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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
a4aee5c8 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
3d632c3f | 56 | #include <linux/io.h> |
1da177e4 | 57 | #include <asm/system.h> |
1da177e4 | 58 | #include <asm/dma.h> |
3d632c3f | 59 | #include <linux/uaccess.h> |
1da177e4 LT |
60 | #include <linux/errno.h> |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/inetdevice.h> | |
a816c7c7 | 63 | #include <linux/igmp.h> |
1da177e4 LT |
64 | #include <linux/etherdevice.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
67 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
68 | #include <linux/smp.h> |
69 | #include <linux/if_ether.h> | |
70 | #include <net/arp.h> | |
71 | #include <linux/mii.h> | |
72 | #include <linux/ethtool.h> | |
73 | #include <linux/if_vlan.h> | |
74 | #include <linux/if_bonding.h> | |
b63bb739 | 75 | #include <linux/jiffies.h> |
e843fa50 | 76 | #include <linux/preempt.h> |
c3ade5ca | 77 | #include <net/route.h> |
457c4cbc | 78 | #include <net/net_namespace.h> |
ec87fd3b | 79 | #include <net/netns/generic.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
87 | #define BOND_LINK_MON_INTERV 0 | |
88 | #define BOND_LINK_ARP_INTERV 0 | |
89 | ||
90 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 91 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 92 | static int num_peer_notif = 1; |
1da177e4 | 93 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
94 | static int updelay; |
95 | static int downdelay; | |
1da177e4 | 96 | static int use_carrier = 1; |
3d632c3f SH |
97 | static char *mode; |
98 | static char *primary; | |
a549952a | 99 | static char *primary_reselect; |
3d632c3f SH |
100 | static char *lacp_rate; |
101 | static char *ad_select; | |
102 | static char *xmit_hash_policy; | |
1da177e4 | 103 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
104 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
105 | static char *arp_validate; | |
106 | static char *fail_over_mac; | |
ebd8e497 | 107 | static int all_slaves_active = 0; |
d2991f75 | 108 | static struct bond_params bonding_defaults; |
c2952c31 | 109 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
1da177e4 LT |
110 | |
111 | module_param(max_bonds, int, 0); | |
112 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
113 | module_param(tx_queues, int, 0); |
114 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 BH |
115 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
116 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on failover event (alias of num_unsol_na)"); | |
117 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); | |
118 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
119 | module_param(miimon, int, 0); |
120 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
121 | module_param(updelay, int, 0); | |
122 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
123 | module_param(downdelay, int, 0); | |
2ac47660 MW |
124 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
125 | "in milliseconds"); | |
1da177e4 | 126 | module_param(use_carrier, int, 0); |
2ac47660 MW |
127 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
128 | "0 for off, 1 for on (default)"); | |
1da177e4 | 129 | module_param(mode, charp, 0); |
2ac47660 MW |
130 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
131 | "1 for active-backup, 2 for balance-xor, " | |
132 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
133 | "6 for balance-alb"); | |
1da177e4 LT |
134 | module_param(primary, charp, 0); |
135 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
136 | module_param(primary_reselect, charp, 0); |
137 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
138 | "once it comes up; " | |
139 | "0 for always (default), " | |
140 | "1 for only if speed of primary is " | |
141 | "better, " | |
142 | "2 for only on active slave " | |
143 | "failure"); | |
1da177e4 | 144 | module_param(lacp_rate, charp, 0); |
2ac47660 MW |
145 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
146 | "(slow/fast)"); | |
fd989c83 JV |
147 | module_param(ad_select, charp, 0); |
148 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 149 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
150 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
151 | ", 1 for layer 3+4"); | |
1da177e4 LT |
152 | module_param(arp_interval, int, 0); |
153 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
154 | module_param_array(arp_ip_target, charp, NULL, 0); | |
155 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
156 | module_param(arp_validate, charp, 0); |
157 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
158 | module_param(fail_over_mac, charp, 0); |
159 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
ebd8e497 AG |
160 | module_param(all_slaves_active, int, 0); |
161 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
162 | "by setting active flag for all slaves. " | |
163 | "0 for never (default), 1 for always."); | |
c2952c31 FL |
164 | module_param(resend_igmp, int, 0); |
165 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on link failure"); | |
1da177e4 LT |
166 | |
167 | /*----------------------------- Global variables ----------------------------*/ | |
168 | ||
e843fa50 | 169 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 170 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
171 | #endif |
172 | ||
f99189b1 | 173 | int bond_net_id __read_mostly; |
1da177e4 | 174 | |
3d632c3f SH |
175 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
176 | static int arp_ip_count; | |
1da177e4 | 177 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
178 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
179 | static int lacp_fast; | |
1da177e4 | 180 | |
e97fd7c6 | 181 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
182 | { "slow", AD_LACP_SLOW}, |
183 | { "fast", AD_LACP_FAST}, | |
184 | { NULL, -1}, | |
185 | }; | |
186 | ||
e97fd7c6 | 187 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
188 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
189 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
190 | { "balance-xor", BOND_MODE_XOR}, | |
191 | { "broadcast", BOND_MODE_BROADCAST}, | |
192 | { "802.3ad", BOND_MODE_8023AD}, | |
193 | { "balance-tlb", BOND_MODE_TLB}, | |
194 | { "balance-alb", BOND_MODE_ALB}, | |
195 | { NULL, -1}, | |
196 | }; | |
197 | ||
e97fd7c6 | 198 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
199 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
200 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 201 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
202 | { NULL, -1}, |
203 | }; | |
204 | ||
e97fd7c6 | 205 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
206 | { "none", BOND_ARP_VALIDATE_NONE}, |
207 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
208 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
209 | { "all", BOND_ARP_VALIDATE_ALL}, | |
210 | { NULL, -1}, | |
211 | }; | |
212 | ||
e97fd7c6 | 213 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
214 | { "none", BOND_FOM_NONE}, |
215 | { "active", BOND_FOM_ACTIVE}, | |
216 | { "follow", BOND_FOM_FOLLOW}, | |
217 | { NULL, -1}, | |
218 | }; | |
219 | ||
a549952a JP |
220 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
221 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
222 | { "better", BOND_PRI_RESELECT_BETTER}, | |
223 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
224 | { NULL, -1}, | |
225 | }; | |
226 | ||
fd989c83 JV |
227 | struct bond_parm_tbl ad_select_tbl[] = { |
228 | { "stable", BOND_AD_STABLE}, | |
229 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
230 | { "count", BOND_AD_COUNT}, | |
231 | { NULL, -1}, | |
232 | }; | |
233 | ||
1da177e4 LT |
234 | /*-------------------------- Forward declarations ---------------------------*/ |
235 | ||
181470fc | 236 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 237 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
238 | |
239 | /*---------------------------- General routines -----------------------------*/ | |
240 | ||
bd33acc3 | 241 | const char *bond_mode_name(int mode) |
1da177e4 | 242 | { |
77afc92b HE |
243 | static const char *names[] = { |
244 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
245 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
246 | [BOND_MODE_XOR] = "load balancing (xor)", | |
247 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 248 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
249 | [BOND_MODE_TLB] = "transmit load balancing", |
250 | [BOND_MODE_ALB] = "adaptive load balancing", | |
251 | }; | |
252 | ||
253 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 254 | return "unknown"; |
77afc92b HE |
255 | |
256 | return names[mode]; | |
1da177e4 LT |
257 | } |
258 | ||
259 | /*---------------------------------- VLAN -----------------------------------*/ | |
260 | ||
261 | /** | |
262 | * bond_add_vlan - add a new vlan id on bond | |
263 | * @bond: bond that got the notification | |
264 | * @vlan_id: the vlan id to add | |
265 | * | |
266 | * Returns -ENOMEM if allocation failed. | |
267 | */ | |
268 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
269 | { | |
270 | struct vlan_entry *vlan; | |
271 | ||
5a03cdb7 | 272 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 273 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 274 | |
305d552a | 275 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 276 | if (!vlan) |
1da177e4 | 277 | return -ENOMEM; |
1da177e4 LT |
278 | |
279 | INIT_LIST_HEAD(&vlan->vlan_list); | |
280 | vlan->vlan_id = vlan_id; | |
281 | ||
282 | write_lock_bh(&bond->lock); | |
283 | ||
284 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
285 | ||
286 | write_unlock_bh(&bond->lock); | |
287 | ||
5a03cdb7 | 288 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
289 | |
290 | return 0; | |
291 | } | |
292 | ||
293 | /** | |
294 | * bond_del_vlan - delete a vlan id from bond | |
295 | * @bond: bond that got the notification | |
296 | * @vlan_id: the vlan id to delete | |
297 | * | |
298 | * returns -ENODEV if @vlan_id was not found in @bond. | |
299 | */ | |
300 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
301 | { | |
0883beca | 302 | struct vlan_entry *vlan; |
1da177e4 LT |
303 | int res = -ENODEV; |
304 | ||
5a03cdb7 | 305 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 | 306 | |
e843fa50 | 307 | block_netpoll_tx(); |
1da177e4 LT |
308 | write_lock_bh(&bond->lock); |
309 | ||
0883beca | 310 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
311 | if (vlan->vlan_id == vlan_id) { |
312 | list_del(&vlan->vlan_list); | |
313 | ||
58402054 | 314 | if (bond_is_lb(bond)) |
1da177e4 | 315 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 316 | |
a4aee5c8 JP |
317 | pr_debug("removed VLAN ID %d from bond %s\n", |
318 | vlan_id, bond->dev->name); | |
1da177e4 LT |
319 | |
320 | kfree(vlan); | |
321 | ||
322 | if (list_empty(&bond->vlan_list) && | |
323 | (bond->slave_cnt == 0)) { | |
324 | /* Last VLAN removed and no slaves, so | |
325 | * restore block on adding VLANs. This will | |
326 | * be removed once new slaves that are not | |
327 | * VLAN challenged will be added. | |
328 | */ | |
329 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
330 | } | |
331 | ||
332 | res = 0; | |
333 | goto out; | |
334 | } | |
335 | } | |
336 | ||
a4aee5c8 JP |
337 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
338 | vlan_id, bond->dev->name); | |
1da177e4 LT |
339 | |
340 | out: | |
341 | write_unlock_bh(&bond->lock); | |
e843fa50 | 342 | unblock_netpoll_tx(); |
1da177e4 LT |
343 | return res; |
344 | } | |
345 | ||
346 | /** | |
347 | * bond_has_challenged_slaves | |
348 | * @bond: the bond we're working on | |
349 | * | |
350 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
351 | * was found, 0 otherwise. | |
352 | * | |
353 | * Assumes bond->lock is held. | |
354 | */ | |
355 | static int bond_has_challenged_slaves(struct bonding *bond) | |
356 | { | |
357 | struct slave *slave; | |
358 | int i; | |
359 | ||
360 | bond_for_each_slave(bond, slave, i) { | |
361 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 362 | pr_debug("found VLAN challenged slave - %s\n", |
a4aee5c8 | 363 | slave->dev->name); |
1da177e4 LT |
364 | return 1; |
365 | } | |
366 | } | |
367 | ||
5a03cdb7 | 368 | pr_debug("no VLAN challenged slaves found\n"); |
1da177e4 LT |
369 | return 0; |
370 | } | |
371 | ||
372 | /** | |
373 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
374 | * @bond: the bond we're working on | |
375 | * @curr: item we're advancing from | |
376 | * | |
377 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
378 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 379 | * |
1da177e4 LT |
380 | * Caller must hold bond->lock |
381 | */ | |
382 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
383 | { | |
384 | struct vlan_entry *next, *last; | |
385 | ||
3d632c3f | 386 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 387 | return NULL; |
1da177e4 LT |
388 | |
389 | if (!curr) { | |
390 | next = list_entry(bond->vlan_list.next, | |
391 | struct vlan_entry, vlan_list); | |
392 | } else { | |
393 | last = list_entry(bond->vlan_list.prev, | |
394 | struct vlan_entry, vlan_list); | |
395 | if (last == curr) { | |
396 | next = list_entry(bond->vlan_list.next, | |
397 | struct vlan_entry, vlan_list); | |
398 | } else { | |
399 | next = list_entry(curr->vlan_list.next, | |
400 | struct vlan_entry, vlan_list); | |
401 | } | |
402 | } | |
403 | ||
404 | return next; | |
405 | } | |
406 | ||
407 | /** | |
408 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 409 | * |
1da177e4 LT |
410 | * @bond: bond device that got this skb for tx. |
411 | * @skb: hw accel VLAN tagged skb to transmit | |
412 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 413 | */ |
3d632c3f SH |
414 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
415 | struct net_device *slave_dev) | |
1da177e4 | 416 | { |
8387451e | 417 | skb->dev = slave_dev; |
1da177e4 | 418 | skb->priority = 1; |
080e4130 | 419 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 420 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 421 | else |
f6dc31a8 | 422 | dev_queue_xmit(skb); |
1da177e4 LT |
423 | |
424 | return 0; | |
425 | } | |
426 | ||
427 | /* | |
428 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
429 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
430 | * lock because: | |
431 | * a. This operation is performed in IOCTL context, | |
432 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
433 | * c. Holding a lock with BH disabled while directly calling a base driver | |
434 | * entry point is generally a BAD idea. | |
3d632c3f | 435 | * |
1da177e4 LT |
436 | * The design of synchronization/protection for this operation in the 8021q |
437 | * module is good for one or more VLAN devices over a single physical device | |
438 | * and cannot be extended for a teaming solution like bonding, so there is a | |
439 | * potential race condition here where a net device from the vlan group might | |
440 | * be referenced (either by a base driver or the 8021q code) while it is being | |
441 | * removed from the system. However, it turns out we're not making matters | |
442 | * worse, and if it works for regular VLAN usage it will work here too. | |
443 | */ | |
444 | ||
445 | /** | |
446 | * bond_vlan_rx_register - Propagates registration to slaves | |
447 | * @bond_dev: bonding net device that got called | |
448 | * @grp: vlan group being registered | |
449 | */ | |
3d632c3f SH |
450 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
451 | struct vlan_group *grp) | |
1da177e4 | 452 | { |
454d7c9b | 453 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
454 | struct slave *slave; |
455 | int i; | |
456 | ||
a71fb881 | 457 | write_lock_bh(&bond->lock); |
1da177e4 | 458 | bond->vlgrp = grp; |
a71fb881 | 459 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
460 | |
461 | bond_for_each_slave(bond, slave, i) { | |
462 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 463 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
464 | |
465 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
466 | slave_ops->ndo_vlan_rx_register) { |
467 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
468 | } |
469 | } | |
470 | } | |
471 | ||
472 | /** | |
473 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
474 | * @bond_dev: bonding net device that got called | |
475 | * @vid: vlan id being added | |
476 | */ | |
477 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
478 | { | |
454d7c9b | 479 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
480 | struct slave *slave; |
481 | int i, res; | |
482 | ||
483 | bond_for_each_slave(bond, slave, i) { | |
484 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 485 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
486 | |
487 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
488 | slave_ops->ndo_vlan_rx_add_vid) { |
489 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
490 | } |
491 | } | |
492 | ||
493 | res = bond_add_vlan(bond, vid); | |
494 | if (res) { | |
a4aee5c8 | 495 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
496 | bond_dev->name, vid); |
497 | } | |
498 | } | |
499 | ||
500 | /** | |
501 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
502 | * @bond_dev: bonding net device that got called | |
503 | * @vid: vlan id being removed | |
504 | */ | |
505 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
506 | { | |
454d7c9b | 507 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
508 | struct slave *slave; |
509 | struct net_device *vlan_dev; | |
510 | int i, res; | |
511 | ||
512 | bond_for_each_slave(bond, slave, i) { | |
513 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 514 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
515 | |
516 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 517 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
518 | /* Save and then restore vlan_dev in the grp array, |
519 | * since the slave's driver might clear it. | |
520 | */ | |
5c15bdec | 521 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 522 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 523 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
524 | } |
525 | } | |
526 | ||
527 | res = bond_del_vlan(bond, vid); | |
528 | if (res) { | |
a4aee5c8 | 529 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
530 | bond_dev->name, vid); |
531 | } | |
532 | } | |
533 | ||
534 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
535 | { | |
536 | struct vlan_entry *vlan; | |
eb7cc59a | 537 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 538 | |
f35188fa | 539 | if (!bond->vlgrp) |
03dc2f4c | 540 | return; |
1da177e4 LT |
541 | |
542 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
543 | slave_ops->ndo_vlan_rx_register) |
544 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
545 | |
546 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 547 | !(slave_ops->ndo_vlan_rx_add_vid)) |
03dc2f4c | 548 | return; |
1da177e4 | 549 | |
eb7cc59a SH |
550 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
551 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
552 | } |
553 | ||
3d632c3f SH |
554 | static void bond_del_vlans_from_slave(struct bonding *bond, |
555 | struct net_device *slave_dev) | |
1da177e4 | 556 | { |
eb7cc59a | 557 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
558 | struct vlan_entry *vlan; |
559 | struct net_device *vlan_dev; | |
560 | ||
f35188fa | 561 | if (!bond->vlgrp) |
03dc2f4c | 562 | return; |
1da177e4 LT |
563 | |
564 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 565 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 566 | goto unreg; |
1da177e4 LT |
567 | |
568 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
f35188fa JV |
569 | if (!vlan->vlan_id) |
570 | continue; | |
1da177e4 LT |
571 | /* Save and then restore vlan_dev in the grp array, |
572 | * since the slave's driver might clear it. | |
573 | */ | |
5c15bdec | 574 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 575 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 576 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
577 | } |
578 | ||
579 | unreg: | |
580 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
581 | slave_ops->ndo_vlan_rx_register) |
582 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
583 | } |
584 | ||
585 | /*------------------------------- Link status -------------------------------*/ | |
586 | ||
ff59c456 JV |
587 | /* |
588 | * Set the carrier state for the master according to the state of its | |
589 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
590 | * do special 802.3ad magic. | |
591 | * | |
592 | * Returns zero if carrier state does not change, nonzero if it does. | |
593 | */ | |
594 | static int bond_set_carrier(struct bonding *bond) | |
595 | { | |
596 | struct slave *slave; | |
597 | int i; | |
598 | ||
599 | if (bond->slave_cnt == 0) | |
600 | goto down; | |
601 | ||
602 | if (bond->params.mode == BOND_MODE_8023AD) | |
603 | return bond_3ad_set_carrier(bond); | |
604 | ||
605 | bond_for_each_slave(bond, slave, i) { | |
606 | if (slave->link == BOND_LINK_UP) { | |
607 | if (!netif_carrier_ok(bond->dev)) { | |
608 | netif_carrier_on(bond->dev); | |
609 | return 1; | |
610 | } | |
611 | return 0; | |
612 | } | |
613 | } | |
614 | ||
615 | down: | |
616 | if (netif_carrier_ok(bond->dev)) { | |
617 | netif_carrier_off(bond->dev); | |
618 | return 1; | |
619 | } | |
620 | return 0; | |
621 | } | |
622 | ||
1da177e4 LT |
623 | /* |
624 | * Get link speed and duplex from the slave's base driver | |
625 | * using ethtool. If for some reason the call fails or the | |
626 | * values are invalid, fake speed and duplex to 100/Full | |
627 | * and return error. | |
628 | */ | |
629 | static int bond_update_speed_duplex(struct slave *slave) | |
630 | { | |
631 | struct net_device *slave_dev = slave->dev; | |
5d30530e DD |
632 | struct ethtool_cmd etool = { .cmd = ETHTOOL_GSET }; |
633 | u32 slave_speed; | |
61a44b9c | 634 | int res; |
1da177e4 LT |
635 | |
636 | /* Fake speed and duplex */ | |
637 | slave->speed = SPEED_100; | |
638 | slave->duplex = DUPLEX_FULL; | |
639 | ||
61a44b9c MW |
640 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
641 | return -1; | |
1da177e4 | 642 | |
61a44b9c MW |
643 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
644 | if (res < 0) | |
1da177e4 | 645 | return -1; |
1da177e4 | 646 | |
5d30530e DD |
647 | slave_speed = ethtool_cmd_speed(&etool); |
648 | switch (slave_speed) { | |
1da177e4 LT |
649 | case SPEED_10: |
650 | case SPEED_100: | |
651 | case SPEED_1000: | |
94dbffd5 | 652 | case SPEED_10000: |
1da177e4 LT |
653 | break; |
654 | default: | |
655 | return -1; | |
656 | } | |
657 | ||
658 | switch (etool.duplex) { | |
659 | case DUPLEX_FULL: | |
660 | case DUPLEX_HALF: | |
661 | break; | |
662 | default: | |
663 | return -1; | |
664 | } | |
665 | ||
5d30530e | 666 | slave->speed = slave_speed; |
1da177e4 LT |
667 | slave->duplex = etool.duplex; |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* | |
673 | * if <dev> supports MII link status reporting, check its link status. | |
674 | * | |
675 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 676 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
677 | * |
678 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
679 | * can't tell and just pretend it is), or 0, meaning that the link is | |
680 | * down. | |
681 | * | |
682 | * If reporting is non-zero, instead of faking link up, return -1 if | |
683 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
684 | * support them). If use_carrier is set, return whatever it says. | |
685 | * It'd be nice if there was a good way to tell if a driver supports | |
686 | * netif_carrier, but there really isn't. | |
687 | */ | |
3d632c3f SH |
688 | static int bond_check_dev_link(struct bonding *bond, |
689 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 690 | { |
eb7cc59a | 691 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 692 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
693 | struct ifreq ifr; |
694 | struct mii_ioctl_data *mii; | |
1da177e4 | 695 | |
6c988853 PG |
696 | if (!reporting && !netif_running(slave_dev)) |
697 | return 0; | |
698 | ||
eb7cc59a | 699 | if (bond->params.use_carrier) |
1da177e4 | 700 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 701 | |
29112f4e JP |
702 | /* Try to get link status using Ethtool first. */ |
703 | if (slave_dev->ethtool_ops) { | |
704 | if (slave_dev->ethtool_ops->get_link) { | |
705 | u32 link; | |
706 | ||
707 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
708 | ||
709 | return link ? BMSR_LSTATUS : 0; | |
710 | } | |
711 | } | |
712 | ||
3d632c3f | 713 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 714 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
715 | if (ioctl) { |
716 | /* TODO: set pointer to correct ioctl on a per team member */ | |
717 | /* bases to make this more efficient. that is, once */ | |
718 | /* we determine the correct ioctl, we will always */ | |
719 | /* call it and not the others for that team */ | |
720 | /* member. */ | |
721 | ||
722 | /* | |
723 | * We cannot assume that SIOCGMIIPHY will also read a | |
724 | * register; not all network drivers (e.g., e100) | |
725 | * support that. | |
726 | */ | |
727 | ||
728 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
729 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
730 | mii = if_mii(&ifr); | |
731 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
732 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
733 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
734 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
735 | } |
736 | } | |
737 | ||
1da177e4 LT |
738 | /* |
739 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 740 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
741 | * cannot report link status). If not reporting, pretend |
742 | * we're ok. | |
743 | */ | |
3d632c3f | 744 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
745 | } |
746 | ||
747 | /*----------------------------- Multicast list ------------------------------*/ | |
748 | ||
1da177e4 LT |
749 | /* |
750 | * Push the promiscuity flag down to appropriate slaves | |
751 | */ | |
7e1a1ac1 | 752 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 753 | { |
7e1a1ac1 | 754 | int err = 0; |
1da177e4 LT |
755 | if (USES_PRIMARY(bond->params.mode)) { |
756 | /* write lock already acquired */ | |
757 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
758 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
759 | inc); | |
1da177e4 LT |
760 | } |
761 | } else { | |
762 | struct slave *slave; | |
763 | int i; | |
764 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
765 | err = dev_set_promiscuity(slave->dev, inc); |
766 | if (err) | |
767 | return err; | |
1da177e4 LT |
768 | } |
769 | } | |
7e1a1ac1 | 770 | return err; |
1da177e4 LT |
771 | } |
772 | ||
773 | /* | |
774 | * Push the allmulti flag down to all slaves | |
775 | */ | |
7e1a1ac1 | 776 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 777 | { |
7e1a1ac1 | 778 | int err = 0; |
1da177e4 LT |
779 | if (USES_PRIMARY(bond->params.mode)) { |
780 | /* write lock already acquired */ | |
781 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
782 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
783 | inc); | |
1da177e4 LT |
784 | } |
785 | } else { | |
786 | struct slave *slave; | |
787 | int i; | |
788 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
789 | err = dev_set_allmulti(slave->dev, inc); |
790 | if (err) | |
791 | return err; | |
1da177e4 LT |
792 | } |
793 | } | |
7e1a1ac1 | 794 | return err; |
1da177e4 LT |
795 | } |
796 | ||
797 | /* | |
798 | * Add a Multicast address to slaves | |
799 | * according to mode | |
800 | */ | |
22bedad3 | 801 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
802 | { |
803 | if (USES_PRIMARY(bond->params.mode)) { | |
804 | /* write lock already acquired */ | |
3d632c3f | 805 | if (bond->curr_active_slave) |
22bedad3 | 806 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
807 | } else { |
808 | struct slave *slave; | |
809 | int i; | |
3d632c3f SH |
810 | |
811 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 812 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
813 | } |
814 | } | |
815 | ||
816 | /* | |
817 | * Remove a multicast address from slave | |
818 | * according to mode | |
819 | */ | |
22bedad3 | 820 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
821 | { |
822 | if (USES_PRIMARY(bond->params.mode)) { | |
823 | /* write lock already acquired */ | |
3d632c3f | 824 | if (bond->curr_active_slave) |
22bedad3 | 825 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
826 | } else { |
827 | struct slave *slave; | |
828 | int i; | |
829 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 830 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
831 | } |
832 | } | |
833 | } | |
834 | ||
a816c7c7 | 835 | |
5a37e8ca | 836 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
837 | { |
838 | struct in_device *in_dev; | |
a816c7c7 JV |
839 | |
840 | rcu_read_lock(); | |
5a37e8ca | 841 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 842 | if (in_dev) |
24912420 | 843 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
844 | rcu_read_unlock(); |
845 | } | |
846 | ||
5a37e8ca FL |
847 | /* |
848 | * Retrieve the list of registered multicast addresses for the bonding | |
849 | * device and retransmit an IGMP JOIN request to the current active | |
850 | * slave. | |
851 | */ | |
852 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
853 | { | |
854 | struct net_device *vlan_dev; | |
855 | struct vlan_entry *vlan; | |
856 | ||
857 | read_lock(&bond->lock); | |
858 | ||
859 | /* rejoin all groups on bond device */ | |
860 | __bond_resend_igmp_join_requests(bond->dev); | |
861 | ||
862 | /* rejoin all groups on vlan devices */ | |
863 | if (bond->vlgrp) { | |
864 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
865 | vlan_dev = vlan_group_get_device(bond->vlgrp, | |
866 | vlan->vlan_id); | |
867 | if (vlan_dev) | |
868 | __bond_resend_igmp_join_requests(vlan_dev); | |
869 | } | |
870 | } | |
871 | ||
c2952c31 FL |
872 | if (--bond->igmp_retrans > 0) |
873 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); | |
874 | ||
5a37e8ca FL |
875 | read_unlock(&bond->lock); |
876 | } | |
877 | ||
379b7383 | 878 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
879 | { |
880 | struct bonding *bond = container_of(work, struct bonding, | |
881 | mcast_work.work); | |
882 | bond_resend_igmp_join_requests(bond); | |
883 | } | |
884 | ||
1da177e4 LT |
885 | /* |
886 | * flush all members of flush->mc_list from device dev->mc_list | |
887 | */ | |
3d632c3f SH |
888 | static void bond_mc_list_flush(struct net_device *bond_dev, |
889 | struct net_device *slave_dev) | |
1da177e4 | 890 | { |
454d7c9b | 891 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 892 | struct netdev_hw_addr *ha; |
1da177e4 | 893 | |
22bedad3 JP |
894 | netdev_for_each_mc_addr(ha, bond_dev) |
895 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
896 | |
897 | if (bond->params.mode == BOND_MODE_8023AD) { | |
898 | /* del lacpdu mc addr from mc list */ | |
899 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
900 | ||
22bedad3 | 901 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
902 | } |
903 | } | |
904 | ||
905 | /*--------------------------- Active slave change ---------------------------*/ | |
906 | ||
907 | /* | |
908 | * Update the mc list and multicast-related flags for the new and | |
909 | * old active slaves (if any) according to the multicast mode, and | |
910 | * promiscuous flags unconditionally. | |
911 | */ | |
3d632c3f SH |
912 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
913 | struct slave *old_active) | |
1da177e4 | 914 | { |
22bedad3 | 915 | struct netdev_hw_addr *ha; |
1da177e4 | 916 | |
3d632c3f | 917 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
918 | /* nothing to do - mc list is already up-to-date on |
919 | * all slaves | |
920 | */ | |
921 | return; | |
1da177e4 LT |
922 | |
923 | if (old_active) { | |
3d632c3f | 924 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 925 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 926 | |
3d632c3f | 927 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 928 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 929 | |
22bedad3 JP |
930 | netdev_for_each_mc_addr(ha, bond->dev) |
931 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
932 | } |
933 | ||
934 | if (new_active) { | |
7e1a1ac1 | 935 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 936 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 937 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 938 | |
3d632c3f | 939 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 940 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 941 | |
22bedad3 JP |
942 | netdev_for_each_mc_addr(ha, bond->dev) |
943 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
944 | } |
945 | } | |
946 | ||
3915c1e8 JV |
947 | /* |
948 | * bond_do_fail_over_mac | |
949 | * | |
950 | * Perform special MAC address swapping for fail_over_mac settings | |
951 | * | |
952 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
953 | */ | |
954 | static void bond_do_fail_over_mac(struct bonding *bond, | |
955 | struct slave *new_active, | |
956 | struct slave *old_active) | |
1f78d9f9 HE |
957 | __releases(&bond->curr_slave_lock) |
958 | __releases(&bond->lock) | |
959 | __acquires(&bond->lock) | |
960 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
961 | { |
962 | u8 tmp_mac[ETH_ALEN]; | |
963 | struct sockaddr saddr; | |
964 | int rv; | |
965 | ||
966 | switch (bond->params.fail_over_mac) { | |
967 | case BOND_FOM_ACTIVE: | |
968 | if (new_active) | |
969 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
970 | new_active->dev->addr_len); | |
971 | break; | |
972 | case BOND_FOM_FOLLOW: | |
973 | /* | |
974 | * if new_active && old_active, swap them | |
975 | * if just old_active, do nothing (going to no active slave) | |
976 | * if just new_active, set new_active to bond's MAC | |
977 | */ | |
978 | if (!new_active) | |
979 | return; | |
980 | ||
981 | write_unlock_bh(&bond->curr_slave_lock); | |
982 | read_unlock(&bond->lock); | |
983 | ||
984 | if (old_active) { | |
985 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
986 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
987 | ETH_ALEN); | |
988 | saddr.sa_family = new_active->dev->type; | |
989 | } else { | |
990 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
991 | saddr.sa_family = bond->dev->type; | |
992 | } | |
993 | ||
994 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
995 | if (rv) { | |
a4aee5c8 | 996 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
997 | bond->dev->name, -rv, new_active->dev->name); |
998 | goto out; | |
999 | } | |
1000 | ||
1001 | if (!old_active) | |
1002 | goto out; | |
1003 | ||
1004 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1005 | saddr.sa_family = old_active->dev->type; | |
1006 | ||
1007 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1008 | if (rv) | |
a4aee5c8 | 1009 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
1010 | bond->dev->name, -rv, new_active->dev->name); |
1011 | out: | |
1012 | read_lock(&bond->lock); | |
1013 | write_lock_bh(&bond->curr_slave_lock); | |
1014 | break; | |
1015 | default: | |
a4aee5c8 | 1016 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
1017 | bond->dev->name, bond->params.fail_over_mac); |
1018 | break; | |
1019 | } | |
1020 | ||
1021 | } | |
1022 | ||
a549952a JP |
1023 | static bool bond_should_change_active(struct bonding *bond) |
1024 | { | |
1025 | struct slave *prim = bond->primary_slave; | |
1026 | struct slave *curr = bond->curr_active_slave; | |
1027 | ||
1028 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
1029 | return true; | |
1030 | if (bond->force_primary) { | |
1031 | bond->force_primary = false; | |
1032 | return true; | |
1033 | } | |
1034 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
1035 | (prim->speed < curr->speed || | |
1036 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
1037 | return false; | |
1038 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
1039 | return false; | |
1040 | return true; | |
1041 | } | |
3915c1e8 | 1042 | |
1da177e4 LT |
1043 | /** |
1044 | * find_best_interface - select the best available slave to be the active one | |
1045 | * @bond: our bonding struct | |
1046 | * | |
1047 | * Warning: Caller must hold curr_slave_lock for writing. | |
1048 | */ | |
1049 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1050 | { | |
1051 | struct slave *new_active, *old_active; | |
1052 | struct slave *bestslave = NULL; | |
1053 | int mintime = bond->params.updelay; | |
1054 | int i; | |
1055 | ||
49b4ad92 | 1056 | new_active = bond->curr_active_slave; |
1da177e4 LT |
1057 | |
1058 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1059 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1060 | new_active = bond->first_slave; |
3d632c3f | 1061 | else |
1da177e4 | 1062 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1063 | } |
1064 | ||
1da177e4 | 1065 | if ((bond->primary_slave) && |
a549952a JP |
1066 | bond->primary_slave->link == BOND_LINK_UP && |
1067 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1068 | new_active = bond->primary_slave; |
1069 | } | |
1070 | ||
1071 | /* remember where to stop iterating over the slaves */ | |
1072 | old_active = new_active; | |
1073 | ||
1074 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1075 | if (new_active->link == BOND_LINK_UP) { |
1076 | return new_active; | |
1077 | } else if (new_active->link == BOND_LINK_BACK && | |
1078 | IS_UP(new_active->dev)) { | |
1079 | /* link up, but waiting for stabilization */ | |
1080 | if (new_active->delay < mintime) { | |
1081 | mintime = new_active->delay; | |
1082 | bestslave = new_active; | |
1da177e4 LT |
1083 | } |
1084 | } | |
1085 | } | |
1086 | ||
1087 | return bestslave; | |
1088 | } | |
1089 | ||
ad246c99 BH |
1090 | static bool bond_should_notify_peers(struct bonding *bond) |
1091 | { | |
1092 | struct slave *slave = bond->curr_active_slave; | |
1093 | ||
1094 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1095 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1096 | ||
1097 | if (!slave || !bond->send_peer_notif || | |
1098 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1099 | return false; | |
1100 | ||
1101 | bond->send_peer_notif--; | |
1102 | return true; | |
1103 | } | |
1104 | ||
1da177e4 LT |
1105 | /** |
1106 | * change_active_interface - change the active slave into the specified one | |
1107 | * @bond: our bonding struct | |
1108 | * @new: the new slave to make the active one | |
1109 | * | |
1110 | * Set the new slave to the bond's settings and unset them on the old | |
1111 | * curr_active_slave. | |
1112 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1113 | * | |
1114 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1115 | * because it is apparently the best available slave we have, even though its | |
1116 | * updelay hasn't timed out yet. | |
1117 | * | |
3915c1e8 JV |
1118 | * If new_active is not NULL, caller must hold bond->lock for read and |
1119 | * curr_slave_lock for write_bh. | |
1da177e4 | 1120 | */ |
a77b5325 | 1121 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1122 | { |
1123 | struct slave *old_active = bond->curr_active_slave; | |
1124 | ||
3d632c3f | 1125 | if (old_active == new_active) |
1da177e4 | 1126 | return; |
1da177e4 LT |
1127 | |
1128 | if (new_active) { | |
b2220cad JV |
1129 | new_active->jiffies = jiffies; |
1130 | ||
1da177e4 LT |
1131 | if (new_active->link == BOND_LINK_BACK) { |
1132 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1133 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1134 | bond->dev->name, new_active->dev->name, | |
1135 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1136 | } |
1137 | ||
1138 | new_active->delay = 0; | |
1139 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1140 | |
3d632c3f | 1141 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1142 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1143 | |
58402054 | 1144 | if (bond_is_lb(bond)) |
1da177e4 | 1145 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1146 | } else { |
1147 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1148 | pr_info("%s: making interface %s the new active one.\n", |
1149 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1150 | } |
1151 | } | |
1152 | } | |
1153 | ||
3d632c3f | 1154 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1155 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1156 | |
58402054 | 1157 | if (bond_is_lb(bond)) { |
1da177e4 | 1158 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1159 | if (old_active) |
1160 | bond_set_slave_inactive_flags(old_active); | |
1161 | if (new_active) | |
1162 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1163 | } else { |
1164 | bond->curr_active_slave = new_active; | |
1165 | } | |
c3ade5ca JV |
1166 | |
1167 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1168 | if (old_active) |
c3ade5ca | 1169 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1170 | |
1171 | if (new_active) { | |
ad246c99 BH |
1172 | bool should_notify_peers = false; |
1173 | ||
c3ade5ca | 1174 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1175 | |
709f8a45 OG |
1176 | if (bond->params.fail_over_mac) |
1177 | bond_do_fail_over_mac(bond, new_active, | |
1178 | old_active); | |
3915c1e8 | 1179 | |
ad246c99 BH |
1180 | if (netif_running(bond->dev)) { |
1181 | bond->send_peer_notif = | |
1182 | bond->params.num_peer_notif; | |
1183 | should_notify_peers = | |
1184 | bond_should_notify_peers(bond); | |
1185 | } | |
1186 | ||
01f3109d OG |
1187 | write_unlock_bh(&bond->curr_slave_lock); |
1188 | read_unlock(&bond->lock); | |
1189 | ||
75c78500 | 1190 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1191 | if (should_notify_peers) |
1192 | netdev_bonding_change(bond->dev, | |
1193 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1194 | |
1195 | read_lock(&bond->lock); | |
1196 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1197 | } |
c3ade5ca | 1198 | } |
a2fd940f | 1199 | |
5a37e8ca FL |
1200 | /* resend IGMP joins since active slave has changed or |
1201 | * all were sent on curr_active_slave */ | |
ffa95ed5 BH |
1202 | if (((USES_PRIMARY(bond->params.mode) && new_active) || |
1203 | bond->params.mode == BOND_MODE_ROUNDROBIN) && | |
1204 | netif_running(bond->dev)) { | |
c2952c31 | 1205 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1206 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1207 | } |
1da177e4 LT |
1208 | } |
1209 | ||
1210 | /** | |
1211 | * bond_select_active_slave - select a new active slave, if needed | |
1212 | * @bond: our bonding struct | |
1213 | * | |
3d632c3f | 1214 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1215 | * - The old curr_active_slave has been released or lost its link. |
1216 | * - The primary_slave has got its link back. | |
1217 | * - A slave has got its link back and there's no old curr_active_slave. | |
1218 | * | |
3915c1e8 | 1219 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1220 | */ |
a77b5325 | 1221 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1222 | { |
1223 | struct slave *best_slave; | |
ff59c456 | 1224 | int rv; |
1da177e4 LT |
1225 | |
1226 | best_slave = bond_find_best_slave(bond); | |
1227 | if (best_slave != bond->curr_active_slave) { | |
1228 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1229 | rv = bond_set_carrier(bond); |
1230 | if (!rv) | |
1231 | return; | |
1232 | ||
1233 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1234 | pr_info("%s: first active interface up!\n", |
1235 | bond->dev->name); | |
ff59c456 | 1236 | } else { |
a4aee5c8 JP |
1237 | pr_info("%s: now running without any active interface !\n", |
1238 | bond->dev->name); | |
ff59c456 | 1239 | } |
1da177e4 LT |
1240 | } |
1241 | } | |
1242 | ||
1243 | /*--------------------------- slave list handling ---------------------------*/ | |
1244 | ||
1245 | /* | |
1246 | * This function attaches the slave to the end of list. | |
1247 | * | |
1248 | * bond->lock held for writing by caller. | |
1249 | */ | |
1250 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1251 | { | |
1252 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1253 | new_slave->next = new_slave; | |
1254 | new_slave->prev = new_slave; | |
1255 | bond->first_slave = new_slave; | |
1256 | } else { | |
1257 | new_slave->next = bond->first_slave; | |
1258 | new_slave->prev = bond->first_slave->prev; | |
1259 | new_slave->next->prev = new_slave; | |
1260 | new_slave->prev->next = new_slave; | |
1261 | } | |
1262 | ||
1263 | bond->slave_cnt++; | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * This function detaches the slave from the list. | |
1268 | * WARNING: no check is made to verify if the slave effectively | |
1269 | * belongs to <bond>. | |
1270 | * Nothing is freed on return, structures are just unchained. | |
1271 | * If any slave pointer in bond was pointing to <slave>, | |
1272 | * it should be changed by the calling function. | |
1273 | * | |
1274 | * bond->lock held for writing by caller. | |
1275 | */ | |
1276 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1277 | { | |
3d632c3f | 1278 | if (slave->next) |
1da177e4 | 1279 | slave->next->prev = slave->prev; |
1da177e4 | 1280 | |
3d632c3f | 1281 | if (slave->prev) |
1da177e4 | 1282 | slave->prev->next = slave->next; |
1da177e4 LT |
1283 | |
1284 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1285 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1286 | bond->first_slave = slave->next; | |
1287 | } else { | |
1288 | bond->first_slave = NULL; /* slave was the last one */ | |
1289 | } | |
1290 | } | |
1291 | ||
1292 | slave->next = NULL; | |
1293 | slave->prev = NULL; | |
1294 | bond->slave_cnt--; | |
1295 | } | |
1296 | ||
f6dc31a8 | 1297 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1298 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1299 | { |
8a8efa22 AW |
1300 | struct netpoll *np; |
1301 | int err = 0; | |
f6dc31a8 | 1302 | |
8a8efa22 AW |
1303 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1304 | err = -ENOMEM; | |
1305 | if (!np) | |
1306 | goto out; | |
1307 | ||
1308 | np->dev = slave->dev; | |
1309 | err = __netpoll_setup(np); | |
1310 | if (err) { | |
1311 | kfree(np); | |
1312 | goto out; | |
f6dc31a8 | 1313 | } |
8a8efa22 AW |
1314 | slave->np = np; |
1315 | out: | |
1316 | return err; | |
1317 | } | |
1318 | static inline void slave_disable_netpoll(struct slave *slave) | |
1319 | { | |
1320 | struct netpoll *np = slave->np; | |
1321 | ||
1322 | if (!np) | |
1323 | return; | |
1324 | ||
1325 | slave->np = NULL; | |
1326 | synchronize_rcu_bh(); | |
1327 | __netpoll_cleanup(np); | |
1328 | kfree(np); | |
1329 | } | |
1330 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1331 | { | |
1332 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1333 | return false; | |
1334 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1335 | return false; | |
1336 | return true; | |
f6dc31a8 WC |
1337 | } |
1338 | ||
1339 | static void bond_poll_controller(struct net_device *bond_dev) | |
1340 | { | |
8a8efa22 AW |
1341 | } |
1342 | ||
1343 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1344 | { | |
c2355e1a NH |
1345 | struct slave *slave; |
1346 | int i; | |
1347 | ||
8a8efa22 AW |
1348 | bond_for_each_slave(bond, slave, i) |
1349 | if (IS_UP(slave->dev)) | |
1350 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1351 | } |
f6dc31a8 WC |
1352 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1353 | { | |
1354 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1355 | |
1356 | read_lock(&bond->lock); | |
1357 | __bond_netpoll_cleanup(bond); | |
1358 | read_unlock(&bond->lock); | |
1359 | } | |
1360 | ||
1361 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1362 | { | |
1363 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1364 | struct slave *slave; |
8a8efa22 | 1365 | int i, err = 0; |
f6dc31a8 WC |
1366 | |
1367 | read_lock(&bond->lock); | |
f6dc31a8 | 1368 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1369 | err = slave_enable_netpoll(slave); |
1370 | if (err) { | |
1371 | __bond_netpoll_cleanup(bond); | |
1372 | break; | |
f6dc31a8 WC |
1373 | } |
1374 | } | |
1375 | read_unlock(&bond->lock); | |
8a8efa22 | 1376 | return err; |
f6dc31a8 WC |
1377 | } |
1378 | ||
8a8efa22 AW |
1379 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1380 | { | |
1381 | return bond->dev->npinfo; | |
1382 | } | |
f6dc31a8 | 1383 | |
8a8efa22 AW |
1384 | #else |
1385 | static inline int slave_enable_netpoll(struct slave *slave) | |
1386 | { | |
1387 | return 0; | |
1388 | } | |
1389 | static inline void slave_disable_netpoll(struct slave *slave) | |
1390 | { | |
1391 | } | |
f6dc31a8 WC |
1392 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1393 | { | |
1394 | } | |
f6dc31a8 WC |
1395 | #endif |
1396 | ||
1da177e4 LT |
1397 | /*---------------------------------- IOCTL ----------------------------------*/ |
1398 | ||
4ad072c9 AB |
1399 | static int bond_sethwaddr(struct net_device *bond_dev, |
1400 | struct net_device *slave_dev) | |
1da177e4 | 1401 | { |
5a03cdb7 HE |
1402 | pr_debug("bond_dev=%p\n", bond_dev); |
1403 | pr_debug("slave_dev=%p\n", slave_dev); | |
1404 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1405 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1406 | return 0; | |
1407 | } | |
1408 | ||
7f353bf2 HX |
1409 | #define BOND_VLAN_FEATURES \ |
1410 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1411 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff | 1412 | |
3d632c3f | 1413 | /* |
8e3babcd | 1414 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1415 | * feature bits are managed elsewhere, so preserve those feature bits |
1416 | * on the master device. | |
8531c5ff AK |
1417 | */ |
1418 | static int bond_compute_features(struct bonding *bond) | |
1419 | { | |
8531c5ff AK |
1420 | struct slave *slave; |
1421 | struct net_device *bond_dev = bond->dev; | |
04ed3e74 MM |
1422 | u32 features = bond_dev->features; |
1423 | u32 vlan_features = 0; | |
3158bf7d MS |
1424 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1425 | bond_dev->hard_header_len); | |
8e3babcd | 1426 | int i; |
8531c5ff | 1427 | |
7f353bf2 | 1428 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
c6e1a0d1 | 1429 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM | NETIF_F_NOCACHE_COPY; |
b63365a2 HX |
1430 | |
1431 | if (!bond->first_slave) | |
1432 | goto done; | |
1433 | ||
1434 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1435 | |
278339a4 | 1436 | vlan_features = bond->first_slave->dev->vlan_features; |
54ef3137 | 1437 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1438 | features = netdev_increment_features(features, |
1439 | slave->dev->features, | |
1440 | NETIF_F_ONE_FOR_ALL); | |
278339a4 JV |
1441 | vlan_features = netdev_increment_features(vlan_features, |
1442 | slave->dev->vlan_features, | |
1443 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1444 | if (slave->dev->hard_header_len > max_hard_header_len) |
1445 | max_hard_header_len = slave->dev->hard_header_len; | |
1446 | } | |
8531c5ff | 1447 | |
b63365a2 | 1448 | done: |
7f353bf2 | 1449 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
acd1130e MM |
1450 | bond_dev->features = netdev_fix_features(bond_dev, features); |
1451 | bond_dev->vlan_features = netdev_fix_features(bond_dev, vlan_features); | |
54ef3137 | 1452 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1453 | |
1454 | return 0; | |
1455 | } | |
1456 | ||
872254dd MS |
1457 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1458 | struct net_device *slave_dev) | |
1459 | { | |
454d7c9b | 1460 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1461 | |
00829823 | 1462 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1463 | |
1464 | bond_dev->type = slave_dev->type; | |
1465 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1466 | bond_dev->addr_len = slave_dev->addr_len; | |
1467 | ||
1468 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1469 | slave_dev->addr_len); | |
d90a162a | 1470 | bond->setup_by_slave = 1; |
872254dd MS |
1471 | } |
1472 | ||
5b2c4dd2 | 1473 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1474 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1475 | */ |
1476 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1477 | struct slave *slave, |
1478 | struct bonding *bond) | |
5b2c4dd2 | 1479 | { |
2d7011ca | 1480 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1481 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1482 | skb->pkt_type != PACKET_BROADCAST && |
1483 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1484 | return false; |
5b2c4dd2 JP |
1485 | return true; |
1486 | } | |
1487 | return false; | |
1488 | } | |
1489 | ||
8a4eb573 | 1490 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1491 | { |
8a4eb573 | 1492 | struct sk_buff *skb = *pskb; |
f1c1775a | 1493 | struct slave *slave; |
0bd80dad | 1494 | struct bonding *bond; |
5b2c4dd2 | 1495 | |
8a4eb573 JP |
1496 | skb = skb_share_check(skb, GFP_ATOMIC); |
1497 | if (unlikely(!skb)) | |
1498 | return RX_HANDLER_CONSUMED; | |
1499 | ||
1500 | *pskb = skb; | |
5b2c4dd2 | 1501 | |
35d48903 JP |
1502 | slave = bond_slave_get_rcu(skb->dev); |
1503 | bond = slave->bond; | |
0bd80dad JP |
1504 | |
1505 | if (bond->params.arp_interval) | |
f1c1775a | 1506 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1507 | |
3aba891d JP |
1508 | if (bond->recv_probe) { |
1509 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); | |
1510 | ||
1511 | if (likely(nskb)) { | |
1512 | bond->recv_probe(nskb, bond, slave); | |
1513 | dev_kfree_skb(nskb); | |
1514 | } | |
1515 | } | |
1516 | ||
0bd80dad | 1517 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1518 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1519 | } |
1520 | ||
35d48903 | 1521 | skb->dev = bond->dev; |
5b2c4dd2 | 1522 | |
0bd80dad | 1523 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1524 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1525 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1526 | |
541ac7c9 CG |
1527 | if (unlikely(skb_cow_head(skb, |
1528 | skb->data - skb_mac_header(skb)))) { | |
1529 | kfree_skb(skb); | |
8a4eb573 | 1530 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1531 | } |
35d48903 | 1532 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1533 | } |
1534 | ||
8a4eb573 | 1535 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1536 | } |
1537 | ||
1da177e4 | 1538 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1539 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1540 | { |
454d7c9b | 1541 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1542 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1543 | struct slave *new_slave = NULL; |
22bedad3 | 1544 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1545 | struct sockaddr addr; |
1546 | int link_reporting; | |
1547 | int old_features = bond_dev->features; | |
1548 | int res = 0; | |
1549 | ||
552709d5 | 1550 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1551 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1552 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1553 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1554 | } |
1555 | ||
1556 | /* bond must be initialized by bond_open() before enslaving */ | |
1557 | if (!(bond_dev->flags & IFF_UP)) { | |
a4aee5c8 JP |
1558 | pr_warning("%s: master_dev is not up in bond_enslave\n", |
1559 | bond_dev->name); | |
1da177e4 LT |
1560 | } |
1561 | ||
1562 | /* already enslaved */ | |
1563 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1564 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1565 | return -EBUSY; |
1566 | } | |
1567 | ||
1568 | /* vlan challenged mutual exclusion */ | |
1569 | /* no need to lock since we're protected by rtnl_lock */ | |
1570 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1571 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
f35188fa | 1572 | if (bond->vlgrp) { |
a4aee5c8 JP |
1573 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1574 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1575 | return -EPERM; |
1576 | } else { | |
a4aee5c8 JP |
1577 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1578 | bond_dev->name, slave_dev->name, | |
1579 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1580 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
1581 | } | |
1582 | } else { | |
5a03cdb7 | 1583 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1584 | if (bond->slave_cnt == 0) { |
1585 | /* First slave, and it is not VLAN challenged, | |
1586 | * so remove the block of adding VLANs over the bond. | |
1587 | */ | |
1588 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1589 | } | |
1590 | } | |
1591 | ||
217df670 JV |
1592 | /* |
1593 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1594 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1595 | * the current ifenslave will set the interface down prior to |
1596 | * enslaving it; the old ifenslave will not. | |
1597 | */ | |
1598 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1599 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1600 | slave_dev->name); |
1601 | res = -EPERM; | |
1602 | goto err_undo_flags; | |
1603 | } | |
1da177e4 | 1604 | |
872254dd MS |
1605 | /* set bonding device ether type by slave - bonding netdevices are |
1606 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1607 | * there is a need to override some of the type dependent attribs/funcs. | |
1608 | * | |
1609 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1610 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1611 | */ | |
1612 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1613 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1614 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1615 | bond_dev->name, |
1616 | bond_dev->type, slave_dev->type); | |
75c78500 | 1617 | |
3ca5b404 JP |
1618 | res = netdev_bonding_change(bond_dev, |
1619 | NETDEV_PRE_TYPE_CHANGE); | |
1620 | res = notifier_to_errno(res); | |
1621 | if (res) { | |
1622 | pr_err("%s: refused to change device type\n", | |
1623 | bond_dev->name); | |
1624 | res = -EBUSY; | |
1625 | goto err_undo_flags; | |
1626 | } | |
75c78500 | 1627 | |
32a806c1 | 1628 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1629 | dev_uc_flush(bond_dev); |
22bedad3 | 1630 | dev_mc_flush(bond_dev); |
32a806c1 | 1631 | |
e36b9d16 MS |
1632 | if (slave_dev->type != ARPHRD_ETHER) |
1633 | bond_setup_by_slave(bond_dev, slave_dev); | |
1634 | else | |
1635 | ether_setup(bond_dev); | |
75c78500 | 1636 | |
93d9b7d7 JP |
1637 | netdev_bonding_change(bond_dev, |
1638 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1639 | } |
872254dd | 1640 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1641 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1642 | slave_dev->name, | |
1643 | slave_dev->type, bond_dev->type); | |
1644 | res = -EINVAL; | |
1645 | goto err_undo_flags; | |
872254dd MS |
1646 | } |
1647 | ||
eb7cc59a | 1648 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1649 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1650 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1651 | bond_dev->name); | |
3915c1e8 JV |
1652 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1653 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1654 | 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", |
1655 | bond_dev->name); | |
2ab82852 MS |
1656 | res = -EOPNOTSUPP; |
1657 | goto err_undo_flags; | |
1658 | } | |
1da177e4 LT |
1659 | } |
1660 | ||
c20811a7 JP |
1661 | /* If this is the first slave, then we need to set the master's hardware |
1662 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1663 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1664 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1665 | slave_dev->addr_len); | |
1666 | ||
1667 | ||
243cb4e5 | 1668 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1669 | if (!new_slave) { |
1670 | res = -ENOMEM; | |
1671 | goto err_undo_flags; | |
1672 | } | |
1673 | ||
bb1d9123 AG |
1674 | /* |
1675 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1676 | * is set via sysfs or module option if desired. | |
1677 | */ | |
1678 | new_slave->queue_id = 0; | |
1679 | ||
b15ba0fb JP |
1680 | /* Save slave's original mtu and then set it to match the bond */ |
1681 | new_slave->original_mtu = slave_dev->mtu; | |
1682 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1683 | if (res) { | |
1684 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1685 | goto err_free; | |
1686 | } | |
1687 | ||
217df670 JV |
1688 | /* |
1689 | * Save slave's original ("permanent") mac address for modes | |
1690 | * that need it, and for restoring it upon release, and then | |
1691 | * set it to the master's address | |
1692 | */ | |
1693 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1694 | |
dd957c57 | 1695 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1696 | /* |
1697 | * Set slave to master's mac address. The application already | |
1698 | * set the master's mac address to that of the first slave | |
1699 | */ | |
1700 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1701 | addr.sa_family = slave_dev->type; | |
1702 | res = dev_set_mac_address(slave_dev, &addr); | |
1703 | if (res) { | |
5a03cdb7 | 1704 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1705 | goto err_restore_mtu; |
2ab82852 | 1706 | } |
217df670 | 1707 | } |
1da177e4 | 1708 | |
1765a575 | 1709 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1710 | if (res) { |
1765a575 | 1711 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1712 | goto err_restore_mac; |
c2edacf8 | 1713 | } |
5b2c4dd2 | 1714 | |
217df670 JV |
1715 | /* open the slave since the application closed it */ |
1716 | res = dev_open(slave_dev); | |
1717 | if (res) { | |
3d632c3f | 1718 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1719 | goto err_unset_master; |
1da177e4 LT |
1720 | } |
1721 | ||
35d48903 | 1722 | new_slave->bond = bond; |
1da177e4 | 1723 | new_slave->dev = slave_dev; |
0b680e75 | 1724 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1725 | |
58402054 | 1726 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1727 | /* bond_alb_init_slave() must be called before all other stages since |
1728 | * it might fail and we do not want to have to undo everything | |
1729 | */ | |
1730 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1731 | if (res) |
569f0c4d | 1732 | goto err_close; |
1da177e4 LT |
1733 | } |
1734 | ||
1735 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1736 | * master's promisc (and mc) settings only if it becomes the | |
1737 | * curr_active_slave, and that is taken care of later when calling | |
1738 | * bond_change_active() | |
1739 | */ | |
1740 | if (!USES_PRIMARY(bond->params.mode)) { | |
1741 | /* set promiscuity level to new slave */ | |
1742 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1743 | res = dev_set_promiscuity(slave_dev, 1); |
1744 | if (res) | |
1745 | goto err_close; | |
1da177e4 LT |
1746 | } |
1747 | ||
1748 | /* set allmulti level to new slave */ | |
1749 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1750 | res = dev_set_allmulti(slave_dev, 1); |
1751 | if (res) | |
1752 | goto err_close; | |
1da177e4 LT |
1753 | } |
1754 | ||
b9e40857 | 1755 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1756 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1757 | netdev_for_each_mc_addr(ha, bond_dev) |
1758 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1759 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1760 | } |
1761 | ||
1762 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1763 | /* add lacpdu mc addr to mc list */ | |
1764 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1765 | ||
22bedad3 | 1766 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1767 | } |
1768 | ||
1769 | bond_add_vlans_on_slave(bond, slave_dev); | |
1770 | ||
1771 | write_lock_bh(&bond->lock); | |
1772 | ||
1773 | bond_attach_slave(bond, new_slave); | |
1774 | ||
1775 | new_slave->delay = 0; | |
1776 | new_slave->link_failure_count = 0; | |
1777 | ||
8531c5ff AK |
1778 | bond_compute_features(bond); |
1779 | ||
3915c1e8 JV |
1780 | write_unlock_bh(&bond->lock); |
1781 | ||
1782 | read_lock(&bond->lock); | |
1783 | ||
f5b2b966 JV |
1784 | new_slave->last_arp_rx = jiffies; |
1785 | ||
1da177e4 LT |
1786 | if (bond->params.miimon && !bond->params.use_carrier) { |
1787 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1788 | ||
1789 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1790 | /* | |
1791 | * miimon is set but a bonded network driver | |
1792 | * does not support ETHTOOL/MII and | |
1793 | * arp_interval is not set. Note: if | |
1794 | * use_carrier is enabled, we will never go | |
1795 | * here (because netif_carrier is always | |
1796 | * supported); thus, we don't need to change | |
1797 | * the messages for netif_carrier. | |
1798 | */ | |
a4aee5c8 | 1799 | 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 | 1800 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1801 | } else if (link_reporting == -1) { |
1802 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1803 | 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", |
1804 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1805 | } |
1806 | } | |
1807 | ||
1808 | /* check for initial state */ | |
1809 | if (!bond->params.miimon || | |
1810 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1811 | if (bond->params.updelay) { | |
a4aee5c8 | 1812 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1813 | new_slave->link = BOND_LINK_BACK; |
1814 | new_slave->delay = bond->params.updelay; | |
1815 | } else { | |
a4aee5c8 | 1816 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1817 | new_slave->link = BOND_LINK_UP; |
1818 | } | |
1819 | new_slave->jiffies = jiffies; | |
1820 | } else { | |
a4aee5c8 | 1821 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1822 | new_slave->link = BOND_LINK_DOWN; |
1823 | } | |
1824 | ||
1825 | if (bond_update_speed_duplex(new_slave) && | |
1826 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1827 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1828 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1829 | |
1830 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1831 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1832 | bond_dev->name); | |
1da177e4 LT |
1833 | } |
1834 | } | |
1835 | ||
1836 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1837 | /* if there is a primary slave, remember it */ | |
a549952a | 1838 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1839 | bond->primary_slave = new_slave; |
a549952a JP |
1840 | bond->force_primary = true; |
1841 | } | |
1da177e4 LT |
1842 | } |
1843 | ||
3915c1e8 JV |
1844 | write_lock_bh(&bond->curr_slave_lock); |
1845 | ||
1da177e4 LT |
1846 | switch (bond->params.mode) { |
1847 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1848 | bond_set_slave_inactive_flags(new_slave); |
1849 | bond_select_active_slave(bond); | |
1da177e4 LT |
1850 | break; |
1851 | case BOND_MODE_8023AD: | |
1852 | /* in 802.3ad mode, the internal mechanism | |
1853 | * will activate the slaves in the selected | |
1854 | * aggregator | |
1855 | */ | |
1856 | bond_set_slave_inactive_flags(new_slave); | |
1857 | /* if this is the first slave */ | |
1858 | if (bond->slave_cnt == 1) { | |
1859 | SLAVE_AD_INFO(new_slave).id = 1; | |
1860 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1861 | * can be called only after the mac address of the bond is set | |
1862 | */ | |
1863 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1864 | bond->params.lacp_fast); | |
1865 | } else { | |
1866 | SLAVE_AD_INFO(new_slave).id = | |
1867 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1868 | } | |
1869 | ||
1870 | bond_3ad_bind_slave(new_slave); | |
1871 | break; | |
1872 | case BOND_MODE_TLB: | |
1873 | case BOND_MODE_ALB: | |
e30bc066 | 1874 | bond_set_active_slave(new_slave); |
059fe7a5 | 1875 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1876 | bond_select_active_slave(bond); |
1da177e4 LT |
1877 | break; |
1878 | default: | |
5a03cdb7 | 1879 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1880 | |
1881 | /* always active in trunk mode */ | |
e30bc066 | 1882 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1883 | |
1884 | /* In trunking mode there is little meaning to curr_active_slave | |
1885 | * anyway (it holds no special properties of the bond device), | |
1886 | * so we can change it without calling change_active_interface() | |
1887 | */ | |
3d632c3f | 1888 | if (!bond->curr_active_slave) |
1da177e4 | 1889 | bond->curr_active_slave = new_slave; |
3d632c3f | 1890 | |
1da177e4 LT |
1891 | break; |
1892 | } /* switch(bond_mode) */ | |
1893 | ||
3915c1e8 JV |
1894 | write_unlock_bh(&bond->curr_slave_lock); |
1895 | ||
ff59c456 JV |
1896 | bond_set_carrier(bond); |
1897 | ||
f6dc31a8 | 1898 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1899 | slave_dev->npinfo = bond_netpoll_info(bond); |
1900 | if (slave_dev->npinfo) { | |
1901 | if (slave_enable_netpoll(new_slave)) { | |
1902 | read_unlock(&bond->lock); | |
1903 | pr_info("Error, %s: master_dev is using netpoll, " | |
1904 | "but new slave device does not support netpoll.\n", | |
1905 | bond_dev->name); | |
1906 | res = -EBUSY; | |
1907 | goto err_close; | |
1908 | } | |
f6dc31a8 WC |
1909 | } |
1910 | #endif | |
8a8efa22 | 1911 | |
3915c1e8 | 1912 | read_unlock(&bond->lock); |
1da177e4 | 1913 | |
b76cdba9 MW |
1914 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1915 | if (res) | |
569f0c4d | 1916 | goto err_close; |
b76cdba9 | 1917 | |
35d48903 JP |
1918 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1919 | new_slave); | |
1920 | if (res) { | |
1921 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1922 | goto err_dest_symlinks; | |
1923 | } | |
1924 | ||
a4aee5c8 JP |
1925 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1926 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1927 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1928 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1929 | |
1930 | /* enslave is successful */ | |
1931 | return 0; | |
1932 | ||
1933 | /* Undo stages on error */ | |
35d48903 JP |
1934 | err_dest_symlinks: |
1935 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1936 | ||
1da177e4 LT |
1937 | err_close: |
1938 | dev_close(slave_dev); | |
1939 | ||
569f0c4d | 1940 | err_unset_master: |
1765a575 | 1941 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1942 | |
1da177e4 | 1943 | err_restore_mac: |
dd957c57 | 1944 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1945 | /* XXX TODO - fom follow mode needs to change master's |
1946 | * MAC if this slave's MAC is in use by the bond, or at | |
1947 | * least print a warning. | |
1948 | */ | |
2ab82852 MS |
1949 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1950 | addr.sa_family = slave_dev->type; | |
1951 | dev_set_mac_address(slave_dev, &addr); | |
1952 | } | |
1da177e4 | 1953 | |
b15ba0fb JP |
1954 | err_restore_mtu: |
1955 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1956 | ||
1da177e4 LT |
1957 | err_free: |
1958 | kfree(new_slave); | |
1959 | ||
1960 | err_undo_flags: | |
1961 | bond_dev->features = old_features; | |
3d632c3f | 1962 | |
1da177e4 LT |
1963 | return res; |
1964 | } | |
1965 | ||
1966 | /* | |
1967 | * Try to release the slave device <slave> from the bond device <master> | |
1968 | * It is legal to access curr_active_slave without a lock because all the function | |
1969 | * is write-locked. | |
1970 | * | |
1971 | * The rules for slave state should be: | |
1972 | * for Active/Backup: | |
1973 | * Active stays on all backups go down | |
1974 | * for Bonded connections: | |
1975 | * The first up interface should be left on and all others downed. | |
1976 | */ | |
a77b5325 | 1977 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1978 | { |
454d7c9b | 1979 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1980 | struct slave *slave, *oldcurrent; |
1981 | struct sockaddr addr; | |
1da177e4 LT |
1982 | |
1983 | /* slave is not a slave or master is not master of this slave */ | |
1984 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1985 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1986 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1987 | bond_dev->name, slave_dev->name); |
1988 | return -EINVAL; | |
1989 | } | |
1990 | ||
e843fa50 | 1991 | block_netpoll_tx(); |
f6dc31a8 | 1992 | netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE); |
1da177e4 LT |
1993 | write_lock_bh(&bond->lock); |
1994 | ||
1995 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1996 | if (!slave) { | |
1997 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1998 | pr_info("%s: %s not enslaved\n", |
1999 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 2000 | write_unlock_bh(&bond->lock); |
e843fa50 | 2001 | unblock_netpoll_tx(); |
1da177e4 LT |
2002 | return -EINVAL; |
2003 | } | |
2004 | ||
35d48903 JP |
2005 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
2006 | * for this slave anymore. | |
2007 | */ | |
2008 | netdev_rx_handler_unregister(slave_dev); | |
2009 | write_unlock_bh(&bond->lock); | |
2010 | synchronize_net(); | |
2011 | write_lock_bh(&bond->lock); | |
2012 | ||
3915c1e8 | 2013 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
2014 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
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 | ||
8531c5ff AK |
2042 | bond_compute_features(bond); |
2043 | ||
3d632c3f | 2044 | if (bond->primary_slave == slave) |
1da177e4 | 2045 | bond->primary_slave = NULL; |
1da177e4 | 2046 | |
3d632c3f | 2047 | if (oldcurrent == slave) |
1da177e4 | 2048 | bond_change_active_slave(bond, NULL); |
1da177e4 | 2049 | |
58402054 | 2050 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2051 | /* Must be called only after the slave has been |
2052 | * detached from the list and the curr_active_slave | |
2053 | * has been cleared (if our_slave == old_current), | |
2054 | * but before a new active slave is selected. | |
2055 | */ | |
2543331d | 2056 | write_unlock_bh(&bond->lock); |
1da177e4 | 2057 | bond_alb_deinit_slave(bond, slave); |
2543331d | 2058 | write_lock_bh(&bond->lock); |
1da177e4 LT |
2059 | } |
2060 | ||
059fe7a5 JV |
2061 | if (oldcurrent == slave) { |
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 JV |
2079 | bond_set_carrier(bond); |
2080 | ||
1da177e4 LT |
2081 | /* if the last slave was removed, zero the mac address |
2082 | * of the master so it will be set by the application | |
2083 | * to the mac address of the first slave | |
2084 | */ | |
2085 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2086 | ||
f35188fa | 2087 | if (!bond->vlgrp) { |
1da177e4 LT |
2088 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
2089 | } else { | |
a4aee5c8 JP |
2090 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2091 | bond_dev->name, bond_dev->name); | |
2092 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2093 | bond_dev->name); | |
1da177e4 LT |
2094 | } |
2095 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2096 | !bond_has_challenged_slaves(bond)) { | |
a4aee5c8 JP |
2097 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", |
2098 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
2099 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
2100 | } | |
2101 | ||
2102 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2103 | unblock_netpoll_tx(); |
1da177e4 | 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 | ||
1765a575 | 2129 | netdev_set_bond_master(slave_dev, NULL); |
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 | ||
d90a162a | 2152 | /* |
dadaa10b | 2153 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2154 | * Must be under rtnl_lock when this function is called. |
2155 | */ | |
26d8ee75 | 2156 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2157 | struct net_device *slave_dev) | |
d90a162a | 2158 | { |
454d7c9b | 2159 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2160 | int ret; |
2161 | ||
2162 | ret = bond_release(bond_dev, slave_dev); | |
2163 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2164 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2165 | pr_info("%s: destroying bond %s.\n", |
2166 | bond_dev->name, bond_dev->name); | |
9e71626c | 2167 | unregister_netdevice(bond_dev); |
d90a162a MS |
2168 | } |
2169 | return ret; | |
2170 | } | |
2171 | ||
1da177e4 LT |
2172 | /* |
2173 | * This function releases all slaves. | |
2174 | */ | |
2175 | static int bond_release_all(struct net_device *bond_dev) | |
2176 | { | |
454d7c9b | 2177 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2178 | struct slave *slave; |
2179 | struct net_device *slave_dev; | |
2180 | struct sockaddr addr; | |
2181 | ||
2182 | write_lock_bh(&bond->lock); | |
2183 | ||
ff59c456 JV |
2184 | netif_carrier_off(bond_dev); |
2185 | ||
3d632c3f | 2186 | if (bond->slave_cnt == 0) |
1da177e4 | 2187 | goto out; |
1da177e4 LT |
2188 | |
2189 | bond->current_arp_slave = NULL; | |
2190 | bond->primary_slave = NULL; | |
2191 | bond_change_active_slave(bond, NULL); | |
2192 | ||
2193 | while ((slave = bond->first_slave) != NULL) { | |
2194 | /* Inform AD package of unbinding of slave | |
2195 | * before slave is detached from the list. | |
2196 | */ | |
3d632c3f | 2197 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2198 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2199 | |
2200 | slave_dev = slave->dev; | |
2201 | bond_detach_slave(bond, slave); | |
2202 | ||
2543331d JV |
2203 | /* now that the slave is detached, unlock and perform |
2204 | * all the undo steps that should not be called from | |
2205 | * within a lock. | |
2206 | */ | |
2207 | write_unlock_bh(&bond->lock); | |
2208 | ||
35d48903 JP |
2209 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2210 | * be called for this slave anymore. | |
2211 | */ | |
2212 | netdev_rx_handler_unregister(slave_dev); | |
2213 | synchronize_net(); | |
2214 | ||
58402054 | 2215 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2216 | /* must be called only after the slave |
2217 | * has been detached from the list | |
2218 | */ | |
2219 | bond_alb_deinit_slave(bond, slave); | |
2220 | } | |
2221 | ||
8531c5ff AK |
2222 | bond_compute_features(bond); |
2223 | ||
b76cdba9 | 2224 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2225 | bond_del_vlans_from_slave(bond, slave_dev); |
2226 | ||
2227 | /* If the mode USES_PRIMARY, then we should only remove its | |
2228 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2229 | * already taken care of above when we detached the slave | |
2230 | */ | |
2231 | if (!USES_PRIMARY(bond->params.mode)) { | |
2232 | /* unset promiscuity level from slave */ | |
3d632c3f | 2233 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2234 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2235 | |
2236 | /* unset allmulti level from slave */ | |
3d632c3f | 2237 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2238 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2239 | |
2240 | /* flush master's mc_list from slave */ | |
b9e40857 | 2241 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2242 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2243 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2244 | } |
2245 | ||
1765a575 | 2246 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2247 | |
8a8efa22 AW |
2248 | slave_disable_netpoll(slave); |
2249 | ||
1da177e4 LT |
2250 | /* close slave before restoring its mac address */ |
2251 | dev_close(slave_dev); | |
2252 | ||
dd957c57 | 2253 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2254 | /* restore original ("permanent") mac address*/ |
2255 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2256 | addr.sa_family = slave_dev->type; | |
2257 | dev_set_mac_address(slave_dev, &addr); | |
2258 | } | |
1da177e4 | 2259 | |
1da177e4 LT |
2260 | kfree(slave); |
2261 | ||
2262 | /* re-acquire the lock before getting the next slave */ | |
2263 | write_lock_bh(&bond->lock); | |
2264 | } | |
2265 | ||
2266 | /* zero the mac address of the master so it will be | |
2267 | * set by the application to the mac address of the | |
2268 | * first slave | |
2269 | */ | |
2270 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2271 | ||
f35188fa | 2272 | if (!bond->vlgrp) { |
1da177e4 | 2273 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
f35188fa | 2274 | } else { |
a4aee5c8 JP |
2275 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2276 | bond_dev->name, bond_dev->name); | |
2277 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2278 | bond_dev->name); | |
1da177e4 LT |
2279 | } |
2280 | ||
a4aee5c8 | 2281 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2282 | |
2283 | out: | |
2284 | write_unlock_bh(&bond->lock); | |
1da177e4 LT |
2285 | return 0; |
2286 | } | |
2287 | ||
2288 | /* | |
2289 | * This function changes the active slave to slave <slave_dev>. | |
2290 | * It returns -EINVAL in the following cases. | |
2291 | * - <slave_dev> is not found in the list. | |
2292 | * - There is not active slave now. | |
2293 | * - <slave_dev> is already active. | |
2294 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2295 | * - <slave_dev> is not running. | |
3d632c3f SH |
2296 | * In these cases, this function does nothing. |
2297 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2298 | */ |
2299 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2300 | { | |
454d7c9b | 2301 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2302 | struct slave *old_active = NULL; |
2303 | struct slave *new_active = NULL; | |
2304 | int res = 0; | |
2305 | ||
3d632c3f | 2306 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2307 | return -EINVAL; |
1da177e4 LT |
2308 | |
2309 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2310 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2311 | return -EINVAL; |
1da177e4 | 2312 | |
059fe7a5 | 2313 | read_lock(&bond->lock); |
1da177e4 | 2314 | |
059fe7a5 | 2315 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2316 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2317 | read_unlock(&bond->curr_slave_lock); |
2318 | ||
1da177e4 LT |
2319 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2320 | ||
2321 | /* | |
2322 | * Changing to the current active: do nothing; return success. | |
2323 | */ | |
2324 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2325 | read_unlock(&bond->lock); |
1da177e4 LT |
2326 | return 0; |
2327 | } | |
2328 | ||
2329 | if ((new_active) && | |
2330 | (old_active) && | |
2331 | (new_active->link == BOND_LINK_UP) && | |
2332 | IS_UP(new_active->dev)) { | |
e843fa50 | 2333 | block_netpoll_tx(); |
059fe7a5 | 2334 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2335 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2336 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2337 | unblock_netpoll_tx(); |
3d632c3f | 2338 | } else |
1da177e4 | 2339 | res = -EINVAL; |
1da177e4 | 2340 | |
059fe7a5 | 2341 | read_unlock(&bond->lock); |
1da177e4 LT |
2342 | |
2343 | return res; | |
2344 | } | |
2345 | ||
1da177e4 LT |
2346 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2347 | { | |
454d7c9b | 2348 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2349 | |
2350 | info->bond_mode = bond->params.mode; | |
2351 | info->miimon = bond->params.miimon; | |
2352 | ||
6603a6f2 | 2353 | read_lock(&bond->lock); |
1da177e4 | 2354 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2355 | read_unlock(&bond->lock); |
1da177e4 LT |
2356 | |
2357 | return 0; | |
2358 | } | |
2359 | ||
2360 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2361 | { | |
454d7c9b | 2362 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2363 | struct slave *slave; |
689c96cc | 2364 | int i, res = -ENODEV; |
1da177e4 | 2365 | |
6603a6f2 | 2366 | read_lock(&bond->lock); |
1da177e4 LT |
2367 | |
2368 | bond_for_each_slave(bond, slave, i) { | |
2369 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2370 | res = 0; |
2371 | strcpy(info->slave_name, slave->dev->name); | |
2372 | info->link = slave->link; | |
e30bc066 | 2373 | info->state = bond_slave_state(slave); |
689c96cc | 2374 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2375 | break; |
2376 | } | |
2377 | } | |
2378 | ||
6603a6f2 | 2379 | read_unlock(&bond->lock); |
1da177e4 | 2380 | |
689c96cc | 2381 | return res; |
1da177e4 LT |
2382 | } |
2383 | ||
2384 | /*-------------------------------- Monitoring -------------------------------*/ | |
2385 | ||
1da177e4 | 2386 | |
f0c76d61 JV |
2387 | static int bond_miimon_inspect(struct bonding *bond) |
2388 | { | |
2389 | struct slave *slave; | |
2390 | int i, link_state, commit = 0; | |
41f89100 JP |
2391 | bool ignore_updelay; |
2392 | ||
2393 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2394 | |
2395 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2396 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2397 | |
f0c76d61 | 2398 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2399 | |
2400 | switch (slave->link) { | |
f0c76d61 JV |
2401 | case BOND_LINK_UP: |
2402 | if (link_state) | |
2403 | continue; | |
1da177e4 | 2404 | |
f0c76d61 JV |
2405 | slave->link = BOND_LINK_FAIL; |
2406 | slave->delay = bond->params.downdelay; | |
2407 | if (slave->delay) { | |
a4aee5c8 JP |
2408 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2409 | bond->dev->name, | |
2410 | (bond->params.mode == | |
2411 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2412 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2413 | "active " : "backup ") : "", |
2414 | slave->dev->name, | |
2415 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2416 | } |
f0c76d61 JV |
2417 | /*FALLTHRU*/ |
2418 | case BOND_LINK_FAIL: | |
2419 | if (link_state) { | |
2420 | /* | |
2421 | * recovered before downdelay expired | |
2422 | */ | |
2423 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2424 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2425 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2426 | bond->dev->name, | |
2427 | (bond->params.downdelay - slave->delay) * | |
2428 | bond->params.miimon, | |
2429 | slave->dev->name); | |
f0c76d61 | 2430 | continue; |
1da177e4 | 2431 | } |
f0c76d61 JV |
2432 | |
2433 | if (slave->delay <= 0) { | |
2434 | slave->new_link = BOND_LINK_DOWN; | |
2435 | commit++; | |
2436 | continue; | |
1da177e4 | 2437 | } |
1da177e4 | 2438 | |
f0c76d61 JV |
2439 | slave->delay--; |
2440 | break; | |
2441 | ||
2442 | case BOND_LINK_DOWN: | |
2443 | if (!link_state) | |
2444 | continue; | |
2445 | ||
2446 | slave->link = BOND_LINK_BACK; | |
2447 | slave->delay = bond->params.updelay; | |
2448 | ||
2449 | if (slave->delay) { | |
a4aee5c8 JP |
2450 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2451 | bond->dev->name, slave->dev->name, | |
2452 | ignore_updelay ? 0 : | |
2453 | bond->params.updelay * | |
2454 | bond->params.miimon); | |
f0c76d61 JV |
2455 | } |
2456 | /*FALLTHRU*/ | |
2457 | case BOND_LINK_BACK: | |
2458 | if (!link_state) { | |
2459 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2460 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2461 | bond->dev->name, | |
2462 | (bond->params.updelay - slave->delay) * | |
2463 | bond->params.miimon, | |
2464 | slave->dev->name); | |
f0c76d61 JV |
2465 | |
2466 | continue; | |
2467 | } | |
2468 | ||
41f89100 JP |
2469 | if (ignore_updelay) |
2470 | slave->delay = 0; | |
2471 | ||
f0c76d61 JV |
2472 | if (slave->delay <= 0) { |
2473 | slave->new_link = BOND_LINK_UP; | |
2474 | commit++; | |
41f89100 | 2475 | ignore_updelay = false; |
f0c76d61 | 2476 | continue; |
1da177e4 | 2477 | } |
f0c76d61 JV |
2478 | |
2479 | slave->delay--; | |
1da177e4 | 2480 | break; |
f0c76d61 JV |
2481 | } |
2482 | } | |
1da177e4 | 2483 | |
f0c76d61 JV |
2484 | return commit; |
2485 | } | |
1da177e4 | 2486 | |
f0c76d61 JV |
2487 | static void bond_miimon_commit(struct bonding *bond) |
2488 | { | |
2489 | struct slave *slave; | |
2490 | int i; | |
2491 | ||
2492 | bond_for_each_slave(bond, slave, i) { | |
2493 | switch (slave->new_link) { | |
2494 | case BOND_LINK_NOCHANGE: | |
2495 | continue; | |
1da177e4 | 2496 | |
f0c76d61 JV |
2497 | case BOND_LINK_UP: |
2498 | slave->link = BOND_LINK_UP; | |
2499 | slave->jiffies = jiffies; | |
2500 | ||
2501 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2502 | /* prevent it from being the active one */ | |
e30bc066 | 2503 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2504 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2505 | /* make it immediately active */ | |
e30bc066 | 2506 | bond_set_active_slave(slave); |
f0c76d61 JV |
2507 | } else if (slave != bond->primary_slave) { |
2508 | /* prevent it from being the active one */ | |
e30bc066 | 2509 | bond_set_backup_slave(slave); |
1da177e4 | 2510 | } |
1da177e4 | 2511 | |
546add79 KPO |
2512 | bond_update_speed_duplex(slave); |
2513 | ||
5d30530e | 2514 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2515 | bond->dev->name, slave->dev->name, |
2516 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2517 | |
f0c76d61 JV |
2518 | /* notify ad that the link status has changed */ |
2519 | if (bond->params.mode == BOND_MODE_8023AD) | |
2520 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2521 | |
58402054 | 2522 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2523 | bond_alb_handle_link_change(bond, slave, |
2524 | BOND_LINK_UP); | |
1da177e4 | 2525 | |
f0c76d61 JV |
2526 | if (!bond->curr_active_slave || |
2527 | (slave == bond->primary_slave)) | |
2528 | goto do_failover; | |
1da177e4 | 2529 | |
f0c76d61 | 2530 | continue; |
059fe7a5 | 2531 | |
f0c76d61 | 2532 | case BOND_LINK_DOWN: |
fba4acda JV |
2533 | if (slave->link_failure_count < UINT_MAX) |
2534 | slave->link_failure_count++; | |
2535 | ||
f0c76d61 | 2536 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2537 | |
f0c76d61 JV |
2538 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2539 | bond->params.mode == BOND_MODE_8023AD) | |
2540 | bond_set_slave_inactive_flags(slave); | |
2541 | ||
a4aee5c8 JP |
2542 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2543 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2544 | |
2545 | if (bond->params.mode == BOND_MODE_8023AD) | |
2546 | bond_3ad_handle_link_change(slave, | |
2547 | BOND_LINK_DOWN); | |
2548 | ||
ae63e808 | 2549 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2550 | bond_alb_handle_link_change(bond, slave, |
2551 | BOND_LINK_DOWN); | |
2552 | ||
2553 | if (slave == bond->curr_active_slave) | |
2554 | goto do_failover; | |
2555 | ||
2556 | continue; | |
2557 | ||
2558 | default: | |
a4aee5c8 | 2559 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2560 | bond->dev->name, slave->new_link, |
2561 | slave->dev->name); | |
2562 | slave->new_link = BOND_LINK_NOCHANGE; | |
2563 | ||
2564 | continue; | |
2565 | } | |
2566 | ||
2567 | do_failover: | |
2568 | ASSERT_RTNL(); | |
e843fa50 | 2569 | block_netpoll_tx(); |
f0c76d61 JV |
2570 | write_lock_bh(&bond->curr_slave_lock); |
2571 | bond_select_active_slave(bond); | |
2572 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2573 | unblock_netpoll_tx(); |
f0c76d61 JV |
2574 | } |
2575 | ||
2576 | bond_set_carrier(bond); | |
1da177e4 LT |
2577 | } |
2578 | ||
0b0eef66 JV |
2579 | /* |
2580 | * bond_mii_monitor | |
2581 | * | |
2582 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2583 | * inspection, then (if inspection indicates something needs to be done) |
2584 | * an acquisition of appropriate locks followed by a commit phase to | |
2585 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2586 | */ |
2587 | void bond_mii_monitor(struct work_struct *work) | |
2588 | { | |
2589 | struct bonding *bond = container_of(work, struct bonding, | |
2590 | mii_work.work); | |
ad246c99 | 2591 | bool should_notify_peers = false; |
0b0eef66 JV |
2592 | |
2593 | read_lock(&bond->lock); | |
f0c76d61 JV |
2594 | if (bond->kill_timers) |
2595 | goto out; | |
2596 | ||
2597 | if (bond->slave_cnt == 0) | |
2598 | goto re_arm; | |
b59f9f74 | 2599 | |
ad246c99 BH |
2600 | should_notify_peers = bond_should_notify_peers(bond); |
2601 | ||
f0c76d61 | 2602 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2603 | read_unlock(&bond->lock); |
2604 | rtnl_lock(); | |
2605 | read_lock(&bond->lock); | |
f0c76d61 JV |
2606 | |
2607 | bond_miimon_commit(bond); | |
2608 | ||
5655662d JV |
2609 | read_unlock(&bond->lock); |
2610 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2611 | read_lock(&bond->lock); | |
0b0eef66 JV |
2612 | } |
2613 | ||
f0c76d61 JV |
2614 | re_arm: |
2615 | if (bond->params.miimon) | |
2616 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2617 | msecs_to_jiffies(bond->params.miimon)); | |
2618 | out: | |
0b0eef66 | 2619 | read_unlock(&bond->lock); |
ad246c99 BH |
2620 | |
2621 | if (should_notify_peers) { | |
2622 | rtnl_lock(); | |
2623 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); | |
2624 | rtnl_unlock(); | |
2625 | } | |
0b0eef66 | 2626 | } |
c3ade5ca | 2627 | |
d3bb52b0 | 2628 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2629 | { |
2630 | struct in_device *idev; | |
2631 | struct in_ifaddr *ifa; | |
a144ea4b | 2632 | __be32 addr = 0; |
c3ade5ca JV |
2633 | |
2634 | if (!dev) | |
2635 | return 0; | |
2636 | ||
2637 | rcu_read_lock(); | |
e5ed6399 | 2638 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2639 | if (!idev) |
2640 | goto out; | |
2641 | ||
2642 | ifa = idev->ifa_list; | |
2643 | if (!ifa) | |
2644 | goto out; | |
2645 | ||
2646 | addr = ifa->ifa_local; | |
2647 | out: | |
2648 | rcu_read_unlock(); | |
2649 | return addr; | |
2650 | } | |
2651 | ||
d3bb52b0 | 2652 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2653 | { |
0883beca | 2654 | struct vlan_entry *vlan; |
f5b2b966 JV |
2655 | |
2656 | if (ip == bond->master_ip) | |
2657 | return 1; | |
2658 | ||
0883beca | 2659 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2660 | if (ip == vlan->vlan_ip) |
2661 | return 1; | |
2662 | } | |
2663 | ||
2664 | return 0; | |
2665 | } | |
2666 | ||
c3ade5ca JV |
2667 | /* |
2668 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2669 | * switches in VLAN mode (especially if ports are configured as | |
2670 | * "native" to a VLAN) might not pass non-tagged frames. | |
2671 | */ | |
d3bb52b0 | 2672 | 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 |
2673 | { |
2674 | struct sk_buff *skb; | |
2675 | ||
5a03cdb7 | 2676 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2677 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2678 | |
c3ade5ca JV |
2679 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2680 | NULL, slave_dev->dev_addr, NULL); | |
2681 | ||
2682 | if (!skb) { | |
a4aee5c8 | 2683 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2684 | return; |
2685 | } | |
2686 | if (vlan_id) { | |
2687 | skb = vlan_put_tag(skb, vlan_id); | |
2688 | if (!skb) { | |
a4aee5c8 | 2689 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2690 | return; |
2691 | } | |
2692 | } | |
2693 | arp_xmit(skb); | |
2694 | } | |
2695 | ||
2696 | ||
1da177e4 LT |
2697 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2698 | { | |
b23dd4fe | 2699 | int i, vlan_id; |
d3bb52b0 | 2700 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2701 | struct vlan_entry *vlan; |
c3ade5ca | 2702 | struct net_device *vlan_dev; |
c3ade5ca | 2703 | struct rtable *rt; |
1da177e4 | 2704 | |
6b780567 MW |
2705 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2706 | if (!targets[i]) | |
5a31bec0 | 2707 | break; |
5a03cdb7 | 2708 | pr_debug("basa: target %x\n", targets[i]); |
f35188fa | 2709 | if (!bond->vlgrp) { |
5a03cdb7 | 2710 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2711 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2712 | bond->master_ip, 0); | |
2713 | continue; | |
2714 | } | |
2715 | ||
2716 | /* | |
2717 | * If VLANs are configured, we do a route lookup to | |
2718 | * determine which VLAN interface would be used, so we | |
2719 | * can tag the ARP with the proper VLAN tag. | |
2720 | */ | |
78fbfd8a DM |
2721 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2722 | RTO_ONLINK, 0); | |
b23dd4fe | 2723 | if (IS_ERR(rt)) { |
c3ade5ca | 2724 | if (net_ratelimit()) { |
a4aee5c8 | 2725 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2726 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2727 | } |
2728 | continue; | |
2729 | } | |
2730 | ||
2731 | /* | |
2732 | * This target is not on a VLAN | |
2733 | */ | |
d8d1f30b | 2734 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2735 | ip_rt_put(rt); |
5a03cdb7 | 2736 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2737 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2738 | bond->master_ip, 0); | |
2739 | continue; | |
2740 | } | |
2741 | ||
2742 | vlan_id = 0; | |
0883beca | 2743 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2744 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
d8d1f30b | 2745 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2746 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2747 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2748 | vlan_dev->name, vlan_id); |
2749 | break; | |
2750 | } | |
2751 | } | |
2752 | ||
2753 | if (vlan_id) { | |
ed4b9f80 | 2754 | ip_rt_put(rt); |
c3ade5ca JV |
2755 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2756 | vlan->vlan_ip, vlan_id); | |
2757 | continue; | |
2758 | } | |
2759 | ||
2760 | if (net_ratelimit()) { | |
a4aee5c8 | 2761 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2762 | bond->dev->name, &targets[i], |
d8d1f30b | 2763 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2764 | } |
ed4b9f80 | 2765 | ip_rt_put(rt); |
c3ade5ca JV |
2766 | } |
2767 | } | |
2768 | ||
d3bb52b0 | 2769 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2770 | { |
2771 | int i; | |
d3bb52b0 | 2772 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2773 | |
f5b2b966 | 2774 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2775 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2776 | &sip, &tip, i, &targets[i], |
2777 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2778 | if (sip == targets[i]) { |
2779 | if (bond_has_this_ip(bond, tip)) | |
2780 | slave->last_arp_rx = jiffies; | |
2781 | return; | |
2782 | } | |
2783 | } | |
2784 | } | |
2785 | ||
3aba891d JP |
2786 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2787 | struct slave *slave) | |
f5b2b966 JV |
2788 | { |
2789 | struct arphdr *arp; | |
f5b2b966 | 2790 | unsigned char *arp_ptr; |
d3bb52b0 | 2791 | __be32 sip, tip; |
f5b2b966 | 2792 | |
3aba891d JP |
2793 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2794 | return; | |
f5b2b966 | 2795 | |
f5b2b966 JV |
2796 | read_lock(&bond->lock); |
2797 | ||
3aba891d JP |
2798 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2799 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2800 | |
3aba891d | 2801 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2802 | goto out_unlock; |
2803 | ||
d0a92be0 | 2804 | arp = arp_hdr(skb); |
3aba891d | 2805 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2806 | skb->pkt_type == PACKET_OTHERHOST || |
2807 | skb->pkt_type == PACKET_LOOPBACK || | |
2808 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2809 | arp->ar_pro != htons(ETH_P_IP) || | |
2810 | arp->ar_pln != 4) | |
2811 | goto out_unlock; | |
2812 | ||
2813 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2814 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2815 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2816 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2817 | memcpy(&tip, arp_ptr, 4); |
2818 | ||
5a03cdb7 | 2819 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2820 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2821 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2822 | &sip, &tip); | |
f5b2b966 JV |
2823 | |
2824 | /* | |
2825 | * Backup slaves won't see the ARP reply, but do come through | |
2826 | * here for each ARP probe (so we swap the sip/tip to validate | |
2827 | * the probe). In a "redundant switch, common router" type of | |
2828 | * configuration, the ARP probe will (hopefully) travel from | |
2829 | * the active, through one switch, the router, then the other | |
2830 | * switch before reaching the backup. | |
2831 | */ | |
e30bc066 | 2832 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2833 | bond_validate_arp(bond, slave, sip, tip); |
2834 | else | |
2835 | bond_validate_arp(bond, slave, tip, sip); | |
2836 | ||
2837 | out_unlock: | |
2838 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2839 | } |
2840 | ||
1da177e4 LT |
2841 | /* |
2842 | * this function is called regularly to monitor each slave's link | |
2843 | * ensuring that traffic is being sent and received when arp monitoring | |
2844 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2845 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2846 | * arp monitoring in active backup mode. | |
2847 | */ | |
1b76b316 | 2848 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2849 | { |
1b76b316 JV |
2850 | struct bonding *bond = container_of(work, struct bonding, |
2851 | arp_work.work); | |
1da177e4 LT |
2852 | struct slave *slave, *oldcurrent; |
2853 | int do_failover = 0; | |
2854 | int delta_in_ticks; | |
2855 | int i; | |
2856 | ||
2857 | read_lock(&bond->lock); | |
2858 | ||
5ce0da8f | 2859 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2860 | |
3d632c3f | 2861 | if (bond->kill_timers) |
1da177e4 | 2862 | goto out; |
1da177e4 | 2863 | |
3d632c3f | 2864 | if (bond->slave_cnt == 0) |
1da177e4 | 2865 | goto re_arm; |
1da177e4 LT |
2866 | |
2867 | read_lock(&bond->curr_slave_lock); | |
2868 | oldcurrent = bond->curr_active_slave; | |
2869 | read_unlock(&bond->curr_slave_lock); | |
2870 | ||
2871 | /* see if any of the previous devices are up now (i.e. they have | |
2872 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2873 | * the picture unless it is null. also, slave->jiffies is not needed | |
2874 | * here because we send an arp on each slave and give a slave as | |
2875 | * long as it needs to get the tx/rx within the delta. | |
2876 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2877 | * so it can wait | |
2878 | */ | |
2879 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2880 | unsigned long trans_start = dev_trans_start(slave->dev); |
2881 | ||
1da177e4 | 2882 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2883 | if (time_in_range(jiffies, |
2884 | trans_start - delta_in_ticks, | |
2885 | trans_start + delta_in_ticks) && | |
2886 | time_in_range(jiffies, | |
2887 | slave->dev->last_rx - delta_in_ticks, | |
2888 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2889 | |
2890 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2891 | bond_set_active_slave(slave); |
1da177e4 LT |
2892 | |
2893 | /* primary_slave has no meaning in round-robin | |
2894 | * mode. the window of a slave being up and | |
2895 | * curr_active_slave being null after enslaving | |
2896 | * is closed. | |
2897 | */ | |
2898 | if (!oldcurrent) { | |
a4aee5c8 JP |
2899 | pr_info("%s: link status definitely up for interface %s, ", |
2900 | bond->dev->name, | |
2901 | slave->dev->name); | |
1da177e4 LT |
2902 | do_failover = 1; |
2903 | } else { | |
a4aee5c8 JP |
2904 | pr_info("%s: interface %s is now up\n", |
2905 | bond->dev->name, | |
2906 | slave->dev->name); | |
1da177e4 LT |
2907 | } |
2908 | } | |
2909 | } else { | |
2910 | /* slave->link == BOND_LINK_UP */ | |
2911 | ||
2912 | /* not all switches will respond to an arp request | |
2913 | * when the source ip is 0, so don't take the link down | |
2914 | * if we don't know our ip yet | |
2915 | */ | |
cb32f2a0 JB |
2916 | if (!time_in_range(jiffies, |
2917 | trans_start - delta_in_ticks, | |
2918 | trans_start + 2 * delta_in_ticks) || | |
2919 | !time_in_range(jiffies, | |
2920 | slave->dev->last_rx - delta_in_ticks, | |
2921 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2922 | |
2923 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2924 | bond_set_backup_slave(slave); |
1da177e4 | 2925 | |
3d632c3f | 2926 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2927 | slave->link_failure_count++; |
1da177e4 | 2928 | |
a4aee5c8 JP |
2929 | pr_info("%s: interface %s is now down.\n", |
2930 | bond->dev->name, | |
2931 | slave->dev->name); | |
1da177e4 | 2932 | |
3d632c3f | 2933 | if (slave == oldcurrent) |
1da177e4 | 2934 | do_failover = 1; |
1da177e4 LT |
2935 | } |
2936 | } | |
2937 | ||
2938 | /* note: if switch is in round-robin mode, all links | |
2939 | * must tx arp to ensure all links rx an arp - otherwise | |
2940 | * links may oscillate or not come up at all; if switch is | |
2941 | * in something like xor mode, there is nothing we can | |
2942 | * do - all replies will be rx'ed on same link causing slaves | |
2943 | * to be unstable during low/no traffic periods | |
2944 | */ | |
3d632c3f | 2945 | if (IS_UP(slave->dev)) |
1da177e4 | 2946 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2947 | } |
2948 | ||
2949 | if (do_failover) { | |
e843fa50 | 2950 | block_netpoll_tx(); |
059fe7a5 | 2951 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2952 | |
2953 | bond_select_active_slave(bond); | |
2954 | ||
059fe7a5 | 2955 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2956 | unblock_netpoll_tx(); |
1da177e4 LT |
2957 | } |
2958 | ||
2959 | re_arm: | |
1b76b316 JV |
2960 | if (bond->params.arp_interval) |
2961 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2962 | out: |
2963 | read_unlock(&bond->lock); | |
2964 | } | |
2965 | ||
2966 | /* | |
b2220cad JV |
2967 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2968 | * changes. Sets new_link in slaves to specify what action should take | |
2969 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2970 | * to link states must be committed. | |
2971 | * | |
2972 | * Called with bond->lock held for read. | |
1da177e4 | 2973 | */ |
b2220cad | 2974 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2975 | { |
1da177e4 | 2976 | struct slave *slave; |
b2220cad | 2977 | int i, commit = 0; |
cb32f2a0 | 2978 | unsigned long trans_start; |
1da177e4 | 2979 | |
b2220cad JV |
2980 | bond_for_each_slave(bond, slave, i) { |
2981 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2982 | |
b2220cad | 2983 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2984 | if (time_in_range(jiffies, |
2985 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2986 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2987 | ||
b2220cad JV |
2988 | slave->new_link = BOND_LINK_UP; |
2989 | commit++; | |
2990 | } | |
1da177e4 | 2991 | |
b2220cad JV |
2992 | continue; |
2993 | } | |
1da177e4 | 2994 | |
b2220cad JV |
2995 | /* |
2996 | * Give slaves 2*delta after being enslaved or made | |
2997 | * active. This avoids bouncing, as the last receive | |
2998 | * times need a full ARP monitor cycle to be updated. | |
2999 | */ | |
cb32f2a0 JB |
3000 | if (time_in_range(jiffies, |
3001 | slave->jiffies - delta_in_ticks, | |
3002 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
3003 | continue; |
3004 | ||
3005 | /* | |
3006 | * Backup slave is down if: | |
3007 | * - No current_arp_slave AND | |
3008 | * - more than 3*delta since last receive AND | |
3009 | * - the bond has an IP address | |
3010 | * | |
3011 | * Note: a non-null current_arp_slave indicates | |
3012 | * the curr_active_slave went down and we are | |
3013 | * searching for a new one; under this condition | |
3014 | * we only take the curr_active_slave down - this | |
3015 | * gives each slave a chance to tx/rx traffic | |
3016 | * before being taken out | |
3017 | */ | |
e30bc066 | 3018 | if (!bond_is_active_slave(slave) && |
b2220cad | 3019 | !bond->current_arp_slave && |
cb32f2a0 JB |
3020 | !time_in_range(jiffies, |
3021 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3022 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
3023 | ||
b2220cad JV |
3024 | slave->new_link = BOND_LINK_DOWN; |
3025 | commit++; | |
3026 | } | |
3027 | ||
3028 | /* | |
3029 | * Active slave is down if: | |
3030 | * - more than 2*delta since transmitting OR | |
3031 | * - (more than 2*delta since receive AND | |
3032 | * the bond has an IP address) | |
3033 | */ | |
cb32f2a0 | 3034 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 3035 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
3036 | (!time_in_range(jiffies, |
3037 | trans_start - delta_in_ticks, | |
3038 | trans_start + 2 * delta_in_ticks) || | |
3039 | !time_in_range(jiffies, | |
3040 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3041 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
3042 | ||
b2220cad JV |
3043 | slave->new_link = BOND_LINK_DOWN; |
3044 | commit++; | |
3045 | } | |
1da177e4 LT |
3046 | } |
3047 | ||
b2220cad JV |
3048 | return commit; |
3049 | } | |
1da177e4 | 3050 | |
b2220cad JV |
3051 | /* |
3052 | * Called to commit link state changes noted by inspection step of | |
3053 | * active-backup mode ARP monitor. | |
3054 | * | |
3055 | * Called with RTNL and bond->lock for read. | |
3056 | */ | |
3057 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
3058 | { | |
3059 | struct slave *slave; | |
3060 | int i; | |
cb32f2a0 | 3061 | unsigned long trans_start; |
1da177e4 | 3062 | |
b2220cad JV |
3063 | bond_for_each_slave(bond, slave, i) { |
3064 | switch (slave->new_link) { | |
3065 | case BOND_LINK_NOCHANGE: | |
3066 | continue; | |
ff59c456 | 3067 | |
b2220cad | 3068 | case BOND_LINK_UP: |
cb32f2a0 | 3069 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 3070 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
3071 | time_in_range(jiffies, |
3072 | trans_start - delta_in_ticks, | |
3073 | trans_start + delta_in_ticks)) || | |
b9f60253 | 3074 | bond->curr_active_slave != slave) { |
b2220cad | 3075 | slave->link = BOND_LINK_UP; |
b2220cad JV |
3076 | bond->current_arp_slave = NULL; |
3077 | ||
a4aee5c8 | 3078 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3079 | bond->dev->name, slave->dev->name); |
b2220cad | 3080 | |
b9f60253 JP |
3081 | if (!bond->curr_active_slave || |
3082 | (slave == bond->primary_slave)) | |
3083 | goto do_failover; | |
1da177e4 | 3084 | |
b9f60253 | 3085 | } |
1da177e4 | 3086 | |
b9f60253 | 3087 | continue; |
1da177e4 | 3088 | |
b2220cad JV |
3089 | case BOND_LINK_DOWN: |
3090 | if (slave->link_failure_count < UINT_MAX) | |
3091 | slave->link_failure_count++; | |
3092 | ||
3093 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3094 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3095 | |
a4aee5c8 | 3096 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3097 | bond->dev->name, slave->dev->name); |
b2220cad | 3098 | |
b9f60253 | 3099 | if (slave == bond->curr_active_slave) { |
b2220cad | 3100 | bond->current_arp_slave = NULL; |
b9f60253 | 3101 | goto do_failover; |
1da177e4 | 3102 | } |
b9f60253 JP |
3103 | |
3104 | continue; | |
b2220cad JV |
3105 | |
3106 | default: | |
a4aee5c8 | 3107 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3108 | bond->dev->name, slave->new_link, |
3109 | slave->dev->name); | |
b9f60253 | 3110 | continue; |
1da177e4 | 3111 | } |
1da177e4 | 3112 | |
b9f60253 JP |
3113 | do_failover: |
3114 | ASSERT_RTNL(); | |
e843fa50 | 3115 | block_netpoll_tx(); |
b2220cad | 3116 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3117 | bond_select_active_slave(bond); |
b2220cad | 3118 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3119 | unblock_netpoll_tx(); |
b2220cad | 3120 | } |
1da177e4 | 3121 | |
b2220cad JV |
3122 | bond_set_carrier(bond); |
3123 | } | |
1da177e4 | 3124 | |
b2220cad JV |
3125 | /* |
3126 | * Send ARP probes for active-backup mode ARP monitor. | |
3127 | * | |
3128 | * Called with bond->lock held for read. | |
3129 | */ | |
3130 | static void bond_ab_arp_probe(struct bonding *bond) | |
3131 | { | |
3132 | struct slave *slave; | |
3133 | int i; | |
1da177e4 | 3134 | |
b2220cad | 3135 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3136 | |
b2220cad | 3137 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3138 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3139 | bond->current_arp_slave->dev->name, | |
3140 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3141 | |
b2220cad JV |
3142 | if (bond->curr_active_slave) { |
3143 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3144 | read_unlock(&bond->curr_slave_lock); | |
3145 | return; | |
3146 | } | |
1da177e4 | 3147 | |
b2220cad | 3148 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3149 | |
b2220cad JV |
3150 | /* if we don't have a curr_active_slave, search for the next available |
3151 | * backup slave from the current_arp_slave and make it the candidate | |
3152 | * for becoming the curr_active_slave | |
3153 | */ | |
1da177e4 | 3154 | |
b2220cad JV |
3155 | if (!bond->current_arp_slave) { |
3156 | bond->current_arp_slave = bond->first_slave; | |
3157 | if (!bond->current_arp_slave) | |
3158 | return; | |
3159 | } | |
1da177e4 | 3160 | |
b2220cad | 3161 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3162 | |
b2220cad JV |
3163 | /* search for next candidate */ |
3164 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3165 | if (IS_UP(slave->dev)) { | |
3166 | slave->link = BOND_LINK_BACK; | |
3167 | bond_set_slave_active_flags(slave); | |
3168 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3169 | slave->jiffies = jiffies; |
b2220cad JV |
3170 | bond->current_arp_slave = slave; |
3171 | break; | |
1da177e4 LT |
3172 | } |
3173 | ||
b2220cad JV |
3174 | /* if the link state is up at this point, we |
3175 | * mark it down - this can happen if we have | |
3176 | * simultaneous link failures and | |
3177 | * reselect_active_interface doesn't make this | |
3178 | * one the current slave so it is still marked | |
3179 | * up when it is actually down | |
1da177e4 | 3180 | */ |
b2220cad JV |
3181 | if (slave->link == BOND_LINK_UP) { |
3182 | slave->link = BOND_LINK_DOWN; | |
3183 | if (slave->link_failure_count < UINT_MAX) | |
3184 | slave->link_failure_count++; | |
1da177e4 | 3185 | |
b2220cad JV |
3186 | bond_set_slave_inactive_flags(slave); |
3187 | ||
a4aee5c8 JP |
3188 | pr_info("%s: backup interface %s is now down.\n", |
3189 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3190 | } |
b2220cad JV |
3191 | } |
3192 | } | |
1da177e4 | 3193 | |
b2220cad JV |
3194 | void bond_activebackup_arp_mon(struct work_struct *work) |
3195 | { | |
3196 | struct bonding *bond = container_of(work, struct bonding, | |
3197 | arp_work.work); | |
ad246c99 | 3198 | bool should_notify_peers = false; |
b2220cad | 3199 | int delta_in_ticks; |
1da177e4 | 3200 | |
b2220cad | 3201 | read_lock(&bond->lock); |
1da177e4 | 3202 | |
b2220cad JV |
3203 | if (bond->kill_timers) |
3204 | goto out; | |
1da177e4 | 3205 | |
b2220cad | 3206 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3207 | |
b2220cad JV |
3208 | if (bond->slave_cnt == 0) |
3209 | goto re_arm; | |
3210 | ||
ad246c99 BH |
3211 | should_notify_peers = bond_should_notify_peers(bond); |
3212 | ||
b2220cad JV |
3213 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3214 | read_unlock(&bond->lock); | |
3215 | rtnl_lock(); | |
3216 | read_lock(&bond->lock); | |
3217 | ||
3218 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3219 | ||
3220 | read_unlock(&bond->lock); | |
3221 | rtnl_unlock(); | |
3222 | read_lock(&bond->lock); | |
1da177e4 LT |
3223 | } |
3224 | ||
b2220cad JV |
3225 | bond_ab_arp_probe(bond); |
3226 | ||
1da177e4 | 3227 | re_arm: |
3d632c3f | 3228 | if (bond->params.arp_interval) |
1b76b316 | 3229 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3230 | out: |
3231 | read_unlock(&bond->lock); | |
ad246c99 BH |
3232 | |
3233 | if (should_notify_peers) { | |
3234 | rtnl_lock(); | |
3235 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); | |
3236 | rtnl_unlock(); | |
3237 | } | |
1da177e4 LT |
3238 | } |
3239 | ||
1da177e4 LT |
3240 | /*-------------------------- netdev event handling --------------------------*/ |
3241 | ||
3242 | /* | |
3243 | * Change device name | |
3244 | */ | |
3245 | static int bond_event_changename(struct bonding *bond) | |
3246 | { | |
1da177e4 LT |
3247 | bond_remove_proc_entry(bond); |
3248 | bond_create_proc_entry(bond); | |
7e083840 | 3249 | |
f073c7ca TI |
3250 | bond_debug_reregister(bond); |
3251 | ||
1da177e4 LT |
3252 | return NOTIFY_DONE; |
3253 | } | |
3254 | ||
3d632c3f SH |
3255 | static int bond_master_netdev_event(unsigned long event, |
3256 | struct net_device *bond_dev) | |
1da177e4 | 3257 | { |
454d7c9b | 3258 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3259 | |
3260 | switch (event) { | |
3261 | case NETDEV_CHANGENAME: | |
3262 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3263 | default: |
3264 | break; | |
3265 | } | |
3266 | ||
3267 | return NOTIFY_DONE; | |
3268 | } | |
3269 | ||
3d632c3f SH |
3270 | static int bond_slave_netdev_event(unsigned long event, |
3271 | struct net_device *slave_dev) | |
1da177e4 LT |
3272 | { |
3273 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3274 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3275 | |
3276 | switch (event) { | |
3277 | case NETDEV_UNREGISTER: | |
3278 | if (bond_dev) { | |
1284cd3a JV |
3279 | if (bond->setup_by_slave) |
3280 | bond_release_and_destroy(bond_dev, slave_dev); | |
3281 | else | |
3282 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3283 | } |
3284 | break; | |
3285 | case NETDEV_CHANGE: | |
17d04500 JV |
3286 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3287 | struct slave *slave; | |
3288 | ||
3289 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3290 | if (slave) { | |
5d30530e | 3291 | u32 old_speed = slave->speed; |
65cce19c | 3292 | u8 old_duplex = slave->duplex; |
17d04500 JV |
3293 | |
3294 | bond_update_speed_duplex(slave); | |
3295 | ||
3296 | if (bond_is_lb(bond)) | |
3297 | break; | |
3298 | ||
3299 | if (old_speed != slave->speed) | |
3300 | bond_3ad_adapter_speed_changed(slave); | |
3301 | if (old_duplex != slave->duplex) | |
3302 | bond_3ad_adapter_duplex_changed(slave); | |
3303 | } | |
3304 | } | |
3305 | ||
1da177e4 LT |
3306 | break; |
3307 | case NETDEV_DOWN: | |
3308 | /* | |
3309 | * ... Or is it this? | |
3310 | */ | |
3311 | break; | |
3312 | case NETDEV_CHANGEMTU: | |
3313 | /* | |
3314 | * TODO: Should slaves be allowed to | |
3315 | * independently alter their MTU? For | |
3316 | * an active-backup bond, slaves need | |
3317 | * not be the same type of device, so | |
3318 | * MTUs may vary. For other modes, | |
3319 | * slaves arguably should have the | |
3320 | * same MTUs. To do this, we'd need to | |
3321 | * take over the slave's change_mtu | |
3322 | * function for the duration of their | |
3323 | * servitude. | |
3324 | */ | |
3325 | break; | |
3326 | case NETDEV_CHANGENAME: | |
3327 | /* | |
3328 | * TODO: handle changing the primary's name | |
3329 | */ | |
3330 | break; | |
8531c5ff AK |
3331 | case NETDEV_FEAT_CHANGE: |
3332 | bond_compute_features(bond); | |
3333 | break; | |
1da177e4 LT |
3334 | default: |
3335 | break; | |
3336 | } | |
3337 | ||
3338 | return NOTIFY_DONE; | |
3339 | } | |
3340 | ||
3341 | /* | |
3342 | * bond_netdev_event: handle netdev notifier chain events. | |
3343 | * | |
3344 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3345 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3346 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3347 | * dev_probe_lock). | |
3348 | */ | |
3d632c3f SH |
3349 | static int bond_netdev_event(struct notifier_block *this, |
3350 | unsigned long event, void *ptr) | |
1da177e4 LT |
3351 | { |
3352 | struct net_device *event_dev = (struct net_device *)ptr; | |
3353 | ||
5a03cdb7 | 3354 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3355 | event_dev ? event_dev->name : "None", |
3356 | event); | |
1da177e4 | 3357 | |
0b680e75 JV |
3358 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3359 | return NOTIFY_DONE; | |
3360 | ||
1da177e4 | 3361 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3362 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3363 | return bond_master_netdev_event(event, event_dev); |
3364 | } | |
3365 | ||
3366 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3367 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3368 | return bond_slave_netdev_event(event, event_dev); |
3369 | } | |
3370 | ||
3371 | return NOTIFY_DONE; | |
3372 | } | |
3373 | ||
c3ade5ca JV |
3374 | /* |
3375 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3376 | * | |
3377 | * We keep track of device IPs primarily to use as source addresses in | |
3378 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3379 | * | |
3380 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3381 | */ | |
3382 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3383 | { | |
3384 | struct in_ifaddr *ifa = ptr; | |
3385 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3386 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3387 | struct bonding *bond; |
3388 | struct vlan_entry *vlan; | |
c3ade5ca | 3389 | |
ec87fd3b | 3390 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3391 | if (bond->dev == event_dev) { |
3392 | switch (event) { | |
3393 | case NETDEV_UP: | |
3394 | bond->master_ip = ifa->ifa_local; | |
3395 | return NOTIFY_OK; | |
3396 | case NETDEV_DOWN: | |
3397 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3398 | return NOTIFY_OK; | |
3399 | default: | |
3400 | return NOTIFY_DONE; | |
3401 | } | |
3402 | } | |
3403 | ||
0883beca | 3404 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
3405 | if (!bond->vlgrp) |
3406 | continue; | |
5c15bdec | 3407 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3408 | if (vlan_dev == event_dev) { |
3409 | switch (event) { | |
3410 | case NETDEV_UP: | |
3411 | vlan->vlan_ip = ifa->ifa_local; | |
3412 | return NOTIFY_OK; | |
3413 | case NETDEV_DOWN: | |
3414 | vlan->vlan_ip = | |
3415 | bond_glean_dev_ip(vlan_dev); | |
3416 | return NOTIFY_OK; | |
3417 | default: | |
3418 | return NOTIFY_DONE; | |
3419 | } | |
3420 | } | |
3421 | } | |
3422 | } | |
3423 | return NOTIFY_DONE; | |
3424 | } | |
3425 | ||
1da177e4 LT |
3426 | static struct notifier_block bond_netdev_notifier = { |
3427 | .notifier_call = bond_netdev_event, | |
3428 | }; | |
3429 | ||
c3ade5ca JV |
3430 | static struct notifier_block bond_inetaddr_notifier = { |
3431 | .notifier_call = bond_inetaddr_event, | |
3432 | }; | |
3433 | ||
169a3e66 JV |
3434 | /*---------------------------- Hashing Policies -----------------------------*/ |
3435 | ||
6f6652be JV |
3436 | /* |
3437 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3438 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3439 | */ | |
a361c83c | 3440 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3441 | { |
3442 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3443 | struct iphdr *iph = ip_hdr(skb); | |
3444 | ||
f14c4e4e | 3445 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3446 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3447 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3448 | } |
3449 | ||
d3da6831 | 3450 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3451 | } |
3452 | ||
169a3e66 | 3453 | /* |
59c51591 | 3454 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3455 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3456 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3457 | */ | |
a361c83c | 3458 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3459 | { |
3460 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3461 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3462 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3463 | int layer4_xor = 0; |
3464 | ||
f14c4e4e BH |
3465 | if (skb->protocol == htons(ETH_P_IP)) { |
3466 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3467 | (iph->protocol == IPPROTO_TCP || |
3468 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3469 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3470 | } |
3471 | return (layer4_xor ^ | |
3472 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3473 | ||
3474 | } | |
3475 | ||
d3da6831 | 3476 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3477 | } |
3478 | ||
3479 | /* | |
3480 | * Hash for the output device based upon layer 2 data | |
3481 | */ | |
a361c83c | 3482 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3483 | { |
3484 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3485 | ||
d3da6831 | 3486 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3487 | } |
3488 | ||
1da177e4 LT |
3489 | /*-------------------------- Device entry points ----------------------------*/ |
3490 | ||
3491 | static int bond_open(struct net_device *bond_dev) | |
3492 | { | |
454d7c9b | 3493 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3494 | |
3495 | bond->kill_timers = 0; | |
3496 | ||
5a37e8ca FL |
3497 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3498 | ||
58402054 | 3499 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3500 | /* bond_alb_initialize must be called before the timer |
3501 | * is started. | |
3502 | */ | |
3503 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3504 | /* something went wrong - fail the open operation */ | |
b473946a | 3505 | return -ENOMEM; |
1da177e4 LT |
3506 | } |
3507 | ||
1b76b316 JV |
3508 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3509 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3510 | } |
3511 | ||
3512 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3513 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3514 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3515 | } |
3516 | ||
3517 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3518 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3519 | INIT_DELAYED_WORK(&bond->arp_work, | |
3520 | bond_activebackup_arp_mon); | |
3521 | else | |
3522 | INIT_DELAYED_WORK(&bond->arp_work, | |
3523 | bond_loadbalance_arp_mon); | |
3524 | ||
3525 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3526 | if (bond->params.arp_validate) |
3aba891d | 3527 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3528 | } |
3529 | ||
3530 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3531 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3532 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3533 | /* register to receive LACPDUs */ |
3aba891d | 3534 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3535 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3536 | } |
3537 | ||
3538 | return 0; | |
3539 | } | |
3540 | ||
3541 | static int bond_close(struct net_device *bond_dev) | |
3542 | { | |
454d7c9b | 3543 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3544 | |
1da177e4 LT |
3545 | write_lock_bh(&bond->lock); |
3546 | ||
ad246c99 BH |
3547 | bond->send_peer_notif = 0; |
3548 | ||
1da177e4 LT |
3549 | /* signal timers not to re-arm */ |
3550 | bond->kill_timers = 1; | |
3551 | ||
3552 | write_unlock_bh(&bond->lock); | |
3553 | ||
1da177e4 | 3554 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3555 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3556 | } |
3557 | ||
3558 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3559 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3560 | } |
3561 | ||
3562 | switch (bond->params.mode) { | |
3563 | case BOND_MODE_8023AD: | |
1b76b316 | 3564 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3565 | break; |
3566 | case BOND_MODE_TLB: | |
3567 | case BOND_MODE_ALB: | |
1b76b316 | 3568 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3569 | break; |
3570 | default: | |
3571 | break; | |
3572 | } | |
3573 | ||
5a37e8ca FL |
3574 | if (delayed_work_pending(&bond->mcast_work)) |
3575 | cancel_delayed_work(&bond->mcast_work); | |
1da177e4 | 3576 | |
58402054 | 3577 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3578 | /* Must be called only after all |
3579 | * slaves have been released | |
3580 | */ | |
3581 | bond_alb_deinitialize(bond); | |
3582 | } | |
3aba891d | 3583 | bond->recv_probe = NULL; |
1da177e4 LT |
3584 | |
3585 | return 0; | |
3586 | } | |
3587 | ||
28172739 ED |
3588 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3589 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3590 | { |
454d7c9b | 3591 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3592 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3593 | struct slave *slave; |
3594 | int i; | |
3595 | ||
28172739 | 3596 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3597 | |
3598 | read_lock_bh(&bond->lock); | |
3599 | ||
3600 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3601 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3602 | dev_get_stats(slave->dev, &temp); |
3603 | ||
3604 | stats->rx_packets += sstats->rx_packets; | |
3605 | stats->rx_bytes += sstats->rx_bytes; | |
3606 | stats->rx_errors += sstats->rx_errors; | |
3607 | stats->rx_dropped += sstats->rx_dropped; | |
3608 | ||
3609 | stats->tx_packets += sstats->tx_packets; | |
3610 | stats->tx_bytes += sstats->tx_bytes; | |
3611 | stats->tx_errors += sstats->tx_errors; | |
3612 | stats->tx_dropped += sstats->tx_dropped; | |
3613 | ||
3614 | stats->multicast += sstats->multicast; | |
3615 | stats->collisions += sstats->collisions; | |
3616 | ||
3617 | stats->rx_length_errors += sstats->rx_length_errors; | |
3618 | stats->rx_over_errors += sstats->rx_over_errors; | |
3619 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3620 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3621 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3622 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3623 | ||
3624 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3625 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3626 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3627 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3628 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3629 | } |
3630 | ||
1da177e4 LT |
3631 | read_unlock_bh(&bond->lock); |
3632 | ||
3633 | return stats; | |
3634 | } | |
3635 | ||
3636 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3637 | { | |
3638 | struct net_device *slave_dev = NULL; | |
3639 | struct ifbond k_binfo; | |
3640 | struct ifbond __user *u_binfo = NULL; | |
3641 | struct ifslave k_sinfo; | |
3642 | struct ifslave __user *u_sinfo = NULL; | |
3643 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3644 | int res = 0; |
3645 | ||
a4aee5c8 | 3646 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3647 | |
3648 | switch (cmd) { | |
1da177e4 LT |
3649 | case SIOCGMIIPHY: |
3650 | mii = if_mii(ifr); | |
3d632c3f | 3651 | if (!mii) |
1da177e4 | 3652 | return -EINVAL; |
3d632c3f | 3653 | |
1da177e4 LT |
3654 | mii->phy_id = 0; |
3655 | /* Fall Through */ | |
3656 | case SIOCGMIIREG: | |
3657 | /* | |
3658 | * We do this again just in case we were called by SIOCGMIIREG | |
3659 | * instead of SIOCGMIIPHY. | |
3660 | */ | |
3661 | mii = if_mii(ifr); | |
3d632c3f | 3662 | if (!mii) |
1da177e4 | 3663 | return -EINVAL; |
3d632c3f | 3664 | |
1da177e4 LT |
3665 | |
3666 | if (mii->reg_num == 1) { | |
454d7c9b | 3667 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3668 | mii->val_out = 0; |
6603a6f2 | 3669 | read_lock(&bond->lock); |
1da177e4 | 3670 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3671 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3672 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3673 | |
1da177e4 | 3674 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3675 | read_unlock(&bond->lock); |
1da177e4 LT |
3676 | } |
3677 | ||
3678 | return 0; | |
3679 | case BOND_INFO_QUERY_OLD: | |
3680 | case SIOCBONDINFOQUERY: | |
3681 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3682 | ||
3d632c3f | 3683 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3684 | return -EFAULT; |
1da177e4 LT |
3685 | |
3686 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3687 | if (res == 0 && |
3688 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3689 | return -EFAULT; | |
1da177e4 LT |
3690 | |
3691 | return res; | |
3692 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3693 | case SIOCBONDSLAVEINFOQUERY: | |
3694 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3695 | ||
3d632c3f | 3696 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3697 | return -EFAULT; |
1da177e4 LT |
3698 | |
3699 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3700 | if (res == 0 && |
3701 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3702 | return -EFAULT; | |
1da177e4 LT |
3703 | |
3704 | return res; | |
3705 | default: | |
3706 | /* Go on */ | |
3707 | break; | |
3708 | } | |
3709 | ||
3d632c3f | 3710 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3711 | return -EPERM; |
1da177e4 | 3712 | |
ec87fd3b | 3713 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3714 | |
a4aee5c8 | 3715 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3716 | |
3d632c3f | 3717 | if (!slave_dev) |
1da177e4 | 3718 | res = -ENODEV; |
3d632c3f | 3719 | else { |
a4aee5c8 | 3720 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3721 | switch (cmd) { |
3722 | case BOND_ENSLAVE_OLD: | |
3723 | case SIOCBONDENSLAVE: | |
3724 | res = bond_enslave(bond_dev, slave_dev); | |
3725 | break; | |
3726 | case BOND_RELEASE_OLD: | |
3727 | case SIOCBONDRELEASE: | |
3728 | res = bond_release(bond_dev, slave_dev); | |
3729 | break; | |
3730 | case BOND_SETHWADDR_OLD: | |
3731 | case SIOCBONDSETHWADDR: | |
3732 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3733 | break; | |
3734 | case BOND_CHANGE_ACTIVE_OLD: | |
3735 | case SIOCBONDCHANGEACTIVE: | |
3736 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3737 | break; | |
3738 | default: | |
3739 | res = -EOPNOTSUPP; | |
3740 | } | |
3741 | ||
3742 | dev_put(slave_dev); | |
3743 | } | |
3744 | ||
1da177e4 LT |
3745 | return res; |
3746 | } | |
3747 | ||
22bedad3 JP |
3748 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3749 | struct netdev_hw_addr_list *list, | |
3750 | int addrlen) | |
3751 | { | |
3752 | struct netdev_hw_addr *ha; | |
3753 | ||
3754 | netdev_hw_addr_list_for_each(ha, list) | |
3755 | if (!memcmp(ha->addr, addr, addrlen)) | |
3756 | return true; | |
3757 | ||
3758 | return false; | |
3759 | } | |
3760 | ||
1da177e4 LT |
3761 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3762 | { | |
454d7c9b | 3763 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 JP |
3764 | struct netdev_hw_addr *ha; |
3765 | bool found; | |
1da177e4 | 3766 | |
1da177e4 LT |
3767 | /* |
3768 | * Do promisc before checking multicast_mode | |
3769 | */ | |
3d632c3f | 3770 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
3771 | /* |
3772 | * FIXME: Need to handle the error when one of the multi-slaves | |
3773 | * encounters error. | |
3774 | */ | |
1da177e4 | 3775 | bond_set_promiscuity(bond, 1); |
1da177e4 | 3776 | |
3d632c3f SH |
3777 | |
3778 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 3779 | bond_set_promiscuity(bond, -1); |
3d632c3f | 3780 | |
1da177e4 LT |
3781 | |
3782 | /* set allmulti flag to slaves */ | |
3d632c3f | 3783 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
3784 | /* |
3785 | * FIXME: Need to handle the error when one of the multi-slaves | |
3786 | * encounters error. | |
3787 | */ | |
1da177e4 | 3788 | bond_set_allmulti(bond, 1); |
1da177e4 | 3789 | |
3d632c3f SH |
3790 | |
3791 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 3792 | bond_set_allmulti(bond, -1); |
3d632c3f | 3793 | |
1da177e4 | 3794 | |
80ee5ad2 JV |
3795 | read_lock(&bond->lock); |
3796 | ||
1da177e4 LT |
3797 | bond->flags = bond_dev->flags; |
3798 | ||
3799 | /* looking for addresses to add to slaves' mc list */ | |
22bedad3 JP |
3800 | netdev_for_each_mc_addr(ha, bond_dev) { |
3801 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3802 | bond_dev->addr_len); | |
3803 | if (!found) | |
3804 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3805 | } |
3806 | ||
3807 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3808 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3809 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3810 | bond_dev->addr_len); | |
3811 | if (!found) | |
3812 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3813 | } |
3814 | ||
3815 | /* save master's multicast list */ | |
22bedad3 JP |
3816 | __hw_addr_flush(&bond->mc_list); |
3817 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3818 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3819 | |
80ee5ad2 | 3820 | read_unlock(&bond->lock); |
1da177e4 LT |
3821 | } |
3822 | ||
00829823 SH |
3823 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3824 | { | |
3825 | struct bonding *bond = netdev_priv(dev); | |
3826 | struct slave *slave = bond->first_slave; | |
3827 | ||
3828 | if (slave) { | |
3829 | const struct net_device_ops *slave_ops | |
3830 | = slave->dev->netdev_ops; | |
3831 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3832 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3833 | } |
3834 | return 0; | |
3835 | } | |
3836 | ||
1da177e4 LT |
3837 | /* |
3838 | * Change the MTU of all of a master's slaves to match the master | |
3839 | */ | |
3840 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3841 | { | |
454d7c9b | 3842 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3843 | struct slave *slave, *stop_at; |
3844 | int res = 0; | |
3845 | int i; | |
3846 | ||
5a03cdb7 | 3847 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3848 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3849 | |
3850 | /* Can't hold bond->lock with bh disabled here since | |
3851 | * some base drivers panic. On the other hand we can't | |
3852 | * hold bond->lock without bh disabled because we'll | |
3853 | * deadlock. The only solution is to rely on the fact | |
3854 | * that we're under rtnl_lock here, and the slaves | |
3855 | * list won't change. This doesn't solve the problem | |
3856 | * of setting the slave's MTU while it is | |
3857 | * transmitting, but the assumption is that the base | |
3858 | * driver can handle that. | |
3859 | * | |
3860 | * TODO: figure out a way to safely iterate the slaves | |
3861 | * list, but without holding a lock around the actual | |
3862 | * call to the base driver. | |
3863 | */ | |
3864 | ||
3865 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3866 | pr_debug("s %p s->p %p c_m %p\n", |
3867 | slave, | |
3868 | slave->prev, | |
3869 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3870 | |
1da177e4 LT |
3871 | res = dev_set_mtu(slave->dev, new_mtu); |
3872 | ||
3873 | if (res) { | |
3874 | /* If we failed to set the slave's mtu to the new value | |
3875 | * we must abort the operation even in ACTIVE_BACKUP | |
3876 | * mode, because if we allow the backup slaves to have | |
3877 | * different mtu values than the active slave we'll | |
3878 | * need to change their mtu when doing a failover. That | |
3879 | * means changing their mtu from timer context, which | |
3880 | * is probably not a good idea. | |
3881 | */ | |
5a03cdb7 | 3882 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3883 | goto unwind; |
3884 | } | |
3885 | } | |
3886 | ||
3887 | bond_dev->mtu = new_mtu; | |
3888 | ||
3889 | return 0; | |
3890 | ||
3891 | unwind: | |
3892 | /* unwind from head to the slave that failed */ | |
3893 | stop_at = slave; | |
3894 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3895 | int tmp_res; | |
3896 | ||
3897 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3898 | if (tmp_res) { | |
a4aee5c8 JP |
3899 | pr_debug("unwind err %d dev %s\n", |
3900 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3901 | } |
3902 | } | |
3903 | ||
3904 | return res; | |
3905 | } | |
3906 | ||
3907 | /* | |
3908 | * Change HW address | |
3909 | * | |
3910 | * Note that many devices must be down to change the HW address, and | |
3911 | * downing the master releases all slaves. We can make bonds full of | |
3912 | * bonding devices to test this, however. | |
3913 | */ | |
3914 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3915 | { | |
454d7c9b | 3916 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3917 | struct sockaddr *sa = addr, tmp_sa; |
3918 | struct slave *slave, *stop_at; | |
3919 | int res = 0; | |
3920 | int i; | |
3921 | ||
eb7cc59a SH |
3922 | if (bond->params.mode == BOND_MODE_ALB) |
3923 | return bond_alb_set_mac_address(bond_dev, addr); | |
3924 | ||
3925 | ||
a4aee5c8 JP |
3926 | pr_debug("bond=%p, name=%s\n", |
3927 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3928 | |
dd957c57 | 3929 | /* |
3915c1e8 JV |
3930 | * If fail_over_mac is set to active, do nothing and return |
3931 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3932 | */ |
3915c1e8 | 3933 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3934 | return 0; |
2ab82852 | 3935 | |
3d632c3f | 3936 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3937 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3938 | |
3939 | /* Can't hold bond->lock with bh disabled here since | |
3940 | * some base drivers panic. On the other hand we can't | |
3941 | * hold bond->lock without bh disabled because we'll | |
3942 | * deadlock. The only solution is to rely on the fact | |
3943 | * that we're under rtnl_lock here, and the slaves | |
3944 | * list won't change. This doesn't solve the problem | |
3945 | * of setting the slave's hw address while it is | |
3946 | * transmitting, but the assumption is that the base | |
3947 | * driver can handle that. | |
3948 | * | |
3949 | * TODO: figure out a way to safely iterate the slaves | |
3950 | * list, but without holding a lock around the actual | |
3951 | * call to the base driver. | |
3952 | */ | |
3953 | ||
3954 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3955 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3956 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3957 | |
eb7cc59a | 3958 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3959 | res = -EOPNOTSUPP; |
5a03cdb7 | 3960 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3961 | goto unwind; |
3962 | } | |
3963 | ||
3964 | res = dev_set_mac_address(slave->dev, addr); | |
3965 | if (res) { | |
3966 | /* TODO: consider downing the slave | |
3967 | * and retry ? | |
3968 | * User should expect communications | |
3969 | * breakage anyway until ARP finish | |
3970 | * updating, so... | |
3971 | */ | |
5a03cdb7 | 3972 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3973 | goto unwind; |
3974 | } | |
3975 | } | |
3976 | ||
3977 | /* success */ | |
3978 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3979 | return 0; | |
3980 | ||
3981 | unwind: | |
3982 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3983 | tmp_sa.sa_family = bond_dev->type; | |
3984 | ||
3985 | /* unwind from head to the slave that failed */ | |
3986 | stop_at = slave; | |
3987 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3988 | int tmp_res; | |
3989 | ||
3990 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3991 | if (tmp_res) { | |
a4aee5c8 JP |
3992 | pr_debug("unwind err %d dev %s\n", |
3993 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3994 | } |
3995 | } | |
3996 | ||
3997 | return res; | |
3998 | } | |
3999 | ||
4000 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4001 | { | |
454d7c9b | 4002 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4003 | struct slave *slave, *start_at; |
cf5f9044 | 4004 | int i, slave_no, res = 1; |
a2fd940f | 4005 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 LT |
4006 | |
4007 | read_lock(&bond->lock); | |
4008 | ||
3d632c3f | 4009 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4010 | goto out; |
cf5f9044 | 4011 | /* |
a2fd940f AG |
4012 | * Start with the curr_active_slave that joined the bond as the |
4013 | * default for sending IGMP traffic. For failover purposes one | |
4014 | * needs to maintain some consistency for the interface that will | |
4015 | * send the join/membership reports. The curr_active_slave found | |
4016 | * will send all of this type of traffic. | |
cf5f9044 | 4017 | */ |
00ae7028 | 4018 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 4019 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 4020 | |
a2fd940f AG |
4021 | read_lock(&bond->curr_slave_lock); |
4022 | slave = bond->curr_active_slave; | |
4023 | read_unlock(&bond->curr_slave_lock); | |
4024 | ||
4025 | if (!slave) | |
4026 | goto out; | |
4027 | } else { | |
4028 | /* | |
4029 | * Concurrent TX may collide on rr_tx_counter; we accept | |
4030 | * that as being rare enough not to justify using an | |
4031 | * atomic op here. | |
4032 | */ | |
4033 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
4034 | ||
4035 | bond_for_each_slave(bond, slave, i) { | |
4036 | slave_no--; | |
4037 | if (slave_no < 0) | |
4038 | break; | |
4039 | } | |
1da177e4 LT |
4040 | } |
4041 | ||
cf5f9044 | 4042 | start_at = slave; |
1da177e4 LT |
4043 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4044 | if (IS_UP(slave->dev) && | |
4045 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4046 | bond_is_active_slave(slave)) { |
1da177e4 | 4047 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
4048 | break; |
4049 | } | |
4050 | } | |
4051 | ||
1da177e4 LT |
4052 | out: |
4053 | if (res) { | |
4054 | /* no suitable interface, frame not sent */ | |
4055 | dev_kfree_skb(skb); | |
4056 | } | |
4057 | read_unlock(&bond->lock); | |
ec634fe3 | 4058 | return NETDEV_TX_OK; |
1da177e4 LT |
4059 | } |
4060 | ||
075897ce | 4061 | |
1da177e4 LT |
4062 | /* |
4063 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4064 | * the bond has a usable interface. | |
4065 | */ | |
4066 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4067 | { | |
454d7c9b | 4068 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4069 | int res = 1; |
4070 | ||
1da177e4 LT |
4071 | read_lock(&bond->lock); |
4072 | read_lock(&bond->curr_slave_lock); | |
4073 | ||
3d632c3f | 4074 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4075 | goto out; |
1da177e4 | 4076 | |
075897ce JL |
4077 | if (!bond->curr_active_slave) |
4078 | goto out; | |
4079 | ||
075897ce JL |
4080 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4081 | ||
1da177e4 | 4082 | out: |
3d632c3f | 4083 | if (res) |
1da177e4 LT |
4084 | /* no suitable interface, frame not sent */ |
4085 | dev_kfree_skb(skb); | |
3d632c3f | 4086 | |
1da177e4 LT |
4087 | read_unlock(&bond->curr_slave_lock); |
4088 | read_unlock(&bond->lock); | |
ec634fe3 | 4089 | return NETDEV_TX_OK; |
1da177e4 LT |
4090 | } |
4091 | ||
4092 | /* | |
169a3e66 JV |
4093 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4094 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4095 | * find the next active slave. | |
1da177e4 LT |
4096 | */ |
4097 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4098 | { | |
454d7c9b | 4099 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4100 | struct slave *slave, *start_at; |
4101 | int slave_no; | |
4102 | int i; | |
4103 | int res = 1; | |
4104 | ||
4105 | read_lock(&bond->lock); | |
4106 | ||
3d632c3f | 4107 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4108 | goto out; |
1da177e4 | 4109 | |
a361c83c | 4110 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4111 | |
4112 | bond_for_each_slave(bond, slave, i) { | |
4113 | slave_no--; | |
3d632c3f | 4114 | if (slave_no < 0) |
1da177e4 | 4115 | break; |
1da177e4 LT |
4116 | } |
4117 | ||
4118 | start_at = slave; | |
4119 | ||
4120 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4121 | if (IS_UP(slave->dev) && | |
4122 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4123 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4124 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4125 | break; | |
4126 | } | |
4127 | } | |
4128 | ||
4129 | out: | |
4130 | if (res) { | |
4131 | /* no suitable interface, frame not sent */ | |
4132 | dev_kfree_skb(skb); | |
4133 | } | |
4134 | read_unlock(&bond->lock); | |
ec634fe3 | 4135 | return NETDEV_TX_OK; |
1da177e4 LT |
4136 | } |
4137 | ||
4138 | /* | |
4139 | * in broadcast mode, we send everything to all usable interfaces. | |
4140 | */ | |
4141 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4142 | { | |
454d7c9b | 4143 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4144 | struct slave *slave, *start_at; |
4145 | struct net_device *tx_dev = NULL; | |
4146 | int i; | |
4147 | int res = 1; | |
4148 | ||
4149 | read_lock(&bond->lock); | |
4150 | ||
3d632c3f | 4151 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4152 | goto out; |
1da177e4 LT |
4153 | |
4154 | read_lock(&bond->curr_slave_lock); | |
4155 | start_at = bond->curr_active_slave; | |
4156 | read_unlock(&bond->curr_slave_lock); | |
4157 | ||
3d632c3f | 4158 | if (!start_at) |
1da177e4 | 4159 | goto out; |
1da177e4 LT |
4160 | |
4161 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4162 | if (IS_UP(slave->dev) && | |
4163 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4164 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4165 | if (tx_dev) { |
4166 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4167 | if (!skb2) { | |
a4aee5c8 | 4168 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4169 | bond_dev->name); |
1da177e4 LT |
4170 | continue; |
4171 | } | |
4172 | ||
4173 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4174 | if (res) { | |
4175 | dev_kfree_skb(skb2); | |
4176 | continue; | |
4177 | } | |
4178 | } | |
4179 | tx_dev = slave->dev; | |
4180 | } | |
4181 | } | |
4182 | ||
3d632c3f | 4183 | if (tx_dev) |
1da177e4 | 4184 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4185 | |
4186 | out: | |
3d632c3f | 4187 | if (res) |
1da177e4 LT |
4188 | /* no suitable interface, frame not sent */ |
4189 | dev_kfree_skb(skb); | |
3d632c3f | 4190 | |
1da177e4 LT |
4191 | /* frame sent to all suitable interfaces */ |
4192 | read_unlock(&bond->lock); | |
ec634fe3 | 4193 | return NETDEV_TX_OK; |
1da177e4 LT |
4194 | } |
4195 | ||
4196 | /*------------------------- Device initialization ---------------------------*/ | |
4197 | ||
6f6652be JV |
4198 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4199 | { | |
4200 | switch (bond->params.xmit_policy) { | |
4201 | case BOND_XMIT_POLICY_LAYER23: | |
4202 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4203 | break; | |
4204 | case BOND_XMIT_POLICY_LAYER34: | |
4205 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4206 | break; | |
4207 | case BOND_XMIT_POLICY_LAYER2: | |
4208 | default: | |
4209 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4210 | break; | |
4211 | } | |
4212 | } | |
4213 | ||
bb1d9123 AG |
4214 | /* |
4215 | * Lookup the slave that corresponds to a qid | |
4216 | */ | |
4217 | static inline int bond_slave_override(struct bonding *bond, | |
4218 | struct sk_buff *skb) | |
4219 | { | |
4220 | int i, res = 1; | |
4221 | struct slave *slave = NULL; | |
4222 | struct slave *check_slave; | |
4223 | ||
4224 | read_lock(&bond->lock); | |
4225 | ||
4226 | if (!BOND_IS_OK(bond) || !skb->queue_mapping) | |
4227 | goto out; | |
4228 | ||
4229 | /* Find out if any slaves have the same mapping as this skb. */ | |
4230 | bond_for_each_slave(bond, check_slave, i) { | |
4231 | if (check_slave->queue_id == skb->queue_mapping) { | |
4232 | slave = check_slave; | |
4233 | break; | |
4234 | } | |
4235 | } | |
4236 | ||
4237 | /* If the slave isn't UP, use default transmit policy. */ | |
4238 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4239 | (slave->link == BOND_LINK_UP)) { | |
4240 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4241 | } | |
4242 | ||
4243 | out: | |
4244 | read_unlock(&bond->lock); | |
4245 | return res; | |
4246 | } | |
4247 | ||
4248 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) | |
4249 | { | |
4250 | /* | |
4251 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4252 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4253 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4254 | * way down to the bonding driver. | |
4255 | */ | |
fd0e435b PO |
4256 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4257 | ||
4258 | if (unlikely(txq >= dev->real_num_tx_queues)) { | |
d30ee670 | 4259 | do { |
fd0e435b | 4260 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4261 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4262 | } |
4263 | return txq; | |
bb1d9123 AG |
4264 | } |
4265 | ||
424efe9c | 4266 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4267 | { |
bb1d9123 AG |
4268 | struct bonding *bond = netdev_priv(dev); |
4269 | ||
e843fa50 NH |
4270 | /* |
4271 | * If we risk deadlock from transmitting this in the | |
4272 | * netpoll path, tell netpoll to queue the frame for later tx | |
4273 | */ | |
4274 | if (is_netpoll_tx_blocked(dev)) | |
4275 | return NETDEV_TX_BUSY; | |
4276 | ||
bb1d9123 AG |
4277 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { |
4278 | if (!bond_slave_override(bond, skb)) | |
4279 | return NETDEV_TX_OK; | |
4280 | } | |
00829823 SH |
4281 | |
4282 | switch (bond->params.mode) { | |
4283 | case BOND_MODE_ROUNDROBIN: | |
4284 | return bond_xmit_roundrobin(skb, dev); | |
4285 | case BOND_MODE_ACTIVEBACKUP: | |
4286 | return bond_xmit_activebackup(skb, dev); | |
4287 | case BOND_MODE_XOR: | |
4288 | return bond_xmit_xor(skb, dev); | |
4289 | case BOND_MODE_BROADCAST: | |
4290 | return bond_xmit_broadcast(skb, dev); | |
4291 | case BOND_MODE_8023AD: | |
4292 | return bond_3ad_xmit_xor(skb, dev); | |
4293 | case BOND_MODE_ALB: | |
4294 | case BOND_MODE_TLB: | |
4295 | return bond_alb_xmit(skb, dev); | |
4296 | default: | |
4297 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4298 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4299 | dev->name, bond->params.mode); | |
00829823 SH |
4300 | WARN_ON_ONCE(1); |
4301 | dev_kfree_skb(skb); | |
4302 | return NETDEV_TX_OK; | |
4303 | } | |
4304 | } | |
4305 | ||
4306 | ||
1da177e4 LT |
4307 | /* |
4308 | * set bond mode specific net device operations | |
4309 | */ | |
a77b5325 | 4310 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4311 | { |
169a3e66 JV |
4312 | struct net_device *bond_dev = bond->dev; |
4313 | ||
1da177e4 LT |
4314 | switch (mode) { |
4315 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4316 | break; |
4317 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4318 | break; |
4319 | case BOND_MODE_XOR: | |
6f6652be | 4320 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4321 | break; |
4322 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4323 | break; |
4324 | case BOND_MODE_8023AD: | |
6f6652be | 4325 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4326 | break; |
1da177e4 | 4327 | case BOND_MODE_ALB: |
8f903c70 JV |
4328 | /* FALLTHRU */ |
4329 | case BOND_MODE_TLB: | |
1da177e4 LT |
4330 | break; |
4331 | default: | |
4332 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4333 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4334 | bond_dev->name, mode); | |
1da177e4 LT |
4335 | break; |
4336 | } | |
4337 | } | |
4338 | ||
217df670 JV |
4339 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4340 | struct ethtool_drvinfo *drvinfo) | |
4341 | { | |
4342 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4343 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4344 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4345 | } | |
4346 | ||
7282d491 | 4347 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4348 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4349 | .get_link = ethtool_op_get_link, |
4350 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4351 | .get_sg = ethtool_op_get_sg, | |
4352 | .get_tso = ethtool_op_get_tso, | |
4353 | .get_ufo = ethtool_op_get_ufo, | |
4354 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4355 | }; |
4356 | ||
eb7cc59a | 4357 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4358 | .ndo_init = bond_init, |
9e71626c | 4359 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4360 | .ndo_open = bond_open, |
4361 | .ndo_stop = bond_close, | |
00829823 | 4362 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4363 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4364 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a SH |
4365 | .ndo_do_ioctl = bond_do_ioctl, |
4366 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4367 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4368 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4369 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4370 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4371 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4372 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
f6dc31a8 | 4373 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4374 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4375 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4376 | .ndo_poll_controller = bond_poll_controller, | |
4377 | #endif | |
9232ecca JP |
4378 | .ndo_add_slave = bond_enslave, |
4379 | .ndo_del_slave = bond_release, | |
eb7cc59a SH |
4380 | }; |
4381 | ||
9e2e61fb AW |
4382 | static void bond_destructor(struct net_device *bond_dev) |
4383 | { | |
4384 | struct bonding *bond = netdev_priv(bond_dev); | |
4385 | if (bond->wq) | |
4386 | destroy_workqueue(bond->wq); | |
4387 | free_netdev(bond_dev); | |
4388 | } | |
4389 | ||
181470fc | 4390 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4391 | { |
454d7c9b | 4392 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4393 | |
1da177e4 LT |
4394 | /* initialize rwlocks */ |
4395 | rwlock_init(&bond->lock); | |
4396 | rwlock_init(&bond->curr_slave_lock); | |
4397 | ||
d2991f75 | 4398 | bond->params = bonding_defaults; |
1da177e4 LT |
4399 | |
4400 | /* Initialize pointers */ | |
1da177e4 LT |
4401 | bond->dev = bond_dev; |
4402 | INIT_LIST_HEAD(&bond->vlan_list); | |
4403 | ||
4404 | /* Initialize the device entry points */ | |
181470fc | 4405 | ether_setup(bond_dev); |
eb7cc59a | 4406 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4407 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4408 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4409 | |
9e2e61fb | 4410 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4411 | |
4412 | /* Initialize the device options */ | |
4413 | bond_dev->tx_queue_len = 0; | |
4414 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4415 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4416 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4417 | ||
1da177e4 LT |
4418 | /* At first, we block adding VLANs. That's the only way to |
4419 | * prevent problems that occur when adding VLANs over an | |
4420 | * empty bond. The block will be removed once non-challenged | |
4421 | * slaves are enslaved. | |
4422 | */ | |
4423 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4424 | ||
932ff279 | 4425 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4426 | * transmitting */ |
4427 | bond_dev->features |= NETIF_F_LLTX; | |
4428 | ||
4429 | /* By default, we declare the bond to be fully | |
4430 | * VLAN hardware accelerated capable. Special | |
4431 | * care is taken in the various xmit functions | |
4432 | * when there are slaves that are not hw accel | |
4433 | * capable | |
4434 | */ | |
1da177e4 LT |
4435 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4436 | NETIF_F_HW_VLAN_RX | | |
4437 | NETIF_F_HW_VLAN_FILTER); | |
4438 | ||
e6599c2e ED |
4439 | /* By default, we enable GRO on bonding devices. |
4440 | * Actual support requires lowlevel drivers are GRO ready. | |
4441 | */ | |
4442 | bond_dev->features |= NETIF_F_GRO; | |
1da177e4 LT |
4443 | } |
4444 | ||
fdaea7a9 JV |
4445 | static void bond_work_cancel_all(struct bonding *bond) |
4446 | { | |
4447 | write_lock_bh(&bond->lock); | |
4448 | bond->kill_timers = 1; | |
4449 | write_unlock_bh(&bond->lock); | |
4450 | ||
4451 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4452 | cancel_delayed_work(&bond->mii_work); | |
4453 | ||
4454 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4455 | cancel_delayed_work(&bond->arp_work); | |
4456 | ||
4457 | if (bond->params.mode == BOND_MODE_ALB && | |
4458 | delayed_work_pending(&bond->alb_work)) | |
4459 | cancel_delayed_work(&bond->alb_work); | |
4460 | ||
4461 | if (bond->params.mode == BOND_MODE_8023AD && | |
4462 | delayed_work_pending(&bond->ad_work)) | |
4463 | cancel_delayed_work(&bond->ad_work); | |
5a37e8ca FL |
4464 | |
4465 | if (delayed_work_pending(&bond->mcast_work)) | |
4466 | cancel_delayed_work(&bond->mcast_work); | |
fdaea7a9 JV |
4467 | } |
4468 | ||
c67dfb29 EB |
4469 | /* |
4470 | * Destroy a bonding device. | |
4471 | * Must be under rtnl_lock when this function is called. | |
4472 | */ | |
4473 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4474 | { |
454d7c9b | 4475 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4476 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4477 | |
f6dc31a8 WC |
4478 | bond_netpoll_cleanup(bond_dev); |
4479 | ||
c67dfb29 EB |
4480 | /* Release the bonded slaves */ |
4481 | bond_release_all(bond_dev); | |
4482 | ||
a434e43f JV |
4483 | list_del(&bond->bond_list); |
4484 | ||
4485 | bond_work_cancel_all(bond); | |
4486 | ||
a434e43f | 4487 | bond_remove_proc_entry(bond); |
c67dfb29 | 4488 | |
f073c7ca TI |
4489 | bond_debug_unregister(bond); |
4490 | ||
22bedad3 | 4491 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4492 | |
4493 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4494 | list_del(&vlan->vlan_list); | |
4495 | kfree(vlan); | |
4496 | } | |
a434e43f JV |
4497 | } |
4498 | ||
1da177e4 LT |
4499 | /*------------------------- Module initialization ---------------------------*/ |
4500 | ||
4501 | /* | |
4502 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4503 | * number of the mode or its string name. A bit complicated because |
4504 | * some mode names are substrings of other names, and calls from sysfs | |
4505 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4506 | */ |
325dcf7a | 4507 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4508 | { |
54b87323 | 4509 | int modeint = -1, i, rv; |
a42e534f | 4510 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4511 | |
a42e534f JV |
4512 | for (p = (char *)buf; *p; p++) |
4513 | if (!(isdigit(*p) || isspace(*p))) | |
4514 | break; | |
4515 | ||
4516 | if (*p) | |
ece95f7f | 4517 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4518 | else |
54b87323 | 4519 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4520 | |
4521 | if (!rv) | |
4522 | return -1; | |
1da177e4 LT |
4523 | |
4524 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4525 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4526 | return tbl[i].mode; |
4527 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4528 | return tbl[i].mode; |
1da177e4 LT |
4529 | } |
4530 | ||
4531 | return -1; | |
4532 | } | |
4533 | ||
4534 | static int bond_check_params(struct bond_params *params) | |
4535 | { | |
a549952a | 4536 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4537 | |
1da177e4 LT |
4538 | /* |
4539 | * Convert string parameters. | |
4540 | */ | |
4541 | if (mode) { | |
4542 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4543 | if (bond_mode == -1) { | |
a4aee5c8 | 4544 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4545 | mode == NULL ? "NULL" : mode); |
4546 | return -EINVAL; | |
4547 | } | |
4548 | } | |
4549 | ||
169a3e66 JV |
4550 | if (xmit_hash_policy) { |
4551 | if ((bond_mode != BOND_MODE_XOR) && | |
4552 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4553 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4554 | bond_mode_name(bond_mode)); |
4555 | } else { | |
4556 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4557 | xmit_hashtype_tbl); | |
4558 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4559 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4560 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4561 | xmit_hash_policy); |
4562 | return -EINVAL; | |
4563 | } | |
4564 | } | |
4565 | } | |
4566 | ||
1da177e4 LT |
4567 | if (lacp_rate) { |
4568 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4569 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4570 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4571 | } else { |
4572 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4573 | if (lacp_fast == -1) { | |
a4aee5c8 | 4574 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4575 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4576 | return -EINVAL; | |
4577 | } | |
4578 | } | |
4579 | } | |
4580 | ||
fd989c83 JV |
4581 | if (ad_select) { |
4582 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4583 | if (params->ad_select == -1) { | |
a4aee5c8 | 4584 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4585 | ad_select == NULL ? "NULL" : ad_select); |
4586 | return -EINVAL; | |
4587 | } | |
4588 | ||
4589 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4590 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4591 | } |
4592 | } else { | |
4593 | params->ad_select = BOND_AD_STABLE; | |
4594 | } | |
4595 | ||
f5841306 | 4596 | if (max_bonds < 0) { |
a4aee5c8 JP |
4597 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4598 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4599 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4600 | } | |
4601 | ||
4602 | if (miimon < 0) { | |
a4aee5c8 JP |
4603 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4604 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4605 | miimon = BOND_LINK_MON_INTERV; |
4606 | } | |
4607 | ||
4608 | if (updelay < 0) { | |
a4aee5c8 JP |
4609 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4610 | updelay, INT_MAX); | |
1da177e4 LT |
4611 | updelay = 0; |
4612 | } | |
4613 | ||
4614 | if (downdelay < 0) { | |
a4aee5c8 JP |
4615 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4616 | downdelay, INT_MAX); | |
1da177e4 LT |
4617 | downdelay = 0; |
4618 | } | |
4619 | ||
4620 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4621 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4622 | use_carrier); | |
1da177e4 LT |
4623 | use_carrier = 1; |
4624 | } | |
4625 | ||
ad246c99 BH |
4626 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4627 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4628 | num_peer_notif); | |
4629 | num_peer_notif = 1; | |
4630 | } | |
4631 | ||
1da177e4 LT |
4632 | /* reset values for 802.3ad */ |
4633 | if (bond_mode == BOND_MODE_8023AD) { | |
4634 | if (!miimon) { | |
a4aee5c8 | 4635 | 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 | 4636 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4637 | miimon = 100; |
4638 | } | |
4639 | } | |
4640 | ||
bb1d9123 AG |
4641 | if (tx_queues < 1 || tx_queues > 255) { |
4642 | pr_warning("Warning: tx_queues (%d) should be between " | |
4643 | "1 and 255, resetting to %d\n", | |
4644 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4645 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4646 | } | |
4647 | ||
ebd8e497 AG |
4648 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4649 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4650 | "not of valid value (0/1), so it was set to " | |
4651 | "0\n", all_slaves_active); | |
4652 | all_slaves_active = 0; | |
4653 | } | |
4654 | ||
c2952c31 FL |
4655 | if (resend_igmp < 0 || resend_igmp > 255) { |
4656 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4657 | "0 and 255, resetting to %d\n", | |
4658 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4659 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4660 | } | |
4661 | ||
1da177e4 LT |
4662 | /* reset values for TLB/ALB */ |
4663 | if ((bond_mode == BOND_MODE_TLB) || | |
4664 | (bond_mode == BOND_MODE_ALB)) { | |
4665 | if (!miimon) { | |
a4aee5c8 | 4666 | 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 | 4667 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4668 | miimon = 100; |
4669 | } | |
4670 | } | |
4671 | ||
4672 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4673 | 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", |
4674 | updelay); | |
1da177e4 LT |
4675 | } |
4676 | ||
4677 | if (!miimon) { | |
4678 | if (updelay || downdelay) { | |
4679 | /* just warn the user the up/down delay will have | |
4680 | * no effect since miimon is zero... | |
4681 | */ | |
a4aee5c8 JP |
4682 | 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", |
4683 | updelay, downdelay); | |
1da177e4 LT |
4684 | } |
4685 | } else { | |
4686 | /* don't allow arp monitoring */ | |
4687 | if (arp_interval) { | |
a4aee5c8 JP |
4688 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4689 | miimon, arp_interval); | |
1da177e4 LT |
4690 | arp_interval = 0; |
4691 | } | |
4692 | ||
4693 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4694 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4695 | updelay, miimon, | |
4696 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4697 | } |
4698 | ||
4699 | updelay /= miimon; | |
4700 | ||
4701 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4702 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4703 | downdelay, miimon, | |
4704 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4705 | } |
4706 | ||
4707 | downdelay /= miimon; | |
4708 | } | |
4709 | ||
4710 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4711 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4712 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4713 | arp_interval = BOND_LINK_ARP_INTERV; |
4714 | } | |
4715 | ||
4716 | for (arp_ip_count = 0; | |
4717 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4718 | arp_ip_count++) { | |
4719 | /* not complete check, but should be good enough to | |
4720 | catch mistakes */ | |
4721 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4722 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4723 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4724 | arp_interval = 0; |
4725 | } else { | |
d3bb52b0 | 4726 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4727 | arp_target[arp_ip_count] = ip; |
4728 | } | |
4729 | } | |
4730 | ||
4731 | if (arp_interval && !arp_ip_count) { | |
4732 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4733 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4734 | arp_interval); | |
1da177e4 LT |
4735 | arp_interval = 0; |
4736 | } | |
4737 | ||
f5b2b966 JV |
4738 | if (arp_validate) { |
4739 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4740 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4741 | return -EINVAL; |
4742 | } | |
4743 | if (!arp_interval) { | |
a4aee5c8 | 4744 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4745 | return -EINVAL; |
4746 | } | |
4747 | ||
4748 | arp_validate_value = bond_parse_parm(arp_validate, | |
4749 | arp_validate_tbl); | |
4750 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4751 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4752 | arp_validate == NULL ? "NULL" : arp_validate); |
4753 | return -EINVAL; | |
4754 | } | |
4755 | } else | |
4756 | arp_validate_value = 0; | |
4757 | ||
1da177e4 | 4758 | if (miimon) { |
a4aee5c8 | 4759 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4760 | } else if (arp_interval) { |
4761 | int i; | |
4762 | ||
a4aee5c8 JP |
4763 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4764 | arp_interval, | |
4765 | arp_validate_tbl[arp_validate_value].modename, | |
4766 | arp_ip_count); | |
1da177e4 LT |
4767 | |
4768 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4769 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4770 | |
e5e2a8fd | 4771 | pr_info("\n"); |
1da177e4 | 4772 | |
b8a9787e | 4773 | } else if (max_bonds) { |
1da177e4 LT |
4774 | /* miimon and arp_interval not set, we need one so things |
4775 | * work as expected, see bonding.txt for details | |
4776 | */ | |
a4aee5c8 | 4777 | pr_warning("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n"); |
1da177e4 LT |
4778 | } |
4779 | ||
4780 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4781 | /* currently, using a primary only makes sense | |
4782 | * in active backup, TLB or ALB modes | |
4783 | */ | |
a4aee5c8 JP |
4784 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4785 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4786 | primary = NULL; |
4787 | } | |
4788 | ||
a549952a JP |
4789 | if (primary && primary_reselect) { |
4790 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4791 | pri_reselect_tbl); | |
4792 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4793 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4794 | primary_reselect == |
4795 | NULL ? "NULL" : primary_reselect); | |
4796 | return -EINVAL; | |
4797 | } | |
4798 | } else { | |
4799 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4800 | } | |
4801 | ||
3915c1e8 JV |
4802 | if (fail_over_mac) { |
4803 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4804 | fail_over_mac_tbl); | |
4805 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4806 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4807 | arp_validate == NULL ? "NULL" : arp_validate); |
4808 | return -EINVAL; | |
4809 | } | |
4810 | ||
4811 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4812 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4813 | } else { |
4814 | fail_over_mac_value = BOND_FOM_NONE; | |
4815 | } | |
dd957c57 | 4816 | |
1da177e4 LT |
4817 | /* fill params struct with the proper values */ |
4818 | params->mode = bond_mode; | |
169a3e66 | 4819 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4820 | params->miimon = miimon; |
ad246c99 | 4821 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4822 | params->arp_interval = arp_interval; |
f5b2b966 | 4823 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4824 | params->updelay = updelay; |
4825 | params->downdelay = downdelay; | |
4826 | params->use_carrier = use_carrier; | |
4827 | params->lacp_fast = lacp_fast; | |
4828 | params->primary[0] = 0; | |
a549952a | 4829 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4830 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4831 | params->tx_queues = tx_queues; |
ebd8e497 | 4832 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4833 | params->resend_igmp = resend_igmp; |
1da177e4 LT |
4834 | |
4835 | if (primary) { | |
4836 | strncpy(params->primary, primary, IFNAMSIZ); | |
4837 | params->primary[IFNAMSIZ - 1] = 0; | |
4838 | } | |
4839 | ||
4840 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4841 | ||
4842 | return 0; | |
4843 | } | |
4844 | ||
0daa2303 | 4845 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4846 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4847 | |
e8a0464c DM |
4848 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4849 | struct netdev_queue *txq, | |
4850 | void *_unused) | |
c773e847 DM |
4851 | { |
4852 | lockdep_set_class(&txq->_xmit_lock, | |
4853 | &bonding_netdev_xmit_lock_key); | |
4854 | } | |
4855 | ||
4856 | static void bond_set_lockdep_class(struct net_device *dev) | |
4857 | { | |
cf508b12 DM |
4858 | lockdep_set_class(&dev->addr_list_lock, |
4859 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4860 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4861 | } |
4862 | ||
181470fc SH |
4863 | /* |
4864 | * Called from registration process | |
4865 | */ | |
4866 | static int bond_init(struct net_device *bond_dev) | |
4867 | { | |
4868 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4869 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
181470fc SH |
4870 | |
4871 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4872 | ||
4873 | bond->wq = create_singlethread_workqueue(bond_dev->name); | |
4874 | if (!bond->wq) | |
4875 | return -ENOMEM; | |
4876 | ||
4877 | bond_set_lockdep_class(bond_dev); | |
4878 | ||
181470fc | 4879 | bond_create_proc_entry(bond); |
ec87fd3b | 4880 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4881 | |
6151b3d4 | 4882 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4883 | |
f073c7ca TI |
4884 | bond_debug_register(bond); |
4885 | ||
22bedad3 | 4886 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4887 | return 0; |
4888 | } | |
4889 | ||
88ead977 EB |
4890 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4891 | { | |
4892 | if (tb[IFLA_ADDRESS]) { | |
4893 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4894 | return -EINVAL; | |
4895 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4896 | return -EADDRNOTAVAIL; | |
4897 | } | |
4898 | return 0; | |
4899 | } | |
4900 | ||
4901 | static struct rtnl_link_ops bond_link_ops __read_mostly = { | |
4902 | .kind = "bond", | |
6639104b | 4903 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4904 | .setup = bond_setup, |
4905 | .validate = bond_validate, | |
4906 | }; | |
4907 | ||
dfe60397 | 4908 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4909 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4910 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4911 | * set up our sysfs entries. | |
4912 | */ | |
ec87fd3b | 4913 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4914 | { |
4915 | struct net_device *bond_dev; | |
4916 | int res; | |
4917 | ||
4918 | rtnl_lock(); | |
027ea041 | 4919 | |
1c5cae81 JP |
4920 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4921 | name ? name : "bond%d", | |
4922 | bond_setup, tx_queues); | |
dfe60397 | 4923 | if (!bond_dev) { |
a4aee5c8 | 4924 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4925 | rtnl_unlock(); |
4926 | return -ENOMEM; | |
dfe60397 MW |
4927 | } |
4928 | ||
ec87fd3b | 4929 | dev_net_set(bond_dev, net); |
88ead977 EB |
4930 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4931 | ||
dfe60397 | 4932 | res = register_netdevice(bond_dev); |
0daa2303 | 4933 | |
e826eafa PO |
4934 | netif_carrier_off(bond_dev); |
4935 | ||
7e083840 | 4936 | rtnl_unlock(); |
9e2e61fb AW |
4937 | if (res < 0) |
4938 | bond_destructor(bond_dev); | |
30c15ba9 | 4939 | return res; |
dfe60397 MW |
4940 | } |
4941 | ||
2c8c1e72 | 4942 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4943 | { |
15449745 | 4944 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4945 | |
4946 | bn->net = net; | |
4947 | INIT_LIST_HEAD(&bn->dev_list); | |
4948 | ||
ec87fd3b | 4949 | bond_create_proc_dir(bn); |
15449745 EB |
4950 | |
4951 | return 0; | |
ec87fd3b EB |
4952 | } |
4953 | ||
2c8c1e72 | 4954 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4955 | { |
15449745 | 4956 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4957 | |
4958 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
4959 | } |
4960 | ||
4961 | static struct pernet_operations bond_net_ops = { | |
4962 | .init = bond_net_init, | |
4963 | .exit = bond_net_exit, | |
15449745 EB |
4964 | .id = &bond_net_id, |
4965 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4966 | }; |
4967 | ||
1da177e4 LT |
4968 | static int __init bonding_init(void) |
4969 | { | |
1da177e4 LT |
4970 | int i; |
4971 | int res; | |
4972 | ||
bd33acc3 | 4973 | pr_info("%s", bond_version); |
1da177e4 | 4974 | |
dfe60397 | 4975 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4976 | if (res) |
dfe60397 | 4977 | goto out; |
1da177e4 | 4978 | |
15449745 | 4979 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4980 | if (res) |
4981 | goto out; | |
027ea041 | 4982 | |
88ead977 EB |
4983 | res = rtnl_link_register(&bond_link_ops); |
4984 | if (res) | |
6639104b | 4985 | goto err_link; |
88ead977 | 4986 | |
f073c7ca TI |
4987 | bond_create_debugfs(); |
4988 | ||
1da177e4 | 4989 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4990 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4991 | if (res) |
4992 | goto err; | |
1da177e4 LT |
4993 | } |
4994 | ||
b76cdba9 MW |
4995 | res = bond_create_sysfs(); |
4996 | if (res) | |
4997 | goto err; | |
4998 | ||
1da177e4 | 4999 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5000 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
dfe60397 | 5001 | out: |
1da177e4 | 5002 | return res; |
88ead977 EB |
5003 | err: |
5004 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 5005 | err_link: |
15449745 | 5006 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 5007 | goto out; |
dfe60397 | 5008 | |
1da177e4 LT |
5009 | } |
5010 | ||
5011 | static void __exit bonding_exit(void) | |
5012 | { | |
5013 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5014 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 5015 | |
ae68c398 | 5016 | bond_destroy_sysfs(); |
f073c7ca | 5017 | bond_destroy_debugfs(); |
ae68c398 | 5018 | |
88ead977 | 5019 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 5020 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
5021 | |
5022 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
5023 | /* |
5024 | * Make sure we don't have an imbalance on our netpoll blocking | |
5025 | */ | |
5026 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 5027 | #endif |
1da177e4 LT |
5028 | } |
5029 | ||
5030 | module_init(bonding_init); | |
5031 | module_exit(bonding_exit); | |
5032 | MODULE_LICENSE("GPL"); | |
5033 | MODULE_VERSION(DRV_VERSION); | |
5034 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5035 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5036 | MODULE_ALIAS_RTNL_LINK("bond"); |