1da177e4 2331 u32 *targets = bond->params.arp_targets;
c3ade5ca
JV		 2332 struct vlan_entry *vlan, *vlan_next;
2333 struct net_device *vlan_dev;
2334 struct flowi fl;
2335 struct rtable *rt;
1da177e4 2336
6b780567
MW		 2337 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2338 if (!targets[i])
2339 continue;
c3ade5ca
JV		 2340 dprintk("basa: target %x\n", targets[i]);
2341 if (list_empty(&bond->vlan_list)) {
2342 dprintk("basa: empty vlan: arp_send\n");
2343 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2344 bond->master_ip, 0);
2345 continue;
2346 }
2347
2348 /*
2349 * If VLANs are configured, we do a route lookup to
2350 * determine which VLAN interface would be used, so we
2351 * can tag the ARP with the proper VLAN tag.
2352 */
2353 memset(&fl, 0, sizeof(fl));
2354 fl.fl4_dst = targets[i];
2355 fl.fl4_tos = RTO_ONLINK;
2356
2357 rv = ip_route_output_key(&rt, &fl);
2358 if (rv) {
2359 if (net_ratelimit()) {
2360 printk(KERN_WARNING DRV_NAME
2361 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2362 bond->dev->name, NIPQUAD(fl.fl4_dst));
2363 }
2364 continue;
2365 }
2366
2367 /*
2368 * This target is not on a VLAN
2369 */
2370 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2371 ip_rt_put(rt);
c3ade5ca
JV		 2372 dprintk("basa: rtdev == bond->dev: arp_send\n");
2373 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2374 bond->master_ip, 0);
2375 continue;
2376 }
2377
2378 vlan_id = 0;
2379 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2380 vlan_list) {
2381 vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
2382 if (vlan_dev == rt->u.dst.dev) {
2383 vlan_id = vlan->vlan_id;
2384 dprintk("basa: vlan match on %s %d\n",
2385 vlan_dev->name, vlan_id);
2386 break;
2387 }
2388 }
2389
2390 if (vlan_id) {
ed4b9f80 2391 ip_rt_put(rt);
c3ade5ca
JV		 2392 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2393 vlan->vlan_ip, vlan_id);
2394 continue;
2395 }
2396
2397 if (net_ratelimit()) {
2398 printk(KERN_WARNING DRV_NAME
2399 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2400 bond->dev->name, NIPQUAD(fl.fl4_dst),
2401 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2402 }
ed4b9f80 2403 ip_rt_put(rt);
c3ade5ca
JV		 2404 }
2405}
2406
2407/*
2408 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2409 * for each VLAN above us.
2410 */
2411static void bond_send_gratuitous_arp(struct bonding *bond)
2412{
2413 struct slave *slave = bond->curr_active_slave;
2414 struct vlan_entry *vlan;
2415 struct net_device *vlan_dev;
2416
2417 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2418 slave ? slave->dev->name : "NULL");
2419 if (!slave)
2420 return;
2421
2422 if (bond->master_ip) {
2423 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
2424 bond->master_ip, 0);
2425 }
2426
2427 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
2428 vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
2429 if (vlan->vlan_ip) {
2430 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2431 vlan->vlan_ip, vlan->vlan_id);
2432 }
1da177e4
LT		 2433 }
2434}
2435
2436/*
2437 * this function is called regularly to monitor each slave's link
2438 * ensuring that traffic is being sent and received when arp monitoring
2439 * is used in load-balancing mode. if the adapter has been dormant, then an
2440 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2441 * arp monitoring in active backup mode.
2442 */
a77b5325 2443void bond_loadbalance_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2444{
2445 struct bonding *bond = bond_dev->priv;
2446 struct slave *slave, *oldcurrent;
2447 int do_failover = 0;
2448 int delta_in_ticks;
2449 int i;
2450
2451 read_lock(&bond->lock);
2452
2453 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2454
2455 if (bond->kill_timers) {
2456 goto out;
2457 }
2458
2459 if (bond->slave_cnt == 0) {
2460 goto re_arm;
2461 }
2462
2463 read_lock(&bond->curr_slave_lock);
2464 oldcurrent = bond->curr_active_slave;
2465 read_unlock(&bond->curr_slave_lock);
2466
2467 /* see if any of the previous devices are up now (i.e. they have
2468 * xmt and rcv traffic). the curr_active_slave does not come into
2469 * the picture unless it is null. also, slave->jiffies is not needed
2470 * here because we send an arp on each slave and give a slave as
2471 * long as it needs to get the tx/rx within the delta.
2472 * TODO: what about up/down delay in arp mode? it wasn't here before
2473 * so it can wait
2474 */
2475 bond_for_each_slave(bond, slave, i) {
2476 if (slave->link != BOND_LINK_UP) {
2477 if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) &&
2478 ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) {
2479
2480 slave->link = BOND_LINK_UP;
2481 slave->state = BOND_STATE_ACTIVE;
2482
2483 /* primary_slave has no meaning in round-robin
2484 * mode. the window of a slave being up and
2485 * curr_active_slave being null after enslaving
2486 * is closed.
2487 */
2488 if (!oldcurrent) {
2489 printk(KERN_INFO DRV_NAME
2490 ": %s: link status definitely "
2491 "up for interface %s, ",
2492 bond_dev->name,
2493 slave->dev->name);
2494 do_failover = 1;
2495 } else {
2496 printk(KERN_INFO DRV_NAME
2497 ": %s: interface %s is now up\n",
2498 bond_dev->name,
2499 slave->dev->name);
2500 }
2501 }
2502 } else {
2503 /* slave->link == BOND_LINK_UP */
2504
2505 /* not all switches will respond to an arp request
2506 * when the source ip is 0, so don't take the link down
2507 * if we don't know our ip yet
2508 */
2509 if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
2510 (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
c3ade5ca 2511 bond_has_ip(bond))) {
1da177e4
LT		 2512
2513 slave->link = BOND_LINK_DOWN;
2514 slave->state = BOND_STATE_BACKUP;
2515
2516 if (slave->link_failure_count < UINT_MAX) {
2517 slave->link_failure_count++;
2518 }
2519
2520 printk(KERN_INFO DRV_NAME
2521 ": %s: interface %s is now down.\n",
2522 bond_dev->name,
2523 slave->dev->name);
2524
2525 if (slave == oldcurrent) {
2526 do_failover = 1;
2527 }
2528 }
2529 }
2530
2531 /* note: if switch is in round-robin mode, all links
2532 * must tx arp to ensure all links rx an arp - otherwise
2533 * links may oscillate or not come up at all; if switch is
2534 * in something like xor mode, there is nothing we can
2535 * do - all replies will be rx'ed on same link causing slaves
2536 * to be unstable during low/no traffic periods
2537 */
2538 if (IS_UP(slave->dev)) {
2539 bond_arp_send_all(bond, slave);
2540 }
2541 }
2542
2543 if (do_failover) {
2544 write_lock(&bond->curr_slave_lock);
2545
2546 bond_select_active_slave(bond);
2547
1da177e4
LT		 2548 write_unlock(&bond->curr_slave_lock);
2549 }
2550
2551re_arm:
2552 if (bond->params.arp_interval) {
2553 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2554 }
2555out:
2556 read_unlock(&bond->lock);
2557}
2558
2559/*
2560 * When using arp monitoring in active-backup mode, this function is
2561 * called to determine if any backup slaves have went down or a new
2562 * current slave needs to be found.
2563 * The backup slaves never generate traffic, they are considered up by merely
2564 * receiving traffic. If the current slave goes down, each backup slave will
2565 * be given the opportunity to tx/rx an arp before being taken down - this
2566 * prevents all slaves from being taken down due to the current slave not
2567 * sending any traffic for the backups to receive. The arps are not necessarily
2568 * necessary, any tx and rx traffic will keep the current slave up. While any
2569 * rx traffic will keep the backup slaves up, the current slave is responsible
2570 * for generating traffic to keep them up regardless of any other traffic they
2571 * may have received.
2572 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2573 */
a77b5325 2574void bond_activebackup_arp_mon(struct net_device *bond_dev)
1da177e4
LT		 2575{
2576 struct bonding *bond = bond_dev->priv;
2577 struct slave *slave;
2578 int delta_in_ticks;
2579 int i;
2580
2581 read_lock(&bond->lock);
2582
2583 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2584
2585 if (bond->kill_timers) {
2586 goto out;
2587 }
2588
2589 if (bond->slave_cnt == 0) {
2590 goto re_arm;
2591 }
2592
2593 /* determine if any slave has come up or any backup slave has
2594 * gone down
2595 * TODO: what about up/down delay in arp mode? it wasn't here before
2596 * so it can wait
2597 */
2598 bond_for_each_slave(bond, slave, i) {
2599 if (slave->link != BOND_LINK_UP) {
2600 if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) {
2601
2602 slave->link = BOND_LINK_UP;
2603
2604 write_lock(&bond->curr_slave_lock);
2605
2606 if ((!bond->curr_active_slave) &&
2607 ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) {
2608 bond_change_active_slave(bond, slave);
2609 bond->current_arp_slave = NULL;
2610 } else if (bond->curr_active_slave != slave) {
2611 /* this slave has just come up but we
2612 * already have a current slave; this
2613 * can also happen if bond_enslave adds
2614 * a new slave that is up while we are
2615 * searching for a new slave
2616 */
2617 bond_set_slave_inactive_flags(slave);
2618 bond->current_arp_slave = NULL;
2619 }
2620
ff59c456
JV		 2621 bond_set_carrier(bond);
2622
1da177e4
LT		 2623 if (slave == bond->curr_active_slave) {
2624 printk(KERN_INFO DRV_NAME
2625 ": %s: %s is up and now the "
2626 "active interface\n",
2627 bond_dev->name,
2628 slave->dev->name);
ff59c456 2629 netif_carrier_on(bond->dev);
1da177e4
LT		 2630 } else {
2631 printk(KERN_INFO DRV_NAME
2632 ": %s: backup interface %s is "
2633 "now up\n",
2634 bond_dev->name,
2635 slave->dev->name);
2636 }
2637
2638 write_unlock(&bond->curr_slave_lock);
2639 }
2640 } else {
2641 read_lock(&bond->curr_slave_lock);
2642
2643 if ((slave != bond->curr_active_slave) &&
2644 (!bond->current_arp_slave) &&
2645 (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) &&
c3ade5ca 2646 bond_has_ip(bond))) {
1da177e4
LT		 2647 /* a backup slave has gone down; three times
2648 * the delta allows the current slave to be
2649 * taken out before the backup slave.
2650 * note: a non-null current_arp_slave indicates
2651 * the curr_active_slave went down and we are
2652 * searching for a new one; under this
2653 * condition we only take the curr_active_slave
2654 * down - this gives each slave a chance to
2655 * tx/rx traffic before being taken out
2656 */
2657
2658 read_unlock(&bond->curr_slave_lock);
2659
2660 slave->link = BOND_LINK_DOWN;
2661
2662 if (slave->link_failure_count < UINT_MAX) {
2663 slave->link_failure_count++;
2664 }
2665
2666 bond_set_slave_inactive_flags(slave);
2667
2668 printk(KERN_INFO DRV_NAME
2669 ": %s: backup interface %s is now down\n",
2670 bond_dev->name,
2671 slave->dev->name);
2672 } else {
2673 read_unlock(&bond->curr_slave_lock);
2674 }
2675 }
2676 }
2677
2678 read_lock(&bond->curr_slave_lock);
2679 slave = bond->curr_active_slave;
2680 read_unlock(&bond->curr_slave_lock);
2681
2682 if (slave) {
2683 /* if we have sent traffic in the past 2*arp_intervals but
2684 * haven't xmit and rx traffic in that time interval, select
2685 * a different slave. slave->jiffies is only updated when
2686 * a slave first becomes the curr_active_slave - not necessarily
2687 * after every arp; this ensures the slave has a full 2*delta
2688 * before being taken out. if a primary is being used, check
2689 * if it is up and needs to take over as the curr_active_slave
2690 */
2691 if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) ||
c3ade5ca
JV		 2692 (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) &&
2693 bond_has_ip(bond))) &&
1da177e4
LT		 2694 ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) {
2695
2696 slave->link = BOND_LINK_DOWN;
2697
2698 if (slave->link_failure_count < UINT_MAX) {
2699 slave->link_failure_count++;
2700 }
2701
2702 printk(KERN_INFO DRV_NAME
2703 ": %s: link status down for active interface "
2704 "%s, disabling it\n",
2705 bond_dev->name,
2706 slave->dev->name);
2707
2708 write_lock(&bond->curr_slave_lock);
2709
2710 bond_select_active_slave(bond);
2711 slave = bond->curr_active_slave;
2712
2713 write_unlock(&bond->curr_slave_lock);
2714
2715 bond->current_arp_slave = slave;
2716
2717 if (slave) {
2718 slave->jiffies = jiffies;
2719 }
2720 } else if ((bond->primary_slave) &&
2721 (bond->primary_slave != slave) &&
2722 (bond->primary_slave->link == BOND_LINK_UP)) {
2723 /* at this point, slave is the curr_active_slave */
2724 printk(KERN_INFO DRV_NAME
2725 ": %s: changing from interface %s to primary "
2726 "interface %s\n",
2727 bond_dev->name,
2728 slave->dev->name,
2729 bond->primary_slave->dev->name);
2730
2731 /* primary is up so switch to it */
2732 write_lock(&bond->curr_slave_lock);
2733 bond_change_active_slave(bond, bond->primary_slave);
2734 write_unlock(&bond->curr_slave_lock);
2735
2736 slave = bond->primary_slave;
2737 slave->jiffies = jiffies;
2738 } else {
2739 bond->current_arp_slave = NULL;
2740 }
2741
2742 /* the current slave must tx an arp to ensure backup slaves
2743 * rx traffic
2744 */
c3ade5ca 2745 if (slave && bond_has_ip(bond)) {
1da177e4
LT		 2746 bond_arp_send_all(bond, slave);
2747 }
2748 }
2749
2750 /* if we don't have a curr_active_slave, search for the next available
2751 * backup slave from the current_arp_slave and make it the candidate
2752 * for becoming the curr_active_slave
2753 */
2754 if (!slave) {
2755 if (!bond->current_arp_slave) {
2756 bond->current_arp_slave = bond->first_slave;
2757 }
2758
2759 if (bond->current_arp_slave) {
2760 bond_set_slave_inactive_flags(bond->current_arp_slave);
2761
2762 /* search for next candidate */
2f872f04 2763 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
1da177e4
LT		 2764 if (IS_UP(slave->dev)) {
2765 slave->link = BOND_LINK_BACK;
2766 bond_set_slave_active_flags(slave);
2767 bond_arp_send_all(bond, slave);
2768 slave->jiffies = jiffies;
2769 bond->current_arp_slave = slave;
2770 break;
2771 }
2772
2773 /* if the link state is up at this point, we
2774 * mark it down - this can happen if we have
2775 * simultaneous link failures and
2776 * reselect_active_interface doesn't make this
2777 * one the current slave so it is still marked
2778 * up when it is actually down
2779 */
2780 if (slave->link == BOND_LINK_UP) {
2781 slave->link = BOND_LINK_DOWN;
2782 if (slave->link_failure_count < UINT_MAX) {
2783 slave->link_failure_count++;
2784 }
2785
2786 bond_set_slave_inactive_flags(slave);
2787
2788 printk(KERN_INFO DRV_NAME
2789 ": %s: backup interface %s is "
2790 "now down.\n",
2791 bond_dev->name,
2792 slave->dev->name);
2793 }
2794 }
2795 }
2796 }
2797
2798re_arm:
2799 if (bond->params.arp_interval) {
2800 mod_timer(&bond->arp_timer, jiffies + delta_in_ticks);
2801 }
2802out:
2803 read_unlock(&bond->lock);
2804}
2805
2806/*------------------------------ proc/seq_file-------------------------------*/
2807
2808#ifdef CONFIG_PROC_FS
2809
2810#define SEQ_START_TOKEN ((void *)1)
2811
2812static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
2813{
2814 struct bonding *bond = seq->private;
2815 loff_t off = 0;
2816 struct slave *slave;
2817 int i;
2818
2819 /* make sure the bond won't be taken away */
2820 read_lock(&dev_base_lock);
2821 read_lock_bh(&bond->lock);
2822
2823 if (*pos == 0) {
2824 return SEQ_START_TOKEN;
2825 }
2826
2827 bond_for_each_slave(bond, slave, i) {
2828 if (++off == *pos) {
2829 return slave;
2830 }
2831 }
2832
2833 return NULL;
2834}
2835
2836static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
2837{
2838 struct bonding *bond = seq->private;
2839 struct slave *slave = v;
2840
2841 ++*pos;
2842 if (v == SEQ_START_TOKEN) {
2843 return bond->first_slave;
2844 }
2845
2846 slave = slave->next;
2847
2848 return (slave == bond->first_slave) ? NULL : slave;
2849}
2850
2851static void bond_info_seq_stop(struct seq_file *seq, void *v)
2852{
2853 struct bonding *bond = seq->private;
2854
2855 read_unlock_bh(&bond->lock);
2856 read_unlock(&dev_base_lock);
2857}
2858
2859static void bond_info_show_master(struct seq_file *seq)
2860{
2861 struct bonding *bond = seq->private;
2862 struct slave *curr;
4756b02f
MW		 2863 int i;
2864 u32 target;
1da177e4
LT		 2865
2866 read_lock(&bond->curr_slave_lock);
2867 curr = bond->curr_active_slave;
2868 read_unlock(&bond->curr_slave_lock);
2869
2870 seq_printf(seq, "Bonding Mode: %s\n",
2871 bond_mode_name(bond->params.mode));
2872
c61b75ad
MW		 2873 if (bond->params.mode == BOND_MODE_XOR ||
2874 bond->params.mode == BOND_MODE_8023AD) {
2875 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
2876 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
2877 bond->params.xmit_policy);
2878 }
2879
1da177e4
LT		 2880 if (USES_PRIMARY(bond->params.mode)) {
2881 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 2882 (bond->primary_slave) ?
2883 bond->primary_slave->dev->name : "None");
1da177e4
LT		 2884
2885 seq_printf(seq, "Currently Active Slave: %s\n",
2886 (curr) ? curr->dev->name : "None");
2887 }
2888
ff59c456
JV		 2889 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
2890 "up" : "down");
1da177e4
LT		 2891 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
2892 seq_printf(seq, "Up Delay (ms): %d\n",
2893 bond->params.updelay * bond->params.miimon);
2894 seq_printf(seq, "Down Delay (ms): %d\n",
2895 bond->params.downdelay * bond->params.miimon);
2896
4756b02f
MW		 2897
2898 /* ARP information */
2899 if(bond->params.arp_interval > 0) {
2900 int printed=0;
2901 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
2902 bond->params.arp_interval);
2903
2904 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
2905
2906 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
2907 if (!bond->params.arp_targets[i])
2908 continue;
2909 if (printed)
2910 seq_printf(seq, ",");
2911 target = ntohl(bond->params.arp_targets[i]);
2912 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
2913 printed = 1;
2914 }
2915 seq_printf(seq, "\n");
2916 }
2917
1da177e4
LT		 2918 if (bond->params.mode == BOND_MODE_8023AD) {
2919 struct ad_info ad_info;
2920
2921 seq_puts(seq, "\n802.3ad info\n");
2922 seq_printf(seq, "LACP rate: %s\n",
2923 (bond->params.lacp_fast) ? "fast" : "slow");
2924
2925 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
2926 seq_printf(seq, "bond %s has no active aggregator\n",
2927 bond->dev->name);
2928 } else {
2929 seq_printf(seq, "Active Aggregator Info:\n");
2930
2931 seq_printf(seq, "\tAggregator ID: %d\n",
2932 ad_info.aggregator_id);
2933 seq_printf(seq, "\tNumber of ports: %d\n",
2934 ad_info.ports);
2935 seq_printf(seq, "\tActor Key: %d\n",
2936 ad_info.actor_key);
2937 seq_printf(seq, "\tPartner Key: %d\n",
2938 ad_info.partner_key);
2939 seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
2940 ad_info.partner_system[0],
2941 ad_info.partner_system[1],
2942 ad_info.partner_system[2],
2943 ad_info.partner_system[3],
2944 ad_info.partner_system[4],
2945 ad_info.partner_system[5]);
2946 }
2947 }
2948}
2949
2950static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
2951{
2952 struct bonding *bond = seq->private;
2953
2954 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
2955 seq_printf(seq, "MII Status: %s\n",
2956 (slave->link == BOND_LINK_UP) ? "up" : "down");
2957 seq_printf(seq, "Link Failure Count: %d\n",
2958 slave->link_failure_count);
2959
217df670
JV		 2960 seq_printf(seq,
2961 "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n",
2962 slave->perm_hwaddr[0], slave->perm_hwaddr[1],
2963 slave->perm_hwaddr[2], slave->perm_hwaddr[3],
2964 slave->perm_hwaddr[4], slave->perm_hwaddr[5]);
1da177e4
LT		 2965
2966 if (bond->params.mode == BOND_MODE_8023AD) {
2967 const struct aggregator *agg
2968 = SLAVE_AD_INFO(slave).port.aggregator;
2969
2970 if (agg) {
2971 seq_printf(seq, "Aggregator ID: %d\n",
2972 agg->aggregator_identifier);
2973 } else {
2974 seq_puts(seq, "Aggregator ID: N/A\n");
2975 }
2976 }
2977}
2978
2979static int bond_info_seq_show(struct seq_file *seq, void *v)
2980{
2981 if (v == SEQ_START_TOKEN) {
2982 seq_printf(seq, "%s\n", version);
2983 bond_info_show_master(seq);
2984 } else {
2985 bond_info_show_slave(seq, v);
2986 }
2987
2988 return 0;
2989}
2990
2991static struct seq_operations bond_info_seq_ops = {
2992 .start = bond_info_seq_start,
2993 .next = bond_info_seq_next,
2994 .stop = bond_info_seq_stop,
2995 .show = bond_info_seq_show,
2996};
2997
2998static int bond_info_open(struct inode *inode, struct file *file)
2999{
3000 struct seq_file *seq;
3001 struct proc_dir_entry *proc;
3002 int res;
3003
3004 res = seq_open(file, &bond_info_seq_ops);
3005 if (!res) {
3006 /* recover the pointer buried in proc_dir_entry data */
3007 seq = file->private_data;
3008 proc = PDE(inode);
3009 seq->private = proc->data;
3010 }
3011
3012 return res;
3013}
3014
3015static struct file_operations bond_info_fops = {
3016 .owner = THIS_MODULE,
3017 .open = bond_info_open,
3018 .read = seq_read,
3019 .llseek = seq_lseek,
3020 .release = seq_release,
3021};
3022
3023static int bond_create_proc_entry(struct bonding *bond)
3024{
3025 struct net_device *bond_dev = bond->dev;
3026
3027 if (bond_proc_dir) {
3028 bond->proc_entry = create_proc_entry(bond_dev->name,
3029 S_IRUGO,
3030 bond_proc_dir);
3031 if (bond->proc_entry == NULL) {
3032 printk(KERN_WARNING DRV_NAME
3033 ": Warning: Cannot create /proc/net/%s/%s\n",
3034 DRV_NAME, bond_dev->name);
3035 } else {
3036 bond->proc_entry->data = bond;
3037 bond->proc_entry->proc_fops = &bond_info_fops;
3038 bond->proc_entry->owner = THIS_MODULE;
3039 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3040 }
3041 }
3042
3043 return 0;
3044}
3045
3046static void bond_remove_proc_entry(struct bonding *bond)
3047{
3048 if (bond_proc_dir && bond->proc_entry) {
3049 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3050 memset(bond->proc_file_name, 0, IFNAMSIZ);
3051 bond->proc_entry = NULL;
3052 }
3053}
3054
3055/* Create the bonding directory under /proc/net, if doesn't exist yet.
3056 * Caller must hold rtnl_lock.
3057 */
3058static void bond_create_proc_dir(void)
3059{
3060 int len = strlen(DRV_NAME);
3061
3062 for (bond_proc_dir = proc_net->subdir; bond_proc_dir;
3063 bond_proc_dir = bond_proc_dir->next) {
3064 if ((bond_proc_dir->namelen == len) &&
3065 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3066 break;
3067 }
3068 }
3069
3070 if (!bond_proc_dir) {
3071 bond_proc_dir = proc_mkdir(DRV_NAME, proc_net);
3072 if (bond_proc_dir) {
3073 bond_proc_dir->owner = THIS_MODULE;
3074 } else {
3075 printk(KERN_WARNING DRV_NAME
3076 ": Warning: cannot create /proc/net/%s\n",
3077 DRV_NAME);
3078 }
3079 }
3080}
3081
3082/* Destroy the bonding directory under /proc/net, if empty.
3083 * Caller must hold rtnl_lock.
3084 */
3085static void bond_destroy_proc_dir(void)
3086{
3087 struct proc_dir_entry *de;
3088
3089 if (!bond_proc_dir) {
3090 return;
3091 }
3092
3093 /* verify that the /proc dir is empty */
3094 for (de = bond_proc_dir->subdir; de; de = de->next) {
3095 /* ignore . and .. */
3096 if (*(de->name) != '.') {
3097 break;
3098 }
3099 }
3100
3101 if (de) {
3102 if (bond_proc_dir->owner == THIS_MODULE) {
3103 bond_proc_dir->owner = NULL;
3104 }
3105 } else {
3106 remove_proc_entry(DRV_NAME, proc_net);
3107 bond_proc_dir = NULL;
3108 }
3109}
3110#endif /* CONFIG_PROC_FS */
3111
3112/*-------------------------- netdev event handling --------------------------*/
3113
3114/*
3115 * Change device name
3116 */
3117static int bond_event_changename(struct bonding *bond)
3118{
3119#ifdef CONFIG_PROC_FS
3120 bond_remove_proc_entry(bond);
3121 bond_create_proc_entry(bond);
3122#endif
b76cdba9
MW		 3123 down_write(&(bonding_rwsem));
3124 bond_destroy_sysfs_entry(bond);
3125 bond_create_sysfs_entry(bond);
3126 up_write(&(bonding_rwsem));
1da177e4
LT		 3127 return NOTIFY_DONE;
3128}
3129
3130static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3131{
3132 struct bonding *event_bond = bond_dev->priv;
3133
3134 switch (event) {
3135 case NETDEV_CHANGENAME:
3136 return bond_event_changename(event_bond);
3137 case NETDEV_UNREGISTER:
3138 /*
3139 * TODO: remove a bond from the list?
3140 */
3141 break;
3142 default:
3143 break;
3144 }
3145
3146 return NOTIFY_DONE;
3147}
3148
3149static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3150{
3151 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3152 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3153
3154 switch (event) {
3155 case NETDEV_UNREGISTER:
3156 if (bond_dev) {
3157 bond_release(bond_dev, slave_dev);
3158 }
3159 break;
3160 case NETDEV_CHANGE:
3161 /*
3162 * TODO: is this what we get if somebody
3163 * sets up a hierarchical bond, then rmmod's
3164 * one of the slave bonding devices?
3165 */
3166 break;
3167 case NETDEV_DOWN:
3168 /*
3169 * ... Or is it this?
3170 */
3171 break;
3172 case NETDEV_CHANGEMTU:
3173 /*
3174 * TODO: Should slaves be allowed to
3175 * independently alter their MTU? For
3176 * an active-backup bond, slaves need
3177 * not be the same type of device, so
3178 * MTUs may vary. For other modes,
3179 * slaves arguably should have the
3180 * same MTUs. To do this, we'd need to
3181 * take over the slave's change_mtu
3182 * function for the duration of their
3183 * servitude.
3184 */
3185 break;
3186 case NETDEV_CHANGENAME:
3187 /*
3188 * TODO: handle changing the primary's name
3189 */
3190 break;
8531c5ff
AK		 3191 case NETDEV_FEAT_CHANGE:
3192 bond_compute_features(bond);
3193 break;
1da177e4
LT		 3194 default:
3195 break;
3196 }
3197
3198 return NOTIFY_DONE;
3199}
3200
3201/*
3202 * bond_netdev_event: handle netdev notifier chain events.
3203 *
3204 * This function receives events for the netdev chain. The caller (an
e041c683 3205 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3206 * locks for us to safely manipulate the slave devices (RTNL lock,
3207 * dev_probe_lock).
3208 */
3209static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3210{
3211 struct net_device *event_dev = (struct net_device *)ptr;
3212
3213 dprintk("event_dev: %s, event: %lx\n",
3214 (event_dev ? event_dev->name : "None"),
3215 event);
3216
3217 if (event_dev->flags & IFF_MASTER) {
3218 dprintk("IFF_MASTER\n");
3219 return bond_master_netdev_event(event, event_dev);
3220 }
3221
3222 if (event_dev->flags & IFF_SLAVE) {
3223 dprintk("IFF_SLAVE\n");
3224 return bond_slave_netdev_event(event, event_dev);
3225 }
3226
3227 return NOTIFY_DONE;
3228}
3229
c3ade5ca
JV		 3230/*
3231 * bond_inetaddr_event: handle inetaddr notifier chain events.
3232 *
3233 * We keep track of device IPs primarily to use as source addresses in
3234 * ARP monitor probes (rather than spewing out broadcasts all the time).
3235 *
3236 * We track one IP for the main device (if it has one), plus one per VLAN.
3237 */
3238static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3239{
3240 struct in_ifaddr *ifa = ptr;
3241 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3242 struct bonding *bond, *bond_next;
3243 struct vlan_entry *vlan, *vlan_next;
3244
3245 list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
3246 if (bond->dev == event_dev) {
3247 switch (event) {
3248 case NETDEV_UP:
3249 bond->master_ip = ifa->ifa_local;
3250 return NOTIFY_OK;
3251 case NETDEV_DOWN:
3252 bond->master_ip = bond_glean_dev_ip(bond->dev);
3253 return NOTIFY_OK;
3254 default:
3255 return NOTIFY_DONE;
3256 }
3257 }
3258
3259 if (list_empty(&bond->vlan_list))
3260 continue;
3261
3262 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
3263 vlan_list) {
3264 vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id];
3265 if (vlan_dev == event_dev) {
3266 switch (event) {
3267 case NETDEV_UP:
3268 vlan->vlan_ip = ifa->ifa_local;
3269 return NOTIFY_OK;
3270 case NETDEV_DOWN:
3271 vlan->vlan_ip =
3272 bond_glean_dev_ip(vlan_dev);
3273 return NOTIFY_OK;
3274 default:
3275 return NOTIFY_DONE;
3276 }
3277 }
3278 }
3279 }
3280 return NOTIFY_DONE;
3281}
3282
1da177e4
LT		 3283static struct notifier_block bond_netdev_notifier = {
3284 .notifier_call = bond_netdev_event,
3285};
3286
c3ade5ca
JV		 3287static struct notifier_block bond_inetaddr_notifier = {
3288 .notifier_call = bond_inetaddr_event,
3289};
3290
1da177e4
LT		 3291/*-------------------------- Packet type handling ---------------------------*/
3292
3293/* register to receive lacpdus on a bond */
3294static void bond_register_lacpdu(struct bonding *bond)
3295{
3296 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3297
3298 /* initialize packet type */
3299 pk_type->type = PKT_TYPE_LACPDU;
3300 pk_type->dev = bond->dev;
3301 pk_type->func = bond_3ad_lacpdu_recv;
3302
3303 dev_add_pack(pk_type);
3304}
3305
3306/* unregister to receive lacpdus on a bond */
3307static void bond_unregister_lacpdu(struct bonding *bond)
3308{
3309 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3310}
3311
169a3e66
JV		 3312/*---------------------------- Hashing Policies -----------------------------*/
3313
3314/*
3315 * Hash for the the output device based upon layer 3 and layer 4 data. If
3316 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3317 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3318 */
3319static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3320 struct net_device *bond_dev, int count)
3321{
3322 struct ethhdr *data = (struct ethhdr *)skb->data;
3323 struct iphdr *iph = skb->nh.iph;
3324 u16 *layer4hdr = (u16 *)((u32 *)iph + iph->ihl);
3325 int layer4_xor = 0;
3326
3327 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3328 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3329 (iph->protocol == IPPROTO_TCP ||
3330 iph->protocol == IPPROTO_UDP)) {
3331 layer4_xor = htons((*layer4hdr ^ *(layer4hdr + 1)));
3332 }
3333 return (layer4_xor ^
3334 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3335
3336 }
3337
3338 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3339}
3340
3341/*
3342 * Hash for the output device based upon layer 2 data
3343 */
3344static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3345 struct net_device *bond_dev, int count)
3346{
3347 struct ethhdr *data = (struct ethhdr *)skb->data;
3348
3349 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3350}
3351
1da177e4
LT		 3352/*-------------------------- Device entry points ----------------------------*/
3353
3354static int bond_open(struct net_device *bond_dev)
3355{
3356 struct bonding *bond = bond_dev->priv;
3357 struct timer_list *mii_timer = &bond->mii_timer;
3358 struct timer_list *arp_timer = &bond->arp_timer;
3359
3360 bond->kill_timers = 0;
3361
3362 if ((bond->params.mode == BOND_MODE_TLB) ||
3363 (bond->params.mode == BOND_MODE_ALB)) {
3364 struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer);
3365
3366 /* bond_alb_initialize must be called before the timer
3367 * is started.
3368 */
3369 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3370 /* something went wrong - fail the open operation */
3371 return -1;
3372 }
3373
3374 init_timer(alb_timer);
3375 alb_timer->expires = jiffies + 1;
3376 alb_timer->data = (unsigned long)bond;
3377 alb_timer->function = (void *)&bond_alb_monitor;
3378 add_timer(alb_timer);
3379 }
3380
3381 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3382 init_timer(mii_timer);
3383 mii_timer->expires = jiffies + 1;
3384 mii_timer->data = (unsigned long)bond_dev;
3385 mii_timer->function = (void *)&bond_mii_monitor;
3386 add_timer(mii_timer);
3387 }
3388
3389 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3390 init_timer(arp_timer);
3391 arp_timer->expires = jiffies + 1;
3392 arp_timer->data = (unsigned long)bond_dev;
3393 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
3394 arp_timer->function = (void *)&bond_activebackup_arp_mon;
3395 } else {
3396 arp_timer->function = (void *)&bond_loadbalance_arp_mon;
3397 }
3398 add_timer(arp_timer);
3399 }
3400
3401 if (bond->params.mode == BOND_MODE_8023AD) {
3402 struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer);
3403 init_timer(ad_timer);
3404 ad_timer->expires = jiffies + 1;
3405 ad_timer->data = (unsigned long)bond;
3406 ad_timer->function = (void *)&bond_3ad_state_machine_handler;
3407 add_timer(ad_timer);
3408
3409 /* register to receive LACPDUs */
3410 bond_register_lacpdu(bond);
3411 }
3412
3413 return 0;
3414}
3415
3416static int bond_close(struct net_device *bond_dev)
3417{
3418 struct bonding *bond = bond_dev->priv;
3419
3420 if (bond->params.mode == BOND_MODE_8023AD) {
3421 /* Unregister the receive of LACPDUs */
3422 bond_unregister_lacpdu(bond);
3423 }
3424
3425 write_lock_bh(&bond->lock);
3426
3427 bond_mc_list_destroy(bond);
3428
3429 /* signal timers not to re-arm */
3430 bond->kill_timers = 1;
3431
3432 write_unlock_bh(&bond->lock);
3433
3434 /* del_timer_sync must run without holding the bond->lock
3435 * because a running timer might be trying to hold it too
3436 */
3437
3438 if (bond->params.miimon) { /* link check interval, in milliseconds. */
3439 del_timer_sync(&bond->mii_timer);
3440 }
3441
3442 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
3443 del_timer_sync(&bond->arp_timer);
3444 }
3445
3446 switch (bond->params.mode) {
3447 case BOND_MODE_8023AD:
3448 del_timer_sync(&(BOND_AD_INFO(bond).ad_timer));
3449 break;
3450 case BOND_MODE_TLB:
3451 case BOND_MODE_ALB:
3452 del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer));
3453 break;
3454 default:
3455 break;
3456 }
3457
3458 /* Release the bonded slaves */
3459 bond_release_all(bond_dev);
3460
3461 if ((bond->params.mode == BOND_MODE_TLB) ||
3462 (bond->params.mode == BOND_MODE_ALB)) {
3463 /* Must be called only after all
3464 * slaves have been released
3465 */
3466 bond_alb_deinitialize(bond);
3467 }
3468
3469 return 0;
3470}
3471
3472static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3473{
3474 struct bonding *bond = bond_dev->priv;
3475 struct net_device_stats *stats = &(bond->stats), *sstats;
3476 struct slave *slave;
3477 int i;
3478
3479 memset(stats, 0, sizeof(struct net_device_stats));
3480
3481 read_lock_bh(&bond->lock);
3482
3483 bond_for_each_slave(bond, slave, i) {
3484 sstats = slave->dev->get_stats(slave->dev);
3485
3486 stats->rx_packets += sstats->rx_packets;
3487 stats->rx_bytes += sstats->rx_bytes;
3488 stats->rx_errors += sstats->rx_errors;
3489 stats->rx_dropped += sstats->rx_dropped;
3490
3491 stats->tx_packets += sstats->tx_packets;
3492 stats->tx_bytes += sstats->tx_bytes;
3493 stats->tx_errors += sstats->tx_errors;
3494 stats->tx_dropped += sstats->tx_dropped;
3495
3496 stats->multicast += sstats->multicast;
3497 stats->collisions += sstats->collisions;
3498
3499 stats->rx_length_errors += sstats->rx_length_errors;
3500 stats->rx_over_errors += sstats->rx_over_errors;
3501 stats->rx_crc_errors += sstats->rx_crc_errors;
3502 stats->rx_frame_errors += sstats->rx_frame_errors;
3503 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3504 stats->rx_missed_errors += sstats->rx_missed_errors;
3505
3506 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3507 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3508 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3509 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3510 stats->tx_window_errors += sstats->tx_window_errors;
3511 }
3512
3513 read_unlock_bh(&bond->lock);
3514
3515 return stats;
3516}
3517
3518static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3519{
3520 struct net_device *slave_dev = NULL;
3521 struct ifbond k_binfo;
3522 struct ifbond __user *u_binfo = NULL;
3523 struct ifslave k_sinfo;
3524 struct ifslave __user *u_sinfo = NULL;
3525 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3526 int res = 0;
3527
3528 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3529 bond_dev->name, cmd);
3530
3531 switch (cmd) {
1da177e4
LT		 3532 case SIOCGMIIPHY:
3533 mii = if_mii(ifr);
3534 if (!mii) {
3535 return -EINVAL;
3536 }
3537 mii->phy_id = 0;
3538 /* Fall Through */
3539 case SIOCGMIIREG:
3540 /*
3541 * We do this again just in case we were called by SIOCGMIIREG
3542 * instead of SIOCGMIIPHY.
3543 */
3544 mii = if_mii(ifr);
3545 if (!mii) {
3546 return -EINVAL;
3547 }
3548
3549 if (mii->reg_num == 1) {
3550 struct bonding *bond = bond_dev->priv;
3551 mii->val_out = 0;
3552 read_lock_bh(&bond->lock);
3553 read_lock(&bond->curr_slave_lock);
3554 if (bond->curr_active_slave) {
3555 mii->val_out = BMSR_LSTATUS;
3556 }
3557 read_unlock(&bond->curr_slave_lock);
3558 read_unlock_bh(&bond->lock);
3559 }
3560
3561 return 0;
3562 case BOND_INFO_QUERY_OLD:
3563 case SIOCBONDINFOQUERY:
3564 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3565
3566 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3567 return -EFAULT;
3568 }
3569
3570 res = bond_info_query(bond_dev, &k_binfo);
3571 if (res == 0) {
3572 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3573 return -EFAULT;
3574 }
3575 }
3576
3577 return res;
3578 case BOND_SLAVE_INFO_QUERY_OLD:
3579 case SIOCBONDSLAVEINFOQUERY:
3580 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3581
3582 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3583 return -EFAULT;
3584 }
3585
3586 res = bond_slave_info_query(bond_dev, &k_sinfo);
3587 if (res == 0) {
3588 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3589 return -EFAULT;
3590 }
3591 }
3592
3593 return res;
3594 default:
3595 /* Go on */
3596 break;
3597 }
3598
3599 if (!capable(CAP_NET_ADMIN)) {
3600 return -EPERM;
3601 }
3602
b76cdba9 3603 down_write(&(bonding_rwsem));
1da177e4
LT		 3604 slave_dev = dev_get_by_name(ifr->ifr_slave);
3605
3606 dprintk("slave_dev=%p: \n", slave_dev);
3607
3608 if (!slave_dev) {
3609 res = -ENODEV;
3610 } else {
3611 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3612 switch (cmd) {
3613 case BOND_ENSLAVE_OLD:
3614 case SIOCBONDENSLAVE:
3615 res = bond_enslave(bond_dev, slave_dev);
3616 break;
3617 case BOND_RELEASE_OLD:
3618 case SIOCBONDRELEASE:
3619 res = bond_release(bond_dev, slave_dev);
3620 break;
3621 case BOND_SETHWADDR_OLD:
3622 case SIOCBONDSETHWADDR:
3623 res = bond_sethwaddr(bond_dev, slave_dev);
3624 break;
3625 case BOND_CHANGE_ACTIVE_OLD:
3626 case SIOCBONDCHANGEACTIVE:
3627 res = bond_ioctl_change_active(bond_dev, slave_dev);
3628 break;
3629 default:
3630 res = -EOPNOTSUPP;
3631 }
3632
3633 dev_put(slave_dev);
3634 }
3635
b76cdba9 3636 up_write(&(bonding_rwsem));
1da177e4
LT		 3637 return res;
3638}
3639
3640static void bond_set_multicast_list(struct net_device *bond_dev)
3641{
3642 struct bonding *bond = bond_dev->priv;
3643 struct dev_mc_list *dmi;
3644
3645 write_lock_bh(&bond->lock);
3646
3647 /*
3648 * Do promisc before checking multicast_mode
3649 */
3650 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
3651 bond_set_promiscuity(bond, 1);
3652 }
3653
3654 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
3655 bond_set_promiscuity(bond, -1);
3656 }
3657
3658 /* set allmulti flag to slaves */
3659 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
3660 bond_set_allmulti(bond, 1);
3661 }
3662
3663 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
3664 bond_set_allmulti(bond, -1);
3665 }
3666
3667 bond->flags = bond_dev->flags;
3668
3669 /* looking for addresses to add to slaves' mc list */
3670 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3671 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
3672 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3673 }
3674 }
3675
3676 /* looking for addresses to delete from slaves' list */
3677 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3678 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
3679 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3680 }
3681 }
3682
3683 /* save master's multicast list */
3684 bond_mc_list_destroy(bond);
3685 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
3686
3687 write_unlock_bh(&bond->lock);
3688}
3689
3690/*
3691 * Change the MTU of all of a master's slaves to match the master
3692 */
3693static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3694{
3695 struct bonding *bond = bond_dev->priv;
3696 struct slave *slave, *stop_at;
3697 int res = 0;
3698 int i;
3699
3700 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
3701 (bond_dev ? bond_dev->name : "None"), new_mtu);
3702
3703 /* Can't hold bond->lock with bh disabled here since
3704 * some base drivers panic. On the other hand we can't
3705 * hold bond->lock without bh disabled because we'll
3706 * deadlock. The only solution is to rely on the fact
3707 * that we're under rtnl_lock here, and the slaves
3708 * list won't change. This doesn't solve the problem
3709 * of setting the slave's MTU while it is
3710 * transmitting, but the assumption is that the base
3711 * driver can handle that.
3712 *
3713 * TODO: figure out a way to safely iterate the slaves
3714 * list, but without holding a lock around the actual
3715 * call to the base driver.
3716 */
3717
3718 bond_for_each_slave(bond, slave, i) {
3719 dprintk("s %p s->p %p c_m %p\n", slave,
3720 slave->prev, slave->dev->change_mtu);
e944ef79 3721
1da177e4
LT		 3722 res = dev_set_mtu(slave->dev, new_mtu);
3723
3724 if (res) {
3725 /* If we failed to set the slave's mtu to the new value
3726 * we must abort the operation even in ACTIVE_BACKUP
3727 * mode, because if we allow the backup slaves to have
3728 * different mtu values than the active slave we'll
3729 * need to change their mtu when doing a failover. That
3730 * means changing their mtu from timer context, which
3731 * is probably not a good idea.
3732 */
3733 dprintk("err %d %s\n", res, slave->dev->name);
3734 goto unwind;
3735 }
3736 }
3737
3738 bond_dev->mtu = new_mtu;
3739
3740 return 0;
3741
3742unwind:
3743 /* unwind from head to the slave that failed */
3744 stop_at = slave;
3745 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3746 int tmp_res;
3747
3748 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
3749 if (tmp_res) {
3750 dprintk("unwind err %d dev %s\n", tmp_res,
3751 slave->dev->name);
3752 }
3753 }
3754
3755 return res;
3756}
3757
3758/*
3759 * Change HW address
3760 *
3761 * Note that many devices must be down to change the HW address, and
3762 * downing the master releases all slaves. We can make bonds full of
3763 * bonding devices to test this, however.
3764 */
3765static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
3766{
3767 struct bonding *bond = bond_dev->priv;
3768 struct sockaddr *sa = addr, tmp_sa;
3769 struct slave *slave, *stop_at;
3770 int res = 0;
3771 int i;
3772
3773 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
3774
3775 if (!is_valid_ether_addr(sa->sa_data)) {
3776 return -EADDRNOTAVAIL;
3777 }
3778
3779 /* Can't hold bond->lock with bh disabled here since
3780 * some base drivers panic. On the other hand we can't
3781 * hold bond->lock without bh disabled because we'll
3782 * deadlock. The only solution is to rely on the fact
3783 * that we're under rtnl_lock here, and the slaves
3784 * list won't change. This doesn't solve the problem
3785 * of setting the slave's hw address while it is
3786 * transmitting, but the assumption is that the base
3787 * driver can handle that.
3788 *
3789 * TODO: figure out a way to safely iterate the slaves
3790 * list, but without holding a lock around the actual
3791 * call to the base driver.
3792 */
3793
3794 bond_for_each_slave(bond, slave, i) {
3795 dprintk("slave %p %s\n", slave, slave->dev->name);
3796
3797 if (slave->dev->set_mac_address == NULL) {
3798 res = -EOPNOTSUPP;
3799 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
3800 goto unwind;
3801 }
3802
3803 res = dev_set_mac_address(slave->dev, addr);
3804 if (res) {
3805 /* TODO: consider downing the slave
3806 * and retry ?
3807 * User should expect communications
3808 * breakage anyway until ARP finish
3809 * updating, so...
3810 */
3811 dprintk("err %d %s\n", res, slave->dev->name);
3812 goto unwind;
3813 }
3814 }
3815
3816 /* success */
3817 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
3818 return 0;
3819
3820unwind:
3821 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
3822 tmp_sa.sa_family = bond_dev->type;
3823
3824 /* unwind from head to the slave that failed */
3825 stop_at = slave;
3826 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
3827 int tmp_res;
3828
3829 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
3830 if (tmp_res) {
3831 dprintk("unwind err %d dev %s\n", tmp_res,
3832 slave->dev->name);
3833 }
3834 }
3835
3836 return res;
3837}
3838
3839static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
3840{
3841 struct bonding *bond = bond_dev->priv;
3842 struct slave *slave, *start_at;
3843 int i;
3844 int res = 1;
3845
3846 read_lock(&bond->lock);
3847
3848 if (!BOND_IS_OK(bond)) {
3849 goto out;
3850 }
3851
3852 read_lock(&bond->curr_slave_lock);
3853 slave = start_at = bond->curr_active_slave;
3854 read_unlock(&bond->curr_slave_lock);
3855
3856 if (!slave) {
3857 goto out;
3858 }
3859
3860 bond_for_each_slave_from(bond, slave, i, start_at) {
3861 if (IS_UP(slave->dev) &&
3862 (slave->link == BOND_LINK_UP) &&
3863 (slave->state == BOND_STATE_ACTIVE)) {
3864 res = bond_dev_queue_xmit(bond, skb, slave->dev);
3865
3866 write_lock(&bond->curr_slave_lock);
3867 bond->curr_active_slave = slave->next;
3868 write_unlock(&bond->curr_slave_lock);
3869
3870 break;
3871 }
3872 }
3873
3874
3875out:
3876 if (res) {
3877 /* no suitable interface, frame not sent */
3878 dev_kfree_skb(skb);
3879 }
3880 read_unlock(&bond->lock);
3881 return 0;
3882}
3883
075897ce 3884static void bond_activebackup_xmit_copy(struct sk_buff *skb,
df49898a
JL		 3885 struct bonding *bond,
3886 struct slave *slave)
075897ce
JL		 3887{
3888 struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC);
3889 struct ethhdr *eth_data;
3890 u8 *hwaddr;
3891 int res;
3892
3893 if (!skb2) {
3894 printk(KERN_ERR DRV_NAME ": Error: "
3895 "bond_activebackup_xmit_copy(): skb_copy() failed\n");
3896 return;
3897 }
3898
3899 skb2->mac.raw = (unsigned char *)skb2->data;
3900 eth_data = eth_hdr(skb2);
3901
df49898a
JL		 3902 /* Pick an appropriate source MAC address
3903 * -- use slave's perm MAC addr, unless used by bond
3904 * -- otherwise, borrow active slave's perm MAC addr
3905 * since that will not be used
3906 */
075897ce
JL		 3907 hwaddr = slave->perm_hwaddr;
3908 if (!memcmp(eth_data->h_source, hwaddr, ETH_ALEN))
3909 hwaddr = bond->curr_active_slave->perm_hwaddr;
3910
3911 /* Set source MAC address appropriately */
3912 memcpy(eth_data->h_source, hwaddr, ETH_ALEN);
3913
3914 res = bond_dev_queue_xmit(bond, skb2, slave->dev);
3915 if (res)
3916 dev_kfree_skb(skb2);
3917
3918 return;
3919}
3920
1da177e4
LT		 3921/*
3922 * in active-backup mode, we know that bond->curr_active_slave is always valid if
3923 * the bond has a usable interface.
3924 */
3925static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
3926{
3927 struct bonding *bond = bond_dev->priv;
3928 int res = 1;
3929
1da177e4
LT		 3930 read_lock(&bond->lock);
3931 read_lock(&bond->curr_slave_lock);
3932
3933 if (!BOND_IS_OK(bond)) {
3934 goto out;
3935 }
3936
075897ce
JL		 3937 if (!bond->curr_active_slave)
3938 goto out;
3939
3940 /* Xmit IGMP frames on all slaves to ensure rapid fail-over
3941 for multicast traffic on snooping switches */
3942 if (skb->protocol == __constant_htons(ETH_P_IP) &&
3943 skb->nh.iph->protocol == IPPROTO_IGMP) {
3944 struct slave *slave, *active_slave;
3945 int i;
3946
3947 active_slave = bond->curr_active_slave;
3948 bond_for_each_slave_from_to(bond, slave, i, active_slave->next,
3949 active_slave->prev)
3950 if (IS_UP(slave->dev) &&
3951 (slave->link == BOND_LINK_UP))
3952 bond_activebackup_xmit_copy(skb, bond, slave);
1da177e4
LT		 3953 }
3954
075897ce
JL		 3955 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
3956
1da177e4
LT		 3957out:
3958 if (res) {
3959 /* no suitable interface, frame not sent */
3960 dev_kfree_skb(skb);
3961 }
3962 read_unlock(&bond->curr_slave_lock);
3963 read_unlock(&bond->lock);
3964 return 0;
3965}
3966
3967/*
169a3e66
JV		 3968 * In bond_xmit_xor() , we determine the output device by using a pre-
3969 * determined xmit_hash_policy(), If the selected device is not enabled,
3970 * find the next active slave.
1da177e4
LT		 3971 */
3972static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
3973{
3974 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3975 struct slave *slave, *start_at;
3976 int slave_no;
3977 int i;
3978 int res = 1;
3979
3980 read_lock(&bond->lock);
3981
3982 if (!BOND_IS_OK(bond)) {
3983 goto out;
3984 }
3985
169a3e66 3986 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 3987
3988 bond_for_each_slave(bond, slave, i) {
3989 slave_no--;
3990 if (slave_no < 0) {
3991 break;
3992 }
3993 }
3994
3995 start_at = slave;
3996
3997 bond_for_each_slave_from(bond, slave, i, start_at) {
3998 if (IS_UP(slave->dev) &&
3999 (slave->link == BOND_LINK_UP) &&
4000 (slave->state == BOND_STATE_ACTIVE)) {
4001 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4002 break;
4003 }
4004 }
4005
4006out:
4007 if (res) {
4008 /* no suitable interface, frame not sent */
4009 dev_kfree_skb(skb);
4010 }
4011 read_unlock(&bond->lock);
4012 return 0;
4013}
4014
4015/*
4016 * in broadcast mode, we send everything to all usable interfaces.
4017 */
4018static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4019{
4020 struct bonding *bond = bond_dev->priv;
4021 struct slave *slave, *start_at;
4022 struct net_device *tx_dev = NULL;
4023 int i;
4024 int res = 1;
4025
4026 read_lock(&bond->lock);
4027
4028 if (!BOND_IS_OK(bond)) {
4029 goto out;
4030 }
4031
4032 read_lock(&bond->curr_slave_lock);
4033 start_at = bond->curr_active_slave;
4034 read_unlock(&bond->curr_slave_lock);
4035
4036 if (!start_at) {
4037 goto out;
4038 }
4039
4040 bond_for_each_slave_from(bond, slave, i, start_at) {
4041 if (IS_UP(slave->dev) &&
4042 (slave->link == BOND_LINK_UP) &&
4043 (slave->state == BOND_STATE_ACTIVE)) {
4044 if (tx_dev) {
4045 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4046 if (!skb2) {
4047 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4048 ": %s: Error: bond_xmit_broadcast(): "
4049 "skb_clone() failed\n",
4050 bond_dev->name);
1da177e4
LT		 4051 continue;
4052 }
4053
4054 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4055 if (res) {
4056 dev_kfree_skb(skb2);
4057 continue;
4058 }
4059 }
4060 tx_dev = slave->dev;
4061 }
4062 }
4063
4064 if (tx_dev) {
4065 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4066 }
4067
4068out:
4069 if (res) {
4070 /* no suitable interface, frame not sent */
4071 dev_kfree_skb(skb);
4072 }
4073 /* frame sent to all suitable interfaces */
4074 read_unlock(&bond->lock);
4075 return 0;
4076}
4077
4078/*------------------------- Device initialization ---------------------------*/
4079
4080/*
4081 * set bond mode specific net device operations
4082 */
a77b5325 4083void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4084{
169a3e66
JV		 4085 struct net_device *bond_dev = bond->dev;
4086
1da177e4
LT		 4087 switch (mode) {
4088 case BOND_MODE_ROUNDROBIN:
4089 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4090 break;
4091 case BOND_MODE_ACTIVEBACKUP:
4092 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4093 break;
4094 case BOND_MODE_XOR:
4095 bond_dev->hard_start_xmit = bond_xmit_xor;
169a3e66
JV		 4096 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4097 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4098 else
4099 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4
LT		 4100 break;
4101 case BOND_MODE_BROADCAST:
4102 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4103 break;
4104 case BOND_MODE_8023AD:
8f903c70 4105 bond_set_master_3ad_flags(bond);
1da177e4 4106 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
169a3e66
JV		 4107 if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34)
4108 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4109 else
4110 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
1da177e4 4111 break;
1da177e4 4112 case BOND_MODE_ALB:
8f903c70
JV		 4113 bond_set_master_alb_flags(bond);
4114 /* FALLTHRU */
4115 case BOND_MODE_TLB:
1da177e4
LT		 4116 bond_dev->hard_start_xmit = bond_alb_xmit;
4117 bond_dev->set_mac_address = bond_alb_set_mac_address;
4118 break;
4119 default:
4120 /* Should never happen, mode already checked */
4121 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4122 ": %s: Error: Unknown bonding mode %d\n",
4123 bond_dev->name,
1da177e4
LT		 4124 mode);
4125 break;
4126 }
4127}
4128
217df670
JV		 4129static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4130 struct ethtool_drvinfo *drvinfo)
4131{
4132 strncpy(drvinfo->driver, DRV_NAME, 32);
4133 strncpy(drvinfo->version, DRV_VERSION, 32);
4134 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4135}
4136
8531c5ff
AK		 4137static struct ethtool_ops bond_ethtool_ops = {
4138 .get_tx_csum = ethtool_op_get_tx_csum,
a0de3adf
JV		 4139 .get_tso = ethtool_op_get_tso,
4140 .get_ufo = ethtool_op_get_ufo,
8531c5ff 4141 .get_sg = ethtool_op_get_sg,
217df670 4142 .get_drvinfo = bond_ethtool_get_drvinfo,
8531c5ff
AK		 4143};
4144
1da177e4
LT		 4145/*
4146 * Does not allocate but creates a /proc entry.
4147 * Allowed to fail.
4148 */
3c535952 4149static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4150{
4151 struct bonding *bond = bond_dev->priv;
4152
4153 dprintk("Begin bond_init for %s\n", bond_dev->name);
4154
4155 /* initialize rwlocks */
4156 rwlock_init(&bond->lock);
4157 rwlock_init(&bond->curr_slave_lock);
4158
4159 bond->params = *params; /* copy params struct */
4160
4161 /* Initialize pointers */
4162 bond->first_slave = NULL;
4163 bond->curr_active_slave = NULL;
4164 bond->current_arp_slave = NULL;
4165 bond->primary_slave = NULL;
4166 bond->dev = bond_dev;
4167 INIT_LIST_HEAD(&bond->vlan_list);
4168
4169 /* Initialize the device entry points */
4170 bond_dev->open = bond_open;
4171 bond_dev->stop = bond_close;
4172 bond_dev->get_stats = bond_get_stats;
4173 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4174 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4175 bond_dev->set_multicast_list = bond_set_multicast_list;
4176 bond_dev->change_mtu = bond_change_mtu;
4177 bond_dev->set_mac_address = bond_set_mac_address;
4178
169a3e66 4179 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4180
4181 bond_dev->destructor = free_netdev;
4182
4183 /* Initialize the device options */
4184 bond_dev->tx_queue_len = 0;
4185 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
4186
4187 /* At first, we block adding VLANs. That's the only way to
4188 * prevent problems that occur when adding VLANs over an
4189 * empty bond. The block will be removed once non-challenged
4190 * slaves are enslaved.
4191 */
4192 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4193
4194 /* don't acquire bond device's xmit_lock when
4195 * transmitting */
4196 bond_dev->features |= NETIF_F_LLTX;
4197
4198 /* By default, we declare the bond to be fully
4199 * VLAN hardware accelerated capable. Special
4200 * care is taken in the various xmit functions
4201 * when there are slaves that are not hw accel
4202 * capable
4203 */
4204 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4205 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4206 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4207 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4208 NETIF_F_HW_VLAN_RX |
4209 NETIF_F_HW_VLAN_FILTER);
4210
4211#ifdef CONFIG_PROC_FS
4212 bond_create_proc_entry(bond);
4213#endif
4214
4215 list_add_tail(&bond->bond_list, &bond_dev_list);
4216
4217 return 0;
4218}
4219
4220/* De-initialize device specific data.
4221 * Caller must hold rtnl_lock.
4222 */
a77b5325 4223void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4224{
4225 struct bonding *bond = bond_dev->priv;
4226
4227 list_del(&bond->bond_list);
4228
4229#ifdef CONFIG_PROC_FS
4230 bond_remove_proc_entry(bond);
4231#endif
4232}
4233
4234/* Unregister and free all bond devices.
4235 * Caller must hold rtnl_lock.
4236 */
4237static void bond_free_all(void)
4238{
4239 struct bonding *bond, *nxt;
4240
4241 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4242 struct net_device *bond_dev = bond->dev;
4243
4244 unregister_netdevice(bond_dev);
4245 bond_deinit(bond_dev);
4246 }
4247
4248#ifdef CONFIG_PROC_FS
4249 bond_destroy_proc_dir();
4250#endif
4251}
4252
4253/*------------------------- Module initialization ---------------------------*/
4254
4255/*
4256 * Convert string input module parms. Accept either the
4257 * number of the mode or its string name.
4258 */
a77b5325 4259int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
1da177e4
LT		 4260{
4261 int i;
4262
4263 for (i = 0; tbl[i].modename; i++) {
4264 if ((isdigit(*mode_arg) &&
4265 tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
4266 (strncmp(mode_arg, tbl[i].modename,
4267 strlen(tbl[i].modename)) == 0)) {
4268 return tbl[i].mode;
4269 }
4270 }
4271
4272 return -1;
4273}
4274
4275static int bond_check_params(struct bond_params *params)
4276{
4277 /*
4278 * Convert string parameters.
4279 */
4280 if (mode) {
4281 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4282 if (bond_mode == -1) {
4283 printk(KERN_ERR DRV_NAME
4284 ": Error: Invalid bonding mode \"%s\"\n",
4285 mode == NULL ? "NULL" : mode);
4286 return -EINVAL;
4287 }
4288 }
4289
169a3e66
JV		 4290 if (xmit_hash_policy) {
4291 if ((bond_mode != BOND_MODE_XOR) &&
4292 (bond_mode != BOND_MODE_8023AD)) {
4293 printk(KERN_INFO DRV_NAME
4294 ": xor_mode param is irrelevant in mode %s\n",
4295 bond_mode_name(bond_mode));
4296 } else {
4297 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4298 xmit_hashtype_tbl);
4299 if (xmit_hashtype == -1) {
4300 printk(KERN_ERR DRV_NAME
4301 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4302 xmit_hash_policy == NULL ? "NULL" :
4303 xmit_hash_policy);
4304 return -EINVAL;
4305 }
4306 }
4307 }
4308
1da177e4
LT		 4309 if (lacp_rate) {
4310 if (bond_mode != BOND_MODE_8023AD) {
4311 printk(KERN_INFO DRV_NAME
4312 ": lacp_rate param is irrelevant in mode %s\n",
4313 bond_mode_name(bond_mode));
4314 } else {
4315 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4316 if (lacp_fast == -1) {
4317 printk(KERN_ERR DRV_NAME
4318 ": Error: Invalid lacp rate \"%s\"\n",
4319 lacp_rate == NULL ? "NULL" : lacp_rate);
4320 return -EINVAL;
4321 }
4322 }
4323 }
4324
4325 if (max_bonds < 1 || max_bonds > INT_MAX) {
4326 printk(KERN_WARNING DRV_NAME
4327 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4328 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
1da177e4
LT		 4329 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4330 max_bonds = BOND_DEFAULT_MAX_BONDS;
4331 }
4332
4333 if (miimon < 0) {
4334 printk(KERN_WARNING DRV_NAME
4335 ": Warning: miimon module parameter (%d), "
4336 "not in range 0-%d, so it was reset to %d\n",
4337 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4338 miimon = BOND_LINK_MON_INTERV;
4339 }
4340
4341 if (updelay < 0) {
4342 printk(KERN_WARNING DRV_NAME
4343 ": Warning: updelay module parameter (%d), "
4344 "not in range 0-%d, so it was reset to 0\n",
4345 updelay, INT_MAX);
4346 updelay = 0;
4347 }
4348
4349 if (downdelay < 0) {
4350 printk(KERN_WARNING DRV_NAME
4351 ": Warning: downdelay module parameter (%d), "
4352 "not in range 0-%d, so it was reset to 0\n",
4353 downdelay, INT_MAX);
4354 downdelay = 0;
4355 }
4356
4357 if ((use_carrier != 0) && (use_carrier != 1)) {
4358 printk(KERN_WARNING DRV_NAME
4359 ": Warning: use_carrier module parameter (%d), "
4360 "not of valid value (0/1), so it was set to 1\n",
4361 use_carrier);
4362 use_carrier = 1;
4363 }
4364
4365 /* reset values for 802.3ad */
4366 if (bond_mode == BOND_MODE_8023AD) {
4367 if (!miimon) {
4368 printk(KERN_WARNING DRV_NAME
4369 ": Warning: miimon must be specified, "
4370 "otherwise bonding will not detect link "
4371 "failure, speed and duplex which are "
4372 "essential for 802.3ad operation\n");
4373 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4374 miimon = 100;
4375 }
4376 }
4377
4378 /* reset values for TLB/ALB */
4379 if ((bond_mode == BOND_MODE_TLB) ||
4380 (bond_mode == BOND_MODE_ALB)) {
4381 if (!miimon) {
4382 printk(KERN_WARNING DRV_NAME
4383 ": Warning: miimon must be specified, "
4384 "otherwise bonding will not detect link "
4385 "failure and link speed which are essential "
4386 "for TLB/ALB load balancing\n");
4387 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4388 miimon = 100;
4389 }
4390 }
4391
4392 if (bond_mode == BOND_MODE_ALB) {
4393 printk(KERN_NOTICE DRV_NAME
4394 ": In ALB mode you might experience client "
4395 "disconnections upon reconnection of a link if the "
4396 "bonding module updelay parameter (%d msec) is "
4397 "incompatible with the forwarding delay time of the "
4398 "switch\n",
4399 updelay);
4400 }
4401
4402 if (!miimon) {
4403 if (updelay || downdelay) {
4404 /* just warn the user the up/down delay will have
4405 * no effect since miimon is zero...
4406 */
4407 printk(KERN_WARNING DRV_NAME
4408 ": Warning: miimon module parameter not set "
4409 "and updelay (%d) or downdelay (%d) module "
4410 "parameter is set; updelay and downdelay have "
4411 "no effect unless miimon is set\n",
4412 updelay, downdelay);
4413 }
4414 } else {
4415 /* don't allow arp monitoring */
4416 if (arp_interval) {
4417 printk(KERN_WARNING DRV_NAME
4418 ": Warning: miimon (%d) and arp_interval (%d) "
4419 "can't be used simultaneously, disabling ARP "
4420 "monitoring\n",
4421 miimon, arp_interval);
4422 arp_interval = 0;
4423 }
4424
4425 if ((updelay % miimon) != 0) {
4426 printk(KERN_WARNING DRV_NAME
4427 ": Warning: updelay (%d) is not a multiple "
4428 "of miimon (%d), updelay rounded to %d ms\n",
4429 updelay, miimon, (updelay / miimon) * miimon);
4430 }
4431
4432 updelay /= miimon;
4433
4434 if ((downdelay % miimon) != 0) {
4435 printk(KERN_WARNING DRV_NAME
4436 ": Warning: downdelay (%d) is not a multiple "
4437 "of miimon (%d), downdelay rounded to %d ms\n",
4438 downdelay, miimon,
4439 (downdelay / miimon) * miimon);
4440 }
4441
4442 downdelay /= miimon;
4443 }
4444
4445 if (arp_interval < 0) {
4446 printk(KERN_WARNING DRV_NAME
4447 ": Warning: arp_interval module parameter (%d) "
4448 ", not in range 0-%d, so it was reset to %d\n",
4449 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4450 arp_interval = BOND_LINK_ARP_INTERV;
4451 }
4452
4453 for (arp_ip_count = 0;
4454 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4455 arp_ip_count++) {
4456 /* not complete check, but should be good enough to
4457 catch mistakes */
4458 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4459 printk(KERN_WARNING DRV_NAME
4460 ": Warning: bad arp_ip_target module parameter "
4461 "(%s), ARP monitoring will not be performed\n",
4462 arp_ip_target[arp_ip_count]);
4463 arp_interval = 0;
4464 } else {
4465 u32 ip = in_aton(arp_ip_target[arp_ip_count]);
4466 arp_target[arp_ip_count] = ip;
4467 }
4468 }
4469
4470 if (arp_interval && !arp_ip_count) {
4471 /* don't allow arping if no arp_ip_target given... */
4472 printk(KERN_WARNING DRV_NAME
4473 ": Warning: arp_interval module parameter (%d) "
4474 "specified without providing an arp_ip_target "
4475 "parameter, arp_interval was reset to 0\n",
4476 arp_interval);
4477 arp_interval = 0;
4478 }
4479
4480 if (miimon) {
4481 printk(KERN_INFO DRV_NAME
4482 ": MII link monitoring set to %d ms\n",
4483 miimon);
4484 } else if (arp_interval) {
4485 int i;
4486
4487 printk(KERN_INFO DRV_NAME
4488 ": ARP monitoring set to %d ms with %d target(s):",
4489 arp_interval, arp_ip_count);
4490
4491 for (i = 0; i < arp_ip_count; i++)
4492 printk (" %s", arp_ip_target[i]);
4493
4494 printk("\n");
4495
4496 } else {
4497 /* miimon and arp_interval not set, we need one so things
4498 * work as expected, see bonding.txt for details
4499 */
4500 printk(KERN_WARNING DRV_NAME
4501 ": Warning: either miimon or arp_interval and "
4502 "arp_ip_target module parameters must be specified, "
4503 "otherwise bonding will not detect link failures! see "
4504 "bonding.txt for details.\n");
4505 }
4506
4507 if (primary && !USES_PRIMARY(bond_mode)) {
4508 /* currently, using a primary only makes sense
4509 * in active backup, TLB or ALB modes
4510 */
4511 printk(KERN_WARNING DRV_NAME
4512 ": Warning: %s primary device specified but has no "
4513 "effect in %s mode\n",
4514 primary, bond_mode_name(bond_mode));
4515 primary = NULL;
4516 }
4517
4518 /* fill params struct with the proper values */
4519 params->mode = bond_mode;
169a3e66 4520 params->xmit_policy = xmit_hashtype;
1da177e4
LT		 4521 params->miimon = miimon;
4522 params->arp_interval = arp_interval;
4523 params->updelay = updelay;
4524 params->downdelay = downdelay;
4525 params->use_carrier = use_carrier;
4526 params->lacp_fast = lacp_fast;
4527 params->primary[0] = 0;
4528
4529 if (primary) {
4530 strncpy(params->primary, primary, IFNAMSIZ);
4531 params->primary[IFNAMSIZ - 1] = 0;
4532 }
4533
4534 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4535
4536 return 0;
4537}
4538
dfe60397
MW		 4539/* Create a new bond based on the specified name and bonding parameters.
4540 * Caller must NOT hold rtnl_lock; we need to release it here before we
4541 * set up our sysfs entries.
4542 */
4543int bond_create(char *name, struct bond_params *params, struct bonding **newbond)
4544{
4545 struct net_device *bond_dev;
4546 int res;
4547
4548 rtnl_lock();
4549 bond_dev = alloc_netdev(sizeof(struct bonding), name, ether_setup);
4550 if (!bond_dev) {
4551 printk(KERN_ERR DRV_NAME
4552 ": %s: eek! can't alloc netdev!\n",
4553 name);
4554 res = -ENOMEM;
4555 goto out_rtnl;
4556 }
4557
4558 /* bond_init() must be called after dev_alloc_name() (for the
4559 * /proc files), but before register_netdevice(), because we
4560 * need to set function pointers.
4561 */
4562
4563 res = bond_init(bond_dev, params);
4564 if (res < 0) {
4565 goto out_netdev;
4566 }
4567
4568 SET_MODULE_OWNER(bond_dev);
4569
4570 res = register_netdevice(bond_dev);
4571 if (res < 0) {
4572 goto out_bond;
4573 }
4574 if (newbond)
4575 *newbond = bond_dev->priv;
4576
ff59c456
JV		 4577 netif_carrier_off(bond_dev);
4578
dfe60397 4579 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 4580 res = bond_create_sysfs_entry(bond_dev->priv);
dfe60397
MW		 4581 goto done;
4582out_bond:
4583 bond_deinit(bond_dev);
4584out_netdev:
4585 free_netdev(bond_dev);
4586out_rtnl:
4587 rtnl_unlock();
4588done:
4589 return res;
4590}
4591
1da177e4
LT		 4592static int __init bonding_init(void)
4593{
1da177e4
LT		 4594 int i;
4595 int res;
dfe60397 4596 char new_bond_name[8]; /* Enough room for 999 bonds at init. */
1da177e4
LT		 4597
4598 printk(KERN_INFO "%s", version);
4599
dfe60397 4600 res = bond_check_params(&bonding_defaults);
1da177e4 4601 if (res) {
dfe60397 4602 goto out;
1da177e4
LT		 4603 }
4604
1da177e4
LT		 4605#ifdef CONFIG_PROC_FS
4606 bond_create_proc_dir();
4607#endif
1da177e4 4608 for (i = 0; i < max_bonds; i++) {
dfe60397
MW		 4609 sprintf(new_bond_name, "bond%d",i);
4610 res = bond_create(new_bond_name,&bonding_defaults, NULL);
4611 if (res)
4612 goto err;
1da177e4
LT		 4613 }
4614
b76cdba9
MW		 4615 res = bond_create_sysfs();
4616 if (res)
4617 goto err;
4618
1da177e4 4619 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4620 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 4621
dfe60397
MW		 4622 goto out;
4623err:
40abc270 4624 rtnl_lock();
1da177e4 4625 bond_free_all();
b76cdba9 4626 bond_destroy_sysfs();
1da177e4 4627 rtnl_unlock();
dfe60397 4628out:
1da177e4 4629 return res;
dfe60397 4630
1da177e4
LT		 4631}
4632
4633static void __exit bonding_exit(void)
4634{
4635 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4636 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4
LT		 4637
4638 rtnl_lock();
4639 bond_free_all();
b76cdba9 4640 bond_destroy_sysfs();
1da177e4
LT		 4641 rtnl_unlock();
4642}
4643
4644module_init(bonding_init);
4645module_exit(bonding_exit);
4646MODULE_LICENSE("GPL");
4647MODULE_VERSION(DRV_VERSION);
4648MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4649MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4650MODULE_SUPPORTED_DEVICE("most ethernet devices");
4651
4652/*
4653 * Local variables:
4654 * c-indent-level: 8
4655 * c-basic-offset: 8
4656 * tab-width: 8
4657 * End:
4658 */
4659
Clone of davem's net-next-2.6 tree