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bnx2: Fix problem of using wrong IRQ handler.
[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
1da177e4
LT		 34#include <linux/kernel.h>
35#include <linux/module.h>
1da177e4
LT		 36#include <linux/types.h>
37#include <linux/fcntl.h>
38#include <linux/interrupt.h>
39#include <linux/ptrace.h>
40#include <linux/ioport.h>
41#include <linux/in.h>
169a3e66 42#include <net/ip.h>
1da177e4 43#include <linux/ip.h>
169a3e66
JV		 44#include <linux/tcp.h>
45#include <linux/udp.h>
1da177e4
LT		 46#include <linux/slab.h>
47#include <linux/string.h>
48#include <linux/init.h>
49#include <linux/timer.h>
50#include <linux/socket.h>
51#include <linux/ctype.h>
52#include <linux/inet.h>
53#include <linux/bitops.h>
54#include <asm/system.h>
55#include <asm/io.h>
56#include <asm/dma.h>
57#include <asm/uaccess.h>
58#include <linux/errno.h>
59#include <linux/netdevice.h>
60#include <linux/inetdevice.h>
a816c7c7 61#include <linux/igmp.h>
1da177e4
LT		 62#include <linux/etherdevice.h>
63#include <linux/skbuff.h>
64#include <net/sock.h>
65#include <linux/rtnetlink.h>
66#include <linux/proc_fs.h>
67#include <linux/seq_file.h>
68#include <linux/smp.h>
69#include <linux/if_ether.h>
70#include <net/arp.h>
71#include <linux/mii.h>
72#include <linux/ethtool.h>
73#include <linux/if_vlan.h>
74#include <linux/if_bonding.h>
b63bb739 75#include <linux/jiffies.h>
c3ade5ca 76#include <net/route.h>
457c4cbc 77#include <net/net_namespace.h>
1da177e4
LT		 78#include "bonding.h"
79#include "bond_3ad.h"
80#include "bond_alb.h"
81
82/*---------------------------- Module parameters ----------------------------*/
83
84/* monitor all links that often (in milliseconds). <=0 disables monitoring */
85#define BOND_LINK_MON_INTERV 0
86#define BOND_LINK_ARP_INTERV 0
87
88static int max_bonds = BOND_DEFAULT_MAX_BONDS;
7893b249 89static int num_grat_arp = 1;
305d552a 90static int num_unsol_na = 1;
1da177e4
LT		 91static int miimon = BOND_LINK_MON_INTERV;
92static int updelay = 0;
93static int downdelay = 0;
94static int use_carrier = 1;
95static char *mode = NULL;
96static char *primary = NULL;
97static char *lacp_rate = NULL;
fd989c83 98static char *ad_select = 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");
305d552a
BH		 110module_param(num_unsol_na, int, 0644);
111MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
1da177e4
LT		 112module_param(miimon, int, 0);
113MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
114module_param(updelay, int, 0);
115MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
116module_param(downdelay, int, 0);
2ac47660
MW		 117MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
118 "in milliseconds");
1da177e4 119module_param(use_carrier, int, 0);
2ac47660
MW		 120MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
121 "0 for off, 1 for on (default)");
1da177e4 122module_param(mode, charp, 0);
2ac47660
MW		 123MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
124 "1 for active-backup, 2 for balance-xor, "
125 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
126 "6 for balance-alb");
1da177e4
LT		 127module_param(primary, charp, 0);
128MODULE_PARM_DESC(primary, "Primary network device to use");
129module_param(lacp_rate, charp, 0);
2ac47660
MW		 130MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
131 "(slow/fast)");
fd989c83
JV		 132module_param(ad_select, charp, 0);
133MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
169a3e66 134module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 135MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
136 ", 1 for layer 3+4");
1da177e4
LT		 137module_param(arp_interval, int, 0);
138MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
139module_param_array(arp_ip_target, charp, NULL, 0);
140MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV		 141module_param(arp_validate, charp, 0);
142MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
3915c1e8
JV		 143module_param(fail_over_mac, charp, 0);
144MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
1da177e4
LT		 145
146/*----------------------------- Global variables ----------------------------*/
147
f71e1309 148static const char * const version =
1da177e4
LT		 149 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
150
12479f9a 151LIST_HEAD(bond_dev_list);
1da177e4
LT		 152
153#ifdef CONFIG_PROC_FS
154static struct proc_dir_entry *bond_proc_dir = NULL;
155#endif
156
d3bb52b0 157static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ;
1da177e4 158static int arp_ip_count = 0;
1da177e4 159static int bond_mode = BOND_MODE_ROUNDROBIN;
169a3e66 160static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2;
1da177e4 161static int lacp_fast = 0;
217df670 162
1da177e4 163
e97fd7c6 164const struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 165{ "slow", AD_LACP_SLOW},
166{ "fast", AD_LACP_FAST},
167{ NULL, -1},
168};
169
e97fd7c6 170const struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 171{ "balance-rr", BOND_MODE_ROUNDROBIN},
172{ "active-backup", BOND_MODE_ACTIVEBACKUP},
173{ "balance-xor", BOND_MODE_XOR},
174{ "broadcast", BOND_MODE_BROADCAST},
175{ "802.3ad", BOND_MODE_8023AD},
176{ "balance-tlb", BOND_MODE_TLB},
177{ "balance-alb", BOND_MODE_ALB},
178{ NULL, -1},
179};
180
e97fd7c6 181const struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 182{ "layer2", BOND_XMIT_POLICY_LAYER2},
183{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
6f6652be 184{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
169a3e66
JV		 185{ NULL, -1},
186};
187
e97fd7c6 188const struct bond_parm_tbl arp_validate_tbl[] = {
f5b2b966
JV		 189{ "none", BOND_ARP_VALIDATE_NONE},
190{ "active", BOND_ARP_VALIDATE_ACTIVE},
191{ "backup", BOND_ARP_VALIDATE_BACKUP},
192{ "all", BOND_ARP_VALIDATE_ALL},
193{ NULL, -1},
194};
195
e97fd7c6 196const struct bond_parm_tbl fail_over_mac_tbl[] = {
3915c1e8
JV		 197{ "none", BOND_FOM_NONE},
198{ "active", BOND_FOM_ACTIVE},
199{ "follow", BOND_FOM_FOLLOW},
200{ NULL, -1},
201};
202
fd989c83
JV		 203struct bond_parm_tbl ad_select_tbl[] = {
204{ "stable", BOND_AD_STABLE},
205{ "bandwidth", BOND_AD_BANDWIDTH},
206{ "count", BOND_AD_COUNT},
207{ NULL, -1},
208};
209
1da177e4
LT		 210/*-------------------------- Forward declarations ---------------------------*/
211
c3ade5ca 212static void bond_send_gratuitous_arp(struct bonding *bond);
c50b85d0 213static void bond_deinit(struct net_device *bond_dev);
1da177e4
LT		 214
215/*---------------------------- General routines -----------------------------*/
216
4ad072c9 217static const char *bond_mode_name(int mode)
1da177e4 218{
77afc92b
HE		 219 static const char *names[] = {
220 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
221 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
222 [BOND_MODE_XOR] = "load balancing (xor)",
223 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
224 [BOND_MODE_8023AD]= "IEEE 802.3ad Dynamic link aggregation",
225 [BOND_MODE_TLB] = "transmit load balancing",
226 [BOND_MODE_ALB] = "adaptive load balancing",
227 };
228
229 if (mode < 0 || mode > BOND_MODE_ALB)
1da177e4 230 return "unknown";
77afc92b
HE		 231
232 return names[mode];
1da177e4
LT		 233}
234
235/*---------------------------------- VLAN -----------------------------------*/
236
237/**
238 * bond_add_vlan - add a new vlan id on bond
239 * @bond: bond that got the notification
240 * @vlan_id: the vlan id to add
241 *
242 * Returns -ENOMEM if allocation failed.
243 */
244static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
245{
246 struct vlan_entry *vlan;
247
5a03cdb7 248 pr_debug("bond: %s, vlan id %d\n",
1da177e4
LT		 249 (bond ? bond->dev->name: "None"), vlan_id);
250
305d552a 251 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
1da177e4
LT		 252 if (!vlan) {
253 return -ENOMEM;
254 }
255
256 INIT_LIST_HEAD(&vlan->vlan_list);
257 vlan->vlan_id = vlan_id;
258
259 write_lock_bh(&bond->lock);
260
261 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
262
263 write_unlock_bh(&bond->lock);
264
5a03cdb7 265 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
1da177e4
LT		 266
267 return 0;
268}
269
270/**
271 * bond_del_vlan - delete a vlan id from bond
272 * @bond: bond that got the notification
273 * @vlan_id: the vlan id to delete
274 *
275 * returns -ENODEV if @vlan_id was not found in @bond.
276 */
277static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
278{
0883beca 279 struct vlan_entry *vlan;
1da177e4
LT		 280 int res = -ENODEV;
281
5a03cdb7 282 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
1da177e4
LT		 283
284 write_lock_bh(&bond->lock);
285
0883beca 286 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
1da177e4
LT		 287 if (vlan->vlan_id == vlan_id) {
288 list_del(&vlan->vlan_list);
289
58402054 290 if (bond_is_lb(bond))
1da177e4 291 bond_alb_clear_vlan(bond, vlan_id);
1da177e4 292
5a03cdb7 293 pr_debug("removed VLAN ID %d from bond %s\n", vlan_id,
1da177e4
LT		 294 bond->dev->name);
295
296 kfree(vlan);
297
298 if (list_empty(&bond->vlan_list) &&
299 (bond->slave_cnt == 0)) {
300 /* Last VLAN removed and no slaves, so
301 * restore block on adding VLANs. This will
302 * be removed once new slaves that are not
303 * VLAN challenged will be added.
304 */
305 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
306 }
307
308 res = 0;
309 goto out;
310 }
311 }
312
5a03cdb7 313 pr_debug("couldn't find VLAN ID %d in bond %s\n", vlan_id,
1da177e4
LT		 314 bond->dev->name);
315
316out:
317 write_unlock_bh(&bond->lock);
318 return res;
319}
320
321/**
322 * bond_has_challenged_slaves
323 * @bond: the bond we're working on
324 *
325 * Searches the slave list. Returns 1 if a vlan challenged slave
326 * was found, 0 otherwise.
327 *
328 * Assumes bond->lock is held.
329 */
330static int bond_has_challenged_slaves(struct bonding *bond)
331{
332 struct slave *slave;
333 int i;
334
335 bond_for_each_slave(bond, slave, i) {
336 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 337 pr_debug("found VLAN challenged slave - %s\n",
1da177e4
LT		 338 slave->dev->name);
339 return 1;
340 }
341 }
342
5a03cdb7 343 pr_debug("no VLAN challenged slaves found\n");
1da177e4
LT		 344 return 0;
345}
346
347/**
348 * bond_next_vlan - safely skip to the next item in the vlans list.
349 * @bond: the bond we're working on
350 * @curr: item we're advancing from
351 *
352 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
353 * or @curr->next otherwise (even if it is @curr itself again).
354 *
355 * Caller must hold bond->lock
356 */
357struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
358{
359 struct vlan_entry *next, *last;
360
361 if (list_empty(&bond->vlan_list)) {
362 return NULL;
363 }
364
365 if (!curr) {
366 next = list_entry(bond->vlan_list.next,
367 struct vlan_entry, vlan_list);
368 } else {
369 last = list_entry(bond->vlan_list.prev,
370 struct vlan_entry, vlan_list);
371 if (last == curr) {
372 next = list_entry(bond->vlan_list.next,
373 struct vlan_entry, vlan_list);
374 } else {
375 next = list_entry(curr->vlan_list.next,
376 struct vlan_entry, vlan_list);
377 }
378 }
379
380 return next;
381}
382
383/**
384 * bond_dev_queue_xmit - Prepare skb for xmit.
385 *
386 * @bond: bond device that got this skb for tx.
387 * @skb: hw accel VLAN tagged skb to transmit
388 * @slave_dev: slave that is supposed to xmit this skbuff
389 *
390 * When the bond gets an skb to transmit that is
391 * already hardware accelerated VLAN tagged, and it
392 * needs to relay this skb to a slave that is not
393 * hw accel capable, the skb needs to be "unaccelerated",
394 * i.e. strip the hwaccel tag and re-insert it as part
395 * of the payload.
396 */
397int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev)
398{
966bc6f4 399 unsigned short uninitialized_var(vlan_id);
1da177e4
LT		 400
401 if (!list_empty(&bond->vlan_list) &&
402 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
403 vlan_get_tag(skb, &vlan_id) == 0) {
404 skb->dev = slave_dev;
405 skb = vlan_put_tag(skb, vlan_id);
406 if (!skb) {
407 /* vlan_put_tag() frees the skb in case of error,
408 * so return success here so the calling functions
409 * won't attempt to free is again.
410 */
411 return 0;
412 }
413 } else {
414 skb->dev = slave_dev;
415 }
416
417 skb->priority = 1;
418 dev_queue_xmit(skb);
419
420 return 0;
421}
422
423/*
424 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
425 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
426 * lock because:
427 * a. This operation is performed in IOCTL context,
428 * b. The operation is protected by the RTNL semaphore in the 8021q code,
429 * c. Holding a lock with BH disabled while directly calling a base driver
430 * entry point is generally a BAD idea.
431 *
432 * The design of synchronization/protection for this operation in the 8021q
433 * module is good for one or more VLAN devices over a single physical device
434 * and cannot be extended for a teaming solution like bonding, so there is a
435 * potential race condition here where a net device from the vlan group might
436 * be referenced (either by a base driver or the 8021q code) while it is being
437 * removed from the system. However, it turns out we're not making matters
438 * worse, and if it works for regular VLAN usage it will work here too.
439*/
440
441/**
442 * bond_vlan_rx_register - Propagates registration to slaves
443 * @bond_dev: bonding net device that got called
444 * @grp: vlan group being registered
445 */
446static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp)
447{
454d7c9b 448 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 449 struct slave *slave;
450 int i;
451
452 bond->vlgrp = grp;
453
454 bond_for_each_slave(bond, slave, i) {
455 struct net_device *slave_dev = slave->dev;
eb7cc59a 456 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 457
458 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH		 459 slave_ops->ndo_vlan_rx_register) {
460 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
1da177e4
LT		 461 }
462 }
463}
464
465/**
466 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
467 * @bond_dev: bonding net device that got called
468 * @vid: vlan id being added
469 */
470static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
471{
454d7c9b 472 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 473 struct slave *slave;
474 int i, res;
475
476 bond_for_each_slave(bond, slave, i) {
477 struct net_device *slave_dev = slave->dev;
eb7cc59a 478 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 479
480 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a
SH		 481 slave_ops->ndo_vlan_rx_add_vid) {
482 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
1da177e4
LT		 483 }
484 }
485
486 res = bond_add_vlan(bond, vid);
487 if (res) {
488 printk(KERN_ERR DRV_NAME
4e0952c7 489 ": %s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 490 bond_dev->name, vid);
491 }
492}
493
494/**
495 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
496 * @bond_dev: bonding net device that got called
497 * @vid: vlan id being removed
498 */
499static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
500{
454d7c9b 501 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 502 struct slave *slave;
503 struct net_device *vlan_dev;
504 int i, res;
505
506 bond_for_each_slave(bond, slave, i) {
507 struct net_device *slave_dev = slave->dev;
eb7cc59a 508 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 509
510 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a 511 slave_ops->ndo_vlan_rx_kill_vid) {
1da177e4
LT		 512 /* Save and then restore vlan_dev in the grp array,
513 * since the slave's driver might clear it.
514 */
5c15bdec 515 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
eb7cc59a 516 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 517 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT		 518 }
519 }
520
521 res = bond_del_vlan(bond, vid);
522 if (res) {
523 printk(KERN_ERR DRV_NAME
4e0952c7 524 ": %s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 525 bond_dev->name, vid);
526 }
527}
528
529static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
530{
531 struct vlan_entry *vlan;
eb7cc59a 532 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 533
534 write_lock_bh(&bond->lock);
535
eb7cc59a 536 if (list_empty(&bond->vlan_list))
1da177e4 537 goto out;
1da177e4
LT		 538
539 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH		 540 slave_ops->ndo_vlan_rx_register)
541 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
1da177e4
LT		 542
543 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 544 !(slave_ops->ndo_vlan_rx_add_vid))
1da177e4 545 goto out;
1da177e4 546
eb7cc59a
SH		 547 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
548 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
1da177e4
LT		 549
550out:
551 write_unlock_bh(&bond->lock);
552}
553
554static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev)
555{
eb7cc59a 556 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 557 struct vlan_entry *vlan;
558 struct net_device *vlan_dev;
559
560 write_lock_bh(&bond->lock);
561
eb7cc59a 562 if (list_empty(&bond->vlan_list))
1da177e4 563 goto out;
1da177e4
LT		 564
565 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 566 !(slave_ops->ndo_vlan_rx_kill_vid))
1da177e4 567 goto unreg;
1da177e4
LT		 568
569 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
570 /* Save and then restore vlan_dev in the grp array,
571 * since the slave's driver might clear it.
572 */
5c15bdec 573 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
eb7cc59a 574 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 575 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT		 576 }
577
578unreg:
579 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH		 580 slave_ops->ndo_vlan_rx_register)
581 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
1da177e4
LT		 582
583out:
584 write_unlock_bh(&bond->lock);
585}
586
587/*------------------------------- Link status -------------------------------*/
588
ff59c456
JV		 589/*
590 * Set the carrier state for the master according to the state of its
591 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
592 * do special 802.3ad magic.
593 *
594 * Returns zero if carrier state does not change, nonzero if it does.
595 */
596static int bond_set_carrier(struct bonding *bond)
597{
598 struct slave *slave;
599 int i;
600
601 if (bond->slave_cnt == 0)
602 goto down;
603
604 if (bond->params.mode == BOND_MODE_8023AD)
605 return bond_3ad_set_carrier(bond);
606
607 bond_for_each_slave(bond, slave, i) {
608 if (slave->link == BOND_LINK_UP) {
609 if (!netif_carrier_ok(bond->dev)) {
610 netif_carrier_on(bond->dev);
611 return 1;
612 }
613 return 0;
614 }
615 }
616
617down:
618 if (netif_carrier_ok(bond->dev)) {
619 netif_carrier_off(bond->dev);
620 return 1;
621 }
622 return 0;
623}
624
1da177e4
LT		 625/*
626 * Get link speed and duplex from the slave's base driver
627 * using ethtool. If for some reason the call fails or the
628 * values are invalid, fake speed and duplex to 100/Full
629 * and return error.
630 */
631static int bond_update_speed_duplex(struct slave *slave)
632{
633 struct net_device *slave_dev = slave->dev;
1da177e4 634 struct ethtool_cmd etool;
61a44b9c 635 int res;
1da177e4
LT		 636
637 /* Fake speed and duplex */
638 slave->speed = SPEED_100;
639 slave->duplex = DUPLEX_FULL;
640
61a44b9c
MW		 641 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
642 return -1;
1da177e4 643
61a44b9c
MW		 644 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
645 if (res < 0)
1da177e4 646 return -1;
1da177e4 647
1da177e4
LT		 648 switch (etool.speed) {
649 case SPEED_10:
650 case SPEED_100:
651 case SPEED_1000:
94dbffd5 652 case SPEED_10000:
1da177e4
LT		 653 break;
654 default:
655 return -1;
656 }
657
658 switch (etool.duplex) {
659 case DUPLEX_FULL:
660 case DUPLEX_HALF:
661 break;
662 default:
663 return -1;
664 }
665
666 slave->speed = etool.speed;
667 slave->duplex = etool.duplex;
668
669 return 0;
670}
671
672/*
673 * if <dev> supports MII link status reporting, check its link status.
674 *
675 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
676 * depening upon the setting of the use_carrier parameter.
677 *
678 * Return either BMSR_LSTATUS, meaning that the link is up (or we
679 * can't tell and just pretend it is), or 0, meaning that the link is
680 * down.
681 *
682 * If reporting is non-zero, instead of faking link up, return -1 if
683 * both ETHTOOL and MII ioctls fail (meaning the device does not
684 * support them). If use_carrier is set, return whatever it says.
685 * It'd be nice if there was a good way to tell if a driver supports
686 * netif_carrier, but there really isn't.
687 */
688static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting)
689{
eb7cc59a 690 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 691 static int (* ioctl)(struct net_device *, struct ifreq *, int);
692 struct ifreq ifr;
693 struct mii_ioctl_data *mii;
1da177e4 694
eb7cc59a 695 if (bond->params.use_carrier)
1da177e4 696 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
1da177e4 697
eb7cc59a 698 ioctl = slave_ops->ndo_do_ioctl;
1da177e4
LT		 699 if (ioctl) {
700 /* TODO: set pointer to correct ioctl on a per team member */
701 /* bases to make this more efficient. that is, once */
702 /* we determine the correct ioctl, we will always */
703 /* call it and not the others for that team */
704 /* member. */
705
706 /*
707 * We cannot assume that SIOCGMIIPHY will also read a
708 * register; not all network drivers (e.g., e100)
709 * support that.
710 */
711
712 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
713 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
714 mii = if_mii(&ifr);
715 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
716 mii->reg_num = MII_BMSR;
717 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) {
718 return (mii->val_out & BMSR_LSTATUS);
719 }
720 }
721 }
722
61a44b9c
MW		 723 /*
724 * Some drivers cache ETHTOOL_GLINK for a period of time so we only
725 * attempt to get link status from it if the above MII ioctls fail.
726 */
1da177e4
LT		 727 if (slave_dev->ethtool_ops) {
728 if (slave_dev->ethtool_ops->get_link) {
729 u32 link;
730
731 link = slave_dev->ethtool_ops->get_link(slave_dev);
732
733 return link ? BMSR_LSTATUS : 0;
734 }
735 }
736
1da177e4
LT		 737 /*
738 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 739 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT		 740 * cannot report link status). If not reporting, pretend
741 * we're ok.
742 */
743 return (reporting ? -1 : BMSR_LSTATUS);
744}
745
746/*----------------------------- Multicast list ------------------------------*/
747
748/*
749 * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise
750 */
751static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2)
752{
753 return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 &&
754 dmi1->dmi_addrlen == dmi2->dmi_addrlen;
755}
756
757/*
758 * returns dmi entry if found, NULL otherwise
759 */
760static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list)
761{
762 struct dev_mc_list *idmi;
763
764 for (idmi = mc_list; idmi; idmi = idmi->next) {
765 if (bond_is_dmi_same(dmi, idmi)) {
766 return idmi;
767 }
768 }
769
770 return NULL;
771}
772
773/*
774 * Push the promiscuity flag down to appropriate slaves
775 */
7e1a1ac1 776static int bond_set_promiscuity(struct bonding *bond, int inc)
1da177e4 777{
7e1a1ac1 778 int err = 0;
1da177e4
LT		 779 if (USES_PRIMARY(bond->params.mode)) {
780 /* write lock already acquired */
781 if (bond->curr_active_slave) {
7e1a1ac1
WC		 782 err = dev_set_promiscuity(bond->curr_active_slave->dev,
783 inc);
1da177e4
LT		 784 }
785 } else {
786 struct slave *slave;
787 int i;
788 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 789 err = dev_set_promiscuity(slave->dev, inc);
790 if (err)
791 return err;
1da177e4
LT		 792 }
793 }
7e1a1ac1 794 return err;
1da177e4
LT		 795}
796
797/*
798 * Push the allmulti flag down to all slaves
799 */
7e1a1ac1 800static int bond_set_allmulti(struct bonding *bond, int inc)
1da177e4 801{
7e1a1ac1 802 int err = 0;
1da177e4
LT		 803 if (USES_PRIMARY(bond->params.mode)) {
804 /* write lock already acquired */
805 if (bond->curr_active_slave) {
7e1a1ac1
WC		 806 err = dev_set_allmulti(bond->curr_active_slave->dev,
807 inc);
1da177e4
LT		 808 }
809 } else {
810 struct slave *slave;
811 int i;
812 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 813 err = dev_set_allmulti(slave->dev, inc);
814 if (err)
815 return err;
1da177e4
LT		 816 }
817 }
7e1a1ac1 818 return err;
1da177e4
LT		 819}
820
821/*
822 * Add a Multicast address to slaves
823 * according to mode
824 */
825static void bond_mc_add(struct bonding *bond, void *addr, int alen)
826{
827 if (USES_PRIMARY(bond->params.mode)) {
828 /* write lock already acquired */
829 if (bond->curr_active_slave) {
830 dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0);
831 }
832 } else {
833 struct slave *slave;
834 int i;
835 bond_for_each_slave(bond, slave, i) {
836 dev_mc_add(slave->dev, addr, alen, 0);
837 }
838 }
839}
840
841/*
842 * Remove a multicast address from slave
843 * according to mode
844 */
845static void bond_mc_delete(struct bonding *bond, void *addr, int alen)
846{
847 if (USES_PRIMARY(bond->params.mode)) {
848 /* write lock already acquired */
849 if (bond->curr_active_slave) {
850 dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0);
851 }
852 } else {
853 struct slave *slave;
854 int i;
855 bond_for_each_slave(bond, slave, i) {
856 dev_mc_delete(slave->dev, addr, alen, 0);
857 }
858 }
859}
860
a816c7c7
JV		 861
862/*
863 * Retrieve the list of registered multicast addresses for the bonding
864 * device and retransmit an IGMP JOIN request to the current active
865 * slave.
866 */
867static void bond_resend_igmp_join_requests(struct bonding *bond)
868{
869 struct in_device *in_dev;
870 struct ip_mc_list *im;
871
872 rcu_read_lock();
873 in_dev = __in_dev_get_rcu(bond->dev);
874 if (in_dev) {
875 for (im = in_dev->mc_list; im; im = im->next) {
876 ip_mc_rejoin_group(im);
877 }
878 }
879
880 rcu_read_unlock();
881}
882
1da177e4
LT		 883/*
884 * Totally destroys the mc_list in bond
885 */
886static void bond_mc_list_destroy(struct bonding *bond)
887{
888 struct dev_mc_list *dmi;
889
890 dmi = bond->mc_list;
891 while (dmi) {
892 bond->mc_list = dmi->next;
893 kfree(dmi);
894 dmi = bond->mc_list;
895 }
a816c7c7 896 bond->mc_list = NULL;
1da177e4
LT		 897}
898
899/*
900 * Copy all the Multicast addresses from src to the bonding device dst
901 */
de54f390 902static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond,
dd0fc66f 903 gfp_t gfp_flag)
1da177e4
LT		 904{
905 struct dev_mc_list *dmi, *new_dmi;
906
907 for (dmi = mc_list; dmi; dmi = dmi->next) {
de54f390 908 new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag);
1da177e4
LT		 909
910 if (!new_dmi) {
911 /* FIXME: Potential memory leak !!! */
912 return -ENOMEM;
913 }
914
915 new_dmi->next = bond->mc_list;
916 bond->mc_list = new_dmi;
917 new_dmi->dmi_addrlen = dmi->dmi_addrlen;
918 memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen);
919 new_dmi->dmi_users = dmi->dmi_users;
920 new_dmi->dmi_gusers = dmi->dmi_gusers;
921 }
922
923 return 0;
924}
925
926/*
927 * flush all members of flush->mc_list from device dev->mc_list
928 */
929static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev)
930{
454d7c9b 931 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 932 struct dev_mc_list *dmi;
933
934 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
935 dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
936 }
937
938 if (bond->params.mode == BOND_MODE_8023AD) {
939 /* del lacpdu mc addr from mc list */
940 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
941
942 dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
943 }
944}
945
946/*--------------------------- Active slave change ---------------------------*/
947
948/*
949 * Update the mc list and multicast-related flags for the new and
950 * old active slaves (if any) according to the multicast mode, and
951 * promiscuous flags unconditionally.
952 */
953static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active)
954{
955 struct dev_mc_list *dmi;
956
957 if (!USES_PRIMARY(bond->params.mode)) {
958 /* nothing to do - mc list is already up-to-date on
959 * all slaves
960 */
961 return;
962 }
963
964 if (old_active) {
965 if (bond->dev->flags & IFF_PROMISC) {
966 dev_set_promiscuity(old_active->dev, -1);
967 }
968
969 if (bond->dev->flags & IFF_ALLMULTI) {
970 dev_set_allmulti(old_active->dev, -1);
971 }
972
973 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
974 dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
975 }
976 }
977
978 if (new_active) {
7e1a1ac1 979 /* FIXME: Signal errors upstream. */
1da177e4
LT		 980 if (bond->dev->flags & IFF_PROMISC) {
981 dev_set_promiscuity(new_active->dev, 1);
982 }
983
984 if (bond->dev->flags & IFF_ALLMULTI) {
985 dev_set_allmulti(new_active->dev, 1);
986 }
987
988 for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) {
989 dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
990 }
a816c7c7 991 bond_resend_igmp_join_requests(bond);
1da177e4
LT		 992 }
993}
994
3915c1e8
JV		 995/*
996 * bond_do_fail_over_mac
997 *
998 * Perform special MAC address swapping for fail_over_mac settings
999 *
1000 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
1001 */
1002static void bond_do_fail_over_mac(struct bonding *bond,
1003 struct slave *new_active,
1004 struct slave *old_active)
1005{
1006 u8 tmp_mac[ETH_ALEN];
1007 struct sockaddr saddr;
1008 int rv;
1009
1010 switch (bond->params.fail_over_mac) {
1011 case BOND_FOM_ACTIVE:
1012 if (new_active)
1013 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1014 new_active->dev->addr_len);
1015 break;
1016 case BOND_FOM_FOLLOW:
1017 /*
1018 * if new_active && old_active, swap them
1019 * if just old_active, do nothing (going to no active slave)
1020 * if just new_active, set new_active to bond's MAC
1021 */
1022 if (!new_active)
1023 return;
1024
1025 write_unlock_bh(&bond->curr_slave_lock);
1026 read_unlock(&bond->lock);
1027
1028 if (old_active) {
1029 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1030 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1031 ETH_ALEN);
1032 saddr.sa_family = new_active->dev->type;
1033 } else {
1034 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1035 saddr.sa_family = bond->dev->type;
1036 }
1037
1038 rv = dev_set_mac_address(new_active->dev, &saddr);
1039 if (rv) {
1040 printk(KERN_ERR DRV_NAME
1041 ": %s: Error %d setting MAC of slave %s\n",
1042 bond->dev->name, -rv, new_active->dev->name);
1043 goto out;
1044 }
1045
1046 if (!old_active)
1047 goto out;
1048
1049 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1050 saddr.sa_family = old_active->dev->type;
1051
1052 rv = dev_set_mac_address(old_active->dev, &saddr);
1053 if (rv)
1054 printk(KERN_ERR DRV_NAME
1055 ": %s: Error %d setting MAC of slave %s\n",
1056 bond->dev->name, -rv, new_active->dev->name);
1057out:
1058 read_lock(&bond->lock);
1059 write_lock_bh(&bond->curr_slave_lock);
1060 break;
1061 default:
1062 printk(KERN_ERR DRV_NAME
1063 ": %s: bond_do_fail_over_mac impossible: bad policy %d\n",
1064 bond->dev->name, bond->params.fail_over_mac);
1065 break;
1066 }
1067
1068}
1069
1070
1da177e4
LT		 1071/**
1072 * find_best_interface - select the best available slave to be the active one
1073 * @bond: our bonding struct
1074 *
1075 * Warning: Caller must hold curr_slave_lock for writing.
1076 */
1077static struct slave *bond_find_best_slave(struct bonding *bond)
1078{
1079 struct slave *new_active, *old_active;
1080 struct slave *bestslave = NULL;
1081 int mintime = bond->params.updelay;
1082 int i;
1083
1084 new_active = old_active = bond->curr_active_slave;
1085
1086 if (!new_active) { /* there were no active slaves left */
1087 if (bond->slave_cnt > 0) { /* found one slave */
1088 new_active = bond->first_slave;
1089 } else {
1090 return NULL; /* still no slave, return NULL */
1091 }
1092 }
1093
1094 /* first try the primary link; if arping, a link must tx/rx traffic
1095 * before it can be considered the curr_active_slave - also, we would skip
1096 * slaves between the curr_active_slave and primary_slave that may be up
1097 * and able to arp
1098 */
1099 if ((bond->primary_slave) &&
1100 (!bond->params.arp_interval) &&
1101 (IS_UP(bond->primary_slave->dev))) {
1102 new_active = bond->primary_slave;
1103 }
1104
1105 /* remember where to stop iterating over the slaves */
1106 old_active = new_active;
1107
1108 bond_for_each_slave_from(bond, new_active, i, old_active) {
1109 if (IS_UP(new_active->dev)) {
1110 if (new_active->link == BOND_LINK_UP) {
1111 return new_active;
1112 } else if (new_active->link == BOND_LINK_BACK) {
1113 /* link up, but waiting for stabilization */
1114 if (new_active->delay < mintime) {
1115 mintime = new_active->delay;
1116 bestslave = new_active;
1117 }
1118 }
1119 }
1120 }
1121
1122 return bestslave;
1123}
1124
1125/**
1126 * change_active_interface - change the active slave into the specified one
1127 * @bond: our bonding struct
1128 * @new: the new slave to make the active one
1129 *
1130 * Set the new slave to the bond's settings and unset them on the old
1131 * curr_active_slave.
1132 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1133 *
1134 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1135 * because it is apparently the best available slave we have, even though its
1136 * updelay hasn't timed out yet.
1137 *
3915c1e8
JV		 1138 * If new_active is not NULL, caller must hold bond->lock for read and
1139 * curr_slave_lock for write_bh.
1da177e4 1140 */
a77b5325 1141void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1142{
1143 struct slave *old_active = bond->curr_active_slave;
1144
1145 if (old_active == new_active) {
1146 return;
1147 }
1148
1149 if (new_active) {
b2220cad
JV		 1150 new_active->jiffies = jiffies;
1151
1da177e4
LT		 1152 if (new_active->link == BOND_LINK_BACK) {
1153 if (USES_PRIMARY(bond->params.mode)) {
1154 printk(KERN_INFO DRV_NAME
1155 ": %s: making interface %s the new "
1156 "active one %d ms earlier.\n",
1157 bond->dev->name, new_active->dev->name,
1158 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1159 }
1160
1161 new_active->delay = 0;
1162 new_active->link = BOND_LINK_UP;
1da177e4
LT		 1163
1164 if (bond->params.mode == BOND_MODE_8023AD) {
1165 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1166 }
1167
58402054 1168 if (bond_is_lb(bond))
1da177e4 1169 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
1da177e4
LT		 1170 } else {
1171 if (USES_PRIMARY(bond->params.mode)) {
1172 printk(KERN_INFO DRV_NAME
1173 ": %s: making interface %s the new "
1174 "active one.\n",
1175 bond->dev->name, new_active->dev->name);
1176 }
1177 }
1178 }
1179
1da177e4
LT		 1180 if (USES_PRIMARY(bond->params.mode)) {
1181 bond_mc_swap(bond, new_active, old_active);
1182 }
1183
58402054 1184 if (bond_is_lb(bond)) {
1da177e4 1185 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1186 if (old_active)
1187 bond_set_slave_inactive_flags(old_active);
1188 if (new_active)
1189 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1190 } else {
1191 bond->curr_active_slave = new_active;
1192 }
c3ade5ca
JV		 1193
1194 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
1195 if (old_active) {
1196 bond_set_slave_inactive_flags(old_active);
1197 }
1198
1199 if (new_active) {
1200 bond_set_slave_active_flags(new_active);
2ab82852 1201
709f8a45
OG		 1202 if (bond->params.fail_over_mac)
1203 bond_do_fail_over_mac(bond, new_active,
1204 old_active);
3915c1e8 1205
709f8a45 1206 bond->send_grat_arp = bond->params.num_grat_arp;
b59f9f74 1207 bond_send_gratuitous_arp(bond);
01f3109d 1208
305d552a
BH		 1209 bond->send_unsol_na = bond->params.num_unsol_na;
1210 bond_send_unsolicited_na(bond);
1211
01f3109d
OG		 1212 write_unlock_bh(&bond->curr_slave_lock);
1213 read_unlock(&bond->lock);
1214
1215 netdev_bonding_change(bond->dev);
1216
1217 read_lock(&bond->lock);
1218 write_lock_bh(&bond->curr_slave_lock);
7893b249 1219 }
c3ade5ca 1220 }
1da177e4
LT		 1221}
1222
1223/**
1224 * bond_select_active_slave - select a new active slave, if needed
1225 * @bond: our bonding struct
1226 *
1227 * This functions shoud be called when one of the following occurs:
1228 * - The old curr_active_slave has been released or lost its link.
1229 * - The primary_slave has got its link back.
1230 * - A slave has got its link back and there's no old curr_active_slave.
1231 *
3915c1e8 1232 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1da177e4 1233 */
a77b5325 1234void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1235{
1236 struct slave *best_slave;
ff59c456 1237 int rv;
1da177e4
LT		 1238
1239 best_slave = bond_find_best_slave(bond);
1240 if (best_slave != bond->curr_active_slave) {
1241 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1242 rv = bond_set_carrier(bond);
1243 if (!rv)
1244 return;
1245
1246 if (netif_carrier_ok(bond->dev)) {
1247 printk(KERN_INFO DRV_NAME
1248 ": %s: first active interface up!\n",
1249 bond->dev->name);
1250 } else {
1251 printk(KERN_INFO DRV_NAME ": %s: "
1252 "now running without any active interface !\n",
1253 bond->dev->name);
1254 }
1da177e4
LT		 1255 }
1256}
1257
1258/*--------------------------- slave list handling ---------------------------*/
1259
1260/*
1261 * This function attaches the slave to the end of list.
1262 *
1263 * bond->lock held for writing by caller.
1264 */
1265static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1266{
1267 if (bond->first_slave == NULL) { /* attaching the first slave */
1268 new_slave->next = new_slave;
1269 new_slave->prev = new_slave;
1270 bond->first_slave = new_slave;
1271 } else {
1272 new_slave->next = bond->first_slave;
1273 new_slave->prev = bond->first_slave->prev;
1274 new_slave->next->prev = new_slave;
1275 new_slave->prev->next = new_slave;
1276 }
1277
1278 bond->slave_cnt++;
1279}
1280
1281/*
1282 * This function detaches the slave from the list.
1283 * WARNING: no check is made to verify if the slave effectively
1284 * belongs to <bond>.
1285 * Nothing is freed on return, structures are just unchained.
1286 * If any slave pointer in bond was pointing to <slave>,
1287 * it should be changed by the calling function.
1288 *
1289 * bond->lock held for writing by caller.
1290 */
1291static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1292{
1293 if (slave->next) {
1294 slave->next->prev = slave->prev;
1295 }
1296
1297 if (slave->prev) {
1298 slave->prev->next = slave->next;
1299 }
1300
1301 if (bond->first_slave == slave) { /* slave is the first slave */
1302 if (bond->slave_cnt > 1) { /* there are more slave */
1303 bond->first_slave = slave->next;
1304 } else {
1305 bond->first_slave = NULL; /* slave was the last one */
1306 }
1307 }
1308
1309 slave->next = NULL;
1310 slave->prev = NULL;
1311 bond->slave_cnt--;
1312}
1313
1314/*---------------------------------- IOCTL ----------------------------------*/
1315
4ad072c9
AB		 1316static int bond_sethwaddr(struct net_device *bond_dev,
1317 struct net_device *slave_dev)
1da177e4 1318{
5a03cdb7
HE		 1319 pr_debug("bond_dev=%p\n", bond_dev);
1320 pr_debug("slave_dev=%p\n", slave_dev);
1321 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1da177e4
LT		 1322 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1323 return 0;
1324}
1325
7f353bf2
HX		 1326#define BOND_VLAN_FEATURES \
1327 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1328 NETIF_F_HW_VLAN_FILTER)
8531c5ff
AK		 1329
1330/*
8e3babcd 1331 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX		 1332 * feature bits are managed elsewhere, so preserve those feature bits
1333 * on the master device.
8531c5ff
AK		 1334 */
1335static int bond_compute_features(struct bonding *bond)
1336{
8531c5ff
AK		 1337 struct slave *slave;
1338 struct net_device *bond_dev = bond->dev;
7f353bf2 1339 unsigned long features = bond_dev->features;
3158bf7d
MS		 1340 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1341 bond_dev->hard_header_len);
8e3babcd 1342 int i;
8531c5ff 1343
7f353bf2 1344 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
b63365a2
HX		 1345 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1346
1347 if (!bond->first_slave)
1348 goto done;
1349
1350 features &= ~NETIF_F_ONE_FOR_ALL;
7f353bf2 1351
54ef3137 1352 bond_for_each_slave(bond, slave, i) {
b63365a2
HX		 1353 features = netdev_increment_features(features,
1354 slave->dev->features,
1355 NETIF_F_ONE_FOR_ALL);
54ef3137
JV		 1356 if (slave->dev->hard_header_len > max_hard_header_len)
1357 max_hard_header_len = slave->dev->hard_header_len;
1358 }
8531c5ff 1359
b63365a2 1360done:
7f353bf2 1361 features |= (bond_dev->features & BOND_VLAN_FEATURES);
b63365a2 1362 bond_dev->features = netdev_fix_features(features, NULL);
54ef3137 1363 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1364
1365 return 0;
1366}
1367
872254dd
MS		 1368static void bond_setup_by_slave(struct net_device *bond_dev,
1369 struct net_device *slave_dev)
1370{
454d7c9b 1371 struct bonding *bond = netdev_priv(bond_dev);
d90a162a 1372
00829823 1373 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1374
1375 bond_dev->type = slave_dev->type;
1376 bond_dev->hard_header_len = slave_dev->hard_header_len;
1377 bond_dev->addr_len = slave_dev->addr_len;
1378
1379 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1380 slave_dev->addr_len);
d90a162a 1381 bond->setup_by_slave = 1;
872254dd
MS		 1382}
1383
1da177e4 1384/* enslave device <slave> to bond device <master> */
a77b5325 1385int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1386{
454d7c9b 1387 struct bonding *bond = netdev_priv(bond_dev);
eb7cc59a 1388 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 1389 struct slave *new_slave = NULL;
1390 struct dev_mc_list *dmi;
1391 struct sockaddr addr;
1392 int link_reporting;
1393 int old_features = bond_dev->features;
1394 int res = 0;
1395
552709d5 1396 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
eb7cc59a 1397 slave_ops->ndo_do_ioctl == NULL) {
1da177e4 1398 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1399 ": %s: Warning: no link monitoring support for %s\n",
1400 bond_dev->name, slave_dev->name);
1da177e4
LT		 1401 }
1402
1403 /* bond must be initialized by bond_open() before enslaving */
1404 if (!(bond_dev->flags & IFF_UP)) {
6b1bf096
MS		 1405 printk(KERN_WARNING DRV_NAME
1406 " %s: master_dev is not up in bond_enslave\n",
1407 bond_dev->name);
1da177e4
LT		 1408 }
1409
1410 /* already enslaved */
1411 if (slave_dev->flags & IFF_SLAVE) {
5a03cdb7 1412 pr_debug("Error, Device was already enslaved\n");
1da177e4
LT		 1413 return -EBUSY;
1414 }
1415
1416 /* vlan challenged mutual exclusion */
1417 /* no need to lock since we're protected by rtnl_lock */
1418 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 1419 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1da177e4
LT		 1420 if (!list_empty(&bond->vlan_list)) {
1421 printk(KERN_ERR DRV_NAME
4e0952c7 1422 ": %s: Error: cannot enslave VLAN "
1da177e4 1423 "challenged slave %s on VLAN enabled "
4e0952c7 1424 "bond %s\n", bond_dev->name, slave_dev->name,
1da177e4
LT		 1425 bond_dev->name);
1426 return -EPERM;
1427 } else {
1428 printk(KERN_WARNING DRV_NAME
4e0952c7 1429 ": %s: Warning: enslaved VLAN challenged "
1da177e4
LT		 1430 "slave %s. Adding VLANs will be blocked as "
1431 "long as %s is part of bond %s\n",
4e0952c7 1432 bond_dev->name, slave_dev->name, slave_dev->name,
1da177e4
LT		 1433 bond_dev->name);
1434 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1435 }
1436 } else {
5a03cdb7 1437 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1da177e4
LT		 1438 if (bond->slave_cnt == 0) {
1439 /* First slave, and it is not VLAN challenged,
1440 * so remove the block of adding VLANs over the bond.
1441 */
1442 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1443 }
1444 }
1445
217df670
JV		 1446 /*
1447 * Old ifenslave binaries are no longer supported. These can
1448 * be identified with moderate accurary by the state of the slave:
1449 * the current ifenslave will set the interface down prior to
1450 * enslaving it; the old ifenslave will not.
1451 */
1452 if ((slave_dev->flags & IFF_UP)) {
1453 printk(KERN_ERR DRV_NAME ": %s is up. "
1454 "This may be due to an out of date ifenslave.\n",
1455 slave_dev->name);
1456 res = -EPERM;
1457 goto err_undo_flags;
1458 }
1da177e4 1459
872254dd
MS		 1460 /* set bonding device ether type by slave - bonding netdevices are
1461 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1462 * there is a need to override some of the type dependent attribs/funcs.
1463 *
1464 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1465 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1466 */
1467 if (bond->slave_cnt == 0) {
1468 if (slave_dev->type != ARPHRD_ETHER)
1469 bond_setup_by_slave(bond_dev, slave_dev);
1470 } else if (bond_dev->type != slave_dev->type) {
1471 printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different "
1472 "from other slaves (%d), can not enslave it.\n",
1473 slave_dev->name,
1474 slave_dev->type, bond_dev->type);
1475 res = -EINVAL;
1476 goto err_undo_flags;
1477 }
1478
eb7cc59a 1479 if (slave_ops->ndo_set_mac_address == NULL) {
2ab82852
MS		 1480 if (bond->slave_cnt == 0) {
1481 printk(KERN_WARNING DRV_NAME
dd957c57
JV		 1482 ": %s: Warning: The first slave device "
1483 "specified does not support setting the MAC "
3915c1e8 1484 "address. Setting fail_over_mac to active.",
dd957c57 1485 bond_dev->name);
3915c1e8
JV		 1486 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1487 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852 1488 printk(KERN_ERR DRV_NAME
dd957c57
JV		 1489 ": %s: Error: The slave device specified "
1490 "does not support setting the MAC address, "
3915c1e8 1491 "but fail_over_mac is not set to active.\n"
2ab82852
MS		 1492 , bond_dev->name);
1493 res = -EOPNOTSUPP;
1494 goto err_undo_flags;
1495 }
1da177e4
LT		 1496 }
1497
243cb4e5 1498 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1499 if (!new_slave) {
1500 res = -ENOMEM;
1501 goto err_undo_flags;
1502 }
1503
1da177e4
LT		 1504 /* save slave's original flags before calling
1505 * netdev_set_master and dev_open
1506 */
1507 new_slave->original_flags = slave_dev->flags;
1508
217df670
JV		 1509 /*
1510 * Save slave's original ("permanent") mac address for modes
1511 * that need it, and for restoring it upon release, and then
1512 * set it to the master's address
1513 */
1514 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1515
dd957c57 1516 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1517 /*
1518 * Set slave to master's mac address. The application already
1519 * set the master's mac address to that of the first slave
1520 */
1521 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1522 addr.sa_family = slave_dev->type;
1523 res = dev_set_mac_address(slave_dev, &addr);
1524 if (res) {
5a03cdb7 1525 pr_debug("Error %d calling set_mac_address\n", res);
2ab82852
MS		 1526 goto err_free;
1527 }
217df670 1528 }
1da177e4 1529
c2edacf8
JV		 1530 res = netdev_set_master(slave_dev, bond_dev);
1531 if (res) {
5a03cdb7 1532 pr_debug("Error %d calling netdev_set_master\n", res);
569f0c4d 1533 goto err_restore_mac;
c2edacf8 1534 }
217df670
JV		 1535 /* open the slave since the application closed it */
1536 res = dev_open(slave_dev);
1537 if (res) {
5a03cdb7 1538 pr_debug("Openning slave %s failed\n", slave_dev->name);
569f0c4d 1539 goto err_unset_master;
1da177e4
LT		 1540 }
1541
1da177e4 1542 new_slave->dev = slave_dev;
0b680e75 1543 slave_dev->priv_flags |= IFF_BONDING;
1da177e4 1544
58402054 1545 if (bond_is_lb(bond)) {
1da177e4
LT		 1546 /* bond_alb_init_slave() must be called before all other stages since
1547 * it might fail and we do not want to have to undo everything
1548 */
1549 res = bond_alb_init_slave(bond, new_slave);
1550 if (res) {
569f0c4d 1551 goto err_close;
1da177e4
LT		 1552 }
1553 }
1554
1555 /* If the mode USES_PRIMARY, then the new slave gets the
1556 * master's promisc (and mc) settings only if it becomes the
1557 * curr_active_slave, and that is taken care of later when calling
1558 * bond_change_active()
1559 */
1560 if (!USES_PRIMARY(bond->params.mode)) {
1561 /* set promiscuity level to new slave */
1562 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC		 1563 res = dev_set_promiscuity(slave_dev, 1);
1564 if (res)
1565 goto err_close;
1da177e4
LT		 1566 }
1567
1568 /* set allmulti level to new slave */
1569 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC		 1570 res = dev_set_allmulti(slave_dev, 1);
1571 if (res)
1572 goto err_close;
1da177e4
LT		 1573 }
1574
b9e40857 1575 netif_addr_lock_bh(bond_dev);
1da177e4
LT		 1576 /* upload master's mc_list to new slave */
1577 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
1578 dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0);
1579 }
b9e40857 1580 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1581 }
1582
1583 if (bond->params.mode == BOND_MODE_8023AD) {
1584 /* add lacpdu mc addr to mc list */
1585 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1586
1587 dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0);
1588 }
1589
1590 bond_add_vlans_on_slave(bond, slave_dev);
1591
1592 write_lock_bh(&bond->lock);
1593
1594 bond_attach_slave(bond, new_slave);
1595
1596 new_slave->delay = 0;
1597 new_slave->link_failure_count = 0;
1598
8531c5ff
AK		 1599 bond_compute_features(bond);
1600
3915c1e8
JV		 1601 write_unlock_bh(&bond->lock);
1602
1603 read_lock(&bond->lock);
1604
f5b2b966
JV		 1605 new_slave->last_arp_rx = jiffies;
1606
1da177e4
LT		 1607 if (bond->params.miimon && !bond->params.use_carrier) {
1608 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1609
1610 if ((link_reporting == -1) && !bond->params.arp_interval) {
1611 /*
1612 * miimon is set but a bonded network driver
1613 * does not support ETHTOOL/MII and
1614 * arp_interval is not set. Note: if
1615 * use_carrier is enabled, we will never go
1616 * here (because netif_carrier is always
1617 * supported); thus, we don't need to change
1618 * the messages for netif_carrier.
1619 */
1620 printk(KERN_WARNING DRV_NAME
4e0952c7 1621 ": %s: Warning: MII and ETHTOOL support not "
1da177e4
LT		 1622 "available for interface %s, and "
1623 "arp_interval/arp_ip_target module parameters "
1624 "not specified, thus bonding will not detect "
1625 "link failures! see bonding.txt for details.\n",
4e0952c7 1626 bond_dev->name, slave_dev->name);
1da177e4
LT		 1627 } else if (link_reporting == -1) {
1628 /* unable get link status using mii/ethtool */
1629 printk(KERN_WARNING DRV_NAME
4e0952c7 1630 ": %s: Warning: can't get link status from "
1da177e4
LT		 1631 "interface %s; the network driver associated "
1632 "with this interface does not support MII or "
1633 "ETHTOOL link status reporting, thus miimon "
1634 "has no effect on this interface.\n",
4e0952c7 1635 bond_dev->name, slave_dev->name);
1da177e4
LT		 1636 }
1637 }
1638
1639 /* check for initial state */
1640 if (!bond->params.miimon ||
1641 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1642 if (bond->params.updelay) {
5a03cdb7 1643 pr_debug("Initial state of slave_dev is "
1da177e4
LT		 1644 "BOND_LINK_BACK\n");
1645 new_slave->link = BOND_LINK_BACK;
1646 new_slave->delay = bond->params.updelay;
1647 } else {
5a03cdb7 1648 pr_debug("Initial state of slave_dev is "
1da177e4
LT		 1649 "BOND_LINK_UP\n");
1650 new_slave->link = BOND_LINK_UP;
1651 }
1652 new_slave->jiffies = jiffies;
1653 } else {
5a03cdb7 1654 pr_debug("Initial state of slave_dev is "
1da177e4
LT		 1655 "BOND_LINK_DOWN\n");
1656 new_slave->link = BOND_LINK_DOWN;
1657 }
1658
1659 if (bond_update_speed_duplex(new_slave) &&
1660 (new_slave->link != BOND_LINK_DOWN)) {
1661 printk(KERN_WARNING DRV_NAME
4e0952c7 1662 ": %s: Warning: failed to get speed and duplex from %s, "
1da177e4 1663 "assumed to be 100Mb/sec and Full.\n",
4e0952c7 1664 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1665
1666 if (bond->params.mode == BOND_MODE_8023AD) {
4e0952c7
MW		 1667 printk(KERN_WARNING DRV_NAME
1668 ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL "
1da177e4 1669 "support in base driver for proper aggregator "
4e0952c7 1670 "selection.\n", bond_dev->name);
1da177e4
LT		 1671 }
1672 }
1673
1674 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1675 /* if there is a primary slave, remember it */
1676 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1677 bond->primary_slave = new_slave;
1678 }
1679 }
1680
3915c1e8
JV		 1681 write_lock_bh(&bond->curr_slave_lock);
1682
1da177e4
LT		 1683 switch (bond->params.mode) {
1684 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1685 bond_set_slave_inactive_flags(new_slave);
1686 bond_select_active_slave(bond);
1da177e4
LT		 1687 break;
1688 case BOND_MODE_8023AD:
1689 /* in 802.3ad mode, the internal mechanism
1690 * will activate the slaves in the selected
1691 * aggregator
1692 */
1693 bond_set_slave_inactive_flags(new_slave);
1694 /* if this is the first slave */
1695 if (bond->slave_cnt == 1) {
1696 SLAVE_AD_INFO(new_slave).id = 1;
1697 /* Initialize AD with the number of times that the AD timer is called in 1 second
1698 * can be called only after the mac address of the bond is set
1699 */
1700 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1701 bond->params.lacp_fast);
1702 } else {
1703 SLAVE_AD_INFO(new_slave).id =
1704 SLAVE_AD_INFO(new_slave->prev).id + 1;
1705 }
1706
1707 bond_3ad_bind_slave(new_slave);
1708 break;
1709 case BOND_MODE_TLB:
1710 case BOND_MODE_ALB:
1711 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1712 bond_set_slave_inactive_flags(new_slave);
1da177e4
LT		 1713 break;
1714 default:
5a03cdb7 1715 pr_debug("This slave is always active in trunk mode\n");
1da177e4
LT		 1716
1717 /* always active in trunk mode */
1718 new_slave->state = BOND_STATE_ACTIVE;
1719
1720 /* In trunking mode there is little meaning to curr_active_slave
1721 * anyway (it holds no special properties of the bond device),
1722 * so we can change it without calling change_active_interface()
1723 */
1724 if (!bond->curr_active_slave) {
1725 bond->curr_active_slave = new_slave;
1726 }
1727 break;
1728 } /* switch(bond_mode) */
1729
3915c1e8
JV		 1730 write_unlock_bh(&bond->curr_slave_lock);
1731
ff59c456
JV		 1732 bond_set_carrier(bond);
1733
3915c1e8 1734 read_unlock(&bond->lock);
1da177e4 1735
b76cdba9
MW		 1736 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1737 if (res)
569f0c4d 1738 goto err_close;
b76cdba9 1739
1da177e4
LT		 1740 printk(KERN_INFO DRV_NAME
1741 ": %s: enslaving %s as a%s interface with a%s link.\n",
1742 bond_dev->name, slave_dev->name,
1743 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1744 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1745
1746 /* enslave is successful */
1747 return 0;
1748
1749/* Undo stages on error */
1da177e4
LT		 1750err_close:
1751 dev_close(slave_dev);
1752
569f0c4d
JV		 1753err_unset_master:
1754 netdev_set_master(slave_dev, NULL);
1755
1da177e4 1756err_restore_mac:
dd957c57 1757 if (!bond->params.fail_over_mac) {
3915c1e8
JV		 1758 /* XXX TODO - fom follow mode needs to change master's
1759 * MAC if this slave's MAC is in use by the bond, or at
1760 * least print a warning.
1761 */
2ab82852
MS		 1762 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1763 addr.sa_family = slave_dev->type;
1764 dev_set_mac_address(slave_dev, &addr);
1765 }
1da177e4
LT		 1766
1767err_free:
1768 kfree(new_slave);
1769
1770err_undo_flags:
1771 bond_dev->features = old_features;
8531c5ff 1772
1da177e4
LT		 1773 return res;
1774}
1775
1776/*
1777 * Try to release the slave device <slave> from the bond device <master>
1778 * It is legal to access curr_active_slave without a lock because all the function
1779 * is write-locked.
1780 *
1781 * The rules for slave state should be:
1782 * for Active/Backup:
1783 * Active stays on all backups go down
1784 * for Bonded connections:
1785 * The first up interface should be left on and all others downed.
1786 */
a77b5325 1787int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1788{
454d7c9b 1789 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 1790 struct slave *slave, *oldcurrent;
1791 struct sockaddr addr;
1792 int mac_addr_differ;
1793
1794 /* slave is not a slave or master is not master of this slave */
1795 if (!(slave_dev->flags & IFF_SLAVE) ||
1796 (slave_dev->master != bond_dev)) {
1797 printk(KERN_ERR DRV_NAME
4e0952c7 1798 ": %s: Error: cannot release %s.\n",
1da177e4
LT		 1799 bond_dev->name, slave_dev->name);
1800 return -EINVAL;
1801 }
1802
1803 write_lock_bh(&bond->lock);
1804
1805 slave = bond_get_slave_by_dev(bond, slave_dev);
1806 if (!slave) {
1807 /* not a slave of this bond */
1808 printk(KERN_INFO DRV_NAME
1809 ": %s: %s not enslaved\n",
1810 bond_dev->name, slave_dev->name);
f5e2a7b2 1811 write_unlock_bh(&bond->lock);
1da177e4
LT		 1812 return -EINVAL;
1813 }
1814
3915c1e8
JV		 1815 if (!bond->params.fail_over_mac) {
1816 mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr,
1817 ETH_ALEN);
1818 if (!mac_addr_differ && (bond->slave_cnt > 1))
1819 printk(KERN_WARNING DRV_NAME
1820 ": %s: Warning: the permanent HWaddr of %s - "
e174961c 1821 "%pM - is still in use by %s. "
3915c1e8
JV		 1822 "Set the HWaddr of %s to a different address "
1823 "to avoid conflicts.\n",
1824 bond_dev->name, slave_dev->name,
e174961c 1825 slave->perm_hwaddr,
3915c1e8 1826 bond_dev->name, slave_dev->name);
1da177e4
LT		 1827 }
1828
1829 /* Inform AD package of unbinding of slave. */
1830 if (bond->params.mode == BOND_MODE_8023AD) {
1831 /* must be called before the slave is
1832 * detached from the list
1833 */
1834 bond_3ad_unbind_slave(slave);
1835 }
1836
1837 printk(KERN_INFO DRV_NAME
1838 ": %s: releasing %s interface %s\n",
1839 bond_dev->name,
1840 (slave->state == BOND_STATE_ACTIVE)
1841 ? "active" : "backup",
1842 slave_dev->name);
1843
1844 oldcurrent = bond->curr_active_slave;
1845
1846 bond->current_arp_slave = NULL;
1847
1848 /* release the slave from its bond */
1849 bond_detach_slave(bond, slave);
1850
8531c5ff
AK		 1851 bond_compute_features(bond);
1852
1da177e4
LT		 1853 if (bond->primary_slave == slave) {
1854 bond->primary_slave = NULL;
1855 }
1856
1857 if (oldcurrent == slave) {
1858 bond_change_active_slave(bond, NULL);
1859 }
1860
58402054 1861 if (bond_is_lb(bond)) {
1da177e4
LT		 1862 /* Must be called only after the slave has been
1863 * detached from the list and the curr_active_slave
1864 * has been cleared (if our_slave == old_current),
1865 * but before a new active slave is selected.
1866 */
2543331d 1867 write_unlock_bh(&bond->lock);
1da177e4 1868 bond_alb_deinit_slave(bond, slave);
2543331d 1869 write_lock_bh(&bond->lock);
1da177e4
LT		 1870 }
1871
059fe7a5
JV		 1872 if (oldcurrent == slave) {
1873 /*
1874 * Note that we hold RTNL over this sequence, so there
1875 * is no concern that another slave add/remove event
1876 * will interfere.
1877 */
1878 write_unlock_bh(&bond->lock);
1879 read_lock(&bond->lock);
1880 write_lock_bh(&bond->curr_slave_lock);
1881
1da177e4
LT		 1882 bond_select_active_slave(bond);
1883
059fe7a5
JV		 1884 write_unlock_bh(&bond->curr_slave_lock);
1885 read_unlock(&bond->lock);
1886 write_lock_bh(&bond->lock);
1887 }
1888
1da177e4 1889 if (bond->slave_cnt == 0) {
ff59c456
JV		 1890 bond_set_carrier(bond);
1891
1da177e4
LT		 1892 /* if the last slave was removed, zero the mac address
1893 * of the master so it will be set by the application
1894 * to the mac address of the first slave
1895 */
1896 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1897
1898 if (list_empty(&bond->vlan_list)) {
1899 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1900 } else {
1901 printk(KERN_WARNING DRV_NAME
4e0952c7 1902 ": %s: Warning: clearing HW address of %s while it "
1da177e4 1903 "still has VLANs.\n",
4e0952c7 1904 bond_dev->name, bond_dev->name);
1da177e4 1905 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 1906 ": %s: When re-adding slaves, make sure the bond's "
1907 "HW address matches its VLANs'.\n",
1908 bond_dev->name);
1da177e4
LT		 1909 }
1910 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1911 !bond_has_challenged_slaves(bond)) {
1912 printk(KERN_INFO DRV_NAME
4e0952c7 1913 ": %s: last VLAN challenged slave %s "
1da177e4 1914 "left bond %s. VLAN blocking is removed\n",
4e0952c7 1915 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1916 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1917 }
1918
1919 write_unlock_bh(&bond->lock);
1920
b76cdba9
MW		 1921 /* must do this from outside any spinlocks */
1922 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1923
1da177e4
LT		 1924 bond_del_vlans_from_slave(bond, slave_dev);
1925
1926 /* If the mode USES_PRIMARY, then we should only remove its
1927 * promisc and mc settings if it was the curr_active_slave, but that was
1928 * already taken care of above when we detached the slave
1929 */
1930 if (!USES_PRIMARY(bond->params.mode)) {
1931 /* unset promiscuity level from slave */
1932 if (bond_dev->flags & IFF_PROMISC) {
1933 dev_set_promiscuity(slave_dev, -1);
1934 }
1935
1936 /* unset allmulti level from slave */
1937 if (bond_dev->flags & IFF_ALLMULTI) {
1938 dev_set_allmulti(slave_dev, -1);
1939 }
1940
1941 /* flush master's mc_list from slave */
b9e40857 1942 netif_addr_lock_bh(bond_dev);
1da177e4 1943 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 1944 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1945 }
1946
1947 netdev_set_master(slave_dev, NULL);
1948
1949 /* close slave before restoring its mac address */
1950 dev_close(slave_dev);
1951
3915c1e8 1952 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852
MS		 1953 /* restore original ("permanent") mac address */
1954 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
1955 addr.sa_family = slave_dev->type;
1956 dev_set_mac_address(slave_dev, &addr);
1957 }
1da177e4 1958
8f903c70 1959 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 1960 IFF_SLAVE_INACTIVE | IFF_BONDING |
1961 IFF_SLAVE_NEEDARP);
1da177e4
LT		 1962
1963 kfree(slave);
1964
1965 return 0; /* deletion OK */
1966}
1967
d90a162a
MS		 1968/*
1969* Destroy a bonding device.
1970* Must be under rtnl_lock when this function is called.
1971*/
1972void bond_destroy(struct bonding *bond)
1973{
1974 bond_deinit(bond->dev);
1975 bond_destroy_sysfs_entry(bond);
8cbdeec6 1976 unregister_netdevice(bond->dev);
d90a162a
MS		 1977}
1978
a434e43f
JV		 1979static void bond_destructor(struct net_device *bond_dev)
1980{
244ef9b9 1981 struct bonding *bond = netdev_priv(bond_dev);
a434e43f
JV		 1982
1983 if (bond->wq)
1984 destroy_workqueue(bond->wq);
1985
1986 netif_addr_lock_bh(bond_dev);
1987 bond_mc_list_destroy(bond);
1988 netif_addr_unlock_bh(bond_dev);
1989
1990 free_netdev(bond_dev);
1991}
1992
d90a162a
MS		 1993/*
1994* First release a slave and than destroy the bond if no more slaves iare left.
1995* Must be under rtnl_lock when this function is called.
1996*/
1997int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev)
1998{
454d7c9b 1999 struct bonding *bond = netdev_priv(bond_dev);
d90a162a
MS		 2000 int ret;
2001
2002 ret = bond_release(bond_dev, slave_dev);
2003 if ((ret == 0) && (bond->slave_cnt == 0)) {
2004 printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n",
2005 bond_dev->name, bond_dev->name);
2006 bond_destroy(bond);
2007 }
2008 return ret;
2009}
2010
1da177e4
LT		 2011/*
2012 * This function releases all slaves.
2013 */
2014static int bond_release_all(struct net_device *bond_dev)
2015{
454d7c9b 2016 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2017 struct slave *slave;
2018 struct net_device *slave_dev;
2019 struct sockaddr addr;
2020
2021 write_lock_bh(&bond->lock);
2022
ff59c456
JV		 2023 netif_carrier_off(bond_dev);
2024
1da177e4
LT		 2025 if (bond->slave_cnt == 0) {
2026 goto out;
2027 }
2028
2029 bond->current_arp_slave = NULL;
2030 bond->primary_slave = NULL;
2031 bond_change_active_slave(bond, NULL);
2032
2033 while ((slave = bond->first_slave) != NULL) {
2034 /* Inform AD package of unbinding of slave
2035 * before slave is detached from the list.
2036 */
2037 if (bond->params.mode == BOND_MODE_8023AD) {
2038 bond_3ad_unbind_slave(slave);
2039 }
2040
2041 slave_dev = slave->dev;
2042 bond_detach_slave(bond, slave);
2043
2543331d
JV		 2044 /* now that the slave is detached, unlock and perform
2045 * all the undo steps that should not be called from
2046 * within a lock.
2047 */
2048 write_unlock_bh(&bond->lock);
2049
58402054 2050 if (bond_is_lb(bond)) {
1da177e4
LT		 2051 /* must be called only after the slave
2052 * has been detached from the list
2053 */
2054 bond_alb_deinit_slave(bond, slave);
2055 }
2056
8531c5ff
AK		 2057 bond_compute_features(bond);
2058
b76cdba9 2059 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 2060 bond_del_vlans_from_slave(bond, slave_dev);
2061
2062 /* If the mode USES_PRIMARY, then we should only remove its
2063 * promisc and mc settings if it was the curr_active_slave, but that was
2064 * already taken care of above when we detached the slave
2065 */
2066 if (!USES_PRIMARY(bond->params.mode)) {
2067 /* unset promiscuity level from slave */
2068 if (bond_dev->flags & IFF_PROMISC) {
2069 dev_set_promiscuity(slave_dev, -1);
2070 }
2071
2072 /* unset allmulti level from slave */
2073 if (bond_dev->flags & IFF_ALLMULTI) {
2074 dev_set_allmulti(slave_dev, -1);
2075 }
2076
2077 /* flush master's mc_list from slave */
b9e40857 2078 netif_addr_lock_bh(bond_dev);
1da177e4 2079 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2080 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 2081 }
2082
2083 netdev_set_master(slave_dev, NULL);
2084
2085 /* close slave before restoring its mac address */
2086 dev_close(slave_dev);
2087
dd957c57 2088 if (!bond->params.fail_over_mac) {
2ab82852
MS		 2089 /* restore original ("permanent") mac address*/
2090 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2091 addr.sa_family = slave_dev->type;
2092 dev_set_mac_address(slave_dev, &addr);
2093 }
1da177e4 2094
8f903c70
JV		 2095 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2096 IFF_SLAVE_INACTIVE);
1da177e4
LT		 2097
2098 kfree(slave);
2099
2100 /* re-acquire the lock before getting the next slave */
2101 write_lock_bh(&bond->lock);
2102 }
2103
2104 /* zero the mac address of the master so it will be
2105 * set by the application to the mac address of the
2106 * first slave
2107 */
2108 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2109
2110 if (list_empty(&bond->vlan_list)) {
2111 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
2112 } else {
2113 printk(KERN_WARNING DRV_NAME
4e0952c7 2114 ": %s: Warning: clearing HW address of %s while it "
1da177e4 2115 "still has VLANs.\n",
4e0952c7 2116 bond_dev->name, bond_dev->name);
1da177e4 2117 printk(KERN_WARNING DRV_NAME
4e0952c7
MW		 2118 ": %s: When re-adding slaves, make sure the bond's "
2119 "HW address matches its VLANs'.\n",
2120 bond_dev->name);
1da177e4
LT		 2121 }
2122
2123 printk(KERN_INFO DRV_NAME
2124 ": %s: released all slaves\n",
2125 bond_dev->name);
2126
2127out:
2128 write_unlock_bh(&bond->lock);
2129
2130 return 0;
2131}
2132
2133/*
2134 * This function changes the active slave to slave <slave_dev>.
2135 * It returns -EINVAL in the following cases.
2136 * - <slave_dev> is not found in the list.
2137 * - There is not active slave now.
2138 * - <slave_dev> is already active.
2139 * - The link state of <slave_dev> is not BOND_LINK_UP.
2140 * - <slave_dev> is not running.
2141 * In these cases, this fuction does nothing.
2142 * In the other cases, currnt_slave pointer is changed and 0 is returned.
2143 */
2144static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2145{
454d7c9b 2146 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2147 struct slave *old_active = NULL;
2148 struct slave *new_active = NULL;
2149 int res = 0;
2150
2151 if (!USES_PRIMARY(bond->params.mode)) {
2152 return -EINVAL;
2153 }
2154
2155 /* Verify that master_dev is indeed the master of slave_dev */
2156 if (!(slave_dev->flags & IFF_SLAVE) ||
2157 (slave_dev->master != bond_dev)) {
2158 return -EINVAL;
2159 }
2160
059fe7a5 2161 read_lock(&bond->lock);
1da177e4 2162
059fe7a5 2163 read_lock(&bond->curr_slave_lock);
1da177e4 2164 old_active = bond->curr_active_slave;
059fe7a5
JV		 2165 read_unlock(&bond->curr_slave_lock);
2166
1da177e4
LT		 2167 new_active = bond_get_slave_by_dev(bond, slave_dev);
2168
2169 /*
2170 * Changing to the current active: do nothing; return success.
2171 */
2172 if (new_active && (new_active == old_active)) {
059fe7a5 2173 read_unlock(&bond->lock);
1da177e4
LT		 2174 return 0;
2175 }
2176
2177 if ((new_active) &&
2178 (old_active) &&
2179 (new_active->link == BOND_LINK_UP) &&
2180 IS_UP(new_active->dev)) {
059fe7a5 2181 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2182 bond_change_active_slave(bond, new_active);
059fe7a5 2183 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2184 } else {
2185 res = -EINVAL;
2186 }
2187
059fe7a5 2188 read_unlock(&bond->lock);
1da177e4
LT		 2189
2190 return res;
2191}
2192
1da177e4
LT		 2193static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2194{
454d7c9b 2195 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2196
2197 info->bond_mode = bond->params.mode;
2198 info->miimon = bond->params.miimon;
2199
6603a6f2 2200 read_lock(&bond->lock);
1da177e4 2201 info->num_slaves = bond->slave_cnt;
6603a6f2 2202 read_unlock(&bond->lock);
1da177e4
LT		 2203
2204 return 0;
2205}
2206
2207static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2208{
454d7c9b 2209 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2210 struct slave *slave;
2211 int i, found = 0;
2212
2213 if (info->slave_id < 0) {
2214 return -ENODEV;
2215 }
2216
6603a6f2 2217 read_lock(&bond->lock);
1da177e4
LT		 2218
2219 bond_for_each_slave(bond, slave, i) {
2220 if (i == (int)info->slave_id) {
2221 found = 1;
2222 break;
2223 }
2224 }
2225
6603a6f2 2226 read_unlock(&bond->lock);
1da177e4
LT		 2227
2228 if (found) {
2229 strcpy(info->slave_name, slave->dev->name);
2230 info->link = slave->link;
2231 info->state = slave->state;
2232 info->link_failure_count = slave->link_failure_count;
2233 } else {
2234 return -ENODEV;
2235 }
2236
2237 return 0;
2238}
2239
2240/*-------------------------------- Monitoring -------------------------------*/
2241
1da177e4 2242
f0c76d61
JV		 2243static int bond_miimon_inspect(struct bonding *bond)
2244{
2245 struct slave *slave;
2246 int i, link_state, commit = 0;
1da177e4
LT		 2247
2248 bond_for_each_slave(bond, slave, i) {
f0c76d61 2249 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2250
f0c76d61 2251 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT		 2252
2253 switch (slave->link) {
f0c76d61
JV		 2254 case BOND_LINK_UP:
2255 if (link_state)
2256 continue;
1da177e4 2257
f0c76d61
JV		 2258 slave->link = BOND_LINK_FAIL;
2259 slave->delay = bond->params.downdelay;
2260 if (slave->delay) {
2261 printk(KERN_INFO DRV_NAME
2262 ": %s: link status down for %s"
2263 "interface %s, disabling it in %d ms.\n",
2264 bond->dev->name,
2265 (bond->params.mode ==
2266 BOND_MODE_ACTIVEBACKUP) ?
2267 ((slave->state == BOND_STATE_ACTIVE) ?
2268 "active " : "backup ") : "",
2269 slave->dev->name,
2270 bond->params.downdelay * bond->params.miimon);
1da177e4 2271 }
f0c76d61
JV		 2272 /*FALLTHRU*/
2273 case BOND_LINK_FAIL:
2274 if (link_state) {
2275 /*
2276 * recovered before downdelay expired
2277 */
2278 slave->link = BOND_LINK_UP;
1da177e4
LT		 2279 slave->jiffies = jiffies;
2280 printk(KERN_INFO DRV_NAME
2281 ": %s: link status up again after %d "
2282 "ms for interface %s.\n",
1b76b316 2283 bond->dev->name,
f0c76d61
JV		 2284 (bond->params.downdelay - slave->delay) *
2285 bond->params.miimon,
2286 slave->dev->name);
2287 continue;
1da177e4 2288 }
f0c76d61
JV		 2289
2290 if (slave->delay <= 0) {
2291 slave->new_link = BOND_LINK_DOWN;
2292 commit++;
2293 continue;
1da177e4 2294 }
1da177e4 2295
f0c76d61
JV		 2296 slave->delay--;
2297 break;
2298
2299 case BOND_LINK_DOWN:
2300 if (!link_state)
2301 continue;
2302
2303 slave->link = BOND_LINK_BACK;
2304 slave->delay = bond->params.updelay;
2305
2306 if (slave->delay) {
2307 printk(KERN_INFO DRV_NAME
2308 ": %s: link status up for "
2309 "interface %s, enabling it in %d ms.\n",
2310 bond->dev->name, slave->dev->name,
2311 bond->params.updelay *
2312 bond->params.miimon);
2313 }
2314 /*FALLTHRU*/
2315 case BOND_LINK_BACK:
2316 if (!link_state) {
2317 slave->link = BOND_LINK_DOWN;
1da177e4
LT		 2318 printk(KERN_INFO DRV_NAME
2319 ": %s: link status down again after %d "
2320 "ms for interface %s.\n",
1b76b316 2321 bond->dev->name,
f0c76d61
JV		 2322 (bond->params.updelay - slave->delay) *
2323 bond->params.miimon,
2324 slave->dev->name);
2325
2326 continue;
2327 }
2328
2329 if (slave->delay <= 0) {
2330 slave->new_link = BOND_LINK_UP;
2331 commit++;
2332 continue;
1da177e4 2333 }
f0c76d61
JV		 2334
2335 slave->delay--;
1da177e4 2336 break;
f0c76d61
JV		 2337 }
2338 }
1da177e4 2339
f0c76d61
JV		 2340 return commit;
2341}
1da177e4 2342
f0c76d61
JV		 2343static void bond_miimon_commit(struct bonding *bond)
2344{
2345 struct slave *slave;
2346 int i;
2347
2348 bond_for_each_slave(bond, slave, i) {
2349 switch (slave->new_link) {
2350 case BOND_LINK_NOCHANGE:
2351 continue;
1da177e4 2352
f0c76d61
JV		 2353 case BOND_LINK_UP:
2354 slave->link = BOND_LINK_UP;
2355 slave->jiffies = jiffies;
2356
2357 if (bond->params.mode == BOND_MODE_8023AD) {
2358 /* prevent it from being the active one */
2359 slave->state = BOND_STATE_BACKUP;
2360 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2361 /* make it immediately active */
2362 slave->state = BOND_STATE_ACTIVE;
2363 } else if (slave != bond->primary_slave) {
2364 /* prevent it from being the active one */
2365 slave->state = BOND_STATE_BACKUP;
1da177e4 2366 }
1da177e4 2367
f0c76d61
JV		 2368 printk(KERN_INFO DRV_NAME
2369 ": %s: link status definitely "
2370 "up for interface %s.\n",
2371 bond->dev->name, slave->dev->name);
1da177e4 2372
f0c76d61
JV		 2373 /* notify ad that the link status has changed */
2374 if (bond->params.mode == BOND_MODE_8023AD)
2375 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2376
58402054 2377 if (bond_is_lb(bond))
f0c76d61
JV		 2378 bond_alb_handle_link_change(bond, slave,
2379 BOND_LINK_UP);
1da177e4 2380
f0c76d61
JV		 2381 if (!bond->curr_active_slave ||
2382 (slave == bond->primary_slave))
2383 goto do_failover;
1da177e4 2384
f0c76d61 2385 continue;
059fe7a5 2386
f0c76d61 2387 case BOND_LINK_DOWN:
fba4acda
JV		 2388 if (slave->link_failure_count < UINT_MAX)
2389 slave->link_failure_count++;
2390
f0c76d61 2391 slave->link = BOND_LINK_DOWN;
1da177e4 2392
f0c76d61
JV		 2393 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2394 bond->params.mode == BOND_MODE_8023AD)
2395 bond_set_slave_inactive_flags(slave);
2396
2397 printk(KERN_INFO DRV_NAME
2398 ": %s: link status definitely down for "
2399 "interface %s, disabling it\n",
2400 bond->dev->name, slave->dev->name);
2401
2402 if (bond->params.mode == BOND_MODE_8023AD)
2403 bond_3ad_handle_link_change(slave,
2404 BOND_LINK_DOWN);
2405
2406 if (bond->params.mode == BOND_MODE_TLB ||
2407 bond->params.mode == BOND_MODE_ALB)
2408 bond_alb_handle_link_change(bond, slave,
2409 BOND_LINK_DOWN);
2410
2411 if (slave == bond->curr_active_slave)
2412 goto do_failover;
2413
2414 continue;
2415
2416 default:
2417 printk(KERN_ERR DRV_NAME
2418 ": %s: invalid new link %d on slave %s\n",
2419 bond->dev->name, slave->new_link,
2420 slave->dev->name);
2421 slave->new_link = BOND_LINK_NOCHANGE;
2422
2423 continue;
2424 }
2425
2426do_failover:
2427 ASSERT_RTNL();
2428 write_lock_bh(&bond->curr_slave_lock);
2429 bond_select_active_slave(bond);
2430 write_unlock_bh(&bond->curr_slave_lock);
2431 }
2432
2433 bond_set_carrier(bond);
1da177e4
LT		 2434}
2435
0b0eef66
JV		 2436/*
2437 * bond_mii_monitor
2438 *
2439 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV		 2440 * inspection, then (if inspection indicates something needs to be done)
2441 * an acquisition of appropriate locks followed by a commit phase to
2442 * implement whatever link state changes are indicated.
0b0eef66
JV		 2443 */
2444void bond_mii_monitor(struct work_struct *work)
2445{
2446 struct bonding *bond = container_of(work, struct bonding,
2447 mii_work.work);
0b0eef66
JV		 2448
2449 read_lock(&bond->lock);
f0c76d61
JV		 2450 if (bond->kill_timers)
2451 goto out;
2452
2453 if (bond->slave_cnt == 0)
2454 goto re_arm;
b59f9f74
JV		 2455
2456 if (bond->send_grat_arp) {
2457 read_lock(&bond->curr_slave_lock);
2458 bond_send_gratuitous_arp(bond);
2459 read_unlock(&bond->curr_slave_lock);
2460 }
2461
305d552a
BH		 2462 if (bond->send_unsol_na) {
2463 read_lock(&bond->curr_slave_lock);
2464 bond_send_unsolicited_na(bond);
2465 read_unlock(&bond->curr_slave_lock);
2466 }
2467
f0c76d61 2468 if (bond_miimon_inspect(bond)) {
0b0eef66
JV		 2469 read_unlock(&bond->lock);
2470 rtnl_lock();
2471 read_lock(&bond->lock);
f0c76d61
JV		 2472
2473 bond_miimon_commit(bond);
2474
5655662d
JV		 2475 read_unlock(&bond->lock);
2476 rtnl_unlock(); /* might sleep, hold no other locks */
2477 read_lock(&bond->lock);
0b0eef66
JV		 2478 }
2479
f0c76d61
JV		 2480re_arm:
2481 if (bond->params.miimon)
2482 queue_delayed_work(bond->wq, &bond->mii_work,
2483 msecs_to_jiffies(bond->params.miimon));
2484out:
0b0eef66 2485 read_unlock(&bond->lock);
0b0eef66 2486}
c3ade5ca 2487
d3bb52b0 2488static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2489{
2490 struct in_device *idev;
2491 struct in_ifaddr *ifa;
a144ea4b 2492 __be32 addr = 0;
c3ade5ca
JV		 2493
2494 if (!dev)
2495 return 0;
2496
2497 rcu_read_lock();
e5ed6399 2498 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2499 if (!idev)
2500 goto out;
2501
2502 ifa = idev->ifa_list;
2503 if (!ifa)
2504 goto out;
2505
2506 addr = ifa->ifa_local;
2507out:
2508 rcu_read_unlock();
2509 return addr;
2510}
2511
d3bb52b0 2512static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2513{
0883beca 2514 struct vlan_entry *vlan;
f5b2b966
JV		 2515
2516 if (ip == bond->master_ip)
2517 return 1;
2518
0883beca 2519 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f5b2b966
JV		 2520 if (ip == vlan->vlan_ip)
2521 return 1;
2522 }
2523
2524 return 0;
2525}
2526
c3ade5ca
JV		 2527/*
2528 * We go to the (large) trouble of VLAN tagging ARP frames because
2529 * switches in VLAN mode (especially if ports are configured as
2530 * "native" to a VLAN) might not pass non-tagged frames.
2531 */
d3bb52b0 2532static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2533{
2534 struct sk_buff *skb;
2535
5a03cdb7 2536 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
c3ade5ca
JV		 2537 slave_dev->name, dest_ip, src_ip, vlan_id);
2538
2539 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2540 NULL, slave_dev->dev_addr, NULL);
2541
2542 if (!skb) {
2543 printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n");
2544 return;
2545 }
2546 if (vlan_id) {
2547 skb = vlan_put_tag(skb, vlan_id);
2548 if (!skb) {
2549 printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n");
2550 return;
2551 }
2552 }
2553 arp_xmit(skb);
2554}
2555
2556
1da177e4
LT		 2557static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2558{
c3ade5ca 2559 int i, vlan_id, rv;
d3bb52b0 2560 __be32 *targets = bond->params.arp_targets;
0883beca 2561 struct vlan_entry *vlan;
c3ade5ca
JV		 2562 struct net_device *vlan_dev;
2563 struct flowi fl;
2564 struct rtable *rt;
1da177e4 2565
6b780567
MW		 2566 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2567 if (!targets[i])
2568 continue;
5a03cdb7 2569 pr_debug("basa: target %x\n", targets[i]);
c3ade5ca 2570 if (list_empty(&bond->vlan_list)) {
5a03cdb7 2571 pr_debug("basa: empty vlan: arp_send\n");
c3ade5ca
JV		 2572 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2573 bond->master_ip, 0);
2574 continue;
2575 }
2576
2577 /*
2578 * If VLANs are configured, we do a route lookup to
2579 * determine which VLAN interface would be used, so we
2580 * can tag the ARP with the proper VLAN tag.
2581 */
2582 memset(&fl, 0, sizeof(fl));
2583 fl.fl4_dst = targets[i];
2584 fl.fl4_tos = RTO_ONLINK;
2585
f206351a 2586 rv = ip_route_output_key(&init_net, &rt, &fl);
c3ade5ca
JV		 2587 if (rv) {
2588 if (net_ratelimit()) {
2589 printk(KERN_WARNING DRV_NAME
63779436
HH		 2590 ": %s: no route to arp_ip_target %pI4\n",
2591 bond->dev->name, &fl.fl4_dst);
c3ade5ca
JV		 2592 }
2593 continue;
2594 }
2595
2596 /*
2597 * This target is not on a VLAN
2598 */
2599 if (rt->u.dst.dev == bond->dev) {
ed4b9f80 2600 ip_rt_put(rt);
5a03cdb7 2601 pr_debug("basa: rtdev == bond->dev: arp_send\n");
c3ade5ca
JV		 2602 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2603 bond->master_ip, 0);
2604 continue;
2605 }
2606
2607 vlan_id = 0;
0883beca 2608 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2609 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2610 if (vlan_dev == rt->u.dst.dev) {
2611 vlan_id = vlan->vlan_id;
5a03cdb7 2612 pr_debug("basa: vlan match on %s %d\n",
c3ade5ca
JV		 2613 vlan_dev->name, vlan_id);
2614 break;
2615 }
2616 }
2617
2618 if (vlan_id) {
ed4b9f80 2619 ip_rt_put(rt);
c3ade5ca
JV		 2620 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2621 vlan->vlan_ip, vlan_id);
2622 continue;
2623 }
2624
2625 if (net_ratelimit()) {
2626 printk(KERN_WARNING DRV_NAME
63779436
HH		 2627 ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2628 bond->dev->name, &fl.fl4_dst,
c3ade5ca
JV		 2629 rt->u.dst.dev ? rt->u.dst.dev->name : "NULL");
2630 }
ed4b9f80 2631 ip_rt_put(rt);
c3ade5ca
JV		 2632 }
2633}
2634
2635/*
2636 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2637 * for each VLAN above us.
b59f9f74
JV		 2638 *
2639 * Caller must hold curr_slave_lock for read or better
c3ade5ca
JV		 2640 */
2641static void bond_send_gratuitous_arp(struct bonding *bond)
2642{
2643 struct slave *slave = bond->curr_active_slave;
2644 struct vlan_entry *vlan;
2645 struct net_device *vlan_dev;
2646
5a03cdb7 2647 pr_debug("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name,
c3ade5ca 2648 slave ? slave->dev->name : "NULL");
b59f9f74
JV		 2649
2650 if (!slave || !bond->send_grat_arp ||
2651 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
c3ade5ca
JV		 2652 return;
2653
b59f9f74
JV		 2654 bond->send_grat_arp--;
2655
c3ade5ca
JV		 2656 if (bond->master_ip) {
2657 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2658 bond->master_ip, 0);
c3ade5ca
JV		 2659 }
2660
2661 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2662 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2663 if (vlan->vlan_ip) {
2664 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2665 vlan->vlan_ip, vlan->vlan_id);
2666 }
1da177e4
LT		 2667 }
2668}
2669
d3bb52b0 2670static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2671{
2672 int i;
d3bb52b0 2673 __be32 *targets = bond->params.arp_targets;
f5b2b966
JV		 2674
2675 targets = bond->params.arp_targets;
2676 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
5a03cdb7 2677 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
63779436 2678 &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip));
f5b2b966
JV		 2679 if (sip == targets[i]) {
2680 if (bond_has_this_ip(bond, tip))
2681 slave->last_arp_rx = jiffies;
2682 return;
2683 }
2684 }
2685}
2686
2687static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2688{
2689 struct arphdr *arp;
2690 struct slave *slave;
2691 struct bonding *bond;
2692 unsigned char *arp_ptr;
d3bb52b0 2693 __be32 sip, tip;
f5b2b966 2694
c346dca1 2695 if (dev_net(dev) != &init_net)
e730c155
EB		 2696 goto out;
2697
f5b2b966
JV		 2698 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2699 goto out;
2700
454d7c9b 2701 bond = netdev_priv(dev);
f5b2b966
JV		 2702 read_lock(&bond->lock);
2703
5a03cdb7 2704 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
f5b2b966
JV		 2705 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2706 orig_dev ? orig_dev->name : "NULL");
2707
2708 slave = bond_get_slave_by_dev(bond, orig_dev);
2709 if (!slave || !slave_do_arp_validate(bond, slave))
2710 goto out_unlock;
2711
988b7050 2712 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
f5b2b966
JV		 2713 goto out_unlock;
2714
d0a92be0 2715 arp = arp_hdr(skb);
f5b2b966
JV		 2716 if (arp->ar_hln != dev->addr_len ||
2717 skb->pkt_type == PACKET_OTHERHOST ||
2718 skb->pkt_type == PACKET_LOOPBACK ||
2719 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2720 arp->ar_pro != htons(ETH_P_IP) ||
2721 arp->ar_pln != 4)
2722 goto out_unlock;
2723
2724 arp_ptr = (unsigned char *)(arp + 1);
2725 arp_ptr += dev->addr_len;
2726 memcpy(&sip, arp_ptr, 4);
2727 arp_ptr += 4 + dev->addr_len;
2728 memcpy(&tip, arp_ptr, 4);
2729
5a03cdb7 2730 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
63779436
HH		 2731 bond->dev->name, slave->dev->name, slave->state,
2732 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2733 &sip, &tip);
f5b2b966
JV		 2734
2735 /*
2736 * Backup slaves won't see the ARP reply, but do come through
2737 * here for each ARP probe (so we swap the sip/tip to validate
2738 * the probe). In a "redundant switch, common router" type of
2739 * configuration, the ARP probe will (hopefully) travel from
2740 * the active, through one switch, the router, then the other
2741 * switch before reaching the backup.
2742 */
2743 if (slave->state == BOND_STATE_ACTIVE)
2744 bond_validate_arp(bond, slave, sip, tip);
2745 else
2746 bond_validate_arp(bond, slave, tip, sip);
2747
2748out_unlock:
2749 read_unlock(&bond->lock);
2750out:
2751 dev_kfree_skb(skb);
2752 return NET_RX_SUCCESS;
2753}
2754
1da177e4
LT		 2755/*
2756 * this function is called regularly to monitor each slave's link
2757 * ensuring that traffic is being sent and received when arp monitoring
2758 * is used in load-balancing mode. if the adapter has been dormant, then an
2759 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2760 * arp monitoring in active backup mode.
2761 */
1b76b316 2762void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2763{
1b76b316
JV		 2764 struct bonding *bond = container_of(work, struct bonding,
2765 arp_work.work);
1da177e4
LT		 2766 struct slave *slave, *oldcurrent;
2767 int do_failover = 0;
2768 int delta_in_ticks;
2769 int i;
2770
2771 read_lock(&bond->lock);
2772
5ce0da8f 2773 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4
LT		 2774
2775 if (bond->kill_timers) {
2776 goto out;
2777 }
2778
2779 if (bond->slave_cnt == 0) {
2780 goto re_arm;
2781 }
2782
2783 read_lock(&bond->curr_slave_lock);
2784 oldcurrent = bond->curr_active_slave;
2785 read_unlock(&bond->curr_slave_lock);
2786
2787 /* see if any of the previous devices are up now (i.e. they have
2788 * xmt and rcv traffic). the curr_active_slave does not come into
2789 * the picture unless it is null. also, slave->jiffies is not needed
2790 * here because we send an arp on each slave and give a slave as
2791 * long as it needs to get the tx/rx within the delta.
2792 * TODO: what about up/down delay in arp mode? it wasn't here before
2793 * so it can wait
2794 */
2795 bond_for_each_slave(bond, slave, i) {
2796 if (slave->link != BOND_LINK_UP) {
b63bb739
DS		 2797 if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) &&
2798 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2799
2800 slave->link = BOND_LINK_UP;
2801 slave->state = BOND_STATE_ACTIVE;
2802
2803 /* primary_slave has no meaning in round-robin
2804 * mode. the window of a slave being up and
2805 * curr_active_slave being null after enslaving
2806 * is closed.
2807 */
2808 if (!oldcurrent) {
2809 printk(KERN_INFO DRV_NAME
2810 ": %s: link status definitely "
2811 "up for interface %s, ",
1b76b316 2812 bond->dev->name,
1da177e4
LT		 2813 slave->dev->name);
2814 do_failover = 1;
2815 } else {
2816 printk(KERN_INFO DRV_NAME
2817 ": %s: interface %s is now up\n",
1b76b316 2818 bond->dev->name,
1da177e4
LT		 2819 slave->dev->name);
2820 }
2821 }
2822 } else {
2823 /* slave->link == BOND_LINK_UP */
2824
2825 /* not all switches will respond to an arp request
2826 * when the source ip is 0, so don't take the link down
2827 * if we don't know our ip yet
2828 */
b63bb739 2829 if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) ||
4b8a9239 2830 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
1da177e4
LT		 2831
2832 slave->link = BOND_LINK_DOWN;
2833 slave->state = BOND_STATE_BACKUP;
2834
2835 if (slave->link_failure_count < UINT_MAX) {
2836 slave->link_failure_count++;
2837 }
2838
2839 printk(KERN_INFO DRV_NAME
2840 ": %s: interface %s is now down.\n",
1b76b316 2841 bond->dev->name,
1da177e4
LT		 2842 slave->dev->name);
2843
2844 if (slave == oldcurrent) {
2845 do_failover = 1;
2846 }
2847 }
2848 }
2849
2850 /* note: if switch is in round-robin mode, all links
2851 * must tx arp to ensure all links rx an arp - otherwise
2852 * links may oscillate or not come up at all; if switch is
2853 * in something like xor mode, there is nothing we can
2854 * do - all replies will be rx'ed on same link causing slaves
2855 * to be unstable during low/no traffic periods
2856 */
2857 if (IS_UP(slave->dev)) {
2858 bond_arp_send_all(bond, slave);
2859 }
2860 }
2861
2862 if (do_failover) {
059fe7a5 2863 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2864
2865 bond_select_active_slave(bond);
2866
059fe7a5 2867 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2868 }
2869
2870re_arm:
1b76b316
JV		 2871 if (bond->params.arp_interval)
2872 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2873out:
2874 read_unlock(&bond->lock);
2875}
2876
2877/*
b2220cad
JV		 2878 * Called to inspect slaves for active-backup mode ARP monitor link state
2879 * changes. Sets new_link in slaves to specify what action should take
2880 * place for the slave. Returns 0 if no changes are found, >0 if changes
2881 * to link states must be committed.
2882 *
2883 * Called with bond->lock held for read.
1da177e4 2884 */
b2220cad 2885static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
1da177e4 2886{
1da177e4 2887 struct slave *slave;
b2220cad 2888 int i, commit = 0;
1da177e4 2889
b2220cad
JV		 2890 bond_for_each_slave(bond, slave, i) {
2891 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2892
b2220cad
JV		 2893 if (slave->link != BOND_LINK_UP) {
2894 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2895 delta_in_ticks)) {
2896 slave->new_link = BOND_LINK_UP;
2897 commit++;
2898 }
1da177e4 2899
b2220cad
JV		 2900 continue;
2901 }
1da177e4 2902
b2220cad
JV		 2903 /*
2904 * Give slaves 2*delta after being enslaved or made
2905 * active. This avoids bouncing, as the last receive
2906 * times need a full ARP monitor cycle to be updated.
2907 */
2908 if (!time_after_eq(jiffies, slave->jiffies +
2909 2 * delta_in_ticks))
2910 continue;
2911
2912 /*
2913 * Backup slave is down if:
2914 * - No current_arp_slave AND
2915 * - more than 3*delta since last receive AND
2916 * - the bond has an IP address
2917 *
2918 * Note: a non-null current_arp_slave indicates
2919 * the curr_active_slave went down and we are
2920 * searching for a new one; under this condition
2921 * we only take the curr_active_slave down - this
2922 * gives each slave a chance to tx/rx traffic
2923 * before being taken out
2924 */
2925 if (slave->state == BOND_STATE_BACKUP &&
2926 !bond->current_arp_slave &&
2927 time_after(jiffies, slave_last_rx(bond, slave) +
2928 3 * delta_in_ticks)) {
2929 slave->new_link = BOND_LINK_DOWN;
2930 commit++;
2931 }
2932
2933 /*
2934 * Active slave is down if:
2935 * - more than 2*delta since transmitting OR
2936 * - (more than 2*delta since receive AND
2937 * the bond has an IP address)
2938 */
2939 if ((slave->state == BOND_STATE_ACTIVE) &&
2940 (time_after_eq(jiffies, slave->dev->trans_start +
2941 2 * delta_in_ticks) ||
2942 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2943 + 2 * delta_in_ticks)))) {
2944 slave->new_link = BOND_LINK_DOWN;
2945 commit++;
2946 }
1da177e4
LT		 2947 }
2948
b2220cad
JV		 2949 read_lock(&bond->curr_slave_lock);
2950
2951 /*
2952 * Trigger a commit if the primary option setting has changed.
1da177e4 2953 */
b2220cad
JV		 2954 if (bond->primary_slave &&
2955 (bond->primary_slave != bond->curr_active_slave) &&
2956 (bond->primary_slave->link == BOND_LINK_UP))
2957 commit++;
1da177e4 2958
b2220cad 2959 read_unlock(&bond->curr_slave_lock);
1da177e4 2960
b2220cad
JV		 2961 return commit;
2962}
1da177e4 2963
b2220cad
JV		 2964/*
2965 * Called to commit link state changes noted by inspection step of
2966 * active-backup mode ARP monitor.
2967 *
2968 * Called with RTNL and bond->lock for read.
2969 */
2970static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2971{
2972 struct slave *slave;
2973 int i;
1da177e4 2974
b2220cad
JV		 2975 bond_for_each_slave(bond, slave, i) {
2976 switch (slave->new_link) {
2977 case BOND_LINK_NOCHANGE:
2978 continue;
ff59c456 2979
b2220cad
JV		 2980 case BOND_LINK_UP:
2981 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2982
b2220cad
JV		 2983 if (!bond->curr_active_slave &&
2984 time_before_eq(jiffies, slave->dev->trans_start +
2985 delta_in_ticks)) {
2986 slave->link = BOND_LINK_UP;
2987 bond_change_active_slave(bond, slave);
2988 bond->current_arp_slave = NULL;
2989
2990 printk(KERN_INFO DRV_NAME
2991 ": %s: %s is up and now the "
2992 "active interface\n",
2993 bond->dev->name, slave->dev->name);
2994
2995 } else if (bond->curr_active_slave != slave) {
2996 /* this slave has just come up but we
2997 * already have a current slave; this can
2998 * also happen if bond_enslave adds a new
2999 * slave that is up while we are searching
3000 * for a new slave
1da177e4 3001 */
b2220cad
JV		 3002 slave->link = BOND_LINK_UP;
3003 bond_set_slave_inactive_flags(slave);
3004 bond->current_arp_slave = NULL;
3005
3006 printk(KERN_INFO DRV_NAME
3007 ": %s: backup interface %s is now up\n",
3008 bond->dev->name, slave->dev->name);
3009 }
1da177e4 3010
b2220cad 3011 write_unlock_bh(&bond->curr_slave_lock);
1da177e4 3012
b2220cad 3013 break;
1da177e4 3014
b2220cad
JV		 3015 case BOND_LINK_DOWN:
3016 if (slave->link_failure_count < UINT_MAX)
3017 slave->link_failure_count++;
3018
3019 slave->link = BOND_LINK_DOWN;
3020
3021 if (slave == bond->curr_active_slave) {
3022 printk(KERN_INFO DRV_NAME
3023 ": %s: link status down for active "
3024 "interface %s, disabling it\n",
3025 bond->dev->name, slave->dev->name);
1da177e4
LT		 3026
3027 bond_set_slave_inactive_flags(slave);
3028
b2220cad
JV		 3029 write_lock_bh(&bond->curr_slave_lock);
3030
3031 bond_select_active_slave(bond);
3032 if (bond->curr_active_slave)
3033 bond->curr_active_slave->jiffies =
3034 jiffies;
3035
3036 write_unlock_bh(&bond->curr_slave_lock);
3037
3038 bond->current_arp_slave = NULL;
3039
3040 } else if (slave->state == BOND_STATE_BACKUP) {
1da177e4
LT		 3041 printk(KERN_INFO DRV_NAME
3042 ": %s: backup interface %s is now down\n",
b2220cad
JV		 3043 bond->dev->name, slave->dev->name);
3044
3045 bond_set_slave_inactive_flags(slave);
1da177e4 3046 }
b2220cad
JV		 3047 break;
3048
3049 default:
3050 printk(KERN_ERR DRV_NAME
3051 ": %s: impossible: new_link %d on slave %s\n",
3052 bond->dev->name, slave->new_link,
3053 slave->dev->name);
1da177e4
LT		 3054 }
3055 }
3056
b2220cad
JV		 3057 /*
3058 * No race with changes to primary via sysfs, as we hold rtnl.
3059 */
3060 if (bond->primary_slave &&
3061 (bond->primary_slave != bond->curr_active_slave) &&
3062 (bond->primary_slave->link == BOND_LINK_UP)) {
3063 write_lock_bh(&bond->curr_slave_lock);
3064 bond_change_active_slave(bond, bond->primary_slave);
3065 write_unlock_bh(&bond->curr_slave_lock);
3066 }
1da177e4 3067
b2220cad
JV		 3068 bond_set_carrier(bond);
3069}
1da177e4 3070
b2220cad
JV		 3071/*
3072 * Send ARP probes for active-backup mode ARP monitor.
3073 *
3074 * Called with bond->lock held for read.
3075 */
3076static void bond_ab_arp_probe(struct bonding *bond)
3077{
3078 struct slave *slave;
3079 int i;
1da177e4 3080
b2220cad 3081 read_lock(&bond->curr_slave_lock);
1da177e4 3082
b2220cad
JV		 3083 if (bond->current_arp_slave && bond->curr_active_slave)
3084 printk("PROBE: c_arp %s && cas %s BAD\n",
3085 bond->current_arp_slave->dev->name,
3086 bond->curr_active_slave->dev->name);
1da177e4 3087
b2220cad
JV		 3088 if (bond->curr_active_slave) {
3089 bond_arp_send_all(bond, bond->curr_active_slave);
3090 read_unlock(&bond->curr_slave_lock);
3091 return;
3092 }
1da177e4 3093
b2220cad 3094 read_unlock(&bond->curr_slave_lock);
059fe7a5 3095
b2220cad
JV		 3096 /* if we don't have a curr_active_slave, search for the next available
3097 * backup slave from the current_arp_slave and make it the candidate
3098 * for becoming the curr_active_slave
3099 */
1da177e4 3100
b2220cad
JV		 3101 if (!bond->current_arp_slave) {
3102 bond->current_arp_slave = bond->first_slave;
3103 if (!bond->current_arp_slave)
3104 return;
3105 }
1da177e4 3106
b2220cad 3107 bond_set_slave_inactive_flags(bond->current_arp_slave);
059fe7a5 3108
b2220cad
JV		 3109 /* search for next candidate */
3110 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3111 if (IS_UP(slave->dev)) {
3112 slave->link = BOND_LINK_BACK;
3113 bond_set_slave_active_flags(slave);
3114 bond_arp_send_all(bond, slave);
1da177e4 3115 slave->jiffies = jiffies;
b2220cad
JV		 3116 bond->current_arp_slave = slave;
3117 break;
1da177e4
LT		 3118 }
3119
b2220cad
JV		 3120 /* if the link state is up at this point, we
3121 * mark it down - this can happen if we have
3122 * simultaneous link failures and
3123 * reselect_active_interface doesn't make this
3124 * one the current slave so it is still marked
3125 * up when it is actually down
1da177e4 3126 */
b2220cad
JV		 3127 if (slave->link == BOND_LINK_UP) {
3128 slave->link = BOND_LINK_DOWN;
3129 if (slave->link_failure_count < UINT_MAX)
3130 slave->link_failure_count++;
1da177e4 3131
b2220cad
JV		 3132 bond_set_slave_inactive_flags(slave);
3133
3134 printk(KERN_INFO DRV_NAME
3135 ": %s: backup interface %s is now down.\n",
3136 bond->dev->name, slave->dev->name);
1da177e4 3137 }
b2220cad
JV		 3138 }
3139}
1da177e4 3140
b2220cad
JV		 3141void bond_activebackup_arp_mon(struct work_struct *work)
3142{
3143 struct bonding *bond = container_of(work, struct bonding,
3144 arp_work.work);
3145 int delta_in_ticks;
1da177e4 3146
b2220cad 3147 read_lock(&bond->lock);
1da177e4 3148
b2220cad
JV		 3149 if (bond->kill_timers)
3150 goto out;
1da177e4 3151
b2220cad 3152 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 3153
b2220cad
JV		 3154 if (bond->slave_cnt == 0)
3155 goto re_arm;
3156
b59f9f74
JV		 3157 if (bond->send_grat_arp) {
3158 read_lock(&bond->curr_slave_lock);
3159 bond_send_gratuitous_arp(bond);
3160 read_unlock(&bond->curr_slave_lock);
3161 }
3162
305d552a
BH		 3163 if (bond->send_unsol_na) {
3164 read_lock(&bond->curr_slave_lock);
3165 bond_send_unsolicited_na(bond);
3166 read_unlock(&bond->curr_slave_lock);
3167 }
3168
b2220cad
JV		 3169 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3170 read_unlock(&bond->lock);
3171 rtnl_lock();
3172 read_lock(&bond->lock);
3173
3174 bond_ab_arp_commit(bond, delta_in_ticks);
3175
3176 read_unlock(&bond->lock);
3177 rtnl_unlock();
3178 read_lock(&bond->lock);
1da177e4
LT		 3179 }
3180
b2220cad
JV		 3181 bond_ab_arp_probe(bond);
3182
1da177e4
LT		 3183re_arm:
3184 if (bond->params.arp_interval) {
1b76b316 3185 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3186 }
3187out:
3188 read_unlock(&bond->lock);
3189}
3190
3191/*------------------------------ proc/seq_file-------------------------------*/
3192
3193#ifdef CONFIG_PROC_FS
3194
1da177e4
LT		 3195static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
3196{
3197 struct bonding *bond = seq->private;
3198 loff_t off = 0;
3199 struct slave *slave;
3200 int i;
3201
3202 /* make sure the bond won't be taken away */
3203 read_lock(&dev_base_lock);
6603a6f2 3204 read_lock(&bond->lock);
1da177e4
LT		 3205
3206 if (*pos == 0) {
3207 return SEQ_START_TOKEN;
3208 }
3209
3210 bond_for_each_slave(bond, slave, i) {
3211 if (++off == *pos) {
3212 return slave;
3213 }
3214 }
3215
3216 return NULL;
3217}
3218
3219static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3220{
3221 struct bonding *bond = seq->private;
3222 struct slave *slave = v;
3223
3224 ++*pos;
3225 if (v == SEQ_START_TOKEN) {
3226 return bond->first_slave;
3227 }
3228
3229 slave = slave->next;
3230
3231 return (slave == bond->first_slave) ? NULL : slave;
3232}
3233
3234static void bond_info_seq_stop(struct seq_file *seq, void *v)
3235{
3236 struct bonding *bond = seq->private;
3237
6603a6f2 3238 read_unlock(&bond->lock);
1da177e4
LT		 3239 read_unlock(&dev_base_lock);
3240}
3241
3242static void bond_info_show_master(struct seq_file *seq)
3243{
3244 struct bonding *bond = seq->private;
3245 struct slave *curr;
4756b02f 3246 int i;
1da177e4
LT		 3247
3248 read_lock(&bond->curr_slave_lock);
3249 curr = bond->curr_active_slave;
3250 read_unlock(&bond->curr_slave_lock);
3251
dd957c57 3252 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3253 bond_mode_name(bond->params.mode));
3254
dd957c57
JV		 3255 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3256 bond->params.fail_over_mac)
3915c1e8
JV		 3257 seq_printf(seq, " (fail_over_mac %s)",
3258 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
dd957c57
JV		 3259
3260 seq_printf(seq, "\n");
3261
c61b75ad
MW		 3262 if (bond->params.mode == BOND_MODE_XOR ||
3263 bond->params.mode == BOND_MODE_8023AD) {
3264 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3265 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3266 bond->params.xmit_policy);
3267 }
3268
1da177e4
LT		 3269 if (USES_PRIMARY(bond->params.mode)) {
3270 seq_printf(seq, "Primary Slave: %s\n",
0f418b2a
MW		 3271 (bond->primary_slave) ?
3272 bond->primary_slave->dev->name : "None");
1da177e4
LT		 3273
3274 seq_printf(seq, "Currently Active Slave: %s\n",
3275 (curr) ? curr->dev->name : "None");
3276 }
3277
ff59c456
JV		 3278 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3279 "up" : "down");
1da177e4
LT		 3280 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3281 seq_printf(seq, "Up Delay (ms): %d\n",
3282 bond->params.updelay * bond->params.miimon);
3283 seq_printf(seq, "Down Delay (ms): %d\n",
3284 bond->params.downdelay * bond->params.miimon);
3285
4756b02f
MW		 3286
3287 /* ARP information */
3288 if(bond->params.arp_interval > 0) {
3289 int printed=0;
3290 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3291 bond->params.arp_interval);
3292
3293 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3294
3295 for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) {
3296 if (!bond->params.arp_targets[i])
3297 continue;
3298 if (printed)
3299 seq_printf(seq, ",");
8cf14e38 3300 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
4756b02f
MW		 3301 printed = 1;
3302 }
3303 seq_printf(seq, "\n");
3304 }
3305
1da177e4
LT		 3306 if (bond->params.mode == BOND_MODE_8023AD) {
3307 struct ad_info ad_info;
3308
3309 seq_puts(seq, "\n802.3ad info\n");
3310 seq_printf(seq, "LACP rate: %s\n",
3311 (bond->params.lacp_fast) ? "fast" : "slow");
fd989c83
JV		 3312 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3313 ad_select_tbl[bond->params.ad_select].modename);
1da177e4
LT		 3314
3315 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3316 seq_printf(seq, "bond %s has no active aggregator\n",
3317 bond->dev->name);
3318 } else {
3319 seq_printf(seq, "Active Aggregator Info:\n");
3320
3321 seq_printf(seq, "\tAggregator ID: %d\n",
3322 ad_info.aggregator_id);
3323 seq_printf(seq, "\tNumber of ports: %d\n",
3324 ad_info.ports);
3325 seq_printf(seq, "\tActor Key: %d\n",
3326 ad_info.actor_key);
3327 seq_printf(seq, "\tPartner Key: %d\n",
3328 ad_info.partner_key);
e174961c
JB		 3329 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3330 ad_info.partner_system);
1da177e4
LT		 3331 }
3332 }
3333}
3334
3335static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave)
3336{
3337 struct bonding *bond = seq->private;
3338
3339 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3340 seq_printf(seq, "MII Status: %s\n",
3341 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3342 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3343 slave->link_failure_count);
3344
e174961c 3345 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
1da177e4
LT		 3346
3347 if (bond->params.mode == BOND_MODE_8023AD) {
3348 const struct aggregator *agg
3349 = SLAVE_AD_INFO(slave).port.aggregator;
3350
3351 if (agg) {
3352 seq_printf(seq, "Aggregator ID: %d\n",
3353 agg->aggregator_identifier);
3354 } else {
3355 seq_puts(seq, "Aggregator ID: N/A\n");
3356 }
3357 }
3358}
3359
3360static int bond_info_seq_show(struct seq_file *seq, void *v)
3361{
3362 if (v == SEQ_START_TOKEN) {
3363 seq_printf(seq, "%s\n", version);
3364 bond_info_show_master(seq);
3365 } else {
3366 bond_info_show_slave(seq, v);
3367 }
3368
3369 return 0;
3370}
3371
3372static struct seq_operations bond_info_seq_ops = {
3373 .start = bond_info_seq_start,
3374 .next = bond_info_seq_next,
3375 .stop = bond_info_seq_stop,
3376 .show = bond_info_seq_show,
3377};
3378
3379static int bond_info_open(struct inode *inode, struct file *file)
3380{
3381 struct seq_file *seq;
3382 struct proc_dir_entry *proc;
3383 int res;
3384
3385 res = seq_open(file, &bond_info_seq_ops);
3386 if (!res) {
3387 /* recover the pointer buried in proc_dir_entry data */
3388 seq = file->private_data;
3389 proc = PDE(inode);
3390 seq->private = proc->data;
3391 }
3392
3393 return res;
3394}
3395
d54b1fdb 3396static const struct file_operations bond_info_fops = {
1da177e4
LT		 3397 .owner = THIS_MODULE,
3398 .open = bond_info_open,
3399 .read = seq_read,
3400 .llseek = seq_lseek,
3401 .release = seq_release,
3402};
3403
3404static int bond_create_proc_entry(struct bonding *bond)
3405{
3406 struct net_device *bond_dev = bond->dev;
3407
3408 if (bond_proc_dir) {
a95609cb
DL		 3409 bond->proc_entry = proc_create_data(bond_dev->name,
3410 S_IRUGO, bond_proc_dir,
3411 &bond_info_fops, bond);
1da177e4
LT		 3412 if (bond->proc_entry == NULL) {
3413 printk(KERN_WARNING DRV_NAME
3414 ": Warning: Cannot create /proc/net/%s/%s\n",
3415 DRV_NAME, bond_dev->name);
3416 } else {
1da177e4
LT		 3417 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
3418 }
3419 }
3420
3421 return 0;
3422}
3423
3424static void bond_remove_proc_entry(struct bonding *bond)
3425{
3426 if (bond_proc_dir && bond->proc_entry) {
3427 remove_proc_entry(bond->proc_file_name, bond_proc_dir);
3428 memset(bond->proc_file_name, 0, IFNAMSIZ);
3429 bond->proc_entry = NULL;
3430 }
3431}
3432
3433/* Create the bonding directory under /proc/net, if doesn't exist yet.
3434 * Caller must hold rtnl_lock.
3435 */
3436static void bond_create_proc_dir(void)
3437{
3438 int len = strlen(DRV_NAME);
3439
457c4cbc 3440 for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir;
1da177e4
LT		 3441 bond_proc_dir = bond_proc_dir->next) {
3442 if ((bond_proc_dir->namelen == len) &&
3443 !memcmp(bond_proc_dir->name, DRV_NAME, len)) {
3444 break;
3445 }
3446 }
3447
3448 if (!bond_proc_dir) {
457c4cbc 3449 bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3450 if (bond_proc_dir) {
3451 bond_proc_dir->owner = THIS_MODULE;
3452 } else {
3453 printk(KERN_WARNING DRV_NAME
3454 ": Warning: cannot create /proc/net/%s\n",
3455 DRV_NAME);
3456 }
3457 }
3458}
3459
3460/* Destroy the bonding directory under /proc/net, if empty.
3461 * Caller must hold rtnl_lock.
3462 */
3463static void bond_destroy_proc_dir(void)
3464{
3465 struct proc_dir_entry *de;
3466
3467 if (!bond_proc_dir) {
3468 return;
3469 }
3470
3471 /* verify that the /proc dir is empty */
3472 for (de = bond_proc_dir->subdir; de; de = de->next) {
3473 /* ignore . and .. */
3474 if (*(de->name) != '.') {
3475 break;
3476 }
3477 }
3478
3479 if (de) {
3480 if (bond_proc_dir->owner == THIS_MODULE) {
3481 bond_proc_dir->owner = NULL;
3482 }
3483 } else {
457c4cbc 3484 remove_proc_entry(DRV_NAME, init_net.proc_net);
1da177e4
LT		 3485 bond_proc_dir = NULL;
3486 }
3487}
3488#endif /* CONFIG_PROC_FS */
3489
3490/*-------------------------- netdev event handling --------------------------*/
3491
3492/*
3493 * Change device name
3494 */
3495static int bond_event_changename(struct bonding *bond)
3496{
3497#ifdef CONFIG_PROC_FS
3498 bond_remove_proc_entry(bond);
3499 bond_create_proc_entry(bond);
3500#endif
b76cdba9
MW		 3501 down_write(&(bonding_rwsem));
3502 bond_destroy_sysfs_entry(bond);
3503 bond_create_sysfs_entry(bond);
3504 up_write(&(bonding_rwsem));
1da177e4
LT		 3505 return NOTIFY_DONE;
3506}
3507
3508static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev)
3509{
454d7c9b 3510 struct bonding *event_bond = netdev_priv(bond_dev);
1da177e4
LT		 3511
3512 switch (event) {
3513 case NETDEV_CHANGENAME:
3514 return bond_event_changename(event_bond);
3515 case NETDEV_UNREGISTER:
3b96c858 3516 bond_release_all(event_bond->dev);
1da177e4
LT		 3517 break;
3518 default:
3519 break;
3520 }
3521
3522 return NOTIFY_DONE;
3523}
3524
3525static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev)
3526{
3527 struct net_device *bond_dev = slave_dev->master;
454d7c9b 3528 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3529
3530 switch (event) {
3531 case NETDEV_UNREGISTER:
3532 if (bond_dev) {
1284cd3a
JV		 3533 if (bond->setup_by_slave)
3534 bond_release_and_destroy(bond_dev, slave_dev);
3535 else
3536 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3537 }
3538 break;
3539 case NETDEV_CHANGE:
3540 /*
3541 * TODO: is this what we get if somebody
3542 * sets up a hierarchical bond, then rmmod's
3543 * one of the slave bonding devices?
3544 */
3545 break;
3546 case NETDEV_DOWN:
3547 /*
3548 * ... Or is it this?
3549 */
3550 break;
3551 case NETDEV_CHANGEMTU:
3552 /*
3553 * TODO: Should slaves be allowed to
3554 * independently alter their MTU? For
3555 * an active-backup bond, slaves need
3556 * not be the same type of device, so
3557 * MTUs may vary. For other modes,
3558 * slaves arguably should have the
3559 * same MTUs. To do this, we'd need to
3560 * take over the slave's change_mtu
3561 * function for the duration of their
3562 * servitude.
3563 */
3564 break;
3565 case NETDEV_CHANGENAME:
3566 /*
3567 * TODO: handle changing the primary's name
3568 */
3569 break;
8531c5ff
AK		 3570 case NETDEV_FEAT_CHANGE:
3571 bond_compute_features(bond);
3572 break;
1da177e4
LT		 3573 default:
3574 break;
3575 }
3576
3577 return NOTIFY_DONE;
3578}
3579
3580/*
3581 * bond_netdev_event: handle netdev notifier chain events.
3582 *
3583 * This function receives events for the netdev chain. The caller (an
e041c683 3584 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3585 * locks for us to safely manipulate the slave devices (RTNL lock,
3586 * dev_probe_lock).
3587 */
3588static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr)
3589{
3590 struct net_device *event_dev = (struct net_device *)ptr;
3591
c346dca1 3592 if (dev_net(event_dev) != &init_net)
e9dc8653
EB		 3593 return NOTIFY_DONE;
3594
5a03cdb7 3595 pr_debug("event_dev: %s, event: %lx\n",
1da177e4
LT		 3596 (event_dev ? event_dev->name : "None"),
3597 event);
3598
0b680e75
JV		 3599 if (!(event_dev->priv_flags & IFF_BONDING))
3600 return NOTIFY_DONE;
3601
1da177e4 3602 if (event_dev->flags & IFF_MASTER) {
5a03cdb7 3603 pr_debug("IFF_MASTER\n");
1da177e4
LT		 3604 return bond_master_netdev_event(event, event_dev);
3605 }
3606
3607 if (event_dev->flags & IFF_SLAVE) {
5a03cdb7 3608 pr_debug("IFF_SLAVE\n");
1da177e4
LT		 3609 return bond_slave_netdev_event(event, event_dev);
3610 }
3611
3612 return NOTIFY_DONE;
3613}
3614
c3ade5ca
JV		 3615/*
3616 * bond_inetaddr_event: handle inetaddr notifier chain events.
3617 *
3618 * We keep track of device IPs primarily to use as source addresses in
3619 * ARP monitor probes (rather than spewing out broadcasts all the time).
3620 *
3621 * We track one IP for the main device (if it has one), plus one per VLAN.
3622 */
3623static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3624{
3625 struct in_ifaddr *ifa = ptr;
3626 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
0883beca
PE		 3627 struct bonding *bond;
3628 struct vlan_entry *vlan;
c3ade5ca 3629
c346dca1 3630 if (dev_net(ifa->ifa_dev->dev) != &init_net)
6133fb1a
DL		 3631 return NOTIFY_DONE;
3632
0883beca 3633 list_for_each_entry(bond, &bond_dev_list, bond_list) {
c3ade5ca
JV		 3634 if (bond->dev == event_dev) {
3635 switch (event) {
3636 case NETDEV_UP:
3637 bond->master_ip = ifa->ifa_local;
3638 return NOTIFY_OK;
3639 case NETDEV_DOWN:
3640 bond->master_ip = bond_glean_dev_ip(bond->dev);
3641 return NOTIFY_OK;
3642 default:
3643 return NOTIFY_DONE;
3644 }
3645 }
3646
0883beca 3647 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 3648 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3649 if (vlan_dev == event_dev) {
3650 switch (event) {
3651 case NETDEV_UP:
3652 vlan->vlan_ip = ifa->ifa_local;
3653 return NOTIFY_OK;
3654 case NETDEV_DOWN:
3655 vlan->vlan_ip =
3656 bond_glean_dev_ip(vlan_dev);
3657 return NOTIFY_OK;
3658 default:
3659 return NOTIFY_DONE;
3660 }
3661 }
3662 }
3663 }
3664 return NOTIFY_DONE;
3665}
3666
1da177e4
LT		 3667static struct notifier_block bond_netdev_notifier = {
3668 .notifier_call = bond_netdev_event,
3669};
3670
c3ade5ca
JV		 3671static struct notifier_block bond_inetaddr_notifier = {
3672 .notifier_call = bond_inetaddr_event,
3673};
3674
1da177e4
LT		 3675/*-------------------------- Packet type handling ---------------------------*/
3676
3677/* register to receive lacpdus on a bond */
3678static void bond_register_lacpdu(struct bonding *bond)
3679{
3680 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3681
3682 /* initialize packet type */
3683 pk_type->type = PKT_TYPE_LACPDU;
3684 pk_type->dev = bond->dev;
3685 pk_type->func = bond_3ad_lacpdu_recv;
3686
3687 dev_add_pack(pk_type);
3688}
3689
3690/* unregister to receive lacpdus on a bond */
3691static void bond_unregister_lacpdu(struct bonding *bond)
3692{
3693 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3694}
3695
f5b2b966
JV		 3696void bond_register_arp(struct bonding *bond)
3697{
3698 struct packet_type *pt = &bond->arp_mon_pt;
3699
c4f283b1
JV		 3700 if (pt->type)
3701 return;
3702
f5b2b966 3703 pt->type = htons(ETH_P_ARP);
e245cb71 3704 pt->dev = bond->dev;
f5b2b966
JV		 3705 pt->func = bond_arp_rcv;
3706 dev_add_pack(pt);
3707}
3708
3709void bond_unregister_arp(struct bonding *bond)
3710{
c4f283b1
JV		 3711 struct packet_type *pt = &bond->arp_mon_pt;
3712
3713 dev_remove_pack(pt);
3714 pt->type = 0;
f5b2b966
JV		 3715}
3716
169a3e66
JV		 3717/*---------------------------- Hashing Policies -----------------------------*/
3718
6f6652be
JV		 3719/*
3720 * Hash for the output device based upon layer 2 and layer 3 data. If
3721 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3722 */
3723static int bond_xmit_hash_policy_l23(struct sk_buff *skb,
3724 struct net_device *bond_dev, int count)
3725{
3726 struct ethhdr *data = (struct ethhdr *)skb->data;
3727 struct iphdr *iph = ip_hdr(skb);
3728
f14c4e4e 3729 if (skb->protocol == htons(ETH_P_IP)) {
6f6652be
JV		 3730 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
3731 (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count;
3732 }
3733
3734 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3735}
3736
169a3e66 3737/*
59c51591 3738 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3739 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3740 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3741 */
3742static int bond_xmit_hash_policy_l34(struct sk_buff *skb,
3743 struct net_device *bond_dev, int count)
3744{
3745 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3746 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3747 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3748 int layer4_xor = 0;
3749
f14c4e4e
BH		 3750 if (skb->protocol == htons(ETH_P_IP)) {
3751 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
169a3e66
JV		 3752 (iph->protocol == IPPROTO_TCP ||
3753 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3754 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3755 }
3756 return (layer4_xor ^
3757 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3758
3759 }
3760
3761 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3762}
3763
3764/*
3765 * Hash for the output device based upon layer 2 data
3766 */
3767static int bond_xmit_hash_policy_l2(struct sk_buff *skb,
3768 struct net_device *bond_dev, int count)
3769{
3770 struct ethhdr *data = (struct ethhdr *)skb->data;
3771
3772 return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count;
3773}
3774
1da177e4
LT		 3775/*-------------------------- Device entry points ----------------------------*/
3776
3777static int bond_open(struct net_device *bond_dev)
3778{
454d7c9b 3779 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3780
3781 bond->kill_timers = 0;
3782
58402054 3783 if (bond_is_lb(bond)) {
1da177e4
LT		 3784 /* bond_alb_initialize must be called before the timer
3785 * is started.
3786 */
3787 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3788 /* something went wrong - fail the open operation */
3789 return -1;
3790 }
3791
1b76b316
JV		 3792 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3793 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3794 }
3795
3796 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3797 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3798 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3799 }
3800
3801 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3802 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3803 INIT_DELAYED_WORK(&bond->arp_work,
3804 bond_activebackup_arp_mon);
3805 else
3806 INIT_DELAYED_WORK(&bond->arp_work,
3807 bond_loadbalance_arp_mon);
3808
3809 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3810 if (bond->params.arp_validate)
3811 bond_register_arp(bond);
1da177e4
LT		 3812 }
3813
3814 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3815 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3816 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3817 /* register to receive LACPDUs */
3818 bond_register_lacpdu(bond);
fd989c83 3819 bond_3ad_initiate_agg_selection(bond, 1);
1da177e4
LT		 3820 }
3821
3822 return 0;
3823}
3824
3825static int bond_close(struct net_device *bond_dev)
3826{
454d7c9b 3827 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3828
3829 if (bond->params.mode == BOND_MODE_8023AD) {
3830 /* Unregister the receive of LACPDUs */
3831 bond_unregister_lacpdu(bond);
3832 }
3833
f5b2b966
JV		 3834 if (bond->params.arp_validate)
3835 bond_unregister_arp(bond);
3836
1da177e4
LT		 3837 write_lock_bh(&bond->lock);
3838
b59f9f74 3839 bond->send_grat_arp = 0;
305d552a 3840 bond->send_unsol_na = 0;
1da177e4
LT		 3841
3842 /* signal timers not to re-arm */
3843 bond->kill_timers = 1;
3844
3845 write_unlock_bh(&bond->lock);
3846
1da177e4 3847 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3848 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3849 }
3850
3851 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3852 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3853 }
3854
3855 switch (bond->params.mode) {
3856 case BOND_MODE_8023AD:
1b76b316 3857 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3858 break;
3859 case BOND_MODE_TLB:
3860 case BOND_MODE_ALB:
1b76b316 3861 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3862 break;
3863 default:
3864 break;
3865 }
3866
1da177e4 3867
58402054 3868 if (bond_is_lb(bond)) {
1da177e4
LT		 3869 /* Must be called only after all
3870 * slaves have been released
3871 */
3872 bond_alb_deinitialize(bond);
3873 }
3874
3875 return 0;
3876}
3877
3878static struct net_device_stats *bond_get_stats(struct net_device *bond_dev)
3879{
454d7c9b 3880 struct bonding *bond = netdev_priv(bond_dev);
eeda3fd6 3881 struct net_device_stats *stats = &bond->stats;
2439f9eb 3882 struct net_device_stats local_stats;
1da177e4
LT		 3883 struct slave *slave;
3884 int i;
3885
2439f9eb 3886 memset(&local_stats, 0, sizeof(struct net_device_stats));
1da177e4
LT		 3887
3888 read_lock_bh(&bond->lock);
3889
3890 bond_for_each_slave(bond, slave, i) {
eeda3fd6
SH		 3891 const struct net_device_stats *sstats = dev_get_stats(slave->dev);
3892
2439f9eb
AG		 3893 local_stats.rx_packets += sstats->rx_packets;
3894 local_stats.rx_bytes += sstats->rx_bytes;
3895 local_stats.rx_errors += sstats->rx_errors;
3896 local_stats.rx_dropped += sstats->rx_dropped;
3897
3898 local_stats.tx_packets += sstats->tx_packets;
3899 local_stats.tx_bytes += sstats->tx_bytes;
3900 local_stats.tx_errors += sstats->tx_errors;
3901 local_stats.tx_dropped += sstats->tx_dropped;
3902
3903 local_stats.multicast += sstats->multicast;
3904 local_stats.collisions += sstats->collisions;
3905
3906 local_stats.rx_length_errors += sstats->rx_length_errors;
3907 local_stats.rx_over_errors += sstats->rx_over_errors;
3908 local_stats.rx_crc_errors += sstats->rx_crc_errors;
3909 local_stats.rx_frame_errors += sstats->rx_frame_errors;
3910 local_stats.rx_fifo_errors += sstats->rx_fifo_errors;
3911 local_stats.rx_missed_errors += sstats->rx_missed_errors;
3912
3913 local_stats.tx_aborted_errors += sstats->tx_aborted_errors;
3914 local_stats.tx_carrier_errors += sstats->tx_carrier_errors;
3915 local_stats.tx_fifo_errors += sstats->tx_fifo_errors;
3916 local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3917 local_stats.tx_window_errors += sstats->tx_window_errors;
3918 }
3919
3920 memcpy(stats, &local_stats, sizeof(struct net_device_stats));
1da177e4
LT		 3921
3922 read_unlock_bh(&bond->lock);
3923
3924 return stats;
3925}
3926
3927static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3928{
3929 struct net_device *slave_dev = NULL;
3930 struct ifbond k_binfo;
3931 struct ifbond __user *u_binfo = NULL;
3932 struct ifslave k_sinfo;
3933 struct ifslave __user *u_sinfo = NULL;
3934 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3935 int res = 0;
3936
5a03cdb7 3937 pr_debug("bond_ioctl: master=%s, cmd=%d\n",
1da177e4
LT		 3938 bond_dev->name, cmd);
3939
3940 switch (cmd) {
1da177e4
LT		 3941 case SIOCGMIIPHY:
3942 mii = if_mii(ifr);
3943 if (!mii) {
3944 return -EINVAL;
3945 }
3946 mii->phy_id = 0;
3947 /* Fall Through */
3948 case SIOCGMIIREG:
3949 /*
3950 * We do this again just in case we were called by SIOCGMIIREG
3951 * instead of SIOCGMIIPHY.
3952 */
3953 mii = if_mii(ifr);
3954 if (!mii) {
3955 return -EINVAL;
3956 }
3957
3958 if (mii->reg_num == 1) {
454d7c9b 3959 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 3960 mii->val_out = 0;
6603a6f2 3961 read_lock(&bond->lock);
1da177e4 3962 read_lock(&bond->curr_slave_lock);
4e140079 3963 if (netif_carrier_ok(bond->dev)) {
1da177e4
LT		 3964 mii->val_out = BMSR_LSTATUS;
3965 }
3966 read_unlock(&bond->curr_slave_lock);
6603a6f2 3967 read_unlock(&bond->lock);
1da177e4
LT		 3968 }
3969
3970 return 0;
3971 case BOND_INFO_QUERY_OLD:
3972 case SIOCBONDINFOQUERY:
3973 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3974
3975 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) {
3976 return -EFAULT;
3977 }
3978
3979 res = bond_info_query(bond_dev, &k_binfo);
3980 if (res == 0) {
3981 if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) {
3982 return -EFAULT;
3983 }
3984 }
3985
3986 return res;
3987 case BOND_SLAVE_INFO_QUERY_OLD:
3988 case SIOCBONDSLAVEINFOQUERY:
3989 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3990
3991 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) {
3992 return -EFAULT;
3993 }
3994
3995 res = bond_slave_info_query(bond_dev, &k_sinfo);
3996 if (res == 0) {
3997 if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) {
3998 return -EFAULT;
3999 }
4000 }
4001
4002 return res;
4003 default:
4004 /* Go on */
4005 break;
4006 }
4007
4008 if (!capable(CAP_NET_ADMIN)) {
4009 return -EPERM;
4010 }
4011
b76cdba9 4012 down_write(&(bonding_rwsem));
881d966b 4013 slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave);
1da177e4 4014
5a03cdb7 4015 pr_debug("slave_dev=%p: \n", slave_dev);
1da177e4
LT		 4016
4017 if (!slave_dev) {
4018 res = -ENODEV;
4019 } else {
5a03cdb7 4020 pr_debug("slave_dev->name=%s: \n", slave_dev->name);
1da177e4
LT		 4021 switch (cmd) {
4022 case BOND_ENSLAVE_OLD:
4023 case SIOCBONDENSLAVE:
4024 res = bond_enslave(bond_dev, slave_dev);
4025 break;
4026 case BOND_RELEASE_OLD:
4027 case SIOCBONDRELEASE:
4028 res = bond_release(bond_dev, slave_dev);
4029 break;
4030 case BOND_SETHWADDR_OLD:
4031 case SIOCBONDSETHWADDR:
4032 res = bond_sethwaddr(bond_dev, slave_dev);
4033 break;
4034 case BOND_CHANGE_ACTIVE_OLD:
4035 case SIOCBONDCHANGEACTIVE:
4036 res = bond_ioctl_change_active(bond_dev, slave_dev);
4037 break;
4038 default:
4039 res = -EOPNOTSUPP;
4040 }
4041
4042 dev_put(slave_dev);
4043 }
4044
b76cdba9 4045 up_write(&(bonding_rwsem));
1da177e4
LT		 4046 return res;
4047}
4048
4049static void bond_set_multicast_list(struct net_device *bond_dev)
4050{
454d7c9b 4051 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4052 struct dev_mc_list *dmi;
4053
1da177e4
LT		 4054 /*
4055 * Do promisc before checking multicast_mode
4056 */
4057 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) {
7e1a1ac1
WC		 4058 /*
4059 * FIXME: Need to handle the error when one of the multi-slaves
4060 * encounters error.
4061 */
1da177e4
LT		 4062 bond_set_promiscuity(bond, 1);
4063 }
4064
4065 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) {
4066 bond_set_promiscuity(bond, -1);
4067 }
4068
4069 /* set allmulti flag to slaves */
4070 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) {
7e1a1ac1
WC		 4071 /*
4072 * FIXME: Need to handle the error when one of the multi-slaves
4073 * encounters error.
4074 */
1da177e4
LT		 4075 bond_set_allmulti(bond, 1);
4076 }
4077
4078 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) {
4079 bond_set_allmulti(bond, -1);
4080 }
4081
80ee5ad2
JV		 4082 read_lock(&bond->lock);
4083
1da177e4
LT		 4084 bond->flags = bond_dev->flags;
4085
4086 /* looking for addresses to add to slaves' mc list */
4087 for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) {
4088 if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) {
4089 bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4090 }
4091 }
4092
4093 /* looking for addresses to delete from slaves' list */
4094 for (dmi = bond->mc_list; dmi; dmi = dmi->next) {
4095 if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) {
4096 bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen);
4097 }
4098 }
4099
4100 /* save master's multicast list */
4101 bond_mc_list_destroy(bond);
4102 bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC);
4103
80ee5ad2 4104 read_unlock(&bond->lock);
1da177e4
LT		 4105}
4106
00829823
SH		 4107static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4108{
4109 struct bonding *bond = netdev_priv(dev);
4110 struct slave *slave = bond->first_slave;
4111
4112 if (slave) {
4113 const struct net_device_ops *slave_ops
4114 = slave->dev->netdev_ops;
4115 if (slave_ops->ndo_neigh_setup)
72e2240f 4116 return slave_ops->ndo_neigh_setup(slave->dev, parms);
00829823
SH		 4117 }
4118 return 0;
4119}
4120
1da177e4
LT		 4121/*
4122 * Change the MTU of all of a master's slaves to match the master
4123 */
4124static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4125{
454d7c9b 4126 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4127 struct slave *slave, *stop_at;
4128 int res = 0;
4129 int i;
4130
5a03cdb7 4131 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
1da177e4
LT		 4132 (bond_dev ? bond_dev->name : "None"), new_mtu);
4133
4134 /* Can't hold bond->lock with bh disabled here since
4135 * some base drivers panic. On the other hand we can't
4136 * hold bond->lock without bh disabled because we'll
4137 * deadlock. The only solution is to rely on the fact
4138 * that we're under rtnl_lock here, and the slaves
4139 * list won't change. This doesn't solve the problem
4140 * of setting the slave's MTU while it is
4141 * transmitting, but the assumption is that the base
4142 * driver can handle that.
4143 *
4144 * TODO: figure out a way to safely iterate the slaves
4145 * list, but without holding a lock around the actual
4146 * call to the base driver.
4147 */
4148
4149 bond_for_each_slave(bond, slave, i) {
5a03cdb7 4150 pr_debug("s %p s->p %p c_m %p\n", slave,
53a3294e 4151 slave->prev, slave->dev->netdev_ops->ndo_change_mtu);
e944ef79 4152
1da177e4
LT		 4153 res = dev_set_mtu(slave->dev, new_mtu);
4154
4155 if (res) {
4156 /* If we failed to set the slave's mtu to the new value
4157 * we must abort the operation even in ACTIVE_BACKUP
4158 * mode, because if we allow the backup slaves to have
4159 * different mtu values than the active slave we'll
4160 * need to change their mtu when doing a failover. That
4161 * means changing their mtu from timer context, which
4162 * is probably not a good idea.
4163 */
5a03cdb7 4164 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT		 4165 goto unwind;
4166 }
4167 }
4168
4169 bond_dev->mtu = new_mtu;
4170
4171 return 0;
4172
4173unwind:
4174 /* unwind from head to the slave that failed */
4175 stop_at = slave;
4176 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4177 int tmp_res;
4178
4179 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4180 if (tmp_res) {
5a03cdb7 4181 pr_debug("unwind err %d dev %s\n", tmp_res,
1da177e4
LT		 4182 slave->dev->name);
4183 }
4184 }
4185
4186 return res;
4187}
4188
4189/*
4190 * Change HW address
4191 *
4192 * Note that many devices must be down to change the HW address, and
4193 * downing the master releases all slaves. We can make bonds full of
4194 * bonding devices to test this, however.
4195 */
4196static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4197{
454d7c9b 4198 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4199 struct sockaddr *sa = addr, tmp_sa;
4200 struct slave *slave, *stop_at;
4201 int res = 0;
4202 int i;
4203
eb7cc59a
SH		 4204 if (bond->params.mode == BOND_MODE_ALB)
4205 return bond_alb_set_mac_address(bond_dev, addr);
4206
4207
5a03cdb7 4208 pr_debug("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None"));
1da177e4 4209
dd957c57 4210 /*
3915c1e8
JV		 4211 * If fail_over_mac is set to active, do nothing and return
4212 * success. Returning an error causes ifenslave to fail.
dd957c57 4213 */
3915c1e8 4214 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
dd957c57 4215 return 0;
2ab82852 4216
1da177e4
LT		 4217 if (!is_valid_ether_addr(sa->sa_data)) {
4218 return -EADDRNOTAVAIL;
4219 }
4220
4221 /* Can't hold bond->lock with bh disabled here since
4222 * some base drivers panic. On the other hand we can't
4223 * hold bond->lock without bh disabled because we'll
4224 * deadlock. The only solution is to rely on the fact
4225 * that we're under rtnl_lock here, and the slaves
4226 * list won't change. This doesn't solve the problem
4227 * of setting the slave's hw address while it is
4228 * transmitting, but the assumption is that the base
4229 * driver can handle that.
4230 *
4231 * TODO: figure out a way to safely iterate the slaves
4232 * list, but without holding a lock around the actual
4233 * call to the base driver.
4234 */
4235
4236 bond_for_each_slave(bond, slave, i) {
eb7cc59a 4237 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
5a03cdb7 4238 pr_debug("slave %p %s\n", slave, slave->dev->name);
1da177e4 4239
eb7cc59a 4240 if (slave_ops->ndo_set_mac_address == NULL) {
1da177e4 4241 res = -EOPNOTSUPP;
5a03cdb7 4242 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
1da177e4
LT		 4243 goto unwind;
4244 }
4245
4246 res = dev_set_mac_address(slave->dev, addr);
4247 if (res) {
4248 /* TODO: consider downing the slave
4249 * and retry ?
4250 * User should expect communications
4251 * breakage anyway until ARP finish
4252 * updating, so...
4253 */
5a03cdb7 4254 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT		 4255 goto unwind;
4256 }
4257 }
4258
4259 /* success */
4260 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4261 return 0;
4262
4263unwind:
4264 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4265 tmp_sa.sa_family = bond_dev->type;
4266
4267 /* unwind from head to the slave that failed */
4268 stop_at = slave;
4269 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4270 int tmp_res;
4271
4272 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4273 if (tmp_res) {
5a03cdb7 4274 pr_debug("unwind err %d dev %s\n", tmp_res,
1da177e4
LT		 4275 slave->dev->name);
4276 }
4277 }
4278
4279 return res;
4280}
4281
4282static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4283{
454d7c9b 4284 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4285 struct slave *slave, *start_at;
cf5f9044 4286 int i, slave_no, res = 1;
1da177e4
LT		 4287
4288 read_lock(&bond->lock);
4289
4290 if (!BOND_IS_OK(bond)) {
4291 goto out;
4292 }
4293
cf5f9044
JV		 4294 /*
4295 * Concurrent TX may collide on rr_tx_counter; we accept that
4296 * as being rare enough not to justify using an atomic op here
4297 */
4298 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
1da177e4 4299
cf5f9044
JV		 4300 bond_for_each_slave(bond, slave, i) {
4301 slave_no--;
4302 if (slave_no < 0) {
4303 break;
4304 }
1da177e4
LT		 4305 }
4306
cf5f9044 4307 start_at = slave;
1da177e4
LT		 4308 bond_for_each_slave_from(bond, slave, i, start_at) {
4309 if (IS_UP(slave->dev) &&
4310 (slave->link == BOND_LINK_UP) &&
4311 (slave->state == BOND_STATE_ACTIVE)) {
4312 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4313 break;
4314 }
4315 }
4316
1da177e4
LT		 4317out:
4318 if (res) {
4319 /* no suitable interface, frame not sent */
4320 dev_kfree_skb(skb);
4321 }
4322 read_unlock(&bond->lock);
4323 return 0;
4324}
4325
075897ce 4326
1da177e4
LT		 4327/*
4328 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4329 * the bond has a usable interface.
4330 */
4331static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4332{
454d7c9b 4333 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4334 int res = 1;
4335
1da177e4
LT		 4336 read_lock(&bond->lock);
4337 read_lock(&bond->curr_slave_lock);
4338
4339 if (!BOND_IS_OK(bond)) {
4340 goto out;
4341 }
4342
075897ce
JL		 4343 if (!bond->curr_active_slave)
4344 goto out;
4345
075897ce
JL		 4346 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4347
1da177e4
LT		 4348out:
4349 if (res) {
4350 /* no suitable interface, frame not sent */
4351 dev_kfree_skb(skb);
4352 }
4353 read_unlock(&bond->curr_slave_lock);
4354 read_unlock(&bond->lock);
4355 return 0;
4356}
4357
4358/*
169a3e66
JV		 4359 * In bond_xmit_xor() , we determine the output device by using a pre-
4360 * determined xmit_hash_policy(), If the selected device is not enabled,
4361 * find the next active slave.
1da177e4
LT		 4362 */
4363static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4364{
454d7c9b 4365 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4366 struct slave *slave, *start_at;
4367 int slave_no;
4368 int i;
4369 int res = 1;
4370
4371 read_lock(&bond->lock);
4372
4373 if (!BOND_IS_OK(bond)) {
4374 goto out;
4375 }
4376
169a3e66 4377 slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt);
1da177e4
LT		 4378
4379 bond_for_each_slave(bond, slave, i) {
4380 slave_no--;
4381 if (slave_no < 0) {
4382 break;
4383 }
4384 }
4385
4386 start_at = slave;
4387
4388 bond_for_each_slave_from(bond, slave, i, start_at) {
4389 if (IS_UP(slave->dev) &&
4390 (slave->link == BOND_LINK_UP) &&
4391 (slave->state == BOND_STATE_ACTIVE)) {
4392 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4393 break;
4394 }
4395 }
4396
4397out:
4398 if (res) {
4399 /* no suitable interface, frame not sent */
4400 dev_kfree_skb(skb);
4401 }
4402 read_unlock(&bond->lock);
4403 return 0;
4404}
4405
4406/*
4407 * in broadcast mode, we send everything to all usable interfaces.
4408 */
4409static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4410{
454d7c9b 4411 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4412 struct slave *slave, *start_at;
4413 struct net_device *tx_dev = NULL;
4414 int i;
4415 int res = 1;
4416
4417 read_lock(&bond->lock);
4418
4419 if (!BOND_IS_OK(bond)) {
4420 goto out;
4421 }
4422
4423 read_lock(&bond->curr_slave_lock);
4424 start_at = bond->curr_active_slave;
4425 read_unlock(&bond->curr_slave_lock);
4426
4427 if (!start_at) {
4428 goto out;
4429 }
4430
4431 bond_for_each_slave_from(bond, slave, i, start_at) {
4432 if (IS_UP(slave->dev) &&
4433 (slave->link == BOND_LINK_UP) &&
4434 (slave->state == BOND_STATE_ACTIVE)) {
4435 if (tx_dev) {
4436 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4437 if (!skb2) {
4438 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4439 ": %s: Error: bond_xmit_broadcast(): "
4440 "skb_clone() failed\n",
4441 bond_dev->name);
1da177e4
LT		 4442 continue;
4443 }
4444
4445 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4446 if (res) {
4447 dev_kfree_skb(skb2);
4448 continue;
4449 }
4450 }
4451 tx_dev = slave->dev;
4452 }
4453 }
4454
4455 if (tx_dev) {
4456 res = bond_dev_queue_xmit(bond, skb, tx_dev);
4457 }
4458
4459out:
4460 if (res) {
4461 /* no suitable interface, frame not sent */
4462 dev_kfree_skb(skb);
4463 }
4464 /* frame sent to all suitable interfaces */
4465 read_unlock(&bond->lock);
4466 return 0;
4467}
4468
4469/*------------------------- Device initialization ---------------------------*/
4470
6f6652be
JV		 4471static void bond_set_xmit_hash_policy(struct bonding *bond)
4472{
4473 switch (bond->params.xmit_policy) {
4474 case BOND_XMIT_POLICY_LAYER23:
4475 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4476 break;
4477 case BOND_XMIT_POLICY_LAYER34:
4478 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4479 break;
4480 case BOND_XMIT_POLICY_LAYER2:
4481 default:
4482 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4483 break;
4484 }
4485}
4486
00829823
SH		 4487static int bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
4488{
4489 const struct bonding *bond = netdev_priv(dev);
4490
4491 switch (bond->params.mode) {
4492 case BOND_MODE_ROUNDROBIN:
4493 return bond_xmit_roundrobin(skb, dev);
4494 case BOND_MODE_ACTIVEBACKUP:
4495 return bond_xmit_activebackup(skb, dev);
4496 case BOND_MODE_XOR:
4497 return bond_xmit_xor(skb, dev);
4498 case BOND_MODE_BROADCAST:
4499 return bond_xmit_broadcast(skb, dev);
4500 case BOND_MODE_8023AD:
4501 return bond_3ad_xmit_xor(skb, dev);
4502 case BOND_MODE_ALB:
4503 case BOND_MODE_TLB:
4504 return bond_alb_xmit(skb, dev);
4505 default:
4506 /* Should never happen, mode already checked */
4507 printk(KERN_ERR DRV_NAME ": %s: Error: Unknown bonding mode %d\n",
4508 dev->name, bond->params.mode);
4509 WARN_ON_ONCE(1);
4510 dev_kfree_skb(skb);
4511 return NETDEV_TX_OK;
4512 }
4513}
4514
4515
1da177e4
LT		 4516/*
4517 * set bond mode specific net device operations
4518 */
a77b5325 4519void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4520{
169a3e66
JV		 4521 struct net_device *bond_dev = bond->dev;
4522
1da177e4
LT		 4523 switch (mode) {
4524 case BOND_MODE_ROUNDROBIN:
1da177e4
LT		 4525 break;
4526 case BOND_MODE_ACTIVEBACKUP:
1da177e4
LT		 4527 break;
4528 case BOND_MODE_XOR:
6f6652be 4529 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4530 break;
4531 case BOND_MODE_BROADCAST:
1da177e4
LT		 4532 break;
4533 case BOND_MODE_8023AD:
8f903c70 4534 bond_set_master_3ad_flags(bond);
6f6652be 4535 bond_set_xmit_hash_policy(bond);
1da177e4 4536 break;
1da177e4 4537 case BOND_MODE_ALB:
8f903c70
JV		 4538 bond_set_master_alb_flags(bond);
4539 /* FALLTHRU */
4540 case BOND_MODE_TLB:
1da177e4
LT		 4541 break;
4542 default:
4543 /* Should never happen, mode already checked */
4544 printk(KERN_ERR DRV_NAME
4e0952c7
MW		 4545 ": %s: Error: Unknown bonding mode %d\n",
4546 bond_dev->name,
1da177e4
LT		 4547 mode);
4548 break;
4549 }
4550}
4551
217df670
JV		 4552static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4553 struct ethtool_drvinfo *drvinfo)
4554{
4555 strncpy(drvinfo->driver, DRV_NAME, 32);
4556 strncpy(drvinfo->version, DRV_VERSION, 32);
4557 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4558}
4559
7282d491 4560static const struct ethtool_ops bond_ethtool_ops = {
217df670 4561 .get_drvinfo = bond_ethtool_get_drvinfo,
fa53ebac
SH		 4562 .get_link = ethtool_op_get_link,
4563 .get_tx_csum = ethtool_op_get_tx_csum,
4564 .get_sg = ethtool_op_get_sg,
4565 .get_tso = ethtool_op_get_tso,
4566 .get_ufo = ethtool_op_get_ufo,
4567 .get_flags = ethtool_op_get_flags,
8531c5ff
AK		 4568};
4569
eb7cc59a
SH		 4570static const struct net_device_ops bond_netdev_ops = {
4571 .ndo_open = bond_open,
4572 .ndo_stop = bond_close,
00829823 4573 .ndo_start_xmit = bond_start_xmit,
eb7cc59a
SH		 4574 .ndo_get_stats = bond_get_stats,
4575 .ndo_do_ioctl = bond_do_ioctl,
4576 .ndo_set_multicast_list = bond_set_multicast_list,
4577 .ndo_change_mtu = bond_change_mtu,
eb7cc59a 4578 .ndo_set_mac_address = bond_set_mac_address,
00829823 4579 .ndo_neigh_setup = bond_neigh_setup,
eb7cc59a
SH		 4580 .ndo_vlan_rx_register = bond_vlan_rx_register,
4581 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4582 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
4583};
4584
1da177e4
LT		 4585/*
4586 * Does not allocate but creates a /proc entry.
4587 * Allowed to fail.
4588 */
3c535952 4589static int bond_init(struct net_device *bond_dev, struct bond_params *params)
1da177e4 4590{
454d7c9b 4591 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4592
5a03cdb7 4593 pr_debug("Begin bond_init for %s\n", bond_dev->name);
1da177e4
LT		 4594
4595 /* initialize rwlocks */
4596 rwlock_init(&bond->lock);
4597 rwlock_init(&bond->curr_slave_lock);
4598
4599 bond->params = *params; /* copy params struct */
4600
1b76b316
JV		 4601 bond->wq = create_singlethread_workqueue(bond_dev->name);
4602 if (!bond->wq)
4603 return -ENOMEM;
4604
1da177e4
LT		 4605 /* Initialize pointers */
4606 bond->first_slave = NULL;
4607 bond->curr_active_slave = NULL;
4608 bond->current_arp_slave = NULL;
4609 bond->primary_slave = NULL;
4610 bond->dev = bond_dev;
1053f62c 4611 bond->send_grat_arp = 0;
305d552a 4612 bond->send_unsol_na = 0;
d90a162a 4613 bond->setup_by_slave = 0;
1da177e4
LT		 4614 INIT_LIST_HEAD(&bond->vlan_list);
4615
4616 /* Initialize the device entry points */
eb7cc59a 4617 bond_dev->netdev_ops = &bond_netdev_ops;
8531c5ff 4618 bond_dev->ethtool_ops = &bond_ethtool_ops;
169a3e66 4619 bond_set_mode_ops(bond, bond->params.mode);
1da177e4 4620
a434e43f 4621 bond_dev->destructor = bond_destructor;
1da177e4
LT		 4622
4623 /* Initialize the device options */
4624 bond_dev->tx_queue_len = 0;
4625 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4626 bond_dev->priv_flags |= IFF_BONDING;
6cf3f41e
JV		 4627 if (bond->params.arp_interval)
4628 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
1da177e4
LT		 4629
4630 /* At first, we block adding VLANs. That's the only way to
4631 * prevent problems that occur when adding VLANs over an
4632 * empty bond. The block will be removed once non-challenged
4633 * slaves are enslaved.
4634 */
4635 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4636
932ff279 4637 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4638 * transmitting */
4639 bond_dev->features |= NETIF_F_LLTX;
4640
4641 /* By default, we declare the bond to be fully
4642 * VLAN hardware accelerated capable. Special
4643 * care is taken in the various xmit functions
4644 * when there are slaves that are not hw accel
4645 * capable
4646 */
1da177e4
LT		 4647 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4648 NETIF_F_HW_VLAN_RX |
4649 NETIF_F_HW_VLAN_FILTER);
4650
4651#ifdef CONFIG_PROC_FS
4652 bond_create_proc_entry(bond);
4653#endif
1da177e4
LT		 4654 list_add_tail(&bond->bond_list, &bond_dev_list);
4655
4656 return 0;
4657}
4658
fdaea7a9
JV		 4659static void bond_work_cancel_all(struct bonding *bond)
4660{
4661 write_lock_bh(&bond->lock);
4662 bond->kill_timers = 1;
4663 write_unlock_bh(&bond->lock);
4664
4665 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4666 cancel_delayed_work(&bond->mii_work);
4667
4668 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4669 cancel_delayed_work(&bond->arp_work);
4670
4671 if (bond->params.mode == BOND_MODE_ALB &&
4672 delayed_work_pending(&bond->alb_work))
4673 cancel_delayed_work(&bond->alb_work);
4674
4675 if (bond->params.mode == BOND_MODE_8023AD &&
4676 delayed_work_pending(&bond->ad_work))
4677 cancel_delayed_work(&bond->ad_work);
4678}
4679
a434e43f
JV		 4680/* De-initialize device specific data.
4681 * Caller must hold rtnl_lock.
4682 */
4683static void bond_deinit(struct net_device *bond_dev)
4684{
454d7c9b 4685 struct bonding *bond = netdev_priv(bond_dev);
a434e43f
JV		 4686
4687 list_del(&bond->bond_list);
4688
4689 bond_work_cancel_all(bond);
4690
4691#ifdef CONFIG_PROC_FS
4692 bond_remove_proc_entry(bond);
4693#endif
4694}
4695
1da177e4
LT		 4696/* Unregister and free all bond devices.
4697 * Caller must hold rtnl_lock.
4698 */
4699static void bond_free_all(void)
4700{
4701 struct bonding *bond, *nxt;
4702
4703 list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) {
4704 struct net_device *bond_dev = bond->dev;
4705
fdaea7a9 4706 bond_work_cancel_all(bond);
70298705 4707 /* Release the bonded slaves */
4708 bond_release_all(bond_dev);
92b41daa 4709 bond_destroy(bond);
1da177e4
LT		 4710 }
4711
4712#ifdef CONFIG_PROC_FS
4713 bond_destroy_proc_dir();
4714#endif
4715}
4716
4717/*------------------------- Module initialization ---------------------------*/
4718
4719/*
4720 * Convert string input module parms. Accept either the
ece95f7f
JV		 4721 * number of the mode or its string name. A bit complicated because
4722 * some mode names are substrings of other names, and calls from sysfs
4723 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4724 */
325dcf7a 4725int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
1da177e4 4726{
ece95f7f 4727 int mode = -1, i, rv;
a42e534f 4728 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
ece95f7f 4729
a42e534f
JV		 4730 for (p = (char *)buf; *p; p++)
4731 if (!(isdigit(*p) || isspace(*p)))
4732 break;
4733
4734 if (*p)
ece95f7f 4735 rv = sscanf(buf, "%20s", modestr);
a42e534f
JV		 4736 else
4737 rv = sscanf(buf, "%d", &mode);
4738
4739 if (!rv)
4740 return -1;
1da177e4
LT		 4741
4742 for (i = 0; tbl[i].modename; i++) {
ece95f7f
JV		 4743 if (mode == tbl[i].mode)
4744 return tbl[i].mode;
4745 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4746 return tbl[i].mode;
1da177e4
LT		 4747 }
4748
4749 return -1;
4750}
4751
4752static int bond_check_params(struct bond_params *params)
4753{
3915c1e8 4754 int arp_validate_value, fail_over_mac_value;
f5b2b966 4755
1da177e4
LT		 4756 /*
4757 * Convert string parameters.
4758 */
4759 if (mode) {
4760 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4761 if (bond_mode == -1) {
4762 printk(KERN_ERR DRV_NAME
4763 ": Error: Invalid bonding mode \"%s\"\n",
4764 mode == NULL ? "NULL" : mode);
4765 return -EINVAL;
4766 }
4767 }
4768
169a3e66
JV		 4769 if (xmit_hash_policy) {
4770 if ((bond_mode != BOND_MODE_XOR) &&
4771 (bond_mode != BOND_MODE_8023AD)) {
4772 printk(KERN_INFO DRV_NAME
4773 ": xor_mode param is irrelevant in mode %s\n",
4774 bond_mode_name(bond_mode));
4775 } else {
4776 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4777 xmit_hashtype_tbl);
4778 if (xmit_hashtype == -1) {
4779 printk(KERN_ERR DRV_NAME
4780 ": Error: Invalid xmit_hash_policy \"%s\"\n",
4781 xmit_hash_policy == NULL ? "NULL" :
4782 xmit_hash_policy);
4783 return -EINVAL;
4784 }
4785 }
4786 }
4787
1da177e4
LT		 4788 if (lacp_rate) {
4789 if (bond_mode != BOND_MODE_8023AD) {
4790 printk(KERN_INFO DRV_NAME
4791 ": lacp_rate param is irrelevant in mode %s\n",
4792 bond_mode_name(bond_mode));
4793 } else {
4794 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4795 if (lacp_fast == -1) {
4796 printk(KERN_ERR DRV_NAME
4797 ": Error: Invalid lacp rate \"%s\"\n",
4798 lacp_rate == NULL ? "NULL" : lacp_rate);
4799 return -EINVAL;
4800 }
4801 }
4802 }
4803
fd989c83
JV		 4804 if (ad_select) {
4805 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4806 if (params->ad_select == -1) {
4807 printk(KERN_ERR DRV_NAME
4808 ": Error: Invalid ad_select \"%s\"\n",
4809 ad_select == NULL ? "NULL" : ad_select);
4810 return -EINVAL;
4811 }
4812
4813 if (bond_mode != BOND_MODE_8023AD) {
4814 printk(KERN_WARNING DRV_NAME
4815 ": ad_select param only affects 802.3ad mode\n");
4816 }
4817 } else {
4818 params->ad_select = BOND_AD_STABLE;
4819 }
4820
b8a9787e 4821 if (max_bonds < 0 || max_bonds > INT_MAX) {
1da177e4
LT		 4822 printk(KERN_WARNING DRV_NAME
4823 ": Warning: max_bonds (%d) not in range %d-%d, so it "
4e0952c7 4824 "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
b8a9787e 4825 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT		 4826 max_bonds = BOND_DEFAULT_MAX_BONDS;
4827 }
4828
4829 if (miimon < 0) {
4830 printk(KERN_WARNING DRV_NAME
4831 ": Warning: miimon module parameter (%d), "
4832 "not in range 0-%d, so it was reset to %d\n",
4833 miimon, INT_MAX, BOND_LINK_MON_INTERV);
4834 miimon = BOND_LINK_MON_INTERV;
4835 }
4836
4837 if (updelay < 0) {
4838 printk(KERN_WARNING DRV_NAME
4839 ": Warning: updelay module parameter (%d), "
4840 "not in range 0-%d, so it was reset to 0\n",
4841 updelay, INT_MAX);
4842 updelay = 0;
4843 }
4844
4845 if (downdelay < 0) {
4846 printk(KERN_WARNING DRV_NAME
4847 ": Warning: downdelay module parameter (%d), "
4848 "not in range 0-%d, so it was reset to 0\n",
4849 downdelay, INT_MAX);
4850 downdelay = 0;
4851 }
4852
4853 if ((use_carrier != 0) && (use_carrier != 1)) {
4854 printk(KERN_WARNING DRV_NAME
4855 ": Warning: use_carrier module parameter (%d), "
4856 "not of valid value (0/1), so it was set to 1\n",
4857 use_carrier);
4858 use_carrier = 1;
4859 }
4860
7893b249
MS		 4861 if (num_grat_arp < 0 || num_grat_arp > 255) {
4862 printk(KERN_WARNING DRV_NAME
4863 ": Warning: num_grat_arp (%d) not in range 0-255 so it "
4864 "was reset to 1 \n", num_grat_arp);
4865 num_grat_arp = 1;
4866 }
4867
305d552a
BH		 4868 if (num_unsol_na < 0 || num_unsol_na > 255) {
4869 printk(KERN_WARNING DRV_NAME
4870 ": Warning: num_unsol_na (%d) not in range 0-255 so it "
4871 "was reset to 1 \n", num_unsol_na);
4872 num_unsol_na = 1;
4873 }
4874
1da177e4
LT		 4875 /* reset values for 802.3ad */
4876 if (bond_mode == BOND_MODE_8023AD) {
4877 if (!miimon) {
4878 printk(KERN_WARNING DRV_NAME
4879 ": Warning: miimon must be specified, "
4880 "otherwise bonding will not detect link "
4881 "failure, speed and duplex which are "
4882 "essential for 802.3ad operation\n");
4883 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4884 miimon = 100;
4885 }
4886 }
4887
4888 /* reset values for TLB/ALB */
4889 if ((bond_mode == BOND_MODE_TLB) ||
4890 (bond_mode == BOND_MODE_ALB)) {
4891 if (!miimon) {
4892 printk(KERN_WARNING DRV_NAME
4893 ": Warning: miimon must be specified, "
4894 "otherwise bonding will not detect link "
4895 "failure and link speed which are essential "
4896 "for TLB/ALB load balancing\n");
4897 printk(KERN_WARNING "Forcing miimon to 100msec\n");
4898 miimon = 100;
4899 }
4900 }
4901
4902 if (bond_mode == BOND_MODE_ALB) {
4903 printk(KERN_NOTICE DRV_NAME
4904 ": In ALB mode you might experience client "
4905 "disconnections upon reconnection of a link if the "
4906 "bonding module updelay parameter (%d msec) is "
4907 "incompatible with the forwarding delay time of the "
4908 "switch\n",
4909 updelay);
4910 }
4911
4912 if (!miimon) {
4913 if (updelay || downdelay) {
4914 /* just warn the user the up/down delay will have
4915 * no effect since miimon is zero...
4916 */
4917 printk(KERN_WARNING DRV_NAME
4918 ": Warning: miimon module parameter not set "
4919 "and updelay (%d) or downdelay (%d) module "
4920 "parameter is set; updelay and downdelay have "
4921 "no effect unless miimon is set\n",
4922 updelay, downdelay);
4923 }
4924 } else {
4925 /* don't allow arp monitoring */
4926 if (arp_interval) {
4927 printk(KERN_WARNING DRV_NAME
4928 ": Warning: miimon (%d) and arp_interval (%d) "
4929 "can't be used simultaneously, disabling ARP "
4930 "monitoring\n",
4931 miimon, arp_interval);
4932 arp_interval = 0;
4933 }
4934
4935 if ((updelay % miimon) != 0) {
4936 printk(KERN_WARNING DRV_NAME
4937 ": Warning: updelay (%d) is not a multiple "
4938 "of miimon (%d), updelay rounded to %d ms\n",
4939 updelay, miimon, (updelay / miimon) * miimon);
4940 }
4941
4942 updelay /= miimon;
4943
4944 if ((downdelay % miimon) != 0) {
4945 printk(KERN_WARNING DRV_NAME
4946 ": Warning: downdelay (%d) is not a multiple "
4947 "of miimon (%d), downdelay rounded to %d ms\n",
4948 downdelay, miimon,
4949 (downdelay / miimon) * miimon);
4950 }
4951
4952 downdelay /= miimon;
4953 }
4954
4955 if (arp_interval < 0) {
4956 printk(KERN_WARNING DRV_NAME
4957 ": Warning: arp_interval module parameter (%d) "
4958 ", not in range 0-%d, so it was reset to %d\n",
4959 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
4960 arp_interval = BOND_LINK_ARP_INTERV;
4961 }
4962
4963 for (arp_ip_count = 0;
4964 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4965 arp_ip_count++) {
4966 /* not complete check, but should be good enough to
4967 catch mistakes */
4968 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
4969 printk(KERN_WARNING DRV_NAME
4970 ": Warning: bad arp_ip_target module parameter "
4971 "(%s), ARP monitoring will not be performed\n",
4972 arp_ip_target[arp_ip_count]);
4973 arp_interval = 0;
4974 } else {
d3bb52b0 4975 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 4976 arp_target[arp_ip_count] = ip;
4977 }
4978 }
4979
4980 if (arp_interval && !arp_ip_count) {
4981 /* don't allow arping if no arp_ip_target given... */
4982 printk(KERN_WARNING DRV_NAME
4983 ": Warning: arp_interval module parameter (%d) "
4984 "specified without providing an arp_ip_target "
4985 "parameter, arp_interval was reset to 0\n",
4986 arp_interval);
4987 arp_interval = 0;
4988 }
4989
f5b2b966
JV		 4990 if (arp_validate) {
4991 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
4992 printk(KERN_ERR DRV_NAME
4993 ": arp_validate only supported in active-backup mode\n");
4994 return -EINVAL;
4995 }
4996 if (!arp_interval) {
4997 printk(KERN_ERR DRV_NAME
4998 ": arp_validate requires arp_interval\n");
4999 return -EINVAL;
5000 }
5001
5002 arp_validate_value = bond_parse_parm(arp_validate,
5003 arp_validate_tbl);
5004 if (arp_validate_value == -1) {
5005 printk(KERN_ERR DRV_NAME
5006 ": Error: invalid arp_validate \"%s\"\n",
5007 arp_validate == NULL ? "NULL" : arp_validate);
5008 return -EINVAL;
5009 }
5010 } else
5011 arp_validate_value = 0;
5012
1da177e4
LT		 5013 if (miimon) {
5014 printk(KERN_INFO DRV_NAME
5015 ": MII link monitoring set to %d ms\n",
5016 miimon);
5017 } else if (arp_interval) {
5018 int i;
5019
5020 printk(KERN_INFO DRV_NAME
f5b2b966
JV		 5021 ": ARP monitoring set to %d ms, validate %s, with %d target(s):",
5022 arp_interval,
5023 arp_validate_tbl[arp_validate_value].modename,
5024 arp_ip_count);
1da177e4
LT		 5025
5026 for (i = 0; i < arp_ip_count; i++)
5027 printk (" %s", arp_ip_target[i]);
5028
5029 printk("\n");
5030
b8a9787e 5031 } else if (max_bonds) {
1da177e4
LT		 5032 /* miimon and arp_interval not set, we need one so things
5033 * work as expected, see bonding.txt for details
5034 */
5035 printk(KERN_WARNING DRV_NAME
5036 ": Warning: either miimon or arp_interval and "
5037 "arp_ip_target module parameters must be specified, "
5038 "otherwise bonding will not detect link failures! see "
5039 "bonding.txt for details.\n");
5040 }
5041
5042 if (primary && !USES_PRIMARY(bond_mode)) {
5043 /* currently, using a primary only makes sense
5044 * in active backup, TLB or ALB modes
5045 */
5046 printk(KERN_WARNING DRV_NAME
5047 ": Warning: %s primary device specified but has no "
5048 "effect in %s mode\n",
5049 primary, bond_mode_name(bond_mode));
5050 primary = NULL;
5051 }
5052
3915c1e8
JV		 5053 if (fail_over_mac) {
5054 fail_over_mac_value = bond_parse_parm(fail_over_mac,
5055 fail_over_mac_tbl);
5056 if (fail_over_mac_value == -1) {
5057 printk(KERN_ERR DRV_NAME
5058 ": Error: invalid fail_over_mac \"%s\"\n",
5059 arp_validate == NULL ? "NULL" : arp_validate);
5060 return -EINVAL;
5061 }
5062
5063 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
5064 printk(KERN_WARNING DRV_NAME
5065 ": Warning: fail_over_mac only affects "
5066 "active-backup mode.\n");
5067 } else {
5068 fail_over_mac_value = BOND_FOM_NONE;
5069 }
dd957c57 5070
1da177e4
LT		 5071 /* fill params struct with the proper values */
5072 params->mode = bond_mode;
169a3e66 5073 params->xmit_policy = xmit_hashtype;
1da177e4 5074 params->miimon = miimon;
7893b249 5075 params->num_grat_arp = num_grat_arp;
305d552a 5076 params->num_unsol_na = num_unsol_na;
1da177e4 5077 params->arp_interval = arp_interval;
f5b2b966 5078 params->arp_validate = arp_validate_value;
1da177e4
LT		 5079 params->updelay = updelay;
5080 params->downdelay = downdelay;
5081 params->use_carrier = use_carrier;
5082 params->lacp_fast = lacp_fast;
5083 params->primary[0] = 0;
3915c1e8 5084 params->fail_over_mac = fail_over_mac_value;
1da177e4
LT		 5085
5086 if (primary) {
5087 strncpy(params->primary, primary, IFNAMSIZ);
5088 params->primary[IFNAMSIZ - 1] = 0;
5089 }
5090
5091 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5092
5093 return 0;
5094}
5095
0daa2303 5096static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 5097static struct lock_class_key bonding_netdev_addr_lock_key;
0daa2303 5098
e8a0464c
DM		 5099static void bond_set_lockdep_class_one(struct net_device *dev,
5100 struct netdev_queue *txq,
5101 void *_unused)
c773e847
DM		 5102{
5103 lockdep_set_class(&txq->_xmit_lock,
5104 &bonding_netdev_xmit_lock_key);
5105}
5106
5107static void bond_set_lockdep_class(struct net_device *dev)
5108{
cf508b12
DM		 5109 lockdep_set_class(&dev->addr_list_lock,
5110 &bonding_netdev_addr_lock_key);
e8a0464c 5111 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
c773e847
DM		 5112}
5113
dfe60397 5114/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 5115 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 5116 * Caller must NOT hold rtnl_lock; we need to release it here before we
5117 * set up our sysfs entries.
5118 */
0dd646fe 5119int bond_create(char *name, struct bond_params *params)
dfe60397
MW		 5120{
5121 struct net_device *bond_dev;
0883beca 5122 struct bonding *bond;
dfe60397
MW		 5123 int res;
5124
5125 rtnl_lock();
027ea041
JV		 5126 down_write(&bonding_rwsem);
5127
5128 /* Check to see if the bond already exists. */
4fe4763c 5129 if (name) {
0883beca 5130 list_for_each_entry(bond, &bond_dev_list, bond_list)
4fe4763c
JV		 5131 if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) {
5132 printk(KERN_ERR DRV_NAME
027ea041 5133 ": cannot add bond %s; it already exists\n",
4fe4763c
JV		 5134 name);
5135 res = -EPERM;
5136 goto out_rtnl;
5137 }
5138 }
027ea041 5139
e4b91c48
JV		 5140 bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "",
5141 ether_setup);
dfe60397
MW		 5142 if (!bond_dev) {
5143 printk(KERN_ERR DRV_NAME
5144 ": %s: eek! can't alloc netdev!\n",
5145 name);
5146 res = -ENOMEM;
5147 goto out_rtnl;
5148 }
5149
e4b91c48
JV		 5150 if (!name) {
5151 res = dev_alloc_name(bond_dev, "bond%d");
5152 if (res < 0)
5153 goto out_netdev;
5154 }
5155
dfe60397
MW		 5156 /* bond_init() must be called after dev_alloc_name() (for the
5157 * /proc files), but before register_netdevice(), because we
5158 * need to set function pointers.
5159 */
5160
5161 res = bond_init(bond_dev, params);
5162 if (res < 0) {
5163 goto out_netdev;
5164 }
5165
dfe60397
MW		 5166 res = register_netdevice(bond_dev);
5167 if (res < 0) {
5168 goto out_bond;
5169 }
0daa2303 5170
c773e847 5171 bond_set_lockdep_class(bond_dev);
0daa2303 5172
ff59c456
JV		 5173 netif_carrier_off(bond_dev);
5174
027ea041 5175 up_write(&bonding_rwsem);
dfe60397 5176 rtnl_unlock(); /* allows sysfs registration of net device */
454d7c9b 5177 res = bond_create_sysfs_entry(netdev_priv(bond_dev));
09c89279
JV		 5178 if (res < 0) {
5179 rtnl_lock();
027ea041 5180 down_write(&bonding_rwsem);
822973ba
PE		 5181 bond_deinit(bond_dev);
5182 unregister_netdevice(bond_dev);
5183 goto out_rtnl;
09c89279
JV		 5184 }
5185
5186 return 0;
5187
dfe60397
MW		 5188out_bond:
5189 bond_deinit(bond_dev);
5190out_netdev:
5191 free_netdev(bond_dev);
5192out_rtnl:
027ea041 5193 up_write(&bonding_rwsem);
dfe60397 5194 rtnl_unlock();
dfe60397
MW		 5195 return res;
5196}
5197
1da177e4
LT		 5198static int __init bonding_init(void)
5199{
1da177e4
LT		 5200 int i;
5201 int res;
0883beca 5202 struct bonding *bond;
1da177e4
LT		 5203
5204 printk(KERN_INFO "%s", version);
5205
dfe60397 5206 res = bond_check_params(&bonding_defaults);
1da177e4 5207 if (res) {
dfe60397 5208 goto out;
1da177e4
LT		 5209 }
5210
1da177e4
LT		 5211#ifdef CONFIG_PROC_FS
5212 bond_create_proc_dir();
5213#endif
027ea041
JV		 5214
5215 init_rwsem(&bonding_rwsem);
5216
1da177e4 5217 for (i = 0; i < max_bonds; i++) {
0dd646fe 5218 res = bond_create(NULL, &bonding_defaults);
dfe60397
MW		 5219 if (res)
5220 goto err;
1da177e4
LT		 5221 }
5222
b76cdba9
MW		 5223 res = bond_create_sysfs();
5224 if (res)
5225 goto err;
5226
1da177e4 5227 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5228 register_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5229 bond_register_ipv6_notifier();
1da177e4 5230
dfe60397
MW		 5231 goto out;
5232err:
0883beca 5233 list_for_each_entry(bond, &bond_dev_list, bond_list) {
1b76b316
JV		 5234 bond_work_cancel_all(bond);
5235 destroy_workqueue(bond->wq);
5236 }
5237
ae68c398
PE		 5238 bond_destroy_sysfs();
5239
40abc270 5240 rtnl_lock();
1da177e4 5241 bond_free_all();
1da177e4 5242 rtnl_unlock();
dfe60397 5243out:
1da177e4 5244 return res;
dfe60397 5245
1da177e4
LT		 5246}
5247
5248static void __exit bonding_exit(void)
5249{
5250 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5251 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5252 bond_unregister_ipv6_notifier();
1da177e4 5253
ae68c398
PE		 5254 bond_destroy_sysfs();
5255
1da177e4
LT		 5256 rtnl_lock();
5257 bond_free_all();
5258 rtnl_unlock();
5259}
5260
5261module_init(bonding_init);
5262module_exit(bonding_exit);
5263MODULE_LICENSE("GPL");
5264MODULE_VERSION(DRV_VERSION);
5265MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5266MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
5267MODULE_SUPPORTED_DEVICE("most ethernet devices");
5268
5269/*
5270 * Local variables:
5271 * c-indent-level: 8
5272 * c-basic-offset: 8
5273 * tab-width: 8
5274 * End:
5275 */
5276
Clone of davem's net-next-2.6 tree