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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
a4aee5c8 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
3d632c3f | 56 | #include <linux/io.h> |
1da177e4 | 57 | #include <asm/system.h> |
1da177e4 | 58 | #include <asm/dma.h> |
3d632c3f | 59 | #include <linux/uaccess.h> |
1da177e4 LT |
60 | #include <linux/errno.h> |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/inetdevice.h> | |
a816c7c7 | 63 | #include <linux/igmp.h> |
1da177e4 LT |
64 | #include <linux/etherdevice.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
67 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
68 | #include <linux/smp.h> |
69 | #include <linux/if_ether.h> | |
70 | #include <net/arp.h> | |
71 | #include <linux/mii.h> | |
72 | #include <linux/ethtool.h> | |
73 | #include <linux/if_vlan.h> | |
74 | #include <linux/if_bonding.h> | |
b63bb739 | 75 | #include <linux/jiffies.h> |
e843fa50 | 76 | #include <linux/preempt.h> |
c3ade5ca | 77 | #include <net/route.h> |
457c4cbc | 78 | #include <net/net_namespace.h> |
ec87fd3b | 79 | #include <net/netns/generic.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
87 | #define BOND_LINK_MON_INTERV 0 | |
88 | #define BOND_LINK_ARP_INTERV 0 | |
89 | ||
90 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 91 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 92 | static int num_peer_notif = 1; |
1da177e4 | 93 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
94 | static int updelay; |
95 | static int downdelay; | |
1da177e4 | 96 | static int use_carrier = 1; |
3d632c3f SH |
97 | static char *mode; |
98 | static char *primary; | |
a549952a | 99 | static char *primary_reselect; |
3d632c3f | 100 | static char *lacp_rate; |
655f8919 | 101 | static int min_links; |
3d632c3f SH |
102 | static char *ad_select; |
103 | static char *xmit_hash_policy; | |
1da177e4 | 104 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
105 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
106 | static char *arp_validate; | |
107 | static char *fail_over_mac; | |
ebd8e497 | 108 | static int all_slaves_active = 0; |
d2991f75 | 109 | static struct bond_params bonding_defaults; |
c2952c31 | 110 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
1da177e4 LT |
111 | |
112 | module_param(max_bonds, int, 0); | |
113 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
114 | module_param(tx_queues, int, 0); |
115 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 | 116 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
90e62474 AG |
117 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
118 | "failover event (alias of num_unsol_na)"); | |
ad246c99 | 119 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
90e62474 AG |
120 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
121 | "failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
122 | module_param(miimon, int, 0); |
123 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
124 | module_param(updelay, int, 0); | |
125 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
126 | module_param(downdelay, int, 0); | |
2ac47660 MW |
127 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
128 | "in milliseconds"); | |
1da177e4 | 129 | module_param(use_carrier, int, 0); |
2ac47660 MW |
130 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
131 | "0 for off, 1 for on (default)"); | |
1da177e4 | 132 | module_param(mode, charp, 0); |
90e62474 | 133 | MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
2ac47660 MW |
134 | "1 for active-backup, 2 for balance-xor, " |
135 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
136 | "6 for balance-alb"); | |
1da177e4 LT |
137 | module_param(primary, charp, 0); |
138 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
139 | module_param(primary_reselect, charp, 0); |
140 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
141 | "once it comes up; " | |
142 | "0 for always (default), " | |
143 | "1 for only if speed of primary is " | |
144 | "better, " | |
145 | "2 for only on active slave " | |
146 | "failure"); | |
1da177e4 | 147 | module_param(lacp_rate, charp, 0); |
90e62474 AG |
148 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
149 | "0 for slow, 1 for fast"); | |
fd989c83 | 150 | module_param(ad_select, charp, 0); |
90e62474 AG |
151 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; " |
152 | "0 for stable (default), 1 for bandwidth, " | |
153 | "2 for count"); | |
655f8919 | 154 | module_param(min_links, int, 0); |
155 | MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); | |
156 | ||
169a3e66 | 157 | module_param(xmit_hash_policy, charp, 0); |
90e62474 AG |
158 | MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; " |
159 | "0 for layer 2 (default), 1 for layer 3+4, " | |
160 | "2 for layer 2+3"); | |
1da177e4 LT |
161 | module_param(arp_interval, int, 0); |
162 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
163 | module_param_array(arp_ip_target, charp, NULL, 0); | |
164 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 | 165 | module_param(arp_validate, charp, 0); |
90e62474 AG |
166 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
167 | "0 for none (default), 1 for active, " | |
168 | "2 for backup, 3 for all"); | |
3915c1e8 | 169 | module_param(fail_over_mac, charp, 0); |
90e62474 AG |
170 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
171 | "the same MAC; 0 for none (default), " | |
172 | "1 for active, 2 for follow"); | |
ebd8e497 AG |
173 | module_param(all_slaves_active, int, 0); |
174 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
90e62474 | 175 | "by setting active flag for all slaves; " |
ebd8e497 | 176 | "0 for never (default), 1 for always."); |
c2952c31 | 177 | module_param(resend_igmp, int, 0); |
90e62474 AG |
178 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
179 | "link failure"); | |
1da177e4 LT |
180 | |
181 | /*----------------------------- Global variables ----------------------------*/ | |
182 | ||
e843fa50 | 183 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 184 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
185 | #endif |
186 | ||
f99189b1 | 187 | int bond_net_id __read_mostly; |
1da177e4 | 188 | |
3d632c3f SH |
189 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
190 | static int arp_ip_count; | |
1da177e4 | 191 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
192 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
193 | static int lacp_fast; | |
1da177e4 | 194 | |
e97fd7c6 | 195 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
196 | { "slow", AD_LACP_SLOW}, |
197 | { "fast", AD_LACP_FAST}, | |
198 | { NULL, -1}, | |
199 | }; | |
200 | ||
e97fd7c6 | 201 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
202 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
203 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
204 | { "balance-xor", BOND_MODE_XOR}, | |
205 | { "broadcast", BOND_MODE_BROADCAST}, | |
206 | { "802.3ad", BOND_MODE_8023AD}, | |
207 | { "balance-tlb", BOND_MODE_TLB}, | |
208 | { "balance-alb", BOND_MODE_ALB}, | |
209 | { NULL, -1}, | |
210 | }; | |
211 | ||
e97fd7c6 | 212 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
213 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
214 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 215 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
216 | { NULL, -1}, |
217 | }; | |
218 | ||
e97fd7c6 | 219 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
220 | { "none", BOND_ARP_VALIDATE_NONE}, |
221 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
222 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
223 | { "all", BOND_ARP_VALIDATE_ALL}, | |
224 | { NULL, -1}, | |
225 | }; | |
226 | ||
e97fd7c6 | 227 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
228 | { "none", BOND_FOM_NONE}, |
229 | { "active", BOND_FOM_ACTIVE}, | |
230 | { "follow", BOND_FOM_FOLLOW}, | |
231 | { NULL, -1}, | |
232 | }; | |
233 | ||
a549952a JP |
234 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
235 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
236 | { "better", BOND_PRI_RESELECT_BETTER}, | |
237 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
238 | { NULL, -1}, | |
239 | }; | |
240 | ||
fd989c83 JV |
241 | struct bond_parm_tbl ad_select_tbl[] = { |
242 | { "stable", BOND_AD_STABLE}, | |
243 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
244 | { "count", BOND_AD_COUNT}, | |
245 | { NULL, -1}, | |
246 | }; | |
247 | ||
1da177e4 LT |
248 | /*-------------------------- Forward declarations ---------------------------*/ |
249 | ||
181470fc | 250 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 251 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
252 | |
253 | /*---------------------------- General routines -----------------------------*/ | |
254 | ||
bd33acc3 | 255 | const char *bond_mode_name(int mode) |
1da177e4 | 256 | { |
77afc92b HE |
257 | static const char *names[] = { |
258 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
259 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
260 | [BOND_MODE_XOR] = "load balancing (xor)", | |
261 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 262 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
263 | [BOND_MODE_TLB] = "transmit load balancing", |
264 | [BOND_MODE_ALB] = "adaptive load balancing", | |
265 | }; | |
266 | ||
267 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 268 | return "unknown"; |
77afc92b HE |
269 | |
270 | return names[mode]; | |
1da177e4 LT |
271 | } |
272 | ||
273 | /*---------------------------------- VLAN -----------------------------------*/ | |
274 | ||
275 | /** | |
276 | * bond_add_vlan - add a new vlan id on bond | |
277 | * @bond: bond that got the notification | |
278 | * @vlan_id: the vlan id to add | |
279 | * | |
280 | * Returns -ENOMEM if allocation failed. | |
281 | */ | |
282 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
283 | { | |
284 | struct vlan_entry *vlan; | |
285 | ||
5a03cdb7 | 286 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 287 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 288 | |
305d552a | 289 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 290 | if (!vlan) |
1da177e4 | 291 | return -ENOMEM; |
1da177e4 LT |
292 | |
293 | INIT_LIST_HEAD(&vlan->vlan_list); | |
294 | vlan->vlan_id = vlan_id; | |
295 | ||
296 | write_lock_bh(&bond->lock); | |
297 | ||
298 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
299 | ||
300 | write_unlock_bh(&bond->lock); | |
301 | ||
5a03cdb7 | 302 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
303 | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /** | |
308 | * bond_del_vlan - delete a vlan id from bond | |
309 | * @bond: bond that got the notification | |
310 | * @vlan_id: the vlan id to delete | |
311 | * | |
312 | * returns -ENODEV if @vlan_id was not found in @bond. | |
313 | */ | |
314 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
315 | { | |
0883beca | 316 | struct vlan_entry *vlan; |
1da177e4 LT |
317 | int res = -ENODEV; |
318 | ||
5a03cdb7 | 319 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 | 320 | |
e843fa50 | 321 | block_netpoll_tx(); |
1da177e4 LT |
322 | write_lock_bh(&bond->lock); |
323 | ||
0883beca | 324 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
325 | if (vlan->vlan_id == vlan_id) { |
326 | list_del(&vlan->vlan_list); | |
327 | ||
58402054 | 328 | if (bond_is_lb(bond)) |
1da177e4 | 329 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 330 | |
a4aee5c8 JP |
331 | pr_debug("removed VLAN ID %d from bond %s\n", |
332 | vlan_id, bond->dev->name); | |
1da177e4 LT |
333 | |
334 | kfree(vlan); | |
335 | ||
1da177e4 LT |
336 | res = 0; |
337 | goto out; | |
338 | } | |
339 | } | |
340 | ||
a4aee5c8 JP |
341 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
342 | vlan_id, bond->dev->name); | |
1da177e4 LT |
343 | |
344 | out: | |
345 | write_unlock_bh(&bond->lock); | |
e843fa50 | 346 | unblock_netpoll_tx(); |
1da177e4 LT |
347 | return res; |
348 | } | |
349 | ||
1da177e4 LT |
350 | /** |
351 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
352 | * @bond: the bond we're working on | |
353 | * @curr: item we're advancing from | |
354 | * | |
355 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
356 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 357 | * |
1da177e4 LT |
358 | * Caller must hold bond->lock |
359 | */ | |
360 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
361 | { | |
362 | struct vlan_entry *next, *last; | |
363 | ||
3d632c3f | 364 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 365 | return NULL; |
1da177e4 LT |
366 | |
367 | if (!curr) { | |
368 | next = list_entry(bond->vlan_list.next, | |
369 | struct vlan_entry, vlan_list); | |
370 | } else { | |
371 | last = list_entry(bond->vlan_list.prev, | |
372 | struct vlan_entry, vlan_list); | |
373 | if (last == curr) { | |
374 | next = list_entry(bond->vlan_list.next, | |
375 | struct vlan_entry, vlan_list); | |
376 | } else { | |
377 | next = list_entry(curr->vlan_list.next, | |
378 | struct vlan_entry, vlan_list); | |
379 | } | |
380 | } | |
381 | ||
382 | return next; | |
383 | } | |
384 | ||
374eeb5a NH |
385 | #define bond_queue_mapping(skb) (*(u16 *)((skb)->cb)) |
386 | ||
1da177e4 LT |
387 | /** |
388 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 389 | * |
1da177e4 LT |
390 | * @bond: bond device that got this skb for tx. |
391 | * @skb: hw accel VLAN tagged skb to transmit | |
392 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 393 | */ |
3d632c3f SH |
394 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
395 | struct net_device *slave_dev) | |
1da177e4 | 396 | { |
8387451e | 397 | skb->dev = slave_dev; |
374eeb5a NH |
398 | |
399 | skb->queue_mapping = bond_queue_mapping(skb); | |
400 | ||
080e4130 | 401 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 402 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 403 | else |
f6dc31a8 | 404 | dev_queue_xmit(skb); |
1da177e4 LT |
405 | |
406 | return 0; | |
407 | } | |
408 | ||
409 | /* | |
cc0e4070 JP |
410 | * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, |
411 | * We don't protect the slave list iteration with a lock because: | |
1da177e4 LT |
412 | * a. This operation is performed in IOCTL context, |
413 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
414 | * c. Holding a lock with BH disabled while directly calling a base driver | |
415 | * entry point is generally a BAD idea. | |
3d632c3f | 416 | * |
1da177e4 LT |
417 | * The design of synchronization/protection for this operation in the 8021q |
418 | * module is good for one or more VLAN devices over a single physical device | |
419 | * and cannot be extended for a teaming solution like bonding, so there is a | |
420 | * potential race condition here where a net device from the vlan group might | |
421 | * be referenced (either by a base driver or the 8021q code) while it is being | |
422 | * removed from the system. However, it turns out we're not making matters | |
423 | * worse, and if it works for regular VLAN usage it will work here too. | |
424 | */ | |
425 | ||
1da177e4 LT |
426 | /** |
427 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
428 | * @bond_dev: bonding net device that got called | |
429 | * @vid: vlan id being added | |
430 | */ | |
431 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
432 | { | |
454d7c9b | 433 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
434 | struct slave *slave; |
435 | int i, res; | |
436 | ||
437 | bond_for_each_slave(bond, slave, i) { | |
438 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 439 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
440 | |
441 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
442 | slave_ops->ndo_vlan_rx_add_vid) { |
443 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
444 | } |
445 | } | |
446 | ||
447 | res = bond_add_vlan(bond, vid); | |
448 | if (res) { | |
a4aee5c8 | 449 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
450 | bond_dev->name, vid); |
451 | } | |
452 | } | |
453 | ||
454 | /** | |
455 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
456 | * @bond_dev: bonding net device that got called | |
457 | * @vid: vlan id being removed | |
458 | */ | |
459 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
460 | { | |
454d7c9b | 461 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 462 | struct slave *slave; |
1da177e4 LT |
463 | int i, res; |
464 | ||
465 | bond_for_each_slave(bond, slave, i) { | |
466 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 467 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
468 | |
469 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 470 | slave_ops->ndo_vlan_rx_kill_vid) { |
eb7cc59a | 471 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
1da177e4 LT |
472 | } |
473 | } | |
474 | ||
475 | res = bond_del_vlan(bond, vid); | |
476 | if (res) { | |
a4aee5c8 | 477 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
478 | bond_dev->name, vid); |
479 | } | |
480 | } | |
481 | ||
482 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
483 | { | |
484 | struct vlan_entry *vlan; | |
eb7cc59a | 485 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 486 | |
1da177e4 | 487 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || |
eb7cc59a | 488 | !(slave_ops->ndo_vlan_rx_add_vid)) |
03dc2f4c | 489 | return; |
1da177e4 | 490 | |
eb7cc59a SH |
491 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
492 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
493 | } |
494 | ||
3d632c3f SH |
495 | static void bond_del_vlans_from_slave(struct bonding *bond, |
496 | struct net_device *slave_dev) | |
1da177e4 | 497 | { |
eb7cc59a | 498 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 499 | struct vlan_entry *vlan; |
1da177e4 LT |
500 | |
501 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 502 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
cc0e4070 | 503 | return; |
1da177e4 LT |
504 | |
505 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
f35188fa JV |
506 | if (!vlan->vlan_id) |
507 | continue; | |
eb7cc59a | 508 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
1da177e4 | 509 | } |
1da177e4 LT |
510 | } |
511 | ||
512 | /*------------------------------- Link status -------------------------------*/ | |
513 | ||
ff59c456 JV |
514 | /* |
515 | * Set the carrier state for the master according to the state of its | |
516 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
517 | * do special 802.3ad magic. | |
518 | * | |
519 | * Returns zero if carrier state does not change, nonzero if it does. | |
520 | */ | |
521 | static int bond_set_carrier(struct bonding *bond) | |
522 | { | |
523 | struct slave *slave; | |
524 | int i; | |
525 | ||
526 | if (bond->slave_cnt == 0) | |
527 | goto down; | |
528 | ||
529 | if (bond->params.mode == BOND_MODE_8023AD) | |
530 | return bond_3ad_set_carrier(bond); | |
531 | ||
532 | bond_for_each_slave(bond, slave, i) { | |
533 | if (slave->link == BOND_LINK_UP) { | |
534 | if (!netif_carrier_ok(bond->dev)) { | |
535 | netif_carrier_on(bond->dev); | |
536 | return 1; | |
537 | } | |
538 | return 0; | |
539 | } | |
540 | } | |
541 | ||
542 | down: | |
543 | if (netif_carrier_ok(bond->dev)) { | |
544 | netif_carrier_off(bond->dev); | |
545 | return 1; | |
546 | } | |
547 | return 0; | |
548 | } | |
549 | ||
1da177e4 LT |
550 | /* |
551 | * Get link speed and duplex from the slave's base driver | |
552 | * using ethtool. If for some reason the call fails or the | |
553 | * values are invalid, fake speed and duplex to 100/Full | |
554 | * and return error. | |
555 | */ | |
556 | static int bond_update_speed_duplex(struct slave *slave) | |
557 | { | |
558 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 559 | struct ethtool_cmd ecmd; |
5d30530e | 560 | u32 slave_speed; |
61a44b9c | 561 | int res; |
1da177e4 LT |
562 | |
563 | /* Fake speed and duplex */ | |
564 | slave->speed = SPEED_100; | |
565 | slave->duplex = DUPLEX_FULL; | |
566 | ||
4bc71cb9 | 567 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 568 | if (res < 0) |
1da177e4 | 569 | return -1; |
1da177e4 | 570 | |
4bc71cb9 | 571 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 572 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
1da177e4 | 573 | return -1; |
1da177e4 | 574 | |
4bc71cb9 | 575 | switch (ecmd.duplex) { |
1da177e4 LT |
576 | case DUPLEX_FULL: |
577 | case DUPLEX_HALF: | |
578 | break; | |
579 | default: | |
580 | return -1; | |
581 | } | |
582 | ||
5d30530e | 583 | slave->speed = slave_speed; |
4bc71cb9 | 584 | slave->duplex = ecmd.duplex; |
1da177e4 LT |
585 | |
586 | return 0; | |
587 | } | |
588 | ||
589 | /* | |
590 | * if <dev> supports MII link status reporting, check its link status. | |
591 | * | |
592 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 593 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
594 | * |
595 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
596 | * can't tell and just pretend it is), or 0, meaning that the link is | |
597 | * down. | |
598 | * | |
599 | * If reporting is non-zero, instead of faking link up, return -1 if | |
600 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
601 | * support them). If use_carrier is set, return whatever it says. | |
602 | * It'd be nice if there was a good way to tell if a driver supports | |
603 | * netif_carrier, but there really isn't. | |
604 | */ | |
3d632c3f SH |
605 | static int bond_check_dev_link(struct bonding *bond, |
606 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 607 | { |
eb7cc59a | 608 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 609 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
610 | struct ifreq ifr; |
611 | struct mii_ioctl_data *mii; | |
1da177e4 | 612 | |
6c988853 PG |
613 | if (!reporting && !netif_running(slave_dev)) |
614 | return 0; | |
615 | ||
eb7cc59a | 616 | if (bond->params.use_carrier) |
1da177e4 | 617 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 618 | |
29112f4e JP |
619 | /* Try to get link status using Ethtool first. */ |
620 | if (slave_dev->ethtool_ops) { | |
621 | if (slave_dev->ethtool_ops->get_link) { | |
622 | u32 link; | |
623 | ||
624 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
625 | ||
626 | return link ? BMSR_LSTATUS : 0; | |
627 | } | |
628 | } | |
629 | ||
3d632c3f | 630 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 631 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
632 | if (ioctl) { |
633 | /* TODO: set pointer to correct ioctl on a per team member */ | |
634 | /* bases to make this more efficient. that is, once */ | |
635 | /* we determine the correct ioctl, we will always */ | |
636 | /* call it and not the others for that team */ | |
637 | /* member. */ | |
638 | ||
639 | /* | |
640 | * We cannot assume that SIOCGMIIPHY will also read a | |
641 | * register; not all network drivers (e.g., e100) | |
642 | * support that. | |
643 | */ | |
644 | ||
645 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
646 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
647 | mii = if_mii(&ifr); | |
648 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
649 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
650 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
651 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
652 | } |
653 | } | |
654 | ||
1da177e4 LT |
655 | /* |
656 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 657 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
658 | * cannot report link status). If not reporting, pretend |
659 | * we're ok. | |
660 | */ | |
3d632c3f | 661 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
662 | } |
663 | ||
664 | /*----------------------------- Multicast list ------------------------------*/ | |
665 | ||
1da177e4 LT |
666 | /* |
667 | * Push the promiscuity flag down to appropriate slaves | |
668 | */ | |
7e1a1ac1 | 669 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 670 | { |
7e1a1ac1 | 671 | int err = 0; |
1da177e4 LT |
672 | if (USES_PRIMARY(bond->params.mode)) { |
673 | /* write lock already acquired */ | |
674 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
675 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
676 | inc); | |
1da177e4 LT |
677 | } |
678 | } else { | |
679 | struct slave *slave; | |
680 | int i; | |
681 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
682 | err = dev_set_promiscuity(slave->dev, inc); |
683 | if (err) | |
684 | return err; | |
1da177e4 LT |
685 | } |
686 | } | |
7e1a1ac1 | 687 | return err; |
1da177e4 LT |
688 | } |
689 | ||
690 | /* | |
691 | * Push the allmulti flag down to all slaves | |
692 | */ | |
7e1a1ac1 | 693 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 694 | { |
7e1a1ac1 | 695 | int err = 0; |
1da177e4 LT |
696 | if (USES_PRIMARY(bond->params.mode)) { |
697 | /* write lock already acquired */ | |
698 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
699 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
700 | inc); | |
1da177e4 LT |
701 | } |
702 | } else { | |
703 | struct slave *slave; | |
704 | int i; | |
705 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
706 | err = dev_set_allmulti(slave->dev, inc); |
707 | if (err) | |
708 | return err; | |
1da177e4 LT |
709 | } |
710 | } | |
7e1a1ac1 | 711 | return err; |
1da177e4 LT |
712 | } |
713 | ||
714 | /* | |
715 | * Add a Multicast address to slaves | |
716 | * according to mode | |
717 | */ | |
22bedad3 | 718 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
719 | { |
720 | if (USES_PRIMARY(bond->params.mode)) { | |
721 | /* write lock already acquired */ | |
3d632c3f | 722 | if (bond->curr_active_slave) |
22bedad3 | 723 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
724 | } else { |
725 | struct slave *slave; | |
726 | int i; | |
3d632c3f SH |
727 | |
728 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 729 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
730 | } |
731 | } | |
732 | ||
733 | /* | |
734 | * Remove a multicast address from slave | |
735 | * according to mode | |
736 | */ | |
22bedad3 | 737 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
738 | { |
739 | if (USES_PRIMARY(bond->params.mode)) { | |
740 | /* write lock already acquired */ | |
3d632c3f | 741 | if (bond->curr_active_slave) |
22bedad3 | 742 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
743 | } else { |
744 | struct slave *slave; | |
745 | int i; | |
746 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 747 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
748 | } |
749 | } | |
750 | } | |
751 | ||
a816c7c7 | 752 | |
5a37e8ca | 753 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
754 | { |
755 | struct in_device *in_dev; | |
a816c7c7 JV |
756 | |
757 | rcu_read_lock(); | |
5a37e8ca | 758 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 759 | if (in_dev) |
24912420 | 760 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
761 | rcu_read_unlock(); |
762 | } | |
763 | ||
5a37e8ca FL |
764 | /* |
765 | * Retrieve the list of registered multicast addresses for the bonding | |
766 | * device and retransmit an IGMP JOIN request to the current active | |
767 | * slave. | |
768 | */ | |
769 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
770 | { | |
771 | struct net_device *vlan_dev; | |
772 | struct vlan_entry *vlan; | |
773 | ||
774 | read_lock(&bond->lock); | |
775 | ||
776 | /* rejoin all groups on bond device */ | |
777 | __bond_resend_igmp_join_requests(bond->dev); | |
778 | ||
779 | /* rejoin all groups on vlan devices */ | |
cc0e4070 JP |
780 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
781 | rcu_read_lock(); | |
782 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
783 | vlan->vlan_id); | |
784 | rcu_read_unlock(); | |
785 | if (vlan_dev) | |
786 | __bond_resend_igmp_join_requests(vlan_dev); | |
5a37e8ca FL |
787 | } |
788 | ||
e6d265e8 | 789 | if (--bond->igmp_retrans > 0) |
c2952c31 | 790 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
e6d265e8 | 791 | |
5a37e8ca FL |
792 | read_unlock(&bond->lock); |
793 | } | |
794 | ||
379b7383 | 795 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
796 | { |
797 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 798 | mcast_work.work); |
5a37e8ca FL |
799 | bond_resend_igmp_join_requests(bond); |
800 | } | |
801 | ||
1da177e4 LT |
802 | /* |
803 | * flush all members of flush->mc_list from device dev->mc_list | |
804 | */ | |
3d632c3f SH |
805 | static void bond_mc_list_flush(struct net_device *bond_dev, |
806 | struct net_device *slave_dev) | |
1da177e4 | 807 | { |
454d7c9b | 808 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 809 | struct netdev_hw_addr *ha; |
1da177e4 | 810 | |
22bedad3 JP |
811 | netdev_for_each_mc_addr(ha, bond_dev) |
812 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
813 | |
814 | if (bond->params.mode == BOND_MODE_8023AD) { | |
815 | /* del lacpdu mc addr from mc list */ | |
816 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
817 | ||
22bedad3 | 818 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
819 | } |
820 | } | |
821 | ||
822 | /*--------------------------- Active slave change ---------------------------*/ | |
823 | ||
824 | /* | |
825 | * Update the mc list and multicast-related flags for the new and | |
826 | * old active slaves (if any) according to the multicast mode, and | |
827 | * promiscuous flags unconditionally. | |
828 | */ | |
3d632c3f SH |
829 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
830 | struct slave *old_active) | |
1da177e4 | 831 | { |
22bedad3 | 832 | struct netdev_hw_addr *ha; |
1da177e4 | 833 | |
3d632c3f | 834 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
835 | /* nothing to do - mc list is already up-to-date on |
836 | * all slaves | |
837 | */ | |
838 | return; | |
1da177e4 LT |
839 | |
840 | if (old_active) { | |
3d632c3f | 841 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 842 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 843 | |
3d632c3f | 844 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 845 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 846 | |
22bedad3 JP |
847 | netdev_for_each_mc_addr(ha, bond->dev) |
848 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
849 | } |
850 | ||
851 | if (new_active) { | |
7e1a1ac1 | 852 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 853 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 854 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 855 | |
3d632c3f | 856 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 857 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 858 | |
22bedad3 JP |
859 | netdev_for_each_mc_addr(ha, bond->dev) |
860 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
861 | } |
862 | } | |
863 | ||
3915c1e8 JV |
864 | /* |
865 | * bond_do_fail_over_mac | |
866 | * | |
867 | * Perform special MAC address swapping for fail_over_mac settings | |
868 | * | |
869 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
870 | */ | |
871 | static void bond_do_fail_over_mac(struct bonding *bond, | |
872 | struct slave *new_active, | |
873 | struct slave *old_active) | |
1f78d9f9 HE |
874 | __releases(&bond->curr_slave_lock) |
875 | __releases(&bond->lock) | |
876 | __acquires(&bond->lock) | |
877 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
878 | { |
879 | u8 tmp_mac[ETH_ALEN]; | |
880 | struct sockaddr saddr; | |
881 | int rv; | |
882 | ||
883 | switch (bond->params.fail_over_mac) { | |
884 | case BOND_FOM_ACTIVE: | |
885 | if (new_active) | |
886 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
887 | new_active->dev->addr_len); | |
888 | break; | |
889 | case BOND_FOM_FOLLOW: | |
890 | /* | |
891 | * if new_active && old_active, swap them | |
892 | * if just old_active, do nothing (going to no active slave) | |
893 | * if just new_active, set new_active to bond's MAC | |
894 | */ | |
895 | if (!new_active) | |
896 | return; | |
897 | ||
898 | write_unlock_bh(&bond->curr_slave_lock); | |
899 | read_unlock(&bond->lock); | |
900 | ||
901 | if (old_active) { | |
902 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
903 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
904 | ETH_ALEN); | |
905 | saddr.sa_family = new_active->dev->type; | |
906 | } else { | |
907 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
908 | saddr.sa_family = bond->dev->type; | |
909 | } | |
910 | ||
911 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
912 | if (rv) { | |
a4aee5c8 | 913 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
914 | bond->dev->name, -rv, new_active->dev->name); |
915 | goto out; | |
916 | } | |
917 | ||
918 | if (!old_active) | |
919 | goto out; | |
920 | ||
921 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
922 | saddr.sa_family = old_active->dev->type; | |
923 | ||
924 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
925 | if (rv) | |
a4aee5c8 | 926 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
927 | bond->dev->name, -rv, new_active->dev->name); |
928 | out: | |
929 | read_lock(&bond->lock); | |
930 | write_lock_bh(&bond->curr_slave_lock); | |
931 | break; | |
932 | default: | |
a4aee5c8 | 933 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
934 | bond->dev->name, bond->params.fail_over_mac); |
935 | break; | |
936 | } | |
937 | ||
938 | } | |
939 | ||
a549952a JP |
940 | static bool bond_should_change_active(struct bonding *bond) |
941 | { | |
942 | struct slave *prim = bond->primary_slave; | |
943 | struct slave *curr = bond->curr_active_slave; | |
944 | ||
945 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
946 | return true; | |
947 | if (bond->force_primary) { | |
948 | bond->force_primary = false; | |
949 | return true; | |
950 | } | |
951 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
952 | (prim->speed < curr->speed || | |
953 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
954 | return false; | |
955 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
956 | return false; | |
957 | return true; | |
958 | } | |
3915c1e8 | 959 | |
1da177e4 LT |
960 | /** |
961 | * find_best_interface - select the best available slave to be the active one | |
962 | * @bond: our bonding struct | |
963 | * | |
964 | * Warning: Caller must hold curr_slave_lock for writing. | |
965 | */ | |
966 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
967 | { | |
968 | struct slave *new_active, *old_active; | |
969 | struct slave *bestslave = NULL; | |
970 | int mintime = bond->params.updelay; | |
971 | int i; | |
972 | ||
49b4ad92 | 973 | new_active = bond->curr_active_slave; |
1da177e4 LT |
974 | |
975 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 976 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 977 | new_active = bond->first_slave; |
3d632c3f | 978 | else |
1da177e4 | 979 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
980 | } |
981 | ||
1da177e4 | 982 | if ((bond->primary_slave) && |
a549952a JP |
983 | bond->primary_slave->link == BOND_LINK_UP && |
984 | bond_should_change_active(bond)) { | |
1da177e4 LT |
985 | new_active = bond->primary_slave; |
986 | } | |
987 | ||
988 | /* remember where to stop iterating over the slaves */ | |
989 | old_active = new_active; | |
990 | ||
991 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
992 | if (new_active->link == BOND_LINK_UP) { |
993 | return new_active; | |
994 | } else if (new_active->link == BOND_LINK_BACK && | |
995 | IS_UP(new_active->dev)) { | |
996 | /* link up, but waiting for stabilization */ | |
997 | if (new_active->delay < mintime) { | |
998 | mintime = new_active->delay; | |
999 | bestslave = new_active; | |
1da177e4 LT |
1000 | } |
1001 | } | |
1002 | } | |
1003 | ||
1004 | return bestslave; | |
1005 | } | |
1006 | ||
ad246c99 BH |
1007 | static bool bond_should_notify_peers(struct bonding *bond) |
1008 | { | |
1009 | struct slave *slave = bond->curr_active_slave; | |
1010 | ||
1011 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1012 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1013 | ||
1014 | if (!slave || !bond->send_peer_notif || | |
1015 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1016 | return false; | |
1017 | ||
1018 | bond->send_peer_notif--; | |
1019 | return true; | |
1020 | } | |
1021 | ||
1da177e4 LT |
1022 | /** |
1023 | * change_active_interface - change the active slave into the specified one | |
1024 | * @bond: our bonding struct | |
1025 | * @new: the new slave to make the active one | |
1026 | * | |
1027 | * Set the new slave to the bond's settings and unset them on the old | |
1028 | * curr_active_slave. | |
1029 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1030 | * | |
1031 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1032 | * because it is apparently the best available slave we have, even though its | |
1033 | * updelay hasn't timed out yet. | |
1034 | * | |
3915c1e8 JV |
1035 | * If new_active is not NULL, caller must hold bond->lock for read and |
1036 | * curr_slave_lock for write_bh. | |
1da177e4 | 1037 | */ |
a77b5325 | 1038 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1039 | { |
1040 | struct slave *old_active = bond->curr_active_slave; | |
1041 | ||
3d632c3f | 1042 | if (old_active == new_active) |
1da177e4 | 1043 | return; |
1da177e4 LT |
1044 | |
1045 | if (new_active) { | |
b2220cad JV |
1046 | new_active->jiffies = jiffies; |
1047 | ||
1da177e4 LT |
1048 | if (new_active->link == BOND_LINK_BACK) { |
1049 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1050 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1051 | bond->dev->name, new_active->dev->name, | |
1052 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1053 | } |
1054 | ||
1055 | new_active->delay = 0; | |
1056 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1057 | |
3d632c3f | 1058 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1059 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1060 | |
58402054 | 1061 | if (bond_is_lb(bond)) |
1da177e4 | 1062 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1063 | } else { |
1064 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1065 | pr_info("%s: making interface %s the new active one.\n", |
1066 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1067 | } |
1068 | } | |
1069 | } | |
1070 | ||
3d632c3f | 1071 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1072 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1073 | |
58402054 | 1074 | if (bond_is_lb(bond)) { |
1da177e4 | 1075 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1076 | if (old_active) |
1077 | bond_set_slave_inactive_flags(old_active); | |
1078 | if (new_active) | |
1079 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1080 | } else { |
1081 | bond->curr_active_slave = new_active; | |
1082 | } | |
c3ade5ca JV |
1083 | |
1084 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1085 | if (old_active) |
c3ade5ca | 1086 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1087 | |
1088 | if (new_active) { | |
ad246c99 BH |
1089 | bool should_notify_peers = false; |
1090 | ||
c3ade5ca | 1091 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1092 | |
709f8a45 OG |
1093 | if (bond->params.fail_over_mac) |
1094 | bond_do_fail_over_mac(bond, new_active, | |
1095 | old_active); | |
3915c1e8 | 1096 | |
ad246c99 BH |
1097 | if (netif_running(bond->dev)) { |
1098 | bond->send_peer_notif = | |
1099 | bond->params.num_peer_notif; | |
1100 | should_notify_peers = | |
1101 | bond_should_notify_peers(bond); | |
1102 | } | |
1103 | ||
01f3109d OG |
1104 | write_unlock_bh(&bond->curr_slave_lock); |
1105 | read_unlock(&bond->lock); | |
1106 | ||
75c78500 | 1107 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1108 | if (should_notify_peers) |
1109 | netdev_bonding_change(bond->dev, | |
1110 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1111 | |
1112 | read_lock(&bond->lock); | |
1113 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1114 | } |
c3ade5ca | 1115 | } |
a2fd940f | 1116 | |
5a37e8ca | 1117 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1118 | * all were sent on curr_active_slave. |
1119 | * resend only if bond is brought up with the affected | |
1120 | * bonding modes and the retransmission is enabled */ | |
1121 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1122 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1123 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1124 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1125 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1126 | } |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | /** | |
1130 | * bond_select_active_slave - select a new active slave, if needed | |
1131 | * @bond: our bonding struct | |
1132 | * | |
3d632c3f | 1133 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1134 | * - The old curr_active_slave has been released or lost its link. |
1135 | * - The primary_slave has got its link back. | |
1136 | * - A slave has got its link back and there's no old curr_active_slave. | |
1137 | * | |
3915c1e8 | 1138 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1139 | */ |
a77b5325 | 1140 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1141 | { |
1142 | struct slave *best_slave; | |
ff59c456 | 1143 | int rv; |
1da177e4 LT |
1144 | |
1145 | best_slave = bond_find_best_slave(bond); | |
1146 | if (best_slave != bond->curr_active_slave) { | |
1147 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1148 | rv = bond_set_carrier(bond); |
1149 | if (!rv) | |
1150 | return; | |
1151 | ||
1152 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1153 | pr_info("%s: first active interface up!\n", |
1154 | bond->dev->name); | |
ff59c456 | 1155 | } else { |
a4aee5c8 JP |
1156 | pr_info("%s: now running without any active interface !\n", |
1157 | bond->dev->name); | |
ff59c456 | 1158 | } |
1da177e4 LT |
1159 | } |
1160 | } | |
1161 | ||
1162 | /*--------------------------- slave list handling ---------------------------*/ | |
1163 | ||
1164 | /* | |
1165 | * This function attaches the slave to the end of list. | |
1166 | * | |
1167 | * bond->lock held for writing by caller. | |
1168 | */ | |
1169 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1170 | { | |
1171 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1172 | new_slave->next = new_slave; | |
1173 | new_slave->prev = new_slave; | |
1174 | bond->first_slave = new_slave; | |
1175 | } else { | |
1176 | new_slave->next = bond->first_slave; | |
1177 | new_slave->prev = bond->first_slave->prev; | |
1178 | new_slave->next->prev = new_slave; | |
1179 | new_slave->prev->next = new_slave; | |
1180 | } | |
1181 | ||
1182 | bond->slave_cnt++; | |
1183 | } | |
1184 | ||
1185 | /* | |
1186 | * This function detaches the slave from the list. | |
1187 | * WARNING: no check is made to verify if the slave effectively | |
1188 | * belongs to <bond>. | |
1189 | * Nothing is freed on return, structures are just unchained. | |
1190 | * If any slave pointer in bond was pointing to <slave>, | |
1191 | * it should be changed by the calling function. | |
1192 | * | |
1193 | * bond->lock held for writing by caller. | |
1194 | */ | |
1195 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1196 | { | |
3d632c3f | 1197 | if (slave->next) |
1da177e4 | 1198 | slave->next->prev = slave->prev; |
1da177e4 | 1199 | |
3d632c3f | 1200 | if (slave->prev) |
1da177e4 | 1201 | slave->prev->next = slave->next; |
1da177e4 LT |
1202 | |
1203 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1204 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1205 | bond->first_slave = slave->next; | |
1206 | } else { | |
1207 | bond->first_slave = NULL; /* slave was the last one */ | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | slave->next = NULL; | |
1212 | slave->prev = NULL; | |
1213 | bond->slave_cnt--; | |
1214 | } | |
1215 | ||
f6dc31a8 | 1216 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1217 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1218 | { |
8a8efa22 AW |
1219 | struct netpoll *np; |
1220 | int err = 0; | |
f6dc31a8 | 1221 | |
8a8efa22 AW |
1222 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1223 | err = -ENOMEM; | |
1224 | if (!np) | |
1225 | goto out; | |
1226 | ||
1227 | np->dev = slave->dev; | |
cefa9993 | 1228 | strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ); |
8a8efa22 AW |
1229 | err = __netpoll_setup(np); |
1230 | if (err) { | |
1231 | kfree(np); | |
1232 | goto out; | |
f6dc31a8 | 1233 | } |
8a8efa22 AW |
1234 | slave->np = np; |
1235 | out: | |
1236 | return err; | |
1237 | } | |
1238 | static inline void slave_disable_netpoll(struct slave *slave) | |
1239 | { | |
1240 | struct netpoll *np = slave->np; | |
1241 | ||
1242 | if (!np) | |
1243 | return; | |
1244 | ||
1245 | slave->np = NULL; | |
1246 | synchronize_rcu_bh(); | |
1247 | __netpoll_cleanup(np); | |
1248 | kfree(np); | |
1249 | } | |
1250 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1251 | { | |
1252 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1253 | return false; | |
1254 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1255 | return false; | |
1256 | return true; | |
f6dc31a8 WC |
1257 | } |
1258 | ||
1259 | static void bond_poll_controller(struct net_device *bond_dev) | |
1260 | { | |
8a8efa22 AW |
1261 | } |
1262 | ||
1263 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1264 | { | |
c2355e1a NH |
1265 | struct slave *slave; |
1266 | int i; | |
1267 | ||
8a8efa22 AW |
1268 | bond_for_each_slave(bond, slave, i) |
1269 | if (IS_UP(slave->dev)) | |
1270 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1271 | } |
f6dc31a8 WC |
1272 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1273 | { | |
1274 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1275 | |
1276 | read_lock(&bond->lock); | |
1277 | __bond_netpoll_cleanup(bond); | |
1278 | read_unlock(&bond->lock); | |
1279 | } | |
1280 | ||
1281 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1282 | { | |
1283 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1284 | struct slave *slave; |
8a8efa22 | 1285 | int i, err = 0; |
f6dc31a8 WC |
1286 | |
1287 | read_lock(&bond->lock); | |
f6dc31a8 | 1288 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1289 | err = slave_enable_netpoll(slave); |
1290 | if (err) { | |
1291 | __bond_netpoll_cleanup(bond); | |
1292 | break; | |
f6dc31a8 WC |
1293 | } |
1294 | } | |
1295 | read_unlock(&bond->lock); | |
8a8efa22 | 1296 | return err; |
f6dc31a8 WC |
1297 | } |
1298 | ||
8a8efa22 AW |
1299 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1300 | { | |
1301 | return bond->dev->npinfo; | |
1302 | } | |
f6dc31a8 | 1303 | |
8a8efa22 AW |
1304 | #else |
1305 | static inline int slave_enable_netpoll(struct slave *slave) | |
1306 | { | |
1307 | return 0; | |
1308 | } | |
1309 | static inline void slave_disable_netpoll(struct slave *slave) | |
1310 | { | |
1311 | } | |
f6dc31a8 WC |
1312 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1313 | { | |
1314 | } | |
f6dc31a8 WC |
1315 | #endif |
1316 | ||
1da177e4 LT |
1317 | /*---------------------------------- IOCTL ----------------------------------*/ |
1318 | ||
4ad072c9 AB |
1319 | static int bond_sethwaddr(struct net_device *bond_dev, |
1320 | struct net_device *slave_dev) | |
1da177e4 | 1321 | { |
5a03cdb7 HE |
1322 | pr_debug("bond_dev=%p\n", bond_dev); |
1323 | pr_debug("slave_dev=%p\n", slave_dev); | |
1324 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1325 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1326 | return 0; | |
1327 | } | |
1328 | ||
b2a103e6 | 1329 | static u32 bond_fix_features(struct net_device *dev, u32 features) |
8531c5ff | 1330 | { |
8531c5ff | 1331 | struct slave *slave; |
b2a103e6 MM |
1332 | struct bonding *bond = netdev_priv(dev); |
1333 | u32 mask; | |
8e3babcd | 1334 | int i; |
8531c5ff | 1335 | |
b2a103e6 | 1336 | read_lock(&bond->lock); |
b63365a2 | 1337 | |
b2a103e6 MM |
1338 | if (!bond->first_slave) { |
1339 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1340 | features |= NETIF_F_VLAN_CHALLENGED; | |
1341 | goto out; | |
1342 | } | |
b63365a2 | 1343 | |
b2a103e6 | 1344 | mask = features; |
b63365a2 | 1345 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1346 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1347 | |
54ef3137 | 1348 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1349 | features = netdev_increment_features(features, |
1350 | slave->dev->features, | |
b2a103e6 MM |
1351 | mask); |
1352 | } | |
1353 | ||
1354 | out: | |
1355 | read_unlock(&bond->lock); | |
1356 | return features; | |
1357 | } | |
1358 | ||
62f2a3a4 MM |
1359 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1360 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1361 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1362 | |
1363 | static void bond_compute_features(struct bonding *bond) | |
1364 | { | |
1365 | struct slave *slave; | |
1366 | struct net_device *bond_dev = bond->dev; | |
1367 | u32 vlan_features = BOND_VLAN_FEATURES; | |
1368 | unsigned short max_hard_header_len = ETH_HLEN; | |
1369 | int i; | |
1370 | ||
1371 | read_lock(&bond->lock); | |
1372 | ||
1373 | if (!bond->first_slave) | |
1374 | goto done; | |
1375 | ||
1376 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1377 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1378 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1379 | ||
54ef3137 JV |
1380 | if (slave->dev->hard_header_len > max_hard_header_len) |
1381 | max_hard_header_len = slave->dev->hard_header_len; | |
1382 | } | |
8531c5ff | 1383 | |
b63365a2 | 1384 | done: |
b2a103e6 | 1385 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1386 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff | 1387 | |
b2a103e6 MM |
1388 | read_unlock(&bond->lock); |
1389 | ||
1390 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1391 | } |
1392 | ||
872254dd MS |
1393 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1394 | struct net_device *slave_dev) | |
1395 | { | |
454d7c9b | 1396 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1397 | |
00829823 | 1398 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1399 | |
1400 | bond_dev->type = slave_dev->type; | |
1401 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1402 | bond_dev->addr_len = slave_dev->addr_len; | |
1403 | ||
1404 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1405 | slave_dev->addr_len); | |
d90a162a | 1406 | bond->setup_by_slave = 1; |
872254dd MS |
1407 | } |
1408 | ||
5b2c4dd2 | 1409 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1410 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1411 | */ |
1412 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1413 | struct slave *slave, |
1414 | struct bonding *bond) | |
5b2c4dd2 | 1415 | { |
2d7011ca | 1416 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1417 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1418 | skb->pkt_type != PACKET_BROADCAST && |
1419 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1420 | return false; |
5b2c4dd2 JP |
1421 | return true; |
1422 | } | |
1423 | return false; | |
1424 | } | |
1425 | ||
8a4eb573 | 1426 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1427 | { |
8a4eb573 | 1428 | struct sk_buff *skb = *pskb; |
f1c1775a | 1429 | struct slave *slave; |
0bd80dad | 1430 | struct bonding *bond; |
4d97480b MH |
1431 | void (*recv_probe)(struct sk_buff *, struct bonding *, |
1432 | struct slave *); | |
5b2c4dd2 | 1433 | |
8a4eb573 JP |
1434 | skb = skb_share_check(skb, GFP_ATOMIC); |
1435 | if (unlikely(!skb)) | |
1436 | return RX_HANDLER_CONSUMED; | |
1437 | ||
1438 | *pskb = skb; | |
5b2c4dd2 | 1439 | |
35d48903 JP |
1440 | slave = bond_slave_get_rcu(skb->dev); |
1441 | bond = slave->bond; | |
0bd80dad JP |
1442 | |
1443 | if (bond->params.arp_interval) | |
f1c1775a | 1444 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1445 | |
4d97480b MH |
1446 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1447 | if (recv_probe) { | |
3aba891d JP |
1448 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); |
1449 | ||
1450 | if (likely(nskb)) { | |
4d97480b | 1451 | recv_probe(nskb, bond, slave); |
3aba891d JP |
1452 | dev_kfree_skb(nskb); |
1453 | } | |
1454 | } | |
1455 | ||
0bd80dad | 1456 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1457 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1458 | } |
1459 | ||
35d48903 | 1460 | skb->dev = bond->dev; |
5b2c4dd2 | 1461 | |
0bd80dad | 1462 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1463 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1464 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1465 | |
541ac7c9 CG |
1466 | if (unlikely(skb_cow_head(skb, |
1467 | skb->data - skb_mac_header(skb)))) { | |
1468 | kfree_skb(skb); | |
8a4eb573 | 1469 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1470 | } |
35d48903 | 1471 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1472 | } |
1473 | ||
8a4eb573 | 1474 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1475 | } |
1476 | ||
1da177e4 | 1477 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1478 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1479 | { |
454d7c9b | 1480 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1481 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1482 | struct slave *new_slave = NULL; |
22bedad3 | 1483 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1484 | struct sockaddr addr; |
1485 | int link_reporting; | |
1da177e4 LT |
1486 | int res = 0; |
1487 | ||
552709d5 | 1488 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1489 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1490 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1491 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1492 | } |
1493 | ||
1da177e4 LT |
1494 | /* already enslaved */ |
1495 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1496 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1497 | return -EBUSY; |
1498 | } | |
1499 | ||
1500 | /* vlan challenged mutual exclusion */ | |
1501 | /* no need to lock since we're protected by rtnl_lock */ | |
1502 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1503 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
cc0e4070 | 1504 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
1505 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1506 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1507 | return -EPERM; |
1508 | } else { | |
a4aee5c8 JP |
1509 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1510 | bond_dev->name, slave_dev->name, | |
1511 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1512 | } |
1513 | } else { | |
5a03cdb7 | 1514 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1515 | } |
1516 | ||
217df670 JV |
1517 | /* |
1518 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1519 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1520 | * the current ifenslave will set the interface down prior to |
1521 | * enslaving it; the old ifenslave will not. | |
1522 | */ | |
1523 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1524 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1525 | slave_dev->name); |
1526 | res = -EPERM; | |
1527 | goto err_undo_flags; | |
1528 | } | |
1da177e4 | 1529 | |
872254dd MS |
1530 | /* set bonding device ether type by slave - bonding netdevices are |
1531 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1532 | * there is a need to override some of the type dependent attribs/funcs. | |
1533 | * | |
1534 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1535 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1536 | */ | |
1537 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1538 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1539 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1540 | bond_dev->name, |
1541 | bond_dev->type, slave_dev->type); | |
75c78500 | 1542 | |
3ca5b404 JP |
1543 | res = netdev_bonding_change(bond_dev, |
1544 | NETDEV_PRE_TYPE_CHANGE); | |
1545 | res = notifier_to_errno(res); | |
1546 | if (res) { | |
1547 | pr_err("%s: refused to change device type\n", | |
1548 | bond_dev->name); | |
1549 | res = -EBUSY; | |
1550 | goto err_undo_flags; | |
1551 | } | |
75c78500 | 1552 | |
32a806c1 | 1553 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1554 | dev_uc_flush(bond_dev); |
22bedad3 | 1555 | dev_mc_flush(bond_dev); |
32a806c1 | 1556 | |
e36b9d16 MS |
1557 | if (slave_dev->type != ARPHRD_ETHER) |
1558 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1559 | else { |
e36b9d16 | 1560 | ether_setup(bond_dev); |
550fd08c NH |
1561 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1562 | } | |
75c78500 | 1563 | |
93d9b7d7 JP |
1564 | netdev_bonding_change(bond_dev, |
1565 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1566 | } |
872254dd | 1567 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1568 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1569 | slave_dev->name, | |
1570 | slave_dev->type, bond_dev->type); | |
1571 | res = -EINVAL; | |
1572 | goto err_undo_flags; | |
872254dd MS |
1573 | } |
1574 | ||
eb7cc59a | 1575 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1576 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1577 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1578 | bond_dev->name); | |
3915c1e8 JV |
1579 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1580 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1581 | 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", |
1582 | bond_dev->name); | |
2ab82852 MS |
1583 | res = -EOPNOTSUPP; |
1584 | goto err_undo_flags; | |
1585 | } | |
1da177e4 LT |
1586 | } |
1587 | ||
8d8fc29d AW |
1588 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1589 | ||
c20811a7 JP |
1590 | /* If this is the first slave, then we need to set the master's hardware |
1591 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1592 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1593 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1594 | slave_dev->addr_len); | |
1595 | ||
1596 | ||
243cb4e5 | 1597 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1598 | if (!new_slave) { |
1599 | res = -ENOMEM; | |
1600 | goto err_undo_flags; | |
1601 | } | |
1602 | ||
bb1d9123 AG |
1603 | /* |
1604 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1605 | * is set via sysfs or module option if desired. | |
1606 | */ | |
1607 | new_slave->queue_id = 0; | |
1608 | ||
b15ba0fb JP |
1609 | /* Save slave's original mtu and then set it to match the bond */ |
1610 | new_slave->original_mtu = slave_dev->mtu; | |
1611 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1612 | if (res) { | |
1613 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1614 | goto err_free; | |
1615 | } | |
1616 | ||
217df670 JV |
1617 | /* |
1618 | * Save slave's original ("permanent") mac address for modes | |
1619 | * that need it, and for restoring it upon release, and then | |
1620 | * set it to the master's address | |
1621 | */ | |
1622 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1623 | |
dd957c57 | 1624 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1625 | /* |
1626 | * Set slave to master's mac address. The application already | |
1627 | * set the master's mac address to that of the first slave | |
1628 | */ | |
1629 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1630 | addr.sa_family = slave_dev->type; | |
1631 | res = dev_set_mac_address(slave_dev, &addr); | |
1632 | if (res) { | |
5a03cdb7 | 1633 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1634 | goto err_restore_mtu; |
2ab82852 | 1635 | } |
217df670 | 1636 | } |
1da177e4 | 1637 | |
1765a575 | 1638 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1639 | if (res) { |
1765a575 | 1640 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1641 | goto err_restore_mac; |
c2edacf8 | 1642 | } |
5b2c4dd2 | 1643 | |
217df670 JV |
1644 | /* open the slave since the application closed it */ |
1645 | res = dev_open(slave_dev); | |
1646 | if (res) { | |
3d632c3f | 1647 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1648 | goto err_unset_master; |
1da177e4 LT |
1649 | } |
1650 | ||
35d48903 | 1651 | new_slave->bond = bond; |
1da177e4 | 1652 | new_slave->dev = slave_dev; |
0b680e75 | 1653 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1654 | |
58402054 | 1655 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1656 | /* bond_alb_init_slave() must be called before all other stages since |
1657 | * it might fail and we do not want to have to undo everything | |
1658 | */ | |
1659 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1660 | if (res) |
569f0c4d | 1661 | goto err_close; |
1da177e4 LT |
1662 | } |
1663 | ||
1664 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1665 | * master's promisc (and mc) settings only if it becomes the | |
1666 | * curr_active_slave, and that is taken care of later when calling | |
1667 | * bond_change_active() | |
1668 | */ | |
1669 | if (!USES_PRIMARY(bond->params.mode)) { | |
1670 | /* set promiscuity level to new slave */ | |
1671 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1672 | res = dev_set_promiscuity(slave_dev, 1); |
1673 | if (res) | |
1674 | goto err_close; | |
1da177e4 LT |
1675 | } |
1676 | ||
1677 | /* set allmulti level to new slave */ | |
1678 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1679 | res = dev_set_allmulti(slave_dev, 1); |
1680 | if (res) | |
1681 | goto err_close; | |
1da177e4 LT |
1682 | } |
1683 | ||
b9e40857 | 1684 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1685 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1686 | netdev_for_each_mc_addr(ha, bond_dev) |
1687 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1688 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1689 | } |
1690 | ||
1691 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1692 | /* add lacpdu mc addr to mc list */ | |
1693 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1694 | ||
22bedad3 | 1695 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | bond_add_vlans_on_slave(bond, slave_dev); | |
1699 | ||
1700 | write_lock_bh(&bond->lock); | |
1701 | ||
1702 | bond_attach_slave(bond, new_slave); | |
1703 | ||
1704 | new_slave->delay = 0; | |
1705 | new_slave->link_failure_count = 0; | |
1706 | ||
3915c1e8 JV |
1707 | write_unlock_bh(&bond->lock); |
1708 | ||
b2a103e6 MM |
1709 | bond_compute_features(bond); |
1710 | ||
3915c1e8 JV |
1711 | read_lock(&bond->lock); |
1712 | ||
f5b2b966 JV |
1713 | new_slave->last_arp_rx = jiffies; |
1714 | ||
1da177e4 LT |
1715 | if (bond->params.miimon && !bond->params.use_carrier) { |
1716 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1717 | ||
1718 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1719 | /* | |
1720 | * miimon is set but a bonded network driver | |
1721 | * does not support ETHTOOL/MII and | |
1722 | * arp_interval is not set. Note: if | |
1723 | * use_carrier is enabled, we will never go | |
1724 | * here (because netif_carrier is always | |
1725 | * supported); thus, we don't need to change | |
1726 | * the messages for netif_carrier. | |
1727 | */ | |
a4aee5c8 | 1728 | pr_warning("%s: Warning: MII and ETHTOOL support not available for interface %s, and arp_interval/arp_ip_target module parameters not specified, thus bonding will not detect link failures! see bonding.txt for details.\n", |
4e0952c7 | 1729 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1730 | } else if (link_reporting == -1) { |
1731 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1732 | 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", |
1733 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1734 | } |
1735 | } | |
1736 | ||
1737 | /* check for initial state */ | |
1738 | if (!bond->params.miimon || | |
1739 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1740 | if (bond->params.updelay) { | |
a4aee5c8 | 1741 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1742 | new_slave->link = BOND_LINK_BACK; |
1743 | new_slave->delay = bond->params.updelay; | |
1744 | } else { | |
a4aee5c8 | 1745 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1746 | new_slave->link = BOND_LINK_UP; |
1747 | } | |
1748 | new_slave->jiffies = jiffies; | |
1749 | } else { | |
a4aee5c8 | 1750 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1751 | new_slave->link = BOND_LINK_DOWN; |
1752 | } | |
1753 | ||
1754 | if (bond_update_speed_duplex(new_slave) && | |
1755 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1756 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1757 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1758 | |
1759 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1760 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1761 | bond_dev->name); | |
1da177e4 LT |
1762 | } |
1763 | } | |
1764 | ||
1765 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1766 | /* if there is a primary slave, remember it */ | |
a549952a | 1767 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1768 | bond->primary_slave = new_slave; |
a549952a JP |
1769 | bond->force_primary = true; |
1770 | } | |
1da177e4 LT |
1771 | } |
1772 | ||
3915c1e8 JV |
1773 | write_lock_bh(&bond->curr_slave_lock); |
1774 | ||
1da177e4 LT |
1775 | switch (bond->params.mode) { |
1776 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1777 | bond_set_slave_inactive_flags(new_slave); |
1778 | bond_select_active_slave(bond); | |
1da177e4 LT |
1779 | break; |
1780 | case BOND_MODE_8023AD: | |
1781 | /* in 802.3ad mode, the internal mechanism | |
1782 | * will activate the slaves in the selected | |
1783 | * aggregator | |
1784 | */ | |
1785 | bond_set_slave_inactive_flags(new_slave); | |
1786 | /* if this is the first slave */ | |
1787 | if (bond->slave_cnt == 1) { | |
1788 | SLAVE_AD_INFO(new_slave).id = 1; | |
1789 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1790 | * can be called only after the mac address of the bond is set | |
1791 | */ | |
56d00c67 | 1792 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1793 | } else { |
1794 | SLAVE_AD_INFO(new_slave).id = | |
1795 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1796 | } | |
1797 | ||
1798 | bond_3ad_bind_slave(new_slave); | |
1799 | break; | |
1800 | case BOND_MODE_TLB: | |
1801 | case BOND_MODE_ALB: | |
e30bc066 | 1802 | bond_set_active_slave(new_slave); |
059fe7a5 | 1803 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1804 | bond_select_active_slave(bond); |
1da177e4 LT |
1805 | break; |
1806 | default: | |
5a03cdb7 | 1807 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1808 | |
1809 | /* always active in trunk mode */ | |
e30bc066 | 1810 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1811 | |
1812 | /* In trunking mode there is little meaning to curr_active_slave | |
1813 | * anyway (it holds no special properties of the bond device), | |
1814 | * so we can change it without calling change_active_interface() | |
1815 | */ | |
3d632c3f | 1816 | if (!bond->curr_active_slave) |
1da177e4 | 1817 | bond->curr_active_slave = new_slave; |
3d632c3f | 1818 | |
1da177e4 LT |
1819 | break; |
1820 | } /* switch(bond_mode) */ | |
1821 | ||
3915c1e8 JV |
1822 | write_unlock_bh(&bond->curr_slave_lock); |
1823 | ||
ff59c456 JV |
1824 | bond_set_carrier(bond); |
1825 | ||
f6dc31a8 | 1826 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1827 | slave_dev->npinfo = bond_netpoll_info(bond); |
1828 | if (slave_dev->npinfo) { | |
1829 | if (slave_enable_netpoll(new_slave)) { | |
1830 | read_unlock(&bond->lock); | |
1831 | pr_info("Error, %s: master_dev is using netpoll, " | |
1832 | "but new slave device does not support netpoll.\n", | |
1833 | bond_dev->name); | |
1834 | res = -EBUSY; | |
1835 | goto err_close; | |
1836 | } | |
f6dc31a8 WC |
1837 | } |
1838 | #endif | |
8a8efa22 | 1839 | |
3915c1e8 | 1840 | read_unlock(&bond->lock); |
1da177e4 | 1841 | |
b76cdba9 MW |
1842 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1843 | if (res) | |
569f0c4d | 1844 | goto err_close; |
b76cdba9 | 1845 | |
35d48903 JP |
1846 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1847 | new_slave); | |
1848 | if (res) { | |
1849 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1850 | goto err_dest_symlinks; | |
1851 | } | |
1852 | ||
a4aee5c8 JP |
1853 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1854 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1855 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1856 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1857 | |
1858 | /* enslave is successful */ | |
1859 | return 0; | |
1860 | ||
1861 | /* Undo stages on error */ | |
35d48903 JP |
1862 | err_dest_symlinks: |
1863 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1864 | ||
1da177e4 LT |
1865 | err_close: |
1866 | dev_close(slave_dev); | |
1867 | ||
569f0c4d | 1868 | err_unset_master: |
1765a575 | 1869 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1870 | |
1da177e4 | 1871 | err_restore_mac: |
dd957c57 | 1872 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1873 | /* XXX TODO - fom follow mode needs to change master's |
1874 | * MAC if this slave's MAC is in use by the bond, or at | |
1875 | * least print a warning. | |
1876 | */ | |
2ab82852 MS |
1877 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1878 | addr.sa_family = slave_dev->type; | |
1879 | dev_set_mac_address(slave_dev, &addr); | |
1880 | } | |
1da177e4 | 1881 | |
b15ba0fb JP |
1882 | err_restore_mtu: |
1883 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1884 | ||
1da177e4 LT |
1885 | err_free: |
1886 | kfree(new_slave); | |
1887 | ||
1888 | err_undo_flags: | |
b2a103e6 | 1889 | bond_compute_features(bond); |
3d632c3f | 1890 | |
1da177e4 LT |
1891 | return res; |
1892 | } | |
1893 | ||
1894 | /* | |
1895 | * Try to release the slave device <slave> from the bond device <master> | |
1896 | * It is legal to access curr_active_slave without a lock because all the function | |
1897 | * is write-locked. | |
1898 | * | |
1899 | * The rules for slave state should be: | |
1900 | * for Active/Backup: | |
1901 | * Active stays on all backups go down | |
1902 | * for Bonded connections: | |
1903 | * The first up interface should be left on and all others downed. | |
1904 | */ | |
a77b5325 | 1905 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1906 | { |
454d7c9b | 1907 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1908 | struct slave *slave, *oldcurrent; |
1909 | struct sockaddr addr; | |
b2a103e6 | 1910 | u32 old_features = bond_dev->features; |
1da177e4 LT |
1911 | |
1912 | /* slave is not a slave or master is not master of this slave */ | |
1913 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1914 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1915 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1916 | bond_dev->name, slave_dev->name); |
1917 | return -EINVAL; | |
1918 | } | |
1919 | ||
e843fa50 | 1920 | block_netpoll_tx(); |
daf9209b | 1921 | netdev_bonding_change(bond_dev, NETDEV_RELEASE); |
1da177e4 LT |
1922 | write_lock_bh(&bond->lock); |
1923 | ||
1924 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1925 | if (!slave) { | |
1926 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1927 | pr_info("%s: %s not enslaved\n", |
1928 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1929 | write_unlock_bh(&bond->lock); |
e843fa50 | 1930 | unblock_netpoll_tx(); |
1da177e4 LT |
1931 | return -EINVAL; |
1932 | } | |
1933 | ||
35d48903 JP |
1934 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1935 | * for this slave anymore. | |
1936 | */ | |
1937 | netdev_rx_handler_unregister(slave_dev); | |
1938 | write_unlock_bh(&bond->lock); | |
1939 | synchronize_net(); | |
1940 | write_lock_bh(&bond->lock); | |
1941 | ||
3915c1e8 | 1942 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1943 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1944 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1945 | 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", |
1946 | bond_dev->name, slave_dev->name, | |
1947 | slave->perm_hwaddr, | |
1948 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1949 | } |
1950 | ||
1951 | /* Inform AD package of unbinding of slave. */ | |
1952 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1953 | /* must be called before the slave is | |
1954 | * detached from the list | |
1955 | */ | |
1956 | bond_3ad_unbind_slave(slave); | |
1957 | } | |
1958 | ||
a4aee5c8 JP |
1959 | pr_info("%s: releasing %s interface %s\n", |
1960 | bond_dev->name, | |
e30bc066 | 1961 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 1962 | slave_dev->name); |
1da177e4 LT |
1963 | |
1964 | oldcurrent = bond->curr_active_slave; | |
1965 | ||
1966 | bond->current_arp_slave = NULL; | |
1967 | ||
1968 | /* release the slave from its bond */ | |
1969 | bond_detach_slave(bond, slave); | |
1970 | ||
3d632c3f | 1971 | if (bond->primary_slave == slave) |
1da177e4 | 1972 | bond->primary_slave = NULL; |
1da177e4 | 1973 | |
3d632c3f | 1974 | if (oldcurrent == slave) |
1da177e4 | 1975 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1976 | |
58402054 | 1977 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1978 | /* Must be called only after the slave has been |
1979 | * detached from the list and the curr_active_slave | |
1980 | * has been cleared (if our_slave == old_current), | |
1981 | * but before a new active slave is selected. | |
1982 | */ | |
2543331d | 1983 | write_unlock_bh(&bond->lock); |
1da177e4 | 1984 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1985 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1986 | } |
1987 | ||
059fe7a5 JV |
1988 | if (oldcurrent == slave) { |
1989 | /* | |
1990 | * Note that we hold RTNL over this sequence, so there | |
1991 | * is no concern that another slave add/remove event | |
1992 | * will interfere. | |
1993 | */ | |
1994 | write_unlock_bh(&bond->lock); | |
1995 | read_lock(&bond->lock); | |
1996 | write_lock_bh(&bond->curr_slave_lock); | |
1997 | ||
1da177e4 LT |
1998 | bond_select_active_slave(bond); |
1999 | ||
059fe7a5 JV |
2000 | write_unlock_bh(&bond->curr_slave_lock); |
2001 | read_unlock(&bond->lock); | |
2002 | write_lock_bh(&bond->lock); | |
2003 | } | |
2004 | ||
1da177e4 | 2005 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
2006 | bond_set_carrier(bond); |
2007 | ||
1da177e4 LT |
2008 | /* if the last slave was removed, zero the mac address |
2009 | * of the master so it will be set by the application | |
2010 | * to the mac address of the first slave | |
2011 | */ | |
2012 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2013 | ||
cc0e4070 | 2014 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2015 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2016 | bond_dev->name, bond_dev->name); | |
2017 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2018 | bond_dev->name); | |
1da177e4 | 2019 | } |
1da177e4 LT |
2020 | } |
2021 | ||
2022 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2023 | unblock_netpoll_tx(); |
1da177e4 | 2024 | |
b2a103e6 MM |
2025 | bond_compute_features(bond); |
2026 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2027 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2028 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2029 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2030 | ||
b76cdba9 MW |
2031 | /* must do this from outside any spinlocks */ |
2032 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2033 | ||
1da177e4 LT |
2034 | bond_del_vlans_from_slave(bond, slave_dev); |
2035 | ||
2036 | /* If the mode USES_PRIMARY, then we should only remove its | |
2037 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2038 | * already taken care of above when we detached the slave | |
2039 | */ | |
2040 | if (!USES_PRIMARY(bond->params.mode)) { | |
2041 | /* unset promiscuity level from slave */ | |
3d632c3f | 2042 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2043 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2044 | |
2045 | /* unset allmulti level from slave */ | |
3d632c3f | 2046 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2047 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2048 | |
2049 | /* flush master's mc_list from slave */ | |
b9e40857 | 2050 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2051 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2052 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2053 | } |
2054 | ||
1765a575 | 2055 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2056 | |
8a8efa22 | 2057 | slave_disable_netpoll(slave); |
f6dc31a8 | 2058 | |
1da177e4 LT |
2059 | /* close slave before restoring its mac address */ |
2060 | dev_close(slave_dev); | |
2061 | ||
3915c1e8 | 2062 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2063 | /* restore original ("permanent") mac address */ |
2064 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2065 | addr.sa_family = slave_dev->type; | |
2066 | dev_set_mac_address(slave_dev, &addr); | |
2067 | } | |
1da177e4 | 2068 | |
b15ba0fb JP |
2069 | dev_set_mtu(slave_dev, slave->original_mtu); |
2070 | ||
2d7011ca | 2071 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2072 | |
2073 | kfree(slave); | |
2074 | ||
2075 | return 0; /* deletion OK */ | |
2076 | } | |
2077 | ||
d90a162a | 2078 | /* |
dadaa10b | 2079 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2080 | * Must be under rtnl_lock when this function is called. |
2081 | */ | |
26d8ee75 | 2082 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2083 | struct net_device *slave_dev) | |
d90a162a | 2084 | { |
454d7c9b | 2085 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2086 | int ret; |
2087 | ||
2088 | ret = bond_release(bond_dev, slave_dev); | |
2089 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2090 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2091 | pr_info("%s: destroying bond %s.\n", |
2092 | bond_dev->name, bond_dev->name); | |
9e71626c | 2093 | unregister_netdevice(bond_dev); |
d90a162a MS |
2094 | } |
2095 | return ret; | |
2096 | } | |
2097 | ||
1da177e4 LT |
2098 | /* |
2099 | * This function releases all slaves. | |
2100 | */ | |
2101 | static int bond_release_all(struct net_device *bond_dev) | |
2102 | { | |
454d7c9b | 2103 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2104 | struct slave *slave; |
2105 | struct net_device *slave_dev; | |
2106 | struct sockaddr addr; | |
2107 | ||
2108 | write_lock_bh(&bond->lock); | |
2109 | ||
ff59c456 JV |
2110 | netif_carrier_off(bond_dev); |
2111 | ||
3d632c3f | 2112 | if (bond->slave_cnt == 0) |
1da177e4 | 2113 | goto out; |
1da177e4 LT |
2114 | |
2115 | bond->current_arp_slave = NULL; | |
2116 | bond->primary_slave = NULL; | |
2117 | bond_change_active_slave(bond, NULL); | |
2118 | ||
2119 | while ((slave = bond->first_slave) != NULL) { | |
2120 | /* Inform AD package of unbinding of slave | |
2121 | * before slave is detached from the list. | |
2122 | */ | |
3d632c3f | 2123 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2124 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2125 | |
2126 | slave_dev = slave->dev; | |
2127 | bond_detach_slave(bond, slave); | |
2128 | ||
2543331d JV |
2129 | /* now that the slave is detached, unlock and perform |
2130 | * all the undo steps that should not be called from | |
2131 | * within a lock. | |
2132 | */ | |
2133 | write_unlock_bh(&bond->lock); | |
2134 | ||
35d48903 JP |
2135 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2136 | * be called for this slave anymore. | |
2137 | */ | |
2138 | netdev_rx_handler_unregister(slave_dev); | |
2139 | synchronize_net(); | |
2140 | ||
58402054 | 2141 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2142 | /* must be called only after the slave |
2143 | * has been detached from the list | |
2144 | */ | |
2145 | bond_alb_deinit_slave(bond, slave); | |
2146 | } | |
2147 | ||
b76cdba9 | 2148 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2149 | bond_del_vlans_from_slave(bond, slave_dev); |
2150 | ||
2151 | /* If the mode USES_PRIMARY, then we should only remove its | |
2152 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2153 | * already taken care of above when we detached the slave | |
2154 | */ | |
2155 | if (!USES_PRIMARY(bond->params.mode)) { | |
2156 | /* unset promiscuity level from slave */ | |
3d632c3f | 2157 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2158 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2159 | |
2160 | /* unset allmulti level from slave */ | |
3d632c3f | 2161 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2162 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2163 | |
2164 | /* flush master's mc_list from slave */ | |
b9e40857 | 2165 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2166 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2167 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2168 | } |
2169 | ||
1765a575 | 2170 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2171 | |
8a8efa22 AW |
2172 | slave_disable_netpoll(slave); |
2173 | ||
1da177e4 LT |
2174 | /* close slave before restoring its mac address */ |
2175 | dev_close(slave_dev); | |
2176 | ||
dd957c57 | 2177 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2178 | /* restore original ("permanent") mac address*/ |
2179 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2180 | addr.sa_family = slave_dev->type; | |
2181 | dev_set_mac_address(slave_dev, &addr); | |
2182 | } | |
1da177e4 | 2183 | |
1da177e4 LT |
2184 | kfree(slave); |
2185 | ||
2186 | /* re-acquire the lock before getting the next slave */ | |
2187 | write_lock_bh(&bond->lock); | |
2188 | } | |
2189 | ||
2190 | /* zero the mac address of the master so it will be | |
2191 | * set by the application to the mac address of the | |
2192 | * first slave | |
2193 | */ | |
2194 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2195 | ||
cc0e4070 | 2196 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2197 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2198 | bond_dev->name, bond_dev->name); | |
2199 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2200 | bond_dev->name); | |
1da177e4 LT |
2201 | } |
2202 | ||
a4aee5c8 | 2203 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2204 | |
2205 | out: | |
2206 | write_unlock_bh(&bond->lock); | |
b2a103e6 MM |
2207 | |
2208 | bond_compute_features(bond); | |
2209 | ||
1da177e4 LT |
2210 | return 0; |
2211 | } | |
2212 | ||
2213 | /* | |
2214 | * This function changes the active slave to slave <slave_dev>. | |
2215 | * It returns -EINVAL in the following cases. | |
2216 | * - <slave_dev> is not found in the list. | |
2217 | * - There is not active slave now. | |
2218 | * - <slave_dev> is already active. | |
2219 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2220 | * - <slave_dev> is not running. | |
3d632c3f SH |
2221 | * In these cases, this function does nothing. |
2222 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2223 | */ |
2224 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2225 | { | |
454d7c9b | 2226 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2227 | struct slave *old_active = NULL; |
2228 | struct slave *new_active = NULL; | |
2229 | int res = 0; | |
2230 | ||
3d632c3f | 2231 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2232 | return -EINVAL; |
1da177e4 LT |
2233 | |
2234 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2235 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2236 | return -EINVAL; |
1da177e4 | 2237 | |
059fe7a5 | 2238 | read_lock(&bond->lock); |
1da177e4 | 2239 | |
059fe7a5 | 2240 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2241 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2242 | read_unlock(&bond->curr_slave_lock); |
2243 | ||
1da177e4 LT |
2244 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2245 | ||
2246 | /* | |
2247 | * Changing to the current active: do nothing; return success. | |
2248 | */ | |
2249 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2250 | read_unlock(&bond->lock); |
1da177e4 LT |
2251 | return 0; |
2252 | } | |
2253 | ||
2254 | if ((new_active) && | |
2255 | (old_active) && | |
2256 | (new_active->link == BOND_LINK_UP) && | |
2257 | IS_UP(new_active->dev)) { | |
e843fa50 | 2258 | block_netpoll_tx(); |
059fe7a5 | 2259 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2260 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2261 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2262 | unblock_netpoll_tx(); |
3d632c3f | 2263 | } else |
1da177e4 | 2264 | res = -EINVAL; |
1da177e4 | 2265 | |
059fe7a5 | 2266 | read_unlock(&bond->lock); |
1da177e4 LT |
2267 | |
2268 | return res; | |
2269 | } | |
2270 | ||
1da177e4 LT |
2271 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2272 | { | |
454d7c9b | 2273 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2274 | |
2275 | info->bond_mode = bond->params.mode; | |
2276 | info->miimon = bond->params.miimon; | |
2277 | ||
6603a6f2 | 2278 | read_lock(&bond->lock); |
1da177e4 | 2279 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2280 | read_unlock(&bond->lock); |
1da177e4 LT |
2281 | |
2282 | return 0; | |
2283 | } | |
2284 | ||
2285 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2286 | { | |
454d7c9b | 2287 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2288 | struct slave *slave; |
689c96cc | 2289 | int i, res = -ENODEV; |
1da177e4 | 2290 | |
6603a6f2 | 2291 | read_lock(&bond->lock); |
1da177e4 LT |
2292 | |
2293 | bond_for_each_slave(bond, slave, i) { | |
2294 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2295 | res = 0; |
2296 | strcpy(info->slave_name, slave->dev->name); | |
2297 | info->link = slave->link; | |
e30bc066 | 2298 | info->state = bond_slave_state(slave); |
689c96cc | 2299 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2300 | break; |
2301 | } | |
2302 | } | |
2303 | ||
6603a6f2 | 2304 | read_unlock(&bond->lock); |
1da177e4 | 2305 | |
689c96cc | 2306 | return res; |
1da177e4 LT |
2307 | } |
2308 | ||
2309 | /*-------------------------------- Monitoring -------------------------------*/ | |
2310 | ||
1da177e4 | 2311 | |
f0c76d61 JV |
2312 | static int bond_miimon_inspect(struct bonding *bond) |
2313 | { | |
2314 | struct slave *slave; | |
2315 | int i, link_state, commit = 0; | |
41f89100 JP |
2316 | bool ignore_updelay; |
2317 | ||
2318 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2319 | |
2320 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2321 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2322 | |
f0c76d61 | 2323 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2324 | |
2325 | switch (slave->link) { | |
f0c76d61 JV |
2326 | case BOND_LINK_UP: |
2327 | if (link_state) | |
2328 | continue; | |
1da177e4 | 2329 | |
f0c76d61 JV |
2330 | slave->link = BOND_LINK_FAIL; |
2331 | slave->delay = bond->params.downdelay; | |
2332 | if (slave->delay) { | |
a4aee5c8 JP |
2333 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2334 | bond->dev->name, | |
2335 | (bond->params.mode == | |
2336 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2337 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2338 | "active " : "backup ") : "", |
2339 | slave->dev->name, | |
2340 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2341 | } |
f0c76d61 JV |
2342 | /*FALLTHRU*/ |
2343 | case BOND_LINK_FAIL: | |
2344 | if (link_state) { | |
2345 | /* | |
2346 | * recovered before downdelay expired | |
2347 | */ | |
2348 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2349 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2350 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2351 | bond->dev->name, | |
2352 | (bond->params.downdelay - slave->delay) * | |
2353 | bond->params.miimon, | |
2354 | slave->dev->name); | |
f0c76d61 | 2355 | continue; |
1da177e4 | 2356 | } |
f0c76d61 JV |
2357 | |
2358 | if (slave->delay <= 0) { | |
2359 | slave->new_link = BOND_LINK_DOWN; | |
2360 | commit++; | |
2361 | continue; | |
1da177e4 | 2362 | } |
1da177e4 | 2363 | |
f0c76d61 JV |
2364 | slave->delay--; |
2365 | break; | |
2366 | ||
2367 | case BOND_LINK_DOWN: | |
2368 | if (!link_state) | |
2369 | continue; | |
2370 | ||
2371 | slave->link = BOND_LINK_BACK; | |
2372 | slave->delay = bond->params.updelay; | |
2373 | ||
2374 | if (slave->delay) { | |
a4aee5c8 JP |
2375 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2376 | bond->dev->name, slave->dev->name, | |
2377 | ignore_updelay ? 0 : | |
2378 | bond->params.updelay * | |
2379 | bond->params.miimon); | |
f0c76d61 JV |
2380 | } |
2381 | /*FALLTHRU*/ | |
2382 | case BOND_LINK_BACK: | |
2383 | if (!link_state) { | |
2384 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2385 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2386 | bond->dev->name, | |
2387 | (bond->params.updelay - slave->delay) * | |
2388 | bond->params.miimon, | |
2389 | slave->dev->name); | |
f0c76d61 JV |
2390 | |
2391 | continue; | |
2392 | } | |
2393 | ||
41f89100 JP |
2394 | if (ignore_updelay) |
2395 | slave->delay = 0; | |
2396 | ||
f0c76d61 JV |
2397 | if (slave->delay <= 0) { |
2398 | slave->new_link = BOND_LINK_UP; | |
2399 | commit++; | |
41f89100 | 2400 | ignore_updelay = false; |
f0c76d61 | 2401 | continue; |
1da177e4 | 2402 | } |
f0c76d61 JV |
2403 | |
2404 | slave->delay--; | |
1da177e4 | 2405 | break; |
f0c76d61 JV |
2406 | } |
2407 | } | |
1da177e4 | 2408 | |
f0c76d61 JV |
2409 | return commit; |
2410 | } | |
1da177e4 | 2411 | |
f0c76d61 JV |
2412 | static void bond_miimon_commit(struct bonding *bond) |
2413 | { | |
2414 | struct slave *slave; | |
2415 | int i; | |
2416 | ||
2417 | bond_for_each_slave(bond, slave, i) { | |
2418 | switch (slave->new_link) { | |
2419 | case BOND_LINK_NOCHANGE: | |
2420 | continue; | |
1da177e4 | 2421 | |
f0c76d61 JV |
2422 | case BOND_LINK_UP: |
2423 | slave->link = BOND_LINK_UP; | |
2424 | slave->jiffies = jiffies; | |
2425 | ||
2426 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2427 | /* prevent it from being the active one */ | |
e30bc066 | 2428 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2429 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2430 | /* make it immediately active */ | |
e30bc066 | 2431 | bond_set_active_slave(slave); |
f0c76d61 JV |
2432 | } else if (slave != bond->primary_slave) { |
2433 | /* prevent it from being the active one */ | |
e30bc066 | 2434 | bond_set_backup_slave(slave); |
1da177e4 | 2435 | } |
1da177e4 | 2436 | |
546add79 KPO |
2437 | bond_update_speed_duplex(slave); |
2438 | ||
5d30530e | 2439 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2440 | bond->dev->name, slave->dev->name, |
2441 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2442 | |
f0c76d61 JV |
2443 | /* notify ad that the link status has changed */ |
2444 | if (bond->params.mode == BOND_MODE_8023AD) | |
2445 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2446 | |
58402054 | 2447 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2448 | bond_alb_handle_link_change(bond, slave, |
2449 | BOND_LINK_UP); | |
1da177e4 | 2450 | |
f0c76d61 JV |
2451 | if (!bond->curr_active_slave || |
2452 | (slave == bond->primary_slave)) | |
2453 | goto do_failover; | |
1da177e4 | 2454 | |
f0c76d61 | 2455 | continue; |
059fe7a5 | 2456 | |
f0c76d61 | 2457 | case BOND_LINK_DOWN: |
fba4acda JV |
2458 | if (slave->link_failure_count < UINT_MAX) |
2459 | slave->link_failure_count++; | |
2460 | ||
f0c76d61 | 2461 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2462 | |
f0c76d61 JV |
2463 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2464 | bond->params.mode == BOND_MODE_8023AD) | |
2465 | bond_set_slave_inactive_flags(slave); | |
2466 | ||
a4aee5c8 JP |
2467 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2468 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2469 | |
2470 | if (bond->params.mode == BOND_MODE_8023AD) | |
2471 | bond_3ad_handle_link_change(slave, | |
2472 | BOND_LINK_DOWN); | |
2473 | ||
ae63e808 | 2474 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2475 | bond_alb_handle_link_change(bond, slave, |
2476 | BOND_LINK_DOWN); | |
2477 | ||
2478 | if (slave == bond->curr_active_slave) | |
2479 | goto do_failover; | |
2480 | ||
2481 | continue; | |
2482 | ||
2483 | default: | |
a4aee5c8 | 2484 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2485 | bond->dev->name, slave->new_link, |
2486 | slave->dev->name); | |
2487 | slave->new_link = BOND_LINK_NOCHANGE; | |
2488 | ||
2489 | continue; | |
2490 | } | |
2491 | ||
2492 | do_failover: | |
2493 | ASSERT_RTNL(); | |
e843fa50 | 2494 | block_netpoll_tx(); |
f0c76d61 JV |
2495 | write_lock_bh(&bond->curr_slave_lock); |
2496 | bond_select_active_slave(bond); | |
2497 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2498 | unblock_netpoll_tx(); |
f0c76d61 JV |
2499 | } |
2500 | ||
2501 | bond_set_carrier(bond); | |
1da177e4 LT |
2502 | } |
2503 | ||
0b0eef66 JV |
2504 | /* |
2505 | * bond_mii_monitor | |
2506 | * | |
2507 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2508 | * inspection, then (if inspection indicates something needs to be done) |
2509 | * an acquisition of appropriate locks followed by a commit phase to | |
2510 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2511 | */ |
2512 | void bond_mii_monitor(struct work_struct *work) | |
2513 | { | |
2514 | struct bonding *bond = container_of(work, struct bonding, | |
2515 | mii_work.work); | |
ad246c99 | 2516 | bool should_notify_peers = false; |
e6d265e8 | 2517 | unsigned long delay; |
0b0eef66 JV |
2518 | |
2519 | read_lock(&bond->lock); | |
e6d265e8 JV |
2520 | |
2521 | delay = msecs_to_jiffies(bond->params.miimon); | |
f0c76d61 JV |
2522 | |
2523 | if (bond->slave_cnt == 0) | |
2524 | goto re_arm; | |
b59f9f74 | 2525 | |
ad246c99 BH |
2526 | should_notify_peers = bond_should_notify_peers(bond); |
2527 | ||
f0c76d61 | 2528 | if (bond_miimon_inspect(bond)) { |
0b0eef66 | 2529 | read_unlock(&bond->lock); |
e6d265e8 JV |
2530 | |
2531 | /* Race avoidance with bond_close cancel of workqueue */ | |
2532 | if (!rtnl_trylock()) { | |
2533 | read_lock(&bond->lock); | |
2534 | delay = 1; | |
2535 | should_notify_peers = false; | |
2536 | goto re_arm; | |
2537 | } | |
2538 | ||
0b0eef66 | 2539 | read_lock(&bond->lock); |
f0c76d61 JV |
2540 | |
2541 | bond_miimon_commit(bond); | |
2542 | ||
5655662d JV |
2543 | read_unlock(&bond->lock); |
2544 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2545 | read_lock(&bond->lock); | |
0b0eef66 JV |
2546 | } |
2547 | ||
f0c76d61 | 2548 | re_arm: |
e6d265e8 JV |
2549 | if (bond->params.miimon) |
2550 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2551 | ||
0b0eef66 | 2552 | read_unlock(&bond->lock); |
ad246c99 BH |
2553 | |
2554 | if (should_notify_peers) { | |
e6d265e8 JV |
2555 | if (!rtnl_trylock()) { |
2556 | read_lock(&bond->lock); | |
2557 | bond->send_peer_notif++; | |
2558 | read_unlock(&bond->lock); | |
2559 | return; | |
2560 | } | |
ad246c99 BH |
2561 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
2562 | rtnl_unlock(); | |
2563 | } | |
0b0eef66 | 2564 | } |
c3ade5ca | 2565 | |
d3bb52b0 | 2566 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2567 | { |
2568 | struct in_device *idev; | |
2569 | struct in_ifaddr *ifa; | |
a144ea4b | 2570 | __be32 addr = 0; |
c3ade5ca JV |
2571 | |
2572 | if (!dev) | |
2573 | return 0; | |
2574 | ||
2575 | rcu_read_lock(); | |
e5ed6399 | 2576 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2577 | if (!idev) |
2578 | goto out; | |
2579 | ||
2580 | ifa = idev->ifa_list; | |
2581 | if (!ifa) | |
2582 | goto out; | |
2583 | ||
2584 | addr = ifa->ifa_local; | |
2585 | out: | |
2586 | rcu_read_unlock(); | |
2587 | return addr; | |
2588 | } | |
2589 | ||
d3bb52b0 | 2590 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2591 | { |
0883beca | 2592 | struct vlan_entry *vlan; |
f5b2b966 JV |
2593 | |
2594 | if (ip == bond->master_ip) | |
2595 | return 1; | |
2596 | ||
0883beca | 2597 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2598 | if (ip == vlan->vlan_ip) |
2599 | return 1; | |
2600 | } | |
2601 | ||
2602 | return 0; | |
2603 | } | |
2604 | ||
c3ade5ca JV |
2605 | /* |
2606 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2607 | * switches in VLAN mode (especially if ports are configured as | |
2608 | * "native" to a VLAN) might not pass non-tagged frames. | |
2609 | */ | |
d3bb52b0 | 2610 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id) |
c3ade5ca JV |
2611 | { |
2612 | struct sk_buff *skb; | |
2613 | ||
5a03cdb7 | 2614 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2615 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2616 | |
c3ade5ca JV |
2617 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2618 | NULL, slave_dev->dev_addr, NULL); | |
2619 | ||
2620 | if (!skb) { | |
a4aee5c8 | 2621 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2622 | return; |
2623 | } | |
2624 | if (vlan_id) { | |
2625 | skb = vlan_put_tag(skb, vlan_id); | |
2626 | if (!skb) { | |
a4aee5c8 | 2627 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2628 | return; |
2629 | } | |
2630 | } | |
2631 | arp_xmit(skb); | |
2632 | } | |
2633 | ||
2634 | ||
1da177e4 LT |
2635 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2636 | { | |
b23dd4fe | 2637 | int i, vlan_id; |
d3bb52b0 | 2638 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2639 | struct vlan_entry *vlan; |
c3ade5ca | 2640 | struct net_device *vlan_dev; |
c3ade5ca | 2641 | struct rtable *rt; |
1da177e4 | 2642 | |
6b780567 MW |
2643 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2644 | if (!targets[i]) | |
5a31bec0 | 2645 | break; |
5a03cdb7 | 2646 | pr_debug("basa: target %x\n", targets[i]); |
cc0e4070 | 2647 | if (!bond_vlan_used(bond)) { |
5a03cdb7 | 2648 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2649 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2650 | bond->master_ip, 0); | |
2651 | continue; | |
2652 | } | |
2653 | ||
2654 | /* | |
2655 | * If VLANs are configured, we do a route lookup to | |
2656 | * determine which VLAN interface would be used, so we | |
2657 | * can tag the ARP with the proper VLAN tag. | |
2658 | */ | |
78fbfd8a DM |
2659 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2660 | RTO_ONLINK, 0); | |
b23dd4fe | 2661 | if (IS_ERR(rt)) { |
c3ade5ca | 2662 | if (net_ratelimit()) { |
a4aee5c8 | 2663 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2664 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2665 | } |
2666 | continue; | |
2667 | } | |
2668 | ||
2669 | /* | |
2670 | * This target is not on a VLAN | |
2671 | */ | |
d8d1f30b | 2672 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2673 | ip_rt_put(rt); |
5a03cdb7 | 2674 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2675 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2676 | bond->master_ip, 0); | |
2677 | continue; | |
2678 | } | |
2679 | ||
2680 | vlan_id = 0; | |
0883beca | 2681 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
2682 | rcu_read_lock(); |
2683 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
2684 | vlan->vlan_id); | |
2685 | rcu_read_unlock(); | |
d8d1f30b | 2686 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2687 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2688 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2689 | vlan_dev->name, vlan_id); |
2690 | break; | |
2691 | } | |
2692 | } | |
2693 | ||
2694 | if (vlan_id) { | |
ed4b9f80 | 2695 | ip_rt_put(rt); |
c3ade5ca JV |
2696 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2697 | vlan->vlan_ip, vlan_id); | |
2698 | continue; | |
2699 | } | |
2700 | ||
2701 | if (net_ratelimit()) { | |
a4aee5c8 | 2702 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2703 | bond->dev->name, &targets[i], |
d8d1f30b | 2704 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2705 | } |
ed4b9f80 | 2706 | ip_rt_put(rt); |
c3ade5ca JV |
2707 | } |
2708 | } | |
2709 | ||
d3bb52b0 | 2710 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2711 | { |
2712 | int i; | |
d3bb52b0 | 2713 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2714 | |
f5b2b966 | 2715 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2716 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2717 | &sip, &tip, i, &targets[i], |
2718 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2719 | if (sip == targets[i]) { |
2720 | if (bond_has_this_ip(bond, tip)) | |
2721 | slave->last_arp_rx = jiffies; | |
2722 | return; | |
2723 | } | |
2724 | } | |
2725 | } | |
2726 | ||
3aba891d JP |
2727 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2728 | struct slave *slave) | |
f5b2b966 JV |
2729 | { |
2730 | struct arphdr *arp; | |
f5b2b966 | 2731 | unsigned char *arp_ptr; |
d3bb52b0 | 2732 | __be32 sip, tip; |
f5b2b966 | 2733 | |
3aba891d JP |
2734 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2735 | return; | |
f5b2b966 | 2736 | |
f5b2b966 JV |
2737 | read_lock(&bond->lock); |
2738 | ||
3aba891d JP |
2739 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2740 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2741 | |
3aba891d | 2742 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2743 | goto out_unlock; |
2744 | ||
d0a92be0 | 2745 | arp = arp_hdr(skb); |
3aba891d | 2746 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2747 | skb->pkt_type == PACKET_OTHERHOST || |
2748 | skb->pkt_type == PACKET_LOOPBACK || | |
2749 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2750 | arp->ar_pro != htons(ETH_P_IP) || | |
2751 | arp->ar_pln != 4) | |
2752 | goto out_unlock; | |
2753 | ||
2754 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2755 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2756 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2757 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2758 | memcpy(&tip, arp_ptr, 4); |
2759 | ||
5a03cdb7 | 2760 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2761 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2762 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2763 | &sip, &tip); | |
f5b2b966 JV |
2764 | |
2765 | /* | |
2766 | * Backup slaves won't see the ARP reply, but do come through | |
2767 | * here for each ARP probe (so we swap the sip/tip to validate | |
2768 | * the probe). In a "redundant switch, common router" type of | |
2769 | * configuration, the ARP probe will (hopefully) travel from | |
2770 | * the active, through one switch, the router, then the other | |
2771 | * switch before reaching the backup. | |
2772 | */ | |
e30bc066 | 2773 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2774 | bond_validate_arp(bond, slave, sip, tip); |
2775 | else | |
2776 | bond_validate_arp(bond, slave, tip, sip); | |
2777 | ||
2778 | out_unlock: | |
2779 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2780 | } |
2781 | ||
1da177e4 LT |
2782 | /* |
2783 | * this function is called regularly to monitor each slave's link | |
2784 | * ensuring that traffic is being sent and received when arp monitoring | |
2785 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2786 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2787 | * arp monitoring in active backup mode. | |
2788 | */ | |
1b76b316 | 2789 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2790 | { |
1b76b316 JV |
2791 | struct bonding *bond = container_of(work, struct bonding, |
2792 | arp_work.work); | |
1da177e4 LT |
2793 | struct slave *slave, *oldcurrent; |
2794 | int do_failover = 0; | |
2795 | int delta_in_ticks; | |
2796 | int i; | |
2797 | ||
2798 | read_lock(&bond->lock); | |
2799 | ||
5ce0da8f | 2800 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2801 | |
3d632c3f | 2802 | if (bond->slave_cnt == 0) |
1da177e4 | 2803 | goto re_arm; |
1da177e4 LT |
2804 | |
2805 | read_lock(&bond->curr_slave_lock); | |
2806 | oldcurrent = bond->curr_active_slave; | |
2807 | read_unlock(&bond->curr_slave_lock); | |
2808 | ||
2809 | /* see if any of the previous devices are up now (i.e. they have | |
2810 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2811 | * the picture unless it is null. also, slave->jiffies is not needed | |
2812 | * here because we send an arp on each slave and give a slave as | |
2813 | * long as it needs to get the tx/rx within the delta. | |
2814 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2815 | * so it can wait | |
2816 | */ | |
2817 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2818 | unsigned long trans_start = dev_trans_start(slave->dev); |
2819 | ||
1da177e4 | 2820 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2821 | if (time_in_range(jiffies, |
2822 | trans_start - delta_in_ticks, | |
2823 | trans_start + delta_in_ticks) && | |
2824 | time_in_range(jiffies, | |
2825 | slave->dev->last_rx - delta_in_ticks, | |
2826 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2827 | |
2828 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2829 | bond_set_active_slave(slave); |
1da177e4 LT |
2830 | |
2831 | /* primary_slave has no meaning in round-robin | |
2832 | * mode. the window of a slave being up and | |
2833 | * curr_active_slave being null after enslaving | |
2834 | * is closed. | |
2835 | */ | |
2836 | if (!oldcurrent) { | |
a4aee5c8 JP |
2837 | pr_info("%s: link status definitely up for interface %s, ", |
2838 | bond->dev->name, | |
2839 | slave->dev->name); | |
1da177e4 LT |
2840 | do_failover = 1; |
2841 | } else { | |
a4aee5c8 JP |
2842 | pr_info("%s: interface %s is now up\n", |
2843 | bond->dev->name, | |
2844 | slave->dev->name); | |
1da177e4 LT |
2845 | } |
2846 | } | |
2847 | } else { | |
2848 | /* slave->link == BOND_LINK_UP */ | |
2849 | ||
2850 | /* not all switches will respond to an arp request | |
2851 | * when the source ip is 0, so don't take the link down | |
2852 | * if we don't know our ip yet | |
2853 | */ | |
cb32f2a0 JB |
2854 | if (!time_in_range(jiffies, |
2855 | trans_start - delta_in_ticks, | |
2856 | trans_start + 2 * delta_in_ticks) || | |
2857 | !time_in_range(jiffies, | |
2858 | slave->dev->last_rx - delta_in_ticks, | |
2859 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2860 | |
2861 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2862 | bond_set_backup_slave(slave); |
1da177e4 | 2863 | |
3d632c3f | 2864 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2865 | slave->link_failure_count++; |
1da177e4 | 2866 | |
a4aee5c8 JP |
2867 | pr_info("%s: interface %s is now down.\n", |
2868 | bond->dev->name, | |
2869 | slave->dev->name); | |
1da177e4 | 2870 | |
3d632c3f | 2871 | if (slave == oldcurrent) |
1da177e4 | 2872 | do_failover = 1; |
1da177e4 LT |
2873 | } |
2874 | } | |
2875 | ||
2876 | /* note: if switch is in round-robin mode, all links | |
2877 | * must tx arp to ensure all links rx an arp - otherwise | |
2878 | * links may oscillate or not come up at all; if switch is | |
2879 | * in something like xor mode, there is nothing we can | |
2880 | * do - all replies will be rx'ed on same link causing slaves | |
2881 | * to be unstable during low/no traffic periods | |
2882 | */ | |
3d632c3f | 2883 | if (IS_UP(slave->dev)) |
1da177e4 | 2884 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2885 | } |
2886 | ||
2887 | if (do_failover) { | |
e843fa50 | 2888 | block_netpoll_tx(); |
059fe7a5 | 2889 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2890 | |
2891 | bond_select_active_slave(bond); | |
2892 | ||
059fe7a5 | 2893 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2894 | unblock_netpoll_tx(); |
1da177e4 LT |
2895 | } |
2896 | ||
2897 | re_arm: | |
e6d265e8 | 2898 | if (bond->params.arp_interval) |
1b76b316 | 2899 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 2900 | |
1da177e4 LT |
2901 | read_unlock(&bond->lock); |
2902 | } | |
2903 | ||
2904 | /* | |
b2220cad JV |
2905 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2906 | * changes. Sets new_link in slaves to specify what action should take | |
2907 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2908 | * to link states must be committed. | |
2909 | * | |
2910 | * Called with bond->lock held for read. | |
1da177e4 | 2911 | */ |
b2220cad | 2912 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2913 | { |
1da177e4 | 2914 | struct slave *slave; |
b2220cad | 2915 | int i, commit = 0; |
cb32f2a0 | 2916 | unsigned long trans_start; |
1da177e4 | 2917 | |
b2220cad JV |
2918 | bond_for_each_slave(bond, slave, i) { |
2919 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2920 | |
b2220cad | 2921 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2922 | if (time_in_range(jiffies, |
2923 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2924 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2925 | ||
b2220cad JV |
2926 | slave->new_link = BOND_LINK_UP; |
2927 | commit++; | |
2928 | } | |
1da177e4 | 2929 | |
b2220cad JV |
2930 | continue; |
2931 | } | |
1da177e4 | 2932 | |
b2220cad JV |
2933 | /* |
2934 | * Give slaves 2*delta after being enslaved or made | |
2935 | * active. This avoids bouncing, as the last receive | |
2936 | * times need a full ARP monitor cycle to be updated. | |
2937 | */ | |
cb32f2a0 JB |
2938 | if (time_in_range(jiffies, |
2939 | slave->jiffies - delta_in_ticks, | |
2940 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
2941 | continue; |
2942 | ||
2943 | /* | |
2944 | * Backup slave is down if: | |
2945 | * - No current_arp_slave AND | |
2946 | * - more than 3*delta since last receive AND | |
2947 | * - the bond has an IP address | |
2948 | * | |
2949 | * Note: a non-null current_arp_slave indicates | |
2950 | * the curr_active_slave went down and we are | |
2951 | * searching for a new one; under this condition | |
2952 | * we only take the curr_active_slave down - this | |
2953 | * gives each slave a chance to tx/rx traffic | |
2954 | * before being taken out | |
2955 | */ | |
e30bc066 | 2956 | if (!bond_is_active_slave(slave) && |
b2220cad | 2957 | !bond->current_arp_slave && |
cb32f2a0 JB |
2958 | !time_in_range(jiffies, |
2959 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2960 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
2961 | ||
b2220cad JV |
2962 | slave->new_link = BOND_LINK_DOWN; |
2963 | commit++; | |
2964 | } | |
2965 | ||
2966 | /* | |
2967 | * Active slave is down if: | |
2968 | * - more than 2*delta since transmitting OR | |
2969 | * - (more than 2*delta since receive AND | |
2970 | * the bond has an IP address) | |
2971 | */ | |
cb32f2a0 | 2972 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2973 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
2974 | (!time_in_range(jiffies, |
2975 | trans_start - delta_in_ticks, | |
2976 | trans_start + 2 * delta_in_ticks) || | |
2977 | !time_in_range(jiffies, | |
2978 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2979 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
2980 | ||
b2220cad JV |
2981 | slave->new_link = BOND_LINK_DOWN; |
2982 | commit++; | |
2983 | } | |
1da177e4 LT |
2984 | } |
2985 | ||
b2220cad JV |
2986 | return commit; |
2987 | } | |
1da177e4 | 2988 | |
b2220cad JV |
2989 | /* |
2990 | * Called to commit link state changes noted by inspection step of | |
2991 | * active-backup mode ARP monitor. | |
2992 | * | |
2993 | * Called with RTNL and bond->lock for read. | |
2994 | */ | |
2995 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2996 | { | |
2997 | struct slave *slave; | |
2998 | int i; | |
cb32f2a0 | 2999 | unsigned long trans_start; |
1da177e4 | 3000 | |
b2220cad JV |
3001 | bond_for_each_slave(bond, slave, i) { |
3002 | switch (slave->new_link) { | |
3003 | case BOND_LINK_NOCHANGE: | |
3004 | continue; | |
ff59c456 | 3005 | |
b2220cad | 3006 | case BOND_LINK_UP: |
cb32f2a0 | 3007 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 3008 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
3009 | time_in_range(jiffies, |
3010 | trans_start - delta_in_ticks, | |
3011 | trans_start + delta_in_ticks)) || | |
b9f60253 | 3012 | bond->curr_active_slave != slave) { |
b2220cad | 3013 | slave->link = BOND_LINK_UP; |
b2220cad JV |
3014 | bond->current_arp_slave = NULL; |
3015 | ||
a4aee5c8 | 3016 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3017 | bond->dev->name, slave->dev->name); |
b2220cad | 3018 | |
b9f60253 JP |
3019 | if (!bond->curr_active_slave || |
3020 | (slave == bond->primary_slave)) | |
3021 | goto do_failover; | |
1da177e4 | 3022 | |
b9f60253 | 3023 | } |
1da177e4 | 3024 | |
b9f60253 | 3025 | continue; |
1da177e4 | 3026 | |
b2220cad JV |
3027 | case BOND_LINK_DOWN: |
3028 | if (slave->link_failure_count < UINT_MAX) | |
3029 | slave->link_failure_count++; | |
3030 | ||
3031 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3032 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3033 | |
a4aee5c8 | 3034 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3035 | bond->dev->name, slave->dev->name); |
b2220cad | 3036 | |
b9f60253 | 3037 | if (slave == bond->curr_active_slave) { |
b2220cad | 3038 | bond->current_arp_slave = NULL; |
b9f60253 | 3039 | goto do_failover; |
1da177e4 | 3040 | } |
b9f60253 JP |
3041 | |
3042 | continue; | |
b2220cad JV |
3043 | |
3044 | default: | |
a4aee5c8 | 3045 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3046 | bond->dev->name, slave->new_link, |
3047 | slave->dev->name); | |
b9f60253 | 3048 | continue; |
1da177e4 | 3049 | } |
1da177e4 | 3050 | |
b9f60253 JP |
3051 | do_failover: |
3052 | ASSERT_RTNL(); | |
e843fa50 | 3053 | block_netpoll_tx(); |
b2220cad | 3054 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3055 | bond_select_active_slave(bond); |
b2220cad | 3056 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3057 | unblock_netpoll_tx(); |
b2220cad | 3058 | } |
1da177e4 | 3059 | |
b2220cad JV |
3060 | bond_set_carrier(bond); |
3061 | } | |
1da177e4 | 3062 | |
b2220cad JV |
3063 | /* |
3064 | * Send ARP probes for active-backup mode ARP monitor. | |
3065 | * | |
3066 | * Called with bond->lock held for read. | |
3067 | */ | |
3068 | static void bond_ab_arp_probe(struct bonding *bond) | |
3069 | { | |
3070 | struct slave *slave; | |
3071 | int i; | |
1da177e4 | 3072 | |
b2220cad | 3073 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3074 | |
b2220cad | 3075 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3076 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3077 | bond->current_arp_slave->dev->name, | |
3078 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3079 | |
b2220cad JV |
3080 | if (bond->curr_active_slave) { |
3081 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3082 | read_unlock(&bond->curr_slave_lock); | |
3083 | return; | |
3084 | } | |
1da177e4 | 3085 | |
b2220cad | 3086 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3087 | |
b2220cad JV |
3088 | /* if we don't have a curr_active_slave, search for the next available |
3089 | * backup slave from the current_arp_slave and make it the candidate | |
3090 | * for becoming the curr_active_slave | |
3091 | */ | |
1da177e4 | 3092 | |
b2220cad JV |
3093 | if (!bond->current_arp_slave) { |
3094 | bond->current_arp_slave = bond->first_slave; | |
3095 | if (!bond->current_arp_slave) | |
3096 | return; | |
3097 | } | |
1da177e4 | 3098 | |
b2220cad | 3099 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3100 | |
b2220cad JV |
3101 | /* search for next candidate */ |
3102 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3103 | if (IS_UP(slave->dev)) { | |
3104 | slave->link = BOND_LINK_BACK; | |
3105 | bond_set_slave_active_flags(slave); | |
3106 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3107 | slave->jiffies = jiffies; |
b2220cad JV |
3108 | bond->current_arp_slave = slave; |
3109 | break; | |
1da177e4 LT |
3110 | } |
3111 | ||
b2220cad JV |
3112 | /* if the link state is up at this point, we |
3113 | * mark it down - this can happen if we have | |
3114 | * simultaneous link failures and | |
3115 | * reselect_active_interface doesn't make this | |
3116 | * one the current slave so it is still marked | |
3117 | * up when it is actually down | |
1da177e4 | 3118 | */ |
b2220cad JV |
3119 | if (slave->link == BOND_LINK_UP) { |
3120 | slave->link = BOND_LINK_DOWN; | |
3121 | if (slave->link_failure_count < UINT_MAX) | |
3122 | slave->link_failure_count++; | |
1da177e4 | 3123 | |
b2220cad JV |
3124 | bond_set_slave_inactive_flags(slave); |
3125 | ||
a4aee5c8 JP |
3126 | pr_info("%s: backup interface %s is now down.\n", |
3127 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3128 | } |
b2220cad JV |
3129 | } |
3130 | } | |
1da177e4 | 3131 | |
b2220cad JV |
3132 | void bond_activebackup_arp_mon(struct work_struct *work) |
3133 | { | |
3134 | struct bonding *bond = container_of(work, struct bonding, | |
3135 | arp_work.work); | |
ad246c99 | 3136 | bool should_notify_peers = false; |
b2220cad | 3137 | int delta_in_ticks; |
1da177e4 | 3138 | |
b2220cad | 3139 | read_lock(&bond->lock); |
1da177e4 | 3140 | |
b2220cad | 3141 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3142 | |
b2220cad JV |
3143 | if (bond->slave_cnt == 0) |
3144 | goto re_arm; | |
3145 | ||
ad246c99 BH |
3146 | should_notify_peers = bond_should_notify_peers(bond); |
3147 | ||
b2220cad JV |
3148 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3149 | read_unlock(&bond->lock); | |
e6d265e8 JV |
3150 | |
3151 | /* Race avoidance with bond_close flush of workqueue */ | |
3152 | if (!rtnl_trylock()) { | |
3153 | read_lock(&bond->lock); | |
3154 | delta_in_ticks = 1; | |
3155 | should_notify_peers = false; | |
3156 | goto re_arm; | |
3157 | } | |
3158 | ||
b2220cad JV |
3159 | read_lock(&bond->lock); |
3160 | ||
3161 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3162 | ||
3163 | read_unlock(&bond->lock); | |
3164 | rtnl_unlock(); | |
3165 | read_lock(&bond->lock); | |
1da177e4 LT |
3166 | } |
3167 | ||
b2220cad JV |
3168 | bond_ab_arp_probe(bond); |
3169 | ||
1da177e4 | 3170 | re_arm: |
e6d265e8 | 3171 | if (bond->params.arp_interval) |
1b76b316 | 3172 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 3173 | |
1da177e4 | 3174 | read_unlock(&bond->lock); |
ad246c99 BH |
3175 | |
3176 | if (should_notify_peers) { | |
e6d265e8 JV |
3177 | if (!rtnl_trylock()) { |
3178 | read_lock(&bond->lock); | |
3179 | bond->send_peer_notif++; | |
3180 | read_unlock(&bond->lock); | |
3181 | return; | |
3182 | } | |
ad246c99 BH |
3183 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
3184 | rtnl_unlock(); | |
3185 | } | |
1da177e4 LT |
3186 | } |
3187 | ||
1da177e4 LT |
3188 | /*-------------------------- netdev event handling --------------------------*/ |
3189 | ||
3190 | /* | |
3191 | * Change device name | |
3192 | */ | |
3193 | static int bond_event_changename(struct bonding *bond) | |
3194 | { | |
1da177e4 LT |
3195 | bond_remove_proc_entry(bond); |
3196 | bond_create_proc_entry(bond); | |
7e083840 | 3197 | |
f073c7ca TI |
3198 | bond_debug_reregister(bond); |
3199 | ||
1da177e4 LT |
3200 | return NOTIFY_DONE; |
3201 | } | |
3202 | ||
3d632c3f SH |
3203 | static int bond_master_netdev_event(unsigned long event, |
3204 | struct net_device *bond_dev) | |
1da177e4 | 3205 | { |
454d7c9b | 3206 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3207 | |
3208 | switch (event) { | |
3209 | case NETDEV_CHANGENAME: | |
3210 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3211 | default: |
3212 | break; | |
3213 | } | |
3214 | ||
3215 | return NOTIFY_DONE; | |
3216 | } | |
3217 | ||
3d632c3f SH |
3218 | static int bond_slave_netdev_event(unsigned long event, |
3219 | struct net_device *slave_dev) | |
1da177e4 LT |
3220 | { |
3221 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3222 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3223 | |
3224 | switch (event) { | |
3225 | case NETDEV_UNREGISTER: | |
3226 | if (bond_dev) { | |
1284cd3a JV |
3227 | if (bond->setup_by_slave) |
3228 | bond_release_and_destroy(bond_dev, slave_dev); | |
3229 | else | |
3230 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3231 | } |
3232 | break; | |
3233 | case NETDEV_CHANGE: | |
17d04500 JV |
3234 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3235 | struct slave *slave; | |
3236 | ||
3237 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3238 | if (slave) { | |
5d30530e | 3239 | u32 old_speed = slave->speed; |
65cce19c | 3240 | u8 old_duplex = slave->duplex; |
17d04500 JV |
3241 | |
3242 | bond_update_speed_duplex(slave); | |
3243 | ||
3244 | if (bond_is_lb(bond)) | |
3245 | break; | |
3246 | ||
3247 | if (old_speed != slave->speed) | |
3248 | bond_3ad_adapter_speed_changed(slave); | |
3249 | if (old_duplex != slave->duplex) | |
3250 | bond_3ad_adapter_duplex_changed(slave); | |
3251 | } | |
3252 | } | |
3253 | ||
1da177e4 LT |
3254 | break; |
3255 | case NETDEV_DOWN: | |
3256 | /* | |
3257 | * ... Or is it this? | |
3258 | */ | |
3259 | break; | |
3260 | case NETDEV_CHANGEMTU: | |
3261 | /* | |
3262 | * TODO: Should slaves be allowed to | |
3263 | * independently alter their MTU? For | |
3264 | * an active-backup bond, slaves need | |
3265 | * not be the same type of device, so | |
3266 | * MTUs may vary. For other modes, | |
3267 | * slaves arguably should have the | |
3268 | * same MTUs. To do this, we'd need to | |
3269 | * take over the slave's change_mtu | |
3270 | * function for the duration of their | |
3271 | * servitude. | |
3272 | */ | |
3273 | break; | |
3274 | case NETDEV_CHANGENAME: | |
3275 | /* | |
3276 | * TODO: handle changing the primary's name | |
3277 | */ | |
3278 | break; | |
8531c5ff AK |
3279 | case NETDEV_FEAT_CHANGE: |
3280 | bond_compute_features(bond); | |
3281 | break; | |
1da177e4 LT |
3282 | default: |
3283 | break; | |
3284 | } | |
3285 | ||
3286 | return NOTIFY_DONE; | |
3287 | } | |
3288 | ||
3289 | /* | |
3290 | * bond_netdev_event: handle netdev notifier chain events. | |
3291 | * | |
3292 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3293 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3294 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3295 | * dev_probe_lock). | |
3296 | */ | |
3d632c3f SH |
3297 | static int bond_netdev_event(struct notifier_block *this, |
3298 | unsigned long event, void *ptr) | |
1da177e4 LT |
3299 | { |
3300 | struct net_device *event_dev = (struct net_device *)ptr; | |
3301 | ||
5a03cdb7 | 3302 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3303 | event_dev ? event_dev->name : "None", |
3304 | event); | |
1da177e4 | 3305 | |
0b680e75 JV |
3306 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3307 | return NOTIFY_DONE; | |
3308 | ||
1da177e4 | 3309 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3310 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3311 | return bond_master_netdev_event(event, event_dev); |
3312 | } | |
3313 | ||
3314 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3315 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3316 | return bond_slave_netdev_event(event, event_dev); |
3317 | } | |
3318 | ||
3319 | return NOTIFY_DONE; | |
3320 | } | |
3321 | ||
c3ade5ca JV |
3322 | /* |
3323 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3324 | * | |
3325 | * We keep track of device IPs primarily to use as source addresses in | |
3326 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3327 | * | |
3328 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3329 | */ | |
3330 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3331 | { | |
3332 | struct in_ifaddr *ifa = ptr; | |
3333 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3334 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3335 | struct bonding *bond; |
3336 | struct vlan_entry *vlan; | |
c3ade5ca | 3337 | |
ec87fd3b | 3338 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3339 | if (bond->dev == event_dev) { |
3340 | switch (event) { | |
3341 | case NETDEV_UP: | |
3342 | bond->master_ip = ifa->ifa_local; | |
3343 | return NOTIFY_OK; | |
3344 | case NETDEV_DOWN: | |
3345 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3346 | return NOTIFY_OK; | |
3347 | default: | |
3348 | return NOTIFY_DONE; | |
3349 | } | |
3350 | } | |
3351 | ||
0883beca | 3352 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
3353 | vlan_dev = __vlan_find_dev_deep(bond->dev, |
3354 | vlan->vlan_id); | |
c3ade5ca JV |
3355 | if (vlan_dev == event_dev) { |
3356 | switch (event) { | |
3357 | case NETDEV_UP: | |
3358 | vlan->vlan_ip = ifa->ifa_local; | |
3359 | return NOTIFY_OK; | |
3360 | case NETDEV_DOWN: | |
3361 | vlan->vlan_ip = | |
3362 | bond_glean_dev_ip(vlan_dev); | |
3363 | return NOTIFY_OK; | |
3364 | default: | |
3365 | return NOTIFY_DONE; | |
3366 | } | |
3367 | } | |
3368 | } | |
3369 | } | |
3370 | return NOTIFY_DONE; | |
3371 | } | |
3372 | ||
1da177e4 LT |
3373 | static struct notifier_block bond_netdev_notifier = { |
3374 | .notifier_call = bond_netdev_event, | |
3375 | }; | |
3376 | ||
c3ade5ca JV |
3377 | static struct notifier_block bond_inetaddr_notifier = { |
3378 | .notifier_call = bond_inetaddr_event, | |
3379 | }; | |
3380 | ||
169a3e66 JV |
3381 | /*---------------------------- Hashing Policies -----------------------------*/ |
3382 | ||
6f6652be JV |
3383 | /* |
3384 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3385 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3386 | */ | |
a361c83c | 3387 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3388 | { |
3389 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3390 | struct iphdr *iph = ip_hdr(skb); | |
3391 | ||
f14c4e4e | 3392 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3393 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3394 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3395 | } |
3396 | ||
d3da6831 | 3397 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3398 | } |
3399 | ||
169a3e66 | 3400 | /* |
59c51591 | 3401 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3402 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3403 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3404 | */ | |
a361c83c | 3405 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3406 | { |
3407 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3408 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3409 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3410 | int layer4_xor = 0; |
3411 | ||
f14c4e4e | 3412 | if (skb->protocol == htons(ETH_P_IP)) { |
56f8a75c | 3413 | if (!ip_is_fragment(iph) && |
169a3e66 JV |
3414 | (iph->protocol == IPPROTO_TCP || |
3415 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3416 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3417 | } |
3418 | return (layer4_xor ^ | |
3419 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3420 | ||
3421 | } | |
3422 | ||
d3da6831 | 3423 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3424 | } |
3425 | ||
3426 | /* | |
3427 | * Hash for the output device based upon layer 2 data | |
3428 | */ | |
a361c83c | 3429 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3430 | { |
3431 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3432 | ||
d3da6831 | 3433 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3434 | } |
3435 | ||
1da177e4 LT |
3436 | /*-------------------------- Device entry points ----------------------------*/ |
3437 | ||
3438 | static int bond_open(struct net_device *bond_dev) | |
3439 | { | |
454d7c9b | 3440 | struct bonding *bond = netdev_priv(bond_dev); |
ba3211cc PP |
3441 | struct slave *slave; |
3442 | int i; | |
1da177e4 | 3443 | |
ba3211cc PP |
3444 | /* reset slave->backup and slave->inactive */ |
3445 | read_lock(&bond->lock); | |
3446 | if (bond->slave_cnt > 0) { | |
3447 | read_lock(&bond->curr_slave_lock); | |
3448 | bond_for_each_slave(bond, slave, i) { | |
3449 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3450 | && (slave != bond->curr_active_slave)) { | |
3451 | bond_set_slave_inactive_flags(slave); | |
3452 | } else { | |
3453 | bond_set_slave_active_flags(slave); | |
3454 | } | |
3455 | } | |
3456 | read_unlock(&bond->curr_slave_lock); | |
3457 | } | |
3458 | read_unlock(&bond->lock); | |
3459 | ||
5a37e8ca FL |
3460 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3461 | ||
58402054 | 3462 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3463 | /* bond_alb_initialize must be called before the timer |
3464 | * is started. | |
3465 | */ | |
3466 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3467 | /* something went wrong - fail the open operation */ | |
b473946a | 3468 | return -ENOMEM; |
1da177e4 LT |
3469 | } |
3470 | ||
1b76b316 JV |
3471 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3472 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3473 | } |
3474 | ||
3475 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3476 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3477 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3478 | } |
3479 | ||
3480 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3481 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3482 | INIT_DELAYED_WORK(&bond->arp_work, | |
3483 | bond_activebackup_arp_mon); | |
3484 | else | |
3485 | INIT_DELAYED_WORK(&bond->arp_work, | |
3486 | bond_loadbalance_arp_mon); | |
3487 | ||
3488 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3489 | if (bond->params.arp_validate) |
3aba891d | 3490 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3491 | } |
3492 | ||
3493 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3494 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3495 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3496 | /* register to receive LACPDUs */ |
3aba891d | 3497 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3498 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3499 | } |
3500 | ||
3501 | return 0; | |
3502 | } | |
3503 | ||
3504 | static int bond_close(struct net_device *bond_dev) | |
3505 | { | |
454d7c9b | 3506 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3507 | |
1da177e4 LT |
3508 | write_lock_bh(&bond->lock); |
3509 | ||
ad246c99 BH |
3510 | bond->send_peer_notif = 0; |
3511 | ||
1da177e4 LT |
3512 | write_unlock_bh(&bond->lock); |
3513 | ||
1da177e4 | 3514 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
e6d265e8 | 3515 | cancel_delayed_work_sync(&bond->mii_work); |
1da177e4 LT |
3516 | } |
3517 | ||
3518 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
e6d265e8 | 3519 | cancel_delayed_work_sync(&bond->arp_work); |
1da177e4 LT |
3520 | } |
3521 | ||
3522 | switch (bond->params.mode) { | |
3523 | case BOND_MODE_8023AD: | |
e6d265e8 | 3524 | cancel_delayed_work_sync(&bond->ad_work); |
1da177e4 LT |
3525 | break; |
3526 | case BOND_MODE_TLB: | |
3527 | case BOND_MODE_ALB: | |
e6d265e8 | 3528 | cancel_delayed_work_sync(&bond->alb_work); |
1da177e4 LT |
3529 | break; |
3530 | default: | |
3531 | break; | |
3532 | } | |
3533 | ||
5a37e8ca | 3534 | if (delayed_work_pending(&bond->mcast_work)) |
e6d265e8 | 3535 | cancel_delayed_work_sync(&bond->mcast_work); |
1da177e4 | 3536 | |
58402054 | 3537 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3538 | /* Must be called only after all |
3539 | * slaves have been released | |
3540 | */ | |
3541 | bond_alb_deinitialize(bond); | |
3542 | } | |
3aba891d | 3543 | bond->recv_probe = NULL; |
1da177e4 LT |
3544 | |
3545 | return 0; | |
3546 | } | |
3547 | ||
28172739 ED |
3548 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3549 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3550 | { |
454d7c9b | 3551 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3552 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3553 | struct slave *slave; |
3554 | int i; | |
3555 | ||
28172739 | 3556 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3557 | |
3558 | read_lock_bh(&bond->lock); | |
3559 | ||
3560 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3561 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3562 | dev_get_stats(slave->dev, &temp); |
3563 | ||
3564 | stats->rx_packets += sstats->rx_packets; | |
3565 | stats->rx_bytes += sstats->rx_bytes; | |
3566 | stats->rx_errors += sstats->rx_errors; | |
3567 | stats->rx_dropped += sstats->rx_dropped; | |
3568 | ||
3569 | stats->tx_packets += sstats->tx_packets; | |
3570 | stats->tx_bytes += sstats->tx_bytes; | |
3571 | stats->tx_errors += sstats->tx_errors; | |
3572 | stats->tx_dropped += sstats->tx_dropped; | |
3573 | ||
3574 | stats->multicast += sstats->multicast; | |
3575 | stats->collisions += sstats->collisions; | |
3576 | ||
3577 | stats->rx_length_errors += sstats->rx_length_errors; | |
3578 | stats->rx_over_errors += sstats->rx_over_errors; | |
3579 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3580 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3581 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3582 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3583 | ||
3584 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3585 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3586 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3587 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3588 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3589 | } |
3590 | ||
1da177e4 LT |
3591 | read_unlock_bh(&bond->lock); |
3592 | ||
3593 | return stats; | |
3594 | } | |
3595 | ||
3596 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3597 | { | |
3598 | struct net_device *slave_dev = NULL; | |
3599 | struct ifbond k_binfo; | |
3600 | struct ifbond __user *u_binfo = NULL; | |
3601 | struct ifslave k_sinfo; | |
3602 | struct ifslave __user *u_sinfo = NULL; | |
3603 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3604 | int res = 0; |
3605 | ||
a4aee5c8 | 3606 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3607 | |
3608 | switch (cmd) { | |
1da177e4 LT |
3609 | case SIOCGMIIPHY: |
3610 | mii = if_mii(ifr); | |
3d632c3f | 3611 | if (!mii) |
1da177e4 | 3612 | return -EINVAL; |
3d632c3f | 3613 | |
1da177e4 LT |
3614 | mii->phy_id = 0; |
3615 | /* Fall Through */ | |
3616 | case SIOCGMIIREG: | |
3617 | /* | |
3618 | * We do this again just in case we were called by SIOCGMIIREG | |
3619 | * instead of SIOCGMIIPHY. | |
3620 | */ | |
3621 | mii = if_mii(ifr); | |
3d632c3f | 3622 | if (!mii) |
1da177e4 | 3623 | return -EINVAL; |
3d632c3f | 3624 | |
1da177e4 LT |
3625 | |
3626 | if (mii->reg_num == 1) { | |
454d7c9b | 3627 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3628 | mii->val_out = 0; |
6603a6f2 | 3629 | read_lock(&bond->lock); |
1da177e4 | 3630 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3631 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3632 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3633 | |
1da177e4 | 3634 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3635 | read_unlock(&bond->lock); |
1da177e4 LT |
3636 | } |
3637 | ||
3638 | return 0; | |
3639 | case BOND_INFO_QUERY_OLD: | |
3640 | case SIOCBONDINFOQUERY: | |
3641 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3642 | ||
3d632c3f | 3643 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3644 | return -EFAULT; |
1da177e4 LT |
3645 | |
3646 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3647 | if (res == 0 && |
3648 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3649 | return -EFAULT; | |
1da177e4 LT |
3650 | |
3651 | return res; | |
3652 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3653 | case SIOCBONDSLAVEINFOQUERY: | |
3654 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3655 | ||
3d632c3f | 3656 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3657 | return -EFAULT; |
1da177e4 LT |
3658 | |
3659 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3660 | if (res == 0 && |
3661 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3662 | return -EFAULT; | |
1da177e4 LT |
3663 | |
3664 | return res; | |
3665 | default: | |
3666 | /* Go on */ | |
3667 | break; | |
3668 | } | |
3669 | ||
3d632c3f | 3670 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3671 | return -EPERM; |
1da177e4 | 3672 | |
ec87fd3b | 3673 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3674 | |
a4aee5c8 | 3675 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3676 | |
3d632c3f | 3677 | if (!slave_dev) |
1da177e4 | 3678 | res = -ENODEV; |
3d632c3f | 3679 | else { |
a4aee5c8 | 3680 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3681 | switch (cmd) { |
3682 | case BOND_ENSLAVE_OLD: | |
3683 | case SIOCBONDENSLAVE: | |
3684 | res = bond_enslave(bond_dev, slave_dev); | |
3685 | break; | |
3686 | case BOND_RELEASE_OLD: | |
3687 | case SIOCBONDRELEASE: | |
3688 | res = bond_release(bond_dev, slave_dev); | |
3689 | break; | |
3690 | case BOND_SETHWADDR_OLD: | |
3691 | case SIOCBONDSETHWADDR: | |
3692 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3693 | break; | |
3694 | case BOND_CHANGE_ACTIVE_OLD: | |
3695 | case SIOCBONDCHANGEACTIVE: | |
3696 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3697 | break; | |
3698 | default: | |
3699 | res = -EOPNOTSUPP; | |
3700 | } | |
3701 | ||
3702 | dev_put(slave_dev); | |
3703 | } | |
3704 | ||
1da177e4 LT |
3705 | return res; |
3706 | } | |
3707 | ||
22bedad3 JP |
3708 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3709 | struct netdev_hw_addr_list *list, | |
3710 | int addrlen) | |
3711 | { | |
3712 | struct netdev_hw_addr *ha; | |
3713 | ||
3714 | netdev_hw_addr_list_for_each(ha, list) | |
3715 | if (!memcmp(ha->addr, addr, addrlen)) | |
3716 | return true; | |
3717 | ||
3718 | return false; | |
3719 | } | |
3720 | ||
d03462b9 | 3721 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3722 | { |
454d7c9b | 3723 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3724 | |
d03462b9 JP |
3725 | if (change & IFF_PROMISC) |
3726 | bond_set_promiscuity(bond, | |
3727 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3728 | |
d03462b9 JP |
3729 | if (change & IFF_ALLMULTI) |
3730 | bond_set_allmulti(bond, | |
3731 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3732 | } | |
1da177e4 | 3733 | |
d03462b9 JP |
3734 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3735 | { | |
3736 | struct bonding *bond = netdev_priv(bond_dev); | |
3737 | struct netdev_hw_addr *ha; | |
3738 | bool found; | |
1da177e4 | 3739 | |
80ee5ad2 JV |
3740 | read_lock(&bond->lock); |
3741 | ||
1da177e4 | 3742 | /* looking for addresses to add to slaves' mc list */ |
22bedad3 JP |
3743 | netdev_for_each_mc_addr(ha, bond_dev) { |
3744 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3745 | bond_dev->addr_len); | |
3746 | if (!found) | |
3747 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3748 | } |
3749 | ||
3750 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3751 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3752 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3753 | bond_dev->addr_len); | |
3754 | if (!found) | |
3755 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3756 | } |
3757 | ||
3758 | /* save master's multicast list */ | |
22bedad3 JP |
3759 | __hw_addr_flush(&bond->mc_list); |
3760 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3761 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3762 | |
80ee5ad2 | 3763 | read_unlock(&bond->lock); |
1da177e4 LT |
3764 | } |
3765 | ||
00829823 SH |
3766 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3767 | { | |
3768 | struct bonding *bond = netdev_priv(dev); | |
3769 | struct slave *slave = bond->first_slave; | |
3770 | ||
3771 | if (slave) { | |
3772 | const struct net_device_ops *slave_ops | |
3773 | = slave->dev->netdev_ops; | |
3774 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3775 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3776 | } |
3777 | return 0; | |
3778 | } | |
3779 | ||
1da177e4 LT |
3780 | /* |
3781 | * Change the MTU of all of a master's slaves to match the master | |
3782 | */ | |
3783 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3784 | { | |
454d7c9b | 3785 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3786 | struct slave *slave, *stop_at; |
3787 | int res = 0; | |
3788 | int i; | |
3789 | ||
5a03cdb7 | 3790 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3791 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3792 | |
3793 | /* Can't hold bond->lock with bh disabled here since | |
3794 | * some base drivers panic. On the other hand we can't | |
3795 | * hold bond->lock without bh disabled because we'll | |
3796 | * deadlock. The only solution is to rely on the fact | |
3797 | * that we're under rtnl_lock here, and the slaves | |
3798 | * list won't change. This doesn't solve the problem | |
3799 | * of setting the slave's MTU while it is | |
3800 | * transmitting, but the assumption is that the base | |
3801 | * driver can handle that. | |
3802 | * | |
3803 | * TODO: figure out a way to safely iterate the slaves | |
3804 | * list, but without holding a lock around the actual | |
3805 | * call to the base driver. | |
3806 | */ | |
3807 | ||
3808 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3809 | pr_debug("s %p s->p %p c_m %p\n", |
3810 | slave, | |
3811 | slave->prev, | |
3812 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3813 | |
1da177e4 LT |
3814 | res = dev_set_mtu(slave->dev, new_mtu); |
3815 | ||
3816 | if (res) { | |
3817 | /* If we failed to set the slave's mtu to the new value | |
3818 | * we must abort the operation even in ACTIVE_BACKUP | |
3819 | * mode, because if we allow the backup slaves to have | |
3820 | * different mtu values than the active slave we'll | |
3821 | * need to change their mtu when doing a failover. That | |
3822 | * means changing their mtu from timer context, which | |
3823 | * is probably not a good idea. | |
3824 | */ | |
5a03cdb7 | 3825 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3826 | goto unwind; |
3827 | } | |
3828 | } | |
3829 | ||
3830 | bond_dev->mtu = new_mtu; | |
3831 | ||
3832 | return 0; | |
3833 | ||
3834 | unwind: | |
3835 | /* unwind from head to the slave that failed */ | |
3836 | stop_at = slave; | |
3837 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3838 | int tmp_res; | |
3839 | ||
3840 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3841 | if (tmp_res) { | |
a4aee5c8 JP |
3842 | pr_debug("unwind err %d dev %s\n", |
3843 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3844 | } |
3845 | } | |
3846 | ||
3847 | return res; | |
3848 | } | |
3849 | ||
3850 | /* | |
3851 | * Change HW address | |
3852 | * | |
3853 | * Note that many devices must be down to change the HW address, and | |
3854 | * downing the master releases all slaves. We can make bonds full of | |
3855 | * bonding devices to test this, however. | |
3856 | */ | |
3857 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3858 | { | |
454d7c9b | 3859 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3860 | struct sockaddr *sa = addr, tmp_sa; |
3861 | struct slave *slave, *stop_at; | |
3862 | int res = 0; | |
3863 | int i; | |
3864 | ||
eb7cc59a SH |
3865 | if (bond->params.mode == BOND_MODE_ALB) |
3866 | return bond_alb_set_mac_address(bond_dev, addr); | |
3867 | ||
3868 | ||
a4aee5c8 JP |
3869 | pr_debug("bond=%p, name=%s\n", |
3870 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3871 | |
dd957c57 | 3872 | /* |
3915c1e8 JV |
3873 | * If fail_over_mac is set to active, do nothing and return |
3874 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3875 | */ |
3915c1e8 | 3876 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3877 | return 0; |
2ab82852 | 3878 | |
3d632c3f | 3879 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3880 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3881 | |
3882 | /* Can't hold bond->lock with bh disabled here since | |
3883 | * some base drivers panic. On the other hand we can't | |
3884 | * hold bond->lock without bh disabled because we'll | |
3885 | * deadlock. The only solution is to rely on the fact | |
3886 | * that we're under rtnl_lock here, and the slaves | |
3887 | * list won't change. This doesn't solve the problem | |
3888 | * of setting the slave's hw address while it is | |
3889 | * transmitting, but the assumption is that the base | |
3890 | * driver can handle that. | |
3891 | * | |
3892 | * TODO: figure out a way to safely iterate the slaves | |
3893 | * list, but without holding a lock around the actual | |
3894 | * call to the base driver. | |
3895 | */ | |
3896 | ||
3897 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3898 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3899 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3900 | |
eb7cc59a | 3901 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3902 | res = -EOPNOTSUPP; |
5a03cdb7 | 3903 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3904 | goto unwind; |
3905 | } | |
3906 | ||
3907 | res = dev_set_mac_address(slave->dev, addr); | |
3908 | if (res) { | |
3909 | /* TODO: consider downing the slave | |
3910 | * and retry ? | |
3911 | * User should expect communications | |
3912 | * breakage anyway until ARP finish | |
3913 | * updating, so... | |
3914 | */ | |
5a03cdb7 | 3915 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3916 | goto unwind; |
3917 | } | |
3918 | } | |
3919 | ||
3920 | /* success */ | |
3921 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3922 | return 0; | |
3923 | ||
3924 | unwind: | |
3925 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3926 | tmp_sa.sa_family = bond_dev->type; | |
3927 | ||
3928 | /* unwind from head to the slave that failed */ | |
3929 | stop_at = slave; | |
3930 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3931 | int tmp_res; | |
3932 | ||
3933 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3934 | if (tmp_res) { | |
a4aee5c8 JP |
3935 | pr_debug("unwind err %d dev %s\n", |
3936 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3937 | } |
3938 | } | |
3939 | ||
3940 | return res; | |
3941 | } | |
3942 | ||
3943 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3944 | { | |
454d7c9b | 3945 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3946 | struct slave *slave, *start_at; |
cf5f9044 | 3947 | int i, slave_no, res = 1; |
a2fd940f | 3948 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3949 | |
cf5f9044 | 3950 | /* |
a2fd940f AG |
3951 | * Start with the curr_active_slave that joined the bond as the |
3952 | * default for sending IGMP traffic. For failover purposes one | |
3953 | * needs to maintain some consistency for the interface that will | |
3954 | * send the join/membership reports. The curr_active_slave found | |
3955 | * will send all of this type of traffic. | |
cf5f9044 | 3956 | */ |
00ae7028 | 3957 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3958 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3959 | |
a2fd940f AG |
3960 | read_lock(&bond->curr_slave_lock); |
3961 | slave = bond->curr_active_slave; | |
3962 | read_unlock(&bond->curr_slave_lock); | |
3963 | ||
3964 | if (!slave) | |
3965 | goto out; | |
3966 | } else { | |
3967 | /* | |
3968 | * Concurrent TX may collide on rr_tx_counter; we accept | |
3969 | * that as being rare enough not to justify using an | |
3970 | * atomic op here. | |
3971 | */ | |
3972 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
3973 | ||
3974 | bond_for_each_slave(bond, slave, i) { | |
3975 | slave_no--; | |
3976 | if (slave_no < 0) | |
3977 | break; | |
3978 | } | |
1da177e4 LT |
3979 | } |
3980 | ||
cf5f9044 | 3981 | start_at = slave; |
1da177e4 LT |
3982 | bond_for_each_slave_from(bond, slave, i, start_at) { |
3983 | if (IS_UP(slave->dev) && | |
3984 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 3985 | bond_is_active_slave(slave)) { |
1da177e4 | 3986 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
3987 | break; |
3988 | } | |
3989 | } | |
3990 | ||
1da177e4 LT |
3991 | out: |
3992 | if (res) { | |
3993 | /* no suitable interface, frame not sent */ | |
3994 | dev_kfree_skb(skb); | |
3995 | } | |
0693e88e | 3996 | |
ec634fe3 | 3997 | return NETDEV_TX_OK; |
1da177e4 LT |
3998 | } |
3999 | ||
075897ce | 4000 | |
1da177e4 LT |
4001 | /* |
4002 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4003 | * the bond has a usable interface. | |
4004 | */ | |
4005 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4006 | { | |
454d7c9b | 4007 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4008 | int res = 1; |
4009 | ||
1da177e4 LT |
4010 | read_lock(&bond->curr_slave_lock); |
4011 | ||
0693e88e MM |
4012 | if (bond->curr_active_slave) |
4013 | res = bond_dev_queue_xmit(bond, skb, | |
4014 | bond->curr_active_slave->dev); | |
1da177e4 | 4015 | |
3d632c3f | 4016 | if (res) |
1da177e4 LT |
4017 | /* no suitable interface, frame not sent */ |
4018 | dev_kfree_skb(skb); | |
3d632c3f | 4019 | |
1da177e4 | 4020 | read_unlock(&bond->curr_slave_lock); |
0693e88e | 4021 | |
ec634fe3 | 4022 | return NETDEV_TX_OK; |
1da177e4 LT |
4023 | } |
4024 | ||
4025 | /* | |
169a3e66 JV |
4026 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4027 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4028 | * find the next active slave. | |
1da177e4 LT |
4029 | */ |
4030 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4031 | { | |
454d7c9b | 4032 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4033 | struct slave *slave, *start_at; |
4034 | int slave_no; | |
4035 | int i; | |
4036 | int res = 1; | |
4037 | ||
a361c83c | 4038 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4039 | |
4040 | bond_for_each_slave(bond, slave, i) { | |
4041 | slave_no--; | |
3d632c3f | 4042 | if (slave_no < 0) |
1da177e4 | 4043 | break; |
1da177e4 LT |
4044 | } |
4045 | ||
4046 | start_at = slave; | |
4047 | ||
4048 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4049 | if (IS_UP(slave->dev) && | |
4050 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4051 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4052 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4053 | break; | |
4054 | } | |
4055 | } | |
4056 | ||
1da177e4 LT |
4057 | if (res) { |
4058 | /* no suitable interface, frame not sent */ | |
4059 | dev_kfree_skb(skb); | |
4060 | } | |
0693e88e | 4061 | |
ec634fe3 | 4062 | return NETDEV_TX_OK; |
1da177e4 LT |
4063 | } |
4064 | ||
4065 | /* | |
4066 | * in broadcast mode, we send everything to all usable interfaces. | |
4067 | */ | |
4068 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4069 | { | |
454d7c9b | 4070 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4071 | struct slave *slave, *start_at; |
4072 | struct net_device *tx_dev = NULL; | |
4073 | int i; | |
4074 | int res = 1; | |
4075 | ||
1da177e4 LT |
4076 | read_lock(&bond->curr_slave_lock); |
4077 | start_at = bond->curr_active_slave; | |
4078 | read_unlock(&bond->curr_slave_lock); | |
4079 | ||
3d632c3f | 4080 | if (!start_at) |
1da177e4 | 4081 | goto out; |
1da177e4 LT |
4082 | |
4083 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4084 | if (IS_UP(slave->dev) && | |
4085 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4086 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4087 | if (tx_dev) { |
4088 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4089 | if (!skb2) { | |
a4aee5c8 | 4090 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4091 | bond_dev->name); |
1da177e4 LT |
4092 | continue; |
4093 | } | |
4094 | ||
4095 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4096 | if (res) { | |
4097 | dev_kfree_skb(skb2); | |
4098 | continue; | |
4099 | } | |
4100 | } | |
4101 | tx_dev = slave->dev; | |
4102 | } | |
4103 | } | |
4104 | ||
3d632c3f | 4105 | if (tx_dev) |
1da177e4 | 4106 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4107 | |
4108 | out: | |
3d632c3f | 4109 | if (res) |
1da177e4 LT |
4110 | /* no suitable interface, frame not sent */ |
4111 | dev_kfree_skb(skb); | |
3d632c3f | 4112 | |
1da177e4 | 4113 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4114 | return NETDEV_TX_OK; |
1da177e4 LT |
4115 | } |
4116 | ||
4117 | /*------------------------- Device initialization ---------------------------*/ | |
4118 | ||
6f6652be JV |
4119 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4120 | { | |
4121 | switch (bond->params.xmit_policy) { | |
4122 | case BOND_XMIT_POLICY_LAYER23: | |
4123 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4124 | break; | |
4125 | case BOND_XMIT_POLICY_LAYER34: | |
4126 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4127 | break; | |
4128 | case BOND_XMIT_POLICY_LAYER2: | |
4129 | default: | |
4130 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4131 | break; | |
4132 | } | |
4133 | } | |
4134 | ||
bb1d9123 AG |
4135 | /* |
4136 | * Lookup the slave that corresponds to a qid | |
4137 | */ | |
4138 | static inline int bond_slave_override(struct bonding *bond, | |
4139 | struct sk_buff *skb) | |
4140 | { | |
4141 | int i, res = 1; | |
4142 | struct slave *slave = NULL; | |
4143 | struct slave *check_slave; | |
4144 | ||
0693e88e MM |
4145 | if (!skb->queue_mapping) |
4146 | return 1; | |
bb1d9123 AG |
4147 | |
4148 | /* Find out if any slaves have the same mapping as this skb. */ | |
4149 | bond_for_each_slave(bond, check_slave, i) { | |
4150 | if (check_slave->queue_id == skb->queue_mapping) { | |
4151 | slave = check_slave; | |
4152 | break; | |
4153 | } | |
4154 | } | |
4155 | ||
4156 | /* If the slave isn't UP, use default transmit policy. */ | |
4157 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4158 | (slave->link == BOND_LINK_UP)) { | |
4159 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4160 | } | |
4161 | ||
bb1d9123 AG |
4162 | return res; |
4163 | } | |
4164 | ||
374eeb5a | 4165 | |
bb1d9123 AG |
4166 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4167 | { | |
4168 | /* | |
4169 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4170 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4171 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4172 | * way down to the bonding driver. | |
4173 | */ | |
fd0e435b PO |
4174 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4175 | ||
374eeb5a NH |
4176 | /* |
4177 | * Save the original txq to restore before passing to the driver | |
4178 | */ | |
4179 | bond_queue_mapping(skb) = skb->queue_mapping; | |
4180 | ||
fd0e435b | 4181 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4182 | do { |
fd0e435b | 4183 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4184 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4185 | } |
4186 | return txq; | |
bb1d9123 AG |
4187 | } |
4188 | ||
0693e88e | 4189 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4190 | { |
bb1d9123 AG |
4191 | struct bonding *bond = netdev_priv(dev); |
4192 | ||
4193 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4194 | if (!bond_slave_override(bond, skb)) | |
4195 | return NETDEV_TX_OK; | |
4196 | } | |
00829823 SH |
4197 | |
4198 | switch (bond->params.mode) { | |
4199 | case BOND_MODE_ROUNDROBIN: | |
4200 | return bond_xmit_roundrobin(skb, dev); | |
4201 | case BOND_MODE_ACTIVEBACKUP: | |
4202 | return bond_xmit_activebackup(skb, dev); | |
4203 | case BOND_MODE_XOR: | |
4204 | return bond_xmit_xor(skb, dev); | |
4205 | case BOND_MODE_BROADCAST: | |
4206 | return bond_xmit_broadcast(skb, dev); | |
4207 | case BOND_MODE_8023AD: | |
4208 | return bond_3ad_xmit_xor(skb, dev); | |
4209 | case BOND_MODE_ALB: | |
4210 | case BOND_MODE_TLB: | |
4211 | return bond_alb_xmit(skb, dev); | |
4212 | default: | |
4213 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4214 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4215 | dev->name, bond->params.mode); | |
00829823 SH |
4216 | WARN_ON_ONCE(1); |
4217 | dev_kfree_skb(skb); | |
4218 | return NETDEV_TX_OK; | |
4219 | } | |
4220 | } | |
4221 | ||
0693e88e MM |
4222 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4223 | { | |
4224 | struct bonding *bond = netdev_priv(dev); | |
4225 | netdev_tx_t ret = NETDEV_TX_OK; | |
4226 | ||
4227 | /* | |
4228 | * If we risk deadlock from transmitting this in the | |
4229 | * netpoll path, tell netpoll to queue the frame for later tx | |
4230 | */ | |
4231 | if (is_netpoll_tx_blocked(dev)) | |
4232 | return NETDEV_TX_BUSY; | |
4233 | ||
4234 | read_lock(&bond->lock); | |
4235 | ||
4236 | if (bond->slave_cnt) | |
4237 | ret = __bond_start_xmit(skb, dev); | |
4238 | else | |
4239 | dev_kfree_skb(skb); | |
4240 | ||
4241 | read_unlock(&bond->lock); | |
4242 | ||
4243 | return ret; | |
4244 | } | |
00829823 | 4245 | |
1da177e4 LT |
4246 | /* |
4247 | * set bond mode specific net device operations | |
4248 | */ | |
a77b5325 | 4249 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4250 | { |
169a3e66 JV |
4251 | struct net_device *bond_dev = bond->dev; |
4252 | ||
1da177e4 LT |
4253 | switch (mode) { |
4254 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4255 | break; |
4256 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4257 | break; |
4258 | case BOND_MODE_XOR: | |
6f6652be | 4259 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4260 | break; |
4261 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4262 | break; |
4263 | case BOND_MODE_8023AD: | |
6f6652be | 4264 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4265 | break; |
1da177e4 | 4266 | case BOND_MODE_ALB: |
8f903c70 JV |
4267 | /* FALLTHRU */ |
4268 | case BOND_MODE_TLB: | |
1da177e4 LT |
4269 | break; |
4270 | default: | |
4271 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4272 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4273 | bond_dev->name, mode); | |
1da177e4 LT |
4274 | break; |
4275 | } | |
4276 | } | |
4277 | ||
217df670 JV |
4278 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4279 | struct ethtool_drvinfo *drvinfo) | |
4280 | { | |
4281 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4282 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4283 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4284 | } | |
4285 | ||
7282d491 | 4286 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4287 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac | 4288 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4289 | }; |
4290 | ||
eb7cc59a | 4291 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4292 | .ndo_init = bond_init, |
9e71626c | 4293 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4294 | .ndo_open = bond_open, |
4295 | .ndo_stop = bond_close, | |
00829823 | 4296 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4297 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4298 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 4299 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 4300 | .ndo_change_rx_flags = bond_change_rx_flags, |
afc4b13d | 4301 | .ndo_set_rx_mode = bond_set_multicast_list, |
eb7cc59a | 4302 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 4303 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4304 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 4305 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 4306 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 4307 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4308 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4309 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4310 | .ndo_poll_controller = bond_poll_controller, | |
4311 | #endif | |
9232ecca JP |
4312 | .ndo_add_slave = bond_enslave, |
4313 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4314 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4315 | }; |
4316 | ||
9e2e61fb AW |
4317 | static void bond_destructor(struct net_device *bond_dev) |
4318 | { | |
4319 | struct bonding *bond = netdev_priv(bond_dev); | |
4320 | if (bond->wq) | |
4321 | destroy_workqueue(bond->wq); | |
4322 | free_netdev(bond_dev); | |
4323 | } | |
4324 | ||
181470fc | 4325 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4326 | { |
454d7c9b | 4327 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4328 | |
1da177e4 LT |
4329 | /* initialize rwlocks */ |
4330 | rwlock_init(&bond->lock); | |
4331 | rwlock_init(&bond->curr_slave_lock); | |
4332 | ||
d2991f75 | 4333 | bond->params = bonding_defaults; |
1da177e4 LT |
4334 | |
4335 | /* Initialize pointers */ | |
1da177e4 LT |
4336 | bond->dev = bond_dev; |
4337 | INIT_LIST_HEAD(&bond->vlan_list); | |
4338 | ||
4339 | /* Initialize the device entry points */ | |
181470fc | 4340 | ether_setup(bond_dev); |
eb7cc59a | 4341 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4342 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4343 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4344 | |
9e2e61fb | 4345 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4346 | |
4347 | /* Initialize the device options */ | |
4348 | bond_dev->tx_queue_len = 0; | |
4349 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4350 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 4351 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 4352 | |
1da177e4 LT |
4353 | /* At first, we block adding VLANs. That's the only way to |
4354 | * prevent problems that occur when adding VLANs over an | |
4355 | * empty bond. The block will be removed once non-challenged | |
4356 | * slaves are enslaved. | |
4357 | */ | |
4358 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4359 | ||
932ff279 | 4360 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4361 | * transmitting */ |
4362 | bond_dev->features |= NETIF_F_LLTX; | |
4363 | ||
4364 | /* By default, we declare the bond to be fully | |
4365 | * VLAN hardware accelerated capable. Special | |
4366 | * care is taken in the various xmit functions | |
4367 | * when there are slaves that are not hw accel | |
4368 | * capable | |
4369 | */ | |
1da177e4 | 4370 | |
b2a103e6 MM |
4371 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
4372 | NETIF_F_HW_VLAN_TX | | |
4373 | NETIF_F_HW_VLAN_RX | | |
4374 | NETIF_F_HW_VLAN_FILTER; | |
4375 | ||
4376 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM); | |
4377 | bond_dev->features |= bond_dev->hw_features; | |
1da177e4 LT |
4378 | } |
4379 | ||
fdaea7a9 JV |
4380 | static void bond_work_cancel_all(struct bonding *bond) |
4381 | { | |
fdaea7a9 | 4382 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) |
e6d265e8 | 4383 | cancel_delayed_work_sync(&bond->mii_work); |
fdaea7a9 JV |
4384 | |
4385 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
e6d265e8 | 4386 | cancel_delayed_work_sync(&bond->arp_work); |
fdaea7a9 JV |
4387 | |
4388 | if (bond->params.mode == BOND_MODE_ALB && | |
4389 | delayed_work_pending(&bond->alb_work)) | |
e6d265e8 | 4390 | cancel_delayed_work_sync(&bond->alb_work); |
fdaea7a9 JV |
4391 | |
4392 | if (bond->params.mode == BOND_MODE_8023AD && | |
4393 | delayed_work_pending(&bond->ad_work)) | |
e6d265e8 | 4394 | cancel_delayed_work_sync(&bond->ad_work); |
5a37e8ca FL |
4395 | |
4396 | if (delayed_work_pending(&bond->mcast_work)) | |
e6d265e8 | 4397 | cancel_delayed_work_sync(&bond->mcast_work); |
fdaea7a9 JV |
4398 | } |
4399 | ||
c67dfb29 EB |
4400 | /* |
4401 | * Destroy a bonding device. | |
4402 | * Must be under rtnl_lock when this function is called. | |
4403 | */ | |
4404 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4405 | { |
454d7c9b | 4406 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4407 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4408 | |
f6dc31a8 WC |
4409 | bond_netpoll_cleanup(bond_dev); |
4410 | ||
c67dfb29 EB |
4411 | /* Release the bonded slaves */ |
4412 | bond_release_all(bond_dev); | |
4413 | ||
a434e43f JV |
4414 | list_del(&bond->bond_list); |
4415 | ||
4416 | bond_work_cancel_all(bond); | |
4417 | ||
a434e43f | 4418 | bond_remove_proc_entry(bond); |
c67dfb29 | 4419 | |
f073c7ca TI |
4420 | bond_debug_unregister(bond); |
4421 | ||
22bedad3 | 4422 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4423 | |
4424 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4425 | list_del(&vlan->vlan_list); | |
4426 | kfree(vlan); | |
4427 | } | |
a434e43f JV |
4428 | } |
4429 | ||
1da177e4 LT |
4430 | /*------------------------- Module initialization ---------------------------*/ |
4431 | ||
4432 | /* | |
4433 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4434 | * number of the mode or its string name. A bit complicated because |
4435 | * some mode names are substrings of other names, and calls from sysfs | |
4436 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4437 | */ |
325dcf7a | 4438 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4439 | { |
54b87323 | 4440 | int modeint = -1, i, rv; |
a42e534f | 4441 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4442 | |
a42e534f JV |
4443 | for (p = (char *)buf; *p; p++) |
4444 | if (!(isdigit(*p) || isspace(*p))) | |
4445 | break; | |
4446 | ||
4447 | if (*p) | |
ece95f7f | 4448 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4449 | else |
54b87323 | 4450 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4451 | |
4452 | if (!rv) | |
4453 | return -1; | |
1da177e4 LT |
4454 | |
4455 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4456 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4457 | return tbl[i].mode; |
4458 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4459 | return tbl[i].mode; |
1da177e4 LT |
4460 | } |
4461 | ||
4462 | return -1; | |
4463 | } | |
4464 | ||
4465 | static int bond_check_params(struct bond_params *params) | |
4466 | { | |
a549952a | 4467 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4468 | |
1da177e4 LT |
4469 | /* |
4470 | * Convert string parameters. | |
4471 | */ | |
4472 | if (mode) { | |
4473 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4474 | if (bond_mode == -1) { | |
a4aee5c8 | 4475 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4476 | mode == NULL ? "NULL" : mode); |
4477 | return -EINVAL; | |
4478 | } | |
4479 | } | |
4480 | ||
169a3e66 JV |
4481 | if (xmit_hash_policy) { |
4482 | if ((bond_mode != BOND_MODE_XOR) && | |
4483 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4484 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4485 | bond_mode_name(bond_mode)); |
4486 | } else { | |
4487 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4488 | xmit_hashtype_tbl); | |
4489 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4490 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4491 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4492 | xmit_hash_policy); |
4493 | return -EINVAL; | |
4494 | } | |
4495 | } | |
4496 | } | |
4497 | ||
1da177e4 LT |
4498 | if (lacp_rate) { |
4499 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4500 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4501 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4502 | } else { |
4503 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4504 | if (lacp_fast == -1) { | |
a4aee5c8 | 4505 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4506 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4507 | return -EINVAL; | |
4508 | } | |
4509 | } | |
4510 | } | |
4511 | ||
fd989c83 JV |
4512 | if (ad_select) { |
4513 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4514 | if (params->ad_select == -1) { | |
a4aee5c8 | 4515 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4516 | ad_select == NULL ? "NULL" : ad_select); |
4517 | return -EINVAL; | |
4518 | } | |
4519 | ||
4520 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4521 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4522 | } |
4523 | } else { | |
4524 | params->ad_select = BOND_AD_STABLE; | |
4525 | } | |
4526 | ||
f5841306 | 4527 | if (max_bonds < 0) { |
a4aee5c8 JP |
4528 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4529 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4530 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4531 | } | |
4532 | ||
4533 | if (miimon < 0) { | |
a4aee5c8 JP |
4534 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4535 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4536 | miimon = BOND_LINK_MON_INTERV; |
4537 | } | |
4538 | ||
4539 | if (updelay < 0) { | |
a4aee5c8 JP |
4540 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4541 | updelay, INT_MAX); | |
1da177e4 LT |
4542 | updelay = 0; |
4543 | } | |
4544 | ||
4545 | if (downdelay < 0) { | |
a4aee5c8 JP |
4546 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4547 | downdelay, INT_MAX); | |
1da177e4 LT |
4548 | downdelay = 0; |
4549 | } | |
4550 | ||
4551 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4552 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4553 | use_carrier); | |
1da177e4 LT |
4554 | use_carrier = 1; |
4555 | } | |
4556 | ||
ad246c99 BH |
4557 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4558 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4559 | num_peer_notif); | |
4560 | num_peer_notif = 1; | |
4561 | } | |
4562 | ||
1da177e4 LT |
4563 | /* reset values for 802.3ad */ |
4564 | if (bond_mode == BOND_MODE_8023AD) { | |
4565 | if (!miimon) { | |
a4aee5c8 | 4566 | pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure, speed and duplex which are essential for 802.3ad operation\n"); |
3d632c3f | 4567 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4568 | miimon = 100; |
4569 | } | |
4570 | } | |
4571 | ||
bb1d9123 AG |
4572 | if (tx_queues < 1 || tx_queues > 255) { |
4573 | pr_warning("Warning: tx_queues (%d) should be between " | |
4574 | "1 and 255, resetting to %d\n", | |
4575 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4576 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4577 | } | |
4578 | ||
ebd8e497 AG |
4579 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4580 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4581 | "not of valid value (0/1), so it was set to " | |
4582 | "0\n", all_slaves_active); | |
4583 | all_slaves_active = 0; | |
4584 | } | |
4585 | ||
c2952c31 FL |
4586 | if (resend_igmp < 0 || resend_igmp > 255) { |
4587 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4588 | "0 and 255, resetting to %d\n", | |
4589 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4590 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4591 | } | |
4592 | ||
1da177e4 LT |
4593 | /* reset values for TLB/ALB */ |
4594 | if ((bond_mode == BOND_MODE_TLB) || | |
4595 | (bond_mode == BOND_MODE_ALB)) { | |
4596 | if (!miimon) { | |
a4aee5c8 | 4597 | pr_warning("Warning: miimon must be specified, otherwise bonding will not detect link failure and link speed which are essential for TLB/ALB load balancing\n"); |
3d632c3f | 4598 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4599 | miimon = 100; |
4600 | } | |
4601 | } | |
4602 | ||
4603 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4604 | 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", |
4605 | updelay); | |
1da177e4 LT |
4606 | } |
4607 | ||
4608 | if (!miimon) { | |
4609 | if (updelay || downdelay) { | |
4610 | /* just warn the user the up/down delay will have | |
4611 | * no effect since miimon is zero... | |
4612 | */ | |
a4aee5c8 JP |
4613 | 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", |
4614 | updelay, downdelay); | |
1da177e4 LT |
4615 | } |
4616 | } else { | |
4617 | /* don't allow arp monitoring */ | |
4618 | if (arp_interval) { | |
a4aee5c8 JP |
4619 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4620 | miimon, arp_interval); | |
1da177e4 LT |
4621 | arp_interval = 0; |
4622 | } | |
4623 | ||
4624 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4625 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4626 | updelay, miimon, | |
4627 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4628 | } |
4629 | ||
4630 | updelay /= miimon; | |
4631 | ||
4632 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4633 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4634 | downdelay, miimon, | |
4635 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4636 | } |
4637 | ||
4638 | downdelay /= miimon; | |
4639 | } | |
4640 | ||
4641 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4642 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4643 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4644 | arp_interval = BOND_LINK_ARP_INTERV; |
4645 | } | |
4646 | ||
4647 | for (arp_ip_count = 0; | |
4648 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4649 | arp_ip_count++) { | |
4650 | /* not complete check, but should be good enough to | |
4651 | catch mistakes */ | |
4652 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4653 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4654 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4655 | arp_interval = 0; |
4656 | } else { | |
d3bb52b0 | 4657 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4658 | arp_target[arp_ip_count] = ip; |
4659 | } | |
4660 | } | |
4661 | ||
4662 | if (arp_interval && !arp_ip_count) { | |
4663 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4664 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4665 | arp_interval); | |
1da177e4 LT |
4666 | arp_interval = 0; |
4667 | } | |
4668 | ||
f5b2b966 JV |
4669 | if (arp_validate) { |
4670 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4671 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4672 | return -EINVAL; |
4673 | } | |
4674 | if (!arp_interval) { | |
a4aee5c8 | 4675 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4676 | return -EINVAL; |
4677 | } | |
4678 | ||
4679 | arp_validate_value = bond_parse_parm(arp_validate, | |
4680 | arp_validate_tbl); | |
4681 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4682 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4683 | arp_validate == NULL ? "NULL" : arp_validate); |
4684 | return -EINVAL; | |
4685 | } | |
4686 | } else | |
4687 | arp_validate_value = 0; | |
4688 | ||
1da177e4 | 4689 | if (miimon) { |
a4aee5c8 | 4690 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4691 | } else if (arp_interval) { |
4692 | int i; | |
4693 | ||
a4aee5c8 JP |
4694 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4695 | arp_interval, | |
4696 | arp_validate_tbl[arp_validate_value].modename, | |
4697 | arp_ip_count); | |
1da177e4 LT |
4698 | |
4699 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4700 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4701 | |
e5e2a8fd | 4702 | pr_info("\n"); |
1da177e4 | 4703 | |
b8a9787e | 4704 | } else if (max_bonds) { |
1da177e4 LT |
4705 | /* miimon and arp_interval not set, we need one so things |
4706 | * work as expected, see bonding.txt for details | |
4707 | */ | |
b2730f4f | 4708 | pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n"); |
1da177e4 LT |
4709 | } |
4710 | ||
4711 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4712 | /* currently, using a primary only makes sense | |
4713 | * in active backup, TLB or ALB modes | |
4714 | */ | |
a4aee5c8 JP |
4715 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4716 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4717 | primary = NULL; |
4718 | } | |
4719 | ||
a549952a JP |
4720 | if (primary && primary_reselect) { |
4721 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4722 | pri_reselect_tbl); | |
4723 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4724 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4725 | primary_reselect == |
4726 | NULL ? "NULL" : primary_reselect); | |
4727 | return -EINVAL; | |
4728 | } | |
4729 | } else { | |
4730 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4731 | } | |
4732 | ||
3915c1e8 JV |
4733 | if (fail_over_mac) { |
4734 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4735 | fail_over_mac_tbl); | |
4736 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4737 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4738 | arp_validate == NULL ? "NULL" : arp_validate); |
4739 | return -EINVAL; | |
4740 | } | |
4741 | ||
4742 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4743 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4744 | } else { |
4745 | fail_over_mac_value = BOND_FOM_NONE; | |
4746 | } | |
dd957c57 | 4747 | |
1da177e4 LT |
4748 | /* fill params struct with the proper values */ |
4749 | params->mode = bond_mode; | |
169a3e66 | 4750 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4751 | params->miimon = miimon; |
ad246c99 | 4752 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4753 | params->arp_interval = arp_interval; |
f5b2b966 | 4754 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4755 | params->updelay = updelay; |
4756 | params->downdelay = downdelay; | |
4757 | params->use_carrier = use_carrier; | |
4758 | params->lacp_fast = lacp_fast; | |
4759 | params->primary[0] = 0; | |
a549952a | 4760 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4761 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4762 | params->tx_queues = tx_queues; |
ebd8e497 | 4763 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4764 | params->resend_igmp = resend_igmp; |
655f8919 | 4765 | params->min_links = min_links; |
1da177e4 LT |
4766 | |
4767 | if (primary) { | |
4768 | strncpy(params->primary, primary, IFNAMSIZ); | |
4769 | params->primary[IFNAMSIZ - 1] = 0; | |
4770 | } | |
4771 | ||
4772 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4773 | ||
4774 | return 0; | |
4775 | } | |
4776 | ||
0daa2303 | 4777 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4778 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4779 | |
e8a0464c DM |
4780 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4781 | struct netdev_queue *txq, | |
4782 | void *_unused) | |
c773e847 DM |
4783 | { |
4784 | lockdep_set_class(&txq->_xmit_lock, | |
4785 | &bonding_netdev_xmit_lock_key); | |
4786 | } | |
4787 | ||
4788 | static void bond_set_lockdep_class(struct net_device *dev) | |
4789 | { | |
cf508b12 DM |
4790 | lockdep_set_class(&dev->addr_list_lock, |
4791 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4792 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4793 | } |
4794 | ||
181470fc SH |
4795 | /* |
4796 | * Called from registration process | |
4797 | */ | |
4798 | static int bond_init(struct net_device *bond_dev) | |
4799 | { | |
4800 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4801 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4802 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4803 | |
4804 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4805 | ||
9fe0617d NH |
4806 | /* |
4807 | * Initialize locks that may be required during | |
4808 | * en/deslave operations. All of the bond_open work | |
4809 | * (of which this is part) should really be moved to | |
4810 | * a phase prior to dev_open | |
4811 | */ | |
4812 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4813 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4814 | ||
181470fc SH |
4815 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4816 | if (!bond->wq) | |
4817 | return -ENOMEM; | |
4818 | ||
4819 | bond_set_lockdep_class(bond_dev); | |
4820 | ||
181470fc | 4821 | bond_create_proc_entry(bond); |
ec87fd3b | 4822 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4823 | |
6151b3d4 | 4824 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4825 | |
f073c7ca TI |
4826 | bond_debug_register(bond); |
4827 | ||
22bedad3 | 4828 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4829 | return 0; |
4830 | } | |
4831 | ||
88ead977 EB |
4832 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4833 | { | |
4834 | if (tb[IFLA_ADDRESS]) { | |
4835 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4836 | return -EINVAL; | |
4837 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4838 | return -EADDRNOTAVAIL; | |
4839 | } | |
4840 | return 0; | |
4841 | } | |
4842 | ||
d5da4510 JP |
4843 | static int bond_get_tx_queues(struct net *net, struct nlattr *tb[], |
4844 | unsigned int *num_queues, | |
4845 | unsigned int *real_num_queues) | |
4846 | { | |
4847 | *num_queues = tx_queues; | |
4848 | return 0; | |
4849 | } | |
4850 | ||
88ead977 EB |
4851 | static struct rtnl_link_ops bond_link_ops __read_mostly = { |
4852 | .kind = "bond", | |
6639104b | 4853 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4854 | .setup = bond_setup, |
4855 | .validate = bond_validate, | |
d5da4510 | 4856 | .get_tx_queues = bond_get_tx_queues, |
88ead977 EB |
4857 | }; |
4858 | ||
dfe60397 | 4859 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4860 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4861 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4862 | * set up our sysfs entries. | |
4863 | */ | |
ec87fd3b | 4864 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4865 | { |
4866 | struct net_device *bond_dev; | |
4867 | int res; | |
4868 | ||
4869 | rtnl_lock(); | |
027ea041 | 4870 | |
1c5cae81 JP |
4871 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4872 | name ? name : "bond%d", | |
4873 | bond_setup, tx_queues); | |
dfe60397 | 4874 | if (!bond_dev) { |
a4aee5c8 | 4875 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4876 | rtnl_unlock(); |
4877 | return -ENOMEM; | |
dfe60397 MW |
4878 | } |
4879 | ||
ec87fd3b | 4880 | dev_net_set(bond_dev, net); |
88ead977 EB |
4881 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4882 | ||
dfe60397 | 4883 | res = register_netdevice(bond_dev); |
0daa2303 | 4884 | |
e826eafa PO |
4885 | netif_carrier_off(bond_dev); |
4886 | ||
7e083840 | 4887 | rtnl_unlock(); |
9e2e61fb AW |
4888 | if (res < 0) |
4889 | bond_destructor(bond_dev); | |
30c15ba9 | 4890 | return res; |
dfe60397 MW |
4891 | } |
4892 | ||
2c8c1e72 | 4893 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4894 | { |
15449745 | 4895 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4896 | |
4897 | bn->net = net; | |
4898 | INIT_LIST_HEAD(&bn->dev_list); | |
4899 | ||
ec87fd3b | 4900 | bond_create_proc_dir(bn); |
4c22400a | 4901 | bond_create_sysfs(bn); |
15449745 EB |
4902 | |
4903 | return 0; | |
ec87fd3b EB |
4904 | } |
4905 | ||
2c8c1e72 | 4906 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4907 | { |
15449745 | 4908 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b | 4909 | |
4c22400a | 4910 | bond_destroy_sysfs(bn); |
ec87fd3b | 4911 | bond_destroy_proc_dir(bn); |
ec87fd3b EB |
4912 | } |
4913 | ||
4914 | static struct pernet_operations bond_net_ops = { | |
4915 | .init = bond_net_init, | |
4916 | .exit = bond_net_exit, | |
15449745 EB |
4917 | .id = &bond_net_id, |
4918 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4919 | }; |
4920 | ||
1da177e4 LT |
4921 | static int __init bonding_init(void) |
4922 | { | |
1da177e4 LT |
4923 | int i; |
4924 | int res; | |
4925 | ||
bd33acc3 | 4926 | pr_info("%s", bond_version); |
1da177e4 | 4927 | |
dfe60397 | 4928 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4929 | if (res) |
dfe60397 | 4930 | goto out; |
1da177e4 | 4931 | |
15449745 | 4932 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4933 | if (res) |
4934 | goto out; | |
027ea041 | 4935 | |
88ead977 EB |
4936 | res = rtnl_link_register(&bond_link_ops); |
4937 | if (res) | |
6639104b | 4938 | goto err_link; |
88ead977 | 4939 | |
f073c7ca TI |
4940 | bond_create_debugfs(); |
4941 | ||
1da177e4 | 4942 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4943 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4944 | if (res) |
4945 | goto err; | |
1da177e4 LT |
4946 | } |
4947 | ||
1da177e4 | 4948 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4949 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
dfe60397 | 4950 | out: |
1da177e4 | 4951 | return res; |
88ead977 EB |
4952 | err: |
4953 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4954 | err_link: |
15449745 | 4955 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4956 | goto out; |
dfe60397 | 4957 | |
1da177e4 LT |
4958 | } |
4959 | ||
4960 | static void __exit bonding_exit(void) | |
4961 | { | |
4962 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4963 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4964 | |
f073c7ca | 4965 | bond_destroy_debugfs(); |
ae68c398 | 4966 | |
88ead977 | 4967 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 4968 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4969 | |
4970 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4971 | /* |
4972 | * Make sure we don't have an imbalance on our netpoll blocking | |
4973 | */ | |
4974 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4975 | #endif |
1da177e4 LT |
4976 | } |
4977 | ||
4978 | module_init(bonding_init); | |
4979 | module_exit(bonding_exit); | |
4980 | MODULE_LICENSE("GPL"); | |
4981 | MODULE_VERSION(DRV_VERSION); | |
4982 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4983 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 4984 | MODULE_ALIAS_RTNL_LINK("bond"); |