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bonding: fix ASSERT_RTNL that produces spurious warnings
[net-next-2.6.git] / drivers / net / bonding / bond_main.c
CommitLineData
1da177e4
LT		 1/*
2 * originally based on the dummy device.
3 *
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
6 *
7 * bonding.c: an Ethernet Bonding driver
8 *
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
10 * Cisco 5500
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
13 * Linux Bonding
14 * and probably many L2 switches ...
15 *
16 * How it works:
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
22 *
23 * ifconfig bond0 down
24 * will release all slaves, marking them as down.
25 *
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
31 *
1da177e4
LT		 32 */
33
34//#define BONDING_DEBUG 1
35
1da177e4
LT		 36#include <linux/kernel.h>
37#include <linux/module.h>
1da177e4
LT		 38#include <linux/types.h>
39#include <linux/fcntl.h>
40#include <linux/interrupt.h>
41#include <linux/ptrace.h>
42#include <linux/ioport.h>
43#include <linux/in.h>
169a3e66 44#include <net/ip.h>
1da177e4 45#include <linux/ip.h>
169a3e66
JV		 46#include <linux/tcp.h>
47#include <linux/udp.h>
1da177e4
LT		 48#include <linux/slab.h>
49#include <linux/string.h>
50#include <linux/init.h>
51#include <linux/timer.h>
52#include <linux/socket.h>
53#include <linux/ctype.h>
54#include <linux/inet.h>
55#include <linux/bitops.h>
56#include <asm/system.h>
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/uaccess.h>
60#include <linux/errno.h>
61#include <linux/netdevice.h>
62#include <linux/inetdevice.h>
a816c7c7 63#include <linux/igmp.h>
1da177e4
LT		 64#include <linux/etherdevice.h>
65#include <linux/skbuff.h>
66#include <net/sock.h>
67#include <linux/rtnetlink.h>
68#include <linux/proc_fs.h>
69#include <linux/seq_file.h>
70#include <linux/smp.h>
71#include <linux/if_ether.h>
72#include <net/arp.h>
73#include <linux/mii.h>
74#include <linux/ethtool.h>
75#include <linux/if_vlan.h>
76#include <linux/if_bonding.h>
b63bb739 77#include <linux/jiffies.h>
c3ade5ca 78#include <net/route.h>
457c4cbc 79#include <net/net_namespace.h>
1da177e4
LT		 80#include "bonding.h"
81#include "bond_3ad.h"
82#include "bond_alb.h"
83
84/*---------------------------- Module parameters ----------------------------*/
85
86/* monitor all links that often (in milliseconds). <=0 disables monitoring */
87#define BOND_LINK_MON_INTERV 0
88#define BOND_LINK_ARP_INTERV 0
89
90static int max_bonds = BOND_DEFAULT_MAX_BONDS;
91static int miimon = BOND_LINK_MON_INTERV;
92static int updelay = 0;
93static int downdelay = 0;
94static int use_carrier = 1;
95static char *mode = NULL;
96static char *primary = NULL;
97static char *lacp_rate = NULL;
169a3e66 98static char *xmit_hash_policy = NULL;
1da177e4
LT		 99static int arp_interval = BOND_LINK_ARP_INTERV;
100static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
f5b2b966 101static char *arp_validate = NULL;
dd957c57 102static int fail_over_mac = 0;
12479f9a 103struct bond_params bonding_defaults;
1da177e4
LT		 104
105module_param(max_bonds, int, 0);
106MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
107module_param(miimon, int, 0);
108MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
109module_param(updelay, int, 0);
110MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
111module_param(downdelay, int, 0);
2ac47660
MW		 112MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
113 "in milliseconds");
1da177e4 114module_param(use_carrier, int, 0);
2ac47660
MW		 115MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
116 "0 for off, 1 for on (default)");
1da177e4 117module_param(mode, charp, 0);
2ac47660
MW		 118MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
119 "1 for active-backup, 2 for balance-xor, "
120 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
121 "6 for balance-alb");
1da177e4
LT		 122module_param(primary, charp, 0);
123MODULE_PARM_DESC(primary, "Primary network device to use");
124module_param(lacp_rate, charp, 0);
2ac47660
MW		 125MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
126 "(slow/fast)");
169a3e66 127module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 128MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
129 ", 1 for layer 3+4");
1da177e4
LT		 130module_param(arp_interval, int, 0);
131MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
132module_param_array(arp_ip_target, charp, NULL, 0);
133MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV		 134module_param(arp_validate, charp, 0);
135MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
dd957c57
JV		 136module_param(fail_over_mac, int, 0);
137MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. 0 of off (default), 1 for on.");
1da177e4
LT		 138
139/*----------------------------- Global variables ----------------------------*/
140
f71e1309 141static const char * const version =
1da177e4
LT		 142 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
143
12479f9a 144LIST_HEAD(bond_dev_list);
1da177e4
LT		 145
146#ifdef CONFIG_PROC_FS
147static struct proc_dir_entry *bond_proc_dir = NULL;
148#endif
149
b76cdba9 150extern struct rw_semaphore bonding_rwsem;
d3bb52b0 151static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
1da177e4 152static int arp_ip_count = 0;
1da177e4 153static int bond_mode = BOND_MODE_ROUNDROBIN;
169a3e66 154static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
1da177e4 155static int lacp_fast = 0;
217df670 156
1da177e4 157
12479f9a 158struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 159{ "slow", AD_LACP_SLOW},
160{ "fast", AD_LACP_FAST},
161{ NULL, -1},
162};
163
12479f9a 164struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 165{ "balance-rr", BOND_MODE_ROUNDROBIN},
166{ "active-backup", BOND_MODE_ACTIVEBACKUP},
167{ "balance-xor", BOND_MODE_XOR},
168{ "broadcast", BOND_MODE_BROADCAST},
169{ "802.3ad", BOND_MODE_8023AD},
170{ "balance-tlb", BOND_MODE_TLB},
171{ "balance-alb", BOND_MODE_ALB},
172{ NULL, -1},
173};
174
12479f9a 175struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 176{ "layer2", BOND_XMIT_POLICY_LAYER2},
177{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
6f6652be 178{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
169a3e66
JV		 179{ NULL, -1},
180};
181
f5b2b966
JV		 182struct bond_parm_tbl arp_validate_tbl[] = {
183{ "none", BOND_ARP_VALIDATE_NONE},
184{ "active", BOND_ARP_VALIDATE_ACTIVE},
185{ "backup", BOND_ARP_VALIDATE_BACKUP},
186{ "all", BOND_ARP_VALIDATE_ALL},
187{ NULL, -1},
188};
189
1da177e4
LT		 190/*-------------------------- Forward declarations ---------------------------*/
191
c3ade5ca 192static void bond_send_gratuitous_arp(struct bonding *bond);
c50b85d0 193static void bond_deinit(struct net_device *bond_dev);
1da177e4
LT		 194
195/*---------------------------- General routines -----------------------------*/
196
4ad072c9 197static const char *bond_mode_name(int mode)
1da177e4
LT		 198{
199 switch (mode) {
200 case BOND_MODE_ROUNDROBIN :
201 return "load balancing (round-robin)";
202 case BOND_MODE_ACTIVEBACKUP :
203 return "fault-tolerance (active-backup)";
204 case BOND_MODE_XOR :
205 return "load balancing (xor)";
206 case BOND_MODE_BROADCAST :
207 return "fault-tolerance (broadcast)";
208 case BOND_MODE_8023AD:
209 return "IEEE 802.3ad Dynamic link aggregation";
210 case BOND_MODE_TLB:
211 return "transmit load balancing";
212 case BOND_MODE_ALB:
213 return "adaptive load balancing";
214 default:
215 return "unknown";
216 }
217}
218
219/*---------------------------------- VLAN -----------------------------------*/
220
221/**
222 * bond_add_vlan - add a new vlan id on bond
223 * @bond: bond that got the notification
224 * @vlan_id: the vlan id to add
225 *
226 * Returns -ENOMEM if allocation failed.
227 */
228static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
229{
230 struct vlan_entry *vlan;
231
232 dprintk("bond: %s, vlan id %d\n",
233 (bond ? bond->dev->name: "None"), vlan_id);
234
235 vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
236 if (!vlan) {
237 return -ENOMEM;
238 }
239
240 INIT_LIST_HEAD(&vlan->vlan_list);
241 vlan->vlan_id = vlan_id;
c3ade5ca 242 vlan->vlan_ip = 0;
1da177e4
LT		 243
244 write_lock_bh(&bond->lock);
245
246 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
247
248 write_unlock_bh(&bond->lock);
249
250 dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
251
252 return 0;
253}
254
255/**
256 * bond_del_vlan - delete a vlan id from bond
257 * @bond: bond that got the notification
258 * @vlan_id: the vlan id to delete
259 *
260 * returns -ENODEV if @vlan_id was not found in @bond.
261 */
262static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
263{
264 struct vlan_entry *vlan, *next;
265 int res = -ENODEV;
266
267 dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
268
269 write_lock_bh(&bond->lock);
270
271 list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) {
272 if (vlan->vlan_id == vlan_id) {
273 list_del(&vlan->vlan_list);
274
275 if ((bond->params.mode == BOND_MODE_TLB) ||
276 (bond->params.mode == BOND_MODE_ALB)) {
277 bond_alb_clear_vlan(bond, vlan_id);
278 }
279
280 dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
281 bond->dev->name);
282
283 kfree(vlan);
284
285 if (list_empty(&bond->vlan_list) &&
286 (bond->slave_cnt == 0)) {
287 /* Last VLAN removed and no slaves, so
288 * restore block on adding VLANs. This will
289 * be removed once new slaves that are not
290 * VLAN challenged will be added.
291 */
292 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
293 }
294
295 res = 0;
296 goto out;
297 }
298 }
299
300 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
301 bond->dev->name);
302
303out:
304 write_unlock_bh(&bond->lock);
305 return res;
306}
307
308/**
309 * bond_has_challenged_slaves
310 * @bond: the bond we're working on
311 *
312 * Searches the slave list. Returns 1 if a vlan challenged slave
313 * was found, 0 otherwise.
314 *
315 * Assumes bond->lock is held.
316 */
317static int bond_has_challenged_slaves(struct bonding *bond)
318{
319 struct slave *slave;
320 int i;
321
322 bond_for_each_slave(bond, slave, i) {
323 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
324 dprintk("found VLAN challenged slave - %s\n",
325 slave->dev->name);
326 return 1;
327 }
328 }
329
330 dprintk("no VLAN challenged slaves found\n");
331 return 0;
332}
333
334/**
335 * bond_next_vlan - safely skip to the next item in the vlans list.
336 * @bond: the bond we're working on
337 * @curr: item we're advancing from
338 *
339 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
340 * or @curr->next otherwise (even if it is @curr itself again).
341 *
342 * Caller must hold bond->lock
343 */
344struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
345{
346 struct vlan_entry *next, *last;
347
348 if (list_empty(&bond->vlan_list)) {
349 return NULL;
350 }
351
352 if (!curr) {
353 next = list_entry(bond->vlan_list.next,
354 struct vlan_entry, vlan_list);
355 } else {
356 last = list_entry(bond->vlan_list.prev,
357 struct vlan_entry, vlan_list);
358 if (last == curr) {
359 next = list_entry(bond->vlan_list.next,
360 struct vlan_entry, vlan_list);
361 } else {
362 next = list_entry(curr->vlan_list.next,
363 struct vlan_entry, vlan_list);
364 }
365 }
366
367 return next;
368}
369
370/**
371 * bond_dev_queue_xmit - Prepare skb for xmit.
372 *
373 * @bond: bond device that got this skb for tx.
374 * @skb: hw accel VLAN tagged skb to transmit
375 * @slave_dev: slave that is supposed to xmit this skbuff
376 *
377 * When the bond gets an skb to transmit that is
378 * already hardware accelerated VLAN tagged, and it
379 * needs to relay this skb to a slave that is not
380 * hw accel capable, the skb needs to be "unaccelerated",
381 * i.e. strip the hwaccel tag and re-insert it as part
382 * of the payload.
383 */
384int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
385{
386 unsigned short vlan_id;
387
388 if (!list_empty(&bond->vlan_list) &&
389 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
390 vlan_get_tag(skb, &vlan_id) == 0) {
391 skb->dev = slave_dev;
392 skb = vlan_put_tag(skb, vlan_id);
393 if (!skb) {
394 /* vlan_put_tag() frees the skb in case of error,
395 * so return success here so the calling functions
396 * won't attempt to free is again.
397 */
398 return 0;
399 }
400 } else {
401 skb->dev = slave_dev;
402 }
403
404 skb->priority = 1;
405 dev_queue_xmit(skb);
406
407 return 0;
408}
409
410/*
411 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
412 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
413 * lock because:
414 * a. This operation is performed in IOCTL context,
415 * b. The operation is protected by the RTNL semaphore in the 8021q code,
416 * c. Holding a lock with BH disabled while directly calling a base driver
417 * entry point is generally a BAD idea.
418 *
419 * The design of synchronization/protection for this operation in the 8021q
420 * module is good for one or more VLAN devices over a single physical device
421 * and cannot be extended for a teaming solution like bonding, so there is a
422 * potential race condition here where a net device from the vlan group might
423 * be referenced (either by a base driver or the 8021q code) while it is being
424 * removed from the system. However, it turns out we're not making matters
425 * worse, and if it works for regular VLAN usage it will work here too.
426*/
427
428/**
429 * bond_vlan_rx_register - Propagates registration to slaves
430 * @bond_dev: bonding net device that got called
431 * @grp: vlan group being registered
432 */
433static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
434{
435 struct bonding *bond = bond_dev->priv;
436 struct slave *slave;
437 int i;
438
439 bond->vlgrp = grp;
440
441 bond_for_each_slave(bond, slave, i) {
442 struct net_device *slave_dev = slave->dev;
443
444 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
445 slave_dev->vlan_rx_register) {
446 slave_dev->vlan_rx_register(slave_dev, grp);
447 }
448 }
449}
450
451/**
452 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
453 * @bond_dev: bonding net device that got called
454 * @vid: vlan id being added
455 */
456static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
457{
458 struct bonding *bond = bond_dev->priv;
459 struct slave *slave;
460 int i, res;
461
462 bond_for_each_slave(bond, slave, i) {
463 struct net_device *slave_dev = slave->dev;
464
465 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
466 slave_dev->vlan_rx_add_vid) {
467 slave_dev->vlan_rx_add_vid(slave_dev, vid);
468 }
469 }
470
471 res = bond_add_vlan(bond, vid);
472 if (res) {
473 printk(KERN_ERR DRV_NAME
4e0952c7 474 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 475 bond_dev->name, vid);
476 }
477}
478
479/**
480 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
481 * @bond_dev: bonding net device that got called
482 * @vid: vlan id being removed
483 */
484static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
485{
486 struct bonding *bond = bond_dev->priv;
487 struct slave *slave;
488 struct net_device *vlan_dev;
489 int i, res;
490
491 bond_for_each_slave(bond, slave, i) {
492 struct net_device *slave_dev = slave->dev;
493
494 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
495 slave_dev->vlan_rx_kill_vid) {
496 /* Save and then restore vlan_dev in the grp array,
497 * since the slave's driver might clear it.
498 */
5c15bdec 499 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
1da177e4 500 slave_dev->vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 501 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT		 502 }
503 }
504
505 res = bond_del_vlan(bond, vid);
506 if (res) {
507 printk(KERN_ERR DRV_NAME
4e0952c7 508 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 509 bond_dev->name, vid);
510 }
511}
512
513static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
514{
515 struct vlan_entry *vlan;
516
517 write_lock_bh(&bond->lock);
518
519 if (list_empty(&bond->vlan_list)) {
520 goto out;
521 }
522
523 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
524 slave_dev->vlan_rx_register) {
525 slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
526 }
527
528 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
529 !(slave_dev->vlan_rx_add_vid)) {
530 goto out;
531 }
532
533 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
534 slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
535 }
536
537out:
538 write_unlock_bh(&bond->lock);
539}
540
541static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
542{
543 struct vlan_entry *vlan;
544 struct net_device *vlan_dev;
545
546 write_lock_bh(&bond->lock);
547
548 if (list_empty(&bond->vlan_list)) {
549 goto out;
550 }
551
552 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
553 !(slave_dev->vlan_rx_kill_vid)) {
554 goto unreg;
555 }
556
557 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
558 /* Save and then restore vlan_dev in the grp array,
559 * since the slave's driver might clear it.
560 */
5c15bdec 561 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
1da177e4 562 slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 563 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT		 564 }
565
566unreg:
567 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
568 slave_dev->vlan_rx_register) {
569 slave_dev->vlan_rx_register(slave_dev, NULL);
570 }
571
572out:
573 write_unlock_bh(&bond->lock);
574}
575
576/*------------------------------- Link status -------------------------------*/
577
ff59c456
JV		 578/*
579 * Set the carrier state for the master according to the state of its
580 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
581 * do special 802.3ad magic.
582 *
583 * Returns zero if carrier state does not change, nonzero if it does.
584 */
585static int bond_set_carrier(struct bonding *bond)
586{
587 struct slave *slave;
588 int i;
589
590 if (bond->slave_cnt == 0)
591 goto down;
592
593 if (bond->params.mode == BOND_MODE_8023AD)
594 return bond_3ad_set_carrier(bond);
595
596 bond_for_each_slave(bond, slave, i) {
597 if (slave->link == BOND_LINK_UP) {
598 if (!netif_carrier_ok(bond->dev)) {
599 netif_carrier_on(bond->dev);
600 return 1;
601 }
602 return 0;
603 }
604 }
605
606down:
607 if (netif_carrier_ok(bond->dev)) {
608 netif_carrier_off(bond->dev);
609 return 1;
610 }
611 return 0;
612}
613
1da177e4
LT		 614/*
615 * Get link speed and duplex from the slave's base driver
616 * using ethtool. If for some reason the call fails or the
617 * values are invalid, fake speed and duplex to 100/Full
618 * and return error.
619 */
620static int bond_update_speed_duplex(struct slave *slave)
621{
622 struct net_device *slave_dev = slave->dev;
1da177e4 623 struct ethtool_cmd etool;
61a44b9c 624 int res;
1da177e4
LT		 625
626 /* Fake speed and duplex */
627 slave->speed = SPEED_100;
628 slave->duplex = DUPLEX_FULL;
629
61a44b9c
MW		 630 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
631 return -1;
1da177e4 632
61a44b9c
MW		 633 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
634 if (res < 0)
1da177e4 635 return -1;
1da177e4 636
1da177e4
LT		 637 switch (etool.speed) {
638 case SPEED_10:
639 case SPEED_100:
640 case SPEED_1000:
94dbffd5 641 case SPEED_10000:
1da177e4
LT		 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;
1da177e4
LT		 682
683 if (bond->params.use_carrier) {
684 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
685 }
686
687 ioctl = slave_dev->do_ioctl;
688 if (ioctl) {
689 /* TODO: set pointer to correct ioctl on a per team member */
690 /* bases to make this more efficient. that is, once */
691 /* we determine the correct ioctl, we will always */
692 /* call it and not the others for that team */
693 /* member. */
694
695 /*
696 * We cannot assume that SIOCGMIIPHY will also read a
697 * register; not all network drivers (e.g., e100)
698 * support that.
699 */
700
701 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
702 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
703 mii = if_mii(&ifr);
704 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
705 mii->reg_num = MII_BMSR;
706 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
707 return (mii->val_out & BMSR_LSTATUS);
708 }
709 }
710 }
711
61a44b9c
MW		 712 /*
713 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
714 * attempt to get link status from it if the above MII ioctls fail.
715 */
1da177e4
LT		 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
1da177e4
LT		 726 /*
727 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 728 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT		 729 * cannot report link status). If not reporting, pretend
730 * we're ok.
731 */
732 return (reporting ? -1 : BMSR_LSTATUS);
733}
734
735/*----------------------------- Multicast list ------------------------------*/
736
737/*
738 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
739 */
740static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
741{
742 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
743 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
744}
745
746/*
747 * returns dmi entry if found, NULL otherwise
748 */
749static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
750{
751 struct dev_mc_list *idmi;
752
753 for (idmi = mc_list; idmi; idmi = idmi->next) {
754 if (bond_is_dmi_same(dmi, idmi)) {
755 return idmi;
756 }
757 }
758
759 return NULL;
760}
761
762/*
763 * Push the promiscuity flag down to appropriate slaves
764 */
765static void bond_set_promiscuity(struct bonding *bond, int inc)
766{
767 if (USES_PRIMARY(bond->params.mode)) {
768 /* write lock already acquired */
769 if (bond->curr_active_slave) {
770 dev_set_promiscuity(bond->curr_active_slave->dev, inc);
771 }
772 } else {
773 struct slave *slave;
774 int i;
775 bond_for_each_slave(bond, slave, i) {
776 dev_set_promiscuity(slave->dev, inc);
777 }
778 }
779}
780
781/*
782 * Push the allmulti flag down to all slaves
783 */
784static void bond_set_allmulti(struct bonding *bond, int inc)
785{
786 if (USES_PRIMARY(bond->params.mode)) {
787 /* write lock already acquired */
788 if (bond->curr_active_slave) {
789 dev_set_allmulti(bond->curr_active_slave->dev, inc);
790 }
791 } else {
792 struct slave *slave;
793 int i;
794 bond_for_each_slave(bond, slave, i) {
795 dev_set_allmulti(slave->dev, inc);
796 }
797 }
798}
799
800/*
801 * Add a Multicast address to slaves
802 * according to mode
803 */
804static void bond_mc_add(struct bonding *bond, void *addr, int alen)
805{
806 if (USES_PRIMARY(bond->params.mode)) {
807 /* write lock already acquired */
808 if (bond->curr_active_slave) {
809 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
810 }
811 } else {
812 struct slave *slave;
813 int i;
814 bond_for_each_slave(bond, slave, i) {
815 dev_mc_add(slave->dev, addr, alen, 0);
816 }
817 }
818}
819
820/*
821 * Remove a multicast address from slave
822 * according to mode
823 */
824static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
825{
826 if (USES_PRIMARY(bond->params.mode)) {
827 /* write lock already acquired */
828 if (bond->curr_active_slave) {
829 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
830 }
831 } else {
832 struct slave *slave;
833 int i;
834 bond_for_each_slave(bond, slave, i) {
835 dev_mc_delete(slave->dev, addr, alen, 0);
836 }
837 }
838}
839
a816c7c7
JV		 840
841/*
842 * Retrieve the list of registered multicast addresses for the bonding
843 * device and retransmit an IGMP JOIN request to the current active
844 * slave.
845 */
846static void bond_resend_igmp_join_requests(struct bonding *bond)
847{
848 struct in_device *in_dev;
849 struct ip_mc_list *im;
850
851 rcu_read_lock();
852 in_dev = __in_dev_get_rcu(bond->dev);
853 if (in_dev) {
854 for (im = in_dev->mc_list; im; im = im->next) {
855 ip_mc_rejoin_group(im);
856 }
857 }
858
859 rcu_read_unlock();
860}
861
1da177e4
LT		 862/*
863 * Totally destroys the mc_list in bond
864 */
865static void bond_mc_list_destroy(struct bonding *bond)
866{
867 struct dev_mc_list *dmi;
868
869 dmi = bond->mc_list;
870 while (dmi) {
871 bond->mc_list = dmi->next;
872 kfree(dmi);
873 dmi = bond->mc_list;
874 }
a816c7c7 875 bond->mc_list = NULL;
1da177e4
LT		 876}
877
878/*
879 * Copy all the Multicast addresses from src to the bonding device dst
880 */
de54f390 881static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 882 gfp_t gfp_flag)
1da177e4
LT		 883{
884 struct dev_mc_list *dmi, *new_dmi;
885
886 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 887 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT		 888
889 if (!new_dmi) {
890 /* FIXME: Potential memory leak !!! */
891 return -ENOMEM;
892 }
893
894 new_dmi->next = bond->mc_list;
895 bond->mc_list = new_dmi;
896 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
897 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
898 new_dmi->dmi_users = dmi->dmi_users;
899 new_dmi->dmi_gusers = dmi->dmi_gusers;
900 }
901
902 return 0;
903}
904
905/*
906 * flush all members of flush->mc_list from device dev->mc_list
907 */
908static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
909{
910 struct bonding *bond = bond_dev->priv;
911 struct dev_mc_list *dmi;
912
913 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
914 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
915 }
916
917 if (bond->params.mode == BOND_MODE_8023AD) {
918 /* del lacpdu mc addr from mc list */
919 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
920
921 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
922 }
923}
924
925/*--------------------------- Active slave change ---------------------------*/
926
927/*
928 * Update the mc list and multicast-related flags for the new and
929 * old active slaves (if any) according to the multicast mode, and
930 * promiscuous flags unconditionally.
931 */
932static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
933{
934 struct dev_mc_list *dmi;
935
936 if (!USES_PRIMARY(bond->params.mode)) {
937 /* nothing to do - mc list is already up-to-date on
938 * all slaves
939 */
940 return;
941 }
942
943 if (old_active) {
944 if (bond->dev->flags & IFF_PROMISC) {
945 dev_set_promiscuity(old_active->dev, -1);
946 }
947
948 if (bond->dev->flags & IFF_ALLMULTI) {
949 dev_set_allmulti(old_active->dev, -1);
950 }
951
952 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
953 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
954 }
955 }
956
957 if (new_active) {
958 if (bond->dev->flags & IFF_PROMISC) {
959 dev_set_promiscuity(new_active->dev, 1);
960 }
961
962 if (bond->dev->flags & IFF_ALLMULTI) {
963 dev_set_allmulti(new_active->dev, 1);
964 }
965
966 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
967 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
968 }
a816c7c7 969 bond_resend_igmp_join_requests(bond);
1da177e4
LT		 970 }
971}
972
973/**
974 * find_best_interface - select the best available slave to be the active one
975 * @bond: our bonding struct
976 *
977 * Warning: Caller must hold curr_slave_lock for writing.
978 */
979static struct slave *bond_find_best_slave(struct bonding *bond)
980{
981 struct slave *new_active, *old_active;
982 struct slave *bestslave = NULL;
983 int mintime = bond->params.updelay;
984 int i;
985
986 new_active = old_active = bond->curr_active_slave;
987
988 if (!new_active) { /* there were no active slaves left */
989 if (bond->slave_cnt > 0) { /* found one slave */
990 new_active = bond->first_slave;
991 } else {
992 return NULL; /* still no slave, return NULL */
993 }
994 }
995
996 /* first try the primary link; if arping, a link must tx/rx traffic
997 * before it can be considered the curr_active_slave - also, we would skip
998 * slaves between the curr_active_slave and primary_slave that may be up
999 * and able to arp
1000 */
1001 if ((bond->primary_slave) &&
1002 (!bond->params.arp_interval) &&
1003 (IS_UP(bond->primary_slave->dev))) {
1004 new_active = bond->primary_slave;
1005 }
1006
1007 /* remember where to stop iterating over the slaves */
1008 old_active = new_active;
1009
1010 bond_for_each_slave_from(bond, new_active, i, old_active) {
1011 if (IS_UP(new_active->dev)) {
1012 if (new_active->link == BOND_LINK_UP) {
1013 return new_active;
1014 } else if (new_active->link == BOND_LINK_BACK) {
1015 /* link up, but waiting for stabilization */
1016 if (new_active->delay < mintime) {
1017 mintime = new_active->delay;
1018 bestslave = new_active;
1019 }
1020 }
1021 }
1022 }
1023
1024 return bestslave;
1025}
1026
1027/**
1028 * change_active_interface - change the active slave into the specified one
1029 * @bond: our bonding struct
1030 * @new: the new slave to make the active one
1031 *
1032 * Set the new slave to the bond's settings and unset them on the old
1033 * curr_active_slave.
1034 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1035 *
1036 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1037 * because it is apparently the best available slave we have, even though its
1038 * updelay hasn't timed out yet.
1039 *
1040 * Warning: Caller must hold curr_slave_lock for writing.
1041 */
a77b5325 1042void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1043{
1044 struct slave *old_active = bond->curr_active_slave;
1045
1046 if (old_active == new_active) {
1047 return;
1048 }
1049
1050 if (new_active) {
1051 if (new_active->link == BOND_LINK_BACK) {
1052 if (USES_PRIMARY(bond->params.mode)) {
1053 printk(KERN_INFO DRV_NAME
1054 ": %s: making interface %s the new "
1055 "active one %d ms earlier.\n",
1056 bond->dev->name, new_active->dev->name,
1057 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1058 }
1059
1060 new_active->delay = 0;
1061 new_active->link = BOND_LINK_UP;
1062 new_active->jiffies = jiffies;
1063
1064 if (bond->params.mode == BOND_MODE_8023AD) {
1065 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1066 }
1067
1068 if ((bond->params.mode == BOND_MODE_TLB) ||
1069 (bond->params.mode == BOND_MODE_ALB)) {
1070 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1071 }
1072 } else {
1073 if (USES_PRIMARY(bond->params.mode)) {
1074 printk(KERN_INFO DRV_NAME
1075 ": %s: making interface %s the new "
1076 "active one.\n",
1077 bond->dev->name, new_active->dev->name);
1078 }
1079 }
1080 }
1081
1da177e4
LT		 1082 if (USES_PRIMARY(bond->params.mode)) {
1083 bond_mc_swap(bond, new_active, old_active);
1084 }
1085
1086 if ((bond->params.mode == BOND_MODE_TLB) ||
1087 (bond->params.mode == BOND_MODE_ALB)) {
1088 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1089 if (old_active)
1090 bond_set_slave_inactive_flags(old_active);
1091 if (new_active)
1092 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1093 } else {
1094 bond->curr_active_slave = new_active;
1095 }
c3ade5ca
JV		 1096
1097 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1098 if (old_active) {
1099 bond_set_slave_inactive_flags(old_active);
1100 }
1101
1102 if (new_active) {
1103 bond_set_slave_active_flags(new_active);
1104 }
2ab82852
MS		 1105
1106 /* when bonding does not set the slave MAC address, the bond MAC
1107 * address is the one of the active slave.
1108 */
dd957c57 1109 if (new_active && bond->params.fail_over_mac)
2ab82852
MS		 1110 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1111 new_active->dev->addr_len);
1053f62c
MS		 1112 if (bond->curr_active_slave &&
1113 test_bit(__LINK_STATE_LINKWATCH_PENDING,
1114 &bond->curr_active_slave->dev->state)) {
1115 dprintk("delaying gratuitous arp on %s\n",
1116 bond->curr_active_slave->dev->name);
1117 bond->send_grat_arp = 1;
1118 } else
1119 bond_send_gratuitous_arp(bond);
c3ade5ca 1120 }
1da177e4
LT		 1121}
1122
1123/**
1124 * bond_select_active_slave - select a new active slave, if needed
1125 * @bond: our bonding struct
1126 *
1127 * This functions shoud be called when one of the following occurs:
1128 * - The old curr_active_slave has been released or lost its link.
1129 * - The primary_slave has got its link back.
1130 * - A slave has got its link back and there's no old curr_active_slave.
1131 *
1132 * Warning: Caller must hold curr_slave_lock for writing.
1133 */
a77b5325 1134void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1135{
1136 struct slave *best_slave;
ff59c456 1137 int rv;
1da177e4
LT		 1138
1139 best_slave = bond_find_best_slave(bond);
1140 if (best_slave != bond->curr_active_slave) {
1141 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1142 rv = bond_set_carrier(bond);
1143 if (!rv)
1144 return;
1145
1146 if (netif_carrier_ok(bond->dev)) {
1147 printk(KERN_INFO DRV_NAME
1148 ": %s: first active interface up!\n",
1149 bond->dev->name);
1150 } else {
1151 printk(KERN_INFO DRV_NAME ": %s: "
1152 "now running without any active interface !\n",
1153 bond->dev->name);
1154 }
1da177e4
LT		 1155 }
1156}
1157
1158/*--------------------------- slave list handling ---------------------------*/
1159
1160/*
1161 * This function attaches the slave to the end of list.
1162 *
1163 * bond->lock held for writing by caller.
1164 */
1165static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1166{
1167 if (bond->first_slave == NULL) { /* attaching the first slave */
1168 new_slave->next = new_slave;
1169 new_slave->prev = new_slave;
1170 bond->first_slave = new_slave;
1171 } else {
1172 new_slave->next = bond->first_slave;
1173 new_slave->prev = bond->first_slave->prev;
1174 new_slave->next->prev = new_slave;
1175 new_slave->prev->next = new_slave;
1176 }
1177
1178 bond->slave_cnt++;
1179}
1180
1181/*
1182 * This function detaches the slave from the list.
1183 * WARNING: no check is made to verify if the slave effectively
1184 * belongs to <bond>.
1185 * Nothing is freed on return, structures are just unchained.
1186 * If any slave pointer in bond was pointing to <slave>,
1187 * it should be changed by the calling function.
1188 *
1189 * bond->lock held for writing by caller.
1190 */
1191static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1192{
1193 if (slave->next) {
1194 slave->next->prev = slave->prev;
1195 }
1196
1197 if (slave->prev) {
1198 slave->prev->next = slave->next;
1199 }
1200
1201 if (bond->first_slave == slave) { /* slave is the first slave */
1202 if (bond->slave_cnt > 1) { /* there are more slave */
1203 bond->first_slave = slave->next;
1204 } else {
1205 bond->first_slave = NULL; /* slave was the last one */
1206 }
1207 }
1208
1209 slave->next = NULL;
1210 slave->prev = NULL;
1211 bond->slave_cnt--;
1212}
1213
1214/*---------------------------------- IOCTL ----------------------------------*/
1215
4ad072c9
AB		 1216static int bond_sethwaddr(struct net_device *bond_dev,
1217 struct net_device *slave_dev)
1da177e4
LT		 1218{
1219 dprintk("bond_dev=%p\n", bond_dev);
1220 dprintk("slave_dev=%p\n", slave_dev);
1221 dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1222 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1223 return 0;
1224}
1225
7f353bf2
HX		 1226#define BOND_VLAN_FEATURES \
1227 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1228 NETIF_F_HW_VLAN_FILTER)
8531c5ff
AK		 1229
1230/*
8e3babcd 1231 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX		 1232 * feature bits are managed elsewhere, so preserve those feature bits
1233 * on the master device.
8531c5ff
AK		 1234 */
1235static int bond_compute_features(struct bonding *bond)
1236{
8531c5ff
AK		 1237 struct slave *slave;
1238 struct net_device *bond_dev = bond->dev;
7f353bf2 1239 unsigned long features = bond_dev->features;
3158bf7d
MS		 1240 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1241 bond_dev->hard_header_len);
8e3babcd 1242 int i;
8531c5ff 1243
7f353bf2
HX		 1244 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1245 features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
1246 NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1247
54ef3137 1248 bond_for_each_slave(bond, slave, i) {
7f353bf2
HX		 1249 features = netdev_compute_features(features,
1250 slave->dev->features);
54ef3137
JV		 1251 if (slave->dev->hard_header_len > max_hard_header_len)
1252 max_hard_header_len = slave->dev->hard_header_len;
1253 }
8531c5ff 1254
7f353bf2 1255 features |= (bond_dev->features & BOND_VLAN_FEATURES);
8531c5ff 1256 bond_dev->features = features;
54ef3137 1257 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1258
1259 return 0;
1260}
1261
872254dd
MS		 1262
1263static void bond_setup_by_slave(struct net_device *bond_dev,
1264 struct net_device *slave_dev)
1265{
d90a162a
MS		 1266 struct bonding *bond = bond_dev->priv;
1267
872254dd 1268 bond_dev->neigh_setup = slave_dev->neigh_setup;
1284cd3a 1269 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1270
1271 bond_dev->type = slave_dev->type;
1272 bond_dev->hard_header_len = slave_dev->hard_header_len;
1273 bond_dev->addr_len = slave_dev->addr_len;
1274
1275 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1276 slave_dev->addr_len);
d90a162a 1277 bond->setup_by_slave = 1;
872254dd
MS		 1278}
1279
1da177e4 1280/* enslave device <slave> to bond device <master> */
a77b5325 1281int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1282{
1283 struct bonding *bond = bond_dev->priv;
1284 struct slave *new_slave = NULL;
1285 struct dev_mc_list *dmi;
1286 struct sockaddr addr;
1287 int link_reporting;
1288 int old_features = bond_dev->features;
1289 int res = 0;
1290
552709d5 1291 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1292 slave_dev->do_ioctl == NULL) {
1da177e4 1293 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1294 ": %s: Warning: no link monitoring support for %s\n",
1295 bond_dev->name, slave_dev->name);
1da177e4
LT		 1296 }
1297
1298 /* bond must be initialized by bond_open() before enslaving */
1299 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1300 printk(KERN_WARNING DRV_NAME
1301 " %s: master_dev is not up in bond_enslave\n",
1302 bond_dev->name);
1da177e4
LT		 1303 }
1304
1305 /* already enslaved */
1306 if (slave_dev->flags & IFF_SLAVE) {
1307 dprintk("Error, Device was already enslaved\n");
1308 return -EBUSY;
1309 }
1310
1311 /* vlan challenged mutual exclusion */
1312 /* no need to lock since we're protected by rtnl_lock */
1313 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1314 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1315 if (!list_empty(&bond->vlan_list)) {
1316 printk(KERN_ERR DRV_NAME
4e0952c7 1317 ": %s: Error: cannot enslave VLAN "
1da177e4 1318 "challenged slave %s on VLAN enabled "
4e0952c7 1319 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1320 bond_dev->name);
1321 return -EPERM;
1322 } else {
1323 printk(KERN_WARNING DRV_NAME
4e0952c7 1324 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1325 "slave %s. Adding VLANs will be blocked as "
1326 "long as %s is part of bond %s\n",
4e0952c7 1327 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1328 bond_dev->name);
1329 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1330 }
1331 } else {
1332 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1333 if (bond->slave_cnt == 0) {
1334 /* First slave, and it is not VLAN challenged,
1335 * so remove the block of adding VLANs over the bond.
1336 */
1337 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1338 }
1339 }
1340
217df670
JV		 1341 /*
1342 * Old ifenslave binaries are no longer supported. These can
1343 * be identified with moderate accurary by the state of the slave:
1344 * the current ifenslave will set the interface down prior to
1345 * enslaving it; the old ifenslave will not.
1346 */
1347 if ((slave_dev->flags & IFF_UP)) {
1348 printk(KERN_ERR DRV_NAME ": %s is up. "
1349 "This may be due to an out of date ifenslave.\n",
1350 slave_dev->name);
1351 res = -EPERM;
1352 goto err_undo_flags;
1353 }
1da177e4 1354
872254dd
MS		 1355 /* set bonding device ether type by slave - bonding netdevices are
1356 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1357 * there is a need to override some of the type dependent attribs/funcs.
1358 *
1359 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1360 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1361 */
1362 if (bond->slave_cnt == 0) {
1363 if (slave_dev->type != ARPHRD_ETHER)
1364 bond_setup_by_slave(bond_dev, slave_dev);
1365 } else if (bond_dev->type != slave_dev->type) {
1366 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1367 "from other slaves (%d), can not enslave it.\n",
1368 slave_dev->name,
1369 slave_dev->type, bond_dev->type);
1370 res = -EINVAL;
1371 goto err_undo_flags;
1372 }
1373
217df670 1374 if (slave_dev->set_mac_address == NULL) {
2ab82852
MS		 1375 if (bond->slave_cnt == 0) {
1376 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1377 ": %s: Warning: The first slave device "
1378 "specified does not support setting the MAC "
1379 "address. Enabling the fail_over_mac option.",
1380 bond_dev->name);
1381 bond->params.fail_over_mac = 1;
1382 } else if (!bond->params.fail_over_mac) {
2ab82852 1383 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1384 ": %s: Error: The slave device specified "
1385 "does not support setting the MAC address, "
1386 "but fail_over_mac is not enabled.\n"
2ab82852
MS		 1387 , bond_dev->name);
1388 res = -EOPNOTSUPP;
1389 goto err_undo_flags;
1390 }
1da177e4
LT		 1391 }
1392
243cb4e5 1393 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1394 if (!new_slave) {
1395 res = -ENOMEM;
1396 goto err_undo_flags;
1397 }
1398
1da177e4
LT		 1399 /* save slave's original flags before calling
1400 * netdev_set_master and dev_open
1401 */
1402 new_slave->original_flags = slave_dev->flags;
1403
217df670
JV		 1404 /*
1405 * Save slave's original ("permanent") mac address for modes
1406 * that need it, and for restoring it upon release, and then
1407 * set it to the master's address
1408 */
1409 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1410
dd957c57 1411 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1412 /*
1413 * Set slave to master's mac address. The application already
1414 * set the master's mac address to that of the first slave
1415 */
1416 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1417 addr.sa_family = slave_dev->type;
1418 res = dev_set_mac_address(slave_dev, &addr);
1419 if (res) {
1420 dprintk("Error %d calling set_mac_address\n", res);
1421 goto err_free;
1422 }
217df670 1423 }
1da177e4 1424
c2edacf8
JV		 1425 res = netdev_set_master(slave_dev, bond_dev);
1426 if (res) {
1427 dprintk("Error %d calling netdev_set_master\n", res);
1428 goto err_close;
1429 }
217df670
JV		 1430 /* open the slave since the application closed it */
1431 res = dev_open(slave_dev);
1432 if (res) {
1433 dprintk("Openning slave %s failed\n", slave_dev->name);
1434 goto err_restore_mac;
1da177e4
LT		 1435 }
1436
1da177e4 1437 new_slave->dev = slave_dev;
0b680e75 1438 slave_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 1439
1440 if ((bond->params.mode == BOND_MODE_TLB) ||
1441 (bond->params.mode == BOND_MODE_ALB)) {
1442 /* bond_alb_init_slave() must be called before all other stages since
1443 * it might fail and we do not want to have to undo everything
1444 */
1445 res = bond_alb_init_slave(bond, new_slave);
1446 if (res) {
1447 goto err_unset_master;
1448 }
1449 }
1450
1451 /* If the mode USES_PRIMARY, then the new slave gets the
1452 * master's promisc (and mc) settings only if it becomes the
1453 * curr_active_slave, and that is taken care of later when calling
1454 * bond_change_active()
1455 */
1456 if (!USES_PRIMARY(bond->params.mode)) {
1457 /* set promiscuity level to new slave */
1458 if (bond_dev->flags & IFF_PROMISC) {
1459 dev_set_promiscuity(slave_dev, 1);
1460 }
1461
1462 /* set allmulti level to new slave */
1463 if (bond_dev->flags & IFF_ALLMULTI) {
1464 dev_set_allmulti(slave_dev, 1);
1465 }
1466
1467 /* upload master's mc_list to new slave */
1468 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1469 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1470 }
1471 }
1472
1473 if (bond->params.mode == BOND_MODE_8023AD) {
1474 /* add lacpdu mc addr to mc list */
1475 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1476
1477 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1478 }
1479
1480 bond_add_vlans_on_slave(bond, slave_dev);
1481
1482 write_lock_bh(&bond->lock);
1483
1484 bond_attach_slave(bond, new_slave);
1485
1486 new_slave->delay = 0;
1487 new_slave->link_failure_count = 0;
1488
8531c5ff
AK		 1489 bond_compute_features(bond);
1490
f5b2b966
JV		 1491 new_slave->last_arp_rx = jiffies;
1492
1da177e4
LT		 1493 if (bond->params.miimon && !bond->params.use_carrier) {
1494 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1495
1496 if ((link_reporting == -1) && !bond->params.arp_interval) {
1497 /*
1498 * miimon is set but a bonded network driver
1499 * does not support ETHTOOL/MII and
1500 * arp_interval is not set. Note: if
1501 * use_carrier is enabled, we will never go
1502 * here (because netif_carrier is always
1503 * supported); thus, we don't need to change
1504 * the messages for netif_carrier.
1505 */
1506 printk(KERN_WARNING DRV_NAME
4e0952c7 1507 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1508 "available for interface %s, and "
1509 "arp_interval/arp_ip_target module parameters "
1510 "not specified, thus bonding will not detect "
1511 "link failures! see bonding.txt for details.\n",
4e0952c7 1512 bond_dev->name, slave_dev->name);
1da177e4
LT		 1513 } else if (link_reporting == -1) {
1514 /* unable get link status using mii/ethtool */
1515 printk(KERN_WARNING DRV_NAME
4e0952c7 1516 ": %s: Warning: can't get link status from "
1da177e4
LT		 1517 "interface %s; the network driver associated "
1518 "with this interface does not support MII or "
1519 "ETHTOOL link status reporting, thus miimon "
1520 "has no effect on this interface.\n",
4e0952c7 1521 bond_dev->name, slave_dev->name);
1da177e4
LT		 1522 }
1523 }
1524
1525 /* check for initial state */
1526 if (!bond->params.miimon ||
1527 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1528 if (bond->params.updelay) {
1529 dprintk("Initial state of slave_dev is "
1530 "BOND_LINK_BACK\n");
1531 new_slave->link = BOND_LINK_BACK;
1532 new_slave->delay = bond->params.updelay;
1533 } else {
1534 dprintk("Initial state of slave_dev is "
1535 "BOND_LINK_UP\n");
1536 new_slave->link = BOND_LINK_UP;
1537 }
1538 new_slave->jiffies = jiffies;
1539 } else {
1540 dprintk("Initial state of slave_dev is "
1541 "BOND_LINK_DOWN\n");
1542 new_slave->link = BOND_LINK_DOWN;
1543 }
1544
1545 if (bond_update_speed_duplex(new_slave) &&
1546 (new_slave->link != BOND_LINK_DOWN)) {
1547 printk(KERN_WARNING DRV_NAME
4e0952c7 1548 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1549 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1550 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1551
1552 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1553 printk(KERN_WARNING DRV_NAME
1554 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1555 "support in base driver for proper aggregator "
4e0952c7 1556 "selection.\n", bond_dev->name);
1da177e4
LT		 1557 }
1558 }
1559
1560 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1561 /* if there is a primary slave, remember it */
1562 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1563 bond->primary_slave = new_slave;
1564 }
1565 }
1566
1567 switch (bond->params.mode) {
1568 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1569 bond_set_slave_inactive_flags(new_slave);
1570 bond_select_active_slave(bond);
1da177e4
LT		 1571 break;
1572 case BOND_MODE_8023AD:
1573 /* in 802.3ad mode, the internal mechanism
1574 * will activate the slaves in the selected
1575 * aggregator
1576 */
1577 bond_set_slave_inactive_flags(new_slave);
1578 /* if this is the first slave */
1579 if (bond->slave_cnt == 1) {
1580 SLAVE_AD_INFO(new_slave).id = 1;
1581 /* Initialize AD with the number of times that the AD timer is called in 1 second
1582 * can be called only after the mac address of the bond is set
1583 */
1584 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1585 bond->params.lacp_fast);
1586 } else {
1587 SLAVE_AD_INFO(new_slave).id =
1588 SLAVE_AD_INFO(new_slave->prev).id + 1;
1589 }
1590
1591 bond_3ad_bind_slave(new_slave);
1592 break;
1593 case BOND_MODE_TLB:
1594 case BOND_MODE_ALB:
1595 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1596 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1597 break;
1598 default:
1599 dprintk("This slave is always active in trunk mode\n");
1600
1601 /* always active in trunk mode */
1602 new_slave->state = BOND_STATE_ACTIVE;
1603
1604 /* In trunking mode there is little meaning to curr_active_slave
1605 * anyway (it holds no special properties of the bond device),
1606 * so we can change it without calling change_active_interface()
1607 */
1608 if (!bond->curr_active_slave) {
1609 bond->curr_active_slave = new_slave;
1610 }
1611 break;
1612 } /* switch(bond_mode) */
1613
ff59c456
JV		 1614 bond_set_carrier(bond);
1615
1da177e4
LT		 1616 write_unlock_bh(&bond->lock);
1617
b76cdba9
MW		 1618 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1619 if (res)
1620 goto err_unset_master;
1621
1da177e4
LT		 1622 printk(KERN_INFO DRV_NAME
1623 ": %s: enslaving %s as a%s interface with a%s link.\n",
1624 bond_dev->name, slave_dev->name,
1625 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1626 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1627
1628 /* enslave is successful */
1629 return 0;
1630
1631/* Undo stages on error */
1632err_unset_master:
1633 netdev_set_master(slave_dev, NULL);
1634
1635err_close:
1636 dev_close(slave_dev);
1637
1638err_restore_mac:
dd957c57 1639 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1640 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1641 addr.sa_family = slave_dev->type;
1642 dev_set_mac_address(slave_dev, &addr);
1643 }
1da177e4
LT		 1644
1645err_free:
1646 kfree(new_slave);
1647
1648err_undo_flags:
1649 bond_dev->features = old_features;
8531c5ff 1650
1da177e4
LT		 1651 return res;
1652}
1653
1654/*
1655 * Try to release the slave device <slave> from the bond device <master>
1656 * It is legal to access curr_active_slave without a lock because all the function
1657 * is write-locked.
1658 *
1659 * The rules for slave state should be:
1660 * for Active/Backup:
1661 * Active stays on all backups go down
1662 * for Bonded connections:
1663 * The first up interface should be left on and all others downed.
1664 */
a77b5325 1665int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1666{
1667 struct bonding *bond = bond_dev->priv;
1668 struct slave *slave, *oldcurrent;
1669 struct sockaddr addr;
1670 int mac_addr_differ;
0795af57 1671 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1672
1673 /* slave is not a slave or master is not master of this slave */
1674 if (!(slave_dev->flags & IFF_SLAVE) ||
1675 (slave_dev->master != bond_dev)) {
1676 printk(KERN_ERR DRV_NAME
4e0952c7 1677 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1678 bond_dev->name, slave_dev->name);
1679 return -EINVAL;
1680 }
1681
1682 write_lock_bh(&bond->lock);
1683
1684 slave = bond_get_slave_by_dev(bond, slave_dev);
1685 if (!slave) {
1686 /* not a slave of this bond */
1687 printk(KERN_INFO DRV_NAME
1688 ": %s: %s not enslaved\n",
1689 bond_dev->name, slave_dev->name);
f5e2a7b2 1690 write_unlock_bh(&bond->lock);
1da177e4
LT		 1691 return -EINVAL;
1692 }
1693
1694 mac_addr_differ = memcmp(bond_dev->dev_addr,
1695 slave->perm_hwaddr,
1696 ETH_ALEN);
1697 if (!mac_addr_differ && (bond->slave_cnt > 1)) {
1698 printk(KERN_WARNING DRV_NAME
0795af57
JP		 1699 ": %s: Warning: the permanent HWaddr of %s - "
1700 "%s - is still in use by %s. "
1701 "Set the HWaddr of %s to a different address "
1702 "to avoid conflicts.\n",
4e0952c7 1703 bond_dev->name,
1da177e4 1704 slave_dev->name,
0795af57 1705 print_mac(mac, slave->perm_hwaddr),
1da177e4
LT		 1706 bond_dev->name,
1707 slave_dev->name);
1708 }
1709
1710 /* Inform AD package of unbinding of slave. */
1711 if (bond->params.mode == BOND_MODE_8023AD) {
1712 /* must be called before the slave is
1713 * detached from the list
1714 */
1715 bond_3ad_unbind_slave(slave);
1716 }
1717
1718 printk(KERN_INFO DRV_NAME
1719 ": %s: releasing %s interface %s\n",
1720 bond_dev->name,
1721 (slave->state == BOND_STATE_ACTIVE)
1722 ? "active" : "backup",
1723 slave_dev->name);
1724
1725 oldcurrent = bond->curr_active_slave;
1726
1727 bond->current_arp_slave = NULL;
1728
1729 /* release the slave from its bond */
1730 bond_detach_slave(bond, slave);
1731
8531c5ff
AK		 1732 bond_compute_features(bond);
1733
1da177e4
LT		 1734 if (bond->primary_slave == slave) {
1735 bond->primary_slave = NULL;
1736 }
1737
1738 if (oldcurrent == slave) {
1739 bond_change_active_slave(bond, NULL);
1740 }
1741
1742 if ((bond->params.mode == BOND_MODE_TLB) ||
1743 (bond->params.mode == BOND_MODE_ALB)) {
1744 /* Must be called only after the slave has been
1745 * detached from the list and the curr_active_slave
1746 * has been cleared (if our_slave == old_current),
1747 * but before a new active slave is selected.
1748 */
1749 bond_alb_deinit_slave(bond, slave);
1750 }
1751
059fe7a5
JV		 1752 if (oldcurrent == slave) {
1753 /*
1754 * Note that we hold RTNL over this sequence, so there
1755 * is no concern that another slave add/remove event
1756 * will interfere.
1757 */
1758 write_unlock_bh(&bond->lock);
1759 read_lock(&bond->lock);
1760 write_lock_bh(&bond->curr_slave_lock);
1761
1da177e4
LT		 1762 bond_select_active_slave(bond);
1763
059fe7a5
JV		 1764 write_unlock_bh(&bond->curr_slave_lock);
1765 read_unlock(&bond->lock);
1766 write_lock_bh(&bond->lock);
1767 }
1768
1da177e4 1769 if (bond->slave_cnt == 0) {
ff59c456
JV		 1770 bond_set_carrier(bond);
1771
1da177e4
LT		 1772 /* if the last slave was removed, zero the mac address
1773 * of the master so it will be set by the application
1774 * to the mac address of the first slave
1775 */
1776 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1777
1778 if (list_empty(&bond->vlan_list)) {
1779 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1780 } else {
1781 printk(KERN_WARNING DRV_NAME
4e0952c7 1782 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1783 "still has VLANs.\n",
4e0952c7 1784 bond_dev->name, bond_dev->name);
1da177e4 1785 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1786 ": %s: When re-adding slaves, make sure the bond's "
1787 "HW address matches its VLANs'.\n",
1788 bond_dev->name);
1da177e4
LT		 1789 }
1790 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1791 !bond_has_challenged_slaves(bond)) {
1792 printk(KERN_INFO DRV_NAME
4e0952c7 1793 ": %s: last VLAN challenged slave %s "
1da177e4 1794 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1795 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1796 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1797 }
1798
1799 write_unlock_bh(&bond->lock);
1800
b76cdba9
MW		 1801 /* must do this from outside any spinlocks */
1802 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1803
1da177e4
LT		 1804 bond_del_vlans_from_slave(bond, slave_dev);
1805
1806 /* If the mode USES_PRIMARY, then we should only remove its
1807 * promisc and mc settings if it was the curr_active_slave, but that was
1808 * already taken care of above when we detached the slave
1809 */
1810 if (!USES_PRIMARY(bond->params.mode)) {
1811 /* unset promiscuity level from slave */
1812 if (bond_dev->flags & IFF_PROMISC) {
1813 dev_set_promiscuity(slave_dev, -1);
1814 }
1815
1816 /* unset allmulti level from slave */
1817 if (bond_dev->flags & IFF_ALLMULTI) {
1818 dev_set_allmulti(slave_dev, -1);
1819 }
1820
1821 /* flush master's mc_list from slave */
1822 bond_mc_list_flush(bond_dev, slave_dev);
1823 }
1824
1825 netdev_set_master(slave_dev, NULL);
1826
1827 /* close slave before restoring its mac address */
1828 dev_close(slave_dev);
1829
dd957c57 1830 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1831 /* restore original ("permanent") mac address */
1832 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1833 addr.sa_family = slave_dev->type;
1834 dev_set_mac_address(slave_dev, &addr);
1835 }
1da177e4 1836
8f903c70 1837 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1838 IFF_SLAVE_INACTIVE | IFF_BONDING |
1839 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1840
1841 kfree(slave);
1842
1843 return 0; /* deletion OK */
1844}
1845
d90a162a
MS		 1846/*
1847* Destroy a bonding device.
1848* Must be under rtnl_lock when this function is called.
1849*/
1850void bond_destroy(struct bonding *bond)
1851{
1852 bond_deinit(bond->dev);
1853 bond_destroy_sysfs_entry(bond);
8cbdeec6 1854 unregister_netdevice(bond->dev);
d90a162a
MS		 1855}
1856
1857/*
1858* First release a slave and than destroy the bond if no more slaves iare left.
1859* Must be under rtnl_lock when this function is called.
1860*/
1861int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1862{
1863 struct bonding *bond = bond_dev->priv;
1864 int ret;
1865
1866 ret = bond_release(bond_dev, slave_dev);
1867 if ((ret == 0) && (bond->slave_cnt == 0)) {
1868 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1869 bond_dev->name, bond_dev->name);
1870 bond_destroy(bond);
1871 }
1872 return ret;
1873}
1874
1da177e4
LT		 1875/*
1876 * This function releases all slaves.
1877 */
1878static int bond_release_all(struct net_device *bond_dev)
1879{
1880 struct bonding *bond = bond_dev->priv;
1881 struct slave *slave;
1882 struct net_device *slave_dev;
1883 struct sockaddr addr;
1884
1885 write_lock_bh(&bond->lock);
1886
ff59c456
JV		 1887 netif_carrier_off(bond_dev);
1888
1da177e4
LT		 1889 if (bond->slave_cnt == 0) {
1890 goto out;
1891 }
1892
1893 bond->current_arp_slave = NULL;
1894 bond->primary_slave = NULL;
1895 bond_change_active_slave(bond, NULL);
1896
1897 while ((slave = bond->first_slave) != NULL) {
1898 /* Inform AD package of unbinding of slave
1899 * before slave is detached from the list.
1900 */
1901 if (bond->params.mode == BOND_MODE_8023AD) {
1902 bond_3ad_unbind_slave(slave);
1903 }
1904
1905 slave_dev = slave->dev;
1906 bond_detach_slave(bond, slave);
1907
1908 if ((bond->params.mode == BOND_MODE_TLB) ||
1909 (bond->params.mode == BOND_MODE_ALB)) {
1910 /* must be called only after the slave
1911 * has been detached from the list
1912 */
1913 bond_alb_deinit_slave(bond, slave);
1914 }
1915
8531c5ff
AK		 1916 bond_compute_features(bond);
1917
1da177e4
LT		 1918 /* now that the slave is detached, unlock and perform
1919 * all the undo steps that should not be called from
1920 * within a lock.
1921 */
1922 write_unlock_bh(&bond->lock);
1923
b76cdba9 1924 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 1925 bond_del_vlans_from_slave(bond, slave_dev);
1926
1927 /* If the mode USES_PRIMARY, then we should only remove its
1928 * promisc and mc settings if it was the curr_active_slave, but that was
1929 * already taken care of above when we detached the slave
1930 */
1931 if (!USES_PRIMARY(bond->params.mode)) {
1932 /* unset promiscuity level from slave */
1933 if (bond_dev->flags & IFF_PROMISC) {
1934 dev_set_promiscuity(slave_dev, -1);
1935 }
1936
1937 /* unset allmulti level from slave */
1938 if (bond_dev->flags & IFF_ALLMULTI) {
1939 dev_set_allmulti(slave_dev, -1);
1940 }
1941
1942 /* flush master's mc_list from slave */
1943 bond_mc_list_flush(bond_dev, slave_dev);
1944 }
1945
1946 netdev_set_master(slave_dev, NULL);
1947
1948 /* close slave before restoring its mac address */
1949 dev_close(slave_dev);
1950
dd957c57 1951 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1952 /* restore original ("permanent") mac address*/
1953 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1954 addr.sa_family = slave_dev->type;
1955 dev_set_mac_address(slave_dev, &addr);
1956 }
1da177e4 1957
8f903c70
JV		 1958 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1959 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1960
1961 kfree(slave);
1962
1963 /* re-acquire the lock before getting the next slave */
1964 write_lock_bh(&bond->lock);
1965 }
1966
1967 /* zero the mac address of the master so it will be
1968 * set by the application to the mac address of the
1969 * first slave
1970 */
1971 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1972
1973 if (list_empty(&bond->vlan_list)) {
1974 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1975 } else {
1976 printk(KERN_WARNING DRV_NAME
4e0952c7 1977 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1978 "still has VLANs.\n",
4e0952c7 1979 bond_dev->name, bond_dev->name);
1da177e4 1980 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1981 ": %s: When re-adding slaves, make sure the bond's "
1982 "HW address matches its VLANs'.\n",
1983 bond_dev->name);
1da177e4
LT		 1984 }
1985
1986 printk(KERN_INFO DRV_NAME
1987 ": %s: released all slaves\n",
1988 bond_dev->name);
1989
1990out:
1991 write_unlock_bh(&bond->lock);
1992
1993 return 0;
1994}
1995
1996/*
1997 * This function changes the active slave to slave <slave_dev>.
1998 * It returns -EINVAL in the following cases.
1999 * - <slave_dev> is not found in the list.
2000 * - There is not active slave now.
2001 * - <slave_dev> is already active.
2002 * - The link state of <slave_dev> is not BOND_LINK_UP.
2003 * - <slave_dev> is not running.
2004 * In these cases, this fuction does nothing.
2005 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2006 */
2007static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2008{
2009 struct bonding *bond = bond_dev->priv;
2010 struct slave *old_active = NULL;
2011 struct slave *new_active = NULL;
2012 int res = 0;
2013
2014 if (!USES_PRIMARY(bond->params.mode)) {
2015 return -EINVAL;
2016 }
2017
2018 /* Verify that master_dev is indeed the master of slave_dev */
2019 if (!(slave_dev->flags & IFF_SLAVE) ||
2020 (slave_dev->master != bond_dev)) {
2021 return -EINVAL;
2022 }
2023
059fe7a5 2024 read_lock(&bond->lock);
1da177e4 2025
059fe7a5 2026 read_lock(&bond->curr_slave_lock);
1da177e4 2027 old_active = bond->curr_active_slave;
059fe7a5
JV		 2028 read_unlock(&bond->curr_slave_lock);
2029
1da177e4
LT		 2030 new_active = bond_get_slave_by_dev(bond, slave_dev);
2031
2032 /*
2033 * Changing to the current active: do nothing; return success.
2034 */
2035 if (new_active && (new_active == old_active)) {
059fe7a5 2036 read_unlock(&bond->lock);
1da177e4
LT		 2037 return 0;
2038 }
2039
2040 if ((new_active) &&
2041 (old_active) &&
2042 (new_active->link == BOND_LINK_UP) &&
2043 IS_UP(new_active->dev)) {
059fe7a5 2044 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2045 bond_change_active_slave(bond, new_active);
059fe7a5 2046 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2047 } else {
2048 res = -EINVAL;
2049 }
2050
059fe7a5 2051 read_unlock(&bond->lock);
1da177e4
LT		 2052
2053 return res;
2054}
2055
1da177e4
LT		 2056static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2057{
2058 struct bonding *bond = bond_dev->priv;
2059
2060 info->bond_mode = bond->params.mode;
2061 info->miimon = bond->params.miimon;
2062
6603a6f2 2063 read_lock(&bond->lock);
1da177e4 2064 info->num_slaves = bond->slave_cnt;
6603a6f2 2065 read_unlock(&bond->lock);
1da177e4
LT		 2066
2067 return 0;
2068}
2069
2070static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2071{
2072 struct bonding *bond = bond_dev->priv;
2073 struct slave *slave;
2074 int i, found = 0;
2075
2076 if (info->slave_id < 0) {
2077 return -ENODEV;
2078 }
2079
6603a6f2 2080 read_lock(&bond->lock);
1da177e4
LT		 2081
2082 bond_for_each_slave(bond, slave, i) {
2083 if (i == (int)info->slave_id) {
2084 found = 1;
2085 break;
2086 }
2087 }
2088
6603a6f2 2089 read_unlock(&bond->lock);
1da177e4
LT		 2090
2091 if (found) {
2092 strcpy(info->slave_name, slave->dev->name);
2093 info->link = slave->link;
2094 info->state = slave->state;
2095 info->link_failure_count = slave->link_failure_count;
2096 } else {
2097 return -ENODEV;
2098 }
2099
2100 return 0;
2101}
2102
2103/*-------------------------------- Monitoring -------------------------------*/
2104
0b0eef66
JV		 2105/*
2106 * if !have_locks, return nonzero if a failover is necessary. if
2107 * have_locks, do whatever failover activities are needed.
2108 *
2109 * This is to separate the inspection and failover steps for locking
2110 * purposes; failover requires rtnl, but acquiring it for every
2111 * inspection is undesirable, so a wrapper first does inspection, and
2112 * the acquires the necessary locks and calls again to perform
2113 * failover if needed. Since all locks are dropped, a complete
2114 * restart is needed between calls.
2115 */
2116static int __bond_mii_monitor(struct bonding *bond, int have_locks)
1da177e4 2117{
1da177e4
LT		 2118 struct slave *slave, *oldcurrent;
2119 int do_failover = 0;
1da177e4
LT		 2120 int i;
2121
0b0eef66 2122 if (bond->slave_cnt == 0)
1da177e4 2123 goto out;
1da177e4
LT		 2124
2125 /* we will try to read the link status of each of our slaves, and
2126 * set their IFF_RUNNING flag appropriately. For each slave not
2127 * supporting MII status, we won't do anything so that a user-space
2128 * program could monitor the link itself if needed.
2129 */
2130
1053f62c
MS		 2131 if (bond->send_grat_arp) {
2132 if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
2133 &bond->curr_active_slave->dev->state))
2134 dprintk("Needs to send gratuitous arp but not yet\n");
2135 else {
2136 dprintk("sending delayed gratuitous arp on on %s\n",
2137 bond->curr_active_slave->dev->name);
2138 bond_send_gratuitous_arp(bond);
2139 bond->send_grat_arp = 0;
2140 }
2141 }
1da177e4
LT		 2142 read_lock(&bond->curr_slave_lock);
2143 oldcurrent = bond->curr_active_slave;
2144 read_unlock(&bond->curr_slave_lock);
2145
2146 bond_for_each_slave(bond, slave, i) {
2147 struct net_device *slave_dev = slave->dev;
2148 int link_state;
2149 u16 old_speed = slave->speed;
2150 u8 old_duplex = slave->duplex;
2151
2152 link_state = bond_check_dev_link(bond, slave_dev, 0);
2153
2154 switch (slave->link) {
2155 case BOND_LINK_UP: /* the link was up */
2156 if (link_state == BMSR_LSTATUS) {
059fe7a5
JV		 2157 if (!oldcurrent) {
2158 if (!have_locks)
2159 return 1;
2160 do_failover = 1;
2161 }
1da177e4
LT		 2162 break;
2163 } else { /* link going down */
2164 slave->link = BOND_LINK_FAIL;
2165 slave->delay = bond->params.downdelay;
2166
2167 if (slave->link_failure_count < UINT_MAX) {
2168 slave->link_failure_count++;
2169 }
2170
2171 if (bond->params.downdelay) {
2172 printk(KERN_INFO DRV_NAME
2173 ": %s: link status down for %s "
2174 "interface %s, disabling it in "
2175 "%d ms.\n",
1b76b316 2176 bond->dev->name,
1da177e4
LT		 2177 IS_UP(slave_dev)
2178 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2179 ? ((slave == oldcurrent)
2180 ? "active " : "backup ")
2181 : "")
2182 : "idle ",
2183 slave_dev->name,
2184 bond->params.downdelay * bond->params.miimon);
2185 }
2186 }
2187 /* no break ! fall through the BOND_LINK_FAIL test to
2188 ensure proper action to be taken
2189 */
2190 case BOND_LINK_FAIL: /* the link has just gone down */
2191 if (link_state != BMSR_LSTATUS) {
2192 /* link stays down */
2193 if (slave->delay <= 0) {
0b0eef66
JV		 2194 if (!have_locks)
2195 return 1;
2196
1da177e4
LT		 2197 /* link down for too long time */
2198 slave->link = BOND_LINK_DOWN;
2199
2200 /* in active/backup mode, we must
2201 * completely disable this interface
2202 */
2203 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2204 (bond->params.mode == BOND_MODE_8023AD)) {
2205 bond_set_slave_inactive_flags(slave);
2206 }
2207
2208 printk(KERN_INFO DRV_NAME
2209 ": %s: link status definitely "
2210 "down for interface %s, "
2211 "disabling it\n",
1b76b316 2212 bond->dev->name,
1da177e4
LT		 2213 slave_dev->name);
2214
2215 /* notify ad that the link status has changed */
2216 if (bond->params.mode == BOND_MODE_8023AD) {
2217 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2218 }
2219
2220 if ((bond->params.mode == BOND_MODE_TLB) ||
2221 (bond->params.mode == BOND_MODE_ALB)) {
2222 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2223 }
2224
2225 if (slave == oldcurrent) {
2226 do_failover = 1;
2227 }
2228 } else {
2229 slave->delay--;
2230 }
2231 } else {
2232 /* link up again */
2233 slave->link = BOND_LINK_UP;
2234 slave->jiffies = jiffies;
2235 printk(KERN_INFO DRV_NAME
2236 ": %s: link status up again after %d "
2237 "ms for interface %s.\n",
1b76b316 2238 bond->dev->name,
1da177e4
LT		 2239 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2240 slave_dev->name);
2241 }
2242 break;
2243 case BOND_LINK_DOWN: /* the link was down */
2244 if (link_state != BMSR_LSTATUS) {
2245 /* the link stays down, nothing more to do */
2246 break;
2247 } else { /* link going up */
2248 slave->link = BOND_LINK_BACK;
2249 slave->delay = bond->params.updelay;
2250
2251 if (bond->params.updelay) {
2252 /* if updelay == 0, no need to
2253 advertise about a 0 ms delay */
2254 printk(KERN_INFO DRV_NAME
2255 ": %s: link status up for "
2256 "interface %s, enabling it "
2257 "in %d ms.\n",
1b76b316 2258 bond->dev->name,
1da177e4
LT		 2259 slave_dev->name,
2260 bond->params.updelay * bond->params.miimon);
2261 }
2262 }
2263 /* no break ! fall through the BOND_LINK_BACK state in
2264 case there's something to do.
2265 */
2266 case BOND_LINK_BACK: /* the link has just come back */
2267 if (link_state != BMSR_LSTATUS) {
2268 /* link down again */
2269 slave->link = BOND_LINK_DOWN;
2270
2271 printk(KERN_INFO DRV_NAME
2272 ": %s: link status down again after %d "
2273 "ms for interface %s.\n",
1b76b316 2274 bond->dev->name,
1da177e4
LT		 2275 (bond->params.updelay - slave->delay) * bond->params.miimon,
2276 slave_dev->name);
2277 } else {
2278 /* link stays up */
2279 if (slave->delay == 0) {
0b0eef66
JV		 2280 if (!have_locks)
2281 return 1;
2282
1da177e4
LT		 2283 /* now the link has been up for long time enough */
2284 slave->link = BOND_LINK_UP;
2285 slave->jiffies = jiffies;
2286
2287 if (bond->params.mode == BOND_MODE_8023AD) {
2288 /* prevent it from being the active one */
2289 slave->state = BOND_STATE_BACKUP;
2290 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2291 /* make it immediately active */
2292 slave->state = BOND_STATE_ACTIVE;
2293 } else if (slave != bond->primary_slave) {
2294 /* prevent it from being the active one */
2295 slave->state = BOND_STATE_BACKUP;
2296 }
2297
2298 printk(KERN_INFO DRV_NAME
2299 ": %s: link status definitely "
2300 "up for interface %s.\n",
1b76b316 2301 bond->dev->name,
1da177e4
LT		 2302 slave_dev->name);
2303
2304 /* notify ad that the link status has changed */
2305 if (bond->params.mode == BOND_MODE_8023AD) {
2306 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2307 }
2308
2309 if ((bond->params.mode == BOND_MODE_TLB) ||
2310 (bond->params.mode == BOND_MODE_ALB)) {
2311 bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
2312 }
2313
2314 if ((!oldcurrent) ||
2315 (slave == bond->primary_slave)) {
2316 do_failover = 1;
2317 }
2318 } else {
2319 slave->delay--;
2320 }
2321 }
2322 break;
2323 default:
2324 /* Should not happen */
4e0952c7
MW		 2325 printk(KERN_ERR DRV_NAME
2326 ": %s: Error: %s Illegal value (link=%d)\n",
1b76b316 2327 bond->dev->name,
4e0952c7
MW		 2328 slave->dev->name,
2329 slave->link);
1da177e4
LT		 2330 goto out;
2331 } /* end of switch (slave->link) */
2332
2333 bond_update_speed_duplex(slave);
2334
2335 if (bond->params.mode == BOND_MODE_8023AD) {
2336 if (old_speed != slave->speed) {
2337 bond_3ad_adapter_speed_changed(slave);
2338 }
2339
2340 if (old_duplex != slave->duplex) {
2341 bond_3ad_adapter_duplex_changed(slave);
2342 }
2343 }
2344
2345 } /* end of for */
2346
2347 if (do_failover) {
059fe7a5
JV		 2348 ASSERT_RTNL();
2349
2350 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2351
2352 bond_select_active_slave(bond);
2353
059fe7a5
JV		 2354 write_unlock_bh(&bond->curr_slave_lock);
2355
ff59c456
JV		 2356 } else
2357 bond_set_carrier(bond);
1da177e4 2358
1da177e4 2359out:
0b0eef66 2360 return 0;
1da177e4
LT		 2361}
2362
0b0eef66
JV		 2363/*
2364 * bond_mii_monitor
2365 *
2366 * Really a wrapper that splits the mii monitor into two phases: an
2367 * inspection, then (if inspection indicates something needs to be
2368 * done) an acquisition of appropriate locks followed by another pass
2369 * to implement whatever link state changes are indicated.
2370 */
2371void bond_mii_monitor(struct work_struct *work)
2372{
2373 struct bonding *bond = container_of(work, struct bonding,
2374 mii_work.work);
2375 unsigned long delay;
2376
2377 read_lock(&bond->lock);
2378 if (bond->kill_timers) {
2379 read_unlock(&bond->lock);
2380 return;
2381 }
2382 if (__bond_mii_monitor(bond, 0)) {
2383 read_unlock(&bond->lock);
2384 rtnl_lock();
2385 read_lock(&bond->lock);
2386 __bond_mii_monitor(bond, 1);
2387 rtnl_unlock();
2388 }
2389
2390 delay = ((bond->params.miimon * HZ) / 1000) ? : 1;
2391 read_unlock(&bond->lock);
2392 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2393}
c3ade5ca 2394
d3bb52b0 2395static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2396{
2397 struct in_device *idev;
2398 struct in_ifaddr *ifa;
a144ea4b 2399 __be32 addr = 0;
c3ade5ca
JV		 2400
2401 if (!dev)
2402 return 0;
2403
2404 rcu_read_lock();
e5ed6399 2405 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2406 if (!idev)
2407 goto out;
2408
2409 ifa = idev->ifa_list;
2410 if (!ifa)
2411 goto out;
2412
2413 addr = ifa->ifa_local;
2414out:
2415 rcu_read_unlock();
2416 return addr;
2417}
2418
2419static int bond_has_ip(struct bonding *bond)
2420{
2421 struct vlan_entry *vlan, *vlan_next;
2422
2423 if (bond->master_ip)
2424 return 1;
2425
2426 if (list_empty(&bond->vlan_list))
2427 return 0;
2428
2429 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2430 vlan_list) {
2431 if (vlan->vlan_ip)
2432 return 1;
2433 }
2434
2435 return 0;
2436}
2437
d3bb52b0 2438static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966
JV		 2439{
2440 struct vlan_entry *vlan, *vlan_next;
2441
2442 if (ip == bond->master_ip)
2443 return 1;
2444
2445 if (list_empty(&bond->vlan_list))
2446 return 0;
2447
2448 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2449 vlan_list) {
2450 if (ip == vlan->vlan_ip)
2451 return 1;
2452 }
2453
2454 return 0;
2455}
2456
c3ade5ca
JV		 2457/*
2458 * We go to the (large) trouble of VLAN tagging ARP frames because
2459 * switches in VLAN mode (especially if ports are configured as
2460 * "native" to a VLAN) might not pass non-tagged frames.
2461 */
d3bb52b0 2462static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2463{
2464 struct sk_buff *skb;
2465
2466 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2467 slave_dev->name, dest_ip, src_ip, vlan_id);
2468
2469 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2470 NULL, slave_dev->dev_addr, NULL);
2471
2472 if (!skb) {
2473 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2474 return;
2475 }
2476 if (vlan_id) {
2477 skb = vlan_put_tag(skb, vlan_id);
2478 if (!skb) {
2479 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2480 return;
2481 }
2482 }
2483 arp_xmit(skb);
2484}
2485
2486
1da177e4
LT		 2487static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2488{
c3ade5ca 2489 int i, vlan_id, rv;
d3bb52b0 2490 __be32 *targets = bond->params.arp_targets;
c3ade5ca
JV		 2491 struct vlan_entry *vlan, *vlan_next;
2492 struct net_device *vlan_dev;
2493 struct flowi fl;
2494 struct rtable *rt;
1da177e4 2495
6b780567
MW		 2496 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2497 if (!targets[i])
2498 continue;
c3ade5ca
JV		 2499 dprintk("basa: target %x\n", targets[i]);
2500 if (list_empty(&bond->vlan_list)) {
2501 dprintk("basa: empty vlan: arp_send\n");
2502 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2503 bond->master_ip, 0);
2504 continue;
2505 }
2506
2507 /*
2508 * If VLANs are configured, we do a route lookup to
2509 * determine which VLAN interface would be used, so we
2510 * can tag the ARP with the proper VLAN tag.
2511 */
2512 memset(&fl, 0, sizeof(fl));
2513 fl.fl4_dst = targets[i];
2514 fl.fl4_tos = RTO_ONLINK;
2515
2516 rv = ip_route_output_key(&rt, &fl);
2517 if (rv) {
2518 if (net_ratelimit()) {
2519 printk(KERN_WARNING DRV_NAME
2520 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2521 bond->dev->name, NIPQUAD(fl.fl4_dst));
2522 }
2523 continue;
2524 }
2525
2526 /*
2527 * This target is not on a VLAN
2528 */
2529 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2530 ip_rt_put(rt);
c3ade5ca
JV		 2531 dprintk("basa: rtdev == bond->dev: arp_send\n");
2532 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2533 bond->master_ip, 0);
2534 continue;
2535 }
2536
2537 vlan_id = 0;
2538 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2539 vlan_list) {
5c15bdec 2540 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2541 if (vlan_dev == rt->u.dst.dev) {
2542 vlan_id = vlan->vlan_id;
2543 dprintk("basa: vlan match on %s %d\n",
2544 vlan_dev->name, vlan_id);
2545 break;
2546 }
2547 }
2548
2549 if (vlan_id) {
ed4b9f80 2550 ip_rt_put(rt);
c3ade5ca
JV		 2551 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2552 vlan->vlan_ip, vlan_id);
2553 continue;
2554 }
2555
2556 if (net_ratelimit()) {
2557 printk(KERN_WARNING DRV_NAME
2558 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2559 bond->dev->name, NIPQUAD(fl.fl4_dst),
2560 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2561 }
ed4b9f80 2562 ip_rt_put(rt);
c3ade5ca
JV		 2563 }
2564}
2565
2566/*
2567 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2568 * for each VLAN above us.
2569 */
2570static void bond_send_gratuitous_arp(struct bonding *bond)
2571{
2572 struct slave *slave = bond->curr_active_slave;
2573 struct vlan_entry *vlan;
2574 struct net_device *vlan_dev;
2575
2576 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2577 slave ? slave->dev->name : "NULL");
2578 if (!slave)
2579 return;
2580
2581 if (bond->master_ip) {
2582 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2583 bond->master_ip, 0);
c3ade5ca
JV		 2584 }
2585
2586 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2587 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2588 if (vlan->vlan_ip) {
2589 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2590 vlan->vlan_ip, vlan->vlan_id);
2591 }
1da177e4
LT		 2592 }
2593}
2594
d3bb52b0 2595static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2596{
2597 int i;
d3bb52b0 2598 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2599
2600 targets = bond->params.arp_targets;
2601 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2602 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2603 "%u.%u.%u.%u bhti(tip) %d\n",
2604 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2605 bond_has_this_ip(bond, tip));
2606 if (sip == targets[i]) {
2607 if (bond_has_this_ip(bond, tip))
2608 slave->last_arp_rx = jiffies;
2609 return;
2610 }
2611 }
2612}
2613
2614static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2615{
2616 struct arphdr *arp;
2617 struct slave *slave;
2618 struct bonding *bond;
2619 unsigned char *arp_ptr;
d3bb52b0 2620 __be32 sip, tip;
f5b2b966 2621
e730c155
EB		 2622 if (dev->nd_net != &init_net)
2623 goto out;
2624
f5b2b966
JV		 2625 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2626 goto out;
2627
2628 bond = dev->priv;
2629 read_lock(&bond->lock);
2630
2631 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2632 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2633 orig_dev ? orig_dev->name : "NULL");
2634
2635 slave = bond_get_slave_by_dev(bond, orig_dev);
2636 if (!slave || !slave_do_arp_validate(bond, slave))
2637 goto out_unlock;
2638
2639 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2640 if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
2641 (2 * dev->addr_len) +
2642 (2 * sizeof(u32)))))
2643 goto out_unlock;
2644
d0a92be0 2645 arp = arp_hdr(skb);
f5b2b966
JV		 2646 if (arp->ar_hln != dev->addr_len ||
2647 skb->pkt_type == PACKET_OTHERHOST ||
2648 skb->pkt_type == PACKET_LOOPBACK ||
2649 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2650 arp->ar_pro != htons(ETH_P_IP) ||
2651 arp->ar_pln != 4)
2652 goto out_unlock;
2653
2654 arp_ptr = (unsigned char *)(arp + 1);
2655 arp_ptr += dev->addr_len;
2656 memcpy(&sip, arp_ptr, 4);
2657 arp_ptr += 4 + dev->addr_len;
2658 memcpy(&tip, arp_ptr, 4);
2659
2660 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2661 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2662 slave->state, bond->params.arp_validate,
2663 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2664
2665 /*
2666 * Backup slaves won't see the ARP reply, but do come through
2667 * here for each ARP probe (so we swap the sip/tip to validate
2668 * the probe). In a "redundant switch, common router" type of
2669 * configuration, the ARP probe will (hopefully) travel from
2670 * the active, through one switch, the router, then the other
2671 * switch before reaching the backup.
2672 */
2673 if (slave->state == BOND_STATE_ACTIVE)
2674 bond_validate_arp(bond, slave, sip, tip);
2675 else
2676 bond_validate_arp(bond, slave, tip, sip);
2677
2678out_unlock:
2679 read_unlock(&bond->lock);
2680out:
2681 dev_kfree_skb(skb);
2682 return NET_RX_SUCCESS;
2683}
2684
1da177e4
LT		 2685/*
2686 * this function is called regularly to monitor each slave's link
2687 * ensuring that traffic is being sent and received when arp monitoring
2688 * is used in load-balancing mode. if the adapter has been dormant, then an
2689 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2690 * arp monitoring in active backup mode.
2691 */
1b76b316 2692void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2693{
1b76b316
JV		 2694 struct bonding *bond = container_of(work, struct bonding,
2695 arp_work.work);
1da177e4
LT		 2696 struct slave *slave, *oldcurrent;
2697 int do_failover = 0;
2698 int delta_in_ticks;
2699 int i;
2700
2701 read_lock(&bond->lock);
2702
2703 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2704
2705 if (bond->kill_timers) {
2706 goto out;
2707 }
2708
2709 if (bond->slave_cnt == 0) {
2710 goto re_arm;
2711 }
2712
2713 read_lock(&bond->curr_slave_lock);
2714 oldcurrent = bond->curr_active_slave;
2715 read_unlock(&bond->curr_slave_lock);
2716
2717 /* see if any of the previous devices are up now (i.e. they have
2718 * xmt and rcv traffic). the curr_active_slave does not come into
2719 * the picture unless it is null. also, slave->jiffies is not needed
2720 * here because we send an arp on each slave and give a slave as
2721 * long as it needs to get the tx/rx within the delta.
2722 * TODO: what about up/down delay in arp mode? it wasn't here before
2723 * so it can wait
2724 */
2725 bond_for_each_slave(bond, slave, i) {
2726 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2727 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2728 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2729
2730 slave->link = BOND_LINK_UP;
2731 slave->state = BOND_STATE_ACTIVE;
2732
2733 /* primary_slave has no meaning in round-robin
2734 * mode. the window of a slave being up and
2735 * curr_active_slave being null after enslaving
2736 * is closed.
2737 */
2738 if (!oldcurrent) {
2739 printk(KERN_INFO DRV_NAME
2740 ": %s: link status definitely "
2741 "up for interface %s, ",
1b76b316 2742 bond->dev->name,
1da177e4
LT		 2743 slave->dev->name);
2744 do_failover = 1;
2745 } else {
2746 printk(KERN_INFO DRV_NAME
2747 ": %s: interface %s is now up\n",
1b76b316 2748 bond->dev->name,
1da177e4
LT		 2749 slave->dev->name);
2750 }
2751 }
2752 } else {
2753 /* slave->link == BOND_LINK_UP */
2754
2755 /* not all switches will respond to an arp request
2756 * when the source ip is 0, so don't take the link down
2757 * if we don't know our ip yet
2758 */
b63bb739
DS		 2759 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
2760 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks) &&
c3ade5ca 2761 bond_has_ip(bond))) {
1da177e4
LT		 2762
2763 slave->link = BOND_LINK_DOWN;
2764 slave->state = BOND_STATE_BACKUP;
2765
2766 if (slave->link_failure_count < UINT_MAX) {
2767 slave->link_failure_count++;
2768 }
2769
2770 printk(KERN_INFO DRV_NAME
2771 ": %s: interface %s is now down.\n",
1b76b316 2772 bond->dev->name,
1da177e4
LT		 2773 slave->dev->name);
2774
2775 if (slave == oldcurrent) {
2776 do_failover = 1;
2777 }
2778 }
2779 }
2780
2781 /* note: if switch is in round-robin mode, all links
2782 * must tx arp to ensure all links rx an arp - otherwise
2783 * links may oscillate or not come up at all; if switch is
2784 * in something like xor mode, there is nothing we can
2785 * do - all replies will be rx'ed on same link causing slaves
2786 * to be unstable during low/no traffic periods
2787 */
2788 if (IS_UP(slave->dev)) {
2789 bond_arp_send_all(bond, slave);
2790 }
2791 }
2792
2793 if (do_failover) {
059fe7a5
JV		 2794 rtnl_lock();
2795 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2796
2797 bond_select_active_slave(bond);
2798
059fe7a5
JV		 2799 write_unlock_bh(&bond->curr_slave_lock);
2800 rtnl_unlock();
2801
1da177e4
LT		 2802 }
2803
2804re_arm:
1b76b316
JV		 2805 if (bond->params.arp_interval)
2806 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2807out:
2808 read_unlock(&bond->lock);
2809}
2810
2811/*
2812 * When using arp monitoring in active-backup mode, this function is
2813 * called to determine if any backup slaves have went down or a new
2814 * current slave needs to be found.
2815 * The backup slaves never generate traffic, they are considered up by merely
2816 * receiving traffic. If the current slave goes down, each backup slave will
2817 * be given the opportunity to tx/rx an arp before being taken down - this
2818 * prevents all slaves from being taken down due to the current slave not
2819 * sending any traffic for the backups to receive. The arps are not necessarily
2820 * necessary, any tx and rx traffic will keep the current slave up. While any
2821 * rx traffic will keep the backup slaves up, the current slave is responsible
2822 * for generating traffic to keep them up regardless of any other traffic they
2823 * may have received.
2824 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2825 */
1b76b316 2826void bond_activebackup_arp_mon(struct work_struct *work)
1da177e4 2827{
1b76b316
JV		 2828 struct bonding *bond = container_of(work, struct bonding,
2829 arp_work.work);
1da177e4
LT		 2830 struct slave *slave;
2831 int delta_in_ticks;
2832 int i;
2833
2834 read_lock(&bond->lock);
2835
2836 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2837
2838 if (bond->kill_timers) {
2839 goto out;
2840 }
2841
2842 if (bond->slave_cnt == 0) {
2843 goto re_arm;
2844 }
2845
2846 /* determine if any slave has come up or any backup slave has
2847 * gone down
2848 * TODO: what about up/down delay in arp mode? it wasn't here before
2849 * so it can wait
2850 */
2851 bond_for_each_slave(bond, slave, i) {
2852 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2853 if (time_before_eq(jiffies,
2854 slave_last_rx(bond, slave) + delta_in_ticks)) {
1da177e4
LT		 2855
2856 slave->link = BOND_LINK_UP;
2857
059fe7a5
JV		 2858 rtnl_lock();
2859
2860 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2861
2862 if ((!bond->curr_active_slave) &&
b63bb739 2863 time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks)) {
1da177e4
LT		 2864 bond_change_active_slave(bond, slave);
2865 bond->current_arp_slave = NULL;
2866 } else if (bond->curr_active_slave != slave) {
2867 /* this slave has just come up but we
2868 * already have a current slave; this
2869 * can also happen if bond_enslave adds
2870 * a new slave that is up while we are
2871 * searching for a new slave
2872 */
2873 bond_set_slave_inactive_flags(slave);
2874 bond->current_arp_slave = NULL;
2875 }
2876
ff59c456
JV		 2877 bond_set_carrier(bond);
2878
1da177e4
LT		 2879 if (slave == bond->curr_active_slave) {
2880 printk(KERN_INFO DRV_NAME
2881 ": %s: %s is up and now the "
2882 "active interface\n",
1b76b316 2883 bond->dev->name,
1da177e4 2884 slave->dev->name);
ff59c456 2885 netif_carrier_on(bond->dev);
1da177e4
LT		 2886 } else {
2887 printk(KERN_INFO DRV_NAME
2888 ": %s: backup interface %s is "
2889 "now up\n",
1b76b316 2890 bond->dev->name,
1da177e4
LT		 2891 slave->dev->name);
2892 }
2893
059fe7a5
JV		 2894 write_unlock_bh(&bond->curr_slave_lock);
2895 rtnl_unlock();
1da177e4
LT		 2896 }
2897 } else {
2898 read_lock(&bond->curr_slave_lock);
2899
2900 if ((slave != bond->curr_active_slave) &&
2901 (!bond->current_arp_slave) &&
b63bb739 2902 (time_after_eq(jiffies, slave_last_rx(bond, slave) + 3*delta_in_ticks) &&
c3ade5ca 2903 bond_has_ip(bond))) {
1da177e4
LT		 2904 /* a backup slave has gone down; three times
2905 * the delta allows the current slave to be
2906 * taken out before the backup slave.
2907 * note: a non-null current_arp_slave indicates
2908 * the curr_active_slave went down and we are
2909 * searching for a new one; under this
2910 * condition we only take the curr_active_slave
2911 * down - this gives each slave a chance to
2912 * tx/rx traffic before being taken out
2913 */
2914
2915 read_unlock(&bond->curr_slave_lock);
2916
2917 slave->link = BOND_LINK_DOWN;
2918
2919 if (slave->link_failure_count < UINT_MAX) {
2920 slave->link_failure_count++;
2921 }
2922
2923 bond_set_slave_inactive_flags(slave);
2924
2925 printk(KERN_INFO DRV_NAME
2926 ": %s: backup interface %s is now down\n",
1b76b316 2927 bond->dev->name,
1da177e4
LT		 2928 slave->dev->name);
2929 } else {
2930 read_unlock(&bond->curr_slave_lock);
2931 }
2932 }
2933 }
2934
2935 read_lock(&bond->curr_slave_lock);
2936 slave = bond->curr_active_slave;
2937 read_unlock(&bond->curr_slave_lock);
2938
2939 if (slave) {
2940 /* if we have sent traffic in the past 2*arp_intervals but
2941 * haven't xmit and rx traffic in that time interval, select
2942 * a different slave. slave->jiffies is only updated when
2943 * a slave first becomes the curr_active_slave - not necessarily
2944 * after every arp; this ensures the slave has a full 2*delta
2945 * before being taken out. if a primary is being used, check
2946 * if it is up and needs to take over as the curr_active_slave
2947 */
b63bb739
DS		 2948 if ((time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
2949 (time_after_eq(jiffies, slave_last_rx(bond, slave) + 2*delta_in_ticks) &&
2950 bond_has_ip(bond))) &&
2951 time_after_eq(jiffies, slave->jiffies + 2*delta_in_ticks)) {
1da177e4
LT		 2952
2953 slave->link = BOND_LINK_DOWN;
2954
2955 if (slave->link_failure_count < UINT_MAX) {
2956 slave->link_failure_count++;
2957 }
2958
2959 printk(KERN_INFO DRV_NAME
2960 ": %s: link status down for active interface "
2961 "%s, disabling it\n",
1b76b316 2962 bond->dev->name,
1da177e4
LT		 2963 slave->dev->name);
2964
059fe7a5
JV		 2965 rtnl_lock();
2966 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2967
2968 bond_select_active_slave(bond);
2969 slave = bond->curr_active_slave;
2970
059fe7a5
JV		 2971 write_unlock_bh(&bond->curr_slave_lock);
2972
2973 rtnl_unlock();
1da177e4
LT		 2974
2975 bond->current_arp_slave = slave;
2976
2977 if (slave) {
2978 slave->jiffies = jiffies;
2979 }
2980 } else if ((bond->primary_slave) &&
2981 (bond->primary_slave != slave) &&
2982 (bond->primary_slave->link == BOND_LINK_UP)) {
2983 /* at this point, slave is the curr_active_slave */
2984 printk(KERN_INFO DRV_NAME
2985 ": %s: changing from interface %s to primary "
2986 "interface %s\n",
1b76b316 2987 bond->dev->name,
1da177e4
LT		 2988 slave->dev->name,
2989 bond->primary_slave->dev->name);
2990
2991 /* primary is up so switch to it */
059fe7a5
JV		 2992 rtnl_lock();
2993 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2994 bond_change_active_slave(bond, bond->primary_slave);
059fe7a5
JV		 2995 write_unlock_bh(&bond->curr_slave_lock);
2996
2997 rtnl_unlock();
1da177e4
LT		 2998
2999 slave = bond->primary_slave;
3000 slave->jiffies = jiffies;
3001 } else {
3002 bond->current_arp_slave = NULL;
3003 }
3004
3005 /* the current slave must tx an arp to ensure backup slaves
3006 * rx traffic
3007 */
c3ade5ca 3008 if (slave && bond_has_ip(bond)) {
1da177e4
LT		 3009 bond_arp_send_all(bond, slave);
3010 }
3011 }
3012
3013 /* if we don't have a curr_active_slave, search for the next available
3014 * backup slave from the current_arp_slave and make it the candidate
3015 * for becoming the curr_active_slave
3016 */
3017 if (!slave) {
3018 if (!bond->current_arp_slave) {
3019 bond->current_arp_slave = bond->first_slave;
3020 }
3021
3022 if (bond->current_arp_slave) {
3023 bond_set_slave_inactive_flags(bond->current_arp_slave);
3024
3025 /* search for next candidate */
2f872f04 3026 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
1da177e4
LT		 3027 if (IS_UP(slave->dev)) {
3028 slave->link = BOND_LINK_BACK;
3029 bond_set_slave_active_flags(slave);
3030 bond_arp_send_all(bond, slave);
3031 slave->jiffies = jiffies;
3032 bond->current_arp_slave = slave;
3033 break;
3034 }
3035
3036 /* if the link state is up at this point, we
3037 * mark it down - this can happen if we have
3038 * simultaneous link failures and
3039 * reselect_active_interface doesn't make this
3040 * one the current slave so it is still marked
3041 * up when it is actually down
3042 */
3043 if (slave->link == BOND_LINK_UP) {
3044 slave->link = BOND_LINK_DOWN;
3045 if (slave->link_failure_count < UINT_MAX) {
3046 slave->link_failure_count++;
3047 }
3048
3049 bond_set_slave_inactive_flags(slave);
3050
3051 printk(KERN_INFO DRV_NAME
3052 ": %s: backup interface %s is "
3053 "now down.\n",
1b76b316 3054 bond->dev->name,
1da177e4
LT		 3055 slave->dev->name);
3056 }
3057 }
3058 }
3059 }
3060
3061re_arm:
3062 if (bond->params.arp_interval) {
1b76b316 3063 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3064 }
3065out:
3066 read_unlock(&bond->lock);
3067}
3068
3069/*------------------------------ proc/seq_file-------------------------------*/
3070
3071#ifdef CONFIG_PROC_FS
3072
3073#define SEQ_START_TOKEN ((void *)1)
3074
3075static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3076{
3077 struct bonding *bond = seq->private;
3078 loff_t off = 0;
3079 struct slave *slave;
3080 int i;
3081
3082 /* make sure the bond won't be taken away */
3083 read_lock(&dev_base_lock);
6603a6f2 3084 read_lock(&bond->lock);
1da177e4
LT		 3085
3086 if (*pos == 0) {
3087 return SEQ_START_TOKEN;
3088 }
3089
3090 bond_for_each_slave(bond, slave, i) {
3091 if (++off == *pos) {
3092 return slave;
3093 }
3094 }
3095
3096 return NULL;
3097}
3098
3099static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3100{
3101 struct bonding *bond = seq->private;
3102 struct slave *slave = v;
3103
3104 ++*pos;
3105 if (v == SEQ_START_TOKEN) {
3106 return bond->first_slave;
3107 }
3108
3109 slave = slave->next;
3110
3111 return (slave == bond->first_slave) ? NULL : slave;
3112}
3113
3114static void bond_info_seq_stop(struct seq_file *seq, void *v)
3115{
3116 struct bonding *bond = seq->private;
3117
6603a6f2 3118 read_unlock(&bond->lock);
1da177e4
LT		 3119 read_unlock(&dev_base_lock);
3120}
3121
3122static void bond_info_show_master(struct seq_file *seq)
3123{
3124 struct bonding *bond = seq->private;
3125 struct slave *curr;
4756b02f
MW		 3126 int i;
3127 u32 target;
1da177e4
LT		 3128
3129 read_lock(&bond->curr_slave_lock);
3130 curr = bond->curr_active_slave;
3131 read_unlock(&bond->curr_slave_lock);
3132
dd957c57 3133 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3134 bond_mode_name(bond->params.mode));
3135
dd957c57
JV		 3136 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3137 bond->params.fail_over_mac)
3138 seq_printf(seq, " (fail_over_mac)");
3139
3140 seq_printf(seq, "\n");
3141
c61b75ad
MW		 3142 if (bond->params.mode == BOND_MODE_XOR ||
3143 bond->params.mode == BOND_MODE_8023AD) {
3144 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3145 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3146 bond->params.xmit_policy);
3147 }
3148
1da177e4
LT		 3149 if (USES_PRIMARY(bond->params.mode)) {
3150 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3151 (bond->primary_slave) ?
3152 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3153
3154 seq_printf(seq, "Currently Active Slave: %s\n",
3155 (curr) ? curr->dev->name : "None");
3156 }
3157
ff59c456
JV		 3158 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3159 "up" : "down");
1da177e4
LT		 3160 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3161 seq_printf(seq, "Up Delay (ms): %d\n",
3162 bond->params.updelay * bond->params.miimon);
3163 seq_printf(seq, "Down Delay (ms): %d\n",
3164 bond->params.downdelay * bond->params.miimon);
3165
4756b02f
MW		 3166
3167 /* ARP information */
3168 if(bond->params.arp_interval > 0) {
3169 int printed=0;
3170 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3171 bond->params.arp_interval);
3172
3173 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3174
3175 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3176 if (!bond->params.arp_targets[i])
3177 continue;
3178 if (printed)
3179 seq_printf(seq, ",");
3180 target = ntohl(bond->params.arp_targets[i]);
3181 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3182 printed = 1;
3183 }
3184 seq_printf(seq, "\n");
3185 }
3186
1da177e4
LT		 3187 if (bond->params.mode == BOND_MODE_8023AD) {
3188 struct ad_info ad_info;
0795af57 3189 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3190
3191 seq_puts(seq, "\n802.3ad info\n");
3192 seq_printf(seq, "LACP rate: %s\n",
3193 (bond->params.lacp_fast) ? "fast" : "slow");
3194
3195 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3196 seq_printf(seq, "bond %s has no active aggregator\n",
3197 bond->dev->name);
3198 } else {
3199 seq_printf(seq, "Active Aggregator Info:\n");
3200
3201 seq_printf(seq, "\tAggregator ID: %d\n",
3202 ad_info.aggregator_id);
3203 seq_printf(seq, "\tNumber of ports: %d\n",
3204 ad_info.ports);
3205 seq_printf(seq, "\tActor Key: %d\n",
3206 ad_info.actor_key);
3207 seq_printf(seq, "\tPartner Key: %d\n",
3208 ad_info.partner_key);
0795af57
JP		 3209 seq_printf(seq, "\tPartner Mac Address: %s\n",
3210 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3211 }
3212 }
3213}
3214
3215static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3216{
3217 struct bonding *bond = seq->private;
0795af57 3218 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3219
3220 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3221 seq_printf(seq, "MII Status: %s\n",
3222 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3223 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3224 slave->link_failure_count);
3225
217df670 3226 seq_printf(seq,
0795af57
JP		 3227 "Permanent HW addr: %s\n",
3228 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3229
3230 if (bond->params.mode == BOND_MODE_8023AD) {
3231 const struct aggregator *agg
3232 = SLAVE_AD_INFO(slave).port.aggregator;
3233
3234 if (agg) {
3235 seq_printf(seq, "Aggregator ID: %d\n",
3236 agg->aggregator_identifier);
3237 } else {
3238 seq_puts(seq, "Aggregator ID: N/A\n");
3239 }
3240 }
3241}
3242
3243static int bond_info_seq_show(struct seq_file *seq, void *v)
3244{
3245 if (v == SEQ_START_TOKEN) {
3246 seq_printf(seq, "%s\n", version);
3247 bond_info_show_master(seq);
3248 } else {
3249 bond_info_show_slave(seq, v);
3250 }
3251
3252 return 0;
3253}
3254
3255static struct seq_operations bond_info_seq_ops = {
3256 .start = bond_info_seq_start,
3257 .next = bond_info_seq_next,
3258 .stop = bond_info_seq_stop,
3259 .show = bond_info_seq_show,
3260};
3261
3262static int bond_info_open(struct inode *inode, struct file *file)
3263{
3264 struct seq_file *seq;
3265 struct proc_dir_entry *proc;
3266 int res;
3267
3268 res = seq_open(file, &bond_info_seq_ops);
3269 if (!res) {
3270 /* recover the pointer buried in proc_dir_entry data */
3271 seq = file->private_data;
3272 proc = PDE(inode);
3273 seq->private = proc->data;
3274 }
3275
3276 return res;
3277}
3278
d54b1fdb 3279static const struct file_operations bond_info_fops = {
1da177e4
LT		 3280 .owner = THIS_MODULE,
3281 .open = bond_info_open,
3282 .read = seq_read,
3283 .llseek = seq_lseek,
3284 .release = seq_release,
3285};
3286
3287static int bond_create_proc_entry(struct bonding *bond)
3288{
3289 struct net_device *bond_dev = bond->dev;
3290
3291 if (bond_proc_dir) {
3292 bond->proc_entry = create_proc_entry(bond_dev->name,
3293 S_IRUGO,
3294 bond_proc_dir);
3295 if (bond->proc_entry == NULL) {
3296 printk(KERN_WARNING DRV_NAME
3297 ": Warning: Cannot create /proc/net/%s/%s\n",
3298 DRV_NAME, bond_dev->name);
3299 } else {
3300 bond->proc_entry->data = bond;
3301 bond->proc_entry->proc_fops = &bond_info_fops;
3302 bond->proc_entry->owner = THIS_MODULE;
3303 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3304 }
3305 }
3306
3307 return 0;
3308}
3309
3310static void bond_remove_proc_entry(struct bonding *bond)
3311{
3312 if (bond_proc_dir && bond->proc_entry) {
3313 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3314 memset(bond->proc_file_name, 0, IFNAMSIZ);
3315 bond->proc_entry = NULL;
3316 }
3317}
3318
3319/* Create the bonding directory under /proc/net, if doesn't exist yet.
3320 * Caller must hold rtnl_lock.
3321 */
3322static void bond_create_proc_dir(void)
3323{
3324 int len = strlen(DRV_NAME);
3325
457c4cbc 3326 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3327 bond_proc_dir = bond_proc_dir->next) {
3328 if ((bond_proc_dir->namelen == len) &&
3329 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3330 break;
3331 }
3332 }
3333
3334 if (!bond_proc_dir) {
457c4cbc 3335 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3336 if (bond_proc_dir) {
3337 bond_proc_dir->owner = THIS_MODULE;
3338 } else {
3339 printk(KERN_WARNING DRV_NAME
3340 ": Warning: cannot create /proc/net/%s\n",
3341 DRV_NAME);
3342 }
3343 }
3344}
3345
3346/* Destroy the bonding directory under /proc/net, if empty.
3347 * Caller must hold rtnl_lock.
3348 */
3349static void bond_destroy_proc_dir(void)
3350{
3351 struct proc_dir_entry *de;
3352
3353 if (!bond_proc_dir) {
3354 return;
3355 }
3356
3357 /* verify that the /proc dir is empty */
3358 for (de = bond_proc_dir->subdir; de; de = de->next) {
3359 /* ignore . and .. */
3360 if (*(de->name) != '.') {
3361 break;
3362 }
3363 }
3364
3365 if (de) {
3366 if (bond_proc_dir->owner == THIS_MODULE) {
3367 bond_proc_dir->owner = NULL;
3368 }
3369 } else {
457c4cbc 3370 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3371 bond_proc_dir = NULL;
3372 }
3373}
3374#endif /* CONFIG_PROC_FS */
3375
3376/*-------------------------- netdev event handling --------------------------*/
3377
3378/*
3379 * Change device name
3380 */
3381static int bond_event_changename(struct bonding *bond)
3382{
3383#ifdef CONFIG_PROC_FS
3384 bond_remove_proc_entry(bond);
3385 bond_create_proc_entry(bond);
3386#endif
b76cdba9
MW		 3387 down_write(&(bonding_rwsem));
3388 bond_destroy_sysfs_entry(bond);
3389 bond_create_sysfs_entry(bond);
3390 up_write(&(bonding_rwsem));
1da177e4
LT		 3391 return NOTIFY_DONE;
3392}
3393
3394static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3395{
3396 struct bonding *event_bond = bond_dev->priv;
3397
3398 switch (event) {
3399 case NETDEV_CHANGENAME:
3400 return bond_event_changename(event_bond);
3401 case NETDEV_UNREGISTER:
3402 /*
3403 * TODO: remove a bond from the list?
3404 */
3405 break;
3406 default:
3407 break;
3408 }
3409
3410 return NOTIFY_DONE;
3411}
3412
3413static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3414{
3415 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3416 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3417
3418 switch (event) {
3419 case NETDEV_UNREGISTER:
3420 if (bond_dev) {
1284cd3a
JV		 3421 if (bond->setup_by_slave)
3422 bond_release_and_destroy(bond_dev, slave_dev);
3423 else
3424 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3425 }
3426 break;
3427 case NETDEV_CHANGE:
3428 /*
3429 * TODO: is this what we get if somebody
3430 * sets up a hierarchical bond, then rmmod's
3431 * one of the slave bonding devices?
3432 */
3433 break;
3434 case NETDEV_DOWN:
3435 /*
3436 * ... Or is it this?
3437 */
3438 break;
3439 case NETDEV_CHANGEMTU:
3440 /*
3441 * TODO: Should slaves be allowed to
3442 * independently alter their MTU? For
3443 * an active-backup bond, slaves need
3444 * not be the same type of device, so
3445 * MTUs may vary. For other modes,
3446 * slaves arguably should have the
3447 * same MTUs. To do this, we'd need to
3448 * take over the slave's change_mtu
3449 * function for the duration of their
3450 * servitude.
3451 */
3452 break;
3453 case NETDEV_CHANGENAME:
3454 /*
3455 * TODO: handle changing the primary's name
3456 */
3457 break;
8531c5ff
AK		 3458 case NETDEV_FEAT_CHANGE:
3459 bond_compute_features(bond);
3460 break;
1da177e4
LT		 3461 default:
3462 break;
3463 }
3464
3465 return NOTIFY_DONE;
3466}
3467
3468/*
3469 * bond_netdev_event: handle netdev notifier chain events.
3470 *
3471 * This function receives events for the netdev chain. The caller (an
e041c683 3472 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3473 * locks for us to safely manipulate the slave devices (RTNL lock,
3474 * dev_probe_lock).
3475 */
3476static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3477{
3478 struct net_device *event_dev = (struct net_device *)ptr;
3479
e9dc8653
EB		 3480 if (event_dev->nd_net != &init_net)
3481 return NOTIFY_DONE;
3482
1da177e4
LT		 3483 dprintk("event_dev: %s, event: %lx\n",
3484 (event_dev ? event_dev->name : "None"),
3485 event);
3486
0b680e75
JV		 3487 if (!(event_dev->priv_flags & IFF_BONDING))
3488 return NOTIFY_DONE;
3489
1da177e4
LT		 3490 if (event_dev->flags & IFF_MASTER) {
3491 dprintk("IFF_MASTER\n");
3492 return bond_master_netdev_event(event, event_dev);
3493 }
3494
3495 if (event_dev->flags & IFF_SLAVE) {
3496 dprintk("IFF_SLAVE\n");
3497 return bond_slave_netdev_event(event, event_dev);
3498 }
3499
3500 return NOTIFY_DONE;
3501}
3502
c3ade5ca
JV		 3503/*
3504 * bond_inetaddr_event: handle inetaddr notifier chain events.
3505 *
3506 * We keep track of device IPs primarily to use as source addresses in
3507 * ARP monitor probes (rather than spewing out broadcasts all the time).
3508 *
3509 * We track one IP for the main device (if it has one), plus one per VLAN.
3510 */
3511static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3512{
3513 struct in_ifaddr *ifa = ptr;
3514 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3515 struct bonding *bond, *bond_next;
3516 struct vlan_entry *vlan, *vlan_next;
3517
3518 list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
3519 if (bond->dev == event_dev) {
3520 switch (event) {
3521 case NETDEV_UP:
3522 bond->master_ip = ifa->ifa_local;
3523 return NOTIFY_OK;
3524 case NETDEV_DOWN:
3525 bond->master_ip = bond_glean_dev_ip(bond->dev);
3526 return NOTIFY_OK;
3527 default:
3528 return NOTIFY_DONE;
3529 }
3530 }
3531
3532 if (list_empty(&bond->vlan_list))
3533 continue;
3534
3535 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
3536 vlan_list) {
5c15bdec 3537 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3538 if (vlan_dev == event_dev) {
3539 switch (event) {
3540 case NETDEV_UP:
3541 vlan->vlan_ip = ifa->ifa_local;
3542 return NOTIFY_OK;
3543 case NETDEV_DOWN:
3544 vlan->vlan_ip =
3545 bond_glean_dev_ip(vlan_dev);
3546 return NOTIFY_OK;
3547 default:
3548 return NOTIFY_DONE;
3549 }
3550 }
3551 }
3552 }
3553 return NOTIFY_DONE;
3554}
3555
1da177e4
LT		 3556static struct notifier_block bond_netdev_notifier = {
3557 .notifier_call = bond_netdev_event,
3558};
3559
c3ade5ca
JV		 3560static struct notifier_block bond_inetaddr_notifier = {
3561 .notifier_call = bond_inetaddr_event,
3562};
3563
1da177e4
LT		 3564/*-------------------------- Packet type handling ---------------------------*/
3565
3566/* register to receive lacpdus on a bond */
3567static void bond_register_lacpdu(struct bonding *bond)
3568{
3569 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3570
3571 /* initialize packet type */
3572 pk_type->type = PKT_TYPE_LACPDU;
3573 pk_type->dev = bond->dev;
3574 pk_type->func = bond_3ad_lacpdu_recv;
3575
3576 dev_add_pack(pk_type);
3577}
3578
3579/* unregister to receive lacpdus on a bond */
3580static void bond_unregister_lacpdu(struct bonding *bond)
3581{
3582 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3583}
3584
f5b2b966
JV		 3585void bond_register_arp(struct bonding *bond)
3586{
3587 struct packet_type *pt = &bond->arp_mon_pt;
3588
c4f283b1
JV		 3589 if (pt->type)
3590 return;
3591
f5b2b966 3592 pt->type = htons(ETH_P_ARP);
e245cb71 3593 pt->dev = bond->dev;
f5b2b966
JV		 3594 pt->func = bond_arp_rcv;
3595 dev_add_pack(pt);
3596}
3597
3598void bond_unregister_arp(struct bonding *bond)
3599{
c4f283b1
JV		 3600 struct packet_type *pt = &bond->arp_mon_pt;
3601
3602 dev_remove_pack(pt);
3603 pt->type = 0;
f5b2b966
JV		 3604}
3605
169a3e66
JV		 3606/*---------------------------- Hashing Policies -----------------------------*/
3607
6f6652be
JV		 3608/*
3609 * Hash for the output device based upon layer 2 and layer 3 data. If
3610 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3611 */
3612static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3613 struct net_device *bond_dev, int count)
3614{
3615 struct ethhdr *data = (struct ethhdr *)skb->data;
3616 struct iphdr *iph = ip_hdr(skb);
3617
3618 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3619 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3620 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3621 }
3622
3623 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3624}
3625
169a3e66 3626/*
59c51591 3627 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3628 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3629 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3630 */
3631static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3632 struct net_device *bond_dev, int count)
3633{
3634 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3635 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3636 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3637 int layer4_xor = 0;
3638
3639 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3640 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3641 (iph->protocol == IPPROTO_TCP ||
3642 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3643 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3644 }
3645 return (layer4_xor ^
3646 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3647
3648 }
3649
3650 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3651}
3652
3653/*
3654 * Hash for the output device based upon layer 2 data
3655 */
3656static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3657 struct net_device *bond_dev, int count)
3658{
3659 struct ethhdr *data = (struct ethhdr *)skb->data;
3660
3661 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3662}
3663
1da177e4
LT		 3664/*-------------------------- Device entry points ----------------------------*/
3665
3666static int bond_open(struct net_device *bond_dev)
3667{
3668 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3669
3670 bond->kill_timers = 0;
3671
3672 if ((bond->params.mode == BOND_MODE_TLB) ||
3673 (bond->params.mode == BOND_MODE_ALB)) {
1da177e4
LT		 3674 /* bond_alb_initialize must be called before the timer
3675 * is started.
3676 */
3677 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3678 /* something went wrong - fail the open operation */
3679 return -1;
3680 }
3681
1b76b316
JV		 3682 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3683 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3684 }
3685
3686 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3687 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3688 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3689 }
3690
3691 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3692 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3693 INIT_DELAYED_WORK(&bond->arp_work,
3694 bond_activebackup_arp_mon);
3695 else
3696 INIT_DELAYED_WORK(&bond->arp_work,
3697 bond_loadbalance_arp_mon);
3698
3699 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3700 if (bond->params.arp_validate)
3701 bond_register_arp(bond);
1da177e4
LT		 3702 }
3703
3704 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3705 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3706 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3707 /* register to receive LACPDUs */
3708 bond_register_lacpdu(bond);
3709 }
3710
3711 return 0;
3712}
3713
3714static int bond_close(struct net_device *bond_dev)
3715{
3716 struct bonding *bond = bond_dev->priv;
3717
3718 if (bond->params.mode == BOND_MODE_8023AD) {
3719 /* Unregister the receive of LACPDUs */
3720 bond_unregister_lacpdu(bond);
3721 }
3722
f5b2b966
JV		 3723 if (bond->params.arp_validate)
3724 bond_unregister_arp(bond);
3725
1da177e4
LT		 3726 write_lock_bh(&bond->lock);
3727
1da177e4
LT		 3728
3729 /* signal timers not to re-arm */
3730 bond->kill_timers = 1;
3731
3732 write_unlock_bh(&bond->lock);
3733
1da177e4 3734 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3735 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3736 }
3737
3738 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3739 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3740 }
3741
3742 switch (bond->params.mode) {
3743 case BOND_MODE_8023AD:
1b76b316 3744 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3745 break;
3746 case BOND_MODE_TLB:
3747 case BOND_MODE_ALB:
1b76b316 3748 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3749 break;
3750 default:
3751 break;
3752 }
3753
1da177e4
LT		 3754
3755 if ((bond->params.mode == BOND_MODE_TLB) ||
3756 (bond->params.mode == BOND_MODE_ALB)) {
3757 /* Must be called only after all
3758 * slaves have been released
3759 */
3760 bond_alb_deinitialize(bond);
3761 }
3762
3763 return 0;
3764}
3765
3766static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3767{
3768 struct bonding *bond = bond_dev->priv;
3769 struct net_device_stats *stats = &(bond->stats), *sstats;
3770 struct slave *slave;
3771 int i;
3772
3773 memset(stats, 0, sizeof(struct net_device_stats));
3774
3775 read_lock_bh(&bond->lock);
3776
3777 bond_for_each_slave(bond, slave, i) {
c45d286e 3778 sstats = slave->dev->get_stats(slave->dev);
5a1b5898
RR		 3779 stats->rx_packets += sstats->rx_packets;
3780 stats->rx_bytes += sstats->rx_bytes;
3781 stats->rx_errors += sstats->rx_errors;
3782 stats->rx_dropped += sstats->rx_dropped;
3783
3784 stats->tx_packets += sstats->tx_packets;
3785 stats->tx_bytes += sstats->tx_bytes;
3786 stats->tx_errors += sstats->tx_errors;
3787 stats->tx_dropped += sstats->tx_dropped;
3788
3789 stats->multicast += sstats->multicast;
3790 stats->collisions += sstats->collisions;
3791
3792 stats->rx_length_errors += sstats->rx_length_errors;
3793 stats->rx_over_errors += sstats->rx_over_errors;
3794 stats->rx_crc_errors += sstats->rx_crc_errors;
3795 stats->rx_frame_errors += sstats->rx_frame_errors;
3796 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3797 stats->rx_missed_errors += sstats->rx_missed_errors;
3798
3799 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3800 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3801 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3802 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3803 stats->tx_window_errors += sstats->tx_window_errors;
1da177e4
LT		 3804 }
3805
3806 read_unlock_bh(&bond->lock);
3807
3808 return stats;
3809}
3810
3811static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3812{
3813 struct net_device *slave_dev = NULL;
3814 struct ifbond k_binfo;
3815 struct ifbond __user *u_binfo = NULL;
3816 struct ifslave k_sinfo;
3817 struct ifslave __user *u_sinfo = NULL;
3818 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3819 int res = 0;
3820
3821 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3822 bond_dev->name, cmd);
3823
3824 switch (cmd) {
1da177e4
LT		 3825 case SIOCGMIIPHY:
3826 mii = if_mii(ifr);
3827 if (!mii) {
3828 return -EINVAL;
3829 }
3830 mii->phy_id = 0;
3831 /* Fall Through */
3832 case SIOCGMIIREG:
3833 /*
3834 * We do this again just in case we were called by SIOCGMIIREG
3835 * instead of SIOCGMIIPHY.
3836 */
3837 mii = if_mii(ifr);
3838 if (!mii) {
3839 return -EINVAL;
3840 }
3841
3842 if (mii->reg_num == 1) {
3843 struct bonding *bond = bond_dev->priv;
3844 mii->val_out = 0;
6603a6f2 3845 read_lock(&bond->lock);
1da177e4 3846 read_lock(&bond->curr_slave_lock);
4e140079 3847 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3848 mii->val_out = BMSR_LSTATUS;
3849 }
3850 read_unlock(&bond->curr_slave_lock);
6603a6f2 3851 read_unlock(&bond->lock);
1da177e4
LT		 3852 }
3853
3854 return 0;
3855 case BOND_INFO_QUERY_OLD:
3856 case SIOCBONDINFOQUERY:
3857 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3858
3859 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3860 return -EFAULT;
3861 }
3862
3863 res = bond_info_query(bond_dev, &k_binfo);
3864 if (res == 0) {
3865 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3866 return -EFAULT;
3867 }
3868 }
3869
3870 return res;
3871 case BOND_SLAVE_INFO_QUERY_OLD:
3872 case SIOCBONDSLAVEINFOQUERY:
3873 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3874
3875 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3876 return -EFAULT;
3877 }
3878
3879 res = bond_slave_info_query(bond_dev, &k_sinfo);
3880 if (res == 0) {
3881 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3882 return -EFAULT;
3883 }
3884 }
3885
3886 return res;
3887 default:
3888 /* Go on */
3889 break;
3890 }
3891
3892 if (!capable(CAP_NET_ADMIN)) {
3893 return -EPERM;
3894 }
3895
b76cdba9 3896 down_write(&(bonding_rwsem));
881d966b 3897 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3898
3899 dprintk("slave_dev=%p: \n", slave_dev);
3900
3901 if (!slave_dev) {
3902 res = -ENODEV;
3903 } else {
3904 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3905 switch (cmd) {
3906 case BOND_ENSLAVE_OLD:
3907 case SIOCBONDENSLAVE:
3908 res = bond_enslave(bond_dev, slave_dev);
3909 break;
3910 case BOND_RELEASE_OLD:
3911 case SIOCBONDRELEASE:
3912 res = bond_release(bond_dev, slave_dev);
3913 break;
3914 case BOND_SETHWADDR_OLD:
3915 case SIOCBONDSETHWADDR:
3916 res = bond_sethwaddr(bond_dev, slave_dev);
3917 break;
3918 case BOND_CHANGE_ACTIVE_OLD:
3919 case SIOCBONDCHANGEACTIVE:
3920 res = bond_ioctl_change_active(bond_dev, slave_dev);
3921 break;
3922 default:
3923 res = -EOPNOTSUPP;
3924 }
3925
3926 dev_put(slave_dev);
3927 }
3928
b76cdba9 3929 up_write(&(bonding_rwsem));
1da177e4
LT		 3930 return res;
3931}
3932
3933static void bond_set_multicast_list(struct net_device *bond_dev)
3934{
3935 struct bonding *bond = bond_dev->priv;
3936 struct dev_mc_list *dmi;
3937
3938 write_lock_bh(&bond->lock);
3939
3940 /*
3941 * Do promisc before checking multicast_mode
3942 */
3943 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
3944 bond_set_promiscuity(bond, 1);
3945 }
3946
3947 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
3948 bond_set_promiscuity(bond, -1);
3949 }
3950
3951 /* set allmulti flag to slaves */
3952 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
3953 bond_set_allmulti(bond, 1);
3954 }
3955
3956 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
3957 bond_set_allmulti(bond, -1);
3958 }
3959
3960 bond->flags = bond_dev->flags;
3961
3962 /* looking for addresses to add to slaves' mc list */
3963 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3964 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
3965 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3966 }
3967 }
3968
3969 /* looking for addresses to delete from slaves' list */
3970 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3971 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
3972 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3973 }
3974 }
3975
3976 /* save master's multicast list */
3977 bond_mc_list_destroy(bond);
3978 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
3979
3980 write_unlock_bh(&bond->lock);
3981}
3982
3983/*
3984 * Change the MTU of all of a master's slaves to match the master
3985 */
3986static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3987{
3988 struct bonding *bond = bond_dev->priv;
3989 struct slave *slave, *stop_at;
3990 int res = 0;
3991 int i;
3992
3993 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
3994 (bond_dev ? bond_dev->name : "None"), new_mtu);
3995
3996 /* Can't hold bond->lock with bh disabled here since
3997 * some base drivers panic. On the other hand we can't
3998 * hold bond->lock without bh disabled because we'll
3999 * deadlock. The only solution is to rely on the fact
4000 * that we're under rtnl_lock here, and the slaves
4001 * list won't change. This doesn't solve the problem
4002 * of setting the slave's MTU while it is
4003 * transmitting, but the assumption is that the base
4004 * driver can handle that.
4005 *
4006 * TODO: figure out a way to safely iterate the slaves
4007 * list, but without holding a lock around the actual
4008 * call to the base driver.
4009 */
4010
4011 bond_for_each_slave(bond, slave, i) {
4012 dprintk("s %p s->p %p c_m %p\n", slave,
4013 slave->prev, slave->dev->change_mtu);
e944ef79 4014
1da177e4
LT		 4015 res = dev_set_mtu(slave->dev, new_mtu);
4016
4017 if (res) {
4018 /* If we failed to set the slave's mtu to the new value
4019 * we must abort the operation even in ACTIVE_BACKUP
4020 * mode, because if we allow the backup slaves to have
4021 * different mtu values than the active slave we'll
4022 * need to change their mtu when doing a failover. That
4023 * means changing their mtu from timer context, which
4024 * is probably not a good idea.
4025 */
4026 dprintk("err %d %s\n", res, slave->dev->name);
4027 goto unwind;
4028 }
4029 }
4030
4031 bond_dev->mtu = new_mtu;
4032
4033 return 0;
4034
4035unwind:
4036 /* unwind from head to the slave that failed */
4037 stop_at = slave;
4038 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4039 int tmp_res;
4040
4041 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4042 if (tmp_res) {
4043 dprintk("unwind err %d dev %s\n", tmp_res,
4044 slave->dev->name);
4045 }
4046 }
4047
4048 return res;
4049}
4050
4051/*
4052 * Change HW address
4053 *
4054 * Note that many devices must be down to change the HW address, and
4055 * downing the master releases all slaves. We can make bonds full of
4056 * bonding devices to test this, however.
4057 */
4058static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4059{
4060 struct bonding *bond = bond_dev->priv;
4061 struct sockaddr *sa = addr, tmp_sa;
4062 struct slave *slave, *stop_at;
4063 int res = 0;
4064 int i;
4065
4066 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4067
dd957c57
JV		 4068 /*
4069 * If fail_over_mac is enabled, do nothing and return success.
4070 * Returning an error causes ifenslave to fail.
4071 */
4072 if (bond->params.fail_over_mac)
4073 return 0;
2ab82852 4074
1da177e4
LT		 4075 if (!is_valid_ether_addr(sa->sa_data)) {
4076 return -EADDRNOTAVAIL;
4077 }
4078
4079 /* Can't hold bond->lock with bh disabled here since
4080 * some base drivers panic. On the other hand we can't
4081 * hold bond->lock without bh disabled because we'll
4082 * deadlock. The only solution is to rely on the fact
4083 * that we're under rtnl_lock here, and the slaves
4084 * list won't change. This doesn't solve the problem
4085 * of setting the slave's hw address while it is
4086 * transmitting, but the assumption is that the base
4087 * driver can handle that.
4088 *
4089 * TODO: figure out a way to safely iterate the slaves
4090 * list, but without holding a lock around the actual
4091 * call to the base driver.
4092 */
4093
4094 bond_for_each_slave(bond, slave, i) {
4095 dprintk("slave %p %s\n", slave, slave->dev->name);
4096
4097 if (slave->dev->set_mac_address == NULL) {
4098 res = -EOPNOTSUPP;
4099 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4100 goto unwind;
4101 }
4102
4103 res = dev_set_mac_address(slave->dev, addr);
4104 if (res) {
4105 /* TODO: consider downing the slave
4106 * and retry ?
4107 * User should expect communications
4108 * breakage anyway until ARP finish
4109 * updating, so...
4110 */
4111 dprintk("err %d %s\n", res, slave->dev->name);
4112 goto unwind;
4113 }
4114 }
4115
4116 /* success */
4117 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4118 return 0;
4119
4120unwind:
4121 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4122 tmp_sa.sa_family = bond_dev->type;
4123
4124 /* unwind from head to the slave that failed */
4125 stop_at = slave;
4126 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4127 int tmp_res;
4128
4129 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4130 if (tmp_res) {
4131 dprintk("unwind err %d dev %s\n", tmp_res,
4132 slave->dev->name);
4133 }
4134 }
4135
4136 return res;
4137}
4138
4139static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4140{
4141 struct bonding *bond = bond_dev->priv;
4142 struct slave *slave, *start_at;
cf5f9044 4143 int i, slave_no, res = 1;
1da177e4
LT		 4144
4145 read_lock(&bond->lock);
4146
4147 if (!BOND_IS_OK(bond)) {
4148 goto out;
4149 }
4150
cf5f9044
JV		 4151 /*
4152 * Concurrent TX may collide on rr_tx_counter; we accept that
4153 * as being rare enough not to justify using an atomic op here
4154 */
4155 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4156
cf5f9044
JV		 4157 bond_for_each_slave(bond, slave, i) {
4158 slave_no--;
4159 if (slave_no < 0) {
4160 break;
4161 }
1da177e4
LT		 4162 }
4163
cf5f9044 4164 start_at = slave;
1da177e4
LT		 4165 bond_for_each_slave_from(bond, slave, i, start_at) {
4166 if (IS_UP(slave->dev) &&
4167 (slave->link == BOND_LINK_UP) &&
4168 (slave->state == BOND_STATE_ACTIVE)) {
4169 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4170 break;
4171 }
4172 }
4173
1da177e4
LT		 4174out:
4175 if (res) {
4176 /* no suitable interface, frame not sent */
4177 dev_kfree_skb(skb);
4178 }
4179 read_unlock(&bond->lock);
4180 return 0;
4181}
4182
075897ce 4183
1da177e4
LT		 4184/*
4185 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4186 * the bond has a usable interface.
4187 */
4188static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4189{
4190 struct bonding *bond = bond_dev->priv;
4191 int res = 1;
4192
1da177e4
LT		 4193 read_lock(&bond->lock);
4194 read_lock(&bond->curr_slave_lock);
4195
4196 if (!BOND_IS_OK(bond)) {
4197 goto out;
4198 }
4199
075897ce
JL		 4200 if (!bond->curr_active_slave)
4201 goto out;
4202
075897ce
JL		 4203 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4204
1da177e4
LT		 4205out:
4206 if (res) {
4207 /* no suitable interface, frame not sent */
4208 dev_kfree_skb(skb);
4209 }
4210 read_unlock(&bond->curr_slave_lock);
4211 read_unlock(&bond->lock);
4212 return 0;
4213}
4214
4215/*
169a3e66
JV		 4216 * In bond_xmit_xor() , we determine the output device by using a pre-
4217 * determined xmit_hash_policy(), If the selected device is not enabled,
4218 * find the next active slave.
1da177e4
LT		 4219 */
4220static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4221{
4222 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4223 struct slave *slave, *start_at;
4224 int slave_no;
4225 int i;
4226 int res = 1;
4227
4228 read_lock(&bond->lock);
4229
4230 if (!BOND_IS_OK(bond)) {
4231 goto out;
4232 }
4233
169a3e66 4234 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4235
4236 bond_for_each_slave(bond, slave, i) {
4237 slave_no--;
4238 if (slave_no < 0) {
4239 break;
4240 }
4241 }
4242
4243 start_at = slave;
4244
4245 bond_for_each_slave_from(bond, slave, i, start_at) {
4246 if (IS_UP(slave->dev) &&
4247 (slave->link == BOND_LINK_UP) &&
4248 (slave->state == BOND_STATE_ACTIVE)) {
4249 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4250 break;
4251 }
4252 }
4253
4254out:
4255 if (res) {
4256 /* no suitable interface, frame not sent */
4257 dev_kfree_skb(skb);
4258 }
4259 read_unlock(&bond->lock);
4260 return 0;
4261}
4262
4263/*
4264 * in broadcast mode, we send everything to all usable interfaces.
4265 */
4266static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4267{
4268 struct bonding *bond = bond_dev->priv;
4269 struct slave *slave, *start_at;
4270 struct net_device *tx_dev = NULL;
4271 int i;
4272 int res = 1;
4273
4274 read_lock(&bond->lock);
4275
4276 if (!BOND_IS_OK(bond)) {
4277 goto out;
4278 }
4279
4280 read_lock(&bond->curr_slave_lock);
4281 start_at = bond->curr_active_slave;
4282 read_unlock(&bond->curr_slave_lock);
4283
4284 if (!start_at) {
4285 goto out;
4286 }
4287
4288 bond_for_each_slave_from(bond, slave, i, start_at) {
4289 if (IS_UP(slave->dev) &&
4290 (slave->link == BOND_LINK_UP) &&
4291 (slave->state == BOND_STATE_ACTIVE)) {
4292 if (tx_dev) {
4293 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4294 if (!skb2) {
4295 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4296 ": %s: Error: bond_xmit_broadcast(): "
4297 "skb_clone() failed\n",
4298 bond_dev->name);
1da177e4
LT		 4299 continue;
4300 }
4301
4302 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4303 if (res) {
4304 dev_kfree_skb(skb2);
4305 continue;
4306 }
4307 }
4308 tx_dev = slave->dev;
4309 }
4310 }
4311
4312 if (tx_dev) {
4313 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4314 }
4315
4316out:
4317 if (res) {
4318 /* no suitable interface, frame not sent */
4319 dev_kfree_skb(skb);
4320 }
4321 /* frame sent to all suitable interfaces */
4322 read_unlock(&bond->lock);
4323 return 0;
4324}
4325
4326/*------------------------- Device initialization ---------------------------*/
4327
6f6652be
JV		 4328static void bond_set_xmit_hash_policy(struct bonding *bond)
4329{
4330 switch (bond->params.xmit_policy) {
4331 case BOND_XMIT_POLICY_LAYER23:
4332 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4333 break;
4334 case BOND_XMIT_POLICY_LAYER34:
4335 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4336 break;
4337 case BOND_XMIT_POLICY_LAYER2:
4338 default:
4339 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4340 break;
4341 }
4342}
4343
1da177e4
LT		 4344/*
4345 * set bond mode specific net device operations
4346 */
a77b5325 4347void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4348{
169a3e66
JV		 4349 struct net_device *bond_dev = bond->dev;
4350
1da177e4
LT		 4351 switch (mode) {
4352 case BOND_MODE_ROUNDROBIN:
4353 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4354 break;
4355 case BOND_MODE_ACTIVEBACKUP:
4356 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4357 break;
4358 case BOND_MODE_XOR:
4359 bond_dev->hard_start_xmit = bond_xmit_xor;
6f6652be 4360 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4361 break;
4362 case BOND_MODE_BROADCAST:
4363 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4364 break;
4365 case BOND_MODE_8023AD:
8f903c70 4366 bond_set_master_3ad_flags(bond);
1da177e4 4367 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
6f6652be 4368 bond_set_xmit_hash_policy(bond);
1da177e4 4369 break;
1da177e4 4370 case BOND_MODE_ALB:
8f903c70
JV		 4371 bond_set_master_alb_flags(bond);
4372 /* FALLTHRU */
4373 case BOND_MODE_TLB:
1da177e4
LT		 4374 bond_dev->hard_start_xmit = bond_alb_xmit;
4375 bond_dev->set_mac_address = bond_alb_set_mac_address;
4376 break;
4377 default:
4378 /* Should never happen, mode already checked */
4379 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4380 ": %s: Error: Unknown bonding mode %d\n",
4381 bond_dev->name,
1da177e4
LT		 4382 mode);
4383 break;
4384 }
4385}
4386
217df670
JV		 4387static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4388 struct ethtool_drvinfo *drvinfo)
4389{
4390 strncpy(drvinfo->driver, DRV_NAME, 32);
4391 strncpy(drvinfo->version, DRV_VERSION, 32);
4392 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4393}
4394
7282d491 4395static const struct ethtool_ops bond_ethtool_ops = {
217df670 4396 .get_drvinfo = bond_ethtool_get_drvinfo,
8531c5ff
AK		 4397};
4398
1da177e4
LT		 4399/*
4400 * Does not allocate but creates a /proc entry.
4401 * Allowed to fail.
4402 */
3c535952 4403static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4404{
4405 struct bonding *bond = bond_dev->priv;
4406
4407 dprintk("Begin bond_init for %s\n", bond_dev->name);
4408
4409 /* initialize rwlocks */
4410 rwlock_init(&bond->lock);
4411 rwlock_init(&bond->curr_slave_lock);
4412
4413 bond->params = *params; /* copy params struct */
4414
1b76b316
JV		 4415 bond->wq = create_singlethread_workqueue(bond_dev->name);
4416 if (!bond->wq)
4417 return -ENOMEM;
4418
1da177e4
LT		 4419 /* Initialize pointers */
4420 bond->first_slave = NULL;
4421 bond->curr_active_slave = NULL;
4422 bond->current_arp_slave = NULL;
4423 bond->primary_slave = NULL;
4424 bond->dev = bond_dev;
1053f62c 4425 bond->send_grat_arp = 0;
d90a162a 4426 bond->setup_by_slave = 0;
1da177e4
LT		 4427 INIT_LIST_HEAD(&bond->vlan_list);
4428
4429 /* Initialize the device entry points */
4430 bond_dev->open = bond_open;
4431 bond_dev->stop = bond_close;
4432 bond_dev->get_stats = bond_get_stats;
4433 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4434 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4435 bond_dev->set_multicast_list = bond_set_multicast_list;
4436 bond_dev->change_mtu = bond_change_mtu;
4437 bond_dev->set_mac_address = bond_set_mac_address;
3a1521b7 4438 bond_dev->validate_addr = NULL;
1da177e4 4439
169a3e66 4440 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4441
4442 bond_dev->destructor = free_netdev;
4443
4444 /* Initialize the device options */
4445 bond_dev->tx_queue_len = 0;
4446 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4447 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4448
4449 /* At first, we block adding VLANs. That's the only way to
4450 * prevent problems that occur when adding VLANs over an
4451 * empty bond. The block will be removed once non-challenged
4452 * slaves are enslaved.
4453 */
4454 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4455
932ff279 4456 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4457 * transmitting */
4458 bond_dev->features |= NETIF_F_LLTX;
4459
4460 /* By default, we declare the bond to be fully
4461 * VLAN hardware accelerated capable. Special
4462 * care is taken in the various xmit functions
4463 * when there are slaves that are not hw accel
4464 * capable
4465 */
4466 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4467 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4468 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4469 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4470 NETIF_F_HW_VLAN_RX |
4471 NETIF_F_HW_VLAN_FILTER);
4472
4473#ifdef CONFIG_PROC_FS
4474 bond_create_proc_entry(bond);
4475#endif
1da177e4
LT		 4476 list_add_tail(&bond->bond_list, &bond_dev_list);
4477
4478 return 0;
4479}
4480
4481/* De-initialize device specific data.
4482 * Caller must hold rtnl_lock.
4483 */
c50b85d0 4484static void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4485{
4486 struct bonding *bond = bond_dev->priv;
4487
4488 list_del(&bond->bond_list);
4489
4490#ifdef CONFIG_PROC_FS
4491 bond_remove_proc_entry(bond);
4492#endif
4493}
4494
fdaea7a9
JV		 4495static void bond_work_cancel_all(struct bonding *bond)
4496{
4497 write_lock_bh(&bond->lock);
4498 bond->kill_timers = 1;
4499 write_unlock_bh(&bond->lock);
4500
4501 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4502 cancel_delayed_work(&bond->mii_work);
4503
4504 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4505 cancel_delayed_work(&bond->arp_work);
4506
4507 if (bond->params.mode == BOND_MODE_ALB &&
4508 delayed_work_pending(&bond->alb_work))
4509 cancel_delayed_work(&bond->alb_work);
4510
4511 if (bond->params.mode == BOND_MODE_8023AD &&
4512 delayed_work_pending(&bond->ad_work))
4513 cancel_delayed_work(&bond->ad_work);
4514}
4515
1da177e4
LT		 4516/* Unregister and free all bond devices.
4517 * Caller must hold rtnl_lock.
4518 */
4519static void bond_free_all(void)
4520{
4521 struct bonding *bond, *nxt;
4522
4523 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4524 struct net_device *bond_dev = bond->dev;
4525
fdaea7a9 4526 bond_work_cancel_all(bond);
70298705 4527 bond_mc_list_destroy(bond);
4528 /* Release the bonded slaves */
4529 bond_release_all(bond_dev);
6603a6f2 4530 bond_deinit(bond_dev);
8cbdeec6 4531 unregister_netdevice(bond_dev);
1da177e4
LT		 4532 }
4533
4534#ifdef CONFIG_PROC_FS
4535 bond_destroy_proc_dir();
4536#endif
4537}
4538
4539/*------------------------- Module initialization ---------------------------*/
4540
4541/*
4542 * Convert string input module parms. Accept either the
4543 * number of the mode or its string name.
4544 */
a77b5325 4545int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl)
1da177e4
LT		 4546{
4547 int i;
4548
4549 for (i = 0; tbl[i].modename; i++) {
4550 if ((isdigit(*mode_arg) &&
4551 tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) ||
6f6652be 4552 (strcmp(mode_arg, tbl[i].modename) == 0)) {
1da177e4
LT		 4553 return tbl[i].mode;
4554 }
4555 }
4556
4557 return -1;
4558}
4559
4560static int bond_check_params(struct bond_params *params)
4561{
f5b2b966
JV		 4562 int arp_validate_value;
4563
1da177e4
LT		 4564 /*
4565 * Convert string parameters.
4566 */
4567 if (mode) {
4568 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4569 if (bond_mode == -1) {
4570 printk(KERN_ERR DRV_NAME
4571 ": Error: Invalid bonding mode \"%s\"\n",
4572 mode == NULL ? "NULL" : mode);
4573 return -EINVAL;
4574 }
4575 }
4576
169a3e66
JV		 4577 if (xmit_hash_policy) {
4578 if ((bond_mode != BOND_MODE_XOR) &&
4579 (bond_mode != BOND_MODE_8023AD)) {
4580 printk(KERN_INFO DRV_NAME
4581 ": xor_mode param is irrelevant in mode %s\n",
4582 bond_mode_name(bond_mode));
4583 } else {
4584 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4585 xmit_hashtype_tbl);
4586 if (xmit_hashtype == -1) {
4587 printk(KERN_ERR DRV_NAME
4588 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4589 xmit_hash_policy == NULL ? "NULL" :
4590 xmit_hash_policy);
4591 return -EINVAL;
4592 }
4593 }
4594 }
4595
1da177e4
LT		 4596 if (lacp_rate) {
4597 if (bond_mode != BOND_MODE_8023AD) {
4598 printk(KERN_INFO DRV_NAME
4599 ": lacp_rate param is irrelevant in mode %s\n",
4600 bond_mode_name(bond_mode));
4601 } else {
4602 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4603 if (lacp_fast == -1) {
4604 printk(KERN_ERR DRV_NAME
4605 ": Error: Invalid lacp rate \"%s\"\n",
4606 lacp_rate == NULL ? "NULL" : lacp_rate);
4607 return -EINVAL;
4608 }
4609 }
4610 }
4611
4612 if (max_bonds < 1 || max_bonds > INT_MAX) {
4613 printk(KERN_WARNING DRV_NAME
4614 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4615 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
1da177e4
LT		 4616 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4617 max_bonds = BOND_DEFAULT_MAX_BONDS;
4618 }
4619
4620 if (miimon < 0) {
4621 printk(KERN_WARNING DRV_NAME
4622 ": Warning: miimon module parameter (%d), "
4623 "not in range 0-%d, so it was reset to %d\n",
4624 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4625 miimon = BOND_LINK_MON_INTERV;
4626 }
4627
4628 if (updelay < 0) {
4629 printk(KERN_WARNING DRV_NAME
4630 ": Warning: updelay module parameter (%d), "
4631 "not in range 0-%d, so it was reset to 0\n",
4632 updelay, INT_MAX);
4633 updelay = 0;
4634 }
4635
4636 if (downdelay < 0) {
4637 printk(KERN_WARNING DRV_NAME
4638 ": Warning: downdelay module parameter (%d), "
4639 "not in range 0-%d, so it was reset to 0\n",
4640 downdelay, INT_MAX);
4641 downdelay = 0;
4642 }
4643
4644 if ((use_carrier != 0) && (use_carrier != 1)) {
4645 printk(KERN_WARNING DRV_NAME
4646 ": Warning: use_carrier module parameter (%d), "
4647 "not of valid value (0/1), so it was set to 1\n",
4648 use_carrier);
4649 use_carrier = 1;
4650 }
4651
4652 /* reset values for 802.3ad */
4653 if (bond_mode == BOND_MODE_8023AD) {
4654 if (!miimon) {
4655 printk(KERN_WARNING DRV_NAME
4656 ": Warning: miimon must be specified, "
4657 "otherwise bonding will not detect link "
4658 "failure, speed and duplex which are "
4659 "essential for 802.3ad operation\n");
4660 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4661 miimon = 100;
4662 }
4663 }
4664
4665 /* reset values for TLB/ALB */
4666 if ((bond_mode == BOND_MODE_TLB) ||
4667 (bond_mode == BOND_MODE_ALB)) {
4668 if (!miimon) {
4669 printk(KERN_WARNING DRV_NAME
4670 ": Warning: miimon must be specified, "
4671 "otherwise bonding will not detect link "
4672 "failure and link speed which are essential "
4673 "for TLB/ALB load balancing\n");
4674 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4675 miimon = 100;
4676 }
4677 }
4678
4679 if (bond_mode == BOND_MODE_ALB) {
4680 printk(KERN_NOTICE DRV_NAME
4681 ": In ALB mode you might experience client "
4682 "disconnections upon reconnection of a link if the "
4683 "bonding module updelay parameter (%d msec) is "
4684 "incompatible with the forwarding delay time of the "
4685 "switch\n",
4686 updelay);
4687 }
4688
4689 if (!miimon) {
4690 if (updelay || downdelay) {
4691 /* just warn the user the up/down delay will have
4692 * no effect since miimon is zero...
4693 */
4694 printk(KERN_WARNING DRV_NAME
4695 ": Warning: miimon module parameter not set "
4696 "and updelay (%d) or downdelay (%d) module "
4697 "parameter is set; updelay and downdelay have "
4698 "no effect unless miimon is set\n",
4699 updelay, downdelay);
4700 }
4701 } else {
4702 /* don't allow arp monitoring */
4703 if (arp_interval) {
4704 printk(KERN_WARNING DRV_NAME
4705 ": Warning: miimon (%d) and arp_interval (%d) "
4706 "can't be used simultaneously, disabling ARP "
4707 "monitoring\n",
4708 miimon, arp_interval);
4709 arp_interval = 0;
4710 }
4711
4712 if ((updelay % miimon) != 0) {
4713 printk(KERN_WARNING DRV_NAME
4714 ": Warning: updelay (%d) is not a multiple "
4715 "of miimon (%d), updelay rounded to %d ms\n",
4716 updelay, miimon, (updelay / miimon) * miimon);
4717 }
4718
4719 updelay /= miimon;
4720
4721 if ((downdelay % miimon) != 0) {
4722 printk(KERN_WARNING DRV_NAME
4723 ": Warning: downdelay (%d) is not a multiple "
4724 "of miimon (%d), downdelay rounded to %d ms\n",
4725 downdelay, miimon,
4726 (downdelay / miimon) * miimon);
4727 }
4728
4729 downdelay /= miimon;
4730 }
4731
4732 if (arp_interval < 0) {
4733 printk(KERN_WARNING DRV_NAME
4734 ": Warning: arp_interval module parameter (%d) "
4735 ", not in range 0-%d, so it was reset to %d\n",
4736 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4737 arp_interval = BOND_LINK_ARP_INTERV;
4738 }
4739
4740 for (arp_ip_count = 0;
4741 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4742 arp_ip_count++) {
4743 /* not complete check, but should be good enough to
4744 catch mistakes */
4745 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4746 printk(KERN_WARNING DRV_NAME
4747 ": Warning: bad arp_ip_target module parameter "
4748 "(%s), ARP monitoring will not be performed\n",
4749 arp_ip_target[arp_ip_count]);
4750 arp_interval = 0;
4751 } else {
d3bb52b0 4752 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4753 arp_target[arp_ip_count] = ip;
4754 }
4755 }
4756
4757 if (arp_interval && !arp_ip_count) {
4758 /* don't allow arping if no arp_ip_target given... */
4759 printk(KERN_WARNING DRV_NAME
4760 ": Warning: arp_interval module parameter (%d) "
4761 "specified without providing an arp_ip_target "
4762 "parameter, arp_interval was reset to 0\n",
4763 arp_interval);
4764 arp_interval = 0;
4765 }
4766
f5b2b966
JV		 4767 if (arp_validate) {
4768 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4769 printk(KERN_ERR DRV_NAME
4770 ": arp_validate only supported in active-backup mode\n");
4771 return -EINVAL;
4772 }
4773 if (!arp_interval) {
4774 printk(KERN_ERR DRV_NAME
4775 ": arp_validate requires arp_interval\n");
4776 return -EINVAL;
4777 }
4778
4779 arp_validate_value = bond_parse_parm(arp_validate,
4780 arp_validate_tbl);
4781 if (arp_validate_value == -1) {
4782 printk(KERN_ERR DRV_NAME
4783 ": Error: invalid arp_validate \"%s\"\n",
4784 arp_validate == NULL ? "NULL" : arp_validate);
4785 return -EINVAL;
4786 }
4787 } else
4788 arp_validate_value = 0;
4789
1da177e4
LT		 4790 if (miimon) {
4791 printk(KERN_INFO DRV_NAME
4792 ": MII link monitoring set to %d ms\n",
4793 miimon);
4794 } else if (arp_interval) {
4795 int i;
4796
4797 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4798 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4799 arp_interval,
4800 arp_validate_tbl[arp_validate_value].modename,
4801 arp_ip_count);
1da177e4
LT		 4802
4803 for (i = 0; i < arp_ip_count; i++)
4804 printk (" %s", arp_ip_target[i]);
4805
4806 printk("\n");
4807
4808 } else {
4809 /* miimon and arp_interval not set, we need one so things
4810 * work as expected, see bonding.txt for details
4811 */
4812 printk(KERN_WARNING DRV_NAME
4813 ": Warning: either miimon or arp_interval and "
4814 "arp_ip_target module parameters must be specified, "
4815 "otherwise bonding will not detect link failures! see "
4816 "bonding.txt for details.\n");
4817 }
4818
4819 if (primary && !USES_PRIMARY(bond_mode)) {
4820 /* currently, using a primary only makes sense
4821 * in active backup, TLB or ALB modes
4822 */
4823 printk(KERN_WARNING DRV_NAME
4824 ": Warning: %s primary device specified but has no "
4825 "effect in %s mode\n",
4826 primary, bond_mode_name(bond_mode));
4827 primary = NULL;
4828 }
4829
dd957c57
JV		 4830 if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
4831 printk(KERN_WARNING DRV_NAME
4832 ": Warning: fail_over_mac only affects "
4833 "active-backup mode.\n");
4834
1da177e4
LT		 4835 /* fill params struct with the proper values */
4836 params->mode = bond_mode;
169a3e66 4837 params->xmit_policy = xmit_hashtype;
1da177e4
LT		 4838 params->miimon = miimon;
4839 params->arp_interval = arp_interval;
f5b2b966 4840 params->arp_validate = arp_validate_value;
1da177e4
LT		 4841 params->updelay = updelay;
4842 params->downdelay = downdelay;
4843 params->use_carrier = use_carrier;
4844 params->lacp_fast = lacp_fast;
4845 params->primary[0] = 0;
dd957c57 4846 params->fail_over_mac = fail_over_mac;
1da177e4
LT		 4847
4848 if (primary) {
4849 strncpy(params->primary, primary, IFNAMSIZ);
4850 params->primary[IFNAMSIZ - 1] = 0;
4851 }
4852
4853 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4854
4855 return 0;
4856}
4857
0daa2303
PZ		 4858static struct lock_class_key bonding_netdev_xmit_lock_key;
4859
dfe60397 4860/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 4861 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 4862 * Caller must NOT hold rtnl_lock; we need to release it here before we
4863 * set up our sysfs entries.
4864 */
4865int bond_create(char *name, struct bond_params *params, struct bonding **newbond)
4866{
4867 struct net_device *bond_dev;
4868 int res;
4869
4870 rtnl_lock();
e4b91c48
JV		 4871 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
4872 ether_setup);
dfe60397
MW		 4873 if (!bond_dev) {
4874 printk(KERN_ERR DRV_NAME
4875 ": %s: eek! can't alloc netdev!\n",
4876 name);
4877 res = -ENOMEM;
4878 goto out_rtnl;
4879 }
4880
e4b91c48
JV		 4881 if (!name) {
4882 res = dev_alloc_name(bond_dev, "bond%d");
4883 if (res < 0)
4884 goto out_netdev;
4885 }
4886
dfe60397
MW		 4887 /* bond_init() must be called after dev_alloc_name() (for the
4888 * /proc files), but before register_netdevice(), because we
4889 * need to set function pointers.
4890 */
4891
4892 res = bond_init(bond_dev, params);
4893 if (res < 0) {
4894 goto out_netdev;
4895 }
4896
dfe60397
MW		 4897 res = register_netdevice(bond_dev);
4898 if (res < 0) {
4899 goto out_bond;
4900 }
0daa2303
PZ		 4901
4902 lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
4903
dfe60397
MW		 4904 if (newbond)
4905 *newbond = bond_dev->priv;
4906
ff59c456
JV		 4907 netif_carrier_off(bond_dev);
4908
dfe60397 4909 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 4910 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 4911 if (res < 0) {
4912 rtnl_lock();
4913 goto out_bond;
4914 }
4915
4916 return 0;
4917
dfe60397
MW		 4918out_bond:
4919 bond_deinit(bond_dev);
4920out_netdev:
4921 free_netdev(bond_dev);
4922out_rtnl:
4923 rtnl_unlock();
dfe60397
MW		 4924 return res;
4925}
4926
1da177e4
LT		 4927static int __init bonding_init(void)
4928{
1da177e4
LT		 4929 int i;
4930 int res;
1b76b316 4931 struct bonding *bond, *nxt;
1da177e4
LT		 4932
4933 printk(KERN_INFO "%s", version);
4934
dfe60397 4935 res = bond_check_params(&bonding_defaults);
1da177e4 4936 if (res) {
dfe60397 4937 goto out;
1da177e4
LT		 4938 }
4939
1da177e4
LT		 4940#ifdef CONFIG_PROC_FS
4941 bond_create_proc_dir();
4942#endif
1da177e4 4943 for (i = 0; i < max_bonds; i++) {
e4b91c48 4944 res = bond_create(NULL, &bonding_defaults, NULL);
dfe60397
MW		 4945 if (res)
4946 goto err;
1da177e4
LT		 4947 }
4948
b76cdba9
MW		 4949 res = bond_create_sysfs();
4950 if (res)
4951 goto err;
4952
1da177e4 4953 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4954 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 4955
dfe60397
MW		 4956 goto out;
4957err:
1b76b316
JV		 4958 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4959 bond_work_cancel_all(bond);
4960 destroy_workqueue(bond->wq);
4961 }
4962
40abc270 4963 rtnl_lock();
1da177e4 4964 bond_free_all();
b76cdba9 4965 bond_destroy_sysfs();
1da177e4 4966 rtnl_unlock();
dfe60397 4967out:
1da177e4 4968 return res;
dfe60397 4969
1da177e4
LT		 4970}
4971
4972static void __exit bonding_exit(void)
4973{
4974 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4975 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4
LT		 4976
4977 rtnl_lock();
4978 bond_free_all();
b76cdba9 4979 bond_destroy_sysfs();
1da177e4
LT		 4980 rtnl_unlock();
4981}
4982
4983module_init(bonding_init);
4984module_exit(bonding_exit);
4985MODULE_LICENSE("GPL");
4986MODULE_VERSION(DRV_VERSION);
4987MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
4988MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
4989MODULE_SUPPORTED_DEVICE("most ethernet devices");
4990
4991/*
4992 * Local variables:
4993 * c-indent-level: 8
4994 * c-basic-offset: 8
4995 * tab-width: 8
4996 * End:
4997 */
4998
Clone of davem's net-next-2.6 tree