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1da177e4
LT		 1/*
2 * originally based on the dummy device.
3 *
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
6 *
7 * bonding.c: an Ethernet Bonding driver
8 *
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
10 * Cisco 5500
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
13 * Linux Bonding
14 * and probably many L2 switches ...
15 *
16 * How it works:
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
22 *
23 * ifconfig bond0 down
24 * will release all slaves, marking them as down.
25 *
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
31 *
1da177e4
LT		 32 */
33
34//#define BONDING_DEBUG 1
35
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 */
2543331d 1749 write_unlock_bh(&bond->lock);
1da177e4 1750 bond_alb_deinit_slave(bond, slave);
2543331d 1751 write_lock_bh(&bond->lock);
1da177e4
LT		 1752 }
1753
059fe7a5
JV		 1754 if (oldcurrent == slave) {
1755 /*
1756 * Note that we hold RTNL over this sequence, so there
1757 * is no concern that another slave add/remove event
1758 * will interfere.
1759 */
1760 write_unlock_bh(&bond->lock);
1761 read_lock(&bond->lock);
1762 write_lock_bh(&bond->curr_slave_lock);
1763
1da177e4
LT		 1764 bond_select_active_slave(bond);
1765
059fe7a5
JV		 1766 write_unlock_bh(&bond->curr_slave_lock);
1767 read_unlock(&bond->lock);
1768 write_lock_bh(&bond->lock);
1769 }
1770
1da177e4 1771 if (bond->slave_cnt == 0) {
ff59c456
JV		 1772 bond_set_carrier(bond);
1773
1da177e4
LT		 1774 /* if the last slave was removed, zero the mac address
1775 * of the master so it will be set by the application
1776 * to the mac address of the first slave
1777 */
1778 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1779
1780 if (list_empty(&bond->vlan_list)) {
1781 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1782 } else {
1783 printk(KERN_WARNING DRV_NAME
4e0952c7 1784 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1785 "still has VLANs.\n",
4e0952c7 1786 bond_dev->name, bond_dev->name);
1da177e4 1787 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1788 ": %s: When re-adding slaves, make sure the bond's "
1789 "HW address matches its VLANs'.\n",
1790 bond_dev->name);
1da177e4
LT		 1791 }
1792 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1793 !bond_has_challenged_slaves(bond)) {
1794 printk(KERN_INFO DRV_NAME
4e0952c7 1795 ": %s: last VLAN challenged slave %s "
1da177e4 1796 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1797 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1798 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1799 }
1800
1801 write_unlock_bh(&bond->lock);
1802
b76cdba9
MW		 1803 /* must do this from outside any spinlocks */
1804 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1805
1da177e4
LT		 1806 bond_del_vlans_from_slave(bond, slave_dev);
1807
1808 /* If the mode USES_PRIMARY, then we should only remove its
1809 * promisc and mc settings if it was the curr_active_slave, but that was
1810 * already taken care of above when we detached the slave
1811 */
1812 if (!USES_PRIMARY(bond->params.mode)) {
1813 /* unset promiscuity level from slave */
1814 if (bond_dev->flags & IFF_PROMISC) {
1815 dev_set_promiscuity(slave_dev, -1);
1816 }
1817
1818 /* unset allmulti level from slave */
1819 if (bond_dev->flags & IFF_ALLMULTI) {
1820 dev_set_allmulti(slave_dev, -1);
1821 }
1822
1823 /* flush master's mc_list from slave */
1824 bond_mc_list_flush(bond_dev, slave_dev);
1825 }
1826
1827 netdev_set_master(slave_dev, NULL);
1828
1829 /* close slave before restoring its mac address */
1830 dev_close(slave_dev);
1831
dd957c57 1832 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1833 /* restore original ("permanent") mac address */
1834 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1835 addr.sa_family = slave_dev->type;
1836 dev_set_mac_address(slave_dev, &addr);
1837 }
1da177e4 1838
8f903c70 1839 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1840 IFF_SLAVE_INACTIVE | IFF_BONDING |
1841 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1842
1843 kfree(slave);
1844
1845 return 0; /* deletion OK */
1846}
1847
d90a162a
MS		 1848/*
1849* Destroy a bonding device.
1850* Must be under rtnl_lock when this function is called.
1851*/
1852void bond_destroy(struct bonding *bond)
1853{
1854 bond_deinit(bond->dev);
1855 bond_destroy_sysfs_entry(bond);
8cbdeec6 1856 unregister_netdevice(bond->dev);
d90a162a
MS		 1857}
1858
1859/*
1860* First release a slave and than destroy the bond if no more slaves iare left.
1861* Must be under rtnl_lock when this function is called.
1862*/
1863int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1864{
1865 struct bonding *bond = bond_dev->priv;
1866 int ret;
1867
1868 ret = bond_release(bond_dev, slave_dev);
1869 if ((ret == 0) && (bond->slave_cnt == 0)) {
1870 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1871 bond_dev->name, bond_dev->name);
1872 bond_destroy(bond);
1873 }
1874 return ret;
1875}
1876
1da177e4
LT		 1877/*
1878 * This function releases all slaves.
1879 */
1880static int bond_release_all(struct net_device *bond_dev)
1881{
1882 struct bonding *bond = bond_dev->priv;
1883 struct slave *slave;
1884 struct net_device *slave_dev;
1885 struct sockaddr addr;
1886
1887 write_lock_bh(&bond->lock);
1888
ff59c456
JV		 1889 netif_carrier_off(bond_dev);
1890
1da177e4
LT		 1891 if (bond->slave_cnt == 0) {
1892 goto out;
1893 }
1894
1895 bond->current_arp_slave = NULL;
1896 bond->primary_slave = NULL;
1897 bond_change_active_slave(bond, NULL);
1898
1899 while ((slave = bond->first_slave) != NULL) {
1900 /* Inform AD package of unbinding of slave
1901 * before slave is detached from the list.
1902 */
1903 if (bond->params.mode == BOND_MODE_8023AD) {
1904 bond_3ad_unbind_slave(slave);
1905 }
1906
1907 slave_dev = slave->dev;
1908 bond_detach_slave(bond, slave);
1909
2543331d
JV		 1910 /* now that the slave is detached, unlock and perform
1911 * all the undo steps that should not be called from
1912 * within a lock.
1913 */
1914 write_unlock_bh(&bond->lock);
1915
1da177e4
LT		 1916 if ((bond->params.mode == BOND_MODE_TLB) ||
1917 (bond->params.mode == BOND_MODE_ALB)) {
1918 /* must be called only after the slave
1919 * has been detached from the list
1920 */
1921 bond_alb_deinit_slave(bond, slave);
1922 }
1923
8531c5ff
AK		 1924 bond_compute_features(bond);
1925
b76cdba9 1926 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 1927 bond_del_vlans_from_slave(bond, slave_dev);
1928
1929 /* If the mode USES_PRIMARY, then we should only remove its
1930 * promisc and mc settings if it was the curr_active_slave, but that was
1931 * already taken care of above when we detached the slave
1932 */
1933 if (!USES_PRIMARY(bond->params.mode)) {
1934 /* unset promiscuity level from slave */
1935 if (bond_dev->flags & IFF_PROMISC) {
1936 dev_set_promiscuity(slave_dev, -1);
1937 }
1938
1939 /* unset allmulti level from slave */
1940 if (bond_dev->flags & IFF_ALLMULTI) {
1941 dev_set_allmulti(slave_dev, -1);
1942 }
1943
1944 /* flush master's mc_list from slave */
1945 bond_mc_list_flush(bond_dev, slave_dev);
1946 }
1947
1948 netdev_set_master(slave_dev, NULL);
1949
1950 /* close slave before restoring its mac address */
1951 dev_close(slave_dev);
1952
dd957c57 1953 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1954 /* restore original ("permanent") mac address*/
1955 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1956 addr.sa_family = slave_dev->type;
1957 dev_set_mac_address(slave_dev, &addr);
1958 }
1da177e4 1959
8f903c70
JV		 1960 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
1961 IFF_SLAVE_INACTIVE);
1da177e4
LT		 1962
1963 kfree(slave);
1964
1965 /* re-acquire the lock before getting the next slave */
1966 write_lock_bh(&bond->lock);
1967 }
1968
1969 /* zero the mac address of the master so it will be
1970 * set by the application to the mac address of the
1971 * first slave
1972 */
1973 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1974
1975 if (list_empty(&bond->vlan_list)) {
1976 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1977 } else {
1978 printk(KERN_WARNING DRV_NAME
4e0952c7 1979 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1980 "still has VLANs.\n",
4e0952c7 1981 bond_dev->name, bond_dev->name);
1da177e4 1982 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1983 ": %s: When re-adding slaves, make sure the bond's "
1984 "HW address matches its VLANs'.\n",
1985 bond_dev->name);
1da177e4
LT		 1986 }
1987
1988 printk(KERN_INFO DRV_NAME
1989 ": %s: released all slaves\n",
1990 bond_dev->name);
1991
1992out:
1993 write_unlock_bh(&bond->lock);
1994
1995 return 0;
1996}
1997
1998/*
1999 * This function changes the active slave to slave <slave_dev>.
2000 * It returns -EINVAL in the following cases.
2001 * - <slave_dev> is not found in the list.
2002 * - There is not active slave now.
2003 * - <slave_dev> is already active.
2004 * - The link state of <slave_dev> is not BOND_LINK_UP.
2005 * - <slave_dev> is not running.
2006 * In these cases, this fuction does nothing.
2007 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2008 */
2009static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2010{
2011 struct bonding *bond = bond_dev->priv;
2012 struct slave *old_active = NULL;
2013 struct slave *new_active = NULL;
2014 int res = 0;
2015
2016 if (!USES_PRIMARY(bond->params.mode)) {
2017 return -EINVAL;
2018 }
2019
2020 /* Verify that master_dev is indeed the master of slave_dev */
2021 if (!(slave_dev->flags & IFF_SLAVE) ||
2022 (slave_dev->master != bond_dev)) {
2023 return -EINVAL;
2024 }
2025
059fe7a5 2026 read_lock(&bond->lock);
1da177e4 2027
059fe7a5 2028 read_lock(&bond->curr_slave_lock);
1da177e4 2029 old_active = bond->curr_active_slave;
059fe7a5
JV		 2030 read_unlock(&bond->curr_slave_lock);
2031
1da177e4
LT		 2032 new_active = bond_get_slave_by_dev(bond, slave_dev);
2033
2034 /*
2035 * Changing to the current active: do nothing; return success.
2036 */
2037 if (new_active && (new_active == old_active)) {
059fe7a5 2038 read_unlock(&bond->lock);
1da177e4
LT		 2039 return 0;
2040 }
2041
2042 if ((new_active) &&
2043 (old_active) &&
2044 (new_active->link == BOND_LINK_UP) &&
2045 IS_UP(new_active->dev)) {
059fe7a5 2046 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2047 bond_change_active_slave(bond, new_active);
059fe7a5 2048 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2049 } else {
2050 res = -EINVAL;
2051 }
2052
059fe7a5 2053 read_unlock(&bond->lock);
1da177e4
LT		 2054
2055 return res;
2056}
2057
1da177e4
LT		 2058static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2059{
2060 struct bonding *bond = bond_dev->priv;
2061
2062 info->bond_mode = bond->params.mode;
2063 info->miimon = bond->params.miimon;
2064
6603a6f2 2065 read_lock(&bond->lock);
1da177e4 2066 info->num_slaves = bond->slave_cnt;
6603a6f2 2067 read_unlock(&bond->lock);
1da177e4
LT		 2068
2069 return 0;
2070}
2071
2072static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2073{
2074 struct bonding *bond = bond_dev->priv;
2075 struct slave *slave;
2076 int i, found = 0;
2077
2078 if (info->slave_id < 0) {
2079 return -ENODEV;
2080 }
2081
6603a6f2 2082 read_lock(&bond->lock);
1da177e4
LT		 2083
2084 bond_for_each_slave(bond, slave, i) {
2085 if (i == (int)info->slave_id) {
2086 found = 1;
2087 break;
2088 }
2089 }
2090
6603a6f2 2091 read_unlock(&bond->lock);
1da177e4
LT		 2092
2093 if (found) {
2094 strcpy(info->slave_name, slave->dev->name);
2095 info->link = slave->link;
2096 info->state = slave->state;
2097 info->link_failure_count = slave->link_failure_count;
2098 } else {
2099 return -ENODEV;
2100 }
2101
2102 return 0;
2103}
2104
2105/*-------------------------------- Monitoring -------------------------------*/
2106
0b0eef66
JV		 2107/*
2108 * if !have_locks, return nonzero if a failover is necessary. if
2109 * have_locks, do whatever failover activities are needed.
2110 *
2111 * This is to separate the inspection and failover steps for locking
2112 * purposes; failover requires rtnl, but acquiring it for every
2113 * inspection is undesirable, so a wrapper first does inspection, and
2114 * the acquires the necessary locks and calls again to perform
2115 * failover if needed. Since all locks are dropped, a complete
2116 * restart is needed between calls.
2117 */
2118static int __bond_mii_monitor(struct bonding *bond, int have_locks)
1da177e4 2119{
1da177e4
LT		 2120 struct slave *slave, *oldcurrent;
2121 int do_failover = 0;
1da177e4
LT		 2122 int i;
2123
0b0eef66 2124 if (bond->slave_cnt == 0)
1da177e4 2125 goto out;
1da177e4
LT		 2126
2127 /* we will try to read the link status of each of our slaves, and
2128 * set their IFF_RUNNING flag appropriately. For each slave not
2129 * supporting MII status, we won't do anything so that a user-space
2130 * program could monitor the link itself if needed.
2131 */
2132
1053f62c
MS		 2133 if (bond->send_grat_arp) {
2134 if (bond->curr_active_slave && test_bit(__LINK_STATE_LINKWATCH_PENDING,
2135 &bond->curr_active_slave->dev->state))
2136 dprintk("Needs to send gratuitous arp but not yet\n");
2137 else {
2138 dprintk("sending delayed gratuitous arp on on %s\n",
2139 bond->curr_active_slave->dev->name);
2140 bond_send_gratuitous_arp(bond);
2141 bond->send_grat_arp = 0;
2142 }
2143 }
1da177e4
LT		 2144 read_lock(&bond->curr_slave_lock);
2145 oldcurrent = bond->curr_active_slave;
2146 read_unlock(&bond->curr_slave_lock);
2147
2148 bond_for_each_slave(bond, slave, i) {
2149 struct net_device *slave_dev = slave->dev;
2150 int link_state;
2151 u16 old_speed = slave->speed;
2152 u8 old_duplex = slave->duplex;
2153
2154 link_state = bond_check_dev_link(bond, slave_dev, 0);
2155
2156 switch (slave->link) {
2157 case BOND_LINK_UP: /* the link was up */
2158 if (link_state == BMSR_LSTATUS) {
059fe7a5
JV		 2159 if (!oldcurrent) {
2160 if (!have_locks)
2161 return 1;
2162 do_failover = 1;
2163 }
1da177e4
LT		 2164 break;
2165 } else { /* link going down */
2166 slave->link = BOND_LINK_FAIL;
2167 slave->delay = bond->params.downdelay;
2168
2169 if (slave->link_failure_count < UINT_MAX) {
2170 slave->link_failure_count++;
2171 }
2172
2173 if (bond->params.downdelay) {
2174 printk(KERN_INFO DRV_NAME
2175 ": %s: link status down for %s "
2176 "interface %s, disabling it in "
2177 "%d ms.\n",
1b76b316 2178 bond->dev->name,
1da177e4
LT		 2179 IS_UP(slave_dev)
2180 ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP)
2181 ? ((slave == oldcurrent)
2182 ? "active " : "backup ")
2183 : "")
2184 : "idle ",
2185 slave_dev->name,
2186 bond->params.downdelay * bond->params.miimon);
2187 }
2188 }
2189 /* no break ! fall through the BOND_LINK_FAIL test to
2190 ensure proper action to be taken
2191 */
2192 case BOND_LINK_FAIL: /* the link has just gone down */
2193 if (link_state != BMSR_LSTATUS) {
2194 /* link stays down */
2195 if (slave->delay <= 0) {
0b0eef66
JV		 2196 if (!have_locks)
2197 return 1;
2198
1da177e4
LT		 2199 /* link down for too long time */
2200 slave->link = BOND_LINK_DOWN;
2201
2202 /* in active/backup mode, we must
2203 * completely disable this interface
2204 */
2205 if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) ||
2206 (bond->params.mode == BOND_MODE_8023AD)) {
2207 bond_set_slave_inactive_flags(slave);
2208 }
2209
2210 printk(KERN_INFO DRV_NAME
2211 ": %s: link status definitely "
2212 "down for interface %s, "
2213 "disabling it\n",
1b76b316 2214 bond->dev->name,
1da177e4
LT		 2215 slave_dev->name);
2216
2217 /* notify ad that the link status has changed */
2218 if (bond->params.mode == BOND_MODE_8023AD) {
2219 bond_3ad_handle_link_change(slave, BOND_LINK_DOWN);
2220 }
2221
2222 if ((bond->params.mode == BOND_MODE_TLB) ||
2223 (bond->params.mode == BOND_MODE_ALB)) {
2224 bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN);
2225 }
2226
2227 if (slave == oldcurrent) {
2228 do_failover = 1;
2229 }
2230 } else {
2231 slave->delay--;
2232 }
2233 } else {
2234 /* link up again */
2235 slave->link = BOND_LINK_UP;
2236 slave->jiffies = jiffies;
2237 printk(KERN_INFO DRV_NAME
2238 ": %s: link status up again after %d "
2239 "ms for interface %s.\n",
1b76b316 2240 bond->dev->name,
1da177e4
LT		 2241 (bond->params.downdelay - slave->delay) * bond->params.miimon,
2242 slave_dev->name);
2243 }
2244 break;
2245 case BOND_LINK_DOWN: /* the link was down */
2246 if (link_state != BMSR_LSTATUS) {
2247 /* the link stays down, nothing more to do */
2248 break;
2249 } else { /* link going up */
2250 slave->link = BOND_LINK_BACK;
2251 slave->delay = bond->params.updelay;
2252
2253 if (bond->params.updelay) {
2254 /* if updelay == 0, no need to
2255 advertise about a 0 ms delay */
2256 printk(KERN_INFO DRV_NAME
2257 ": %s: link status up for "
2258 "interface %s, enabling it "
2259 "in %d ms.\n",
1b76b316 2260 bond->dev->name,
1da177e4
LT		 2261 slave_dev->name,
2262 bond->params.updelay * bond->params.miimon);
2263 }
2264 }
2265 /* no break ! fall through the BOND_LINK_BACK state in
2266 case there's something to do.
2267 */
2268 case BOND_LINK_BACK: /* the link has just come back */
2269 if (link_state != BMSR_LSTATUS) {
2270 /* link down again */
2271 slave->link = BOND_LINK_DOWN;
2272
2273 printk(KERN_INFO DRV_NAME
2274 ": %s: link status down again after %d "
2275 "ms for interface %s.\n",
1b76b316 2276 bond->dev->name,
1da177e4
LT		 2277 (bond->params.updelay - slave->delay) * bond->params.miimon,
2278 slave_dev->name);
2279 } else {
2280 /* link stays up */
2281 if (slave->delay == 0) {
0b0eef66
JV		 2282 if (!have_locks)
2283 return 1;
2284
1da177e4
LT		 2285 /* now the link has been up for long time enough */
2286 slave->link = BOND_LINK_UP;
2287 slave->jiffies = jiffies;
2288
2289 if (bond->params.mode == BOND_MODE_8023AD) {
2290 /* prevent it from being the active one */
2291 slave->state = BOND_STATE_BACKUP;
2292 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2293 /* make it immediately active */
2294 slave->state = BOND_STATE_ACTIVE;
2295 } else if (slave != bond->primary_slave) {
2296 /* prevent it from being the active one */
2297 slave->state = BOND_STATE_BACKUP;
2298 }
2299
2300 printk(KERN_INFO DRV_NAME
2301 ": %s: link status definitely "
2302 "up for interface %s.\n",
1b76b316 2303 bond->dev->name,
1da177e4
LT		 2304 slave_dev->name);
2305
2306 /* notify ad that the link status has changed */
2307 if (bond->params.mode == BOND_MODE_8023AD) {
2308 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2309 }
2310
2311 if ((bond->params.mode == BOND_MODE_TLB) ||
2312 (bond->params.mode == BOND_MODE_ALB)) {
2313 bond_alb_handle_link_change(bond, slave, BOND_LINK_UP);
2314 }
2315
2316 if ((!oldcurrent) ||
2317 (slave == bond->primary_slave)) {
2318 do_failover = 1;
2319 }
2320 } else {
2321 slave->delay--;
2322 }
2323 }
2324 break;
2325 default:
2326 /* Should not happen */
4e0952c7
MW		 2327 printk(KERN_ERR DRV_NAME
2328 ": %s: Error: %s Illegal value (link=%d)\n",
1b76b316 2329 bond->dev->name,
4e0952c7
MW		 2330 slave->dev->name,
2331 slave->link);
1da177e4
LT		 2332 goto out;
2333 } /* end of switch (slave->link) */
2334
2335 bond_update_speed_duplex(slave);
2336
2337 if (bond->params.mode == BOND_MODE_8023AD) {
2338 if (old_speed != slave->speed) {
2339 bond_3ad_adapter_speed_changed(slave);
2340 }
2341
2342 if (old_duplex != slave->duplex) {
2343 bond_3ad_adapter_duplex_changed(slave);
2344 }
2345 }
2346
2347 } /* end of for */
2348
2349 if (do_failover) {
059fe7a5
JV		 2350 ASSERT_RTNL();
2351
2352 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2353
2354 bond_select_active_slave(bond);
2355
059fe7a5
JV		 2356 write_unlock_bh(&bond->curr_slave_lock);
2357
ff59c456
JV		 2358 } else
2359 bond_set_carrier(bond);
1da177e4 2360
1da177e4 2361out:
0b0eef66 2362 return 0;
1da177e4
LT		 2363}
2364
0b0eef66
JV		 2365/*
2366 * bond_mii_monitor
2367 *
2368 * Really a wrapper that splits the mii monitor into two phases: an
2369 * inspection, then (if inspection indicates something needs to be
2370 * done) an acquisition of appropriate locks followed by another pass
2371 * to implement whatever link state changes are indicated.
2372 */
2373void bond_mii_monitor(struct work_struct *work)
2374{
2375 struct bonding *bond = container_of(work, struct bonding,
2376 mii_work.work);
2377 unsigned long delay;
2378
2379 read_lock(&bond->lock);
2380 if (bond->kill_timers) {
2381 read_unlock(&bond->lock);
2382 return;
2383 }
2384 if (__bond_mii_monitor(bond, 0)) {
2385 read_unlock(&bond->lock);
2386 rtnl_lock();
2387 read_lock(&bond->lock);
2388 __bond_mii_monitor(bond, 1);
5655662d
JV		 2389 read_unlock(&bond->lock);
2390 rtnl_unlock(); /* might sleep, hold no other locks */
2391 read_lock(&bond->lock);
0b0eef66
JV		 2392 }
2393
2394 delay = ((bond->params.miimon * HZ) / 1000) ? : 1;
2395 read_unlock(&bond->lock);
2396 queue_delayed_work(bond->wq, &bond->mii_work, delay);
2397}
c3ade5ca 2398
d3bb52b0 2399static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2400{
2401 struct in_device *idev;
2402 struct in_ifaddr *ifa;
a144ea4b 2403 __be32 addr = 0;
c3ade5ca
JV		 2404
2405 if (!dev)
2406 return 0;
2407
2408 rcu_read_lock();
e5ed6399 2409 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2410 if (!idev)
2411 goto out;
2412
2413 ifa = idev->ifa_list;
2414 if (!ifa)
2415 goto out;
2416
2417 addr = ifa->ifa_local;
2418out:
2419 rcu_read_unlock();
2420 return addr;
2421}
2422
2423static int bond_has_ip(struct bonding *bond)
2424{
2425 struct vlan_entry *vlan, *vlan_next;
2426
2427 if (bond->master_ip)
2428 return 1;
2429
2430 if (list_empty(&bond->vlan_list))
2431 return 0;
2432
2433 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2434 vlan_list) {
2435 if (vlan->vlan_ip)
2436 return 1;
2437 }
2438
2439 return 0;
2440}
2441
d3bb52b0 2442static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966
JV		 2443{
2444 struct vlan_entry *vlan, *vlan_next;
2445
2446 if (ip == bond->master_ip)
2447 return 1;
2448
2449 if (list_empty(&bond->vlan_list))
2450 return 0;
2451
2452 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2453 vlan_list) {
2454 if (ip == vlan->vlan_ip)
2455 return 1;
2456 }
2457
2458 return 0;
2459}
2460
c3ade5ca
JV		 2461/*
2462 * We go to the (large) trouble of VLAN tagging ARP frames because
2463 * switches in VLAN mode (especially if ports are configured as
2464 * "native" to a VLAN) might not pass non-tagged frames.
2465 */
d3bb52b0 2466static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2467{
2468 struct sk_buff *skb;
2469
2470 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2471 slave_dev->name, dest_ip, src_ip, vlan_id);
2472
2473 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2474 NULL, slave_dev->dev_addr, NULL);
2475
2476 if (!skb) {
2477 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2478 return;
2479 }
2480 if (vlan_id) {
2481 skb = vlan_put_tag(skb, vlan_id);
2482 if (!skb) {
2483 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2484 return;
2485 }
2486 }
2487 arp_xmit(skb);
2488}
2489
2490
1da177e4
LT		 2491static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2492{
c3ade5ca 2493 int i, vlan_id, rv;
d3bb52b0 2494 __be32 *targets = bond->params.arp_targets;
c3ade5ca
JV		 2495 struct vlan_entry *vlan, *vlan_next;
2496 struct net_device *vlan_dev;
2497 struct flowi fl;
2498 struct rtable *rt;
1da177e4 2499
6b780567
MW		 2500 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2501 if (!targets[i])
2502 continue;
c3ade5ca
JV		 2503 dprintk("basa: target %x\n", targets[i]);
2504 if (list_empty(&bond->vlan_list)) {
2505 dprintk("basa: empty vlan: arp_send\n");
2506 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2507 bond->master_ip, 0);
2508 continue;
2509 }
2510
2511 /*
2512 * If VLANs are configured, we do a route lookup to
2513 * determine which VLAN interface would be used, so we
2514 * can tag the ARP with the proper VLAN tag.
2515 */
2516 memset(&fl, 0, sizeof(fl));
2517 fl.fl4_dst = targets[i];
2518 fl.fl4_tos = RTO_ONLINK;
2519
f206351a 2520 rv = ip_route_output_key(&init_net, &rt, &fl);
c3ade5ca
JV		 2521 if (rv) {
2522 if (net_ratelimit()) {
2523 printk(KERN_WARNING DRV_NAME
2524 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2525 bond->dev->name, NIPQUAD(fl.fl4_dst));
2526 }
2527 continue;
2528 }
2529
2530 /*
2531 * This target is not on a VLAN
2532 */
2533 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2534 ip_rt_put(rt);
c3ade5ca
JV		 2535 dprintk("basa: rtdev == bond->dev: arp_send\n");
2536 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2537 bond->master_ip, 0);
2538 continue;
2539 }
2540
2541 vlan_id = 0;
2542 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
2543 vlan_list) {
5c15bdec 2544 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2545 if (vlan_dev == rt->u.dst.dev) {
2546 vlan_id = vlan->vlan_id;
2547 dprintk("basa: vlan match on %s %d\n",
2548 vlan_dev->name, vlan_id);
2549 break;
2550 }
2551 }
2552
2553 if (vlan_id) {
ed4b9f80 2554 ip_rt_put(rt);
c3ade5ca
JV		 2555 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2556 vlan->vlan_ip, vlan_id);
2557 continue;
2558 }
2559
2560 if (net_ratelimit()) {
2561 printk(KERN_WARNING DRV_NAME
2562 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2563 bond->dev->name, NIPQUAD(fl.fl4_dst),
2564 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2565 }
ed4b9f80 2566 ip_rt_put(rt);
c3ade5ca
JV		 2567 }
2568}
2569
2570/*
2571 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2572 * for each VLAN above us.
2573 */
2574static void bond_send_gratuitous_arp(struct bonding *bond)
2575{
2576 struct slave *slave = bond->curr_active_slave;
2577 struct vlan_entry *vlan;
2578 struct net_device *vlan_dev;
2579
2580 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2581 slave ? slave->dev->name : "NULL");
2582 if (!slave)
2583 return;
2584
2585 if (bond->master_ip) {
2586 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2587 bond->master_ip, 0);
c3ade5ca
JV		 2588 }
2589
2590 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2591 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2592 if (vlan->vlan_ip) {
2593 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2594 vlan->vlan_ip, vlan->vlan_id);
2595 }
1da177e4
LT		 2596 }
2597}
2598
d3bb52b0 2599static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2600{
2601 int i;
d3bb52b0 2602 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2603
2604 targets = bond->params.arp_targets;
2605 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2606 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2607 "%u.%u.%u.%u bhti(tip) %d\n",
2608 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2609 bond_has_this_ip(bond, tip));
2610 if (sip == targets[i]) {
2611 if (bond_has_this_ip(bond, tip))
2612 slave->last_arp_rx = jiffies;
2613 return;
2614 }
2615 }
2616}
2617
2618static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2619{
2620 struct arphdr *arp;
2621 struct slave *slave;
2622 struct bonding *bond;
2623 unsigned char *arp_ptr;
d3bb52b0 2624 __be32 sip, tip;
f5b2b966 2625
e730c155
EB		 2626 if (dev->nd_net != &init_net)
2627 goto out;
2628
f5b2b966
JV		 2629 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2630 goto out;
2631
2632 bond = dev->priv;
2633 read_lock(&bond->lock);
2634
2635 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2636 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2637 orig_dev ? orig_dev->name : "NULL");
2638
2639 slave = bond_get_slave_by_dev(bond, orig_dev);
2640 if (!slave || !slave_do_arp_validate(bond, slave))
2641 goto out_unlock;
2642
2643 /* ARP header, plus 2 device addresses, plus 2 IP addresses. */
2644 if (!pskb_may_pull(skb, (sizeof(struct arphdr) +
2645 (2 * dev->addr_len) +
2646 (2 * sizeof(u32)))))
2647 goto out_unlock;
2648
d0a92be0 2649 arp = arp_hdr(skb);
f5b2b966
JV		 2650 if (arp->ar_hln != dev->addr_len ||
2651 skb->pkt_type == PACKET_OTHERHOST ||
2652 skb->pkt_type == PACKET_LOOPBACK ||
2653 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2654 arp->ar_pro != htons(ETH_P_IP) ||
2655 arp->ar_pln != 4)
2656 goto out_unlock;
2657
2658 arp_ptr = (unsigned char *)(arp + 1);
2659 arp_ptr += dev->addr_len;
2660 memcpy(&sip, arp_ptr, 4);
2661 arp_ptr += 4 + dev->addr_len;
2662 memcpy(&tip, arp_ptr, 4);
2663
2664 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2665 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2666 slave->state, bond->params.arp_validate,
2667 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2668
2669 /*
2670 * Backup slaves won't see the ARP reply, but do come through
2671 * here for each ARP probe (so we swap the sip/tip to validate
2672 * the probe). In a "redundant switch, common router" type of
2673 * configuration, the ARP probe will (hopefully) travel from
2674 * the active, through one switch, the router, then the other
2675 * switch before reaching the backup.
2676 */
2677 if (slave->state == BOND_STATE_ACTIVE)
2678 bond_validate_arp(bond, slave, sip, tip);
2679 else
2680 bond_validate_arp(bond, slave, tip, sip);
2681
2682out_unlock:
2683 read_unlock(&bond->lock);
2684out:
2685 dev_kfree_skb(skb);
2686 return NET_RX_SUCCESS;
2687}
2688
1da177e4
LT		 2689/*
2690 * this function is called regularly to monitor each slave's link
2691 * ensuring that traffic is being sent and received when arp monitoring
2692 * is used in load-balancing mode. if the adapter has been dormant, then an
2693 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2694 * arp monitoring in active backup mode.
2695 */
1b76b316 2696void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2697{
1b76b316
JV		 2698 struct bonding *bond = container_of(work, struct bonding,
2699 arp_work.work);
1da177e4
LT		 2700 struct slave *slave, *oldcurrent;
2701 int do_failover = 0;
2702 int delta_in_ticks;
2703 int i;
2704
2705 read_lock(&bond->lock);
2706
2707 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2708
2709 if (bond->kill_timers) {
2710 goto out;
2711 }
2712
2713 if (bond->slave_cnt == 0) {
2714 goto re_arm;
2715 }
2716
2717 read_lock(&bond->curr_slave_lock);
2718 oldcurrent = bond->curr_active_slave;
2719 read_unlock(&bond->curr_slave_lock);
2720
2721 /* see if any of the previous devices are up now (i.e. they have
2722 * xmt and rcv traffic). the curr_active_slave does not come into
2723 * the picture unless it is null. also, slave->jiffies is not needed
2724 * here because we send an arp on each slave and give a slave as
2725 * long as it needs to get the tx/rx within the delta.
2726 * TODO: what about up/down delay in arp mode? it wasn't here before
2727 * so it can wait
2728 */
2729 bond_for_each_slave(bond, slave, i) {
2730 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2731 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2732 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2733
2734 slave->link = BOND_LINK_UP;
2735 slave->state = BOND_STATE_ACTIVE;
2736
2737 /* primary_slave has no meaning in round-robin
2738 * mode. the window of a slave being up and
2739 * curr_active_slave being null after enslaving
2740 * is closed.
2741 */
2742 if (!oldcurrent) {
2743 printk(KERN_INFO DRV_NAME
2744 ": %s: link status definitely "
2745 "up for interface %s, ",
1b76b316 2746 bond->dev->name,
1da177e4
LT		 2747 slave->dev->name);
2748 do_failover = 1;
2749 } else {
2750 printk(KERN_INFO DRV_NAME
2751 ": %s: interface %s is now up\n",
1b76b316 2752 bond->dev->name,
1da177e4
LT		 2753 slave->dev->name);
2754 }
2755 }
2756 } else {
2757 /* slave->link == BOND_LINK_UP */
2758
2759 /* not all switches will respond to an arp request
2760 * when the source ip is 0, so don't take the link down
2761 * if we don't know our ip yet
2762 */
b63bb739
DS		 2763 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
2764 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks) &&
c3ade5ca 2765 bond_has_ip(bond))) {
1da177e4
LT		 2766
2767 slave->link = BOND_LINK_DOWN;
2768 slave->state = BOND_STATE_BACKUP;
2769
2770 if (slave->link_failure_count < UINT_MAX) {
2771 slave->link_failure_count++;
2772 }
2773
2774 printk(KERN_INFO DRV_NAME
2775 ": %s: interface %s is now down.\n",
1b76b316 2776 bond->dev->name,
1da177e4
LT		 2777 slave->dev->name);
2778
2779 if (slave == oldcurrent) {
2780 do_failover = 1;
2781 }
2782 }
2783 }
2784
2785 /* note: if switch is in round-robin mode, all links
2786 * must tx arp to ensure all links rx an arp - otherwise
2787 * links may oscillate or not come up at all; if switch is
2788 * in something like xor mode, there is nothing we can
2789 * do - all replies will be rx'ed on same link causing slaves
2790 * to be unstable during low/no traffic periods
2791 */
2792 if (IS_UP(slave->dev)) {
2793 bond_arp_send_all(bond, slave);
2794 }
2795 }
2796
2797 if (do_failover) {
059fe7a5
JV		 2798 rtnl_lock();
2799 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2800
2801 bond_select_active_slave(bond);
2802
059fe7a5
JV		 2803 write_unlock_bh(&bond->curr_slave_lock);
2804 rtnl_unlock();
2805
1da177e4
LT		 2806 }
2807
2808re_arm:
1b76b316
JV		 2809 if (bond->params.arp_interval)
2810 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2811out:
2812 read_unlock(&bond->lock);
2813}
2814
2815/*
2816 * When using arp monitoring in active-backup mode, this function is
2817 * called to determine if any backup slaves have went down or a new
2818 * current slave needs to be found.
2819 * The backup slaves never generate traffic, they are considered up by merely
2820 * receiving traffic. If the current slave goes down, each backup slave will
2821 * be given the opportunity to tx/rx an arp before being taken down - this
2822 * prevents all slaves from being taken down due to the current slave not
2823 * sending any traffic for the backups to receive. The arps are not necessarily
2824 * necessary, any tx and rx traffic will keep the current slave up. While any
2825 * rx traffic will keep the backup slaves up, the current slave is responsible
2826 * for generating traffic to keep them up regardless of any other traffic they
2827 * may have received.
2828 * see loadbalance_arp_monitor for arp monitoring in load balancing mode
2829 */
1b76b316 2830void bond_activebackup_arp_mon(struct work_struct *work)
1da177e4 2831{
1b76b316
JV		 2832 struct bonding *bond = container_of(work, struct bonding,
2833 arp_work.work);
1da177e4
LT		 2834 struct slave *slave;
2835 int delta_in_ticks;
2836 int i;
2837
2838 read_lock(&bond->lock);
2839
2840 delta_in_ticks = (bond->params.arp_interval * HZ) / 1000;
2841
2842 if (bond->kill_timers) {
2843 goto out;
2844 }
2845
2846 if (bond->slave_cnt == 0) {
2847 goto re_arm;
2848 }
2849
2850 /* determine if any slave has come up or any backup slave has
2851 * gone down
2852 * TODO: what about up/down delay in arp mode? it wasn't here before
2853 * so it can wait
2854 */
2855 bond_for_each_slave(bond, slave, i) {
2856 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2857 if (time_before_eq(jiffies,
2858 slave_last_rx(bond, slave) + delta_in_ticks)) {
1da177e4
LT		 2859
2860 slave->link = BOND_LINK_UP;
2861
059fe7a5
JV		 2862 rtnl_lock();
2863
2864 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2865
2866 if ((!bond->curr_active_slave) &&
b63bb739 2867 time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks)) {
1da177e4
LT		 2868 bond_change_active_slave(bond, slave);
2869 bond->current_arp_slave = NULL;
2870 } else if (bond->curr_active_slave != slave) {
2871 /* this slave has just come up but we
2872 * already have a current slave; this
2873 * can also happen if bond_enslave adds
2874 * a new slave that is up while we are
2875 * searching for a new slave
2876 */
2877 bond_set_slave_inactive_flags(slave);
2878 bond->current_arp_slave = NULL;
2879 }
2880
ff59c456
JV		 2881 bond_set_carrier(bond);
2882
1da177e4
LT		 2883 if (slave == bond->curr_active_slave) {
2884 printk(KERN_INFO DRV_NAME
2885 ": %s: %s is up and now the "
2886 "active interface\n",
1b76b316 2887 bond->dev->name,
1da177e4 2888 slave->dev->name);
ff59c456 2889 netif_carrier_on(bond->dev);
1da177e4
LT		 2890 } else {
2891 printk(KERN_INFO DRV_NAME
2892 ": %s: backup interface %s is "
2893 "now up\n",
1b76b316 2894 bond->dev->name,
1da177e4
LT		 2895 slave->dev->name);
2896 }
2897
059fe7a5
JV		 2898 write_unlock_bh(&bond->curr_slave_lock);
2899 rtnl_unlock();
1da177e4
LT		 2900 }
2901 } else {
2902 read_lock(&bond->curr_slave_lock);
2903
2904 if ((slave != bond->curr_active_slave) &&
2905 (!bond->current_arp_slave) &&
b63bb739 2906 (time_after_eq(jiffies, slave_last_rx(bond, slave) + 3*delta_in_ticks) &&
c3ade5ca 2907 bond_has_ip(bond))) {
1da177e4
LT		 2908 /* a backup slave has gone down; three times
2909 * the delta allows the current slave to be
2910 * taken out before the backup slave.
2911 * note: a non-null current_arp_slave indicates
2912 * the curr_active_slave went down and we are
2913 * searching for a new one; under this
2914 * condition we only take the curr_active_slave
2915 * down - this gives each slave a chance to
2916 * tx/rx traffic before being taken out
2917 */
2918
2919 read_unlock(&bond->curr_slave_lock);
2920
2921 slave->link = BOND_LINK_DOWN;
2922
2923 if (slave->link_failure_count < UINT_MAX) {
2924 slave->link_failure_count++;
2925 }
2926
2927 bond_set_slave_inactive_flags(slave);
2928
2929 printk(KERN_INFO DRV_NAME
2930 ": %s: backup interface %s is now down\n",
1b76b316 2931 bond->dev->name,
1da177e4
LT		 2932 slave->dev->name);
2933 } else {
2934 read_unlock(&bond->curr_slave_lock);
2935 }
2936 }
2937 }
2938
2939 read_lock(&bond->curr_slave_lock);
2940 slave = bond->curr_active_slave;
2941 read_unlock(&bond->curr_slave_lock);
2942
2943 if (slave) {
2944 /* if we have sent traffic in the past 2*arp_intervals but
2945 * haven't xmit and rx traffic in that time interval, select
2946 * a different slave. slave->jiffies is only updated when
2947 * a slave first becomes the curr_active_slave - not necessarily
2948 * after every arp; this ensures the slave has a full 2*delta
2949 * before being taken out. if a primary is being used, check
2950 * if it is up and needs to take over as the curr_active_slave
2951 */
b63bb739
DS		 2952 if ((time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
2953 (time_after_eq(jiffies, slave_last_rx(bond, slave) + 2*delta_in_ticks) &&
2954 bond_has_ip(bond))) &&
2955 time_after_eq(jiffies, slave->jiffies + 2*delta_in_ticks)) {
1da177e4
LT		 2956
2957 slave->link = BOND_LINK_DOWN;
2958
2959 if (slave->link_failure_count < UINT_MAX) {
2960 slave->link_failure_count++;
2961 }
2962
2963 printk(KERN_INFO DRV_NAME
2964 ": %s: link status down for active interface "
2965 "%s, disabling it\n",
1b76b316 2966 bond->dev->name,
1da177e4
LT		 2967 slave->dev->name);
2968
059fe7a5
JV		 2969 rtnl_lock();
2970 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2971
2972 bond_select_active_slave(bond);
2973 slave = bond->curr_active_slave;
2974
059fe7a5
JV		 2975 write_unlock_bh(&bond->curr_slave_lock);
2976
2977 rtnl_unlock();
1da177e4
LT		 2978
2979 bond->current_arp_slave = slave;
2980
2981 if (slave) {
2982 slave->jiffies = jiffies;
2983 }
2984 } else if ((bond->primary_slave) &&
2985 (bond->primary_slave != slave) &&
2986 (bond->primary_slave->link == BOND_LINK_UP)) {
2987 /* at this point, slave is the curr_active_slave */
2988 printk(KERN_INFO DRV_NAME
2989 ": %s: changing from interface %s to primary "
2990 "interface %s\n",
1b76b316 2991 bond->dev->name,
1da177e4
LT		 2992 slave->dev->name,
2993 bond->primary_slave->dev->name);
2994
2995 /* primary is up so switch to it */
059fe7a5
JV		 2996 rtnl_lock();
2997 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2998 bond_change_active_slave(bond, bond->primary_slave);
059fe7a5
JV		 2999 write_unlock_bh(&bond->curr_slave_lock);
3000
3001 rtnl_unlock();
1da177e4
LT		 3002
3003 slave = bond->primary_slave;
3004 slave->jiffies = jiffies;
3005 } else {
3006 bond->current_arp_slave = NULL;
3007 }
3008
3009 /* the current slave must tx an arp to ensure backup slaves
3010 * rx traffic
3011 */
c3ade5ca 3012 if (slave && bond_has_ip(bond)) {
1da177e4
LT		 3013 bond_arp_send_all(bond, slave);
3014 }
3015 }
3016
3017 /* if we don't have a curr_active_slave, search for the next available
3018 * backup slave from the current_arp_slave and make it the candidate
3019 * for becoming the curr_active_slave
3020 */
3021 if (!slave) {
3022 if (!bond->current_arp_slave) {
3023 bond->current_arp_slave = bond->first_slave;
3024 }
3025
3026 if (bond->current_arp_slave) {
3027 bond_set_slave_inactive_flags(bond->current_arp_slave);
3028
3029 /* search for next candidate */
2f872f04 3030 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
1da177e4
LT		 3031 if (IS_UP(slave->dev)) {
3032 slave->link = BOND_LINK_BACK;
3033 bond_set_slave_active_flags(slave);
3034 bond_arp_send_all(bond, slave);
3035 slave->jiffies = jiffies;
3036 bond->current_arp_slave = slave;
3037 break;
3038 }
3039
3040 /* if the link state is up at this point, we
3041 * mark it down - this can happen if we have
3042 * simultaneous link failures and
3043 * reselect_active_interface doesn't make this
3044 * one the current slave so it is still marked
3045 * up when it is actually down
3046 */
3047 if (slave->link == BOND_LINK_UP) {
3048 slave->link = BOND_LINK_DOWN;
3049 if (slave->link_failure_count < UINT_MAX) {
3050 slave->link_failure_count++;
3051 }
3052
3053 bond_set_slave_inactive_flags(slave);
3054
3055 printk(KERN_INFO DRV_NAME
3056 ": %s: backup interface %s is "
3057 "now down.\n",
1b76b316 3058 bond->dev->name,
1da177e4
LT		 3059 slave->dev->name);
3060 }
3061 }
3062 }
3063 }
3064
3065re_arm:
3066 if (bond->params.arp_interval) {
1b76b316 3067 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3068 }
3069out:
3070 read_unlock(&bond->lock);
3071}
3072
3073/*------------------------------ proc/seq_file-------------------------------*/
3074
3075#ifdef CONFIG_PROC_FS
3076
3077#define SEQ_START_TOKEN ((void *)1)
3078
3079static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3080{
3081 struct bonding *bond = seq->private;
3082 loff_t off = 0;
3083 struct slave *slave;
3084 int i;
3085
3086 /* make sure the bond won't be taken away */
3087 read_lock(&dev_base_lock);
6603a6f2 3088 read_lock(&bond->lock);
1da177e4
LT		 3089
3090 if (*pos == 0) {
3091 return SEQ_START_TOKEN;
3092 }
3093
3094 bond_for_each_slave(bond, slave, i) {
3095 if (++off == *pos) {
3096 return slave;
3097 }
3098 }
3099
3100 return NULL;
3101}
3102
3103static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3104{
3105 struct bonding *bond = seq->private;
3106 struct slave *slave = v;
3107
3108 ++*pos;
3109 if (v == SEQ_START_TOKEN) {
3110 return bond->first_slave;
3111 }
3112
3113 slave = slave->next;
3114
3115 return (slave == bond->first_slave) ? NULL : slave;
3116}
3117
3118static void bond_info_seq_stop(struct seq_file *seq, void *v)
3119{
3120 struct bonding *bond = seq->private;
3121
6603a6f2 3122 read_unlock(&bond->lock);
1da177e4
LT		 3123 read_unlock(&dev_base_lock);
3124}
3125
3126static void bond_info_show_master(struct seq_file *seq)
3127{
3128 struct bonding *bond = seq->private;
3129 struct slave *curr;
4756b02f
MW		 3130 int i;
3131 u32 target;
1da177e4
LT		 3132
3133 read_lock(&bond->curr_slave_lock);
3134 curr = bond->curr_active_slave;
3135 read_unlock(&bond->curr_slave_lock);
3136
dd957c57 3137 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3138 bond_mode_name(bond->params.mode));
3139
dd957c57
JV		 3140 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3141 bond->params.fail_over_mac)
3142 seq_printf(seq, " (fail_over_mac)");
3143
3144 seq_printf(seq, "\n");
3145
c61b75ad
MW		 3146 if (bond->params.mode == BOND_MODE_XOR ||
3147 bond->params.mode == BOND_MODE_8023AD) {
3148 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3149 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3150 bond->params.xmit_policy);
3151 }
3152
1da177e4
LT		 3153 if (USES_PRIMARY(bond->params.mode)) {
3154 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3155 (bond->primary_slave) ?
3156 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3157
3158 seq_printf(seq, "Currently Active Slave: %s\n",
3159 (curr) ? curr->dev->name : "None");
3160 }
3161
ff59c456
JV		 3162 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3163 "up" : "down");
1da177e4
LT		 3164 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3165 seq_printf(seq, "Up Delay (ms): %d\n",
3166 bond->params.updelay * bond->params.miimon);
3167 seq_printf(seq, "Down Delay (ms): %d\n",
3168 bond->params.downdelay * bond->params.miimon);
3169
4756b02f
MW		 3170
3171 /* ARP information */
3172 if(bond->params.arp_interval > 0) {
3173 int printed=0;
3174 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3175 bond->params.arp_interval);
3176
3177 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3178
3179 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3180 if (!bond->params.arp_targets[i])
3181 continue;
3182 if (printed)
3183 seq_printf(seq, ",");
3184 target = ntohl(bond->params.arp_targets[i]);
3185 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3186 printed = 1;
3187 }
3188 seq_printf(seq, "\n");
3189 }
3190
1da177e4
LT		 3191 if (bond->params.mode == BOND_MODE_8023AD) {
3192 struct ad_info ad_info;
0795af57 3193 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3194
3195 seq_puts(seq, "\n802.3ad info\n");
3196 seq_printf(seq, "LACP rate: %s\n",
3197 (bond->params.lacp_fast) ? "fast" : "slow");
3198
3199 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3200 seq_printf(seq, "bond %s has no active aggregator\n",
3201 bond->dev->name);
3202 } else {
3203 seq_printf(seq, "Active Aggregator Info:\n");
3204
3205 seq_printf(seq, "\tAggregator ID: %d\n",
3206 ad_info.aggregator_id);
3207 seq_printf(seq, "\tNumber of ports: %d\n",
3208 ad_info.ports);
3209 seq_printf(seq, "\tActor Key: %d\n",
3210 ad_info.actor_key);
3211 seq_printf(seq, "\tPartner Key: %d\n",
3212 ad_info.partner_key);
0795af57
JP		 3213 seq_printf(seq, "\tPartner Mac Address: %s\n",
3214 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3215 }
3216 }
3217}
3218
3219static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3220{
3221 struct bonding *bond = seq->private;
0795af57 3222 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3223
3224 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3225 seq_printf(seq, "MII Status: %s\n",
3226 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3227 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3228 slave->link_failure_count);
3229
217df670 3230 seq_printf(seq,
0795af57
JP		 3231 "Permanent HW addr: %s\n",
3232 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3233
3234 if (bond->params.mode == BOND_MODE_8023AD) {
3235 const struct aggregator *agg
3236 = SLAVE_AD_INFO(slave).port.aggregator;
3237
3238 if (agg) {
3239 seq_printf(seq, "Aggregator ID: %d\n",
3240 agg->aggregator_identifier);
3241 } else {
3242 seq_puts(seq, "Aggregator ID: N/A\n");
3243 }
3244 }
3245}
3246
3247static int bond_info_seq_show(struct seq_file *seq, void *v)
3248{
3249 if (v == SEQ_START_TOKEN) {
3250 seq_printf(seq, "%s\n", version);
3251 bond_info_show_master(seq);
3252 } else {
3253 bond_info_show_slave(seq, v);
3254 }
3255
3256 return 0;
3257}
3258
3259static struct seq_operations bond_info_seq_ops = {
3260 .start = bond_info_seq_start,
3261 .next = bond_info_seq_next,
3262 .stop = bond_info_seq_stop,
3263 .show = bond_info_seq_show,
3264};
3265
3266static int bond_info_open(struct inode *inode, struct file *file)
3267{
3268 struct seq_file *seq;
3269 struct proc_dir_entry *proc;
3270 int res;
3271
3272 res = seq_open(file, &bond_info_seq_ops);
3273 if (!res) {
3274 /* recover the pointer buried in proc_dir_entry data */
3275 seq = file->private_data;
3276 proc = PDE(inode);
3277 seq->private = proc->data;
3278 }
3279
3280 return res;
3281}
3282
d54b1fdb 3283static const struct file_operations bond_info_fops = {
1da177e4
LT		 3284 .owner = THIS_MODULE,
3285 .open = bond_info_open,
3286 .read = seq_read,
3287 .llseek = seq_lseek,
3288 .release = seq_release,
3289};
3290
3291static int bond_create_proc_entry(struct bonding *bond)
3292{
3293 struct net_device *bond_dev = bond->dev;
3294
3295 if (bond_proc_dir) {
3296 bond->proc_entry = create_proc_entry(bond_dev->name,
3297 S_IRUGO,
3298 bond_proc_dir);
3299 if (bond->proc_entry == NULL) {
3300 printk(KERN_WARNING DRV_NAME
3301 ": Warning: Cannot create /proc/net/%s/%s\n",
3302 DRV_NAME, bond_dev->name);
3303 } else {
3304 bond->proc_entry->data = bond;
3305 bond->proc_entry->proc_fops = &bond_info_fops;
3306 bond->proc_entry->owner = THIS_MODULE;
3307 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3308 }
3309 }
3310
3311 return 0;
3312}
3313
3314static void bond_remove_proc_entry(struct bonding *bond)
3315{
3316 if (bond_proc_dir && bond->proc_entry) {
3317 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3318 memset(bond->proc_file_name, 0, IFNAMSIZ);
3319 bond->proc_entry = NULL;
3320 }
3321}
3322
3323/* Create the bonding directory under /proc/net, if doesn't exist yet.
3324 * Caller must hold rtnl_lock.
3325 */
3326static void bond_create_proc_dir(void)
3327{
3328 int len = strlen(DRV_NAME);
3329
457c4cbc 3330 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3331 bond_proc_dir = bond_proc_dir->next) {
3332 if ((bond_proc_dir->namelen == len) &&
3333 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3334 break;
3335 }
3336 }
3337
3338 if (!bond_proc_dir) {
457c4cbc 3339 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3340 if (bond_proc_dir) {
3341 bond_proc_dir->owner = THIS_MODULE;
3342 } else {
3343 printk(KERN_WARNING DRV_NAME
3344 ": Warning: cannot create /proc/net/%s\n",
3345 DRV_NAME);
3346 }
3347 }
3348}
3349
3350/* Destroy the bonding directory under /proc/net, if empty.
3351 * Caller must hold rtnl_lock.
3352 */
3353static void bond_destroy_proc_dir(void)
3354{
3355 struct proc_dir_entry *de;
3356
3357 if (!bond_proc_dir) {
3358 return;
3359 }
3360
3361 /* verify that the /proc dir is empty */
3362 for (de = bond_proc_dir->subdir; de; de = de->next) {
3363 /* ignore . and .. */
3364 if (*(de->name) != '.') {
3365 break;
3366 }
3367 }
3368
3369 if (de) {
3370 if (bond_proc_dir->owner == THIS_MODULE) {
3371 bond_proc_dir->owner = NULL;
3372 }
3373 } else {
457c4cbc 3374 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3375 bond_proc_dir = NULL;
3376 }
3377}
3378#endif /* CONFIG_PROC_FS */
3379
3380/*-------------------------- netdev event handling --------------------------*/
3381
3382/*
3383 * Change device name
3384 */
3385static int bond_event_changename(struct bonding *bond)
3386{
3387#ifdef CONFIG_PROC_FS
3388 bond_remove_proc_entry(bond);
3389 bond_create_proc_entry(bond);
3390#endif
b76cdba9
MW		 3391 down_write(&(bonding_rwsem));
3392 bond_destroy_sysfs_entry(bond);
3393 bond_create_sysfs_entry(bond);
3394 up_write(&(bonding_rwsem));
1da177e4
LT		 3395 return NOTIFY_DONE;
3396}
3397
3398static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3399{
3400 struct bonding *event_bond = bond_dev->priv;
3401
3402 switch (event) {
3403 case NETDEV_CHANGENAME:
3404 return bond_event_changename(event_bond);
3405 case NETDEV_UNREGISTER:
3b96c858 3406 bond_release_all(event_bond->dev);
1da177e4
LT		 3407 break;
3408 default:
3409 break;
3410 }
3411
3412 return NOTIFY_DONE;
3413}
3414
3415static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3416{
3417 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3418 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3419
3420 switch (event) {
3421 case NETDEV_UNREGISTER:
3422 if (bond_dev) {
1284cd3a
JV		 3423 if (bond->setup_by_slave)
3424 bond_release_and_destroy(bond_dev, slave_dev);
3425 else
3426 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3427 }
3428 break;
3429 case NETDEV_CHANGE:
3430 /*
3431 * TODO: is this what we get if somebody
3432 * sets up a hierarchical bond, then rmmod's
3433 * one of the slave bonding devices?
3434 */
3435 break;
3436 case NETDEV_DOWN:
3437 /*
3438 * ... Or is it this?
3439 */
3440 break;
3441 case NETDEV_CHANGEMTU:
3442 /*
3443 * TODO: Should slaves be allowed to
3444 * independently alter their MTU? For
3445 * an active-backup bond, slaves need
3446 * not be the same type of device, so
3447 * MTUs may vary. For other modes,
3448 * slaves arguably should have the
3449 * same MTUs. To do this, we'd need to
3450 * take over the slave's change_mtu
3451 * function for the duration of their
3452 * servitude.
3453 */
3454 break;
3455 case NETDEV_CHANGENAME:
3456 /*
3457 * TODO: handle changing the primary's name
3458 */
3459 break;
8531c5ff
AK		 3460 case NETDEV_FEAT_CHANGE:
3461 bond_compute_features(bond);
3462 break;
1da177e4
LT		 3463 default:
3464 break;
3465 }
3466
3467 return NOTIFY_DONE;
3468}
3469
3470/*
3471 * bond_netdev_event: handle netdev notifier chain events.
3472 *
3473 * This function receives events for the netdev chain. The caller (an
e041c683 3474 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3475 * locks for us to safely manipulate the slave devices (RTNL lock,
3476 * dev_probe_lock).
3477 */
3478static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3479{
3480 struct net_device *event_dev = (struct net_device *)ptr;
3481
e9dc8653
EB		 3482 if (event_dev->nd_net != &init_net)
3483 return NOTIFY_DONE;
3484
1da177e4
LT		 3485 dprintk("event_dev: %s, event: %lx\n",
3486 (event_dev ? event_dev->name : "None"),
3487 event);
3488
0b680e75
JV		 3489 if (!(event_dev->priv_flags & IFF_BONDING))
3490 return NOTIFY_DONE;
3491
1da177e4
LT		 3492 if (event_dev->flags & IFF_MASTER) {
3493 dprintk("IFF_MASTER\n");
3494 return bond_master_netdev_event(event, event_dev);
3495 }
3496
3497 if (event_dev->flags & IFF_SLAVE) {
3498 dprintk("IFF_SLAVE\n");
3499 return bond_slave_netdev_event(event, event_dev);
3500 }
3501
3502 return NOTIFY_DONE;
3503}
3504
c3ade5ca
JV		 3505/*
3506 * bond_inetaddr_event: handle inetaddr notifier chain events.
3507 *
3508 * We keep track of device IPs primarily to use as source addresses in
3509 * ARP monitor probes (rather than spewing out broadcasts all the time).
3510 *
3511 * We track one IP for the main device (if it has one), plus one per VLAN.
3512 */
3513static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3514{
3515 struct in_ifaddr *ifa = ptr;
3516 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
3517 struct bonding *bond, *bond_next;
3518 struct vlan_entry *vlan, *vlan_next;
3519
3520 list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) {
3521 if (bond->dev == event_dev) {
3522 switch (event) {
3523 case NETDEV_UP:
3524 bond->master_ip = ifa->ifa_local;
3525 return NOTIFY_OK;
3526 case NETDEV_DOWN:
3527 bond->master_ip = bond_glean_dev_ip(bond->dev);
3528 return NOTIFY_OK;
3529 default:
3530 return NOTIFY_DONE;
3531 }
3532 }
3533
3534 if (list_empty(&bond->vlan_list))
3535 continue;
3536
3537 list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list,
3538 vlan_list) {
5c15bdec 3539 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3540 if (vlan_dev == event_dev) {
3541 switch (event) {
3542 case NETDEV_UP:
3543 vlan->vlan_ip = ifa->ifa_local;
3544 return NOTIFY_OK;
3545 case NETDEV_DOWN:
3546 vlan->vlan_ip =
3547 bond_glean_dev_ip(vlan_dev);
3548 return NOTIFY_OK;
3549 default:
3550 return NOTIFY_DONE;
3551 }
3552 }
3553 }
3554 }
3555 return NOTIFY_DONE;
3556}
3557
1da177e4
LT		 3558static struct notifier_block bond_netdev_notifier = {
3559 .notifier_call = bond_netdev_event,
3560};
3561
c3ade5ca
JV		 3562static struct notifier_block bond_inetaddr_notifier = {
3563 .notifier_call = bond_inetaddr_event,
3564};
3565
1da177e4
LT		 3566/*-------------------------- Packet type handling ---------------------------*/
3567
3568/* register to receive lacpdus on a bond */
3569static void bond_register_lacpdu(struct bonding *bond)
3570{
3571 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3572
3573 /* initialize packet type */
3574 pk_type->type = PKT_TYPE_LACPDU;
3575 pk_type->dev = bond->dev;
3576 pk_type->func = bond_3ad_lacpdu_recv;
3577
3578 dev_add_pack(pk_type);
3579}
3580
3581/* unregister to receive lacpdus on a bond */
3582static void bond_unregister_lacpdu(struct bonding *bond)
3583{
3584 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3585}
3586
f5b2b966
JV		 3587void bond_register_arp(struct bonding *bond)
3588{
3589 struct packet_type *pt = &bond->arp_mon_pt;
3590
c4f283b1
JV		 3591 if (pt->type)
3592 return;
3593
f5b2b966 3594 pt->type = htons(ETH_P_ARP);
e245cb71 3595 pt->dev = bond->dev;
f5b2b966
JV		 3596 pt->func = bond_arp_rcv;
3597 dev_add_pack(pt);
3598}
3599
3600void bond_unregister_arp(struct bonding *bond)
3601{
c4f283b1
JV		 3602 struct packet_type *pt = &bond->arp_mon_pt;
3603
3604 dev_remove_pack(pt);
3605 pt->type = 0;
f5b2b966
JV		 3606}
3607
169a3e66
JV		 3608/*---------------------------- Hashing Policies -----------------------------*/
3609
6f6652be
JV		 3610/*
3611 * Hash for the output device based upon layer 2 and layer 3 data. If
3612 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3613 */
3614static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3615 struct net_device *bond_dev, int count)
3616{
3617 struct ethhdr *data = (struct ethhdr *)skb->data;
3618 struct iphdr *iph = ip_hdr(skb);
3619
3620 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3621 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3622 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3623 }
3624
3625 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3626}
3627
169a3e66 3628/*
59c51591 3629 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3630 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3631 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3632 */
3633static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3634 struct net_device *bond_dev, int count)
3635{
3636 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3637 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3638 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3639 int layer4_xor = 0;
3640
3641 if (skb->protocol == __constant_htons(ETH_P_IP)) {
3642 if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) &&
3643 (iph->protocol == IPPROTO_TCP ||
3644 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3645 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3646 }
3647 return (layer4_xor ^
3648 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3649
3650 }
3651
3652 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3653}
3654
3655/*
3656 * Hash for the output device based upon layer 2 data
3657 */
3658static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3659 struct net_device *bond_dev, int count)
3660{
3661 struct ethhdr *data = (struct ethhdr *)skb->data;
3662
3663 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3664}
3665
1da177e4
LT		 3666/*-------------------------- Device entry points ----------------------------*/
3667
3668static int bond_open(struct net_device *bond_dev)
3669{
3670 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3671
3672 bond->kill_timers = 0;
3673
3674 if ((bond->params.mode == BOND_MODE_TLB) ||
3675 (bond->params.mode == BOND_MODE_ALB)) {
1da177e4
LT		 3676 /* bond_alb_initialize must be called before the timer
3677 * is started.
3678 */
3679 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3680 /* something went wrong - fail the open operation */
3681 return -1;
3682 }
3683
1b76b316
JV		 3684 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3685 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3686 }
3687
3688 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3689 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3690 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3691 }
3692
3693 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3694 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3695 INIT_DELAYED_WORK(&bond->arp_work,
3696 bond_activebackup_arp_mon);
3697 else
3698 INIT_DELAYED_WORK(&bond->arp_work,
3699 bond_loadbalance_arp_mon);
3700
3701 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3702 if (bond->params.arp_validate)
3703 bond_register_arp(bond);
1da177e4
LT		 3704 }
3705
3706 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3707 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3708 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3709 /* register to receive LACPDUs */
3710 bond_register_lacpdu(bond);
3711 }
3712
3713 return 0;
3714}
3715
3716static int bond_close(struct net_device *bond_dev)
3717{
3718 struct bonding *bond = bond_dev->priv;
3719
3720 if (bond->params.mode == BOND_MODE_8023AD) {
3721 /* Unregister the receive of LACPDUs */
3722 bond_unregister_lacpdu(bond);
3723 }
3724
f5b2b966
JV		 3725 if (bond->params.arp_validate)
3726 bond_unregister_arp(bond);
3727
1da177e4
LT		 3728 write_lock_bh(&bond->lock);
3729
1da177e4
LT		 3730
3731 /* signal timers not to re-arm */
3732 bond->kill_timers = 1;
3733
3734 write_unlock_bh(&bond->lock);
3735
1da177e4 3736 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3737 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3738 }
3739
3740 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3741 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3742 }
3743
3744 switch (bond->params.mode) {
3745 case BOND_MODE_8023AD:
1b76b316 3746 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3747 break;
3748 case BOND_MODE_TLB:
3749 case BOND_MODE_ALB:
1b76b316 3750 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3751 break;
3752 default:
3753 break;
3754 }
3755
1da177e4
LT		 3756
3757 if ((bond->params.mode == BOND_MODE_TLB) ||
3758 (bond->params.mode == BOND_MODE_ALB)) {
3759 /* Must be called only after all
3760 * slaves have been released
3761 */
3762 bond_alb_deinitialize(bond);
3763 }
3764
3765 return 0;
3766}
3767
3768static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3769{
3770 struct bonding *bond = bond_dev->priv;
3771 struct net_device_stats *stats = &(bond->stats), *sstats;
3772 struct slave *slave;
3773 int i;
3774
3775 memset(stats, 0, sizeof(struct net_device_stats));
3776
3777 read_lock_bh(&bond->lock);
3778
3779 bond_for_each_slave(bond, slave, i) {
c45d286e 3780 sstats = slave->dev->get_stats(slave->dev);
5a1b5898
RR		 3781 stats->rx_packets += sstats->rx_packets;
3782 stats->rx_bytes += sstats->rx_bytes;
3783 stats->rx_errors += sstats->rx_errors;
3784 stats->rx_dropped += sstats->rx_dropped;
3785
3786 stats->tx_packets += sstats->tx_packets;
3787 stats->tx_bytes += sstats->tx_bytes;
3788 stats->tx_errors += sstats->tx_errors;
3789 stats->tx_dropped += sstats->tx_dropped;
3790
3791 stats->multicast += sstats->multicast;
3792 stats->collisions += sstats->collisions;
3793
3794 stats->rx_length_errors += sstats->rx_length_errors;
3795 stats->rx_over_errors += sstats->rx_over_errors;
3796 stats->rx_crc_errors += sstats->rx_crc_errors;
3797 stats->rx_frame_errors += sstats->rx_frame_errors;
3798 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3799 stats->rx_missed_errors += sstats->rx_missed_errors;
3800
3801 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3802 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3803 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3804 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3805 stats->tx_window_errors += sstats->tx_window_errors;
1da177e4
LT		 3806 }
3807
3808 read_unlock_bh(&bond->lock);
3809
3810 return stats;
3811}
3812
3813static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3814{
3815 struct net_device *slave_dev = NULL;
3816 struct ifbond k_binfo;
3817 struct ifbond __user *u_binfo = NULL;
3818 struct ifslave k_sinfo;
3819 struct ifslave __user *u_sinfo = NULL;
3820 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3821 int res = 0;
3822
3823 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3824 bond_dev->name, cmd);
3825
3826 switch (cmd) {
1da177e4
LT		 3827 case SIOCGMIIPHY:
3828 mii = if_mii(ifr);
3829 if (!mii) {
3830 return -EINVAL;
3831 }
3832 mii->phy_id = 0;
3833 /* Fall Through */
3834 case SIOCGMIIREG:
3835 /*
3836 * We do this again just in case we were called by SIOCGMIIREG
3837 * instead of SIOCGMIIPHY.
3838 */
3839 mii = if_mii(ifr);
3840 if (!mii) {
3841 return -EINVAL;
3842 }
3843
3844 if (mii->reg_num == 1) {
3845 struct bonding *bond = bond_dev->priv;
3846 mii->val_out = 0;
6603a6f2 3847 read_lock(&bond->lock);
1da177e4 3848 read_lock(&bond->curr_slave_lock);
4e140079 3849 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3850 mii->val_out = BMSR_LSTATUS;
3851 }
3852 read_unlock(&bond->curr_slave_lock);
6603a6f2 3853 read_unlock(&bond->lock);
1da177e4
LT		 3854 }
3855
3856 return 0;
3857 case BOND_INFO_QUERY_OLD:
3858 case SIOCBONDINFOQUERY:
3859 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3860
3861 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3862 return -EFAULT;
3863 }
3864
3865 res = bond_info_query(bond_dev, &k_binfo);
3866 if (res == 0) {
3867 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3868 return -EFAULT;
3869 }
3870 }
3871
3872 return res;
3873 case BOND_SLAVE_INFO_QUERY_OLD:
3874 case SIOCBONDSLAVEINFOQUERY:
3875 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3876
3877 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3878 return -EFAULT;
3879 }
3880
3881 res = bond_slave_info_query(bond_dev, &k_sinfo);
3882 if (res == 0) {
3883 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3884 return -EFAULT;
3885 }
3886 }
3887
3888 return res;
3889 default:
3890 /* Go on */
3891 break;
3892 }
3893
3894 if (!capable(CAP_NET_ADMIN)) {
3895 return -EPERM;
3896 }
3897
b76cdba9 3898 down_write(&(bonding_rwsem));
881d966b 3899 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3900
3901 dprintk("slave_dev=%p: \n", slave_dev);
3902
3903 if (!slave_dev) {
3904 res = -ENODEV;
3905 } else {
3906 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3907 switch (cmd) {
3908 case BOND_ENSLAVE_OLD:
3909 case SIOCBONDENSLAVE:
3910 res = bond_enslave(bond_dev, slave_dev);
3911 break;
3912 case BOND_RELEASE_OLD:
3913 case SIOCBONDRELEASE:
3914 res = bond_release(bond_dev, slave_dev);
3915 break;
3916 case BOND_SETHWADDR_OLD:
3917 case SIOCBONDSETHWADDR:
3918 res = bond_sethwaddr(bond_dev, slave_dev);
3919 break;
3920 case BOND_CHANGE_ACTIVE_OLD:
3921 case SIOCBONDCHANGEACTIVE:
3922 res = bond_ioctl_change_active(bond_dev, slave_dev);
3923 break;
3924 default:
3925 res = -EOPNOTSUPP;
3926 }
3927
3928 dev_put(slave_dev);
3929 }
3930
b76cdba9 3931 up_write(&(bonding_rwsem));
1da177e4
LT		 3932 return res;
3933}
3934
3935static void bond_set_multicast_list(struct net_device *bond_dev)
3936{
3937 struct bonding *bond = bond_dev->priv;
3938 struct dev_mc_list *dmi;
3939
3940 write_lock_bh(&bond->lock);
3941
3942 /*
3943 * Do promisc before checking multicast_mode
3944 */
3945 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
3946 bond_set_promiscuity(bond, 1);
3947 }
3948
3949 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
3950 bond_set_promiscuity(bond, -1);
3951 }
3952
3953 /* set allmulti flag to slaves */
3954 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
3955 bond_set_allmulti(bond, 1);
3956 }
3957
3958 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
3959 bond_set_allmulti(bond, -1);
3960 }
3961
3962 bond->flags = bond_dev->flags;
3963
3964 /* looking for addresses to add to slaves' mc list */
3965 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
3966 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
3967 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3968 }
3969 }
3970
3971 /* looking for addresses to delete from slaves' list */
3972 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
3973 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
3974 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
3975 }
3976 }
3977
3978 /* save master's multicast list */
3979 bond_mc_list_destroy(bond);
3980 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
3981
3982 write_unlock_bh(&bond->lock);
3983}
3984
3985/*
3986 * Change the MTU of all of a master's slaves to match the master
3987 */
3988static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
3989{
3990 struct bonding *bond = bond_dev->priv;
3991 struct slave *slave, *stop_at;
3992 int res = 0;
3993 int i;
3994
3995 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
3996 (bond_dev ? bond_dev->name : "None"), new_mtu);
3997
3998 /* Can't hold bond->lock with bh disabled here since
3999 * some base drivers panic. On the other hand we can't
4000 * hold bond->lock without bh disabled because we'll
4001 * deadlock. The only solution is to rely on the fact
4002 * that we're under rtnl_lock here, and the slaves
4003 * list won't change. This doesn't solve the problem
4004 * of setting the slave's MTU while it is
4005 * transmitting, but the assumption is that the base
4006 * driver can handle that.
4007 *
4008 * TODO: figure out a way to safely iterate the slaves
4009 * list, but without holding a lock around the actual
4010 * call to the base driver.
4011 */
4012
4013 bond_for_each_slave(bond, slave, i) {
4014 dprintk("s %p s->p %p c_m %p\n", slave,
4015 slave->prev, slave->dev->change_mtu);
e944ef79 4016
1da177e4
LT		 4017 res = dev_set_mtu(slave->dev, new_mtu);
4018
4019 if (res) {
4020 /* If we failed to set the slave's mtu to the new value
4021 * we must abort the operation even in ACTIVE_BACKUP
4022 * mode, because if we allow the backup slaves to have
4023 * different mtu values than the active slave we'll
4024 * need to change their mtu when doing a failover. That
4025 * means changing their mtu from timer context, which
4026 * is probably not a good idea.
4027 */
4028 dprintk("err %d %s\n", res, slave->dev->name);
4029 goto unwind;
4030 }
4031 }
4032
4033 bond_dev->mtu = new_mtu;
4034
4035 return 0;
4036
4037unwind:
4038 /* unwind from head to the slave that failed */
4039 stop_at = slave;
4040 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4041 int tmp_res;
4042
4043 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4044 if (tmp_res) {
4045 dprintk("unwind err %d dev %s\n", tmp_res,
4046 slave->dev->name);
4047 }
4048 }
4049
4050 return res;
4051}
4052
4053/*
4054 * Change HW address
4055 *
4056 * Note that many devices must be down to change the HW address, and
4057 * downing the master releases all slaves. We can make bonds full of
4058 * bonding devices to test this, however.
4059 */
4060static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4061{
4062 struct bonding *bond = bond_dev->priv;
4063 struct sockaddr *sa = addr, tmp_sa;
4064 struct slave *slave, *stop_at;
4065 int res = 0;
4066 int i;
4067
4068 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4069
dd957c57
JV		 4070 /*
4071 * If fail_over_mac is enabled, do nothing and return success.
4072 * Returning an error causes ifenslave to fail.
4073 */
4074 if (bond->params.fail_over_mac)
4075 return 0;
2ab82852 4076
1da177e4
LT		 4077 if (!is_valid_ether_addr(sa->sa_data)) {
4078 return -EADDRNOTAVAIL;
4079 }
4080
4081 /* Can't hold bond->lock with bh disabled here since
4082 * some base drivers panic. On the other hand we can't
4083 * hold bond->lock without bh disabled because we'll
4084 * deadlock. The only solution is to rely on the fact
4085 * that we're under rtnl_lock here, and the slaves
4086 * list won't change. This doesn't solve the problem
4087 * of setting the slave's hw address while it is
4088 * transmitting, but the assumption is that the base
4089 * driver can handle that.
4090 *
4091 * TODO: figure out a way to safely iterate the slaves
4092 * list, but without holding a lock around the actual
4093 * call to the base driver.
4094 */
4095
4096 bond_for_each_slave(bond, slave, i) {
4097 dprintk("slave %p %s\n", slave, slave->dev->name);
4098
4099 if (slave->dev->set_mac_address == NULL) {
4100 res = -EOPNOTSUPP;
4101 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4102 goto unwind;
4103 }
4104
4105 res = dev_set_mac_address(slave->dev, addr);
4106 if (res) {
4107 /* TODO: consider downing the slave
4108 * and retry ?
4109 * User should expect communications
4110 * breakage anyway until ARP finish
4111 * updating, so...
4112 */
4113 dprintk("err %d %s\n", res, slave->dev->name);
4114 goto unwind;
4115 }
4116 }
4117
4118 /* success */
4119 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4120 return 0;
4121
4122unwind:
4123 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4124 tmp_sa.sa_family = bond_dev->type;
4125
4126 /* unwind from head to the slave that failed */
4127 stop_at = slave;
4128 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4129 int tmp_res;
4130
4131 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4132 if (tmp_res) {
4133 dprintk("unwind err %d dev %s\n", tmp_res,
4134 slave->dev->name);
4135 }
4136 }
4137
4138 return res;
4139}
4140
4141static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4142{
4143 struct bonding *bond = bond_dev->priv;
4144 struct slave *slave, *start_at;
cf5f9044 4145 int i, slave_no, res = 1;
1da177e4
LT		 4146
4147 read_lock(&bond->lock);
4148
4149 if (!BOND_IS_OK(bond)) {
4150 goto out;
4151 }
4152
cf5f9044
JV		 4153 /*
4154 * Concurrent TX may collide on rr_tx_counter; we accept that
4155 * as being rare enough not to justify using an atomic op here
4156 */
4157 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4158
cf5f9044
JV		 4159 bond_for_each_slave(bond, slave, i) {
4160 slave_no--;
4161 if (slave_no < 0) {
4162 break;
4163 }
1da177e4
LT		 4164 }
4165
cf5f9044 4166 start_at = slave;
1da177e4
LT		 4167 bond_for_each_slave_from(bond, slave, i, start_at) {
4168 if (IS_UP(slave->dev) &&
4169 (slave->link == BOND_LINK_UP) &&
4170 (slave->state == BOND_STATE_ACTIVE)) {
4171 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4172 break;
4173 }
4174 }
4175
1da177e4
LT		 4176out:
4177 if (res) {
4178 /* no suitable interface, frame not sent */
4179 dev_kfree_skb(skb);
4180 }
4181 read_unlock(&bond->lock);
4182 return 0;
4183}
4184
075897ce 4185
1da177e4
LT		 4186/*
4187 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4188 * the bond has a usable interface.
4189 */
4190static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4191{
4192 struct bonding *bond = bond_dev->priv;
4193 int res = 1;
4194
1da177e4
LT		 4195 read_lock(&bond->lock);
4196 read_lock(&bond->curr_slave_lock);
4197
4198 if (!BOND_IS_OK(bond)) {
4199 goto out;
4200 }
4201
075897ce
JL		 4202 if (!bond->curr_active_slave)
4203 goto out;
4204
075897ce
JL		 4205 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4206
1da177e4
LT		 4207out:
4208 if (res) {
4209 /* no suitable interface, frame not sent */
4210 dev_kfree_skb(skb);
4211 }
4212 read_unlock(&bond->curr_slave_lock);
4213 read_unlock(&bond->lock);
4214 return 0;
4215}
4216
4217/*
169a3e66
JV		 4218 * In bond_xmit_xor() , we determine the output device by using a pre-
4219 * determined xmit_hash_policy(), If the selected device is not enabled,
4220 * find the next active slave.
1da177e4
LT		 4221 */
4222static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4223{
4224 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4225 struct slave *slave, *start_at;
4226 int slave_no;
4227 int i;
4228 int res = 1;
4229
4230 read_lock(&bond->lock);
4231
4232 if (!BOND_IS_OK(bond)) {
4233 goto out;
4234 }
4235
169a3e66 4236 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4237
4238 bond_for_each_slave(bond, slave, i) {
4239 slave_no--;
4240 if (slave_no < 0) {
4241 break;
4242 }
4243 }
4244
4245 start_at = slave;
4246
4247 bond_for_each_slave_from(bond, slave, i, start_at) {
4248 if (IS_UP(slave->dev) &&
4249 (slave->link == BOND_LINK_UP) &&
4250 (slave->state == BOND_STATE_ACTIVE)) {
4251 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4252 break;
4253 }
4254 }
4255
4256out:
4257 if (res) {
4258 /* no suitable interface, frame not sent */
4259 dev_kfree_skb(skb);
4260 }
4261 read_unlock(&bond->lock);
4262 return 0;
4263}
4264
4265/*
4266 * in broadcast mode, we send everything to all usable interfaces.
4267 */
4268static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4269{
4270 struct bonding *bond = bond_dev->priv;
4271 struct slave *slave, *start_at;
4272 struct net_device *tx_dev = NULL;
4273 int i;
4274 int res = 1;
4275
4276 read_lock(&bond->lock);
4277
4278 if (!BOND_IS_OK(bond)) {
4279 goto out;
4280 }
4281
4282 read_lock(&bond->curr_slave_lock);
4283 start_at = bond->curr_active_slave;
4284 read_unlock(&bond->curr_slave_lock);
4285
4286 if (!start_at) {
4287 goto out;
4288 }
4289
4290 bond_for_each_slave_from(bond, slave, i, start_at) {
4291 if (IS_UP(slave->dev) &&
4292 (slave->link == BOND_LINK_UP) &&
4293 (slave->state == BOND_STATE_ACTIVE)) {
4294 if (tx_dev) {
4295 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4296 if (!skb2) {
4297 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4298 ": %s: Error: bond_xmit_broadcast(): "
4299 "skb_clone() failed\n",
4300 bond_dev->name);
1da177e4
LT		 4301 continue;
4302 }
4303
4304 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4305 if (res) {
4306 dev_kfree_skb(skb2);
4307 continue;
4308 }
4309 }
4310 tx_dev = slave->dev;
4311 }
4312 }
4313
4314 if (tx_dev) {
4315 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4316 }
4317
4318out:
4319 if (res) {
4320 /* no suitable interface, frame not sent */
4321 dev_kfree_skb(skb);
4322 }
4323 /* frame sent to all suitable interfaces */
4324 read_unlock(&bond->lock);
4325 return 0;
4326}
4327
4328/*------------------------- Device initialization ---------------------------*/
4329
6f6652be
JV		 4330static void bond_set_xmit_hash_policy(struct bonding *bond)
4331{
4332 switch (bond->params.xmit_policy) {
4333 case BOND_XMIT_POLICY_LAYER23:
4334 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4335 break;
4336 case BOND_XMIT_POLICY_LAYER34:
4337 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4338 break;
4339 case BOND_XMIT_POLICY_LAYER2:
4340 default:
4341 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4342 break;
4343 }
4344}
4345
1da177e4
LT		 4346/*
4347 * set bond mode specific net device operations
4348 */
a77b5325 4349void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4350{
169a3e66
JV		 4351 struct net_device *bond_dev = bond->dev;
4352
1da177e4
LT		 4353 switch (mode) {
4354 case BOND_MODE_ROUNDROBIN:
4355 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4356 break;
4357 case BOND_MODE_ACTIVEBACKUP:
4358 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4359 break;
4360 case BOND_MODE_XOR:
4361 bond_dev->hard_start_xmit = bond_xmit_xor;
6f6652be 4362 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4363 break;
4364 case BOND_MODE_BROADCAST:
4365 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4366 break;
4367 case BOND_MODE_8023AD:
8f903c70 4368 bond_set_master_3ad_flags(bond);
1da177e4 4369 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
6f6652be 4370 bond_set_xmit_hash_policy(bond);
1da177e4 4371 break;
1da177e4 4372 case BOND_MODE_ALB:
8f903c70
JV		 4373 bond_set_master_alb_flags(bond);
4374 /* FALLTHRU */
4375 case BOND_MODE_TLB:
1da177e4
LT		 4376 bond_dev->hard_start_xmit = bond_alb_xmit;
4377 bond_dev->set_mac_address = bond_alb_set_mac_address;
4378 break;
4379 default:
4380 /* Should never happen, mode already checked */
4381 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4382 ": %s: Error: Unknown bonding mode %d\n",
4383 bond_dev->name,
1da177e4
LT		 4384 mode);
4385 break;
4386 }
4387}
4388
217df670
JV		 4389static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4390 struct ethtool_drvinfo *drvinfo)
4391{
4392 strncpy(drvinfo->driver, DRV_NAME, 32);
4393 strncpy(drvinfo->version, DRV_VERSION, 32);
4394 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4395}
4396
7282d491 4397static const struct ethtool_ops bond_ethtool_ops = {
217df670 4398 .get_drvinfo = bond_ethtool_get_drvinfo,
8531c5ff
AK		 4399};
4400
1da177e4
LT		 4401/*
4402 * Does not allocate but creates a /proc entry.
4403 * Allowed to fail.
4404 */
3c535952 4405static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4406{
4407 struct bonding *bond = bond_dev->priv;
4408
4409 dprintk("Begin bond_init for %s\n", bond_dev->name);
4410
4411 /* initialize rwlocks */
4412 rwlock_init(&bond->lock);
4413 rwlock_init(&bond->curr_slave_lock);
4414
4415 bond->params = *params; /* copy params struct */
4416
1b76b316
JV		 4417 bond->wq = create_singlethread_workqueue(bond_dev->name);
4418 if (!bond->wq)
4419 return -ENOMEM;
4420
1da177e4
LT		 4421 /* Initialize pointers */
4422 bond->first_slave = NULL;
4423 bond->curr_active_slave = NULL;
4424 bond->current_arp_slave = NULL;
4425 bond->primary_slave = NULL;
4426 bond->dev = bond_dev;
1053f62c 4427 bond->send_grat_arp = 0;
d90a162a 4428 bond->setup_by_slave = 0;
1da177e4
LT		 4429 INIT_LIST_HEAD(&bond->vlan_list);
4430
4431 /* Initialize the device entry points */
4432 bond_dev->open = bond_open;
4433 bond_dev->stop = bond_close;
4434 bond_dev->get_stats = bond_get_stats;
4435 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4436 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4437 bond_dev->set_multicast_list = bond_set_multicast_list;
4438 bond_dev->change_mtu = bond_change_mtu;
4439 bond_dev->set_mac_address = bond_set_mac_address;
3a1521b7 4440 bond_dev->validate_addr = NULL;
1da177e4 4441
169a3e66 4442 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4443
4444 bond_dev->destructor = free_netdev;
4445
4446 /* Initialize the device options */
4447 bond_dev->tx_queue_len = 0;
4448 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4449 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4450
4451 /* At first, we block adding VLANs. That's the only way to
4452 * prevent problems that occur when adding VLANs over an
4453 * empty bond. The block will be removed once non-challenged
4454 * slaves are enslaved.
4455 */
4456 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4457
932ff279 4458 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4459 * transmitting */
4460 bond_dev->features |= NETIF_F_LLTX;
4461
4462 /* By default, we declare the bond to be fully
4463 * VLAN hardware accelerated capable. Special
4464 * care is taken in the various xmit functions
4465 * when there are slaves that are not hw accel
4466 * capable
4467 */
4468 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4469 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4470 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4471 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4472 NETIF_F_HW_VLAN_RX |
4473 NETIF_F_HW_VLAN_FILTER);
4474
4475#ifdef CONFIG_PROC_FS
4476 bond_create_proc_entry(bond);
4477#endif
1da177e4
LT		 4478 list_add_tail(&bond->bond_list, &bond_dev_list);
4479
4480 return 0;
4481}
4482
4483/* De-initialize device specific data.
4484 * Caller must hold rtnl_lock.
4485 */
c50b85d0 4486static void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4487{
4488 struct bonding *bond = bond_dev->priv;
4489
4490 list_del(&bond->bond_list);
4491
4492#ifdef CONFIG_PROC_FS
4493 bond_remove_proc_entry(bond);
4494#endif
4495}
4496
fdaea7a9
JV		 4497static void bond_work_cancel_all(struct bonding *bond)
4498{
4499 write_lock_bh(&bond->lock);
4500 bond->kill_timers = 1;
4501 write_unlock_bh(&bond->lock);
4502
4503 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4504 cancel_delayed_work(&bond->mii_work);
4505
4506 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4507 cancel_delayed_work(&bond->arp_work);
4508
4509 if (bond->params.mode == BOND_MODE_ALB &&
4510 delayed_work_pending(&bond->alb_work))
4511 cancel_delayed_work(&bond->alb_work);
4512
4513 if (bond->params.mode == BOND_MODE_8023AD &&
4514 delayed_work_pending(&bond->ad_work))
4515 cancel_delayed_work(&bond->ad_work);
4516}
4517
1da177e4
LT		 4518/* Unregister and free all bond devices.
4519 * Caller must hold rtnl_lock.
4520 */
4521static void bond_free_all(void)
4522{
4523 struct bonding *bond, *nxt;
4524
4525 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4526 struct net_device *bond_dev = bond->dev;
4527
fdaea7a9 4528 bond_work_cancel_all(bond);
70298705 4529 bond_mc_list_destroy(bond);
4530 /* Release the bonded slaves */
4531 bond_release_all(bond_dev);
6603a6f2 4532 bond_deinit(bond_dev);
8cbdeec6 4533 unregister_netdevice(bond_dev);
1da177e4
LT		 4534 }
4535
4536#ifdef CONFIG_PROC_FS
4537 bond_destroy_proc_dir();
4538#endif
4539}
4540
4541/*------------------------- Module initialization ---------------------------*/
4542
4543/*
4544 * Convert string input module parms. Accept either the
ece95f7f
JV		 4545 * number of the mode or its string name. A bit complicated because
4546 * some mode names are substrings of other names, and calls from sysfs
4547 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4548 */
ece95f7f 4549int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
1da177e4 4550{
ece95f7f
JV		 4551 int mode = -1, i, rv;
4552 char modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
4553
4554 rv = sscanf(buf, "%d", &mode);
4555 if (!rv) {
4556 rv = sscanf(buf, "%20s", modestr);
4557 if (!rv)
4558 return -1;
4559 }
1da177e4
LT		 4560
4561 for (i = 0; tbl[i].modename; i++) {
ece95f7f
JV		 4562 if (mode == tbl[i].mode)
4563 return tbl[i].mode;
4564 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4565 return tbl[i].mode;
1da177e4
LT		 4566 }
4567
4568 return -1;
4569}
4570
4571static int bond_check_params(struct bond_params *params)
4572{
f5b2b966
JV		 4573 int arp_validate_value;
4574
1da177e4
LT		 4575 /*
4576 * Convert string parameters.
4577 */
4578 if (mode) {
4579 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4580 if (bond_mode == -1) {
4581 printk(KERN_ERR DRV_NAME
4582 ": Error: Invalid bonding mode \"%s\"\n",
4583 mode == NULL ? "NULL" : mode);
4584 return -EINVAL;
4585 }
4586 }
4587
169a3e66
JV		 4588 if (xmit_hash_policy) {
4589 if ((bond_mode != BOND_MODE_XOR) &&
4590 (bond_mode != BOND_MODE_8023AD)) {
4591 printk(KERN_INFO DRV_NAME
4592 ": xor_mode param is irrelevant in mode %s\n",
4593 bond_mode_name(bond_mode));
4594 } else {
4595 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4596 xmit_hashtype_tbl);
4597 if (xmit_hashtype == -1) {
4598 printk(KERN_ERR DRV_NAME
4599 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4600 xmit_hash_policy == NULL ? "NULL" :
4601 xmit_hash_policy);
4602 return -EINVAL;
4603 }
4604 }
4605 }
4606
1da177e4
LT		 4607 if (lacp_rate) {
4608 if (bond_mode != BOND_MODE_8023AD) {
4609 printk(KERN_INFO DRV_NAME
4610 ": lacp_rate param is irrelevant in mode %s\n",
4611 bond_mode_name(bond_mode));
4612 } else {
4613 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4614 if (lacp_fast == -1) {
4615 printk(KERN_ERR DRV_NAME
4616 ": Error: Invalid lacp rate \"%s\"\n",
4617 lacp_rate == NULL ? "NULL" : lacp_rate);
4618 return -EINVAL;
4619 }
4620 }
4621 }
4622
4623 if (max_bonds < 1 || max_bonds > INT_MAX) {
4624 printk(KERN_WARNING DRV_NAME
4625 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4626 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
1da177e4
LT		 4627 max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS);
4628 max_bonds = BOND_DEFAULT_MAX_BONDS;
4629 }
4630
4631 if (miimon < 0) {
4632 printk(KERN_WARNING DRV_NAME
4633 ": Warning: miimon module parameter (%d), "
4634 "not in range 0-%d, so it was reset to %d\n",
4635 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4636 miimon = BOND_LINK_MON_INTERV;
4637 }
4638
4639 if (updelay < 0) {
4640 printk(KERN_WARNING DRV_NAME
4641 ": Warning: updelay module parameter (%d), "
4642 "not in range 0-%d, so it was reset to 0\n",
4643 updelay, INT_MAX);
4644 updelay = 0;
4645 }
4646
4647 if (downdelay < 0) {
4648 printk(KERN_WARNING DRV_NAME
4649 ": Warning: downdelay module parameter (%d), "
4650 "not in range 0-%d, so it was reset to 0\n",
4651 downdelay, INT_MAX);
4652 downdelay = 0;
4653 }
4654
4655 if ((use_carrier != 0) && (use_carrier != 1)) {
4656 printk(KERN_WARNING DRV_NAME
4657 ": Warning: use_carrier module parameter (%d), "
4658 "not of valid value (0/1), so it was set to 1\n",
4659 use_carrier);
4660 use_carrier = 1;
4661 }
4662
4663 /* reset values for 802.3ad */
4664 if (bond_mode == BOND_MODE_8023AD) {
4665 if (!miimon) {
4666 printk(KERN_WARNING DRV_NAME
4667 ": Warning: miimon must be specified, "
4668 "otherwise bonding will not detect link "
4669 "failure, speed and duplex which are "
4670 "essential for 802.3ad operation\n");
4671 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4672 miimon = 100;
4673 }
4674 }
4675
4676 /* reset values for TLB/ALB */
4677 if ((bond_mode == BOND_MODE_TLB) ||
4678 (bond_mode == BOND_MODE_ALB)) {
4679 if (!miimon) {
4680 printk(KERN_WARNING DRV_NAME
4681 ": Warning: miimon must be specified, "
4682 "otherwise bonding will not detect link "
4683 "failure and link speed which are essential "
4684 "for TLB/ALB load balancing\n");
4685 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4686 miimon = 100;
4687 }
4688 }
4689
4690 if (bond_mode == BOND_MODE_ALB) {
4691 printk(KERN_NOTICE DRV_NAME
4692 ": In ALB mode you might experience client "
4693 "disconnections upon reconnection of a link if the "
4694 "bonding module updelay parameter (%d msec) is "
4695 "incompatible with the forwarding delay time of the "
4696 "switch\n",
4697 updelay);
4698 }
4699
4700 if (!miimon) {
4701 if (updelay || downdelay) {
4702 /* just warn the user the up/down delay will have
4703 * no effect since miimon is zero...
4704 */
4705 printk(KERN_WARNING DRV_NAME
4706 ": Warning: miimon module parameter not set "
4707 "and updelay (%d) or downdelay (%d) module "
4708 "parameter is set; updelay and downdelay have "
4709 "no effect unless miimon is set\n",
4710 updelay, downdelay);
4711 }
4712 } else {
4713 /* don't allow arp monitoring */
4714 if (arp_interval) {
4715 printk(KERN_WARNING DRV_NAME
4716 ": Warning: miimon (%d) and arp_interval (%d) "
4717 "can't be used simultaneously, disabling ARP "
4718 "monitoring\n",
4719 miimon, arp_interval);
4720 arp_interval = 0;
4721 }
4722
4723 if ((updelay % miimon) != 0) {
4724 printk(KERN_WARNING DRV_NAME
4725 ": Warning: updelay (%d) is not a multiple "
4726 "of miimon (%d), updelay rounded to %d ms\n",
4727 updelay, miimon, (updelay / miimon) * miimon);
4728 }
4729
4730 updelay /= miimon;
4731
4732 if ((downdelay % miimon) != 0) {
4733 printk(KERN_WARNING DRV_NAME
4734 ": Warning: downdelay (%d) is not a multiple "
4735 "of miimon (%d), downdelay rounded to %d ms\n",
4736 downdelay, miimon,
4737 (downdelay / miimon) * miimon);
4738 }
4739
4740 downdelay /= miimon;
4741 }
4742
4743 if (arp_interval < 0) {
4744 printk(KERN_WARNING DRV_NAME
4745 ": Warning: arp_interval module parameter (%d) "
4746 ", not in range 0-%d, so it was reset to %d\n",
4747 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4748 arp_interval = BOND_LINK_ARP_INTERV;
4749 }
4750
4751 for (arp_ip_count = 0;
4752 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4753 arp_ip_count++) {
4754 /* not complete check, but should be good enough to
4755 catch mistakes */
4756 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4757 printk(KERN_WARNING DRV_NAME
4758 ": Warning: bad arp_ip_target module parameter "
4759 "(%s), ARP monitoring will not be performed\n",
4760 arp_ip_target[arp_ip_count]);
4761 arp_interval = 0;
4762 } else {
d3bb52b0 4763 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4764 arp_target[arp_ip_count] = ip;
4765 }
4766 }
4767
4768 if (arp_interval && !arp_ip_count) {
4769 /* don't allow arping if no arp_ip_target given... */
4770 printk(KERN_WARNING DRV_NAME
4771 ": Warning: arp_interval module parameter (%d) "
4772 "specified without providing an arp_ip_target "
4773 "parameter, arp_interval was reset to 0\n",
4774 arp_interval);
4775 arp_interval = 0;
4776 }
4777
f5b2b966
JV		 4778 if (arp_validate) {
4779 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4780 printk(KERN_ERR DRV_NAME
4781 ": arp_validate only supported in active-backup mode\n");
4782 return -EINVAL;
4783 }
4784 if (!arp_interval) {
4785 printk(KERN_ERR DRV_NAME
4786 ": arp_validate requires arp_interval\n");
4787 return -EINVAL;
4788 }
4789
4790 arp_validate_value = bond_parse_parm(arp_validate,
4791 arp_validate_tbl);
4792 if (arp_validate_value == -1) {
4793 printk(KERN_ERR DRV_NAME
4794 ": Error: invalid arp_validate \"%s\"\n",
4795 arp_validate == NULL ? "NULL" : arp_validate);
4796 return -EINVAL;
4797 }
4798 } else
4799 arp_validate_value = 0;
4800
1da177e4
LT		 4801 if (miimon) {
4802 printk(KERN_INFO DRV_NAME
4803 ": MII link monitoring set to %d ms\n",
4804 miimon);
4805 } else if (arp_interval) {
4806 int i;
4807
4808 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4809 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4810 arp_interval,
4811 arp_validate_tbl[arp_validate_value].modename,
4812 arp_ip_count);
1da177e4
LT		 4813
4814 for (i = 0; i < arp_ip_count; i++)
4815 printk (" %s", arp_ip_target[i]);
4816
4817 printk("\n");
4818
4819 } else {
4820 /* miimon and arp_interval not set, we need one so things
4821 * work as expected, see bonding.txt for details
4822 */
4823 printk(KERN_WARNING DRV_NAME
4824 ": Warning: either miimon or arp_interval and "
4825 "arp_ip_target module parameters must be specified, "
4826 "otherwise bonding will not detect link failures! see "
4827 "bonding.txt for details.\n");
4828 }
4829
4830 if (primary && !USES_PRIMARY(bond_mode)) {
4831 /* currently, using a primary only makes sense
4832 * in active backup, TLB or ALB modes
4833 */
4834 printk(KERN_WARNING DRV_NAME
4835 ": Warning: %s primary device specified but has no "
4836 "effect in %s mode\n",
4837 primary, bond_mode_name(bond_mode));
4838 primary = NULL;
4839 }
4840
dd957c57
JV		 4841 if (fail_over_mac && (bond_mode != BOND_MODE_ACTIVEBACKUP))
4842 printk(KERN_WARNING DRV_NAME
4843 ": Warning: fail_over_mac only affects "
4844 "active-backup mode.\n");
4845
1da177e4
LT		 4846 /* fill params struct with the proper values */
4847 params->mode = bond_mode;
169a3e66 4848 params->xmit_policy = xmit_hashtype;
1da177e4
LT		 4849 params->miimon = miimon;
4850 params->arp_interval = arp_interval;
f5b2b966 4851 params->arp_validate = arp_validate_value;
1da177e4
LT		 4852 params->updelay = updelay;
4853 params->downdelay = downdelay;
4854 params->use_carrier = use_carrier;
4855 params->lacp_fast = lacp_fast;
4856 params->primary[0] = 0;
dd957c57 4857 params->fail_over_mac = fail_over_mac;
1da177e4
LT		 4858
4859 if (primary) {
4860 strncpy(params->primary, primary, IFNAMSIZ);
4861 params->primary[IFNAMSIZ - 1] = 0;
4862 }
4863
4864 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4865
4866 return 0;
4867}
4868
0daa2303
PZ		 4869static struct lock_class_key bonding_netdev_xmit_lock_key;
4870
dfe60397 4871/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 4872 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 4873 * Caller must NOT hold rtnl_lock; we need to release it here before we
4874 * set up our sysfs entries.
4875 */
4876int bond_create(char *name, struct bond_params *params, struct bonding **newbond)
4877{
4878 struct net_device *bond_dev;
027ea041 4879 struct bonding *bond, *nxt;
dfe60397
MW		 4880 int res;
4881
4882 rtnl_lock();
027ea041
JV		 4883 down_write(&bonding_rwsem);
4884
4885 /* Check to see if the bond already exists. */
4886 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list)
4887 if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
4888 printk(KERN_ERR DRV_NAME
4889 ": cannot add bond %s; it already exists\n",
4890 name);
4891 res = -EPERM;
4892 goto out_rtnl;
4893 }
4894
e4b91c48
JV		 4895 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
4896 ether_setup);
dfe60397
MW		 4897 if (!bond_dev) {
4898 printk(KERN_ERR DRV_NAME
4899 ": %s: eek! can't alloc netdev!\n",
4900 name);
4901 res = -ENOMEM;
4902 goto out_rtnl;
4903 }
4904
e4b91c48
JV		 4905 if (!name) {
4906 res = dev_alloc_name(bond_dev, "bond%d");
4907 if (res < 0)
4908 goto out_netdev;
4909 }
4910
dfe60397
MW		 4911 /* bond_init() must be called after dev_alloc_name() (for the
4912 * /proc files), but before register_netdevice(), because we
4913 * need to set function pointers.
4914 */
4915
4916 res = bond_init(bond_dev, params);
4917 if (res < 0) {
4918 goto out_netdev;
4919 }
4920
dfe60397
MW		 4921 res = register_netdevice(bond_dev);
4922 if (res < 0) {
4923 goto out_bond;
4924 }
0daa2303
PZ		 4925
4926 lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key);
4927
dfe60397
MW		 4928 if (newbond)
4929 *newbond = bond_dev->priv;
4930
ff59c456
JV		 4931 netif_carrier_off(bond_dev);
4932
027ea041 4933 up_write(&bonding_rwsem);
dfe60397 4934 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 4935 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 4936 if (res < 0) {
4937 rtnl_lock();
027ea041 4938 down_write(&bonding_rwsem);
09c89279
JV		 4939 goto out_bond;
4940 }
4941
4942 return 0;
4943
dfe60397
MW		 4944out_bond:
4945 bond_deinit(bond_dev);
4946out_netdev:
4947 free_netdev(bond_dev);
4948out_rtnl:
027ea041 4949 up_write(&bonding_rwsem);
dfe60397 4950 rtnl_unlock();
dfe60397
MW		 4951 return res;
4952}
4953
1da177e4
LT		 4954static int __init bonding_init(void)
4955{
1da177e4
LT		 4956 int i;
4957 int res;
1b76b316 4958 struct bonding *bond, *nxt;
1da177e4
LT		 4959
4960 printk(KERN_INFO "%s", version);
4961
dfe60397 4962 res = bond_check_params(&bonding_defaults);
1da177e4 4963 if (res) {
dfe60397 4964 goto out;
1da177e4
LT		 4965 }
4966
1da177e4
LT		 4967#ifdef CONFIG_PROC_FS
4968 bond_create_proc_dir();
4969#endif
027ea041
JV		 4970
4971 init_rwsem(&bonding_rwsem);
4972
1da177e4 4973 for (i = 0; i < max_bonds; i++) {
e4b91c48 4974 res = bond_create(NULL, &bonding_defaults, NULL);
dfe60397
MW		 4975 if (res)
4976 goto err;
1da177e4
LT		 4977 }
4978
b76cdba9
MW		 4979 res = bond_create_sysfs();
4980 if (res)
4981 goto err;
4982
1da177e4 4983 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 4984 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 4985
dfe60397
MW		 4986 goto out;
4987err:
1b76b316
JV		 4988 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4989 bond_work_cancel_all(bond);
4990 destroy_workqueue(bond->wq);
4991 }
4992
40abc270 4993 rtnl_lock();
1da177e4 4994 bond_free_all();
b76cdba9 4995 bond_destroy_sysfs();
1da177e4 4996 rtnl_unlock();
dfe60397 4997out:
1da177e4 4998 return res;
dfe60397 4999
1da177e4
LT		 5000}
5001
5002static void __exit bonding_exit(void)
5003{
5004 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5005 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4
LT		 5006
5007 rtnl_lock();
5008 bond_free_all();
b76cdba9 5009 bond_destroy_sysfs();
1da177e4
LT		 5010 rtnl_unlock();
5011}
5012
5013module_init(bonding_init);
5014module_exit(bonding_exit);
5015MODULE_LICENSE("GPL");
5016MODULE_VERSION(DRV_VERSION);
5017MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5018MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5019MODULE_SUPPORTED_DEVICE("most ethernet devices");
5020
5021/*
5022 * Local variables:
5023 * c-indent-level: 8
5024 * c-basic-offset: 8
5025 * tab-width: 8
5026 * End:
5027 */
5028
Clone of davem's net-next-2.6 tree