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sctp: Fix to handle SHUTDOWN in SHUTDOWN_RECEIVED state
[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
HX		 1343 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
1344 features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA |
1345 NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1346
54ef3137 1347 bond_for_each_slave(bond, slave, i) {
7f353bf2
HX		 1348 features = netdev_compute_features(features,
1349 slave->dev->features);
54ef3137
JV		 1350 if (slave->dev->hard_header_len > max_hard_header_len)
1351 max_hard_header_len = slave->dev->hard_header_len;
1352 }
8531c5ff 1353
7f353bf2 1354 features |= (bond_dev->features & BOND_VLAN_FEATURES);
8531c5ff 1355 bond_dev->features = features;
54ef3137 1356 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1357
1358 return 0;
1359}
1360
872254dd
MS		 1361
1362static void bond_setup_by_slave(struct net_device *bond_dev,
1363 struct net_device *slave_dev)
1364{
d90a162a
MS		 1365 struct bonding *bond = bond_dev->priv;
1366
872254dd 1367 bond_dev->neigh_setup = slave_dev->neigh_setup;
1284cd3a 1368 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1369
1370 bond_dev->type = slave_dev->type;
1371 bond_dev->hard_header_len = slave_dev->hard_header_len;
1372 bond_dev->addr_len = slave_dev->addr_len;
1373
1374 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1375 slave_dev->addr_len);
d90a162a 1376 bond->setup_by_slave = 1;
872254dd
MS		 1377}
1378
1da177e4 1379/* enslave device <slave> to bond device <master> */
a77b5325 1380int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1381{
1382 struct bonding *bond = bond_dev->priv;
1383 struct slave *new_slave = NULL;
1384 struct dev_mc_list *dmi;
1385 struct sockaddr addr;
1386 int link_reporting;
1387 int old_features = bond_dev->features;
1388 int res = 0;
1389
552709d5 1390 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
1391 slave_dev->do_ioctl == NULL) {
1da177e4 1392 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1393 ": %s: Warning: no link monitoring support for %s\n",
1394 bond_dev->name, slave_dev->name);
1da177e4
LT		 1395 }
1396
1397 /* bond must be initialized by bond_open() before enslaving */
1398 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1399 printk(KERN_WARNING DRV_NAME
1400 " %s: master_dev is not up in bond_enslave\n",
1401 bond_dev->name);
1da177e4
LT		 1402 }
1403
1404 /* already enslaved */
1405 if (slave_dev->flags & IFF_SLAVE) {
1406 dprintk("Error, Device was already enslaved\n");
1407 return -EBUSY;
1408 }
1409
1410 /* vlan challenged mutual exclusion */
1411 /* no need to lock since we're protected by rtnl_lock */
1412 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
1413 dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1414 if (!list_empty(&bond->vlan_list)) {
1415 printk(KERN_ERR DRV_NAME
4e0952c7 1416 ": %s: Error: cannot enslave VLAN "
1da177e4 1417 "challenged slave %s on VLAN enabled "
4e0952c7 1418 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1419 bond_dev->name);
1420 return -EPERM;
1421 } else {
1422 printk(KERN_WARNING DRV_NAME
4e0952c7 1423 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1424 "slave %s. Adding VLANs will be blocked as "
1425 "long as %s is part of bond %s\n",
4e0952c7 1426 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1427 bond_dev->name);
1428 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1429 }
1430 } else {
1431 dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1432 if (bond->slave_cnt == 0) {
1433 /* First slave, and it is not VLAN challenged,
1434 * so remove the block of adding VLANs over the bond.
1435 */
1436 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1437 }
1438 }
1439
217df670
JV		 1440 /*
1441 * Old ifenslave binaries are no longer supported. These can
1442 * be identified with moderate accurary by the state of the slave:
1443 * the current ifenslave will set the interface down prior to
1444 * enslaving it; the old ifenslave will not.
1445 */
1446 if ((slave_dev->flags & IFF_UP)) {
1447 printk(KERN_ERR DRV_NAME ": %s is up. "
1448 "This may be due to an out of date ifenslave.\n",
1449 slave_dev->name);
1450 res = -EPERM;
1451 goto err_undo_flags;
1452 }
1da177e4 1453
872254dd
MS		 1454 /* set bonding device ether type by slave - bonding netdevices are
1455 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1456 * there is a need to override some of the type dependent attribs/funcs.
1457 *
1458 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1459 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1460 */
1461 if (bond->slave_cnt == 0) {
1462 if (slave_dev->type != ARPHRD_ETHER)
1463 bond_setup_by_slave(bond_dev, slave_dev);
1464 } else if (bond_dev->type != slave_dev->type) {
1465 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1466 "from other slaves (%d), can not enslave it.\n",
1467 slave_dev->name,
1468 slave_dev->type, bond_dev->type);
1469 res = -EINVAL;
1470 goto err_undo_flags;
1471 }
1472
217df670 1473 if (slave_dev->set_mac_address == NULL) {
2ab82852
MS		 1474 if (bond->slave_cnt == 0) {
1475 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1476 ": %s: Warning: The first slave device "
1477 "specified does not support setting the MAC "
3915c1e8 1478 "address. Setting fail_over_mac to active.",
dd957c57 1479 bond_dev->name);
3915c1e8
JV		 1480 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1481 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852 1482 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1483 ": %s: Error: The slave device specified "
1484 "does not support setting the MAC address, "
3915c1e8 1485 "but fail_over_mac is not set to active.\n"
2ab82852
MS		 1486 , bond_dev->name);
1487 res = -EOPNOTSUPP;
1488 goto err_undo_flags;
1489 }
1da177e4
LT		 1490 }
1491
243cb4e5 1492 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1493 if (!new_slave) {
1494 res = -ENOMEM;
1495 goto err_undo_flags;
1496 }
1497
1da177e4
LT		 1498 /* save slave's original flags before calling
1499 * netdev_set_master and dev_open
1500 */
1501 new_slave->original_flags = slave_dev->flags;
1502
217df670
JV		 1503 /*
1504 * Save slave's original ("permanent") mac address for modes
1505 * that need it, and for restoring it upon release, and then
1506 * set it to the master's address
1507 */
1508 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1509
dd957c57 1510 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1511 /*
1512 * Set slave to master's mac address. The application already
1513 * set the master's mac address to that of the first slave
1514 */
1515 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1516 addr.sa_family = slave_dev->type;
1517 res = dev_set_mac_address(slave_dev, &addr);
1518 if (res) {
1519 dprintk("Error %d calling set_mac_address\n", res);
1520 goto err_free;
1521 }
217df670 1522 }
1da177e4 1523
c2edacf8
JV		 1524 res = netdev_set_master(slave_dev, bond_dev);
1525 if (res) {
1526 dprintk("Error %d calling netdev_set_master\n", res);
569f0c4d 1527 goto err_restore_mac;
c2edacf8 1528 }
217df670
JV		 1529 /* open the slave since the application closed it */
1530 res = dev_open(slave_dev);
1531 if (res) {
1532 dprintk("Openning slave %s failed\n", slave_dev->name);
569f0c4d 1533 goto err_unset_master;
1da177e4
LT		 1534 }
1535
1da177e4 1536 new_slave->dev = slave_dev;
0b680e75 1537 slave_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 1538
1539 if ((bond->params.mode == BOND_MODE_TLB) ||
1540 (bond->params.mode == BOND_MODE_ALB)) {
1541 /* bond_alb_init_slave() must be called before all other stages since
1542 * it might fail and we do not want to have to undo everything
1543 */
1544 res = bond_alb_init_slave(bond, new_slave);
1545 if (res) {
569f0c4d 1546 goto err_close;
1da177e4
LT		 1547 }
1548 }
1549
1550 /* If the mode USES_PRIMARY, then the new slave gets the
1551 * master's promisc (and mc) settings only if it becomes the
1552 * curr_active_slave, and that is taken care of later when calling
1553 * bond_change_active()
1554 */
1555 if (!USES_PRIMARY(bond->params.mode)) {
1556 /* set promiscuity level to new slave */
1557 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC		 1558 res = dev_set_promiscuity(slave_dev, 1);
1559 if (res)
1560 goto err_close;
1da177e4
LT		 1561 }
1562
1563 /* set allmulti level to new slave */
1564 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC		 1565 res = dev_set_allmulti(slave_dev, 1);
1566 if (res)
1567 goto err_close;
1da177e4
LT		 1568 }
1569
b9e40857 1570 netif_addr_lock_bh(bond_dev);
1da177e4
LT		 1571 /* upload master's mc_list to new slave */
1572 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1573 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1574 }
b9e40857 1575 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1576 }
1577
1578 if (bond->params.mode == BOND_MODE_8023AD) {
1579 /* add lacpdu mc addr to mc list */
1580 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1581
1582 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1583 }
1584
1585 bond_add_vlans_on_slave(bond, slave_dev);
1586
1587 write_lock_bh(&bond->lock);
1588
1589 bond_attach_slave(bond, new_slave);
1590
1591 new_slave->delay = 0;
1592 new_slave->link_failure_count = 0;
1593
8531c5ff
AK		 1594 bond_compute_features(bond);
1595
3915c1e8
JV		 1596 write_unlock_bh(&bond->lock);
1597
1598 read_lock(&bond->lock);
1599
f5b2b966
JV		 1600 new_slave->last_arp_rx = jiffies;
1601
1da177e4
LT		 1602 if (bond->params.miimon && !bond->params.use_carrier) {
1603 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1604
1605 if ((link_reporting == -1) && !bond->params.arp_interval) {
1606 /*
1607 * miimon is set but a bonded network driver
1608 * does not support ETHTOOL/MII and
1609 * arp_interval is not set. Note: if
1610 * use_carrier is enabled, we will never go
1611 * here (because netif_carrier is always
1612 * supported); thus, we don't need to change
1613 * the messages for netif_carrier.
1614 */
1615 printk(KERN_WARNING DRV_NAME
4e0952c7 1616 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1617 "available for interface %s, and "
1618 "arp_interval/arp_ip_target module parameters "
1619 "not specified, thus bonding will not detect "
1620 "link failures! see bonding.txt for details.\n",
4e0952c7 1621 bond_dev->name, slave_dev->name);
1da177e4
LT		 1622 } else if (link_reporting == -1) {
1623 /* unable get link status using mii/ethtool */
1624 printk(KERN_WARNING DRV_NAME
4e0952c7 1625 ": %s: Warning: can't get link status from "
1da177e4
LT		 1626 "interface %s; the network driver associated "
1627 "with this interface does not support MII or "
1628 "ETHTOOL link status reporting, thus miimon "
1629 "has no effect on this interface.\n",
4e0952c7 1630 bond_dev->name, slave_dev->name);
1da177e4
LT		 1631 }
1632 }
1633
1634 /* check for initial state */
1635 if (!bond->params.miimon ||
1636 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1637 if (bond->params.updelay) {
1638 dprintk("Initial state of slave_dev is "
1639 "BOND_LINK_BACK\n");
1640 new_slave->link = BOND_LINK_BACK;
1641 new_slave->delay = bond->params.updelay;
1642 } else {
1643 dprintk("Initial state of slave_dev is "
1644 "BOND_LINK_UP\n");
1645 new_slave->link = BOND_LINK_UP;
1646 }
1647 new_slave->jiffies = jiffies;
1648 } else {
1649 dprintk("Initial state of slave_dev is "
1650 "BOND_LINK_DOWN\n");
1651 new_slave->link = BOND_LINK_DOWN;
1652 }
1653
1654 if (bond_update_speed_duplex(new_slave) &&
1655 (new_slave->link != BOND_LINK_DOWN)) {
1656 printk(KERN_WARNING DRV_NAME
4e0952c7 1657 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1658 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1659 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1660
1661 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1662 printk(KERN_WARNING DRV_NAME
1663 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1664 "support in base driver for proper aggregator "
4e0952c7 1665 "selection.\n", bond_dev->name);
1da177e4
LT		 1666 }
1667 }
1668
1669 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1670 /* if there is a primary slave, remember it */
1671 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1672 bond->primary_slave = new_slave;
1673 }
1674 }
1675
3915c1e8
JV		 1676 write_lock_bh(&bond->curr_slave_lock);
1677
1da177e4
LT		 1678 switch (bond->params.mode) {
1679 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1680 bond_set_slave_inactive_flags(new_slave);
1681 bond_select_active_slave(bond);
1da177e4
LT		 1682 break;
1683 case BOND_MODE_8023AD:
1684 /* in 802.3ad mode, the internal mechanism
1685 * will activate the slaves in the selected
1686 * aggregator
1687 */
1688 bond_set_slave_inactive_flags(new_slave);
1689 /* if this is the first slave */
1690 if (bond->slave_cnt == 1) {
1691 SLAVE_AD_INFO(new_slave).id = 1;
1692 /* Initialize AD with the number of times that the AD timer is called in 1 second
1693 * can be called only after the mac address of the bond is set
1694 */
1695 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1696 bond->params.lacp_fast);
1697 } else {
1698 SLAVE_AD_INFO(new_slave).id =
1699 SLAVE_AD_INFO(new_slave->prev).id + 1;
1700 }
1701
1702 bond_3ad_bind_slave(new_slave);
1703 break;
1704 case BOND_MODE_TLB:
1705 case BOND_MODE_ALB:
1706 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1707 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1708 break;
1709 default:
1710 dprintk("This slave is always active in trunk mode\n");
1711
1712 /* always active in trunk mode */
1713 new_slave->state = BOND_STATE_ACTIVE;
1714
1715 /* In trunking mode there is little meaning to curr_active_slave
1716 * anyway (it holds no special properties of the bond device),
1717 * so we can change it without calling change_active_interface()
1718 */
1719 if (!bond->curr_active_slave) {
1720 bond->curr_active_slave = new_slave;
1721 }
1722 break;
1723 } /* switch(bond_mode) */
1724
3915c1e8
JV		 1725 write_unlock_bh(&bond->curr_slave_lock);
1726
ff59c456
JV		 1727 bond_set_carrier(bond);
1728
3915c1e8 1729 read_unlock(&bond->lock);
1da177e4 1730
b76cdba9
MW		 1731 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1732 if (res)
569f0c4d 1733 goto err_close;
b76cdba9 1734
1da177e4
LT		 1735 printk(KERN_INFO DRV_NAME
1736 ": %s: enslaving %s as a%s interface with a%s link.\n",
1737 bond_dev->name, slave_dev->name,
1738 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1739 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1740
1741 /* enslave is successful */
1742 return 0;
1743
1744/* Undo stages on error */
1da177e4
LT		 1745err_close:
1746 dev_close(slave_dev);
1747
569f0c4d
JV		 1748err_unset_master:
1749 netdev_set_master(slave_dev, NULL);
1750
1da177e4 1751err_restore_mac:
dd957c57 1752 if (!bond->params.fail_over_mac) {
3915c1e8
JV		 1753 /* XXX TODO - fom follow mode needs to change master's
1754 * MAC if this slave's MAC is in use by the bond, or at
1755 * least print a warning.
1756 */
2ab82852
MS		 1757 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1758 addr.sa_family = slave_dev->type;
1759 dev_set_mac_address(slave_dev, &addr);
1760 }
1da177e4
LT		 1761
1762err_free:
1763 kfree(new_slave);
1764
1765err_undo_flags:
1766 bond_dev->features = old_features;
8531c5ff 1767
1da177e4
LT		 1768 return res;
1769}
1770
1771/*
1772 * Try to release the slave device <slave> from the bond device <master>
1773 * It is legal to access curr_active_slave without a lock because all the function
1774 * is write-locked.
1775 *
1776 * The rules for slave state should be:
1777 * for Active/Backup:
1778 * Active stays on all backups go down
1779 * for Bonded connections:
1780 * The first up interface should be left on and all others downed.
1781 */
a77b5325 1782int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4
LT		 1783{
1784 struct bonding *bond = bond_dev->priv;
1785 struct slave *slave, *oldcurrent;
1786 struct sockaddr addr;
1787 int mac_addr_differ;
0795af57 1788 DECLARE_MAC_BUF(mac);
1da177e4
LT		 1789
1790 /* slave is not a slave or master is not master of this slave */
1791 if (!(slave_dev->flags & IFF_SLAVE) ||
1792 (slave_dev->master != bond_dev)) {
1793 printk(KERN_ERR DRV_NAME
4e0952c7 1794 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1795 bond_dev->name, slave_dev->name);
1796 return -EINVAL;
1797 }
1798
1799 write_lock_bh(&bond->lock);
1800
1801 slave = bond_get_slave_by_dev(bond, slave_dev);
1802 if (!slave) {
1803 /* not a slave of this bond */
1804 printk(KERN_INFO DRV_NAME
1805 ": %s: %s not enslaved\n",
1806 bond_dev->name, slave_dev->name);
f5e2a7b2 1807 write_unlock_bh(&bond->lock);
1da177e4
LT		 1808 return -EINVAL;
1809 }
1810
3915c1e8
JV		 1811 if (!bond->params.fail_over_mac) {
1812 mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr,
1813 ETH_ALEN);
1814 if (!mac_addr_differ && (bond->slave_cnt > 1))
1815 printk(KERN_WARNING DRV_NAME
1816 ": %s: Warning: the permanent HWaddr of %s - "
1817 "%s - is still in use by %s. "
1818 "Set the HWaddr of %s to a different address "
1819 "to avoid conflicts.\n",
1820 bond_dev->name, slave_dev->name,
1821 print_mac(mac, slave->perm_hwaddr),
1822 bond_dev->name, slave_dev->name);
1da177e4
LT		 1823 }
1824
1825 /* Inform AD package of unbinding of slave. */
1826 if (bond->params.mode == BOND_MODE_8023AD) {
1827 /* must be called before the slave is
1828 * detached from the list
1829 */
1830 bond_3ad_unbind_slave(slave);
1831 }
1832
1833 printk(KERN_INFO DRV_NAME
1834 ": %s: releasing %s interface %s\n",
1835 bond_dev->name,
1836 (slave->state == BOND_STATE_ACTIVE)
1837 ? "active" : "backup",
1838 slave_dev->name);
1839
1840 oldcurrent = bond->curr_active_slave;
1841
1842 bond->current_arp_slave = NULL;
1843
1844 /* release the slave from its bond */
1845 bond_detach_slave(bond, slave);
1846
8531c5ff
AK		 1847 bond_compute_features(bond);
1848
1da177e4
LT		 1849 if (bond->primary_slave == slave) {
1850 bond->primary_slave = NULL;
1851 }
1852
1853 if (oldcurrent == slave) {
1854 bond_change_active_slave(bond, NULL);
1855 }
1856
1857 if ((bond->params.mode == BOND_MODE_TLB) ||
1858 (bond->params.mode == BOND_MODE_ALB)) {
1859 /* Must be called only after the slave has been
1860 * detached from the list and the curr_active_slave
1861 * has been cleared (if our_slave == old_current),
1862 * but before a new active slave is selected.
1863 */
2543331d 1864 write_unlock_bh(&bond->lock);
1da177e4 1865 bond_alb_deinit_slave(bond, slave);
2543331d 1866 write_lock_bh(&bond->lock);
1da177e4
LT		 1867 }
1868
059fe7a5
JV		 1869 if (oldcurrent == slave) {
1870 /*
1871 * Note that we hold RTNL over this sequence, so there
1872 * is no concern that another slave add/remove event
1873 * will interfere.
1874 */
1875 write_unlock_bh(&bond->lock);
1876 read_lock(&bond->lock);
1877 write_lock_bh(&bond->curr_slave_lock);
1878
1da177e4
LT		 1879 bond_select_active_slave(bond);
1880
059fe7a5
JV		 1881 write_unlock_bh(&bond->curr_slave_lock);
1882 read_unlock(&bond->lock);
1883 write_lock_bh(&bond->lock);
1884 }
1885
1da177e4 1886 if (bond->slave_cnt == 0) {
ff59c456
JV		 1887 bond_set_carrier(bond);
1888
1da177e4
LT		 1889 /* if the last slave was removed, zero the mac address
1890 * of the master so it will be set by the application
1891 * to the mac address of the first slave
1892 */
1893 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1894
1895 if (list_empty(&bond->vlan_list)) {
1896 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1897 } else {
1898 printk(KERN_WARNING DRV_NAME
4e0952c7 1899 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1900 "still has VLANs.\n",
4e0952c7 1901 bond_dev->name, bond_dev->name);
1da177e4 1902 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1903 ": %s: When re-adding slaves, make sure the bond's "
1904 "HW address matches its VLANs'.\n",
1905 bond_dev->name);
1da177e4
LT		 1906 }
1907 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1908 !bond_has_challenged_slaves(bond)) {
1909 printk(KERN_INFO DRV_NAME
4e0952c7 1910 ": %s: last VLAN challenged slave %s "
1da177e4 1911 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1912 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1913 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1914 }
1915
1916 write_unlock_bh(&bond->lock);
1917
b76cdba9
MW		 1918 /* must do this from outside any spinlocks */
1919 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1920
1da177e4
LT		 1921 bond_del_vlans_from_slave(bond, slave_dev);
1922
1923 /* If the mode USES_PRIMARY, then we should only remove its
1924 * promisc and mc settings if it was the curr_active_slave, but that was
1925 * already taken care of above when we detached the slave
1926 */
1927 if (!USES_PRIMARY(bond->params.mode)) {
1928 /* unset promiscuity level from slave */
1929 if (bond_dev->flags & IFF_PROMISC) {
1930 dev_set_promiscuity(slave_dev, -1);
1931 }
1932
1933 /* unset allmulti level from slave */
1934 if (bond_dev->flags & IFF_ALLMULTI) {
1935 dev_set_allmulti(slave_dev, -1);
1936 }
1937
1938 /* flush master's mc_list from slave */
b9e40857 1939 netif_addr_lock_bh(bond_dev);
1da177e4 1940 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 1941 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1942 }
1943
1944 netdev_set_master(slave_dev, NULL);
1945
1946 /* close slave before restoring its mac address */
1947 dev_close(slave_dev);
1948
3915c1e8 1949 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852
MS		 1950 /* restore original ("permanent") mac address */
1951 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1952 addr.sa_family = slave_dev->type;
1953 dev_set_mac_address(slave_dev, &addr);
1954 }
1da177e4 1955
8f903c70 1956 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1957 IFF_SLAVE_INACTIVE | IFF_BONDING |
1958 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1959
1960 kfree(slave);
1961
1962 return 0; /* deletion OK */
1963}
1964
d90a162a
MS		 1965/*
1966* Destroy a bonding device.
1967* Must be under rtnl_lock when this function is called.
1968*/
1969void bond_destroy(struct bonding *bond)
1970{
1971 bond_deinit(bond->dev);
1972 bond_destroy_sysfs_entry(bond);
8cbdeec6 1973 unregister_netdevice(bond->dev);
d90a162a
MS		 1974}
1975
1976/*
1977* First release a slave and than destroy the bond if no more slaves iare left.
1978* Must be under rtnl_lock when this function is called.
1979*/
1980int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1981{
1982 struct bonding *bond = bond_dev->priv;
1983 int ret;
1984
1985 ret = bond_release(bond_dev, slave_dev);
1986 if ((ret == 0) && (bond->slave_cnt == 0)) {
1987 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
1988 bond_dev->name, bond_dev->name);
1989 bond_destroy(bond);
1990 }
1991 return ret;
1992}
1993
1da177e4
LT		 1994/*
1995 * This function releases all slaves.
1996 */
1997static int bond_release_all(struct net_device *bond_dev)
1998{
1999 struct bonding *bond = bond_dev->priv;
2000 struct slave *slave;
2001 struct net_device *slave_dev;
2002 struct sockaddr addr;
2003
2004 write_lock_bh(&bond->lock);
2005
ff59c456
JV		 2006 netif_carrier_off(bond_dev);
2007
1da177e4
LT		 2008 if (bond->slave_cnt == 0) {
2009 goto out;
2010 }
2011
2012 bond->current_arp_slave = NULL;
2013 bond->primary_slave = NULL;
2014 bond_change_active_slave(bond, NULL);
2015
2016 while ((slave = bond->first_slave) != NULL) {
2017 /* Inform AD package of unbinding of slave
2018 * before slave is detached from the list.
2019 */
2020 if (bond->params.mode == BOND_MODE_8023AD) {
2021 bond_3ad_unbind_slave(slave);
2022 }
2023
2024 slave_dev = slave->dev;
2025 bond_detach_slave(bond, slave);
2026
2543331d
JV		 2027 /* now that the slave is detached, unlock and perform
2028 * all the undo steps that should not be called from
2029 * within a lock.
2030 */
2031 write_unlock_bh(&bond->lock);
2032
1da177e4
LT		 2033 if ((bond->params.mode == BOND_MODE_TLB) ||
2034 (bond->params.mode == BOND_MODE_ALB)) {
2035 /* must be called only after the slave
2036 * has been detached from the list
2037 */
2038 bond_alb_deinit_slave(bond, slave);
2039 }
2040
8531c5ff
AK		 2041 bond_compute_features(bond);
2042
b76cdba9 2043 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 2044 bond_del_vlans_from_slave(bond, slave_dev);
2045
2046 /* If the mode USES_PRIMARY, then we should only remove its
2047 * promisc and mc settings if it was the curr_active_slave, but that was
2048 * already taken care of above when we detached the slave
2049 */
2050 if (!USES_PRIMARY(bond->params.mode)) {
2051 /* unset promiscuity level from slave */
2052 if (bond_dev->flags & IFF_PROMISC) {
2053 dev_set_promiscuity(slave_dev, -1);
2054 }
2055
2056 /* unset allmulti level from slave */
2057 if (bond_dev->flags & IFF_ALLMULTI) {
2058 dev_set_allmulti(slave_dev, -1);
2059 }
2060
2061 /* flush master's mc_list from slave */
b9e40857 2062 netif_addr_lock_bh(bond_dev);
1da177e4 2063 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2064 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 2065 }
2066
2067 netdev_set_master(slave_dev, NULL);
2068
2069 /* close slave before restoring its mac address */
2070 dev_close(slave_dev);
2071
dd957c57 2072 if (!bond->params.fail_over_mac) {
2ab82852
MS		 2073 /* restore original ("permanent") mac address*/
2074 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2075 addr.sa_family = slave_dev->type;
2076 dev_set_mac_address(slave_dev, &addr);
2077 }
1da177e4 2078
8f903c70
JV		 2079 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2080 IFF_SLAVE_INACTIVE);
1da177e4
LT		 2081
2082 kfree(slave);
2083
2084 /* re-acquire the lock before getting the next slave */
2085 write_lock_bh(&bond->lock);
2086 }
2087
2088 /* zero the mac address of the master so it will be
2089 * set by the application to the mac address of the
2090 * first slave
2091 */
2092 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2093
2094 if (list_empty(&bond->vlan_list)) {
2095 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2096 } else {
2097 printk(KERN_WARNING DRV_NAME
4e0952c7 2098 ": %s: Warning: clearing HW address of %s while it "
1da177e4 2099 "still has VLANs.\n",
4e0952c7 2100 bond_dev->name, bond_dev->name);
1da177e4 2101 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 2102 ": %s: When re-adding slaves, make sure the bond's "
2103 "HW address matches its VLANs'.\n",
2104 bond_dev->name);
1da177e4
LT		 2105 }
2106
2107 printk(KERN_INFO DRV_NAME
2108 ": %s: released all slaves\n",
2109 bond_dev->name);
2110
2111out:
2112 write_unlock_bh(&bond->lock);
2113
2114 return 0;
2115}
2116
2117/*
2118 * This function changes the active slave to slave <slave_dev>.
2119 * It returns -EINVAL in the following cases.
2120 * - <slave_dev> is not found in the list.
2121 * - There is not active slave now.
2122 * - <slave_dev> is already active.
2123 * - The link state of <slave_dev> is not BOND_LINK_UP.
2124 * - <slave_dev> is not running.
2125 * In these cases, this fuction does nothing.
2126 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2127 */
2128static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2129{
2130 struct bonding *bond = bond_dev->priv;
2131 struct slave *old_active = NULL;
2132 struct slave *new_active = NULL;
2133 int res = 0;
2134
2135 if (!USES_PRIMARY(bond->params.mode)) {
2136 return -EINVAL;
2137 }
2138
2139 /* Verify that master_dev is indeed the master of slave_dev */
2140 if (!(slave_dev->flags & IFF_SLAVE) ||
2141 (slave_dev->master != bond_dev)) {
2142 return -EINVAL;
2143 }
2144
059fe7a5 2145 read_lock(&bond->lock);
1da177e4 2146
059fe7a5 2147 read_lock(&bond->curr_slave_lock);
1da177e4 2148 old_active = bond->curr_active_slave;
059fe7a5
JV		 2149 read_unlock(&bond->curr_slave_lock);
2150
1da177e4
LT		 2151 new_active = bond_get_slave_by_dev(bond, slave_dev);
2152
2153 /*
2154 * Changing to the current active: do nothing; return success.
2155 */
2156 if (new_active && (new_active == old_active)) {
059fe7a5 2157 read_unlock(&bond->lock);
1da177e4
LT		 2158 return 0;
2159 }
2160
2161 if ((new_active) &&
2162 (old_active) &&
2163 (new_active->link == BOND_LINK_UP) &&
2164 IS_UP(new_active->dev)) {
059fe7a5 2165 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2166 bond_change_active_slave(bond, new_active);
059fe7a5 2167 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2168 } else {
2169 res = -EINVAL;
2170 }
2171
059fe7a5 2172 read_unlock(&bond->lock);
1da177e4
LT		 2173
2174 return res;
2175}
2176
1da177e4
LT		 2177static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2178{
2179 struct bonding *bond = bond_dev->priv;
2180
2181 info->bond_mode = bond->params.mode;
2182 info->miimon = bond->params.miimon;
2183
6603a6f2 2184 read_lock(&bond->lock);
1da177e4 2185 info->num_slaves = bond->slave_cnt;
6603a6f2 2186 read_unlock(&bond->lock);
1da177e4
LT		 2187
2188 return 0;
2189}
2190
2191static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2192{
2193 struct bonding *bond = bond_dev->priv;
2194 struct slave *slave;
2195 int i, found = 0;
2196
2197 if (info->slave_id < 0) {
2198 return -ENODEV;
2199 }
2200
6603a6f2 2201 read_lock(&bond->lock);
1da177e4
LT		 2202
2203 bond_for_each_slave(bond, slave, i) {
2204 if (i == (int)info->slave_id) {
2205 found = 1;
2206 break;
2207 }
2208 }
2209
6603a6f2 2210 read_unlock(&bond->lock);
1da177e4
LT		 2211
2212 if (found) {
2213 strcpy(info->slave_name, slave->dev->name);
2214 info->link = slave->link;
2215 info->state = slave->state;
2216 info->link_failure_count = slave->link_failure_count;
2217 } else {
2218 return -ENODEV;
2219 }
2220
2221 return 0;
2222}
2223
2224/*-------------------------------- Monitoring -------------------------------*/
2225
1da177e4 2226
f0c76d61
JV		 2227static int bond_miimon_inspect(struct bonding *bond)
2228{
2229 struct slave *slave;
2230 int i, link_state, commit = 0;
1da177e4
LT		 2231
2232 bond_for_each_slave(bond, slave, i) {
f0c76d61 2233 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2234
f0c76d61 2235 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT		 2236
2237 switch (slave->link) {
f0c76d61
JV		 2238 case BOND_LINK_UP:
2239 if (link_state)
2240 continue;
1da177e4 2241
f0c76d61
JV		 2242 slave->link = BOND_LINK_FAIL;
2243 slave->delay = bond->params.downdelay;
2244 if (slave->delay) {
2245 printk(KERN_INFO DRV_NAME
2246 ": %s: link status down for %s"
2247 "interface %s, disabling it in %d ms.\n",
2248 bond->dev->name,
2249 (bond->params.mode ==
2250 BOND_MODE_ACTIVEBACKUP) ?
2251 ((slave->state == BOND_STATE_ACTIVE) ?
2252 "active " : "backup ") : "",
2253 slave->dev->name,
2254 bond->params.downdelay * bond->params.miimon);
1da177e4 2255 }
f0c76d61
JV		 2256 /*FALLTHRU*/
2257 case BOND_LINK_FAIL:
2258 if (link_state) {
2259 /*
2260 * recovered before downdelay expired
2261 */
2262 slave->link = BOND_LINK_UP;
1da177e4
LT		 2263 slave->jiffies = jiffies;
2264 printk(KERN_INFO DRV_NAME
2265 ": %s: link status up again after %d "
2266 "ms for interface %s.\n",
1b76b316 2267 bond->dev->name,
f0c76d61
JV		 2268 (bond->params.downdelay - slave->delay) *
2269 bond->params.miimon,
2270 slave->dev->name);
2271 continue;
1da177e4 2272 }
f0c76d61
JV		 2273
2274 if (slave->delay <= 0) {
2275 slave->new_link = BOND_LINK_DOWN;
2276 commit++;
2277 continue;
1da177e4 2278 }
1da177e4 2279
f0c76d61
JV		 2280 slave->delay--;
2281 break;
2282
2283 case BOND_LINK_DOWN:
2284 if (!link_state)
2285 continue;
2286
2287 slave->link = BOND_LINK_BACK;
2288 slave->delay = bond->params.updelay;
2289
2290 if (slave->delay) {
2291 printk(KERN_INFO DRV_NAME
2292 ": %s: link status up for "
2293 "interface %s, enabling it in %d ms.\n",
2294 bond->dev->name, slave->dev->name,
2295 bond->params.updelay *
2296 bond->params.miimon);
2297 }
2298 /*FALLTHRU*/
2299 case BOND_LINK_BACK:
2300 if (!link_state) {
2301 slave->link = BOND_LINK_DOWN;
1da177e4
LT		 2302 printk(KERN_INFO DRV_NAME
2303 ": %s: link status down again after %d "
2304 "ms for interface %s.\n",
1b76b316 2305 bond->dev->name,
f0c76d61
JV		 2306 (bond->params.updelay - slave->delay) *
2307 bond->params.miimon,
2308 slave->dev->name);
2309
2310 continue;
2311 }
2312
2313 if (slave->delay <= 0) {
2314 slave->new_link = BOND_LINK_UP;
2315 commit++;
2316 continue;
1da177e4 2317 }
f0c76d61
JV		 2318
2319 slave->delay--;
1da177e4 2320 break;
f0c76d61
JV		 2321 }
2322 }
1da177e4 2323
f0c76d61
JV		 2324 return commit;
2325}
1da177e4 2326
f0c76d61
JV		 2327static void bond_miimon_commit(struct bonding *bond)
2328{
2329 struct slave *slave;
2330 int i;
2331
2332 bond_for_each_slave(bond, slave, i) {
2333 switch (slave->new_link) {
2334 case BOND_LINK_NOCHANGE:
2335 continue;
1da177e4 2336
f0c76d61
JV		 2337 case BOND_LINK_UP:
2338 slave->link = BOND_LINK_UP;
2339 slave->jiffies = jiffies;
2340
2341 if (bond->params.mode == BOND_MODE_8023AD) {
2342 /* prevent it from being the active one */
2343 slave->state = BOND_STATE_BACKUP;
2344 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2345 /* make it immediately active */
2346 slave->state = BOND_STATE_ACTIVE;
2347 } else if (slave != bond->primary_slave) {
2348 /* prevent it from being the active one */
2349 slave->state = BOND_STATE_BACKUP;
1da177e4 2350 }
1da177e4 2351
f0c76d61
JV		 2352 printk(KERN_INFO DRV_NAME
2353 ": %s: link status definitely "
2354 "up for interface %s.\n",
2355 bond->dev->name, slave->dev->name);
1da177e4 2356
f0c76d61
JV		 2357 /* notify ad that the link status has changed */
2358 if (bond->params.mode == BOND_MODE_8023AD)
2359 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2360
f0c76d61
JV		 2361 if ((bond->params.mode == BOND_MODE_TLB) ||
2362 (bond->params.mode == BOND_MODE_ALB))
2363 bond_alb_handle_link_change(bond, slave,
2364 BOND_LINK_UP);
1da177e4 2365
f0c76d61
JV		 2366 if (!bond->curr_active_slave ||
2367 (slave == bond->primary_slave))
2368 goto do_failover;
1da177e4 2369
f0c76d61 2370 continue;
059fe7a5 2371
f0c76d61
JV		 2372 case BOND_LINK_DOWN:
2373 slave->link = BOND_LINK_DOWN;
1da177e4 2374
f0c76d61
JV		 2375 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2376 bond->params.mode == BOND_MODE_8023AD)
2377 bond_set_slave_inactive_flags(slave);
2378
2379 printk(KERN_INFO DRV_NAME
2380 ": %s: link status definitely down for "
2381 "interface %s, disabling it\n",
2382 bond->dev->name, slave->dev->name);
2383
2384 if (bond->params.mode == BOND_MODE_8023AD)
2385 bond_3ad_handle_link_change(slave,
2386 BOND_LINK_DOWN);
2387
2388 if (bond->params.mode == BOND_MODE_TLB ||
2389 bond->params.mode == BOND_MODE_ALB)
2390 bond_alb_handle_link_change(bond, slave,
2391 BOND_LINK_DOWN);
2392
2393 if (slave == bond->curr_active_slave)
2394 goto do_failover;
2395
2396 continue;
2397
2398 default:
2399 printk(KERN_ERR DRV_NAME
2400 ": %s: invalid new link %d on slave %s\n",
2401 bond->dev->name, slave->new_link,
2402 slave->dev->name);
2403 slave->new_link = BOND_LINK_NOCHANGE;
2404
2405 continue;
2406 }
2407
2408do_failover:
2409 ASSERT_RTNL();
2410 write_lock_bh(&bond->curr_slave_lock);
2411 bond_select_active_slave(bond);
2412 write_unlock_bh(&bond->curr_slave_lock);
2413 }
2414
2415 bond_set_carrier(bond);
1da177e4
LT		 2416}
2417
0b0eef66
JV		 2418/*
2419 * bond_mii_monitor
2420 *
2421 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV		 2422 * inspection, then (if inspection indicates something needs to be done)
2423 * an acquisition of appropriate locks followed by a commit phase to
2424 * implement whatever link state changes are indicated.
0b0eef66
JV		 2425 */
2426void bond_mii_monitor(struct work_struct *work)
2427{
2428 struct bonding *bond = container_of(work, struct bonding,
2429 mii_work.work);
0b0eef66
JV		 2430
2431 read_lock(&bond->lock);
f0c76d61
JV		 2432 if (bond->kill_timers)
2433 goto out;
2434
2435 if (bond->slave_cnt == 0)
2436 goto re_arm;
b59f9f74
JV		 2437
2438 if (bond->send_grat_arp) {
2439 read_lock(&bond->curr_slave_lock);
2440 bond_send_gratuitous_arp(bond);
2441 read_unlock(&bond->curr_slave_lock);
2442 }
2443
f0c76d61 2444 if (bond_miimon_inspect(bond)) {
0b0eef66
JV		 2445 read_unlock(&bond->lock);
2446 rtnl_lock();
2447 read_lock(&bond->lock);
f0c76d61
JV		 2448
2449 bond_miimon_commit(bond);
2450
5655662d
JV		 2451 read_unlock(&bond->lock);
2452 rtnl_unlock(); /* might sleep, hold no other locks */
2453 read_lock(&bond->lock);
0b0eef66
JV		 2454 }
2455
f0c76d61
JV		 2456re_arm:
2457 if (bond->params.miimon)
2458 queue_delayed_work(bond->wq, &bond->mii_work,
2459 msecs_to_jiffies(bond->params.miimon));
2460out:
0b0eef66 2461 read_unlock(&bond->lock);
0b0eef66 2462}
c3ade5ca 2463
d3bb52b0 2464static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2465{
2466 struct in_device *idev;
2467 struct in_ifaddr *ifa;
a144ea4b 2468 __be32 addr = 0;
c3ade5ca
JV		 2469
2470 if (!dev)
2471 return 0;
2472
2473 rcu_read_lock();
e5ed6399 2474 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2475 if (!idev)
2476 goto out;
2477
2478 ifa = idev->ifa_list;
2479 if (!ifa)
2480 goto out;
2481
2482 addr = ifa->ifa_local;
2483out:
2484 rcu_read_unlock();
2485 return addr;
2486}
2487
d3bb52b0 2488static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2489{
0883beca 2490 struct vlan_entry *vlan;
f5b2b966
JV		 2491
2492 if (ip == bond->master_ip)
2493 return 1;
2494
0883beca 2495 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f5b2b966
JV		 2496 if (ip == vlan->vlan_ip)
2497 return 1;
2498 }
2499
2500 return 0;
2501}
2502
c3ade5ca
JV		 2503/*
2504 * We go to the (large) trouble of VLAN tagging ARP frames because
2505 * switches in VLAN mode (especially if ports are configured as
2506 * "native" to a VLAN) might not pass non-tagged frames.
2507 */
d3bb52b0 2508static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2509{
2510 struct sk_buff *skb;
2511
2512 dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
2513 slave_dev->name, dest_ip, src_ip, vlan_id);
2514
2515 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2516 NULL, slave_dev->dev_addr, NULL);
2517
2518 if (!skb) {
2519 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2520 return;
2521 }
2522 if (vlan_id) {
2523 skb = vlan_put_tag(skb, vlan_id);
2524 if (!skb) {
2525 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2526 return;
2527 }
2528 }
2529 arp_xmit(skb);
2530}
2531
2532
1da177e4
LT		 2533static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2534{
c3ade5ca 2535 int i, vlan_id, rv;
d3bb52b0 2536 __be32 *targets = bond->params.arp_targets;
0883beca 2537 struct vlan_entry *vlan;
c3ade5ca
JV		 2538 struct net_device *vlan_dev;
2539 struct flowi fl;
2540 struct rtable *rt;
1da177e4 2541
6b780567
MW		 2542 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2543 if (!targets[i])
2544 continue;
c3ade5ca
JV		 2545 dprintk("basa: target %x\n", targets[i]);
2546 if (list_empty(&bond->vlan_list)) {
2547 dprintk("basa: empty vlan: arp_send\n");
2548 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2549 bond->master_ip, 0);
2550 continue;
2551 }
2552
2553 /*
2554 * If VLANs are configured, we do a route lookup to
2555 * determine which VLAN interface would be used, so we
2556 * can tag the ARP with the proper VLAN tag.
2557 */
2558 memset(&fl, 0, sizeof(fl));
2559 fl.fl4_dst = targets[i];
2560 fl.fl4_tos = RTO_ONLINK;
2561
f206351a 2562 rv = ip_route_output_key(&init_net, &rt, &fl);
c3ade5ca
JV		 2563 if (rv) {
2564 if (net_ratelimit()) {
2565 printk(KERN_WARNING DRV_NAME
2566 ": %s: no route to arp_ip_target %u.%u.%u.%u\n",
2567 bond->dev->name, NIPQUAD(fl.fl4_dst));
2568 }
2569 continue;
2570 }
2571
2572 /*
2573 * This target is not on a VLAN
2574 */
2575 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2576 ip_rt_put(rt);
c3ade5ca
JV		 2577 dprintk("basa: rtdev == bond->dev: arp_send\n");
2578 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2579 bond->master_ip, 0);
2580 continue;
2581 }
2582
2583 vlan_id = 0;
0883beca 2584 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2585 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2586 if (vlan_dev == rt->u.dst.dev) {
2587 vlan_id = vlan->vlan_id;
2588 dprintk("basa: vlan match on %s %d\n",
2589 vlan_dev->name, vlan_id);
2590 break;
2591 }
2592 }
2593
2594 if (vlan_id) {
ed4b9f80 2595 ip_rt_put(rt);
c3ade5ca
JV		 2596 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2597 vlan->vlan_ip, vlan_id);
2598 continue;
2599 }
2600
2601 if (net_ratelimit()) {
2602 printk(KERN_WARNING DRV_NAME
2603 ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n",
2604 bond->dev->name, NIPQUAD(fl.fl4_dst),
2605 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2606 }
ed4b9f80 2607 ip_rt_put(rt);
c3ade5ca
JV		 2608 }
2609}
2610
2611/*
2612 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2613 * for each VLAN above us.
b59f9f74
JV		 2614 *
2615 * Caller must hold curr_slave_lock for read or better
c3ade5ca
JV		 2616 */
2617static void bond_send_gratuitous_arp(struct bonding *bond)
2618{
2619 struct slave *slave = bond->curr_active_slave;
2620 struct vlan_entry *vlan;
2621 struct net_device *vlan_dev;
2622
2623 dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
2624 slave ? slave->dev->name : "NULL");
b59f9f74
JV		 2625
2626 if (!slave || !bond->send_grat_arp ||
2627 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
c3ade5ca
JV		 2628 return;
2629
b59f9f74
JV		 2630 bond->send_grat_arp--;
2631
c3ade5ca
JV		 2632 if (bond->master_ip) {
2633 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2634 bond->master_ip, 0);
c3ade5ca
JV		 2635 }
2636
2637 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2638 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2639 if (vlan->vlan_ip) {
2640 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2641 vlan->vlan_ip, vlan->vlan_id);
2642 }
1da177e4
LT		 2643 }
2644}
2645
d3bb52b0 2646static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2647{
2648 int i;
d3bb52b0 2649 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2650
2651 targets = bond->params.arp_targets;
2652 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
2653 dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] "
2654 "%u.%u.%u.%u bhti(tip) %d\n",
2655 NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]),
2656 bond_has_this_ip(bond, tip));
2657 if (sip == targets[i]) {
2658 if (bond_has_this_ip(bond, tip))
2659 slave->last_arp_rx = jiffies;
2660 return;
2661 }
2662 }
2663}
2664
2665static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2666{
2667 struct arphdr *arp;
2668 struct slave *slave;
2669 struct bonding *bond;
2670 unsigned char *arp_ptr;
d3bb52b0 2671 __be32 sip, tip;
f5b2b966 2672
c346dca1 2673 if (dev_net(dev) != &init_net)
e730c155
EB		 2674 goto out;
2675
f5b2b966
JV		 2676 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2677 goto out;
2678
2679 bond = dev->priv;
2680 read_lock(&bond->lock);
2681
2682 dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
2683 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2684 orig_dev ? orig_dev->name : "NULL");
2685
2686 slave = bond_get_slave_by_dev(bond, orig_dev);
2687 if (!slave || !slave_do_arp_validate(bond, slave))
2688 goto out_unlock;
2689
988b7050 2690 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
f5b2b966
JV		 2691 goto out_unlock;
2692
d0a92be0 2693 arp = arp_hdr(skb);
f5b2b966
JV		 2694 if (arp->ar_hln != dev->addr_len ||
2695 skb->pkt_type == PACKET_OTHERHOST ||
2696 skb->pkt_type == PACKET_LOOPBACK ||
2697 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2698 arp->ar_pro != htons(ETH_P_IP) ||
2699 arp->ar_pln != 4)
2700 goto out_unlock;
2701
2702 arp_ptr = (unsigned char *)(arp + 1);
2703 arp_ptr += dev->addr_len;
2704 memcpy(&sip, arp_ptr, 4);
2705 arp_ptr += 4 + dev->addr_len;
2706 memcpy(&tip, arp_ptr, 4);
2707
2708 dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u"
2709 " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name,
2710 slave->state, bond->params.arp_validate,
2711 slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip));
2712
2713 /*
2714 * Backup slaves won't see the ARP reply, but do come through
2715 * here for each ARP probe (so we swap the sip/tip to validate
2716 * the probe). In a "redundant switch, common router" type of
2717 * configuration, the ARP probe will (hopefully) travel from
2718 * the active, through one switch, the router, then the other
2719 * switch before reaching the backup.
2720 */
2721 if (slave->state == BOND_STATE_ACTIVE)
2722 bond_validate_arp(bond, slave, sip, tip);
2723 else
2724 bond_validate_arp(bond, slave, tip, sip);
2725
2726out_unlock:
2727 read_unlock(&bond->lock);
2728out:
2729 dev_kfree_skb(skb);
2730 return NET_RX_SUCCESS;
2731}
2732
1da177e4
LT		 2733/*
2734 * this function is called regularly to monitor each slave's link
2735 * ensuring that traffic is being sent and received when arp monitoring
2736 * is used in load-balancing mode. if the adapter has been dormant, then an
2737 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2738 * arp monitoring in active backup mode.
2739 */
1b76b316 2740void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2741{
1b76b316
JV		 2742 struct bonding *bond = container_of(work, struct bonding,
2743 arp_work.work);
1da177e4
LT		 2744 struct slave *slave, *oldcurrent;
2745 int do_failover = 0;
2746 int delta_in_ticks;
2747 int i;
2748
2749 read_lock(&bond->lock);
2750
5ce0da8f 2751 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4
LT		 2752
2753 if (bond->kill_timers) {
2754 goto out;
2755 }
2756
2757 if (bond->slave_cnt == 0) {
2758 goto re_arm;
2759 }
2760
2761 read_lock(&bond->curr_slave_lock);
2762 oldcurrent = bond->curr_active_slave;
2763 read_unlock(&bond->curr_slave_lock);
2764
2765 /* see if any of the previous devices are up now (i.e. they have
2766 * xmt and rcv traffic). the curr_active_slave does not come into
2767 * the picture unless it is null. also, slave->jiffies is not needed
2768 * here because we send an arp on each slave and give a slave as
2769 * long as it needs to get the tx/rx within the delta.
2770 * TODO: what about up/down delay in arp mode? it wasn't here before
2771 * so it can wait
2772 */
2773 bond_for_each_slave(bond, slave, i) {
2774 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2775 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2776 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2777
2778 slave->link = BOND_LINK_UP;
2779 slave->state = BOND_STATE_ACTIVE;
2780
2781 /* primary_slave has no meaning in round-robin
2782 * mode. the window of a slave being up and
2783 * curr_active_slave being null after enslaving
2784 * is closed.
2785 */
2786 if (!oldcurrent) {
2787 printk(KERN_INFO DRV_NAME
2788 ": %s: link status definitely "
2789 "up for interface %s, ",
1b76b316 2790 bond->dev->name,
1da177e4
LT		 2791 slave->dev->name);
2792 do_failover = 1;
2793 } else {
2794 printk(KERN_INFO DRV_NAME
2795 ": %s: interface %s is now up\n",
1b76b316 2796 bond->dev->name,
1da177e4
LT		 2797 slave->dev->name);
2798 }
2799 }
2800 } else {
2801 /* slave->link == BOND_LINK_UP */
2802
2803 /* not all switches will respond to an arp request
2804 * when the source ip is 0, so don't take the link down
2805 * if we don't know our ip yet
2806 */
b63bb739 2807 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
4b8a9239 2808 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
1da177e4
LT		 2809
2810 slave->link = BOND_LINK_DOWN;
2811 slave->state = BOND_STATE_BACKUP;
2812
2813 if (slave->link_failure_count < UINT_MAX) {
2814 slave->link_failure_count++;
2815 }
2816
2817 printk(KERN_INFO DRV_NAME
2818 ": %s: interface %s is now down.\n",
1b76b316 2819 bond->dev->name,
1da177e4
LT		 2820 slave->dev->name);
2821
2822 if (slave == oldcurrent) {
2823 do_failover = 1;
2824 }
2825 }
2826 }
2827
2828 /* note: if switch is in round-robin mode, all links
2829 * must tx arp to ensure all links rx an arp - otherwise
2830 * links may oscillate or not come up at all; if switch is
2831 * in something like xor mode, there is nothing we can
2832 * do - all replies will be rx'ed on same link causing slaves
2833 * to be unstable during low/no traffic periods
2834 */
2835 if (IS_UP(slave->dev)) {
2836 bond_arp_send_all(bond, slave);
2837 }
2838 }
2839
2840 if (do_failover) {
059fe7a5 2841 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2842
2843 bond_select_active_slave(bond);
2844
059fe7a5 2845 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2846 }
2847
2848re_arm:
1b76b316
JV		 2849 if (bond->params.arp_interval)
2850 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2851out:
2852 read_unlock(&bond->lock);
2853}
2854
2855/*
b2220cad
JV		 2856 * Called to inspect slaves for active-backup mode ARP monitor link state
2857 * changes. Sets new_link in slaves to specify what action should take
2858 * place for the slave. Returns 0 if no changes are found, >0 if changes
2859 * to link states must be committed.
2860 *
2861 * Called with bond->lock held for read.
1da177e4 2862 */
b2220cad 2863static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
1da177e4 2864{
1da177e4 2865 struct slave *slave;
b2220cad 2866 int i, commit = 0;
1da177e4 2867
b2220cad
JV		 2868 bond_for_each_slave(bond, slave, i) {
2869 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2870
b2220cad
JV		 2871 if (slave->link != BOND_LINK_UP) {
2872 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2873 delta_in_ticks)) {
2874 slave->new_link = BOND_LINK_UP;
2875 commit++;
2876 }
1da177e4 2877
b2220cad
JV		 2878 continue;
2879 }
1da177e4 2880
b2220cad
JV		 2881 /*
2882 * Give slaves 2*delta after being enslaved or made
2883 * active. This avoids bouncing, as the last receive
2884 * times need a full ARP monitor cycle to be updated.
2885 */
2886 if (!time_after_eq(jiffies, slave->jiffies +
2887 2 * delta_in_ticks))
2888 continue;
2889
2890 /*
2891 * Backup slave is down if:
2892 * - No current_arp_slave AND
2893 * - more than 3*delta since last receive AND
2894 * - the bond has an IP address
2895 *
2896 * Note: a non-null current_arp_slave indicates
2897 * the curr_active_slave went down and we are
2898 * searching for a new one; under this condition
2899 * we only take the curr_active_slave down - this
2900 * gives each slave a chance to tx/rx traffic
2901 * before being taken out
2902 */
2903 if (slave->state == BOND_STATE_BACKUP &&
2904 !bond->current_arp_slave &&
2905 time_after(jiffies, slave_last_rx(bond, slave) +
2906 3 * delta_in_ticks)) {
2907 slave->new_link = BOND_LINK_DOWN;
2908 commit++;
2909 }
2910
2911 /*
2912 * Active slave is down if:
2913 * - more than 2*delta since transmitting OR
2914 * - (more than 2*delta since receive AND
2915 * the bond has an IP address)
2916 */
2917 if ((slave->state == BOND_STATE_ACTIVE) &&
2918 (time_after_eq(jiffies, slave->dev->trans_start +
2919 2 * delta_in_ticks) ||
2920 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2921 + 2 * delta_in_ticks)))) {
2922 slave->new_link = BOND_LINK_DOWN;
2923 commit++;
2924 }
1da177e4
LT		 2925 }
2926
b2220cad
JV		 2927 read_lock(&bond->curr_slave_lock);
2928
2929 /*
2930 * Trigger a commit if the primary option setting has changed.
1da177e4 2931 */
b2220cad
JV		 2932 if (bond->primary_slave &&
2933 (bond->primary_slave != bond->curr_active_slave) &&
2934 (bond->primary_slave->link == BOND_LINK_UP))
2935 commit++;
1da177e4 2936
b2220cad 2937 read_unlock(&bond->curr_slave_lock);
1da177e4 2938
b2220cad
JV		 2939 return commit;
2940}
1da177e4 2941
b2220cad
JV		 2942/*
2943 * Called to commit link state changes noted by inspection step of
2944 * active-backup mode ARP monitor.
2945 *
2946 * Called with RTNL and bond->lock for read.
2947 */
2948static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2949{
2950 struct slave *slave;
2951 int i;
1da177e4 2952
b2220cad
JV		 2953 bond_for_each_slave(bond, slave, i) {
2954 switch (slave->new_link) {
2955 case BOND_LINK_NOCHANGE:
2956 continue;
ff59c456 2957
b2220cad
JV		 2958 case BOND_LINK_UP:
2959 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2960
b2220cad
JV		 2961 if (!bond->curr_active_slave &&
2962 time_before_eq(jiffies, slave->dev->trans_start +
2963 delta_in_ticks)) {
2964 slave->link = BOND_LINK_UP;
2965 bond_change_active_slave(bond, slave);
2966 bond->current_arp_slave = NULL;
2967
2968 printk(KERN_INFO DRV_NAME
2969 ": %s: %s is up and now the "
2970 "active interface\n",
2971 bond->dev->name, slave->dev->name);
2972
2973 } else if (bond->curr_active_slave != slave) {
2974 /* this slave has just come up but we
2975 * already have a current slave; this can
2976 * also happen if bond_enslave adds a new
2977 * slave that is up while we are searching
2978 * for a new slave
1da177e4 2979 */
b2220cad
JV		 2980 slave->link = BOND_LINK_UP;
2981 bond_set_slave_inactive_flags(slave);
2982 bond->current_arp_slave = NULL;
2983
2984 printk(KERN_INFO DRV_NAME
2985 ": %s: backup interface %s is now up\n",
2986 bond->dev->name, slave->dev->name);
2987 }
1da177e4 2988
b2220cad 2989 write_unlock_bh(&bond->curr_slave_lock);
1da177e4 2990
b2220cad 2991 break;
1da177e4 2992
b2220cad
JV		 2993 case BOND_LINK_DOWN:
2994 if (slave->link_failure_count < UINT_MAX)
2995 slave->link_failure_count++;
2996
2997 slave->link = BOND_LINK_DOWN;
2998
2999 if (slave == bond->curr_active_slave) {
3000 printk(KERN_INFO DRV_NAME
3001 ": %s: link status down for active "
3002 "interface %s, disabling it\n",
3003 bond->dev->name, slave->dev->name);
1da177e4
LT		 3004
3005 bond_set_slave_inactive_flags(slave);
3006
b2220cad
JV		 3007 write_lock_bh(&bond->curr_slave_lock);
3008
3009 bond_select_active_slave(bond);
3010 if (bond->curr_active_slave)
3011 bond->curr_active_slave->jiffies =
3012 jiffies;
3013
3014 write_unlock_bh(&bond->curr_slave_lock);
3015
3016 bond->current_arp_slave = NULL;
3017
3018 } else if (slave->state == BOND_STATE_BACKUP) {
1da177e4
LT		 3019 printk(KERN_INFO DRV_NAME
3020 ": %s: backup interface %s is now down\n",
b2220cad
JV		 3021 bond->dev->name, slave->dev->name);
3022
3023 bond_set_slave_inactive_flags(slave);
1da177e4 3024 }
b2220cad
JV		 3025 break;
3026
3027 default:
3028 printk(KERN_ERR DRV_NAME
3029 ": %s: impossible: new_link %d on slave %s\n",
3030 bond->dev->name, slave->new_link,
3031 slave->dev->name);
1da177e4
LT		 3032 }
3033 }
3034
b2220cad
JV		 3035 /*
3036 * No race with changes to primary via sysfs, as we hold rtnl.
3037 */
3038 if (bond->primary_slave &&
3039 (bond->primary_slave != bond->curr_active_slave) &&
3040 (bond->primary_slave->link == BOND_LINK_UP)) {
3041 write_lock_bh(&bond->curr_slave_lock);
3042 bond_change_active_slave(bond, bond->primary_slave);
3043 write_unlock_bh(&bond->curr_slave_lock);
3044 }
1da177e4 3045
b2220cad
JV		 3046 bond_set_carrier(bond);
3047}
1da177e4 3048
b2220cad
JV		 3049/*
3050 * Send ARP probes for active-backup mode ARP monitor.
3051 *
3052 * Called with bond->lock held for read.
3053 */
3054static void bond_ab_arp_probe(struct bonding *bond)
3055{
3056 struct slave *slave;
3057 int i;
1da177e4 3058
b2220cad 3059 read_lock(&bond->curr_slave_lock);
1da177e4 3060
b2220cad
JV		 3061 if (bond->current_arp_slave && bond->curr_active_slave)
3062 printk("PROBE: c_arp %s && cas %s BAD\n",
3063 bond->current_arp_slave->dev->name,
3064 bond->curr_active_slave->dev->name);
1da177e4 3065
b2220cad
JV		 3066 if (bond->curr_active_slave) {
3067 bond_arp_send_all(bond, bond->curr_active_slave);
3068 read_unlock(&bond->curr_slave_lock);
3069 return;
3070 }
1da177e4 3071
b2220cad 3072 read_unlock(&bond->curr_slave_lock);
059fe7a5 3073
b2220cad
JV		 3074 /* if we don't have a curr_active_slave, search for the next available
3075 * backup slave from the current_arp_slave and make it the candidate
3076 * for becoming the curr_active_slave
3077 */
1da177e4 3078
b2220cad
JV		 3079 if (!bond->current_arp_slave) {
3080 bond->current_arp_slave = bond->first_slave;
3081 if (!bond->current_arp_slave)
3082 return;
3083 }
1da177e4 3084
b2220cad 3085 bond_set_slave_inactive_flags(bond->current_arp_slave);
059fe7a5 3086
b2220cad
JV		 3087 /* search for next candidate */
3088 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3089 if (IS_UP(slave->dev)) {
3090 slave->link = BOND_LINK_BACK;
3091 bond_set_slave_active_flags(slave);
3092 bond_arp_send_all(bond, slave);
1da177e4 3093 slave->jiffies = jiffies;
b2220cad
JV		 3094 bond->current_arp_slave = slave;
3095 break;
1da177e4
LT		 3096 }
3097
b2220cad
JV		 3098 /* if the link state is up at this point, we
3099 * mark it down - this can happen if we have
3100 * simultaneous link failures and
3101 * reselect_active_interface doesn't make this
3102 * one the current slave so it is still marked
3103 * up when it is actually down
1da177e4 3104 */
b2220cad
JV		 3105 if (slave->link == BOND_LINK_UP) {
3106 slave->link = BOND_LINK_DOWN;
3107 if (slave->link_failure_count < UINT_MAX)
3108 slave->link_failure_count++;
1da177e4 3109
b2220cad
JV		 3110 bond_set_slave_inactive_flags(slave);
3111
3112 printk(KERN_INFO DRV_NAME
3113 ": %s: backup interface %s is now down.\n",
3114 bond->dev->name, slave->dev->name);
1da177e4 3115 }
b2220cad
JV		 3116 }
3117}
1da177e4 3118
b2220cad
JV		 3119void bond_activebackup_arp_mon(struct work_struct *work)
3120{
3121 struct bonding *bond = container_of(work, struct bonding,
3122 arp_work.work);
3123 int delta_in_ticks;
1da177e4 3124
b2220cad 3125 read_lock(&bond->lock);
1da177e4 3126
b2220cad
JV		 3127 if (bond->kill_timers)
3128 goto out;
1da177e4 3129
b2220cad 3130 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 3131
b2220cad
JV		 3132 if (bond->slave_cnt == 0)
3133 goto re_arm;
3134
b59f9f74
JV		 3135 if (bond->send_grat_arp) {
3136 read_lock(&bond->curr_slave_lock);
3137 bond_send_gratuitous_arp(bond);
3138 read_unlock(&bond->curr_slave_lock);
3139 }
3140
b2220cad
JV		 3141 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3142 read_unlock(&bond->lock);
3143 rtnl_lock();
3144 read_lock(&bond->lock);
3145
3146 bond_ab_arp_commit(bond, delta_in_ticks);
3147
3148 read_unlock(&bond->lock);
3149 rtnl_unlock();
3150 read_lock(&bond->lock);
1da177e4
LT		 3151 }
3152
b2220cad
JV		 3153 bond_ab_arp_probe(bond);
3154
1da177e4
LT		 3155re_arm:
3156 if (bond->params.arp_interval) {
1b76b316 3157 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3158 }
3159out:
3160 read_unlock(&bond->lock);
3161}
3162
3163/*------------------------------ proc/seq_file-------------------------------*/
3164
3165#ifdef CONFIG_PROC_FS
3166
1da177e4
LT		 3167static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3168{
3169 struct bonding *bond = seq->private;
3170 loff_t off = 0;
3171 struct slave *slave;
3172 int i;
3173
3174 /* make sure the bond won't be taken away */
3175 read_lock(&dev_base_lock);
6603a6f2 3176 read_lock(&bond->lock);
1da177e4
LT		 3177
3178 if (*pos == 0) {
3179 return SEQ_START_TOKEN;
3180 }
3181
3182 bond_for_each_slave(bond, slave, i) {
3183 if (++off == *pos) {
3184 return slave;
3185 }
3186 }
3187
3188 return NULL;
3189}
3190
3191static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3192{
3193 struct bonding *bond = seq->private;
3194 struct slave *slave = v;
3195
3196 ++*pos;
3197 if (v == SEQ_START_TOKEN) {
3198 return bond->first_slave;
3199 }
3200
3201 slave = slave->next;
3202
3203 return (slave == bond->first_slave) ? NULL : slave;
3204}
3205
3206static void bond_info_seq_stop(struct seq_file *seq, void *v)
3207{
3208 struct bonding *bond = seq->private;
3209
6603a6f2 3210 read_unlock(&bond->lock);
1da177e4
LT		 3211 read_unlock(&dev_base_lock);
3212}
3213
3214static void bond_info_show_master(struct seq_file *seq)
3215{
3216 struct bonding *bond = seq->private;
3217 struct slave *curr;
4756b02f
MW		 3218 int i;
3219 u32 target;
1da177e4
LT		 3220
3221 read_lock(&bond->curr_slave_lock);
3222 curr = bond->curr_active_slave;
3223 read_unlock(&bond->curr_slave_lock);
3224
dd957c57 3225 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3226 bond_mode_name(bond->params.mode));
3227
dd957c57
JV		 3228 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3229 bond->params.fail_over_mac)
3915c1e8
JV		 3230 seq_printf(seq, " (fail_over_mac %s)",
3231 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
dd957c57
JV		 3232
3233 seq_printf(seq, "\n");
3234
c61b75ad
MW		 3235 if (bond->params.mode == BOND_MODE_XOR ||
3236 bond->params.mode == BOND_MODE_8023AD) {
3237 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3238 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3239 bond->params.xmit_policy);
3240 }
3241
1da177e4
LT		 3242 if (USES_PRIMARY(bond->params.mode)) {
3243 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3244 (bond->primary_slave) ?
3245 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3246
3247 seq_printf(seq, "Currently Active Slave: %s\n",
3248 (curr) ? curr->dev->name : "None");
3249 }
3250
ff59c456
JV		 3251 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3252 "up" : "down");
1da177e4
LT		 3253 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3254 seq_printf(seq, "Up Delay (ms): %d\n",
3255 bond->params.updelay * bond->params.miimon);
3256 seq_printf(seq, "Down Delay (ms): %d\n",
3257 bond->params.downdelay * bond->params.miimon);
3258
4756b02f
MW		 3259
3260 /* ARP information */
3261 if(bond->params.arp_interval > 0) {
3262 int printed=0;
3263 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3264 bond->params.arp_interval);
3265
3266 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3267
3268 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3269 if (!bond->params.arp_targets[i])
3270 continue;
3271 if (printed)
3272 seq_printf(seq, ",");
3273 target = ntohl(bond->params.arp_targets[i]);
3274 seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target));
3275 printed = 1;
3276 }
3277 seq_printf(seq, "\n");
3278 }
3279
1da177e4
LT		 3280 if (bond->params.mode == BOND_MODE_8023AD) {
3281 struct ad_info ad_info;
0795af57 3282 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3283
3284 seq_puts(seq, "\n802.3ad info\n");
3285 seq_printf(seq, "LACP rate: %s\n",
3286 (bond->params.lacp_fast) ? "fast" : "slow");
3287
3288 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3289 seq_printf(seq, "bond %s has no active aggregator\n",
3290 bond->dev->name);
3291 } else {
3292 seq_printf(seq, "Active Aggregator Info:\n");
3293
3294 seq_printf(seq, "\tAggregator ID: %d\n",
3295 ad_info.aggregator_id);
3296 seq_printf(seq, "\tNumber of ports: %d\n",
3297 ad_info.ports);
3298 seq_printf(seq, "\tActor Key: %d\n",
3299 ad_info.actor_key);
3300 seq_printf(seq, "\tPartner Key: %d\n",
3301 ad_info.partner_key);
0795af57
JP		 3302 seq_printf(seq, "\tPartner Mac Address: %s\n",
3303 print_mac(mac, ad_info.partner_system));
1da177e4
LT		 3304 }
3305 }
3306}
3307
3308static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3309{
3310 struct bonding *bond = seq->private;
0795af57 3311 DECLARE_MAC_BUF(mac);
1da177e4
LT		 3312
3313 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3314 seq_printf(seq, "MII Status: %s\n",
3315 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3316 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3317 slave->link_failure_count);
3318
217df670 3319 seq_printf(seq,
0795af57
JP		 3320 "Permanent HW addr: %s\n",
3321 print_mac(mac, slave->perm_hwaddr));
1da177e4
LT		 3322
3323 if (bond->params.mode == BOND_MODE_8023AD) {
3324 const struct aggregator *agg
3325 = SLAVE_AD_INFO(slave).port.aggregator;
3326
3327 if (agg) {
3328 seq_printf(seq, "Aggregator ID: %d\n",
3329 agg->aggregator_identifier);
3330 } else {
3331 seq_puts(seq, "Aggregator ID: N/A\n");
3332 }
3333 }
3334}
3335
3336static int bond_info_seq_show(struct seq_file *seq, void *v)
3337{
3338 if (v == SEQ_START_TOKEN) {
3339 seq_printf(seq, "%s\n", version);
3340 bond_info_show_master(seq);
3341 } else {
3342 bond_info_show_slave(seq, v);
3343 }
3344
3345 return 0;
3346}
3347
3348static struct seq_operations bond_info_seq_ops = {
3349 .start = bond_info_seq_start,
3350 .next = bond_info_seq_next,
3351 .stop = bond_info_seq_stop,
3352 .show = bond_info_seq_show,
3353};
3354
3355static int bond_info_open(struct inode *inode, struct file *file)
3356{
3357 struct seq_file *seq;
3358 struct proc_dir_entry *proc;
3359 int res;
3360
3361 res = seq_open(file, &bond_info_seq_ops);
3362 if (!res) {
3363 /* recover the pointer buried in proc_dir_entry data */
3364 seq = file->private_data;
3365 proc = PDE(inode);
3366 seq->private = proc->data;
3367 }
3368
3369 return res;
3370}
3371
d54b1fdb 3372static const struct file_operations bond_info_fops = {
1da177e4
LT		 3373 .owner = THIS_MODULE,
3374 .open = bond_info_open,
3375 .read = seq_read,
3376 .llseek = seq_lseek,
3377 .release = seq_release,
3378};
3379
3380static int bond_create_proc_entry(struct bonding *bond)
3381{
3382 struct net_device *bond_dev = bond->dev;
3383
3384 if (bond_proc_dir) {
a95609cb
DL		 3385 bond->proc_entry = proc_create_data(bond_dev->name,
3386 S_IRUGO, bond_proc_dir,
3387 &bond_info_fops, bond);
1da177e4
LT		 3388 if (bond->proc_entry == NULL) {
3389 printk(KERN_WARNING DRV_NAME
3390 ": Warning: Cannot create /proc/net/%s/%s\n",
3391 DRV_NAME, bond_dev->name);
3392 } else {
1da177e4
LT		 3393 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3394 }
3395 }
3396
3397 return 0;
3398}
3399
3400static void bond_remove_proc_entry(struct bonding *bond)
3401{
3402 if (bond_proc_dir && bond->proc_entry) {
3403 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3404 memset(bond->proc_file_name, 0, IFNAMSIZ);
3405 bond->proc_entry = NULL;
3406 }
3407}
3408
3409/* Create the bonding directory under /proc/net, if doesn't exist yet.
3410 * Caller must hold rtnl_lock.
3411 */
3412static void bond_create_proc_dir(void)
3413{
3414 int len = strlen(DRV_NAME);
3415
457c4cbc 3416 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3417 bond_proc_dir = bond_proc_dir->next) {
3418 if ((bond_proc_dir->namelen == len) &&
3419 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3420 break;
3421 }
3422 }
3423
3424 if (!bond_proc_dir) {
457c4cbc 3425 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3426 if (bond_proc_dir) {
3427 bond_proc_dir->owner = THIS_MODULE;
3428 } else {
3429 printk(KERN_WARNING DRV_NAME
3430 ": Warning: cannot create /proc/net/%s\n",
3431 DRV_NAME);
3432 }
3433 }
3434}
3435
3436/* Destroy the bonding directory under /proc/net, if empty.
3437 * Caller must hold rtnl_lock.
3438 */
3439static void bond_destroy_proc_dir(void)
3440{
3441 struct proc_dir_entry *de;
3442
3443 if (!bond_proc_dir) {
3444 return;
3445 }
3446
3447 /* verify that the /proc dir is empty */
3448 for (de = bond_proc_dir->subdir; de; de = de->next) {
3449 /* ignore . and .. */
3450 if (*(de->name) != '.') {
3451 break;
3452 }
3453 }
3454
3455 if (de) {
3456 if (bond_proc_dir->owner == THIS_MODULE) {
3457 bond_proc_dir->owner = NULL;
3458 }
3459 } else {
457c4cbc 3460 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3461 bond_proc_dir = NULL;
3462 }
3463}
3464#endif /* CONFIG_PROC_FS */
3465
3466/*-------------------------- netdev event handling --------------------------*/
3467
3468/*
3469 * Change device name
3470 */
3471static int bond_event_changename(struct bonding *bond)
3472{
3473#ifdef CONFIG_PROC_FS
3474 bond_remove_proc_entry(bond);
3475 bond_create_proc_entry(bond);
3476#endif
b76cdba9
MW		 3477 down_write(&(bonding_rwsem));
3478 bond_destroy_sysfs_entry(bond);
3479 bond_create_sysfs_entry(bond);
3480 up_write(&(bonding_rwsem));
1da177e4
LT		 3481 return NOTIFY_DONE;
3482}
3483
3484static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3485{
3486 struct bonding *event_bond = bond_dev->priv;
3487
3488 switch (event) {
3489 case NETDEV_CHANGENAME:
3490 return bond_event_changename(event_bond);
3491 case NETDEV_UNREGISTER:
3b96c858 3492 bond_release_all(event_bond->dev);
1da177e4
LT		 3493 break;
3494 default:
3495 break;
3496 }
3497
3498 return NOTIFY_DONE;
3499}
3500
3501static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3502{
3503 struct net_device *bond_dev = slave_dev->master;
8531c5ff 3504 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3505
3506 switch (event) {
3507 case NETDEV_UNREGISTER:
3508 if (bond_dev) {
1284cd3a
JV		 3509 if (bond->setup_by_slave)
3510 bond_release_and_destroy(bond_dev, slave_dev);
3511 else
3512 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3513 }
3514 break;
3515 case NETDEV_CHANGE:
3516 /*
3517 * TODO: is this what we get if somebody
3518 * sets up a hierarchical bond, then rmmod's
3519 * one of the slave bonding devices?
3520 */
3521 break;
3522 case NETDEV_DOWN:
3523 /*
3524 * ... Or is it this?
3525 */
3526 break;
3527 case NETDEV_CHANGEMTU:
3528 /*
3529 * TODO: Should slaves be allowed to
3530 * independently alter their MTU? For
3531 * an active-backup bond, slaves need
3532 * not be the same type of device, so
3533 * MTUs may vary. For other modes,
3534 * slaves arguably should have the
3535 * same MTUs. To do this, we'd need to
3536 * take over the slave's change_mtu
3537 * function for the duration of their
3538 * servitude.
3539 */
3540 break;
3541 case NETDEV_CHANGENAME:
3542 /*
3543 * TODO: handle changing the primary's name
3544 */
3545 break;
8531c5ff
AK		 3546 case NETDEV_FEAT_CHANGE:
3547 bond_compute_features(bond);
3548 break;
1da177e4
LT		 3549 default:
3550 break;
3551 }
3552
3553 return NOTIFY_DONE;
3554}
3555
3556/*
3557 * bond_netdev_event: handle netdev notifier chain events.
3558 *
3559 * This function receives events for the netdev chain. The caller (an
e041c683 3560 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3561 * locks for us to safely manipulate the slave devices (RTNL lock,
3562 * dev_probe_lock).
3563 */
3564static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3565{
3566 struct net_device *event_dev = (struct net_device *)ptr;
3567
c346dca1 3568 if (dev_net(event_dev) != &init_net)
e9dc8653
EB		 3569 return NOTIFY_DONE;
3570
1da177e4
LT		 3571 dprintk("event_dev: %s, event: %lx\n",
3572 (event_dev ? event_dev->name : "None"),
3573 event);
3574
0b680e75
JV		 3575 if (!(event_dev->priv_flags & IFF_BONDING))
3576 return NOTIFY_DONE;
3577
1da177e4
LT		 3578 if (event_dev->flags & IFF_MASTER) {
3579 dprintk("IFF_MASTER\n");
3580 return bond_master_netdev_event(event, event_dev);
3581 }
3582
3583 if (event_dev->flags & IFF_SLAVE) {
3584 dprintk("IFF_SLAVE\n");
3585 return bond_slave_netdev_event(event, event_dev);
3586 }
3587
3588 return NOTIFY_DONE;
3589}
3590
c3ade5ca
JV		 3591/*
3592 * bond_inetaddr_event: handle inetaddr notifier chain events.
3593 *
3594 * We keep track of device IPs primarily to use as source addresses in
3595 * ARP monitor probes (rather than spewing out broadcasts all the time).
3596 *
3597 * We track one IP for the main device (if it has one), plus one per VLAN.
3598 */
3599static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3600{
3601 struct in_ifaddr *ifa = ptr;
3602 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
0883beca
PE		 3603 struct bonding *bond;
3604 struct vlan_entry *vlan;
c3ade5ca 3605
c346dca1 3606 if (dev_net(ifa->ifa_dev->dev) != &init_net)
6133fb1a
DL		 3607 return NOTIFY_DONE;
3608
0883beca 3609 list_for_each_entry(bond, &bond_dev_list, bond_list) {
c3ade5ca
JV		 3610 if (bond->dev == event_dev) {
3611 switch (event) {
3612 case NETDEV_UP:
3613 bond->master_ip = ifa->ifa_local;
3614 return NOTIFY_OK;
3615 case NETDEV_DOWN:
3616 bond->master_ip = bond_glean_dev_ip(bond->dev);
3617 return NOTIFY_OK;
3618 default:
3619 return NOTIFY_DONE;
3620 }
3621 }
3622
0883beca 3623 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 3624 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3625 if (vlan_dev == event_dev) {
3626 switch (event) {
3627 case NETDEV_UP:
3628 vlan->vlan_ip = ifa->ifa_local;
3629 return NOTIFY_OK;
3630 case NETDEV_DOWN:
3631 vlan->vlan_ip =
3632 bond_glean_dev_ip(vlan_dev);
3633 return NOTIFY_OK;
3634 default:
3635 return NOTIFY_DONE;
3636 }
3637 }
3638 }
3639 }
3640 return NOTIFY_DONE;
3641}
3642
1da177e4
LT		 3643static struct notifier_block bond_netdev_notifier = {
3644 .notifier_call = bond_netdev_event,
3645};
3646
c3ade5ca
JV		 3647static struct notifier_block bond_inetaddr_notifier = {
3648 .notifier_call = bond_inetaddr_event,
3649};
3650
1da177e4
LT		 3651/*-------------------------- Packet type handling ---------------------------*/
3652
3653/* register to receive lacpdus on a bond */
3654static void bond_register_lacpdu(struct bonding *bond)
3655{
3656 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3657
3658 /* initialize packet type */
3659 pk_type->type = PKT_TYPE_LACPDU;
3660 pk_type->dev = bond->dev;
3661 pk_type->func = bond_3ad_lacpdu_recv;
3662
3663 dev_add_pack(pk_type);
3664}
3665
3666/* unregister to receive lacpdus on a bond */
3667static void bond_unregister_lacpdu(struct bonding *bond)
3668{
3669 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3670}
3671
f5b2b966
JV		 3672void bond_register_arp(struct bonding *bond)
3673{
3674 struct packet_type *pt = &bond->arp_mon_pt;
3675
c4f283b1
JV		 3676 if (pt->type)
3677 return;
3678
f5b2b966 3679 pt->type = htons(ETH_P_ARP);
e245cb71 3680 pt->dev = bond->dev;
f5b2b966
JV		 3681 pt->func = bond_arp_rcv;
3682 dev_add_pack(pt);
3683}
3684
3685void bond_unregister_arp(struct bonding *bond)
3686{
c4f283b1
JV		 3687 struct packet_type *pt = &bond->arp_mon_pt;
3688
3689 dev_remove_pack(pt);
3690 pt->type = 0;
f5b2b966
JV		 3691}
3692
169a3e66
JV		 3693/*---------------------------- Hashing Policies -----------------------------*/
3694
6f6652be
JV		 3695/*
3696 * Hash for the output device based upon layer 2 and layer 3 data. If
3697 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3698 */
3699static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3700 struct net_device *bond_dev, int count)
3701{
3702 struct ethhdr *data = (struct ethhdr *)skb->data;
3703 struct iphdr *iph = ip_hdr(skb);
3704
f14c4e4e 3705 if (skb->protocol == htons(ETH_P_IP)) {
6f6652be
JV		 3706 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3707 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3708 }
3709
3710 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3711}
3712
169a3e66 3713/*
59c51591 3714 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3715 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3716 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3717 */
3718static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3719 struct net_device *bond_dev, int count)
3720{
3721 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3722 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3723 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3724 int layer4_xor = 0;
3725
f14c4e4e
BH		 3726 if (skb->protocol == htons(ETH_P_IP)) {
3727 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
169a3e66
JV		 3728 (iph->protocol == IPPROTO_TCP ||
3729 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3730 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3731 }
3732 return (layer4_xor ^
3733 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3734
3735 }
3736
3737 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3738}
3739
3740/*
3741 * Hash for the output device based upon layer 2 data
3742 */
3743static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3744 struct net_device *bond_dev, int count)
3745{
3746 struct ethhdr *data = (struct ethhdr *)skb->data;
3747
3748 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3749}
3750
1da177e4
LT		 3751/*-------------------------- Device entry points ----------------------------*/
3752
3753static int bond_open(struct net_device *bond_dev)
3754{
3755 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 3756
3757 bond->kill_timers = 0;
3758
3759 if ((bond->params.mode == BOND_MODE_TLB) ||
3760 (bond->params.mode == BOND_MODE_ALB)) {
1da177e4
LT		 3761 /* bond_alb_initialize must be called before the timer
3762 * is started.
3763 */
3764 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3765 /* something went wrong - fail the open operation */
3766 return -1;
3767 }
3768
1b76b316
JV		 3769 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3770 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3771 }
3772
3773 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3774 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3775 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3776 }
3777
3778 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3779 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3780 INIT_DELAYED_WORK(&bond->arp_work,
3781 bond_activebackup_arp_mon);
3782 else
3783 INIT_DELAYED_WORK(&bond->arp_work,
3784 bond_loadbalance_arp_mon);
3785
3786 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3787 if (bond->params.arp_validate)
3788 bond_register_arp(bond);
1da177e4
LT		 3789 }
3790
3791 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3792 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3793 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3794 /* register to receive LACPDUs */
3795 bond_register_lacpdu(bond);
3796 }
3797
3798 return 0;
3799}
3800
3801static int bond_close(struct net_device *bond_dev)
3802{
3803 struct bonding *bond = bond_dev->priv;
3804
3805 if (bond->params.mode == BOND_MODE_8023AD) {
3806 /* Unregister the receive of LACPDUs */
3807 bond_unregister_lacpdu(bond);
3808 }
3809
f5b2b966
JV		 3810 if (bond->params.arp_validate)
3811 bond_unregister_arp(bond);
3812
1da177e4
LT		 3813 write_lock_bh(&bond->lock);
3814
b59f9f74 3815 bond->send_grat_arp = 0;
1da177e4
LT		 3816
3817 /* signal timers not to re-arm */
3818 bond->kill_timers = 1;
3819
3820 write_unlock_bh(&bond->lock);
3821
1da177e4 3822 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3823 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3824 }
3825
3826 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3827 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3828 }
3829
3830 switch (bond->params.mode) {
3831 case BOND_MODE_8023AD:
1b76b316 3832 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3833 break;
3834 case BOND_MODE_TLB:
3835 case BOND_MODE_ALB:
1b76b316 3836 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3837 break;
3838 default:
3839 break;
3840 }
3841
1da177e4
LT		 3842
3843 if ((bond->params.mode == BOND_MODE_TLB) ||
3844 (bond->params.mode == BOND_MODE_ALB)) {
3845 /* Must be called only after all
3846 * slaves have been released
3847 */
3848 bond_alb_deinitialize(bond);
3849 }
3850
3851 return 0;
3852}
3853
3854static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3855{
3856 struct bonding *bond = bond_dev->priv;
3857 struct net_device_stats *stats = &(bond->stats), *sstats;
2439f9eb 3858 struct net_device_stats local_stats;
1da177e4
LT		 3859 struct slave *slave;
3860 int i;
3861
2439f9eb 3862 memset(&local_stats, 0, sizeof(struct net_device_stats));
1da177e4
LT		 3863
3864 read_lock_bh(&bond->lock);
3865
3866 bond_for_each_slave(bond, slave, i) {
c45d286e 3867 sstats = slave->dev->get_stats(slave->dev);
2439f9eb
AG		 3868 local_stats.rx_packets += sstats->rx_packets;
3869 local_stats.rx_bytes += sstats->rx_bytes;
3870 local_stats.rx_errors += sstats->rx_errors;
3871 local_stats.rx_dropped += sstats->rx_dropped;
3872
3873 local_stats.tx_packets += sstats->tx_packets;
3874 local_stats.tx_bytes += sstats->tx_bytes;
3875 local_stats.tx_errors += sstats->tx_errors;
3876 local_stats.tx_dropped += sstats->tx_dropped;
3877
3878 local_stats.multicast += sstats->multicast;
3879 local_stats.collisions += sstats->collisions;
3880
3881 local_stats.rx_length_errors += sstats->rx_length_errors;
3882 local_stats.rx_over_errors += sstats->rx_over_errors;
3883 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3884 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3885 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3886 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3887
3888 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3889 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3890 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3891 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3892 local_stats.tx_window_errors += sstats->tx_window_errors;
3893 }
3894
3895 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
1da177e4
LT		 3896
3897 read_unlock_bh(&bond->lock);
3898
3899 return stats;
3900}
3901
3902static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3903{
3904 struct net_device *slave_dev = NULL;
3905 struct ifbond k_binfo;
3906 struct ifbond __user *u_binfo = NULL;
3907 struct ifslave k_sinfo;
3908 struct ifslave __user *u_sinfo = NULL;
3909 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3910 int res = 0;
3911
3912 dprintk("bond_ioctl: master=%s, cmd=%d\n",
3913 bond_dev->name, cmd);
3914
3915 switch (cmd) {
1da177e4
LT		 3916 case SIOCGMIIPHY:
3917 mii = if_mii(ifr);
3918 if (!mii) {
3919 return -EINVAL;
3920 }
3921 mii->phy_id = 0;
3922 /* Fall Through */
3923 case SIOCGMIIREG:
3924 /*
3925 * We do this again just in case we were called by SIOCGMIIREG
3926 * instead of SIOCGMIIPHY.
3927 */
3928 mii = if_mii(ifr);
3929 if (!mii) {
3930 return -EINVAL;
3931 }
3932
3933 if (mii->reg_num == 1) {
3934 struct bonding *bond = bond_dev->priv;
3935 mii->val_out = 0;
6603a6f2 3936 read_lock(&bond->lock);
1da177e4 3937 read_lock(&bond->curr_slave_lock);
4e140079 3938 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3939 mii->val_out = BMSR_LSTATUS;
3940 }
3941 read_unlock(&bond->curr_slave_lock);
6603a6f2 3942 read_unlock(&bond->lock);
1da177e4
LT		 3943 }
3944
3945 return 0;
3946 case BOND_INFO_QUERY_OLD:
3947 case SIOCBONDINFOQUERY:
3948 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3949
3950 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3951 return -EFAULT;
3952 }
3953
3954 res = bond_info_query(bond_dev, &k_binfo);
3955 if (res == 0) {
3956 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3957 return -EFAULT;
3958 }
3959 }
3960
3961 return res;
3962 case BOND_SLAVE_INFO_QUERY_OLD:
3963 case SIOCBONDSLAVEINFOQUERY:
3964 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3965
3966 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3967 return -EFAULT;
3968 }
3969
3970 res = bond_slave_info_query(bond_dev, &k_sinfo);
3971 if (res == 0) {
3972 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3973 return -EFAULT;
3974 }
3975 }
3976
3977 return res;
3978 default:
3979 /* Go on */
3980 break;
3981 }
3982
3983 if (!capable(CAP_NET_ADMIN)) {
3984 return -EPERM;
3985 }
3986
b76cdba9 3987 down_write(&(bonding_rwsem));
881d966b 3988 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4
LT		 3989
3990 dprintk("slave_dev=%p: \n", slave_dev);
3991
3992 if (!slave_dev) {
3993 res = -ENODEV;
3994 } else {
3995 dprintk("slave_dev->name=%s: \n", slave_dev->name);
3996 switch (cmd) {
3997 case BOND_ENSLAVE_OLD:
3998 case SIOCBONDENSLAVE:
3999 res = bond_enslave(bond_dev, slave_dev);
4000 break;
4001 case BOND_RELEASE_OLD:
4002 case SIOCBONDRELEASE:
4003 res = bond_release(bond_dev, slave_dev);
4004 break;
4005 case BOND_SETHWADDR_OLD:
4006 case SIOCBONDSETHWADDR:
4007 res = bond_sethwaddr(bond_dev, slave_dev);
4008 break;
4009 case BOND_CHANGE_ACTIVE_OLD:
4010 case SIOCBONDCHANGEACTIVE:
4011 res = bond_ioctl_change_active(bond_dev, slave_dev);
4012 break;
4013 default:
4014 res = -EOPNOTSUPP;
4015 }
4016
4017 dev_put(slave_dev);
4018 }
4019
b76cdba9 4020 up_write(&(bonding_rwsem));
1da177e4
LT		 4021 return res;
4022}
4023
4024static void bond_set_multicast_list(struct net_device *bond_dev)
4025{
4026 struct bonding *bond = bond_dev->priv;
4027 struct dev_mc_list *dmi;
4028
1da177e4
LT		 4029 /*
4030 * Do promisc before checking multicast_mode
4031 */
4032 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
7e1a1ac1
WC		 4033 /*
4034 * FIXME: Need to handle the error when one of the multi-slaves
4035 * encounters error.
4036 */
1da177e4
LT		 4037 bond_set_promiscuity(bond, 1);
4038 }
4039
4040 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
4041 bond_set_promiscuity(bond, -1);
4042 }
4043
4044 /* set allmulti flag to slaves */
4045 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
7e1a1ac1
WC		 4046 /*
4047 * FIXME: Need to handle the error when one of the multi-slaves
4048 * encounters error.
4049 */
1da177e4
LT		 4050 bond_set_allmulti(bond, 1);
4051 }
4052
4053 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
4054 bond_set_allmulti(bond, -1);
4055 }
4056
80ee5ad2
JV		 4057 read_lock(&bond->lock);
4058
1da177e4
LT		 4059 bond->flags = bond_dev->flags;
4060
4061 /* looking for addresses to add to slaves' mc list */
4062 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4063 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
4064 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4065 }
4066 }
4067
4068 /* looking for addresses to delete from slaves' list */
4069 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4070 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
4071 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4072 }
4073 }
4074
4075 /* save master's multicast list */
4076 bond_mc_list_destroy(bond);
4077 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4078
80ee5ad2 4079 read_unlock(&bond->lock);
1da177e4
LT		 4080}
4081
4082/*
4083 * Change the MTU of all of a master's slaves to match the master
4084 */
4085static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4086{
4087 struct bonding *bond = bond_dev->priv;
4088 struct slave *slave, *stop_at;
4089 int res = 0;
4090 int i;
4091
4092 dprintk("bond=%p, name=%s, new_mtu=%d\n", bond,
4093 (bond_dev ? bond_dev->name : "None"), new_mtu);
4094
4095 /* Can't hold bond->lock with bh disabled here since
4096 * some base drivers panic. On the other hand we can't
4097 * hold bond->lock without bh disabled because we'll
4098 * deadlock. The only solution is to rely on the fact
4099 * that we're under rtnl_lock here, and the slaves
4100 * list won't change. This doesn't solve the problem
4101 * of setting the slave's MTU while it is
4102 * transmitting, but the assumption is that the base
4103 * driver can handle that.
4104 *
4105 * TODO: figure out a way to safely iterate the slaves
4106 * list, but without holding a lock around the actual
4107 * call to the base driver.
4108 */
4109
4110 bond_for_each_slave(bond, slave, i) {
4111 dprintk("s %p s->p %p c_m %p\n", slave,
4112 slave->prev, slave->dev->change_mtu);
e944ef79 4113
1da177e4
LT		 4114 res = dev_set_mtu(slave->dev, new_mtu);
4115
4116 if (res) {
4117 /* If we failed to set the slave's mtu to the new value
4118 * we must abort the operation even in ACTIVE_BACKUP
4119 * mode, because if we allow the backup slaves to have
4120 * different mtu values than the active slave we'll
4121 * need to change their mtu when doing a failover. That
4122 * means changing their mtu from timer context, which
4123 * is probably not a good idea.
4124 */
4125 dprintk("err %d %s\n", res, slave->dev->name);
4126 goto unwind;
4127 }
4128 }
4129
4130 bond_dev->mtu = new_mtu;
4131
4132 return 0;
4133
4134unwind:
4135 /* unwind from head to the slave that failed */
4136 stop_at = slave;
4137 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4138 int tmp_res;
4139
4140 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4141 if (tmp_res) {
4142 dprintk("unwind err %d dev %s\n", tmp_res,
4143 slave->dev->name);
4144 }
4145 }
4146
4147 return res;
4148}
4149
4150/*
4151 * Change HW address
4152 *
4153 * Note that many devices must be down to change the HW address, and
4154 * downing the master releases all slaves. We can make bonds full of
4155 * bonding devices to test this, however.
4156 */
4157static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4158{
4159 struct bonding *bond = bond_dev->priv;
4160 struct sockaddr *sa = addr, tmp_sa;
4161 struct slave *slave, *stop_at;
4162 int res = 0;
4163 int i;
4164
4165 dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
4166
dd957c57 4167 /*
3915c1e8
JV		 4168 * If fail_over_mac is set to active, do nothing and return
4169 * success. Returning an error causes ifenslave to fail.
dd957c57 4170 */
3915c1e8 4171 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
dd957c57 4172 return 0;
2ab82852 4173
1da177e4
LT		 4174 if (!is_valid_ether_addr(sa->sa_data)) {
4175 return -EADDRNOTAVAIL;
4176 }
4177
4178 /* Can't hold bond->lock with bh disabled here since
4179 * some base drivers panic. On the other hand we can't
4180 * hold bond->lock without bh disabled because we'll
4181 * deadlock. The only solution is to rely on the fact
4182 * that we're under rtnl_lock here, and the slaves
4183 * list won't change. This doesn't solve the problem
4184 * of setting the slave's hw address while it is
4185 * transmitting, but the assumption is that the base
4186 * driver can handle that.
4187 *
4188 * TODO: figure out a way to safely iterate the slaves
4189 * list, but without holding a lock around the actual
4190 * call to the base driver.
4191 */
4192
4193 bond_for_each_slave(bond, slave, i) {
4194 dprintk("slave %p %s\n", slave, slave->dev->name);
4195
4196 if (slave->dev->set_mac_address == NULL) {
4197 res = -EOPNOTSUPP;
4198 dprintk("EOPNOTSUPP %s\n", slave->dev->name);
4199 goto unwind;
4200 }
4201
4202 res = dev_set_mac_address(slave->dev, addr);
4203 if (res) {
4204 /* TODO: consider downing the slave
4205 * and retry ?
4206 * User should expect communications
4207 * breakage anyway until ARP finish
4208 * updating, so...
4209 */
4210 dprintk("err %d %s\n", res, slave->dev->name);
4211 goto unwind;
4212 }
4213 }
4214
4215 /* success */
4216 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4217 return 0;
4218
4219unwind:
4220 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4221 tmp_sa.sa_family = bond_dev->type;
4222
4223 /* unwind from head to the slave that failed */
4224 stop_at = slave;
4225 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4226 int tmp_res;
4227
4228 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4229 if (tmp_res) {
4230 dprintk("unwind err %d dev %s\n", tmp_res,
4231 slave->dev->name);
4232 }
4233 }
4234
4235 return res;
4236}
4237
4238static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4239{
4240 struct bonding *bond = bond_dev->priv;
4241 struct slave *slave, *start_at;
cf5f9044 4242 int i, slave_no, res = 1;
1da177e4
LT		 4243
4244 read_lock(&bond->lock);
4245
4246 if (!BOND_IS_OK(bond)) {
4247 goto out;
4248 }
4249
cf5f9044
JV		 4250 /*
4251 * Concurrent TX may collide on rr_tx_counter; we accept that
4252 * as being rare enough not to justify using an atomic op here
4253 */
4254 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4255
cf5f9044
JV		 4256 bond_for_each_slave(bond, slave, i) {
4257 slave_no--;
4258 if (slave_no < 0) {
4259 break;
4260 }
1da177e4
LT		 4261 }
4262
cf5f9044 4263 start_at = slave;
1da177e4
LT		 4264 bond_for_each_slave_from(bond, slave, i, start_at) {
4265 if (IS_UP(slave->dev) &&
4266 (slave->link == BOND_LINK_UP) &&
4267 (slave->state == BOND_STATE_ACTIVE)) {
4268 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4269 break;
4270 }
4271 }
4272
1da177e4
LT		 4273out:
4274 if (res) {
4275 /* no suitable interface, frame not sent */
4276 dev_kfree_skb(skb);
4277 }
4278 read_unlock(&bond->lock);
4279 return 0;
4280}
4281
075897ce 4282
1da177e4
LT		 4283/*
4284 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4285 * the bond has a usable interface.
4286 */
4287static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4288{
4289 struct bonding *bond = bond_dev->priv;
4290 int res = 1;
4291
1da177e4
LT		 4292 read_lock(&bond->lock);
4293 read_lock(&bond->curr_slave_lock);
4294
4295 if (!BOND_IS_OK(bond)) {
4296 goto out;
4297 }
4298
075897ce
JL		 4299 if (!bond->curr_active_slave)
4300 goto out;
4301
075897ce
JL		 4302 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4303
1da177e4
LT		 4304out:
4305 if (res) {
4306 /* no suitable interface, frame not sent */
4307 dev_kfree_skb(skb);
4308 }
4309 read_unlock(&bond->curr_slave_lock);
4310 read_unlock(&bond->lock);
4311 return 0;
4312}
4313
4314/*
169a3e66
JV		 4315 * In bond_xmit_xor() , we determine the output device by using a pre-
4316 * determined xmit_hash_policy(), If the selected device is not enabled,
4317 * find the next active slave.
1da177e4
LT		 4318 */
4319static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4320{
4321 struct bonding *bond = bond_dev->priv;
1da177e4
LT		 4322 struct slave *slave, *start_at;
4323 int slave_no;
4324 int i;
4325 int res = 1;
4326
4327 read_lock(&bond->lock);
4328
4329 if (!BOND_IS_OK(bond)) {
4330 goto out;
4331 }
4332
169a3e66 4333 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4334
4335 bond_for_each_slave(bond, slave, i) {
4336 slave_no--;
4337 if (slave_no < 0) {
4338 break;
4339 }
4340 }
4341
4342 start_at = slave;
4343
4344 bond_for_each_slave_from(bond, slave, i, start_at) {
4345 if (IS_UP(slave->dev) &&
4346 (slave->link == BOND_LINK_UP) &&
4347 (slave->state == BOND_STATE_ACTIVE)) {
4348 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4349 break;
4350 }
4351 }
4352
4353out:
4354 if (res) {
4355 /* no suitable interface, frame not sent */
4356 dev_kfree_skb(skb);
4357 }
4358 read_unlock(&bond->lock);
4359 return 0;
4360}
4361
4362/*
4363 * in broadcast mode, we send everything to all usable interfaces.
4364 */
4365static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4366{
4367 struct bonding *bond = bond_dev->priv;
4368 struct slave *slave, *start_at;
4369 struct net_device *tx_dev = NULL;
4370 int i;
4371 int res = 1;
4372
4373 read_lock(&bond->lock);
4374
4375 if (!BOND_IS_OK(bond)) {
4376 goto out;
4377 }
4378
4379 read_lock(&bond->curr_slave_lock);
4380 start_at = bond->curr_active_slave;
4381 read_unlock(&bond->curr_slave_lock);
4382
4383 if (!start_at) {
4384 goto out;
4385 }
4386
4387 bond_for_each_slave_from(bond, slave, i, start_at) {
4388 if (IS_UP(slave->dev) &&
4389 (slave->link == BOND_LINK_UP) &&
4390 (slave->state == BOND_STATE_ACTIVE)) {
4391 if (tx_dev) {
4392 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4393 if (!skb2) {
4394 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4395 ": %s: Error: bond_xmit_broadcast(): "
4396 "skb_clone() failed\n",
4397 bond_dev->name);
1da177e4
LT		 4398 continue;
4399 }
4400
4401 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4402 if (res) {
4403 dev_kfree_skb(skb2);
4404 continue;
4405 }
4406 }
4407 tx_dev = slave->dev;
4408 }
4409 }
4410
4411 if (tx_dev) {
4412 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4413 }
4414
4415out:
4416 if (res) {
4417 /* no suitable interface, frame not sent */
4418 dev_kfree_skb(skb);
4419 }
4420 /* frame sent to all suitable interfaces */
4421 read_unlock(&bond->lock);
4422 return 0;
4423}
4424
4425/*------------------------- Device initialization ---------------------------*/
4426
6f6652be
JV		 4427static void bond_set_xmit_hash_policy(struct bonding *bond)
4428{
4429 switch (bond->params.xmit_policy) {
4430 case BOND_XMIT_POLICY_LAYER23:
4431 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4432 break;
4433 case BOND_XMIT_POLICY_LAYER34:
4434 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4435 break;
4436 case BOND_XMIT_POLICY_LAYER2:
4437 default:
4438 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4439 break;
4440 }
4441}
4442
1da177e4
LT		 4443/*
4444 * set bond mode specific net device operations
4445 */
a77b5325 4446void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4447{
169a3e66
JV		 4448 struct net_device *bond_dev = bond->dev;
4449
1da177e4
LT		 4450 switch (mode) {
4451 case BOND_MODE_ROUNDROBIN:
4452 bond_dev->hard_start_xmit = bond_xmit_roundrobin;
4453 break;
4454 case BOND_MODE_ACTIVEBACKUP:
4455 bond_dev->hard_start_xmit = bond_xmit_activebackup;
4456 break;
4457 case BOND_MODE_XOR:
4458 bond_dev->hard_start_xmit = bond_xmit_xor;
6f6652be 4459 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4460 break;
4461 case BOND_MODE_BROADCAST:
4462 bond_dev->hard_start_xmit = bond_xmit_broadcast;
4463 break;
4464 case BOND_MODE_8023AD:
8f903c70 4465 bond_set_master_3ad_flags(bond);
1da177e4 4466 bond_dev->hard_start_xmit = bond_3ad_xmit_xor;
6f6652be 4467 bond_set_xmit_hash_policy(bond);
1da177e4 4468 break;
1da177e4 4469 case BOND_MODE_ALB:
8f903c70
JV		 4470 bond_set_master_alb_flags(bond);
4471 /* FALLTHRU */
4472 case BOND_MODE_TLB:
1da177e4
LT		 4473 bond_dev->hard_start_xmit = bond_alb_xmit;
4474 bond_dev->set_mac_address = bond_alb_set_mac_address;
4475 break;
4476 default:
4477 /* Should never happen, mode already checked */
4478 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4479 ": %s: Error: Unknown bonding mode %d\n",
4480 bond_dev->name,
1da177e4
LT		 4481 mode);
4482 break;
4483 }
4484}
4485
217df670
JV		 4486static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4487 struct ethtool_drvinfo *drvinfo)
4488{
4489 strncpy(drvinfo->driver, DRV_NAME, 32);
4490 strncpy(drvinfo->version, DRV_VERSION, 32);
4491 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4492}
4493
7282d491 4494static const struct ethtool_ops bond_ethtool_ops = {
217df670 4495 .get_drvinfo = bond_ethtool_get_drvinfo,
fa53ebac
SH		 4496 .get_link = ethtool_op_get_link,
4497 .get_tx_csum = ethtool_op_get_tx_csum,
4498 .get_sg = ethtool_op_get_sg,
4499 .get_tso = ethtool_op_get_tso,
4500 .get_ufo = ethtool_op_get_ufo,
4501 .get_flags = ethtool_op_get_flags,
8531c5ff
AK		 4502};
4503
1da177e4
LT		 4504/*
4505 * Does not allocate but creates a /proc entry.
4506 * Allowed to fail.
4507 */
3c535952 4508static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4
LT		 4509{
4510 struct bonding *bond = bond_dev->priv;
4511
4512 dprintk("Begin bond_init for %s\n", bond_dev->name);
4513
4514 /* initialize rwlocks */
4515 rwlock_init(&bond->lock);
4516 rwlock_init(&bond->curr_slave_lock);
4517
4518 bond->params = *params; /* copy params struct */
4519
1b76b316
JV		 4520 bond->wq = create_singlethread_workqueue(bond_dev->name);
4521 if (!bond->wq)
4522 return -ENOMEM;
4523
1da177e4
LT		 4524 /* Initialize pointers */
4525 bond->first_slave = NULL;
4526 bond->curr_active_slave = NULL;
4527 bond->current_arp_slave = NULL;
4528 bond->primary_slave = NULL;
4529 bond->dev = bond_dev;
1053f62c 4530 bond->send_grat_arp = 0;
d90a162a 4531 bond->setup_by_slave = 0;
1da177e4
LT		 4532 INIT_LIST_HEAD(&bond->vlan_list);
4533
4534 /* Initialize the device entry points */
4535 bond_dev->open = bond_open;
4536 bond_dev->stop = bond_close;
4537 bond_dev->get_stats = bond_get_stats;
4538 bond_dev->do_ioctl = bond_do_ioctl;
8531c5ff 4539 bond_dev->ethtool_ops = &bond_ethtool_ops;
1da177e4
LT		 4540 bond_dev->set_multicast_list = bond_set_multicast_list;
4541 bond_dev->change_mtu = bond_change_mtu;
4542 bond_dev->set_mac_address = bond_set_mac_address;
3a1521b7 4543 bond_dev->validate_addr = NULL;
1da177e4 4544
169a3e66 4545 bond_set_mode_ops(bond, bond->params.mode);
1da177e4
LT		 4546
4547 bond_dev->destructor = free_netdev;
4548
4549 /* Initialize the device options */
4550 bond_dev->tx_queue_len = 0;
4551 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4552 bond_dev->priv_flags |= IFF_BONDING;
1da177e4
LT		 4553
4554 /* At first, we block adding VLANs. That's the only way to
4555 * prevent problems that occur when adding VLANs over an
4556 * empty bond. The block will be removed once non-challenged
4557 * slaves are enslaved.
4558 */
4559 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4560
932ff279 4561 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4562 * transmitting */
4563 bond_dev->features |= NETIF_F_LLTX;
4564
4565 /* By default, we declare the bond to be fully
4566 * VLAN hardware accelerated capable. Special
4567 * care is taken in the various xmit functions
4568 * when there are slaves that are not hw accel
4569 * capable
4570 */
4571 bond_dev->vlan_rx_register = bond_vlan_rx_register;
4572 bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid;
4573 bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid;
4574 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4575 NETIF_F_HW_VLAN_RX |
4576 NETIF_F_HW_VLAN_FILTER);
4577
4578#ifdef CONFIG_PROC_FS
4579 bond_create_proc_entry(bond);
4580#endif
1da177e4
LT		 4581 list_add_tail(&bond->bond_list, &bond_dev_list);
4582
4583 return 0;
4584}
4585
4586/* De-initialize device specific data.
4587 * Caller must hold rtnl_lock.
4588 */
c50b85d0 4589static void bond_deinit(struct net_device *bond_dev)
1da177e4
LT		 4590{
4591 struct bonding *bond = bond_dev->priv;
4592
4593 list_del(&bond->bond_list);
4594
4595#ifdef CONFIG_PROC_FS
4596 bond_remove_proc_entry(bond);
4597#endif
4598}
4599
fdaea7a9
JV		 4600static void bond_work_cancel_all(struct bonding *bond)
4601{
4602 write_lock_bh(&bond->lock);
4603 bond->kill_timers = 1;
4604 write_unlock_bh(&bond->lock);
4605
4606 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4607 cancel_delayed_work(&bond->mii_work);
4608
4609 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4610 cancel_delayed_work(&bond->arp_work);
4611
4612 if (bond->params.mode == BOND_MODE_ALB &&
4613 delayed_work_pending(&bond->alb_work))
4614 cancel_delayed_work(&bond->alb_work);
4615
4616 if (bond->params.mode == BOND_MODE_8023AD &&
4617 delayed_work_pending(&bond->ad_work))
4618 cancel_delayed_work(&bond->ad_work);
4619}
4620
1da177e4
LT		 4621/* Unregister and free all bond devices.
4622 * Caller must hold rtnl_lock.
4623 */
4624static void bond_free_all(void)
4625{
4626 struct bonding *bond, *nxt;
4627
4628 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4629 struct net_device *bond_dev = bond->dev;
4630
fdaea7a9 4631 bond_work_cancel_all(bond);
b9e40857 4632 netif_addr_lock_bh(bond_dev);
70298705 4633 bond_mc_list_destroy(bond);
b9e40857 4634 netif_addr_unlock_bh(bond_dev);
70298705 4635 /* Release the bonded slaves */
4636 bond_release_all(bond_dev);
92b41daa 4637 bond_destroy(bond);
1da177e4
LT		 4638 }
4639
4640#ifdef CONFIG_PROC_FS
4641 bond_destroy_proc_dir();
4642#endif
4643}
4644
4645/*------------------------- Module initialization ---------------------------*/
4646
4647/*
4648 * Convert string input module parms. Accept either the
ece95f7f
JV		 4649 * number of the mode or its string name. A bit complicated because
4650 * some mode names are substrings of other names, and calls from sysfs
4651 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4652 */
ece95f7f 4653int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl)
1da177e4 4654{
ece95f7f 4655 int mode = -1, i, rv;
a42e534f 4656 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
ece95f7f 4657
a42e534f
JV		 4658 for (p = (char *)buf; *p; p++)
4659 if (!(isdigit(*p) || isspace(*p)))
4660 break;
4661
4662 if (*p)
ece95f7f 4663 rv = sscanf(buf, "%20s", modestr);
a42e534f
JV		 4664 else
4665 rv = sscanf(buf, "%d", &mode);
4666
4667 if (!rv)
4668 return -1;
1da177e4
LT		 4669
4670 for (i = 0; tbl[i].modename; i++) {
ece95f7f
JV		 4671 if (mode == tbl[i].mode)
4672 return tbl[i].mode;
4673 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4674 return tbl[i].mode;
1da177e4
LT		 4675 }
4676
4677 return -1;
4678}
4679
4680static int bond_check_params(struct bond_params *params)
4681{
3915c1e8 4682 int arp_validate_value, fail_over_mac_value;
f5b2b966 4683
1da177e4
LT		 4684 /*
4685 * Convert string parameters.
4686 */
4687 if (mode) {
4688 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4689 if (bond_mode == -1) {
4690 printk(KERN_ERR DRV_NAME
4691 ": Error: Invalid bonding mode \"%s\"\n",
4692 mode == NULL ? "NULL" : mode);
4693 return -EINVAL;
4694 }
4695 }
4696
169a3e66
JV		 4697 if (xmit_hash_policy) {
4698 if ((bond_mode != BOND_MODE_XOR) &&
4699 (bond_mode != BOND_MODE_8023AD)) {
4700 printk(KERN_INFO DRV_NAME
4701 ": xor_mode param is irrelevant in mode %s\n",
4702 bond_mode_name(bond_mode));
4703 } else {
4704 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4705 xmit_hashtype_tbl);
4706 if (xmit_hashtype == -1) {
4707 printk(KERN_ERR DRV_NAME
4708 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4709 xmit_hash_policy == NULL ? "NULL" :
4710 xmit_hash_policy);
4711 return -EINVAL;
4712 }
4713 }
4714 }
4715
1da177e4
LT		 4716 if (lacp_rate) {
4717 if (bond_mode != BOND_MODE_8023AD) {
4718 printk(KERN_INFO DRV_NAME
4719 ": lacp_rate param is irrelevant in mode %s\n",
4720 bond_mode_name(bond_mode));
4721 } else {
4722 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4723 if (lacp_fast == -1) {
4724 printk(KERN_ERR DRV_NAME
4725 ": Error: Invalid lacp rate \"%s\"\n",
4726 lacp_rate == NULL ? "NULL" : lacp_rate);
4727 return -EINVAL;
4728 }
4729 }
4730 }
4731
b8a9787e 4732 if (max_bonds < 0 || max_bonds > INT_MAX) {
1da177e4
LT		 4733 printk(KERN_WARNING DRV_NAME
4734 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4735 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
b8a9787e 4736 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT		 4737 max_bonds = BOND_DEFAULT_MAX_BONDS;
4738 }
4739
4740 if (miimon < 0) {
4741 printk(KERN_WARNING DRV_NAME
4742 ": Warning: miimon module parameter (%d), "
4743 "not in range 0-%d, so it was reset to %d\n",
4744 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4745 miimon = BOND_LINK_MON_INTERV;
4746 }
4747
4748 if (updelay < 0) {
4749 printk(KERN_WARNING DRV_NAME
4750 ": Warning: updelay module parameter (%d), "
4751 "not in range 0-%d, so it was reset to 0\n",
4752 updelay, INT_MAX);
4753 updelay = 0;
4754 }
4755
4756 if (downdelay < 0) {
4757 printk(KERN_WARNING DRV_NAME
4758 ": Warning: downdelay module parameter (%d), "
4759 "not in range 0-%d, so it was reset to 0\n",
4760 downdelay, INT_MAX);
4761 downdelay = 0;
4762 }
4763
4764 if ((use_carrier != 0) && (use_carrier != 1)) {
4765 printk(KERN_WARNING DRV_NAME
4766 ": Warning: use_carrier module parameter (%d), "
4767 "not of valid value (0/1), so it was set to 1\n",
4768 use_carrier);
4769 use_carrier = 1;
4770 }
4771
7893b249
MS		 4772 if (num_grat_arp < 0 || num_grat_arp > 255) {
4773 printk(KERN_WARNING DRV_NAME
4774 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4775 "was reset to 1 \n", num_grat_arp);
4776 num_grat_arp = 1;
4777 }
4778
1da177e4
LT		 4779 /* reset values for 802.3ad */
4780 if (bond_mode == BOND_MODE_8023AD) {
4781 if (!miimon) {
4782 printk(KERN_WARNING DRV_NAME
4783 ": Warning: miimon must be specified, "
4784 "otherwise bonding will not detect link "
4785 "failure, speed and duplex which are "
4786 "essential for 802.3ad operation\n");
4787 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4788 miimon = 100;
4789 }
4790 }
4791
4792 /* reset values for TLB/ALB */
4793 if ((bond_mode == BOND_MODE_TLB) ||
4794 (bond_mode == BOND_MODE_ALB)) {
4795 if (!miimon) {
4796 printk(KERN_WARNING DRV_NAME
4797 ": Warning: miimon must be specified, "
4798 "otherwise bonding will not detect link "
4799 "failure and link speed which are essential "
4800 "for TLB/ALB load balancing\n");
4801 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4802 miimon = 100;
4803 }
4804 }
4805
4806 if (bond_mode == BOND_MODE_ALB) {
4807 printk(KERN_NOTICE DRV_NAME
4808 ": In ALB mode you might experience client "
4809 "disconnections upon reconnection of a link if the "
4810 "bonding module updelay parameter (%d msec) is "
4811 "incompatible with the forwarding delay time of the "
4812 "switch\n",
4813 updelay);
4814 }
4815
4816 if (!miimon) {
4817 if (updelay || downdelay) {
4818 /* just warn the user the up/down delay will have
4819 * no effect since miimon is zero...
4820 */
4821 printk(KERN_WARNING DRV_NAME
4822 ": Warning: miimon module parameter not set "
4823 "and updelay (%d) or downdelay (%d) module "
4824 "parameter is set; updelay and downdelay have "
4825 "no effect unless miimon is set\n",
4826 updelay, downdelay);
4827 }
4828 } else {
4829 /* don't allow arp monitoring */
4830 if (arp_interval) {
4831 printk(KERN_WARNING DRV_NAME
4832 ": Warning: miimon (%d) and arp_interval (%d) "
4833 "can't be used simultaneously, disabling ARP "
4834 "monitoring\n",
4835 miimon, arp_interval);
4836 arp_interval = 0;
4837 }
4838
4839 if ((updelay % miimon) != 0) {
4840 printk(KERN_WARNING DRV_NAME
4841 ": Warning: updelay (%d) is not a multiple "
4842 "of miimon (%d), updelay rounded to %d ms\n",
4843 updelay, miimon, (updelay / miimon) * miimon);
4844 }
4845
4846 updelay /= miimon;
4847
4848 if ((downdelay % miimon) != 0) {
4849 printk(KERN_WARNING DRV_NAME
4850 ": Warning: downdelay (%d) is not a multiple "
4851 "of miimon (%d), downdelay rounded to %d ms\n",
4852 downdelay, miimon,
4853 (downdelay / miimon) * miimon);
4854 }
4855
4856 downdelay /= miimon;
4857 }
4858
4859 if (arp_interval < 0) {
4860 printk(KERN_WARNING DRV_NAME
4861 ": Warning: arp_interval module parameter (%d) "
4862 ", not in range 0-%d, so it was reset to %d\n",
4863 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4864 arp_interval = BOND_LINK_ARP_INTERV;
4865 }
4866
4867 for (arp_ip_count = 0;
4868 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4869 arp_ip_count++) {
4870 /* not complete check, but should be good enough to
4871 catch mistakes */
4872 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4873 printk(KERN_WARNING DRV_NAME
4874 ": Warning: bad arp_ip_target module parameter "
4875 "(%s), ARP monitoring will not be performed\n",
4876 arp_ip_target[arp_ip_count]);
4877 arp_interval = 0;
4878 } else {
d3bb52b0 4879 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4880 arp_target[arp_ip_count] = ip;
4881 }
4882 }
4883
4884 if (arp_interval && !arp_ip_count) {
4885 /* don't allow arping if no arp_ip_target given... */
4886 printk(KERN_WARNING DRV_NAME
4887 ": Warning: arp_interval module parameter (%d) "
4888 "specified without providing an arp_ip_target "
4889 "parameter, arp_interval was reset to 0\n",
4890 arp_interval);
4891 arp_interval = 0;
4892 }
4893
f5b2b966
JV		 4894 if (arp_validate) {
4895 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4896 printk(KERN_ERR DRV_NAME
4897 ": arp_validate only supported in active-backup mode\n");
4898 return -EINVAL;
4899 }
4900 if (!arp_interval) {
4901 printk(KERN_ERR DRV_NAME
4902 ": arp_validate requires arp_interval\n");
4903 return -EINVAL;
4904 }
4905
4906 arp_validate_value = bond_parse_parm(arp_validate,
4907 arp_validate_tbl);
4908 if (arp_validate_value == -1) {
4909 printk(KERN_ERR DRV_NAME
4910 ": Error: invalid arp_validate \"%s\"\n",
4911 arp_validate == NULL ? "NULL" : arp_validate);
4912 return -EINVAL;
4913 }
4914 } else
4915 arp_validate_value = 0;
4916
1da177e4
LT		 4917 if (miimon) {
4918 printk(KERN_INFO DRV_NAME
4919 ": MII link monitoring set to %d ms\n",
4920 miimon);
4921 } else if (arp_interval) {
4922 int i;
4923
4924 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 4925 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
4926 arp_interval,
4927 arp_validate_tbl[arp_validate_value].modename,
4928 arp_ip_count);
1da177e4
LT		 4929
4930 for (i = 0; i < arp_ip_count; i++)
4931 printk (" %s", arp_ip_target[i]);
4932
4933 printk("\n");
4934
b8a9787e 4935 } else if (max_bonds) {
1da177e4
LT		 4936 /* miimon and arp_interval not set, we need one so things
4937 * work as expected, see bonding.txt for details
4938 */
4939 printk(KERN_WARNING DRV_NAME
4940 ": Warning: either miimon or arp_interval and "
4941 "arp_ip_target module parameters must be specified, "
4942 "otherwise bonding will not detect link failures! see "
4943 "bonding.txt for details.\n");
4944 }
4945
4946 if (primary && !USES_PRIMARY(bond_mode)) {
4947 /* currently, using a primary only makes sense
4948 * in active backup, TLB or ALB modes
4949 */
4950 printk(KERN_WARNING DRV_NAME
4951 ": Warning: %s primary device specified but has no "
4952 "effect in %s mode\n",
4953 primary, bond_mode_name(bond_mode));
4954 primary = NULL;
4955 }
4956
3915c1e8
JV		 4957 if (fail_over_mac) {
4958 fail_over_mac_value = bond_parse_parm(fail_over_mac,
4959 fail_over_mac_tbl);
4960 if (fail_over_mac_value == -1) {
4961 printk(KERN_ERR DRV_NAME
4962 ": Error: invalid fail_over_mac \"%s\"\n",
4963 arp_validate == NULL ? "NULL" : arp_validate);
4964 return -EINVAL;
4965 }
4966
4967 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
4968 printk(KERN_WARNING DRV_NAME
4969 ": Warning: fail_over_mac only affects "
4970 "active-backup mode.\n");
4971 } else {
4972 fail_over_mac_value = BOND_FOM_NONE;
4973 }
dd957c57 4974
1da177e4
LT		 4975 /* fill params struct with the proper values */
4976 params->mode = bond_mode;
169a3e66 4977 params->xmit_policy = xmit_hashtype;
1da177e4 4978 params->miimon = miimon;
7893b249 4979 params->num_grat_arp = num_grat_arp;
1da177e4 4980 params->arp_interval = arp_interval;
f5b2b966 4981 params->arp_validate = arp_validate_value;
1da177e4
LT		 4982 params->updelay = updelay;
4983 params->downdelay = downdelay;
4984 params->use_carrier = use_carrier;
4985 params->lacp_fast = lacp_fast;
4986 params->primary[0] = 0;
3915c1e8 4987 params->fail_over_mac = fail_over_mac_value;
1da177e4
LT		 4988
4989 if (primary) {
4990 strncpy(params->primary, primary, IFNAMSIZ);
4991 params->primary[IFNAMSIZ - 1] = 0;
4992 }
4993
4994 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
4995
4996 return 0;
4997}
4998
0daa2303 4999static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 5000static struct lock_class_key bonding_netdev_addr_lock_key;
0daa2303 5001
e8a0464c
DM		 5002static void bond_set_lockdep_class_one(struct net_device *dev,
5003 struct netdev_queue *txq,
5004 void *_unused)
c773e847
DM		 5005{
5006 lockdep_set_class(&txq->_xmit_lock,
5007 &bonding_netdev_xmit_lock_key);
5008}
5009
5010static void bond_set_lockdep_class(struct net_device *dev)
5011{
cf508b12
DM		 5012 lockdep_set_class(&dev->addr_list_lock,
5013 &bonding_netdev_addr_lock_key);
e8a0464c 5014 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
c773e847
DM		 5015}
5016
dfe60397 5017/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 5018 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 5019 * Caller must NOT hold rtnl_lock; we need to release it here before we
5020 * set up our sysfs entries.
5021 */
0dd646fe 5022int bond_create(char *name, struct bond_params *params)
dfe60397
MW		 5023{
5024 struct net_device *bond_dev;
0883beca 5025 struct bonding *bond;
dfe60397
MW		 5026 int res;
5027
5028 rtnl_lock();
027ea041
JV		 5029 down_write(&bonding_rwsem);
5030
5031 /* Check to see if the bond already exists. */
4fe4763c 5032 if (name) {
0883beca 5033 list_for_each_entry(bond, &bond_dev_list, bond_list)
4fe4763c
JV		 5034 if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
5035 printk(KERN_ERR DRV_NAME
027ea041 5036 ": cannot add bond %s; it already exists\n",
4fe4763c
JV		 5037 name);
5038 res = -EPERM;
5039 goto out_rtnl;
5040 }
5041 }
027ea041 5042
e4b91c48
JV		 5043 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5044 ether_setup);
dfe60397
MW		 5045 if (!bond_dev) {
5046 printk(KERN_ERR DRV_NAME
5047 ": %s: eek! can't alloc netdev!\n",
5048 name);
5049 res = -ENOMEM;
5050 goto out_rtnl;
5051 }
5052
e4b91c48
JV		 5053 if (!name) {
5054 res = dev_alloc_name(bond_dev, "bond%d");
5055 if (res < 0)
5056 goto out_netdev;
5057 }
5058
dfe60397
MW		 5059 /* bond_init() must be called after dev_alloc_name() (for the
5060 * /proc files), but before register_netdevice(), because we
5061 * need to set function pointers.
5062 */
5063
5064 res = bond_init(bond_dev, params);
5065 if (res < 0) {
5066 goto out_netdev;
5067 }
5068
dfe60397
MW		 5069 res = register_netdevice(bond_dev);
5070 if (res < 0) {
5071 goto out_bond;
5072 }
0daa2303 5073
c773e847 5074 bond_set_lockdep_class(bond_dev);
0daa2303 5075
ff59c456
JV		 5076 netif_carrier_off(bond_dev);
5077
027ea041 5078 up_write(&bonding_rwsem);
dfe60397 5079 rtnl_unlock(); /* allows sysfs registration of net device */
b76cdba9 5080 res = bond_create_sysfs_entry(bond_dev->priv);
09c89279
JV		 5081 if (res < 0) {
5082 rtnl_lock();
027ea041 5083 down_write(&bonding_rwsem);
822973ba
PE		 5084 bond_deinit(bond_dev);
5085 unregister_netdevice(bond_dev);
5086 goto out_rtnl;
09c89279
JV		 5087 }
5088
5089 return 0;
5090
dfe60397
MW		 5091out_bond:
5092 bond_deinit(bond_dev);
5093out_netdev:
5094 free_netdev(bond_dev);
5095out_rtnl:
027ea041 5096 up_write(&bonding_rwsem);
dfe60397 5097 rtnl_unlock();
dfe60397
MW		 5098 return res;
5099}
5100
1da177e4
LT		 5101static int __init bonding_init(void)
5102{
1da177e4
LT		 5103 int i;
5104 int res;
0883beca 5105 struct bonding *bond;
1da177e4
LT		 5106
5107 printk(KERN_INFO "%s", version);
5108
dfe60397 5109 res = bond_check_params(&bonding_defaults);
1da177e4 5110 if (res) {
dfe60397 5111 goto out;
1da177e4
LT		 5112 }
5113
1da177e4
LT		 5114#ifdef CONFIG_PROC_FS
5115 bond_create_proc_dir();
5116#endif
027ea041
JV		 5117
5118 init_rwsem(&bonding_rwsem);
5119
1da177e4 5120 for (i = 0; i < max_bonds; i++) {
0dd646fe 5121 res = bond_create(NULL, &bonding_defaults);
dfe60397
MW		 5122 if (res)
5123 goto err;
1da177e4
LT		 5124 }
5125
b76cdba9
MW		 5126 res = bond_create_sysfs();
5127 if (res)
5128 goto err;
5129
1da177e4 5130 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5131 register_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 5132
dfe60397
MW		 5133 goto out;
5134err:
0883beca 5135 list_for_each_entry(bond, &bond_dev_list, bond_list) {
1b76b316
JV		 5136 bond_work_cancel_all(bond);
5137 destroy_workqueue(bond->wq);
5138 }
5139
ae68c398
PE		 5140 bond_destroy_sysfs();
5141
40abc270 5142 rtnl_lock();
1da177e4 5143 bond_free_all();
1da177e4 5144 rtnl_unlock();
dfe60397 5145out:
1da177e4 5146 return res;
dfe60397 5147
1da177e4
LT		 5148}
5149
5150static void __exit bonding_exit(void)
5151{
5152 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5153 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
1da177e4 5154
ae68c398
PE		 5155 bond_destroy_sysfs();
5156
1da177e4
LT		 5157 rtnl_lock();
5158 bond_free_all();
5159 rtnl_unlock();
5160}
5161
5162module_init(bonding_init);
5163module_exit(bonding_exit);
5164MODULE_LICENSE("GPL");
5165MODULE_VERSION(DRV_VERSION);
5166MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5167MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5168MODULE_SUPPORTED_DEVICE("most ethernet devices");
5169
5170/*
5171 * Local variables:
5172 * c-indent-level: 8
5173 * c-basic-offset: 8
5174 * tab-width: 8
5175 * End:
5176 */
5177
Clone of davem's net-next-2.6 tree