]>
Commit | Line | Data |
---|---|---|
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/dma.h> |
3d632c3f | 58 | #include <linux/uaccess.h> |
1da177e4 LT |
59 | #include <linux/errno.h> |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/inetdevice.h> | |
a816c7c7 | 62 | #include <linux/igmp.h> |
1da177e4 LT |
63 | #include <linux/etherdevice.h> |
64 | #include <linux/skbuff.h> | |
65 | #include <net/sock.h> | |
66 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
67 | #include <linux/smp.h> |
68 | #include <linux/if_ether.h> | |
69 | #include <net/arp.h> | |
70 | #include <linux/mii.h> | |
71 | #include <linux/ethtool.h> | |
72 | #include <linux/if_vlan.h> | |
73 | #include <linux/if_bonding.h> | |
b63bb739 | 74 | #include <linux/jiffies.h> |
e843fa50 | 75 | #include <linux/preempt.h> |
c3ade5ca | 76 | #include <net/route.h> |
457c4cbc | 77 | #include <net/net_namespace.h> |
ec87fd3b | 78 | #include <net/netns/generic.h> |
5ee31c68 | 79 | #include <net/pkt_sched.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 | ||
385 | /** | |
386 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 387 | * |
1da177e4 LT |
388 | * @bond: bond device that got this skb for tx. |
389 | * @skb: hw accel VLAN tagged skb to transmit | |
390 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 391 | */ |
3d632c3f SH |
392 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
393 | struct net_device *slave_dev) | |
1da177e4 | 394 | { |
8387451e | 395 | skb->dev = slave_dev; |
374eeb5a | 396 | |
5ee31c68 | 397 | BUILD_BUG_ON(sizeof(skb->queue_mapping) != |
df4ab5b3 JP |
398 | sizeof(qdisc_skb_cb(skb)->slave_dev_queue_mapping)); |
399 | skb->queue_mapping = qdisc_skb_cb(skb)->slave_dev_queue_mapping; | |
374eeb5a | 400 | |
e15c3c22 | 401 | if (unlikely(netpoll_tx_running(bond->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 | */ | |
80d5c368 PM |
431 | static int bond_vlan_rx_add_vid(struct net_device *bond_dev, |
432 | __be16 proto, u16 vid) | |
1da177e4 | 433 | { |
454d7c9b | 434 | struct bonding *bond = netdev_priv(bond_dev); |
87002b03 | 435 | struct slave *slave, *stop_at; |
1da177e4 LT |
436 | int i, res; |
437 | ||
438 | bond_for_each_slave(bond, slave, i) { | |
80d5c368 | 439 | res = vlan_vid_add(slave->dev, proto, vid); |
87002b03 JP |
440 | if (res) |
441 | goto unwind; | |
1da177e4 LT |
442 | } |
443 | ||
444 | res = bond_add_vlan(bond, vid); | |
445 | if (res) { | |
a4aee5c8 | 446 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 | 447 | bond_dev->name, vid); |
8e586137 | 448 | return res; |
1da177e4 | 449 | } |
8e586137 JP |
450 | |
451 | return 0; | |
87002b03 JP |
452 | |
453 | unwind: | |
454 | /* unwind from head to the slave that failed */ | |
455 | stop_at = slave; | |
456 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) | |
80d5c368 | 457 | vlan_vid_del(slave->dev, proto, vid); |
87002b03 JP |
458 | |
459 | return res; | |
1da177e4 LT |
460 | } |
461 | ||
462 | /** | |
463 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
464 | * @bond_dev: bonding net device that got called | |
465 | * @vid: vlan id being removed | |
466 | */ | |
80d5c368 PM |
467 | static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, |
468 | __be16 proto, u16 vid) | |
1da177e4 | 469 | { |
454d7c9b | 470 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 471 | struct slave *slave; |
1da177e4 LT |
472 | int i, res; |
473 | ||
87002b03 | 474 | bond_for_each_slave(bond, slave, i) |
80d5c368 | 475 | vlan_vid_del(slave->dev, proto, vid); |
1da177e4 LT |
476 | |
477 | res = bond_del_vlan(bond, vid); | |
478 | if (res) { | |
a4aee5c8 | 479 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 | 480 | bond_dev->name, vid); |
8e586137 | 481 | return res; |
1da177e4 | 482 | } |
8e586137 JP |
483 | |
484 | return 0; | |
1da177e4 LT |
485 | } |
486 | ||
487 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
488 | { | |
489 | struct vlan_entry *vlan; | |
87002b03 | 490 | int res; |
1da177e4 | 491 | |
87002b03 | 492 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
80d5c368 PM |
493 | res = vlan_vid_add(slave_dev, htons(ETH_P_8021Q), |
494 | vlan->vlan_id); | |
87002b03 JP |
495 | if (res) |
496 | pr_warning("%s: Failed to add vlan id %d to device %s\n", | |
497 | bond->dev->name, vlan->vlan_id, | |
498 | slave_dev->name); | |
499 | } | |
1da177e4 LT |
500 | } |
501 | ||
3d632c3f SH |
502 | static void bond_del_vlans_from_slave(struct bonding *bond, |
503 | struct net_device *slave_dev) | |
1da177e4 LT |
504 | { |
505 | struct vlan_entry *vlan; | |
1da177e4 | 506 | |
1da177e4 | 507 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
508 | if (!vlan->vlan_id) |
509 | continue; | |
80d5c368 | 510 | vlan_vid_del(slave_dev, htons(ETH_P_8021Q), vlan->vlan_id); |
1da177e4 | 511 | } |
1da177e4 LT |
512 | } |
513 | ||
514 | /*------------------------------- Link status -------------------------------*/ | |
515 | ||
ff59c456 JV |
516 | /* |
517 | * Set the carrier state for the master according to the state of its | |
518 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
519 | * do special 802.3ad magic. | |
520 | * | |
521 | * Returns zero if carrier state does not change, nonzero if it does. | |
522 | */ | |
523 | static int bond_set_carrier(struct bonding *bond) | |
524 | { | |
525 | struct slave *slave; | |
526 | int i; | |
527 | ||
528 | if (bond->slave_cnt == 0) | |
529 | goto down; | |
530 | ||
531 | if (bond->params.mode == BOND_MODE_8023AD) | |
532 | return bond_3ad_set_carrier(bond); | |
533 | ||
534 | bond_for_each_slave(bond, slave, i) { | |
535 | if (slave->link == BOND_LINK_UP) { | |
536 | if (!netif_carrier_ok(bond->dev)) { | |
537 | netif_carrier_on(bond->dev); | |
538 | return 1; | |
539 | } | |
540 | return 0; | |
541 | } | |
542 | } | |
543 | ||
544 | down: | |
545 | if (netif_carrier_ok(bond->dev)) { | |
546 | netif_carrier_off(bond->dev); | |
547 | return 1; | |
548 | } | |
549 | return 0; | |
550 | } | |
551 | ||
1da177e4 LT |
552 | /* |
553 | * Get link speed and duplex from the slave's base driver | |
554 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 555 | * values are invalid, set speed and duplex to -1, |
13b95fb7 | 556 | * and return. |
1da177e4 | 557 | */ |
13b95fb7 | 558 | static void bond_update_speed_duplex(struct slave *slave) |
1da177e4 LT |
559 | { |
560 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 561 | struct ethtool_cmd ecmd; |
5d30530e | 562 | u32 slave_speed; |
61a44b9c | 563 | int res; |
1da177e4 | 564 | |
589665f5 DC |
565 | slave->speed = SPEED_UNKNOWN; |
566 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 567 | |
4bc71cb9 | 568 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 569 | if (res < 0) |
13b95fb7 | 570 | return; |
1da177e4 | 571 | |
4bc71cb9 | 572 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 573 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
13b95fb7 | 574 | return; |
1da177e4 | 575 | |
4bc71cb9 | 576 | switch (ecmd.duplex) { |
1da177e4 LT |
577 | case DUPLEX_FULL: |
578 | case DUPLEX_HALF: | |
579 | break; | |
580 | default: | |
13b95fb7 | 581 | return; |
1da177e4 LT |
582 | } |
583 | ||
5d30530e | 584 | slave->speed = slave_speed; |
4bc71cb9 | 585 | slave->duplex = ecmd.duplex; |
1da177e4 | 586 | |
13b95fb7 | 587 | return; |
1da177e4 LT |
588 | } |
589 | ||
590 | /* | |
591 | * if <dev> supports MII link status reporting, check its link status. | |
592 | * | |
593 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 594 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
595 | * |
596 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
597 | * can't tell and just pretend it is), or 0, meaning that the link is | |
598 | * down. | |
599 | * | |
600 | * If reporting is non-zero, instead of faking link up, return -1 if | |
601 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
602 | * support them). If use_carrier is set, return whatever it says. | |
603 | * It'd be nice if there was a good way to tell if a driver supports | |
604 | * netif_carrier, but there really isn't. | |
605 | */ | |
3d632c3f SH |
606 | static int bond_check_dev_link(struct bonding *bond, |
607 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 608 | { |
eb7cc59a | 609 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 610 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
611 | struct ifreq ifr; |
612 | struct mii_ioctl_data *mii; | |
1da177e4 | 613 | |
6c988853 PG |
614 | if (!reporting && !netif_running(slave_dev)) |
615 | return 0; | |
616 | ||
eb7cc59a | 617 | if (bond->params.use_carrier) |
1da177e4 | 618 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 619 | |
29112f4e | 620 | /* Try to get link status using Ethtool first. */ |
c772dde3 BH |
621 | if (slave_dev->ethtool_ops->get_link) |
622 | return slave_dev->ethtool_ops->get_link(slave_dev) ? | |
623 | BMSR_LSTATUS : 0; | |
29112f4e | 624 | |
3d632c3f | 625 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 626 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
627 | if (ioctl) { |
628 | /* TODO: set pointer to correct ioctl on a per team member */ | |
629 | /* bases to make this more efficient. that is, once */ | |
630 | /* we determine the correct ioctl, we will always */ | |
631 | /* call it and not the others for that team */ | |
632 | /* member. */ | |
633 | ||
634 | /* | |
635 | * We cannot assume that SIOCGMIIPHY will also read a | |
636 | * register; not all network drivers (e.g., e100) | |
637 | * support that. | |
638 | */ | |
639 | ||
640 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
641 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
642 | mii = if_mii(&ifr); | |
643 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
644 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
645 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
646 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
647 | } |
648 | } | |
649 | ||
1da177e4 LT |
650 | /* |
651 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 652 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
653 | * cannot report link status). If not reporting, pretend |
654 | * we're ok. | |
655 | */ | |
3d632c3f | 656 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
657 | } |
658 | ||
659 | /*----------------------------- Multicast list ------------------------------*/ | |
660 | ||
1da177e4 LT |
661 | /* |
662 | * Push the promiscuity flag down to appropriate slaves | |
663 | */ | |
7e1a1ac1 | 664 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 665 | { |
7e1a1ac1 | 666 | int err = 0; |
1da177e4 LT |
667 | if (USES_PRIMARY(bond->params.mode)) { |
668 | /* write lock already acquired */ | |
669 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
670 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
671 | inc); | |
1da177e4 LT |
672 | } |
673 | } else { | |
674 | struct slave *slave; | |
675 | int i; | |
676 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
677 | err = dev_set_promiscuity(slave->dev, inc); |
678 | if (err) | |
679 | return err; | |
1da177e4 LT |
680 | } |
681 | } | |
7e1a1ac1 | 682 | return err; |
1da177e4 LT |
683 | } |
684 | ||
685 | /* | |
686 | * Push the allmulti flag down to all slaves | |
687 | */ | |
7e1a1ac1 | 688 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 689 | { |
7e1a1ac1 | 690 | int err = 0; |
1da177e4 LT |
691 | if (USES_PRIMARY(bond->params.mode)) { |
692 | /* write lock already acquired */ | |
693 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
694 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
695 | inc); | |
1da177e4 LT |
696 | } |
697 | } else { | |
698 | struct slave *slave; | |
699 | int i; | |
700 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
701 | err = dev_set_allmulti(slave->dev, inc); |
702 | if (err) | |
703 | return err; | |
1da177e4 LT |
704 | } |
705 | } | |
7e1a1ac1 | 706 | return err; |
1da177e4 LT |
707 | } |
708 | ||
709 | /* | |
710 | * Add a Multicast address to slaves | |
711 | * according to mode | |
712 | */ | |
22bedad3 | 713 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
714 | { |
715 | if (USES_PRIMARY(bond->params.mode)) { | |
716 | /* write lock already acquired */ | |
3d632c3f | 717 | if (bond->curr_active_slave) |
22bedad3 | 718 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
719 | } else { |
720 | struct slave *slave; | |
721 | int i; | |
3d632c3f SH |
722 | |
723 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 724 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
725 | } |
726 | } | |
727 | ||
728 | /* | |
729 | * Remove a multicast address from slave | |
730 | * according to mode | |
731 | */ | |
22bedad3 | 732 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
733 | { |
734 | if (USES_PRIMARY(bond->params.mode)) { | |
735 | /* write lock already acquired */ | |
3d632c3f | 736 | if (bond->curr_active_slave) |
22bedad3 | 737 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
738 | } else { |
739 | struct slave *slave; | |
740 | int i; | |
741 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 742 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
743 | } |
744 | } | |
745 | } | |
746 | ||
a816c7c7 | 747 | |
5a37e8ca | 748 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
749 | { |
750 | struct in_device *in_dev; | |
a816c7c7 | 751 | |
5a37e8ca | 752 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 753 | if (in_dev) |
24912420 | 754 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
755 | } |
756 | ||
5a37e8ca FL |
757 | /* |
758 | * Retrieve the list of registered multicast addresses for the bonding | |
759 | * device and retransmit an IGMP JOIN request to the current active | |
760 | * slave. | |
761 | */ | |
762 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
763 | { | |
471cb5a3 | 764 | struct net_device *bond_dev, *vlan_dev, *upper_dev; |
5a37e8ca FL |
765 | struct vlan_entry *vlan; |
766 | ||
471cb5a3 | 767 | rcu_read_lock(); |
5a37e8ca FL |
768 | read_lock(&bond->lock); |
769 | ||
1c3ac428 PP |
770 | bond_dev = bond->dev; |
771 | ||
5a37e8ca | 772 | /* rejoin all groups on bond device */ |
1c3ac428 PP |
773 | __bond_resend_igmp_join_requests(bond_dev); |
774 | ||
775 | /* | |
776 | * if bond is enslaved to a bridge, | |
777 | * then rejoin all groups on its master | |
778 | */ | |
471cb5a3 JP |
779 | upper_dev = netdev_master_upper_dev_get_rcu(bond_dev); |
780 | if (upper_dev && upper_dev->priv_flags & IFF_EBRIDGE) | |
781 | __bond_resend_igmp_join_requests(upper_dev); | |
5a37e8ca FL |
782 | |
783 | /* rejoin all groups on vlan devices */ | |
cc0e4070 | 784 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1fd9b1fc | 785 | vlan_dev = __vlan_find_dev_deep(bond_dev, htons(ETH_P_8021Q), |
cc0e4070 | 786 | vlan->vlan_id); |
cc0e4070 JP |
787 | if (vlan_dev) |
788 | __bond_resend_igmp_join_requests(vlan_dev); | |
5a37e8ca FL |
789 | } |
790 | ||
e6d265e8 | 791 | if (--bond->igmp_retrans > 0) |
c2952c31 | 792 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
e6d265e8 | 793 | |
5a37e8ca | 794 | read_unlock(&bond->lock); |
471cb5a3 | 795 | rcu_read_unlock(); |
5a37e8ca FL |
796 | } |
797 | ||
379b7383 | 798 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
799 | { |
800 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 801 | mcast_work.work); |
ad999eee | 802 | |
5a37e8ca FL |
803 | bond_resend_igmp_join_requests(bond); |
804 | } | |
805 | ||
1da177e4 LT |
806 | /* |
807 | * flush all members of flush->mc_list from device dev->mc_list | |
808 | */ | |
3d632c3f SH |
809 | static void bond_mc_list_flush(struct net_device *bond_dev, |
810 | struct net_device *slave_dev) | |
1da177e4 | 811 | { |
454d7c9b | 812 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 813 | struct netdev_hw_addr *ha; |
1da177e4 | 814 | |
22bedad3 JP |
815 | netdev_for_each_mc_addr(ha, bond_dev) |
816 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
817 | |
818 | if (bond->params.mode == BOND_MODE_8023AD) { | |
819 | /* del lacpdu mc addr from mc list */ | |
820 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
821 | ||
22bedad3 | 822 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
823 | } |
824 | } | |
825 | ||
826 | /*--------------------------- Active slave change ---------------------------*/ | |
827 | ||
828 | /* | |
829 | * Update the mc list and multicast-related flags for the new and | |
830 | * old active slaves (if any) according to the multicast mode, and | |
831 | * promiscuous flags unconditionally. | |
832 | */ | |
3d632c3f SH |
833 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
834 | struct slave *old_active) | |
1da177e4 | 835 | { |
22bedad3 | 836 | struct netdev_hw_addr *ha; |
1da177e4 | 837 | |
3d632c3f | 838 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
839 | /* nothing to do - mc list is already up-to-date on |
840 | * all slaves | |
841 | */ | |
842 | return; | |
1da177e4 LT |
843 | |
844 | if (old_active) { | |
3d632c3f | 845 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 846 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 847 | |
3d632c3f | 848 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 849 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 850 | |
d632ce98 | 851 | netif_addr_lock_bh(bond->dev); |
22bedad3 JP |
852 | netdev_for_each_mc_addr(ha, bond->dev) |
853 | dev_mc_del(old_active->dev, ha->addr); | |
d632ce98 | 854 | netif_addr_unlock_bh(bond->dev); |
1da177e4 LT |
855 | } |
856 | ||
857 | if (new_active) { | |
7e1a1ac1 | 858 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 859 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 860 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 861 | |
3d632c3f | 862 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 863 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 864 | |
d632ce98 | 865 | netif_addr_lock_bh(bond->dev); |
22bedad3 JP |
866 | netdev_for_each_mc_addr(ha, bond->dev) |
867 | dev_mc_add(new_active->dev, ha->addr); | |
d632ce98 | 868 | netif_addr_unlock_bh(bond->dev); |
1da177e4 LT |
869 | } |
870 | } | |
871 | ||
3915c1e8 JV |
872 | /* |
873 | * bond_do_fail_over_mac | |
874 | * | |
875 | * Perform special MAC address swapping for fail_over_mac settings | |
876 | * | |
877 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
878 | */ | |
879 | static void bond_do_fail_over_mac(struct bonding *bond, | |
880 | struct slave *new_active, | |
881 | struct slave *old_active) | |
1f78d9f9 HE |
882 | __releases(&bond->curr_slave_lock) |
883 | __releases(&bond->lock) | |
884 | __acquires(&bond->lock) | |
885 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
886 | { |
887 | u8 tmp_mac[ETH_ALEN]; | |
888 | struct sockaddr saddr; | |
889 | int rv; | |
890 | ||
891 | switch (bond->params.fail_over_mac) { | |
892 | case BOND_FOM_ACTIVE: | |
7d26bb10 | 893 | if (new_active) { |
3915c1e8 JV |
894 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, |
895 | new_active->dev->addr_len); | |
7d26bb10 WP |
896 | write_unlock_bh(&bond->curr_slave_lock); |
897 | read_unlock(&bond->lock); | |
898 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); | |
899 | read_lock(&bond->lock); | |
900 | write_lock_bh(&bond->curr_slave_lock); | |
901 | } | |
3915c1e8 JV |
902 | break; |
903 | case BOND_FOM_FOLLOW: | |
904 | /* | |
905 | * if new_active && old_active, swap them | |
906 | * if just old_active, do nothing (going to no active slave) | |
907 | * if just new_active, set new_active to bond's MAC | |
908 | */ | |
909 | if (!new_active) | |
910 | return; | |
911 | ||
912 | write_unlock_bh(&bond->curr_slave_lock); | |
913 | read_unlock(&bond->lock); | |
914 | ||
915 | if (old_active) { | |
916 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
917 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
918 | ETH_ALEN); | |
919 | saddr.sa_family = new_active->dev->type; | |
920 | } else { | |
921 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
922 | saddr.sa_family = bond->dev->type; | |
923 | } | |
924 | ||
925 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
926 | if (rv) { | |
a4aee5c8 | 927 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
928 | bond->dev->name, -rv, new_active->dev->name); |
929 | goto out; | |
930 | } | |
931 | ||
932 | if (!old_active) | |
933 | goto out; | |
934 | ||
935 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
936 | saddr.sa_family = old_active->dev->type; | |
937 | ||
938 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
939 | if (rv) | |
a4aee5c8 | 940 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
941 | bond->dev->name, -rv, new_active->dev->name); |
942 | out: | |
943 | read_lock(&bond->lock); | |
944 | write_lock_bh(&bond->curr_slave_lock); | |
945 | break; | |
946 | default: | |
a4aee5c8 | 947 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
948 | bond->dev->name, bond->params.fail_over_mac); |
949 | break; | |
950 | } | |
951 | ||
952 | } | |
953 | ||
a549952a JP |
954 | static bool bond_should_change_active(struct bonding *bond) |
955 | { | |
956 | struct slave *prim = bond->primary_slave; | |
957 | struct slave *curr = bond->curr_active_slave; | |
958 | ||
959 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
960 | return true; | |
961 | if (bond->force_primary) { | |
962 | bond->force_primary = false; | |
963 | return true; | |
964 | } | |
965 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
966 | (prim->speed < curr->speed || | |
967 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
968 | return false; | |
969 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
970 | return false; | |
971 | return true; | |
972 | } | |
3915c1e8 | 973 | |
1da177e4 LT |
974 | /** |
975 | * find_best_interface - select the best available slave to be the active one | |
976 | * @bond: our bonding struct | |
977 | * | |
978 | * Warning: Caller must hold curr_slave_lock for writing. | |
979 | */ | |
980 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
981 | { | |
982 | struct slave *new_active, *old_active; | |
983 | struct slave *bestslave = NULL; | |
984 | int mintime = bond->params.updelay; | |
985 | int i; | |
986 | ||
49b4ad92 | 987 | new_active = bond->curr_active_slave; |
1da177e4 LT |
988 | |
989 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 990 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 991 | new_active = bond->first_slave; |
3d632c3f | 992 | else |
1da177e4 | 993 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
994 | } |
995 | ||
1da177e4 | 996 | if ((bond->primary_slave) && |
a549952a JP |
997 | bond->primary_slave->link == BOND_LINK_UP && |
998 | bond_should_change_active(bond)) { | |
1da177e4 LT |
999 | new_active = bond->primary_slave; |
1000 | } | |
1001 | ||
1002 | /* remember where to stop iterating over the slaves */ | |
1003 | old_active = new_active; | |
1004 | ||
1005 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1006 | if (new_active->link == BOND_LINK_UP) { |
1007 | return new_active; | |
1008 | } else if (new_active->link == BOND_LINK_BACK && | |
1009 | IS_UP(new_active->dev)) { | |
1010 | /* link up, but waiting for stabilization */ | |
1011 | if (new_active->delay < mintime) { | |
1012 | mintime = new_active->delay; | |
1013 | bestslave = new_active; | |
1da177e4 LT |
1014 | } |
1015 | } | |
1016 | } | |
1017 | ||
1018 | return bestslave; | |
1019 | } | |
1020 | ||
ad246c99 BH |
1021 | static bool bond_should_notify_peers(struct bonding *bond) |
1022 | { | |
1023 | struct slave *slave = bond->curr_active_slave; | |
1024 | ||
1025 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1026 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1027 | ||
1028 | if (!slave || !bond->send_peer_notif || | |
1029 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1030 | return false; | |
1031 | ||
1032 | bond->send_peer_notif--; | |
1033 | return true; | |
1034 | } | |
1035 | ||
1da177e4 LT |
1036 | /** |
1037 | * change_active_interface - change the active slave into the specified one | |
1038 | * @bond: our bonding struct | |
1039 | * @new: the new slave to make the active one | |
1040 | * | |
1041 | * Set the new slave to the bond's settings and unset them on the old | |
1042 | * curr_active_slave. | |
1043 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1044 | * | |
1045 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1046 | * because it is apparently the best available slave we have, even though its | |
1047 | * updelay hasn't timed out yet. | |
1048 | * | |
3915c1e8 JV |
1049 | * If new_active is not NULL, caller must hold bond->lock for read and |
1050 | * curr_slave_lock for write_bh. | |
1da177e4 | 1051 | */ |
a77b5325 | 1052 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1053 | { |
1054 | struct slave *old_active = bond->curr_active_slave; | |
1055 | ||
3d632c3f | 1056 | if (old_active == new_active) |
1da177e4 | 1057 | return; |
1da177e4 LT |
1058 | |
1059 | if (new_active) { | |
b2220cad JV |
1060 | new_active->jiffies = jiffies; |
1061 | ||
1da177e4 LT |
1062 | if (new_active->link == BOND_LINK_BACK) { |
1063 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1064 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1065 | bond->dev->name, new_active->dev->name, | |
1066 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1067 | } |
1068 | ||
1069 | new_active->delay = 0; | |
1070 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1071 | |
3d632c3f | 1072 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1073 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1074 | |
58402054 | 1075 | if (bond_is_lb(bond)) |
1da177e4 | 1076 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1077 | } else { |
1078 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1079 | pr_info("%s: making interface %s the new active one.\n", |
1080 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1081 | } |
1082 | } | |
1083 | } | |
1084 | ||
3d632c3f | 1085 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1086 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1087 | |
58402054 | 1088 | if (bond_is_lb(bond)) { |
1da177e4 | 1089 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1090 | if (old_active) |
1091 | bond_set_slave_inactive_flags(old_active); | |
1092 | if (new_active) | |
1093 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1094 | } else { |
1095 | bond->curr_active_slave = new_active; | |
1096 | } | |
c3ade5ca JV |
1097 | |
1098 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1099 | if (old_active) |
c3ade5ca | 1100 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1101 | |
1102 | if (new_active) { | |
ad246c99 BH |
1103 | bool should_notify_peers = false; |
1104 | ||
c3ade5ca | 1105 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1106 | |
709f8a45 OG |
1107 | if (bond->params.fail_over_mac) |
1108 | bond_do_fail_over_mac(bond, new_active, | |
1109 | old_active); | |
3915c1e8 | 1110 | |
ad246c99 BH |
1111 | if (netif_running(bond->dev)) { |
1112 | bond->send_peer_notif = | |
1113 | bond->params.num_peer_notif; | |
1114 | should_notify_peers = | |
1115 | bond_should_notify_peers(bond); | |
1116 | } | |
1117 | ||
01f3109d OG |
1118 | write_unlock_bh(&bond->curr_slave_lock); |
1119 | read_unlock(&bond->lock); | |
1120 | ||
b7bc2a5b | 1121 | call_netdevice_notifiers(NETDEV_BONDING_FAILOVER, bond->dev); |
ad246c99 | 1122 | if (should_notify_peers) |
b7bc2a5b AW |
1123 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, |
1124 | bond->dev); | |
01f3109d OG |
1125 | |
1126 | read_lock(&bond->lock); | |
1127 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1128 | } |
c3ade5ca | 1129 | } |
a2fd940f | 1130 | |
5a37e8ca | 1131 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1132 | * all were sent on curr_active_slave. |
1133 | * resend only if bond is brought up with the affected | |
1134 | * bonding modes and the retransmission is enabled */ | |
1135 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1136 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1137 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1138 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1139 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1140 | } |
1da177e4 LT |
1141 | } |
1142 | ||
1143 | /** | |
1144 | * bond_select_active_slave - select a new active slave, if needed | |
1145 | * @bond: our bonding struct | |
1146 | * | |
3d632c3f | 1147 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1148 | * - The old curr_active_slave has been released or lost its link. |
1149 | * - The primary_slave has got its link back. | |
1150 | * - A slave has got its link back and there's no old curr_active_slave. | |
1151 | * | |
3915c1e8 | 1152 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1153 | */ |
a77b5325 | 1154 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1155 | { |
1156 | struct slave *best_slave; | |
ff59c456 | 1157 | int rv; |
1da177e4 LT |
1158 | |
1159 | best_slave = bond_find_best_slave(bond); | |
1160 | if (best_slave != bond->curr_active_slave) { | |
1161 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1162 | rv = bond_set_carrier(bond); |
1163 | if (!rv) | |
1164 | return; | |
1165 | ||
1166 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1167 | pr_info("%s: first active interface up!\n", |
1168 | bond->dev->name); | |
ff59c456 | 1169 | } else { |
a4aee5c8 JP |
1170 | pr_info("%s: now running without any active interface !\n", |
1171 | bond->dev->name); | |
ff59c456 | 1172 | } |
1da177e4 LT |
1173 | } |
1174 | } | |
1175 | ||
1176 | /*--------------------------- slave list handling ---------------------------*/ | |
1177 | ||
1178 | /* | |
1179 | * This function attaches the slave to the end of list. | |
1180 | * | |
1181 | * bond->lock held for writing by caller. | |
1182 | */ | |
1183 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1184 | { | |
1185 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1186 | new_slave->next = new_slave; | |
1187 | new_slave->prev = new_slave; | |
1188 | bond->first_slave = new_slave; | |
1189 | } else { | |
1190 | new_slave->next = bond->first_slave; | |
1191 | new_slave->prev = bond->first_slave->prev; | |
1192 | new_slave->next->prev = new_slave; | |
1193 | new_slave->prev->next = new_slave; | |
1194 | } | |
1195 | ||
1196 | bond->slave_cnt++; | |
1197 | } | |
1198 | ||
1199 | /* | |
1200 | * This function detaches the slave from the list. | |
1201 | * WARNING: no check is made to verify if the slave effectively | |
1202 | * belongs to <bond>. | |
1203 | * Nothing is freed on return, structures are just unchained. | |
1204 | * If any slave pointer in bond was pointing to <slave>, | |
1205 | * it should be changed by the calling function. | |
1206 | * | |
1207 | * bond->lock held for writing by caller. | |
1208 | */ | |
1209 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1210 | { | |
3d632c3f | 1211 | if (slave->next) |
1da177e4 | 1212 | slave->next->prev = slave->prev; |
1da177e4 | 1213 | |
3d632c3f | 1214 | if (slave->prev) |
1da177e4 | 1215 | slave->prev->next = slave->next; |
1da177e4 LT |
1216 | |
1217 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1218 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1219 | bond->first_slave = slave->next; | |
1220 | } else { | |
1221 | bond->first_slave = NULL; /* slave was the last one */ | |
1222 | } | |
1223 | } | |
1224 | ||
1225 | slave->next = NULL; | |
1226 | slave->prev = NULL; | |
1227 | bond->slave_cnt--; | |
1228 | } | |
1229 | ||
f6dc31a8 | 1230 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1231 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1232 | { |
8a8efa22 AW |
1233 | struct netpoll *np; |
1234 | int err = 0; | |
f6dc31a8 | 1235 | |
47be03a2 | 1236 | np = kzalloc(sizeof(*np), GFP_ATOMIC); |
8a8efa22 AW |
1237 | err = -ENOMEM; |
1238 | if (!np) | |
1239 | goto out; | |
1240 | ||
47be03a2 | 1241 | err = __netpoll_setup(np, slave->dev, GFP_ATOMIC); |
8a8efa22 AW |
1242 | if (err) { |
1243 | kfree(np); | |
1244 | goto out; | |
f6dc31a8 | 1245 | } |
8a8efa22 AW |
1246 | slave->np = np; |
1247 | out: | |
1248 | return err; | |
1249 | } | |
1250 | static inline void slave_disable_netpoll(struct slave *slave) | |
1251 | { | |
1252 | struct netpoll *np = slave->np; | |
1253 | ||
1254 | if (!np) | |
1255 | return; | |
1256 | ||
1257 | slave->np = NULL; | |
2cde6acd | 1258 | __netpoll_free_async(np); |
8a8efa22 AW |
1259 | } |
1260 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1261 | { | |
1262 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1263 | return false; | |
1264 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1265 | return false; | |
1266 | return true; | |
f6dc31a8 WC |
1267 | } |
1268 | ||
1269 | static void bond_poll_controller(struct net_device *bond_dev) | |
1270 | { | |
8a8efa22 AW |
1271 | } |
1272 | ||
1273 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1274 | { | |
c2355e1a NH |
1275 | struct slave *slave; |
1276 | int i; | |
1277 | ||
8a8efa22 AW |
1278 | bond_for_each_slave(bond, slave, i) |
1279 | if (IS_UP(slave->dev)) | |
1280 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1281 | } |
f6dc31a8 WC |
1282 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1283 | { | |
1284 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1285 | |
1286 | read_lock(&bond->lock); | |
1287 | __bond_netpoll_cleanup(bond); | |
1288 | read_unlock(&bond->lock); | |
1289 | } | |
1290 | ||
47be03a2 | 1291 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni, gfp_t gfp) |
8a8efa22 AW |
1292 | { |
1293 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1294 | struct slave *slave; |
8a8efa22 | 1295 | int i, err = 0; |
f6dc31a8 WC |
1296 | |
1297 | read_lock(&bond->lock); | |
f6dc31a8 | 1298 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1299 | err = slave_enable_netpoll(slave); |
1300 | if (err) { | |
1301 | __bond_netpoll_cleanup(bond); | |
1302 | break; | |
f6dc31a8 WC |
1303 | } |
1304 | } | |
1305 | read_unlock(&bond->lock); | |
8a8efa22 | 1306 | return err; |
f6dc31a8 WC |
1307 | } |
1308 | ||
8a8efa22 AW |
1309 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1310 | { | |
1311 | return bond->dev->npinfo; | |
1312 | } | |
f6dc31a8 | 1313 | |
8a8efa22 AW |
1314 | #else |
1315 | static inline int slave_enable_netpoll(struct slave *slave) | |
1316 | { | |
1317 | return 0; | |
1318 | } | |
1319 | static inline void slave_disable_netpoll(struct slave *slave) | |
1320 | { | |
1321 | } | |
f6dc31a8 WC |
1322 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1323 | { | |
1324 | } | |
f6dc31a8 WC |
1325 | #endif |
1326 | ||
1da177e4 LT |
1327 | /*---------------------------------- IOCTL ----------------------------------*/ |
1328 | ||
409cc1f8 JP |
1329 | static void bond_set_dev_addr(struct net_device *bond_dev, |
1330 | struct net_device *slave_dev) | |
1da177e4 | 1331 | { |
5a03cdb7 HE |
1332 | pr_debug("bond_dev=%p\n", bond_dev); |
1333 | pr_debug("slave_dev=%p\n", slave_dev); | |
1334 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 | 1335 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
409cc1f8 JP |
1336 | bond_dev->addr_assign_type = NET_ADDR_SET; |
1337 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond_dev); | |
1da177e4 LT |
1338 | } |
1339 | ||
c8f44aff MM |
1340 | static netdev_features_t bond_fix_features(struct net_device *dev, |
1341 | netdev_features_t features) | |
8531c5ff | 1342 | { |
8531c5ff | 1343 | struct slave *slave; |
b2a103e6 | 1344 | struct bonding *bond = netdev_priv(dev); |
c8f44aff | 1345 | netdev_features_t mask; |
8e3babcd | 1346 | int i; |
8531c5ff | 1347 | |
b2a103e6 | 1348 | read_lock(&bond->lock); |
b63365a2 | 1349 | |
b2a103e6 MM |
1350 | if (!bond->first_slave) { |
1351 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1352 | features |= NETIF_F_VLAN_CHALLENGED; | |
1353 | goto out; | |
1354 | } | |
b63365a2 | 1355 | |
b2a103e6 | 1356 | mask = features; |
b63365a2 | 1357 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1358 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1359 | |
54ef3137 | 1360 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1361 | features = netdev_increment_features(features, |
1362 | slave->dev->features, | |
b2a103e6 MM |
1363 | mask); |
1364 | } | |
b0ce3508 | 1365 | features = netdev_add_tso_features(features, mask); |
b2a103e6 MM |
1366 | |
1367 | out: | |
1368 | read_unlock(&bond->lock); | |
1369 | return features; | |
1370 | } | |
1371 | ||
62f2a3a4 MM |
1372 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1373 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1374 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1375 | |
1376 | static void bond_compute_features(struct bonding *bond) | |
1377 | { | |
1378 | struct slave *slave; | |
1379 | struct net_device *bond_dev = bond->dev; | |
c8f44aff | 1380 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
b2a103e6 | 1381 | unsigned short max_hard_header_len = ETH_HLEN; |
0e376bd0 SB |
1382 | unsigned int gso_max_size = GSO_MAX_SIZE; |
1383 | u16 gso_max_segs = GSO_MAX_SEGS; | |
b2a103e6 | 1384 | int i; |
b6fe83e9 | 1385 | unsigned int flags, dst_release_flag = IFF_XMIT_DST_RELEASE; |
b2a103e6 MM |
1386 | |
1387 | read_lock(&bond->lock); | |
1388 | ||
1389 | if (!bond->first_slave) | |
1390 | goto done; | |
1391 | ||
1392 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1393 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1394 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1395 | ||
b6fe83e9 | 1396 | dst_release_flag &= slave->dev->priv_flags; |
54ef3137 JV |
1397 | if (slave->dev->hard_header_len > max_hard_header_len) |
1398 | max_hard_header_len = slave->dev->hard_header_len; | |
0e376bd0 SB |
1399 | |
1400 | gso_max_size = min(gso_max_size, slave->dev->gso_max_size); | |
1401 | gso_max_segs = min(gso_max_segs, slave->dev->gso_max_segs); | |
54ef3137 | 1402 | } |
8531c5ff | 1403 | |
b63365a2 | 1404 | done: |
b2a103e6 | 1405 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1406 | bond_dev->hard_header_len = max_hard_header_len; |
0e376bd0 SB |
1407 | bond_dev->gso_max_segs = gso_max_segs; |
1408 | netif_set_gso_max_size(bond_dev, gso_max_size); | |
8531c5ff | 1409 | |
b6fe83e9 ED |
1410 | flags = bond_dev->priv_flags & ~IFF_XMIT_DST_RELEASE; |
1411 | bond_dev->priv_flags = flags | dst_release_flag; | |
1412 | ||
b2a103e6 MM |
1413 | read_unlock(&bond->lock); |
1414 | ||
1415 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1416 | } |
1417 | ||
872254dd MS |
1418 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1419 | struct net_device *slave_dev) | |
1420 | { | |
454d7c9b | 1421 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1422 | |
00829823 | 1423 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1424 | |
1425 | bond_dev->type = slave_dev->type; | |
1426 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1427 | bond_dev->addr_len = slave_dev->addr_len; | |
1428 | ||
1429 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1430 | slave_dev->addr_len); | |
d90a162a | 1431 | bond->setup_by_slave = 1; |
872254dd MS |
1432 | } |
1433 | ||
5b2c4dd2 | 1434 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1435 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1436 | */ |
1437 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1438 | struct slave *slave, |
1439 | struct bonding *bond) | |
5b2c4dd2 | 1440 | { |
2d7011ca | 1441 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1442 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1443 | skb->pkt_type != PACKET_BROADCAST && |
1444 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1445 | return false; |
5b2c4dd2 JP |
1446 | return true; |
1447 | } | |
1448 | return false; | |
1449 | } | |
1450 | ||
8a4eb573 | 1451 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1452 | { |
8a4eb573 | 1453 | struct sk_buff *skb = *pskb; |
f1c1775a | 1454 | struct slave *slave; |
0bd80dad | 1455 | struct bonding *bond; |
de063b70 ED |
1456 | int (*recv_probe)(const struct sk_buff *, struct bonding *, |
1457 | struct slave *); | |
13a8e0c8 | 1458 | int ret = RX_HANDLER_ANOTHER; |
5b2c4dd2 | 1459 | |
8a4eb573 JP |
1460 | skb = skb_share_check(skb, GFP_ATOMIC); |
1461 | if (unlikely(!skb)) | |
1462 | return RX_HANDLER_CONSUMED; | |
1463 | ||
1464 | *pskb = skb; | |
5b2c4dd2 | 1465 | |
35d48903 JP |
1466 | slave = bond_slave_get_rcu(skb->dev); |
1467 | bond = slave->bond; | |
0bd80dad JP |
1468 | |
1469 | if (bond->params.arp_interval) | |
f1c1775a | 1470 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1471 | |
4d97480b MH |
1472 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1473 | if (recv_probe) { | |
de063b70 ED |
1474 | ret = recv_probe(skb, bond, slave); |
1475 | if (ret == RX_HANDLER_CONSUMED) { | |
1476 | consume_skb(skb); | |
1477 | return ret; | |
3aba891d JP |
1478 | } |
1479 | } | |
1480 | ||
0bd80dad | 1481 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1482 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1483 | } |
1484 | ||
35d48903 | 1485 | skb->dev = bond->dev; |
5b2c4dd2 | 1486 | |
0bd80dad | 1487 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1488 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1489 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1490 | |
541ac7c9 CG |
1491 | if (unlikely(skb_cow_head(skb, |
1492 | skb->data - skb_mac_header(skb)))) { | |
1493 | kfree_skb(skb); | |
8a4eb573 | 1494 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1495 | } |
35d48903 | 1496 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1497 | } |
1498 | ||
13a8e0c8 | 1499 | return ret; |
5b2c4dd2 JP |
1500 | } |
1501 | ||
471cb5a3 JP |
1502 | static int bond_master_upper_dev_link(struct net_device *bond_dev, |
1503 | struct net_device *slave_dev) | |
1504 | { | |
1505 | int err; | |
1506 | ||
1507 | err = netdev_master_upper_dev_link(slave_dev, bond_dev); | |
1508 | if (err) | |
1509 | return err; | |
1510 | slave_dev->flags |= IFF_SLAVE; | |
1511 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE); | |
1512 | return 0; | |
1513 | } | |
1514 | ||
1515 | static void bond_upper_dev_unlink(struct net_device *bond_dev, | |
1516 | struct net_device *slave_dev) | |
1517 | { | |
1518 | netdev_upper_dev_unlink(slave_dev, bond_dev); | |
1519 | slave_dev->flags &= ~IFF_SLAVE; | |
1520 | rtmsg_ifinfo(RTM_NEWLINK, slave_dev, IFF_SLAVE); | |
1521 | } | |
1522 | ||
1da177e4 | 1523 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1524 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1525 | { |
454d7c9b | 1526 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1527 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1528 | struct slave *new_slave = NULL; |
22bedad3 | 1529 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1530 | struct sockaddr addr; |
1531 | int link_reporting; | |
1da177e4 LT |
1532 | int res = 0; |
1533 | ||
c772dde3 BH |
1534 | if (!bond->params.use_carrier && |
1535 | slave_dev->ethtool_ops->get_link == NULL && | |
1536 | slave_ops->ndo_do_ioctl == NULL) { | |
a4aee5c8 JP |
1537 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1538 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1539 | } |
1540 | ||
1da177e4 LT |
1541 | /* already enslaved */ |
1542 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1543 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1544 | return -EBUSY; |
1545 | } | |
1546 | ||
1547 | /* vlan challenged mutual exclusion */ | |
1548 | /* no need to lock since we're protected by rtnl_lock */ | |
1549 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1550 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
55462cf3 | 1551 | if (vlan_uses_dev(bond_dev)) { |
a4aee5c8 JP |
1552 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1553 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1554 | return -EPERM; |
1555 | } else { | |
a4aee5c8 JP |
1556 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1557 | bond_dev->name, slave_dev->name, | |
1558 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1559 | } |
1560 | } else { | |
5a03cdb7 | 1561 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1562 | } |
1563 | ||
217df670 JV |
1564 | /* |
1565 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1566 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1567 | * the current ifenslave will set the interface down prior to |
1568 | * enslaving it; the old ifenslave will not. | |
1569 | */ | |
1570 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1571 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1572 | slave_dev->name); |
1573 | res = -EPERM; | |
1574 | goto err_undo_flags; | |
1575 | } | |
1da177e4 | 1576 | |
872254dd MS |
1577 | /* set bonding device ether type by slave - bonding netdevices are |
1578 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1579 | * there is a need to override some of the type dependent attribs/funcs. | |
1580 | * | |
1581 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1582 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1583 | */ | |
1584 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1585 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1586 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1587 | bond_dev->name, |
1588 | bond_dev->type, slave_dev->type); | |
75c78500 | 1589 | |
b7bc2a5b AW |
1590 | res = call_netdevice_notifiers(NETDEV_PRE_TYPE_CHANGE, |
1591 | bond_dev); | |
3ca5b404 JP |
1592 | res = notifier_to_errno(res); |
1593 | if (res) { | |
1594 | pr_err("%s: refused to change device type\n", | |
1595 | bond_dev->name); | |
1596 | res = -EBUSY; | |
1597 | goto err_undo_flags; | |
1598 | } | |
75c78500 | 1599 | |
32a806c1 | 1600 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1601 | dev_uc_flush(bond_dev); |
22bedad3 | 1602 | dev_mc_flush(bond_dev); |
32a806c1 | 1603 | |
e36b9d16 MS |
1604 | if (slave_dev->type != ARPHRD_ETHER) |
1605 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1606 | else { |
e36b9d16 | 1607 | ether_setup(bond_dev); |
550fd08c NH |
1608 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1609 | } | |
75c78500 | 1610 | |
b7bc2a5b AW |
1611 | call_netdevice_notifiers(NETDEV_POST_TYPE_CHANGE, |
1612 | bond_dev); | |
e36b9d16 | 1613 | } |
872254dd | 1614 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1615 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1616 | slave_dev->name, | |
1617 | slave_dev->type, bond_dev->type); | |
1618 | res = -EINVAL; | |
1619 | goto err_undo_flags; | |
872254dd MS |
1620 | } |
1621 | ||
eb7cc59a | 1622 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1623 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1624 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1625 | bond_dev->name); | |
3915c1e8 JV |
1626 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1627 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1628 | 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", |
1629 | bond_dev->name); | |
2ab82852 MS |
1630 | res = -EOPNOTSUPP; |
1631 | goto err_undo_flags; | |
1632 | } | |
1da177e4 LT |
1633 | } |
1634 | ||
8d8fc29d AW |
1635 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1636 | ||
c20811a7 JP |
1637 | /* If this is the first slave, then we need to set the master's hardware |
1638 | * address to be the same as the slave's. */ | |
6c8c4e4c | 1639 | if (bond->slave_cnt == 0 && bond->dev_addr_from_first) |
409cc1f8 | 1640 | bond_set_dev_addr(bond->dev, slave_dev); |
c20811a7 | 1641 | |
243cb4e5 | 1642 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1643 | if (!new_slave) { |
1644 | res = -ENOMEM; | |
1645 | goto err_undo_flags; | |
1646 | } | |
1647 | ||
bb1d9123 AG |
1648 | /* |
1649 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1650 | * is set via sysfs or module option if desired. | |
1651 | */ | |
1652 | new_slave->queue_id = 0; | |
1653 | ||
b15ba0fb JP |
1654 | /* Save slave's original mtu and then set it to match the bond */ |
1655 | new_slave->original_mtu = slave_dev->mtu; | |
1656 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1657 | if (res) { | |
1658 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1659 | goto err_free; | |
1660 | } | |
1661 | ||
217df670 JV |
1662 | /* |
1663 | * Save slave's original ("permanent") mac address for modes | |
1664 | * that need it, and for restoring it upon release, and then | |
1665 | * set it to the master's address | |
1666 | */ | |
1667 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1668 | |
dd957c57 | 1669 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1670 | /* |
1671 | * Set slave to master's mac address. The application already | |
1672 | * set the master's mac address to that of the first slave | |
1673 | */ | |
1674 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1675 | addr.sa_family = slave_dev->type; | |
1676 | res = dev_set_mac_address(slave_dev, &addr); | |
1677 | if (res) { | |
5a03cdb7 | 1678 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1679 | goto err_restore_mtu; |
2ab82852 | 1680 | } |
217df670 | 1681 | } |
1da177e4 | 1682 | |
471cb5a3 | 1683 | res = bond_master_upper_dev_link(bond_dev, slave_dev); |
c2edacf8 | 1684 | if (res) { |
471cb5a3 | 1685 | pr_debug("Error %d calling bond_master_upper_dev_link\n", res); |
569f0c4d | 1686 | goto err_restore_mac; |
c2edacf8 | 1687 | } |
5b2c4dd2 | 1688 | |
217df670 JV |
1689 | /* open the slave since the application closed it */ |
1690 | res = dev_open(slave_dev); | |
1691 | if (res) { | |
3d632c3f | 1692 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1693 | goto err_unset_master; |
1da177e4 LT |
1694 | } |
1695 | ||
35d48903 | 1696 | new_slave->bond = bond; |
1da177e4 | 1697 | new_slave->dev = slave_dev; |
0b680e75 | 1698 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1699 | |
58402054 | 1700 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1701 | /* bond_alb_init_slave() must be called before all other stages since |
1702 | * it might fail and we do not want to have to undo everything | |
1703 | */ | |
1704 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1705 | if (res) |
569f0c4d | 1706 | goto err_close; |
1da177e4 LT |
1707 | } |
1708 | ||
1709 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1710 | * master's promisc (and mc) settings only if it becomes the | |
1711 | * curr_active_slave, and that is taken care of later when calling | |
1712 | * bond_change_active() | |
1713 | */ | |
1714 | if (!USES_PRIMARY(bond->params.mode)) { | |
1715 | /* set promiscuity level to new slave */ | |
1716 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1717 | res = dev_set_promiscuity(slave_dev, 1); |
1718 | if (res) | |
1719 | goto err_close; | |
1da177e4 LT |
1720 | } |
1721 | ||
1722 | /* set allmulti level to new slave */ | |
1723 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1724 | res = dev_set_allmulti(slave_dev, 1); |
1725 | if (res) | |
1726 | goto err_close; | |
1da177e4 LT |
1727 | } |
1728 | ||
b9e40857 | 1729 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1730 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1731 | netdev_for_each_mc_addr(ha, bond_dev) |
1732 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1733 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1734 | } |
1735 | ||
1736 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1737 | /* add lacpdu mc addr to mc list */ | |
1738 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1739 | ||
22bedad3 | 1740 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1741 | } |
1742 | ||
1743 | bond_add_vlans_on_slave(bond, slave_dev); | |
1744 | ||
1745 | write_lock_bh(&bond->lock); | |
1746 | ||
1747 | bond_attach_slave(bond, new_slave); | |
1748 | ||
1749 | new_slave->delay = 0; | |
1750 | new_slave->link_failure_count = 0; | |
1751 | ||
3915c1e8 JV |
1752 | write_unlock_bh(&bond->lock); |
1753 | ||
b2a103e6 MM |
1754 | bond_compute_features(bond); |
1755 | ||
876254ae VF |
1756 | bond_update_speed_duplex(new_slave); |
1757 | ||
3915c1e8 JV |
1758 | read_lock(&bond->lock); |
1759 | ||
f31c7937 MK |
1760 | new_slave->last_arp_rx = jiffies - |
1761 | (msecs_to_jiffies(bond->params.arp_interval) + 1); | |
f5b2b966 | 1762 | |
1da177e4 LT |
1763 | if (bond->params.miimon && !bond->params.use_carrier) { |
1764 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1765 | ||
1766 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1767 | /* | |
1768 | * miimon is set but a bonded network driver | |
1769 | * does not support ETHTOOL/MII and | |
1770 | * arp_interval is not set. Note: if | |
1771 | * use_carrier is enabled, we will never go | |
1772 | * here (because netif_carrier is always | |
1773 | * supported); thus, we don't need to change | |
1774 | * the messages for netif_carrier. | |
1775 | */ | |
a4aee5c8 | 1776 | 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 | 1777 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1778 | } else if (link_reporting == -1) { |
1779 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1780 | 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", |
1781 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1782 | } |
1783 | } | |
1784 | ||
1785 | /* check for initial state */ | |
f31c7937 MK |
1786 | if (bond->params.miimon) { |
1787 | if (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS) { | |
1788 | if (bond->params.updelay) { | |
1789 | new_slave->link = BOND_LINK_BACK; | |
1790 | new_slave->delay = bond->params.updelay; | |
1791 | } else { | |
1792 | new_slave->link = BOND_LINK_UP; | |
1793 | } | |
1da177e4 | 1794 | } else { |
f31c7937 | 1795 | new_slave->link = BOND_LINK_DOWN; |
1da177e4 | 1796 | } |
f31c7937 MK |
1797 | } else if (bond->params.arp_interval) { |
1798 | new_slave->link = (netif_carrier_ok(slave_dev) ? | |
1799 | BOND_LINK_UP : BOND_LINK_DOWN); | |
1da177e4 | 1800 | } else { |
f31c7937 | 1801 | new_slave->link = BOND_LINK_UP; |
1da177e4 LT |
1802 | } |
1803 | ||
f31c7937 MK |
1804 | if (new_slave->link != BOND_LINK_DOWN) |
1805 | new_slave->jiffies = jiffies; | |
1806 | pr_debug("Initial state of slave_dev is BOND_LINK_%s\n", | |
1807 | new_slave->link == BOND_LINK_DOWN ? "DOWN" : | |
1808 | (new_slave->link == BOND_LINK_UP ? "UP" : "BACK")); | |
1809 | ||
1da177e4 LT |
1810 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { |
1811 | /* if there is a primary slave, remember it */ | |
a549952a | 1812 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1813 | bond->primary_slave = new_slave; |
a549952a JP |
1814 | bond->force_primary = true; |
1815 | } | |
1da177e4 LT |
1816 | } |
1817 | ||
3915c1e8 JV |
1818 | write_lock_bh(&bond->curr_slave_lock); |
1819 | ||
1da177e4 LT |
1820 | switch (bond->params.mode) { |
1821 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1822 | bond_set_slave_inactive_flags(new_slave); |
1823 | bond_select_active_slave(bond); | |
1da177e4 LT |
1824 | break; |
1825 | case BOND_MODE_8023AD: | |
1826 | /* in 802.3ad mode, the internal mechanism | |
1827 | * will activate the slaves in the selected | |
1828 | * aggregator | |
1829 | */ | |
1830 | bond_set_slave_inactive_flags(new_slave); | |
1831 | /* if this is the first slave */ | |
1832 | if (bond->slave_cnt == 1) { | |
1833 | SLAVE_AD_INFO(new_slave).id = 1; | |
1834 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1835 | * can be called only after the mac address of the bond is set | |
1836 | */ | |
56d00c67 | 1837 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1838 | } else { |
1839 | SLAVE_AD_INFO(new_slave).id = | |
1840 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1841 | } | |
1842 | ||
1843 | bond_3ad_bind_slave(new_slave); | |
1844 | break; | |
1845 | case BOND_MODE_TLB: | |
1846 | case BOND_MODE_ALB: | |
e30bc066 | 1847 | bond_set_active_slave(new_slave); |
059fe7a5 | 1848 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1849 | bond_select_active_slave(bond); |
1da177e4 LT |
1850 | break; |
1851 | default: | |
5a03cdb7 | 1852 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1853 | |
1854 | /* always active in trunk mode */ | |
e30bc066 | 1855 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1856 | |
1857 | /* In trunking mode there is little meaning to curr_active_slave | |
1858 | * anyway (it holds no special properties of the bond device), | |
1859 | * so we can change it without calling change_active_interface() | |
1860 | */ | |
4e591b93 | 1861 | if (!bond->curr_active_slave && new_slave->link == BOND_LINK_UP) |
1da177e4 | 1862 | bond->curr_active_slave = new_slave; |
3d632c3f | 1863 | |
1da177e4 LT |
1864 | break; |
1865 | } /* switch(bond_mode) */ | |
1866 | ||
3915c1e8 JV |
1867 | write_unlock_bh(&bond->curr_slave_lock); |
1868 | ||
ff59c456 JV |
1869 | bond_set_carrier(bond); |
1870 | ||
f6dc31a8 | 1871 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1872 | slave_dev->npinfo = bond_netpoll_info(bond); |
1873 | if (slave_dev->npinfo) { | |
1874 | if (slave_enable_netpoll(new_slave)) { | |
1875 | read_unlock(&bond->lock); | |
1876 | pr_info("Error, %s: master_dev is using netpoll, " | |
1877 | "but new slave device does not support netpoll.\n", | |
1878 | bond_dev->name); | |
1879 | res = -EBUSY; | |
f7d9821a | 1880 | goto err_detach; |
8a8efa22 | 1881 | } |
f6dc31a8 WC |
1882 | } |
1883 | #endif | |
8a8efa22 | 1884 | |
3915c1e8 | 1885 | read_unlock(&bond->lock); |
1da177e4 | 1886 | |
b76cdba9 MW |
1887 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1888 | if (res) | |
f7d9821a | 1889 | goto err_detach; |
b76cdba9 | 1890 | |
35d48903 JP |
1891 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1892 | new_slave); | |
1893 | if (res) { | |
1894 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1895 | goto err_dest_symlinks; | |
1896 | } | |
1897 | ||
a4aee5c8 JP |
1898 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1899 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1900 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1901 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1902 | |
1903 | /* enslave is successful */ | |
1904 | return 0; | |
1905 | ||
1906 | /* Undo stages on error */ | |
35d48903 JP |
1907 | err_dest_symlinks: |
1908 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1909 | ||
f7d9821a | 1910 | err_detach: |
25e40305 | 1911 | if (!USES_PRIMARY(bond->params.mode)) { |
1912 | netif_addr_lock_bh(bond_dev); | |
1913 | bond_mc_list_flush(bond_dev, slave_dev); | |
1914 | netif_addr_unlock_bh(bond_dev); | |
1915 | } | |
a506e7b4 | 1916 | bond_del_vlans_from_slave(bond, slave_dev); |
f7d9821a | 1917 | write_lock_bh(&bond->lock); |
1918 | bond_detach_slave(bond, new_slave); | |
3c5913b5 | 1919 | if (bond->primary_slave == new_slave) |
1920 | bond->primary_slave = NULL; | |
3c5913b5 | 1921 | if (bond->curr_active_slave == new_slave) { |
c6cdcf6d | 1922 | bond_change_active_slave(bond, NULL); |
1923 | write_unlock_bh(&bond->lock); | |
3c5913b5 | 1924 | read_lock(&bond->lock); |
1925 | write_lock_bh(&bond->curr_slave_lock); | |
3c5913b5 | 1926 | bond_select_active_slave(bond); |
1927 | write_unlock_bh(&bond->curr_slave_lock); | |
1928 | read_unlock(&bond->lock); | |
c6cdcf6d | 1929 | } else { |
1930 | write_unlock_bh(&bond->lock); | |
3c5913b5 | 1931 | } |
fc7a72ac | 1932 | slave_disable_netpoll(new_slave); |
f7d9821a | 1933 | |
1da177e4 | 1934 | err_close: |
b6a5a7b9 | 1935 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
1936 | dev_close(slave_dev); |
1937 | ||
569f0c4d | 1938 | err_unset_master: |
471cb5a3 | 1939 | bond_upper_dev_unlink(bond_dev, slave_dev); |
569f0c4d | 1940 | |
1da177e4 | 1941 | err_restore_mac: |
dd957c57 | 1942 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1943 | /* XXX TODO - fom follow mode needs to change master's |
1944 | * MAC if this slave's MAC is in use by the bond, or at | |
1945 | * least print a warning. | |
1946 | */ | |
2ab82852 MS |
1947 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1948 | addr.sa_family = slave_dev->type; | |
1949 | dev_set_mac_address(slave_dev, &addr); | |
1950 | } | |
1da177e4 | 1951 | |
b15ba0fb JP |
1952 | err_restore_mtu: |
1953 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1954 | ||
1da177e4 LT |
1955 | err_free: |
1956 | kfree(new_slave); | |
1957 | ||
1958 | err_undo_flags: | |
b2a103e6 | 1959 | bond_compute_features(bond); |
3d632c3f | 1960 | |
1da177e4 LT |
1961 | return res; |
1962 | } | |
1963 | ||
1964 | /* | |
1965 | * Try to release the slave device <slave> from the bond device <master> | |
1966 | * It is legal to access curr_active_slave without a lock because all the function | |
0896341a | 1967 | * is write-locked. If "all" is true it means that the function is being called |
1968 | * while destroying a bond interface and all slaves are being released. | |
1da177e4 LT |
1969 | * |
1970 | * The rules for slave state should be: | |
1971 | * for Active/Backup: | |
1972 | * Active stays on all backups go down | |
1973 | * for Bonded connections: | |
1974 | * The first up interface should be left on and all others downed. | |
1975 | */ | |
0896341a | 1976 | static int __bond_release_one(struct net_device *bond_dev, |
1977 | struct net_device *slave_dev, | |
1978 | bool all) | |
1da177e4 | 1979 | { |
454d7c9b | 1980 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1981 | struct slave *slave, *oldcurrent; |
1982 | struct sockaddr addr; | |
c8f44aff | 1983 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1984 | |
1985 | /* slave is not a slave or master is not master of this slave */ | |
1986 | if (!(slave_dev->flags & IFF_SLAVE) || | |
471cb5a3 | 1987 | !netdev_has_upper_dev(slave_dev, bond_dev)) { |
a4aee5c8 | 1988 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1989 | bond_dev->name, slave_dev->name); |
1990 | return -EINVAL; | |
1991 | } | |
1992 | ||
e843fa50 | 1993 | block_netpoll_tx(); |
1da177e4 LT |
1994 | write_lock_bh(&bond->lock); |
1995 | ||
1996 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1997 | if (!slave) { | |
1998 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1999 | pr_info("%s: %s not enslaved\n", |
2000 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 2001 | write_unlock_bh(&bond->lock); |
e843fa50 | 2002 | unblock_netpoll_tx(); |
1da177e4 LT |
2003 | return -EINVAL; |
2004 | } | |
2005 | ||
fcd99434 | 2006 | write_unlock_bh(&bond->lock); |
35d48903 JP |
2007 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
2008 | * for this slave anymore. | |
2009 | */ | |
2010 | netdev_rx_handler_unregister(slave_dev); | |
35d48903 JP |
2011 | write_lock_bh(&bond->lock); |
2012 | ||
0896341a | 2013 | if (!all && !bond->params.fail_over_mac) { |
2e42e474 | 2014 | if (ether_addr_equal(bond_dev->dev_addr, slave->perm_hwaddr) && |
8e95a202 | 2015 | bond->slave_cnt > 1) |
a4aee5c8 JP |
2016 | 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", |
2017 | bond_dev->name, slave_dev->name, | |
2018 | slave->perm_hwaddr, | |
2019 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
2020 | } |
2021 | ||
2022 | /* Inform AD package of unbinding of slave. */ | |
2023 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2024 | /* must be called before the slave is | |
2025 | * detached from the list | |
2026 | */ | |
2027 | bond_3ad_unbind_slave(slave); | |
2028 | } | |
2029 | ||
a4aee5c8 JP |
2030 | pr_info("%s: releasing %s interface %s\n", |
2031 | bond_dev->name, | |
e30bc066 | 2032 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 2033 | slave_dev->name); |
1da177e4 LT |
2034 | |
2035 | oldcurrent = bond->curr_active_slave; | |
2036 | ||
2037 | bond->current_arp_slave = NULL; | |
2038 | ||
2039 | /* release the slave from its bond */ | |
2040 | bond_detach_slave(bond, slave); | |
2041 | ||
3d632c3f | 2042 | if (bond->primary_slave == slave) |
1da177e4 | 2043 | bond->primary_slave = NULL; |
1da177e4 | 2044 | |
3d632c3f | 2045 | if (oldcurrent == slave) |
1da177e4 | 2046 | bond_change_active_slave(bond, NULL); |
1da177e4 | 2047 | |
58402054 | 2048 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2049 | /* Must be called only after the slave has been |
2050 | * detached from the list and the curr_active_slave | |
2051 | * has been cleared (if our_slave == old_current), | |
2052 | * but before a new active slave is selected. | |
2053 | */ | |
2543331d | 2054 | write_unlock_bh(&bond->lock); |
1da177e4 | 2055 | bond_alb_deinit_slave(bond, slave); |
2543331d | 2056 | write_lock_bh(&bond->lock); |
1da177e4 LT |
2057 | } |
2058 | ||
0896341a | 2059 | if (all) { |
2060 | bond->curr_active_slave = NULL; | |
2061 | } else if (oldcurrent == slave) { | |
059fe7a5 JV |
2062 | /* |
2063 | * Note that we hold RTNL over this sequence, so there | |
2064 | * is no concern that another slave add/remove event | |
2065 | * will interfere. | |
2066 | */ | |
2067 | write_unlock_bh(&bond->lock); | |
2068 | read_lock(&bond->lock); | |
2069 | write_lock_bh(&bond->curr_slave_lock); | |
2070 | ||
1da177e4 LT |
2071 | bond_select_active_slave(bond); |
2072 | ||
059fe7a5 JV |
2073 | write_unlock_bh(&bond->curr_slave_lock); |
2074 | read_unlock(&bond->lock); | |
2075 | write_lock_bh(&bond->lock); | |
2076 | } | |
2077 | ||
1da177e4 | 2078 | if (bond->slave_cnt == 0) { |
ff59c456 | 2079 | bond_set_carrier(bond); |
409cc1f8 JP |
2080 | eth_hw_addr_random(bond_dev); |
2081 | bond->dev_addr_from_first = true; | |
1da177e4 | 2082 | |
cc0e4070 | 2083 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2084 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2085 | bond_dev->name, bond_dev->name); | |
2086 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2087 | bond_dev->name); | |
1da177e4 | 2088 | } |
1da177e4 LT |
2089 | } |
2090 | ||
2091 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2092 | unblock_netpoll_tx(); |
1da177e4 | 2093 | |
80028ea1 | 2094 | if (bond->slave_cnt == 0) { |
2af73d4b | 2095 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); |
80028ea1 VF |
2096 | call_netdevice_notifiers(NETDEV_RELEASE, bond->dev); |
2097 | } | |
2af73d4b | 2098 | |
b2a103e6 MM |
2099 | bond_compute_features(bond); |
2100 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2101 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2102 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2103 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2104 | ||
b76cdba9 MW |
2105 | /* must do this from outside any spinlocks */ |
2106 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2107 | ||
1da177e4 LT |
2108 | bond_del_vlans_from_slave(bond, slave_dev); |
2109 | ||
2110 | /* If the mode USES_PRIMARY, then we should only remove its | |
2111 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2112 | * already taken care of above when we detached the slave | |
2113 | */ | |
2114 | if (!USES_PRIMARY(bond->params.mode)) { | |
2115 | /* unset promiscuity level from slave */ | |
3d632c3f | 2116 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2117 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2118 | |
2119 | /* unset allmulti level from slave */ | |
3d632c3f | 2120 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2121 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2122 | |
2123 | /* flush master's mc_list from slave */ | |
b9e40857 | 2124 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2125 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2126 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2127 | } |
2128 | ||
471cb5a3 | 2129 | bond_upper_dev_unlink(bond_dev, slave_dev); |
1da177e4 | 2130 | |
8a8efa22 | 2131 | slave_disable_netpoll(slave); |
f6dc31a8 | 2132 | |
1da177e4 LT |
2133 | /* close slave before restoring its mac address */ |
2134 | dev_close(slave_dev); | |
2135 | ||
3915c1e8 | 2136 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2137 | /* restore original ("permanent") mac address */ |
2138 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2139 | addr.sa_family = slave_dev->type; | |
2140 | dev_set_mac_address(slave_dev, &addr); | |
2141 | } | |
1da177e4 | 2142 | |
b15ba0fb JP |
2143 | dev_set_mtu(slave_dev, slave->original_mtu); |
2144 | ||
2d7011ca | 2145 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2146 | |
2147 | kfree(slave); | |
2148 | ||
2149 | return 0; /* deletion OK */ | |
2150 | } | |
2151 | ||
0896341a | 2152 | /* A wrapper used because of ndo_del_link */ |
2153 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) | |
2154 | { | |
2155 | return __bond_release_one(bond_dev, slave_dev, false); | |
2156 | } | |
2157 | ||
d90a162a | 2158 | /* |
dadaa10b | 2159 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2160 | * Must be under rtnl_lock when this function is called. |
2161 | */ | |
26d8ee75 | 2162 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2163 | struct net_device *slave_dev) | |
d90a162a | 2164 | { |
454d7c9b | 2165 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2166 | int ret; |
2167 | ||
2168 | ret = bond_release(bond_dev, slave_dev); | |
2169 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2170 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2171 | pr_info("%s: destroying bond %s.\n", |
2172 | bond_dev->name, bond_dev->name); | |
9e71626c | 2173 | unregister_netdevice(bond_dev); |
d90a162a MS |
2174 | } |
2175 | return ret; | |
2176 | } | |
2177 | ||
1da177e4 LT |
2178 | /* |
2179 | * This function changes the active slave to slave <slave_dev>. | |
2180 | * It returns -EINVAL in the following cases. | |
2181 | * - <slave_dev> is not found in the list. | |
2182 | * - There is not active slave now. | |
2183 | * - <slave_dev> is already active. | |
2184 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2185 | * - <slave_dev> is not running. | |
3d632c3f SH |
2186 | * In these cases, this function does nothing. |
2187 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2188 | */ |
2189 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2190 | { | |
454d7c9b | 2191 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2192 | struct slave *old_active = NULL; |
2193 | struct slave *new_active = NULL; | |
2194 | int res = 0; | |
2195 | ||
3d632c3f | 2196 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2197 | return -EINVAL; |
1da177e4 | 2198 | |
471cb5a3 JP |
2199 | /* Verify that bond_dev is indeed the master of slave_dev */ |
2200 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2201 | !netdev_has_upper_dev(slave_dev, bond_dev)) | |
1da177e4 | 2202 | return -EINVAL; |
1da177e4 | 2203 | |
059fe7a5 | 2204 | read_lock(&bond->lock); |
1da177e4 | 2205 | |
059fe7a5 | 2206 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2207 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2208 | read_unlock(&bond->curr_slave_lock); |
2209 | ||
1da177e4 LT |
2210 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2211 | ||
2212 | /* | |
2213 | * Changing to the current active: do nothing; return success. | |
2214 | */ | |
2215 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2216 | read_unlock(&bond->lock); |
1da177e4 LT |
2217 | return 0; |
2218 | } | |
2219 | ||
2220 | if ((new_active) && | |
2221 | (old_active) && | |
2222 | (new_active->link == BOND_LINK_UP) && | |
2223 | IS_UP(new_active->dev)) { | |
e843fa50 | 2224 | block_netpoll_tx(); |
059fe7a5 | 2225 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2226 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2227 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2228 | unblock_netpoll_tx(); |
3d632c3f | 2229 | } else |
1da177e4 | 2230 | res = -EINVAL; |
1da177e4 | 2231 | |
059fe7a5 | 2232 | read_unlock(&bond->lock); |
1da177e4 LT |
2233 | |
2234 | return res; | |
2235 | } | |
2236 | ||
1da177e4 LT |
2237 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2238 | { | |
454d7c9b | 2239 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2240 | |
2241 | info->bond_mode = bond->params.mode; | |
2242 | info->miimon = bond->params.miimon; | |
2243 | ||
6603a6f2 | 2244 | read_lock(&bond->lock); |
1da177e4 | 2245 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2246 | read_unlock(&bond->lock); |
1da177e4 LT |
2247 | |
2248 | return 0; | |
2249 | } | |
2250 | ||
2251 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2252 | { | |
454d7c9b | 2253 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2254 | struct slave *slave; |
689c96cc | 2255 | int i, res = -ENODEV; |
1da177e4 | 2256 | |
6603a6f2 | 2257 | read_lock(&bond->lock); |
1da177e4 LT |
2258 | |
2259 | bond_for_each_slave(bond, slave, i) { | |
2260 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2261 | res = 0; |
2262 | strcpy(info->slave_name, slave->dev->name); | |
2263 | info->link = slave->link; | |
e30bc066 | 2264 | info->state = bond_slave_state(slave); |
689c96cc | 2265 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2266 | break; |
2267 | } | |
2268 | } | |
2269 | ||
6603a6f2 | 2270 | read_unlock(&bond->lock); |
1da177e4 | 2271 | |
689c96cc | 2272 | return res; |
1da177e4 LT |
2273 | } |
2274 | ||
2275 | /*-------------------------------- Monitoring -------------------------------*/ | |
2276 | ||
1da177e4 | 2277 | |
f0c76d61 JV |
2278 | static int bond_miimon_inspect(struct bonding *bond) |
2279 | { | |
2280 | struct slave *slave; | |
2281 | int i, link_state, commit = 0; | |
41f89100 JP |
2282 | bool ignore_updelay; |
2283 | ||
2284 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2285 | |
2286 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2287 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2288 | |
f0c76d61 | 2289 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2290 | |
2291 | switch (slave->link) { | |
f0c76d61 JV |
2292 | case BOND_LINK_UP: |
2293 | if (link_state) | |
2294 | continue; | |
1da177e4 | 2295 | |
f0c76d61 JV |
2296 | slave->link = BOND_LINK_FAIL; |
2297 | slave->delay = bond->params.downdelay; | |
2298 | if (slave->delay) { | |
a4aee5c8 JP |
2299 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2300 | bond->dev->name, | |
2301 | (bond->params.mode == | |
2302 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2303 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2304 | "active " : "backup ") : "", |
2305 | slave->dev->name, | |
2306 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2307 | } |
f0c76d61 JV |
2308 | /*FALLTHRU*/ |
2309 | case BOND_LINK_FAIL: | |
2310 | if (link_state) { | |
2311 | /* | |
2312 | * recovered before downdelay expired | |
2313 | */ | |
2314 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2315 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2316 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2317 | bond->dev->name, | |
2318 | (bond->params.downdelay - slave->delay) * | |
2319 | bond->params.miimon, | |
2320 | slave->dev->name); | |
f0c76d61 | 2321 | continue; |
1da177e4 | 2322 | } |
f0c76d61 JV |
2323 | |
2324 | if (slave->delay <= 0) { | |
2325 | slave->new_link = BOND_LINK_DOWN; | |
2326 | commit++; | |
2327 | continue; | |
1da177e4 | 2328 | } |
1da177e4 | 2329 | |
f0c76d61 JV |
2330 | slave->delay--; |
2331 | break; | |
2332 | ||
2333 | case BOND_LINK_DOWN: | |
2334 | if (!link_state) | |
2335 | continue; | |
2336 | ||
2337 | slave->link = BOND_LINK_BACK; | |
2338 | slave->delay = bond->params.updelay; | |
2339 | ||
2340 | if (slave->delay) { | |
a4aee5c8 JP |
2341 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2342 | bond->dev->name, slave->dev->name, | |
2343 | ignore_updelay ? 0 : | |
2344 | bond->params.updelay * | |
2345 | bond->params.miimon); | |
f0c76d61 JV |
2346 | } |
2347 | /*FALLTHRU*/ | |
2348 | case BOND_LINK_BACK: | |
2349 | if (!link_state) { | |
2350 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2351 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2352 | bond->dev->name, | |
2353 | (bond->params.updelay - slave->delay) * | |
2354 | bond->params.miimon, | |
2355 | slave->dev->name); | |
f0c76d61 JV |
2356 | |
2357 | continue; | |
2358 | } | |
2359 | ||
41f89100 JP |
2360 | if (ignore_updelay) |
2361 | slave->delay = 0; | |
2362 | ||
f0c76d61 JV |
2363 | if (slave->delay <= 0) { |
2364 | slave->new_link = BOND_LINK_UP; | |
2365 | commit++; | |
41f89100 | 2366 | ignore_updelay = false; |
f0c76d61 | 2367 | continue; |
1da177e4 | 2368 | } |
f0c76d61 JV |
2369 | |
2370 | slave->delay--; | |
1da177e4 | 2371 | break; |
f0c76d61 JV |
2372 | } |
2373 | } | |
1da177e4 | 2374 | |
f0c76d61 JV |
2375 | return commit; |
2376 | } | |
1da177e4 | 2377 | |
f0c76d61 JV |
2378 | static void bond_miimon_commit(struct bonding *bond) |
2379 | { | |
2380 | struct slave *slave; | |
2381 | int i; | |
2382 | ||
2383 | bond_for_each_slave(bond, slave, i) { | |
2384 | switch (slave->new_link) { | |
2385 | case BOND_LINK_NOCHANGE: | |
2386 | continue; | |
1da177e4 | 2387 | |
f0c76d61 JV |
2388 | case BOND_LINK_UP: |
2389 | slave->link = BOND_LINK_UP; | |
2390 | slave->jiffies = jiffies; | |
2391 | ||
2392 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2393 | /* prevent it from being the active one */ | |
e30bc066 | 2394 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2395 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2396 | /* make it immediately active */ | |
e30bc066 | 2397 | bond_set_active_slave(slave); |
f0c76d61 JV |
2398 | } else if (slave != bond->primary_slave) { |
2399 | /* prevent it from being the active one */ | |
e30bc066 | 2400 | bond_set_backup_slave(slave); |
1da177e4 | 2401 | } |
1da177e4 | 2402 | |
5d30530e | 2403 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2404 | bond->dev->name, slave->dev->name, |
2405 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2406 | |
f0c76d61 JV |
2407 | /* notify ad that the link status has changed */ |
2408 | if (bond->params.mode == BOND_MODE_8023AD) | |
2409 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2410 | |
58402054 | 2411 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2412 | bond_alb_handle_link_change(bond, slave, |
2413 | BOND_LINK_UP); | |
1da177e4 | 2414 | |
f0c76d61 JV |
2415 | if (!bond->curr_active_slave || |
2416 | (slave == bond->primary_slave)) | |
2417 | goto do_failover; | |
1da177e4 | 2418 | |
f0c76d61 | 2419 | continue; |
059fe7a5 | 2420 | |
f0c76d61 | 2421 | case BOND_LINK_DOWN: |
fba4acda JV |
2422 | if (slave->link_failure_count < UINT_MAX) |
2423 | slave->link_failure_count++; | |
2424 | ||
f0c76d61 | 2425 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2426 | |
f0c76d61 JV |
2427 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2428 | bond->params.mode == BOND_MODE_8023AD) | |
2429 | bond_set_slave_inactive_flags(slave); | |
2430 | ||
a4aee5c8 JP |
2431 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2432 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2433 | |
2434 | if (bond->params.mode == BOND_MODE_8023AD) | |
2435 | bond_3ad_handle_link_change(slave, | |
2436 | BOND_LINK_DOWN); | |
2437 | ||
ae63e808 | 2438 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2439 | bond_alb_handle_link_change(bond, slave, |
2440 | BOND_LINK_DOWN); | |
2441 | ||
2442 | if (slave == bond->curr_active_slave) | |
2443 | goto do_failover; | |
2444 | ||
2445 | continue; | |
2446 | ||
2447 | default: | |
a4aee5c8 | 2448 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2449 | bond->dev->name, slave->new_link, |
2450 | slave->dev->name); | |
2451 | slave->new_link = BOND_LINK_NOCHANGE; | |
2452 | ||
2453 | continue; | |
2454 | } | |
2455 | ||
2456 | do_failover: | |
2457 | ASSERT_RTNL(); | |
e843fa50 | 2458 | block_netpoll_tx(); |
f0c76d61 JV |
2459 | write_lock_bh(&bond->curr_slave_lock); |
2460 | bond_select_active_slave(bond); | |
2461 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2462 | unblock_netpoll_tx(); |
f0c76d61 JV |
2463 | } |
2464 | ||
2465 | bond_set_carrier(bond); | |
1da177e4 LT |
2466 | } |
2467 | ||
0b0eef66 JV |
2468 | /* |
2469 | * bond_mii_monitor | |
2470 | * | |
2471 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2472 | * inspection, then (if inspection indicates something needs to be done) |
2473 | * an acquisition of appropriate locks followed by a commit phase to | |
2474 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2475 | */ |
2476 | void bond_mii_monitor(struct work_struct *work) | |
2477 | { | |
2478 | struct bonding *bond = container_of(work, struct bonding, | |
2479 | mii_work.work); | |
ad246c99 | 2480 | bool should_notify_peers = false; |
e6d265e8 | 2481 | unsigned long delay; |
0b0eef66 JV |
2482 | |
2483 | read_lock(&bond->lock); | |
e6d265e8 JV |
2484 | |
2485 | delay = msecs_to_jiffies(bond->params.miimon); | |
f0c76d61 JV |
2486 | |
2487 | if (bond->slave_cnt == 0) | |
2488 | goto re_arm; | |
b59f9f74 | 2489 | |
ad246c99 BH |
2490 | should_notify_peers = bond_should_notify_peers(bond); |
2491 | ||
f0c76d61 | 2492 | if (bond_miimon_inspect(bond)) { |
0b0eef66 | 2493 | read_unlock(&bond->lock); |
e6d265e8 JV |
2494 | |
2495 | /* Race avoidance with bond_close cancel of workqueue */ | |
2496 | if (!rtnl_trylock()) { | |
2497 | read_lock(&bond->lock); | |
2498 | delay = 1; | |
2499 | should_notify_peers = false; | |
2500 | goto re_arm; | |
2501 | } | |
2502 | ||
0b0eef66 | 2503 | read_lock(&bond->lock); |
f0c76d61 JV |
2504 | |
2505 | bond_miimon_commit(bond); | |
2506 | ||
5655662d JV |
2507 | read_unlock(&bond->lock); |
2508 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2509 | read_lock(&bond->lock); | |
0b0eef66 JV |
2510 | } |
2511 | ||
f0c76d61 | 2512 | re_arm: |
e6d265e8 JV |
2513 | if (bond->params.miimon) |
2514 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2515 | ||
0b0eef66 | 2516 | read_unlock(&bond->lock); |
ad246c99 BH |
2517 | |
2518 | if (should_notify_peers) { | |
e6d265e8 JV |
2519 | if (!rtnl_trylock()) { |
2520 | read_lock(&bond->lock); | |
2521 | bond->send_peer_notif++; | |
2522 | read_unlock(&bond->lock); | |
2523 | return; | |
2524 | } | |
b7bc2a5b | 2525 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); |
ad246c99 BH |
2526 | rtnl_unlock(); |
2527 | } | |
0b0eef66 | 2528 | } |
c3ade5ca | 2529 | |
d3bb52b0 | 2530 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2531 | { |
0883beca | 2532 | struct vlan_entry *vlan; |
eaddcd76 | 2533 | struct net_device *vlan_dev; |
f5b2b966 | 2534 | |
eaddcd76 | 2535 | if (ip == bond_confirm_addr(bond->dev, 0, ip)) |
f5b2b966 JV |
2536 | return 1; |
2537 | ||
0883beca | 2538 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
eaddcd76 | 2539 | rcu_read_lock(); |
1fd9b1fc PM |
2540 | vlan_dev = __vlan_find_dev_deep(bond->dev, htons(ETH_P_8021Q), |
2541 | vlan->vlan_id); | |
eaddcd76 AG |
2542 | rcu_read_unlock(); |
2543 | if (vlan_dev && ip == bond_confirm_addr(vlan_dev, 0, ip)) | |
f5b2b966 JV |
2544 | return 1; |
2545 | } | |
2546 | ||
2547 | return 0; | |
2548 | } | |
2549 | ||
c3ade5ca JV |
2550 | /* |
2551 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2552 | * switches in VLAN mode (especially if ports are configured as | |
2553 | * "native" to a VLAN) might not pass non-tagged frames. | |
2554 | */ | |
d3bb52b0 | 2555 | 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 |
2556 | { |
2557 | struct sk_buff *skb; | |
2558 | ||
acca2674 | 2559 | pr_debug("arp %d on slave %s: dst %pI4 src %pI4 vid %d\n", arp_op, |
2560 | slave_dev->name, &dest_ip, &src_ip, vlan_id); | |
3d632c3f | 2561 | |
c3ade5ca JV |
2562 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2563 | NULL, slave_dev->dev_addr, NULL); | |
2564 | ||
2565 | if (!skb) { | |
a4aee5c8 | 2566 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2567 | return; |
2568 | } | |
2569 | if (vlan_id) { | |
1fd9b1fc | 2570 | skb = vlan_put_tag(skb, htons(ETH_P_8021Q), vlan_id); |
c3ade5ca | 2571 | if (!skb) { |
a4aee5c8 | 2572 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2573 | return; |
2574 | } | |
2575 | } | |
2576 | arp_xmit(skb); | |
2577 | } | |
2578 | ||
2579 | ||
1da177e4 LT |
2580 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2581 | { | |
b23dd4fe | 2582 | int i, vlan_id; |
d3bb52b0 | 2583 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2584 | struct vlan_entry *vlan; |
eaddcd76 | 2585 | struct net_device *vlan_dev = NULL; |
c3ade5ca | 2586 | struct rtable *rt; |
1da177e4 | 2587 | |
6b780567 | 2588 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
eaddcd76 | 2589 | __be32 addr; |
6b780567 | 2590 | if (!targets[i]) |
5a31bec0 | 2591 | break; |
acca2674 | 2592 | pr_debug("basa: target %pI4\n", &targets[i]); |
cc0e4070 | 2593 | if (!bond_vlan_used(bond)) { |
5a03cdb7 | 2594 | pr_debug("basa: empty vlan: arp_send\n"); |
eaddcd76 | 2595 | addr = bond_confirm_addr(bond->dev, targets[i], 0); |
c3ade5ca | 2596 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2597 | addr, 0); |
c3ade5ca JV |
2598 | continue; |
2599 | } | |
2600 | ||
2601 | /* | |
2602 | * If VLANs are configured, we do a route lookup to | |
2603 | * determine which VLAN interface would be used, so we | |
2604 | * can tag the ARP with the proper VLAN tag. | |
2605 | */ | |
78fbfd8a DM |
2606 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2607 | RTO_ONLINK, 0); | |
b23dd4fe | 2608 | if (IS_ERR(rt)) { |
c3ade5ca | 2609 | if (net_ratelimit()) { |
a4aee5c8 | 2610 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2611 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2612 | } |
2613 | continue; | |
2614 | } | |
2615 | ||
2616 | /* | |
2617 | * This target is not on a VLAN | |
2618 | */ | |
d8d1f30b | 2619 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2620 | ip_rt_put(rt); |
5a03cdb7 | 2621 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
eaddcd76 | 2622 | addr = bond_confirm_addr(bond->dev, targets[i], 0); |
c3ade5ca | 2623 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2624 | addr, 0); |
c3ade5ca JV |
2625 | continue; |
2626 | } | |
2627 | ||
2628 | vlan_id = 0; | |
0883beca | 2629 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
2630 | rcu_read_lock(); |
2631 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
1fd9b1fc | 2632 | htons(ETH_P_8021Q), |
cc0e4070 JP |
2633 | vlan->vlan_id); |
2634 | rcu_read_unlock(); | |
d8d1f30b | 2635 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2636 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2637 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2638 | vlan_dev->name, vlan_id); |
2639 | break; | |
2640 | } | |
2641 | } | |
2642 | ||
eaddcd76 | 2643 | if (vlan_id && vlan_dev) { |
ed4b9f80 | 2644 | ip_rt_put(rt); |
eaddcd76 | 2645 | addr = bond_confirm_addr(vlan_dev, targets[i], 0); |
c3ade5ca | 2646 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2647 | addr, vlan_id); |
c3ade5ca JV |
2648 | continue; |
2649 | } | |
2650 | ||
2651 | if (net_ratelimit()) { | |
a4aee5c8 | 2652 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2653 | bond->dev->name, &targets[i], |
d8d1f30b | 2654 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2655 | } |
ed4b9f80 | 2656 | ip_rt_put(rt); |
c3ade5ca JV |
2657 | } |
2658 | } | |
2659 | ||
d3bb52b0 | 2660 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2661 | { |
2662 | int i; | |
d3bb52b0 | 2663 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2664 | |
f5b2b966 | 2665 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2666 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2667 | &sip, &tip, i, &targets[i], |
2668 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2669 | if (sip == targets[i]) { |
2670 | if (bond_has_this_ip(bond, tip)) | |
2671 | slave->last_arp_rx = jiffies; | |
2672 | return; | |
2673 | } | |
2674 | } | |
2675 | } | |
2676 | ||
de063b70 ED |
2677 | static int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, |
2678 | struct slave *slave) | |
f5b2b966 | 2679 | { |
de063b70 | 2680 | struct arphdr *arp = (struct arphdr *)skb->data; |
f5b2b966 | 2681 | unsigned char *arp_ptr; |
d3bb52b0 | 2682 | __be32 sip, tip; |
de063b70 | 2683 | int alen; |
f5b2b966 | 2684 | |
3aba891d | 2685 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
13a8e0c8 | 2686 | return RX_HANDLER_ANOTHER; |
f5b2b966 | 2687 | |
f5b2b966 | 2688 | read_lock(&bond->lock); |
de063b70 | 2689 | alen = arp_hdr_len(bond->dev); |
f5b2b966 | 2690 | |
3aba891d JP |
2691 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2692 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2693 | |
de063b70 ED |
2694 | if (alen > skb_headlen(skb)) { |
2695 | arp = kmalloc(alen, GFP_ATOMIC); | |
2696 | if (!arp) | |
2697 | goto out_unlock; | |
2698 | if (skb_copy_bits(skb, 0, arp, alen) < 0) | |
2699 | goto out_unlock; | |
2700 | } | |
f5b2b966 | 2701 | |
3aba891d | 2702 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2703 | skb->pkt_type == PACKET_OTHERHOST || |
2704 | skb->pkt_type == PACKET_LOOPBACK || | |
2705 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2706 | arp->ar_pro != htons(ETH_P_IP) || | |
2707 | arp->ar_pln != 4) | |
2708 | goto out_unlock; | |
2709 | ||
2710 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2711 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2712 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2713 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2714 | memcpy(&tip, arp_ptr, 4); |
2715 | ||
5a03cdb7 | 2716 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2717 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2718 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2719 | &sip, &tip); | |
f5b2b966 JV |
2720 | |
2721 | /* | |
2722 | * Backup slaves won't see the ARP reply, but do come through | |
2723 | * here for each ARP probe (so we swap the sip/tip to validate | |
2724 | * the probe). In a "redundant switch, common router" type of | |
2725 | * configuration, the ARP probe will (hopefully) travel from | |
2726 | * the active, through one switch, the router, then the other | |
2727 | * switch before reaching the backup. | |
2728 | */ | |
e30bc066 | 2729 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2730 | bond_validate_arp(bond, slave, sip, tip); |
2731 | else | |
2732 | bond_validate_arp(bond, slave, tip, sip); | |
2733 | ||
2734 | out_unlock: | |
2735 | read_unlock(&bond->lock); | |
de063b70 ED |
2736 | if (arp != (struct arphdr *)skb->data) |
2737 | kfree(arp); | |
13a8e0c8 | 2738 | return RX_HANDLER_ANOTHER; |
f5b2b966 JV |
2739 | } |
2740 | ||
1da177e4 LT |
2741 | /* |
2742 | * this function is called regularly to monitor each slave's link | |
2743 | * ensuring that traffic is being sent and received when arp monitoring | |
2744 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2745 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2746 | * arp monitoring in active backup mode. | |
2747 | */ | |
1b76b316 | 2748 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2749 | { |
1b76b316 JV |
2750 | struct bonding *bond = container_of(work, struct bonding, |
2751 | arp_work.work); | |
1da177e4 LT |
2752 | struct slave *slave, *oldcurrent; |
2753 | int do_failover = 0; | |
da210f55 | 2754 | int delta_in_ticks, extra_ticks; |
1da177e4 LT |
2755 | int i; |
2756 | ||
2757 | read_lock(&bond->lock); | |
2758 | ||
5ce0da8f | 2759 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
da210f55 | 2760 | extra_ticks = delta_in_ticks / 2; |
1da177e4 | 2761 | |
3d632c3f | 2762 | if (bond->slave_cnt == 0) |
1da177e4 | 2763 | goto re_arm; |
1da177e4 LT |
2764 | |
2765 | read_lock(&bond->curr_slave_lock); | |
2766 | oldcurrent = bond->curr_active_slave; | |
2767 | read_unlock(&bond->curr_slave_lock); | |
2768 | ||
2769 | /* see if any of the previous devices are up now (i.e. they have | |
2770 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2771 | * the picture unless it is null. also, slave->jiffies is not needed | |
2772 | * here because we send an arp on each slave and give a slave as | |
2773 | * long as it needs to get the tx/rx within the delta. | |
2774 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2775 | * so it can wait | |
2776 | */ | |
2777 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2778 | unsigned long trans_start = dev_trans_start(slave->dev); |
2779 | ||
1da177e4 | 2780 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2781 | if (time_in_range(jiffies, |
2782 | trans_start - delta_in_ticks, | |
da210f55 | 2783 | trans_start + delta_in_ticks + extra_ticks) && |
cb32f2a0 JB |
2784 | time_in_range(jiffies, |
2785 | slave->dev->last_rx - delta_in_ticks, | |
da210f55 | 2786 | slave->dev->last_rx + delta_in_ticks + extra_ticks)) { |
1da177e4 LT |
2787 | |
2788 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2789 | bond_set_active_slave(slave); |
1da177e4 LT |
2790 | |
2791 | /* primary_slave has no meaning in round-robin | |
2792 | * mode. the window of a slave being up and | |
2793 | * curr_active_slave being null after enslaving | |
2794 | * is closed. | |
2795 | */ | |
2796 | if (!oldcurrent) { | |
a4aee5c8 JP |
2797 | pr_info("%s: link status definitely up for interface %s, ", |
2798 | bond->dev->name, | |
2799 | slave->dev->name); | |
1da177e4 LT |
2800 | do_failover = 1; |
2801 | } else { | |
a4aee5c8 JP |
2802 | pr_info("%s: interface %s is now up\n", |
2803 | bond->dev->name, | |
2804 | slave->dev->name); | |
1da177e4 LT |
2805 | } |
2806 | } | |
2807 | } else { | |
2808 | /* slave->link == BOND_LINK_UP */ | |
2809 | ||
2810 | /* not all switches will respond to an arp request | |
2811 | * when the source ip is 0, so don't take the link down | |
2812 | * if we don't know our ip yet | |
2813 | */ | |
cb32f2a0 JB |
2814 | if (!time_in_range(jiffies, |
2815 | trans_start - delta_in_ticks, | |
da210f55 | 2816 | trans_start + 2 * delta_in_ticks + extra_ticks) || |
cb32f2a0 JB |
2817 | !time_in_range(jiffies, |
2818 | slave->dev->last_rx - delta_in_ticks, | |
da210f55 | 2819 | slave->dev->last_rx + 2 * delta_in_ticks + extra_ticks)) { |
1da177e4 LT |
2820 | |
2821 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2822 | bond_set_backup_slave(slave); |
1da177e4 | 2823 | |
3d632c3f | 2824 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2825 | slave->link_failure_count++; |
1da177e4 | 2826 | |
a4aee5c8 JP |
2827 | pr_info("%s: interface %s is now down.\n", |
2828 | bond->dev->name, | |
2829 | slave->dev->name); | |
1da177e4 | 2830 | |
3d632c3f | 2831 | if (slave == oldcurrent) |
1da177e4 | 2832 | do_failover = 1; |
1da177e4 LT |
2833 | } |
2834 | } | |
2835 | ||
2836 | /* note: if switch is in round-robin mode, all links | |
2837 | * must tx arp to ensure all links rx an arp - otherwise | |
2838 | * links may oscillate or not come up at all; if switch is | |
2839 | * in something like xor mode, there is nothing we can | |
2840 | * do - all replies will be rx'ed on same link causing slaves | |
2841 | * to be unstable during low/no traffic periods | |
2842 | */ | |
3d632c3f | 2843 | if (IS_UP(slave->dev)) |
1da177e4 | 2844 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2845 | } |
2846 | ||
2847 | if (do_failover) { | |
e843fa50 | 2848 | block_netpoll_tx(); |
059fe7a5 | 2849 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2850 | |
2851 | bond_select_active_slave(bond); | |
2852 | ||
059fe7a5 | 2853 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2854 | unblock_netpoll_tx(); |
1da177e4 LT |
2855 | } |
2856 | ||
2857 | re_arm: | |
e6d265e8 | 2858 | if (bond->params.arp_interval) |
1b76b316 | 2859 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 2860 | |
1da177e4 LT |
2861 | read_unlock(&bond->lock); |
2862 | } | |
2863 | ||
2864 | /* | |
b2220cad JV |
2865 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2866 | * changes. Sets new_link in slaves to specify what action should take | |
2867 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2868 | * to link states must be committed. | |
2869 | * | |
2870 | * Called with bond->lock held for read. | |
1da177e4 | 2871 | */ |
b2220cad | 2872 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2873 | { |
1da177e4 | 2874 | struct slave *slave; |
b2220cad | 2875 | int i, commit = 0; |
cb32f2a0 | 2876 | unsigned long trans_start; |
da210f55 JB |
2877 | int extra_ticks; |
2878 | ||
2879 | /* All the time comparisons below need some extra time. Otherwise, on | |
2880 | * fast networks the ARP probe/reply may arrive within the same jiffy | |
2881 | * as it was sent. Then, the next time the ARP monitor is run, one | |
2882 | * arp_interval will already have passed in the comparisons. | |
2883 | */ | |
2884 | extra_ticks = delta_in_ticks / 2; | |
1da177e4 | 2885 | |
b2220cad JV |
2886 | bond_for_each_slave(bond, slave, i) { |
2887 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2888 | |
b2220cad | 2889 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2890 | if (time_in_range(jiffies, |
2891 | slave_last_rx(bond, slave) - delta_in_ticks, | |
da210f55 | 2892 | slave_last_rx(bond, slave) + delta_in_ticks + extra_ticks)) { |
cb32f2a0 | 2893 | |
b2220cad JV |
2894 | slave->new_link = BOND_LINK_UP; |
2895 | commit++; | |
2896 | } | |
1da177e4 | 2897 | |
b2220cad JV |
2898 | continue; |
2899 | } | |
1da177e4 | 2900 | |
b2220cad JV |
2901 | /* |
2902 | * Give slaves 2*delta after being enslaved or made | |
2903 | * active. This avoids bouncing, as the last receive | |
2904 | * times need a full ARP monitor cycle to be updated. | |
2905 | */ | |
cb32f2a0 JB |
2906 | if (time_in_range(jiffies, |
2907 | slave->jiffies - delta_in_ticks, | |
da210f55 | 2908 | slave->jiffies + 2 * delta_in_ticks + extra_ticks)) |
b2220cad JV |
2909 | continue; |
2910 | ||
2911 | /* | |
2912 | * Backup slave is down if: | |
2913 | * - No current_arp_slave AND | |
2914 | * - more than 3*delta since last receive AND | |
2915 | * - the bond has an IP address | |
2916 | * | |
2917 | * Note: a non-null current_arp_slave indicates | |
2918 | * the curr_active_slave went down and we are | |
2919 | * searching for a new one; under this condition | |
2920 | * we only take the curr_active_slave down - this | |
2921 | * gives each slave a chance to tx/rx traffic | |
2922 | * before being taken out | |
2923 | */ | |
e30bc066 | 2924 | if (!bond_is_active_slave(slave) && |
b2220cad | 2925 | !bond->current_arp_slave && |
cb32f2a0 JB |
2926 | !time_in_range(jiffies, |
2927 | slave_last_rx(bond, slave) - delta_in_ticks, | |
da210f55 | 2928 | slave_last_rx(bond, slave) + 3 * delta_in_ticks + extra_ticks)) { |
cb32f2a0 | 2929 | |
b2220cad JV |
2930 | slave->new_link = BOND_LINK_DOWN; |
2931 | commit++; | |
2932 | } | |
2933 | ||
2934 | /* | |
2935 | * Active slave is down if: | |
2936 | * - more than 2*delta since transmitting OR | |
2937 | * - (more than 2*delta since receive AND | |
2938 | * the bond has an IP address) | |
2939 | */ | |
cb32f2a0 | 2940 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2941 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
2942 | (!time_in_range(jiffies, |
2943 | trans_start - delta_in_ticks, | |
da210f55 | 2944 | trans_start + 2 * delta_in_ticks + extra_ticks) || |
cb32f2a0 JB |
2945 | !time_in_range(jiffies, |
2946 | slave_last_rx(bond, slave) - delta_in_ticks, | |
da210f55 | 2947 | slave_last_rx(bond, slave) + 2 * delta_in_ticks + extra_ticks))) { |
cb32f2a0 | 2948 | |
b2220cad JV |
2949 | slave->new_link = BOND_LINK_DOWN; |
2950 | commit++; | |
2951 | } | |
1da177e4 LT |
2952 | } |
2953 | ||
b2220cad JV |
2954 | return commit; |
2955 | } | |
1da177e4 | 2956 | |
b2220cad JV |
2957 | /* |
2958 | * Called to commit link state changes noted by inspection step of | |
2959 | * active-backup mode ARP monitor. | |
2960 | * | |
2961 | * Called with RTNL and bond->lock for read. | |
2962 | */ | |
2963 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2964 | { | |
2965 | struct slave *slave; | |
2966 | int i; | |
cb32f2a0 | 2967 | unsigned long trans_start; |
1da177e4 | 2968 | |
b2220cad JV |
2969 | bond_for_each_slave(bond, slave, i) { |
2970 | switch (slave->new_link) { | |
2971 | case BOND_LINK_NOCHANGE: | |
2972 | continue; | |
ff59c456 | 2973 | |
b2220cad | 2974 | case BOND_LINK_UP: |
cb32f2a0 | 2975 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 2976 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
2977 | time_in_range(jiffies, |
2978 | trans_start - delta_in_ticks, | |
da210f55 | 2979 | trans_start + delta_in_ticks + delta_in_ticks / 2)) || |
b9f60253 | 2980 | bond->curr_active_slave != slave) { |
b2220cad | 2981 | slave->link = BOND_LINK_UP; |
5a430974 VF |
2982 | if (bond->current_arp_slave) { |
2983 | bond_set_slave_inactive_flags( | |
2984 | bond->current_arp_slave); | |
2985 | bond->current_arp_slave = NULL; | |
2986 | } | |
b2220cad | 2987 | |
a4aee5c8 | 2988 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 2989 | bond->dev->name, slave->dev->name); |
b2220cad | 2990 | |
b9f60253 JP |
2991 | if (!bond->curr_active_slave || |
2992 | (slave == bond->primary_slave)) | |
2993 | goto do_failover; | |
1da177e4 | 2994 | |
b9f60253 | 2995 | } |
1da177e4 | 2996 | |
b9f60253 | 2997 | continue; |
1da177e4 | 2998 | |
b2220cad JV |
2999 | case BOND_LINK_DOWN: |
3000 | if (slave->link_failure_count < UINT_MAX) | |
3001 | slave->link_failure_count++; | |
3002 | ||
3003 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3004 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3005 | |
a4aee5c8 | 3006 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3007 | bond->dev->name, slave->dev->name); |
b2220cad | 3008 | |
b9f60253 | 3009 | if (slave == bond->curr_active_slave) { |
b2220cad | 3010 | bond->current_arp_slave = NULL; |
b9f60253 | 3011 | goto do_failover; |
1da177e4 | 3012 | } |
b9f60253 JP |
3013 | |
3014 | continue; | |
b2220cad JV |
3015 | |
3016 | default: | |
a4aee5c8 | 3017 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3018 | bond->dev->name, slave->new_link, |
3019 | slave->dev->name); | |
b9f60253 | 3020 | continue; |
1da177e4 | 3021 | } |
1da177e4 | 3022 | |
b9f60253 JP |
3023 | do_failover: |
3024 | ASSERT_RTNL(); | |
e843fa50 | 3025 | block_netpoll_tx(); |
b2220cad | 3026 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3027 | bond_select_active_slave(bond); |
b2220cad | 3028 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3029 | unblock_netpoll_tx(); |
b2220cad | 3030 | } |
1da177e4 | 3031 | |
b2220cad JV |
3032 | bond_set_carrier(bond); |
3033 | } | |
1da177e4 | 3034 | |
b2220cad JV |
3035 | /* |
3036 | * Send ARP probes for active-backup mode ARP monitor. | |
3037 | * | |
3038 | * Called with bond->lock held for read. | |
3039 | */ | |
3040 | static void bond_ab_arp_probe(struct bonding *bond) | |
3041 | { | |
3042 | struct slave *slave; | |
3043 | int i; | |
1da177e4 | 3044 | |
b2220cad | 3045 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3046 | |
b2220cad | 3047 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3048 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3049 | bond->current_arp_slave->dev->name, | |
3050 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3051 | |
b2220cad JV |
3052 | if (bond->curr_active_slave) { |
3053 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3054 | read_unlock(&bond->curr_slave_lock); | |
3055 | return; | |
3056 | } | |
1da177e4 | 3057 | |
b2220cad | 3058 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3059 | |
b2220cad JV |
3060 | /* if we don't have a curr_active_slave, search for the next available |
3061 | * backup slave from the current_arp_slave and make it the candidate | |
3062 | * for becoming the curr_active_slave | |
3063 | */ | |
1da177e4 | 3064 | |
b2220cad JV |
3065 | if (!bond->current_arp_slave) { |
3066 | bond->current_arp_slave = bond->first_slave; | |
3067 | if (!bond->current_arp_slave) | |
3068 | return; | |
3069 | } | |
1da177e4 | 3070 | |
b2220cad | 3071 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3072 | |
b2220cad JV |
3073 | /* search for next candidate */ |
3074 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3075 | if (IS_UP(slave->dev)) { | |
3076 | slave->link = BOND_LINK_BACK; | |
3077 | bond_set_slave_active_flags(slave); | |
3078 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3079 | slave->jiffies = jiffies; |
b2220cad JV |
3080 | bond->current_arp_slave = slave; |
3081 | break; | |
1da177e4 LT |
3082 | } |
3083 | ||
b2220cad JV |
3084 | /* if the link state is up at this point, we |
3085 | * mark it down - this can happen if we have | |
3086 | * simultaneous link failures and | |
3087 | * reselect_active_interface doesn't make this | |
3088 | * one the current slave so it is still marked | |
3089 | * up when it is actually down | |
1da177e4 | 3090 | */ |
b2220cad JV |
3091 | if (slave->link == BOND_LINK_UP) { |
3092 | slave->link = BOND_LINK_DOWN; | |
3093 | if (slave->link_failure_count < UINT_MAX) | |
3094 | slave->link_failure_count++; | |
1da177e4 | 3095 | |
b2220cad JV |
3096 | bond_set_slave_inactive_flags(slave); |
3097 | ||
a4aee5c8 JP |
3098 | pr_info("%s: backup interface %s is now down.\n", |
3099 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3100 | } |
b2220cad JV |
3101 | } |
3102 | } | |
1da177e4 | 3103 | |
b2220cad JV |
3104 | void bond_activebackup_arp_mon(struct work_struct *work) |
3105 | { | |
3106 | struct bonding *bond = container_of(work, struct bonding, | |
3107 | arp_work.work); | |
ad246c99 | 3108 | bool should_notify_peers = false; |
b2220cad | 3109 | int delta_in_ticks; |
1da177e4 | 3110 | |
b2220cad | 3111 | read_lock(&bond->lock); |
1da177e4 | 3112 | |
b2220cad | 3113 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3114 | |
b2220cad JV |
3115 | if (bond->slave_cnt == 0) |
3116 | goto re_arm; | |
3117 | ||
ad246c99 BH |
3118 | should_notify_peers = bond_should_notify_peers(bond); |
3119 | ||
b2220cad JV |
3120 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3121 | read_unlock(&bond->lock); | |
e6d265e8 JV |
3122 | |
3123 | /* Race avoidance with bond_close flush of workqueue */ | |
3124 | if (!rtnl_trylock()) { | |
3125 | read_lock(&bond->lock); | |
3126 | delta_in_ticks = 1; | |
3127 | should_notify_peers = false; | |
3128 | goto re_arm; | |
3129 | } | |
3130 | ||
b2220cad JV |
3131 | read_lock(&bond->lock); |
3132 | ||
3133 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3134 | ||
3135 | read_unlock(&bond->lock); | |
3136 | rtnl_unlock(); | |
3137 | read_lock(&bond->lock); | |
1da177e4 LT |
3138 | } |
3139 | ||
b2220cad JV |
3140 | bond_ab_arp_probe(bond); |
3141 | ||
1da177e4 | 3142 | re_arm: |
e6d265e8 | 3143 | if (bond->params.arp_interval) |
1b76b316 | 3144 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 3145 | |
1da177e4 | 3146 | read_unlock(&bond->lock); |
ad246c99 BH |
3147 | |
3148 | if (should_notify_peers) { | |
e6d265e8 JV |
3149 | if (!rtnl_trylock()) { |
3150 | read_lock(&bond->lock); | |
3151 | bond->send_peer_notif++; | |
3152 | read_unlock(&bond->lock); | |
3153 | return; | |
3154 | } | |
b7bc2a5b | 3155 | call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, bond->dev); |
ad246c99 BH |
3156 | rtnl_unlock(); |
3157 | } | |
1da177e4 LT |
3158 | } |
3159 | ||
1da177e4 LT |
3160 | /*-------------------------- netdev event handling --------------------------*/ |
3161 | ||
3162 | /* | |
3163 | * Change device name | |
3164 | */ | |
3165 | static int bond_event_changename(struct bonding *bond) | |
3166 | { | |
1da177e4 LT |
3167 | bond_remove_proc_entry(bond); |
3168 | bond_create_proc_entry(bond); | |
7e083840 | 3169 | |
f073c7ca TI |
3170 | bond_debug_reregister(bond); |
3171 | ||
1da177e4 LT |
3172 | return NOTIFY_DONE; |
3173 | } | |
3174 | ||
3d632c3f SH |
3175 | static int bond_master_netdev_event(unsigned long event, |
3176 | struct net_device *bond_dev) | |
1da177e4 | 3177 | { |
454d7c9b | 3178 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3179 | |
3180 | switch (event) { | |
3181 | case NETDEV_CHANGENAME: | |
3182 | return bond_event_changename(event_bond); | |
a64d49c3 EB |
3183 | case NETDEV_UNREGISTER: |
3184 | bond_remove_proc_entry(event_bond); | |
3185 | break; | |
3186 | case NETDEV_REGISTER: | |
3187 | bond_create_proc_entry(event_bond); | |
3188 | break; | |
1da177e4 LT |
3189 | default: |
3190 | break; | |
3191 | } | |
3192 | ||
3193 | return NOTIFY_DONE; | |
3194 | } | |
3195 | ||
3d632c3f SH |
3196 | static int bond_slave_netdev_event(unsigned long event, |
3197 | struct net_device *slave_dev) | |
1da177e4 | 3198 | { |
471cb5a3 | 3199 | struct slave *slave = bond_slave_get_rtnl(slave_dev); |
6101391d | 3200 | struct bonding *bond; |
3201 | struct net_device *bond_dev; | |
471cb5a3 JP |
3202 | u32 old_speed; |
3203 | u8 old_duplex; | |
1da177e4 | 3204 | |
6101391d | 3205 | /* A netdev event can be generated while enslaving a device |
3206 | * before netdev_rx_handler_register is called in which case | |
3207 | * slave will be NULL | |
3208 | */ | |
3209 | if (!slave) | |
3210 | return NOTIFY_DONE; | |
3211 | bond_dev = slave->bond->dev; | |
3212 | bond = slave->bond; | |
3213 | ||
1da177e4 LT |
3214 | switch (event) { |
3215 | case NETDEV_UNREGISTER: | |
471cb5a3 JP |
3216 | if (bond->setup_by_slave) |
3217 | bond_release_and_destroy(bond_dev, slave_dev); | |
3218 | else | |
3219 | bond_release(bond_dev, slave_dev); | |
1da177e4 | 3220 | break; |
98f41f69 | 3221 | case NETDEV_UP: |
1da177e4 | 3222 | case NETDEV_CHANGE: |
471cb5a3 JP |
3223 | old_speed = slave->speed; |
3224 | old_duplex = slave->duplex; | |
17d04500 | 3225 | |
471cb5a3 | 3226 | bond_update_speed_duplex(slave); |
17d04500 | 3227 | |
471cb5a3 JP |
3228 | if (bond->params.mode == BOND_MODE_8023AD) { |
3229 | if (old_speed != slave->speed) | |
3230 | bond_3ad_adapter_speed_changed(slave); | |
3231 | if (old_duplex != slave->duplex) | |
3232 | bond_3ad_adapter_duplex_changed(slave); | |
17d04500 | 3233 | } |
1da177e4 LT |
3234 | break; |
3235 | case NETDEV_DOWN: | |
3236 | /* | |
3237 | * ... Or is it this? | |
3238 | */ | |
3239 | break; | |
3240 | case NETDEV_CHANGEMTU: | |
3241 | /* | |
3242 | * TODO: Should slaves be allowed to | |
3243 | * independently alter their MTU? For | |
3244 | * an active-backup bond, slaves need | |
3245 | * not be the same type of device, so | |
3246 | * MTUs may vary. For other modes, | |
3247 | * slaves arguably should have the | |
3248 | * same MTUs. To do this, we'd need to | |
3249 | * take over the slave's change_mtu | |
3250 | * function for the duration of their | |
3251 | * servitude. | |
3252 | */ | |
3253 | break; | |
3254 | case NETDEV_CHANGENAME: | |
3255 | /* | |
3256 | * TODO: handle changing the primary's name | |
3257 | */ | |
3258 | break; | |
8531c5ff AK |
3259 | case NETDEV_FEAT_CHANGE: |
3260 | bond_compute_features(bond); | |
3261 | break; | |
1da177e4 LT |
3262 | default: |
3263 | break; | |
3264 | } | |
3265 | ||
3266 | return NOTIFY_DONE; | |
3267 | } | |
3268 | ||
3269 | /* | |
3270 | * bond_netdev_event: handle netdev notifier chain events. | |
3271 | * | |
3272 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3273 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3274 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3275 | * dev_probe_lock). | |
3276 | */ | |
3d632c3f SH |
3277 | static int bond_netdev_event(struct notifier_block *this, |
3278 | unsigned long event, void *ptr) | |
1da177e4 LT |
3279 | { |
3280 | struct net_device *event_dev = (struct net_device *)ptr; | |
3281 | ||
5a03cdb7 | 3282 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3283 | event_dev ? event_dev->name : "None", |
3284 | event); | |
1da177e4 | 3285 | |
0b680e75 JV |
3286 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3287 | return NOTIFY_DONE; | |
3288 | ||
1da177e4 | 3289 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3290 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3291 | return bond_master_netdev_event(event, event_dev); |
3292 | } | |
3293 | ||
3294 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3295 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3296 | return bond_slave_netdev_event(event, event_dev); |
3297 | } | |
3298 | ||
3299 | return NOTIFY_DONE; | |
3300 | } | |
3301 | ||
3302 | static struct notifier_block bond_netdev_notifier = { | |
3303 | .notifier_call = bond_netdev_event, | |
3304 | }; | |
3305 | ||
169a3e66 JV |
3306 | /*---------------------------- Hashing Policies -----------------------------*/ |
3307 | ||
6b923cb7 JE |
3308 | /* |
3309 | * Hash for the output device based upon layer 2 data | |
3310 | */ | |
3311 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) | |
3312 | { | |
3313 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3314 | ||
3315 | if (skb_headlen(skb) >= offsetof(struct ethhdr, h_proto)) | |
3316 | return (data->h_dest[5] ^ data->h_source[5]) % count; | |
3317 | ||
3318 | return 0; | |
3319 | } | |
3320 | ||
6f6652be JV |
3321 | /* |
3322 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
6b923cb7 | 3323 | * the packet is not IP, fall back on bond_xmit_hash_policy_l2() |
6f6652be | 3324 | */ |
a361c83c | 3325 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be | 3326 | { |
4394542c ED |
3327 | const struct ethhdr *data; |
3328 | const struct iphdr *iph; | |
3329 | const struct ipv6hdr *ipv6h; | |
6b923cb7 | 3330 | u32 v6hash; |
4394542c | 3331 | const __be32 *s, *d; |
6b923cb7 JE |
3332 | |
3333 | if (skb->protocol == htons(ETH_P_IP) && | |
4394542c | 3334 | pskb_network_may_pull(skb, sizeof(*iph))) { |
6b923cb7 | 3335 | iph = ip_hdr(skb); |
4394542c | 3336 | data = (struct ethhdr *)skb->data; |
6f6652be | 3337 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3338 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6b923cb7 | 3339 | } else if (skb->protocol == htons(ETH_P_IPV6) && |
4394542c | 3340 | pskb_network_may_pull(skb, sizeof(*ipv6h))) { |
6b923cb7 | 3341 | ipv6h = ipv6_hdr(skb); |
4394542c | 3342 | data = (struct ethhdr *)skb->data; |
6b923cb7 JE |
3343 | s = &ipv6h->saddr.s6_addr32[0]; |
3344 | d = &ipv6h->daddr.s6_addr32[0]; | |
3345 | v6hash = (s[1] ^ d[1]) ^ (s[2] ^ d[2]) ^ (s[3] ^ d[3]); | |
3346 | v6hash ^= (v6hash >> 24) ^ (v6hash >> 16) ^ (v6hash >> 8); | |
3347 | return (v6hash ^ data->h_dest[5] ^ data->h_source[5]) % count; | |
6f6652be JV |
3348 | } |
3349 | ||
6b923cb7 | 3350 | return bond_xmit_hash_policy_l2(skb, count); |
6f6652be JV |
3351 | } |
3352 | ||
169a3e66 | 3353 | /* |
59c51591 | 3354 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 | 3355 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
6b923cb7 | 3356 | * altogether not IP, fall back on bond_xmit_hash_policy_l2() |
169a3e66 | 3357 | */ |
a361c83c | 3358 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 | 3359 | { |
6b923cb7 | 3360 | u32 layer4_xor = 0; |
4394542c ED |
3361 | const struct iphdr *iph; |
3362 | const struct ipv6hdr *ipv6h; | |
3363 | const __be32 *s, *d; | |
3364 | const __be16 *l4 = NULL; | |
3365 | __be16 _l4[2]; | |
3366 | int noff = skb_network_offset(skb); | |
3367 | int poff; | |
169a3e66 | 3368 | |
6b923cb7 | 3369 | if (skb->protocol == htons(ETH_P_IP) && |
4394542c | 3370 | pskb_may_pull(skb, noff + sizeof(*iph))) { |
6b923cb7 | 3371 | iph = ip_hdr(skb); |
4394542c ED |
3372 | poff = proto_ports_offset(iph->protocol); |
3373 | ||
3374 | if (!ip_is_fragment(iph) && poff >= 0) { | |
3375 | l4 = skb_header_pointer(skb, noff + (iph->ihl << 2) + poff, | |
3376 | sizeof(_l4), &_l4); | |
3377 | if (l4) | |
3378 | layer4_xor = ntohs(l4[0] ^ l4[1]); | |
169a3e66 JV |
3379 | } |
3380 | return (layer4_xor ^ | |
3381 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
6b923cb7 | 3382 | } else if (skb->protocol == htons(ETH_P_IPV6) && |
4394542c | 3383 | pskb_may_pull(skb, noff + sizeof(*ipv6h))) { |
6b923cb7 | 3384 | ipv6h = ipv6_hdr(skb); |
4394542c ED |
3385 | poff = proto_ports_offset(ipv6h->nexthdr); |
3386 | if (poff >= 0) { | |
3387 | l4 = skb_header_pointer(skb, noff + sizeof(*ipv6h) + poff, | |
3388 | sizeof(_l4), &_l4); | |
3389 | if (l4) | |
3390 | layer4_xor = ntohs(l4[0] ^ l4[1]); | |
6b923cb7 JE |
3391 | } |
3392 | s = &ipv6h->saddr.s6_addr32[0]; | |
3393 | d = &ipv6h->daddr.s6_addr32[0]; | |
3394 | layer4_xor ^= (s[1] ^ d[1]) ^ (s[2] ^ d[2]) ^ (s[3] ^ d[3]); | |
3395 | layer4_xor ^= (layer4_xor >> 24) ^ (layer4_xor >> 16) ^ | |
3396 | (layer4_xor >> 8); | |
3397 | return layer4_xor % count; | |
169a3e66 JV |
3398 | } |
3399 | ||
6b923cb7 | 3400 | return bond_xmit_hash_policy_l2(skb, count); |
169a3e66 JV |
3401 | } |
3402 | ||
1da177e4 LT |
3403 | /*-------------------------- Device entry points ----------------------------*/ |
3404 | ||
fbb0c41b | 3405 | static void bond_work_init_all(struct bonding *bond) |
3406 | { | |
3407 | INIT_DELAYED_WORK(&bond->mcast_work, | |
3408 | bond_resend_igmp_join_requests_delayed); | |
3409 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); | |
3410 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); | |
3411 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3412 | INIT_DELAYED_WORK(&bond->arp_work, bond_activebackup_arp_mon); | |
3413 | else | |
3414 | INIT_DELAYED_WORK(&bond->arp_work, bond_loadbalance_arp_mon); | |
3415 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); | |
3416 | } | |
3417 | ||
3418 | static void bond_work_cancel_all(struct bonding *bond) | |
3419 | { | |
3420 | cancel_delayed_work_sync(&bond->mii_work); | |
3421 | cancel_delayed_work_sync(&bond->arp_work); | |
3422 | cancel_delayed_work_sync(&bond->alb_work); | |
3423 | cancel_delayed_work_sync(&bond->ad_work); | |
3424 | cancel_delayed_work_sync(&bond->mcast_work); | |
3425 | } | |
3426 | ||
1da177e4 LT |
3427 | static int bond_open(struct net_device *bond_dev) |
3428 | { | |
454d7c9b | 3429 | struct bonding *bond = netdev_priv(bond_dev); |
ba3211cc PP |
3430 | struct slave *slave; |
3431 | int i; | |
1da177e4 | 3432 | |
ba3211cc PP |
3433 | /* reset slave->backup and slave->inactive */ |
3434 | read_lock(&bond->lock); | |
3435 | if (bond->slave_cnt > 0) { | |
3436 | read_lock(&bond->curr_slave_lock); | |
3437 | bond_for_each_slave(bond, slave, i) { | |
3438 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3439 | && (slave != bond->curr_active_slave)) { | |
3440 | bond_set_slave_inactive_flags(slave); | |
3441 | } else { | |
3442 | bond_set_slave_active_flags(slave); | |
3443 | } | |
3444 | } | |
3445 | read_unlock(&bond->curr_slave_lock); | |
3446 | } | |
3447 | read_unlock(&bond->lock); | |
3448 | ||
fbb0c41b | 3449 | bond_work_init_all(bond); |
5a37e8ca | 3450 | |
58402054 | 3451 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3452 | /* bond_alb_initialize must be called before the timer |
3453 | * is started. | |
3454 | */ | |
fbb0c41b | 3455 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) |
b473946a | 3456 | return -ENOMEM; |
1b76b316 | 3457 | queue_delayed_work(bond->wq, &bond->alb_work, 0); |
1da177e4 LT |
3458 | } |
3459 | ||
fbb0c41b | 3460 | if (bond->params.miimon) /* link check interval, in milliseconds. */ |
1b76b316 | 3461 | queue_delayed_work(bond->wq, &bond->mii_work, 0); |
1da177e4 LT |
3462 | |
3463 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3464 | queue_delayed_work(bond->wq, &bond->arp_work, 0); |
f5b2b966 | 3465 | if (bond->params.arp_validate) |
3aba891d | 3466 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3467 | } |
3468 | ||
3469 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1b76b316 | 3470 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3471 | /* register to receive LACPDUs */ |
3aba891d | 3472 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3473 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3474 | } |
3475 | ||
3476 | return 0; | |
3477 | } | |
3478 | ||
3479 | static int bond_close(struct net_device *bond_dev) | |
3480 | { | |
454d7c9b | 3481 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3482 | |
1da177e4 | 3483 | write_lock_bh(&bond->lock); |
ad246c99 | 3484 | bond->send_peer_notif = 0; |
1da177e4 LT |
3485 | write_unlock_bh(&bond->lock); |
3486 | ||
fbb0c41b | 3487 | bond_work_cancel_all(bond); |
58402054 | 3488 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3489 | /* Must be called only after all |
3490 | * slaves have been released | |
3491 | */ | |
3492 | bond_alb_deinitialize(bond); | |
3493 | } | |
3aba891d | 3494 | bond->recv_probe = NULL; |
1da177e4 LT |
3495 | |
3496 | return 0; | |
3497 | } | |
3498 | ||
28172739 ED |
3499 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3500 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3501 | { |
454d7c9b | 3502 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3503 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3504 | struct slave *slave; |
3505 | int i; | |
3506 | ||
28172739 | 3507 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3508 | |
3509 | read_lock_bh(&bond->lock); | |
3510 | ||
3511 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3512 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3513 | dev_get_stats(slave->dev, &temp); |
3514 | ||
3515 | stats->rx_packets += sstats->rx_packets; | |
3516 | stats->rx_bytes += sstats->rx_bytes; | |
3517 | stats->rx_errors += sstats->rx_errors; | |
3518 | stats->rx_dropped += sstats->rx_dropped; | |
3519 | ||
3520 | stats->tx_packets += sstats->tx_packets; | |
3521 | stats->tx_bytes += sstats->tx_bytes; | |
3522 | stats->tx_errors += sstats->tx_errors; | |
3523 | stats->tx_dropped += sstats->tx_dropped; | |
3524 | ||
3525 | stats->multicast += sstats->multicast; | |
3526 | stats->collisions += sstats->collisions; | |
3527 | ||
3528 | stats->rx_length_errors += sstats->rx_length_errors; | |
3529 | stats->rx_over_errors += sstats->rx_over_errors; | |
3530 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3531 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3532 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3533 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3534 | ||
3535 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3536 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3537 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3538 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3539 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3540 | } |
3541 | ||
1da177e4 LT |
3542 | read_unlock_bh(&bond->lock); |
3543 | ||
3544 | return stats; | |
3545 | } | |
3546 | ||
3547 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3548 | { | |
3549 | struct net_device *slave_dev = NULL; | |
3550 | struct ifbond k_binfo; | |
3551 | struct ifbond __user *u_binfo = NULL; | |
3552 | struct ifslave k_sinfo; | |
3553 | struct ifslave __user *u_sinfo = NULL; | |
3554 | struct mii_ioctl_data *mii = NULL; | |
387ff911 | 3555 | struct net *net; |
1da177e4 LT |
3556 | int res = 0; |
3557 | ||
a4aee5c8 | 3558 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3559 | |
3560 | switch (cmd) { | |
1da177e4 LT |
3561 | case SIOCGMIIPHY: |
3562 | mii = if_mii(ifr); | |
3d632c3f | 3563 | if (!mii) |
1da177e4 | 3564 | return -EINVAL; |
3d632c3f | 3565 | |
1da177e4 LT |
3566 | mii->phy_id = 0; |
3567 | /* Fall Through */ | |
3568 | case SIOCGMIIREG: | |
3569 | /* | |
3570 | * We do this again just in case we were called by SIOCGMIIREG | |
3571 | * instead of SIOCGMIIPHY. | |
3572 | */ | |
3573 | mii = if_mii(ifr); | |
3d632c3f | 3574 | if (!mii) |
1da177e4 | 3575 | return -EINVAL; |
3d632c3f | 3576 | |
1da177e4 LT |
3577 | |
3578 | if (mii->reg_num == 1) { | |
454d7c9b | 3579 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3580 | mii->val_out = 0; |
6603a6f2 | 3581 | read_lock(&bond->lock); |
1da177e4 | 3582 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3583 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3584 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3585 | |
1da177e4 | 3586 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3587 | read_unlock(&bond->lock); |
1da177e4 LT |
3588 | } |
3589 | ||
3590 | return 0; | |
3591 | case BOND_INFO_QUERY_OLD: | |
3592 | case SIOCBONDINFOQUERY: | |
3593 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3594 | ||
3d632c3f | 3595 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3596 | return -EFAULT; |
1da177e4 LT |
3597 | |
3598 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3599 | if (res == 0 && |
3600 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3601 | return -EFAULT; | |
1da177e4 LT |
3602 | |
3603 | return res; | |
3604 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3605 | case SIOCBONDSLAVEINFOQUERY: | |
3606 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3607 | ||
3d632c3f | 3608 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3609 | return -EFAULT; |
1da177e4 LT |
3610 | |
3611 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3612 | if (res == 0 && |
3613 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3614 | return -EFAULT; | |
1da177e4 LT |
3615 | |
3616 | return res; | |
3617 | default: | |
3618 | /* Go on */ | |
3619 | break; | |
3620 | } | |
3621 | ||
387ff911 G |
3622 | net = dev_net(bond_dev); |
3623 | ||
3624 | if (!ns_capable(net->user_ns, CAP_NET_ADMIN)) | |
1da177e4 | 3625 | return -EPERM; |
1da177e4 | 3626 | |
387ff911 | 3627 | slave_dev = dev_get_by_name(net, ifr->ifr_slave); |
1da177e4 | 3628 | |
a4aee5c8 | 3629 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3630 | |
3d632c3f | 3631 | if (!slave_dev) |
1da177e4 | 3632 | res = -ENODEV; |
3d632c3f | 3633 | else { |
a4aee5c8 | 3634 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3635 | switch (cmd) { |
3636 | case BOND_ENSLAVE_OLD: | |
3637 | case SIOCBONDENSLAVE: | |
3638 | res = bond_enslave(bond_dev, slave_dev); | |
3639 | break; | |
3640 | case BOND_RELEASE_OLD: | |
3641 | case SIOCBONDRELEASE: | |
3642 | res = bond_release(bond_dev, slave_dev); | |
3643 | break; | |
3644 | case BOND_SETHWADDR_OLD: | |
3645 | case SIOCBONDSETHWADDR: | |
409cc1f8 JP |
3646 | bond_set_dev_addr(bond_dev, slave_dev); |
3647 | res = 0; | |
1da177e4 LT |
3648 | break; |
3649 | case BOND_CHANGE_ACTIVE_OLD: | |
3650 | case SIOCBONDCHANGEACTIVE: | |
3651 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3652 | break; | |
3653 | default: | |
3654 | res = -EOPNOTSUPP; | |
3655 | } | |
3656 | ||
3657 | dev_put(slave_dev); | |
3658 | } | |
3659 | ||
1da177e4 LT |
3660 | return res; |
3661 | } | |
3662 | ||
22bedad3 JP |
3663 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3664 | struct netdev_hw_addr_list *list, | |
3665 | int addrlen) | |
3666 | { | |
3667 | struct netdev_hw_addr *ha; | |
3668 | ||
3669 | netdev_hw_addr_list_for_each(ha, list) | |
3670 | if (!memcmp(ha->addr, addr, addrlen)) | |
3671 | return true; | |
3672 | ||
3673 | return false; | |
3674 | } | |
3675 | ||
d03462b9 | 3676 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3677 | { |
454d7c9b | 3678 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3679 | |
d03462b9 JP |
3680 | if (change & IFF_PROMISC) |
3681 | bond_set_promiscuity(bond, | |
3682 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3683 | |
d03462b9 JP |
3684 | if (change & IFF_ALLMULTI) |
3685 | bond_set_allmulti(bond, | |
3686 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3687 | } | |
1da177e4 | 3688 | |
d03462b9 JP |
3689 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3690 | { | |
3691 | struct bonding *bond = netdev_priv(bond_dev); | |
3692 | struct netdev_hw_addr *ha; | |
3693 | bool found; | |
1da177e4 | 3694 | |
80ee5ad2 JV |
3695 | read_lock(&bond->lock); |
3696 | ||
1da177e4 | 3697 | /* looking for addresses to add to slaves' mc list */ |
22bedad3 JP |
3698 | netdev_for_each_mc_addr(ha, bond_dev) { |
3699 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3700 | bond_dev->addr_len); | |
3701 | if (!found) | |
3702 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3703 | } |
3704 | ||
3705 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3706 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3707 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3708 | bond_dev->addr_len); | |
3709 | if (!found) | |
3710 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3711 | } |
3712 | ||
3713 | /* save master's multicast list */ | |
22bedad3 JP |
3714 | __hw_addr_flush(&bond->mc_list); |
3715 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3716 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3717 | |
80ee5ad2 | 3718 | read_unlock(&bond->lock); |
1da177e4 LT |
3719 | } |
3720 | ||
234bcf8a | 3721 | static int bond_neigh_init(struct neighbour *n) |
00829823 | 3722 | { |
234bcf8a | 3723 | struct bonding *bond = netdev_priv(n->dev); |
00829823 | 3724 | struct slave *slave = bond->first_slave; |
234bcf8a SP |
3725 | const struct net_device_ops *slave_ops; |
3726 | struct neigh_parms parms; | |
3727 | int ret; | |
3728 | ||
3729 | if (!slave) | |
3730 | return 0; | |
3731 | ||
3732 | slave_ops = slave->dev->netdev_ops; | |
3733 | ||
3734 | if (!slave_ops->ndo_neigh_setup) | |
3735 | return 0; | |
3736 | ||
3737 | parms.neigh_setup = NULL; | |
3738 | parms.neigh_cleanup = NULL; | |
3739 | ret = slave_ops->ndo_neigh_setup(slave->dev, &parms); | |
3740 | if (ret) | |
3741 | return ret; | |
3742 | ||
3743 | /* | |
3744 | * Assign slave's neigh_cleanup to neighbour in case cleanup is called | |
3745 | * after the last slave has been detached. Assumes that all slaves | |
3746 | * utilize the same neigh_cleanup (true at this writing as only user | |
3747 | * is ipoib). | |
3748 | */ | |
3749 | n->parms->neigh_cleanup = parms.neigh_cleanup; | |
3750 | ||
3751 | if (!parms.neigh_setup) | |
3752 | return 0; | |
3753 | ||
3754 | return parms.neigh_setup(n); | |
3755 | } | |
3756 | ||
3757 | /* | |
3758 | * The bonding ndo_neigh_setup is called at init time beofre any | |
3759 | * slave exists. So we must declare proxy setup function which will | |
3760 | * be used at run time to resolve the actual slave neigh param setup. | |
3761 | */ | |
3762 | static int bond_neigh_setup(struct net_device *dev, | |
3763 | struct neigh_parms *parms) | |
3764 | { | |
3765 | parms->neigh_setup = bond_neigh_init; | |
00829823 | 3766 | |
00829823 SH |
3767 | return 0; |
3768 | } | |
3769 | ||
1da177e4 LT |
3770 | /* |
3771 | * Change the MTU of all of a master's slaves to match the master | |
3772 | */ | |
3773 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3774 | { | |
454d7c9b | 3775 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3776 | struct slave *slave, *stop_at; |
3777 | int res = 0; | |
3778 | int i; | |
3779 | ||
5a03cdb7 | 3780 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3781 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3782 | |
3783 | /* Can't hold bond->lock with bh disabled here since | |
3784 | * some base drivers panic. On the other hand we can't | |
3785 | * hold bond->lock without bh disabled because we'll | |
3786 | * deadlock. The only solution is to rely on the fact | |
3787 | * that we're under rtnl_lock here, and the slaves | |
3788 | * list won't change. This doesn't solve the problem | |
3789 | * of setting the slave's MTU while it is | |
3790 | * transmitting, but the assumption is that the base | |
3791 | * driver can handle that. | |
3792 | * | |
3793 | * TODO: figure out a way to safely iterate the slaves | |
3794 | * list, but without holding a lock around the actual | |
3795 | * call to the base driver. | |
3796 | */ | |
3797 | ||
3798 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3799 | pr_debug("s %p s->p %p c_m %p\n", |
3800 | slave, | |
3801 | slave->prev, | |
3802 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3803 | |
1da177e4 LT |
3804 | res = dev_set_mtu(slave->dev, new_mtu); |
3805 | ||
3806 | if (res) { | |
3807 | /* If we failed to set the slave's mtu to the new value | |
3808 | * we must abort the operation even in ACTIVE_BACKUP | |
3809 | * mode, because if we allow the backup slaves to have | |
3810 | * different mtu values than the active slave we'll | |
3811 | * need to change their mtu when doing a failover. That | |
3812 | * means changing their mtu from timer context, which | |
3813 | * is probably not a good idea. | |
3814 | */ | |
5a03cdb7 | 3815 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3816 | goto unwind; |
3817 | } | |
3818 | } | |
3819 | ||
3820 | bond_dev->mtu = new_mtu; | |
3821 | ||
3822 | return 0; | |
3823 | ||
3824 | unwind: | |
3825 | /* unwind from head to the slave that failed */ | |
3826 | stop_at = slave; | |
3827 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3828 | int tmp_res; | |
3829 | ||
3830 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3831 | if (tmp_res) { | |
a4aee5c8 JP |
3832 | pr_debug("unwind err %d dev %s\n", |
3833 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3834 | } |
3835 | } | |
3836 | ||
3837 | return res; | |
3838 | } | |
3839 | ||
3840 | /* | |
3841 | * Change HW address | |
3842 | * | |
3843 | * Note that many devices must be down to change the HW address, and | |
3844 | * downing the master releases all slaves. We can make bonds full of | |
3845 | * bonding devices to test this, however. | |
3846 | */ | |
3847 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3848 | { | |
454d7c9b | 3849 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3850 | struct sockaddr *sa = addr, tmp_sa; |
3851 | struct slave *slave, *stop_at; | |
3852 | int res = 0; | |
3853 | int i; | |
3854 | ||
eb7cc59a SH |
3855 | if (bond->params.mode == BOND_MODE_ALB) |
3856 | return bond_alb_set_mac_address(bond_dev, addr); | |
3857 | ||
3858 | ||
a4aee5c8 JP |
3859 | pr_debug("bond=%p, name=%s\n", |
3860 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3861 | |
dd957c57 | 3862 | /* |
3915c1e8 JV |
3863 | * If fail_over_mac is set to active, do nothing and return |
3864 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3865 | */ |
3915c1e8 | 3866 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3867 | return 0; |
2ab82852 | 3868 | |
3d632c3f | 3869 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3870 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3871 | |
3872 | /* Can't hold bond->lock with bh disabled here since | |
3873 | * some base drivers panic. On the other hand we can't | |
3874 | * hold bond->lock without bh disabled because we'll | |
3875 | * deadlock. The only solution is to rely on the fact | |
3876 | * that we're under rtnl_lock here, and the slaves | |
3877 | * list won't change. This doesn't solve the problem | |
3878 | * of setting the slave's hw address while it is | |
3879 | * transmitting, but the assumption is that the base | |
3880 | * driver can handle that. | |
3881 | * | |
3882 | * TODO: figure out a way to safely iterate the slaves | |
3883 | * list, but without holding a lock around the actual | |
3884 | * call to the base driver. | |
3885 | */ | |
3886 | ||
3887 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3888 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3889 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3890 | |
eb7cc59a | 3891 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3892 | res = -EOPNOTSUPP; |
5a03cdb7 | 3893 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3894 | goto unwind; |
3895 | } | |
3896 | ||
3897 | res = dev_set_mac_address(slave->dev, addr); | |
3898 | if (res) { | |
3899 | /* TODO: consider downing the slave | |
3900 | * and retry ? | |
3901 | * User should expect communications | |
3902 | * breakage anyway until ARP finish | |
3903 | * updating, so... | |
3904 | */ | |
5a03cdb7 | 3905 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3906 | goto unwind; |
3907 | } | |
3908 | } | |
3909 | ||
3910 | /* success */ | |
3911 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3912 | return 0; | |
3913 | ||
3914 | unwind: | |
3915 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3916 | tmp_sa.sa_family = bond_dev->type; | |
3917 | ||
3918 | /* unwind from head to the slave that failed */ | |
3919 | stop_at = slave; | |
3920 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3921 | int tmp_res; | |
3922 | ||
3923 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3924 | if (tmp_res) { | |
a4aee5c8 JP |
3925 | pr_debug("unwind err %d dev %s\n", |
3926 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3927 | } |
3928 | } | |
3929 | ||
3930 | return res; | |
3931 | } | |
3932 | ||
3933 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3934 | { | |
454d7c9b | 3935 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3936 | struct slave *slave, *start_at; |
cf5f9044 | 3937 | int i, slave_no, res = 1; |
a2fd940f | 3938 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3939 | |
cf5f9044 | 3940 | /* |
a2fd940f AG |
3941 | * Start with the curr_active_slave that joined the bond as the |
3942 | * default for sending IGMP traffic. For failover purposes one | |
3943 | * needs to maintain some consistency for the interface that will | |
3944 | * send the join/membership reports. The curr_active_slave found | |
3945 | * will send all of this type of traffic. | |
cf5f9044 | 3946 | */ |
00ae7028 | 3947 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3948 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3949 | |
a2fd940f AG |
3950 | read_lock(&bond->curr_slave_lock); |
3951 | slave = bond->curr_active_slave; | |
3952 | read_unlock(&bond->curr_slave_lock); | |
3953 | ||
3954 | if (!slave) | |
3955 | goto out; | |
3956 | } else { | |
3957 | /* | |
3958 | * Concurrent TX may collide on rr_tx_counter; we accept | |
3959 | * that as being rare enough not to justify using an | |
3960 | * atomic op here. | |
3961 | */ | |
3962 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
3963 | ||
3964 | bond_for_each_slave(bond, slave, i) { | |
3965 | slave_no--; | |
3966 | if (slave_no < 0) | |
3967 | break; | |
3968 | } | |
1da177e4 LT |
3969 | } |
3970 | ||
cf5f9044 | 3971 | start_at = slave; |
1da177e4 LT |
3972 | bond_for_each_slave_from(bond, slave, i, start_at) { |
3973 | if (IS_UP(slave->dev) && | |
3974 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 3975 | bond_is_active_slave(slave)) { |
1da177e4 | 3976 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
3977 | break; |
3978 | } | |
3979 | } | |
3980 | ||
1da177e4 LT |
3981 | out: |
3982 | if (res) { | |
3983 | /* no suitable interface, frame not sent */ | |
04502430 | 3984 | kfree_skb(skb); |
1da177e4 | 3985 | } |
0693e88e | 3986 | |
ec634fe3 | 3987 | return NETDEV_TX_OK; |
1da177e4 LT |
3988 | } |
3989 | ||
075897ce | 3990 | |
1da177e4 LT |
3991 | /* |
3992 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3993 | * the bond has a usable interface. | |
3994 | */ | |
3995 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3996 | { | |
454d7c9b | 3997 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3998 | int res = 1; |
3999 | ||
1da177e4 LT |
4000 | read_lock(&bond->curr_slave_lock); |
4001 | ||
0693e88e MM |
4002 | if (bond->curr_active_slave) |
4003 | res = bond_dev_queue_xmit(bond, skb, | |
4004 | bond->curr_active_slave->dev); | |
1da177e4 | 4005 | |
04502430 ED |
4006 | read_unlock(&bond->curr_slave_lock); |
4007 | ||
3d632c3f | 4008 | if (res) |
1da177e4 | 4009 | /* no suitable interface, frame not sent */ |
04502430 | 4010 | kfree_skb(skb); |
0693e88e | 4011 | |
ec634fe3 | 4012 | return NETDEV_TX_OK; |
1da177e4 LT |
4013 | } |
4014 | ||
4015 | /* | |
169a3e66 JV |
4016 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4017 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4018 | * find the next active slave. | |
1da177e4 LT |
4019 | */ |
4020 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4021 | { | |
454d7c9b | 4022 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4023 | struct slave *slave, *start_at; |
4024 | int slave_no; | |
4025 | int i; | |
4026 | int res = 1; | |
4027 | ||
a361c83c | 4028 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4029 | |
4030 | bond_for_each_slave(bond, slave, i) { | |
4031 | slave_no--; | |
3d632c3f | 4032 | if (slave_no < 0) |
1da177e4 | 4033 | break; |
1da177e4 LT |
4034 | } |
4035 | ||
4036 | start_at = slave; | |
4037 | ||
4038 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4039 | if (IS_UP(slave->dev) && | |
4040 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4041 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4042 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4043 | break; | |
4044 | } | |
4045 | } | |
4046 | ||
1da177e4 LT |
4047 | if (res) { |
4048 | /* no suitable interface, frame not sent */ | |
04502430 | 4049 | kfree_skb(skb); |
1da177e4 | 4050 | } |
0693e88e | 4051 | |
ec634fe3 | 4052 | return NETDEV_TX_OK; |
1da177e4 LT |
4053 | } |
4054 | ||
4055 | /* | |
4056 | * in broadcast mode, we send everything to all usable interfaces. | |
4057 | */ | |
4058 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4059 | { | |
454d7c9b | 4060 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4061 | struct slave *slave, *start_at; |
4062 | struct net_device *tx_dev = NULL; | |
4063 | int i; | |
4064 | int res = 1; | |
4065 | ||
1da177e4 LT |
4066 | read_lock(&bond->curr_slave_lock); |
4067 | start_at = bond->curr_active_slave; | |
4068 | read_unlock(&bond->curr_slave_lock); | |
4069 | ||
3d632c3f | 4070 | if (!start_at) |
1da177e4 | 4071 | goto out; |
1da177e4 LT |
4072 | |
4073 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4074 | if (IS_UP(slave->dev) && | |
4075 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4076 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4077 | if (tx_dev) { |
4078 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4079 | if (!skb2) { | |
a4aee5c8 | 4080 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4081 | bond_dev->name); |
1da177e4 LT |
4082 | continue; |
4083 | } | |
4084 | ||
4085 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4086 | if (res) { | |
04502430 | 4087 | kfree_skb(skb2); |
1da177e4 LT |
4088 | continue; |
4089 | } | |
4090 | } | |
4091 | tx_dev = slave->dev; | |
4092 | } | |
4093 | } | |
4094 | ||
3d632c3f | 4095 | if (tx_dev) |
1da177e4 | 4096 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4097 | |
4098 | out: | |
3d632c3f | 4099 | if (res) |
1da177e4 | 4100 | /* no suitable interface, frame not sent */ |
04502430 | 4101 | kfree_skb(skb); |
3d632c3f | 4102 | |
1da177e4 | 4103 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4104 | return NETDEV_TX_OK; |
1da177e4 LT |
4105 | } |
4106 | ||
4107 | /*------------------------- Device initialization ---------------------------*/ | |
4108 | ||
6f6652be JV |
4109 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4110 | { | |
4111 | switch (bond->params.xmit_policy) { | |
4112 | case BOND_XMIT_POLICY_LAYER23: | |
4113 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4114 | break; | |
4115 | case BOND_XMIT_POLICY_LAYER34: | |
4116 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4117 | break; | |
4118 | case BOND_XMIT_POLICY_LAYER2: | |
4119 | default: | |
4120 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4121 | break; | |
4122 | } | |
4123 | } | |
4124 | ||
bb1d9123 AG |
4125 | /* |
4126 | * Lookup the slave that corresponds to a qid | |
4127 | */ | |
4128 | static inline int bond_slave_override(struct bonding *bond, | |
4129 | struct sk_buff *skb) | |
4130 | { | |
4131 | int i, res = 1; | |
4132 | struct slave *slave = NULL; | |
4133 | struct slave *check_slave; | |
4134 | ||
0693e88e MM |
4135 | if (!skb->queue_mapping) |
4136 | return 1; | |
bb1d9123 AG |
4137 | |
4138 | /* Find out if any slaves have the same mapping as this skb. */ | |
4139 | bond_for_each_slave(bond, check_slave, i) { | |
4140 | if (check_slave->queue_id == skb->queue_mapping) { | |
4141 | slave = check_slave; | |
4142 | break; | |
4143 | } | |
4144 | } | |
4145 | ||
4146 | /* If the slave isn't UP, use default transmit policy. */ | |
4147 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4148 | (slave->link == BOND_LINK_UP)) { | |
4149 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4150 | } | |
4151 | ||
bb1d9123 AG |
4152 | return res; |
4153 | } | |
4154 | ||
374eeb5a | 4155 | |
bb1d9123 AG |
4156 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4157 | { | |
4158 | /* | |
4159 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4160 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4161 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4162 | * way down to the bonding driver. | |
4163 | */ | |
fd0e435b PO |
4164 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4165 | ||
374eeb5a NH |
4166 | /* |
4167 | * Save the original txq to restore before passing to the driver | |
4168 | */ | |
df4ab5b3 | 4169 | qdisc_skb_cb(skb)->slave_dev_queue_mapping = skb->queue_mapping; |
374eeb5a | 4170 | |
fd0e435b | 4171 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4172 | do { |
fd0e435b | 4173 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4174 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4175 | } |
4176 | return txq; | |
bb1d9123 AG |
4177 | } |
4178 | ||
0693e88e | 4179 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4180 | { |
bb1d9123 AG |
4181 | struct bonding *bond = netdev_priv(dev); |
4182 | ||
4183 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4184 | if (!bond_slave_override(bond, skb)) | |
4185 | return NETDEV_TX_OK; | |
4186 | } | |
00829823 SH |
4187 | |
4188 | switch (bond->params.mode) { | |
4189 | case BOND_MODE_ROUNDROBIN: | |
4190 | return bond_xmit_roundrobin(skb, dev); | |
4191 | case BOND_MODE_ACTIVEBACKUP: | |
4192 | return bond_xmit_activebackup(skb, dev); | |
4193 | case BOND_MODE_XOR: | |
4194 | return bond_xmit_xor(skb, dev); | |
4195 | case BOND_MODE_BROADCAST: | |
4196 | return bond_xmit_broadcast(skb, dev); | |
4197 | case BOND_MODE_8023AD: | |
4198 | return bond_3ad_xmit_xor(skb, dev); | |
4199 | case BOND_MODE_ALB: | |
4200 | case BOND_MODE_TLB: | |
4201 | return bond_alb_xmit(skb, dev); | |
4202 | default: | |
4203 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4204 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4205 | dev->name, bond->params.mode); | |
00829823 | 4206 | WARN_ON_ONCE(1); |
04502430 | 4207 | kfree_skb(skb); |
00829823 SH |
4208 | return NETDEV_TX_OK; |
4209 | } | |
4210 | } | |
4211 | ||
0693e88e MM |
4212 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4213 | { | |
4214 | struct bonding *bond = netdev_priv(dev); | |
4215 | netdev_tx_t ret = NETDEV_TX_OK; | |
4216 | ||
4217 | /* | |
4218 | * If we risk deadlock from transmitting this in the | |
4219 | * netpoll path, tell netpoll to queue the frame for later tx | |
4220 | */ | |
4221 | if (is_netpoll_tx_blocked(dev)) | |
4222 | return NETDEV_TX_BUSY; | |
4223 | ||
4224 | read_lock(&bond->lock); | |
4225 | ||
4226 | if (bond->slave_cnt) | |
4227 | ret = __bond_start_xmit(skb, dev); | |
4228 | else | |
04502430 | 4229 | kfree_skb(skb); |
0693e88e MM |
4230 | |
4231 | read_unlock(&bond->lock); | |
4232 | ||
4233 | return ret; | |
4234 | } | |
00829823 | 4235 | |
1da177e4 LT |
4236 | /* |
4237 | * set bond mode specific net device operations | |
4238 | */ | |
a77b5325 | 4239 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4240 | { |
169a3e66 JV |
4241 | struct net_device *bond_dev = bond->dev; |
4242 | ||
1da177e4 LT |
4243 | switch (mode) { |
4244 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4245 | break; |
4246 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4247 | break; |
4248 | case BOND_MODE_XOR: | |
6f6652be | 4249 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4250 | break; |
4251 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4252 | break; |
4253 | case BOND_MODE_8023AD: | |
6f6652be | 4254 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4255 | break; |
1da177e4 | 4256 | case BOND_MODE_ALB: |
8f903c70 JV |
4257 | /* FALLTHRU */ |
4258 | case BOND_MODE_TLB: | |
1da177e4 LT |
4259 | break; |
4260 | default: | |
4261 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4262 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4263 | bond_dev->name, mode); | |
1da177e4 LT |
4264 | break; |
4265 | } | |
4266 | } | |
4267 | ||
bb5b052f AG |
4268 | static int bond_ethtool_get_settings(struct net_device *bond_dev, |
4269 | struct ethtool_cmd *ecmd) | |
4270 | { | |
4271 | struct bonding *bond = netdev_priv(bond_dev); | |
4272 | struct slave *slave; | |
4273 | int i; | |
4274 | unsigned long speed = 0; | |
4275 | ||
4276 | ecmd->duplex = DUPLEX_UNKNOWN; | |
4277 | ecmd->port = PORT_OTHER; | |
4278 | ||
4279 | /* Since SLAVE_IS_OK returns false for all inactive or down slaves, we | |
4280 | * do not need to check mode. Though link speed might not represent | |
4281 | * the true receive or transmit bandwidth (not all modes are symmetric) | |
4282 | * this is an accurate maximum. | |
4283 | */ | |
4284 | read_lock(&bond->lock); | |
4285 | bond_for_each_slave(bond, slave, i) { | |
4286 | if (SLAVE_IS_OK(slave)) { | |
4287 | if (slave->speed != SPEED_UNKNOWN) | |
4288 | speed += slave->speed; | |
4289 | if (ecmd->duplex == DUPLEX_UNKNOWN && | |
4290 | slave->duplex != DUPLEX_UNKNOWN) | |
4291 | ecmd->duplex = slave->duplex; | |
4292 | } | |
4293 | } | |
4294 | ethtool_cmd_speed_set(ecmd, speed ? : SPEED_UNKNOWN); | |
4295 | read_unlock(&bond->lock); | |
4296 | return 0; | |
4297 | } | |
4298 | ||
217df670 | 4299 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
7826d43f | 4300 | struct ethtool_drvinfo *drvinfo) |
217df670 | 4301 | { |
7826d43f JP |
4302 | strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver)); |
4303 | strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version)); | |
4304 | snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), "%d", | |
4305 | BOND_ABI_VERSION); | |
217df670 JV |
4306 | } |
4307 | ||
7282d491 | 4308 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4309 | .get_drvinfo = bond_ethtool_get_drvinfo, |
bb5b052f | 4310 | .get_settings = bond_ethtool_get_settings, |
fa53ebac | 4311 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4312 | }; |
4313 | ||
eb7cc59a | 4314 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4315 | .ndo_init = bond_init, |
9e71626c | 4316 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4317 | .ndo_open = bond_open, |
4318 | .ndo_stop = bond_close, | |
00829823 | 4319 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4320 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4321 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 4322 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 4323 | .ndo_change_rx_flags = bond_change_rx_flags, |
afc4b13d | 4324 | .ndo_set_rx_mode = bond_set_multicast_list, |
eb7cc59a | 4325 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 4326 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4327 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 4328 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 4329 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 4330 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4331 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4332 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4333 | .ndo_poll_controller = bond_poll_controller, | |
4334 | #endif | |
9232ecca JP |
4335 | .ndo_add_slave = bond_enslave, |
4336 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4337 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4338 | }; |
4339 | ||
b3f92b63 DG |
4340 | static const struct device_type bond_type = { |
4341 | .name = "bond", | |
4342 | }; | |
4343 | ||
9e2e61fb AW |
4344 | static void bond_destructor(struct net_device *bond_dev) |
4345 | { | |
4346 | struct bonding *bond = netdev_priv(bond_dev); | |
4347 | if (bond->wq) | |
4348 | destroy_workqueue(bond->wq); | |
4349 | free_netdev(bond_dev); | |
4350 | } | |
4351 | ||
181470fc | 4352 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4353 | { |
454d7c9b | 4354 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4355 | |
1da177e4 LT |
4356 | /* initialize rwlocks */ |
4357 | rwlock_init(&bond->lock); | |
4358 | rwlock_init(&bond->curr_slave_lock); | |
4359 | ||
d2991f75 | 4360 | bond->params = bonding_defaults; |
1da177e4 LT |
4361 | |
4362 | /* Initialize pointers */ | |
1da177e4 LT |
4363 | bond->dev = bond_dev; |
4364 | INIT_LIST_HEAD(&bond->vlan_list); | |
4365 | ||
4366 | /* Initialize the device entry points */ | |
181470fc | 4367 | ether_setup(bond_dev); |
eb7cc59a | 4368 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4369 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4370 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4371 | |
9e2e61fb | 4372 | bond_dev->destructor = bond_destructor; |
1da177e4 | 4373 | |
b3f92b63 DG |
4374 | SET_NETDEV_DEVTYPE(bond_dev, &bond_type); |
4375 | ||
1da177e4 LT |
4376 | /* Initialize the device options */ |
4377 | bond_dev->tx_queue_len = 0; | |
4378 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4379 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 4380 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 4381 | |
1da177e4 LT |
4382 | /* At first, we block adding VLANs. That's the only way to |
4383 | * prevent problems that occur when adding VLANs over an | |
4384 | * empty bond. The block will be removed once non-challenged | |
4385 | * slaves are enslaved. | |
4386 | */ | |
4387 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4388 | ||
932ff279 | 4389 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4390 | * transmitting */ |
4391 | bond_dev->features |= NETIF_F_LLTX; | |
4392 | ||
4393 | /* By default, we declare the bond to be fully | |
4394 | * VLAN hardware accelerated capable. Special | |
4395 | * care is taken in the various xmit functions | |
4396 | * when there are slaves that are not hw accel | |
4397 | * capable | |
4398 | */ | |
1da177e4 | 4399 | |
b2a103e6 | 4400 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
f646968f PM |
4401 | NETIF_F_HW_VLAN_CTAG_TX | |
4402 | NETIF_F_HW_VLAN_CTAG_RX | | |
4403 | NETIF_F_HW_VLAN_CTAG_FILTER; | |
b2a103e6 | 4404 | |
34324dc2 | 4405 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
b2a103e6 | 4406 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
4407 | } |
4408 | ||
c67dfb29 EB |
4409 | /* |
4410 | * Destroy a bonding device. | |
4411 | * Must be under rtnl_lock when this function is called. | |
4412 | */ | |
4413 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4414 | { |
454d7c9b | 4415 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4416 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4417 | |
f6dc31a8 WC |
4418 | bond_netpoll_cleanup(bond_dev); |
4419 | ||
c67dfb29 | 4420 | /* Release the bonded slaves */ |
0896341a | 4421 | while (bond->first_slave != NULL) |
4422 | __bond_release_one(bond_dev, bond->first_slave->dev, true); | |
4423 | pr_info("%s: released all slaves\n", bond_dev->name); | |
c67dfb29 | 4424 | |
a434e43f JV |
4425 | list_del(&bond->bond_list); |
4426 | ||
f073c7ca TI |
4427 | bond_debug_unregister(bond); |
4428 | ||
22bedad3 | 4429 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4430 | |
4431 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4432 | list_del(&vlan->vlan_list); | |
4433 | kfree(vlan); | |
4434 | } | |
a434e43f JV |
4435 | } |
4436 | ||
1da177e4 LT |
4437 | /*------------------------- Module initialization ---------------------------*/ |
4438 | ||
4439 | /* | |
4440 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4441 | * number of the mode or its string name. A bit complicated because |
4442 | * some mode names are substrings of other names, and calls from sysfs | |
4443 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4444 | */ |
325dcf7a | 4445 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4446 | { |
54b87323 | 4447 | int modeint = -1, i, rv; |
a42e534f | 4448 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4449 | |
a42e534f JV |
4450 | for (p = (char *)buf; *p; p++) |
4451 | if (!(isdigit(*p) || isspace(*p))) | |
4452 | break; | |
4453 | ||
4454 | if (*p) | |
ece95f7f | 4455 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4456 | else |
54b87323 | 4457 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4458 | |
4459 | if (!rv) | |
4460 | return -1; | |
1da177e4 LT |
4461 | |
4462 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4463 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4464 | return tbl[i].mode; |
4465 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4466 | return tbl[i].mode; |
1da177e4 LT |
4467 | } |
4468 | ||
4469 | return -1; | |
4470 | } | |
4471 | ||
4472 | static int bond_check_params(struct bond_params *params) | |
4473 | { | |
5a5c5fd4 | 4474 | int arp_validate_value, fail_over_mac_value, primary_reselect_value, i; |
f5b2b966 | 4475 | |
1da177e4 LT |
4476 | /* |
4477 | * Convert string parameters. | |
4478 | */ | |
4479 | if (mode) { | |
4480 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4481 | if (bond_mode == -1) { | |
a4aee5c8 | 4482 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4483 | mode == NULL ? "NULL" : mode); |
4484 | return -EINVAL; | |
4485 | } | |
4486 | } | |
4487 | ||
169a3e66 JV |
4488 | if (xmit_hash_policy) { |
4489 | if ((bond_mode != BOND_MODE_XOR) && | |
4490 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4491 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4492 | bond_mode_name(bond_mode)); |
4493 | } else { | |
4494 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4495 | xmit_hashtype_tbl); | |
4496 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4497 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4498 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4499 | xmit_hash_policy); |
4500 | return -EINVAL; | |
4501 | } | |
4502 | } | |
4503 | } | |
4504 | ||
1da177e4 LT |
4505 | if (lacp_rate) { |
4506 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4507 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4508 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4509 | } else { |
4510 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4511 | if (lacp_fast == -1) { | |
a4aee5c8 | 4512 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4513 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4514 | return -EINVAL; | |
4515 | } | |
4516 | } | |
4517 | } | |
4518 | ||
fd989c83 JV |
4519 | if (ad_select) { |
4520 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4521 | if (params->ad_select == -1) { | |
a4aee5c8 | 4522 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4523 | ad_select == NULL ? "NULL" : ad_select); |
4524 | return -EINVAL; | |
4525 | } | |
4526 | ||
4527 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4528 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4529 | } |
4530 | } else { | |
4531 | params->ad_select = BOND_AD_STABLE; | |
4532 | } | |
4533 | ||
f5841306 | 4534 | if (max_bonds < 0) { |
a4aee5c8 JP |
4535 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4536 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4537 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4538 | } | |
4539 | ||
4540 | if (miimon < 0) { | |
a4aee5c8 JP |
4541 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4542 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4543 | miimon = BOND_LINK_MON_INTERV; |
4544 | } | |
4545 | ||
4546 | if (updelay < 0) { | |
a4aee5c8 JP |
4547 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4548 | updelay, INT_MAX); | |
1da177e4 LT |
4549 | updelay = 0; |
4550 | } | |
4551 | ||
4552 | if (downdelay < 0) { | |
a4aee5c8 JP |
4553 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4554 | downdelay, INT_MAX); | |
1da177e4 LT |
4555 | downdelay = 0; |
4556 | } | |
4557 | ||
4558 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4559 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4560 | use_carrier); | |
1da177e4 LT |
4561 | use_carrier = 1; |
4562 | } | |
4563 | ||
ad246c99 BH |
4564 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4565 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4566 | num_peer_notif); | |
4567 | num_peer_notif = 1; | |
4568 | } | |
4569 | ||
1da177e4 LT |
4570 | /* reset values for 802.3ad */ |
4571 | if (bond_mode == BOND_MODE_8023AD) { | |
4572 | if (!miimon) { | |
a4aee5c8 | 4573 | 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 | 4574 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4575 | miimon = 100; |
4576 | } | |
4577 | } | |
4578 | ||
bb1d9123 AG |
4579 | if (tx_queues < 1 || tx_queues > 255) { |
4580 | pr_warning("Warning: tx_queues (%d) should be between " | |
4581 | "1 and 255, resetting to %d\n", | |
4582 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4583 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4584 | } | |
4585 | ||
ebd8e497 AG |
4586 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4587 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4588 | "not of valid value (0/1), so it was set to " | |
4589 | "0\n", all_slaves_active); | |
4590 | all_slaves_active = 0; | |
4591 | } | |
4592 | ||
c2952c31 FL |
4593 | if (resend_igmp < 0 || resend_igmp > 255) { |
4594 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4595 | "0 and 255, resetting to %d\n", | |
4596 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4597 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4598 | } | |
4599 | ||
1da177e4 LT |
4600 | /* reset values for TLB/ALB */ |
4601 | if ((bond_mode == BOND_MODE_TLB) || | |
4602 | (bond_mode == BOND_MODE_ALB)) { | |
4603 | if (!miimon) { | |
a4aee5c8 | 4604 | 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 | 4605 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4606 | miimon = 100; |
4607 | } | |
4608 | } | |
4609 | ||
4610 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4611 | 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", |
4612 | updelay); | |
1da177e4 LT |
4613 | } |
4614 | ||
4615 | if (!miimon) { | |
4616 | if (updelay || downdelay) { | |
4617 | /* just warn the user the up/down delay will have | |
4618 | * no effect since miimon is zero... | |
4619 | */ | |
a4aee5c8 JP |
4620 | 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", |
4621 | updelay, downdelay); | |
1da177e4 LT |
4622 | } |
4623 | } else { | |
4624 | /* don't allow arp monitoring */ | |
4625 | if (arp_interval) { | |
a4aee5c8 JP |
4626 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4627 | miimon, arp_interval); | |
1da177e4 LT |
4628 | arp_interval = 0; |
4629 | } | |
4630 | ||
4631 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4632 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4633 | updelay, miimon, | |
4634 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4635 | } |
4636 | ||
4637 | updelay /= miimon; | |
4638 | ||
4639 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4640 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4641 | downdelay, miimon, | |
4642 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4643 | } |
4644 | ||
4645 | downdelay /= miimon; | |
4646 | } | |
4647 | ||
4648 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4649 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4650 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4651 | arp_interval = BOND_LINK_ARP_INTERV; |
4652 | } | |
4653 | ||
5a5c5fd4 | 4654 | for (arp_ip_count = 0, i = 0; |
4655 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[i]; i++) { | |
1da177e4 LT |
4656 | /* not complete check, but should be good enough to |
4657 | catch mistakes */ | |
5a5c5fd4 | 4658 | __be32 ip = in_aton(arp_ip_target[i]); |
4659 | if (!isdigit(arp_ip_target[i][0]) || ip == 0 || | |
4660 | ip == htonl(INADDR_BROADCAST)) { | |
a4aee5c8 | 4661 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
5a5c5fd4 | 4662 | arp_ip_target[i]); |
1da177e4 LT |
4663 | arp_interval = 0; |
4664 | } else { | |
5a5c5fd4 | 4665 | arp_target[arp_ip_count++] = ip; |
1da177e4 LT |
4666 | } |
4667 | } | |
4668 | ||
4669 | if (arp_interval && !arp_ip_count) { | |
4670 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4671 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4672 | arp_interval); | |
1da177e4 LT |
4673 | arp_interval = 0; |
4674 | } | |
4675 | ||
f5b2b966 JV |
4676 | if (arp_validate) { |
4677 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4678 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4679 | return -EINVAL; |
4680 | } | |
4681 | if (!arp_interval) { | |
a4aee5c8 | 4682 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4683 | return -EINVAL; |
4684 | } | |
4685 | ||
4686 | arp_validate_value = bond_parse_parm(arp_validate, | |
4687 | arp_validate_tbl); | |
4688 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4689 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4690 | arp_validate == NULL ? "NULL" : arp_validate); |
4691 | return -EINVAL; | |
4692 | } | |
4693 | } else | |
4694 | arp_validate_value = 0; | |
4695 | ||
1da177e4 | 4696 | if (miimon) { |
a4aee5c8 | 4697 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 | 4698 | } else if (arp_interval) { |
a4aee5c8 JP |
4699 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4700 | arp_interval, | |
4701 | arp_validate_tbl[arp_validate_value].modename, | |
4702 | arp_ip_count); | |
1da177e4 LT |
4703 | |
4704 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4705 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4706 | |
e5e2a8fd | 4707 | pr_info("\n"); |
1da177e4 | 4708 | |
b8a9787e | 4709 | } else if (max_bonds) { |
1da177e4 LT |
4710 | /* miimon and arp_interval not set, we need one so things |
4711 | * work as expected, see bonding.txt for details | |
4712 | */ | |
b2730f4f | 4713 | 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 |
4714 | } |
4715 | ||
4716 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4717 | /* currently, using a primary only makes sense | |
4718 | * in active backup, TLB or ALB modes | |
4719 | */ | |
a4aee5c8 JP |
4720 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4721 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4722 | primary = NULL; |
4723 | } | |
4724 | ||
a549952a JP |
4725 | if (primary && primary_reselect) { |
4726 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4727 | pri_reselect_tbl); | |
4728 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4729 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4730 | primary_reselect == |
4731 | NULL ? "NULL" : primary_reselect); | |
4732 | return -EINVAL; | |
4733 | } | |
4734 | } else { | |
4735 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4736 | } | |
4737 | ||
3915c1e8 JV |
4738 | if (fail_over_mac) { |
4739 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4740 | fail_over_mac_tbl); | |
4741 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4742 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4743 | arp_validate == NULL ? "NULL" : arp_validate); |
4744 | return -EINVAL; | |
4745 | } | |
4746 | ||
4747 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4748 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4749 | } else { |
4750 | fail_over_mac_value = BOND_FOM_NONE; | |
4751 | } | |
dd957c57 | 4752 | |
1da177e4 LT |
4753 | /* fill params struct with the proper values */ |
4754 | params->mode = bond_mode; | |
169a3e66 | 4755 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4756 | params->miimon = miimon; |
ad246c99 | 4757 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4758 | params->arp_interval = arp_interval; |
f5b2b966 | 4759 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4760 | params->updelay = updelay; |
4761 | params->downdelay = downdelay; | |
4762 | params->use_carrier = use_carrier; | |
4763 | params->lacp_fast = lacp_fast; | |
4764 | params->primary[0] = 0; | |
a549952a | 4765 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4766 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4767 | params->tx_queues = tx_queues; |
ebd8e497 | 4768 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4769 | params->resend_igmp = resend_igmp; |
655f8919 | 4770 | params->min_links = min_links; |
1da177e4 LT |
4771 | |
4772 | if (primary) { | |
4773 | strncpy(params->primary, primary, IFNAMSIZ); | |
4774 | params->primary[IFNAMSIZ - 1] = 0; | |
4775 | } | |
4776 | ||
4777 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4778 | ||
4779 | return 0; | |
4780 | } | |
4781 | ||
0daa2303 | 4782 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4783 | static struct lock_class_key bonding_netdev_addr_lock_key; |
49ee4920 | 4784 | static struct lock_class_key bonding_tx_busylock_key; |
0daa2303 | 4785 | |
e8a0464c DM |
4786 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4787 | struct netdev_queue *txq, | |
4788 | void *_unused) | |
c773e847 DM |
4789 | { |
4790 | lockdep_set_class(&txq->_xmit_lock, | |
4791 | &bonding_netdev_xmit_lock_key); | |
4792 | } | |
4793 | ||
4794 | static void bond_set_lockdep_class(struct net_device *dev) | |
4795 | { | |
cf508b12 DM |
4796 | lockdep_set_class(&dev->addr_list_lock, |
4797 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4798 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
49ee4920 | 4799 | dev->qdisc_tx_busylock = &bonding_tx_busylock_key; |
c773e847 DM |
4800 | } |
4801 | ||
181470fc SH |
4802 | /* |
4803 | * Called from registration process | |
4804 | */ | |
4805 | static int bond_init(struct net_device *bond_dev) | |
4806 | { | |
4807 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4808 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4809 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4810 | |
4811 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4812 | ||
9fe0617d NH |
4813 | /* |
4814 | * Initialize locks that may be required during | |
4815 | * en/deslave operations. All of the bond_open work | |
4816 | * (of which this is part) should really be moved to | |
4817 | * a phase prior to dev_open | |
4818 | */ | |
4819 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4820 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4821 | ||
181470fc SH |
4822 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4823 | if (!bond->wq) | |
4824 | return -ENOMEM; | |
4825 | ||
4826 | bond_set_lockdep_class(bond_dev); | |
4827 | ||
ec87fd3b | 4828 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4829 | |
6151b3d4 | 4830 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4831 | |
f073c7ca TI |
4832 | bond_debug_register(bond); |
4833 | ||
409cc1f8 JP |
4834 | /* Ensure valid dev_addr */ |
4835 | if (is_zero_ether_addr(bond_dev->dev_addr) && | |
4836 | bond_dev->addr_assign_type == NET_ADDR_PERM) { | |
4837 | eth_hw_addr_random(bond_dev); | |
4838 | bond->dev_addr_from_first = true; | |
4839 | } | |
4840 | ||
22bedad3 | 4841 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4842 | return 0; |
4843 | } | |
4844 | ||
88ead977 EB |
4845 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4846 | { | |
4847 | if (tb[IFLA_ADDRESS]) { | |
4848 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4849 | return -EINVAL; | |
4850 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4851 | return -EADDRNOTAVAIL; | |
4852 | } | |
4853 | return 0; | |
4854 | } | |
4855 | ||
d40156aa | 4856 | static unsigned int bond_get_num_tx_queues(void) |
d5da4510 | 4857 | { |
efacb309 | 4858 | return tx_queues; |
d5da4510 JP |
4859 | } |
4860 | ||
88ead977 | 4861 | static struct rtnl_link_ops bond_link_ops __read_mostly = { |
d40156aa JP |
4862 | .kind = "bond", |
4863 | .priv_size = sizeof(struct bonding), | |
4864 | .setup = bond_setup, | |
4865 | .validate = bond_validate, | |
4866 | .get_num_tx_queues = bond_get_num_tx_queues, | |
4867 | .get_num_rx_queues = bond_get_num_tx_queues, /* Use the same number | |
4868 | as for TX queues */ | |
88ead977 EB |
4869 | }; |
4870 | ||
dfe60397 | 4871 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4872 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4873 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4874 | * set up our sysfs entries. | |
4875 | */ | |
ec87fd3b | 4876 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4877 | { |
4878 | struct net_device *bond_dev; | |
4879 | int res; | |
4880 | ||
4881 | rtnl_lock(); | |
027ea041 | 4882 | |
1c5cae81 JP |
4883 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4884 | name ? name : "bond%d", | |
4885 | bond_setup, tx_queues); | |
dfe60397 | 4886 | if (!bond_dev) { |
a4aee5c8 | 4887 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4888 | rtnl_unlock(); |
4889 | return -ENOMEM; | |
dfe60397 MW |
4890 | } |
4891 | ||
ec87fd3b | 4892 | dev_net_set(bond_dev, net); |
88ead977 EB |
4893 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4894 | ||
dfe60397 | 4895 | res = register_netdevice(bond_dev); |
0daa2303 | 4896 | |
e826eafa PO |
4897 | netif_carrier_off(bond_dev); |
4898 | ||
7e083840 | 4899 | rtnl_unlock(); |
9e2e61fb AW |
4900 | if (res < 0) |
4901 | bond_destructor(bond_dev); | |
30c15ba9 | 4902 | return res; |
dfe60397 MW |
4903 | } |
4904 | ||
2c8c1e72 | 4905 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4906 | { |
15449745 | 4907 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4908 | |
4909 | bn->net = net; | |
4910 | INIT_LIST_HEAD(&bn->dev_list); | |
4911 | ||
ec87fd3b | 4912 | bond_create_proc_dir(bn); |
4c22400a | 4913 | bond_create_sysfs(bn); |
15449745 EB |
4914 | |
4915 | return 0; | |
ec87fd3b EB |
4916 | } |
4917 | ||
2c8c1e72 | 4918 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4919 | { |
15449745 | 4920 | struct bond_net *bn = net_generic(net, bond_net_id); |
69b0216a | 4921 | struct bonding *bond, *tmp_bond; |
4922 | LIST_HEAD(list); | |
ec87fd3b | 4923 | |
4c22400a | 4924 | bond_destroy_sysfs(bn); |
ec87fd3b | 4925 | bond_destroy_proc_dir(bn); |
69b0216a | 4926 | |
4927 | /* Kill off any bonds created after unregistering bond rtnl ops */ | |
4928 | rtnl_lock(); | |
4929 | list_for_each_entry_safe(bond, tmp_bond, &bn->dev_list, bond_list) | |
4930 | unregister_netdevice_queue(bond->dev, &list); | |
4931 | unregister_netdevice_many(&list); | |
4932 | rtnl_unlock(); | |
ec87fd3b EB |
4933 | } |
4934 | ||
4935 | static struct pernet_operations bond_net_ops = { | |
4936 | .init = bond_net_init, | |
4937 | .exit = bond_net_exit, | |
15449745 EB |
4938 | .id = &bond_net_id, |
4939 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4940 | }; |
4941 | ||
1da177e4 LT |
4942 | static int __init bonding_init(void) |
4943 | { | |
1da177e4 LT |
4944 | int i; |
4945 | int res; | |
4946 | ||
bd33acc3 | 4947 | pr_info("%s", bond_version); |
1da177e4 | 4948 | |
dfe60397 | 4949 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4950 | if (res) |
dfe60397 | 4951 | goto out; |
1da177e4 | 4952 | |
15449745 | 4953 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4954 | if (res) |
4955 | goto out; | |
027ea041 | 4956 | |
88ead977 EB |
4957 | res = rtnl_link_register(&bond_link_ops); |
4958 | if (res) | |
6639104b | 4959 | goto err_link; |
88ead977 | 4960 | |
f073c7ca TI |
4961 | bond_create_debugfs(); |
4962 | ||
1da177e4 | 4963 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4964 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4965 | if (res) |
4966 | goto err; | |
1da177e4 LT |
4967 | } |
4968 | ||
1da177e4 | 4969 | register_netdevice_notifier(&bond_netdev_notifier); |
dfe60397 | 4970 | out: |
1da177e4 | 4971 | return res; |
88ead977 EB |
4972 | err: |
4973 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4974 | err_link: |
15449745 | 4975 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4976 | goto out; |
dfe60397 | 4977 | |
1da177e4 LT |
4978 | } |
4979 | ||
4980 | static void __exit bonding_exit(void) | |
4981 | { | |
4982 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
4983 | ||
f073c7ca | 4984 | bond_destroy_debugfs(); |
ae68c398 | 4985 | |
4de79c73 | 4986 | rtnl_link_unregister(&bond_link_ops); |
ffcdedb6 | 4987 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4988 | |
4989 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4990 | /* |
4991 | * Make sure we don't have an imbalance on our netpoll blocking | |
4992 | */ | |
4993 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4994 | #endif |
1da177e4 LT |
4995 | } |
4996 | ||
4997 | module_init(bonding_init); | |
4998 | module_exit(bonding_exit); | |
4999 | MODULE_LICENSE("GPL"); | |
5000 | MODULE_VERSION(DRV_VERSION); | |
5001 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5002 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5003 | MODULE_ALIAS_RTNL_LINK("bond"); |