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amd8111e: Fix rx return code
[net-next-2.6.git] / drivers / net / bonding / bond_main.c
CommitLineData
1da177e4
LT		 1/*
2 * originally based on the dummy device.
3 *
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
6 *
7 * bonding.c: an Ethernet Bonding driver
8 *
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
10 * Cisco 5500
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
13 * Linux Bonding
14 * and probably many L2 switches ...
15 *
16 * How it works:
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
22 *
23 * ifconfig bond0 down
24 * will release all slaves, marking them as down.
25 *
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
31 *
1da177e4
LT		 32 */
33
34//#define BONDING_DEBUG 1
35
1da177e4
LT		 36#include <linux/kernel.h>
37#include <linux/module.h>
1da177e4
LT		 38#include <linux/types.h>
39#include <linux/fcntl.h>
40#include <linux/interrupt.h>
41#include <linux/ptrace.h>
42#include <linux/ioport.h>
43#include <linux/in.h>
169a3e66 44#include <net/ip.h>
1da177e4 45#include <linux/ip.h>
169a3e66
JV		 46#include <linux/tcp.h>
47#include <linux/udp.h>
1da177e4
LT		 48#include <linux/slab.h>
49#include <linux/string.h>
50#include <linux/init.h>
51#include <linux/timer.h>
52#include <linux/socket.h>
53#include <linux/ctype.h>
54#include <linux/inet.h>
55#include <linux/bitops.h>
56#include <asm/system.h>
57#include <asm/io.h>
58#include <asm/dma.h>
59#include <asm/uaccess.h>
60#include <linux/errno.h>
61#include <linux/netdevice.h>
62#include <linux/inetdevice.h>
a816c7c7 63#include <linux/igmp.h>
1da177e4
LT		 64#include <linux/etherdevice.h>
65#include <linux/skbuff.h>
66#include <net/sock.h>
67#include <linux/rtnetlink.h>
68#include <linux/proc_fs.h>
69#include <linux/seq_file.h>
70#include <linux/smp.h>
71#include <linux/if_ether.h>
72#include <net/arp.h>
73#include <linux/mii.h>
74#include <linux/ethtool.h>
75#include <linux/if_vlan.h>
76#include <linux/if_bonding.h>
b63bb739 77#include <linux/jiffies.h>
c3ade5ca 78#include <net/route.h>
457c4cbc 79#include <net/net_namespace.h>
1da177e4
LT		 80#include "bonding.h"
81#include "bond_3ad.h"
82#include "bond_alb.h"
83
84/*---------------------------- Module parameters ----------------------------*/
85
86/* monitor all links that often (in milliseconds). <=0 disables monitoring */
87#define BOND_LINK_MON_INTERV 0
88#define BOND_LINK_ARP_INTERV 0
89
90static int max_bonds = BOND_DEFAULT_MAX_BONDS;
7893b249 91static int num_grat_arp = 1;
1da177e4
LT		 92static int miimon = BOND_LINK_MON_INTERV;
93static int updelay = 0;
94static int downdelay = 0;
95static int use_carrier = 1;
96static char *mode = NULL;
97static char *primary = NULL;
98static char *lacp_rate = NULL;
169a3e66 99static char *xmit_hash_policy = NULL;
1da177e4
LT		 100static int arp_interval = BOND_LINK_ARP_INTERV;
101static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, };
f5b2b966 102static char *arp_validate = NULL;
3915c1e8 103static char *fail_over_mac = NULL;
12479f9a 104struct bond_params bonding_defaults;
1da177e4
LT		 105
106module_param(max_bonds, int, 0);
107MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
7893b249
MS		 108module_param(num_grat_arp, int, 0644);
109MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
1da177e4
LT		 110module_param(miimon, int, 0);
111MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
112module_param(updelay, int, 0);
113MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
114module_param(downdelay, int, 0);
2ac47660
MW		 115MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
116 "in milliseconds");
1da177e4 117module_param(use_carrier, int, 0);
2ac47660
MW		 118MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
119 "0 for off, 1 for on (default)");
1da177e4 120module_param(mode, charp, 0);
2ac47660
MW		 121MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
122 "1 for active-backup, 2 for balance-xor, "
123 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
124 "6 for balance-alb");
1da177e4
LT		 125module_param(primary, charp, 0);
126MODULE_PARM_DESC(primary, "Primary network device to use");
127module_param(lacp_rate, charp, 0);
2ac47660
MW		 128MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
129 "(slow/fast)");
169a3e66 130module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 131MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
132 ", 1 for layer 3+4");
1da177e4
LT		 133module_param(arp_interval, int, 0);
134MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
135module_param_array(arp_ip_target, charp, NULL, 0);
136MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV		 137module_param(arp_validate, charp, 0);
138MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
3915c1e8
JV		 139module_param(fail_over_mac, charp, 0);
140MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
1da177e4
LT		 141
142/*----------------------------- Global variables ----------------------------*/
143
f71e1309 144static const char * const version =
1da177e4
LT		 145 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
146
12479f9a 147LIST_HEAD(bond_dev_list);
1da177e4
LT		 148
149#ifdef CONFIG_PROC_FS
150static struct proc_dir_entry *bond_proc_dir = NULL;
151#endif
152
b76cdba9 153extern struct rw_semaphore bonding_rwsem;
d3bb52b0 154static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
1da177e4 155static int arp_ip_count = 0;
1da177e4 156static int bond_mode = BOND_MODE_ROUNDROBIN;
169a3e66 157static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
1da177e4 158static int lacp_fast = 0;
217df670 159
1da177e4 160
12479f9a 161struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 162{ "slow", AD_LACP_SLOW},
163{ "fast", AD_LACP_FAST},
164{ NULL, -1},
165};
166
12479f9a 167struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 168{ "balance-rr", BOND_MODE_ROUNDROBIN},
169{ "active-backup", BOND_MODE_ACTIVEBACKUP},
170{ "balance-xor", BOND_MODE_XOR},
171{ "broadcast", BOND_MODE_BROADCAST},
172{ "802.3ad", BOND_MODE_8023AD},
173{ "balance-tlb", BOND_MODE_TLB},
174{ "balance-alb", BOND_MODE_ALB},
175{ NULL, -1},
176};
177
12479f9a 178struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 179{ "layer2", BOND_XMIT_POLICY_LAYER2},
180{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
6f6652be 181{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
169a3e66
JV		 182{ NULL, -1},
183};
184
f5b2b966
JV		 185struct bond_parm_tbl arp_validate_tbl[] = {
186{ "none", BOND_ARP_VALIDATE_NONE},
187{ "active", BOND_ARP_VALIDATE_ACTIVE},
188{ "backup", BOND_ARP_VALIDATE_BACKUP},
189{ "all", BOND_ARP_VALIDATE_ALL},
190{ NULL, -1},
191};
192
3915c1e8
JV		 193struct bond_parm_tbl fail_over_mac_tbl[] = {
194{ "none", BOND_FOM_NONE},
195{ "active", BOND_FOM_ACTIVE},
196{ "follow", BOND_FOM_FOLLOW},
197{ NULL, -1},
198};
199
1da177e4
LT		 200/*-------------------------- Forward declarations ---------------------------*/
201
c3ade5ca 202static void bond_send_gratuitous_arp(struct bonding *bond);
c50b85d0 203static void bond_deinit(struct net_device *bond_dev);
1da177e4
LT		 204
205/*---------------------------- General routines -----------------------------*/
206
4ad072c9 207static const char *bond_mode_name(int mode)
1da177e4
LT		 208{
209 switch (mode) {
210 case BOND_MODE_ROUNDROBIN :
211 return "load balancing (round-robin)";
212 case BOND_MODE_ACTIVEBACKUP :
213 return "fault-tolerance (active-backup)";
214 case BOND_MODE_XOR :
215 return "load balancing (xor)";
216 case BOND_MODE_BROADCAST :
217 return "fault-tolerance (broadcast)";
218 case BOND_MODE_8023AD:
219 return "IEEE 802.3ad Dynamic link aggregation";
220 case BOND_MODE_TLB:
221 return "transmit load balancing";
222 case BOND_MODE_ALB:
223 return "adaptive load balancing";
224 default:
225 return "unknown";
226 }
227}
228
229/*---------------------------------- VLAN -----------------------------------*/
230
231/**
232 * bond_add_vlan - add a new vlan id on bond
233 * @bond: bond that got the notification
234 * @vlan_id: the vlan id to add
235 *
236 * Returns -ENOMEM if allocation failed.
237 */
238static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
239{
240 struct vlan_entry *vlan;
241
242 dprintk("bond: %s, vlan id %d\n",
243 (bond ? bond->dev->name: "None"), vlan_id);
244
245 vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL);
246 if (!vlan) {
247 return -ENOMEM;
248 }
249
250 INIT_LIST_HEAD(&vlan->vlan_list);
251 vlan->vlan_id = vlan_id;
c3ade5ca 252 vlan->vlan_ip = 0;
1da177e4
LT		 253
254 write_lock_bh(&bond->lock);
255
256 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
257
258 write_unlock_bh(&bond->lock);
259
260 dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
261
262 return 0;
263}
264
265/**
266 * bond_del_vlan - delete a vlan id from bond
267 * @bond: bond that got the notification
268 * @vlan_id: the vlan id to delete
269 *
270 * returns -ENODEV if @vlan_id was not found in @bond.
271 */
272static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
273{
0883beca 274 struct vlan_entry *vlan;
1da177e4
LT		 275 int res = -ENODEV;
276
277 dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
278
279 write_lock_bh(&bond->lock);
280
0883beca 281 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
1da177e4
LT		 282 if (vlan->vlan_id == vlan_id) {
283 list_del(&vlan->vlan_list);
284
285 if ((bond->params.mode == BOND_MODE_TLB) ||
286 (bond->params.mode == BOND_MODE_ALB)) {
287 bond_alb_clear_vlan(bond, vlan_id);
288 }
289
290 dprintk("removed VLAN ID %d from bond %s\n", vlan_id,
291 bond->dev->name);
292
293 kfree(vlan);
294
295 if (list_empty(&bond->vlan_list) &&
296 (bond->slave_cnt == 0)) {
297 /* Last VLAN removed and no slaves, so
298 * restore block on adding VLANs. This will
299 * be removed once new slaves that are not
300 * VLAN challenged will be added.
301 */
302 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
303 }
304
305 res = 0;
306 goto out;
307 }
308 }
309
310 dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id,
311 bond->dev->name);
312
313out:
314 write_unlock_bh(&bond->lock);
315 return res;
316}
317
318/**
319 * bond_has_challenged_slaves
320 * @bond: the bond we're working on
321 *
322 * Searches the slave list. Returns 1 if a vlan challenged slave
323 * was found, 0 otherwise.
324 *
325 * Assumes bond->lock is held.
326 */
327static int bond_has_challenged_slaves(struct bonding *bond)
328{
329 struct slave *slave;
330 int i;
331
332 bond_for_each_slave(bond, slave, i) {
333 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
334 dprintk("found VLAN challenged slave - %s\n",
335 slave->dev->name);
336 return 1;
337 }
338 }
339
340 dprintk("no VLAN challenged slaves found\n");
341 return 0;
342}
343
344/**
345 * bond_next_vlan - safely skip to the next item in the vlans list.
346 * @bond: the bond we're working on
347 * @curr: item we're advancing from
348 *
349 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
350 * or @curr->next otherwise (even if it is @curr itself again).
351 *
352 * Caller must hold bond->lock
353 */
354struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
355{
356 struct vlan_entry *next, *last;
357
358 if (list_empty(&bond->vlan_list)) {
359 return NULL;
360 }
361
362 if (!curr) {
363 next = list_entry(bond->vlan_list.next,
364 struct vlan_entry, vlan_list);
365 } else {
366 last = list_entry(bond->vlan_list.prev,
367 struct vlan_entry, vlan_list);
368 if (last == curr) {
369 next = list_entry(bond->vlan_list.next,
370 struct vlan_entry, vlan_list);
371 } else {
372 next = list_entry(curr->vlan_list.next,
373 struct vlan_entry, vlan_list);
374 }
375 }
376
377 return next;
378}
379
380/**
381 * bond_dev_queue_xmit - Prepare skb for xmit.
382 *
383 * @bond: bond device that got this skb for tx.
384 * @skb: hw accel VLAN tagged skb to transmit
385 * @slave_dev: slave that is supposed to xmit this skbuff
386 *
387 * When the bond gets an skb to transmit that is
388 * already hardware accelerated VLAN tagged, and it
389 * needs to relay this skb to a slave that is not
390 * hw accel capable, the skb needs to be "unaccelerated",
391 * i.e. strip the hwaccel tag and re-insert it as part
392 * of the payload.
393 */
394int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
395{
966bc6f4 396 unsigned short uninitialized_var(vlan_id);
1da177e4
LT		 397
398 if (!list_empty(&bond->vlan_list) &&
399 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
400 vlan_get_tag(skb, &vlan_id) == 0) {
401 skb->dev = slave_dev;
402 skb = vlan_put_tag(skb, vlan_id);
403 if (!skb) {
404 /* vlan_put_tag() frees the skb in case of error,
405 * so return success here so the calling functions
406 * won't attempt to free is again.
407 */
408 return 0;
409 }
410 } else {
411 skb->dev = slave_dev;
412 }
413
414 skb->priority = 1;
415 dev_queue_xmit(skb);
416
417 return 0;
418}
419
420/*
421 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
422 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
423 * lock because:
424 * a. This operation is performed in IOCTL context,
425 * b. The operation is protected by the RTNL semaphore in the 8021q code,
426 * c. Holding a lock with BH disabled while directly calling a base driver
427 * entry point is generally a BAD idea.
428 *
429 * The design of synchronization/protection for this operation in the 8021q
430 * module is good for one or more VLAN devices over a single physical device
431 * and cannot be extended for a teaming solution like bonding, so there is a
432 * potential race condition here where a net device from the vlan group might
433 * be referenced (either by a base driver or the 8021q code) while it is being
434 * removed from the system. However, it turns out we're not making matters
435 * worse, and if it works for regular VLAN usage it will work here too.
436*/
437
438/**
439 * bond_vlan_rx_register - Propagates registration to slaves
440 * @bond_dev: bonding net device that got called
441 * @grp: vlan group being registered
442 */
443static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
444{
445 struct bonding *bond = bond_dev->priv;
446 struct slave *slave;
447 int i;
448
449 bond->vlgrp = grp;
450
451 bond_for_each_slave(bond, slave, i) {
452 struct net_device *slave_dev = slave->dev;
453
454 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
455 slave_dev->vlan_rx_register) {
456 slave_dev->vlan_rx_register(slave_dev, grp);
457 }
458 }
459}
460
461/**
462 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
463 * @bond_dev: bonding net device that got called
464 * @vid: vlan id being added
465 */
466static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
467{
468 struct bonding *bond = bond_dev->priv;
469 struct slave *slave;
470 int i, res;
471
472 bond_for_each_slave(bond, slave, i) {
473 struct net_device *slave_dev = slave->dev;
474
475 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
476 slave_dev->vlan_rx_add_vid) {
477 slave_dev->vlan_rx_add_vid(slave_dev, vid);
478 }
479 }
480
481 res = bond_add_vlan(bond, vid);
482 if (res) {
483 printk(KERN_ERR DRV_NAME
4e0952c7 484 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 485 bond_dev->name, vid);
486 }
487}
488
489/**
490 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
491 * @bond_dev: bonding net device that got called
492 * @vid: vlan id being removed
493 */
494static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
495{
496 struct bonding *bond = bond_dev->priv;
497 struct slave *slave;
498 struct net_device *vlan_dev;
499 int i, res;
500
501 bond_for_each_slave(bond, slave, i) {
502 struct net_device *slave_dev = slave->dev;
503
504 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
505 slave_dev->vlan_rx_kill_vid) {
506 /* Save and then restore vlan_dev in the grp array,
507 * since the slave's driver might clear it.
508 */
5c15bdec 509 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
1da177e4 510 slave_dev->vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 511 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT		 512 }
513 }
514
515 res = bond_del_vlan(bond, vid);
516 if (res) {
517 printk(KERN_ERR DRV_NAME
4e0952c7 518 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 519 bond_dev->name, vid);
520 }
521}
522
523static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
524{
525 struct vlan_entry *vlan;
526
527 write_lock_bh(&bond->lock);
528
529 if (list_empty(&bond->vlan_list)) {
530 goto out;
531 }
532
533 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
534 slave_dev->vlan_rx_register) {
535 slave_dev->vlan_rx_register(slave_dev, bond->vlgrp);
536 }
537
538 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
539 !(slave_dev->vlan_rx_add_vid)) {
540 goto out;
541 }
542
543 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
544 slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id);
545 }
546
547out:
548 write_unlock_bh(&bond->lock);
549}
550
551static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
552{
553 struct vlan_entry *vlan;
554 struct net_device *vlan_dev;
555
556 write_lock_bh(&bond->lock);
557
558 if (list_empty(&bond->vlan_list)) {
559 goto out;
560 }
561
562 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
563 !(slave_dev->vlan_rx_kill_vid)) {
564 goto unreg;
565 }
566
567 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
568 /* Save and then restore vlan_dev in the grp array,
569 * since the slave's driver might clear it.
570 */
5c15bdec 571 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
1da177e4 572 slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 573 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT		 574 }
575
576unreg:
577 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
578 slave_dev->vlan_rx_register) {
579 slave_dev->vlan_rx_register(slave_dev, NULL);
580 }
581
582out:
583 write_unlock_bh(&bond->lock);
584}
585
586/*------------------------------- Link status -------------------------------*/
587
ff59c456
JV		 588/*
589 * Set the carrier state for the master according to the state of its
590 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
591 * do special 802.3ad magic.
592 *
593 * Returns zero if carrier state does not change, nonzero if it does.
594 */
595static int bond_set_carrier(struct bonding *bond)
596{
597 struct slave *slave;
598 int i;
599
600 if (bond->slave_cnt == 0)
601 goto down;
602
603 if (bond->params.mode == BOND_MODE_8023AD)
604 return bond_3ad_set_carrier(bond);
605
606 bond_for_each_slave(bond, slave, i) {
607 if (slave->link == BOND_LINK_UP) {
608 if (!netif_carrier_ok(bond->dev)) {
609 netif_carrier_on(bond->dev);
610 return 1;
611 }
612 return 0;
613 }
614 }
615
616down:
617 if (netif_carrier_ok(bond->dev)) {
618 netif_carrier_off(bond->dev);
619 return 1;
620 }
621 return 0;
622}
623
1da177e4
LT		 624/*
625 * Get link speed and duplex from the slave's base driver
626 * using ethtool. If for some reason the call fails or the
627 * values are invalid, fake speed and duplex to 100/Full
628 * and return error.
629 */
630static int bond_update_speed_duplex(struct slave *slave)
631{
632 struct net_device *slave_dev = slave->dev;
1da177e4 633 struct ethtool_cmd etool;
61a44b9c 634 int res;
1da177e4
LT		 635
636 /* Fake speed and duplex */
637 slave->speed = SPEED_100;
638 slave->duplex = DUPLEX_FULL;
639
61a44b9c
MW		 640 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
641 return -1;
1da177e4 642
61a44b9c
MW		 643 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
644 if (res < 0)
1da177e4 645 return -1;
1da177e4 646
1da177e4
LT		 647 switch (etool.speed) {
648 case SPEED_10:
649 case SPEED_100:
650 case SPEED_1000:
94dbffd5 651 case SPEED_10000:
1da177e4
LT		 652 break;
653 default:
654 return -1;
655 }
656
657 switch (etool.duplex) {
658 case DUPLEX_FULL:
659 case DUPLEX_HALF:
660 break;
661 default:
662 return -1;
663 }
664
665 slave->speed = etool.speed;
666 slave->duplex = etool.duplex;
667
668 return 0;
669}
670
671/*
672 * if <dev> supports MII link status reporting, check its link status.
673 *
674 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
675 * depening upon the setting of the use_carrier parameter.
676 *
677 * Return either BMSR_LSTATUS, meaning that the link is up (or we
678 * can't tell and just pretend it is), or 0, meaning that the link is
679 * down.
680 *
681 * If reporting is non-zero, instead of faking link up, return -1 if
682 * both ETHTOOL and MII ioctls fail (meaning the device does not
683 * support them). If use_carrier is set, return whatever it says.
684 * It'd be nice if there was a good way to tell if a driver supports
685 * netif_carrier, but there really isn't.
686 */
687static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
688{
689 static int (* ioctl)(struct net_device *, struct ifreq *, int);
690 struct ifreq ifr;
691 struct mii_ioctl_data *mii;
1da177e4
LT		 692
693 if (bond->params.use_carrier) {
694 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
695 }
696
697 ioctl = slave_dev->do_ioctl;
698 if (ioctl) {
699 /* TODO: set pointer to correct ioctl on a per team member */
700 /* bases to make this more efficient. that is, once */
701 /* we determine the correct ioctl, we will always */
702 /* call it and not the others for that team */
703 /* member. */
704
705 /*
706 * We cannot assume that SIOCGMIIPHY will also read a
707 * register; not all network drivers (e.g., e100)
708 * support that.
709 */
710
711 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
712 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
713 mii = if_mii(&ifr);
714 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
715 mii->reg_num = MII_BMSR;
716 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
717 return (mii->val_out & BMSR_LSTATUS);
718 }
719 }
720 }
721
61a44b9c
MW		 722 /*
723 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
724 * attempt to get link status from it if the above MII ioctls fail.
725 */
1da177e4
LT		 726 if (slave_dev->ethtool_ops) {
727 if (slave_dev->ethtool_ops->get_link) {
728 u32 link;
729
730 link = slave_dev->ethtool_ops->get_link(slave_dev);
731
732 return link ? BMSR_LSTATUS : 0;
733 }
734 }
735
1da177e4
LT		 736 /*
737 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 738 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT		 739 * cannot report link status). If not reporting, pretend
740 * we're ok.
741 */
742 return (reporting ? -1 : BMSR_LSTATUS);
743}
744
745/*----------------------------- Multicast list ------------------------------*/
746
747/*
748 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
749 */
750static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
751{
752 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
753 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
754}
755
756/*
757 * returns dmi entry if found, NULL otherwise
758 */
759static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
760{
761 struct dev_mc_list *idmi;
762
763 for (idmi = mc_list; idmi; idmi = idmi->next) {
764 if (bond_is_dmi_same(dmi, idmi)) {
765 return idmi;
766 }
767 }
768
769 return NULL;
770}
771
772/*
773 * Push the promiscuity flag down to appropriate slaves
774 */
7e1a1ac1 775static int bond_set_promiscuity(struct bonding *bond, int inc)
1da177e4 776{
7e1a1ac1 777 int err = 0;
1da177e4
LT		 778 if (USES_PRIMARY(bond->params.mode)) {
779 /* write lock already acquired */
780 if (bond->curr_active_slave) {
7e1a1ac1
WC		 781 err = dev_set_promiscuity(bond->curr_active_slave->dev,
782 inc);
1da177e4
LT		 783 }
784 } else {
785 struct slave *slave;
786 int i;
787 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 788 err = dev_set_promiscuity(slave->dev, inc);
789 if (err)
790 return err;
1da177e4
LT		 791 }
792 }
7e1a1ac1 793 return err;
1da177e4
LT		 794}
795
796/*
797 * Push the allmulti flag down to all slaves
798 */
7e1a1ac1 799static int bond_set_allmulti(struct bonding *bond, int inc)
1da177e4 800{
7e1a1ac1 801 int err = 0;
1da177e4
LT		 802 if (USES_PRIMARY(bond->params.mode)) {
803 /* write lock already acquired */
804 if (bond->curr_active_slave) {
7e1a1ac1
WC		 805 err = dev_set_allmulti(bond->curr_active_slave->dev,
806 inc);
1da177e4
LT		 807 }
808 } else {
809 struct slave *slave;
810 int i;
811 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 812 err = dev_set_allmulti(slave->dev, inc);
813 if (err)
814 return err;
1da177e4
LT		 815 }
816 }
7e1a1ac1 817 return err;
1da177e4
LT		 818}
819
820/*
821 * Add a Multicast address to slaves
822 * according to mode
823 */
824static void bond_mc_add(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_add(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_add(slave->dev, addr, alen, 0);
836 }
837 }
838}
839
840/*
841 * Remove a multicast address from slave
842 * according to mode
843 */
844static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
845{
846 if (USES_PRIMARY(bond->params.mode)) {
847 /* write lock already acquired */
848 if (bond->curr_active_slave) {
849 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
850 }
851 } else {
852 struct slave *slave;
853 int i;
854 bond_for_each_slave(bond, slave, i) {
855 dev_mc_delete(slave->dev, addr, alen, 0);
856 }
857 }
858}
859
a816c7c7
JV		 860
861/*
862 * Retrieve the list of registered multicast addresses for the bonding
863 * device and retransmit an IGMP JOIN request to the current active
864 * slave.
865 */
866static void bond_resend_igmp_join_requests(struct bonding *bond)
867{
868 struct in_device *in_dev;
869 struct ip_mc_list *im;
870
871 rcu_read_lock();
872 in_dev = __in_dev_get_rcu(bond->dev);
873 if (in_dev) {
874 for (im = in_dev->mc_list; im; im = im->next) {
875 ip_mc_rejoin_group(im);
876 }
877 }
878
879 rcu_read_unlock();
880}
881
1da177e4
LT		 882/*
883 * Totally destroys the mc_list in bond
884 */
885static void bond_mc_list_destroy(struct bonding *bond)
886{
887 struct dev_mc_list *dmi;
888
889 dmi = bond->mc_list;
890 while (dmi) {
891 bond->mc_list = dmi->next;
892 kfree(dmi);
893 dmi = bond->mc_list;
894 }
a816c7c7 895 bond->mc_list = NULL;
1da177e4
LT		 896}
897
898/*
899 * Copy all the Multicast addresses from src to the bonding device dst
900 */
de54f390 901static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 902 gfp_t gfp_flag)
1da177e4
LT		 903{
904 struct dev_mc_list *dmi, *new_dmi;
905
906 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 907 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT		 908
909 if (!new_dmi) {
910 /* FIXME: Potential memory leak !!! */
911 return -ENOMEM;
912 }
913
914 new_dmi->next = bond->mc_list;
915 bond->mc_list = new_dmi;
916 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
917 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
918 new_dmi->dmi_users = dmi->dmi_users;
919 new_dmi->dmi_gusers = dmi->dmi_gusers;
920 }
921
922 return 0;
923}
924
925/*
926 * flush all members of flush->mc_list from device dev->mc_list
927 */
928static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
929{
930 struct bonding *bond = bond_dev->priv;
931 struct dev_mc_list *dmi;
932
933 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
934 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
935 }
936
937 if (bond->params.mode == BOND_MODE_8023AD) {
938 /* del lacpdu mc addr from mc list */
939 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
940
941 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
942 }
943}
944
945/*--------------------------- Active slave change ---------------------------*/
946
947/*
948 * Update the mc list and multicast-related flags for the new and
949 * old active slaves (if any) according to the multicast mode, and
950 * promiscuous flags unconditionally.
951 */
952static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
953{
954 struct dev_mc_list *dmi;
955
956 if (!USES_PRIMARY(bond->params.mode)) {
957 /* nothing to do - mc list is already up-to-date on
958 * all slaves
959 */
960 return;
961 }
962
963 if (old_active) {
964 if (bond->dev->flags & IFF_PROMISC) {
965 dev_set_promiscuity(old_active->dev, -1);
966 }
967
968 if (bond->dev->flags & IFF_ALLMULTI) {
969 dev_set_allmulti(old_active->dev, -1);
970 }
971
972 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
973 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
974 }
975 }
976
977 if (new_active) {
7e1a1ac1 978 /* FIXME: Signal errors upstream. */
1da177e4
LT		 979 if (bond->dev->flags & IFF_PROMISC) {
980 dev_set_promiscuity(new_active->dev, 1);
981 }
982
983 if (bond->dev->flags & IFF_ALLMULTI) {
984 dev_set_allmulti(new_active->dev, 1);
985 }
986
987 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
988 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
989 }
a816c7c7 990 bond_resend_igmp_join_requests(bond);
1da177e4
LT		 991 }
992}
993
3915c1e8
JV		 994/*
995 * bond_do_fail_over_mac
996 *
997 * Perform special MAC address swapping for fail_over_mac settings
998 *
999 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
1000 */
1001static void bond_do_fail_over_mac(struct bonding *bond,
1002 struct slave *new_active,
1003 struct slave *old_active)
1004{
1005 u8 tmp_mac[ETH_ALEN];
1006 struct sockaddr saddr;
1007 int rv;
1008
1009 switch (bond->params.fail_over_mac) {
1010 case BOND_FOM_ACTIVE:
1011 if (new_active)
1012 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1013 new_active->dev->addr_len);
1014 break;
1015 case BOND_FOM_FOLLOW:
1016 /*
1017 * if new_active && old_active, swap them
1018 * if just old_active, do nothing (going to no active slave)
1019 * if just new_active, set new_active to bond's MAC
1020 */
1021 if (!new_active)
1022 return;
1023
1024 write_unlock_bh(&bond->curr_slave_lock);
1025 read_unlock(&bond->lock);
1026
1027 if (old_active) {
1028 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1029 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1030 ETH_ALEN);
1031 saddr.sa_family = new_active->dev->type;
1032 } else {
1033 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1034 saddr.sa_family = bond->dev->type;
1035 }
1036
1037 rv = dev_set_mac_address(new_active->dev, &saddr);
1038 if (rv) {
1039 printk(KERN_ERR DRV_NAME
1040 ": %s: Error %d setting MAC of slave %s\n",
1041 bond->dev->name, -rv, new_active->dev->name);
1042 goto out;
1043 }
1044
1045 if (!old_active)
1046 goto out;
1047
1048 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1049 saddr.sa_family = old_active->dev->type;
1050
1051 rv = dev_set_mac_address(old_active->dev, &saddr);
1052 if (rv)
1053 printk(KERN_ERR DRV_NAME
1054 ": %s: Error %d setting MAC of slave %s\n",
1055 bond->dev->name, -rv, new_active->dev->name);
1056out:
1057 read_lock(&bond->lock);
1058 write_lock_bh(&bond->curr_slave_lock);
1059 break;
1060 default:
1061 printk(KERN_ERR DRV_NAME
1062 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1063 bond->dev->name, bond->params.fail_over_mac);
1064 break;
1065 }
1066
1067}
1068
1069
1da177e4
LT		 1070/**
1071 * find_best_interface - select the best available slave to be the active one
1072 * @bond: our bonding struct
1073 *
1074 * Warning: Caller must hold curr_slave_lock for writing.
1075 */
1076static struct slave *bond_find_best_slave(struct bonding *bond)
1077{
1078 struct slave *new_active, *old_active;
1079 struct slave *bestslave = NULL;
1080 int mintime = bond->params.updelay;
1081 int i;
1082
1083 new_active = old_active = bond->curr_active_slave;
1084
1085 if (!new_active) { /* there were no active slaves left */
1086 if (bond->slave_cnt > 0) { /* found one slave */
1087 new_active = bond->first_slave;
1088 } else {
1089 return NULL; /* still no slave, return NULL */
1090 }
1091 }
1092
1093 /* first try the primary link; if arping, a link must tx/rx traffic
1094 * before it can be considered the curr_active_slave - also, we would skip
1095 * slaves between the curr_active_slave and primary_slave that may be up
1096 * and able to arp
1097 */
1098 if ((bond->primary_slave) &&
1099 (!bond->params.arp_interval) &&
1100 (IS_UP(bond->primary_slave->dev))) {
1101 new_active = bond->primary_slave;
1102 }
1103
1104 /* remember where to stop iterating over the slaves */
1105 old_active = new_active;
1106
1107 bond_for_each_slave_from(bond, new_active, i, old_active) {
1108 if (IS_UP(new_active->dev)) {
1109 if (new_active->link == BOND_LINK_UP) {
1110 return new_active;
1111 } else if (new_active->link == BOND_LINK_BACK) {
1112 /* link up, but waiting for stabilization */
1113 if (new_active->delay < mintime) {
1114 mintime = new_active->delay;
1115 bestslave = new_active;
1116 }
1117 }
1118 }
1119 }
1120
1121 return bestslave;
1122}
1123
1124/**
1125 * change_active_interface - change the active slave into the specified one
1126 * @bond: our bonding struct
1127 * @new: the new slave to make the active one
1128 *
1129 * Set the new slave to the bond's settings and unset them on the old
1130 * curr_active_slave.
1131 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1132 *
1133 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1134 * because it is apparently the best available slave we have, even though its
1135 * updelay hasn't timed out yet.
1136 *
3915c1e8
JV		 1137 * If new_active is not NULL, caller must hold bond->lock for read and
1138 * curr_slave_lock for write_bh.
1da177e4 1139 */
a77b5325 1140void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1141{
1142 struct slave *old_active = bond->curr_active_slave;
1143
1144 if (old_active == new_active) {
1145 return;
1146 }
1147
1148 if (new_active) {
b2220cad
JV		 1149 new_active->jiffies = jiffies;
1150
1da177e4
LT		 1151 if (new_active->link == BOND_LINK_BACK) {
1152 if (USES_PRIMARY(bond->params.mode)) {
1153 printk(KERN_INFO DRV_NAME
1154 ": %s: making interface %s the new "
1155 "active one %d ms earlier.\n",
1156 bond->dev->name, new_active->dev->name,
1157 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1158 }
1159
1160 new_active->delay = 0;
1161 new_active->link = BOND_LINK_UP;
1da177e4
LT		 1162
1163 if (bond->params.mode == BOND_MODE_8023AD) {
1164 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1165 }
1166
1167 if ((bond->params.mode == BOND_MODE_TLB) ||
1168 (bond->params.mode == BOND_MODE_ALB)) {
1169 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1170 }
1171 } else {
1172 if (USES_PRIMARY(bond->params.mode)) {
1173 printk(KERN_INFO DRV_NAME
1174 ": %s: making interface %s the new "
1175 "active one.\n",
1176 bond->dev->name, new_active->dev->name);
1177 }
1178 }
1179 }
1180
1da177e4
LT		 1181 if (USES_PRIMARY(bond->params.mode)) {
1182 bond_mc_swap(bond, new_active, old_active);
1183 }
1184
1185 if ((bond->params.mode == BOND_MODE_TLB) ||
1186 (bond->params.mode == BOND_MODE_ALB)) {
1187 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1188 if (old_active)
1189 bond_set_slave_inactive_flags(old_active);
1190 if (new_active)
1191 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1192 } else {
1193 bond->curr_active_slave = new_active;
1194 }
c3ade5ca
JV		 1195
1196 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1197 if (old_active) {
1198 bond_set_slave_inactive_flags(old_active);
1199 }
1200
1201 if (new_active) {
1202 bond_set_slave_active_flags(new_active);
2ab82852 1203
709f8a45
OG		 1204 if (bond->params.fail_over_mac)
1205 bond_do_fail_over_mac(bond, new_active,
1206 old_active);
3915c1e8 1207
709f8a45 1208 bond->send_grat_arp = bond->params.num_grat_arp;
b59f9f74 1209 bond_send_gratuitous_arp(bond);
01f3109d
OG		 1210
1211 write_unlock_bh(&bond->curr_slave_lock);
1212 read_unlock(&bond->lock);
1213
1214 netdev_bonding_change(bond->dev);
1215
1216 read_lock(&bond->lock);
1217 write_lock_bh(&bond->curr_slave_lock);
7893b249 1218 }
c3ade5ca 1219 }
1da177e4
LT		 1220}
1221
1222/**
1223 * bond_select_active_slave - select a new active slave, if needed
1224 * @bond: our bonding struct
1225 *
1226 * This functions shoud be called when one of the following occurs:
1227 * - The old curr_active_slave has been released or lost its link.
1228 * - The primary_slave has got its link back.
1229 * - A slave has got its link back and there's no old curr_active_slave.
1230 *
3915c1e8 1231 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1da177e4 1232 */
a77b5325 1233void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1234{
1235 struct slave *best_slave;
ff59c456 1236 int rv;
1da177e4
LT		 1237
1238 best_slave = bond_find_best_slave(bond);
1239 if (best_slave != bond->curr_active_slave) {
1240 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1241 rv = bond_set_carrier(bond);
1242 if (!rv)
1243 return;
1244
1245 if (netif_carrier_ok(bond->dev)) {
1246 printk(KERN_INFO DRV_NAME
1247 ": %s: first active interface up!\n",
1248 bond->dev->name);
1249 } else {
1250 printk(KERN_INFO DRV_NAME ": %s: "
1251 "now running without any active interface !\n",
1252 bond->dev->name);
1253 }
1da177e4
LT		 1254 }
1255}
1256
1257/*--------------------------- slave list handling ---------------------------*/
1258
1259/*
1260 * This function attaches the slave to the end of list.
1261 *
1262 * bond->lock held for writing by caller.
1263 */
1264static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1265{
1266 if (bond->first_slave == NULL) { /* attaching the first slave */
1267 new_slave->next = new_slave;
1268 new_slave->prev = new_slave;
1269 bond->first_slave = new_slave;
1270 } else {
1271 new_slave->next = bond->first_slave;
1272 new_slave->prev = bond->first_slave->prev;
1273 new_slave->next->prev = new_slave;
1274 new_slave->prev->next = new_slave;
1275 }
1276
1277 bond->slave_cnt++;
1278}
1279
1280/*
1281 * This function detaches the slave from the list.
1282 * WARNING: no check is made to verify if the slave effectively
1283 * belongs to <bond>.
1284 * Nothing is freed on return, structures are just unchained.
1285 * If any slave pointer in bond was pointing to <slave>,
1286 * it should be changed by the calling function.
1287 *
1288 * bond->lock held for writing by caller.
1289 */
1290static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1291{
1292 if (slave->next) {
1293 slave->next->prev = slave->prev;
1294 }
1295
1296 if (slave->prev) {
1297 slave->prev->next = slave->next;
1298 }
1299
1300 if (bond->first_slave == slave) { /* slave is the first slave */
1301 if (bond->slave_cnt > 1) { /* there are more slave */
1302 bond->first_slave = slave->next;
1303 } else {
1304 bond->first_slave = NULL; /* slave was the last one */
1305 }
1306 }
1307
1308 slave->next = NULL;
1309 slave->prev = NULL;
1310 bond->slave_cnt--;
1311}
1312
1313/*---------------------------------- IOCTL ----------------------------------*/
1314
4ad072c9
AB		 1315static int bond_sethwaddr(struct net_device *bond_dev,
1316 struct net_device *slave_dev)
1da177e4
LT		 1317{
1318 dprintk("bond_dev=%p\n", bond_dev);
1319 dprintk("slave_dev=%p\n", slave_dev);
1320 dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1321 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1322 return 0;
1323}
1324
7f353bf2
HX		 1325#define BOND_VLAN_FEATURES \
1326 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1327 NETIF_F_HW_VLAN_FILTER)
8531c5ff
AK		 1328
1329/*
8e3babcd 1330 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX		 1331 * feature bits are managed elsewhere, so preserve those feature bits
1332 * on the master device.
8531c5ff
AK		 1333 */
1334static int bond_compute_features(struct bonding *bond)
1335{
8531c5ff
AK		 1336 struct slave *slave;
1337 struct net_device *bond_dev = bond->dev;
7f353bf2 1338 unsigned long features = bond_dev->features;
3158bf7d
MS		 1339 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1340 bond_dev->hard_header_len);
8e3babcd 1341 int i;
8531c5ff 1342
7f353bf2 1343 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
b63365a2
HX		 1344 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1345
1346 if (!bond->first_slave)
1347 goto done;
1348
1349 features &= ~NETIF_F_ONE_FOR_ALL;
7f353bf2 1350
54ef3137 1351 bond_for_each_slave(bond, slave, i) {
b63365a2
HX		 1352 features = netdev_increment_features(features,
1353 slave->dev->features,
1354 NETIF_F_ONE_FOR_ALL);
54ef3137
JV		 1355 if (slave->dev->hard_header_len > max_hard_header_len)
1356 max_hard_header_len = slave->dev->hard_header_len;
1357 }
8531c5ff 1358
b63365a2 1359done:
7f353bf2 1360 features |= (bond_dev->features & BOND_VLAN_FEATURES);
b63365a2 1361 bond_dev->features = netdev_fix_features(features, NULL);
54ef3137 1362 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1363
1364 return 0;
1365}
1366
872254dd
MS		 1367
1368static void bond_setup_by_slave(struct net_device *bond_dev,
1369 struct net_device *slave_dev)
1370{
d90a162a
MS		 1371 struct bonding *bond = bond_dev->priv;
1372
872254dd 1373 bond_dev->neigh_setup = slave_dev->neigh_setup;
1284cd3a 1374 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1375
1376 bond_dev->type = slave_dev->type;
1377 bond_dev->hard_header_len = slave_dev->hard_header_len;
1378 bond_dev->addr_len = slave_dev->addr_len;
1379
1380 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1381 slave_dev->addr_len);
d90a162a 1382 bond->setup_by_slave = 1;
872254dd
MS		 1383}
1384
1da177e4 1385/* enslave device <slave> to bond device <master> */
a77b5325 1386int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1387{
1388 struct bonding *bond = bond_dev->priv;
1389 struct slave *new_slave = NULL;
1390 struct dev_mc_list *dmi;
1391 struct sockaddr addr;
1392 int link_reporting;
1393 int old_features = bond_dev->features;
1394 int res = 0;
1395
552709d5 1396 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1397 slave_dev->do_ioctl == NULL) {
1da177e4 1398 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1399 ": %s: Warning: no link monitoring support for %s\n",
1400 bond_dev->name, slave_dev->name);
1da177e4
LT		 1401 }
1402
1403 /* bond must be initialized by bond_open() before enslaving */
1404 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1405 printk(KERN_WARNING DRV_NAME
1406 " %s: master_dev is not up in bond_enslave\n",
1407 bond_dev->name);
1da177e4
LT		 1408 }
1409
1410 /* already enslaved */
1411 if (slave_dev->flags & IFF_SLAVE) {
1412 dprintk("Error, Device was already enslaved\n");
1413 return -EBUSY;
1414 }
1415
1416 /* vlan challenged mutual exclusion */
1417 /* no need to lock since we're protected by rtnl_lock */
1418 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1419 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1420 if (!list_empty(&bond->vlan_list)) {
1421 printk(KERN_ERR DRV_NAME
4e0952c7 1422 ": %s: Error: cannot enslave VLAN "
1da177e4 1423 "challenged slave %s on VLAN enabled "
4e0952c7 1424 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1425 bond_dev->name);
1426 return -EPERM;
1427 } else {
1428 printk(KERN_WARNING DRV_NAME
4e0952c7 1429 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1430 "slave %s. Adding VLANs will be blocked as "
1431 "long as %s is part of bond %s\n",
4e0952c7 1432 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1433 bond_dev->name);
1434 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1435 }
1436 } else {
1437 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1438 if (bond->slave_cnt == 0) {
1439 /* First slave, and it is not VLAN challenged,
1440 * so remove the block of adding VLANs over the bond.
1441 */
1442 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1443 }
1444 }
1445
217df670
JV		 1446 /*
1447 * Old ifenslave binaries are no longer supported. These can
1448 * be identified with moderate accurary by the state of the slave:
1449 * the current ifenslave will set the interface down prior to
1450 * enslaving it; the old ifenslave will not.
1451 */
1452 if ((slave_dev->flags & IFF_UP)) {
1453 printk(KERN_ERR DRV_NAME ": %s is up. "
1454 "This may be due to an out of date ifenslave.\n",
1455 slave_dev->name);
1456 res = -EPERM;
1457 goto err_undo_flags;
1458 }
1da177e4 1459
872254dd
MS		 1460 /* set bonding device ether type by slave - bonding netdevices are
1461 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1462 * there is a need to override some of the type dependent attribs/funcs.
1463 *
1464 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1465 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1466 */
1467 if (bond->slave_cnt == 0) {
1468 if (slave_dev->type != ARPHRD_ETHER)
1469 bond_setup_by_slave(bond_dev, slave_dev);
1470 } else if (bond_dev->type != slave_dev->type) {
1471 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1472 "from other slaves (%d), can not enslave it.\n",
1473 slave_dev->name,
1474 slave_dev->type, bond_dev->type);
1475 res = -EINVAL;
1476 goto err_undo_flags;
1477 }
1478
217df670 1479 if (slave_dev->set_mac_address == NULL) {
2ab82852
MS		 1480 if (bond->slave_cnt == 0) {
1481 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1482 ": %s: Warning: The first slave device "
1483 "specified does not support setting the MAC "
3915c1e8 1484 "address. Setting fail_over_mac to active.",
dd957c57 1485 bond_dev->name);
3915c1e8
JV		 1486 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1487 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852 1488 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1489 ": %s: Error: The slave device specified "
1490 "does not support setting the MAC address, "
3915c1e8 1491 "but fail_over_mac is not set to active.\n"
2ab82852
MS		 1492 , bond_dev->name);
1493 res = -EOPNOTSUPP;
1494 goto err_undo_flags;
1495 }
1da177e4
LT		 1496 }
1497
243cb4e5 1498 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1499 if (!new_slave) {
1500 res = -ENOMEM;
1501 goto err_undo_flags;
1502 }
1503
1da177e4
LT		 1504 /* save slave's original flags before calling
1505 * netdev_set_master and dev_open
1506 */
1507 new_slave->original_flags = slave_dev->flags;
1508
217df670
JV		 1509 /*
1510 * Save slave's original ("permanent") mac address for modes
1511 * that need it, and for restoring it upon release, and then
1512 * set it to the master's address
1513 */
1514 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1515
dd957c57 1516 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1517 /*
1518 * Set slave to master's mac address. The application already
1519 * set the master's mac address to that of the first slave
1520 */
1521 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1522 addr.sa_family = slave_dev->type;
1523 res = dev_set_mac_address(slave_dev, &addr);
1524 if (res) {
1525 dprintk("Error %d calling set_mac_address\n", res);
1526 goto err_free;
1527 }
217df670 1528 }
1da177e4 1529
c2edacf8
JV		 1530 res = netdev_set_master(slave_dev, bond_dev);
1531 if (res) {
1532 dprintk("Error %d calling netdev_set_master\n", res);
569f0c4d 1533 goto err_restore_mac;
c2edacf8 1534 }
217df670
JV		 1535 /* open the slave since the application closed it */
1536 res = dev_open(slave_dev);
1537 if (res) {
1538 dprintk("Openning slave %s failed\n", slave_dev->name);
569f0c4d 1539 goto err_unset_master;
1da177e4
LT		 1540 }
1541
1da177e4 1542 new_slave->dev = slave_dev;
0b680e75 1543 slave_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 1544
1545 if ((bond->params.mode == BOND_MODE_TLB) ||
1546 (bond->params.mode == BOND_MODE_ALB)) {
1547 /* bond_alb_init_slave() must be called before all other stages since
1548 * it might fail and we do not want to have to undo everything
1549 */
1550 res = bond_alb_init_slave(bond, new_slave);
1551 if (res) {
569f0c4d 1552 goto err_close;
1da177e4
LT		 1553 }
1554 }
1555
1556 /* If the mode USES_PRIMARY, then the new slave gets the
1557 * master's promisc (and mc) settings only if it becomes the
1558 * curr_active_slave, and that is taken care of later when calling
1559 * bond_change_active()
1560 */
1561 if (!USES_PRIMARY(bond->params.mode)) {
1562 /* set promiscuity level to new slave */
1563 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC		 1564 res = dev_set_promiscuity(slave_dev, 1);
1565 if (res)
1566 goto err_close;
1da177e4
LT		 1567 }
1568
1569 /* set allmulti level to new slave */
1570 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC		 1571 res = dev_set_allmulti(slave_dev, 1);
1572 if (res)
1573 goto err_close;
1da177e4
LT		 1574 }
1575
b9e40857 1576 netif_addr_lock_bh(bond_dev);
1da177e4
LT		 1577 /* upload master's mc_list to new slave */
1578 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1579 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1580 }
b9e40857 1581 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1582 }
1583
1584 if (bond->params.mode == BOND_MODE_8023AD) {
1585 /* add lacpdu mc addr to mc list */
1586 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1587
1588 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1589 }
1590
1591 bond_add_vlans_on_slave(bond, slave_dev);
1592
1593 write_lock_bh(&bond->lock);
1594
1595 bond_attach_slave(bond, new_slave);
1596
1597 new_slave->delay = 0;
1598 new_slave->link_failure_count = 0;
1599
8531c5ff
AK		 1600 bond_compute_features(bond);
1601
3915c1e8
JV		 1602 write_unlock_bh(&bond->lock);
1603
1604 read_lock(&bond->lock);
1605
f5b2b966
JV		 1606 new_slave->last_arp_rx = jiffies;
1607
1da177e4
LT		 1608 if (bond->params.miimon && !bond->params.use_carrier) {
1609 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1610
1611 if ((link_reporting == -1) && !bond->params.arp_interval) {
1612 /*
1613 * miimon is set but a bonded network driver
1614 * does not support ETHTOOL/MII and
1615 * arp_interval is not set. Note: if
1616 * use_carrier is enabled, we will never go
1617 * here (because netif_carrier is always
1618 * supported); thus, we don't need to change
1619 * the messages for netif_carrier.
1620 */
1621 printk(KERN_WARNING DRV_NAME
4e0952c7 1622 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1623 "available for interface %s, and "
1624 "arp_interval/arp_ip_target module parameters "
1625 "not specified, thus bonding will not detect "
1626 "link failures! see bonding.txt for details.\n",
4e0952c7 1627 bond_dev->name, slave_dev->name);
1da177e4
LT		 1628 } else if (link_reporting == -1) {
1629 /* unable get link status using mii/ethtool */
1630 printk(KERN_WARNING DRV_NAME
4e0952c7 1631 ": %s: Warning: can't get link status from "
1da177e4
LT		 1632 "interface %s; the network driver associated "
1633 "with this interface does not support MII or "
1634 "ETHTOOL link status reporting, thus miimon "
1635 "has no effect on this interface.\n",
4e0952c7 1636 bond_dev->name, slave_dev->name);
1da177e4
LT		 1637 }
1638 }
1639
1640 /* check for initial state */
1641 if (!bond->params.miimon ||
1642 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1643 if (bond->params.updelay) {
1644 dprintk("Initial state of slave_dev is "
1645 "BOND_LINK_BACK\n");
1646 new_slave->link = BOND_LINK_BACK;
1647 new_slave->delay = bond->params.updelay;
1648 } else {
1649 dprintk("Initial state of slave_dev is "
1650 "BOND_LINK_UP\n");
1651 new_slave->link = BOND_LINK_UP;
1652 }
1653 new_slave->jiffies = jiffies;
1654 } else {
1655 dprintk("Initial state of slave_dev is "
1656 "BOND_LINK_DOWN\n");
1657 new_slave->link = BOND_LINK_DOWN;
1658 }
1659
1660 if (bond_update_speed_duplex(new_slave) &&
1661 (new_slave->link != BOND_LINK_DOWN)) {
1662 printk(KERN_WARNING DRV_NAME
4e0952c7 1663 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1664 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1665 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1666
1667 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1668 printk(KERN_WARNING DRV_NAME
1669 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1670 "support in base driver for proper aggregator "
4e0952c7 1671 "selection.\n", bond_dev->name);
1da177e4
LT		 1672 }
1673 }
1674
1675 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1676 /* if there is a primary slave, remember it */
1677 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1678 bond->primary_slave = new_slave;
1679 }
1680 }
1681
3915c1e8
JV		 1682 write_lock_bh(&bond->curr_slave_lock);
1683
1da177e4
LT		 1684 switch (bond->params.mode) {
1685 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1686 bond_set_slave_inactive_flags(new_slave);
1687 bond_select_active_slave(bond);
1da177e4
LT		 1688 break;
1689 case BOND_MODE_8023AD:
1690 /* in 802.3ad mode, the internal mechanism
1691 * will activate the slaves in the selected
1692 * aggregator
1693 */
1694 bond_set_slave_inactive_flags(new_slave);
1695 /* if this is the first slave */
1696 if (bond->slave_cnt == 1) {
1697 SLAVE_AD_INFO(new_slave).id = 1;
1698 /* Initialize AD with the number of times that the AD timer is called in 1 second
1699 * can be called only after the mac address of the bond is set
1700 */
1701 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1702 bond->params.lacp_fast);
1703 } else {
1704 SLAVE_AD_INFO(new_slave).id =
1705 SLAVE_AD_INFO(new_slave->prev).id + 1;
1706 }
1707
1708 bond_3ad_bind_slave(new_slave);
1709 break;
1710 case BOND_MODE_TLB:
1711 case BOND_MODE_ALB:
1712 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1713 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1714 break;
1715 default:
1716 dprintk("This slave is always active in trunk mode\n");
1717
1718 /* always active in trunk mode */
1719 new_slave->state = BOND_STATE_ACTIVE;
1720
1721 /* In trunking mode there is little meaning to curr_active_slave
1722 * anyway (it holds no special properties of the bond device),
1723 * so we can change it without calling change_active_interface()
1724 */
1725 if (!bond->curr_active_slave) {
1726 bond->curr_active_slave = new_slave;
1727 }
1728 break;
1729 } /* switch(bond_mode) */
1730
3915c1e8
JV		 1731 write_unlock_bh(&bond->curr_slave_lock);
1732
ff59c456
JV		 1733 bond_set_carrier(bond);
1734
3915c1e8 1735 read_unlock(&bond->lock);
1da177e4 1736
b76cdba9
MW		 1737 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1738 if (res)
569f0c4d 1739 goto err_close;
b76cdba9 1740
1da177e4
LT		 1741 printk(KERN_INFO DRV_NAME
1742 ": %s: enslaving %s as a%s interface with a%s link.\n",
1743 bond_dev->name, slave_dev->name,
1744 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1745 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1746
1747 /* enslave is successful */
1748 return 0;
1749
1750/* Undo stages on error */
1da177e4
LT		 1751err_close:
1752 dev_close(slave_dev);
1753
569f0c4d
JV		 1754err_unset_master:
1755 netdev_set_master(slave_dev, NULL);
1756
1da177e4 1757err_restore_mac:
dd957c57 1758 if (!bond->params.fail_over_mac) {
3915c1e8
JV		 1759 /* XXX TODO - fom follow mode needs to change master's
1760 * MAC if this slave's MAC is in use by the bond, or at
1761 * least print a warning.
1762 */
2ab82852
MS		 1763 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1764 addr.sa_family = slave_dev->type;
1765 dev_set_mac_address(slave_dev, &addr);
1766 }
1da177e4
LT		 1767
1768err_free:
1769 kfree(new_slave);
1770
1771err_undo_flags:
1772 bond_dev->features = old_features;
8531c5ff 1773
1da177e4
LT		 1774 return res;
1775}
1776
1777/*
1778 * Try to release the slave device <slave> from the bond device <master>
1779 * It is legal to access curr_active_slave without a lock because all the function
1780 * is write-locked.
1781 *
1782 * The rules for slave state should be:
1783 * for Active/Backup:
1784 * Active stays on all backups go down
1785 * for Bonded connections:
1786 * The first up interface should be left on and all others downed.
1787 */
a77b5325 1788int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1789{
1790 struct bonding *bond = bond_dev->priv;
1791 struct slave *slave, *oldcurrent;
1792 struct sockaddr addr;
1793 int mac_addr_differ;
0795af57 1794 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1795
1796 /* slave is not a slave or master is not master of this slave */
1797 if (!(slave_dev->flags & IFF_SLAVE) ||
1798 (slave_dev->master != bond_dev)) {
1799 printk(KERN_ERR DRV_NAME
4e0952c7 1800 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1801 bond_dev->name, slave_dev->name);
1802 return -EINVAL;
1803 }
1804
1805 write_lock_bh(&bond->lock);
1806
1807 slave = bond_get_slave_by_dev(bond, slave_dev);
1808 if (!slave) {
1809 /* not a slave of this bond */
1810 printk(KERN_INFO DRV_NAME
1811 ": %s: %s not enslaved\n",
1812 bond_dev->name, slave_dev->name);
f5e2a7b2 1813 write_unlock_bh(&bond->lock);
1da177e4
LT		 1814 return -EINVAL;
1815 }
1816
3915c1e8
JV		 1817 if (!bond->params.fail_over_mac) {
1818 mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr,
1819 ETH_ALEN);
1820 if (!mac_addr_differ && (bond->slave_cnt > 1))
1821 printk(KERN_WARNING DRV_NAME
1822 ": %s: Warning: the permanent HWaddr of %s - "
1823 "%s - is still in use by %s. "
1824 "Set the HWaddr of %s to a different address "
1825 "to avoid conflicts.\n",
1826 bond_dev->name, slave_dev->name,
1827 print_mac(mac, slave->perm_hwaddr),
1828 bond_dev->name, slave_dev->name);
1da177e4
LT		 1829 }
1830
1831 /* Inform AD package of unbinding of slave. */
1832 if (bond->params.mode == BOND_MODE_8023AD) {
1833 /* must be called before the slave is
1834 * detached from the list
1835 */
1836 bond_3ad_unbind_slave(slave);
1837 }
1838
1839 printk(KERN_INFO DRV_NAME
1840 ": %s: releasing %s interface %s\n",
1841 bond_dev->name,
1842 (slave->state == BOND_STATE_ACTIVE)
1843 ? "active" : "backup",
1844 slave_dev->name);
1845
1846 oldcurrent = bond->curr_active_slave;
1847
1848 bond->current_arp_slave = NULL;
1849
1850 /* release the slave from its bond */
1851 bond_detach_slave(bond, slave);
1852
8531c5ff
AK		 1853 bond_compute_features(bond);
1854
1da177e4
LT		 1855 if (bond->primary_slave == slave) {
1856 bond->primary_slave = NULL;
1857 }
1858
1859 if (oldcurrent == slave) {
1860 bond_change_active_slave(bond, NULL);
1861 }
1862
1863 if ((bond->params.mode == BOND_MODE_TLB) ||
1864 (bond->params.mode == BOND_MODE_ALB)) {
1865 /* Must be called only after the slave has been
1866 * detached from the list and the curr_active_slave
1867 * has been cleared (if our_slave == old_current),
1868 * but before a new active slave is selected.
1869 */
2543331d 1870 write_unlock_bh(&bond->lock);
1da177e4 1871 bond_alb_deinit_slave(bond, slave);
2543331d 1872 write_lock_bh(&bond->lock);
1da177e4
LT		 1873 }
1874
059fe7a5
JV		 1875 if (oldcurrent == slave) {
1876 /*
1877 * Note that we hold RTNL over this sequence, so there
1878 * is no concern that another slave add/remove event
1879 * will interfere.
1880 */
1881 write_unlock_bh(&bond->lock);
1882 read_lock(&bond->lock);
1883 write_lock_bh(&bond->curr_slave_lock);
1884
1da177e4
LT		 1885 bond_select_active_slave(bond);
1886
059fe7a5
JV		 1887 write_unlock_bh(&bond->curr_slave_lock);
1888 read_unlock(&bond->lock);
1889 write_lock_bh(&bond->lock);
1890 }
1891
1da177e4 1892 if (bond->slave_cnt == 0) {
ff59c456
JV		 1893 bond_set_carrier(bond);
1894
1da177e4
LT		 1895 /* if the last slave was removed, zero the mac address
1896 * of the master so it will be set by the application
1897 * to the mac address of the first slave
1898 */
1899 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1900
1901 if (list_empty(&bond->vlan_list)) {
1902 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1903 } else {
1904 printk(KERN_WARNING DRV_NAME
4e0952c7 1905 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1906 "still has VLANs.\n",
4e0952c7 1907 bond_dev->name, bond_dev->name);
1da177e4 1908 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1909 ": %s: When re-adding slaves, make sure the bond's "
1910 "HW address matches its VLANs'.\n",
1911 bond_dev->name);
1da177e4
LT		 1912 }
1913 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1914 !bond_has_challenged_slaves(bond)) {
1915 printk(KERN_INFO DRV_NAME
4e0952c7 1916 ": %s: last VLAN challenged slave %s "
1da177e4 1917 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1918 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1919 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1920 }
1921
1922 write_unlock_bh(&bond->lock);
1923
b76cdba9
MW		 1924 /* must do this from outside any spinlocks */
1925 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1926
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 */
b9e40857 1945 netif_addr_lock_bh(bond_dev);
1da177e4 1946 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 1947 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1948 }
1949
1950 netdev_set_master(slave_dev, NULL);
1951
1952 /* close slave before restoring its mac address */
1953 dev_close(slave_dev);
1954
3915c1e8 1955 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852
MS		 1956 /* restore original ("permanent") mac address */
1957 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1958 addr.sa_family = slave_dev->type;
1959 dev_set_mac_address(slave_dev, &addr);
1960 }
1da177e4 1961
8f903c70 1962 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1963 IFF_SLAVE_INACTIVE | IFF_BONDING |
1964 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1965
1966 kfree(slave);
1967
1968 return 0; /* deletion OK */
1969}
1970
d90a162a
MS		 1971/*
1972* Destroy a bonding device.
1973* Must be under rtnl_lock when this function is called.
1974*/
1975void bond_destroy(struct bonding *bond)
1976{
1977 bond_deinit(bond->dev);
1978 bond_destroy_sysfs_entry(bond);
8cbdeec6 1979 unregister_netdevice(bond->dev);
d90a162a
MS		 1980}
1981
1982/*
1983* First release a slave and than destroy the bond if no more slaves iare left.
1984* Must be under rtnl_lock when this function is called.
1985*/
1986int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1987{
1988 struct bonding *bond = bond_dev->priv;
1989 int ret;
1990
1991 ret = bond_release(bond_dev, slave_dev);
1992 if ((ret == 0) && (bond->slave_cnt == 0)) {
1993 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1994 bond_dev->name, bond_dev->name);
1995 bond_destroy(bond);
1996 }
1997 return ret;
1998}
1999
1da177e4
LT		 2000/*
2001 * This function releases all slaves.
2002 */
2003static int bond_release_all(struct net_device *bond_dev)
2004{
2005 struct bonding *bond = bond_dev->priv;
2006 struct slave *slave;
2007 struct net_device *slave_dev;
2008 struct sockaddr addr;
2009
2010 write_lock_bh(&bond->lock);
2011
ff59c456
JV		 2012 netif_carrier_off(bond_dev);
2013
1da177e4
LT		 2014 if (bond->slave_cnt == 0) {
2015 goto out;
2016 }
2017
2018 bond->current_arp_slave = NULL;
2019 bond->primary_slave = NULL;
2020 bond_change_active_slave(bond, NULL);
2021
2022 while ((slave = bond->first_slave) != NULL) {
2023 /* Inform AD package of unbinding of slave
2024 * before slave is detached from the list.
2025 */
2026 if (bond->params.mode == BOND_MODE_8023AD) {
2027 bond_3ad_unbind_slave(slave);
2028 }
2029
2030 slave_dev = slave->dev;
2031 bond_detach_slave(bond, slave);
2032
2543331d
JV		 2033 /* now that the slave is detached, unlock and perform
2034 * all the undo steps that should not be called from
2035 * within a lock.
2036 */
2037 write_unlock_bh(&bond->lock);
2038
1da177e4
LT		 2039 if ((bond->params.mode == BOND_MODE_TLB) ||
2040 (bond->params.mode == BOND_MODE_ALB)) {
2041 /* must be called only after the slave
2042 * has been detached from the list
2043 */
2044 bond_alb_deinit_slave(bond, slave);
2045 }
2046
8531c5ff
AK		 2047 bond_compute_features(bond);
2048
b76cdba9 2049 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 2050 bond_del_vlans_from_slave(bond, slave_dev);
2051
2052 /* If the mode USES_PRIMARY, then we should only remove its
2053 * promisc and mc settings if it was the curr_active_slave, but that was
2054 * already taken care of above when we detached the slave
2055 */
2056 if (!USES_PRIMARY(bond->params.mode)) {
2057 /* unset promiscuity level from slave */
2058 if (bond_dev->flags & IFF_PROMISC) {
2059 dev_set_promiscuity(slave_dev, -1);
2060 }
2061
2062 /* unset allmulti level from slave */
2063 if (bond_dev->flags & IFF_ALLMULTI) {
2064 dev_set_allmulti(slave_dev, -1);
2065 }
2066
2067 /* flush master's mc_list from slave */
b9e40857 2068 netif_addr_lock_bh(bond_dev);
1da177e4 2069 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2070 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 2071 }
2072
2073 netdev_set_master(slave_dev, NULL);
2074
2075 /* close slave before restoring its mac address */
2076 dev_close(slave_dev);
2077
dd957c57 2078 if (!bond->params.fail_over_mac) {
2ab82852
MS		 2079 /* restore original ("permanent") mac address*/
2080 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2081 addr.sa_family = slave_dev->type;
2082 dev_set_mac_address(slave_dev, &addr);
2083 }
1da177e4 2084
8f903c70
JV		 2085 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2086 IFF_SLAVE_INACTIVE);
1da177e4
LT		 2087
2088 kfree(slave);
2089
2090 /* re-acquire the lock before getting the next slave */
2091 write_lock_bh(&bond->lock);
2092 }
2093
2094 /* zero the mac address of the master so it will be
2095 * set by the application to the mac address of the
2096 * first slave
2097 */
2098 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2099
2100 if (list_empty(&bond->vlan_list)) {
2101 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2102 } else {
2103 printk(KERN_WARNING DRV_NAME
4e0952c7 2104 ": %s: Warning: clearing HW address of %s while it "
1da177e4 2105 "still has VLANs.\n",
4e0952c7 2106 bond_dev->name, bond_dev->name);
1da177e4 2107 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 2108 ": %s: When re-adding slaves, make sure the bond's "
2109 "HW address matches its VLANs'.\n",
2110 bond_dev->name);
1da177e4
LT		 2111 }
2112
2113 printk(KERN_INFO DRV_NAME
2114 ": %s: released all slaves\n",
2115 bond_dev->name);
2116
2117out:
2118 write_unlock_bh(&bond->lock);
2119
2120 return 0;
2121}
2122
2123/*
2124 * This function changes the active slave to slave <slave_dev>.
2125 * It returns -EINVAL in the following cases.
2126 * - <slave_dev> is not found in the list.
2127 * - There is not active slave now.
2128 * - <slave_dev> is already active.
2129 * - The link state of <slave_dev> is not BOND_LINK_UP.
2130 * - <slave_dev> is not running.
2131 * In these cases, this fuction does nothing.
2132 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2133 */
2134static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2135{
2136 struct bonding *bond = bond_dev->priv;
2137 struct slave *old_active = NULL;
2138 struct slave *new_active = NULL;
2139 int res = 0;
2140
2141 if (!USES_PRIMARY(bond->params.mode)) {
2142 return -EINVAL;
2143 }
2144
2145 /* Verify that master_dev is indeed the master of slave_dev */
2146 if (!(slave_dev->flags & IFF_SLAVE) ||
2147 (slave_dev->master != bond_dev)) {
2148 return -EINVAL;
2149 }
2150
059fe7a5 2151 read_lock(&bond->lock);
1da177e4 2152
059fe7a5 2153 read_lock(&bond->curr_slave_lock);
1da177e4 2154 old_active = bond->curr_active_slave;
059fe7a5
JV		 2155 read_unlock(&bond->curr_slave_lock);
2156
1da177e4
LT		 2157 new_active = bond_get_slave_by_dev(bond, slave_dev);
2158
2159 /*
2160 * Changing to the current active: do nothing; return success.
2161 */
2162 if (new_active && (new_active == old_active)) {
059fe7a5 2163 read_unlock(&bond->lock);
1da177e4
LT		 2164 return 0;
2165 }
2166
2167 if ((new_active) &&
2168 (old_active) &&
2169 (new_active->link == BOND_LINK_UP) &&
2170 IS_UP(new_active->dev)) {
059fe7a5 2171 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2172 bond_change_active_slave(bond, new_active);
059fe7a5 2173 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2174 } else {
2175 res = -EINVAL;
2176 }
2177
059fe7a5 2178 read_unlock(&bond->lock);
1da177e4
LT		 2179
2180 return res;
2181}
2182
1da177e4
LT		 2183static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2184{
2185 struct bonding *bond = bond_dev->priv;
2186
2187 info->bond_mode = bond->params.mode;
2188 info->miimon = bond->params.miimon;
2189
6603a6f2 2190 read_lock(&bond->lock);
1da177e4 2191 info->num_slaves = bond->slave_cnt;
6603a6f2 2192 read_unlock(&bond->lock);
1da177e4
LT		 2193
2194 return 0;
2195}
2196
2197static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2198{
2199 struct bonding *bond = bond_dev->priv;
2200 struct slave *slave;
2201 int i, found = 0;
2202
2203 if (info->slave_id < 0) {
2204 return -ENODEV;
2205 }
2206
6603a6f2 2207 read_lock(&bond->lock);
1da177e4
LT		 2208
2209 bond_for_each_slave(bond, slave, i) {
2210 if (i == (int)info->slave_id) {
2211 found = 1;
2212 break;
2213 }
2214 }
2215
6603a6f2 2216 read_unlock(&bond->lock);
1da177e4
LT		 2217
2218 if (found) {
2219 strcpy(info->slave_name, slave->dev->name);
2220 info->link = slave->link;
2221 info->state = slave->state;
2222 info->link_failure_count = slave->link_failure_count;
2223 } else {
2224 return -ENODEV;
2225 }
2226
2227 return 0;
2228}
2229
2230/*-------------------------------- Monitoring -------------------------------*/
2231
1da177e4 2232
f0c76d61
JV		 2233static int bond_miimon_inspect(struct bonding *bond)
2234{
2235 struct slave *slave;
2236 int i, link_state, commit = 0;
1da177e4
LT		 2237
2238 bond_for_each_slave(bond, slave, i) {
f0c76d61 2239 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2240
f0c76d61 2241 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT		 2242
2243 switch (slave->link) {
f0c76d61
JV		 2244 case BOND_LINK_UP:
2245 if (link_state)
2246 continue;
1da177e4 2247
f0c76d61
JV		 2248 slave->link = BOND_LINK_FAIL;
2249 slave->delay = bond->params.downdelay;
2250 if (slave->delay) {
2251 printk(KERN_INFO DRV_NAME
2252 ": %s: link status down for %s"
2253 "interface %s, disabling it in %d ms.\n",
2254 bond->dev->name,
2255 (bond->params.mode ==
2256 BOND_MODE_ACTIVEBACKUP) ?
2257 ((slave->state == BOND_STATE_ACTIVE) ?
2258 "active " : "backup ") : "",
2259 slave->dev->name,
2260 bond->params.downdelay * bond->params.miimon);
1da177e4 2261 }
f0c76d61
JV		 2262 /*FALLTHRU*/
2263 case BOND_LINK_FAIL:
2264 if (link_state) {
2265 /*
2266 * recovered before downdelay expired
2267 */
2268 slave->link = BOND_LINK_UP;
1da177e4
LT		 2269 slave->jiffies = jiffies;
2270 printk(KERN_INFO DRV_NAME
2271 ": %s: link status up again after %d "
2272 "ms for interface %s.\n",
1b76b316 2273 bond->dev->name,
f0c76d61
JV		 2274 (bond->params.downdelay - slave->delay) *
2275 bond->params.miimon,
2276 slave->dev->name);
2277 continue;
1da177e4 2278 }
f0c76d61
JV		 2279
2280 if (slave->delay <= 0) {
2281 slave->new_link = BOND_LINK_DOWN;
2282 commit++;
2283 continue;
1da177e4 2284 }
1da177e4 2285
f0c76d61
JV		 2286 slave->delay--;
2287 break;
2288
2289 case BOND_LINK_DOWN:
2290 if (!link_state)
2291 continue;
2292
2293 slave->link = BOND_LINK_BACK;
2294 slave->delay = bond->params.updelay;
2295
2296 if (slave->delay) {
2297 printk(KERN_INFO DRV_NAME
2298 ": %s: link status up for "
2299 "interface %s, enabling it in %d ms.\n",
2300 bond->dev->name, slave->dev->name,
2301 bond->params.updelay *
2302 bond->params.miimon);
2303 }
2304 /*FALLTHRU*/
2305 case BOND_LINK_BACK:
2306 if (!link_state) {
2307 slave->link = BOND_LINK_DOWN;
1da177e4
LT		 2308 printk(KERN_INFO DRV_NAME
2309 ": %s: link status down again after %d "
2310 "ms for interface %s.\n",
1b76b316 2311 bond->dev->name,
f0c76d61
JV		 2312 (bond->params.updelay - slave->delay) *
2313 bond->params.miimon,
2314 slave->dev->name);
2315
2316 continue;
2317 }
2318
2319 if (slave->delay <= 0) {
2320 slave->new_link = BOND_LINK_UP;
2321 commit++;
2322 continue;
1da177e4 2323 }
f0c76d61
JV		 2324
2325 slave->delay--;
1da177e4 2326 break;
f0c76d61
JV		 2327 }
2328 }
1da177e4 2329
f0c76d61
JV		 2330 return commit;
2331}
1da177e4 2332
f0c76d61
JV		 2333static void bond_miimon_commit(struct bonding *bond)
2334{
2335 struct slave *slave;
2336 int i;
2337
2338 bond_for_each_slave(bond, slave, i) {
2339 switch (slave->new_link) {
2340 case BOND_LINK_NOCHANGE:
2341 continue;
1da177e4 2342
f0c76d61
JV		 2343 case BOND_LINK_UP:
2344 slave->link = BOND_LINK_UP;
2345 slave->jiffies = jiffies;
2346
2347 if (bond->params.mode == BOND_MODE_8023AD) {
2348 /* prevent it from being the active one */
2349 slave->state = BOND_STATE_BACKUP;
2350 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2351 /* make it immediately active */
2352 slave->state = BOND_STATE_ACTIVE;
2353 } else if (slave != bond->primary_slave) {
2354 /* prevent it from being the active one */
2355 slave->state = BOND_STATE_BACKUP;
1da177e4 2356 }
1da177e4 2357
f0c76d61
JV		 2358 printk(KERN_INFO DRV_NAME
2359 ": %s: link status definitely "
2360 "up for interface %s.\n",
2361 bond->dev->name, slave->dev->name);
1da177e4 2362
f0c76d61
JV		 2363 /* notify ad that the link status has changed */
2364 if (bond->params.mode == BOND_MODE_8023AD)
2365 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2366
f0c76d61
JV		 2367 if ((bond->params.mode == BOND_MODE_TLB) ||
2368 (bond->params.mode == BOND_MODE_ALB))
2369 bond_alb_handle_link_change(bond, slave,
2370 BOND_LINK_UP);
1da177e4 2371
f0c76d61
JV		 2372 if (!bond->curr_active_slave ||
2373 (slave == bond->primary_slave))
2374 goto do_failover;
1da177e4 2375
f0c76d61 2376 continue;
059fe7a5 2377
f0c76d61
JV		 2378 case BOND_LINK_DOWN:
2379 slave->link = BOND_LINK_DOWN;
1da177e4 2380
f0c76d61
JV		 2381 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2382 bond->params.mode == BOND_MODE_8023AD)
2383 bond_set_slave_inactive_flags(slave);
2384
2385 printk(KERN_INFO DRV_NAME
2386 ": %s: link status definitely down for "
2387 "interface %s, disabling it\n",
2388 bond->dev->name, slave->dev->name);
2389
2390 if (bond->params.mode == BOND_MODE_8023AD)
2391 bond_3ad_handle_link_change(slave,
2392 BOND_LINK_DOWN);
2393
2394 if (bond->params.mode == BOND_MODE_TLB ||
2395 bond->params.mode == BOND_MODE_ALB)
2396 bond_alb_handle_link_change(bond, slave,
2397 BOND_LINK_DOWN);
2398
2399 if (slave == bond->curr_active_slave)
2400 goto do_failover;
2401
2402 continue;
2403
2404 default:
2405 printk(KERN_ERR DRV_NAME
2406 ": %s: invalid new link %d on slave %s\n",
2407 bond->dev->name, slave->new_link,
2408 slave->dev->name);
2409 slave->new_link = BOND_LINK_NOCHANGE;
2410
2411 continue;
2412 }
2413
2414do_failover:
2415 ASSERT_RTNL();
2416 write_lock_bh(&bond->curr_slave_lock);
2417 bond_select_active_slave(bond);
2418 write_unlock_bh(&bond->curr_slave_lock);
2419 }
2420
2421 bond_set_carrier(bond);
1da177e4
LT		 2422}
2423
0b0eef66
JV		 2424/*
2425 * bond_mii_monitor
2426 *
2427 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV		 2428 * inspection, then (if inspection indicates something needs to be done)
2429 * an acquisition of appropriate locks followed by a commit phase to
2430 * implement whatever link state changes are indicated.
0b0eef66
JV		 2431 */
2432void bond_mii_monitor(struct work_struct *work)
2433{
2434 struct bonding *bond = container_of(work, struct bonding,
2435 mii_work.work);
0b0eef66
JV		 2436
2437 read_lock(&bond->lock);
f0c76d61
JV		 2438 if (bond->kill_timers)
2439 goto out;
2440
2441 if (bond->slave_cnt == 0)
2442 goto re_arm;
b59f9f74
JV		 2443
2444 if (bond->send_grat_arp) {
2445 read_lock(&bond->curr_slave_lock);
2446 bond_send_gratuitous_arp(bond);
2447 read_unlock(&bond->curr_slave_lock);
2448 }
2449
f0c76d61 2450 if (bond_miimon_inspect(bond)) {
0b0eef66
JV		 2451 read_unlock(&bond->lock);
2452 rtnl_lock();
2453 read_lock(&bond->lock);
f0c76d61
JV		 2454
2455 bond_miimon_commit(bond);
2456
5655662d
JV		 2457 read_unlock(&bond->lock);
2458 rtnl_unlock(); /* might sleep, hold no other locks */
2459 read_lock(&bond->lock);
0b0eef66
JV		 2460 }
2461
f0c76d61
JV		 2462re_arm:
2463 if (bond->params.miimon)
2464 queue_delayed_work(bond->wq, &bond->mii_work,
2465 msecs_to_jiffies(bond->params.miimon));
2466out:
0b0eef66 2467 read_unlock(&bond->lock);
0b0eef66 2468}
c3ade5ca 2469
d3bb52b0 2470static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2471{
2472 struct in_device *idev;
2473 struct in_ifaddr *ifa;
a144ea4b 2474 __be32 addr = 0;
c3ade5ca
JV		 2475
2476 if (!dev)
2477 return 0;
2478
2479 rcu_read_lock();
e5ed6399 2480 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2481 if (!idev)
2482 goto out;
2483
2484 ifa = idev->ifa_list;
2485 if (!ifa)
2486 goto out;
2487
2488 addr = ifa->ifa_local;
2489out:
2490 rcu_read_unlock();
2491 return addr;
2492}
2493
d3bb52b0 2494static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2495{
0883beca 2496 struct vlan_entry *vlan;
f5b2b966
JV		 2497
2498 if (ip == bond->master_ip)
2499 return 1;
2500
0883beca 2501 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f5b2b966
JV		 2502 if (ip == vlan->vlan_ip)
2503 return 1;
2504 }
2505
2506 return 0;
2507}
2508
c3ade5ca
JV		 2509/*
2510 * We go to the (large) trouble of VLAN tagging ARP frames because
2511 * switches in VLAN mode (especially if ports are configured as
2512 * "native" to a VLAN) might not pass non-tagged frames.
2513 */
d3bb52b0 2514static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2515{
2516 struct sk_buff *skb;
2517
2518 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2519 slave_dev->name, dest_ip, src_ip, vlan_id);
2520
2521 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2522 NULL, slave_dev->dev_addr, NULL);
2523
2524 if (!skb) {
2525 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2526 return;
2527 }
2528 if (vlan_id) {
2529 skb = vlan_put_tag(skb, vlan_id);
2530 if (!skb) {
2531 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2532 return;
2533 }
2534 }
2535 arp_xmit(skb);
2536}
2537
2538
1da177e4
LT		 2539static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2540{
c3ade5ca 2541 int i, vlan_id, rv;
d3bb52b0 2542 __be32 *targets = bond->params.arp_targets;
0883beca 2543 struct vlan_entry *vlan;
c3ade5ca
JV		 2544 struct net_device *vlan_dev;
2545 struct flowi fl;
2546 struct rtable *rt;
1da177e4 2547
6b780567
MW		 2548 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2549 if (!targets[i])
2550 continue;
c3ade5ca
JV		 2551 dprintk("basa: target %x\n", targets[i]);
2552 if (list_empty(&bond->vlan_list)) {
2553 dprintk("basa: empty vlan: arp_send\n");
2554 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2555 bond->master_ip, 0);
2556 continue;
2557 }
2558
2559 /*
2560 * If VLANs are configured, we do a route lookup to
2561 * determine which VLAN interface would be used, so we
2562 * can tag the ARP with the proper VLAN tag.
2563 */
2564 memset(&fl, 0, sizeof(fl));
2565 fl.fl4_dst = targets[i];
2566 fl.fl4_tos = RTO_ONLINK;
2567
f206351a 2568 rv = ip_route_output_key(&init_net, &rt, &fl);
c3ade5ca
JV		 2569 if (rv) {
2570 if (net_ratelimit()) {
2571 printk(KERN_WARNING DRV_NAME
2572 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2573 bond->dev->name, NIPQUAD(fl.fl4_dst));
2574 }
2575 continue;
2576 }
2577
2578 /*
2579 * This target is not on a VLAN
2580 */
2581 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2582 ip_rt_put(rt);
c3ade5ca
JV		 2583 dprintk("basa: rtdev == bond->dev: arp_send\n");
2584 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2585 bond->master_ip, 0);
2586 continue;
2587 }
2588
2589 vlan_id = 0;
0883beca 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_dev == rt->u.dst.dev) {
2593 vlan_id = vlan->vlan_id;
2594 dprintk("basa: vlan match on %s %d\n",
2595 vlan_dev->name, vlan_id);
2596 break;
2597 }
2598 }
2599
2600 if (vlan_id) {
ed4b9f80 2601 ip_rt_put(rt);
c3ade5ca
JV		 2602 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2603 vlan->vlan_ip, vlan_id);
2604 continue;
2605 }
2606
2607 if (net_ratelimit()) {
2608 printk(KERN_WARNING DRV_NAME
2609 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2610 bond->dev->name, NIPQUAD(fl.fl4_dst),
2611 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2612 }
ed4b9f80 2613 ip_rt_put(rt);
c3ade5ca
JV		 2614 }
2615}
2616
2617/*
2618 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2619 * for each VLAN above us.
b59f9f74
JV		 2620 *
2621 * Caller must hold curr_slave_lock for read or better
c3ade5ca
JV		 2622 */
2623static void bond_send_gratuitous_arp(struct bonding *bond)
2624{
2625 struct slave *slave = bond->curr_active_slave;
2626 struct vlan_entry *vlan;
2627 struct net_device *vlan_dev;
2628
2629 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2630 slave ? slave->dev->name : "NULL");
b59f9f74
JV		 2631
2632 if (!slave || !bond->send_grat_arp ||
2633 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
c3ade5ca
JV		 2634 return;
2635
b59f9f74
JV		 2636 bond->send_grat_arp--;
2637
c3ade5ca
JV		 2638 if (bond->master_ip) {
2639 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2640 bond->master_ip, 0);
c3ade5ca
JV		 2641 }
2642
2643 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2644 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2645 if (vlan->vlan_ip) {
2646 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2647 vlan->vlan_ip, vlan->vlan_id);
2648 }
1da177e4
LT		 2649 }
2650}
2651
d3bb52b0 2652static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2653{
2654 int i;
d3bb52b0 2655 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2656
2657 targets = bond->params.arp_targets;
2658 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2659 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2660 "%u.%u.%u.%u bhti(tip) %d\n",
2661 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2662 bond_has_this_ip(bond, tip));
2663 if (sip == targets[i]) {
2664 if (bond_has_this_ip(bond, tip))
2665 slave->last_arp_rx = jiffies;
2666 return;
2667 }
2668 }
2669}
2670
2671static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2672{
2673 struct arphdr *arp;
2674 struct slave *slave;
2675 struct bonding *bond;
2676 unsigned char *arp_ptr;
d3bb52b0 2677 __be32 sip, tip;
f5b2b966 2678
c346dca1 2679 if (dev_net(dev) != &init_net)
e730c155
EB		 2680 goto out;
2681
f5b2b966
JV		 2682 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2683 goto out;
2684
2685 bond = dev->priv;
2686 read_lock(&bond->lock);
2687
2688 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2689 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2690 orig_dev ? orig_dev->name : "NULL");
2691
2692 slave = bond_get_slave_by_dev(bond, orig_dev);
2693 if (!slave || !slave_do_arp_validate(bond, slave))
2694 goto out_unlock;
2695
988b7050 2696 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
f5b2b966
JV		 2697 goto out_unlock;
2698
d0a92be0 2699 arp = arp_hdr(skb);
f5b2b966
JV		 2700 if (arp->ar_hln != dev->addr_len ||
2701 skb->pkt_type == PACKET_OTHERHOST ||
2702 skb->pkt_type == PACKET_LOOPBACK ||
2703 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2704 arp->ar_pro != htons(ETH_P_IP) ||
2705 arp->ar_pln != 4)
2706 goto out_unlock;
2707
2708 arp_ptr = (unsigned char *)(arp + 1);
2709 arp_ptr += dev->addr_len;
2710 memcpy(&sip, arp_ptr, 4);
2711 arp_ptr += 4 + dev->addr_len;
2712 memcpy(&tip, arp_ptr, 4);
2713
2714 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2715 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2716 slave->state, bond->params.arp_validate,
2717 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2718
2719 /*
2720 * Backup slaves won't see the ARP reply, but do come through
2721 * here for each ARP probe (so we swap the sip/tip to validate
2722 * the probe). In a "redundant switch, common router" type of
2723 * configuration, the ARP probe will (hopefully) travel from
2724 * the active, through one switch, the router, then the other
2725 * switch before reaching the backup.
2726 */
2727 if (slave->state == BOND_STATE_ACTIVE)
2728 bond_validate_arp(bond, slave, sip, tip);
2729 else
2730 bond_validate_arp(bond, slave, tip, sip);
2731
2732out_unlock:
2733 read_unlock(&bond->lock);
2734out:
2735 dev_kfree_skb(skb);
2736 return NET_RX_SUCCESS;
2737}
2738
1da177e4
LT		 2739/*
2740 * this function is called regularly to monitor each slave's link
2741 * ensuring that traffic is being sent and received when arp monitoring
2742 * is used in load-balancing mode. if the adapter has been dormant, then an
2743 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2744 * arp monitoring in active backup mode.
2745 */
1b76b316 2746void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2747{
1b76b316
JV		 2748 struct bonding *bond = container_of(work, struct bonding,
2749 arp_work.work);
1da177e4
LT		 2750 struct slave *slave, *oldcurrent;
2751 int do_failover = 0;
2752 int delta_in_ticks;
2753 int i;
2754
2755 read_lock(&bond->lock);
2756
5ce0da8f 2757 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4
LT		 2758
2759 if (bond->kill_timers) {
2760 goto out;
2761 }
2762
2763 if (bond->slave_cnt == 0) {
2764 goto re_arm;
2765 }
2766
2767 read_lock(&bond->curr_slave_lock);
2768 oldcurrent = bond->curr_active_slave;
2769 read_unlock(&bond->curr_slave_lock);
2770
2771 /* see if any of the previous devices are up now (i.e. they have
2772 * xmt and rcv traffic). the curr_active_slave does not come into
2773 * the picture unless it is null. also, slave->jiffies is not needed
2774 * here because we send an arp on each slave and give a slave as
2775 * long as it needs to get the tx/rx within the delta.
2776 * TODO: what about up/down delay in arp mode? it wasn't here before
2777 * so it can wait
2778 */
2779 bond_for_each_slave(bond, slave, i) {
2780 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2781 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2782 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2783
2784 slave->link = BOND_LINK_UP;
2785 slave->state = BOND_STATE_ACTIVE;
2786
2787 /* primary_slave has no meaning in round-robin
2788 * mode. the window of a slave being up and
2789 * curr_active_slave being null after enslaving
2790 * is closed.
2791 */
2792 if (!oldcurrent) {
2793 printk(KERN_INFO DRV_NAME
2794 ": %s: link status definitely "
2795 "up for interface %s, ",
1b76b316 2796 bond->dev->name,
1da177e4
LT		 2797 slave->dev->name);
2798 do_failover = 1;
2799 } else {
2800 printk(KERN_INFO DRV_NAME
2801 ": %s: interface %s is now up\n",
1b76b316 2802 bond->dev->name,
1da177e4
LT		 2803 slave->dev->name);
2804 }
2805 }
2806 } else {
2807 /* slave->link == BOND_LINK_UP */
2808
2809 /* not all switches will respond to an arp request
2810 * when the source ip is 0, so don't take the link down
2811 * if we don't know our ip yet
2812 */
b63bb739 2813 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
4b8a9239 2814 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
1da177e4
LT		 2815
2816 slave->link = BOND_LINK_DOWN;
2817 slave->state = BOND_STATE_BACKUP;
2818
2819 if (slave->link_failure_count < UINT_MAX) {
2820 slave->link_failure_count++;
2821 }
2822
2823 printk(KERN_INFO DRV_NAME
2824 ": %s: interface %s is now down.\n",
1b76b316 2825 bond->dev->name,
1da177e4
LT		 2826 slave->dev->name);
2827
2828 if (slave == oldcurrent) {
2829 do_failover = 1;
2830 }
2831 }
2832 }
2833
2834 /* note: if switch is in round-robin mode, all links
2835 * must tx arp to ensure all links rx an arp - otherwise
2836 * links may oscillate or not come up at all; if switch is
2837 * in something like xor mode, there is nothing we can
2838 * do - all replies will be rx'ed on same link causing slaves
2839 * to be unstable during low/no traffic periods
2840 */
2841 if (IS_UP(slave->dev)) {
2842 bond_arp_send_all(bond, slave);
2843 }
2844 }
2845
2846 if (do_failover) {
059fe7a5 2847 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2848
2849 bond_select_active_slave(bond);
2850
059fe7a5 2851 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2852 }
2853
2854re_arm:
1b76b316
JV		 2855 if (bond->params.arp_interval)
2856 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2857out:
2858 read_unlock(&bond->lock);
2859}
2860
2861/*
b2220cad
JV		 2862 * Called to inspect slaves for active-backup mode ARP monitor link state
2863 * changes. Sets new_link in slaves to specify what action should take
2864 * place for the slave. Returns 0 if no changes are found, >0 if changes
2865 * to link states must be committed.
2866 *
2867 * Called with bond->lock held for read.
1da177e4 2868 */
b2220cad 2869static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
1da177e4 2870{
1da177e4 2871 struct slave *slave;
b2220cad 2872 int i, commit = 0;
1da177e4 2873
b2220cad
JV		 2874 bond_for_each_slave(bond, slave, i) {
2875 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2876
b2220cad
JV		 2877 if (slave->link != BOND_LINK_UP) {
2878 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2879 delta_in_ticks)) {
2880 slave->new_link = BOND_LINK_UP;
2881 commit++;
2882 }
1da177e4 2883
b2220cad
JV		 2884 continue;
2885 }
1da177e4 2886
b2220cad
JV		 2887 /*
2888 * Give slaves 2*delta after being enslaved or made
2889 * active. This avoids bouncing, as the last receive
2890 * times need a full ARP monitor cycle to be updated.
2891 */
2892 if (!time_after_eq(jiffies, slave->jiffies +
2893 2 * delta_in_ticks))
2894 continue;
2895
2896 /*
2897 * Backup slave is down if:
2898 * - No current_arp_slave AND
2899 * - more than 3*delta since last receive AND
2900 * - the bond has an IP address
2901 *
2902 * Note: a non-null current_arp_slave indicates
2903 * the curr_active_slave went down and we are
2904 * searching for a new one; under this condition
2905 * we only take the curr_active_slave down - this
2906 * gives each slave a chance to tx/rx traffic
2907 * before being taken out
2908 */
2909 if (slave->state == BOND_STATE_BACKUP &&
2910 !bond->current_arp_slave &&
2911 time_after(jiffies, slave_last_rx(bond, slave) +
2912 3 * delta_in_ticks)) {
2913 slave->new_link = BOND_LINK_DOWN;
2914 commit++;
2915 }
2916
2917 /*
2918 * Active slave is down if:
2919 * - more than 2*delta since transmitting OR
2920 * - (more than 2*delta since receive AND
2921 * the bond has an IP address)
2922 */
2923 if ((slave->state == BOND_STATE_ACTIVE) &&
2924 (time_after_eq(jiffies, slave->dev->trans_start +
2925 2 * delta_in_ticks) ||
2926 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2927 + 2 * delta_in_ticks)))) {
2928 slave->new_link = BOND_LINK_DOWN;
2929 commit++;
2930 }
1da177e4
LT		 2931 }
2932
b2220cad
JV		 2933 read_lock(&bond->curr_slave_lock);
2934
2935 /*
2936 * Trigger a commit if the primary option setting has changed.
1da177e4 2937 */
b2220cad
JV		 2938 if (bond->primary_slave &&
2939 (bond->primary_slave != bond->curr_active_slave) &&
2940 (bond->primary_slave->link == BOND_LINK_UP))
2941 commit++;
1da177e4 2942
b2220cad 2943 read_unlock(&bond->curr_slave_lock);
1da177e4 2944
b2220cad
JV		 2945 return commit;
2946}
1da177e4 2947
b2220cad
JV		 2948/*
2949 * Called to commit link state changes noted by inspection step of
2950 * active-backup mode ARP monitor.
2951 *
2952 * Called with RTNL and bond->lock for read.
2953 */
2954static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2955{
2956 struct slave *slave;
2957 int i;
1da177e4 2958
b2220cad
JV		 2959 bond_for_each_slave(bond, slave, i) {
2960 switch (slave->new_link) {
2961 case BOND_LINK_NOCHANGE:
2962 continue;
ff59c456 2963
b2220cad
JV		 2964 case BOND_LINK_UP:
2965 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2966
b2220cad
JV		 2967 if (!bond->curr_active_slave &&
2968 time_before_eq(jiffies, slave->dev->trans_start +
2969 delta_in_ticks)) {
2970 slave->link = BOND_LINK_UP;
2971 bond_change_active_slave(bond, slave);
2972 bond->current_arp_slave = NULL;
2973
2974 printk(KERN_INFO DRV_NAME
2975 ": %s: %s is up and now the "
2976 "active interface\n",
2977 bond->dev->name, slave->dev->name);
2978
2979 } else if (bond->curr_active_slave != slave) {
2980 /* this slave has just come up but we
2981 * already have a current slave; this can
2982 * also happen if bond_enslave adds a new
2983 * slave that is up while we are searching
2984 * for a new slave
1da177e4 2985 */
b2220cad
JV		 2986 slave->link = BOND_LINK_UP;
2987 bond_set_slave_inactive_flags(slave);
2988 bond->current_arp_slave = NULL;
2989
2990 printk(KERN_INFO DRV_NAME
2991 ": %s: backup interface %s is now up\n",
2992 bond->dev->name, slave->dev->name);
2993 }
1da177e4 2994
b2220cad 2995 write_unlock_bh(&bond->curr_slave_lock);
1da177e4 2996
b2220cad 2997 break;
1da177e4 2998
b2220cad
JV		 2999 case BOND_LINK_DOWN:
3000 if (slave->link_failure_count < UINT_MAX)
3001 slave->link_failure_count++;
3002
3003 slave->link = BOND_LINK_DOWN;
3004
3005 if (slave == bond->curr_active_slave) {
3006 printk(KERN_INFO DRV_NAME
3007 ": %s: link status down for active "
3008 "interface %s, disabling it\n",
3009 bond->dev->name, slave->dev->name);
1da177e4
LT		 3010
3011 bond_set_slave_inactive_flags(slave);
3012
b2220cad
JV		 3013 write_lock_bh(&bond->curr_slave_lock);
3014
3015 bond_select_active_slave(bond);
3016 if (bond->curr_active_slave)
3017 bond->curr_active_slave->jiffies =
3018 jiffies;
3019
3020 write_unlock_bh(&bond->curr_slave_lock);
3021
3022 bond->current_arp_slave = NULL;
3023
3024 } else if (slave->state == BOND_STATE_BACKUP) {
1da177e4
LT		 3025 printk(KERN_INFO DRV_NAME
3026 ": %s: backup interface %s is now down\n",
b2220cad
JV		 3027 bond->dev->name, slave->dev->name);
3028
3029 bond_set_slave_inactive_flags(slave);
1da177e4 3030 }
b2220cad
JV		 3031 break;
3032
3033 default:
3034 printk(KERN_ERR DRV_NAME
3035 ": %s: impossible: new_link %d on slave %s\n",
3036 bond->dev->name, slave->new_link,
3037 slave->dev->name);
1da177e4
LT		 3038 }
3039 }
3040
b2220cad
JV		 3041 /*
3042 * No race with changes to primary via sysfs, as we hold rtnl.
3043 */
3044 if (bond->primary_slave &&
3045 (bond->primary_slave != bond->curr_active_slave) &&
3046 (bond->primary_slave->link == BOND_LINK_UP)) {
3047 write_lock_bh(&bond->curr_slave_lock);
3048 bond_change_active_slave(bond, bond->primary_slave);
3049 write_unlock_bh(&bond->curr_slave_lock);
3050 }
1da177e4 3051
b2220cad
JV		 3052 bond_set_carrier(bond);
3053}
1da177e4 3054
b2220cad
JV		 3055/*
3056 * Send ARP probes for active-backup mode ARP monitor.
3057 *
3058 * Called with bond->lock held for read.
3059 */
3060static void bond_ab_arp_probe(struct bonding *bond)
3061{
3062 struct slave *slave;
3063 int i;
1da177e4 3064
b2220cad 3065 read_lock(&bond->curr_slave_lock);
1da177e4 3066
b2220cad
JV		 3067 if (bond->current_arp_slave && bond->curr_active_slave)
3068 printk("PROBE: c_arp %s && cas %s BAD\n",
3069 bond->current_arp_slave->dev->name,
3070 bond->curr_active_slave->dev->name);
1da177e4 3071
b2220cad
JV		 3072 if (bond->curr_active_slave) {
3073 bond_arp_send_all(bond, bond->curr_active_slave);
3074 read_unlock(&bond->curr_slave_lock);
3075 return;
3076 }
1da177e4 3077
b2220cad 3078 read_unlock(&bond->curr_slave_lock);
059fe7a5 3079
b2220cad
JV		 3080 /* if we don't have a curr_active_slave, search for the next available
3081 * backup slave from the current_arp_slave and make it the candidate
3082 * for becoming the curr_active_slave
3083 */
1da177e4 3084
b2220cad
JV		 3085 if (!bond->current_arp_slave) {
3086 bond->current_arp_slave = bond->first_slave;
3087 if (!bond->current_arp_slave)
3088 return;
3089 }
1da177e4 3090
b2220cad 3091 bond_set_slave_inactive_flags(bond->current_arp_slave);
059fe7a5 3092
b2220cad
JV		 3093 /* search for next candidate */
3094 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3095 if (IS_UP(slave->dev)) {
3096 slave->link = BOND_LINK_BACK;
3097 bond_set_slave_active_flags(slave);
3098 bond_arp_send_all(bond, slave);
1da177e4 3099 slave->jiffies = jiffies;
b2220cad
JV		 3100 bond->current_arp_slave = slave;
3101 break;
1da177e4
LT		 3102 }
3103
b2220cad
JV		 3104 /* if the link state is up at this point, we
3105 * mark it down - this can happen if we have
3106 * simultaneous link failures and
3107 * reselect_active_interface doesn't make this
3108 * one the current slave so it is still marked
3109 * up when it is actually down
1da177e4 3110 */
b2220cad
JV		 3111 if (slave->link == BOND_LINK_UP) {
3112 slave->link = BOND_LINK_DOWN;
3113 if (slave->link_failure_count < UINT_MAX)
3114 slave->link_failure_count++;
1da177e4 3115
b2220cad
JV		 3116 bond_set_slave_inactive_flags(slave);
3117
3118 printk(KERN_INFO DRV_NAME
3119 ": %s: backup interface %s is now down.\n",
3120 bond->dev->name, slave->dev->name);
1da177e4 3121 }
b2220cad
JV		 3122 }
3123}
1da177e4 3124
b2220cad
JV		 3125void bond_activebackup_arp_mon(struct work_struct *work)
3126{
3127 struct bonding *bond = container_of(work, struct bonding,
3128 arp_work.work);
3129 int delta_in_ticks;
1da177e4 3130
b2220cad 3131 read_lock(&bond->lock);
1da177e4 3132
b2220cad
JV		 3133 if (bond->kill_timers)
3134 goto out;
1da177e4 3135
b2220cad 3136 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 3137
b2220cad
JV		 3138 if (bond->slave_cnt == 0)
3139 goto re_arm;
3140
b59f9f74
JV		 3141 if (bond->send_grat_arp) {
3142 read_lock(&bond->curr_slave_lock);
3143 bond_send_gratuitous_arp(bond);
3144 read_unlock(&bond->curr_slave_lock);
3145 }
3146
b2220cad
JV		 3147 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3148 read_unlock(&bond->lock);
3149 rtnl_lock();
3150 read_lock(&bond->lock);
3151
3152 bond_ab_arp_commit(bond, delta_in_ticks);
3153
3154 read_unlock(&bond->lock);
3155 rtnl_unlock();
3156 read_lock(&bond->lock);
1da177e4
LT		 3157 }
3158
b2220cad
JV		 3159 bond_ab_arp_probe(bond);
3160
1da177e4
LT		 3161re_arm:
3162 if (bond->params.arp_interval) {
1b76b316 3163 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3164 }
3165out:
3166 read_unlock(&bond->lock);
3167}
3168
3169/*------------------------------ proc/seq_file-------------------------------*/
3170
3171#ifdef CONFIG_PROC_FS
3172
1da177e4
LT		 3173static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3174{
3175 struct bonding *bond = seq->private;
3176 loff_t off = 0;
3177 struct slave *slave;
3178 int i;
3179
3180 /* make sure the bond won't be taken away */
3181 read_lock(&dev_base_lock);
6603a6f2 3182 read_lock(&bond->lock);
1da177e4
LT		 3183
3184 if (*pos == 0) {
3185 return SEQ_START_TOKEN;
3186 }
3187
3188 bond_for_each_slave(bond, slave, i) {
3189 if (++off == *pos) {
3190 return slave;
3191 }
3192 }
3193
3194 return NULL;
3195}
3196
3197static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3198{
3199 struct bonding *bond = seq->private;
3200 struct slave *slave = v;
3201
3202 ++*pos;
3203 if (v == SEQ_START_TOKEN) {
3204 return bond->first_slave;
3205 }
3206
3207 slave = slave->next;
3208
3209 return (slave == bond->first_slave) ? NULL : slave;
3210}
3211
3212static void bond_info_seq_stop(struct seq_file *seq, void *v)
3213{
3214 struct bonding *bond = seq->private;
3215
6603a6f2 3216 read_unlock(&bond->lock);
1da177e4
LT		 3217 read_unlock(&dev_base_lock);
3218}
3219
3220static void bond_info_show_master(struct seq_file *seq)
3221{
3222 struct bonding *bond = seq->private;
3223 struct slave *curr;
4756b02f
MW		 3224 int i;
3225 u32 target;
1da177e4
LT		 3226
3227 read_lock(&bond->curr_slave_lock);
3228 curr = bond->curr_active_slave;
3229 read_unlock(&bond->curr_slave_lock);
3230
dd957c57 3231 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3232 bond_mode_name(bond->params.mode));
3233
dd957c57
JV		 3234 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3235 bond->params.fail_over_mac)
3915c1e8
JV		 3236 seq_printf(seq, " (fail_over_mac %s)",
3237 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
dd957c57
JV		 3238
3239 seq_printf(seq, "\n");
3240
c61b75ad
MW		 3241 if (bond->params.mode == BOND_MODE_XOR ||
3242 bond->params.mode == BOND_MODE_8023AD) {
3243 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3244 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3245 bond->params.xmit_policy);
3246 }
3247
1da177e4
LT		 3248 if (USES_PRIMARY(bond->params.mode)) {
3249 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3250 (bond->primary_slave) ?
3251 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3252
3253 seq_printf(seq, "Currently Active Slave: %s\n",
3254 (curr) ? curr->dev->name : "None");
3255 }
3256
ff59c456
JV		 3257 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3258 "up" : "down");
1da177e4
LT		 3259 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3260 seq_printf(seq, "Up Delay (ms): %d\n",
3261 bond->params.updelay * bond->params.miimon);
3262 seq_printf(seq, "Down Delay (ms): %d\n",
3263 bond->params.downdelay * bond->params.miimon);
3264
4756b02f
MW		 3265
3266 /* ARP information */
3267 if(bond->params.arp_interval > 0) {
3268 int printed=0;
3269 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3270 bond->params.arp_interval);
3271
3272 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3273
3274 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3275 if (!bond->params.arp_targets[i])
3276 continue;
3277 if (printed)
3278 seq_printf(seq, ",");
3279 target = ntohl(bond->params.arp_targets[i]);
3280 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3281 printed = 1;
3282 }
3283 seq_printf(seq, "\n");
3284 }
3285
1da177e4
LT		 3286 if (bond->params.mode == BOND_MODE_8023AD) {
3287 struct ad_info ad_info;
0795af57 3288 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3289
3290 seq_puts(seq, "\n802.3ad info\n");
3291 seq_printf(seq, "LACP rate: %s\n",
3292 (bond->params.lacp_fast) ? "fast" : "slow");
3293
3294 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3295 seq_printf(seq, "bond %s has no active aggregator\n",
3296 bond->dev->name);
3297 } else {
3298 seq_printf(seq, "Active Aggregator Info:\n");
3299
3300 seq_printf(seq, "\tAggregator ID: %d\n",
3301 ad_info.aggregator_id);
3302 seq_printf(seq, "\tNumber of ports: %d\n",
3303 ad_info.ports);
3304 seq_printf(seq, "\tActor Key: %d\n",
3305 ad_info.actor_key);
3306 seq_printf(seq, "\tPartner Key: %d\n",
3307 ad_info.partner_key);
0795af57
JP		 3308 seq_printf(seq, "\tPartner Mac Address: %s\n",
3309 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3310 }
3311 }
3312}
3313
3314static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3315{
3316 struct bonding *bond = seq->private;
0795af57 3317 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3318
3319 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3320 seq_printf(seq, "MII Status: %s\n",
3321 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3322 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3323 slave->link_failure_count);
3324
217df670 3325 seq_printf(seq,
0795af57
JP		 3326 "Permanent HW addr: %s\n",
3327 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3328
3329 if (bond->params.mode == BOND_MODE_8023AD) {
3330 const struct aggregator *agg
3331 = SLAVE_AD_INFO(slave).port.aggregator;
3332
3333 if (agg) {
3334 seq_printf(seq, "Aggregator ID: %d\n",
3335 agg->aggregator_identifier);
3336 } else {
3337 seq_puts(seq, "Aggregator ID: N/A\n");
3338 }
3339 }
3340}
3341
3342static int bond_info_seq_show(struct seq_file *seq, void *v)
3343{
3344 if (v == SEQ_START_TOKEN) {
3345 seq_printf(seq, "%s\n", version);
3346 bond_info_show_master(seq);
3347 } else {
3348 bond_info_show_slave(seq, v);
3349 }
3350
3351 return 0;
3352}
3353
3354static struct seq_operations bond_info_seq_ops = {
3355 .start = bond_info_seq_start,
3356 .next = bond_info_seq_next,
3357 .stop = bond_info_seq_stop,
3358 .show = bond_info_seq_show,
3359};
3360
3361static int bond_info_open(struct inode *inode, struct file *file)
3362{
3363 struct seq_file *seq;
3364 struct proc_dir_entry *proc;
3365 int res;
3366
3367 res = seq_open(file, &bond_info_seq_ops);
3368 if (!res) {
3369 /* recover the pointer buried in proc_dir_entry data */
3370 seq = file->private_data;
3371 proc = PDE(inode);
3372 seq->private = proc->data;
3373 }
3374
3375 return res;
3376}
3377
d54b1fdb 3378static const struct file_operations bond_info_fops = {
1da177e4
LT		 3379 .owner = THIS_MODULE,
3380 .open = bond_info_open,
3381 .read = seq_read,
3382 .llseek = seq_lseek,
3383 .release = seq_release,
3384};
3385
3386static int bond_create_proc_entry(struct bonding *bond)
3387{
3388 struct net_device *bond_dev = bond->dev;
3389
3390 if (bond_proc_dir) {
a95609cb
DL		 3391 bond->proc_entry = proc_create_data(bond_dev->name,
3392 S_IRUGO, bond_proc_dir,
3393 &bond_info_fops, bond);
1da177e4
LT		 3394 if (bond->proc_entry == NULL) {
3395 printk(KERN_WARNING DRV_NAME
3396 ": Warning: Cannot create /proc/net/%s/%s\n",
3397 DRV_NAME, bond_dev->name);
3398 } else {
1da177e4
LT		 3399 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3400 }
3401 }
3402
3403 return 0;
3404}
3405
3406static void bond_remove_proc_entry(struct bonding *bond)
3407{
3408 if (bond_proc_dir && bond->proc_entry) {
3409 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3410 memset(bond->proc_file_name, 0, IFNAMSIZ);
3411 bond->proc_entry = NULL;
3412 }
3413}
3414
3415/* Create the bonding directory under /proc/net, if doesn't exist yet.
3416 * Caller must hold rtnl_lock.
3417 */
3418static void bond_create_proc_dir(void)
3419{
3420 int len = strlen(DRV_NAME);
3421
457c4cbc 3422 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3423 bond_proc_dir = bond_proc_dir->next) {
3424 if ((bond_proc_dir->namelen == len) &&
3425 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3426 break;
3427 }
3428 }
3429
3430 if (!bond_proc_dir) {
457c4cbc 3431 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3432 if (bond_proc_dir) {
3433 bond_proc_dir->owner = THIS_MODULE;
3434 } else {
3435 printk(KERN_WARNING DRV_NAME
3436 ": Warning: cannot create /proc/net/%s\n",
3437 DRV_NAME);
3438 }
3439 }
3440}
3441
3442/* Destroy the bonding directory under /proc/net, if empty.
3443 * Caller must hold rtnl_lock.
3444 */
3445static void bond_destroy_proc_dir(void)
3446{
3447 struct proc_dir_entry *de;
3448
3449 if (!bond_proc_dir) {
3450 return;
3451 }
3452
3453 /* verify that the /proc dir is empty */
3454 for (de = bond_proc_dir->subdir; de; de = de->next) {
3455 /* ignore . and .. */
3456 if (*(de->name) != '.') {
3457 break;
3458 }
3459 }
3460
3461 if (de) {
3462 if (bond_proc_dir->owner == THIS_MODULE) {
3463 bond_proc_dir->owner = NULL;
3464 }
3465 } else {
457c4cbc 3466 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3467 bond_proc_dir = NULL;
3468 }
3469}
3470#endif /* CONFIG_PROC_FS */
3471
3472/*-------------------------- netdev event handling --------------------------*/
3473
3474/*
3475 * Change device name
3476 */
3477static int bond_event_changename(struct bonding *bond)
3478{
3479#ifdef CONFIG_PROC_FS
3480 bond_remove_proc_entry(bond);
3481 bond_create_proc_entry(bond);
3482#endif
b76cdba9
MW		 3483 down_write(&(bonding_rwsem));
3484 bond_destroy_sysfs_entry(bond);
3485 bond_create_sysfs_entry(bond);
3486 up_write(&(bonding_rwsem));
1da177e4
LT		 3487 return NOTIFY_DONE;
3488}
3489
3490static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3491{
3492 struct bonding *event_bond = bond_dev->priv;
3493
3494 switch (event) {
3495 case NETDEV_CHANGENAME:
3496 return bond_event_changename(event_bond);
3497 case NETDEV_UNREGISTER:
3b96c858 3498 bond_release_all(event_bond->dev);
1da177e4
LT		 3499 break;
3500 default:
3501 break;
3502 }
3503
3504 return NOTIFY_DONE;
3505}
3506
3507static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3508{
3509 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3510 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3511
3512 switch (event) {
3513 case NETDEV_UNREGISTER:
3514 if (bond_dev) {
1284cd3a
JV		 3515 if (bond->setup_by_slave)
3516 bond_release_and_destroy(bond_dev, slave_dev);
3517 else
3518 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3519 }
3520 break;
3521 case NETDEV_CHANGE:
3522 /*
3523 * TODO: is this what we get if somebody
3524 * sets up a hierarchical bond, then rmmod's
3525 * one of the slave bonding devices?
3526 */
3527 break;
3528 case NETDEV_DOWN:
3529 /*
3530 * ... Or is it this?
3531 */
3532 break;
3533 case NETDEV_CHANGEMTU:
3534 /*
3535 * TODO: Should slaves be allowed to
3536 * independently alter their MTU? For
3537 * an active-backup bond, slaves need
3538 * not be the same type of device, so
3539 * MTUs may vary. For other modes,
3540 * slaves arguably should have the
3541 * same MTUs. To do this, we'd need to
3542 * take over the slave's change_mtu
3543 * function for the duration of their
3544 * servitude.
3545 */
3546 break;
3547 case NETDEV_CHANGENAME:
3548 /*
3549 * TODO: handle changing the primary's name
3550 */
3551 break;
8531c5ff
AK		 3552 case NETDEV_FEAT_CHANGE:
3553 bond_compute_features(bond);
3554 break;
1da177e4
LT		 3555 default:
3556 break;
3557 }
3558
3559 return NOTIFY_DONE;
3560}
3561
3562/*
3563 * bond_netdev_event: handle netdev notifier chain events.
3564 *
3565 * This function receives events for the netdev chain. The caller (an
e041c683 3566 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3567 * locks for us to safely manipulate the slave devices (RTNL lock,
3568 * dev_probe_lock).
3569 */
3570static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3571{
3572 struct net_device *event_dev = (struct net_device *)ptr;
3573
c346dca1 3574 if (dev_net(event_dev) != &init_net)
e9dc8653
EB		 3575 return NOTIFY_DONE;
3576
1da177e4
LT		 3577 dprintk("event_dev: %s, event: %lx\n",
3578 (event_dev ? event_dev->name : "None"),
3579 event);
3580
0b680e75
JV		 3581 if (!(event_dev->priv_flags & IFF_BONDING))
3582 return NOTIFY_DONE;
3583
1da177e4
LT		 3584 if (event_dev->flags & IFF_MASTER) {
3585 dprintk("IFF_MASTER\n");
3586 return bond_master_netdev_event(event, event_dev);
3587 }
3588
3589 if (event_dev->flags & IFF_SLAVE) {
3590 dprintk("IFF_SLAVE\n");
3591 return bond_slave_netdev_event(event, event_dev);
3592 }
3593
3594 return NOTIFY_DONE;
3595}
3596
c3ade5ca
JV		 3597/*
3598 * bond_inetaddr_event: handle inetaddr notifier chain events.
3599 *
3600 * We keep track of device IPs primarily to use as source addresses in
3601 * ARP monitor probes (rather than spewing out broadcasts all the time).
3602 *
3603 * We track one IP for the main device (if it has one), plus one per VLAN.
3604 */
3605static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3606{
3607 struct in_ifaddr *ifa = ptr;
3608 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
0883beca
PE		 3609 struct bonding *bond;
3610 struct vlan_entry *vlan;
c3ade5ca 3611
c346dca1 3612 if (dev_net(ifa->ifa_dev->dev) != &init_net)
6133fb1a
DL		 3613 return NOTIFY_DONE;
3614
0883beca 3615 list_for_each_entry(bond, &bond_dev_list, bond_list) {
c3ade5ca
JV		 3616 if (bond->dev == event_dev) {
3617 switch (event) {
3618 case NETDEV_UP:
3619 bond->master_ip = ifa->ifa_local;
3620 return NOTIFY_OK;
3621 case NETDEV_DOWN:
3622 bond->master_ip = bond_glean_dev_ip(bond->dev);
3623 return NOTIFY_OK;
3624 default:
3625 return NOTIFY_DONE;
3626 }
3627 }
3628
0883beca 3629 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 3630 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3631 if (vlan_dev == event_dev) {
3632 switch (event) {
3633 case NETDEV_UP:
3634 vlan->vlan_ip = ifa->ifa_local;
3635 return NOTIFY_OK;
3636 case NETDEV_DOWN:
3637 vlan->vlan_ip =
3638 bond_glean_dev_ip(vlan_dev);
3639 return NOTIFY_OK;
3640 default:
3641 return NOTIFY_DONE;
3642 }
3643 }
3644 }
3645 }
3646 return NOTIFY_DONE;
3647}
3648
1da177e4
LT		 3649static struct notifier_block bond_netdev_notifier = {
3650 .notifier_call = bond_netdev_event,
3651};
3652
c3ade5ca
JV		 3653static struct notifier_block bond_inetaddr_notifier = {
3654 .notifier_call = bond_inetaddr_event,
3655};
3656
1da177e4
LT		 3657/*-------------------------- Packet type handling ---------------------------*/
3658
3659/* register to receive lacpdus on a bond */
3660static void bond_register_lacpdu(struct bonding *bond)
3661{
3662 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3663
3664 /* initialize packet type */
3665 pk_type->type = PKT_TYPE_LACPDU;
3666 pk_type->dev = bond->dev;
3667 pk_type->func = bond_3ad_lacpdu_recv;
3668
3669 dev_add_pack(pk_type);
3670}
3671
3672/* unregister to receive lacpdus on a bond */
3673static void bond_unregister_lacpdu(struct bonding *bond)
3674{
3675 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3676}
3677
f5b2b966
JV		 3678void bond_register_arp(struct bonding *bond)
3679{
3680 struct packet_type *pt = &bond->arp_mon_pt;
3681
c4f283b1
JV		 3682 if (pt->type)
3683 return;
3684
f5b2b966 3685 pt->type = htons(ETH_P_ARP);
e245cb71 3686 pt->dev = bond->dev;
f5b2b966
JV		 3687 pt->func = bond_arp_rcv;
3688 dev_add_pack(pt);
3689}
3690
3691void bond_unregister_arp(struct bonding *bond)
3692{
c4f283b1
JV		 3693 struct packet_type *pt = &bond->arp_mon_pt;
3694
3695 dev_remove_pack(pt);
3696 pt->type = 0;
f5b2b966
JV		 3697}
3698
169a3e66
JV		 3699/*---------------------------- Hashing Policies -----------------------------*/
3700
6f6652be
JV		 3701/*
3702 * Hash for the output device based upon layer 2 and layer 3 data. If
3703 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3704 */
3705static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3706 struct net_device *bond_dev, int count)
3707{
3708 struct ethhdr *data = (struct ethhdr *)skb->data;
3709 struct iphdr *iph = ip_hdr(skb);
3710
f14c4e4e 3711 if (skb->protocol == htons(ETH_P_IP)) {
6f6652be
JV		 3712 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3713 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3714 }
3715
3716 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3717}
3718
169a3e66 3719/*
59c51591 3720 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3721 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3722 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3723 */
3724static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3725 struct net_device *bond_dev, int count)
3726{
3727 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3728 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3729 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3730 int layer4_xor = 0;
3731
f14c4e4e
BH		 3732 if (skb->protocol == htons(ETH_P_IP)) {
3733 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
169a3e66
JV		 3734 (iph->protocol == IPPROTO_TCP ||
3735 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3736 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3737 }
3738 return (layer4_xor ^
3739 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3740
3741 }
3742
3743 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3744}
3745
3746/*
3747 * Hash for the output device based upon layer 2 data
3748 */
3749static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3750 struct net_device *bond_dev, int count)
3751{
3752 struct ethhdr *data = (struct ethhdr *)skb->data;
3753
3754 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3755}
3756
1da177e4
LT		 3757/*-------------------------- Device entry points ----------------------------*/
3758
3759static int bond_open(struct net_device *bond_dev)
3760{
3761 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3762
3763 bond->kill_timers = 0;
3764
3765 if ((bond->params.mode == BOND_MODE_TLB) ||
3766 (bond->params.mode == BOND_MODE_ALB)) {
1da177e4
LT		 3767 /* bond_alb_initialize must be called before the timer
3768 * is started.
3769 */
3770 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3771 /* something went wrong - fail the open operation */
3772 return -1;
3773 }
3774
1b76b316
JV		 3775 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3776 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3777 }
3778
3779 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3780 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3781 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3782 }
3783
3784 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3785 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3786 INIT_DELAYED_WORK(&bond->arp_work,
3787 bond_activebackup_arp_mon);
3788 else
3789 INIT_DELAYED_WORK(&bond->arp_work,
3790 bond_loadbalance_arp_mon);
3791
3792 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3793 if (bond->params.arp_validate)
3794 bond_register_arp(bond);
1da177e4
LT		 3795 }
3796
3797 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3798 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3799 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3800 /* register to receive LACPDUs */
3801 bond_register_lacpdu(bond);
3802 }
3803
3804 return 0;
3805}
3806
3807static int bond_close(struct net_device *bond_dev)
3808{
3809 struct bonding *bond = bond_dev->priv;
3810
3811 if (bond->params.mode == BOND_MODE_8023AD) {
3812 /* Unregister the receive of LACPDUs */
3813 bond_unregister_lacpdu(bond);
3814 }
3815
f5b2b966
JV		 3816 if (bond->params.arp_validate)
3817 bond_unregister_arp(bond);
3818
1da177e4
LT		 3819 write_lock_bh(&bond->lock);
3820
b59f9f74 3821 bond->send_grat_arp = 0;
1da177e4
LT		 3822
3823 /* signal timers not to re-arm */
3824 bond->kill_timers = 1;
3825
3826 write_unlock_bh(&bond->lock);
3827
1da177e4 3828 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3829 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3830 }
3831
3832 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3833 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3834 }
3835
3836 switch (bond->params.mode) {
3837 case BOND_MODE_8023AD:
1b76b316 3838 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3839 break;
3840 case BOND_MODE_TLB:
3841 case BOND_MODE_ALB:
1b76b316 3842 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3843 break;
3844 default:
3845 break;
3846 }
3847
1da177e4
LT		 3848
3849 if ((bond->params.mode == BOND_MODE_TLB) ||
3850 (bond->params.mode == BOND_MODE_ALB)) {
3851 /* Must be called only after all
3852 * slaves have been released
3853 */
3854 bond_alb_deinitialize(bond);
3855 }
3856
3857 return 0;
3858}
3859
3860static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3861{
3862 struct bonding *bond = bond_dev->priv;
3863 struct net_device_stats *stats = &(bond->stats), *sstats;
2439f9eb 3864 struct net_device_stats local_stats;
1da177e4
LT		 3865 struct slave *slave;
3866 int i;
3867
2439f9eb 3868 memset(&local_stats, 0, sizeof(struct net_device_stats));
1da177e4
LT		 3869
3870 read_lock_bh(&bond->lock);
3871
3872 bond_for_each_slave(bond, slave, i) {
c45d286e 3873 sstats = slave->dev->get_stats(slave->dev);
2439f9eb
AG		 3874 local_stats.rx_packets += sstats->rx_packets;
3875 local_stats.rx_bytes += sstats->rx_bytes;
3876 local_stats.rx_errors += sstats->rx_errors;
3877 local_stats.rx_dropped += sstats->rx_dropped;
3878
3879 local_stats.tx_packets += sstats->tx_packets;
3880 local_stats.tx_bytes += sstats->tx_bytes;
3881 local_stats.tx_errors += sstats->tx_errors;
3882 local_stats.tx_dropped += sstats->tx_dropped;
3883
3884 local_stats.multicast += sstats->multicast;
3885 local_stats.collisions += sstats->collisions;
3886
3887 local_stats.rx_length_errors += sstats->rx_length_errors;
3888 local_stats.rx_over_errors += sstats->rx_over_errors;
3889 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3890 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3891 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3892 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3893
3894 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3895 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3896 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3897 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3898 local_stats.tx_window_errors += sstats->tx_window_errors;
3899 }
3900
3901 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
1da177e4
LT		 3902
3903 read_unlock_bh(&bond->lock);
3904
3905 return stats;
3906}
3907
3908static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3909{
3910 struct net_device *slave_dev = NULL;
3911 struct ifbond k_binfo;
3912 struct ifbond __user *u_binfo = NULL;
3913 struct ifslave k_sinfo;
3914 struct ifslave __user *u_sinfo = NULL;
3915 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3916 int res = 0;
3917
3918 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3919 bond_dev->name, cmd);
3920
3921 switch (cmd) {
1da177e4
LT		 3922 case SIOCGMIIPHY:
3923 mii = if_mii(ifr);
3924 if (!mii) {
3925 return -EINVAL;
3926 }
3927 mii->phy_id = 0;
3928 /* Fall Through */
3929 case SIOCGMIIREG:
3930 /*
3931 * We do this again just in case we were called by SIOCGMIIREG
3932 * instead of SIOCGMIIPHY.
3933 */
3934 mii = if_mii(ifr);
3935 if (!mii) {
3936 return -EINVAL;
3937 }
3938
3939 if (mii->reg_num == 1) {
3940 struct bonding *bond = bond_dev->priv;
3941 mii->val_out = 0;
6603a6f2 3942 read_lock(&bond->lock);
1da177e4 3943 read_lock(&bond->curr_slave_lock);
4e140079 3944 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3945 mii->val_out = BMSR_LSTATUS;
3946 }
3947 read_unlock(&bond->curr_slave_lock);
6603a6f2 3948 read_unlock(&bond->lock);
1da177e4
LT		 3949 }
3950
3951 return 0;
3952 case BOND_INFO_QUERY_OLD:
3953 case SIOCBONDINFOQUERY:
3954 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3955
3956 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3957 return -EFAULT;
3958 }
3959
3960 res = bond_info_query(bond_dev, &k_binfo);
3961 if (res == 0) {
3962 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3963 return -EFAULT;
3964 }
3965 }
3966
3967 return res;
3968 case BOND_SLAVE_INFO_QUERY_OLD:
3969 case SIOCBONDSLAVEINFOQUERY:
3970 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3971
3972 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3973 return -EFAULT;
3974 }
3975
3976 res = bond_slave_info_query(bond_dev, &k_sinfo);
3977 if (res == 0) {
3978 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3979 return -EFAULT;
3980 }
3981 }
3982
3983 return res;
3984 default:
3985 /* Go on */
3986 break;
3987 }
3988
3989 if (!capable(CAP_NET_ADMIN)) {
3990 return -EPERM;
3991 }
3992
b76cdba9 3993 down_write(&(bonding_rwsem));
881d966b 3994 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3995
3996 dprintk("slave_dev=%p: \n", slave_dev);
3997
3998 if (!slave_dev) {
3999 res = -ENODEV;
4000 } else {
4001 dprintk("slave_dev->name=%s: \n", slave_dev->name);
4002 switch (cmd) {
4003 case BOND_ENSLAVE_OLD:
4004 case SIOCBONDENSLAVE:
4005 res = bond_enslave(bond_dev, slave_dev);
4006 break;
4007 case BOND_RELEASE_OLD:
4008 case SIOCBONDRELEASE:
4009 res = bond_release(bond_dev, slave_dev);
4010 break;
4011 case BOND_SETHWADDR_OLD:
4012 case SIOCBONDSETHWADDR:
4013 res = bond_sethwaddr(bond_dev, slave_dev);
4014 break;
4015 case BOND_CHANGE_ACTIVE_OLD:
4016 case SIOCBONDCHANGEACTIVE:
4017 res = bond_ioctl_change_active(bond_dev, slave_dev);
4018 break;
4019 default:
4020 res = -EOPNOTSUPP;
4021 }
4022
4023 dev_put(slave_dev);
4024 }
4025
b76cdba9 4026 up_write(&(bonding_rwsem));
1da177e4
LT		 4027 return res;
4028}
4029
4030static void bond_set_multicast_list(struct net_device *bond_dev)
4031{
4032 struct bonding *bond = bond_dev->priv;
4033 struct dev_mc_list *dmi;
4034
1da177e4
LT		 4035 /*
4036 * Do promisc before checking multicast_mode
4037 */
4038 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
7e1a1ac1
WC		 4039 /*
4040 * FIXME: Need to handle the error when one of the multi-slaves
4041 * encounters error.
4042 */
1da177e4
LT		 4043 bond_set_promiscuity(bond, 1);
4044 }
4045
4046 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
4047 bond_set_promiscuity(bond, -1);
4048 }
4049
4050 /* set allmulti flag to slaves */
4051 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
7e1a1ac1
WC		 4052 /*
4053 * FIXME: Need to handle the error when one of the multi-slaves
4054 * encounters error.
4055 */
1da177e4
LT		 4056 bond_set_allmulti(bond, 1);
4057 }
4058
4059 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
4060 bond_set_allmulti(bond, -1);
4061 }
4062
80ee5ad2
JV		 4063 read_lock(&bond->lock);
4064
1da177e4
LT		 4065 bond->flags = bond_dev->flags;
4066
4067 /* looking for addresses to add to slaves' mc list */
4068 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4069 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
4070 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4071 }
4072 }
4073
4074 /* looking for addresses to delete from slaves' list */
4075 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4076 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
4077 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4078 }
4079 }
4080
4081 /* save master's multicast list */
4082 bond_mc_list_destroy(bond);
4083 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4084
80ee5ad2 4085 read_unlock(&bond->lock);
1da177e4
LT		 4086}
4087
4088/*
4089 * Change the MTU of all of a master's slaves to match the master
4090 */
4091static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4092{
4093 struct bonding *bond = bond_dev->priv;
4094 struct slave *slave, *stop_at;
4095 int res = 0;
4096 int i;
4097
4098 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
4099 (bond_dev ? bond_dev->name : "None"), new_mtu);
4100
4101 /* Can't hold bond->lock with bh disabled here since
4102 * some base drivers panic. On the other hand we can't
4103 * hold bond->lock without bh disabled because we'll
4104 * deadlock. The only solution is to rely on the fact
4105 * that we're under rtnl_lock here, and the slaves
4106 * list won't change. This doesn't solve the problem
4107 * of setting the slave's MTU while it is
4108 * transmitting, but the assumption is that the base
4109 * driver can handle that.
4110 *
4111 * TODO: figure out a way to safely iterate the slaves
4112 * list, but without holding a lock around the actual
4113 * call to the base driver.
4114 */
4115
4116 bond_for_each_slave(bond, slave, i) {
4117 dprintk("s %p s->p %p c_m %p\n", slave,
4118 slave->prev, slave->dev->change_mtu);
e944ef79 4119
1da177e4
LT		 4120 res = dev_set_mtu(slave->dev, new_mtu);
4121
4122 if (res) {
4123 /* If we failed to set the slave's mtu to the new value
4124 * we must abort the operation even in ACTIVE_BACKUP
4125 * mode, because if we allow the backup slaves to have
4126 * different mtu values than the active slave we'll
4127 * need to change their mtu when doing a failover. That
4128 * means changing their mtu from timer context, which
4129 * is probably not a good idea.
4130 */
4131 dprintk("err %d %s\n", res, slave->dev->name);
4132 goto unwind;
4133 }
4134 }
4135
4136 bond_dev->mtu = new_mtu;
4137
4138 return 0;
4139
4140unwind:
4141 /* unwind from head to the slave that failed */
4142 stop_at = slave;
4143 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4144 int tmp_res;
4145
4146 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4147 if (tmp_res) {
4148 dprintk("unwind err %d dev %s\n", tmp_res,
4149 slave->dev->name);
4150 }
4151 }
4152
4153 return res;
4154}
4155
4156/*
4157 * Change HW address
4158 *
4159 * Note that many devices must be down to change the HW address, and
4160 * downing the master releases all slaves. We can make bonds full of
4161 * bonding devices to test this, however.
4162 */
4163static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4164{
4165 struct bonding *bond = bond_dev->priv;
4166 struct sockaddr *sa = addr, tmp_sa;
4167 struct slave *slave, *stop_at;
4168 int res = 0;
4169 int i;
4170
4171 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4172
dd957c57 4173 /*
3915c1e8
JV		 4174 * If fail_over_mac is set to active, do nothing and return
4175 * success. Returning an error causes ifenslave to fail.
dd957c57 4176 */
3915c1e8 4177 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
dd957c57 4178 return 0;
2ab82852 4179
1da177e4
LT		 4180 if (!is_valid_ether_addr(sa->sa_data)) {
4181 return -EADDRNOTAVAIL;
4182 }
4183
4184 /* Can't hold bond->lock with bh disabled here since
4185 * some base drivers panic. On the other hand we can't
4186 * hold bond->lock without bh disabled because we'll
4187 * deadlock. The only solution is to rely on the fact
4188 * that we're under rtnl_lock here, and the slaves
4189 * list won't change. This doesn't solve the problem
4190 * of setting the slave's hw address while it is
4191 * transmitting, but the assumption is that the base
4192 * driver can handle that.
4193 *
4194 * TODO: figure out a way to safely iterate the slaves
4195 * list, but without holding a lock around the actual
4196 * call to the base driver.
4197 */
4198
4199 bond_for_each_slave(bond, slave, i) {
4200 dprintk("slave %p %s\n", slave, slave->dev->name);
4201
4202 if (slave->dev->set_mac_address == NULL) {
4203 res = -EOPNOTSUPP;
4204 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4205 goto unwind;
4206 }
4207
4208 res = dev_set_mac_address(slave->dev, addr);
4209 if (res) {
4210 /* TODO: consider downing the slave
4211 * and retry ?
4212 * User should expect communications
4213 * breakage anyway until ARP finish
4214 * updating, so...
4215 */
4216 dprintk("err %d %s\n", res, slave->dev->name);
4217 goto unwind;
4218 }
4219 }
4220
4221 /* success */
4222 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4223 return 0;
4224
4225unwind:
4226 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4227 tmp_sa.sa_family = bond_dev->type;
4228
4229 /* unwind from head to the slave that failed */
4230 stop_at = slave;
4231 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4232 int tmp_res;
4233
4234 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4235 if (tmp_res) {
4236 dprintk("unwind err %d dev %s\n", tmp_res,
4237 slave->dev->name);
4238 }
4239 }
4240
4241 return res;
4242}
4243
4244static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4245{
4246 struct bonding *bond = bond_dev->priv;
4247 struct slave *slave, *start_at;
cf5f9044 4248 int i, slave_no, res = 1;
1da177e4
LT		 4249
4250 read_lock(&bond->lock);
4251
4252 if (!BOND_IS_OK(bond)) {
4253 goto out;
4254 }
4255
cf5f9044
JV		 4256 /*
4257 * Concurrent TX may collide on rr_tx_counter; we accept that
4258 * as being rare enough not to justify using an atomic op here
4259 */
4260 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4261
cf5f9044
JV		 4262 bond_for_each_slave(bond, slave, i) {
4263 slave_no--;
4264 if (slave_no < 0) {
4265 break;
4266 }
1da177e4
LT		 4267 }
4268
cf5f9044 4269 start_at = slave;
1da177e4
LT		 4270 bond_for_each_slave_from(bond, slave, i, start_at) {
4271 if (IS_UP(slave->dev) &&
4272 (slave->link == BOND_LINK_UP) &&
4273 (slave->state == BOND_STATE_ACTIVE)) {
4274 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4275 break;
4276 }
4277 }
4278
1da177e4
LT		 4279out:
4280 if (res) {
4281 /* no suitable interface, frame not sent */
4282 dev_kfree_skb(skb);
4283 }
4284 read_unlock(&bond->lock);
4285 return 0;
4286}
4287
075897ce 4288
1da177e4
LT		 4289/*
4290 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4291 * the bond has a usable interface.
4292 */
4293static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4294{
4295 struct bonding *bond = bond_dev->priv;
4296 int res = 1;
4297
1da177e4
LT		 4298 read_lock(&bond->lock);
4299 read_lock(&bond->curr_slave_lock);
4300
4301 if (!BOND_IS_OK(bond)) {
4302 goto out;
4303 }
4304
075897ce
JL		 4305 if (!bond->curr_active_slave)
4306 goto out;
4307
075897ce
JL		 4308 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4309
1da177e4
LT		 4310out:
4311 if (res) {
4312 /* no suitable interface, frame not sent */
4313 dev_kfree_skb(skb);
4314 }
4315 read_unlock(&bond->curr_slave_lock);
4316 read_unlock(&bond->lock);
4317 return 0;
4318}
4319
4320/*
169a3e66
JV		 4321 * In bond_xmit_xor() , we determine the output device by using a pre-
4322 * determined xmit_hash_policy(), If the selected device is not enabled,
4323 * find the next active slave.
1da177e4
LT		 4324 */
4325static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4326{
4327 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4328 struct slave *slave, *start_at;
4329 int slave_no;
4330 int i;
4331 int res = 1;
4332
4333 read_lock(&bond->lock);
4334
4335 if (!BOND_IS_OK(bond)) {
4336 goto out;
4337 }
4338
169a3e66 4339 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4340
4341 bond_for_each_slave(bond, slave, i) {
4342 slave_no--;
4343 if (slave_no < 0) {
4344 break;
4345 }
4346 }
4347
4348 start_at = slave;
4349
4350 bond_for_each_slave_from(bond, slave, i, start_at) {
4351 if (IS_UP(slave->dev) &&
4352 (slave->link == BOND_LINK_UP) &&
4353 (slave->state == BOND_STATE_ACTIVE)) {
4354 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4355 break;
4356 }
4357 }
4358
4359out:
4360 if (res) {
4361 /* no suitable interface, frame not sent */
4362 dev_kfree_skb(skb);
4363 }
4364 read_unlock(&bond->lock);
4365 return 0;
4366}
4367
4368/*
4369 * in broadcast mode, we send everything to all usable interfaces.
4370 */
4371static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4372{
4373 struct bonding *bond = bond_dev->priv;
4374 struct slave *slave, *start_at;
4375 struct net_device *tx_dev = NULL;
4376 int i;
4377 int res = 1;
4378
4379 read_lock(&bond->lock);
4380
4381 if (!BOND_IS_OK(bond)) {
4382 goto out;
4383 }
4384
4385 read_lock(&bond->curr_slave_lock);
4386 start_at = bond->curr_active_slave;
4387 read_unlock(&bond->curr_slave_lock);
4388
4389 if (!start_at) {
4390 goto out;
4391 }
4392
4393 bond_for_each_slave_from(bond, slave, i, start_at) {
4394 if (IS_UP(slave->dev) &&
4395 (slave->link == BOND_LINK_UP) &&
4396 (slave->state == BOND_STATE_ACTIVE)) {
4397 if (tx_dev) {
4398 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4399 if (!skb2) {
4400 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4401 ": %s: Error: bond_xmit_broadcast(): "
4402 "skb_clone() failed\n",
4403 bond_dev->name);
1da177e4
LT		 4404 continue;
4405 }
4406
4407 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4408 if (res) {
4409 dev_kfree_skb(skb2);
4410 continue;
4411 }
4412 }
4413 tx_dev = slave->dev;
4414 }
4415 }
4416
4417 if (tx_dev) {
4418 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4419 }
4420
4421out:
4422 if (res) {
4423 /* no suitable interface, frame not sent */
4424 dev_kfree_skb(skb);
4425 }
4426 /* frame sent to all suitable interfaces */
4427 read_unlock(&bond->lock);
4428 return 0;
4429}
4430
4431/*------------------------- Device initialization ---------------------------*/
4432
6f6652be
JV		 4433static void bond_set_xmit_hash_policy(struct bonding *bond)
4434{
4435 switch (bond->params.xmit_policy) {
4436 case BOND_XMIT_POLICY_LAYER23:
4437 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4438 break;
4439 case BOND_XMIT_POLICY_LAYER34:
4440 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4441 break;
4442 case BOND_XMIT_POLICY_LAYER2:
4443 default:
4444 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4445 break;
4446 }
4447}
4448
1da177e4
LT		 4449/*
4450 * set bond mode specific net device operations
4451 */
a77b5325 4452void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4453{
169a3e66
JV		 4454 struct net_device *bond_dev = bond->dev;
4455
1da177e4
LT		 4456 switch (mode) {
4457 case BOND_MODE_ROUNDROBIN:
4458 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4459 break;
4460 case BOND_MODE_ACTIVEBACKUP:
4461 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4462 break;
4463 case BOND_MODE_XOR:
4464 bond_dev->hard_start_xmit = bond_xmit_xor;
6f6652be 4465 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4466 break;
4467 case BOND_MODE_BROADCAST:
4468 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4469 break;
4470 case BOND_MODE_8023AD:
8f903c70 4471 bond_set_master_3ad_flags(bond);
1da177e4 4472 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
6f6652be 4473 bond_set_xmit_hash_policy(bond);
1da177e4 4474 break;
1da177e4 4475 case BOND_MODE_ALB:
8f903c70
JV		 4476 bond_set_master_alb_flags(bond);
4477 /* FALLTHRU */
4478 case BOND_MODE_TLB:
1da177e4
LT		 4479 bond_dev->hard_start_xmit = bond_alb_xmit;
4480 bond_dev->set_mac_address = bond_alb_set_mac_address;
4481 break;
4482 default:
4483 /* Should never happen, mode already checked */
4484 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4485 ": %s: Error: Unknown bonding mode %d\n",
4486 bond_dev->name,
1da177e4
LT		 4487 mode);
4488 break;
4489 }
4490}
4491
217df670
JV		 4492static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4493 struct ethtool_drvinfo *drvinfo)
4494{
4495 strncpy(drvinfo->driver, DRV_NAME, 32);
4496 strncpy(drvinfo->version, DRV_VERSION, 32);
4497 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4498}
4499
7282d491 4500static const struct ethtool_ops bond_ethtool_ops = {
217df670 4501 .get_drvinfo = bond_ethtool_get_drvinfo,
fa53ebac
SH		 4502 .get_link = ethtool_op_get_link,
4503 .get_tx_csum = ethtool_op_get_tx_csum,
4504 .get_sg = ethtool_op_get_sg,
4505 .get_tso = ethtool_op_get_tso,
4506 .get_ufo = ethtool_op_get_ufo,
4507 .get_flags = ethtool_op_get_flags,
8531c5ff
AK		 4508};
4509
1da177e4
LT		 4510/*
4511 * Does not allocate but creates a /proc entry.
4512 * Allowed to fail.
4513 */
3c535952 4514static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4515{
4516 struct bonding *bond = bond_dev->priv;
4517
4518 dprintk("Begin bond_init for %s\n", bond_dev->name);
4519
4520 /* initialize rwlocks */
4521 rwlock_init(&bond->lock);
4522 rwlock_init(&bond->curr_slave_lock);
4523
4524 bond->params = *params; /* copy params struct */
4525
1b76b316
JV		 4526 bond->wq = create_singlethread_workqueue(bond_dev->name);
4527 if (!bond->wq)
4528 return -ENOMEM;
4529
1da177e4
LT		 4530 /* Initialize pointers */
4531 bond->first_slave = NULL;
4532 bond->curr_active_slave = NULL;
4533 bond->current_arp_slave = NULL;
4534 bond->primary_slave = NULL;
4535 bond->dev = bond_dev;
1053f62c 4536 bond->send_grat_arp = 0;
d90a162a 4537 bond->setup_by_slave = 0;
1da177e4
LT		 4538 INIT_LIST_HEAD(&bond->vlan_list);
4539
4540 /* Initialize the device entry points */
4541 bond_dev->open = bond_open;
4542 bond_dev->stop = bond_close;
4543 bond_dev->get_stats = bond_get_stats;
4544 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4545 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4546 bond_dev->set_multicast_list = bond_set_multicast_list;
4547 bond_dev->change_mtu = bond_change_mtu;
4548 bond_dev->set_mac_address = bond_set_mac_address;
3a1521b7 4549 bond_dev->validate_addr = NULL;
1da177e4 4550
169a3e66 4551 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4552
4553 bond_dev->destructor = free_netdev;
4554
4555 /* Initialize the device options */
4556 bond_dev->tx_queue_len = 0;
4557 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4558 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4559
4560 /* At first, we block adding VLANs. That's the only way to
4561 * prevent problems that occur when adding VLANs over an
4562 * empty bond. The block will be removed once non-challenged
4563 * slaves are enslaved.
4564 */
4565 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4566
932ff279 4567 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4568 * transmitting */
4569 bond_dev->features |= NETIF_F_LLTX;
4570
4571 /* By default, we declare the bond to be fully
4572 * VLAN hardware accelerated capable. Special
4573 * care is taken in the various xmit functions
4574 * when there are slaves that are not hw accel
4575 * capable
4576 */
4577 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4578 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4579 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4580 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4581 NETIF_F_HW_VLAN_RX |
4582 NETIF_F_HW_VLAN_FILTER);
4583
4584#ifdef CONFIG_PROC_FS
4585 bond_create_proc_entry(bond);
4586#endif
1da177e4
LT		 4587 list_add_tail(&bond->bond_list, &bond_dev_list);
4588
4589 return 0;
4590}
4591
4592/* De-initialize device specific data.
4593 * Caller must hold rtnl_lock.
4594 */
c50b85d0 4595static void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4596{
4597 struct bonding *bond = bond_dev->priv;
4598
4599 list_del(&bond->bond_list);
4600
4601#ifdef CONFIG_PROC_FS
4602 bond_remove_proc_entry(bond);
4603#endif
4604}
4605
fdaea7a9
JV		 4606static void bond_work_cancel_all(struct bonding *bond)
4607{
4608 write_lock_bh(&bond->lock);
4609 bond->kill_timers = 1;
4610 write_unlock_bh(&bond->lock);
4611
4612 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4613 cancel_delayed_work(&bond->mii_work);
4614
4615 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4616 cancel_delayed_work(&bond->arp_work);
4617
4618 if (bond->params.mode == BOND_MODE_ALB &&
4619 delayed_work_pending(&bond->alb_work))
4620 cancel_delayed_work(&bond->alb_work);
4621
4622 if (bond->params.mode == BOND_MODE_8023AD &&
4623 delayed_work_pending(&bond->ad_work))
4624 cancel_delayed_work(&bond->ad_work);
4625}
4626
1da177e4
LT		 4627/* Unregister and free all bond devices.
4628 * Caller must hold rtnl_lock.
4629 */
4630static void bond_free_all(void)
4631{
4632 struct bonding *bond, *nxt;
4633
4634 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4635 struct net_device *bond_dev = bond->dev;
4636
fdaea7a9 4637 bond_work_cancel_all(bond);
b9e40857 4638 netif_addr_lock_bh(bond_dev);
70298705 4639 bond_mc_list_destroy(bond);
b9e40857 4640 netif_addr_unlock_bh(bond_dev);
70298705 4641 /* Release the bonded slaves */
4642 bond_release_all(bond_dev);
92b41daa 4643 bond_destroy(bond);
1da177e4
LT		 4644 }
4645
4646#ifdef CONFIG_PROC_FS
4647 bond_destroy_proc_dir();
4648#endif
4649}
4650
4651/*------------------------- Module initialization ---------------------------*/
4652
4653/*
4654 * Convert string input module parms. Accept either the
ece95f7f
JV		 4655 * number of the mode or its string name. A bit complicated because
4656 * some mode names are substrings of other names, and calls from sysfs
4657 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4658 */
ece95f7f 4659int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
1da177e4 4660{
ece95f7f 4661 int mode = -1, i, rv;
a42e534f 4662 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
ece95f7f 4663
a42e534f
JV		 4664 for (p = (char *)buf; *p; p++)
4665 if (!(isdigit(*p) || isspace(*p)))
4666 break;
4667
4668 if (*p)
ece95f7f 4669 rv = sscanf(buf, "%20s", modestr);
a42e534f
JV		 4670 else
4671 rv = sscanf(buf, "%d", &mode);
4672
4673 if (!rv)
4674 return -1;
1da177e4
LT		 4675
4676 for (i = 0; tbl[i].modename; i++) {
ece95f7f
JV		 4677 if (mode == tbl[i].mode)
4678 return tbl[i].mode;
4679 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4680 return tbl[i].mode;
1da177e4
LT		 4681 }
4682
4683 return -1;
4684}
4685
4686static int bond_check_params(struct bond_params *params)
4687{
3915c1e8 4688 int arp_validate_value, fail_over_mac_value;
f5b2b966 4689
1da177e4
LT		 4690 /*
4691 * Convert string parameters.
4692 */
4693 if (mode) {
4694 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4695 if (bond_mode == -1) {
4696 printk(KERN_ERR DRV_NAME
4697 ": Error: Invalid bonding mode \"%s\"\n",
4698 mode == NULL ? "NULL" : mode);
4699 return -EINVAL;
4700 }
4701 }
4702
169a3e66
JV		 4703 if (xmit_hash_policy) {
4704 if ((bond_mode != BOND_MODE_XOR) &&
4705 (bond_mode != BOND_MODE_8023AD)) {
4706 printk(KERN_INFO DRV_NAME
4707 ": xor_mode param is irrelevant in mode %s\n",
4708 bond_mode_name(bond_mode));
4709 } else {
4710 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4711 xmit_hashtype_tbl);
4712 if (xmit_hashtype == -1) {
4713 printk(KERN_ERR DRV_NAME
4714 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4715 xmit_hash_policy == NULL ? "NULL" :
4716 xmit_hash_policy);
4717 return -EINVAL;
4718 }
4719 }
4720 }
4721
1da177e4
LT		 4722 if (lacp_rate) {
4723 if (bond_mode != BOND_MODE_8023AD) {
4724 printk(KERN_INFO DRV_NAME
4725 ": lacp_rate param is irrelevant in mode %s\n",
4726 bond_mode_name(bond_mode));
4727 } else {
4728 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4729 if (lacp_fast == -1) {
4730 printk(KERN_ERR DRV_NAME
4731 ": Error: Invalid lacp rate \"%s\"\n",
4732 lacp_rate == NULL ? "NULL" : lacp_rate);
4733 return -EINVAL;
4734 }
4735 }
4736 }
4737
b8a9787e 4738 if (max_bonds < 0 || max_bonds > INT_MAX) {
1da177e4
LT		 4739 printk(KERN_WARNING DRV_NAME
4740 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4741 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
b8a9787e 4742 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT		 4743 max_bonds = BOND_DEFAULT_MAX_BONDS;
4744 }
4745
4746 if (miimon < 0) {
4747 printk(KERN_WARNING DRV_NAME
4748 ": Warning: miimon module parameter (%d), "
4749 "not in range 0-%d, so it was reset to %d\n",
4750 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4751 miimon = BOND_LINK_MON_INTERV;
4752 }
4753
4754 if (updelay < 0) {
4755 printk(KERN_WARNING DRV_NAME
4756 ": Warning: updelay module parameter (%d), "
4757 "not in range 0-%d, so it was reset to 0\n",
4758 updelay, INT_MAX);
4759 updelay = 0;
4760 }
4761
4762 if (downdelay < 0) {
4763 printk(KERN_WARNING DRV_NAME
4764 ": Warning: downdelay module parameter (%d), "
4765 "not in range 0-%d, so it was reset to 0\n",
4766 downdelay, INT_MAX);
4767 downdelay = 0;
4768 }
4769
4770 if ((use_carrier != 0) && (use_carrier != 1)) {
4771 printk(KERN_WARNING DRV_NAME
4772 ": Warning: use_carrier module parameter (%d), "
4773 "not of valid value (0/1), so it was set to 1\n",
4774 use_carrier);
4775 use_carrier = 1;
4776 }
4777
7893b249
MS		 4778 if (num_grat_arp < 0 || num_grat_arp > 255) {
4779 printk(KERN_WARNING DRV_NAME
4780 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4781 "was reset to 1 \n", num_grat_arp);
4782 num_grat_arp = 1;
4783 }
4784
1da177e4
LT		 4785 /* reset values for 802.3ad */
4786 if (bond_mode == BOND_MODE_8023AD) {
4787 if (!miimon) {
4788 printk(KERN_WARNING DRV_NAME
4789 ": Warning: miimon must be specified, "
4790 "otherwise bonding will not detect link "
4791 "failure, speed and duplex which are "
4792 "essential for 802.3ad operation\n");
4793 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4794 miimon = 100;
4795 }
4796 }
4797
4798 /* reset values for TLB/ALB */
4799 if ((bond_mode == BOND_MODE_TLB) ||
4800 (bond_mode == BOND_MODE_ALB)) {
4801 if (!miimon) {
4802 printk(KERN_WARNING DRV_NAME
4803 ": Warning: miimon must be specified, "
4804 "otherwise bonding will not detect link "
4805 "failure and link speed which are essential "
4806 "for TLB/ALB load balancing\n");
4807 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4808 miimon = 100;
4809 }
4810 }
4811
4812 if (bond_mode == BOND_MODE_ALB) {
4813 printk(KERN_NOTICE DRV_NAME
4814 ": In ALB mode you might experience client "
4815 "disconnections upon reconnection of a link if the "
4816 "bonding module updelay parameter (%d msec) is "
4817 "incompatible with the forwarding delay time of the "
4818 "switch\n",
4819 updelay);
4820 }
4821
4822 if (!miimon) {
4823 if (updelay || downdelay) {
4824 /* just warn the user the up/down delay will have
4825 * no effect since miimon is zero...
4826 */
4827 printk(KERN_WARNING DRV_NAME
4828 ": Warning: miimon module parameter not set "
4829 "and updelay (%d) or downdelay (%d) module "
4830 "parameter is set; updelay and downdelay have "
4831 "no effect unless miimon is set\n",
4832 updelay, downdelay);
4833 }
4834 } else {
4835 /* don't allow arp monitoring */
4836 if (arp_interval) {
4837 printk(KERN_WARNING DRV_NAME
4838 ": Warning: miimon (%d) and arp_interval (%d) "
4839 "can't be used simultaneously, disabling ARP "
4840 "monitoring\n",
4841 miimon, arp_interval);
4842 arp_interval = 0;
4843 }
4844
4845 if ((updelay % miimon) != 0) {
4846 printk(KERN_WARNING DRV_NAME
4847 ": Warning: updelay (%d) is not a multiple "
4848 "of miimon (%d), updelay rounded to %d ms\n",
4849 updelay, miimon, (updelay / miimon) * miimon);
4850 }
4851
4852 updelay /= miimon;
4853
4854 if ((downdelay % miimon) != 0) {
4855 printk(KERN_WARNING DRV_NAME
4856 ": Warning: downdelay (%d) is not a multiple "
4857 "of miimon (%d), downdelay rounded to %d ms\n",
4858 downdelay, miimon,
4859 (downdelay / miimon) * miimon);
4860 }
4861
4862 downdelay /= miimon;
4863 }
4864
4865 if (arp_interval < 0) {
4866 printk(KERN_WARNING DRV_NAME
4867 ": Warning: arp_interval module parameter (%d) "
4868 ", not in range 0-%d, so it was reset to %d\n",
4869 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4870 arp_interval = BOND_LINK_ARP_INTERV;
4871 }
4872
4873 for (arp_ip_count = 0;
4874 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4875 arp_ip_count++) {
4876 /* not complete check, but should be good enough to
4877 catch mistakes */
4878 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4879 printk(KERN_WARNING DRV_NAME
4880 ": Warning: bad arp_ip_target module parameter "
4881 "(%s), ARP monitoring will not be performed\n",
4882 arp_ip_target[arp_ip_count]);
4883 arp_interval = 0;
4884 } else {
d3bb52b0 4885 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4886 arp_target[arp_ip_count] = ip;
4887 }
4888 }
4889
4890 if (arp_interval && !arp_ip_count) {
4891 /* don't allow arping if no arp_ip_target given... */
4892 printk(KERN_WARNING DRV_NAME
4893 ": Warning: arp_interval module parameter (%d) "
4894 "specified without providing an arp_ip_target "
4895 "parameter, arp_interval was reset to 0\n",
4896 arp_interval);
4897 arp_interval = 0;
4898 }
4899
f5b2b966
JV		 4900 if (arp_validate) {
4901 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4902 printk(KERN_ERR DRV_NAME
4903 ": arp_validate only supported in active-backup mode\n");
4904 return -EINVAL;
4905 }
4906 if (!arp_interval) {
4907 printk(KERN_ERR DRV_NAME
4908 ": arp_validate requires arp_interval\n");
4909 return -EINVAL;
4910 }
4911
4912 arp_validate_value = bond_parse_parm(arp_validate,
4913 arp_validate_tbl);
4914 if (arp_validate_value == -1) {
4915 printk(KERN_ERR DRV_NAME
4916 ": Error: invalid arp_validate \"%s\"\n",
4917 arp_validate == NULL ? "NULL" : arp_validate);
4918 return -EINVAL;
4919 }
4920 } else
4921 arp_validate_value = 0;
4922
1da177e4
LT		 4923 if (miimon) {
4924 printk(KERN_INFO DRV_NAME
4925 ": MII link monitoring set to %d ms\n",
4926 miimon);
4927 } else if (arp_interval) {
4928 int i;
4929
4930 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4931 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4932 arp_interval,
4933 arp_validate_tbl[arp_validate_value].modename,
4934 arp_ip_count);
1da177e4
LT		 4935
4936 for (i = 0; i < arp_ip_count; i++)
4937 printk (" %s", arp_ip_target[i]);
4938
4939 printk("\n");
4940
b8a9787e 4941 } else if (max_bonds) {
1da177e4
LT		 4942 /* miimon and arp_interval not set, we need one so things
4943 * work as expected, see bonding.txt for details
4944 */
4945 printk(KERN_WARNING DRV_NAME
4946 ": Warning: either miimon or arp_interval and "
4947 "arp_ip_target module parameters must be specified, "
4948 "otherwise bonding will not detect link failures! see "
4949 "bonding.txt for details.\n");
4950 }
4951
4952 if (primary && !USES_PRIMARY(bond_mode)) {
4953 /* currently, using a primary only makes sense
4954 * in active backup, TLB or ALB modes
4955 */
4956 printk(KERN_WARNING DRV_NAME
4957 ": Warning: %s primary device specified but has no "
4958 "effect in %s mode\n",
4959 primary, bond_mode_name(bond_mode));
4960 primary = NULL;
4961 }
4962
3915c1e8
JV		 4963 if (fail_over_mac) {
4964 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4965 fail_over_mac_tbl);
4966 if (fail_over_mac_value == -1) {
4967 printk(KERN_ERR DRV_NAME
4968 ": Error: invalid fail_over_mac \"%s\"\n",
4969 arp_validate == NULL ? "NULL" : arp_validate);
4970 return -EINVAL;
4971 }
4972
4973 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4974 printk(KERN_WARNING DRV_NAME
4975 ": Warning: fail_over_mac only affects "
4976 "active-backup mode.\n");
4977 } else {
4978 fail_over_mac_value = BOND_FOM_NONE;
4979 }
dd957c57 4980
1da177e4
LT		 4981 /* fill params struct with the proper values */
4982 params->mode = bond_mode;
169a3e66 4983 params->xmit_policy = xmit_hashtype;
1da177e4 4984 params->miimon = miimon;
7893b249 4985 params->num_grat_arp = num_grat_arp;
1da177e4 4986 params->arp_interval = arp_interval;
f5b2b966 4987 params->arp_validate = arp_validate_value;
1da177e4
LT		 4988 params->updelay = updelay;
4989 params->downdelay = downdelay;
4990 params->use_carrier = use_carrier;
4991 params->lacp_fast = lacp_fast;
4992 params->primary[0] = 0;
3915c1e8 4993 params->fail_over_mac = fail_over_mac_value;
1da177e4
LT		 4994
4995 if (primary) {
4996 strncpy(params->primary, primary, IFNAMSIZ);
4997 params->primary[IFNAMSIZ - 1] = 0;
4998 }
4999
5000 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5001
5002 return 0;
5003}
5004
0daa2303 5005static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 5006static struct lock_class_key bonding_netdev_addr_lock_key;
0daa2303 5007
e8a0464c
DM		 5008static void bond_set_lockdep_class_one(struct net_device *dev,
5009 struct netdev_queue *txq,
5010 void *_unused)
c773e847
DM		 5011{
5012 lockdep_set_class(&txq->_xmit_lock,
5013 &bonding_netdev_xmit_lock_key);
5014}
5015
5016static void bond_set_lockdep_class(struct net_device *dev)
5017{
cf508b12
DM		 5018 lockdep_set_class(&dev->addr_list_lock,
5019 &bonding_netdev_addr_lock_key);
e8a0464c 5020 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
c773e847
DM		 5021}
5022
dfe60397 5023/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 5024 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 5025 * Caller must NOT hold rtnl_lock; we need to release it here before we
5026 * set up our sysfs entries.
5027 */
0dd646fe 5028int bond_create(char *name, struct bond_params *params)
dfe60397
MW		 5029{
5030 struct net_device *bond_dev;
0883beca 5031 struct bonding *bond;
dfe60397
MW		 5032 int res;
5033
5034 rtnl_lock();
027ea041
JV		 5035 down_write(&bonding_rwsem);
5036
5037 /* Check to see if the bond already exists. */
4fe4763c 5038 if (name) {
0883beca 5039 list_for_each_entry(bond, &bond_dev_list, bond_list)
4fe4763c
JV		 5040 if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
5041 printk(KERN_ERR DRV_NAME
027ea041 5042 ": cannot add bond %s; it already exists\n",
4fe4763c
JV		 5043 name);
5044 res = -EPERM;
5045 goto out_rtnl;
5046 }
5047 }
027ea041 5048
e4b91c48
JV		 5049 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5050 ether_setup);
dfe60397
MW		 5051 if (!bond_dev) {
5052 printk(KERN_ERR DRV_NAME
5053 ": %s: eek! can't alloc netdev!\n",
5054 name);
5055 res = -ENOMEM;
5056 goto out_rtnl;
5057 }
5058
e4b91c48
JV		 5059 if (!name) {
5060 res = dev_alloc_name(bond_dev, "bond%d");
5061 if (res < 0)
5062 goto out_netdev;
5063 }
5064
dfe60397
MW		 5065 /* bond_init() must be called after dev_alloc_name() (for the
5066 * /proc files), but before register_netdevice(), because we
5067 * need to set function pointers.
5068 */
5069
5070 res = bond_init(bond_dev, params);
5071 if (res < 0) {
5072 goto out_netdev;
5073 }
5074
dfe60397
MW		 5075 res = register_netdevice(bond_dev);
5076 if (res < 0) {
5077 goto out_bond;
5078 }
0daa2303 5079
c773e847 5080 bond_set_lockdep_class(bond_dev);
0daa2303 5081
ff59c456
JV		 5082 netif_carrier_off(bond_dev);
5083
027ea041 5084 up_write(&bonding_rwsem);
dfe60397 5085 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 5086 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 5087 if (res < 0) {
5088 rtnl_lock();
027ea041 5089 down_write(&bonding_rwsem);
822973ba
PE		 5090 bond_deinit(bond_dev);
5091 unregister_netdevice(bond_dev);
5092 goto out_rtnl;
09c89279
JV		 5093 }
5094
5095 return 0;
5096
dfe60397
MW		 5097out_bond:
5098 bond_deinit(bond_dev);
5099out_netdev:
5100 free_netdev(bond_dev);
5101out_rtnl:
027ea041 5102 up_write(&bonding_rwsem);
dfe60397 5103 rtnl_unlock();
dfe60397
MW		 5104 return res;
5105}
5106
1da177e4
LT		 5107static int __init bonding_init(void)
5108{
1da177e4
LT		 5109 int i;
5110 int res;
0883beca 5111 struct bonding *bond;
1da177e4
LT		 5112
5113 printk(KERN_INFO "%s", version);
5114
dfe60397 5115 res = bond_check_params(&bonding_defaults);
1da177e4 5116 if (res) {
dfe60397 5117 goto out;
1da177e4
LT		 5118 }
5119
1da177e4
LT		 5120#ifdef CONFIG_PROC_FS
5121 bond_create_proc_dir();
5122#endif
027ea041
JV		 5123
5124 init_rwsem(&bonding_rwsem);
5125
1da177e4 5126 for (i = 0; i < max_bonds; i++) {
0dd646fe 5127 res = bond_create(NULL, &bonding_defaults);
dfe60397
MW		 5128 if (res)
5129 goto err;
1da177e4
LT		 5130 }
5131
b76cdba9
MW		 5132 res = bond_create_sysfs();
5133 if (res)
5134 goto err;
5135
1da177e4 5136 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5137 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 5138
dfe60397
MW		 5139 goto out;
5140err:
0883beca 5141 list_for_each_entry(bond, &bond_dev_list, bond_list) {
1b76b316
JV		 5142 bond_work_cancel_all(bond);
5143 destroy_workqueue(bond->wq);
5144 }
5145
ae68c398
PE		 5146 bond_destroy_sysfs();
5147
40abc270 5148 rtnl_lock();
1da177e4 5149 bond_free_all();
1da177e4 5150 rtnl_unlock();
dfe60397 5151out:
1da177e4 5152 return res;
dfe60397 5153
1da177e4
LT		 5154}
5155
5156static void __exit bonding_exit(void)
5157{
5158 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5159 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 5160
ae68c398
PE		 5161 bond_destroy_sysfs();
5162
1da177e4
LT		 5163 rtnl_lock();
5164 bond_free_all();
5165 rtnl_unlock();
5166}
5167
5168module_init(bonding_init);
5169module_exit(bonding_exit);
5170MODULE_LICENSE("GPL");
5171MODULE_VERSION(DRV_VERSION);
5172MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5173MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5174MODULE_SUPPORTED_DEVICE("most ethernet devices");
5175
5176/*
5177 * Local variables:
5178 * c-indent-level: 8
5179 * c-basic-offset: 8
5180 * tab-width: 8
5181 * End:
5182 */
5183
Clone of davem's net-next-2.6 tree