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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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 *
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 */
33
Joe Perchesa4aee5c2009-12-13 20:06:07 -080034#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
35
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/kernel.h>
37#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#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>
Jay Vosburgh169a3e62005-06-26 17:54:11 -040044#include <net/ip.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/ip.h>
Jay Vosburgh169a3e62005-06-26 17:54:11 -040046#include <linux/tcp.h>
47#include <linux/udp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#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>
Stephen Hemminger3d632c32009-06-12 19:02:48 +000056#include <linux/io.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070057#include <asm/system.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#include <asm/dma.h>
Stephen Hemminger3d632c32009-06-12 19:02:48 +000059#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070060#include <linux/errno.h>
61#include <linux/netdevice.h>
WANG Congf6dc31a2010-05-06 00:48:51 -070062#include <linux/netpoll.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070063#include <linux/inetdevice.h>
Jay Vosburgha816c7c2007-02-28 17:03:37 -080064#include <linux/igmp.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070065#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>
David Sterbab63bb732007-12-06 23:40:33 -080078#include <linux/jiffies.h>
Jay Vosburghc3ade5c2005-06-26 17:52:20 -040079#include <net/route.h>
Eric W. Biederman457c4cb2007-09-12 12:01:34 +020080#include <net/net_namespace.h>
Eric W. Biedermanec87fd32009-10-29 14:18:26 +000081#include <net/netns/generic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070082#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;
Andy Gospodarekbb1d9122010-06-02 08:40:18 +000093static int tx_queues = BOND_DEFAULT_TX_QUEUES;
Moni Shoua7893b242008-05-17 21:10:12 -070094static int num_grat_arp = 1;
Brian Haley305d5522008-11-04 17:51:14 -080095static int num_unsol_na = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096static int miimon = BOND_LINK_MON_INTERV;
Stephen Hemminger3d632c32009-06-12 19:02:48 +000097static int updelay;
98static int downdelay;
Linus Torvalds1da177e2005-04-16 15:20:36 -070099static int use_carrier = 1;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000100static char *mode;
101static char *primary;
Jiri Pirkoa5499522009-09-25 03:28:09 +0000102static char *primary_reselect;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000103static char *lacp_rate;
104static char *ad_select;
105static char *xmit_hash_policy;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106static int arp_interval = BOND_LINK_ARP_INTERV;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000107static char *arp_ip_target[BOND_MAX_ARP_TARGETS];
108static char *arp_validate;
109static char *fail_over_mac;
Andy Gospodarekebd8e492010-06-02 08:39:21 +0000110static int all_slaves_active = 0;
Stephen Hemmingerd2991f72009-06-12 19:02:44 +0000111static struct bond_params bonding_defaults;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700112
113module_param(max_bonds, int, 0);
114MODULE_PARM_DESC(max_bonds, "Max number of bonded devices");
Andy Gospodarekbb1d9122010-06-02 08:40:18 +0000115module_param(tx_queues, int, 0);
116MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)");
Moni Shoua7893b242008-05-17 21:10:12 -0700117module_param(num_grat_arp, int, 0644);
118MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event");
Brian Haley305d5522008-11-04 17:51:14 -0800119module_param(num_unsol_na, int, 0644);
120MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121module_param(miimon, int, 0);
122MODULE_PARM_DESC(miimon, "Link check interval in milliseconds");
123module_param(updelay, int, 0);
124MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds");
125module_param(downdelay, int, 0);
Mitch Williams2ac47662005-11-09 10:35:03 -0800126MODULE_PARM_DESC(downdelay, "Delay before considering link down, "
127 "in milliseconds");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128module_param(use_carrier, int, 0);
Mitch Williams2ac47662005-11-09 10:35:03 -0800129MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; "
130 "0 for off, 1 for on (default)");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131module_param(mode, charp, 0);
Mitch Williams2ac47662005-11-09 10:35:03 -0800132MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, "
133 "1 for active-backup, 2 for balance-xor, "
134 "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, "
135 "6 for balance-alb");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136module_param(primary, charp, 0);
137MODULE_PARM_DESC(primary, "Primary network device to use");
Jiri Pirkoa5499522009-09-25 03:28:09 +0000138module_param(primary_reselect, charp, 0);
139MODULE_PARM_DESC(primary_reselect, "Reselect primary slave "
140 "once it comes up; "
141 "0 for always (default), "
142 "1 for only if speed of primary is "
143 "better, "
144 "2 for only on active slave "
145 "failure");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146module_param(lacp_rate, charp, 0);
Mitch Williams2ac47662005-11-09 10:35:03 -0800147MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner "
148 "(slow/fast)");
Jay Vosburghfd989c82008-11-04 17:51:16 -0800149module_param(ad_select, charp, 0);
150MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)");
Jay Vosburgh169a3e62005-06-26 17:54:11 -0400151module_param(xmit_hash_policy, charp, 0);
Mitch Williams2ac47662005-11-09 10:35:03 -0800152MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)"
153 ", 1 for layer 3+4");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154module_param(arp_interval, int, 0);
155MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds");
156module_param_array(arp_ip_target, charp, NULL, 0);
157MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form");
Jay Vosburghf5b2b962006-09-22 21:54:53 -0700158module_param(arp_validate, charp, 0);
159MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all");
Jay Vosburgh3915c1e82008-05-17 21:10:14 -0700160module_param(fail_over_mac, charp, 0);
161MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow");
Andy Gospodarekebd8e492010-06-02 08:39:21 +0000162module_param(all_slaves_active, int, 0);
163MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface"
164 "by setting active flag for all slaves. "
165 "0 for never (default), 1 for always.");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
167/*----------------------------- Global variables ----------------------------*/
168
Arjan van de Venf71e1302006-03-03 21:33:57 -0500169static const char * const version =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n";
171
Eric Dumazetf99189b2009-11-17 10:42:49 +0000172int bond_net_id __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000174static __be32 arp_target[BOND_MAX_ARP_TARGETS];
175static int arp_ip_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176static int bond_mode = BOND_MODE_ROUNDROBIN;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000177static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2;
178static int lacp_fast;
Eric Dumazet90e17952010-07-19 06:52:36 +0000179#ifdef CONFIG_NET_POLL_CONTROLLER
Andy Gospodarekc22d7ac2010-06-25 09:50:44 +0000180static int disable_netpoll = 1;
Eric Dumazet90e17952010-07-19 06:52:36 +0000181#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182
Holger Eitzenbergere97fd7c2008-12-09 23:10:38 -0800183const struct bond_parm_tbl bond_lacp_tbl[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{ "slow", AD_LACP_SLOW},
185{ "fast", AD_LACP_FAST},
186{ NULL, -1},
187};
188
Holger Eitzenbergere97fd7c2008-12-09 23:10:38 -0800189const struct bond_parm_tbl bond_mode_tbl[] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190{ "balance-rr", BOND_MODE_ROUNDROBIN},
191{ "active-backup", BOND_MODE_ACTIVEBACKUP},
192{ "balance-xor", BOND_MODE_XOR},
193{ "broadcast", BOND_MODE_BROADCAST},
194{ "802.3ad", BOND_MODE_8023AD},
195{ "balance-tlb", BOND_MODE_TLB},
196{ "balance-alb", BOND_MODE_ALB},
197{ NULL, -1},
198};
199
Holger Eitzenbergere97fd7c2008-12-09 23:10:38 -0800200const struct bond_parm_tbl xmit_hashtype_tbl[] = {
Jay Vosburgh169a3e62005-06-26 17:54:11 -0400201{ "layer2", BOND_XMIT_POLICY_LAYER2},
202{ "layer3+4", BOND_XMIT_POLICY_LAYER34},
Jay Vosburgh6f6652b2007-12-06 23:40:34 -0800203{ "layer2+3", BOND_XMIT_POLICY_LAYER23},
Jay Vosburgh169a3e62005-06-26 17:54:11 -0400204{ NULL, -1},
205};
206
Holger Eitzenbergere97fd7c2008-12-09 23:10:38 -0800207const struct bond_parm_tbl arp_validate_tbl[] = {
Jay Vosburghf5b2b962006-09-22 21:54:53 -0700208{ "none", BOND_ARP_VALIDATE_NONE},
209{ "active", BOND_ARP_VALIDATE_ACTIVE},
210{ "backup", BOND_ARP_VALIDATE_BACKUP},
211{ "all", BOND_ARP_VALIDATE_ALL},
212{ NULL, -1},
213};
214
Holger Eitzenbergere97fd7c2008-12-09 23:10:38 -0800215const struct bond_parm_tbl fail_over_mac_tbl[] = {
Jay Vosburgh3915c1e82008-05-17 21:10:14 -0700216{ "none", BOND_FOM_NONE},
217{ "active", BOND_FOM_ACTIVE},
218{ "follow", BOND_FOM_FOLLOW},
219{ NULL, -1},
220};
221
Jiri Pirkoa5499522009-09-25 03:28:09 +0000222const struct bond_parm_tbl pri_reselect_tbl[] = {
223{ "always", BOND_PRI_RESELECT_ALWAYS},
224{ "better", BOND_PRI_RESELECT_BETTER},
225{ "failure", BOND_PRI_RESELECT_FAILURE},
226{ NULL, -1},
227};
228
Jay Vosburghfd989c82008-11-04 17:51:16 -0800229struct bond_parm_tbl ad_select_tbl[] = {
230{ "stable", BOND_AD_STABLE},
231{ "bandwidth", BOND_AD_BANDWIDTH},
232{ "count", BOND_AD_COUNT},
233{ NULL, -1},
234};
235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236/*-------------------------- Forward declarations ---------------------------*/
237
Jay Vosburghc3ade5c2005-06-26 17:52:20 -0400238static void bond_send_gratuitous_arp(struct bonding *bond);
Stephen Hemminger181470f2009-06-12 19:02:52 +0000239static int bond_init(struct net_device *bond_dev);
Eric W. Biedermanc67dfb22009-10-29 14:18:24 +0000240static void bond_uninit(struct net_device *bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
242/*---------------------------- General routines -----------------------------*/
243
Adrian Bunk4ad072c2007-07-09 11:51:12 -0700244static const char *bond_mode_name(int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
Holger Eitzenberger77afc922008-12-09 23:08:09 -0800246 static const char *names[] = {
247 [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)",
248 [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)",
249 [BOND_MODE_XOR] = "load balancing (xor)",
250 [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)",
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000251 [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation",
Holger Eitzenberger77afc922008-12-09 23:08:09 -0800252 [BOND_MODE_TLB] = "transmit load balancing",
253 [BOND_MODE_ALB] = "adaptive load balancing",
254 };
255
256 if (mode < 0 || mode > BOND_MODE_ALB)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 return "unknown";
Holger Eitzenberger77afc922008-12-09 23:08:09 -0800258
259 return names[mode];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260}
261
262/*---------------------------------- VLAN -----------------------------------*/
263
264/**
265 * bond_add_vlan - add a new vlan id on bond
266 * @bond: bond that got the notification
267 * @vlan_id: the vlan id to add
268 *
269 * Returns -ENOMEM if allocation failed.
270 */
271static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id)
272{
273 struct vlan_entry *vlan;
274
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -0800275 pr_debug("bond: %s, vlan id %d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800276 (bond ? bond->dev->name : "None"), vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277
Brian Haley305d5522008-11-04 17:51:14 -0800278 vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL);
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000279 if (!vlan)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
282 INIT_LIST_HEAD(&vlan->vlan_list);
283 vlan->vlan_id = vlan_id;
284
285 write_lock_bh(&bond->lock);
286
287 list_add_tail(&vlan->vlan_list, &bond->vlan_list);
288
289 write_unlock_bh(&bond->lock);
290
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -0800291 pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
293 return 0;
294}
295
296/**
297 * bond_del_vlan - delete a vlan id from bond
298 * @bond: bond that got the notification
299 * @vlan_id: the vlan id to delete
300 *
301 * returns -ENODEV if @vlan_id was not found in @bond.
302 */
303static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id)
304{
Pavel Emelyanov0883bec2008-05-17 21:10:10 -0700305 struct vlan_entry *vlan;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 int res = -ENODEV;
307
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -0800308 pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310 write_lock_bh(&bond->lock);
311
Pavel Emelyanov0883bec2008-05-17 21:10:10 -0700312 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700313 if (vlan->vlan_id == vlan_id) {
314 list_del(&vlan->vlan_list);
315
Holger Eitzenberger58402052008-12-09 23:07:13 -0800316 if (bond_is_lb(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 bond_alb_clear_vlan(bond, vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800319 pr_debug("removed VLAN ID %d from bond %s\n",
320 vlan_id, bond->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
322 kfree(vlan);
323
324 if (list_empty(&bond->vlan_list) &&
325 (bond->slave_cnt == 0)) {
326 /* Last VLAN removed and no slaves, so
327 * restore block on adding VLANs. This will
328 * be removed once new slaves that are not
329 * VLAN challenged will be added.
330 */
331 bond->dev->features |= NETIF_F_VLAN_CHALLENGED;
332 }
333
334 res = 0;
335 goto out;
336 }
337 }
338
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800339 pr_debug("couldn't find VLAN ID %d in bond %s\n",
340 vlan_id, bond->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341
342out:
343 write_unlock_bh(&bond->lock);
344 return res;
345}
346
347/**
348 * bond_has_challenged_slaves
349 * @bond: the bond we're working on
350 *
351 * Searches the slave list. Returns 1 if a vlan challenged slave
352 * was found, 0 otherwise.
353 *
354 * Assumes bond->lock is held.
355 */
356static int bond_has_challenged_slaves(struct bonding *bond)
357{
358 struct slave *slave;
359 int i;
360
361 bond_for_each_slave(bond, slave, i) {
362 if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -0800363 pr_debug("found VLAN challenged slave - %s\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800364 slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700365 return 1;
366 }
367 }
368
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -0800369 pr_debug("no VLAN challenged slaves found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 return 0;
371}
372
373/**
374 * bond_next_vlan - safely skip to the next item in the vlans list.
375 * @bond: the bond we're working on
376 * @curr: item we're advancing from
377 *
378 * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL,
379 * or @curr->next otherwise (even if it is @curr itself again).
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000380 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 * Caller must hold bond->lock
382 */
383struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr)
384{
385 struct vlan_entry *next, *last;
386
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000387 if (list_empty(&bond->vlan_list))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 if (!curr) {
391 next = list_entry(bond->vlan_list.next,
392 struct vlan_entry, vlan_list);
393 } else {
394 last = list_entry(bond->vlan_list.prev,
395 struct vlan_entry, vlan_list);
396 if (last == curr) {
397 next = list_entry(bond->vlan_list.next,
398 struct vlan_entry, vlan_list);
399 } else {
400 next = list_entry(curr->vlan_list.next,
401 struct vlan_entry, vlan_list);
402 }
403 }
404
405 return next;
406}
407
408/**
409 * bond_dev_queue_xmit - Prepare skb for xmit.
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000410 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 * @bond: bond device that got this skb for tx.
412 * @skb: hw accel VLAN tagged skb to transmit
413 * @slave_dev: slave that is supposed to xmit this skbuff
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000414 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415 * When the bond gets an skb to transmit that is
416 * already hardware accelerated VLAN tagged, and it
417 * needs to relay this skb to a slave that is not
418 * hw accel capable, the skb needs to be "unaccelerated",
419 * i.e. strip the hwaccel tag and re-insert it as part
420 * of the payload.
421 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000422int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb,
423 struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424{
Jay Vosburgh966bc6f2008-03-21 22:29:34 -0700425 unsigned short uninitialized_var(vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426
Jay Vosburghf35188f2010-07-21 12:14:47 +0000427 /* Test vlan_list not vlgrp to catch and handle 802.1p tags */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700428 if (!list_empty(&bond->vlan_list) &&
429 !(slave_dev->features & NETIF_F_HW_VLAN_TX) &&
430 vlan_get_tag(skb, &vlan_id) == 0) {
431 skb->dev = slave_dev;
432 skb = vlan_put_tag(skb, vlan_id);
433 if (!skb) {
434 /* vlan_put_tag() frees the skb in case of error,
435 * so return success here so the calling functions
436 * won't attempt to free is again.
437 */
438 return 0;
439 }
440 } else {
441 skb->dev = slave_dev;
442 }
443
444 skb->priority = 1;
WANG Congf6dc31a2010-05-06 00:48:51 -0700445#ifdef CONFIG_NET_POLL_CONTROLLER
446 if (unlikely(bond->dev->priv_flags & IFF_IN_NETPOLL)) {
447 struct netpoll *np = bond->dev->npinfo->netpoll;
448 slave_dev->npinfo = bond->dev->npinfo;
449 np->real_dev = np->dev = skb->dev;
450 slave_dev->priv_flags |= IFF_IN_NETPOLL;
451 netpoll_send_skb(np, skb);
452 slave_dev->priv_flags &= ~IFF_IN_NETPOLL;
453 np->dev = bond->dev;
454 } else
455#endif
456 dev_queue_xmit(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
458 return 0;
459}
460
461/*
462 * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid
463 * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a
464 * lock because:
465 * a. This operation is performed in IOCTL context,
466 * b. The operation is protected by the RTNL semaphore in the 8021q code,
467 * c. Holding a lock with BH disabled while directly calling a base driver
468 * entry point is generally a BAD idea.
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000469 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470 * The design of synchronization/protection for this operation in the 8021q
471 * module is good for one or more VLAN devices over a single physical device
472 * and cannot be extended for a teaming solution like bonding, so there is a
473 * potential race condition here where a net device from the vlan group might
474 * be referenced (either by a base driver or the 8021q code) while it is being
475 * removed from the system. However, it turns out we're not making matters
476 * worse, and if it works for regular VLAN usage it will work here too.
477*/
478
479/**
480 * bond_vlan_rx_register - Propagates registration to slaves
481 * @bond_dev: bonding net device that got called
482 * @grp: vlan group being registered
483 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000484static void bond_vlan_rx_register(struct net_device *bond_dev,
485 struct vlan_group *grp)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486{
Wang Chen454d7c92008-11-12 23:37:49 -0800487 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 struct slave *slave;
489 int i;
490
Jay Vosburghf35188f2010-07-21 12:14:47 +0000491 write_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700492 bond->vlgrp = grp;
Jay Vosburghf35188f2010-07-21 12:14:47 +0000493 write_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494
495 bond_for_each_slave(bond, slave, i) {
496 struct net_device *slave_dev = slave->dev;
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800497 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
499 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800500 slave_ops->ndo_vlan_rx_register) {
501 slave_ops->ndo_vlan_rx_register(slave_dev, grp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 }
503 }
504}
505
506/**
507 * bond_vlan_rx_add_vid - Propagates adding an id to slaves
508 * @bond_dev: bonding net device that got called
509 * @vid: vlan id being added
510 */
511static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid)
512{
Wang Chen454d7c92008-11-12 23:37:49 -0800513 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 struct slave *slave;
515 int i, res;
516
517 bond_for_each_slave(bond, slave, i) {
518 struct net_device *slave_dev = slave->dev;
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800519 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520
521 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800522 slave_ops->ndo_vlan_rx_add_vid) {
523 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700524 }
525 }
526
527 res = bond_add_vlan(bond, vid);
528 if (res) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800529 pr_err("%s: Error: Failed to add vlan id %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 bond_dev->name, vid);
531 }
532}
533
534/**
535 * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves
536 * @bond_dev: bonding net device that got called
537 * @vid: vlan id being removed
538 */
539static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid)
540{
Wang Chen454d7c92008-11-12 23:37:49 -0800541 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542 struct slave *slave;
543 struct net_device *vlan_dev;
544 int i, res;
545
546 bond_for_each_slave(bond, slave, i) {
547 struct net_device *slave_dev = slave->dev;
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800548 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549
550 if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800551 slave_ops->ndo_vlan_rx_kill_vid) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 /* Save and then restore vlan_dev in the grp array,
553 * since the slave's driver might clear it.
554 */
Dan Aloni5c15bde2007-03-02 20:44:51 -0800555 vlan_dev = vlan_group_get_device(bond->vlgrp, vid);
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800556 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid);
Dan Aloni5c15bde2007-03-02 20:44:51 -0800557 vlan_group_set_device(bond->vlgrp, vid, vlan_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 }
559 }
560
561 res = bond_del_vlan(bond, vid);
562 if (res) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -0800563 pr_err("%s: Error: Failed to remove vlan id %d\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 bond_dev->name, vid);
565 }
566}
567
568static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev)
569{
570 struct vlan_entry *vlan;
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800571 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572
Jay Vosburghf35188f2010-07-21 12:14:47 +0000573 if (!bond->vlgrp)
Jay Vosburgh03dc2f42010-07-21 12:14:48 +0000574 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575
576 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800577 slave_ops->ndo_vlan_rx_register)
578 slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
580 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800581 !(slave_ops->ndo_vlan_rx_add_vid))
Jay Vosburgh03dc2f42010-07-21 12:14:48 +0000582 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800584 list_for_each_entry(vlan, &bond->vlan_list, vlan_list)
585 slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586}
587
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000588static void bond_del_vlans_from_slave(struct bonding *bond,
589 struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590{
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800591 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 struct vlan_entry *vlan;
593 struct net_device *vlan_dev;
594
Jay Vosburghf35188f2010-07-21 12:14:47 +0000595 if (!bond->vlgrp)
Jay Vosburgh03dc2f42010-07-21 12:14:48 +0000596 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597
598 if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) ||
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800599 !(slave_ops->ndo_vlan_rx_kill_vid))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 goto unreg;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Jay Vosburghf35188f2010-07-21 12:14:47 +0000603 if (!vlan->vlan_id)
604 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 /* Save and then restore vlan_dev in the grp array,
606 * since the slave's driver might clear it.
607 */
Dan Aloni5c15bde2007-03-02 20:44:51 -0800608 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800609 slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id);
Dan Aloni5c15bde2007-03-02 20:44:51 -0800610 vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 }
612
613unreg:
614 if ((slave_dev->features & NETIF_F_HW_VLAN_RX) &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800615 slave_ops->ndo_vlan_rx_register)
616 slave_ops->ndo_vlan_rx_register(slave_dev, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700617}
618
619/*------------------------------- Link status -------------------------------*/
620
621/*
Jay Vosburghff59c452006-03-27 13:27:43 -0800622 * Set the carrier state for the master according to the state of its
623 * slaves. If any slaves are up, the master is up. In 802.3ad mode,
624 * do special 802.3ad magic.
625 *
626 * Returns zero if carrier state does not change, nonzero if it does.
627 */
628static int bond_set_carrier(struct bonding *bond)
629{
630 struct slave *slave;
631 int i;
632
633 if (bond->slave_cnt == 0)
634 goto down;
635
636 if (bond->params.mode == BOND_MODE_8023AD)
637 return bond_3ad_set_carrier(bond);
638
639 bond_for_each_slave(bond, slave, i) {
640 if (slave->link == BOND_LINK_UP) {
641 if (!netif_carrier_ok(bond->dev)) {
642 netif_carrier_on(bond->dev);
643 return 1;
644 }
645 return 0;
646 }
647 }
648
649down:
650 if (netif_carrier_ok(bond->dev)) {
651 netif_carrier_off(bond->dev);
652 return 1;
653 }
654 return 0;
655}
656
657/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 * Get link speed and duplex from the slave's base driver
659 * using ethtool. If for some reason the call fails or the
660 * values are invalid, fake speed and duplex to 100/Full
661 * and return error.
662 */
663static int bond_update_speed_duplex(struct slave *slave)
664{
665 struct net_device *slave_dev = slave->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 struct ethtool_cmd etool;
Matthew Wilcox61a44b92007-07-31 14:00:02 -0700667 int res;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700668
669 /* Fake speed and duplex */
670 slave->speed = SPEED_100;
671 slave->duplex = DUPLEX_FULL;
672
Matthew Wilcox61a44b92007-07-31 14:00:02 -0700673 if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675
Matthew Wilcox61a44b92007-07-31 14:00:02 -0700676 res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
677 if (res < 0)
678 return -1;
679
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 switch (etool.speed) {
681 case SPEED_10:
682 case SPEED_100:
683 case SPEED_1000:
Jay Vosburgh94dbffd2006-09-22 21:52:15 -0700684 case SPEED_10000:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 break;
686 default:
687 return -1;
688 }
689
690 switch (etool.duplex) {
691 case DUPLEX_FULL:
692 case DUPLEX_HALF:
693 break;
694 default:
695 return -1;
696 }
697
698 slave->speed = etool.speed;
699 slave->duplex = etool.duplex;
700
701 return 0;
702}
703
704/*
705 * if <dev> supports MII link status reporting, check its link status.
706 *
707 * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(),
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000708 * depending upon the setting of the use_carrier parameter.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700709 *
710 * Return either BMSR_LSTATUS, meaning that the link is up (or we
711 * can't tell and just pretend it is), or 0, meaning that the link is
712 * down.
713 *
714 * If reporting is non-zero, instead of faking link up, return -1 if
715 * both ETHTOOL and MII ioctls fail (meaning the device does not
716 * support them). If use_carrier is set, return whatever it says.
717 * It'd be nice if there was a good way to tell if a driver supports
718 * netif_carrier, but there really isn't.
719 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000720static int bond_check_dev_link(struct bonding *bond,
721 struct net_device *slave_dev, int reporting)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722{
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800723 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Jiri Bohacd9d52832009-10-28 22:23:54 -0700724 int (*ioctl)(struct net_device *, struct ifreq *, int);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 struct ifreq ifr;
726 struct mii_ioctl_data *mii;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727
Petri Gynther6c988852009-08-28 12:05:15 +0000728 if (!reporting && !netif_running(slave_dev))
729 return 0;
730
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800731 if (bond->params.use_carrier)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
Jiri Pirko29112f42009-04-24 01:58:23 +0000734 /* Try to get link status using Ethtool first. */
735 if (slave_dev->ethtool_ops) {
736 if (slave_dev->ethtool_ops->get_link) {
737 u32 link;
738
739 link = slave_dev->ethtool_ops->get_link(slave_dev);
740
741 return link ? BMSR_LSTATUS : 0;
742 }
743 }
744
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000745 /* Ethtool can't be used, fallback to MII ioctls. */
Stephen Hemmingereb7cc592008-11-19 21:56:05 -0800746 ioctl = slave_ops->ndo_do_ioctl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700747 if (ioctl) {
748 /* TODO: set pointer to correct ioctl on a per team member */
749 /* bases to make this more efficient. that is, once */
750 /* we determine the correct ioctl, we will always */
751 /* call it and not the others for that team */
752 /* member. */
753
754 /*
755 * We cannot assume that SIOCGMIIPHY will also read a
756 * register; not all network drivers (e.g., e100)
757 * support that.
758 */
759
760 /* Yes, the mii is overlaid on the ifreq.ifr_ifru */
761 strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
762 mii = if_mii(&ifr);
763 if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) {
764 mii->reg_num = MII_BMSR;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000765 if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0)
766 return mii->val_out & BMSR_LSTATUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768 }
769
Matthew Wilcox61a44b92007-07-31 14:00:02 -0700770 /*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 * If reporting, report that either there's no dev->do_ioctl,
Matthew Wilcox61a44b92007-07-31 14:00:02 -0700772 * or both SIOCGMIIREG and get_link failed (meaning that we
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 * cannot report link status). If not reporting, pretend
774 * we're ok.
775 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000776 return reporting ? -1 : BMSR_LSTATUS;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777}
778
779/*----------------------------- Multicast list ------------------------------*/
780
781/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 * Push the promiscuity flag down to appropriate slaves
783 */
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700784static int bond_set_promiscuity(struct bonding *bond, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700785{
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700786 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700787 if (USES_PRIMARY(bond->params.mode)) {
788 /* write lock already acquired */
789 if (bond->curr_active_slave) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700790 err = dev_set_promiscuity(bond->curr_active_slave->dev,
791 inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700792 }
793 } else {
794 struct slave *slave;
795 int i;
796 bond_for_each_slave(bond, slave, i) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700797 err = dev_set_promiscuity(slave->dev, inc);
798 if (err)
799 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700800 }
801 }
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700802 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803}
804
805/*
806 * Push the allmulti flag down to all slaves
807 */
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700808static int bond_set_allmulti(struct bonding *bond, int inc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809{
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700810 int err = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 if (USES_PRIMARY(bond->params.mode)) {
812 /* write lock already acquired */
813 if (bond->curr_active_slave) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700814 err = dev_set_allmulti(bond->curr_active_slave->dev,
815 inc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 }
817 } else {
818 struct slave *slave;
819 int i;
820 bond_for_each_slave(bond, slave, i) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700821 err = dev_set_allmulti(slave->dev, inc);
822 if (err)
823 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824 }
825 }
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700826 return err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827}
828
829/*
830 * Add a Multicast address to slaves
831 * according to mode
832 */
Jiri Pirko22bedad32010-04-01 21:22:57 +0000833static void bond_mc_add(struct bonding *bond, void *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834{
835 if (USES_PRIMARY(bond->params.mode)) {
836 /* write lock already acquired */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000837 if (bond->curr_active_slave)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000838 dev_mc_add(bond->curr_active_slave->dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 } else {
840 struct slave *slave;
841 int i;
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000842
843 bond_for_each_slave(bond, slave, i)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000844 dev_mc_add(slave->dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 }
846}
847
848/*
849 * Remove a multicast address from slave
850 * according to mode
851 */
Jiri Pirko22bedad32010-04-01 21:22:57 +0000852static void bond_mc_del(struct bonding *bond, void *addr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700853{
854 if (USES_PRIMARY(bond->params.mode)) {
855 /* write lock already acquired */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000856 if (bond->curr_active_slave)
Jiri Pirko22bedad32010-04-01 21:22:57 +0000857 dev_mc_del(bond->curr_active_slave->dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 } else {
859 struct slave *slave;
860 int i;
861 bond_for_each_slave(bond, slave, i) {
Jiri Pirko22bedad32010-04-01 21:22:57 +0000862 dev_mc_del(slave->dev, addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 }
864 }
865}
866
Jay Vosburgha816c7c2007-02-28 17:03:37 -0800867
868/*
869 * Retrieve the list of registered multicast addresses for the bonding
870 * device and retransmit an IGMP JOIN request to the current active
871 * slave.
872 */
873static void bond_resend_igmp_join_requests(struct bonding *bond)
874{
875 struct in_device *in_dev;
876 struct ip_mc_list *im;
877
878 rcu_read_lock();
879 in_dev = __in_dev_get_rcu(bond->dev);
880 if (in_dev) {
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000881 for (im = in_dev->mc_list; im; im = im->next)
Jay Vosburgha816c7c2007-02-28 17:03:37 -0800882 ip_mc_rejoin_group(im);
Jay Vosburgha816c7c2007-02-28 17:03:37 -0800883 }
884
885 rcu_read_unlock();
886}
887
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700889 * flush all members of flush->mc_list from device dev->mc_list
890 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000891static void bond_mc_list_flush(struct net_device *bond_dev,
892 struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893{
Wang Chen454d7c92008-11-12 23:37:49 -0800894 struct bonding *bond = netdev_priv(bond_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +0000895 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896
Jiri Pirko22bedad32010-04-01 21:22:57 +0000897 netdev_for_each_mc_addr(ha, bond_dev)
898 dev_mc_del(slave_dev, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899
900 if (bond->params.mode == BOND_MODE_8023AD) {
901 /* del lacpdu mc addr from mc list */
902 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
903
Jiri Pirko22bedad32010-04-01 21:22:57 +0000904 dev_mc_del(slave_dev, lacpdu_multicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700905 }
906}
907
908/*--------------------------- Active slave change ---------------------------*/
909
910/*
911 * Update the mc list and multicast-related flags for the new and
912 * old active slaves (if any) according to the multicast mode, and
913 * promiscuous flags unconditionally.
914 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000915static void bond_mc_swap(struct bonding *bond, struct slave *new_active,
916 struct slave *old_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917{
Jiri Pirko22bedad32010-04-01 21:22:57 +0000918 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700919
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000920 if (!USES_PRIMARY(bond->params.mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921 /* nothing to do - mc list is already up-to-date on
922 * all slaves
923 */
924 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925
926 if (old_active) {
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000927 if (bond->dev->flags & IFF_PROMISC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928 dev_set_promiscuity(old_active->dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000930 if (bond->dev->flags & IFF_ALLMULTI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 dev_set_allmulti(old_active->dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932
Jiri Pirko22bedad32010-04-01 21:22:57 +0000933 netdev_for_each_mc_addr(ha, bond->dev)
934 dev_mc_del(old_active->dev, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700935 }
936
937 if (new_active) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -0700938 /* FIXME: Signal errors upstream. */
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000939 if (bond->dev->flags & IFF_PROMISC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 dev_set_promiscuity(new_active->dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941
Stephen Hemminger3d632c32009-06-12 19:02:48 +0000942 if (bond->dev->flags & IFF_ALLMULTI)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 dev_set_allmulti(new_active->dev, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944
Jiri Pirko22bedad32010-04-01 21:22:57 +0000945 netdev_for_each_mc_addr(ha, bond->dev)
946 dev_mc_add(new_active->dev, ha->addr);
Jay Vosburgha816c7c2007-02-28 17:03:37 -0800947 bond_resend_igmp_join_requests(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 }
949}
950
Jay Vosburgh3915c1e82008-05-17 21:10:14 -0700951/*
952 * bond_do_fail_over_mac
953 *
954 * Perform special MAC address swapping for fail_over_mac settings
955 *
956 * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh.
957 */
958static void bond_do_fail_over_mac(struct bonding *bond,
959 struct slave *new_active,
960 struct slave *old_active)
Hannes Eder1f78d9f2009-02-14 11:15:33 +0000961 __releases(&bond->curr_slave_lock)
962 __releases(&bond->lock)
963 __acquires(&bond->lock)
964 __acquires(&bond->curr_slave_lock)
Jay Vosburgh3915c1e82008-05-17 21:10:14 -0700965{
966 u8 tmp_mac[ETH_ALEN];
967 struct sockaddr saddr;
968 int rv;
969
970 switch (bond->params.fail_over_mac) {
971 case BOND_FOM_ACTIVE:
972 if (new_active)
973 memcpy(bond->dev->dev_addr, new_active->dev->dev_addr,
974 new_active->dev->addr_len);
975 break;
976 case BOND_FOM_FOLLOW:
977 /*
978 * if new_active && old_active, swap them
979 * if just old_active, do nothing (going to no active slave)
980 * if just new_active, set new_active to bond's MAC
981 */
982 if (!new_active)
983 return;
984
985 write_unlock_bh(&bond->curr_slave_lock);
986 read_unlock(&bond->lock);
987
988 if (old_active) {
989 memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN);
990 memcpy(saddr.sa_data, old_active->dev->dev_addr,
991 ETH_ALEN);
992 saddr.sa_family = new_active->dev->type;
993 } else {
994 memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN);
995 saddr.sa_family = bond->dev->type;
996 }
997
998 rv = dev_set_mac_address(new_active->dev, &saddr);
999 if (rv) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001000 pr_err("%s: Error %d setting MAC of slave %s\n",
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001001 bond->dev->name, -rv, new_active->dev->name);
1002 goto out;
1003 }
1004
1005 if (!old_active)
1006 goto out;
1007
1008 memcpy(saddr.sa_data, tmp_mac, ETH_ALEN);
1009 saddr.sa_family = old_active->dev->type;
1010
1011 rv = dev_set_mac_address(old_active->dev, &saddr);
1012 if (rv)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001013 pr_err("%s: Error %d setting MAC of slave %s\n",
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001014 bond->dev->name, -rv, new_active->dev->name);
1015out:
1016 read_lock(&bond->lock);
1017 write_lock_bh(&bond->curr_slave_lock);
1018 break;
1019 default:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001020 pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n",
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001021 bond->dev->name, bond->params.fail_over_mac);
1022 break;
1023 }
1024
1025}
1026
Jiri Pirkoa5499522009-09-25 03:28:09 +00001027static bool bond_should_change_active(struct bonding *bond)
1028{
1029 struct slave *prim = bond->primary_slave;
1030 struct slave *curr = bond->curr_active_slave;
1031
1032 if (!prim || !curr || curr->link != BOND_LINK_UP)
1033 return true;
1034 if (bond->force_primary) {
1035 bond->force_primary = false;
1036 return true;
1037 }
1038 if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER &&
1039 (prim->speed < curr->speed ||
1040 (prim->speed == curr->speed && prim->duplex <= curr->duplex)))
1041 return false;
1042 if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE)
1043 return false;
1044 return true;
1045}
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001046
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047/**
1048 * find_best_interface - select the best available slave to be the active one
1049 * @bond: our bonding struct
1050 *
1051 * Warning: Caller must hold curr_slave_lock for writing.
1052 */
1053static struct slave *bond_find_best_slave(struct bonding *bond)
1054{
1055 struct slave *new_active, *old_active;
1056 struct slave *bestslave = NULL;
1057 int mintime = bond->params.updelay;
1058 int i;
1059
Nicolas de Pesloüan49b4ad92009-10-07 14:11:00 -07001060 new_active = bond->curr_active_slave;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061
1062 if (!new_active) { /* there were no active slaves left */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001063 if (bond->slave_cnt > 0) /* found one slave */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001064 new_active = bond->first_slave;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001065 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066 return NULL; /* still no slave, return NULL */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001067 }
1068
Linus Torvalds1da177e2005-04-16 15:20:36 -07001069 if ((bond->primary_slave) &&
Jiri Pirkoa5499522009-09-25 03:28:09 +00001070 bond->primary_slave->link == BOND_LINK_UP &&
1071 bond_should_change_active(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001072 new_active = bond->primary_slave;
1073 }
1074
1075 /* remember where to stop iterating over the slaves */
1076 old_active = new_active;
1077
1078 bond_for_each_slave_from(bond, new_active, i, old_active) {
Jiri Pirkob9f60252009-08-31 11:09:38 +00001079 if (new_active->link == BOND_LINK_UP) {
1080 return new_active;
1081 } else if (new_active->link == BOND_LINK_BACK &&
1082 IS_UP(new_active->dev)) {
1083 /* link up, but waiting for stabilization */
1084 if (new_active->delay < mintime) {
1085 mintime = new_active->delay;
1086 bestslave = new_active;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 }
1088 }
1089 }
1090
1091 return bestslave;
1092}
1093
1094/**
1095 * change_active_interface - change the active slave into the specified one
1096 * @bond: our bonding struct
1097 * @new: the new slave to make the active one
1098 *
1099 * Set the new slave to the bond's settings and unset them on the old
1100 * curr_active_slave.
1101 * Setting include flags, mc-list, promiscuity, allmulti, etc.
1102 *
1103 * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP,
1104 * because it is apparently the best available slave we have, even though its
1105 * updelay hasn't timed out yet.
1106 *
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001107 * If new_active is not NULL, caller must hold bond->lock for read and
1108 * curr_slave_lock for write_bh.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 */
Mitch Williamsa77b5322005-11-09 10:35:51 -08001110void bond_change_active_slave(struct bonding *bond, struct slave *new_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111{
1112 struct slave *old_active = bond->curr_active_slave;
1113
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001114 if (old_active == new_active)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001115 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116
1117 if (new_active) {
Jay Vosburghb2220ca2008-05-17 21:10:13 -07001118 new_active->jiffies = jiffies;
1119
Linus Torvalds1da177e2005-04-16 15:20:36 -07001120 if (new_active->link == BOND_LINK_BACK) {
1121 if (USES_PRIMARY(bond->params.mode)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001122 pr_info("%s: making interface %s the new active one %d ms earlier.\n",
1123 bond->dev->name, new_active->dev->name,
1124 (bond->params.updelay - new_active->delay) * bond->params.miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001125 }
1126
1127 new_active->delay = 0;
1128 new_active->link = BOND_LINK_UP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001129
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001130 if (bond->params.mode == BOND_MODE_8023AD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001131 bond_3ad_handle_link_change(new_active, BOND_LINK_UP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132
Holger Eitzenberger58402052008-12-09 23:07:13 -08001133 if (bond_is_lb(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001134 bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001135 } else {
1136 if (USES_PRIMARY(bond->params.mode)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001137 pr_info("%s: making interface %s the new active one.\n",
1138 bond->dev->name, new_active->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001139 }
1140 }
1141 }
1142
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001143 if (USES_PRIMARY(bond->params.mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 bond_mc_swap(bond, new_active, old_active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001145
Holger Eitzenberger58402052008-12-09 23:07:13 -08001146 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 bond_alb_handle_active_change(bond, new_active);
Jay Vosburgh8f903c72006-02-21 16:36:44 -08001148 if (old_active)
1149 bond_set_slave_inactive_flags(old_active);
1150 if (new_active)
1151 bond_set_slave_active_flags(new_active);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152 } else {
1153 bond->curr_active_slave = new_active;
1154 }
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04001155
1156 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) {
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001157 if (old_active)
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04001158 bond_set_slave_inactive_flags(old_active);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04001159
1160 if (new_active) {
1161 bond_set_slave_active_flags(new_active);
Moni Shoua2ab82852007-10-09 19:43:39 -07001162
Or Gerlitz709f8a42008-06-13 18:12:01 -07001163 if (bond->params.fail_over_mac)
1164 bond_do_fail_over_mac(bond, new_active,
1165 old_active);
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001166
Or Gerlitz709f8a42008-06-13 18:12:01 -07001167 bond->send_grat_arp = bond->params.num_grat_arp;
Jay Vosburghb59f9f72008-06-13 18:12:03 -07001168 bond_send_gratuitous_arp(bond);
Or Gerlitz01f31092008-06-13 18:12:02 -07001169
Brian Haley305d5522008-11-04 17:51:14 -08001170 bond->send_unsol_na = bond->params.num_unsol_na;
1171 bond_send_unsolicited_na(bond);
1172
Or Gerlitz01f31092008-06-13 18:12:02 -07001173 write_unlock_bh(&bond->curr_slave_lock);
1174 read_unlock(&bond->lock);
1175
Moni Shoua75c78502009-09-15 02:37:40 -07001176 netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER);
Or Gerlitz01f31092008-06-13 18:12:02 -07001177
1178 read_lock(&bond->lock);
1179 write_lock_bh(&bond->curr_slave_lock);
Moni Shoua7893b242008-05-17 21:10:12 -07001180 }
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04001181 }
Andy Gospodareka2fd9402010-03-25 14:49:05 +00001182
1183 /* resend IGMP joins since all were sent on curr_active_slave */
1184 if (bond->params.mode == BOND_MODE_ROUNDROBIN) {
1185 bond_resend_igmp_join_requests(bond);
1186 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001187}
1188
1189/**
1190 * bond_select_active_slave - select a new active slave, if needed
1191 * @bond: our bonding struct
1192 *
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001193 * This functions should be called when one of the following occurs:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001194 * - The old curr_active_slave has been released or lost its link.
1195 * - The primary_slave has got its link back.
1196 * - A slave has got its link back and there's no old curr_active_slave.
1197 *
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001198 * Caller must hold bond->lock for read and curr_slave_lock for write_bh.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199 */
Mitch Williamsa77b5322005-11-09 10:35:51 -08001200void bond_select_active_slave(struct bonding *bond)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001201{
1202 struct slave *best_slave;
Jay Vosburghff59c452006-03-27 13:27:43 -08001203 int rv;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001204
1205 best_slave = bond_find_best_slave(bond);
1206 if (best_slave != bond->curr_active_slave) {
1207 bond_change_active_slave(bond, best_slave);
Jay Vosburghff59c452006-03-27 13:27:43 -08001208 rv = bond_set_carrier(bond);
1209 if (!rv)
1210 return;
1211
1212 if (netif_carrier_ok(bond->dev)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001213 pr_info("%s: first active interface up!\n",
1214 bond->dev->name);
Jay Vosburghff59c452006-03-27 13:27:43 -08001215 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001216 pr_info("%s: now running without any active interface !\n",
1217 bond->dev->name);
Jay Vosburghff59c452006-03-27 13:27:43 -08001218 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001219 }
1220}
1221
1222/*--------------------------- slave list handling ---------------------------*/
1223
1224/*
1225 * This function attaches the slave to the end of list.
1226 *
1227 * bond->lock held for writing by caller.
1228 */
1229static void bond_attach_slave(struct bonding *bond, struct slave *new_slave)
1230{
1231 if (bond->first_slave == NULL) { /* attaching the first slave */
1232 new_slave->next = new_slave;
1233 new_slave->prev = new_slave;
1234 bond->first_slave = new_slave;
1235 } else {
1236 new_slave->next = bond->first_slave;
1237 new_slave->prev = bond->first_slave->prev;
1238 new_slave->next->prev = new_slave;
1239 new_slave->prev->next = new_slave;
1240 }
1241
1242 bond->slave_cnt++;
1243}
1244
1245/*
1246 * This function detaches the slave from the list.
1247 * WARNING: no check is made to verify if the slave effectively
1248 * belongs to <bond>.
1249 * Nothing is freed on return, structures are just unchained.
1250 * If any slave pointer in bond was pointing to <slave>,
1251 * it should be changed by the calling function.
1252 *
1253 * bond->lock held for writing by caller.
1254 */
1255static void bond_detach_slave(struct bonding *bond, struct slave *slave)
1256{
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001257 if (slave->next)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001258 slave->next->prev = slave->prev;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001260 if (slave->prev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261 slave->prev->next = slave->next;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001262
1263 if (bond->first_slave == slave) { /* slave is the first slave */
1264 if (bond->slave_cnt > 1) { /* there are more slave */
1265 bond->first_slave = slave->next;
1266 } else {
1267 bond->first_slave = NULL; /* slave was the last one */
1268 }
1269 }
1270
1271 slave->next = NULL;
1272 slave->prev = NULL;
1273 bond->slave_cnt--;
1274}
1275
WANG Congf6dc31a2010-05-06 00:48:51 -07001276#ifdef CONFIG_NET_POLL_CONTROLLER
1277/*
1278 * You must hold read lock on bond->lock before calling this.
1279 */
1280static bool slaves_support_netpoll(struct net_device *bond_dev)
1281{
1282 struct bonding *bond = netdev_priv(bond_dev);
1283 struct slave *slave;
1284 int i = 0;
1285 bool ret = true;
1286
1287 bond_for_each_slave(bond, slave, i) {
1288 if ((slave->dev->priv_flags & IFF_DISABLE_NETPOLL) ||
1289 !slave->dev->netdev_ops->ndo_poll_controller)
1290 ret = false;
1291 }
1292 return i != 0 && ret;
1293}
1294
1295static void bond_poll_controller(struct net_device *bond_dev)
1296{
1297 struct net_device *dev = bond_dev->npinfo->netpoll->real_dev;
1298 if (dev != bond_dev)
1299 netpoll_poll_dev(dev);
1300}
1301
1302static void bond_netpoll_cleanup(struct net_device *bond_dev)
1303{
1304 struct bonding *bond = netdev_priv(bond_dev);
1305 struct slave *slave;
1306 const struct net_device_ops *ops;
1307 int i;
1308
1309 read_lock(&bond->lock);
1310 bond_dev->npinfo = NULL;
1311 bond_for_each_slave(bond, slave, i) {
1312 if (slave->dev) {
1313 ops = slave->dev->netdev_ops;
1314 if (ops->ndo_netpoll_cleanup)
1315 ops->ndo_netpoll_cleanup(slave->dev);
1316 else
1317 slave->dev->npinfo = NULL;
1318 }
1319 }
1320 read_unlock(&bond->lock);
1321}
1322
1323#else
1324
1325static void bond_netpoll_cleanup(struct net_device *bond_dev)
1326{
1327}
1328
1329#endif
1330
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331/*---------------------------------- IOCTL ----------------------------------*/
1332
Adrian Bunk4ad072c2007-07-09 11:51:12 -07001333static int bond_sethwaddr(struct net_device *bond_dev,
1334 struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001335{
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001336 pr_debug("bond_dev=%p\n", bond_dev);
1337 pr_debug("slave_dev=%p\n", slave_dev);
1338 pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339 memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len);
1340 return 0;
1341}
1342
Herbert Xu7f353bf2007-08-10 15:47:58 -07001343#define BOND_VLAN_FEATURES \
1344 (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \
1345 NETIF_F_HW_VLAN_FILTER)
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001346
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001347/*
Jay Vosburgh8e3babc2005-11-04 18:45:45 -08001348 * Compute the common dev->feature set available to all slaves. Some
Herbert Xu7f353bf2007-08-10 15:47:58 -07001349 * feature bits are managed elsewhere, so preserve those feature bits
1350 * on the master device.
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001351 */
1352static int bond_compute_features(struct bonding *bond)
1353{
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001354 struct slave *slave;
1355 struct net_device *bond_dev = bond->dev;
Herbert Xu7f353bf2007-08-10 15:47:58 -07001356 unsigned long features = bond_dev->features;
Jay Vosburgh278339a2009-08-28 12:05:12 +00001357 unsigned long vlan_features = 0;
Moni Shoua3158bf72007-10-09 19:43:41 -07001358 unsigned short max_hard_header_len = max((u16)ETH_HLEN,
1359 bond_dev->hard_header_len);
Jay Vosburgh8e3babc2005-11-04 18:45:45 -08001360 int i;
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001361
Herbert Xu7f353bf2007-08-10 15:47:58 -07001362 features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES);
Herbert Xub63365a2008-10-23 01:11:29 -07001363 features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM;
1364
1365 if (!bond->first_slave)
1366 goto done;
1367
1368 features &= ~NETIF_F_ONE_FOR_ALL;
Herbert Xu7f353bf2007-08-10 15:47:58 -07001369
Jay Vosburgh278339a2009-08-28 12:05:12 +00001370 vlan_features = bond->first_slave->dev->vlan_features;
Jay Vosburgh54ef3132006-09-22 21:53:39 -07001371 bond_for_each_slave(bond, slave, i) {
Herbert Xub63365a2008-10-23 01:11:29 -07001372 features = netdev_increment_features(features,
1373 slave->dev->features,
1374 NETIF_F_ONE_FOR_ALL);
Jay Vosburgh278339a2009-08-28 12:05:12 +00001375 vlan_features = netdev_increment_features(vlan_features,
1376 slave->dev->vlan_features,
1377 NETIF_F_ONE_FOR_ALL);
Jay Vosburgh54ef3132006-09-22 21:53:39 -07001378 if (slave->dev->hard_header_len > max_hard_header_len)
1379 max_hard_header_len = slave->dev->hard_header_len;
1380 }
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001381
Herbert Xub63365a2008-10-23 01:11:29 -07001382done:
Herbert Xu7f353bf2007-08-10 15:47:58 -07001383 features |= (bond_dev->features & BOND_VLAN_FEATURES);
Herbert Xub63365a2008-10-23 01:11:29 -07001384 bond_dev->features = netdev_fix_features(features, NULL);
Jay Vosburgh278339a2009-08-28 12:05:12 +00001385 bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL);
Jay Vosburgh54ef3132006-09-22 21:53:39 -07001386 bond_dev->hard_header_len = max_hard_header_len;
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001387
1388 return 0;
1389}
1390
Moni Shoua872254d2007-10-09 19:43:38 -07001391static void bond_setup_by_slave(struct net_device *bond_dev,
1392 struct net_device *slave_dev)
1393{
Wang Chen454d7c92008-11-12 23:37:49 -08001394 struct bonding *bond = netdev_priv(bond_dev);
Moni Shouad90a1622007-10-09 19:43:43 -07001395
Stephen Hemminger00829822008-11-20 20:14:53 -08001396 bond_dev->header_ops = slave_dev->header_ops;
Moni Shoua872254d2007-10-09 19:43:38 -07001397
1398 bond_dev->type = slave_dev->type;
1399 bond_dev->hard_header_len = slave_dev->hard_header_len;
1400 bond_dev->addr_len = slave_dev->addr_len;
1401
1402 memcpy(bond_dev->broadcast, slave_dev->broadcast,
1403 slave_dev->addr_len);
Moni Shouad90a1622007-10-09 19:43:43 -07001404 bond->setup_by_slave = 1;
Moni Shoua872254d2007-10-09 19:43:38 -07001405}
1406
Linus Torvalds1da177e2005-04-16 15:20:36 -07001407/* enslave device <slave> to bond device <master> */
Mitch Williamsa77b5322005-11-09 10:35:51 -08001408int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409{
Wang Chen454d7c92008-11-12 23:37:49 -08001410 struct bonding *bond = netdev_priv(bond_dev);
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08001411 const struct net_device_ops *slave_ops = slave_dev->netdev_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001412 struct slave *new_slave = NULL;
Jiri Pirko22bedad32010-04-01 21:22:57 +00001413 struct netdev_hw_addr *ha;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001414 struct sockaddr addr;
1415 int link_reporting;
1416 int old_features = bond_dev->features;
1417 int res = 0;
1418
nsxfreddy@gmail.com552709d2005-09-21 14:18:04 -05001419 if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL &&
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08001420 slave_ops->ndo_do_ioctl == NULL) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001421 pr_warning("%s: Warning: no link monitoring support for %s\n",
1422 bond_dev->name, slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001423 }
1424
1425 /* bond must be initialized by bond_open() before enslaving */
1426 if (!(bond_dev->flags & IFF_UP)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001427 pr_warning("%s: master_dev is not up in bond_enslave\n",
1428 bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001429 }
1430
1431 /* already enslaved */
1432 if (slave_dev->flags & IFF_SLAVE) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001433 pr_debug("Error, Device was already enslaved\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001434 return -EBUSY;
1435 }
1436
1437 /* vlan challenged mutual exclusion */
1438 /* no need to lock since we're protected by rtnl_lock */
1439 if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001440 pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
Jay Vosburghf35188f2010-07-21 12:14:47 +00001441 if (bond->vlgrp) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001442 pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n",
1443 bond_dev->name, slave_dev->name, bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444 return -EPERM;
1445 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001446 pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n",
1447 bond_dev->name, slave_dev->name,
1448 slave_dev->name, bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001449 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1450 }
1451 } else {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001452 pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453 if (bond->slave_cnt == 0) {
1454 /* First slave, and it is not VLAN challenged,
1455 * so remove the block of adding VLANs over the bond.
1456 */
1457 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1458 }
1459 }
1460
Jay Vosburgh217df672005-09-26 16:11:50 -07001461 /*
1462 * Old ifenslave binaries are no longer supported. These can
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001463 * be identified with moderate accuracy by the state of the slave:
Jay Vosburgh217df672005-09-26 16:11:50 -07001464 * the current ifenslave will set the interface down prior to
1465 * enslaving it; the old ifenslave will not.
1466 */
1467 if ((slave_dev->flags & IFF_UP)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001468 pr_err("%s is up. This may be due to an out of date ifenslave.\n",
Jay Vosburgh217df672005-09-26 16:11:50 -07001469 slave_dev->name);
1470 res = -EPERM;
1471 goto err_undo_flags;
1472 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001473
Moni Shoua872254d2007-10-09 19:43:38 -07001474 /* set bonding device ether type by slave - bonding netdevices are
1475 * created with ether_setup, so when the slave type is not ARPHRD_ETHER
1476 * there is a need to override some of the type dependent attribs/funcs.
1477 *
1478 * bond ether type mutual exclusion - don't allow slaves of dissimilar
1479 * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond
1480 */
1481 if (bond->slave_cnt == 0) {
Moni Shouae36b9d12009-07-15 04:56:31 +00001482 if (bond_dev->type != slave_dev->type) {
Moni Shouae36b9d12009-07-15 04:56:31 +00001483 pr_debug("%s: change device type from %d to %d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001484 bond_dev->name,
1485 bond_dev->type, slave_dev->type);
Moni Shoua75c78502009-09-15 02:37:40 -07001486
Jiri Pirko3ca5b402010-03-10 10:29:35 +00001487 res = netdev_bonding_change(bond_dev,
1488 NETDEV_PRE_TYPE_CHANGE);
1489 res = notifier_to_errno(res);
1490 if (res) {
1491 pr_err("%s: refused to change device type\n",
1492 bond_dev->name);
1493 res = -EBUSY;
1494 goto err_undo_flags;
1495 }
Moni Shoua75c78502009-09-15 02:37:40 -07001496
Jiri Pirko32a806c2010-03-19 04:00:23 +00001497 /* Flush unicast and multicast addresses */
Jiri Pirkoa748ee22010-04-01 21:22:09 +00001498 dev_uc_flush(bond_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00001499 dev_mc_flush(bond_dev);
Jiri Pirko32a806c2010-03-19 04:00:23 +00001500
Moni Shouae36b9d12009-07-15 04:56:31 +00001501 if (slave_dev->type != ARPHRD_ETHER)
1502 bond_setup_by_slave(bond_dev, slave_dev);
1503 else
1504 ether_setup(bond_dev);
Moni Shoua75c78502009-09-15 02:37:40 -07001505
Jiri Pirko93d9b7d2010-03-10 10:28:56 +00001506 netdev_bonding_change(bond_dev,
1507 NETDEV_POST_TYPE_CHANGE);
Moni Shouae36b9d12009-07-15 04:56:31 +00001508 }
Moni Shoua872254d2007-10-09 19:43:38 -07001509 } else if (bond_dev->type != slave_dev->type) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001510 pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n",
1511 slave_dev->name,
1512 slave_dev->type, bond_dev->type);
1513 res = -EINVAL;
1514 goto err_undo_flags;
Moni Shoua872254d2007-10-09 19:43:38 -07001515 }
1516
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08001517 if (slave_ops->ndo_set_mac_address == NULL) {
Moni Shoua2ab82852007-10-09 19:43:39 -07001518 if (bond->slave_cnt == 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001519 pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.",
1520 bond_dev->name);
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001521 bond->params.fail_over_mac = BOND_FOM_ACTIVE;
1522 } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001523 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",
1524 bond_dev->name);
Moni Shoua2ab82852007-10-09 19:43:39 -07001525 res = -EOPNOTSUPP;
1526 goto err_undo_flags;
1527 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001528 }
1529
Jiri Pirkoc20811a2010-05-19 01:14:29 +00001530 /* If this is the first slave, then we need to set the master's hardware
1531 * address to be the same as the slave's. */
1532 if (bond->slave_cnt == 0)
1533 memcpy(bond->dev->dev_addr, slave_dev->dev_addr,
1534 slave_dev->addr_len);
1535
1536
Joe Jin243cb4e2007-02-06 14:16:40 -08001537 new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001538 if (!new_slave) {
1539 res = -ENOMEM;
1540 goto err_undo_flags;
1541 }
1542
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00001543 /*
1544 * Set the new_slave's queue_id to be zero. Queue ID mapping
1545 * is set via sysfs or module option if desired.
1546 */
1547 new_slave->queue_id = 0;
1548
Jiri Pirkob15ba0f2010-05-18 05:42:40 +00001549 /* Save slave's original mtu and then set it to match the bond */
1550 new_slave->original_mtu = slave_dev->mtu;
1551 res = dev_set_mtu(slave_dev, bond->dev->mtu);
1552 if (res) {
1553 pr_debug("Error %d calling dev_set_mtu\n", res);
1554 goto err_free;
1555 }
1556
Jay Vosburgh217df672005-09-26 16:11:50 -07001557 /*
1558 * Save slave's original ("permanent") mac address for modes
1559 * that need it, and for restoring it upon release, and then
1560 * set it to the master's address
1561 */
1562 memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001563
Jay Vosburghdd957c52007-10-09 19:57:24 -07001564 if (!bond->params.fail_over_mac) {
Moni Shoua2ab82852007-10-09 19:43:39 -07001565 /*
1566 * Set slave to master's mac address. The application already
1567 * set the master's mac address to that of the first slave
1568 */
1569 memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
1570 addr.sa_family = slave_dev->type;
1571 res = dev_set_mac_address(slave_dev, &addr);
1572 if (res) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001573 pr_debug("Error %d calling set_mac_address\n", res);
Jiri Pirkob15ba0f2010-05-18 05:42:40 +00001574 goto err_restore_mtu;
Moni Shoua2ab82852007-10-09 19:43:39 -07001575 }
Jay Vosburgh217df672005-09-26 16:11:50 -07001576 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577
Jay Vosburghc2edacf2007-07-09 10:42:47 -07001578 res = netdev_set_master(slave_dev, bond_dev);
1579 if (res) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001580 pr_debug("Error %d calling netdev_set_master\n", res);
Jay Vosburgh569f0c42008-05-02 18:06:02 -07001581 goto err_restore_mac;
Jay Vosburghc2edacf2007-07-09 10:42:47 -07001582 }
Jay Vosburgh217df672005-09-26 16:11:50 -07001583 /* open the slave since the application closed it */
1584 res = dev_open(slave_dev);
1585 if (res) {
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001586 pr_debug("Opening slave %s failed\n", slave_dev->name);
Jay Vosburgh569f0c42008-05-02 18:06:02 -07001587 goto err_unset_master;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 }
1589
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 new_slave->dev = slave_dev;
Jay Vosburgh0b680e72006-09-22 21:54:10 -07001591 slave_dev->priv_flags |= IFF_BONDING;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001592
Holger Eitzenberger58402052008-12-09 23:07:13 -08001593 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001594 /* bond_alb_init_slave() must be called before all other stages since
1595 * it might fail and we do not want to have to undo everything
1596 */
1597 res = bond_alb_init_slave(bond, new_slave);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001598 if (res)
Jay Vosburgh569f0c42008-05-02 18:06:02 -07001599 goto err_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 }
1601
1602 /* If the mode USES_PRIMARY, then the new slave gets the
1603 * master's promisc (and mc) settings only if it becomes the
1604 * curr_active_slave, and that is taken care of later when calling
1605 * bond_change_active()
1606 */
1607 if (!USES_PRIMARY(bond->params.mode)) {
1608 /* set promiscuity level to new slave */
1609 if (bond_dev->flags & IFF_PROMISC) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -07001610 res = dev_set_promiscuity(slave_dev, 1);
1611 if (res)
1612 goto err_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001613 }
1614
1615 /* set allmulti level to new slave */
1616 if (bond_dev->flags & IFF_ALLMULTI) {
Wang Chen7e1a1ac2008-07-14 20:51:36 -07001617 res = dev_set_allmulti(slave_dev, 1);
1618 if (res)
1619 goto err_close;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001620 }
1621
David S. Millerb9e40852008-07-15 00:15:08 -07001622 netif_addr_lock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623 /* upload master's mc_list to new slave */
Jiri Pirko22bedad32010-04-01 21:22:57 +00001624 netdev_for_each_mc_addr(ha, bond_dev)
1625 dev_mc_add(slave_dev, ha->addr);
David S. Millerb9e40852008-07-15 00:15:08 -07001626 netif_addr_unlock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001627 }
1628
1629 if (bond->params.mode == BOND_MODE_8023AD) {
1630 /* add lacpdu mc addr to mc list */
1631 u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR;
1632
Jiri Pirko22bedad32010-04-01 21:22:57 +00001633 dev_mc_add(slave_dev, lacpdu_multicast);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001634 }
1635
1636 bond_add_vlans_on_slave(bond, slave_dev);
1637
1638 write_lock_bh(&bond->lock);
1639
1640 bond_attach_slave(bond, new_slave);
1641
1642 new_slave->delay = 0;
1643 new_slave->link_failure_count = 0;
1644
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001645 bond_compute_features(bond);
1646
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001647 write_unlock_bh(&bond->lock);
1648
1649 read_lock(&bond->lock);
1650
Jay Vosburghf5b2b962006-09-22 21:54:53 -07001651 new_slave->last_arp_rx = jiffies;
1652
Linus Torvalds1da177e2005-04-16 15:20:36 -07001653 if (bond->params.miimon && !bond->params.use_carrier) {
1654 link_reporting = bond_check_dev_link(bond, slave_dev, 1);
1655
1656 if ((link_reporting == -1) && !bond->params.arp_interval) {
1657 /*
1658 * miimon is set but a bonded network driver
1659 * does not support ETHTOOL/MII and
1660 * arp_interval is not set. Note: if
1661 * use_carrier is enabled, we will never go
1662 * here (because netif_carrier is always
1663 * supported); thus, we don't need to change
1664 * the messages for netif_carrier.
1665 */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001666 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",
Mitch Williams4e0952c2005-11-09 10:34:57 -08001667 bond_dev->name, slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001668 } else if (link_reporting == -1) {
1669 /* unable get link status using mii/ethtool */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001670 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",
1671 bond_dev->name, slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001672 }
1673 }
1674
1675 /* check for initial state */
1676 if (!bond->params.miimon ||
1677 (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) {
1678 if (bond->params.updelay) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001679 pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001680 new_slave->link = BOND_LINK_BACK;
1681 new_slave->delay = bond->params.updelay;
1682 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001683 pr_debug("Initial state of slave_dev is BOND_LINK_UP\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001684 new_slave->link = BOND_LINK_UP;
1685 }
1686 new_slave->jiffies = jiffies;
1687 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001688 pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001689 new_slave->link = BOND_LINK_DOWN;
1690 }
1691
1692 if (bond_update_speed_duplex(new_slave) &&
1693 (new_slave->link != BOND_LINK_DOWN)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001694 pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n",
1695 bond_dev->name, new_slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001696
1697 if (bond->params.mode == BOND_MODE_8023AD) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001698 pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n",
1699 bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001700 }
1701 }
1702
1703 if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) {
1704 /* if there is a primary slave, remember it */
Jiri Pirkoa5499522009-09-25 03:28:09 +00001705 if (strcmp(bond->params.primary, new_slave->dev->name) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001706 bond->primary_slave = new_slave;
Jiri Pirkoa5499522009-09-25 03:28:09 +00001707 bond->force_primary = true;
1708 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001709 }
1710
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001711 write_lock_bh(&bond->curr_slave_lock);
1712
Linus Torvalds1da177e2005-04-16 15:20:36 -07001713 switch (bond->params.mode) {
1714 case BOND_MODE_ACTIVEBACKUP:
Jay Vosburgh8a8e4472006-09-22 21:56:15 -07001715 bond_set_slave_inactive_flags(new_slave);
1716 bond_select_active_slave(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 break;
1718 case BOND_MODE_8023AD:
1719 /* in 802.3ad mode, the internal mechanism
1720 * will activate the slaves in the selected
1721 * aggregator
1722 */
1723 bond_set_slave_inactive_flags(new_slave);
1724 /* if this is the first slave */
1725 if (bond->slave_cnt == 1) {
1726 SLAVE_AD_INFO(new_slave).id = 1;
1727 /* Initialize AD with the number of times that the AD timer is called in 1 second
1728 * can be called only after the mac address of the bond is set
1729 */
1730 bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL,
1731 bond->params.lacp_fast);
1732 } else {
1733 SLAVE_AD_INFO(new_slave).id =
1734 SLAVE_AD_INFO(new_slave->prev).id + 1;
1735 }
1736
1737 bond_3ad_bind_slave(new_slave);
1738 break;
1739 case BOND_MODE_TLB:
1740 case BOND_MODE_ALB:
1741 new_slave->state = BOND_STATE_ACTIVE;
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07001742 bond_set_slave_inactive_flags(new_slave);
Jiri Pirko5a29f782009-03-25 17:23:38 -07001743 bond_select_active_slave(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001744 break;
1745 default:
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08001746 pr_debug("This slave is always active in trunk mode\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001747
1748 /* always active in trunk mode */
1749 new_slave->state = BOND_STATE_ACTIVE;
1750
1751 /* In trunking mode there is little meaning to curr_active_slave
1752 * anyway (it holds no special properties of the bond device),
1753 * so we can change it without calling change_active_interface()
1754 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001755 if (!bond->curr_active_slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001756 bond->curr_active_slave = new_slave;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001757
Linus Torvalds1da177e2005-04-16 15:20:36 -07001758 break;
1759 } /* switch(bond_mode) */
1760
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001761 write_unlock_bh(&bond->curr_slave_lock);
1762
Jay Vosburghff59c452006-03-27 13:27:43 -08001763 bond_set_carrier(bond);
1764
WANG Congf6dc31a2010-05-06 00:48:51 -07001765#ifdef CONFIG_NET_POLL_CONTROLLER
Andy Gospodarekc22d7ac2010-06-25 09:50:44 +00001766 /*
1767 * Netpoll and bonding is broken, make sure it is not initialized
1768 * until it is fixed.
1769 */
1770 if (disable_netpoll) {
WANG Congf6dc31a2010-05-06 00:48:51 -07001771 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
Andy Gospodarekc22d7ac2010-06-25 09:50:44 +00001772 } else {
1773 if (slaves_support_netpoll(bond_dev)) {
1774 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
1775 if (bond_dev->npinfo)
1776 slave_dev->npinfo = bond_dev->npinfo;
1777 } else if (!(bond_dev->priv_flags & IFF_DISABLE_NETPOLL)) {
1778 bond_dev->priv_flags |= IFF_DISABLE_NETPOLL;
1779 pr_info("New slave device %s does not support netpoll\n",
1780 slave_dev->name);
1781 pr_info("Disabling netpoll support for %s\n", bond_dev->name);
1782 }
WANG Congf6dc31a2010-05-06 00:48:51 -07001783 }
1784#endif
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001785 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001786
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001787 res = bond_create_slave_symlinks(bond_dev, slave_dev);
1788 if (res)
Jay Vosburgh569f0c42008-05-02 18:06:02 -07001789 goto err_close;
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001790
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001791 pr_info("%s: enslaving %s as a%s interface with a%s link.\n",
1792 bond_dev->name, slave_dev->name,
1793 new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup",
1794 new_slave->link != BOND_LINK_DOWN ? "n up" : " down");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001795
1796 /* enslave is successful */
1797 return 0;
1798
1799/* Undo stages on error */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001800err_close:
1801 dev_close(slave_dev);
1802
Jay Vosburgh569f0c42008-05-02 18:06:02 -07001803err_unset_master:
1804 netdev_set_master(slave_dev, NULL);
1805
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806err_restore_mac:
Jay Vosburghdd957c52007-10-09 19:57:24 -07001807 if (!bond->params.fail_over_mac) {
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001808 /* XXX TODO - fom follow mode needs to change master's
1809 * MAC if this slave's MAC is in use by the bond, or at
1810 * least print a warning.
1811 */
Moni Shoua2ab82852007-10-09 19:43:39 -07001812 memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN);
1813 addr.sa_family = slave_dev->type;
1814 dev_set_mac_address(slave_dev, &addr);
1815 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001816
Jiri Pirkob15ba0f2010-05-18 05:42:40 +00001817err_restore_mtu:
1818 dev_set_mtu(slave_dev, new_slave->original_mtu);
1819
Linus Torvalds1da177e2005-04-16 15:20:36 -07001820err_free:
1821 kfree(new_slave);
1822
1823err_undo_flags:
1824 bond_dev->features = old_features;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001825
Linus Torvalds1da177e2005-04-16 15:20:36 -07001826 return res;
1827}
1828
1829/*
1830 * Try to release the slave device <slave> from the bond device <master>
1831 * It is legal to access curr_active_slave without a lock because all the function
1832 * is write-locked.
1833 *
1834 * The rules for slave state should be:
1835 * for Active/Backup:
1836 * Active stays on all backups go down
1837 * for Bonded connections:
1838 * The first up interface should be left on and all others downed.
1839 */
Mitch Williamsa77b5322005-11-09 10:35:51 -08001840int bond_release(struct net_device *bond_dev, struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001841{
Wang Chen454d7c92008-11-12 23:37:49 -08001842 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001843 struct slave *slave, *oldcurrent;
1844 struct sockaddr addr;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001845
1846 /* slave is not a slave or master is not master of this slave */
1847 if (!(slave_dev->flags & IFF_SLAVE) ||
1848 (slave_dev->master != bond_dev)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001849 pr_err("%s: Error: cannot release %s.\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001850 bond_dev->name, slave_dev->name);
1851 return -EINVAL;
1852 }
1853
WANG Congf6dc31a2010-05-06 00:48:51 -07001854 netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001855 write_lock_bh(&bond->lock);
1856
1857 slave = bond_get_slave_by_dev(bond, slave_dev);
1858 if (!slave) {
1859 /* not a slave of this bond */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001860 pr_info("%s: %s not enslaved\n",
1861 bond_dev->name, slave_dev->name);
Jay Vosburghf5e2a7b2006-02-07 21:17:22 -08001862 write_unlock_bh(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863 return -EINVAL;
1864 }
1865
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07001866 if (!bond->params.fail_over_mac) {
Joe Perches8e95a202009-12-03 07:58:21 +00001867 if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) &&
1868 bond->slave_cnt > 1)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001869 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",
1870 bond_dev->name, slave_dev->name,
1871 slave->perm_hwaddr,
1872 bond_dev->name, slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001873 }
1874
1875 /* Inform AD package of unbinding of slave. */
1876 if (bond->params.mode == BOND_MODE_8023AD) {
1877 /* must be called before the slave is
1878 * detached from the list
1879 */
1880 bond_3ad_unbind_slave(slave);
1881 }
1882
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001883 pr_info("%s: releasing %s interface %s\n",
1884 bond_dev->name,
1885 (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup",
1886 slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001887
1888 oldcurrent = bond->curr_active_slave;
1889
1890 bond->current_arp_slave = NULL;
1891
1892 /* release the slave from its bond */
1893 bond_detach_slave(bond, slave);
1894
Arthur Kepner8531c5f2005-08-23 01:34:53 -04001895 bond_compute_features(bond);
1896
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001897 if (bond->primary_slave == slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001898 bond->primary_slave = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001899
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001900 if (oldcurrent == slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001901 bond_change_active_slave(bond, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001902
Holger Eitzenberger58402052008-12-09 23:07:13 -08001903 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001904 /* Must be called only after the slave has been
1905 * detached from the list and the curr_active_slave
1906 * has been cleared (if our_slave == old_current),
1907 * but before a new active slave is selected.
1908 */
Jay Vosburgh25433312008-01-17 16:24:59 -08001909 write_unlock_bh(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001910 bond_alb_deinit_slave(bond, slave);
Jay Vosburgh25433312008-01-17 16:24:59 -08001911 write_lock_bh(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001912 }
1913
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07001914 if (oldcurrent == slave) {
1915 /*
1916 * Note that we hold RTNL over this sequence, so there
1917 * is no concern that another slave add/remove event
1918 * will interfere.
1919 */
1920 write_unlock_bh(&bond->lock);
1921 read_lock(&bond->lock);
1922 write_lock_bh(&bond->curr_slave_lock);
1923
Linus Torvalds1da177e2005-04-16 15:20:36 -07001924 bond_select_active_slave(bond);
1925
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07001926 write_unlock_bh(&bond->curr_slave_lock);
1927 read_unlock(&bond->lock);
1928 write_lock_bh(&bond->lock);
1929 }
1930
Linus Torvalds1da177e2005-04-16 15:20:36 -07001931 if (bond->slave_cnt == 0) {
Jay Vosburghff59c452006-03-27 13:27:43 -08001932 bond_set_carrier(bond);
1933
Linus Torvalds1da177e2005-04-16 15:20:36 -07001934 /* if the last slave was removed, zero the mac address
1935 * of the master so it will be set by the application
1936 * to the mac address of the first slave
1937 */
1938 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
1939
Jay Vosburghf35188f2010-07-21 12:14:47 +00001940 if (!bond->vlgrp) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001941 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
1942 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001943 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
1944 bond_dev->name, bond_dev->name);
1945 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
1946 bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001947 }
1948 } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) &&
1949 !bond_has_challenged_slaves(bond)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08001950 pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n",
1951 bond_dev->name, slave_dev->name, bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001952 bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED;
1953 }
1954
1955 write_unlock_bh(&bond->lock);
1956
Mitch Williamsb76cdba2005-11-09 10:36:41 -08001957 /* must do this from outside any spinlocks */
1958 bond_destroy_slave_symlinks(bond_dev, slave_dev);
1959
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960 bond_del_vlans_from_slave(bond, slave_dev);
1961
1962 /* If the mode USES_PRIMARY, then we should only remove its
1963 * promisc and mc settings if it was the curr_active_slave, but that was
1964 * already taken care of above when we detached the slave
1965 */
1966 if (!USES_PRIMARY(bond->params.mode)) {
1967 /* unset promiscuity level from slave */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001968 if (bond_dev->flags & IFF_PROMISC)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001969 dev_set_promiscuity(slave_dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001970
1971 /* unset allmulti level from slave */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00001972 if (bond_dev->flags & IFF_ALLMULTI)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001973 dev_set_allmulti(slave_dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974
1975 /* flush master's mc_list from slave */
David S. Millerb9e40852008-07-15 00:15:08 -07001976 netif_addr_lock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001977 bond_mc_list_flush(bond_dev, slave_dev);
David S. Millerb9e40852008-07-15 00:15:08 -07001978 netif_addr_unlock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001979 }
1980
1981 netdev_set_master(slave_dev, NULL);
1982
WANG Congf6dc31a2010-05-06 00:48:51 -07001983#ifdef CONFIG_NET_POLL_CONTROLLER
1984 read_lock_bh(&bond->lock);
Andy Gospodarekc22d7ac2010-06-25 09:50:44 +00001985
1986 /* Make sure netpoll over stays disabled until fixed. */
1987 if (!disable_netpoll)
1988 if (slaves_support_netpoll(bond_dev))
1989 bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL;
WANG Congf6dc31a2010-05-06 00:48:51 -07001990 read_unlock_bh(&bond->lock);
1991 if (slave_dev->netdev_ops->ndo_netpoll_cleanup)
1992 slave_dev->netdev_ops->ndo_netpoll_cleanup(slave_dev);
1993 else
1994 slave_dev->npinfo = NULL;
1995#endif
1996
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997 /* close slave before restoring its mac address */
1998 dev_close(slave_dev);
1999
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07002000 if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) {
Moni Shoua2ab82852007-10-09 19:43:39 -07002001 /* restore original ("permanent") mac address */
2002 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2003 addr.sa_family = slave_dev->type;
2004 dev_set_mac_address(slave_dev, &addr);
2005 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002006
Jiri Pirkob15ba0f2010-05-18 05:42:40 +00002007 dev_set_mtu(slave_dev, slave->original_mtu);
2008
Jay Vosburgh8f903c72006-02-21 16:36:44 -08002009 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002010 IFF_SLAVE_INACTIVE | IFF_BONDING |
2011 IFF_SLAVE_NEEDARP);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002012
2013 kfree(slave);
2014
2015 return 0; /* deletion OK */
2016}
2017
2018/*
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002019* First release a slave and than destroy the bond if no more slaves are left.
Moni Shouad90a1622007-10-09 19:43:43 -07002020* Must be under rtnl_lock when this function is called.
2021*/
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002022int bond_release_and_destroy(struct net_device *bond_dev,
2023 struct net_device *slave_dev)
Moni Shouad90a1622007-10-09 19:43:43 -07002024{
Wang Chen454d7c92008-11-12 23:37:49 -08002025 struct bonding *bond = netdev_priv(bond_dev);
Moni Shouad90a1622007-10-09 19:43:43 -07002026 int ret;
2027
2028 ret = bond_release(bond_dev, slave_dev);
2029 if ((ret == 0) && (bond->slave_cnt == 0)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002030 pr_info("%s: destroying bond %s.\n",
2031 bond_dev->name, bond_dev->name);
Stephen Hemminger9e716262009-06-12 19:02:47 +00002032 unregister_netdevice(bond_dev);
Moni Shouad90a1622007-10-09 19:43:43 -07002033 }
2034 return ret;
2035}
2036
2037/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002038 * This function releases all slaves.
2039 */
2040static int bond_release_all(struct net_device *bond_dev)
2041{
Wang Chen454d7c92008-11-12 23:37:49 -08002042 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002043 struct slave *slave;
2044 struct net_device *slave_dev;
2045 struct sockaddr addr;
2046
2047 write_lock_bh(&bond->lock);
2048
Jay Vosburghff59c452006-03-27 13:27:43 -08002049 netif_carrier_off(bond_dev);
2050
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002051 if (bond->slave_cnt == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002052 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002053
2054 bond->current_arp_slave = NULL;
2055 bond->primary_slave = NULL;
2056 bond_change_active_slave(bond, NULL);
2057
2058 while ((slave = bond->first_slave) != NULL) {
2059 /* Inform AD package of unbinding of slave
2060 * before slave is detached from the list.
2061 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002062 if (bond->params.mode == BOND_MODE_8023AD)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002063 bond_3ad_unbind_slave(slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002064
2065 slave_dev = slave->dev;
2066 bond_detach_slave(bond, slave);
2067
Jay Vosburgh25433312008-01-17 16:24:59 -08002068 /* now that the slave is detached, unlock and perform
2069 * all the undo steps that should not be called from
2070 * within a lock.
2071 */
2072 write_unlock_bh(&bond->lock);
2073
Holger Eitzenberger58402052008-12-09 23:07:13 -08002074 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002075 /* must be called only after the slave
2076 * has been detached from the list
2077 */
2078 bond_alb_deinit_slave(bond, slave);
2079 }
2080
Arthur Kepner8531c5f2005-08-23 01:34:53 -04002081 bond_compute_features(bond);
2082
Mitch Williamsb76cdba2005-11-09 10:36:41 -08002083 bond_destroy_slave_symlinks(bond_dev, slave_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002084 bond_del_vlans_from_slave(bond, slave_dev);
2085
2086 /* If the mode USES_PRIMARY, then we should only remove its
2087 * promisc and mc settings if it was the curr_active_slave, but that was
2088 * already taken care of above when we detached the slave
2089 */
2090 if (!USES_PRIMARY(bond->params.mode)) {
2091 /* unset promiscuity level from slave */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002092 if (bond_dev->flags & IFF_PROMISC)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002093 dev_set_promiscuity(slave_dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094
2095 /* unset allmulti level from slave */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002096 if (bond_dev->flags & IFF_ALLMULTI)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002097 dev_set_allmulti(slave_dev, -1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002098
2099 /* flush master's mc_list from slave */
David S. Millerb9e40852008-07-15 00:15:08 -07002100 netif_addr_lock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002101 bond_mc_list_flush(bond_dev, slave_dev);
David S. Millerb9e40852008-07-15 00:15:08 -07002102 netif_addr_unlock_bh(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002103 }
2104
2105 netdev_set_master(slave_dev, NULL);
2106
2107 /* close slave before restoring its mac address */
2108 dev_close(slave_dev);
2109
Jay Vosburghdd957c52007-10-09 19:57:24 -07002110 if (!bond->params.fail_over_mac) {
Moni Shoua2ab82852007-10-09 19:43:39 -07002111 /* restore original ("permanent") mac address*/
2112 memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN);
2113 addr.sa_family = slave_dev->type;
2114 dev_set_mac_address(slave_dev, &addr);
2115 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002116
Jay Vosburgh8f903c72006-02-21 16:36:44 -08002117 slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB |
2118 IFF_SLAVE_INACTIVE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002119
2120 kfree(slave);
2121
2122 /* re-acquire the lock before getting the next slave */
2123 write_lock_bh(&bond->lock);
2124 }
2125
2126 /* zero the mac address of the master so it will be
2127 * set by the application to the mac address of the
2128 * first slave
2129 */
2130 memset(bond_dev->dev_addr, 0, bond_dev->addr_len);
2131
Jay Vosburghf35188f2010-07-21 12:14:47 +00002132 if (!bond->vlgrp) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002133 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
Jay Vosburghf35188f2010-07-21 12:14:47 +00002134 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002135 pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n",
2136 bond_dev->name, bond_dev->name);
2137 pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n",
2138 bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002139 }
2140
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002141 pr_info("%s: released all slaves\n", bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002142
2143out:
2144 write_unlock_bh(&bond->lock);
2145
2146 return 0;
2147}
2148
2149/*
2150 * This function changes the active slave to slave <slave_dev>.
2151 * It returns -EINVAL in the following cases.
2152 * - <slave_dev> is not found in the list.
2153 * - There is not active slave now.
2154 * - <slave_dev> is already active.
2155 * - The link state of <slave_dev> is not BOND_LINK_UP.
2156 * - <slave_dev> is not running.
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002157 * In these cases, this function does nothing.
2158 * In the other cases, current_slave pointer is changed and 0 is returned.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002159 */
2160static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev)
2161{
Wang Chen454d7c92008-11-12 23:37:49 -08002162 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002163 struct slave *old_active = NULL;
2164 struct slave *new_active = NULL;
2165 int res = 0;
2166
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002167 if (!USES_PRIMARY(bond->params.mode))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002168 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002169
2170 /* Verify that master_dev is indeed the master of slave_dev */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002171 if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002172 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002173
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002174 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002175
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002176 read_lock(&bond->curr_slave_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002177 old_active = bond->curr_active_slave;
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002178 read_unlock(&bond->curr_slave_lock);
2179
Linus Torvalds1da177e2005-04-16 15:20:36 -07002180 new_active = bond_get_slave_by_dev(bond, slave_dev);
2181
2182 /*
2183 * Changing to the current active: do nothing; return success.
2184 */
2185 if (new_active && (new_active == old_active)) {
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002186 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002187 return 0;
2188 }
2189
2190 if ((new_active) &&
2191 (old_active) &&
2192 (new_active->link == BOND_LINK_UP) &&
2193 IS_UP(new_active->dev)) {
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002194 write_lock_bh(&bond->curr_slave_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002195 bond_change_active_slave(bond, new_active);
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002196 write_unlock_bh(&bond->curr_slave_lock);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002197 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07002198 res = -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002199
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002200 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002201
2202 return res;
2203}
2204
Linus Torvalds1da177e2005-04-16 15:20:36 -07002205static int bond_info_query(struct net_device *bond_dev, struct ifbond *info)
2206{
Wang Chen454d7c92008-11-12 23:37:49 -08002207 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002208
2209 info->bond_mode = bond->params.mode;
2210 info->miimon = bond->params.miimon;
2211
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07002212 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002213 info->num_slaves = bond->slave_cnt;
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07002214 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002215
2216 return 0;
2217}
2218
2219static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info)
2220{
Wang Chen454d7c92008-11-12 23:37:49 -08002221 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002222 struct slave *slave;
Eric Dumazet689c96c2009-04-23 03:39:04 +00002223 int i, res = -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002224
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07002225 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002226
2227 bond_for_each_slave(bond, slave, i) {
2228 if (i == (int)info->slave_id) {
Eric Dumazet689c96c2009-04-23 03:39:04 +00002229 res = 0;
2230 strcpy(info->slave_name, slave->dev->name);
2231 info->link = slave->link;
2232 info->state = slave->state;
2233 info->link_failure_count = slave->link_failure_count;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002234 break;
2235 }
2236 }
2237
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07002238 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002239
Eric Dumazet689c96c2009-04-23 03:39:04 +00002240 return res;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002241}
2242
2243/*-------------------------------- Monitoring -------------------------------*/
2244
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002245
2246static int bond_miimon_inspect(struct bonding *bond)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002247{
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002248 struct slave *slave;
2249 int i, link_state, commit = 0;
Jiri Pirko41f89102009-04-24 03:57:29 +00002250 bool ignore_updelay;
2251
2252 ignore_updelay = !bond->curr_active_slave ? true : false;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002253
2254 bond_for_each_slave(bond, slave, i) {
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002255 slave->new_link = BOND_LINK_NOCHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002256
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002257 link_state = bond_check_dev_link(bond, slave->dev, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002258
2259 switch (slave->link) {
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002260 case BOND_LINK_UP:
2261 if (link_state)
2262 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002263
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002264 slave->link = BOND_LINK_FAIL;
2265 slave->delay = bond->params.downdelay;
2266 if (slave->delay) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002267 pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n",
2268 bond->dev->name,
2269 (bond->params.mode ==
2270 BOND_MODE_ACTIVEBACKUP) ?
2271 ((slave->state == BOND_STATE_ACTIVE) ?
2272 "active " : "backup ") : "",
2273 slave->dev->name,
2274 bond->params.downdelay * bond->params.miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002275 }
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002276 /*FALLTHRU*/
2277 case BOND_LINK_FAIL:
2278 if (link_state) {
2279 /*
2280 * recovered before downdelay expired
2281 */
2282 slave->link = BOND_LINK_UP;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002283 slave->jiffies = jiffies;
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002284 pr_info("%s: link status up again after %d ms for interface %s.\n",
2285 bond->dev->name,
2286 (bond->params.downdelay - slave->delay) *
2287 bond->params.miimon,
2288 slave->dev->name);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002289 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002290 }
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002291
2292 if (slave->delay <= 0) {
2293 slave->new_link = BOND_LINK_DOWN;
2294 commit++;
2295 continue;
2296 }
2297
2298 slave->delay--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002299 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002300
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002301 case BOND_LINK_DOWN:
2302 if (!link_state)
2303 continue;
2304
2305 slave->link = BOND_LINK_BACK;
2306 slave->delay = bond->params.updelay;
2307
2308 if (slave->delay) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002309 pr_info("%s: link status up for interface %s, enabling it in %d ms.\n",
2310 bond->dev->name, slave->dev->name,
2311 ignore_updelay ? 0 :
2312 bond->params.updelay *
2313 bond->params.miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002314 }
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002315 /*FALLTHRU*/
2316 case BOND_LINK_BACK:
2317 if (!link_state) {
2318 slave->link = BOND_LINK_DOWN;
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002319 pr_info("%s: link status down again after %d ms for interface %s.\n",
2320 bond->dev->name,
2321 (bond->params.updelay - slave->delay) *
2322 bond->params.miimon,
2323 slave->dev->name);
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002324
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002325 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002326 }
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002327
Jiri Pirko41f89102009-04-24 03:57:29 +00002328 if (ignore_updelay)
2329 slave->delay = 0;
2330
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002331 if (slave->delay <= 0) {
2332 slave->new_link = BOND_LINK_UP;
2333 commit++;
Jiri Pirko41f89102009-04-24 03:57:29 +00002334 ignore_updelay = false;
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002335 continue;
2336 }
2337
2338 slave->delay--;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002339 break;
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002340 }
2341 }
2342
2343 return commit;
2344}
2345
2346static void bond_miimon_commit(struct bonding *bond)
2347{
2348 struct slave *slave;
2349 int i;
2350
2351 bond_for_each_slave(bond, slave, i) {
2352 switch (slave->new_link) {
2353 case BOND_LINK_NOCHANGE:
2354 continue;
2355
2356 case BOND_LINK_UP:
2357 slave->link = BOND_LINK_UP;
2358 slave->jiffies = jiffies;
2359
2360 if (bond->params.mode == BOND_MODE_8023AD) {
2361 /* prevent it from being the active one */
2362 slave->state = BOND_STATE_BACKUP;
2363 } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) {
2364 /* make it immediately active */
2365 slave->state = BOND_STATE_ACTIVE;
2366 } else if (slave != bond->primary_slave) {
2367 /* prevent it from being the active one */
2368 slave->state = BOND_STATE_BACKUP;
2369 }
2370
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002371 pr_info("%s: link status definitely up for interface %s.\n",
2372 bond->dev->name, slave->dev->name);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002373
2374 /* notify ad that the link status has changed */
2375 if (bond->params.mode == BOND_MODE_8023AD)
2376 bond_3ad_handle_link_change(slave, BOND_LINK_UP);
2377
Holger Eitzenberger58402052008-12-09 23:07:13 -08002378 if (bond_is_lb(bond))
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002379 bond_alb_handle_link_change(bond, slave,
2380 BOND_LINK_UP);
2381
2382 if (!bond->curr_active_slave ||
2383 (slave == bond->primary_slave))
2384 goto do_failover;
2385
2386 continue;
2387
2388 case BOND_LINK_DOWN:
Jay Vosburghfba4acd2008-10-30 17:41:14 -07002389 if (slave->link_failure_count < UINT_MAX)
2390 slave->link_failure_count++;
2391
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002392 slave->link = BOND_LINK_DOWN;
2393
2394 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP ||
2395 bond->params.mode == BOND_MODE_8023AD)
2396 bond_set_slave_inactive_flags(slave);
2397
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002398 pr_info("%s: link status definitely down for interface %s, disabling it\n",
2399 bond->dev->name, slave->dev->name);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002400
2401 if (bond->params.mode == BOND_MODE_8023AD)
2402 bond_3ad_handle_link_change(slave,
2403 BOND_LINK_DOWN);
2404
Jiri Pirkoae63e802009-05-27 05:42:36 +00002405 if (bond_is_lb(bond))
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002406 bond_alb_handle_link_change(bond, slave,
2407 BOND_LINK_DOWN);
2408
2409 if (slave == bond->curr_active_slave)
2410 goto do_failover;
2411
2412 continue;
2413
Linus Torvalds1da177e2005-04-16 15:20:36 -07002414 default:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002415 pr_err("%s: invalid new link %d on slave %s\n",
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002416 bond->dev->name, slave->new_link,
2417 slave->dev->name);
2418 slave->new_link = BOND_LINK_NOCHANGE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002419
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002420 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002421 }
2422
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002423do_failover:
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002424 ASSERT_RTNL();
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002425 write_lock_bh(&bond->curr_slave_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002426 bond_select_active_slave(bond);
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002427 write_unlock_bh(&bond->curr_slave_lock);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002428 }
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002429
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002430 bond_set_carrier(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002431}
2432
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002433/*
2434 * bond_mii_monitor
2435 *
2436 * Really a wrapper that splits the mii monitor into two phases: an
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002437 * inspection, then (if inspection indicates something needs to be done)
2438 * an acquisition of appropriate locks followed by a commit phase to
2439 * implement whatever link state changes are indicated.
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002440 */
2441void bond_mii_monitor(struct work_struct *work)
2442{
2443 struct bonding *bond = container_of(work, struct bonding,
2444 mii_work.work);
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002445
2446 read_lock(&bond->lock);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002447 if (bond->kill_timers)
2448 goto out;
2449
2450 if (bond->slave_cnt == 0)
2451 goto re_arm;
Jay Vosburghb59f9f72008-06-13 18:12:03 -07002452
2453 if (bond->send_grat_arp) {
2454 read_lock(&bond->curr_slave_lock);
2455 bond_send_gratuitous_arp(bond);
2456 read_unlock(&bond->curr_slave_lock);
2457 }
2458
Brian Haley305d5522008-11-04 17:51:14 -08002459 if (bond->send_unsol_na) {
2460 read_lock(&bond->curr_slave_lock);
2461 bond_send_unsolicited_na(bond);
2462 read_unlock(&bond->curr_slave_lock);
2463 }
2464
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002465 if (bond_miimon_inspect(bond)) {
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002466 read_unlock(&bond->lock);
2467 rtnl_lock();
2468 read_lock(&bond->lock);
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002469
2470 bond_miimon_commit(bond);
2471
Jay Vosburgh56556622008-01-17 16:25:03 -08002472 read_unlock(&bond->lock);
2473 rtnl_unlock(); /* might sleep, hold no other locks */
2474 read_lock(&bond->lock);
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002475 }
2476
Jay Vosburghf0c76d62008-07-02 18:21:58 -07002477re_arm:
2478 if (bond->params.miimon)
2479 queue_delayed_work(bond->wq, &bond->mii_work,
2480 msecs_to_jiffies(bond->params.miimon));
2481out:
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002482 read_unlock(&bond->lock);
Jay Vosburgh0b0eef62007-10-17 17:37:48 -07002483}
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002484
Al Virod3bb52b2007-08-22 20:06:58 -04002485static __be32 bond_glean_dev_ip(struct net_device *dev)
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002486{
2487 struct in_device *idev;
2488 struct in_ifaddr *ifa;
Al Viroa144ea42006-09-28 18:00:55 -07002489 __be32 addr = 0;
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002490
2491 if (!dev)
2492 return 0;
2493
2494 rcu_read_lock();
Herbert Xue5ed6392005-10-03 14:35:55 -07002495 idev = __in_dev_get_rcu(dev);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002496 if (!idev)
2497 goto out;
2498
2499 ifa = idev->ifa_list;
2500 if (!ifa)
2501 goto out;
2502
2503 addr = ifa->ifa_local;
2504out:
2505 rcu_read_unlock();
2506 return addr;
2507}
2508
Al Virod3bb52b2007-08-22 20:06:58 -04002509static int bond_has_this_ip(struct bonding *bond, __be32 ip)
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002510{
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07002511 struct vlan_entry *vlan;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002512
2513 if (ip == bond->master_ip)
2514 return 1;
2515
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07002516 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002517 if (ip == vlan->vlan_ip)
2518 return 1;
2519 }
2520
2521 return 0;
2522}
2523
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002524/*
2525 * We go to the (large) trouble of VLAN tagging ARP frames because
2526 * switches in VLAN mode (especially if ports are configured as
2527 * "native" to a VLAN) might not pass non-tagged frames.
2528 */
Al Virod3bb52b2007-08-22 20:06:58 -04002529static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id)
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002530{
2531 struct sk_buff *skb;
2532
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002533 pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op,
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002534 slave_dev->name, dest_ip, src_ip, vlan_id);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002535
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002536 skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip,
2537 NULL, slave_dev->dev_addr, NULL);
2538
2539 if (!skb) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002540 pr_err("ARP packet allocation failed\n");
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002541 return;
2542 }
2543 if (vlan_id) {
2544 skb = vlan_put_tag(skb, vlan_id);
2545 if (!skb) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002546 pr_err("failed to insert VLAN tag\n");
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002547 return;
2548 }
2549 }
2550 arp_xmit(skb);
2551}
2552
2553
Linus Torvalds1da177e2005-04-16 15:20:36 -07002554static void bond_arp_send_all(struct bonding *bond, struct slave *slave)
2555{
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002556 int i, vlan_id, rv;
Al Virod3bb52b2007-08-22 20:06:58 -04002557 __be32 *targets = bond->params.arp_targets;
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07002558 struct vlan_entry *vlan;
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002559 struct net_device *vlan_dev;
2560 struct flowi fl;
2561 struct rtable *rt;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002562
Mitch Williams6b780562005-11-09 10:36:19 -08002563 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
2564 if (!targets[i])
Brian Haley5a31bec2009-04-13 00:11:30 -07002565 break;
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002566 pr_debug("basa: target %x\n", targets[i]);
Jay Vosburghf35188f2010-07-21 12:14:47 +00002567 if (!bond->vlgrp) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002568 pr_debug("basa: empty vlan: arp_send\n");
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002569 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2570 bond->master_ip, 0);
2571 continue;
2572 }
2573
2574 /*
2575 * If VLANs are configured, we do a route lookup to
2576 * determine which VLAN interface would be used, so we
2577 * can tag the ARP with the proper VLAN tag.
2578 */
2579 memset(&fl, 0, sizeof(fl));
2580 fl.fl4_dst = targets[i];
2581 fl.fl4_tos = RTO_ONLINK;
2582
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00002583 rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002584 if (rv) {
2585 if (net_ratelimit()) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002586 pr_warning("%s: no route to arp_ip_target %pI4\n",
2587 bond->dev->name, &fl.fl4_dst);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002588 }
2589 continue;
2590 }
2591
2592 /*
2593 * This target is not on a VLAN
2594 */
Changli Gaod8d1f302010-06-10 23:31:35 -07002595 if (rt->dst.dev == bond->dev) {
Jay Vosburghed4b9f82005-09-14 14:52:09 -07002596 ip_rt_put(rt);
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002597 pr_debug("basa: rtdev == bond->dev: arp_send\n");
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002598 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2599 bond->master_ip, 0);
2600 continue;
2601 }
2602
2603 vlan_id = 0;
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07002604 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Dan Aloni5c15bde2007-03-02 20:44:51 -08002605 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
Changli Gaod8d1f302010-06-10 23:31:35 -07002606 if (vlan_dev == rt->dst.dev) {
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002607 vlan_id = vlan->vlan_id;
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002608 pr_debug("basa: vlan match on %s %d\n",
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002609 vlan_dev->name, vlan_id);
2610 break;
2611 }
2612 }
2613
2614 if (vlan_id) {
Jay Vosburghed4b9f82005-09-14 14:52:09 -07002615 ip_rt_put(rt);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002616 bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i],
2617 vlan->vlan_ip, vlan_id);
2618 continue;
2619 }
2620
2621 if (net_ratelimit()) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002622 pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n",
2623 bond->dev->name, &fl.fl4_dst,
Changli Gaod8d1f302010-06-10 23:31:35 -07002624 rt->dst.dev ? rt->dst.dev->name : "NULL");
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002625 }
Jay Vosburghed4b9f82005-09-14 14:52:09 -07002626 ip_rt_put(rt);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002627 }
2628}
2629
2630/*
2631 * Kick out a gratuitous ARP for an IP on the bonding master plus one
2632 * for each VLAN above us.
Jay Vosburghb59f9f72008-06-13 18:12:03 -07002633 *
2634 * Caller must hold curr_slave_lock for read or better
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002635 */
2636static void bond_send_gratuitous_arp(struct bonding *bond)
2637{
2638 struct slave *slave = bond->curr_active_slave;
2639 struct vlan_entry *vlan;
2640 struct net_device *vlan_dev;
2641
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002642 pr_debug("bond_send_grat_arp: bond %s slave %s\n",
2643 bond->dev->name, slave ? slave->dev->name : "NULL");
Jay Vosburghb59f9f72008-06-13 18:12:03 -07002644
2645 if (!slave || !bond->send_grat_arp ||
2646 test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state))
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002647 return;
2648
Jay Vosburghb59f9f72008-06-13 18:12:03 -07002649 bond->send_grat_arp--;
2650
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002651 if (bond->master_ip) {
2652 bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip,
Moni Shoua1053f622007-10-09 19:43:42 -07002653 bond->master_ip, 0);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002654 }
2655
Jay Vosburghf35188f2010-07-21 12:14:47 +00002656 if (!bond->vlgrp)
2657 return;
2658
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002659 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Dan Aloni5c15bde2007-03-02 20:44:51 -08002660 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04002661 if (vlan->vlan_ip) {
2662 bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip,
2663 vlan->vlan_ip, vlan->vlan_id);
2664 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002665 }
2666}
2667
Al Virod3bb52b2007-08-22 20:06:58 -04002668static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip)
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002669{
2670 int i;
Al Virod3bb52b2007-08-22 20:06:58 -04002671 __be32 *targets = bond->params.arp_targets;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002672
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002673 for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002674 pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002675 &sip, &tip, i, &targets[i],
2676 bond_has_this_ip(bond, tip));
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002677 if (sip == targets[i]) {
2678 if (bond_has_this_ip(bond, tip))
2679 slave->last_arp_rx = jiffies;
2680 return;
2681 }
2682 }
2683}
2684
2685static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev)
2686{
2687 struct arphdr *arp;
2688 struct slave *slave;
2689 struct bonding *bond;
2690 unsigned char *arp_ptr;
Al Virod3bb52b2007-08-22 20:06:58 -04002691 __be32 sip, tip;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002692
Andy Gospodarek1f3c8802009-12-14 10:48:58 +00002693 if (dev->priv_flags & IFF_802_1Q_VLAN) {
2694 /*
2695 * When using VLANS and bonding, dev and oriv_dev may be
2696 * incorrect if the physical interface supports VLAN
2697 * acceleration. With this change ARP validation now
2698 * works for hosts only reachable on the VLAN interface.
2699 */
2700 dev = vlan_dev_real_dev(dev);
2701 orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif);
2702 }
2703
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002704 if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER))
2705 goto out;
2706
Wang Chen454d7c92008-11-12 23:37:49 -08002707 bond = netdev_priv(dev);
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002708 read_lock(&bond->lock);
2709
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002710 pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002711 bond->dev->name, skb->dev ? skb->dev->name : "NULL",
2712 orig_dev ? orig_dev->name : "NULL");
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002713
2714 slave = bond_get_slave_by_dev(bond, orig_dev);
2715 if (!slave || !slave_do_arp_validate(bond, slave))
2716 goto out_unlock;
2717
Pavel Emelyanov988b7052008-03-03 12:20:57 -08002718 if (!pskb_may_pull(skb, arp_hdr_len(dev)))
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002719 goto out_unlock;
2720
Arnaldo Carvalho de Melod0a92be2007-03-12 20:56:31 -03002721 arp = arp_hdr(skb);
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002722 if (arp->ar_hln != dev->addr_len ||
2723 skb->pkt_type == PACKET_OTHERHOST ||
2724 skb->pkt_type == PACKET_LOOPBACK ||
2725 arp->ar_hrd != htons(ARPHRD_ETHER) ||
2726 arp->ar_pro != htons(ETH_P_IP) ||
2727 arp->ar_pln != 4)
2728 goto out_unlock;
2729
2730 arp_ptr = (unsigned char *)(arp + 1);
2731 arp_ptr += dev->addr_len;
2732 memcpy(&sip, arp_ptr, 4);
2733 arp_ptr += 4 + dev->addr_len;
2734 memcpy(&tip, arp_ptr, 4);
2735
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08002736 pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002737 bond->dev->name, slave->dev->name, slave->state,
2738 bond->params.arp_validate, slave_do_arp_validate(bond, slave),
2739 &sip, &tip);
Jay Vosburghf5b2b962006-09-22 21:54:53 -07002740
2741 /*
2742 * Backup slaves won't see the ARP reply, but do come through
2743 * here for each ARP probe (so we swap the sip/tip to validate
2744 * the probe). In a "redundant switch, common router" type of
2745 * configuration, the ARP probe will (hopefully) travel from
2746 * the active, through one switch, the router, then the other
2747 * switch before reaching the backup.
2748 */
2749 if (slave->state == BOND_STATE_ACTIVE)
2750 bond_validate_arp(bond, slave, sip, tip);
2751 else
2752 bond_validate_arp(bond, slave, tip, sip);
2753
2754out_unlock:
2755 read_unlock(&bond->lock);
2756out:
2757 dev_kfree_skb(skb);
2758 return NET_RX_SUCCESS;
2759}
2760
Linus Torvalds1da177e2005-04-16 15:20:36 -07002761/*
2762 * this function is called regularly to monitor each slave's link
2763 * ensuring that traffic is being sent and received when arp monitoring
2764 * is used in load-balancing mode. if the adapter has been dormant, then an
2765 * arp is transmitted to generate traffic. see activebackup_arp_monitor for
2766 * arp monitoring in active backup mode.
2767 */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002768void bond_loadbalance_arp_mon(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002769{
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002770 struct bonding *bond = container_of(work, struct bonding,
2771 arp_work.work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002772 struct slave *slave, *oldcurrent;
2773 int do_failover = 0;
2774 int delta_in_ticks;
2775 int i;
2776
2777 read_lock(&bond->lock);
2778
Jay Vosburgh5ce0da82008-05-17 21:10:07 -07002779 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002780
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002781 if (bond->kill_timers)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002782 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002783
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002784 if (bond->slave_cnt == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002785 goto re_arm;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002786
2787 read_lock(&bond->curr_slave_lock);
2788 oldcurrent = bond->curr_active_slave;
2789 read_unlock(&bond->curr_slave_lock);
2790
2791 /* see if any of the previous devices are up now (i.e. they have
2792 * xmt and rcv traffic). the curr_active_slave does not come into
2793 * the picture unless it is null. also, slave->jiffies is not needed
2794 * here because we send an arp on each slave and give a slave as
2795 * long as it needs to get the tx/rx within the delta.
2796 * TODO: what about up/down delay in arp mode? it wasn't here before
2797 * so it can wait
2798 */
2799 bond_for_each_slave(bond, slave, i) {
2800 if (slave->link != BOND_LINK_UP) {
Eric Dumazet9d214932009-05-17 20:55:16 -07002801 if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) &&
David Sterbab63bb732007-12-06 23:40:33 -08002802 time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002803
2804 slave->link = BOND_LINK_UP;
2805 slave->state = BOND_STATE_ACTIVE;
2806
2807 /* primary_slave has no meaning in round-robin
2808 * mode. the window of a slave being up and
2809 * curr_active_slave being null after enslaving
2810 * is closed.
2811 */
2812 if (!oldcurrent) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002813 pr_info("%s: link status definitely up for interface %s, ",
2814 bond->dev->name,
2815 slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002816 do_failover = 1;
2817 } else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002818 pr_info("%s: interface %s is now up\n",
2819 bond->dev->name,
2820 slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002821 }
2822 }
2823 } else {
2824 /* slave->link == BOND_LINK_UP */
2825
2826 /* not all switches will respond to an arp request
2827 * when the source ip is 0, so don't take the link down
2828 * if we don't know our ip yet
2829 */
Eric Dumazet9d214932009-05-17 20:55:16 -07002830 if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) ||
Jay Vosburgh4b8a9232008-05-17 21:10:08 -07002831 (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07002832
2833 slave->link = BOND_LINK_DOWN;
2834 slave->state = BOND_STATE_BACKUP;
2835
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002836 if (slave->link_failure_count < UINT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002837 slave->link_failure_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002838
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002839 pr_info("%s: interface %s is now down.\n",
2840 bond->dev->name,
2841 slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002842
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002843 if (slave == oldcurrent)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002844 do_failover = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002845 }
2846 }
2847
2848 /* note: if switch is in round-robin mode, all links
2849 * must tx arp to ensure all links rx an arp - otherwise
2850 * links may oscillate or not come up at all; if switch is
2851 * in something like xor mode, there is nothing we can
2852 * do - all replies will be rx'ed on same link causing slaves
2853 * to be unstable during low/no traffic periods
2854 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00002855 if (IS_UP(slave->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07002856 bond_arp_send_all(bond, slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002857 }
2858
2859 if (do_failover) {
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002860 write_lock_bh(&bond->curr_slave_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002861
2862 bond_select_active_slave(bond);
2863
Jay Vosburgh059fe7a2007-10-17 17:37:49 -07002864 write_unlock_bh(&bond->curr_slave_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002865 }
2866
2867re_arm:
Jay Vosburgh1b76b312007-10-17 17:37:45 -07002868 if (bond->params.arp_interval)
2869 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002870out:
2871 read_unlock(&bond->lock);
2872}
2873
2874/*
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002875 * Called to inspect slaves for active-backup mode ARP monitor link state
2876 * changes. Sets new_link in slaves to specify what action should take
2877 * place for the slave. Returns 0 if no changes are found, >0 if changes
2878 * to link states must be committed.
2879 *
2880 * Called with bond->lock held for read.
Linus Torvalds1da177e2005-04-16 15:20:36 -07002881 */
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002882static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002883{
Linus Torvalds1da177e2005-04-16 15:20:36 -07002884 struct slave *slave;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002885 int i, commit = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002886
Linus Torvalds1da177e2005-04-16 15:20:36 -07002887 bond_for_each_slave(bond, slave, i) {
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002888 slave->new_link = BOND_LINK_NOCHANGE;
2889
Linus Torvalds1da177e2005-04-16 15:20:36 -07002890 if (slave->link != BOND_LINK_UP) {
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002891 if (time_before_eq(jiffies, slave_last_rx(bond, slave) +
2892 delta_in_ticks)) {
2893 slave->new_link = BOND_LINK_UP;
2894 commit++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002895 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002896
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002897 continue;
2898 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002899
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002900 /*
2901 * Give slaves 2*delta after being enslaved or made
2902 * active. This avoids bouncing, as the last receive
2903 * times need a full ARP monitor cycle to be updated.
2904 */
2905 if (!time_after_eq(jiffies, slave->jiffies +
2906 2 * delta_in_ticks))
2907 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002908
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002909 /*
2910 * Backup slave is down if:
2911 * - No current_arp_slave AND
2912 * - more than 3*delta since last receive AND
2913 * - the bond has an IP address
2914 *
2915 * Note: a non-null current_arp_slave indicates
2916 * the curr_active_slave went down and we are
2917 * searching for a new one; under this condition
2918 * we only take the curr_active_slave down - this
2919 * gives each slave a chance to tx/rx traffic
2920 * before being taken out
2921 */
2922 if (slave->state == BOND_STATE_BACKUP &&
2923 !bond->current_arp_slave &&
2924 time_after(jiffies, slave_last_rx(bond, slave) +
2925 3 * delta_in_ticks)) {
2926 slave->new_link = BOND_LINK_DOWN;
2927 commit++;
2928 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07002929
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002930 /*
2931 * Active slave is down if:
2932 * - more than 2*delta since transmitting OR
2933 * - (more than 2*delta since receive AND
2934 * the bond has an IP address)
2935 */
2936 if ((slave->state == BOND_STATE_ACTIVE) &&
Eric Dumazet9d214932009-05-17 20:55:16 -07002937 (time_after_eq(jiffies, dev_trans_start(slave->dev) +
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002938 2 * delta_in_ticks) ||
2939 (time_after_eq(jiffies, slave_last_rx(bond, slave)
2940 + 2 * delta_in_ticks)))) {
2941 slave->new_link = BOND_LINK_DOWN;
2942 commit++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002943 }
2944 }
2945
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002946 return commit;
2947}
Linus Torvalds1da177e2005-04-16 15:20:36 -07002948
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002949/*
2950 * Called to commit link state changes noted by inspection step of
2951 * active-backup mode ARP monitor.
2952 *
2953 * Called with RTNL and bond->lock for read.
2954 */
2955static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks)
2956{
2957 struct slave *slave;
2958 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002959
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002960 bond_for_each_slave(bond, slave, i) {
2961 switch (slave->new_link) {
2962 case BOND_LINK_NOCHANGE:
2963 continue;
2964
2965 case BOND_LINK_UP:
Jiri Pirkob9f60252009-08-31 11:09:38 +00002966 if ((!bond->curr_active_slave &&
2967 time_before_eq(jiffies,
2968 dev_trans_start(slave->dev) +
2969 delta_in_ticks)) ||
2970 bond->curr_active_slave != slave) {
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002971 slave->link = BOND_LINK_UP;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002972 bond->current_arp_slave = NULL;
2973
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002974 pr_info("%s: link status definitely up for interface %s.\n",
Jiri Pirkob9f60252009-08-31 11:09:38 +00002975 bond->dev->name, slave->dev->name);
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002976
Jiri Pirkob9f60252009-08-31 11:09:38 +00002977 if (!bond->curr_active_slave ||
2978 (slave == bond->primary_slave))
2979 goto do_failover;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002980
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002981 }
2982
Jiri Pirkob9f60252009-08-31 11:09:38 +00002983 continue;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002984
2985 case BOND_LINK_DOWN:
2986 if (slave->link_failure_count < UINT_MAX)
Linus Torvalds1da177e2005-04-16 15:20:36 -07002987 slave->link_failure_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002988
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002989 slave->link = BOND_LINK_DOWN;
Jiri Pirkob9f60252009-08-31 11:09:38 +00002990 bond_set_slave_inactive_flags(slave);
2991
Joe Perchesa4aee5c2009-12-13 20:06:07 -08002992 pr_info("%s: link status definitely down for interface %s, disabling it\n",
Jiri Pirkob9f60252009-08-31 11:09:38 +00002993 bond->dev->name, slave->dev->name);
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002994
2995 if (slave == bond->curr_active_slave) {
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002996 bond->current_arp_slave = NULL;
Jiri Pirkob9f60252009-08-31 11:09:38 +00002997 goto do_failover;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07002998 }
Jiri Pirkob9f60252009-08-31 11:09:38 +00002999
3000 continue;
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003001
3002 default:
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003003 pr_err("%s: impossible: new_link %d on slave %s\n",
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003004 bond->dev->name, slave->new_link,
Linus Torvalds1da177e2005-04-16 15:20:36 -07003005 slave->dev->name);
Jiri Pirkob9f60252009-08-31 11:09:38 +00003006 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003007 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003008
Jiri Pirkob9f60252009-08-31 11:09:38 +00003009do_failover:
3010 ASSERT_RTNL();
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003011 write_lock_bh(&bond->curr_slave_lock);
Jiri Pirkob9f60252009-08-31 11:09:38 +00003012 bond_select_active_slave(bond);
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003013 write_unlock_bh(&bond->curr_slave_lock);
3014 }
3015
3016 bond_set_carrier(bond);
3017}
3018
3019/*
3020 * Send ARP probes for active-backup mode ARP monitor.
3021 *
3022 * Called with bond->lock held for read.
3023 */
3024static void bond_ab_arp_probe(struct bonding *bond)
3025{
3026 struct slave *slave;
3027 int i;
3028
3029 read_lock(&bond->curr_slave_lock);
3030
3031 if (bond->current_arp_slave && bond->curr_active_slave)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003032 pr_info("PROBE: c_arp %s && cas %s BAD\n",
3033 bond->current_arp_slave->dev->name,
3034 bond->curr_active_slave->dev->name);
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003035
3036 if (bond->curr_active_slave) {
3037 bond_arp_send_all(bond, bond->curr_active_slave);
3038 read_unlock(&bond->curr_slave_lock);
3039 return;
3040 }
3041
3042 read_unlock(&bond->curr_slave_lock);
3043
Linus Torvalds1da177e2005-04-16 15:20:36 -07003044 /* if we don't have a curr_active_slave, search for the next available
3045 * backup slave from the current_arp_slave and make it the candidate
3046 * for becoming the curr_active_slave
3047 */
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003048
3049 if (!bond->current_arp_slave) {
3050 bond->current_arp_slave = bond->first_slave;
3051 if (!bond->current_arp_slave)
3052 return;
3053 }
3054
3055 bond_set_slave_inactive_flags(bond->current_arp_slave);
3056
3057 /* search for next candidate */
3058 bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) {
3059 if (IS_UP(slave->dev)) {
3060 slave->link = BOND_LINK_BACK;
3061 bond_set_slave_active_flags(slave);
3062 bond_arp_send_all(bond, slave);
3063 slave->jiffies = jiffies;
3064 bond->current_arp_slave = slave;
3065 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003066 }
3067
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003068 /* if the link state is up at this point, we
3069 * mark it down - this can happen if we have
3070 * simultaneous link failures and
3071 * reselect_active_interface doesn't make this
3072 * one the current slave so it is still marked
3073 * up when it is actually down
3074 */
3075 if (slave->link == BOND_LINK_UP) {
3076 slave->link = BOND_LINK_DOWN;
3077 if (slave->link_failure_count < UINT_MAX)
3078 slave->link_failure_count++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003079
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003080 bond_set_slave_inactive_flags(slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003081
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003082 pr_info("%s: backup interface %s is now down.\n",
3083 bond->dev->name, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003084 }
3085 }
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003086}
3087
3088void bond_activebackup_arp_mon(struct work_struct *work)
3089{
3090 struct bonding *bond = container_of(work, struct bonding,
3091 arp_work.work);
3092 int delta_in_ticks;
3093
3094 read_lock(&bond->lock);
3095
3096 if (bond->kill_timers)
3097 goto out;
3098
3099 delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval);
3100
3101 if (bond->slave_cnt == 0)
3102 goto re_arm;
3103
Jay Vosburghb59f9f72008-06-13 18:12:03 -07003104 if (bond->send_grat_arp) {
3105 read_lock(&bond->curr_slave_lock);
3106 bond_send_gratuitous_arp(bond);
3107 read_unlock(&bond->curr_slave_lock);
3108 }
3109
Brian Haley305d5522008-11-04 17:51:14 -08003110 if (bond->send_unsol_na) {
3111 read_lock(&bond->curr_slave_lock);
3112 bond_send_unsolicited_na(bond);
3113 read_unlock(&bond->curr_slave_lock);
3114 }
3115
Jay Vosburghb2220ca2008-05-17 21:10:13 -07003116 if (bond_ab_arp_inspect(bond, delta_in_ticks)) {
3117 read_unlock(&bond->lock);
3118 rtnl_lock();
3119 read_lock(&bond->lock);
3120
3121 bond_ab_arp_commit(bond, delta_in_ticks);
3122
3123 read_unlock(&bond->lock);
3124 rtnl_unlock();
3125 read_lock(&bond->lock);
3126 }
3127
3128 bond_ab_arp_probe(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003129
3130re_arm:
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003131 if (bond->params.arp_interval)
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003132 queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003133out:
3134 read_unlock(&bond->lock);
3135}
3136
3137/*------------------------------ proc/seq_file-------------------------------*/
3138
3139#ifdef CONFIG_PROC_FS
3140
Linus Torvalds1da177e2005-04-16 15:20:36 -07003141static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos)
Hannes Eder1f78d9f2009-02-14 11:15:33 +00003142 __acquires(&dev_base_lock)
3143 __acquires(&bond->lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003144{
3145 struct bonding *bond = seq->private;
3146 loff_t off = 0;
3147 struct slave *slave;
3148 int i;
3149
3150 /* make sure the bond won't be taken away */
3151 read_lock(&dev_base_lock);
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07003152 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003153
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003154 if (*pos == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003155 return SEQ_START_TOKEN;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003156
3157 bond_for_each_slave(bond, slave, i) {
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003158 if (++off == *pos)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003159 return slave;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003160 }
3161
3162 return NULL;
3163}
3164
3165static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos)
3166{
3167 struct bonding *bond = seq->private;
3168 struct slave *slave = v;
3169
3170 ++*pos;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003171 if (v == SEQ_START_TOKEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003172 return bond->first_slave;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003173
3174 slave = slave->next;
3175
3176 return (slave == bond->first_slave) ? NULL : slave;
3177}
3178
3179static void bond_info_seq_stop(struct seq_file *seq, void *v)
Hannes Eder1f78d9f2009-02-14 11:15:33 +00003180 __releases(&bond->lock)
3181 __releases(&dev_base_lock)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003182{
3183 struct bonding *bond = seq->private;
3184
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07003185 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003186 read_unlock(&dev_base_lock);
3187}
3188
3189static void bond_info_show_master(struct seq_file *seq)
3190{
3191 struct bonding *bond = seq->private;
3192 struct slave *curr;
Mitch Williams4756b022005-11-09 10:36:25 -08003193 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003194
3195 read_lock(&bond->curr_slave_lock);
3196 curr = bond->curr_active_slave;
3197 read_unlock(&bond->curr_slave_lock);
3198
Jay Vosburghdd957c52007-10-09 19:57:24 -07003199 seq_printf(seq, "Bonding Mode: %s",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003200 bond_mode_name(bond->params.mode));
3201
Jay Vosburghdd957c52007-10-09 19:57:24 -07003202 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP &&
3203 bond->params.fail_over_mac)
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07003204 seq_printf(seq, " (fail_over_mac %s)",
3205 fail_over_mac_tbl[bond->params.fail_over_mac].modename);
Jay Vosburghdd957c52007-10-09 19:57:24 -07003206
3207 seq_printf(seq, "\n");
3208
Mitch Williamsc61b75a2005-11-09 10:35:13 -08003209 if (bond->params.mode == BOND_MODE_XOR ||
3210 bond->params.mode == BOND_MODE_8023AD) {
3211 seq_printf(seq, "Transmit Hash Policy: %s (%d)\n",
3212 xmit_hashtype_tbl[bond->params.xmit_policy].modename,
3213 bond->params.xmit_policy);
3214 }
3215
Linus Torvalds1da177e2005-04-16 15:20:36 -07003216 if (USES_PRIMARY(bond->params.mode)) {
Jiri Pirkoa5499522009-09-25 03:28:09 +00003217 seq_printf(seq, "Primary Slave: %s",
Mitch Williams0f418b22005-11-09 10:35:21 -08003218 (bond->primary_slave) ?
3219 bond->primary_slave->dev->name : "None");
Jiri Pirkoa5499522009-09-25 03:28:09 +00003220 if (bond->primary_slave)
3221 seq_printf(seq, " (primary_reselect %s)",
3222 pri_reselect_tbl[bond->params.primary_reselect].modename);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003223
Jiri Pirkoa5499522009-09-25 03:28:09 +00003224 seq_printf(seq, "\nCurrently Active Slave: %s\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003225 (curr) ? curr->dev->name : "None");
3226 }
3227
Jay Vosburghff59c452006-03-27 13:27:43 -08003228 seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ?
3229 "up" : "down");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003230 seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon);
3231 seq_printf(seq, "Up Delay (ms): %d\n",
3232 bond->params.updelay * bond->params.miimon);
3233 seq_printf(seq, "Down Delay (ms): %d\n",
3234 bond->params.downdelay * bond->params.miimon);
3235
Mitch Williams4756b022005-11-09 10:36:25 -08003236
3237 /* ARP information */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003238 if (bond->params.arp_interval > 0) {
3239 int printed = 0;
Mitch Williams4756b022005-11-09 10:36:25 -08003240 seq_printf(seq, "ARP Polling Interval (ms): %d\n",
3241 bond->params.arp_interval);
3242
3243 seq_printf(seq, "ARP IP target/s (n.n.n.n form):");
3244
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003245 for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) {
Mitch Williams4756b022005-11-09 10:36:25 -08003246 if (!bond->params.arp_targets[i])
Brian Haley5a31bec2009-04-13 00:11:30 -07003247 break;
Mitch Williams4756b022005-11-09 10:36:25 -08003248 if (printed)
3249 seq_printf(seq, ",");
Harvey Harrison8cf14e32008-10-29 22:43:33 -07003250 seq_printf(seq, " %pI4", &bond->params.arp_targets[i]);
Mitch Williams4756b022005-11-09 10:36:25 -08003251 printed = 1;
3252 }
3253 seq_printf(seq, "\n");
3254 }
3255
Linus Torvalds1da177e2005-04-16 15:20:36 -07003256 if (bond->params.mode == BOND_MODE_8023AD) {
3257 struct ad_info ad_info;
3258
3259 seq_puts(seq, "\n802.3ad info\n");
3260 seq_printf(seq, "LACP rate: %s\n",
3261 (bond->params.lacp_fast) ? "fast" : "slow");
Jay Vosburghfd989c82008-11-04 17:51:16 -08003262 seq_printf(seq, "Aggregator selection policy (ad_select): %s\n",
3263 ad_select_tbl[bond->params.ad_select].modename);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003264
3265 if (bond_3ad_get_active_agg_info(bond, &ad_info)) {
3266 seq_printf(seq, "bond %s has no active aggregator\n",
3267 bond->dev->name);
3268 } else {
3269 seq_printf(seq, "Active Aggregator Info:\n");
3270
3271 seq_printf(seq, "\tAggregator ID: %d\n",
3272 ad_info.aggregator_id);
3273 seq_printf(seq, "\tNumber of ports: %d\n",
3274 ad_info.ports);
3275 seq_printf(seq, "\tActor Key: %d\n",
3276 ad_info.actor_key);
3277 seq_printf(seq, "\tPartner Key: %d\n",
3278 ad_info.partner_key);
Johannes Berge1749612008-10-27 15:59:26 -07003279 seq_printf(seq, "\tPartner Mac Address: %pM\n",
3280 ad_info.partner_system);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003281 }
3282 }
3283}
3284
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003285static void bond_info_show_slave(struct seq_file *seq,
3286 const struct slave *slave)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003287{
3288 struct bonding *bond = seq->private;
3289
3290 seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name);
3291 seq_printf(seq, "MII Status: %s\n",
3292 (slave->link == BOND_LINK_UP) ? "up" : "down");
Kenzo Iwami655096452006-09-22 21:53:08 -07003293 seq_printf(seq, "Link Failure Count: %u\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07003294 slave->link_failure_count);
3295
Johannes Berge1749612008-10-27 15:59:26 -07003296 seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003297
3298 if (bond->params.mode == BOND_MODE_8023AD) {
3299 const struct aggregator *agg
3300 = SLAVE_AD_INFO(slave).port.aggregator;
3301
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003302 if (agg)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003303 seq_printf(seq, "Aggregator ID: %d\n",
3304 agg->aggregator_identifier);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003305 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07003306 seq_puts(seq, "Aggregator ID: N/A\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003307 }
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00003308 seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003309}
3310
3311static int bond_info_seq_show(struct seq_file *seq, void *v)
3312{
3313 if (v == SEQ_START_TOKEN) {
3314 seq_printf(seq, "%s\n", version);
3315 bond_info_show_master(seq);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003316 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -07003317 bond_info_show_slave(seq, v);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003318
3319 return 0;
3320}
3321
Jan Engelhardt4101dec2009-01-14 13:52:18 -08003322static const struct seq_operations bond_info_seq_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003323 .start = bond_info_seq_start,
3324 .next = bond_info_seq_next,
3325 .stop = bond_info_seq_stop,
3326 .show = bond_info_seq_show,
3327};
3328
3329static int bond_info_open(struct inode *inode, struct file *file)
3330{
3331 struct seq_file *seq;
3332 struct proc_dir_entry *proc;
3333 int res;
3334
3335 res = seq_open(file, &bond_info_seq_ops);
3336 if (!res) {
3337 /* recover the pointer buried in proc_dir_entry data */
3338 seq = file->private_data;
3339 proc = PDE(inode);
3340 seq->private = proc->data;
3341 }
3342
3343 return res;
3344}
3345
Arjan van de Vend54b1fd2007-02-12 00:55:34 -08003346static const struct file_operations bond_info_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003347 .owner = THIS_MODULE,
3348 .open = bond_info_open,
3349 .read = seq_read,
3350 .llseek = seq_lseek,
3351 .release = seq_release,
3352};
3353
Nicolas de Pesloüan38fc0022009-10-13 00:45:06 -07003354static void bond_create_proc_entry(struct bonding *bond)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003355{
3356 struct net_device *bond_dev = bond->dev;
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003357 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003358
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003359 if (bn->proc_dir) {
Denis V. Luneva95609c2008-04-29 01:02:29 -07003360 bond->proc_entry = proc_create_data(bond_dev->name,
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003361 S_IRUGO, bn->proc_dir,
Denis V. Luneva95609c2008-04-29 01:02:29 -07003362 &bond_info_fops, bond);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003363 if (bond->proc_entry == NULL)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003364 pr_warning("Warning: Cannot create /proc/net/%s/%s\n",
3365 DRV_NAME, bond_dev->name);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003366 else
Linus Torvalds1da177e2005-04-16 15:20:36 -07003367 memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003368 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07003369}
3370
3371static void bond_remove_proc_entry(struct bonding *bond)
3372{
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003373 struct net_device *bond_dev = bond->dev;
3374 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
3375
3376 if (bn->proc_dir && bond->proc_entry) {
3377 remove_proc_entry(bond->proc_file_name, bn->proc_dir);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003378 memset(bond->proc_file_name, 0, IFNAMSIZ);
3379 bond->proc_entry = NULL;
3380 }
3381}
3382
3383/* Create the bonding directory under /proc/net, if doesn't exist yet.
3384 * Caller must hold rtnl_lock.
3385 */
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003386static void __net_init bond_create_proc_dir(struct bond_net *bn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003387{
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003388 if (!bn->proc_dir) {
3389 bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net);
3390 if (!bn->proc_dir)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003391 pr_warning("Warning: cannot create /proc/net/%s\n",
3392 DRV_NAME);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003393 }
3394}
3395
3396/* Destroy the bonding directory under /proc/net, if empty.
3397 * Caller must hold rtnl_lock.
3398 */
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003399static void __net_exit bond_destroy_proc_dir(struct bond_net *bn)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003400{
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003401 if (bn->proc_dir) {
3402 remove_proc_entry(DRV_NAME, bn->net->proc_net);
3403 bn->proc_dir = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003404 }
3405}
Jiri Pirkoaee64fa2009-05-05 06:20:51 +00003406
3407#else /* !CONFIG_PROC_FS */
3408
Nicolas de Pesloüan38fc0022009-10-13 00:45:06 -07003409static void bond_create_proc_entry(struct bonding *bond)
Jiri Pirkoaee64fa2009-05-05 06:20:51 +00003410{
3411}
3412
3413static void bond_remove_proc_entry(struct bonding *bond)
3414{
3415}
3416
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003417static inline void bond_create_proc_dir(struct bond_net *bn)
Jiri Pirkoaee64fa2009-05-05 06:20:51 +00003418{
3419}
3420
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00003421static inline void bond_destroy_proc_dir(struct bond_net *bn)
Jiri Pirkoaee64fa2009-05-05 06:20:51 +00003422{
3423}
3424
Linus Torvalds1da177e2005-04-16 15:20:36 -07003425#endif /* CONFIG_PROC_FS */
3426
Jiri Pirkoaee64fa2009-05-05 06:20:51 +00003427
Linus Torvalds1da177e2005-04-16 15:20:36 -07003428/*-------------------------- netdev event handling --------------------------*/
3429
3430/*
3431 * Change device name
3432 */
3433static int bond_event_changename(struct bonding *bond)
3434{
Linus Torvalds1da177e2005-04-16 15:20:36 -07003435 bond_remove_proc_entry(bond);
3436 bond_create_proc_entry(bond);
Stephen Hemminger7e083842009-06-12 19:02:46 +00003437
Linus Torvalds1da177e2005-04-16 15:20:36 -07003438 return NOTIFY_DONE;
3439}
3440
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003441static int bond_master_netdev_event(unsigned long event,
3442 struct net_device *bond_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003443{
Wang Chen454d7c92008-11-12 23:37:49 -08003444 struct bonding *event_bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003445
3446 switch (event) {
3447 case NETDEV_CHANGENAME:
3448 return bond_event_changename(event_bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003449 default:
3450 break;
3451 }
3452
3453 return NOTIFY_DONE;
3454}
3455
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003456static int bond_slave_netdev_event(unsigned long event,
3457 struct net_device *slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003458{
3459 struct net_device *bond_dev = slave_dev->master;
Wang Chen454d7c92008-11-12 23:37:49 -08003460 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003461
3462 switch (event) {
3463 case NETDEV_UNREGISTER:
3464 if (bond_dev) {
Jay Vosburgh1284cd32007-10-15 16:44:27 -07003465 if (bond->setup_by_slave)
3466 bond_release_and_destroy(bond_dev, slave_dev);
3467 else
3468 bond_release(bond_dev, slave_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003469 }
3470 break;
3471 case NETDEV_CHANGE:
Jay Vosburgh17d04502009-03-18 18:38:25 -07003472 if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) {
3473 struct slave *slave;
3474
3475 slave = bond_get_slave_by_dev(bond, slave_dev);
3476 if (slave) {
3477 u16 old_speed = slave->speed;
3478 u16 old_duplex = slave->duplex;
3479
3480 bond_update_speed_duplex(slave);
3481
3482 if (bond_is_lb(bond))
3483 break;
3484
3485 if (old_speed != slave->speed)
3486 bond_3ad_adapter_speed_changed(slave);
3487 if (old_duplex != slave->duplex)
3488 bond_3ad_adapter_duplex_changed(slave);
3489 }
3490 }
3491
Linus Torvalds1da177e2005-04-16 15:20:36 -07003492 break;
3493 case NETDEV_DOWN:
3494 /*
3495 * ... Or is it this?
3496 */
3497 break;
3498 case NETDEV_CHANGEMTU:
3499 /*
3500 * TODO: Should slaves be allowed to
3501 * independently alter their MTU? For
3502 * an active-backup bond, slaves need
3503 * not be the same type of device, so
3504 * MTUs may vary. For other modes,
3505 * slaves arguably should have the
3506 * same MTUs. To do this, we'd need to
3507 * take over the slave's change_mtu
3508 * function for the duration of their
3509 * servitude.
3510 */
3511 break;
3512 case NETDEV_CHANGENAME:
3513 /*
3514 * TODO: handle changing the primary's name
3515 */
3516 break;
Arthur Kepner8531c5f2005-08-23 01:34:53 -04003517 case NETDEV_FEAT_CHANGE:
3518 bond_compute_features(bond);
3519 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003520 default:
3521 break;
3522 }
3523
3524 return NOTIFY_DONE;
3525}
3526
3527/*
3528 * bond_netdev_event: handle netdev notifier chain events.
3529 *
3530 * This function receives events for the netdev chain. The caller (an
Alan Sterne041c682006-03-27 01:16:30 -08003531 * ioctl handler calling blocking_notifier_call_chain) holds the necessary
Linus Torvalds1da177e2005-04-16 15:20:36 -07003532 * locks for us to safely manipulate the slave devices (RTNL lock,
3533 * dev_probe_lock).
3534 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003535static int bond_netdev_event(struct notifier_block *this,
3536 unsigned long event, void *ptr)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003537{
3538 struct net_device *event_dev = (struct net_device *)ptr;
3539
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08003540 pr_debug("event_dev: %s, event: %lx\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003541 event_dev ? event_dev->name : "None",
3542 event);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003543
Jay Vosburgh0b680e72006-09-22 21:54:10 -07003544 if (!(event_dev->priv_flags & IFF_BONDING))
3545 return NOTIFY_DONE;
3546
Linus Torvalds1da177e2005-04-16 15:20:36 -07003547 if (event_dev->flags & IFF_MASTER) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08003548 pr_debug("IFF_MASTER\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003549 return bond_master_netdev_event(event, event_dev);
3550 }
3551
3552 if (event_dev->flags & IFF_SLAVE) {
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08003553 pr_debug("IFF_SLAVE\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07003554 return bond_slave_netdev_event(event, event_dev);
3555 }
3556
3557 return NOTIFY_DONE;
3558}
3559
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04003560/*
3561 * bond_inetaddr_event: handle inetaddr notifier chain events.
3562 *
3563 * We keep track of device IPs primarily to use as source addresses in
3564 * ARP monitor probes (rather than spewing out broadcasts all the time).
3565 *
3566 * We track one IP for the main device (if it has one), plus one per VLAN.
3567 */
3568static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr)
3569{
3570 struct in_ifaddr *ifa = ptr;
3571 struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev;
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003572 struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id);
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07003573 struct bonding *bond;
3574 struct vlan_entry *vlan;
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04003575
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003576 list_for_each_entry(bond, &bn->dev_list, bond_list) {
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04003577 if (bond->dev == event_dev) {
3578 switch (event) {
3579 case NETDEV_UP:
3580 bond->master_ip = ifa->ifa_local;
3581 return NOTIFY_OK;
3582 case NETDEV_DOWN:
3583 bond->master_ip = bond_glean_dev_ip(bond->dev);
3584 return NOTIFY_OK;
3585 default:
3586 return NOTIFY_DONE;
3587 }
3588 }
3589
Pavel Emelyanov0883bec2008-05-17 21:10:10 -07003590 list_for_each_entry(vlan, &bond->vlan_list, vlan_list) {
Jay Vosburghf35188f2010-07-21 12:14:47 +00003591 if (!bond->vlgrp)
3592 continue;
Dan Aloni5c15bde2007-03-02 20:44:51 -08003593 vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04003594 if (vlan_dev == event_dev) {
3595 switch (event) {
3596 case NETDEV_UP:
3597 vlan->vlan_ip = ifa->ifa_local;
3598 return NOTIFY_OK;
3599 case NETDEV_DOWN:
3600 vlan->vlan_ip =
3601 bond_glean_dev_ip(vlan_dev);
3602 return NOTIFY_OK;
3603 default:
3604 return NOTIFY_DONE;
3605 }
3606 }
3607 }
3608 }
3609 return NOTIFY_DONE;
3610}
3611
Linus Torvalds1da177e2005-04-16 15:20:36 -07003612static struct notifier_block bond_netdev_notifier = {
3613 .notifier_call = bond_netdev_event,
3614};
3615
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04003616static struct notifier_block bond_inetaddr_notifier = {
3617 .notifier_call = bond_inetaddr_event,
3618};
3619
Linus Torvalds1da177e2005-04-16 15:20:36 -07003620/*-------------------------- Packet type handling ---------------------------*/
3621
3622/* register to receive lacpdus on a bond */
3623static void bond_register_lacpdu(struct bonding *bond)
3624{
3625 struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type);
3626
3627 /* initialize packet type */
3628 pk_type->type = PKT_TYPE_LACPDU;
3629 pk_type->dev = bond->dev;
3630 pk_type->func = bond_3ad_lacpdu_recv;
3631
3632 dev_add_pack(pk_type);
3633}
3634
3635/* unregister to receive lacpdus on a bond */
3636static void bond_unregister_lacpdu(struct bonding *bond)
3637{
3638 dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type));
3639}
3640
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003641void bond_register_arp(struct bonding *bond)
3642{
3643 struct packet_type *pt = &bond->arp_mon_pt;
3644
Jay Vosburghc4f283b2007-02-28 17:03:20 -08003645 if (pt->type)
3646 return;
3647
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003648 pt->type = htons(ETH_P_ARP);
Jay Vosburghe245cb72007-02-28 17:03:27 -08003649 pt->dev = bond->dev;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003650 pt->func = bond_arp_rcv;
3651 dev_add_pack(pt);
3652}
3653
3654void bond_unregister_arp(struct bonding *bond)
3655{
Jay Vosburghc4f283b2007-02-28 17:03:20 -08003656 struct packet_type *pt = &bond->arp_mon_pt;
3657
3658 dev_remove_pack(pt);
3659 pt->type = 0;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003660}
3661
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003662/*---------------------------- Hashing Policies -----------------------------*/
3663
3664/*
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08003665 * Hash for the output device based upon layer 2 and layer 3 data. If
3666 * the packet is not IP mimic bond_xmit_hash_policy_l2()
3667 */
Jasper Spaansa361c832009-10-23 04:09:24 +00003668static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count)
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08003669{
3670 struct ethhdr *data = (struct ethhdr *)skb->data;
3671 struct iphdr *iph = ip_hdr(skb);
3672
Brian Haleyf14c4e42008-09-02 10:08:08 -04003673 if (skb->protocol == htons(ETH_P_IP)) {
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08003674 return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^
Jasper Spaansd3da6832009-10-23 04:08:46 +00003675 (data->h_dest[5] ^ data->h_source[5])) % count;
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08003676 }
3677
Jasper Spaansd3da6832009-10-23 04:08:46 +00003678 return (data->h_dest[5] ^ data->h_source[5]) % count;
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08003679}
3680
3681/*
Michael Opdenacker59c51592007-05-09 08:57:56 +02003682 * Hash for the output device based upon layer 3 and layer 4 data. If
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003683 * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is
3684 * altogether not IP, mimic bond_xmit_hash_policy_l2()
3685 */
Jasper Spaansa361c832009-10-23 04:09:24 +00003686static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count)
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003687{
3688 struct ethhdr *data = (struct ethhdr *)skb->data;
Arnaldo Carvalho de Meloeddc9ec2007-04-20 22:47:35 -07003689 struct iphdr *iph = ip_hdr(skb);
Al Virod3bb52b2007-08-22 20:06:58 -04003690 __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl);
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003691 int layer4_xor = 0;
3692
Brian Haleyf14c4e42008-09-02 10:08:08 -04003693 if (skb->protocol == htons(ETH_P_IP)) {
3694 if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) &&
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003695 (iph->protocol == IPPROTO_TCP ||
3696 iph->protocol == IPPROTO_UDP)) {
Al Virod3bb52b2007-08-22 20:06:58 -04003697 layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1)));
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003698 }
3699 return (layer4_xor ^
3700 ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count;
3701
3702 }
3703
Jasper Spaansd3da6832009-10-23 04:08:46 +00003704 return (data->h_dest[5] ^ data->h_source[5]) % count;
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003705}
3706
3707/*
3708 * Hash for the output device based upon layer 2 data
3709 */
Jasper Spaansa361c832009-10-23 04:09:24 +00003710static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count)
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003711{
3712 struct ethhdr *data = (struct ethhdr *)skb->data;
3713
Jasper Spaansd3da6832009-10-23 04:08:46 +00003714 return (data->h_dest[5] ^ data->h_source[5]) % count;
Jay Vosburgh169a3e62005-06-26 17:54:11 -04003715}
3716
Linus Torvalds1da177e2005-04-16 15:20:36 -07003717/*-------------------------- Device entry points ----------------------------*/
3718
3719static int bond_open(struct net_device *bond_dev)
3720{
Wang Chen454d7c92008-11-12 23:37:49 -08003721 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003722
3723 bond->kill_timers = 0;
3724
Holger Eitzenberger58402052008-12-09 23:07:13 -08003725 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003726 /* bond_alb_initialize must be called before the timer
3727 * is started.
3728 */
3729 if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) {
3730 /* something went wrong - fail the open operation */
stephen hemmingerb4739462010-01-25 23:34:15 +00003731 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003732 }
3733
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003734 INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor);
3735 queue_delayed_work(bond->wq, &bond->alb_work, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003736 }
3737
3738 if (bond->params.miimon) { /* link check interval, in milliseconds. */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003739 INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor);
3740 queue_delayed_work(bond->wq, &bond->mii_work, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003741 }
3742
3743 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003744 if (bond->params.mode == BOND_MODE_ACTIVEBACKUP)
3745 INIT_DELAYED_WORK(&bond->arp_work,
3746 bond_activebackup_arp_mon);
3747 else
3748 INIT_DELAYED_WORK(&bond->arp_work,
3749 bond_loadbalance_arp_mon);
3750
3751 queue_delayed_work(bond->wq, &bond->arp_work, 0);
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003752 if (bond->params.arp_validate)
3753 bond_register_arp(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003754 }
3755
3756 if (bond->params.mode == BOND_MODE_8023AD) {
Adrian Bunka40745f2007-10-24 18:27:43 +02003757 INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler);
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003758 queue_delayed_work(bond->wq, &bond->ad_work, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003759 /* register to receive LACPDUs */
3760 bond_register_lacpdu(bond);
Jay Vosburghfd989c82008-11-04 17:51:16 -08003761 bond_3ad_initiate_agg_selection(bond, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003762 }
3763
3764 return 0;
3765}
3766
3767static int bond_close(struct net_device *bond_dev)
3768{
Wang Chen454d7c92008-11-12 23:37:49 -08003769 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003770
3771 if (bond->params.mode == BOND_MODE_8023AD) {
3772 /* Unregister the receive of LACPDUs */
3773 bond_unregister_lacpdu(bond);
3774 }
3775
Jay Vosburghf5b2b962006-09-22 21:54:53 -07003776 if (bond->params.arp_validate)
3777 bond_unregister_arp(bond);
3778
Linus Torvalds1da177e2005-04-16 15:20:36 -07003779 write_lock_bh(&bond->lock);
3780
Jay Vosburghb59f9f72008-06-13 18:12:03 -07003781 bond->send_grat_arp = 0;
Brian Haley305d5522008-11-04 17:51:14 -08003782 bond->send_unsol_na = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003783
3784 /* signal timers not to re-arm */
3785 bond->kill_timers = 1;
3786
3787 write_unlock_bh(&bond->lock);
3788
Linus Torvalds1da177e2005-04-16 15:20:36 -07003789 if (bond->params.miimon) { /* link check interval, in milliseconds. */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003790 cancel_delayed_work(&bond->mii_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003791 }
3792
3793 if (bond->params.arp_interval) { /* arp interval, in milliseconds. */
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003794 cancel_delayed_work(&bond->arp_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003795 }
3796
3797 switch (bond->params.mode) {
3798 case BOND_MODE_8023AD:
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003799 cancel_delayed_work(&bond->ad_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003800 break;
3801 case BOND_MODE_TLB:
3802 case BOND_MODE_ALB:
Jay Vosburgh1b76b312007-10-17 17:37:45 -07003803 cancel_delayed_work(&bond->alb_work);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003804 break;
3805 default:
3806 break;
3807 }
3808
Linus Torvalds1da177e2005-04-16 15:20:36 -07003809
Holger Eitzenberger58402052008-12-09 23:07:13 -08003810 if (bond_is_lb(bond)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003811 /* Must be called only after all
3812 * slaves have been released
3813 */
3814 bond_alb_deinitialize(bond);
3815 }
3816
3817 return 0;
3818}
3819
Eric Dumazet28172732010-07-07 14:58:56 -07003820static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev,
3821 struct rtnl_link_stats64 *stats)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003822{
Wang Chen454d7c92008-11-12 23:37:49 -08003823 struct bonding *bond = netdev_priv(bond_dev);
Eric Dumazet28172732010-07-07 14:58:56 -07003824 struct rtnl_link_stats64 temp;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003825 struct slave *slave;
3826 int i;
3827
Eric Dumazet28172732010-07-07 14:58:56 -07003828 memset(stats, 0, sizeof(*stats));
Linus Torvalds1da177e2005-04-16 15:20:36 -07003829
3830 read_lock_bh(&bond->lock);
3831
3832 bond_for_each_slave(bond, slave, i) {
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +00003833 const struct rtnl_link_stats64 *sstats =
Eric Dumazet28172732010-07-07 14:58:56 -07003834 dev_get_stats(slave->dev, &temp);
Stephen Hemmingereeda3fd2008-11-19 21:40:23 -08003835
Eric Dumazet28172732010-07-07 14:58:56 -07003836 stats->rx_packets += sstats->rx_packets;
3837 stats->rx_bytes += sstats->rx_bytes;
3838 stats->rx_errors += sstats->rx_errors;
3839 stats->rx_dropped += sstats->rx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003840
Eric Dumazet28172732010-07-07 14:58:56 -07003841 stats->tx_packets += sstats->tx_packets;
3842 stats->tx_bytes += sstats->tx_bytes;
3843 stats->tx_errors += sstats->tx_errors;
3844 stats->tx_dropped += sstats->tx_dropped;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003845
Eric Dumazet28172732010-07-07 14:58:56 -07003846 stats->multicast += sstats->multicast;
3847 stats->collisions += sstats->collisions;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003848
Eric Dumazet28172732010-07-07 14:58:56 -07003849 stats->rx_length_errors += sstats->rx_length_errors;
3850 stats->rx_over_errors += sstats->rx_over_errors;
3851 stats->rx_crc_errors += sstats->rx_crc_errors;
3852 stats->rx_frame_errors += sstats->rx_frame_errors;
3853 stats->rx_fifo_errors += sstats->rx_fifo_errors;
3854 stats->rx_missed_errors += sstats->rx_missed_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003855
Eric Dumazet28172732010-07-07 14:58:56 -07003856 stats->tx_aborted_errors += sstats->tx_aborted_errors;
3857 stats->tx_carrier_errors += sstats->tx_carrier_errors;
3858 stats->tx_fifo_errors += sstats->tx_fifo_errors;
3859 stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors;
3860 stats->tx_window_errors += sstats->tx_window_errors;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003861 }
3862
3863 read_unlock_bh(&bond->lock);
3864
3865 return stats;
3866}
3867
3868static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd)
3869{
3870 struct net_device *slave_dev = NULL;
3871 struct ifbond k_binfo;
3872 struct ifbond __user *u_binfo = NULL;
3873 struct ifslave k_sinfo;
3874 struct ifslave __user *u_sinfo = NULL;
3875 struct mii_ioctl_data *mii = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003876 int res = 0;
3877
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003878 pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003879
3880 switch (cmd) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07003881 case SIOCGMIIPHY:
3882 mii = if_mii(ifr);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003883 if (!mii)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003884 return -EINVAL;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003885
Linus Torvalds1da177e2005-04-16 15:20:36 -07003886 mii->phy_id = 0;
3887 /* Fall Through */
3888 case SIOCGMIIREG:
3889 /*
3890 * We do this again just in case we were called by SIOCGMIIREG
3891 * instead of SIOCGMIIPHY.
3892 */
3893 mii = if_mii(ifr);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003894 if (!mii)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003895 return -EINVAL;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003896
Linus Torvalds1da177e2005-04-16 15:20:36 -07003897
3898 if (mii->reg_num == 1) {
Wang Chen454d7c92008-11-12 23:37:49 -08003899 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003900 mii->val_out = 0;
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07003901 read_lock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003902 read_lock(&bond->curr_slave_lock);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003903 if (netif_carrier_ok(bond->dev))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003904 mii->val_out = BMSR_LSTATUS;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003905
Linus Torvalds1da177e2005-04-16 15:20:36 -07003906 read_unlock(&bond->curr_slave_lock);
Jay Vosburgh6603a6f2007-10-17 17:37:50 -07003907 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003908 }
3909
3910 return 0;
3911 case BOND_INFO_QUERY_OLD:
3912 case SIOCBONDINFOQUERY:
3913 u_binfo = (struct ifbond __user *)ifr->ifr_data;
3914
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003915 if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003916 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003917
3918 res = bond_info_query(bond_dev, &k_binfo);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003919 if (res == 0 &&
3920 copy_to_user(u_binfo, &k_binfo, sizeof(ifbond)))
3921 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003922
3923 return res;
3924 case BOND_SLAVE_INFO_QUERY_OLD:
3925 case SIOCBONDSLAVEINFOQUERY:
3926 u_sinfo = (struct ifslave __user *)ifr->ifr_data;
3927
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003928 if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003929 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003930
3931 res = bond_slave_info_query(bond_dev, &k_sinfo);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003932 if (res == 0 &&
3933 copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave)))
3934 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003935
3936 return res;
3937 default:
3938 /* Go on */
3939 break;
3940 }
3941
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003942 if (!capable(CAP_NET_ADMIN))
Linus Torvalds1da177e2005-04-16 15:20:36 -07003943 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003944
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00003945 slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003946
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003947 pr_debug("slave_dev=%p:\n", slave_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003948
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003949 if (!slave_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07003950 res = -ENODEV;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00003951 else {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08003952 pr_debug("slave_dev->name=%s:\n", slave_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07003953 switch (cmd) {
3954 case BOND_ENSLAVE_OLD:
3955 case SIOCBONDENSLAVE:
3956 res = bond_enslave(bond_dev, slave_dev);
3957 break;
3958 case BOND_RELEASE_OLD:
3959 case SIOCBONDRELEASE:
3960 res = bond_release(bond_dev, slave_dev);
3961 break;
3962 case BOND_SETHWADDR_OLD:
3963 case SIOCBONDSETHWADDR:
3964 res = bond_sethwaddr(bond_dev, slave_dev);
3965 break;
3966 case BOND_CHANGE_ACTIVE_OLD:
3967 case SIOCBONDCHANGEACTIVE:
3968 res = bond_ioctl_change_active(bond_dev, slave_dev);
3969 break;
3970 default:
3971 res = -EOPNOTSUPP;
3972 }
3973
3974 dev_put(slave_dev);
3975 }
3976
Linus Torvalds1da177e2005-04-16 15:20:36 -07003977 return res;
3978}
3979
Jiri Pirko22bedad32010-04-01 21:22:57 +00003980static bool bond_addr_in_mc_list(unsigned char *addr,
3981 struct netdev_hw_addr_list *list,
3982 int addrlen)
3983{
3984 struct netdev_hw_addr *ha;
3985
3986 netdev_hw_addr_list_for_each(ha, list)
3987 if (!memcmp(ha->addr, addr, addrlen))
3988 return true;
3989
3990 return false;
3991}
3992
Linus Torvalds1da177e2005-04-16 15:20:36 -07003993static void bond_set_multicast_list(struct net_device *bond_dev)
3994{
Wang Chen454d7c92008-11-12 23:37:49 -08003995 struct bonding *bond = netdev_priv(bond_dev);
Jiri Pirko22bedad32010-04-01 21:22:57 +00003996 struct netdev_hw_addr *ha;
3997 bool found;
Linus Torvalds1da177e2005-04-16 15:20:36 -07003998
Linus Torvalds1da177e2005-04-16 15:20:36 -07003999 /*
4000 * Do promisc before checking multicast_mode
4001 */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004002 if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC))
Wang Chen7e1a1ac2008-07-14 20:51:36 -07004003 /*
4004 * FIXME: Need to handle the error when one of the multi-slaves
4005 * encounters error.
4006 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004007 bond_set_promiscuity(bond, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004008
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004009
4010 if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004011 bond_set_promiscuity(bond, -1);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004012
Linus Torvalds1da177e2005-04-16 15:20:36 -07004013
4014 /* set allmulti flag to slaves */
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004015 if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI))
Wang Chen7e1a1ac2008-07-14 20:51:36 -07004016 /*
4017 * FIXME: Need to handle the error when one of the multi-slaves
4018 * encounters error.
4019 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004020 bond_set_allmulti(bond, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004021
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004022
4023 if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004024 bond_set_allmulti(bond, -1);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004025
Linus Torvalds1da177e2005-04-16 15:20:36 -07004026
Jay Vosburgh80ee5ad2008-01-29 18:07:44 -08004027 read_lock(&bond->lock);
4028
Linus Torvalds1da177e2005-04-16 15:20:36 -07004029 bond->flags = bond_dev->flags;
4030
4031 /* looking for addresses to add to slaves' mc list */
Jiri Pirko22bedad32010-04-01 21:22:57 +00004032 netdev_for_each_mc_addr(ha, bond_dev) {
4033 found = bond_addr_in_mc_list(ha->addr, &bond->mc_list,
4034 bond_dev->addr_len);
4035 if (!found)
4036 bond_mc_add(bond, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004037 }
4038
4039 /* looking for addresses to delete from slaves' list */
Jiri Pirko22bedad32010-04-01 21:22:57 +00004040 netdev_hw_addr_list_for_each(ha, &bond->mc_list) {
4041 found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc,
4042 bond_dev->addr_len);
4043 if (!found)
4044 bond_mc_del(bond, ha->addr);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004045 }
4046
4047 /* save master's multicast list */
Jiri Pirko22bedad32010-04-01 21:22:57 +00004048 __hw_addr_flush(&bond->mc_list);
4049 __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc,
4050 bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004051
Jay Vosburgh80ee5ad2008-01-29 18:07:44 -08004052 read_unlock(&bond->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004053}
4054
Stephen Hemminger00829822008-11-20 20:14:53 -08004055static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms)
4056{
4057 struct bonding *bond = netdev_priv(dev);
4058 struct slave *slave = bond->first_slave;
4059
4060 if (slave) {
4061 const struct net_device_ops *slave_ops
4062 = slave->dev->netdev_ops;
4063 if (slave_ops->ndo_neigh_setup)
Patrick McHardy72e22402009-03-05 01:57:44 -08004064 return slave_ops->ndo_neigh_setup(slave->dev, parms);
Stephen Hemminger00829822008-11-20 20:14:53 -08004065 }
4066 return 0;
4067}
4068
Linus Torvalds1da177e2005-04-16 15:20:36 -07004069/*
4070 * Change the MTU of all of a master's slaves to match the master
4071 */
4072static int bond_change_mtu(struct net_device *bond_dev, int new_mtu)
4073{
Wang Chen454d7c92008-11-12 23:37:49 -08004074 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004075 struct slave *slave, *stop_at;
4076 int res = 0;
4077 int i;
4078
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08004079 pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond,
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004080 (bond_dev ? bond_dev->name : "None"), new_mtu);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004081
4082 /* Can't hold bond->lock with bh disabled here since
4083 * some base drivers panic. On the other hand we can't
4084 * hold bond->lock without bh disabled because we'll
4085 * deadlock. The only solution is to rely on the fact
4086 * that we're under rtnl_lock here, and the slaves
4087 * list won't change. This doesn't solve the problem
4088 * of setting the slave's MTU while it is
4089 * transmitting, but the assumption is that the base
4090 * driver can handle that.
4091 *
4092 * TODO: figure out a way to safely iterate the slaves
4093 * list, but without holding a lock around the actual
4094 * call to the base driver.
4095 */
4096
4097 bond_for_each_slave(bond, slave, i) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004098 pr_debug("s %p s->p %p c_m %p\n",
4099 slave,
4100 slave->prev,
4101 slave->dev->netdev_ops->ndo_change_mtu);
Mitch Williamse944ef72005-11-09 10:36:50 -08004102
Linus Torvalds1da177e2005-04-16 15:20:36 -07004103 res = dev_set_mtu(slave->dev, new_mtu);
4104
4105 if (res) {
4106 /* If we failed to set the slave's mtu to the new value
4107 * we must abort the operation even in ACTIVE_BACKUP
4108 * mode, because if we allow the backup slaves to have
4109 * different mtu values than the active slave we'll
4110 * need to change their mtu when doing a failover. That
4111 * means changing their mtu from timer context, which
4112 * is probably not a good idea.
4113 */
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08004114 pr_debug("err %d %s\n", res, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004115 goto unwind;
4116 }
4117 }
4118
4119 bond_dev->mtu = new_mtu;
4120
4121 return 0;
4122
4123unwind:
4124 /* unwind from head to the slave that failed */
4125 stop_at = slave;
4126 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4127 int tmp_res;
4128
4129 tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu);
4130 if (tmp_res) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004131 pr_debug("unwind err %d dev %s\n",
4132 tmp_res, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004133 }
4134 }
4135
4136 return res;
4137}
4138
4139/*
4140 * Change HW address
4141 *
4142 * Note that many devices must be down to change the HW address, and
4143 * downing the master releases all slaves. We can make bonds full of
4144 * bonding devices to test this, however.
4145 */
4146static int bond_set_mac_address(struct net_device *bond_dev, void *addr)
4147{
Wang Chen454d7c92008-11-12 23:37:49 -08004148 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004149 struct sockaddr *sa = addr, tmp_sa;
4150 struct slave *slave, *stop_at;
4151 int res = 0;
4152 int i;
4153
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004154 if (bond->params.mode == BOND_MODE_ALB)
4155 return bond_alb_set_mac_address(bond_dev, addr);
4156
4157
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004158 pr_debug("bond=%p, name=%s\n",
4159 bond, bond_dev ? bond_dev->name : "None");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004160
Jay Vosburghdd957c52007-10-09 19:57:24 -07004161 /*
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07004162 * If fail_over_mac is set to active, do nothing and return
4163 * success. Returning an error causes ifenslave to fail.
Jay Vosburghdd957c52007-10-09 19:57:24 -07004164 */
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07004165 if (bond->params.fail_over_mac == BOND_FOM_ACTIVE)
Jay Vosburghdd957c52007-10-09 19:57:24 -07004166 return 0;
Moni Shoua2ab82852007-10-09 19:43:39 -07004167
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004168 if (!is_valid_ether_addr(sa->sa_data))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004169 return -EADDRNOTAVAIL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004170
4171 /* Can't hold bond->lock with bh disabled here since
4172 * some base drivers panic. On the other hand we can't
4173 * hold bond->lock without bh disabled because we'll
4174 * deadlock. The only solution is to rely on the fact
4175 * that we're under rtnl_lock here, and the slaves
4176 * list won't change. This doesn't solve the problem
4177 * of setting the slave's hw address while it is
4178 * transmitting, but the assumption is that the base
4179 * driver can handle that.
4180 *
4181 * TODO: figure out a way to safely iterate the slaves
4182 * list, but without holding a lock around the actual
4183 * call to the base driver.
4184 */
4185
4186 bond_for_each_slave(bond, slave, i) {
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004187 const struct net_device_ops *slave_ops = slave->dev->netdev_ops;
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08004188 pr_debug("slave %p %s\n", slave, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004189
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004190 if (slave_ops->ndo_set_mac_address == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004191 res = -EOPNOTSUPP;
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08004192 pr_debug("EOPNOTSUPP %s\n", slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004193 goto unwind;
4194 }
4195
4196 res = dev_set_mac_address(slave->dev, addr);
4197 if (res) {
4198 /* TODO: consider downing the slave
4199 * and retry ?
4200 * User should expect communications
4201 * breakage anyway until ARP finish
4202 * updating, so...
4203 */
Holger Eitzenberger5a03cdb2008-12-09 23:09:22 -08004204 pr_debug("err %d %s\n", res, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004205 goto unwind;
4206 }
4207 }
4208
4209 /* success */
4210 memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len);
4211 return 0;
4212
4213unwind:
4214 memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len);
4215 tmp_sa.sa_family = bond_dev->type;
4216
4217 /* unwind from head to the slave that failed */
4218 stop_at = slave;
4219 bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) {
4220 int tmp_res;
4221
4222 tmp_res = dev_set_mac_address(slave->dev, &tmp_sa);
4223 if (tmp_res) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004224 pr_debug("unwind err %d dev %s\n",
4225 tmp_res, slave->dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004226 }
4227 }
4228
4229 return res;
4230}
4231
4232static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev)
4233{
Wang Chen454d7c92008-11-12 23:37:49 -08004234 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004235 struct slave *slave, *start_at;
Jay Vosburghcf5f9042007-10-17 17:37:47 -07004236 int i, slave_no, res = 1;
Andy Gospodareka2fd9402010-03-25 14:49:05 +00004237 struct iphdr *iph = ip_hdr(skb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004238
4239 read_lock(&bond->lock);
4240
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004241 if (!BOND_IS_OK(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004242 goto out;
Jay Vosburghcf5f9042007-10-17 17:37:47 -07004243 /*
Andy Gospodareka2fd9402010-03-25 14:49:05 +00004244 * Start with the curr_active_slave that joined the bond as the
4245 * default for sending IGMP traffic. For failover purposes one
4246 * needs to maintain some consistency for the interface that will
4247 * send the join/membership reports. The curr_active_slave found
4248 * will send all of this type of traffic.
Jay Vosburghcf5f9042007-10-17 17:37:47 -07004249 */
Eric Dumazet00ae7022010-03-30 23:08:37 +00004250 if ((iph->protocol == IPPROTO_IGMP) &&
Andy Gospodareka2fd9402010-03-25 14:49:05 +00004251 (skb->protocol == htons(ETH_P_IP))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004252
Andy Gospodareka2fd9402010-03-25 14:49:05 +00004253 read_lock(&bond->curr_slave_lock);
4254 slave = bond->curr_active_slave;
4255 read_unlock(&bond->curr_slave_lock);
4256
4257 if (!slave)
4258 goto out;
4259 } else {
4260 /*
4261 * Concurrent TX may collide on rr_tx_counter; we accept
4262 * that as being rare enough not to justify using an
4263 * atomic op here.
4264 */
4265 slave_no = bond->rr_tx_counter++ % bond->slave_cnt;
4266
4267 bond_for_each_slave(bond, slave, i) {
4268 slave_no--;
4269 if (slave_no < 0)
4270 break;
4271 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07004272 }
4273
Jay Vosburghcf5f9042007-10-17 17:37:47 -07004274 start_at = slave;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004275 bond_for_each_slave_from(bond, slave, i, start_at) {
4276 if (IS_UP(slave->dev) &&
4277 (slave->link == BOND_LINK_UP) &&
4278 (slave->state == BOND_STATE_ACTIVE)) {
4279 res = bond_dev_queue_xmit(bond, skb, slave->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004280 break;
4281 }
4282 }
4283
Linus Torvalds1da177e2005-04-16 15:20:36 -07004284out:
4285 if (res) {
4286 /* no suitable interface, frame not sent */
4287 dev_kfree_skb(skb);
4288 }
4289 read_unlock(&bond->lock);
Patrick McHardyec634fe2009-07-05 19:23:38 -07004290 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004291}
4292
John W. Linville075897c2005-09-28 17:50:53 -04004293
Linus Torvalds1da177e2005-04-16 15:20:36 -07004294/*
4295 * in active-backup mode, we know that bond->curr_active_slave is always valid if
4296 * the bond has a usable interface.
4297 */
4298static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev)
4299{
Wang Chen454d7c92008-11-12 23:37:49 -08004300 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004301 int res = 1;
4302
Linus Torvalds1da177e2005-04-16 15:20:36 -07004303 read_lock(&bond->lock);
4304 read_lock(&bond->curr_slave_lock);
4305
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004306 if (!BOND_IS_OK(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004307 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004308
John W. Linville075897c2005-09-28 17:50:53 -04004309 if (!bond->curr_active_slave)
4310 goto out;
4311
John W. Linville075897c2005-09-28 17:50:53 -04004312 res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev);
4313
Linus Torvalds1da177e2005-04-16 15:20:36 -07004314out:
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004315 if (res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004316 /* no suitable interface, frame not sent */
4317 dev_kfree_skb(skb);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004318
Linus Torvalds1da177e2005-04-16 15:20:36 -07004319 read_unlock(&bond->curr_slave_lock);
4320 read_unlock(&bond->lock);
Patrick McHardyec634fe2009-07-05 19:23:38 -07004321 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004322}
4323
4324/*
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004325 * In bond_xmit_xor() , we determine the output device by using a pre-
4326 * determined xmit_hash_policy(), If the selected device is not enabled,
4327 * find the next active slave.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004328 */
4329static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev)
4330{
Wang Chen454d7c92008-11-12 23:37:49 -08004331 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004332 struct slave *slave, *start_at;
4333 int slave_no;
4334 int i;
4335 int res = 1;
4336
4337 read_lock(&bond->lock);
4338
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004339 if (!BOND_IS_OK(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004340 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004341
Jasper Spaansa361c832009-10-23 04:09:24 +00004342 slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004343
4344 bond_for_each_slave(bond, slave, i) {
4345 slave_no--;
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004346 if (slave_no < 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004347 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004348 }
4349
4350 start_at = slave;
4351
4352 bond_for_each_slave_from(bond, slave, i, start_at) {
4353 if (IS_UP(slave->dev) &&
4354 (slave->link == BOND_LINK_UP) &&
4355 (slave->state == BOND_STATE_ACTIVE)) {
4356 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4357 break;
4358 }
4359 }
4360
4361out:
4362 if (res) {
4363 /* no suitable interface, frame not sent */
4364 dev_kfree_skb(skb);
4365 }
4366 read_unlock(&bond->lock);
Patrick McHardyec634fe2009-07-05 19:23:38 -07004367 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004368}
4369
4370/*
4371 * in broadcast mode, we send everything to all usable interfaces.
4372 */
4373static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev)
4374{
Wang Chen454d7c92008-11-12 23:37:49 -08004375 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004376 struct slave *slave, *start_at;
4377 struct net_device *tx_dev = NULL;
4378 int i;
4379 int res = 1;
4380
4381 read_lock(&bond->lock);
4382
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004383 if (!BOND_IS_OK(bond))
Linus Torvalds1da177e2005-04-16 15:20:36 -07004384 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004385
4386 read_lock(&bond->curr_slave_lock);
4387 start_at = bond->curr_active_slave;
4388 read_unlock(&bond->curr_slave_lock);
4389
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004390 if (!start_at)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004391 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004392
4393 bond_for_each_slave_from(bond, slave, i, start_at) {
4394 if (IS_UP(slave->dev) &&
4395 (slave->link == BOND_LINK_UP) &&
4396 (slave->state == BOND_STATE_ACTIVE)) {
4397 if (tx_dev) {
4398 struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC);
4399 if (!skb2) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004400 pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n",
Mitch Williams4e0952c2005-11-09 10:34:57 -08004401 bond_dev->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004402 continue;
4403 }
4404
4405 res = bond_dev_queue_xmit(bond, skb2, tx_dev);
4406 if (res) {
4407 dev_kfree_skb(skb2);
4408 continue;
4409 }
4410 }
4411 tx_dev = slave->dev;
4412 }
4413 }
4414
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004415 if (tx_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004416 res = bond_dev_queue_xmit(bond, skb, tx_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004417
4418out:
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004419 if (res)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004420 /* no suitable interface, frame not sent */
4421 dev_kfree_skb(skb);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004422
Linus Torvalds1da177e2005-04-16 15:20:36 -07004423 /* frame sent to all suitable interfaces */
4424 read_unlock(&bond->lock);
Patrick McHardyec634fe2009-07-05 19:23:38 -07004425 return NETDEV_TX_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004426}
4427
4428/*------------------------- Device initialization ---------------------------*/
4429
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08004430static void bond_set_xmit_hash_policy(struct bonding *bond)
4431{
4432 switch (bond->params.xmit_policy) {
4433 case BOND_XMIT_POLICY_LAYER23:
4434 bond->xmit_hash_policy = bond_xmit_hash_policy_l23;
4435 break;
4436 case BOND_XMIT_POLICY_LAYER34:
4437 bond->xmit_hash_policy = bond_xmit_hash_policy_l34;
4438 break;
4439 case BOND_XMIT_POLICY_LAYER2:
4440 default:
4441 bond->xmit_hash_policy = bond_xmit_hash_policy_l2;
4442 break;
4443 }
4444}
4445
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00004446/*
4447 * Lookup the slave that corresponds to a qid
4448 */
4449static inline int bond_slave_override(struct bonding *bond,
4450 struct sk_buff *skb)
4451{
4452 int i, res = 1;
4453 struct slave *slave = NULL;
4454 struct slave *check_slave;
4455
4456 read_lock(&bond->lock);
4457
4458 if (!BOND_IS_OK(bond) || !skb->queue_mapping)
4459 goto out;
4460
4461 /* Find out if any slaves have the same mapping as this skb. */
4462 bond_for_each_slave(bond, check_slave, i) {
4463 if (check_slave->queue_id == skb->queue_mapping) {
4464 slave = check_slave;
4465 break;
4466 }
4467 }
4468
4469 /* If the slave isn't UP, use default transmit policy. */
4470 if (slave && slave->queue_id && IS_UP(slave->dev) &&
4471 (slave->link == BOND_LINK_UP)) {
4472 res = bond_dev_queue_xmit(bond, skb, slave->dev);
4473 }
4474
4475out:
4476 read_unlock(&bond->lock);
4477 return res;
4478}
4479
4480static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb)
4481{
4482 /*
4483 * This helper function exists to help dev_pick_tx get the correct
4484 * destination queue. Using a helper function skips the a call to
4485 * skb_tx_hash and will put the skbs in the queue we expect on their
4486 * way down to the bonding driver.
4487 */
4488 return skb->queue_mapping;
4489}
4490
Stephen Hemminger424efe92009-08-31 19:50:51 +00004491static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev)
Stephen Hemminger00829822008-11-20 20:14:53 -08004492{
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00004493 struct bonding *bond = netdev_priv(dev);
4494
4495 if (TX_QUEUE_OVERRIDE(bond->params.mode)) {
4496 if (!bond_slave_override(bond, skb))
4497 return NETDEV_TX_OK;
4498 }
Stephen Hemminger00829822008-11-20 20:14:53 -08004499
4500 switch (bond->params.mode) {
4501 case BOND_MODE_ROUNDROBIN:
4502 return bond_xmit_roundrobin(skb, dev);
4503 case BOND_MODE_ACTIVEBACKUP:
4504 return bond_xmit_activebackup(skb, dev);
4505 case BOND_MODE_XOR:
4506 return bond_xmit_xor(skb, dev);
4507 case BOND_MODE_BROADCAST:
4508 return bond_xmit_broadcast(skb, dev);
4509 case BOND_MODE_8023AD:
4510 return bond_3ad_xmit_xor(skb, dev);
4511 case BOND_MODE_ALB:
4512 case BOND_MODE_TLB:
4513 return bond_alb_xmit(skb, dev);
4514 default:
4515 /* Should never happen, mode already checked */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004516 pr_err("%s: Error: Unknown bonding mode %d\n",
4517 dev->name, bond->params.mode);
Stephen Hemminger00829822008-11-20 20:14:53 -08004518 WARN_ON_ONCE(1);
4519 dev_kfree_skb(skb);
4520 return NETDEV_TX_OK;
4521 }
4522}
4523
4524
Linus Torvalds1da177e2005-04-16 15:20:36 -07004525/*
4526 * set bond mode specific net device operations
4527 */
Mitch Williamsa77b5322005-11-09 10:35:51 -08004528void bond_set_mode_ops(struct bonding *bond, int mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004529{
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004530 struct net_device *bond_dev = bond->dev;
4531
Linus Torvalds1da177e2005-04-16 15:20:36 -07004532 switch (mode) {
4533 case BOND_MODE_ROUNDROBIN:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004534 break;
4535 case BOND_MODE_ACTIVEBACKUP:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004536 break;
4537 case BOND_MODE_XOR:
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08004538 bond_set_xmit_hash_policy(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004539 break;
4540 case BOND_MODE_BROADCAST:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004541 break;
4542 case BOND_MODE_8023AD:
Jay Vosburgh8f903c72006-02-21 16:36:44 -08004543 bond_set_master_3ad_flags(bond);
Jay Vosburgh6f6652b2007-12-06 23:40:34 -08004544 bond_set_xmit_hash_policy(bond);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004545 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004546 case BOND_MODE_ALB:
Jay Vosburgh8f903c72006-02-21 16:36:44 -08004547 bond_set_master_alb_flags(bond);
4548 /* FALLTHRU */
4549 case BOND_MODE_TLB:
Linus Torvalds1da177e2005-04-16 15:20:36 -07004550 break;
4551 default:
4552 /* Should never happen, mode already checked */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004553 pr_err("%s: Error: Unknown bonding mode %d\n",
4554 bond_dev->name, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004555 break;
4556 }
4557}
4558
Jay Vosburgh217df672005-09-26 16:11:50 -07004559static void bond_ethtool_get_drvinfo(struct net_device *bond_dev,
4560 struct ethtool_drvinfo *drvinfo)
4561{
4562 strncpy(drvinfo->driver, DRV_NAME, 32);
4563 strncpy(drvinfo->version, DRV_VERSION, 32);
4564 snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION);
4565}
4566
Jeff Garzik7282d492006-09-13 14:30:00 -04004567static const struct ethtool_ops bond_ethtool_ops = {
Jay Vosburgh217df672005-09-26 16:11:50 -07004568 .get_drvinfo = bond_ethtool_get_drvinfo,
Stephen Hemmingerfa53eba2008-09-13 21:17:09 -04004569 .get_link = ethtool_op_get_link,
4570 .get_tx_csum = ethtool_op_get_tx_csum,
4571 .get_sg = ethtool_op_get_sg,
4572 .get_tso = ethtool_op_get_tso,
4573 .get_ufo = ethtool_op_get_ufo,
4574 .get_flags = ethtool_op_get_flags,
Arthur Kepner8531c5f2005-08-23 01:34:53 -04004575};
4576
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004577static const struct net_device_ops bond_netdev_ops = {
Stephen Hemminger181470f2009-06-12 19:02:52 +00004578 .ndo_init = bond_init,
Stephen Hemminger9e716262009-06-12 19:02:47 +00004579 .ndo_uninit = bond_uninit,
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004580 .ndo_open = bond_open,
4581 .ndo_stop = bond_close,
Stephen Hemminger00829822008-11-20 20:14:53 -08004582 .ndo_start_xmit = bond_start_xmit,
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00004583 .ndo_select_queue = bond_select_queue,
Ben Hutchingsbe1f3c22010-06-08 07:19:54 +00004584 .ndo_get_stats64 = bond_get_stats,
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004585 .ndo_do_ioctl = bond_do_ioctl,
4586 .ndo_set_multicast_list = bond_set_multicast_list,
4587 .ndo_change_mtu = bond_change_mtu,
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004588 .ndo_set_mac_address = bond_set_mac_address,
Stephen Hemminger00829822008-11-20 20:14:53 -08004589 .ndo_neigh_setup = bond_neigh_setup,
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004590 .ndo_vlan_rx_register = bond_vlan_rx_register,
4591 .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid,
4592 .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid,
WANG Congf6dc31a2010-05-06 00:48:51 -07004593#ifdef CONFIG_NET_POLL_CONTROLLER
4594 .ndo_netpoll_cleanup = bond_netpoll_cleanup,
4595 .ndo_poll_controller = bond_poll_controller,
4596#endif
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004597};
4598
Amerigo Wang9e2e61f2010-03-31 21:30:52 +00004599static void bond_destructor(struct net_device *bond_dev)
4600{
4601 struct bonding *bond = netdev_priv(bond_dev);
4602 if (bond->wq)
4603 destroy_workqueue(bond->wq);
4604 free_netdev(bond_dev);
4605}
4606
Stephen Hemminger181470f2009-06-12 19:02:52 +00004607static void bond_setup(struct net_device *bond_dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004608{
Wang Chen454d7c92008-11-12 23:37:49 -08004609 struct bonding *bond = netdev_priv(bond_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004610
Linus Torvalds1da177e2005-04-16 15:20:36 -07004611 /* initialize rwlocks */
4612 rwlock_init(&bond->lock);
4613 rwlock_init(&bond->curr_slave_lock);
4614
Stephen Hemmingerd2991f72009-06-12 19:02:44 +00004615 bond->params = bonding_defaults;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004616
4617 /* Initialize pointers */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004618 bond->dev = bond_dev;
4619 INIT_LIST_HEAD(&bond->vlan_list);
4620
4621 /* Initialize the device entry points */
Stephen Hemminger181470f2009-06-12 19:02:52 +00004622 ether_setup(bond_dev);
Stephen Hemmingereb7cc592008-11-19 21:56:05 -08004623 bond_dev->netdev_ops = &bond_netdev_ops;
Arthur Kepner8531c5f2005-08-23 01:34:53 -04004624 bond_dev->ethtool_ops = &bond_ethtool_ops;
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004625 bond_set_mode_ops(bond, bond->params.mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004626
Amerigo Wang9e2e61f2010-03-31 21:30:52 +00004627 bond_dev->destructor = bond_destructor;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004628
4629 /* Initialize the device options */
4630 bond_dev->tx_queue_len = 0;
4631 bond_dev->flags |= IFF_MASTER|IFF_MULTICAST;
Jay Vosburgh0b680e72006-09-22 21:54:10 -07004632 bond_dev->priv_flags |= IFF_BONDING;
Stephen Hemminger181470f2009-06-12 19:02:52 +00004633 bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE;
4634
Jay Vosburgh6cf3f412008-11-03 18:16:50 -08004635 if (bond->params.arp_interval)
4636 bond_dev->priv_flags |= IFF_MASTER_ARPMON;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004637
4638 /* At first, we block adding VLANs. That's the only way to
4639 * prevent problems that occur when adding VLANs over an
4640 * empty bond. The block will be removed once non-challenged
4641 * slaves are enslaved.
4642 */
4643 bond_dev->features |= NETIF_F_VLAN_CHALLENGED;
4644
Herbert Xu932ff272006-06-09 12:20:56 -07004645 /* don't acquire bond device's netif_tx_lock when
Linus Torvalds1da177e2005-04-16 15:20:36 -07004646 * transmitting */
4647 bond_dev->features |= NETIF_F_LLTX;
4648
4649 /* By default, we declare the bond to be fully
4650 * VLAN hardware accelerated capable. Special
4651 * care is taken in the various xmit functions
4652 * when there are slaves that are not hw accel
4653 * capable
4654 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07004655 bond_dev->features |= (NETIF_F_HW_VLAN_TX |
4656 NETIF_F_HW_VLAN_RX |
4657 NETIF_F_HW_VLAN_FILTER);
4658
Linus Torvalds1da177e2005-04-16 15:20:36 -07004659}
4660
Jay Vosburghfdaea7a2007-12-06 23:40:35 -08004661static void bond_work_cancel_all(struct bonding *bond)
4662{
4663 write_lock_bh(&bond->lock);
4664 bond->kill_timers = 1;
4665 write_unlock_bh(&bond->lock);
4666
4667 if (bond->params.miimon && delayed_work_pending(&bond->mii_work))
4668 cancel_delayed_work(&bond->mii_work);
4669
4670 if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work))
4671 cancel_delayed_work(&bond->arp_work);
4672
4673 if (bond->params.mode == BOND_MODE_ALB &&
4674 delayed_work_pending(&bond->alb_work))
4675 cancel_delayed_work(&bond->alb_work);
4676
4677 if (bond->params.mode == BOND_MODE_8023AD &&
4678 delayed_work_pending(&bond->ad_work))
4679 cancel_delayed_work(&bond->ad_work);
4680}
4681
Eric W. Biedermanc67dfb22009-10-29 14:18:24 +00004682/*
4683* Destroy a bonding device.
4684* Must be under rtnl_lock when this function is called.
4685*/
4686static void bond_uninit(struct net_device *bond_dev)
Jay Vosburgha434e432008-10-30 17:41:15 -07004687{
Wang Chen454d7c92008-11-12 23:37:49 -08004688 struct bonding *bond = netdev_priv(bond_dev);
Jay Vosburghf35188f2010-07-21 12:14:47 +00004689 struct vlan_entry *vlan, *tmp;
Jay Vosburgha434e432008-10-30 17:41:15 -07004690
WANG Congf6dc31a2010-05-06 00:48:51 -07004691 bond_netpoll_cleanup(bond_dev);
4692
Eric W. Biedermanc67dfb22009-10-29 14:18:24 +00004693 /* Release the bonded slaves */
4694 bond_release_all(bond_dev);
4695
Jay Vosburgha434e432008-10-30 17:41:15 -07004696 list_del(&bond->bond_list);
4697
4698 bond_work_cancel_all(bond);
4699
Jay Vosburgha434e432008-10-30 17:41:15 -07004700 bond_remove_proc_entry(bond);
Eric W. Biedermanc67dfb22009-10-29 14:18:24 +00004701
Jiri Pirko22bedad32010-04-01 21:22:57 +00004702 __hw_addr_flush(&bond->mc_list);
Jay Vosburghf35188f2010-07-21 12:14:47 +00004703
4704 list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) {
4705 list_del(&vlan->vlan_list);
4706 kfree(vlan);
4707 }
Jay Vosburgha434e432008-10-30 17:41:15 -07004708}
4709
Linus Torvalds1da177e2005-04-16 15:20:36 -07004710/*------------------------- Module initialization ---------------------------*/
4711
4712/*
4713 * Convert string input module parms. Accept either the
Jay Vosburghece95f72008-01-17 16:25:01 -08004714 * number of the mode or its string name. A bit complicated because
4715 * some mode names are substrings of other names, and calls from sysfs
4716 * may have whitespace in the name (trailing newlines, for example).
Linus Torvalds1da177e2005-04-16 15:20:36 -07004717 */
Holger Eitzenberger325dcf72008-12-09 23:10:17 -08004718int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004719{
Hannes Eder54b87322009-02-14 11:15:49 +00004720 int modeint = -1, i, rv;
Jay Vosburgha42e5342008-01-29 18:07:43 -08004721 char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, };
Jay Vosburghece95f72008-01-17 16:25:01 -08004722
Jay Vosburgha42e5342008-01-29 18:07:43 -08004723 for (p = (char *)buf; *p; p++)
4724 if (!(isdigit(*p) || isspace(*p)))
4725 break;
4726
4727 if (*p)
Jay Vosburghece95f72008-01-17 16:25:01 -08004728 rv = sscanf(buf, "%20s", modestr);
Jay Vosburgha42e5342008-01-29 18:07:43 -08004729 else
Hannes Eder54b87322009-02-14 11:15:49 +00004730 rv = sscanf(buf, "%d", &modeint);
Jay Vosburgha42e5342008-01-29 18:07:43 -08004731
4732 if (!rv)
4733 return -1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004734
4735 for (i = 0; tbl[i].modename; i++) {
Hannes Eder54b87322009-02-14 11:15:49 +00004736 if (modeint == tbl[i].mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -07004737 return tbl[i].mode;
Jay Vosburghece95f72008-01-17 16:25:01 -08004738 if (strcmp(modestr, tbl[i].modename) == 0)
4739 return tbl[i].mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -07004740 }
4741
4742 return -1;
4743}
4744
4745static int bond_check_params(struct bond_params *params)
4746{
Jiri Pirkoa5499522009-09-25 03:28:09 +00004747 int arp_validate_value, fail_over_mac_value, primary_reselect_value;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07004748
Linus Torvalds1da177e2005-04-16 15:20:36 -07004749 /*
4750 * Convert string parameters.
4751 */
4752 if (mode) {
4753 bond_mode = bond_parse_parm(mode, bond_mode_tbl);
4754 if (bond_mode == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004755 pr_err("Error: Invalid bonding mode \"%s\"\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004756 mode == NULL ? "NULL" : mode);
4757 return -EINVAL;
4758 }
4759 }
4760
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004761 if (xmit_hash_policy) {
4762 if ((bond_mode != BOND_MODE_XOR) &&
4763 (bond_mode != BOND_MODE_8023AD)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004764 pr_info("xmit_hash_policy param is irrelevant in mode %s\n",
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004765 bond_mode_name(bond_mode));
4766 } else {
4767 xmit_hashtype = bond_parse_parm(xmit_hash_policy,
4768 xmit_hashtype_tbl);
4769 if (xmit_hashtype == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004770 pr_err("Error: Invalid xmit_hash_policy \"%s\"\n",
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004771 xmit_hash_policy == NULL ? "NULL" :
Jay Vosburgh169a3e62005-06-26 17:54:11 -04004772 xmit_hash_policy);
4773 return -EINVAL;
4774 }
4775 }
4776 }
4777
Linus Torvalds1da177e2005-04-16 15:20:36 -07004778 if (lacp_rate) {
4779 if (bond_mode != BOND_MODE_8023AD) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004780 pr_info("lacp_rate param is irrelevant in mode %s\n",
4781 bond_mode_name(bond_mode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004782 } else {
4783 lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl);
4784 if (lacp_fast == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004785 pr_err("Error: Invalid lacp rate \"%s\"\n",
Linus Torvalds1da177e2005-04-16 15:20:36 -07004786 lacp_rate == NULL ? "NULL" : lacp_rate);
4787 return -EINVAL;
4788 }
4789 }
4790 }
4791
Jay Vosburghfd989c82008-11-04 17:51:16 -08004792 if (ad_select) {
4793 params->ad_select = bond_parse_parm(ad_select, ad_select_tbl);
4794 if (params->ad_select == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004795 pr_err("Error: Invalid ad_select \"%s\"\n",
Jay Vosburghfd989c82008-11-04 17:51:16 -08004796 ad_select == NULL ? "NULL" : ad_select);
4797 return -EINVAL;
4798 }
4799
4800 if (bond_mode != BOND_MODE_8023AD) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004801 pr_warning("ad_select param only affects 802.3ad mode\n");
Jay Vosburghfd989c82008-11-04 17:51:16 -08004802 }
4803 } else {
4804 params->ad_select = BOND_AD_STABLE;
4805 }
4806
Nicolas de Pesloüanf5841302009-08-28 13:18:34 +00004807 if (max_bonds < 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004808 pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n",
4809 max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004810 max_bonds = BOND_DEFAULT_MAX_BONDS;
4811 }
4812
4813 if (miimon < 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004814 pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n",
4815 miimon, INT_MAX, BOND_LINK_MON_INTERV);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004816 miimon = BOND_LINK_MON_INTERV;
4817 }
4818
4819 if (updelay < 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004820 pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4821 updelay, INT_MAX);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004822 updelay = 0;
4823 }
4824
4825 if (downdelay < 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004826 pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n",
4827 downdelay, INT_MAX);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004828 downdelay = 0;
4829 }
4830
4831 if ((use_carrier != 0) && (use_carrier != 1)) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004832 pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n",
4833 use_carrier);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004834 use_carrier = 1;
4835 }
4836
Moni Shoua7893b242008-05-17 21:10:12 -07004837 if (num_grat_arp < 0 || num_grat_arp > 255) {
Frans Pop2381a552010-03-24 07:57:36 +00004838 pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004839 num_grat_arp);
Moni Shoua7893b242008-05-17 21:10:12 -07004840 num_grat_arp = 1;
4841 }
4842
Brian Haley305d5522008-11-04 17:51:14 -08004843 if (num_unsol_na < 0 || num_unsol_na > 255) {
Frans Pop2381a552010-03-24 07:57:36 +00004844 pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n",
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004845 num_unsol_na);
Brian Haley305d5522008-11-04 17:51:14 -08004846 num_unsol_na = 1;
4847 }
4848
Linus Torvalds1da177e2005-04-16 15:20:36 -07004849 /* reset values for 802.3ad */
4850 if (bond_mode == BOND_MODE_8023AD) {
4851 if (!miimon) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004852 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");
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004853 pr_warning("Forcing miimon to 100msec\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004854 miimon = 100;
4855 }
4856 }
4857
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00004858 if (tx_queues < 1 || tx_queues > 255) {
4859 pr_warning("Warning: tx_queues (%d) should be between "
4860 "1 and 255, resetting to %d\n",
4861 tx_queues, BOND_DEFAULT_TX_QUEUES);
4862 tx_queues = BOND_DEFAULT_TX_QUEUES;
4863 }
4864
Andy Gospodarekebd8e492010-06-02 08:39:21 +00004865 if ((all_slaves_active != 0) && (all_slaves_active != 1)) {
4866 pr_warning("Warning: all_slaves_active module parameter (%d), "
4867 "not of valid value (0/1), so it was set to "
4868 "0\n", all_slaves_active);
4869 all_slaves_active = 0;
4870 }
4871
Linus Torvalds1da177e2005-04-16 15:20:36 -07004872 /* reset values for TLB/ALB */
4873 if ((bond_mode == BOND_MODE_TLB) ||
4874 (bond_mode == BOND_MODE_ALB)) {
4875 if (!miimon) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004876 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");
Stephen Hemminger3d632c32009-06-12 19:02:48 +00004877 pr_warning("Forcing miimon to 100msec\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004878 miimon = 100;
4879 }
4880 }
4881
4882 if (bond_mode == BOND_MODE_ALB) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004883 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",
4884 updelay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004885 }
4886
4887 if (!miimon) {
4888 if (updelay || downdelay) {
4889 /* just warn the user the up/down delay will have
4890 * no effect since miimon is zero...
4891 */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004892 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",
4893 updelay, downdelay);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004894 }
4895 } else {
4896 /* don't allow arp monitoring */
4897 if (arp_interval) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004898 pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n",
4899 miimon, arp_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004900 arp_interval = 0;
4901 }
4902
4903 if ((updelay % miimon) != 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004904 pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n",
4905 updelay, miimon,
4906 (updelay / miimon) * miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004907 }
4908
4909 updelay /= miimon;
4910
4911 if ((downdelay % miimon) != 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004912 pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n",
4913 downdelay, miimon,
4914 (downdelay / miimon) * miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004915 }
4916
4917 downdelay /= miimon;
4918 }
4919
4920 if (arp_interval < 0) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004921 pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n",
4922 arp_interval, INT_MAX, BOND_LINK_ARP_INTERV);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004923 arp_interval = BOND_LINK_ARP_INTERV;
4924 }
4925
4926 for (arp_ip_count = 0;
4927 (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count];
4928 arp_ip_count++) {
4929 /* not complete check, but should be good enough to
4930 catch mistakes */
4931 if (!isdigit(arp_ip_target[arp_ip_count][0])) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004932 pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n",
4933 arp_ip_target[arp_ip_count]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004934 arp_interval = 0;
4935 } else {
Al Virod3bb52b2007-08-22 20:06:58 -04004936 __be32 ip = in_aton(arp_ip_target[arp_ip_count]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004937 arp_target[arp_ip_count] = ip;
4938 }
4939 }
4940
4941 if (arp_interval && !arp_ip_count) {
4942 /* don't allow arping if no arp_ip_target given... */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004943 pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n",
4944 arp_interval);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004945 arp_interval = 0;
4946 }
4947
Jay Vosburghf5b2b962006-09-22 21:54:53 -07004948 if (arp_validate) {
4949 if (bond_mode != BOND_MODE_ACTIVEBACKUP) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004950 pr_err("arp_validate only supported in active-backup mode\n");
Jay Vosburghf5b2b962006-09-22 21:54:53 -07004951 return -EINVAL;
4952 }
4953 if (!arp_interval) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004954 pr_err("arp_validate requires arp_interval\n");
Jay Vosburghf5b2b962006-09-22 21:54:53 -07004955 return -EINVAL;
4956 }
4957
4958 arp_validate_value = bond_parse_parm(arp_validate,
4959 arp_validate_tbl);
4960 if (arp_validate_value == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004961 pr_err("Error: invalid arp_validate \"%s\"\n",
Jay Vosburghf5b2b962006-09-22 21:54:53 -07004962 arp_validate == NULL ? "NULL" : arp_validate);
4963 return -EINVAL;
4964 }
4965 } else
4966 arp_validate_value = 0;
4967
Linus Torvalds1da177e2005-04-16 15:20:36 -07004968 if (miimon) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004969 pr_info("MII link monitoring set to %d ms\n", miimon);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004970 } else if (arp_interval) {
4971 int i;
4972
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004973 pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):",
4974 arp_interval,
4975 arp_validate_tbl[arp_validate_value].modename,
4976 arp_ip_count);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004977
4978 for (i = 0; i < arp_ip_count; i++)
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00004979 pr_info(" %s", arp_ip_target[i]);
Linus Torvalds1da177e2005-04-16 15:20:36 -07004980
Jiri Pirkoe5e2a8f2009-08-13 04:11:52 +00004981 pr_info("\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004982
Jay Vosburghb8a97872008-06-13 18:12:04 -07004983 } else if (max_bonds) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07004984 /* miimon and arp_interval not set, we need one so things
4985 * work as expected, see bonding.txt for details
4986 */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004987 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");
Linus Torvalds1da177e2005-04-16 15:20:36 -07004988 }
4989
4990 if (primary && !USES_PRIMARY(bond_mode)) {
4991 /* currently, using a primary only makes sense
4992 * in active backup, TLB or ALB modes
4993 */
Joe Perchesa4aee5c2009-12-13 20:06:07 -08004994 pr_warning("Warning: %s primary device specified but has no effect in %s mode\n",
4995 primary, bond_mode_name(bond_mode));
Linus Torvalds1da177e2005-04-16 15:20:36 -07004996 primary = NULL;
4997 }
4998
Jiri Pirkoa5499522009-09-25 03:28:09 +00004999 if (primary && primary_reselect) {
5000 primary_reselect_value = bond_parse_parm(primary_reselect,
5001 pri_reselect_tbl);
5002 if (primary_reselect_value == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08005003 pr_err("Error: Invalid primary_reselect \"%s\"\n",
Jiri Pirkoa5499522009-09-25 03:28:09 +00005004 primary_reselect ==
5005 NULL ? "NULL" : primary_reselect);
5006 return -EINVAL;
5007 }
5008 } else {
5009 primary_reselect_value = BOND_PRI_RESELECT_ALWAYS;
5010 }
5011
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07005012 if (fail_over_mac) {
5013 fail_over_mac_value = bond_parse_parm(fail_over_mac,
5014 fail_over_mac_tbl);
5015 if (fail_over_mac_value == -1) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08005016 pr_err("Error: invalid fail_over_mac \"%s\"\n",
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07005017 arp_validate == NULL ? "NULL" : arp_validate);
5018 return -EINVAL;
5019 }
5020
5021 if (bond_mode != BOND_MODE_ACTIVEBACKUP)
Joe Perchesa4aee5c2009-12-13 20:06:07 -08005022 pr_warning("Warning: fail_over_mac only affects active-backup mode.\n");
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07005023 } else {
5024 fail_over_mac_value = BOND_FOM_NONE;
5025 }
Jay Vosburghdd957c52007-10-09 19:57:24 -07005026
Linus Torvalds1da177e2005-04-16 15:20:36 -07005027 /* fill params struct with the proper values */
5028 params->mode = bond_mode;
Jay Vosburgh169a3e62005-06-26 17:54:11 -04005029 params->xmit_policy = xmit_hashtype;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005030 params->miimon = miimon;
Moni Shoua7893b242008-05-17 21:10:12 -07005031 params->num_grat_arp = num_grat_arp;
Brian Haley305d5522008-11-04 17:51:14 -08005032 params->num_unsol_na = num_unsol_na;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005033 params->arp_interval = arp_interval;
Jay Vosburghf5b2b962006-09-22 21:54:53 -07005034 params->arp_validate = arp_validate_value;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005035 params->updelay = updelay;
5036 params->downdelay = downdelay;
5037 params->use_carrier = use_carrier;
5038 params->lacp_fast = lacp_fast;
5039 params->primary[0] = 0;
Jiri Pirkoa5499522009-09-25 03:28:09 +00005040 params->primary_reselect = primary_reselect_value;
Jay Vosburgh3915c1e82008-05-17 21:10:14 -07005041 params->fail_over_mac = fail_over_mac_value;
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00005042 params->tx_queues = tx_queues;
Andy Gospodarekebd8e492010-06-02 08:39:21 +00005043 params->all_slaves_active = all_slaves_active;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005044
5045 if (primary) {
5046 strncpy(params->primary, primary, IFNAMSIZ);
5047 params->primary[IFNAMSIZ - 1] = 0;
5048 }
5049
5050 memcpy(params->arp_targets, arp_target, sizeof(arp_target));
5051
5052 return 0;
5053}
5054
Peter Zijlstra0daa23032006-11-08 19:51:01 -08005055static struct lock_class_key bonding_netdev_xmit_lock_key;
David S. Millercf508b12008-07-22 14:16:42 -07005056static struct lock_class_key bonding_netdev_addr_lock_key;
Peter Zijlstra0daa23032006-11-08 19:51:01 -08005057
David S. Millere8a04642008-07-17 00:34:19 -07005058static void bond_set_lockdep_class_one(struct net_device *dev,
5059 struct netdev_queue *txq,
5060 void *_unused)
David S. Millerc773e842008-07-08 23:13:53 -07005061{
5062 lockdep_set_class(&txq->_xmit_lock,
5063 &bonding_netdev_xmit_lock_key);
5064}
5065
5066static void bond_set_lockdep_class(struct net_device *dev)
5067{
David S. Millercf508b12008-07-22 14:16:42 -07005068 lockdep_set_class(&dev->addr_list_lock,
5069 &bonding_netdev_addr_lock_key);
David S. Millere8a04642008-07-17 00:34:19 -07005070 netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL);
David S. Millerc773e842008-07-08 23:13:53 -07005071}
5072
Stephen Hemminger181470f2009-06-12 19:02:52 +00005073/*
5074 * Called from registration process
5075 */
5076static int bond_init(struct net_device *bond_dev)
5077{
5078 struct bonding *bond = netdev_priv(bond_dev);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005079 struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id);
Stephen Hemminger181470f2009-06-12 19:02:52 +00005080
5081 pr_debug("Begin bond_init for %s\n", bond_dev->name);
5082
5083 bond->wq = create_singlethread_workqueue(bond_dev->name);
5084 if (!bond->wq)
5085 return -ENOMEM;
5086
5087 bond_set_lockdep_class(bond_dev);
5088
5089 netif_carrier_off(bond_dev);
5090
5091 bond_create_proc_entry(bond);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005092 list_add_tail(&bond->bond_list, &bn->dev_list);
Stephen Hemminger181470f2009-06-12 19:02:52 +00005093
Eric W. Biederman6151b3d2009-10-29 14:18:22 +00005094 bond_prepare_sysfs_group(bond);
Jiri Pirko22bedad32010-04-01 21:22:57 +00005095
5096 __hw_addr_init(&bond->mc_list);
Stephen Hemminger181470f2009-06-12 19:02:52 +00005097 return 0;
5098}
5099
Eric W. Biederman88ead972009-10-29 14:18:25 +00005100static int bond_validate(struct nlattr *tb[], struct nlattr *data[])
5101{
5102 if (tb[IFLA_ADDRESS]) {
5103 if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN)
5104 return -EINVAL;
5105 if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS])))
5106 return -EADDRNOTAVAIL;
5107 }
5108 return 0;
5109}
5110
5111static struct rtnl_link_ops bond_link_ops __read_mostly = {
5112 .kind = "bond",
Eric W. Biederman66391042009-10-29 23:58:54 +00005113 .priv_size = sizeof(struct bonding),
Eric W. Biederman88ead972009-10-29 14:18:25 +00005114 .setup = bond_setup,
5115 .validate = bond_validate,
5116};
5117
Mitch Williamsdfe60392005-11-09 10:36:04 -08005118/* Create a new bond based on the specified name and bonding parameters.
Jay Vosburghe4b91c42007-01-19 18:15:31 -08005119 * If name is NULL, obtain a suitable "bond%d" name for us.
Mitch Williamsdfe60392005-11-09 10:36:04 -08005120 * Caller must NOT hold rtnl_lock; we need to release it here before we
5121 * set up our sysfs entries.
5122 */
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005123int bond_create(struct net *net, const char *name)
Mitch Williamsdfe60392005-11-09 10:36:04 -08005124{
5125 struct net_device *bond_dev;
5126 int res;
5127
5128 rtnl_lock();
Jay Vosburgh027ea042008-01-17 16:25:02 -08005129
Andy Gospodarekbb1d9122010-06-02 08:40:18 +00005130 bond_dev = alloc_netdev_mq(sizeof(struct bonding), name ? name : "",
5131 bond_setup, tx_queues);
Mitch Williamsdfe60392005-11-09 10:36:04 -08005132 if (!bond_dev) {
Joe Perchesa4aee5c2009-12-13 20:06:07 -08005133 pr_err("%s: eek! can't alloc netdev!\n", name);
Amerigo Wang9e2e61f2010-03-31 21:30:52 +00005134 rtnl_unlock();
5135 return -ENOMEM;
Mitch Williamsdfe60392005-11-09 10:36:04 -08005136 }
5137
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005138 dev_net_set(bond_dev, net);
Eric W. Biederman88ead972009-10-29 14:18:25 +00005139 bond_dev->rtnl_link_ops = &bond_link_ops;
5140
Jay Vosburghe4b91c42007-01-19 18:15:31 -08005141 if (!name) {
5142 res = dev_alloc_name(bond_dev, "bond%d");
5143 if (res < 0)
Amerigo Wang9e2e61f2010-03-31 21:30:52 +00005144 goto out;
Jay Vosburghe4b91c42007-01-19 18:15:31 -08005145 }
5146
Mitch Williamsdfe60392005-11-09 10:36:04 -08005147 res = register_netdevice(bond_dev);
Peter Zijlstra0daa23032006-11-08 19:51:01 -08005148
Eric W. Biederman30c15ba2009-10-29 14:18:23 +00005149out:
Mitch Williamsdfe60392005-11-09 10:36:04 -08005150 rtnl_unlock();
Amerigo Wang9e2e61f2010-03-31 21:30:52 +00005151 if (res < 0)
5152 bond_destructor(bond_dev);
Mitch Williamsdfe60392005-11-09 10:36:04 -08005153 return res;
5154}
5155
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005156static int __net_init bond_net_init(struct net *net)
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005157{
Eric W. Biederman15449742009-11-29 15:46:04 +00005158 struct bond_net *bn = net_generic(net, bond_net_id);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005159
5160 bn->net = net;
5161 INIT_LIST_HEAD(&bn->dev_list);
5162
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005163 bond_create_proc_dir(bn);
Eric W. Biederman15449742009-11-29 15:46:04 +00005164
5165 return 0;
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005166}
5167
Alexey Dobriyan2c8c1e72010-01-17 03:35:32 +00005168static void __net_exit bond_net_exit(struct net *net)
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005169{
Eric W. Biederman15449742009-11-29 15:46:04 +00005170 struct bond_net *bn = net_generic(net, bond_net_id);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005171
5172 bond_destroy_proc_dir(bn);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005173}
5174
5175static struct pernet_operations bond_net_ops = {
5176 .init = bond_net_init,
5177 .exit = bond_net_exit,
Eric W. Biederman15449742009-11-29 15:46:04 +00005178 .id = &bond_net_id,
5179 .size = sizeof(struct bond_net),
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005180};
5181
Linus Torvalds1da177e2005-04-16 15:20:36 -07005182static int __init bonding_init(void)
5183{
Linus Torvalds1da177e2005-04-16 15:20:36 -07005184 int i;
5185 int res;
5186
Stephen Hemminger3d632c32009-06-12 19:02:48 +00005187 pr_info("%s", version);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005188
Mitch Williamsdfe60392005-11-09 10:36:04 -08005189 res = bond_check_params(&bonding_defaults);
Stephen Hemminger3d632c32009-06-12 19:02:48 +00005190 if (res)
Mitch Williamsdfe60392005-11-09 10:36:04 -08005191 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005192
Eric W. Biederman15449742009-11-29 15:46:04 +00005193 res = register_pernet_subsys(&bond_net_ops);
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005194 if (res)
5195 goto out;
Jay Vosburgh027ea042008-01-17 16:25:02 -08005196
Eric W. Biederman88ead972009-10-29 14:18:25 +00005197 res = rtnl_link_register(&bond_link_ops);
5198 if (res)
Eric W. Biederman66391042009-10-29 23:58:54 +00005199 goto err_link;
Eric W. Biederman88ead972009-10-29 14:18:25 +00005200
Linus Torvalds1da177e2005-04-16 15:20:36 -07005201 for (i = 0; i < max_bonds; i++) {
Eric W. Biedermanec87fd32009-10-29 14:18:26 +00005202 res = bond_create(&init_net, NULL);
Mitch Williamsdfe60392005-11-09 10:36:04 -08005203 if (res)
5204 goto err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07005205 }
5206
Mitch Williamsb76cdba2005-11-09 10:36:41 -08005207 res = bond_create_sysfs();
5208 if (res)
5209 goto err;
5210
Linus Torvalds1da177e2005-04-16 15:20:36 -07005211 register_netdevice_notifier(&bond_netdev_notifier);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04005212 register_inetaddr_notifier(&bond_inetaddr_notifier);
Brian Haley305d5522008-11-04 17:51:14 -08005213 bond_register_ipv6_notifier();
Mitch Williamsdfe60392005-11-09 10:36:04 -08005214out:
Linus Torvalds1da177e2005-04-16 15:20:36 -07005215 return res;
Eric W. Biederman88ead972009-10-29 14:18:25 +00005216err:
5217 rtnl_link_unregister(&bond_link_ops);
Eric W. Biederman66391042009-10-29 23:58:54 +00005218err_link:
Eric W. Biederman15449742009-11-29 15:46:04 +00005219 unregister_pernet_subsys(&bond_net_ops);
Eric W. Biederman88ead972009-10-29 14:18:25 +00005220 goto out;
Mitch Williamsdfe60392005-11-09 10:36:04 -08005221
Linus Torvalds1da177e2005-04-16 15:20:36 -07005222}
5223
5224static void __exit bonding_exit(void)
5225{
5226 unregister_netdevice_notifier(&bond_netdev_notifier);
Jay Vosburghc3ade5c2005-06-26 17:52:20 -04005227 unregister_inetaddr_notifier(&bond_inetaddr_notifier);
Brian Haley305d5522008-11-04 17:51:14 -08005228 bond_unregister_ipv6_notifier();
Linus Torvalds1da177e2005-04-16 15:20:36 -07005229
Pavel Emelyanovae68c392008-05-02 17:49:39 -07005230 bond_destroy_sysfs();
5231
Eric W. Biederman88ead972009-10-29 14:18:25 +00005232 rtnl_link_unregister(&bond_link_ops);
Eric W. Biederman15449742009-11-29 15:46:04 +00005233 unregister_pernet_subsys(&bond_net_ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07005234}
5235
5236module_init(bonding_init);
5237module_exit(bonding_exit);
5238MODULE_LICENSE("GPL");
5239MODULE_VERSION(DRV_VERSION);
5240MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION);
5241MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others");
Eric W. Biederman88ead972009-10-29 14:18:25 +00005242MODULE_ALIAS_RTNL_LINK("bond");