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[net-next-2.6.git] / drivers / net / bonding / bond_main.c
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1da177e4
LT		 1/*
2 * originally based on the dummy device.
3 *
4 * Copyright 1999, Thomas Davis, tadavis@lbl.gov.
5 * Licensed under the GPL. Based on dummy.c, and eql.c devices.
6 *
7 * bonding.c: an Ethernet Bonding driver
8 *
9 * This is useful to talk to a Cisco EtherChannel compatible equipment:
10 * Cisco 5500
11 * Sun Trunking (Solaris)
12 * Alteon AceDirector Trunks
13 * Linux Bonding
14 * and probably many L2 switches ...
15 *
16 * How it works:
17 * ifconfig bond0 ipaddress netmask up
18 * will setup a network device, with an ip address. No mac address
19 * will be assigned at this time. The hw mac address will come from
20 * the first slave bonded to the channel. All slaves will then use
21 * this hw mac address.
22 *
23 * ifconfig bond0 down
24 * will release all slaves, marking them as down.
25 *
26 * ifenslave bond0 eth0
27 * will attach eth0 to bond0 as a slave. eth0 hw mac address will either
28 * a: be used as initial mac address
29 * b: if a hw mac address already is there, eth0's hw mac address
30 * will then be set from bond0.
31 *
1da177e4
LT		 32 */
33
a4aee5c8
JP		 34#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35
1da177e4
LT		 36#include <linux/kernel.h>
37#include <linux/module.h>
1da177e4
LT		 38#include <linux/types.h>
39#include <linux/fcntl.h>
40#include <linux/interrupt.h>
41#include <linux/ptrace.h>
42#include <linux/ioport.h>
43#include <linux/in.h>
169a3e66 44#include <net/ip.h>
1da177e4 45#include <linux/ip.h>
169a3e66
JV		 46#include <linux/tcp.h>
47#include <linux/udp.h>
1da177e4
LT		 48#include <linux/slab.h>
49#include <linux/string.h>
50#include <linux/init.h>
51#include <linux/timer.h>
52#include <linux/socket.h>
53#include <linux/ctype.h>
54#include <linux/inet.h>
55#include <linux/bitops.h>
3d632c3f 56#include <linux/io.h>
1da177e4 57#include <asm/system.h>
1da177e4 58#include <asm/dma.h>
3d632c3f 59#include <linux/uaccess.h>
1da177e4
LT		 60#include <linux/errno.h>
61#include <linux/netdevice.h>
f6dc31a8 62#include <linux/netpoll.h>
1da177e4 63#include <linux/inetdevice.h>
a816c7c7 64#include <linux/igmp.h>
1da177e4
LT		 65#include <linux/etherdevice.h>
66#include <linux/skbuff.h>
67#include <net/sock.h>
68#include <linux/rtnetlink.h>
69#include <linux/proc_fs.h>
70#include <linux/seq_file.h>
71#include <linux/smp.h>
72#include <linux/if_ether.h>
73#include <net/arp.h>
74#include <linux/mii.h>
75#include <linux/ethtool.h>
76#include <linux/if_vlan.h>
77#include <linux/if_bonding.h>
b63bb739 78#include <linux/jiffies.h>
c3ade5ca 79#include <net/route.h>
457c4cbc 80#include <net/net_namespace.h>
ec87fd3b 81#include <net/netns/generic.h>
1da177e4
LT		 82#include "bonding.h"
83#include "bond_3ad.h"
84#include "bond_alb.h"
85
86/*---------------------------- Module parameters ----------------------------*/
87
88/* monitor all links that often (in milliseconds). <=0 disables monitoring */
89#define BOND_LINK_MON_INTERV 0
90#define BOND_LINK_ARP_INTERV 0
91
92static int max_bonds = BOND_DEFAULT_MAX_BONDS;
bb1d9123 93static int tx_queues = BOND_DEFAULT_TX_QUEUES;
7893b249 94static int num_grat_arp = 1;
305d552a 95static int num_unsol_na = 1;
1da177e4 96static int miimon = BOND_LINK_MON_INTERV;
3d632c3f
SH		 97static int updelay;
98static int downdelay;
1da177e4 99static int use_carrier = 1;
3d632c3f
SH		 100static char *mode;
101static char *primary;
a549952a 102static char *primary_reselect;
3d632c3f
SH		 103static char *lacp_rate;
104static char *ad_select;
105static char *xmit_hash_policy;
1da177e4 106static int arp_interval = BOND_LINK_ARP_INTERV;
3d632c3f
SH		 107static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
108static char *arp_validate;
109static char *fail_over_mac;
ebd8e497 110static int all_slaves_active = 0;
d2991f75 111static struct bond_params bonding_defaults;
c2952c31 112static int resend_igmp = BOND_DEFAULT_RESEND_IGMP;
1da177e4
LT		 113
114module_param(max_bonds, int, 0);
115MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
bb1d9123
AG		 116module_param(tx_queues, int, 0);
117MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
7893b249
MS		 118module_param(num_grat_arp, int, 0644);
119MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
305d552a
BH		 120module_param(num_unsol_na, int, 0644);
121MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
1da177e4
LT		 122module_param(miimon, int, 0);
123MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
124module_param(updelay, int, 0);
125MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
126module_param(downdelay, int, 0);
2ac47660
MW		 127MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
128 "in milliseconds");
1da177e4 129module_param(use_carrier, int, 0);
2ac47660
MW		 130MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
131 "0 for off, 1 for on (default)");
1da177e4 132module_param(mode, charp, 0);
2ac47660
MW		 133MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
134 "1 for active-backup, 2 for balance-xor, "
135 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
136 "6 for balance-alb");
1da177e4
LT		 137module_param(primary, charp, 0);
138MODULE_PARM_DESC(primary, "Primary network device to use");
a549952a
JP		 139module_param(primary_reselect, charp, 0);
140MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
141 "once it comes up; "
142 "0 for always (default), "
143 "1 for only if speed of primary is "
144 "better, "
145 "2 for only on active slave "
146 "failure");
1da177e4 147module_param(lacp_rate, charp, 0);
2ac47660
MW		 148MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
149 "(slow/fast)");
fd989c83
JV		 150module_param(ad_select, charp, 0);
151MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
169a3e66 152module_param(xmit_hash_policy, charp, 0);
2ac47660
MW		 153MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
154 ", 1 for layer 3+4");
1da177e4
LT		 155module_param(arp_interval, int, 0);
156MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
157module_param_array(arp_ip_target, charp, NULL, 0);
158MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
f5b2b966
JV		 159module_param(arp_validate, charp, 0);
160MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
3915c1e8
JV		 161module_param(fail_over_mac, charp, 0);
162MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
ebd8e497
AG		 163module_param(all_slaves_active, int, 0);
164MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
165 "by setting active flag for all slaves. "
166 "0 for never (default), 1 for always.");
c2952c31
FL		 167module_param(resend_igmp, int, 0);
168MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on link failure");
1da177e4
LT		 169
170/*----------------------------- Global variables ----------------------------*/
171
f71e1309 172static const char * const version =
1da177e4
LT		 173 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
174
f99189b1 175int bond_net_id __read_mostly;
1da177e4 176
3d632c3f
SH		 177static __be32 arp_target[BOND_MAX_ARP_TARGETS];
178static int arp_ip_count;
1da177e4 179static int bond_mode = BOND_MODE_ROUNDROBIN;
3d632c3f
SH		 180static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
181static int lacp_fast;
90e1795b 182#ifdef CONFIG_NET_POLL_CONTROLLER
c22d7ac8 183static int disable_netpoll = 1;
90e1795b 184#endif
1da177e4 185
e97fd7c6 186const struct bond_parm_tbl bond_lacp_tbl[] = {
1da177e4
LT		 187{ "slow", AD_LACP_SLOW},
188{ "fast", AD_LACP_FAST},
189{ NULL, -1},
190};
191
e97fd7c6 192const struct bond_parm_tbl bond_mode_tbl[] = {
1da177e4
LT		 193{ "balance-rr", BOND_MODE_ROUNDROBIN},
194{ "active-backup", BOND_MODE_ACTIVEBACKUP},
195{ "balance-xor", BOND_MODE_XOR},
196{ "broadcast", BOND_MODE_BROADCAST},
197{ "802.3ad", BOND_MODE_8023AD},
198{ "balance-tlb", BOND_MODE_TLB},
199{ "balance-alb", BOND_MODE_ALB},
200{ NULL, -1},
201};
202
e97fd7c6 203const struct bond_parm_tbl xmit_hashtype_tbl[] = {
169a3e66
JV		 204{ "layer2", BOND_XMIT_POLICY_LAYER2},
205{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
6f6652be 206{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
169a3e66
JV		 207{ NULL, -1},
208};
209
e97fd7c6 210const struct bond_parm_tbl arp_validate_tbl[] = {
f5b2b966
JV		 211{ "none", BOND_ARP_VALIDATE_NONE},
212{ "active", BOND_ARP_VALIDATE_ACTIVE},
213{ "backup", BOND_ARP_VALIDATE_BACKUP},
214{ "all", BOND_ARP_VALIDATE_ALL},
215{ NULL, -1},
216};
217
e97fd7c6 218const struct bond_parm_tbl fail_over_mac_tbl[] = {
3915c1e8
JV		 219{ "none", BOND_FOM_NONE},
220{ "active", BOND_FOM_ACTIVE},
221{ "follow", BOND_FOM_FOLLOW},
222{ NULL, -1},
223};
224
a549952a
JP		 225const struct bond_parm_tbl pri_reselect_tbl[] = {
226{ "always", BOND_PRI_RESELECT_ALWAYS},
227{ "better", BOND_PRI_RESELECT_BETTER},
228{ "failure", BOND_PRI_RESELECT_FAILURE},
229{ NULL, -1},
230};
231
fd989c83
JV		 232struct bond_parm_tbl ad_select_tbl[] = {
233{ "stable", BOND_AD_STABLE},
234{ "bandwidth", BOND_AD_BANDWIDTH},
235{ "count", BOND_AD_COUNT},
236{ NULL, -1},
237};
238
1da177e4
LT		 239/*-------------------------- Forward declarations ---------------------------*/
240
c3ade5ca 241static void bond_send_gratuitous_arp(struct bonding *bond);
181470fc 242static int bond_init(struct net_device *bond_dev);
c67dfb29 243static void bond_uninit(struct net_device *bond_dev);
1da177e4
LT		 244
245/*---------------------------- General routines -----------------------------*/
246
4ad072c9 247static const char *bond_mode_name(int mode)
1da177e4 248{
77afc92b
HE		 249 static const char *names[] = {
250 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
251 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
252 [BOND_MODE_XOR] = "load balancing (xor)",
253 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
3d632c3f 254 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
77afc92b
HE		 255 [BOND_MODE_TLB] = "transmit load balancing",
256 [BOND_MODE_ALB] = "adaptive load balancing",
257 };
258
259 if (mode < 0 || mode > BOND_MODE_ALB)
1da177e4 260 return "unknown";
77afc92b
HE		 261
262 return names[mode];
1da177e4
LT		 263}
264
265/*---------------------------------- VLAN -----------------------------------*/
266
267/**
268 * bond_add_vlan - add a new vlan id on bond
269 * @bond: bond that got the notification
270 * @vlan_id: the vlan id to add
271 *
272 * Returns -ENOMEM if allocation failed.
273 */
274static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
275{
276 struct vlan_entry *vlan;
277
5a03cdb7 278 pr_debug("bond: %s, vlan id %d\n",
a4aee5c8 279 (bond ? bond->dev->name : "None"), vlan_id);
1da177e4 280
305d552a 281 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
3d632c3f 282 if (!vlan)
1da177e4 283 return -ENOMEM;
1da177e4
LT		 284
285 INIT_LIST_HEAD(&vlan->vlan_list);
286 vlan->vlan_id = vlan_id;
287
288 write_lock_bh(&bond->lock);
289
290 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
291
292 write_unlock_bh(&bond->lock);
293
5a03cdb7 294 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
1da177e4
LT		 295
296 return 0;
297}
298
299/**
300 * bond_del_vlan - delete a vlan id from bond
301 * @bond: bond that got the notification
302 * @vlan_id: the vlan id to delete
303 *
304 * returns -ENODEV if @vlan_id was not found in @bond.
305 */
306static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
307{
0883beca 308 struct vlan_entry *vlan;
1da177e4
LT		 309 int res = -ENODEV;
310
5a03cdb7 311 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
1da177e4
LT		 312
313 write_lock_bh(&bond->lock);
314
0883beca 315 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
1da177e4
LT		 316 if (vlan->vlan_id == vlan_id) {
317 list_del(&vlan->vlan_list);
318
58402054 319 if (bond_is_lb(bond))
1da177e4 320 bond_alb_clear_vlan(bond, vlan_id);
1da177e4 321
a4aee5c8
JP		 322 pr_debug("removed VLAN ID %d from bond %s\n",
323 vlan_id, bond->dev->name);
1da177e4
LT		 324
325 kfree(vlan);
326
327 if (list_empty(&bond->vlan_list) &&
328 (bond->slave_cnt == 0)) {
329 /* Last VLAN removed and no slaves, so
330 * restore block on adding VLANs. This will
331 * be removed once new slaves that are not
332 * VLAN challenged will be added.
333 */
334 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
335 }
336
337 res = 0;
338 goto out;
339 }
340 }
341
a4aee5c8
JP		 342 pr_debug("couldn't find VLAN ID %d in bond %s\n",
343 vlan_id, bond->dev->name);
1da177e4
LT		 344
345out:
346 write_unlock_bh(&bond->lock);
347 return res;
348}
349
350/**
351 * bond_has_challenged_slaves
352 * @bond: the bond we're working on
353 *
354 * Searches the slave list. Returns 1 if a vlan challenged slave
355 * was found, 0 otherwise.
356 *
357 * Assumes bond->lock is held.
358 */
359static int bond_has_challenged_slaves(struct bonding *bond)
360{
361 struct slave *slave;
362 int i;
363
364 bond_for_each_slave(bond, slave, i) {
365 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 366 pr_debug("found VLAN challenged slave - %s\n",
a4aee5c8 367 slave->dev->name);
1da177e4
LT		 368 return 1;
369 }
370 }
371
5a03cdb7 372 pr_debug("no VLAN challenged slaves found\n");
1da177e4
LT		 373 return 0;
374}
375
376/**
377 * bond_next_vlan - safely skip to the next item in the vlans list.
378 * @bond: the bond we're working on
379 * @curr: item we're advancing from
380 *
381 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
382 * or @curr->next otherwise (even if it is @curr itself again).
3d632c3f 383 *
1da177e4
LT		 384 * Caller must hold bond->lock
385 */
386struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
387{
388 struct vlan_entry *next, *last;
389
3d632c3f 390 if (list_empty(&bond->vlan_list))
1da177e4 391 return NULL;
1da177e4
LT		 392
393 if (!curr) {
394 next = list_entry(bond->vlan_list.next,
395 struct vlan_entry, vlan_list);
396 } else {
397 last = list_entry(bond->vlan_list.prev,
398 struct vlan_entry, vlan_list);
399 if (last == curr) {
400 next = list_entry(bond->vlan_list.next,
401 struct vlan_entry, vlan_list);
402 } else {
403 next = list_entry(curr->vlan_list.next,
404 struct vlan_entry, vlan_list);
405 }
406 }
407
408 return next;
409}
410
411/**
412 * bond_dev_queue_xmit - Prepare skb for xmit.
3d632c3f 413 *
1da177e4
LT		 414 * @bond: bond device that got this skb for tx.
415 * @skb: hw accel VLAN tagged skb to transmit
416 * @slave_dev: slave that is supposed to xmit this skbuff
3d632c3f 417 *
1da177e4
LT		 418 * When the bond gets an skb to transmit that is
419 * already hardware accelerated VLAN tagged, and it
420 * needs to relay this skb to a slave that is not
421 * hw accel capable, the skb needs to be "unaccelerated",
422 * i.e. strip the hwaccel tag and re-insert it as part
423 * of the payload.
424 */
3d632c3f
SH		 425int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
426 struct net_device *slave_dev)
1da177e4 427{
966bc6f4 428 unsigned short uninitialized_var(vlan_id);
1da177e4 429
f35188fa 430 /* Test vlan_list not vlgrp to catch and handle 802.1p tags */
1da177e4
LT		 431 if (!list_empty(&bond->vlan_list) &&
432 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
433 vlan_get_tag(skb, &vlan_id) == 0) {
434 skb->dev = slave_dev;
435 skb = vlan_put_tag(skb, vlan_id);
436 if (!skb) {
437 /* vlan_put_tag() frees the skb in case of error,
438 * so return success here so the calling functions
439 * won't attempt to free is again.
440 */
441 return 0;
442 }
443 } else {
444 skb->dev = slave_dev;
445 }
446
447 skb->priority = 1;
f6dc31a8
WC		 448#ifdef CONFIG_NET_POLL_CONTROLLER
449 if (unlikely(bond->dev->priv_flags & IFF_IN_NETPOLL)) {
450 struct netpoll *np = bond->dev->npinfo->netpoll;
451 slave_dev->npinfo = bond->dev->npinfo;
452 np->real_dev = np->dev = skb->dev;
453 slave_dev->priv_flags |= IFF_IN_NETPOLL;
454 netpoll_send_skb(np, skb);
455 slave_dev->priv_flags &= ~IFF_IN_NETPOLL;
456 np->dev = bond->dev;
457 } else
458#endif
459 dev_queue_xmit(skb);
1da177e4
LT		 460
461 return 0;
462}
463
464/*
465 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
466 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
467 * lock because:
468 * a. This operation is performed in IOCTL context,
469 * b. The operation is protected by the RTNL semaphore in the 8021q code,
470 * c. Holding a lock with BH disabled while directly calling a base driver
471 * entry point is generally a BAD idea.
3d632c3f 472 *
1da177e4
LT		 473 * The design of synchronization/protection for this operation in the 8021q
474 * module is good for one or more VLAN devices over a single physical device
475 * and cannot be extended for a teaming solution like bonding, so there is a
476 * potential race condition here where a net device from the vlan group might
477 * be referenced (either by a base driver or the 8021q code) while it is being
478 * removed from the system. However, it turns out we're not making matters
479 * worse, and if it works for regular VLAN usage it will work here too.
480*/
481
482/**
483 * bond_vlan_rx_register - Propagates registration to slaves
484 * @bond_dev: bonding net device that got called
485 * @grp: vlan group being registered
486 */
3d632c3f
SH		 487static void bond_vlan_rx_register(struct net_device *bond_dev,
488 struct vlan_group *grp)
1da177e4 489{
454d7c9b 490 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 491 struct slave *slave;
492 int i;
493
f35188fa 494 write_lock(&bond->lock);
1da177e4 495 bond->vlgrp = grp;
f35188fa 496 write_unlock(&bond->lock);
1da177e4
LT		 497
498 bond_for_each_slave(bond, slave, i) {
499 struct net_device *slave_dev = slave->dev;
eb7cc59a 500 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 501
502 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH		 503 slave_ops->ndo_vlan_rx_register) {
504 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
1da177e4
LT		 505 }
506 }
507}
508
509/**
510 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
511 * @bond_dev: bonding net device that got called
512 * @vid: vlan id being added
513 */
514static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
515{
454d7c9b 516 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 517 struct slave *slave;
518 int i, res;
519
520 bond_for_each_slave(bond, slave, i) {
521 struct net_device *slave_dev = slave->dev;
eb7cc59a 522 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 523
524 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a
SH		 525 slave_ops->ndo_vlan_rx_add_vid) {
526 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
1da177e4
LT		 527 }
528 }
529
530 res = bond_add_vlan(bond, vid);
531 if (res) {
a4aee5c8 532 pr_err("%s: Error: Failed to add vlan id %d\n",
1da177e4
LT		 533 bond_dev->name, vid);
534 }
535}
536
537/**
538 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
539 * @bond_dev: bonding net device that got called
540 * @vid: vlan id being removed
541 */
542static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
543{
454d7c9b 544 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 545 struct slave *slave;
546 struct net_device *vlan_dev;
547 int i, res;
548
549 bond_for_each_slave(bond, slave, i) {
550 struct net_device *slave_dev = slave->dev;
eb7cc59a 551 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 552
553 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
eb7cc59a 554 slave_ops->ndo_vlan_rx_kill_vid) {
1da177e4
LT		 555 /* Save and then restore vlan_dev in the grp array,
556 * since the slave's driver might clear it.
557 */
5c15bdec 558 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
eb7cc59a 559 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
5c15bdec 560 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
1da177e4
LT		 561 }
562 }
563
564 res = bond_del_vlan(bond, vid);
565 if (res) {
a4aee5c8 566 pr_err("%s: Error: Failed to remove vlan id %d\n",
1da177e4
LT		 567 bond_dev->name, vid);
568 }
569}
570
571static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
572{
573 struct vlan_entry *vlan;
eb7cc59a 574 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4 575
f35188fa 576 if (!bond->vlgrp)
03dc2f4c 577 return;
1da177e4
LT		 578
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, bond->vlgrp);
1da177e4
LT		 582
583 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 584 !(slave_ops->ndo_vlan_rx_add_vid))
03dc2f4c 585 return;
1da177e4 586
eb7cc59a
SH		 587 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
588 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
1da177e4
LT		 589}
590
3d632c3f
SH		 591static void bond_del_vlans_from_slave(struct bonding *bond,
592 struct net_device *slave_dev)
1da177e4 593{
eb7cc59a 594 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4
LT		 595 struct vlan_entry *vlan;
596 struct net_device *vlan_dev;
597
f35188fa 598 if (!bond->vlgrp)
03dc2f4c 599 return;
1da177e4
LT		 600
601 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
eb7cc59a 602 !(slave_ops->ndo_vlan_rx_kill_vid))
1da177e4 603 goto unreg;
1da177e4
LT		 604
605 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f35188fa
JV		 606 if (!vlan->vlan_id)
607 continue;
1da177e4
LT		 608 /* Save and then restore vlan_dev in the grp array,
609 * since the slave's driver might clear it.
610 */
5c15bdec 611 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
eb7cc59a 612 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
5c15bdec 613 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
1da177e4
LT		 614 }
615
616unreg:
617 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
eb7cc59a
SH		 618 slave_ops->ndo_vlan_rx_register)
619 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
1da177e4
LT		 620}
621
622/*------------------------------- Link status -------------------------------*/
623
ff59c456
JV		 624/*
625 * Set the carrier state for the master according to the state of its
626 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
627 * do special 802.3ad magic.
628 *
629 * Returns zero if carrier state does not change, nonzero if it does.
630 */
631static int bond_set_carrier(struct bonding *bond)
632{
633 struct slave *slave;
634 int i;
635
636 if (bond->slave_cnt == 0)
637 goto down;
638
639 if (bond->params.mode == BOND_MODE_8023AD)
640 return bond_3ad_set_carrier(bond);
641
642 bond_for_each_slave(bond, slave, i) {
643 if (slave->link == BOND_LINK_UP) {
644 if (!netif_carrier_ok(bond->dev)) {
645 netif_carrier_on(bond->dev);
646 return 1;
647 }
648 return 0;
649 }
650 }
651
652down:
653 if (netif_carrier_ok(bond->dev)) {
654 netif_carrier_off(bond->dev);
655 return 1;
656 }
657 return 0;
658}
659
1da177e4
LT		 660/*
661 * Get link speed and duplex from the slave's base driver
662 * using ethtool. If for some reason the call fails or the
663 * values are invalid, fake speed and duplex to 100/Full
664 * and return error.
665 */
666static int bond_update_speed_duplex(struct slave *slave)
667{
668 struct net_device *slave_dev = slave->dev;
1da177e4 669 struct ethtool_cmd etool;
61a44b9c 670 int res;
1da177e4
LT		 671
672 /* Fake speed and duplex */
673 slave->speed = SPEED_100;
674 slave->duplex = DUPLEX_FULL;
675
61a44b9c
MW		 676 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
677 return -1;
1da177e4 678
61a44b9c
MW		 679 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
680 if (res < 0)
1da177e4 681 return -1;
1da177e4 682
1da177e4
LT		 683 switch (etool.speed) {
684 case SPEED_10:
685 case SPEED_100:
686 case SPEED_1000:
94dbffd5 687 case SPEED_10000:
1da177e4
LT		 688 break;
689 default:
690 return -1;
691 }
692
693 switch (etool.duplex) {
694 case DUPLEX_FULL:
695 case DUPLEX_HALF:
696 break;
697 default:
698 return -1;
699 }
700
701 slave->speed = etool.speed;
702 slave->duplex = etool.duplex;
703
704 return 0;
705}
706
707/*
708 * if <dev> supports MII link status reporting, check its link status.
709 *
710 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
3d632c3f 711 * depending upon the setting of the use_carrier parameter.
1da177e4
LT		 712 *
713 * Return either BMSR_LSTATUS, meaning that the link is up (or we
714 * can't tell and just pretend it is), or 0, meaning that the link is
715 * down.
716 *
717 * If reporting is non-zero, instead of faking link up, return -1 if
718 * both ETHTOOL and MII ioctls fail (meaning the device does not
719 * support them). If use_carrier is set, return whatever it says.
720 * It'd be nice if there was a good way to tell if a driver supports
721 * netif_carrier, but there really isn't.
722 */
3d632c3f
SH		 723static int bond_check_dev_link(struct bonding *bond,
724 struct net_device *slave_dev, int reporting)
1da177e4 725{
eb7cc59a 726 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
d9d52832 727 int (*ioctl)(struct net_device *, struct ifreq *, int);
1da177e4
LT		 728 struct ifreq ifr;
729 struct mii_ioctl_data *mii;
1da177e4 730
6c988853
PG		 731 if (!reporting && !netif_running(slave_dev))
732 return 0;
733
eb7cc59a 734 if (bond->params.use_carrier)
1da177e4 735 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
1da177e4 736
29112f4e
JP		 737 /* Try to get link status using Ethtool first. */
738 if (slave_dev->ethtool_ops) {
739 if (slave_dev->ethtool_ops->get_link) {
740 u32 link;
741
742 link = slave_dev->ethtool_ops->get_link(slave_dev);
743
744 return link ? BMSR_LSTATUS : 0;
745 }
746 }
747
3d632c3f 748 /* Ethtool can't be used, fallback to MII ioctls. */
eb7cc59a 749 ioctl = slave_ops->ndo_do_ioctl;
1da177e4
LT		 750 if (ioctl) {
751 /* TODO: set pointer to correct ioctl on a per team member */
752 /* bases to make this more efficient. that is, once */
753 /* we determine the correct ioctl, we will always */
754 /* call it and not the others for that team */
755 /* member. */
756
757 /*
758 * We cannot assume that SIOCGMIIPHY will also read a
759 * register; not all network drivers (e.g., e100)
760 * support that.
761 */
762
763 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
764 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
765 mii = if_mii(&ifr);
766 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
767 mii->reg_num = MII_BMSR;
3d632c3f
SH		 768 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
769 return mii->val_out & BMSR_LSTATUS;
1da177e4
LT		 770 }
771 }
772
1da177e4
LT		 773 /*
774 * If reporting, report that either there's no dev->do_ioctl,
61a44b9c 775 * or both SIOCGMIIREG and get_link failed (meaning that we
1da177e4
LT		 776 * cannot report link status). If not reporting, pretend
777 * we're ok.
778 */
3d632c3f 779 return reporting ? -1 : BMSR_LSTATUS;
1da177e4
LT		 780}
781
782/*----------------------------- Multicast list ------------------------------*/
783
1da177e4
LT		 784/*
785 * Push the promiscuity flag down to appropriate slaves
786 */
7e1a1ac1 787static int bond_set_promiscuity(struct bonding *bond, int inc)
1da177e4 788{
7e1a1ac1 789 int err = 0;
1da177e4
LT		 790 if (USES_PRIMARY(bond->params.mode)) {
791 /* write lock already acquired */
792 if (bond->curr_active_slave) {
7e1a1ac1
WC		 793 err = dev_set_promiscuity(bond->curr_active_slave->dev,
794 inc);
1da177e4
LT		 795 }
796 } else {
797 struct slave *slave;
798 int i;
799 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 800 err = dev_set_promiscuity(slave->dev, inc);
801 if (err)
802 return err;
1da177e4
LT		 803 }
804 }
7e1a1ac1 805 return err;
1da177e4
LT		 806}
807
808/*
809 * Push the allmulti flag down to all slaves
810 */
7e1a1ac1 811static int bond_set_allmulti(struct bonding *bond, int inc)
1da177e4 812{
7e1a1ac1 813 int err = 0;
1da177e4
LT		 814 if (USES_PRIMARY(bond->params.mode)) {
815 /* write lock already acquired */
816 if (bond->curr_active_slave) {
7e1a1ac1
WC		 817 err = dev_set_allmulti(bond->curr_active_slave->dev,
818 inc);
1da177e4
LT		 819 }
820 } else {
821 struct slave *slave;
822 int i;
823 bond_for_each_slave(bond, slave, i) {
7e1a1ac1
WC		 824 err = dev_set_allmulti(slave->dev, inc);
825 if (err)
826 return err;
1da177e4
LT		 827 }
828 }
7e1a1ac1 829 return err;
1da177e4
LT		 830}
831
832/*
833 * Add a Multicast address to slaves
834 * according to mode
835 */
22bedad3 836static void bond_mc_add(struct bonding *bond, void *addr)
1da177e4
LT		 837{
838 if (USES_PRIMARY(bond->params.mode)) {
839 /* write lock already acquired */
3d632c3f 840 if (bond->curr_active_slave)
22bedad3 841 dev_mc_add(bond->curr_active_slave->dev, addr);
1da177e4
LT		 842 } else {
843 struct slave *slave;
844 int i;
3d632c3f
SH		 845
846 bond_for_each_slave(bond, slave, i)
22bedad3 847 dev_mc_add(slave->dev, addr);
1da177e4
LT		 848 }
849}
850
851/*
852 * Remove a multicast address from slave
853 * according to mode
854 */
22bedad3 855static void bond_mc_del(struct bonding *bond, void *addr)
1da177e4
LT		 856{
857 if (USES_PRIMARY(bond->params.mode)) {
858 /* write lock already acquired */
3d632c3f 859 if (bond->curr_active_slave)
22bedad3 860 dev_mc_del(bond->curr_active_slave->dev, addr);
1da177e4
LT		 861 } else {
862 struct slave *slave;
863 int i;
864 bond_for_each_slave(bond, slave, i) {
22bedad3 865 dev_mc_del(slave->dev, addr);
1da177e4
LT		 866 }
867 }
868}
869
a816c7c7 870
5a37e8ca 871static void __bond_resend_igmp_join_requests(struct net_device *dev)
a816c7c7
JV		 872{
873 struct in_device *in_dev;
874 struct ip_mc_list *im;
875
876 rcu_read_lock();
5a37e8ca 877 in_dev = __in_dev_get_rcu(dev);
a816c7c7 878 if (in_dev) {
3d632c3f 879 for (im = in_dev->mc_list; im; im = im->next)
a816c7c7 880 ip_mc_rejoin_group(im);
a816c7c7
JV		 881 }
882
883 rcu_read_unlock();
884}
885
5a37e8ca
FL		 886/*
887 * Retrieve the list of registered multicast addresses for the bonding
888 * device and retransmit an IGMP JOIN request to the current active
889 * slave.
890 */
891static void bond_resend_igmp_join_requests(struct bonding *bond)
892{
893 struct net_device *vlan_dev;
894 struct vlan_entry *vlan;
895
896 read_lock(&bond->lock);
897
898 /* rejoin all groups on bond device */
899 __bond_resend_igmp_join_requests(bond->dev);
900
901 /* rejoin all groups on vlan devices */
902 if (bond->vlgrp) {
903 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
904 vlan_dev = vlan_group_get_device(bond->vlgrp,
905 vlan->vlan_id);
906 if (vlan_dev)
907 __bond_resend_igmp_join_requests(vlan_dev);
908 }
909 }
910
c2952c31
FL		 911 if (--bond->igmp_retrans > 0)
912 queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5);
913
5a37e8ca
FL		 914 read_unlock(&bond->lock);
915}
916
917void bond_resend_igmp_join_requests_delayed(struct work_struct *work)
918{
919 struct bonding *bond = container_of(work, struct bonding,
920 mcast_work.work);
921 bond_resend_igmp_join_requests(bond);
922}
923
1da177e4
LT		 924/*
925 * flush all members of flush->mc_list from device dev->mc_list
926 */
3d632c3f
SH		 927static void bond_mc_list_flush(struct net_device *bond_dev,
928 struct net_device *slave_dev)
1da177e4 929{
454d7c9b 930 struct bonding *bond = netdev_priv(bond_dev);
22bedad3 931 struct netdev_hw_addr *ha;
1da177e4 932
22bedad3
JP		 933 netdev_for_each_mc_addr(ha, bond_dev)
934 dev_mc_del(slave_dev, ha->addr);
1da177e4
LT		 935
936 if (bond->params.mode == BOND_MODE_8023AD) {
937 /* del lacpdu mc addr from mc list */
938 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
939
22bedad3 940 dev_mc_del(slave_dev, lacpdu_multicast);
1da177e4
LT		 941 }
942}
943
944/*--------------------------- Active slave change ---------------------------*/
945
946/*
947 * Update the mc list and multicast-related flags for the new and
948 * old active slaves (if any) according to the multicast mode, and
949 * promiscuous flags unconditionally.
950 */
3d632c3f
SH		 951static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
952 struct slave *old_active)
1da177e4 953{
22bedad3 954 struct netdev_hw_addr *ha;
1da177e4 955
3d632c3f 956 if (!USES_PRIMARY(bond->params.mode))
1da177e4
LT		 957 /* nothing to do - mc list is already up-to-date on
958 * all slaves
959 */
960 return;
1da177e4
LT		 961
962 if (old_active) {
3d632c3f 963 if (bond->dev->flags & IFF_PROMISC)
1da177e4 964 dev_set_promiscuity(old_active->dev, -1);
1da177e4 965
3d632c3f 966 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 967 dev_set_allmulti(old_active->dev, -1);
1da177e4 968
22bedad3
JP		 969 netdev_for_each_mc_addr(ha, bond->dev)
970 dev_mc_del(old_active->dev, ha->addr);
1da177e4
LT		 971 }
972
973 if (new_active) {
7e1a1ac1 974 /* FIXME: Signal errors upstream. */
3d632c3f 975 if (bond->dev->flags & IFF_PROMISC)
1da177e4 976 dev_set_promiscuity(new_active->dev, 1);
1da177e4 977
3d632c3f 978 if (bond->dev->flags & IFF_ALLMULTI)
1da177e4 979 dev_set_allmulti(new_active->dev, 1);
1da177e4 980
22bedad3
JP		 981 netdev_for_each_mc_addr(ha, bond->dev)
982 dev_mc_add(new_active->dev, ha->addr);
1da177e4
LT		 983 }
984}
985
3915c1e8
JV		 986/*
987 * bond_do_fail_over_mac
988 *
989 * Perform special MAC address swapping for fail_over_mac settings
990 *
991 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
992 */
993static void bond_do_fail_over_mac(struct bonding *bond,
994 struct slave *new_active,
995 struct slave *old_active)
1f78d9f9
HE		 996 __releases(&bond->curr_slave_lock)
997 __releases(&bond->lock)
998 __acquires(&bond->lock)
999 __acquires(&bond->curr_slave_lock)
3915c1e8
JV		 1000{
1001 u8 tmp_mac[ETH_ALEN];
1002 struct sockaddr saddr;
1003 int rv;
1004
1005 switch (bond->params.fail_over_mac) {
1006 case BOND_FOM_ACTIVE:
1007 if (new_active)
1008 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
1009 new_active->dev->addr_len);
1010 break;
1011 case BOND_FOM_FOLLOW:
1012 /*
1013 * if new_active && old_active, swap them
1014 * if just old_active, do nothing (going to no active slave)
1015 * if just new_active, set new_active to bond's MAC
1016 */
1017 if (!new_active)
1018 return;
1019
1020 write_unlock_bh(&bond->curr_slave_lock);
1021 read_unlock(&bond->lock);
1022
1023 if (old_active) {
1024 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
1025 memcpy(saddr.sa_data, old_active->dev->dev_addr,
1026 ETH_ALEN);
1027 saddr.sa_family = new_active->dev->type;
1028 } else {
1029 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
1030 saddr.sa_family = bond->dev->type;
1031 }
1032
1033 rv = dev_set_mac_address(new_active->dev, &saddr);
1034 if (rv) {
a4aee5c8 1035 pr_err("%s: Error %d setting MAC of slave %s\n",
3915c1e8
JV		 1036 bond->dev->name, -rv, new_active->dev->name);
1037 goto out;
1038 }
1039
1040 if (!old_active)
1041 goto out;
1042
1043 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1044 saddr.sa_family = old_active->dev->type;
1045
1046 rv = dev_set_mac_address(old_active->dev, &saddr);
1047 if (rv)
a4aee5c8 1048 pr_err("%s: Error %d setting MAC of slave %s\n",
3915c1e8
JV		 1049 bond->dev->name, -rv, new_active->dev->name);
1050out:
1051 read_lock(&bond->lock);
1052 write_lock_bh(&bond->curr_slave_lock);
1053 break;
1054 default:
a4aee5c8 1055 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
3915c1e8
JV		 1056 bond->dev->name, bond->params.fail_over_mac);
1057 break;
1058 }
1059
1060}
1061
a549952a
JP		 1062static bool bond_should_change_active(struct bonding *bond)
1063{
1064 struct slave *prim = bond->primary_slave;
1065 struct slave *curr = bond->curr_active_slave;
1066
1067 if (!prim || !curr || curr->link != BOND_LINK_UP)
1068 return true;
1069 if (bond->force_primary) {
1070 bond->force_primary = false;
1071 return true;
1072 }
1073 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
1074 (prim->speed < curr->speed ||
1075 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
1076 return false;
1077 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
1078 return false;
1079 return true;
1080}
3915c1e8 1081
1da177e4
LT		 1082/**
1083 * find_best_interface - select the best available slave to be the active one
1084 * @bond: our bonding struct
1085 *
1086 * Warning: Caller must hold curr_slave_lock for writing.
1087 */
1088static struct slave *bond_find_best_slave(struct bonding *bond)
1089{
1090 struct slave *new_active, *old_active;
1091 struct slave *bestslave = NULL;
1092 int mintime = bond->params.updelay;
1093 int i;
1094
49b4ad92 1095 new_active = bond->curr_active_slave;
1da177e4
LT		 1096
1097 if (!new_active) { /* there were no active slaves left */
3d632c3f 1098 if (bond->slave_cnt > 0) /* found one slave */
1da177e4 1099 new_active = bond->first_slave;
3d632c3f 1100 else
1da177e4 1101 return NULL; /* still no slave, return NULL */
1da177e4
LT		 1102 }
1103
1da177e4 1104 if ((bond->primary_slave) &&
a549952a
JP		 1105 bond->primary_slave->link == BOND_LINK_UP &&
1106 bond_should_change_active(bond)) {
1da177e4
LT		 1107 new_active = bond->primary_slave;
1108 }
1109
1110 /* remember where to stop iterating over the slaves */
1111 old_active = new_active;
1112
1113 bond_for_each_slave_from(bond, new_active, i, old_active) {
b9f60253
JP		 1114 if (new_active->link == BOND_LINK_UP) {
1115 return new_active;
1116 } else if (new_active->link == BOND_LINK_BACK &&
1117 IS_UP(new_active->dev)) {
1118 /* link up, but waiting for stabilization */
1119 if (new_active->delay < mintime) {
1120 mintime = new_active->delay;
1121 bestslave = new_active;
1da177e4
LT		 1122 }
1123 }
1124 }
1125
1126 return bestslave;
1127}
1128
1129/**
1130 * change_active_interface - change the active slave into the specified one
1131 * @bond: our bonding struct
1132 * @new: the new slave to make the active one
1133 *
1134 * Set the new slave to the bond's settings and unset them on the old
1135 * curr_active_slave.
1136 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1137 *
1138 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1139 * because it is apparently the best available slave we have, even though its
1140 * updelay hasn't timed out yet.
1141 *
3915c1e8
JV		 1142 * If new_active is not NULL, caller must hold bond->lock for read and
1143 * curr_slave_lock for write_bh.
1da177e4 1144 */
a77b5325 1145void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
1da177e4
LT		 1146{
1147 struct slave *old_active = bond->curr_active_slave;
1148
3d632c3f 1149 if (old_active == new_active)
1da177e4 1150 return;
1da177e4
LT		 1151
1152 if (new_active) {
b2220cad
JV		 1153 new_active->jiffies = jiffies;
1154
1da177e4
LT		 1155 if (new_active->link == BOND_LINK_BACK) {
1156 if (USES_PRIMARY(bond->params.mode)) {
a4aee5c8
JP		 1157 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1158 bond->dev->name, new_active->dev->name,
1159 (bond->params.updelay - new_active->delay) * bond->params.miimon);
1da177e4
LT		 1160 }
1161
1162 new_active->delay = 0;
1163 new_active->link = BOND_LINK_UP;
1da177e4 1164
3d632c3f 1165 if (bond->params.mode == BOND_MODE_8023AD)
1da177e4 1166 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
1da177e4 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)) {
a4aee5c8
JP		 1172 pr_info("%s: making interface %s the new active one.\n",
1173 bond->dev->name, new_active->dev->name);
1da177e4
LT		 1174 }
1175 }
1176 }
1177
3d632c3f 1178 if (USES_PRIMARY(bond->params.mode))
1da177e4 1179 bond_mc_swap(bond, new_active, old_active);
1da177e4 1180
58402054 1181 if (bond_is_lb(bond)) {
1da177e4 1182 bond_alb_handle_active_change(bond, new_active);
8f903c70
JV		 1183 if (old_active)
1184 bond_set_slave_inactive_flags(old_active);
1185 if (new_active)
1186 bond_set_slave_active_flags(new_active);
1da177e4
LT		 1187 } else {
1188 bond->curr_active_slave = new_active;
1189 }
c3ade5ca
JV		 1190
1191 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
3d632c3f 1192 if (old_active)
c3ade5ca 1193 bond_set_slave_inactive_flags(old_active);
c3ade5ca
JV		 1194
1195 if (new_active) {
1196 bond_set_slave_active_flags(new_active);
2ab82852 1197
709f8a45
OG		 1198 if (bond->params.fail_over_mac)
1199 bond_do_fail_over_mac(bond, new_active,
1200 old_active);
3915c1e8 1201
709f8a45 1202 bond->send_grat_arp = bond->params.num_grat_arp;
b59f9f74 1203 bond_send_gratuitous_arp(bond);
01f3109d 1204
305d552a
BH		 1205 bond->send_unsol_na = bond->params.num_unsol_na;
1206 bond_send_unsolicited_na(bond);
1207
01f3109d
OG		 1208 write_unlock_bh(&bond->curr_slave_lock);
1209 read_unlock(&bond->lock);
1210
75c78500 1211 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
01f3109d
OG		 1212
1213 read_lock(&bond->lock);
1214 write_lock_bh(&bond->curr_slave_lock);
7893b249 1215 }
c3ade5ca 1216 }
a2fd940f 1217
5a37e8ca
FL		 1218 /* resend IGMP joins since active slave has changed or
1219 * all were sent on curr_active_slave */
1220 if ((USES_PRIMARY(bond->params.mode) && new_active) ||
1221 bond->params.mode == BOND_MODE_ROUNDROBIN) {
c2952c31 1222 bond->igmp_retrans = bond->params.resend_igmp;
5a37e8ca 1223 queue_delayed_work(bond->wq, &bond->mcast_work, 0);
a2fd940f 1224 }
1da177e4
LT		 1225}
1226
1227/**
1228 * bond_select_active_slave - select a new active slave, if needed
1229 * @bond: our bonding struct
1230 *
3d632c3f 1231 * This functions should be called when one of the following occurs:
1da177e4
LT		 1232 * - The old curr_active_slave has been released or lost its link.
1233 * - The primary_slave has got its link back.
1234 * - A slave has got its link back and there's no old curr_active_slave.
1235 *
3915c1e8 1236 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
1da177e4 1237 */
a77b5325 1238void bond_select_active_slave(struct bonding *bond)
1da177e4
LT		 1239{
1240 struct slave *best_slave;
ff59c456 1241 int rv;
1da177e4
LT		 1242
1243 best_slave = bond_find_best_slave(bond);
1244 if (best_slave != bond->curr_active_slave) {
1245 bond_change_active_slave(bond, best_slave);
ff59c456
JV		 1246 rv = bond_set_carrier(bond);
1247 if (!rv)
1248 return;
1249
1250 if (netif_carrier_ok(bond->dev)) {
a4aee5c8
JP		 1251 pr_info("%s: first active interface up!\n",
1252 bond->dev->name);
ff59c456 1253 } else {
a4aee5c8
JP		 1254 pr_info("%s: now running without any active interface !\n",
1255 bond->dev->name);
ff59c456 1256 }
1da177e4
LT		 1257 }
1258}
1259
1260/*--------------------------- slave list handling ---------------------------*/
1261
1262/*
1263 * This function attaches the slave to the end of list.
1264 *
1265 * bond->lock held for writing by caller.
1266 */
1267static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1268{
1269 if (bond->first_slave == NULL) { /* attaching the first slave */
1270 new_slave->next = new_slave;
1271 new_slave->prev = new_slave;
1272 bond->first_slave = new_slave;
1273 } else {
1274 new_slave->next = bond->first_slave;
1275 new_slave->prev = bond->first_slave->prev;
1276 new_slave->next->prev = new_slave;
1277 new_slave->prev->next = new_slave;
1278 }
1279
1280 bond->slave_cnt++;
1281}
1282
1283/*
1284 * This function detaches the slave from the list.
1285 * WARNING: no check is made to verify if the slave effectively
1286 * belongs to <bond>.
1287 * Nothing is freed on return, structures are just unchained.
1288 * If any slave pointer in bond was pointing to <slave>,
1289 * it should be changed by the calling function.
1290 *
1291 * bond->lock held for writing by caller.
1292 */
1293static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1294{
3d632c3f 1295 if (slave->next)
1da177e4 1296 slave->next->prev = slave->prev;
1da177e4 1297
3d632c3f 1298 if (slave->prev)
1da177e4 1299 slave->prev->next = slave->next;
1da177e4
LT		 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
f6dc31a8
WC		 1314#ifdef CONFIG_NET_POLL_CONTROLLER
1315/*
1316 * You must hold read lock on bond->lock before calling this.
1317 */
1318static bool slaves_support_netpoll(struct net_device *bond_dev)
1319{
1320 struct bonding *bond = netdev_priv(bond_dev);
1321 struct slave *slave;
1322 int i = 0;
1323 bool ret = true;
1324
1325 bond_for_each_slave(bond, slave, i) {
1326 if ((slave->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
1327 !slave->dev->netdev_ops->ndo_poll_controller)
1328 ret = false;
1329 }
1330 return i != 0 && ret;
1331}
1332
1333static void bond_poll_controller(struct net_device *bond_dev)
1334{
1335 struct net_device *dev = bond_dev->npinfo->netpoll->real_dev;
1336 if (dev != bond_dev)
1337 netpoll_poll_dev(dev);
1338}
1339
1340static void bond_netpoll_cleanup(struct net_device *bond_dev)
1341{
1342 struct bonding *bond = netdev_priv(bond_dev);
1343 struct slave *slave;
1344 const struct net_device_ops *ops;
1345 int i;
1346
1347 read_lock(&bond->lock);
1348 bond_dev->npinfo = NULL;
1349 bond_for_each_slave(bond, slave, i) {
1350 if (slave->dev) {
1351 ops = slave->dev->netdev_ops;
1352 if (ops->ndo_netpoll_cleanup)
1353 ops->ndo_netpoll_cleanup(slave->dev);
1354 else
1355 slave->dev->npinfo = NULL;
1356 }
1357 }
1358 read_unlock(&bond->lock);
1359}
1360
1361#else
1362
1363static void bond_netpoll_cleanup(struct net_device *bond_dev)
1364{
1365}
1366
1367#endif
1368
1da177e4
LT		 1369/*---------------------------------- IOCTL ----------------------------------*/
1370
4ad072c9
AB		 1371static int bond_sethwaddr(struct net_device *bond_dev,
1372 struct net_device *slave_dev)
1da177e4 1373{
5a03cdb7
HE		 1374 pr_debug("bond_dev=%p\n", bond_dev);
1375 pr_debug("slave_dev=%p\n", slave_dev);
1376 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
1da177e4
LT		 1377 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1378 return 0;
1379}
1380
7f353bf2
HX		 1381#define BOND_VLAN_FEATURES \
1382 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1383 NETIF_F_HW_VLAN_FILTER)
8531c5ff 1384
3d632c3f 1385/*
8e3babcd 1386 * Compute the common dev->feature set available to all slaves. Some
7f353bf2
HX		 1387 * feature bits are managed elsewhere, so preserve those feature bits
1388 * on the master device.
8531c5ff
AK		 1389 */
1390static int bond_compute_features(struct bonding *bond)
1391{
8531c5ff
AK		 1392 struct slave *slave;
1393 struct net_device *bond_dev = bond->dev;
7f353bf2 1394 unsigned long features = bond_dev->features;
278339a4 1395 unsigned long vlan_features = 0;
3158bf7d
MS		 1396 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1397 bond_dev->hard_header_len);
8e3babcd 1398 int i;
8531c5ff 1399
7f353bf2 1400 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
b63365a2
HX		 1401 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1402
1403 if (!bond->first_slave)
1404 goto done;
1405
1406 features &= ~NETIF_F_ONE_FOR_ALL;
7f353bf2 1407
278339a4 1408 vlan_features = bond->first_slave->dev->vlan_features;
54ef3137 1409 bond_for_each_slave(bond, slave, i) {
b63365a2
HX		 1410 features = netdev_increment_features(features,
1411 slave->dev->features,
1412 NETIF_F_ONE_FOR_ALL);
278339a4
JV		 1413 vlan_features = netdev_increment_features(vlan_features,
1414 slave->dev->vlan_features,
1415 NETIF_F_ONE_FOR_ALL);
54ef3137
JV		 1416 if (slave->dev->hard_header_len > max_hard_header_len)
1417 max_hard_header_len = slave->dev->hard_header_len;
1418 }
8531c5ff 1419
b63365a2 1420done:
7f353bf2 1421 features |= (bond_dev->features & BOND_VLAN_FEATURES);
b63365a2 1422 bond_dev->features = netdev_fix_features(features, NULL);
278339a4 1423 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
54ef3137 1424 bond_dev->hard_header_len = max_hard_header_len;
8531c5ff
AK		 1425
1426 return 0;
1427}
1428
872254dd
MS		 1429static void bond_setup_by_slave(struct net_device *bond_dev,
1430 struct net_device *slave_dev)
1431{
454d7c9b 1432 struct bonding *bond = netdev_priv(bond_dev);
d90a162a 1433
00829823 1434 bond_dev->header_ops = slave_dev->header_ops;
872254dd
MS		 1435
1436 bond_dev->type = slave_dev->type;
1437 bond_dev->hard_header_len = slave_dev->hard_header_len;
1438 bond_dev->addr_len = slave_dev->addr_len;
1439
1440 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1441 slave_dev->addr_len);
d90a162a 1442 bond->setup_by_slave = 1;
872254dd
MS		 1443}
1444
1da177e4 1445/* enslave device <slave> to bond device <master> */
a77b5325 1446int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1447{
454d7c9b 1448 struct bonding *bond = netdev_priv(bond_dev);
eb7cc59a 1449 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
1da177e4 1450 struct slave *new_slave = NULL;
22bedad3 1451 struct netdev_hw_addr *ha;
1da177e4
LT		 1452 struct sockaddr addr;
1453 int link_reporting;
1454 int old_features = bond_dev->features;
1455 int res = 0;
1456
552709d5 1457 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
eb7cc59a 1458 slave_ops->ndo_do_ioctl == NULL) {
a4aee5c8
JP		 1459 pr_warning("%s: Warning: no link monitoring support for %s\n",
1460 bond_dev->name, slave_dev->name);
1da177e4
LT		 1461 }
1462
1463 /* bond must be initialized by bond_open() before enslaving */
1464 if (!(bond_dev->flags & IFF_UP)) {
a4aee5c8
JP		 1465 pr_warning("%s: master_dev is not up in bond_enslave\n",
1466 bond_dev->name);
1da177e4
LT		 1467 }
1468
1469 /* already enslaved */
1470 if (slave_dev->flags & IFF_SLAVE) {
5a03cdb7 1471 pr_debug("Error, Device was already enslaved\n");
1da177e4
LT		 1472 return -EBUSY;
1473 }
1474
1475 /* vlan challenged mutual exclusion */
1476 /* no need to lock since we're protected by rtnl_lock */
1477 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
5a03cdb7 1478 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
f35188fa 1479 if (bond->vlgrp) {
a4aee5c8
JP		 1480 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1481 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1482 return -EPERM;
1483 } else {
a4aee5c8
JP		 1484 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1485 bond_dev->name, slave_dev->name,
1486 slave_dev->name, bond_dev->name);
1da177e4
LT		 1487 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1488 }
1489 } else {
5a03cdb7 1490 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
1da177e4
LT		 1491 if (bond->slave_cnt == 0) {
1492 /* First slave, and it is not VLAN challenged,
1493 * so remove the block of adding VLANs over the bond.
1494 */
1495 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1496 }
1497 }
1498
217df670
JV		 1499 /*
1500 * Old ifenslave binaries are no longer supported. These can
3d632c3f 1501 * be identified with moderate accuracy by the state of the slave:
217df670
JV		 1502 * the current ifenslave will set the interface down prior to
1503 * enslaving it; the old ifenslave will not.
1504 */
1505 if ((slave_dev->flags & IFF_UP)) {
a4aee5c8 1506 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
217df670
JV		 1507 slave_dev->name);
1508 res = -EPERM;
1509 goto err_undo_flags;
1510 }
1da177e4 1511
872254dd
MS		 1512 /* set bonding device ether type by slave - bonding netdevices are
1513 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1514 * there is a need to override some of the type dependent attribs/funcs.
1515 *
1516 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1517 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1518 */
1519 if (bond->slave_cnt == 0) {
e36b9d16 1520 if (bond_dev->type != slave_dev->type) {
e36b9d16 1521 pr_debug("%s: change device type from %d to %d\n",
a4aee5c8
JP		 1522 bond_dev->name,
1523 bond_dev->type, slave_dev->type);
75c78500 1524
3ca5b404
JP		 1525 res = netdev_bonding_change(bond_dev,
1526 NETDEV_PRE_TYPE_CHANGE);
1527 res = notifier_to_errno(res);
1528 if (res) {
1529 pr_err("%s: refused to change device type\n",
1530 bond_dev->name);
1531 res = -EBUSY;
1532 goto err_undo_flags;
1533 }
75c78500 1534
32a806c1 1535 /* Flush unicast and multicast addresses */
a748ee24 1536 dev_uc_flush(bond_dev);
22bedad3 1537 dev_mc_flush(bond_dev);
32a806c1 1538
e36b9d16
MS		 1539 if (slave_dev->type != ARPHRD_ETHER)
1540 bond_setup_by_slave(bond_dev, slave_dev);
1541 else
1542 ether_setup(bond_dev);
75c78500 1543
93d9b7d7
JP		 1544 netdev_bonding_change(bond_dev,
1545 NETDEV_POST_TYPE_CHANGE);
e36b9d16 1546 }
872254dd 1547 } else if (bond_dev->type != slave_dev->type) {
a4aee5c8
JP		 1548 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1549 slave_dev->name,
1550 slave_dev->type, bond_dev->type);
1551 res = -EINVAL;
1552 goto err_undo_flags;
872254dd
MS		 1553 }
1554
eb7cc59a 1555 if (slave_ops->ndo_set_mac_address == NULL) {
2ab82852 1556 if (bond->slave_cnt == 0) {
a4aee5c8
JP		 1557 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1558 bond_dev->name);
3915c1e8
JV		 1559 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1560 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
a4aee5c8
JP		 1561 pr_err("%s: Error: The slave device specified does not support setting the MAC address, but fail_over_mac is not set to active.\n",
1562 bond_dev->name);
2ab82852
MS		 1563 res = -EOPNOTSUPP;
1564 goto err_undo_flags;
1565 }
1da177e4
LT		 1566 }
1567
c20811a7
JP		 1568 /* If this is the first slave, then we need to set the master's hardware
1569 * address to be the same as the slave's. */
1570 if (bond->slave_cnt == 0)
1571 memcpy(bond->dev->dev_addr, slave_dev->dev_addr,
1572 slave_dev->addr_len);
1573
1574
243cb4e5 1575 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
1da177e4
LT		 1576 if (!new_slave) {
1577 res = -ENOMEM;
1578 goto err_undo_flags;
1579 }
1580
bb1d9123
AG		 1581 /*
1582 * Set the new_slave's queue_id to be zero. Queue ID mapping
1583 * is set via sysfs or module option if desired.
1584 */
1585 new_slave->queue_id = 0;
1586
b15ba0fb
JP		 1587 /* Save slave's original mtu and then set it to match the bond */
1588 new_slave->original_mtu = slave_dev->mtu;
1589 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1590 if (res) {
1591 pr_debug("Error %d calling dev_set_mtu\n", res);
1592 goto err_free;
1593 }
1594
217df670
JV		 1595 /*
1596 * Save slave's original ("permanent") mac address for modes
1597 * that need it, and for restoring it upon release, and then
1598 * set it to the master's address
1599 */
1600 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
1da177e4 1601
dd957c57 1602 if (!bond->params.fail_over_mac) {
2ab82852
MS		 1603 /*
1604 * Set slave to master's mac address. The application already
1605 * set the master's mac address to that of the first slave
1606 */
1607 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1608 addr.sa_family = slave_dev->type;
1609 res = dev_set_mac_address(slave_dev, &addr);
1610 if (res) {
5a03cdb7 1611 pr_debug("Error %d calling set_mac_address\n", res);
b15ba0fb 1612 goto err_restore_mtu;
2ab82852 1613 }
217df670 1614 }
1da177e4 1615
c2edacf8
JV		 1616 res = netdev_set_master(slave_dev, bond_dev);
1617 if (res) {
5a03cdb7 1618 pr_debug("Error %d calling netdev_set_master\n", res);
569f0c4d 1619 goto err_restore_mac;
c2edacf8 1620 }
217df670
JV		 1621 /* open the slave since the application closed it */
1622 res = dev_open(slave_dev);
1623 if (res) {
3d632c3f 1624 pr_debug("Opening slave %s failed\n", slave_dev->name);
569f0c4d 1625 goto err_unset_master;
1da177e4
LT		 1626 }
1627
1da177e4 1628 new_slave->dev = slave_dev;
0b680e75 1629 slave_dev->priv_flags |= IFF_BONDING;
1da177e4 1630
58402054 1631 if (bond_is_lb(bond)) {
1da177e4
LT		 1632 /* bond_alb_init_slave() must be called before all other stages since
1633 * it might fail and we do not want to have to undo everything
1634 */
1635 res = bond_alb_init_slave(bond, new_slave);
3d632c3f 1636 if (res)
569f0c4d 1637 goto err_close;
1da177e4
LT		 1638 }
1639
1640 /* If the mode USES_PRIMARY, then the new slave gets the
1641 * master's promisc (and mc) settings only if it becomes the
1642 * curr_active_slave, and that is taken care of later when calling
1643 * bond_change_active()
1644 */
1645 if (!USES_PRIMARY(bond->params.mode)) {
1646 /* set promiscuity level to new slave */
1647 if (bond_dev->flags & IFF_PROMISC) {
7e1a1ac1
WC		 1648 res = dev_set_promiscuity(slave_dev, 1);
1649 if (res)
1650 goto err_close;
1da177e4
LT		 1651 }
1652
1653 /* set allmulti level to new slave */
1654 if (bond_dev->flags & IFF_ALLMULTI) {
7e1a1ac1
WC		 1655 res = dev_set_allmulti(slave_dev, 1);
1656 if (res)
1657 goto err_close;
1da177e4
LT		 1658 }
1659
b9e40857 1660 netif_addr_lock_bh(bond_dev);
1da177e4 1661 /* upload master's mc_list to new slave */
22bedad3
JP		 1662 netdev_for_each_mc_addr(ha, bond_dev)
1663 dev_mc_add(slave_dev, ha->addr);
b9e40857 1664 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 1665 }
1666
1667 if (bond->params.mode == BOND_MODE_8023AD) {
1668 /* add lacpdu mc addr to mc list */
1669 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1670
22bedad3 1671 dev_mc_add(slave_dev, lacpdu_multicast);
1da177e4
LT		 1672 }
1673
1674 bond_add_vlans_on_slave(bond, slave_dev);
1675
1676 write_lock_bh(&bond->lock);
1677
1678 bond_attach_slave(bond, new_slave);
1679
1680 new_slave->delay = 0;
1681 new_slave->link_failure_count = 0;
1682
8531c5ff
AK		 1683 bond_compute_features(bond);
1684
3915c1e8
JV		 1685 write_unlock_bh(&bond->lock);
1686
1687 read_lock(&bond->lock);
1688
f5b2b966
JV		 1689 new_slave->last_arp_rx = jiffies;
1690
1da177e4
LT		 1691 if (bond->params.miimon && !bond->params.use_carrier) {
1692 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1693
1694 if ((link_reporting == -1) && !bond->params.arp_interval) {
1695 /*
1696 * miimon is set but a bonded network driver
1697 * does not support ETHTOOL/MII and
1698 * arp_interval is not set. Note: if
1699 * use_carrier is enabled, we will never go
1700 * here (because netif_carrier is always
1701 * supported); thus, we don't need to change
1702 * the messages for netif_carrier.
1703 */
a4aee5c8 1704 pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n",
4e0952c7 1705 bond_dev->name, slave_dev->name);
1da177e4
LT		 1706 } else if (link_reporting == -1) {
1707 /* unable get link status using mii/ethtool */
a4aee5c8
JP		 1708 pr_warning("%s: Warning: can't get link status from interface %s; the network driver associated with this interface does not support MII or ETHTOOL link status reporting, thus miimon has no effect on this interface.\n",
1709 bond_dev->name, slave_dev->name);
1da177e4
LT		 1710 }
1711 }
1712
1713 /* check for initial state */
1714 if (!bond->params.miimon ||
1715 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1716 if (bond->params.updelay) {
a4aee5c8 1717 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
1da177e4
LT		 1718 new_slave->link = BOND_LINK_BACK;
1719 new_slave->delay = bond->params.updelay;
1720 } else {
a4aee5c8 1721 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
1da177e4
LT		 1722 new_slave->link = BOND_LINK_UP;
1723 }
1724 new_slave->jiffies = jiffies;
1725 } else {
a4aee5c8 1726 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
1da177e4
LT		 1727 new_slave->link = BOND_LINK_DOWN;
1728 }
1729
1730 if (bond_update_speed_duplex(new_slave) &&
1731 (new_slave->link != BOND_LINK_DOWN)) {
a4aee5c8
JP		 1732 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1733 bond_dev->name, new_slave->dev->name);
1da177e4
LT		 1734
1735 if (bond->params.mode == BOND_MODE_8023AD) {
a4aee5c8
JP		 1736 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1737 bond_dev->name);
1da177e4
LT		 1738 }
1739 }
1740
1741 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1742 /* if there is a primary slave, remember it */
a549952a 1743 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
1da177e4 1744 bond->primary_slave = new_slave;
a549952a
JP		 1745 bond->force_primary = true;
1746 }
1da177e4
LT		 1747 }
1748
3915c1e8
JV		 1749 write_lock_bh(&bond->curr_slave_lock);
1750
1da177e4
LT		 1751 switch (bond->params.mode) {
1752 case BOND_MODE_ACTIVEBACKUP:
8a8e447b
JV		 1753 bond_set_slave_inactive_flags(new_slave);
1754 bond_select_active_slave(bond);
1da177e4
LT		 1755 break;
1756 case BOND_MODE_8023AD:
1757 /* in 802.3ad mode, the internal mechanism
1758 * will activate the slaves in the selected
1759 * aggregator
1760 */
1761 bond_set_slave_inactive_flags(new_slave);
1762 /* if this is the first slave */
1763 if (bond->slave_cnt == 1) {
1764 SLAVE_AD_INFO(new_slave).id = 1;
1765 /* Initialize AD with the number of times that the AD timer is called in 1 second
1766 * can be called only after the mac address of the bond is set
1767 */
1768 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1769 bond->params.lacp_fast);
1770 } else {
1771 SLAVE_AD_INFO(new_slave).id =
1772 SLAVE_AD_INFO(new_slave->prev).id + 1;
1773 }
1774
1775 bond_3ad_bind_slave(new_slave);
1776 break;
1777 case BOND_MODE_TLB:
1778 case BOND_MODE_ALB:
1779 new_slave->state = BOND_STATE_ACTIVE;
059fe7a5 1780 bond_set_slave_inactive_flags(new_slave);
5a29f789 1781 bond_select_active_slave(bond);
1da177e4
LT		 1782 break;
1783 default:
5a03cdb7 1784 pr_debug("This slave is always active in trunk mode\n");
1da177e4
LT		 1785
1786 /* always active in trunk mode */
1787 new_slave->state = BOND_STATE_ACTIVE;
1788
1789 /* In trunking mode there is little meaning to curr_active_slave
1790 * anyway (it holds no special properties of the bond device),
1791 * so we can change it without calling change_active_interface()
1792 */
3d632c3f 1793 if (!bond->curr_active_slave)
1da177e4 1794 bond->curr_active_slave = new_slave;
3d632c3f 1795
1da177e4
LT		 1796 break;
1797 } /* switch(bond_mode) */
1798
3915c1e8
JV		 1799 write_unlock_bh(&bond->curr_slave_lock);
1800
ff59c456
JV		 1801 bond_set_carrier(bond);
1802
f6dc31a8 1803#ifdef CONFIG_NET_POLL_CONTROLLER
c22d7ac8
AG		 1804 /*
1805 * Netpoll and bonding is broken, make sure it is not initialized
1806 * until it is fixed.
1807 */
1808 if (disable_netpoll) {
f6dc31a8 1809 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
c22d7ac8
AG		 1810 } else {
1811 if (slaves_support_netpoll(bond_dev)) {
1812 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
1813 if (bond_dev->npinfo)
1814 slave_dev->npinfo = bond_dev->npinfo;
1815 } else if (!(bond_dev->priv_flags & IFF_DISABLE_NETPOLL)) {
1816 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
1817 pr_info("New slave device %s does not support netpoll\n",
1818 slave_dev->name);
1819 pr_info("Disabling netpoll support for %s\n", bond_dev->name);
1820 }
f6dc31a8
WC		 1821 }
1822#endif
3915c1e8 1823 read_unlock(&bond->lock);
1da177e4 1824
b76cdba9
MW		 1825 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1826 if (res)
569f0c4d 1827 goto err_close;
b76cdba9 1828
a4aee5c8
JP		 1829 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1830 bond_dev->name, slave_dev->name,
1831 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1832 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
1da177e4
LT		 1833
1834 /* enslave is successful */
1835 return 0;
1836
1837/* Undo stages on error */
1da177e4
LT		 1838err_close:
1839 dev_close(slave_dev);
1840
569f0c4d
JV		 1841err_unset_master:
1842 netdev_set_master(slave_dev, NULL);
1843
1da177e4 1844err_restore_mac:
dd957c57 1845 if (!bond->params.fail_over_mac) {
3915c1e8
JV		 1846 /* XXX TODO - fom follow mode needs to change master's
1847 * MAC if this slave's MAC is in use by the bond, or at
1848 * least print a warning.
1849 */
2ab82852
MS		 1850 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1851 addr.sa_family = slave_dev->type;
1852 dev_set_mac_address(slave_dev, &addr);
1853 }
1da177e4 1854
b15ba0fb
JP		 1855err_restore_mtu:
1856 dev_set_mtu(slave_dev, new_slave->original_mtu);
1857
1da177e4
LT		 1858err_free:
1859 kfree(new_slave);
1860
1861err_undo_flags:
1862 bond_dev->features = old_features;
3d632c3f 1863
1da177e4
LT		 1864 return res;
1865}
1866
1867/*
1868 * Try to release the slave device <slave> from the bond device <master>
1869 * It is legal to access curr_active_slave without a lock because all the function
1870 * is write-locked.
1871 *
1872 * The rules for slave state should be:
1873 * for Active/Backup:
1874 * Active stays on all backups go down
1875 * for Bonded connections:
1876 * The first up interface should be left on and all others downed.
1877 */
a77b5325 1878int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
1da177e4 1879{
454d7c9b 1880 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 1881 struct slave *slave, *oldcurrent;
1882 struct sockaddr addr;
1da177e4
LT		 1883
1884 /* slave is not a slave or master is not master of this slave */
1885 if (!(slave_dev->flags & IFF_SLAVE) ||
1886 (slave_dev->master != bond_dev)) {
a4aee5c8 1887 pr_err("%s: Error: cannot release %s.\n",
1da177e4
LT		 1888 bond_dev->name, slave_dev->name);
1889 return -EINVAL;
1890 }
1891
f6dc31a8 1892 netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE);
1da177e4
LT		 1893 write_lock_bh(&bond->lock);
1894
1895 slave = bond_get_slave_by_dev(bond, slave_dev);
1896 if (!slave) {
1897 /* not a slave of this bond */
a4aee5c8
JP		 1898 pr_info("%s: %s not enslaved\n",
1899 bond_dev->name, slave_dev->name);
f5e2a7b2 1900 write_unlock_bh(&bond->lock);
1da177e4
LT		 1901 return -EINVAL;
1902 }
1903
3915c1e8 1904 if (!bond->params.fail_over_mac) {
8e95a202
JP		 1905 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1906 bond->slave_cnt > 1)
a4aee5c8
JP		 1907 pr_warning("%s: Warning: the permanent HWaddr of %s - %pM - is still in use by %s. Set the HWaddr of %s to a different address to avoid conflicts.\n",
1908 bond_dev->name, slave_dev->name,
1909 slave->perm_hwaddr,
1910 bond_dev->name, slave_dev->name);
1da177e4
LT		 1911 }
1912
1913 /* Inform AD package of unbinding of slave. */
1914 if (bond->params.mode == BOND_MODE_8023AD) {
1915 /* must be called before the slave is
1916 * detached from the list
1917 */
1918 bond_3ad_unbind_slave(slave);
1919 }
1920
a4aee5c8
JP		 1921 pr_info("%s: releasing %s interface %s\n",
1922 bond_dev->name,
1923 (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup",
1924 slave_dev->name);
1da177e4
LT		 1925
1926 oldcurrent = bond->curr_active_slave;
1927
1928 bond->current_arp_slave = NULL;
1929
1930 /* release the slave from its bond */
1931 bond_detach_slave(bond, slave);
1932
8531c5ff
AK		 1933 bond_compute_features(bond);
1934
3d632c3f 1935 if (bond->primary_slave == slave)
1da177e4 1936 bond->primary_slave = NULL;
1da177e4 1937
3d632c3f 1938 if (oldcurrent == slave)
1da177e4 1939 bond_change_active_slave(bond, NULL);
1da177e4 1940
58402054 1941 if (bond_is_lb(bond)) {
1da177e4
LT		 1942 /* Must be called only after the slave has been
1943 * detached from the list and the curr_active_slave
1944 * has been cleared (if our_slave == old_current),
1945 * but before a new active slave is selected.
1946 */
2543331d 1947 write_unlock_bh(&bond->lock);
1da177e4 1948 bond_alb_deinit_slave(bond, slave);
2543331d 1949 write_lock_bh(&bond->lock);
1da177e4
LT		 1950 }
1951
059fe7a5
JV		 1952 if (oldcurrent == slave) {
1953 /*
1954 * Note that we hold RTNL over this sequence, so there
1955 * is no concern that another slave add/remove event
1956 * will interfere.
1957 */
1958 write_unlock_bh(&bond->lock);
1959 read_lock(&bond->lock);
1960 write_lock_bh(&bond->curr_slave_lock);
1961
1da177e4
LT		 1962 bond_select_active_slave(bond);
1963
059fe7a5
JV		 1964 write_unlock_bh(&bond->curr_slave_lock);
1965 read_unlock(&bond->lock);
1966 write_lock_bh(&bond->lock);
1967 }
1968
1da177e4 1969 if (bond->slave_cnt == 0) {
ff59c456
JV		 1970 bond_set_carrier(bond);
1971
1da177e4
LT		 1972 /* if the last slave was removed, zero the mac address
1973 * of the master so it will be set by the application
1974 * to the mac address of the first slave
1975 */
1976 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1977
f35188fa 1978 if (!bond->vlgrp) {
1da177e4
LT		 1979 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1980 } else {
a4aee5c8
JP		 1981 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1982 bond_dev->name, bond_dev->name);
1983 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1984 bond_dev->name);
1da177e4
LT		 1985 }
1986 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1987 !bond_has_challenged_slaves(bond)) {
a4aee5c8
JP		 1988 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1989 bond_dev->name, slave_dev->name, bond_dev->name);
1da177e4
LT		 1990 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1991 }
1992
1993 write_unlock_bh(&bond->lock);
1994
b76cdba9
MW		 1995 /* must do this from outside any spinlocks */
1996 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1997
1da177e4
LT		 1998 bond_del_vlans_from_slave(bond, slave_dev);
1999
2000 /* If the mode USES_PRIMARY, then we should only remove its
2001 * promisc and mc settings if it was the curr_active_slave, but that was
2002 * already taken care of above when we detached the slave
2003 */
2004 if (!USES_PRIMARY(bond->params.mode)) {
2005 /* unset promiscuity level from slave */
3d632c3f 2006 if (bond_dev->flags & IFF_PROMISC)
1da177e4 2007 dev_set_promiscuity(slave_dev, -1);
1da177e4
LT		 2008
2009 /* unset allmulti level from slave */
3d632c3f 2010 if (bond_dev->flags & IFF_ALLMULTI)
1da177e4 2011 dev_set_allmulti(slave_dev, -1);
1da177e4
LT		 2012
2013 /* flush master's mc_list from slave */
b9e40857 2014 netif_addr_lock_bh(bond_dev);
1da177e4 2015 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2016 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 2017 }
2018
2019 netdev_set_master(slave_dev, NULL);
2020
f6dc31a8
WC		 2021#ifdef CONFIG_NET_POLL_CONTROLLER
2022 read_lock_bh(&bond->lock);
c22d7ac8
AG		 2023
2024 /* Make sure netpoll over stays disabled until fixed. */
2025 if (!disable_netpoll)
2026 if (slaves_support_netpoll(bond_dev))
2027 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
f6dc31a8
WC		 2028 read_unlock_bh(&bond->lock);
2029 if (slave_dev->netdev_ops->ndo_netpoll_cleanup)
2030 slave_dev->netdev_ops->ndo_netpoll_cleanup(slave_dev);
2031 else
2032 slave_dev->npinfo = NULL;
2033#endif
2034
1da177e4
LT		 2035 /* close slave before restoring its mac address */
2036 dev_close(slave_dev);
2037
3915c1e8 2038 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
2ab82852
MS		 2039 /* restore original ("permanent") mac address */
2040 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2041 addr.sa_family = slave_dev->type;
2042 dev_set_mac_address(slave_dev, &addr);
2043 }
1da177e4 2044
b15ba0fb
JP		 2045 dev_set_mtu(slave_dev, slave->original_mtu);
2046
8f903c70 2047 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
f5b2b966
JV		 2048 IFF_SLAVE_INACTIVE | IFF_BONDING |
2049 IFF_SLAVE_NEEDARP);
1da177e4
LT		 2050
2051 kfree(slave);
2052
2053 return 0; /* deletion OK */
2054}
2055
d90a162a 2056/*
3d632c3f 2057* First release a slave and than destroy the bond if no more slaves are left.
d90a162a
MS		 2058* Must be under rtnl_lock when this function is called.
2059*/
3d632c3f
SH		 2060int bond_release_and_destroy(struct net_device *bond_dev,
2061 struct net_device *slave_dev)
d90a162a 2062{
454d7c9b 2063 struct bonding *bond = netdev_priv(bond_dev);
d90a162a
MS		 2064 int ret;
2065
2066 ret = bond_release(bond_dev, slave_dev);
2067 if ((ret == 0) && (bond->slave_cnt == 0)) {
a4aee5c8
JP		 2068 pr_info("%s: destroying bond %s.\n",
2069 bond_dev->name, bond_dev->name);
9e71626c 2070 unregister_netdevice(bond_dev);
d90a162a
MS		 2071 }
2072 return ret;
2073}
2074
1da177e4
LT		 2075/*
2076 * This function releases all slaves.
2077 */
2078static int bond_release_all(struct net_device *bond_dev)
2079{
454d7c9b 2080 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2081 struct slave *slave;
2082 struct net_device *slave_dev;
2083 struct sockaddr addr;
2084
2085 write_lock_bh(&bond->lock);
2086
ff59c456
JV		 2087 netif_carrier_off(bond_dev);
2088
3d632c3f 2089 if (bond->slave_cnt == 0)
1da177e4 2090 goto out;
1da177e4
LT		 2091
2092 bond->current_arp_slave = NULL;
2093 bond->primary_slave = NULL;
2094 bond_change_active_slave(bond, NULL);
2095
2096 while ((slave = bond->first_slave) != NULL) {
2097 /* Inform AD package of unbinding of slave
2098 * before slave is detached from the list.
2099 */
3d632c3f 2100 if (bond->params.mode == BOND_MODE_8023AD)
1da177e4 2101 bond_3ad_unbind_slave(slave);
1da177e4
LT		 2102
2103 slave_dev = slave->dev;
2104 bond_detach_slave(bond, slave);
2105
2543331d
JV		 2106 /* now that the slave is detached, unlock and perform
2107 * all the undo steps that should not be called from
2108 * within a lock.
2109 */
2110 write_unlock_bh(&bond->lock);
2111
58402054 2112 if (bond_is_lb(bond)) {
1da177e4
LT		 2113 /* must be called only after the slave
2114 * has been detached from the list
2115 */
2116 bond_alb_deinit_slave(bond, slave);
2117 }
2118
8531c5ff
AK		 2119 bond_compute_features(bond);
2120
b76cdba9 2121 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1da177e4
LT		 2122 bond_del_vlans_from_slave(bond, slave_dev);
2123
2124 /* If the mode USES_PRIMARY, then we should only remove its
2125 * promisc and mc settings if it was the curr_active_slave, but that was
2126 * already taken care of above when we detached the slave
2127 */
2128 if (!USES_PRIMARY(bond->params.mode)) {
2129 /* unset promiscuity level from slave */
3d632c3f 2130 if (bond_dev->flags & IFF_PROMISC)
1da177e4 2131 dev_set_promiscuity(slave_dev, -1);
1da177e4
LT		 2132
2133 /* unset allmulti level from slave */
3d632c3f 2134 if (bond_dev->flags & IFF_ALLMULTI)
1da177e4 2135 dev_set_allmulti(slave_dev, -1);
1da177e4
LT		 2136
2137 /* flush master's mc_list from slave */
b9e40857 2138 netif_addr_lock_bh(bond_dev);
1da177e4 2139 bond_mc_list_flush(bond_dev, slave_dev);
b9e40857 2140 netif_addr_unlock_bh(bond_dev);
1da177e4
LT		 2141 }
2142
2143 netdev_set_master(slave_dev, NULL);
2144
2145 /* close slave before restoring its mac address */
2146 dev_close(slave_dev);
2147
dd957c57 2148 if (!bond->params.fail_over_mac) {
2ab82852
MS		 2149 /* restore original ("permanent") mac address*/
2150 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2151 addr.sa_family = slave_dev->type;
2152 dev_set_mac_address(slave_dev, &addr);
2153 }
1da177e4 2154
8f903c70
JV		 2155 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2156 IFF_SLAVE_INACTIVE);
1da177e4
LT		 2157
2158 kfree(slave);
2159
2160 /* re-acquire the lock before getting the next slave */
2161 write_lock_bh(&bond->lock);
2162 }
2163
2164 /* zero the mac address of the master so it will be
2165 * set by the application to the mac address of the
2166 * first slave
2167 */
2168 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2169
f35188fa 2170 if (!bond->vlgrp) {
1da177e4 2171 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
f35188fa 2172 } else {
a4aee5c8
JP		 2173 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2174 bond_dev->name, bond_dev->name);
2175 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2176 bond_dev->name);
1da177e4
LT		 2177 }
2178
a4aee5c8 2179 pr_info("%s: released all slaves\n", bond_dev->name);
1da177e4
LT		 2180
2181out:
2182 write_unlock_bh(&bond->lock);
2183
2184 return 0;
2185}
2186
2187/*
2188 * This function changes the active slave to slave <slave_dev>.
2189 * It returns -EINVAL in the following cases.
2190 * - <slave_dev> is not found in the list.
2191 * - There is not active slave now.
2192 * - <slave_dev> is already active.
2193 * - The link state of <slave_dev> is not BOND_LINK_UP.
2194 * - <slave_dev> is not running.
3d632c3f
SH		 2195 * In these cases, this function does nothing.
2196 * In the other cases, current_slave pointer is changed and 0 is returned.
1da177e4
LT		 2197 */
2198static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2199{
454d7c9b 2200 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2201 struct slave *old_active = NULL;
2202 struct slave *new_active = NULL;
2203 int res = 0;
2204
3d632c3f 2205 if (!USES_PRIMARY(bond->params.mode))
1da177e4 2206 return -EINVAL;
1da177e4
LT		 2207
2208 /* Verify that master_dev is indeed the master of slave_dev */
3d632c3f 2209 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
1da177e4 2210 return -EINVAL;
1da177e4 2211
059fe7a5 2212 read_lock(&bond->lock);
1da177e4 2213
059fe7a5 2214 read_lock(&bond->curr_slave_lock);
1da177e4 2215 old_active = bond->curr_active_slave;
059fe7a5
JV		 2216 read_unlock(&bond->curr_slave_lock);
2217
1da177e4
LT		 2218 new_active = bond_get_slave_by_dev(bond, slave_dev);
2219
2220 /*
2221 * Changing to the current active: do nothing; return success.
2222 */
2223 if (new_active && (new_active == old_active)) {
059fe7a5 2224 read_unlock(&bond->lock);
1da177e4
LT		 2225 return 0;
2226 }
2227
2228 if ((new_active) &&
2229 (old_active) &&
2230 (new_active->link == BOND_LINK_UP) &&
2231 IS_UP(new_active->dev)) {
059fe7a5 2232 write_lock_bh(&bond->curr_slave_lock);
1da177e4 2233 bond_change_active_slave(bond, new_active);
059fe7a5 2234 write_unlock_bh(&bond->curr_slave_lock);
3d632c3f 2235 } else
1da177e4 2236 res = -EINVAL;
1da177e4 2237
059fe7a5 2238 read_unlock(&bond->lock);
1da177e4
LT		 2239
2240 return res;
2241}
2242
1da177e4
LT		 2243static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2244{
454d7c9b 2245 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 2246
2247 info->bond_mode = bond->params.mode;
2248 info->miimon = bond->params.miimon;
2249
6603a6f2 2250 read_lock(&bond->lock);
1da177e4 2251 info->num_slaves = bond->slave_cnt;
6603a6f2 2252 read_unlock(&bond->lock);
1da177e4
LT		 2253
2254 return 0;
2255}
2256
2257static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2258{
454d7c9b 2259 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 2260 struct slave *slave;
689c96cc 2261 int i, res = -ENODEV;
1da177e4 2262
6603a6f2 2263 read_lock(&bond->lock);
1da177e4
LT		 2264
2265 bond_for_each_slave(bond, slave, i) {
2266 if (i == (int)info->slave_id) {
689c96cc
ED		 2267 res = 0;
2268 strcpy(info->slave_name, slave->dev->name);
2269 info->link = slave->link;
2270 info->state = slave->state;
2271 info->link_failure_count = slave->link_failure_count;
1da177e4
LT		 2272 break;
2273 }
2274 }
2275
6603a6f2 2276 read_unlock(&bond->lock);
1da177e4 2277
689c96cc 2278 return res;
1da177e4
LT		 2279}
2280
2281/*-------------------------------- Monitoring -------------------------------*/
2282
1da177e4 2283
f0c76d61
JV		 2284static int bond_miimon_inspect(struct bonding *bond)
2285{
2286 struct slave *slave;
2287 int i, link_state, commit = 0;
41f89100
JP		 2288 bool ignore_updelay;
2289
2290 ignore_updelay = !bond->curr_active_slave ? true : false;
1da177e4
LT		 2291
2292 bond_for_each_slave(bond, slave, i) {
f0c76d61 2293 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2294
f0c76d61 2295 link_state = bond_check_dev_link(bond, slave->dev, 0);
1da177e4
LT		 2296
2297 switch (slave->link) {
f0c76d61
JV		 2298 case BOND_LINK_UP:
2299 if (link_state)
2300 continue;
1da177e4 2301
f0c76d61
JV		 2302 slave->link = BOND_LINK_FAIL;
2303 slave->delay = bond->params.downdelay;
2304 if (slave->delay) {
a4aee5c8
JP		 2305 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2306 bond->dev->name,
2307 (bond->params.mode ==
2308 BOND_MODE_ACTIVEBACKUP) ?
2309 ((slave->state == BOND_STATE_ACTIVE) ?
2310 "active " : "backup ") : "",
2311 slave->dev->name,
2312 bond->params.downdelay * bond->params.miimon);
1da177e4 2313 }
f0c76d61
JV		 2314 /*FALLTHRU*/
2315 case BOND_LINK_FAIL:
2316 if (link_state) {
2317 /*
2318 * recovered before downdelay expired
2319 */
2320 slave->link = BOND_LINK_UP;
1da177e4 2321 slave->jiffies = jiffies;
a4aee5c8
JP		 2322 pr_info("%s: link status up again after %d ms for interface %s.\n",
2323 bond->dev->name,
2324 (bond->params.downdelay - slave->delay) *
2325 bond->params.miimon,
2326 slave->dev->name);
f0c76d61 2327 continue;
1da177e4 2328 }
f0c76d61
JV		 2329
2330 if (slave->delay <= 0) {
2331 slave->new_link = BOND_LINK_DOWN;
2332 commit++;
2333 continue;
1da177e4 2334 }
1da177e4 2335
f0c76d61
JV		 2336 slave->delay--;
2337 break;
2338
2339 case BOND_LINK_DOWN:
2340 if (!link_state)
2341 continue;
2342
2343 slave->link = BOND_LINK_BACK;
2344 slave->delay = bond->params.updelay;
2345
2346 if (slave->delay) {
a4aee5c8
JP		 2347 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2348 bond->dev->name, slave->dev->name,
2349 ignore_updelay ? 0 :
2350 bond->params.updelay *
2351 bond->params.miimon);
f0c76d61
JV		 2352 }
2353 /*FALLTHRU*/
2354 case BOND_LINK_BACK:
2355 if (!link_state) {
2356 slave->link = BOND_LINK_DOWN;
a4aee5c8
JP		 2357 pr_info("%s: link status down again after %d ms for interface %s.\n",
2358 bond->dev->name,
2359 (bond->params.updelay - slave->delay) *
2360 bond->params.miimon,
2361 slave->dev->name);
f0c76d61
JV		 2362
2363 continue;
2364 }
2365
41f89100
JP		 2366 if (ignore_updelay)
2367 slave->delay = 0;
2368
f0c76d61
JV		 2369 if (slave->delay <= 0) {
2370 slave->new_link = BOND_LINK_UP;
2371 commit++;
41f89100 2372 ignore_updelay = false;
f0c76d61 2373 continue;
1da177e4 2374 }
f0c76d61
JV		 2375
2376 slave->delay--;
1da177e4 2377 break;
f0c76d61
JV		 2378 }
2379 }
1da177e4 2380
f0c76d61
JV		 2381 return commit;
2382}
1da177e4 2383
f0c76d61
JV		 2384static void bond_miimon_commit(struct bonding *bond)
2385{
2386 struct slave *slave;
2387 int i;
2388
2389 bond_for_each_slave(bond, slave, i) {
2390 switch (slave->new_link) {
2391 case BOND_LINK_NOCHANGE:
2392 continue;
1da177e4 2393
f0c76d61
JV		 2394 case BOND_LINK_UP:
2395 slave->link = BOND_LINK_UP;
2396 slave->jiffies = jiffies;
2397
2398 if (bond->params.mode == BOND_MODE_8023AD) {
2399 /* prevent it from being the active one */
2400 slave->state = BOND_STATE_BACKUP;
2401 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2402 /* make it immediately active */
2403 slave->state = BOND_STATE_ACTIVE;
2404 } else if (slave != bond->primary_slave) {
2405 /* prevent it from being the active one */
2406 slave->state = BOND_STATE_BACKUP;
1da177e4 2407 }
1da177e4 2408
546add79
KPO		 2409 bond_update_speed_duplex(slave);
2410
700c2a77
KPO		 2411 pr_info("%s: link status definitely up for interface %s, %d Mbps %s duplex.\n",
2412 bond->dev->name, slave->dev->name,
2413 slave->speed, slave->duplex ? "full" : "half");
1da177e4 2414
f0c76d61
JV		 2415 /* notify ad that the link status has changed */
2416 if (bond->params.mode == BOND_MODE_8023AD)
2417 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
059fe7a5 2418
58402054 2419 if (bond_is_lb(bond))
f0c76d61
JV		 2420 bond_alb_handle_link_change(bond, slave,
2421 BOND_LINK_UP);
1da177e4 2422
f0c76d61
JV		 2423 if (!bond->curr_active_slave ||
2424 (slave == bond->primary_slave))
2425 goto do_failover;
1da177e4 2426
f0c76d61 2427 continue;
059fe7a5 2428
f0c76d61 2429 case BOND_LINK_DOWN:
fba4acda
JV		 2430 if (slave->link_failure_count < UINT_MAX)
2431 slave->link_failure_count++;
2432
f0c76d61 2433 slave->link = BOND_LINK_DOWN;
1da177e4 2434
f0c76d61
JV		 2435 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2436 bond->params.mode == BOND_MODE_8023AD)
2437 bond_set_slave_inactive_flags(slave);
2438
a4aee5c8
JP		 2439 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2440 bond->dev->name, slave->dev->name);
f0c76d61
JV		 2441
2442 if (bond->params.mode == BOND_MODE_8023AD)
2443 bond_3ad_handle_link_change(slave,
2444 BOND_LINK_DOWN);
2445
ae63e808 2446 if (bond_is_lb(bond))
f0c76d61
JV		 2447 bond_alb_handle_link_change(bond, slave,
2448 BOND_LINK_DOWN);
2449
2450 if (slave == bond->curr_active_slave)
2451 goto do_failover;
2452
2453 continue;
2454
2455 default:
a4aee5c8 2456 pr_err("%s: invalid new link %d on slave %s\n",
f0c76d61
JV		 2457 bond->dev->name, slave->new_link,
2458 slave->dev->name);
2459 slave->new_link = BOND_LINK_NOCHANGE;
2460
2461 continue;
2462 }
2463
2464do_failover:
2465 ASSERT_RTNL();
2466 write_lock_bh(&bond->curr_slave_lock);
2467 bond_select_active_slave(bond);
2468 write_unlock_bh(&bond->curr_slave_lock);
2469 }
2470
2471 bond_set_carrier(bond);
1da177e4
LT		 2472}
2473
0b0eef66
JV		 2474/*
2475 * bond_mii_monitor
2476 *
2477 * Really a wrapper that splits the mii monitor into two phases: an
f0c76d61
JV		 2478 * inspection, then (if inspection indicates something needs to be done)
2479 * an acquisition of appropriate locks followed by a commit phase to
2480 * implement whatever link state changes are indicated.
0b0eef66
JV		 2481 */
2482void bond_mii_monitor(struct work_struct *work)
2483{
2484 struct bonding *bond = container_of(work, struct bonding,
2485 mii_work.work);
0b0eef66
JV		 2486
2487 read_lock(&bond->lock);
f0c76d61
JV		 2488 if (bond->kill_timers)
2489 goto out;
2490
2491 if (bond->slave_cnt == 0)
2492 goto re_arm;
b59f9f74
JV		 2493
2494 if (bond->send_grat_arp) {
2495 read_lock(&bond->curr_slave_lock);
2496 bond_send_gratuitous_arp(bond);
2497 read_unlock(&bond->curr_slave_lock);
2498 }
2499
305d552a
BH		 2500 if (bond->send_unsol_na) {
2501 read_lock(&bond->curr_slave_lock);
2502 bond_send_unsolicited_na(bond);
2503 read_unlock(&bond->curr_slave_lock);
2504 }
2505
f0c76d61 2506 if (bond_miimon_inspect(bond)) {
0b0eef66
JV		 2507 read_unlock(&bond->lock);
2508 rtnl_lock();
2509 read_lock(&bond->lock);
f0c76d61
JV		 2510
2511 bond_miimon_commit(bond);
2512
5655662d
JV		 2513 read_unlock(&bond->lock);
2514 rtnl_unlock(); /* might sleep, hold no other locks */
2515 read_lock(&bond->lock);
0b0eef66
JV		 2516 }
2517
f0c76d61
JV		 2518re_arm:
2519 if (bond->params.miimon)
2520 queue_delayed_work(bond->wq, &bond->mii_work,
2521 msecs_to_jiffies(bond->params.miimon));
2522out:
0b0eef66 2523 read_unlock(&bond->lock);
0b0eef66 2524}
c3ade5ca 2525
d3bb52b0 2526static __be32 bond_glean_dev_ip(struct net_device *dev)
c3ade5ca
JV		 2527{
2528 struct in_device *idev;
2529 struct in_ifaddr *ifa;
a144ea4b 2530 __be32 addr = 0;
c3ade5ca
JV		 2531
2532 if (!dev)
2533 return 0;
2534
2535 rcu_read_lock();
e5ed6399 2536 idev = __in_dev_get_rcu(dev);
c3ade5ca
JV		 2537 if (!idev)
2538 goto out;
2539
2540 ifa = idev->ifa_list;
2541 if (!ifa)
2542 goto out;
2543
2544 addr = ifa->ifa_local;
2545out:
2546 rcu_read_unlock();
2547 return addr;
2548}
2549
d3bb52b0 2550static int bond_has_this_ip(struct bonding *bond, __be32 ip)
f5b2b966 2551{
0883beca 2552 struct vlan_entry *vlan;
f5b2b966
JV		 2553
2554 if (ip == bond->master_ip)
2555 return 1;
2556
0883beca 2557 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f5b2b966
JV		 2558 if (ip == vlan->vlan_ip)
2559 return 1;
2560 }
2561
2562 return 0;
2563}
2564
c3ade5ca
JV		 2565/*
2566 * We go to the (large) trouble of VLAN tagging ARP frames because
2567 * switches in VLAN mode (especially if ports are configured as
2568 * "native" to a VLAN) might not pass non-tagged frames.
2569 */
d3bb52b0 2570static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
c3ade5ca
JV		 2571{
2572 struct sk_buff *skb;
2573
5a03cdb7 2574 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
a4aee5c8 2575 slave_dev->name, dest_ip, src_ip, vlan_id);
3d632c3f 2576
c3ade5ca
JV		 2577 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2578 NULL, slave_dev->dev_addr, NULL);
2579
2580 if (!skb) {
a4aee5c8 2581 pr_err("ARP packet allocation failed\n");
c3ade5ca
JV		 2582 return;
2583 }
2584 if (vlan_id) {
2585 skb = vlan_put_tag(skb, vlan_id);
2586 if (!skb) {
a4aee5c8 2587 pr_err("failed to insert VLAN tag\n");
c3ade5ca
JV		 2588 return;
2589 }
2590 }
2591 arp_xmit(skb);
2592}
2593
2594
1da177e4
LT		 2595static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2596{
c3ade5ca 2597 int i, vlan_id, rv;
d3bb52b0 2598 __be32 *targets = bond->params.arp_targets;
0883beca 2599 struct vlan_entry *vlan;
c3ade5ca
JV		 2600 struct net_device *vlan_dev;
2601 struct flowi fl;
2602 struct rtable *rt;
1da177e4 2603
6b780567
MW		 2604 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2605 if (!targets[i])
5a31bec0 2606 break;
5a03cdb7 2607 pr_debug("basa: target %x\n", targets[i]);
f35188fa 2608 if (!bond->vlgrp) {
5a03cdb7 2609 pr_debug("basa: empty vlan: arp_send\n");
c3ade5ca
JV		 2610 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2611 bond->master_ip, 0);
2612 continue;
2613 }
2614
2615 /*
2616 * If VLANs are configured, we do a route lookup to
2617 * determine which VLAN interface would be used, so we
2618 * can tag the ARP with the proper VLAN tag.
2619 */
2620 memset(&fl, 0, sizeof(fl));
2621 fl.fl4_dst = targets[i];
2622 fl.fl4_tos = RTO_ONLINK;
2623
ec87fd3b 2624 rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
c3ade5ca
JV		 2625 if (rv) {
2626 if (net_ratelimit()) {
a4aee5c8
JP		 2627 pr_warning("%s: no route to arp_ip_target %pI4\n",
2628 bond->dev->name, &fl.fl4_dst);
c3ade5ca
JV		 2629 }
2630 continue;
2631 }
2632
2633 /*
2634 * This target is not on a VLAN
2635 */
d8d1f30b 2636 if (rt->dst.dev == bond->dev) {
ed4b9f80 2637 ip_rt_put(rt);
5a03cdb7 2638 pr_debug("basa: rtdev == bond->dev: arp_send\n");
c3ade5ca
JV		 2639 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2640 bond->master_ip, 0);
2641 continue;
2642 }
2643
2644 vlan_id = 0;
0883beca 2645 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2646 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
d8d1f30b 2647 if (vlan_dev == rt->dst.dev) {
c3ade5ca 2648 vlan_id = vlan->vlan_id;
5a03cdb7 2649 pr_debug("basa: vlan match on %s %d\n",
c3ade5ca
JV		 2650 vlan_dev->name, vlan_id);
2651 break;
2652 }
2653 }
2654
2655 if (vlan_id) {
ed4b9f80 2656 ip_rt_put(rt);
c3ade5ca
JV		 2657 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2658 vlan->vlan_ip, vlan_id);
2659 continue;
2660 }
2661
2662 if (net_ratelimit()) {
a4aee5c8
JP		 2663 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2664 bond->dev->name, &fl.fl4_dst,
d8d1f30b 2665 rt->dst.dev ? rt->dst.dev->name : "NULL");
c3ade5ca 2666 }
ed4b9f80 2667 ip_rt_put(rt);
c3ade5ca
JV		 2668 }
2669}
2670
2671/*
2672 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2673 * for each VLAN above us.
b59f9f74
JV		 2674 *
2675 * Caller must hold curr_slave_lock for read or better
c3ade5ca
JV		 2676 */
2677static void bond_send_gratuitous_arp(struct bonding *bond)
2678{
2679 struct slave *slave = bond->curr_active_slave;
2680 struct vlan_entry *vlan;
2681 struct net_device *vlan_dev;
2682
a4aee5c8
JP		 2683 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2684 bond->dev->name, slave ? slave->dev->name : "NULL");
b59f9f74
JV		 2685
2686 if (!slave || !bond->send_grat_arp ||
2687 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
c3ade5ca
JV		 2688 return;
2689
b59f9f74
JV		 2690 bond->send_grat_arp--;
2691
c3ade5ca
JV		 2692 if (bond->master_ip) {
2693 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
1053f62c 2694 bond->master_ip, 0);
c3ade5ca
JV		 2695 }
2696
f35188fa
JV		 2697 if (!bond->vlgrp)
2698 return;
2699
c3ade5ca 2700 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
5c15bdec 2701 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 2702 if (vlan->vlan_ip) {
2703 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2704 vlan->vlan_ip, vlan->vlan_id);
2705 }
1da177e4
LT		 2706 }
2707}
2708
d3bb52b0 2709static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
f5b2b966
JV		 2710{
2711 int i;
d3bb52b0 2712 __be32 *targets = bond->params.arp_targets;
f5b2b966 2713
f5b2b966 2714 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
5a03cdb7 2715 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
a4aee5c8
JP		 2716 &sip, &tip, i, &targets[i],
2717 bond_has_this_ip(bond, tip));
f5b2b966
JV		 2718 if (sip == targets[i]) {
2719 if (bond_has_this_ip(bond, tip))
2720 slave->last_arp_rx = jiffies;
2721 return;
2722 }
2723 }
2724}
2725
2726static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2727{
2728 struct arphdr *arp;
2729 struct slave *slave;
2730 struct bonding *bond;
2731 unsigned char *arp_ptr;
d3bb52b0 2732 __be32 sip, tip;
f5b2b966 2733
1f3c8804
AG		 2734 if (dev->priv_flags & IFF_802_1Q_VLAN) {
2735 /*
2736 * When using VLANS and bonding, dev and oriv_dev may be
2737 * incorrect if the physical interface supports VLAN
2738 * acceleration. With this change ARP validation now
2739 * works for hosts only reachable on the VLAN interface.
2740 */
2741 dev = vlan_dev_real_dev(dev);
2742 orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif);
2743 }
2744
f5b2b966
JV		 2745 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2746 goto out;
2747
454d7c9b 2748 bond = netdev_priv(dev);
f5b2b966
JV		 2749 read_lock(&bond->lock);
2750
5a03cdb7 2751 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
a4aee5c8
JP		 2752 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2753 orig_dev ? orig_dev->name : "NULL");
f5b2b966
JV		 2754
2755 slave = bond_get_slave_by_dev(bond, orig_dev);
2756 if (!slave || !slave_do_arp_validate(bond, slave))
2757 goto out_unlock;
2758
988b7050 2759 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
f5b2b966
JV		 2760 goto out_unlock;
2761
d0a92be0 2762 arp = arp_hdr(skb);
f5b2b966
JV		 2763 if (arp->ar_hln != dev->addr_len ||
2764 skb->pkt_type == PACKET_OTHERHOST ||
2765 skb->pkt_type == PACKET_LOOPBACK ||
2766 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2767 arp->ar_pro != htons(ETH_P_IP) ||
2768 arp->ar_pln != 4)
2769 goto out_unlock;
2770
2771 arp_ptr = (unsigned char *)(arp + 1);
2772 arp_ptr += dev->addr_len;
2773 memcpy(&sip, arp_ptr, 4);
2774 arp_ptr += 4 + dev->addr_len;
2775 memcpy(&tip, arp_ptr, 4);
2776
5a03cdb7 2777 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
a4aee5c8
JP		 2778 bond->dev->name, slave->dev->name, slave->state,
2779 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2780 &sip, &tip);
f5b2b966
JV		 2781
2782 /*
2783 * Backup slaves won't see the ARP reply, but do come through
2784 * here for each ARP probe (so we swap the sip/tip to validate
2785 * the probe). In a "redundant switch, common router" type of
2786 * configuration, the ARP probe will (hopefully) travel from
2787 * the active, through one switch, the router, then the other
2788 * switch before reaching the backup.
2789 */
2790 if (slave->state == BOND_STATE_ACTIVE)
2791 bond_validate_arp(bond, slave, sip, tip);
2792 else
2793 bond_validate_arp(bond, slave, tip, sip);
2794
2795out_unlock:
2796 read_unlock(&bond->lock);
2797out:
2798 dev_kfree_skb(skb);
2799 return NET_RX_SUCCESS;
2800}
2801
1da177e4
LT		 2802/*
2803 * this function is called regularly to monitor each slave's link
2804 * ensuring that traffic is being sent and received when arp monitoring
2805 * is used in load-balancing mode. if the adapter has been dormant, then an
2806 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2807 * arp monitoring in active backup mode.
2808 */
1b76b316 2809void bond_loadbalance_arp_mon(struct work_struct *work)
1da177e4 2810{
1b76b316
JV		 2811 struct bonding *bond = container_of(work, struct bonding,
2812 arp_work.work);
1da177e4
LT		 2813 struct slave *slave, *oldcurrent;
2814 int do_failover = 0;
2815 int delta_in_ticks;
2816 int i;
2817
2818 read_lock(&bond->lock);
2819
5ce0da8f 2820 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 2821
3d632c3f 2822 if (bond->kill_timers)
1da177e4 2823 goto out;
1da177e4 2824
3d632c3f 2825 if (bond->slave_cnt == 0)
1da177e4 2826 goto re_arm;
1da177e4
LT		 2827
2828 read_lock(&bond->curr_slave_lock);
2829 oldcurrent = bond->curr_active_slave;
2830 read_unlock(&bond->curr_slave_lock);
2831
2832 /* see if any of the previous devices are up now (i.e. they have
2833 * xmt and rcv traffic). the curr_active_slave does not come into
2834 * the picture unless it is null. also, slave->jiffies is not needed
2835 * here because we send an arp on each slave and give a slave as
2836 * long as it needs to get the tx/rx within the delta.
2837 * TODO: what about up/down delay in arp mode? it wasn't here before
2838 * so it can wait
2839 */
2840 bond_for_each_slave(bond, slave, i) {
cb32f2a0
JB		 2841 unsigned long trans_start = dev_trans_start(slave->dev);
2842
1da177e4 2843 if (slave->link != BOND_LINK_UP) {
cb32f2a0
JB		 2844 if (time_in_range(jiffies,
2845 trans_start - delta_in_ticks,
2846 trans_start + delta_in_ticks) &&
2847 time_in_range(jiffies,
2848 slave->dev->last_rx - delta_in_ticks,
2849 slave->dev->last_rx + delta_in_ticks)) {
1da177e4
LT		 2850
2851 slave->link = BOND_LINK_UP;
2852 slave->state = BOND_STATE_ACTIVE;
2853
2854 /* primary_slave has no meaning in round-robin
2855 * mode. the window of a slave being up and
2856 * curr_active_slave being null after enslaving
2857 * is closed.
2858 */
2859 if (!oldcurrent) {
a4aee5c8
JP		 2860 pr_info("%s: link status definitely up for interface %s, ",
2861 bond->dev->name,
2862 slave->dev->name);
1da177e4
LT		 2863 do_failover = 1;
2864 } else {
a4aee5c8
JP		 2865 pr_info("%s: interface %s is now up\n",
2866 bond->dev->name,
2867 slave->dev->name);
1da177e4
LT		 2868 }
2869 }
2870 } else {
2871 /* slave->link == BOND_LINK_UP */
2872
2873 /* not all switches will respond to an arp request
2874 * when the source ip is 0, so don't take the link down
2875 * if we don't know our ip yet
2876 */
cb32f2a0
JB		 2877 if (!time_in_range(jiffies,
2878 trans_start - delta_in_ticks,
2879 trans_start + 2 * delta_in_ticks) ||
2880 !time_in_range(jiffies,
2881 slave->dev->last_rx - delta_in_ticks,
2882 slave->dev->last_rx + 2 * delta_in_ticks)) {
1da177e4
LT		 2883
2884 slave->link = BOND_LINK_DOWN;
2885 slave->state = BOND_STATE_BACKUP;
2886
3d632c3f 2887 if (slave->link_failure_count < UINT_MAX)
1da177e4 2888 slave->link_failure_count++;
1da177e4 2889
a4aee5c8
JP		 2890 pr_info("%s: interface %s is now down.\n",
2891 bond->dev->name,
2892 slave->dev->name);
1da177e4 2893
3d632c3f 2894 if (slave == oldcurrent)
1da177e4 2895 do_failover = 1;
1da177e4
LT		 2896 }
2897 }
2898
2899 /* note: if switch is in round-robin mode, all links
2900 * must tx arp to ensure all links rx an arp - otherwise
2901 * links may oscillate or not come up at all; if switch is
2902 * in something like xor mode, there is nothing we can
2903 * do - all replies will be rx'ed on same link causing slaves
2904 * to be unstable during low/no traffic periods
2905 */
3d632c3f 2906 if (IS_UP(slave->dev))
1da177e4 2907 bond_arp_send_all(bond, slave);
1da177e4
LT		 2908 }
2909
2910 if (do_failover) {
059fe7a5 2911 write_lock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2912
2913 bond_select_active_slave(bond);
2914
059fe7a5 2915 write_unlock_bh(&bond->curr_slave_lock);
1da177e4
LT		 2916 }
2917
2918re_arm:
1b76b316
JV		 2919 if (bond->params.arp_interval)
2920 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 2921out:
2922 read_unlock(&bond->lock);
2923}
2924
2925/*
b2220cad
JV		 2926 * Called to inspect slaves for active-backup mode ARP monitor link state
2927 * changes. Sets new_link in slaves to specify what action should take
2928 * place for the slave. Returns 0 if no changes are found, >0 if changes
2929 * to link states must be committed.
2930 *
2931 * Called with bond->lock held for read.
1da177e4 2932 */
b2220cad 2933static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
1da177e4 2934{
1da177e4 2935 struct slave *slave;
b2220cad 2936 int i, commit = 0;
cb32f2a0 2937 unsigned long trans_start;
1da177e4 2938
b2220cad
JV		 2939 bond_for_each_slave(bond, slave, i) {
2940 slave->new_link = BOND_LINK_NOCHANGE;
1da177e4 2941
b2220cad 2942 if (slave->link != BOND_LINK_UP) {
cb32f2a0
JB		 2943 if (time_in_range(jiffies,
2944 slave_last_rx(bond, slave) - delta_in_ticks,
2945 slave_last_rx(bond, slave) + delta_in_ticks)) {
2946
b2220cad
JV		 2947 slave->new_link = BOND_LINK_UP;
2948 commit++;
2949 }
1da177e4 2950
b2220cad
JV		 2951 continue;
2952 }
1da177e4 2953
b2220cad
JV		 2954 /*
2955 * Give slaves 2*delta after being enslaved or made
2956 * active. This avoids bouncing, as the last receive
2957 * times need a full ARP monitor cycle to be updated.
2958 */
cb32f2a0
JB		 2959 if (time_in_range(jiffies,
2960 slave->jiffies - delta_in_ticks,
2961 slave->jiffies + 2 * delta_in_ticks))
b2220cad
JV		 2962 continue;
2963
2964 /*
2965 * Backup slave is down if:
2966 * - No current_arp_slave AND
2967 * - more than 3*delta since last receive AND
2968 * - the bond has an IP address
2969 *
2970 * Note: a non-null current_arp_slave indicates
2971 * the curr_active_slave went down and we are
2972 * searching for a new one; under this condition
2973 * we only take the curr_active_slave down - this
2974 * gives each slave a chance to tx/rx traffic
2975 * before being taken out
2976 */
2977 if (slave->state == BOND_STATE_BACKUP &&
2978 !bond->current_arp_slave &&
cb32f2a0
JB		 2979 !time_in_range(jiffies,
2980 slave_last_rx(bond, slave) - delta_in_ticks,
2981 slave_last_rx(bond, slave) + 3 * delta_in_ticks)) {
2982
b2220cad
JV		 2983 slave->new_link = BOND_LINK_DOWN;
2984 commit++;
2985 }
2986
2987 /*
2988 * Active slave is down if:
2989 * - more than 2*delta since transmitting OR
2990 * - (more than 2*delta since receive AND
2991 * the bond has an IP address)
2992 */
cb32f2a0 2993 trans_start = dev_trans_start(slave->dev);
b2220cad 2994 if ((slave->state == BOND_STATE_ACTIVE) &&
cb32f2a0
JB		 2995 (!time_in_range(jiffies,
2996 trans_start - delta_in_ticks,
2997 trans_start + 2 * delta_in_ticks) ||
2998 !time_in_range(jiffies,
2999 slave_last_rx(bond, slave) - delta_in_ticks,
3000 slave_last_rx(bond, slave) + 2 * delta_in_ticks))) {
3001
b2220cad
JV		 3002 slave->new_link = BOND_LINK_DOWN;
3003 commit++;
3004 }
1da177e4
LT		 3005 }
3006
b2220cad
JV		 3007 return commit;
3008}
1da177e4 3009
b2220cad
JV		 3010/*
3011 * Called to commit link state changes noted by inspection step of
3012 * active-backup mode ARP monitor.
3013 *
3014 * Called with RTNL and bond->lock for read.
3015 */
3016static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
3017{
3018 struct slave *slave;
3019 int i;
cb32f2a0 3020 unsigned long trans_start;
1da177e4 3021
b2220cad
JV		 3022 bond_for_each_slave(bond, slave, i) {
3023 switch (slave->new_link) {
3024 case BOND_LINK_NOCHANGE:
3025 continue;
ff59c456 3026
b2220cad 3027 case BOND_LINK_UP:
cb32f2a0 3028 trans_start = dev_trans_start(slave->dev);
b9f60253 3029 if ((!bond->curr_active_slave &&
cb32f2a0
JB		 3030 time_in_range(jiffies,
3031 trans_start - delta_in_ticks,
3032 trans_start + delta_in_ticks)) ||
b9f60253 3033 bond->curr_active_slave != slave) {
b2220cad 3034 slave->link = BOND_LINK_UP;
b2220cad
JV		 3035 bond->current_arp_slave = NULL;
3036
a4aee5c8 3037 pr_info("%s: link status definitely up for interface %s.\n",
b9f60253 3038 bond->dev->name, slave->dev->name);
b2220cad 3039
b9f60253
JP		 3040 if (!bond->curr_active_slave ||
3041 (slave == bond->primary_slave))
3042 goto do_failover;
1da177e4 3043
b9f60253 3044 }
1da177e4 3045
b9f60253 3046 continue;
1da177e4 3047
b2220cad
JV		 3048 case BOND_LINK_DOWN:
3049 if (slave->link_failure_count < UINT_MAX)
3050 slave->link_failure_count++;
3051
3052 slave->link = BOND_LINK_DOWN;
b9f60253 3053 bond_set_slave_inactive_flags(slave);
b2220cad 3054
a4aee5c8 3055 pr_info("%s: link status definitely down for interface %s, disabling it\n",
b9f60253 3056 bond->dev->name, slave->dev->name);
b2220cad 3057
b9f60253 3058 if (slave == bond->curr_active_slave) {
b2220cad 3059 bond->current_arp_slave = NULL;
b9f60253 3060 goto do_failover;
1da177e4 3061 }
b9f60253
JP		 3062
3063 continue;
b2220cad
JV		 3064
3065 default:
a4aee5c8 3066 pr_err("%s: impossible: new_link %d on slave %s\n",
b2220cad
JV		 3067 bond->dev->name, slave->new_link,
3068 slave->dev->name);
b9f60253 3069 continue;
1da177e4 3070 }
1da177e4 3071
b9f60253
JP		 3072do_failover:
3073 ASSERT_RTNL();
b2220cad 3074 write_lock_bh(&bond->curr_slave_lock);
b9f60253 3075 bond_select_active_slave(bond);
b2220cad
JV		 3076 write_unlock_bh(&bond->curr_slave_lock);
3077 }
1da177e4 3078
b2220cad
JV		 3079 bond_set_carrier(bond);
3080}
1da177e4 3081
b2220cad
JV		 3082/*
3083 * Send ARP probes for active-backup mode ARP monitor.
3084 *
3085 * Called with bond->lock held for read.
3086 */
3087static void bond_ab_arp_probe(struct bonding *bond)
3088{
3089 struct slave *slave;
3090 int i;
1da177e4 3091
b2220cad 3092 read_lock(&bond->curr_slave_lock);
1da177e4 3093
b2220cad 3094 if (bond->current_arp_slave && bond->curr_active_slave)
a4aee5c8
JP		 3095 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3096 bond->current_arp_slave->dev->name,
3097 bond->curr_active_slave->dev->name);
1da177e4 3098
b2220cad
JV		 3099 if (bond->curr_active_slave) {
3100 bond_arp_send_all(bond, bond->curr_active_slave);
3101 read_unlock(&bond->curr_slave_lock);
3102 return;
3103 }
1da177e4 3104
b2220cad 3105 read_unlock(&bond->curr_slave_lock);
059fe7a5 3106
b2220cad
JV		 3107 /* if we don't have a curr_active_slave, search for the next available
3108 * backup slave from the current_arp_slave and make it the candidate
3109 * for becoming the curr_active_slave
3110 */
1da177e4 3111
b2220cad
JV		 3112 if (!bond->current_arp_slave) {
3113 bond->current_arp_slave = bond->first_slave;
3114 if (!bond->current_arp_slave)
3115 return;
3116 }
1da177e4 3117
b2220cad 3118 bond_set_slave_inactive_flags(bond->current_arp_slave);
059fe7a5 3119
b2220cad
JV		 3120 /* search for next candidate */
3121 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3122 if (IS_UP(slave->dev)) {
3123 slave->link = BOND_LINK_BACK;
3124 bond_set_slave_active_flags(slave);
3125 bond_arp_send_all(bond, slave);
1da177e4 3126 slave->jiffies = jiffies;
b2220cad
JV		 3127 bond->current_arp_slave = slave;
3128 break;
1da177e4
LT		 3129 }
3130
b2220cad
JV		 3131 /* if the link state is up at this point, we
3132 * mark it down - this can happen if we have
3133 * simultaneous link failures and
3134 * reselect_active_interface doesn't make this
3135 * one the current slave so it is still marked
3136 * up when it is actually down
1da177e4 3137 */
b2220cad
JV		 3138 if (slave->link == BOND_LINK_UP) {
3139 slave->link = BOND_LINK_DOWN;
3140 if (slave->link_failure_count < UINT_MAX)
3141 slave->link_failure_count++;
1da177e4 3142
b2220cad
JV		 3143 bond_set_slave_inactive_flags(slave);
3144
a4aee5c8
JP		 3145 pr_info("%s: backup interface %s is now down.\n",
3146 bond->dev->name, slave->dev->name);
1da177e4 3147 }
b2220cad
JV		 3148 }
3149}
1da177e4 3150
b2220cad
JV		 3151void bond_activebackup_arp_mon(struct work_struct *work)
3152{
3153 struct bonding *bond = container_of(work, struct bonding,
3154 arp_work.work);
3155 int delta_in_ticks;
1da177e4 3156
b2220cad 3157 read_lock(&bond->lock);
1da177e4 3158
b2220cad
JV		 3159 if (bond->kill_timers)
3160 goto out;
1da177e4 3161
b2220cad 3162 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
1da177e4 3163
b2220cad
JV		 3164 if (bond->slave_cnt == 0)
3165 goto re_arm;
3166
b59f9f74
JV		 3167 if (bond->send_grat_arp) {
3168 read_lock(&bond->curr_slave_lock);
3169 bond_send_gratuitous_arp(bond);
3170 read_unlock(&bond->curr_slave_lock);
3171 }
3172
305d552a
BH		 3173 if (bond->send_unsol_na) {
3174 read_lock(&bond->curr_slave_lock);
3175 bond_send_unsolicited_na(bond);
3176 read_unlock(&bond->curr_slave_lock);
3177 }
3178
b2220cad
JV		 3179 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3180 read_unlock(&bond->lock);
3181 rtnl_lock();
3182 read_lock(&bond->lock);
3183
3184 bond_ab_arp_commit(bond, delta_in_ticks);
3185
3186 read_unlock(&bond->lock);
3187 rtnl_unlock();
3188 read_lock(&bond->lock);
1da177e4
LT		 3189 }
3190
b2220cad
JV		 3191 bond_ab_arp_probe(bond);
3192
1da177e4 3193re_arm:
3d632c3f 3194 if (bond->params.arp_interval)
1b76b316 3195 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
1da177e4
LT		 3196out:
3197 read_unlock(&bond->lock);
3198}
3199
3200/*------------------------------ proc/seq_file-------------------------------*/
3201
3202#ifdef CONFIG_PROC_FS
3203
1da177e4 3204static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
1f78d9f9
HE		 3205 __acquires(&dev_base_lock)
3206 __acquires(&bond->lock)
1da177e4
LT		 3207{
3208 struct bonding *bond = seq->private;
3209 loff_t off = 0;
3210 struct slave *slave;
3211 int i;
3212
3213 /* make sure the bond won't be taken away */
3214 read_lock(&dev_base_lock);
6603a6f2 3215 read_lock(&bond->lock);
1da177e4 3216
3d632c3f 3217 if (*pos == 0)
1da177e4 3218 return SEQ_START_TOKEN;
1da177e4
LT		 3219
3220 bond_for_each_slave(bond, slave, i) {
3d632c3f 3221 if (++off == *pos)
1da177e4 3222 return slave;
1da177e4
LT		 3223 }
3224
3225 return NULL;
3226}
3227
3228static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3229{
3230 struct bonding *bond = seq->private;
3231 struct slave *slave = v;
3232
3233 ++*pos;
3d632c3f 3234 if (v == SEQ_START_TOKEN)
1da177e4 3235 return bond->first_slave;
1da177e4
LT		 3236
3237 slave = slave->next;
3238
3239 return (slave == bond->first_slave) ? NULL : slave;
3240}
3241
3242static void bond_info_seq_stop(struct seq_file *seq, void *v)
1f78d9f9
HE		 3243 __releases(&bond->lock)
3244 __releases(&dev_base_lock)
1da177e4
LT		 3245{
3246 struct bonding *bond = seq->private;
3247
6603a6f2 3248 read_unlock(&bond->lock);
1da177e4
LT		 3249 read_unlock(&dev_base_lock);
3250}
3251
3252static void bond_info_show_master(struct seq_file *seq)
3253{
3254 struct bonding *bond = seq->private;
3255 struct slave *curr;
4756b02f 3256 int i;
1da177e4
LT		 3257
3258 read_lock(&bond->curr_slave_lock);
3259 curr = bond->curr_active_slave;
3260 read_unlock(&bond->curr_slave_lock);
3261
dd957c57 3262 seq_printf(seq, "Bonding Mode: %s",
1da177e4
LT		 3263 bond_mode_name(bond->params.mode));
3264
dd957c57
JV		 3265 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3266 bond->params.fail_over_mac)
3915c1e8
JV		 3267 seq_printf(seq, " (fail_over_mac %s)",
3268 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
dd957c57
JV		 3269
3270 seq_printf(seq, "\n");
3271
c61b75ad
MW		 3272 if (bond->params.mode == BOND_MODE_XOR ||
3273 bond->params.mode == BOND_MODE_8023AD) {
3274 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3275 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3276 bond->params.xmit_policy);
3277 }
3278
1da177e4 3279 if (USES_PRIMARY(bond->params.mode)) {
a549952a 3280 seq_printf(seq, "Primary Slave: %s",
0f418b2a
MW		 3281 (bond->primary_slave) ?
3282 bond->primary_slave->dev->name : "None");
a549952a
JP		 3283 if (bond->primary_slave)
3284 seq_printf(seq, " (primary_reselect %s)",
3285 pri_reselect_tbl[bond->params.primary_reselect].modename);
1da177e4 3286
a549952a 3287 seq_printf(seq, "\nCurrently Active Slave: %s\n",
1da177e4
LT		 3288 (curr) ? curr->dev->name : "None");
3289 }
3290
ff59c456
JV		 3291 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3292 "up" : "down");
1da177e4
LT		 3293 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3294 seq_printf(seq, "Up Delay (ms): %d\n",
3295 bond->params.updelay * bond->params.miimon);
3296 seq_printf(seq, "Down Delay (ms): %d\n",
3297 bond->params.downdelay * bond->params.miimon);
3298
4756b02f
MW		 3299
3300 /* ARP information */
3d632c3f
SH		 3301 if (bond->params.arp_interval > 0) {
3302 int printed = 0;
4756b02f
MW		 3303 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3304 bond->params.arp_interval);
3305
3306 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3307
3d632c3f 3308 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
4756b02f 3309 if (!bond->params.arp_targets[i])
5a31bec0 3310 break;
4756b02f
MW		 3311 if (printed)
3312 seq_printf(seq, ",");
8cf14e38 3313 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
4756b02f
MW		 3314 printed = 1;
3315 }
3316 seq_printf(seq, "\n");
3317 }
3318
1da177e4
LT		 3319 if (bond->params.mode == BOND_MODE_8023AD) {
3320 struct ad_info ad_info;
3321
3322 seq_puts(seq, "\n802.3ad info\n");
3323 seq_printf(seq, "LACP rate: %s\n",
3324 (bond->params.lacp_fast) ? "fast" : "slow");
fd989c83
JV		 3325 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3326 ad_select_tbl[bond->params.ad_select].modename);
1da177e4
LT		 3327
3328 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3329 seq_printf(seq, "bond %s has no active aggregator\n",
3330 bond->dev->name);
3331 } else {
3332 seq_printf(seq, "Active Aggregator Info:\n");
3333
3334 seq_printf(seq, "\tAggregator ID: %d\n",
3335 ad_info.aggregator_id);
3336 seq_printf(seq, "\tNumber of ports: %d\n",
3337 ad_info.ports);
3338 seq_printf(seq, "\tActor Key: %d\n",
3339 ad_info.actor_key);
3340 seq_printf(seq, "\tPartner Key: %d\n",
3341 ad_info.partner_key);
e174961c
JB		 3342 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3343 ad_info.partner_system);
1da177e4
LT		 3344 }
3345 }
3346}
3347
3d632c3f
SH		 3348static void bond_info_show_slave(struct seq_file *seq,
3349 const struct slave *slave)
1da177e4
LT		 3350{
3351 struct bonding *bond = seq->private;
3352
3353 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3354 seq_printf(seq, "MII Status: %s\n",
3355 (slave->link == BOND_LINK_UP) ? "up" : "down");
65509645 3356 seq_printf(seq, "Link Failure Count: %u\n",
1da177e4
LT		 3357 slave->link_failure_count);
3358
e174961c 3359 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
1da177e4
LT		 3360
3361 if (bond->params.mode == BOND_MODE_8023AD) {
3362 const struct aggregator *agg
3363 = SLAVE_AD_INFO(slave).port.aggregator;
3364
3d632c3f 3365 if (agg)
1da177e4
LT		 3366 seq_printf(seq, "Aggregator ID: %d\n",
3367 agg->aggregator_identifier);
3d632c3f 3368 else
1da177e4 3369 seq_puts(seq, "Aggregator ID: N/A\n");
1da177e4 3370 }
bb1d9123 3371 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
1da177e4
LT		 3372}
3373
3374static int bond_info_seq_show(struct seq_file *seq, void *v)
3375{
3376 if (v == SEQ_START_TOKEN) {
3377 seq_printf(seq, "%s\n", version);
3378 bond_info_show_master(seq);
3d632c3f 3379 } else
1da177e4 3380 bond_info_show_slave(seq, v);
1da177e4
LT		 3381
3382 return 0;
3383}
3384
4101dec9 3385static const struct seq_operations bond_info_seq_ops = {
1da177e4
LT		 3386 .start = bond_info_seq_start,
3387 .next = bond_info_seq_next,
3388 .stop = bond_info_seq_stop,
3389 .show = bond_info_seq_show,
3390};
3391
3392static int bond_info_open(struct inode *inode, struct file *file)
3393{
3394 struct seq_file *seq;
3395 struct proc_dir_entry *proc;
3396 int res;
3397
3398 res = seq_open(file, &bond_info_seq_ops);
3399 if (!res) {
3400 /* recover the pointer buried in proc_dir_entry data */
3401 seq = file->private_data;
3402 proc = PDE(inode);
3403 seq->private = proc->data;
3404 }
3405
3406 return res;
3407}
3408
d54b1fdb 3409static const struct file_operations bond_info_fops = {
1da177e4
LT		 3410 .owner = THIS_MODULE,
3411 .open = bond_info_open,
3412 .read = seq_read,
3413 .llseek = seq_lseek,
3414 .release = seq_release,
3415};
3416
38fc0026 3417static void bond_create_proc_entry(struct bonding *bond)
1da177e4
LT		 3418{
3419 struct net_device *bond_dev = bond->dev;
ec87fd3b 3420 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
1da177e4 3421
ec87fd3b 3422 if (bn->proc_dir) {
a95609cb 3423 bond->proc_entry = proc_create_data(bond_dev->name,
ec87fd3b 3424 S_IRUGO, bn->proc_dir,
a95609cb 3425 &bond_info_fops, bond);
3d632c3f 3426 if (bond->proc_entry == NULL)
a4aee5c8
JP		 3427 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3428 DRV_NAME, bond_dev->name);
3d632c3f 3429 else
1da177e4 3430 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
1da177e4 3431 }
1da177e4
LT		 3432}
3433
3434static void bond_remove_proc_entry(struct bonding *bond)
3435{
ec87fd3b
EB		 3436 struct net_device *bond_dev = bond->dev;
3437 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3438
3439 if (bn->proc_dir && bond->proc_entry) {
3440 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
1da177e4
LT		 3441 memset(bond->proc_file_name, 0, IFNAMSIZ);
3442 bond->proc_entry = NULL;
3443 }
3444}
3445
3446/* Create the bonding directory under /proc/net, if doesn't exist yet.
3447 * Caller must hold rtnl_lock.
3448 */
2c8c1e72 3449static void __net_init bond_create_proc_dir(struct bond_net *bn)
1da177e4 3450{
ec87fd3b
EB		 3451 if (!bn->proc_dir) {
3452 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
3453 if (!bn->proc_dir)
a4aee5c8
JP		 3454 pr_warning("Warning: cannot create /proc/net/%s\n",
3455 DRV_NAME);
1da177e4
LT		 3456 }
3457}
3458
3459/* Destroy the bonding directory under /proc/net, if empty.
3460 * Caller must hold rtnl_lock.
3461 */
2c8c1e72 3462static void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
1da177e4 3463{
ec87fd3b
EB		 3464 if (bn->proc_dir) {
3465 remove_proc_entry(DRV_NAME, bn->net->proc_net);
3466 bn->proc_dir = NULL;
1da177e4
LT		 3467 }
3468}
aee64faf
JP		 3469
3470#else /* !CONFIG_PROC_FS */
3471
38fc0026 3472static void bond_create_proc_entry(struct bonding *bond)
aee64faf
JP		 3473{
3474}
3475
3476static void bond_remove_proc_entry(struct bonding *bond)
3477{
3478}
3479
2c8c1e72 3480static inline void bond_create_proc_dir(struct bond_net *bn)
aee64faf
JP		 3481{
3482}
3483
2c8c1e72 3484static inline void bond_destroy_proc_dir(struct bond_net *bn)
aee64faf
JP		 3485{
3486}
3487
1da177e4
LT		 3488#endif /* CONFIG_PROC_FS */
3489
aee64faf 3490
1da177e4
LT		 3491/*-------------------------- netdev event handling --------------------------*/
3492
3493/*
3494 * Change device name
3495 */
3496static int bond_event_changename(struct bonding *bond)
3497{
1da177e4
LT		 3498 bond_remove_proc_entry(bond);
3499 bond_create_proc_entry(bond);
7e083840 3500
1da177e4
LT		 3501 return NOTIFY_DONE;
3502}
3503
3d632c3f
SH		 3504static int bond_master_netdev_event(unsigned long event,
3505 struct net_device *bond_dev)
1da177e4 3506{
454d7c9b 3507 struct bonding *event_bond = netdev_priv(bond_dev);
1da177e4
LT		 3508
3509 switch (event) {
3510 case NETDEV_CHANGENAME:
3511 return bond_event_changename(event_bond);
1da177e4
LT		 3512 default:
3513 break;
3514 }
3515
3516 return NOTIFY_DONE;
3517}
3518
3d632c3f
SH		 3519static int bond_slave_netdev_event(unsigned long event,
3520 struct net_device *slave_dev)
1da177e4
LT		 3521{
3522 struct net_device *bond_dev = slave_dev->master;
454d7c9b 3523 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3524
3525 switch (event) {
3526 case NETDEV_UNREGISTER:
3527 if (bond_dev) {
1284cd3a
JV		 3528 if (bond->setup_by_slave)
3529 bond_release_and_destroy(bond_dev, slave_dev);
3530 else
3531 bond_release(bond_dev, slave_dev);
1da177e4
LT		 3532 }
3533 break;
3534 case NETDEV_CHANGE:
17d04500
JV		 3535 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3536 struct slave *slave;
3537
3538 slave = bond_get_slave_by_dev(bond, slave_dev);
3539 if (slave) {
3540 u16 old_speed = slave->speed;
3541 u16 old_duplex = slave->duplex;
3542
3543 bond_update_speed_duplex(slave);
3544
3545 if (bond_is_lb(bond))
3546 break;
3547
3548 if (old_speed != slave->speed)
3549 bond_3ad_adapter_speed_changed(slave);
3550 if (old_duplex != slave->duplex)
3551 bond_3ad_adapter_duplex_changed(slave);
3552 }
3553 }
3554
1da177e4
LT		 3555 break;
3556 case NETDEV_DOWN:
3557 /*
3558 * ... Or is it this?
3559 */
3560 break;
3561 case NETDEV_CHANGEMTU:
3562 /*
3563 * TODO: Should slaves be allowed to
3564 * independently alter their MTU? For
3565 * an active-backup bond, slaves need
3566 * not be the same type of device, so
3567 * MTUs may vary. For other modes,
3568 * slaves arguably should have the
3569 * same MTUs. To do this, we'd need to
3570 * take over the slave's change_mtu
3571 * function for the duration of their
3572 * servitude.
3573 */
3574 break;
3575 case NETDEV_CHANGENAME:
3576 /*
3577 * TODO: handle changing the primary's name
3578 */
3579 break;
8531c5ff
AK		 3580 case NETDEV_FEAT_CHANGE:
3581 bond_compute_features(bond);
3582 break;
1da177e4
LT		 3583 default:
3584 break;
3585 }
3586
3587 return NOTIFY_DONE;
3588}
3589
3590/*
3591 * bond_netdev_event: handle netdev notifier chain events.
3592 *
3593 * This function receives events for the netdev chain. The caller (an
e041c683 3594 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
1da177e4
LT		 3595 * locks for us to safely manipulate the slave devices (RTNL lock,
3596 * dev_probe_lock).
3597 */
3d632c3f
SH		 3598static int bond_netdev_event(struct notifier_block *this,
3599 unsigned long event, void *ptr)
1da177e4
LT		 3600{
3601 struct net_device *event_dev = (struct net_device *)ptr;
3602
5a03cdb7 3603 pr_debug("event_dev: %s, event: %lx\n",
a4aee5c8
JP		 3604 event_dev ? event_dev->name : "None",
3605 event);
1da177e4 3606
0b680e75
JV		 3607 if (!(event_dev->priv_flags & IFF_BONDING))
3608 return NOTIFY_DONE;
3609
1da177e4 3610 if (event_dev->flags & IFF_MASTER) {
5a03cdb7 3611 pr_debug("IFF_MASTER\n");
1da177e4
LT		 3612 return bond_master_netdev_event(event, event_dev);
3613 }
3614
3615 if (event_dev->flags & IFF_SLAVE) {
5a03cdb7 3616 pr_debug("IFF_SLAVE\n");
1da177e4
LT		 3617 return bond_slave_netdev_event(event, event_dev);
3618 }
3619
3620 return NOTIFY_DONE;
3621}
3622
c3ade5ca
JV		 3623/*
3624 * bond_inetaddr_event: handle inetaddr notifier chain events.
3625 *
3626 * We keep track of device IPs primarily to use as source addresses in
3627 * ARP monitor probes (rather than spewing out broadcasts all the time).
3628 *
3629 * We track one IP for the main device (if it has one), plus one per VLAN.
3630 */
3631static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3632{
3633 struct in_ifaddr *ifa = ptr;
3634 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
ec87fd3b 3635 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
0883beca
PE		 3636 struct bonding *bond;
3637 struct vlan_entry *vlan;
c3ade5ca 3638
ec87fd3b 3639 list_for_each_entry(bond, &bn->dev_list, bond_list) {
c3ade5ca
JV		 3640 if (bond->dev == event_dev) {
3641 switch (event) {
3642 case NETDEV_UP:
3643 bond->master_ip = ifa->ifa_local;
3644 return NOTIFY_OK;
3645 case NETDEV_DOWN:
3646 bond->master_ip = bond_glean_dev_ip(bond->dev);
3647 return NOTIFY_OK;
3648 default:
3649 return NOTIFY_DONE;
3650 }
3651 }
3652
0883beca 3653 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
f35188fa
JV		 3654 if (!bond->vlgrp)
3655 continue;
5c15bdec 3656 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
c3ade5ca
JV		 3657 if (vlan_dev == event_dev) {
3658 switch (event) {
3659 case NETDEV_UP:
3660 vlan->vlan_ip = ifa->ifa_local;
3661 return NOTIFY_OK;
3662 case NETDEV_DOWN:
3663 vlan->vlan_ip =
3664 bond_glean_dev_ip(vlan_dev);
3665 return NOTIFY_OK;
3666 default:
3667 return NOTIFY_DONE;
3668 }
3669 }
3670 }
3671 }
3672 return NOTIFY_DONE;
3673}
3674
1da177e4
LT		 3675static struct notifier_block bond_netdev_notifier = {
3676 .notifier_call = bond_netdev_event,
3677};
3678
c3ade5ca
JV		 3679static struct notifier_block bond_inetaddr_notifier = {
3680 .notifier_call = bond_inetaddr_event,
3681};
3682
1da177e4
LT		 3683/*-------------------------- Packet type handling ---------------------------*/
3684
3685/* register to receive lacpdus on a bond */
3686static void bond_register_lacpdu(struct bonding *bond)
3687{
3688 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3689
3690 /* initialize packet type */
3691 pk_type->type = PKT_TYPE_LACPDU;
3692 pk_type->dev = bond->dev;
3693 pk_type->func = bond_3ad_lacpdu_recv;
3694
3695 dev_add_pack(pk_type);
3696}
3697
3698/* unregister to receive lacpdus on a bond */
3699static void bond_unregister_lacpdu(struct bonding *bond)
3700{
3701 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3702}
3703
f5b2b966
JV		 3704void bond_register_arp(struct bonding *bond)
3705{
3706 struct packet_type *pt = &bond->arp_mon_pt;
3707
c4f283b1
JV		 3708 if (pt->type)
3709 return;
3710
f5b2b966 3711 pt->type = htons(ETH_P_ARP);
e245cb71 3712 pt->dev = bond->dev;
f5b2b966
JV		 3713 pt->func = bond_arp_rcv;
3714 dev_add_pack(pt);
3715}
3716
3717void bond_unregister_arp(struct bonding *bond)
3718{
c4f283b1
JV		 3719 struct packet_type *pt = &bond->arp_mon_pt;
3720
3721 dev_remove_pack(pt);
3722 pt->type = 0;
f5b2b966
JV		 3723}
3724
169a3e66
JV		 3725/*---------------------------- Hashing Policies -----------------------------*/
3726
6f6652be
JV		 3727/*
3728 * Hash for the output device based upon layer 2 and layer 3 data. If
3729 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3730 */
a361c83c 3731static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
6f6652be
JV		 3732{
3733 struct ethhdr *data = (struct ethhdr *)skb->data;
3734 struct iphdr *iph = ip_hdr(skb);
3735
f14c4e4e 3736 if (skb->protocol == htons(ETH_P_IP)) {
6f6652be 3737 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
d3da6831 3738 (data->h_dest[5] ^ data->h_source[5])) % count;
6f6652be
JV		 3739 }
3740
d3da6831 3741 return (data->h_dest[5] ^ data->h_source[5]) % count;
6f6652be
JV		 3742}
3743
169a3e66 3744/*
59c51591 3745 * Hash for the output device based upon layer 3 and layer 4 data. If
169a3e66
JV		 3746 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3747 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3748 */
a361c83c 3749static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
169a3e66
JV		 3750{
3751 struct ethhdr *data = (struct ethhdr *)skb->data;
eddc9ec5 3752 struct iphdr *iph = ip_hdr(skb);
d3bb52b0 3753 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
169a3e66
JV		 3754 int layer4_xor = 0;
3755
f14c4e4e
BH		 3756 if (skb->protocol == htons(ETH_P_IP)) {
3757 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
169a3e66
JV		 3758 (iph->protocol == IPPROTO_TCP ||
3759 iph->protocol == IPPROTO_UDP)) {
d3bb52b0 3760 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
169a3e66
JV		 3761 }
3762 return (layer4_xor ^
3763 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3764
3765 }
3766
d3da6831 3767 return (data->h_dest[5] ^ data->h_source[5]) % count;
169a3e66
JV		 3768}
3769
3770/*
3771 * Hash for the output device based upon layer 2 data
3772 */
a361c83c 3773static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
169a3e66
JV		 3774{
3775 struct ethhdr *data = (struct ethhdr *)skb->data;
3776
d3da6831 3777 return (data->h_dest[5] ^ data->h_source[5]) % count;
169a3e66
JV		 3778}
3779
1da177e4
LT		 3780/*-------------------------- Device entry points ----------------------------*/
3781
3782static int bond_open(struct net_device *bond_dev)
3783{
454d7c9b 3784 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3785
3786 bond->kill_timers = 0;
3787
5a37e8ca
FL		 3788 INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed);
3789
58402054 3790 if (bond_is_lb(bond)) {
1da177e4
LT		 3791 /* bond_alb_initialize must be called before the timer
3792 * is started.
3793 */
3794 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3795 /* something went wrong - fail the open operation */
b473946a 3796 return -ENOMEM;
1da177e4
LT		 3797 }
3798
1b76b316
JV		 3799 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3800 queue_delayed_work(bond->wq, &bond->alb_work, 0);
1da177e4
LT		 3801 }
3802
3803 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316
JV		 3804 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3805 queue_delayed_work(bond->wq, &bond->mii_work, 0);
1da177e4
LT		 3806 }
3807
3808 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316
JV		 3809 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3810 INIT_DELAYED_WORK(&bond->arp_work,
3811 bond_activebackup_arp_mon);
3812 else
3813 INIT_DELAYED_WORK(&bond->arp_work,
3814 bond_loadbalance_arp_mon);
3815
3816 queue_delayed_work(bond->wq, &bond->arp_work, 0);
f5b2b966
JV		 3817 if (bond->params.arp_validate)
3818 bond_register_arp(bond);
1da177e4
LT		 3819 }
3820
3821 if (bond->params.mode == BOND_MODE_8023AD) {
a40745f5 3822 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
1b76b316 3823 queue_delayed_work(bond->wq, &bond->ad_work, 0);
1da177e4
LT		 3824 /* register to receive LACPDUs */
3825 bond_register_lacpdu(bond);
fd989c83 3826 bond_3ad_initiate_agg_selection(bond, 1);
1da177e4
LT		 3827 }
3828
3829 return 0;
3830}
3831
3832static int bond_close(struct net_device *bond_dev)
3833{
454d7c9b 3834 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 3835
3836 if (bond->params.mode == BOND_MODE_8023AD) {
3837 /* Unregister the receive of LACPDUs */
3838 bond_unregister_lacpdu(bond);
3839 }
3840
f5b2b966
JV		 3841 if (bond->params.arp_validate)
3842 bond_unregister_arp(bond);
3843
1da177e4
LT		 3844 write_lock_bh(&bond->lock);
3845
b59f9f74 3846 bond->send_grat_arp = 0;
305d552a 3847 bond->send_unsol_na = 0;
1da177e4
LT		 3848
3849 /* signal timers not to re-arm */
3850 bond->kill_timers = 1;
3851
3852 write_unlock_bh(&bond->lock);
3853
1da177e4 3854 if (bond->params.miimon) { /* link check interval, in milliseconds. */
1b76b316 3855 cancel_delayed_work(&bond->mii_work);
1da177e4
LT		 3856 }
3857
3858 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
1b76b316 3859 cancel_delayed_work(&bond->arp_work);
1da177e4
LT		 3860 }
3861
3862 switch (bond->params.mode) {
3863 case BOND_MODE_8023AD:
1b76b316 3864 cancel_delayed_work(&bond->ad_work);
1da177e4
LT		 3865 break;
3866 case BOND_MODE_TLB:
3867 case BOND_MODE_ALB:
1b76b316 3868 cancel_delayed_work(&bond->alb_work);
1da177e4
LT		 3869 break;
3870 default:
3871 break;
3872 }
3873
5a37e8ca
FL		 3874 if (delayed_work_pending(&bond->mcast_work))
3875 cancel_delayed_work(&bond->mcast_work);
1da177e4 3876
58402054 3877 if (bond_is_lb(bond)) {
1da177e4
LT		 3878 /* Must be called only after all
3879 * slaves have been released
3880 */
3881 bond_alb_deinitialize(bond);
3882 }
3883
3884 return 0;
3885}
3886
28172739
ED		 3887static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3888 struct rtnl_link_stats64 *stats)
1da177e4 3889{
454d7c9b 3890 struct bonding *bond = netdev_priv(bond_dev);
28172739 3891 struct rtnl_link_stats64 temp;
1da177e4
LT		 3892 struct slave *slave;
3893 int i;
3894
28172739 3895 memset(stats, 0, sizeof(*stats));
1da177e4
LT		 3896
3897 read_lock_bh(&bond->lock);
3898
3899 bond_for_each_slave(bond, slave, i) {
be1f3c2c 3900 const struct rtnl_link_stats64 *sstats =
28172739
ED		 3901 dev_get_stats(slave->dev, &temp);
3902
3903 stats->rx_packets += sstats->rx_packets;
3904 stats->rx_bytes += sstats->rx_bytes;
3905 stats->rx_errors += sstats->rx_errors;
3906 stats->rx_dropped += sstats->rx_dropped;
3907
3908 stats->tx_packets += sstats->tx_packets;
3909 stats->tx_bytes += sstats->tx_bytes;
3910 stats->tx_errors += sstats->tx_errors;
3911 stats->tx_dropped += sstats->tx_dropped;
3912
3913 stats->multicast += sstats->multicast;
3914 stats->collisions += sstats->collisions;
3915
3916 stats->rx_length_errors += sstats->rx_length_errors;
3917 stats->rx_over_errors += sstats->rx_over_errors;
3918 stats->rx_crc_errors += sstats->rx_crc_errors;
3919 stats->rx_frame_errors += sstats->rx_frame_errors;
3920 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3921 stats->rx_missed_errors += sstats->rx_missed_errors;
3922
3923 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3924 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3925 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3926 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3927 stats->tx_window_errors += sstats->tx_window_errors;
2439f9eb
AG		 3928 }
3929
1da177e4
LT		 3930 read_unlock_bh(&bond->lock);
3931
3932 return stats;
3933}
3934
3935static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3936{
3937 struct net_device *slave_dev = NULL;
3938 struct ifbond k_binfo;
3939 struct ifbond __user *u_binfo = NULL;
3940 struct ifslave k_sinfo;
3941 struct ifslave __user *u_sinfo = NULL;
3942 struct mii_ioctl_data *mii = NULL;
1da177e4
LT		 3943 int res = 0;
3944
a4aee5c8 3945 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
1da177e4
LT		 3946
3947 switch (cmd) {
1da177e4
LT		 3948 case SIOCGMIIPHY:
3949 mii = if_mii(ifr);
3d632c3f 3950 if (!mii)
1da177e4 3951 return -EINVAL;
3d632c3f 3952
1da177e4
LT		 3953 mii->phy_id = 0;
3954 /* Fall Through */
3955 case SIOCGMIIREG:
3956 /*
3957 * We do this again just in case we were called by SIOCGMIIREG
3958 * instead of SIOCGMIIPHY.
3959 */
3960 mii = if_mii(ifr);
3d632c3f 3961 if (!mii)
1da177e4 3962 return -EINVAL;
3d632c3f 3963
1da177e4
LT		 3964
3965 if (mii->reg_num == 1) {
454d7c9b 3966 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 3967 mii->val_out = 0;
6603a6f2 3968 read_lock(&bond->lock);
1da177e4 3969 read_lock(&bond->curr_slave_lock);
3d632c3f 3970 if (netif_carrier_ok(bond->dev))
1da177e4 3971 mii->val_out = BMSR_LSTATUS;
3d632c3f 3972
1da177e4 3973 read_unlock(&bond->curr_slave_lock);
6603a6f2 3974 read_unlock(&bond->lock);
1da177e4
LT		 3975 }
3976
3977 return 0;
3978 case BOND_INFO_QUERY_OLD:
3979 case SIOCBONDINFOQUERY:
3980 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3981
3d632c3f 3982 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
1da177e4 3983 return -EFAULT;
1da177e4
LT		 3984
3985 res = bond_info_query(bond_dev, &k_binfo);
3d632c3f
SH		 3986 if (res == 0 &&
3987 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3988 return -EFAULT;
1da177e4
LT		 3989
3990 return res;
3991 case BOND_SLAVE_INFO_QUERY_OLD:
3992 case SIOCBONDSLAVEINFOQUERY:
3993 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3994
3d632c3f 3995 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
1da177e4 3996 return -EFAULT;
1da177e4
LT		 3997
3998 res = bond_slave_info_query(bond_dev, &k_sinfo);
3d632c3f
SH		 3999 if (res == 0 &&
4000 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
4001 return -EFAULT;
1da177e4
LT		 4002
4003 return res;
4004 default:
4005 /* Go on */
4006 break;
4007 }
4008
3d632c3f 4009 if (!capable(CAP_NET_ADMIN))
1da177e4 4010 return -EPERM;
1da177e4 4011
ec87fd3b 4012 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
1da177e4 4013
a4aee5c8 4014 pr_debug("slave_dev=%p:\n", slave_dev);
1da177e4 4015
3d632c3f 4016 if (!slave_dev)
1da177e4 4017 res = -ENODEV;
3d632c3f 4018 else {
a4aee5c8 4019 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
1da177e4
LT		 4020 switch (cmd) {
4021 case BOND_ENSLAVE_OLD:
4022 case SIOCBONDENSLAVE:
4023 res = bond_enslave(bond_dev, slave_dev);
4024 break;
4025 case BOND_RELEASE_OLD:
4026 case SIOCBONDRELEASE:
4027 res = bond_release(bond_dev, slave_dev);
4028 break;
4029 case BOND_SETHWADDR_OLD:
4030 case SIOCBONDSETHWADDR:
4031 res = bond_sethwaddr(bond_dev, slave_dev);
4032 break;
4033 case BOND_CHANGE_ACTIVE_OLD:
4034 case SIOCBONDCHANGEACTIVE:
4035 res = bond_ioctl_change_active(bond_dev, slave_dev);
4036 break;
4037 default:
4038 res = -EOPNOTSUPP;
4039 }
4040
4041 dev_put(slave_dev);
4042 }
4043
1da177e4
LT		 4044 return res;
4045}
4046
22bedad3
JP		 4047static bool bond_addr_in_mc_list(unsigned char *addr,
4048 struct netdev_hw_addr_list *list,
4049 int addrlen)
4050{
4051 struct netdev_hw_addr *ha;
4052
4053 netdev_hw_addr_list_for_each(ha, list)
4054 if (!memcmp(ha->addr, addr, addrlen))
4055 return true;
4056
4057 return false;
4058}
4059
1da177e4
LT		 4060static void bond_set_multicast_list(struct net_device *bond_dev)
4061{
454d7c9b 4062 struct bonding *bond = netdev_priv(bond_dev);
22bedad3
JP		 4063 struct netdev_hw_addr *ha;
4064 bool found;
1da177e4 4065
1da177e4
LT		 4066 /*
4067 * Do promisc before checking multicast_mode
4068 */
3d632c3f 4069 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
7e1a1ac1
WC		 4070 /*
4071 * FIXME: Need to handle the error when one of the multi-slaves
4072 * encounters error.
4073 */
1da177e4 4074 bond_set_promiscuity(bond, 1);
1da177e4 4075
3d632c3f
SH		 4076
4077 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
1da177e4 4078 bond_set_promiscuity(bond, -1);
3d632c3f 4079
1da177e4
LT		 4080
4081 /* set allmulti flag to slaves */
3d632c3f 4082 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
7e1a1ac1
WC		 4083 /*
4084 * FIXME: Need to handle the error when one of the multi-slaves
4085 * encounters error.
4086 */
1da177e4 4087 bond_set_allmulti(bond, 1);
1da177e4 4088
3d632c3f
SH		 4089
4090 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
1da177e4 4091 bond_set_allmulti(bond, -1);
3d632c3f 4092
1da177e4 4093
80ee5ad2
JV		 4094 read_lock(&bond->lock);
4095
1da177e4
LT		 4096 bond->flags = bond_dev->flags;
4097
4098 /* looking for addresses to add to slaves' mc list */
22bedad3
JP		 4099 netdev_for_each_mc_addr(ha, bond_dev) {
4100 found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
4101 bond_dev->addr_len);
4102 if (!found)
4103 bond_mc_add(bond, ha->addr);
1da177e4
LT		 4104 }
4105
4106 /* looking for addresses to delete from slaves' list */
22bedad3
JP		 4107 netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
4108 found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
4109 bond_dev->addr_len);
4110 if (!found)
4111 bond_mc_del(bond, ha->addr);
1da177e4
LT		 4112 }
4113
4114 /* save master's multicast list */
22bedad3
JP		 4115 __hw_addr_flush(&bond->mc_list);
4116 __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
4117 bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
1da177e4 4118
80ee5ad2 4119 read_unlock(&bond->lock);
1da177e4
LT		 4120}
4121
00829823
SH		 4122static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4123{
4124 struct bonding *bond = netdev_priv(dev);
4125 struct slave *slave = bond->first_slave;
4126
4127 if (slave) {
4128 const struct net_device_ops *slave_ops
4129 = slave->dev->netdev_ops;
4130 if (slave_ops->ndo_neigh_setup)
72e2240f 4131 return slave_ops->ndo_neigh_setup(slave->dev, parms);
00829823
SH		 4132 }
4133 return 0;
4134}
4135
1da177e4
LT		 4136/*
4137 * Change the MTU of all of a master's slaves to match the master
4138 */
4139static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4140{
454d7c9b 4141 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4142 struct slave *slave, *stop_at;
4143 int res = 0;
4144 int i;
4145
5a03cdb7 4146 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
a4aee5c8 4147 (bond_dev ? bond_dev->name : "None"), new_mtu);
1da177e4
LT		 4148
4149 /* Can't hold bond->lock with bh disabled here since
4150 * some base drivers panic. On the other hand we can't
4151 * hold bond->lock without bh disabled because we'll
4152 * deadlock. The only solution is to rely on the fact
4153 * that we're under rtnl_lock here, and the slaves
4154 * list won't change. This doesn't solve the problem
4155 * of setting the slave's MTU while it is
4156 * transmitting, but the assumption is that the base
4157 * driver can handle that.
4158 *
4159 * TODO: figure out a way to safely iterate the slaves
4160 * list, but without holding a lock around the actual
4161 * call to the base driver.
4162 */
4163
4164 bond_for_each_slave(bond, slave, i) {
a4aee5c8
JP		 4165 pr_debug("s %p s->p %p c_m %p\n",
4166 slave,
4167 slave->prev,
4168 slave->dev->netdev_ops->ndo_change_mtu);
e944ef79 4169
1da177e4
LT		 4170 res = dev_set_mtu(slave->dev, new_mtu);
4171
4172 if (res) {
4173 /* If we failed to set the slave's mtu to the new value
4174 * we must abort the operation even in ACTIVE_BACKUP
4175 * mode, because if we allow the backup slaves to have
4176 * different mtu values than the active slave we'll
4177 * need to change their mtu when doing a failover. That
4178 * means changing their mtu from timer context, which
4179 * is probably not a good idea.
4180 */
5a03cdb7 4181 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT		 4182 goto unwind;
4183 }
4184 }
4185
4186 bond_dev->mtu = new_mtu;
4187
4188 return 0;
4189
4190unwind:
4191 /* unwind from head to the slave that failed */
4192 stop_at = slave;
4193 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4194 int tmp_res;
4195
4196 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4197 if (tmp_res) {
a4aee5c8
JP		 4198 pr_debug("unwind err %d dev %s\n",
4199 tmp_res, slave->dev->name);
1da177e4
LT		 4200 }
4201 }
4202
4203 return res;
4204}
4205
4206/*
4207 * Change HW address
4208 *
4209 * Note that many devices must be down to change the HW address, and
4210 * downing the master releases all slaves. We can make bonds full of
4211 * bonding devices to test this, however.
4212 */
4213static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4214{
454d7c9b 4215 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4216 struct sockaddr *sa = addr, tmp_sa;
4217 struct slave *slave, *stop_at;
4218 int res = 0;
4219 int i;
4220
eb7cc59a
SH		 4221 if (bond->params.mode == BOND_MODE_ALB)
4222 return bond_alb_set_mac_address(bond_dev, addr);
4223
4224
a4aee5c8
JP		 4225 pr_debug("bond=%p, name=%s\n",
4226 bond, bond_dev ? bond_dev->name : "None");
1da177e4 4227
dd957c57 4228 /*
3915c1e8
JV		 4229 * If fail_over_mac is set to active, do nothing and return
4230 * success. Returning an error causes ifenslave to fail.
dd957c57 4231 */
3915c1e8 4232 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
dd957c57 4233 return 0;
2ab82852 4234
3d632c3f 4235 if (!is_valid_ether_addr(sa->sa_data))
1da177e4 4236 return -EADDRNOTAVAIL;
1da177e4
LT		 4237
4238 /* Can't hold bond->lock with bh disabled here since
4239 * some base drivers panic. On the other hand we can't
4240 * hold bond->lock without bh disabled because we'll
4241 * deadlock. The only solution is to rely on the fact
4242 * that we're under rtnl_lock here, and the slaves
4243 * list won't change. This doesn't solve the problem
4244 * of setting the slave's hw address while it is
4245 * transmitting, but the assumption is that the base
4246 * driver can handle that.
4247 *
4248 * TODO: figure out a way to safely iterate the slaves
4249 * list, but without holding a lock around the actual
4250 * call to the base driver.
4251 */
4252
4253 bond_for_each_slave(bond, slave, i) {
eb7cc59a 4254 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
5a03cdb7 4255 pr_debug("slave %p %s\n", slave, slave->dev->name);
1da177e4 4256
eb7cc59a 4257 if (slave_ops->ndo_set_mac_address == NULL) {
1da177e4 4258 res = -EOPNOTSUPP;
5a03cdb7 4259 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
1da177e4
LT		 4260 goto unwind;
4261 }
4262
4263 res = dev_set_mac_address(slave->dev, addr);
4264 if (res) {
4265 /* TODO: consider downing the slave
4266 * and retry ?
4267 * User should expect communications
4268 * breakage anyway until ARP finish
4269 * updating, so...
4270 */
5a03cdb7 4271 pr_debug("err %d %s\n", res, slave->dev->name);
1da177e4
LT		 4272 goto unwind;
4273 }
4274 }
4275
4276 /* success */
4277 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4278 return 0;
4279
4280unwind:
4281 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4282 tmp_sa.sa_family = bond_dev->type;
4283
4284 /* unwind from head to the slave that failed */
4285 stop_at = slave;
4286 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4287 int tmp_res;
4288
4289 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4290 if (tmp_res) {
a4aee5c8
JP		 4291 pr_debug("unwind err %d dev %s\n",
4292 tmp_res, slave->dev->name);
1da177e4
LT		 4293 }
4294 }
4295
4296 return res;
4297}
4298
4299static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4300{
454d7c9b 4301 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4302 struct slave *slave, *start_at;
cf5f9044 4303 int i, slave_no, res = 1;
a2fd940f 4304 struct iphdr *iph = ip_hdr(skb);
1da177e4
LT		 4305
4306 read_lock(&bond->lock);
4307
3d632c3f 4308 if (!BOND_IS_OK(bond))
1da177e4 4309 goto out;
cf5f9044 4310 /*
a2fd940f
AG		 4311 * Start with the curr_active_slave that joined the bond as the
4312 * default for sending IGMP traffic. For failover purposes one
4313 * needs to maintain some consistency for the interface that will
4314 * send the join/membership reports. The curr_active_slave found
4315 * will send all of this type of traffic.
cf5f9044 4316 */
00ae7028 4317 if ((iph->protocol == IPPROTO_IGMP) &&
a2fd940f 4318 (skb->protocol == htons(ETH_P_IP))) {
1da177e4 4319
a2fd940f
AG		 4320 read_lock(&bond->curr_slave_lock);
4321 slave = bond->curr_active_slave;
4322 read_unlock(&bond->curr_slave_lock);
4323
4324 if (!slave)
4325 goto out;
4326 } else {
4327 /*
4328 * Concurrent TX may collide on rr_tx_counter; we accept
4329 * that as being rare enough not to justify using an
4330 * atomic op here.
4331 */
4332 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4333
4334 bond_for_each_slave(bond, slave, i) {
4335 slave_no--;
4336 if (slave_no < 0)
4337 break;
4338 }
1da177e4
LT		 4339 }
4340
cf5f9044 4341 start_at = slave;
1da177e4
LT		 4342 bond_for_each_slave_from(bond, slave, i, start_at) {
4343 if (IS_UP(slave->dev) &&
4344 (slave->link == BOND_LINK_UP) &&
4345 (slave->state == BOND_STATE_ACTIVE)) {
4346 res = bond_dev_queue_xmit(bond, skb, slave->dev);
1da177e4
LT		 4347 break;
4348 }
4349 }
4350
1da177e4
LT		 4351out:
4352 if (res) {
4353 /* no suitable interface, frame not sent */
4354 dev_kfree_skb(skb);
4355 }
4356 read_unlock(&bond->lock);
ec634fe3 4357 return NETDEV_TX_OK;
1da177e4
LT		 4358}
4359
075897ce 4360
1da177e4
LT		 4361/*
4362 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4363 * the bond has a usable interface.
4364 */
4365static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4366{
454d7c9b 4367 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4368 int res = 1;
4369
1da177e4
LT		 4370 read_lock(&bond->lock);
4371 read_lock(&bond->curr_slave_lock);
4372
3d632c3f 4373 if (!BOND_IS_OK(bond))
1da177e4 4374 goto out;
1da177e4 4375
075897ce
JL		 4376 if (!bond->curr_active_slave)
4377 goto out;
4378
075897ce
JL		 4379 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4380
1da177e4 4381out:
3d632c3f 4382 if (res)
1da177e4
LT		 4383 /* no suitable interface, frame not sent */
4384 dev_kfree_skb(skb);
3d632c3f 4385
1da177e4
LT		 4386 read_unlock(&bond->curr_slave_lock);
4387 read_unlock(&bond->lock);
ec634fe3 4388 return NETDEV_TX_OK;
1da177e4
LT		 4389}
4390
4391/*
169a3e66
JV		 4392 * In bond_xmit_xor() , we determine the output device by using a pre-
4393 * determined xmit_hash_policy(), If the selected device is not enabled,
4394 * find the next active slave.
1da177e4
LT		 4395 */
4396static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4397{
454d7c9b 4398 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4399 struct slave *slave, *start_at;
4400 int slave_no;
4401 int i;
4402 int res = 1;
4403
4404 read_lock(&bond->lock);
4405
3d632c3f 4406 if (!BOND_IS_OK(bond))
1da177e4 4407 goto out;
1da177e4 4408
a361c83c 4409 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
1da177e4
LT		 4410
4411 bond_for_each_slave(bond, slave, i) {
4412 slave_no--;
3d632c3f 4413 if (slave_no < 0)
1da177e4 4414 break;
1da177e4
LT		 4415 }
4416
4417 start_at = slave;
4418
4419 bond_for_each_slave_from(bond, slave, i, start_at) {
4420 if (IS_UP(slave->dev) &&
4421 (slave->link == BOND_LINK_UP) &&
4422 (slave->state == BOND_STATE_ACTIVE)) {
4423 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4424 break;
4425 }
4426 }
4427
4428out:
4429 if (res) {
4430 /* no suitable interface, frame not sent */
4431 dev_kfree_skb(skb);
4432 }
4433 read_unlock(&bond->lock);
ec634fe3 4434 return NETDEV_TX_OK;
1da177e4
LT		 4435}
4436
4437/*
4438 * in broadcast mode, we send everything to all usable interfaces.
4439 */
4440static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4441{
454d7c9b 4442 struct bonding *bond = netdev_priv(bond_dev);
1da177e4
LT		 4443 struct slave *slave, *start_at;
4444 struct net_device *tx_dev = NULL;
4445 int i;
4446 int res = 1;
4447
4448 read_lock(&bond->lock);
4449
3d632c3f 4450 if (!BOND_IS_OK(bond))
1da177e4 4451 goto out;
1da177e4
LT		 4452
4453 read_lock(&bond->curr_slave_lock);
4454 start_at = bond->curr_active_slave;
4455 read_unlock(&bond->curr_slave_lock);
4456
3d632c3f 4457 if (!start_at)
1da177e4 4458 goto out;
1da177e4
LT		 4459
4460 bond_for_each_slave_from(bond, slave, i, start_at) {
4461 if (IS_UP(slave->dev) &&
4462 (slave->link == BOND_LINK_UP) &&
4463 (slave->state == BOND_STATE_ACTIVE)) {
4464 if (tx_dev) {
4465 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4466 if (!skb2) {
a4aee5c8 4467 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
4e0952c7 4468 bond_dev->name);
1da177e4
LT		 4469 continue;
4470 }
4471
4472 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4473 if (res) {
4474 dev_kfree_skb(skb2);
4475 continue;
4476 }
4477 }
4478 tx_dev = slave->dev;
4479 }
4480 }
4481
3d632c3f 4482 if (tx_dev)
1da177e4 4483 res = bond_dev_queue_xmit(bond, skb, tx_dev);
1da177e4
LT		 4484
4485out:
3d632c3f 4486 if (res)
1da177e4
LT		 4487 /* no suitable interface, frame not sent */
4488 dev_kfree_skb(skb);
3d632c3f 4489
1da177e4
LT		 4490 /* frame sent to all suitable interfaces */
4491 read_unlock(&bond->lock);
ec634fe3 4492 return NETDEV_TX_OK;
1da177e4
LT		 4493}
4494
4495/*------------------------- Device initialization ---------------------------*/
4496
6f6652be
JV		 4497static void bond_set_xmit_hash_policy(struct bonding *bond)
4498{
4499 switch (bond->params.xmit_policy) {
4500 case BOND_XMIT_POLICY_LAYER23:
4501 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4502 break;
4503 case BOND_XMIT_POLICY_LAYER34:
4504 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4505 break;
4506 case BOND_XMIT_POLICY_LAYER2:
4507 default:
4508 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4509 break;
4510 }
4511}
4512
bb1d9123
AG		 4513/*
4514 * Lookup the slave that corresponds to a qid
4515 */
4516static inline int bond_slave_override(struct bonding *bond,
4517 struct sk_buff *skb)
4518{
4519 int i, res = 1;
4520 struct slave *slave = NULL;
4521 struct slave *check_slave;
4522
4523 read_lock(&bond->lock);
4524
4525 if (!BOND_IS_OK(bond) || !skb->queue_mapping)
4526 goto out;
4527
4528 /* Find out if any slaves have the same mapping as this skb. */
4529 bond_for_each_slave(bond, check_slave, i) {
4530 if (check_slave->queue_id == skb->queue_mapping) {
4531 slave = check_slave;
4532 break;
4533 }
4534 }
4535
4536 /* If the slave isn't UP, use default transmit policy. */
4537 if (slave && slave->queue_id && IS_UP(slave->dev) &&
4538 (slave->link == BOND_LINK_UP)) {
4539 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4540 }
4541
4542out:
4543 read_unlock(&bond->lock);
4544 return res;
4545}
4546
4547static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
4548{
4549 /*
4550 * This helper function exists to help dev_pick_tx get the correct
4551 * destination queue. Using a helper function skips the a call to
4552 * skb_tx_hash and will put the skbs in the queue we expect on their
4553 * way down to the bonding driver.
4554 */
4555 return skb->queue_mapping;
4556}
4557
424efe9c 4558static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
00829823 4559{
bb1d9123
AG		 4560 struct bonding *bond = netdev_priv(dev);
4561
4562 if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
4563 if (!bond_slave_override(bond, skb))
4564 return NETDEV_TX_OK;
4565 }
00829823
SH		 4566
4567 switch (bond->params.mode) {
4568 case BOND_MODE_ROUNDROBIN:
4569 return bond_xmit_roundrobin(skb, dev);
4570 case BOND_MODE_ACTIVEBACKUP:
4571 return bond_xmit_activebackup(skb, dev);
4572 case BOND_MODE_XOR:
4573 return bond_xmit_xor(skb, dev);
4574 case BOND_MODE_BROADCAST:
4575 return bond_xmit_broadcast(skb, dev);
4576 case BOND_MODE_8023AD:
4577 return bond_3ad_xmit_xor(skb, dev);
4578 case BOND_MODE_ALB:
4579 case BOND_MODE_TLB:
4580 return bond_alb_xmit(skb, dev);
4581 default:
4582 /* Should never happen, mode already checked */
a4aee5c8
JP		 4583 pr_err("%s: Error: Unknown bonding mode %d\n",
4584 dev->name, bond->params.mode);
00829823
SH		 4585 WARN_ON_ONCE(1);
4586 dev_kfree_skb(skb);
4587 return NETDEV_TX_OK;
4588 }
4589}
4590
4591
1da177e4
LT		 4592/*
4593 * set bond mode specific net device operations
4594 */
a77b5325 4595void bond_set_mode_ops(struct bonding *bond, int mode)
1da177e4 4596{
169a3e66
JV		 4597 struct net_device *bond_dev = bond->dev;
4598
1da177e4
LT		 4599 switch (mode) {
4600 case BOND_MODE_ROUNDROBIN:
1da177e4
LT		 4601 break;
4602 case BOND_MODE_ACTIVEBACKUP:
1da177e4
LT		 4603 break;
4604 case BOND_MODE_XOR:
6f6652be 4605 bond_set_xmit_hash_policy(bond);
1da177e4
LT		 4606 break;
4607 case BOND_MODE_BROADCAST:
1da177e4
LT		 4608 break;
4609 case BOND_MODE_8023AD:
8f903c70 4610 bond_set_master_3ad_flags(bond);
6f6652be 4611 bond_set_xmit_hash_policy(bond);
1da177e4 4612 break;
1da177e4 4613 case BOND_MODE_ALB:
8f903c70
JV		 4614 bond_set_master_alb_flags(bond);
4615 /* FALLTHRU */
4616 case BOND_MODE_TLB:
1da177e4
LT		 4617 break;
4618 default:
4619 /* Should never happen, mode already checked */
a4aee5c8
JP		 4620 pr_err("%s: Error: Unknown bonding mode %d\n",
4621 bond_dev->name, mode);
1da177e4
LT		 4622 break;
4623 }
4624}
4625
217df670
JV		 4626static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4627 struct ethtool_drvinfo *drvinfo)
4628{
4629 strncpy(drvinfo->driver, DRV_NAME, 32);
4630 strncpy(drvinfo->version, DRV_VERSION, 32);
4631 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4632}
4633
7282d491 4634static const struct ethtool_ops bond_ethtool_ops = {
217df670 4635 .get_drvinfo = bond_ethtool_get_drvinfo,
fa53ebac
SH		 4636 .get_link = ethtool_op_get_link,
4637 .get_tx_csum = ethtool_op_get_tx_csum,
4638 .get_sg = ethtool_op_get_sg,
4639 .get_tso = ethtool_op_get_tso,
4640 .get_ufo = ethtool_op_get_ufo,
4641 .get_flags = ethtool_op_get_flags,
8531c5ff
AK		 4642};
4643
eb7cc59a 4644static const struct net_device_ops bond_netdev_ops = {
181470fc 4645 .ndo_init = bond_init,
9e71626c 4646 .ndo_uninit = bond_uninit,
eb7cc59a
SH		 4647 .ndo_open = bond_open,
4648 .ndo_stop = bond_close,
00829823 4649 .ndo_start_xmit = bond_start_xmit,
bb1d9123 4650 .ndo_select_queue = bond_select_queue,
be1f3c2c 4651 .ndo_get_stats64 = bond_get_stats,
eb7cc59a
SH		 4652 .ndo_do_ioctl = bond_do_ioctl,
4653 .ndo_set_multicast_list = bond_set_multicast_list,
4654 .ndo_change_mtu = bond_change_mtu,
eb7cc59a 4655 .ndo_set_mac_address = bond_set_mac_address,
00829823 4656 .ndo_neigh_setup = bond_neigh_setup,
eb7cc59a
SH		 4657 .ndo_vlan_rx_register = bond_vlan_rx_register,
4658 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4659 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
f6dc31a8
WC		 4660#ifdef CONFIG_NET_POLL_CONTROLLER
4661 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4662 .ndo_poll_controller = bond_poll_controller,
4663#endif
eb7cc59a
SH		 4664};
4665
9e2e61fb
AW		 4666static void bond_destructor(struct net_device *bond_dev)
4667{
4668 struct bonding *bond = netdev_priv(bond_dev);
4669 if (bond->wq)
4670 destroy_workqueue(bond->wq);
4671 free_netdev(bond_dev);
4672}
4673
181470fc 4674static void bond_setup(struct net_device *bond_dev)
1da177e4 4675{
454d7c9b 4676 struct bonding *bond = netdev_priv(bond_dev);
1da177e4 4677
1da177e4
LT		 4678 /* initialize rwlocks */
4679 rwlock_init(&bond->lock);
4680 rwlock_init(&bond->curr_slave_lock);
4681
d2991f75 4682 bond->params = bonding_defaults;
1da177e4
LT		 4683
4684 /* Initialize pointers */
1da177e4
LT		 4685 bond->dev = bond_dev;
4686 INIT_LIST_HEAD(&bond->vlan_list);
4687
4688 /* Initialize the device entry points */
181470fc 4689 ether_setup(bond_dev);
eb7cc59a 4690 bond_dev->netdev_ops = &bond_netdev_ops;
8531c5ff 4691 bond_dev->ethtool_ops = &bond_ethtool_ops;
169a3e66 4692 bond_set_mode_ops(bond, bond->params.mode);
1da177e4 4693
9e2e61fb 4694 bond_dev->destructor = bond_destructor;
1da177e4
LT		 4695
4696 /* Initialize the device options */
4697 bond_dev->tx_queue_len = 0;
4698 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
0b680e75 4699 bond_dev->priv_flags |= IFF_BONDING;
181470fc
SH		 4700 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4701
6cf3f41e
JV		 4702 if (bond->params.arp_interval)
4703 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
1da177e4
LT		 4704
4705 /* At first, we block adding VLANs. That's the only way to
4706 * prevent problems that occur when adding VLANs over an
4707 * empty bond. The block will be removed once non-challenged
4708 * slaves are enslaved.
4709 */
4710 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4711
932ff279 4712 /* don't acquire bond device's netif_tx_lock when
1da177e4
LT		 4713 * transmitting */
4714 bond_dev->features |= NETIF_F_LLTX;
4715
4716 /* By default, we declare the bond to be fully
4717 * VLAN hardware accelerated capable. Special
4718 * care is taken in the various xmit functions
4719 * when there are slaves that are not hw accel
4720 * capable
4721 */
1da177e4
LT		 4722 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4723 NETIF_F_HW_VLAN_RX |
4724 NETIF_F_HW_VLAN_FILTER);
4725
e6599c2e
ED		 4726 /* By default, we enable GRO on bonding devices.
4727 * Actual support requires lowlevel drivers are GRO ready.
4728 */
4729 bond_dev->features |= NETIF_F_GRO;
1da177e4
LT		 4730}
4731
fdaea7a9
JV		 4732static void bond_work_cancel_all(struct bonding *bond)
4733{
4734 write_lock_bh(&bond->lock);
4735 bond->kill_timers = 1;
4736 write_unlock_bh(&bond->lock);
4737
4738 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4739 cancel_delayed_work(&bond->mii_work);
4740
4741 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4742 cancel_delayed_work(&bond->arp_work);
4743
4744 if (bond->params.mode == BOND_MODE_ALB &&
4745 delayed_work_pending(&bond->alb_work))
4746 cancel_delayed_work(&bond->alb_work);
4747
4748 if (bond->params.mode == BOND_MODE_8023AD &&
4749 delayed_work_pending(&bond->ad_work))
4750 cancel_delayed_work(&bond->ad_work);
5a37e8ca
FL		 4751
4752 if (delayed_work_pending(&bond->mcast_work))
4753 cancel_delayed_work(&bond->mcast_work);
fdaea7a9
JV		 4754}
4755
c67dfb29
EB		 4756/*
4757* Destroy a bonding device.
4758* Must be under rtnl_lock when this function is called.
4759*/
4760static void bond_uninit(struct net_device *bond_dev)
a434e43f 4761{
454d7c9b 4762 struct bonding *bond = netdev_priv(bond_dev);
f35188fa 4763 struct vlan_entry *vlan, *tmp;
a434e43f 4764
f6dc31a8
WC		 4765 bond_netpoll_cleanup(bond_dev);
4766
c67dfb29
EB		 4767 /* Release the bonded slaves */
4768 bond_release_all(bond_dev);
4769
a434e43f
JV		 4770 list_del(&bond->bond_list);
4771
4772 bond_work_cancel_all(bond);
4773
a434e43f 4774 bond_remove_proc_entry(bond);
c67dfb29 4775
22bedad3 4776 __hw_addr_flush(&bond->mc_list);
f35188fa
JV		 4777
4778 list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
4779 list_del(&vlan->vlan_list);
4780 kfree(vlan);
4781 }
a434e43f
JV		 4782}
4783
1da177e4
LT		 4784/*------------------------- Module initialization ---------------------------*/
4785
4786/*
4787 * Convert string input module parms. Accept either the
ece95f7f
JV		 4788 * number of the mode or its string name. A bit complicated because
4789 * some mode names are substrings of other names, and calls from sysfs
4790 * may have whitespace in the name (trailing newlines, for example).
1da177e4 4791 */
325dcf7a 4792int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
1da177e4 4793{
54b87323 4794 int modeint = -1, i, rv;
a42e534f 4795 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
ece95f7f 4796
a42e534f
JV		 4797 for (p = (char *)buf; *p; p++)
4798 if (!(isdigit(*p) || isspace(*p)))
4799 break;
4800
4801 if (*p)
ece95f7f 4802 rv = sscanf(buf, "%20s", modestr);
a42e534f 4803 else
54b87323 4804 rv = sscanf(buf, "%d", &modeint);
a42e534f
JV		 4805
4806 if (!rv)
4807 return -1;
1da177e4
LT		 4808
4809 for (i = 0; tbl[i].modename; i++) {
54b87323 4810 if (modeint == tbl[i].mode)
ece95f7f
JV		 4811 return tbl[i].mode;
4812 if (strcmp(modestr, tbl[i].modename) == 0)
1da177e4 4813 return tbl[i].mode;
1da177e4
LT		 4814 }
4815
4816 return -1;
4817}
4818
4819static int bond_check_params(struct bond_params *params)
4820{
a549952a 4821 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
f5b2b966 4822
1da177e4
LT		 4823 /*
4824 * Convert string parameters.
4825 */
4826 if (mode) {
4827 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4828 if (bond_mode == -1) {
a4aee5c8 4829 pr_err("Error: Invalid bonding mode \"%s\"\n",
1da177e4
LT		 4830 mode == NULL ? "NULL" : mode);
4831 return -EINVAL;
4832 }
4833 }
4834
169a3e66
JV		 4835 if (xmit_hash_policy) {
4836 if ((bond_mode != BOND_MODE_XOR) &&
4837 (bond_mode != BOND_MODE_8023AD)) {
a4aee5c8 4838 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
169a3e66
JV		 4839 bond_mode_name(bond_mode));
4840 } else {
4841 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4842 xmit_hashtype_tbl);
4843 if (xmit_hashtype == -1) {
a4aee5c8 4844 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
3d632c3f 4845 xmit_hash_policy == NULL ? "NULL" :
169a3e66
JV		 4846 xmit_hash_policy);
4847 return -EINVAL;
4848 }
4849 }
4850 }
4851
1da177e4
LT		 4852 if (lacp_rate) {
4853 if (bond_mode != BOND_MODE_8023AD) {
a4aee5c8
JP		 4854 pr_info("lacp_rate param is irrelevant in mode %s\n",
4855 bond_mode_name(bond_mode));
1da177e4
LT		 4856 } else {
4857 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4858 if (lacp_fast == -1) {
a4aee5c8 4859 pr_err("Error: Invalid lacp rate \"%s\"\n",
1da177e4
LT		 4860 lacp_rate == NULL ? "NULL" : lacp_rate);
4861 return -EINVAL;
4862 }
4863 }
4864 }
4865
fd989c83
JV		 4866 if (ad_select) {
4867 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4868 if (params->ad_select == -1) {
a4aee5c8 4869 pr_err("Error: Invalid ad_select \"%s\"\n",
fd989c83
JV		 4870 ad_select == NULL ? "NULL" : ad_select);
4871 return -EINVAL;
4872 }
4873
4874 if (bond_mode != BOND_MODE_8023AD) {
a4aee5c8 4875 pr_warning("ad_select param only affects 802.3ad mode\n");
fd989c83
JV		 4876 }
4877 } else {
4878 params->ad_select = BOND_AD_STABLE;
4879 }
4880
f5841306 4881 if (max_bonds < 0) {
a4aee5c8
JP		 4882 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4883 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
1da177e4
LT		 4884 max_bonds = BOND_DEFAULT_MAX_BONDS;
4885 }
4886
4887 if (miimon < 0) {
a4aee5c8
JP		 4888 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4889 miimon, INT_MAX, BOND_LINK_MON_INTERV);
1da177e4
LT		 4890 miimon = BOND_LINK_MON_INTERV;
4891 }
4892
4893 if (updelay < 0) {
a4aee5c8
JP		 4894 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4895 updelay, INT_MAX);
1da177e4
LT		 4896 updelay = 0;
4897 }
4898
4899 if (downdelay < 0) {
a4aee5c8
JP		 4900 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4901 downdelay, INT_MAX);
1da177e4
LT		 4902 downdelay = 0;
4903 }
4904
4905 if ((use_carrier != 0) && (use_carrier != 1)) {
a4aee5c8
JP		 4906 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4907 use_carrier);
1da177e4
LT		 4908 use_carrier = 1;
4909 }
4910
7893b249 4911 if (num_grat_arp < 0 || num_grat_arp > 255) {
2381a55c 4912 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
a4aee5c8 4913 num_grat_arp);
7893b249
MS		 4914 num_grat_arp = 1;
4915 }
4916
305d552a 4917 if (num_unsol_na < 0 || num_unsol_na > 255) {
2381a55c 4918 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
a4aee5c8 4919 num_unsol_na);
305d552a
BH		 4920 num_unsol_na = 1;
4921 }
4922
1da177e4
LT		 4923 /* reset values for 802.3ad */
4924 if (bond_mode == BOND_MODE_8023AD) {
4925 if (!miimon) {
a4aee5c8 4926 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n");
3d632c3f 4927 pr_warning("Forcing miimon to 100msec\n");
1da177e4
LT		 4928 miimon = 100;
4929 }
4930 }
4931
bb1d9123
AG		 4932 if (tx_queues < 1 || tx_queues > 255) {
4933 pr_warning("Warning: tx_queues (%d) should be between "
4934 "1 and 255, resetting to %d\n",
4935 tx_queues, BOND_DEFAULT_TX_QUEUES);
4936 tx_queues = BOND_DEFAULT_TX_QUEUES;
4937 }
4938
ebd8e497
AG		 4939 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4940 pr_warning("Warning: all_slaves_active module parameter (%d), "
4941 "not of valid value (0/1), so it was set to "
4942 "0\n", all_slaves_active);
4943 all_slaves_active = 0;
4944 }
4945
c2952c31
FL		 4946 if (resend_igmp < 0 || resend_igmp > 255) {
4947 pr_warning("Warning: resend_igmp (%d) should be between "
4948 "0 and 255, resetting to %d\n",
4949 resend_igmp, BOND_DEFAULT_RESEND_IGMP);
4950 resend_igmp = BOND_DEFAULT_RESEND_IGMP;
4951 }
4952
1da177e4
LT		 4953 /* reset values for TLB/ALB */
4954 if ((bond_mode == BOND_MODE_TLB) ||
4955 (bond_mode == BOND_MODE_ALB)) {
4956 if (!miimon) {
a4aee5c8 4957 pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n");
3d632c3f 4958 pr_warning("Forcing miimon to 100msec\n");
1da177e4
LT		 4959 miimon = 100;
4960 }
4961 }
4962
4963 if (bond_mode == BOND_MODE_ALB) {
a4aee5c8
JP		 4964 pr_notice("In ALB mode you might experience client disconnections upon reconnection of a link if the bonding module updelay parameter (%d msec) is incompatible with the forwarding delay time of the switch\n",
4965 updelay);
1da177e4
LT		 4966 }
4967
4968 if (!miimon) {
4969 if (updelay || downdelay) {
4970 /* just warn the user the up/down delay will have
4971 * no effect since miimon is zero...
4972 */
a4aee5c8
JP		 4973 pr_warning("Warning: miimon module parameter not set and updelay (%d) or downdelay (%d) module parameter is set; updelay and downdelay have no effect unless miimon is set\n",
4974 updelay, downdelay);
1da177e4
LT		 4975 }
4976 } else {
4977 /* don't allow arp monitoring */
4978 if (arp_interval) {
a4aee5c8
JP		 4979 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4980 miimon, arp_interval);
1da177e4
LT		 4981 arp_interval = 0;
4982 }
4983
4984 if ((updelay % miimon) != 0) {
a4aee5c8
JP		 4985 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4986 updelay, miimon,
4987 (updelay / miimon) * miimon);
1da177e4
LT		 4988 }
4989
4990 updelay /= miimon;
4991
4992 if ((downdelay % miimon) != 0) {
a4aee5c8
JP		 4993 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4994 downdelay, miimon,
4995 (downdelay / miimon) * miimon);
1da177e4
LT		 4996 }
4997
4998 downdelay /= miimon;
4999 }
5000
5001 if (arp_interval < 0) {
a4aee5c8
JP		 5002 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
5003 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
1da177e4
LT		 5004 arp_interval = BOND_LINK_ARP_INTERV;
5005 }
5006
5007 for (arp_ip_count = 0;
5008 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
5009 arp_ip_count++) {
5010 /* not complete check, but should be good enough to
5011 catch mistakes */
5012 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
a4aee5c8
JP		 5013 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
5014 arp_ip_target[arp_ip_count]);
1da177e4
LT		 5015 arp_interval = 0;
5016 } else {
d3bb52b0 5017 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
1da177e4
LT		 5018 arp_target[arp_ip_count] = ip;
5019 }
5020 }
5021
5022 if (arp_interval && !arp_ip_count) {
5023 /* don't allow arping if no arp_ip_target given... */
a4aee5c8
JP		 5024 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
5025 arp_interval);
1da177e4
LT		 5026 arp_interval = 0;
5027 }
5028
f5b2b966
JV		 5029 if (arp_validate) {
5030 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
a4aee5c8 5031 pr_err("arp_validate only supported in active-backup mode\n");
f5b2b966
JV		 5032 return -EINVAL;
5033 }
5034 if (!arp_interval) {
a4aee5c8 5035 pr_err("arp_validate requires arp_interval\n");
f5b2b966
JV		 5036 return -EINVAL;
5037 }
5038
5039 arp_validate_value = bond_parse_parm(arp_validate,
5040 arp_validate_tbl);
5041 if (arp_validate_value == -1) {
a4aee5c8 5042 pr_err("Error: invalid arp_validate \"%s\"\n",
f5b2b966
JV		 5043 arp_validate == NULL ? "NULL" : arp_validate);
5044 return -EINVAL;
5045 }
5046 } else
5047 arp_validate_value = 0;
5048
1da177e4 5049 if (miimon) {
a4aee5c8 5050 pr_info("MII link monitoring set to %d ms\n", miimon);
1da177e4
LT		 5051 } else if (arp_interval) {
5052 int i;
5053
a4aee5c8
JP		 5054 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
5055 arp_interval,
5056 arp_validate_tbl[arp_validate_value].modename,
5057 arp_ip_count);
1da177e4
LT		 5058
5059 for (i = 0; i < arp_ip_count; i++)
e5e2a8fd 5060 pr_info(" %s", arp_ip_target[i]);
1da177e4 5061
e5e2a8fd 5062 pr_info("\n");
1da177e4 5063
b8a9787e 5064 } else if (max_bonds) {
1da177e4
LT		 5065 /* miimon and arp_interval not set, we need one so things
5066 * work as expected, see bonding.txt for details
5067 */
a4aee5c8 5068 pr_warning("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n");
1da177e4
LT		 5069 }
5070
5071 if (primary && !USES_PRIMARY(bond_mode)) {
5072 /* currently, using a primary only makes sense
5073 * in active backup, TLB or ALB modes
5074 */
a4aee5c8
JP		 5075 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
5076 primary, bond_mode_name(bond_mode));
1da177e4
LT		 5077 primary = NULL;
5078 }
5079
a549952a
JP		 5080 if (primary && primary_reselect) {
5081 primary_reselect_value = bond_parse_parm(primary_reselect,
5082 pri_reselect_tbl);
5083 if (primary_reselect_value == -1) {
a4aee5c8 5084 pr_err("Error: Invalid primary_reselect \"%s\"\n",
a549952a
JP		 5085 primary_reselect ==
5086 NULL ? "NULL" : primary_reselect);
5087 return -EINVAL;
5088 }
5089 } else {
5090 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
5091 }
5092
3915c1e8
JV		 5093 if (fail_over_mac) {
5094 fail_over_mac_value = bond_parse_parm(fail_over_mac,
5095 fail_over_mac_tbl);
5096 if (fail_over_mac_value == -1) {
a4aee5c8 5097 pr_err("Error: invalid fail_over_mac \"%s\"\n",
3915c1e8
JV		 5098 arp_validate == NULL ? "NULL" : arp_validate);
5099 return -EINVAL;
5100 }
5101
5102 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
a4aee5c8 5103 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
3915c1e8
JV		 5104 } else {
5105 fail_over_mac_value = BOND_FOM_NONE;
5106 }
dd957c57 5107
1da177e4
LT		 5108 /* fill params struct with the proper values */
5109 params->mode = bond_mode;
169a3e66 5110 params->xmit_policy = xmit_hashtype;
1da177e4 5111 params->miimon = miimon;
7893b249 5112 params->num_grat_arp = num_grat_arp;
305d552a 5113 params->num_unsol_na = num_unsol_na;
1da177e4 5114 params->arp_interval = arp_interval;
f5b2b966 5115 params->arp_validate = arp_validate_value;
1da177e4
LT		 5116 params->updelay = updelay;
5117 params->downdelay = downdelay;
5118 params->use_carrier = use_carrier;
5119 params->lacp_fast = lacp_fast;
5120 params->primary[0] = 0;
a549952a 5121 params->primary_reselect = primary_reselect_value;
3915c1e8 5122 params->fail_over_mac = fail_over_mac_value;
bb1d9123 5123 params->tx_queues = tx_queues;
ebd8e497 5124 params->all_slaves_active = all_slaves_active;
c2952c31 5125 params->resend_igmp = resend_igmp;
1da177e4
LT		 5126
5127 if (primary) {
5128 strncpy(params->primary, primary, IFNAMSIZ);
5129 params->primary[IFNAMSIZ - 1] = 0;
5130 }
5131
5132 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5133
5134 return 0;
5135}
5136
0daa2303 5137static struct lock_class_key bonding_netdev_xmit_lock_key;
cf508b12 5138static struct lock_class_key bonding_netdev_addr_lock_key;
0daa2303 5139
e8a0464c
DM		 5140static void bond_set_lockdep_class_one(struct net_device *dev,
5141 struct netdev_queue *txq,
5142 void *_unused)
c773e847
DM		 5143{
5144 lockdep_set_class(&txq->_xmit_lock,
5145 &bonding_netdev_xmit_lock_key);
5146}
5147
5148static void bond_set_lockdep_class(struct net_device *dev)
5149{
cf508b12
DM		 5150 lockdep_set_class(&dev->addr_list_lock,
5151 &bonding_netdev_addr_lock_key);
e8a0464c 5152 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
c773e847
DM		 5153}
5154
181470fc
SH		 5155/*
5156 * Called from registration process
5157 */
5158static int bond_init(struct net_device *bond_dev)
5159{
5160 struct bonding *bond = netdev_priv(bond_dev);
ec87fd3b 5161 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
181470fc
SH		 5162
5163 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5164
5165 bond->wq = create_singlethread_workqueue(bond_dev->name);
5166 if (!bond->wq)
5167 return -ENOMEM;
5168
5169 bond_set_lockdep_class(bond_dev);
5170
5171 netif_carrier_off(bond_dev);
5172
5173 bond_create_proc_entry(bond);
ec87fd3b 5174 list_add_tail(&bond->bond_list, &bn->dev_list);
181470fc 5175
6151b3d4 5176 bond_prepare_sysfs_group(bond);
22bedad3
JP		 5177
5178 __hw_addr_init(&bond->mc_list);
181470fc
SH		 5179 return 0;
5180}
5181
88ead977
EB		 5182static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
5183{
5184 if (tb[IFLA_ADDRESS]) {
5185 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
5186 return -EINVAL;
5187 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
5188 return -EADDRNOTAVAIL;
5189 }
5190 return 0;
5191}
5192
5193static struct rtnl_link_ops bond_link_ops __read_mostly = {
5194 .kind = "bond",
6639104b 5195 .priv_size = sizeof(struct bonding),
88ead977
EB		 5196 .setup = bond_setup,
5197 .validate = bond_validate,
5198};
5199
dfe60397 5200/* Create a new bond based on the specified name and bonding parameters.
e4b91c48 5201 * If name is NULL, obtain a suitable "bond%d" name for us.
dfe60397
MW		 5202 * Caller must NOT hold rtnl_lock; we need to release it here before we
5203 * set up our sysfs entries.
5204 */
ec87fd3b 5205int bond_create(struct net *net, const char *name)
dfe60397
MW		 5206{
5207 struct net_device *bond_dev;
5208 int res;
5209
5210 rtnl_lock();
027ea041 5211
bb1d9123
AG		 5212 bond_dev = alloc_netdev_mq(sizeof(struct bonding), name ? name : "",
5213 bond_setup, tx_queues);
dfe60397 5214 if (!bond_dev) {
a4aee5c8 5215 pr_err("%s: eek! can't alloc netdev!\n", name);
9e2e61fb
AW		 5216 rtnl_unlock();
5217 return -ENOMEM;
dfe60397
MW		 5218 }
5219
ec87fd3b 5220 dev_net_set(bond_dev, net);
88ead977
EB		 5221 bond_dev->rtnl_link_ops = &bond_link_ops;
5222
e4b91c48
JV		 5223 if (!name) {
5224 res = dev_alloc_name(bond_dev, "bond%d");
5225 if (res < 0)
9e2e61fb 5226 goto out;
e4b91c48
JV		 5227 }
5228
dfe60397 5229 res = register_netdevice(bond_dev);
0daa2303 5230
30c15ba9 5231out:
7e083840 5232 rtnl_unlock();
9e2e61fb
AW		 5233 if (res < 0)
5234 bond_destructor(bond_dev);
30c15ba9 5235 return res;
dfe60397
MW		 5236}
5237
2c8c1e72 5238static int __net_init bond_net_init(struct net *net)
ec87fd3b 5239{
15449745 5240 struct bond_net *bn = net_generic(net, bond_net_id);
ec87fd3b
EB		 5241
5242 bn->net = net;
5243 INIT_LIST_HEAD(&bn->dev_list);
5244
ec87fd3b 5245 bond_create_proc_dir(bn);
15449745
EB		 5246
5247 return 0;
ec87fd3b
EB		 5248}
5249
2c8c1e72 5250static void __net_exit bond_net_exit(struct net *net)
ec87fd3b 5251{
15449745 5252 struct bond_net *bn = net_generic(net, bond_net_id);
ec87fd3b
EB		 5253
5254 bond_destroy_proc_dir(bn);
ec87fd3b
EB		 5255}
5256
5257static struct pernet_operations bond_net_ops = {
5258 .init = bond_net_init,
5259 .exit = bond_net_exit,
15449745
EB		 5260 .id = &bond_net_id,
5261 .size = sizeof(struct bond_net),
ec87fd3b
EB		 5262};
5263
1da177e4
LT		 5264static int __init bonding_init(void)
5265{
1da177e4
LT		 5266 int i;
5267 int res;
5268
3d632c3f 5269 pr_info("%s", version);
1da177e4 5270
dfe60397 5271 res = bond_check_params(&bonding_defaults);
3d632c3f 5272 if (res)
dfe60397 5273 goto out;
1da177e4 5274
15449745 5275 res = register_pernet_subsys(&bond_net_ops);
ec87fd3b
EB		 5276 if (res)
5277 goto out;
027ea041 5278
88ead977
EB		 5279 res = rtnl_link_register(&bond_link_ops);
5280 if (res)
6639104b 5281 goto err_link;
88ead977 5282
1da177e4 5283 for (i = 0; i < max_bonds; i++) {
ec87fd3b 5284 res = bond_create(&init_net, NULL);
dfe60397
MW		 5285 if (res)
5286 goto err;
1da177e4
LT		 5287 }
5288
b76cdba9
MW		 5289 res = bond_create_sysfs();
5290 if (res)
5291 goto err;
5292
1da177e4 5293 register_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5294 register_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5295 bond_register_ipv6_notifier();
dfe60397 5296out:
1da177e4 5297 return res;
88ead977
EB		 5298err:
5299 rtnl_link_unregister(&bond_link_ops);
6639104b 5300err_link:
15449745 5301 unregister_pernet_subsys(&bond_net_ops);
88ead977 5302 goto out;
dfe60397 5303
1da177e4
LT		 5304}
5305
5306static void __exit bonding_exit(void)
5307{
5308 unregister_netdevice_notifier(&bond_netdev_notifier);
c3ade5ca 5309 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
305d552a 5310 bond_unregister_ipv6_notifier();
1da177e4 5311
ae68c398
PE		 5312 bond_destroy_sysfs();
5313
88ead977 5314 rtnl_link_unregister(&bond_link_ops);
15449745 5315 unregister_pernet_subsys(&bond_net_ops);
1da177e4
LT		 5316}
5317
5318module_init(bonding_init);
5319module_exit(bonding_exit);
5320MODULE_LICENSE("GPL");
5321MODULE_VERSION(DRV_VERSION);
5322MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5323MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
88ead977 5324MODULE_ALIAS_RTNL_LINK("bond");
Clone of davem's net-next-2.6 tree