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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> | |
68 | #include <linux/proc_fs.h> | |
69 | #include <linux/seq_file.h> | |
70 | #include <linux/smp.h> | |
71 | #include <linux/if_ether.h> | |
72 | #include <net/arp.h> | |
73 | #include <linux/mii.h> | |
74 | #include <linux/ethtool.h> | |
75 | #include <linux/if_vlan.h> | |
76 | #include <linux/if_bonding.h> | |
b63bb739 | 77 | #include <linux/jiffies.h> |
c3ade5ca | 78 | #include <net/route.h> |
457c4cbc | 79 | #include <net/net_namespace.h> |
ec87fd3b | 80 | #include <net/netns/generic.h> |
1da177e4 LT |
81 | #include "bonding.h" |
82 | #include "bond_3ad.h" | |
83 | #include "bond_alb.h" | |
84 | ||
85 | /*---------------------------- Module parameters ----------------------------*/ | |
86 | ||
87 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
88 | #define BOND_LINK_MON_INTERV 0 | |
89 | #define BOND_LINK_ARP_INTERV 0 | |
90 | ||
91 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
7893b249 | 92 | static int num_grat_arp = 1; |
305d552a | 93 | static int num_unsol_na = 1; |
1da177e4 | 94 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
95 | static int updelay; |
96 | static int downdelay; | |
1da177e4 | 97 | static int use_carrier = 1; |
3d632c3f SH |
98 | static char *mode; |
99 | static char *primary; | |
a549952a | 100 | static char *primary_reselect; |
3d632c3f SH |
101 | static char *lacp_rate; |
102 | static char *ad_select; | |
103 | static char *xmit_hash_policy; | |
1da177e4 | 104 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
105 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
106 | static char *arp_validate; | |
107 | static char *fail_over_mac; | |
d2991f75 | 108 | static struct bond_params bonding_defaults; |
1da177e4 LT |
109 | |
110 | module_param(max_bonds, int, 0); | |
111 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
7893b249 MS |
112 | module_param(num_grat_arp, int, 0644); |
113 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
305d552a BH |
114 | module_param(num_unsol_na, int, 0644); |
115 | MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event"); | |
1da177e4 LT |
116 | module_param(miimon, int, 0); |
117 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
118 | module_param(updelay, int, 0); | |
119 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
120 | module_param(downdelay, int, 0); | |
2ac47660 MW |
121 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
122 | "in milliseconds"); | |
1da177e4 | 123 | module_param(use_carrier, int, 0); |
2ac47660 MW |
124 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
125 | "0 for off, 1 for on (default)"); | |
1da177e4 | 126 | module_param(mode, charp, 0); |
2ac47660 MW |
127 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
128 | "1 for active-backup, 2 for balance-xor, " | |
129 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
130 | "6 for balance-alb"); | |
1da177e4 LT |
131 | module_param(primary, charp, 0); |
132 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
133 | module_param(primary_reselect, charp, 0); |
134 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
135 | "once it comes up; " | |
136 | "0 for always (default), " | |
137 | "1 for only if speed of primary is " | |
138 | "better, " | |
139 | "2 for only on active slave " | |
140 | "failure"); | |
1da177e4 | 141 | module_param(lacp_rate, charp, 0); |
2ac47660 MW |
142 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
143 | "(slow/fast)"); | |
fd989c83 JV |
144 | module_param(ad_select, charp, 0); |
145 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 146 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
147 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
148 | ", 1 for layer 3+4"); | |
1da177e4 LT |
149 | module_param(arp_interval, int, 0); |
150 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
151 | module_param_array(arp_ip_target, charp, NULL, 0); | |
152 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
153 | module_param(arp_validate, charp, 0); |
154 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
155 | module_param(fail_over_mac, charp, 0); |
156 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
1da177e4 LT |
157 | |
158 | /*----------------------------- Global variables ----------------------------*/ | |
159 | ||
f71e1309 | 160 | static const char * const version = |
1da177e4 LT |
161 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
162 | ||
f99189b1 | 163 | int bond_net_id __read_mostly; |
1da177e4 | 164 | |
3d632c3f SH |
165 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
166 | static int arp_ip_count; | |
1da177e4 | 167 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
168 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
169 | static int lacp_fast; | |
217df670 | 170 | |
1da177e4 | 171 | |
e97fd7c6 | 172 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
173 | { "slow", AD_LACP_SLOW}, |
174 | { "fast", AD_LACP_FAST}, | |
175 | { NULL, -1}, | |
176 | }; | |
177 | ||
e97fd7c6 | 178 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
179 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
180 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
181 | { "balance-xor", BOND_MODE_XOR}, | |
182 | { "broadcast", BOND_MODE_BROADCAST}, | |
183 | { "802.3ad", BOND_MODE_8023AD}, | |
184 | { "balance-tlb", BOND_MODE_TLB}, | |
185 | { "balance-alb", BOND_MODE_ALB}, | |
186 | { NULL, -1}, | |
187 | }; | |
188 | ||
e97fd7c6 | 189 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
190 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
191 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 192 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
193 | { NULL, -1}, |
194 | }; | |
195 | ||
e97fd7c6 | 196 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
197 | { "none", BOND_ARP_VALIDATE_NONE}, |
198 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
199 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
200 | { "all", BOND_ARP_VALIDATE_ALL}, | |
201 | { NULL, -1}, | |
202 | }; | |
203 | ||
e97fd7c6 | 204 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
205 | { "none", BOND_FOM_NONE}, |
206 | { "active", BOND_FOM_ACTIVE}, | |
207 | { "follow", BOND_FOM_FOLLOW}, | |
208 | { NULL, -1}, | |
209 | }; | |
210 | ||
a549952a JP |
211 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
212 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
213 | { "better", BOND_PRI_RESELECT_BETTER}, | |
214 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
215 | { NULL, -1}, | |
216 | }; | |
217 | ||
fd989c83 JV |
218 | struct bond_parm_tbl ad_select_tbl[] = { |
219 | { "stable", BOND_AD_STABLE}, | |
220 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
221 | { "count", BOND_AD_COUNT}, | |
222 | { NULL, -1}, | |
223 | }; | |
224 | ||
1da177e4 LT |
225 | /*-------------------------- Forward declarations ---------------------------*/ |
226 | ||
c3ade5ca | 227 | static void bond_send_gratuitous_arp(struct bonding *bond); |
181470fc | 228 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 229 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
230 | |
231 | /*---------------------------- General routines -----------------------------*/ | |
232 | ||
4ad072c9 | 233 | static const char *bond_mode_name(int mode) |
1da177e4 | 234 | { |
77afc92b HE |
235 | static const char *names[] = { |
236 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
237 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
238 | [BOND_MODE_XOR] = "load balancing (xor)", | |
239 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 240 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
241 | [BOND_MODE_TLB] = "transmit load balancing", |
242 | [BOND_MODE_ALB] = "adaptive load balancing", | |
243 | }; | |
244 | ||
245 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 246 | return "unknown"; |
77afc92b HE |
247 | |
248 | return names[mode]; | |
1da177e4 LT |
249 | } |
250 | ||
251 | /*---------------------------------- VLAN -----------------------------------*/ | |
252 | ||
253 | /** | |
254 | * bond_add_vlan - add a new vlan id on bond | |
255 | * @bond: bond that got the notification | |
256 | * @vlan_id: the vlan id to add | |
257 | * | |
258 | * Returns -ENOMEM if allocation failed. | |
259 | */ | |
260 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
261 | { | |
262 | struct vlan_entry *vlan; | |
263 | ||
5a03cdb7 | 264 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 265 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 266 | |
305d552a | 267 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 268 | if (!vlan) |
1da177e4 | 269 | return -ENOMEM; |
1da177e4 LT |
270 | |
271 | INIT_LIST_HEAD(&vlan->vlan_list); | |
272 | vlan->vlan_id = vlan_id; | |
273 | ||
274 | write_lock_bh(&bond->lock); | |
275 | ||
276 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
277 | ||
278 | write_unlock_bh(&bond->lock); | |
279 | ||
5a03cdb7 | 280 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
281 | |
282 | return 0; | |
283 | } | |
284 | ||
285 | /** | |
286 | * bond_del_vlan - delete a vlan id from bond | |
287 | * @bond: bond that got the notification | |
288 | * @vlan_id: the vlan id to delete | |
289 | * | |
290 | * returns -ENODEV if @vlan_id was not found in @bond. | |
291 | */ | |
292 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
293 | { | |
0883beca | 294 | struct vlan_entry *vlan; |
1da177e4 LT |
295 | int res = -ENODEV; |
296 | ||
5a03cdb7 | 297 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 LT |
298 | |
299 | write_lock_bh(&bond->lock); | |
300 | ||
0883beca | 301 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
302 | if (vlan->vlan_id == vlan_id) { |
303 | list_del(&vlan->vlan_list); | |
304 | ||
58402054 | 305 | if (bond_is_lb(bond)) |
1da177e4 | 306 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 307 | |
a4aee5c8 JP |
308 | pr_debug("removed VLAN ID %d from bond %s\n", |
309 | vlan_id, bond->dev->name); | |
1da177e4 LT |
310 | |
311 | kfree(vlan); | |
312 | ||
313 | if (list_empty(&bond->vlan_list) && | |
314 | (bond->slave_cnt == 0)) { | |
315 | /* Last VLAN removed and no slaves, so | |
316 | * restore block on adding VLANs. This will | |
317 | * be removed once new slaves that are not | |
318 | * VLAN challenged will be added. | |
319 | */ | |
320 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
321 | } | |
322 | ||
323 | res = 0; | |
324 | goto out; | |
325 | } | |
326 | } | |
327 | ||
a4aee5c8 JP |
328 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
329 | vlan_id, bond->dev->name); | |
1da177e4 LT |
330 | |
331 | out: | |
332 | write_unlock_bh(&bond->lock); | |
333 | return res; | |
334 | } | |
335 | ||
336 | /** | |
337 | * bond_has_challenged_slaves | |
338 | * @bond: the bond we're working on | |
339 | * | |
340 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
341 | * was found, 0 otherwise. | |
342 | * | |
343 | * Assumes bond->lock is held. | |
344 | */ | |
345 | static int bond_has_challenged_slaves(struct bonding *bond) | |
346 | { | |
347 | struct slave *slave; | |
348 | int i; | |
349 | ||
350 | bond_for_each_slave(bond, slave, i) { | |
351 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 352 | pr_debug("found VLAN challenged slave - %s\n", |
a4aee5c8 | 353 | slave->dev->name); |
1da177e4 LT |
354 | return 1; |
355 | } | |
356 | } | |
357 | ||
5a03cdb7 | 358 | pr_debug("no VLAN challenged slaves found\n"); |
1da177e4 LT |
359 | return 0; |
360 | } | |
361 | ||
362 | /** | |
363 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
364 | * @bond: the bond we're working on | |
365 | * @curr: item we're advancing from | |
366 | * | |
367 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
368 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 369 | * |
1da177e4 LT |
370 | * Caller must hold bond->lock |
371 | */ | |
372 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
373 | { | |
374 | struct vlan_entry *next, *last; | |
375 | ||
3d632c3f | 376 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 377 | return NULL; |
1da177e4 LT |
378 | |
379 | if (!curr) { | |
380 | next = list_entry(bond->vlan_list.next, | |
381 | struct vlan_entry, vlan_list); | |
382 | } else { | |
383 | last = list_entry(bond->vlan_list.prev, | |
384 | struct vlan_entry, vlan_list); | |
385 | if (last == curr) { | |
386 | next = list_entry(bond->vlan_list.next, | |
387 | struct vlan_entry, vlan_list); | |
388 | } else { | |
389 | next = list_entry(curr->vlan_list.next, | |
390 | struct vlan_entry, vlan_list); | |
391 | } | |
392 | } | |
393 | ||
394 | return next; | |
395 | } | |
396 | ||
397 | /** | |
398 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 399 | * |
1da177e4 LT |
400 | * @bond: bond device that got this skb for tx. |
401 | * @skb: hw accel VLAN tagged skb to transmit | |
402 | * @slave_dev: slave that is supposed to xmit this skbuff | |
3d632c3f | 403 | * |
1da177e4 LT |
404 | * When the bond gets an skb to transmit that is |
405 | * already hardware accelerated VLAN tagged, and it | |
406 | * needs to relay this skb to a slave that is not | |
407 | * hw accel capable, the skb needs to be "unaccelerated", | |
408 | * i.e. strip the hwaccel tag and re-insert it as part | |
409 | * of the payload. | |
410 | */ | |
3d632c3f SH |
411 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
412 | struct net_device *slave_dev) | |
1da177e4 | 413 | { |
966bc6f4 | 414 | unsigned short uninitialized_var(vlan_id); |
1da177e4 LT |
415 | |
416 | if (!list_empty(&bond->vlan_list) && | |
417 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
418 | vlan_get_tag(skb, &vlan_id) == 0) { | |
419 | skb->dev = slave_dev; | |
420 | skb = vlan_put_tag(skb, vlan_id); | |
421 | if (!skb) { | |
422 | /* vlan_put_tag() frees the skb in case of error, | |
423 | * so return success here so the calling functions | |
424 | * won't attempt to free is again. | |
425 | */ | |
426 | return 0; | |
427 | } | |
428 | } else { | |
429 | skb->dev = slave_dev; | |
430 | } | |
431 | ||
432 | skb->priority = 1; | |
433 | dev_queue_xmit(skb); | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
438 | /* | |
439 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
440 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
441 | * lock because: | |
442 | * a. This operation is performed in IOCTL context, | |
443 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
444 | * c. Holding a lock with BH disabled while directly calling a base driver | |
445 | * entry point is generally a BAD idea. | |
3d632c3f | 446 | * |
1da177e4 LT |
447 | * The design of synchronization/protection for this operation in the 8021q |
448 | * module is good for one or more VLAN devices over a single physical device | |
449 | * and cannot be extended for a teaming solution like bonding, so there is a | |
450 | * potential race condition here where a net device from the vlan group might | |
451 | * be referenced (either by a base driver or the 8021q code) while it is being | |
452 | * removed from the system. However, it turns out we're not making matters | |
453 | * worse, and if it works for regular VLAN usage it will work here too. | |
454 | */ | |
455 | ||
456 | /** | |
457 | * bond_vlan_rx_register - Propagates registration to slaves | |
458 | * @bond_dev: bonding net device that got called | |
459 | * @grp: vlan group being registered | |
460 | */ | |
3d632c3f SH |
461 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
462 | struct vlan_group *grp) | |
1da177e4 | 463 | { |
454d7c9b | 464 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
465 | struct slave *slave; |
466 | int i; | |
467 | ||
468 | bond->vlgrp = grp; | |
469 | ||
470 | bond_for_each_slave(bond, slave, i) { | |
471 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 472 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
473 | |
474 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
475 | slave_ops->ndo_vlan_rx_register) { |
476 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
477 | } |
478 | } | |
479 | } | |
480 | ||
481 | /** | |
482 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
483 | * @bond_dev: bonding net device that got called | |
484 | * @vid: vlan id being added | |
485 | */ | |
486 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
487 | { | |
454d7c9b | 488 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
489 | struct slave *slave; |
490 | int i, res; | |
491 | ||
492 | bond_for_each_slave(bond, slave, i) { | |
493 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 494 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
495 | |
496 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
497 | slave_ops->ndo_vlan_rx_add_vid) { |
498 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
499 | } |
500 | } | |
501 | ||
502 | res = bond_add_vlan(bond, vid); | |
503 | if (res) { | |
a4aee5c8 | 504 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
505 | bond_dev->name, vid); |
506 | } | |
507 | } | |
508 | ||
509 | /** | |
510 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
511 | * @bond_dev: bonding net device that got called | |
512 | * @vid: vlan id being removed | |
513 | */ | |
514 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
515 | { | |
454d7c9b | 516 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
517 | struct slave *slave; |
518 | struct net_device *vlan_dev; | |
519 | int i, res; | |
520 | ||
521 | bond_for_each_slave(bond, slave, i) { | |
522 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 523 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
524 | |
525 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 526 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
527 | /* Save and then restore vlan_dev in the grp array, |
528 | * since the slave's driver might clear it. | |
529 | */ | |
5c15bdec | 530 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 531 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 532 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
533 | } |
534 | } | |
535 | ||
536 | res = bond_del_vlan(bond, vid); | |
537 | if (res) { | |
a4aee5c8 | 538 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
539 | bond_dev->name, vid); |
540 | } | |
541 | } | |
542 | ||
543 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
544 | { | |
545 | struct vlan_entry *vlan; | |
eb7cc59a | 546 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
547 | |
548 | write_lock_bh(&bond->lock); | |
549 | ||
eb7cc59a | 550 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 551 | goto out; |
1da177e4 LT |
552 | |
553 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
554 | slave_ops->ndo_vlan_rx_register) |
555 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
556 | |
557 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 558 | !(slave_ops->ndo_vlan_rx_add_vid)) |
1da177e4 | 559 | goto out; |
1da177e4 | 560 | |
eb7cc59a SH |
561 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
562 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
563 | |
564 | out: | |
565 | write_unlock_bh(&bond->lock); | |
566 | } | |
567 | ||
3d632c3f SH |
568 | static void bond_del_vlans_from_slave(struct bonding *bond, |
569 | struct net_device *slave_dev) | |
1da177e4 | 570 | { |
eb7cc59a | 571 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
572 | struct vlan_entry *vlan; |
573 | struct net_device *vlan_dev; | |
574 | ||
575 | write_lock_bh(&bond->lock); | |
576 | ||
eb7cc59a | 577 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 578 | goto out; |
1da177e4 LT |
579 | |
580 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 581 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 582 | goto unreg; |
1da177e4 LT |
583 | |
584 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
585 | /* Save and then restore vlan_dev in the grp array, | |
586 | * since the slave's driver might clear it. | |
587 | */ | |
5c15bdec | 588 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 589 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 590 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
591 | } |
592 | ||
593 | unreg: | |
594 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
595 | slave_ops->ndo_vlan_rx_register) |
596 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
597 | |
598 | out: | |
599 | write_unlock_bh(&bond->lock); | |
600 | } | |
601 | ||
602 | /*------------------------------- Link status -------------------------------*/ | |
603 | ||
ff59c456 JV |
604 | /* |
605 | * Set the carrier state for the master according to the state of its | |
606 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
607 | * do special 802.3ad magic. | |
608 | * | |
609 | * Returns zero if carrier state does not change, nonzero if it does. | |
610 | */ | |
611 | static int bond_set_carrier(struct bonding *bond) | |
612 | { | |
613 | struct slave *slave; | |
614 | int i; | |
615 | ||
616 | if (bond->slave_cnt == 0) | |
617 | goto down; | |
618 | ||
619 | if (bond->params.mode == BOND_MODE_8023AD) | |
620 | return bond_3ad_set_carrier(bond); | |
621 | ||
622 | bond_for_each_slave(bond, slave, i) { | |
623 | if (slave->link == BOND_LINK_UP) { | |
624 | if (!netif_carrier_ok(bond->dev)) { | |
625 | netif_carrier_on(bond->dev); | |
626 | return 1; | |
627 | } | |
628 | return 0; | |
629 | } | |
630 | } | |
631 | ||
632 | down: | |
633 | if (netif_carrier_ok(bond->dev)) { | |
634 | netif_carrier_off(bond->dev); | |
635 | return 1; | |
636 | } | |
637 | return 0; | |
638 | } | |
639 | ||
1da177e4 LT |
640 | /* |
641 | * Get link speed and duplex from the slave's base driver | |
642 | * using ethtool. If for some reason the call fails or the | |
643 | * values are invalid, fake speed and duplex to 100/Full | |
644 | * and return error. | |
645 | */ | |
646 | static int bond_update_speed_duplex(struct slave *slave) | |
647 | { | |
648 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 649 | struct ethtool_cmd etool; |
61a44b9c | 650 | int res; |
1da177e4 LT |
651 | |
652 | /* Fake speed and duplex */ | |
653 | slave->speed = SPEED_100; | |
654 | slave->duplex = DUPLEX_FULL; | |
655 | ||
61a44b9c MW |
656 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
657 | return -1; | |
1da177e4 | 658 | |
61a44b9c MW |
659 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
660 | if (res < 0) | |
1da177e4 | 661 | return -1; |
1da177e4 | 662 | |
1da177e4 LT |
663 | switch (etool.speed) { |
664 | case SPEED_10: | |
665 | case SPEED_100: | |
666 | case SPEED_1000: | |
94dbffd5 | 667 | case SPEED_10000: |
1da177e4 LT |
668 | break; |
669 | default: | |
670 | return -1; | |
671 | } | |
672 | ||
673 | switch (etool.duplex) { | |
674 | case DUPLEX_FULL: | |
675 | case DUPLEX_HALF: | |
676 | break; | |
677 | default: | |
678 | return -1; | |
679 | } | |
680 | ||
681 | slave->speed = etool.speed; | |
682 | slave->duplex = etool.duplex; | |
683 | ||
684 | return 0; | |
685 | } | |
686 | ||
687 | /* | |
688 | * if <dev> supports MII link status reporting, check its link status. | |
689 | * | |
690 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 691 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
692 | * |
693 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
694 | * can't tell and just pretend it is), or 0, meaning that the link is | |
695 | * down. | |
696 | * | |
697 | * If reporting is non-zero, instead of faking link up, return -1 if | |
698 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
699 | * support them). If use_carrier is set, return whatever it says. | |
700 | * It'd be nice if there was a good way to tell if a driver supports | |
701 | * netif_carrier, but there really isn't. | |
702 | */ | |
3d632c3f SH |
703 | static int bond_check_dev_link(struct bonding *bond, |
704 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 705 | { |
eb7cc59a | 706 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 707 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
708 | struct ifreq ifr; |
709 | struct mii_ioctl_data *mii; | |
1da177e4 | 710 | |
6c988853 PG |
711 | if (!reporting && !netif_running(slave_dev)) |
712 | return 0; | |
713 | ||
eb7cc59a | 714 | if (bond->params.use_carrier) |
1da177e4 | 715 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 716 | |
29112f4e JP |
717 | /* Try to get link status using Ethtool first. */ |
718 | if (slave_dev->ethtool_ops) { | |
719 | if (slave_dev->ethtool_ops->get_link) { | |
720 | u32 link; | |
721 | ||
722 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
723 | ||
724 | return link ? BMSR_LSTATUS : 0; | |
725 | } | |
726 | } | |
727 | ||
3d632c3f | 728 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 729 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
730 | if (ioctl) { |
731 | /* TODO: set pointer to correct ioctl on a per team member */ | |
732 | /* bases to make this more efficient. that is, once */ | |
733 | /* we determine the correct ioctl, we will always */ | |
734 | /* call it and not the others for that team */ | |
735 | /* member. */ | |
736 | ||
737 | /* | |
738 | * We cannot assume that SIOCGMIIPHY will also read a | |
739 | * register; not all network drivers (e.g., e100) | |
740 | * support that. | |
741 | */ | |
742 | ||
743 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
744 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
745 | mii = if_mii(&ifr); | |
746 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
747 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
748 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
749 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
750 | } |
751 | } | |
752 | ||
1da177e4 LT |
753 | /* |
754 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 755 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
756 | * cannot report link status). If not reporting, pretend |
757 | * we're ok. | |
758 | */ | |
3d632c3f | 759 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
760 | } |
761 | ||
762 | /*----------------------------- Multicast list ------------------------------*/ | |
763 | ||
1da177e4 LT |
764 | /* |
765 | * Push the promiscuity flag down to appropriate slaves | |
766 | */ | |
7e1a1ac1 | 767 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 768 | { |
7e1a1ac1 | 769 | int err = 0; |
1da177e4 LT |
770 | if (USES_PRIMARY(bond->params.mode)) { |
771 | /* write lock already acquired */ | |
772 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
773 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
774 | inc); | |
1da177e4 LT |
775 | } |
776 | } else { | |
777 | struct slave *slave; | |
778 | int i; | |
779 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
780 | err = dev_set_promiscuity(slave->dev, inc); |
781 | if (err) | |
782 | return err; | |
1da177e4 LT |
783 | } |
784 | } | |
7e1a1ac1 | 785 | return err; |
1da177e4 LT |
786 | } |
787 | ||
788 | /* | |
789 | * Push the allmulti flag down to all slaves | |
790 | */ | |
7e1a1ac1 | 791 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 792 | { |
7e1a1ac1 | 793 | int err = 0; |
1da177e4 LT |
794 | if (USES_PRIMARY(bond->params.mode)) { |
795 | /* write lock already acquired */ | |
796 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
797 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
798 | inc); | |
1da177e4 LT |
799 | } |
800 | } else { | |
801 | struct slave *slave; | |
802 | int i; | |
803 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
804 | err = dev_set_allmulti(slave->dev, inc); |
805 | if (err) | |
806 | return err; | |
1da177e4 LT |
807 | } |
808 | } | |
7e1a1ac1 | 809 | return err; |
1da177e4 LT |
810 | } |
811 | ||
812 | /* | |
813 | * Add a Multicast address to slaves | |
814 | * according to mode | |
815 | */ | |
22bedad3 | 816 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
817 | { |
818 | if (USES_PRIMARY(bond->params.mode)) { | |
819 | /* write lock already acquired */ | |
3d632c3f | 820 | if (bond->curr_active_slave) |
22bedad3 | 821 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
822 | } else { |
823 | struct slave *slave; | |
824 | int i; | |
3d632c3f SH |
825 | |
826 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 827 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
828 | } |
829 | } | |
830 | ||
831 | /* | |
832 | * Remove a multicast address from slave | |
833 | * according to mode | |
834 | */ | |
22bedad3 | 835 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
836 | { |
837 | if (USES_PRIMARY(bond->params.mode)) { | |
838 | /* write lock already acquired */ | |
3d632c3f | 839 | if (bond->curr_active_slave) |
22bedad3 | 840 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
841 | } else { |
842 | struct slave *slave; | |
843 | int i; | |
844 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 845 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
846 | } |
847 | } | |
848 | } | |
849 | ||
a816c7c7 JV |
850 | |
851 | /* | |
852 | * Retrieve the list of registered multicast addresses for the bonding | |
853 | * device and retransmit an IGMP JOIN request to the current active | |
854 | * slave. | |
855 | */ | |
856 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
857 | { | |
858 | struct in_device *in_dev; | |
859 | struct ip_mc_list *im; | |
860 | ||
861 | rcu_read_lock(); | |
862 | in_dev = __in_dev_get_rcu(bond->dev); | |
863 | if (in_dev) { | |
3d632c3f | 864 | for (im = in_dev->mc_list; im; im = im->next) |
a816c7c7 | 865 | ip_mc_rejoin_group(im); |
a816c7c7 JV |
866 | } |
867 | ||
868 | rcu_read_unlock(); | |
869 | } | |
870 | ||
1da177e4 LT |
871 | /* |
872 | * flush all members of flush->mc_list from device dev->mc_list | |
873 | */ | |
3d632c3f SH |
874 | static void bond_mc_list_flush(struct net_device *bond_dev, |
875 | struct net_device *slave_dev) | |
1da177e4 | 876 | { |
454d7c9b | 877 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 878 | struct netdev_hw_addr *ha; |
1da177e4 | 879 | |
22bedad3 JP |
880 | netdev_for_each_mc_addr(ha, bond_dev) |
881 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
882 | |
883 | if (bond->params.mode == BOND_MODE_8023AD) { | |
884 | /* del lacpdu mc addr from mc list */ | |
885 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
886 | ||
22bedad3 | 887 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
888 | } |
889 | } | |
890 | ||
891 | /*--------------------------- Active slave change ---------------------------*/ | |
892 | ||
893 | /* | |
894 | * Update the mc list and multicast-related flags for the new and | |
895 | * old active slaves (if any) according to the multicast mode, and | |
896 | * promiscuous flags unconditionally. | |
897 | */ | |
3d632c3f SH |
898 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
899 | struct slave *old_active) | |
1da177e4 | 900 | { |
22bedad3 | 901 | struct netdev_hw_addr *ha; |
1da177e4 | 902 | |
3d632c3f | 903 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
904 | /* nothing to do - mc list is already up-to-date on |
905 | * all slaves | |
906 | */ | |
907 | return; | |
1da177e4 LT |
908 | |
909 | if (old_active) { | |
3d632c3f | 910 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 911 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 912 | |
3d632c3f | 913 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 914 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 915 | |
22bedad3 JP |
916 | netdev_for_each_mc_addr(ha, bond->dev) |
917 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
918 | } |
919 | ||
920 | if (new_active) { | |
7e1a1ac1 | 921 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 922 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 923 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 924 | |
3d632c3f | 925 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 926 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 927 | |
22bedad3 JP |
928 | netdev_for_each_mc_addr(ha, bond->dev) |
929 | dev_mc_add(new_active->dev, ha->addr); | |
a816c7c7 | 930 | bond_resend_igmp_join_requests(bond); |
1da177e4 LT |
931 | } |
932 | } | |
933 | ||
3915c1e8 JV |
934 | /* |
935 | * bond_do_fail_over_mac | |
936 | * | |
937 | * Perform special MAC address swapping for fail_over_mac settings | |
938 | * | |
939 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
940 | */ | |
941 | static void bond_do_fail_over_mac(struct bonding *bond, | |
942 | struct slave *new_active, | |
943 | struct slave *old_active) | |
1f78d9f9 HE |
944 | __releases(&bond->curr_slave_lock) |
945 | __releases(&bond->lock) | |
946 | __acquires(&bond->lock) | |
947 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
948 | { |
949 | u8 tmp_mac[ETH_ALEN]; | |
950 | struct sockaddr saddr; | |
951 | int rv; | |
952 | ||
953 | switch (bond->params.fail_over_mac) { | |
954 | case BOND_FOM_ACTIVE: | |
955 | if (new_active) | |
956 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
957 | new_active->dev->addr_len); | |
958 | break; | |
959 | case BOND_FOM_FOLLOW: | |
960 | /* | |
961 | * if new_active && old_active, swap them | |
962 | * if just old_active, do nothing (going to no active slave) | |
963 | * if just new_active, set new_active to bond's MAC | |
964 | */ | |
965 | if (!new_active) | |
966 | return; | |
967 | ||
968 | write_unlock_bh(&bond->curr_slave_lock); | |
969 | read_unlock(&bond->lock); | |
970 | ||
971 | if (old_active) { | |
972 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
973 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
974 | ETH_ALEN); | |
975 | saddr.sa_family = new_active->dev->type; | |
976 | } else { | |
977 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
978 | saddr.sa_family = bond->dev->type; | |
979 | } | |
980 | ||
981 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
982 | if (rv) { | |
a4aee5c8 | 983 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
984 | bond->dev->name, -rv, new_active->dev->name); |
985 | goto out; | |
986 | } | |
987 | ||
988 | if (!old_active) | |
989 | goto out; | |
990 | ||
991 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
992 | saddr.sa_family = old_active->dev->type; | |
993 | ||
994 | rv = dev_set_mac_address(old_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 | out: | |
999 | read_lock(&bond->lock); | |
1000 | write_lock_bh(&bond->curr_slave_lock); | |
1001 | break; | |
1002 | default: | |
a4aee5c8 | 1003 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
1004 | bond->dev->name, bond->params.fail_over_mac); |
1005 | break; | |
1006 | } | |
1007 | ||
1008 | } | |
1009 | ||
a549952a JP |
1010 | static bool bond_should_change_active(struct bonding *bond) |
1011 | { | |
1012 | struct slave *prim = bond->primary_slave; | |
1013 | struct slave *curr = bond->curr_active_slave; | |
1014 | ||
1015 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
1016 | return true; | |
1017 | if (bond->force_primary) { | |
1018 | bond->force_primary = false; | |
1019 | return true; | |
1020 | } | |
1021 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
1022 | (prim->speed < curr->speed || | |
1023 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
1024 | return false; | |
1025 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
1026 | return false; | |
1027 | return true; | |
1028 | } | |
3915c1e8 | 1029 | |
1da177e4 LT |
1030 | /** |
1031 | * find_best_interface - select the best available slave to be the active one | |
1032 | * @bond: our bonding struct | |
1033 | * | |
1034 | * Warning: Caller must hold curr_slave_lock for writing. | |
1035 | */ | |
1036 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1037 | { | |
1038 | struct slave *new_active, *old_active; | |
1039 | struct slave *bestslave = NULL; | |
1040 | int mintime = bond->params.updelay; | |
1041 | int i; | |
1042 | ||
49b4ad92 | 1043 | new_active = bond->curr_active_slave; |
1da177e4 LT |
1044 | |
1045 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1046 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1047 | new_active = bond->first_slave; |
3d632c3f | 1048 | else |
1da177e4 | 1049 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1050 | } |
1051 | ||
1da177e4 | 1052 | if ((bond->primary_slave) && |
a549952a JP |
1053 | bond->primary_slave->link == BOND_LINK_UP && |
1054 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1055 | new_active = bond->primary_slave; |
1056 | } | |
1057 | ||
1058 | /* remember where to stop iterating over the slaves */ | |
1059 | old_active = new_active; | |
1060 | ||
1061 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1062 | if (new_active->link == BOND_LINK_UP) { |
1063 | return new_active; | |
1064 | } else if (new_active->link == BOND_LINK_BACK && | |
1065 | IS_UP(new_active->dev)) { | |
1066 | /* link up, but waiting for stabilization */ | |
1067 | if (new_active->delay < mintime) { | |
1068 | mintime = new_active->delay; | |
1069 | bestslave = new_active; | |
1da177e4 LT |
1070 | } |
1071 | } | |
1072 | } | |
1073 | ||
1074 | return bestslave; | |
1075 | } | |
1076 | ||
1077 | /** | |
1078 | * change_active_interface - change the active slave into the specified one | |
1079 | * @bond: our bonding struct | |
1080 | * @new: the new slave to make the active one | |
1081 | * | |
1082 | * Set the new slave to the bond's settings and unset them on the old | |
1083 | * curr_active_slave. | |
1084 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1085 | * | |
1086 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1087 | * because it is apparently the best available slave we have, even though its | |
1088 | * updelay hasn't timed out yet. | |
1089 | * | |
3915c1e8 JV |
1090 | * If new_active is not NULL, caller must hold bond->lock for read and |
1091 | * curr_slave_lock for write_bh. | |
1da177e4 | 1092 | */ |
a77b5325 | 1093 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1094 | { |
1095 | struct slave *old_active = bond->curr_active_slave; | |
1096 | ||
3d632c3f | 1097 | if (old_active == new_active) |
1da177e4 | 1098 | return; |
1da177e4 LT |
1099 | |
1100 | if (new_active) { | |
b2220cad JV |
1101 | new_active->jiffies = jiffies; |
1102 | ||
1da177e4 LT |
1103 | if (new_active->link == BOND_LINK_BACK) { |
1104 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1105 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1106 | bond->dev->name, new_active->dev->name, | |
1107 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | new_active->delay = 0; | |
1111 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1112 | |
3d632c3f | 1113 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1114 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1115 | |
58402054 | 1116 | if (bond_is_lb(bond)) |
1da177e4 | 1117 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1118 | } else { |
1119 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1120 | pr_info("%s: making interface %s the new active one.\n", |
1121 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1122 | } |
1123 | } | |
1124 | } | |
1125 | ||
3d632c3f | 1126 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1127 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1128 | |
58402054 | 1129 | if (bond_is_lb(bond)) { |
1da177e4 | 1130 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1131 | if (old_active) |
1132 | bond_set_slave_inactive_flags(old_active); | |
1133 | if (new_active) | |
1134 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1135 | } else { |
1136 | bond->curr_active_slave = new_active; | |
1137 | } | |
c3ade5ca JV |
1138 | |
1139 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1140 | if (old_active) |
c3ade5ca | 1141 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1142 | |
1143 | if (new_active) { | |
1144 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1145 | |
709f8a45 OG |
1146 | if (bond->params.fail_over_mac) |
1147 | bond_do_fail_over_mac(bond, new_active, | |
1148 | old_active); | |
3915c1e8 | 1149 | |
709f8a45 | 1150 | bond->send_grat_arp = bond->params.num_grat_arp; |
b59f9f74 | 1151 | bond_send_gratuitous_arp(bond); |
01f3109d | 1152 | |
305d552a BH |
1153 | bond->send_unsol_na = bond->params.num_unsol_na; |
1154 | bond_send_unsolicited_na(bond); | |
1155 | ||
01f3109d OG |
1156 | write_unlock_bh(&bond->curr_slave_lock); |
1157 | read_unlock(&bond->lock); | |
1158 | ||
75c78500 | 1159 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
01f3109d OG |
1160 | |
1161 | read_lock(&bond->lock); | |
1162 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1163 | } |
c3ade5ca | 1164 | } |
a2fd940f AG |
1165 | |
1166 | /* resend IGMP joins since all were sent on curr_active_slave */ | |
1167 | if (bond->params.mode == BOND_MODE_ROUNDROBIN) { | |
1168 | bond_resend_igmp_join_requests(bond); | |
1169 | } | |
1da177e4 LT |
1170 | } |
1171 | ||
1172 | /** | |
1173 | * bond_select_active_slave - select a new active slave, if needed | |
1174 | * @bond: our bonding struct | |
1175 | * | |
3d632c3f | 1176 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1177 | * - The old curr_active_slave has been released or lost its link. |
1178 | * - The primary_slave has got its link back. | |
1179 | * - A slave has got its link back and there's no old curr_active_slave. | |
1180 | * | |
3915c1e8 | 1181 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1182 | */ |
a77b5325 | 1183 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1184 | { |
1185 | struct slave *best_slave; | |
ff59c456 | 1186 | int rv; |
1da177e4 LT |
1187 | |
1188 | best_slave = bond_find_best_slave(bond); | |
1189 | if (best_slave != bond->curr_active_slave) { | |
1190 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1191 | rv = bond_set_carrier(bond); |
1192 | if (!rv) | |
1193 | return; | |
1194 | ||
1195 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1196 | pr_info("%s: first active interface up!\n", |
1197 | bond->dev->name); | |
ff59c456 | 1198 | } else { |
a4aee5c8 JP |
1199 | pr_info("%s: now running without any active interface !\n", |
1200 | bond->dev->name); | |
ff59c456 | 1201 | } |
1da177e4 LT |
1202 | } |
1203 | } | |
1204 | ||
1205 | /*--------------------------- slave list handling ---------------------------*/ | |
1206 | ||
1207 | /* | |
1208 | * This function attaches the slave to the end of list. | |
1209 | * | |
1210 | * bond->lock held for writing by caller. | |
1211 | */ | |
1212 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1213 | { | |
1214 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1215 | new_slave->next = new_slave; | |
1216 | new_slave->prev = new_slave; | |
1217 | bond->first_slave = new_slave; | |
1218 | } else { | |
1219 | new_slave->next = bond->first_slave; | |
1220 | new_slave->prev = bond->first_slave->prev; | |
1221 | new_slave->next->prev = new_slave; | |
1222 | new_slave->prev->next = new_slave; | |
1223 | } | |
1224 | ||
1225 | bond->slave_cnt++; | |
1226 | } | |
1227 | ||
1228 | /* | |
1229 | * This function detaches the slave from the list. | |
1230 | * WARNING: no check is made to verify if the slave effectively | |
1231 | * belongs to <bond>. | |
1232 | * Nothing is freed on return, structures are just unchained. | |
1233 | * If any slave pointer in bond was pointing to <slave>, | |
1234 | * it should be changed by the calling function. | |
1235 | * | |
1236 | * bond->lock held for writing by caller. | |
1237 | */ | |
1238 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1239 | { | |
3d632c3f | 1240 | if (slave->next) |
1da177e4 | 1241 | slave->next->prev = slave->prev; |
1da177e4 | 1242 | |
3d632c3f | 1243 | if (slave->prev) |
1da177e4 | 1244 | slave->prev->next = slave->next; |
1da177e4 LT |
1245 | |
1246 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1247 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1248 | bond->first_slave = slave->next; | |
1249 | } else { | |
1250 | bond->first_slave = NULL; /* slave was the last one */ | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | slave->next = NULL; | |
1255 | slave->prev = NULL; | |
1256 | bond->slave_cnt--; | |
1257 | } | |
1258 | ||
1259 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1260 | ||
4ad072c9 AB |
1261 | static int bond_sethwaddr(struct net_device *bond_dev, |
1262 | struct net_device *slave_dev) | |
1da177e4 | 1263 | { |
5a03cdb7 HE |
1264 | pr_debug("bond_dev=%p\n", bond_dev); |
1265 | pr_debug("slave_dev=%p\n", slave_dev); | |
1266 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1267 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1268 | return 0; | |
1269 | } | |
1270 | ||
7f353bf2 HX |
1271 | #define BOND_VLAN_FEATURES \ |
1272 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1273 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff | 1274 | |
3d632c3f | 1275 | /* |
8e3babcd | 1276 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1277 | * feature bits are managed elsewhere, so preserve those feature bits |
1278 | * on the master device. | |
8531c5ff AK |
1279 | */ |
1280 | static int bond_compute_features(struct bonding *bond) | |
1281 | { | |
8531c5ff AK |
1282 | struct slave *slave; |
1283 | struct net_device *bond_dev = bond->dev; | |
7f353bf2 | 1284 | unsigned long features = bond_dev->features; |
278339a4 | 1285 | unsigned long vlan_features = 0; |
3158bf7d MS |
1286 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1287 | bond_dev->hard_header_len); | |
8e3babcd | 1288 | int i; |
8531c5ff | 1289 | |
7f353bf2 | 1290 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
b63365a2 HX |
1291 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; |
1292 | ||
1293 | if (!bond->first_slave) | |
1294 | goto done; | |
1295 | ||
1296 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1297 | |
278339a4 | 1298 | vlan_features = bond->first_slave->dev->vlan_features; |
54ef3137 | 1299 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1300 | features = netdev_increment_features(features, |
1301 | slave->dev->features, | |
1302 | NETIF_F_ONE_FOR_ALL); | |
278339a4 JV |
1303 | vlan_features = netdev_increment_features(vlan_features, |
1304 | slave->dev->vlan_features, | |
1305 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1306 | if (slave->dev->hard_header_len > max_hard_header_len) |
1307 | max_hard_header_len = slave->dev->hard_header_len; | |
1308 | } | |
8531c5ff | 1309 | |
b63365a2 | 1310 | done: |
7f353bf2 | 1311 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
b63365a2 | 1312 | bond_dev->features = netdev_fix_features(features, NULL); |
278339a4 | 1313 | bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL); |
54ef3137 | 1314 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1315 | |
1316 | return 0; | |
1317 | } | |
1318 | ||
872254dd MS |
1319 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1320 | struct net_device *slave_dev) | |
1321 | { | |
454d7c9b | 1322 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1323 | |
00829823 | 1324 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1325 | |
1326 | bond_dev->type = slave_dev->type; | |
1327 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1328 | bond_dev->addr_len = slave_dev->addr_len; | |
1329 | ||
1330 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1331 | slave_dev->addr_len); | |
d90a162a | 1332 | bond->setup_by_slave = 1; |
872254dd MS |
1333 | } |
1334 | ||
1da177e4 | 1335 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1336 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1337 | { |
454d7c9b | 1338 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1339 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1340 | struct slave *new_slave = NULL; |
22bedad3 | 1341 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1342 | struct sockaddr addr; |
1343 | int link_reporting; | |
1344 | int old_features = bond_dev->features; | |
1345 | int res = 0; | |
1346 | ||
552709d5 | 1347 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1348 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1349 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1350 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1351 | } |
1352 | ||
1353 | /* bond must be initialized by bond_open() before enslaving */ | |
1354 | if (!(bond_dev->flags & IFF_UP)) { | |
a4aee5c8 JP |
1355 | pr_warning("%s: master_dev is not up in bond_enslave\n", |
1356 | bond_dev->name); | |
1da177e4 LT |
1357 | } |
1358 | ||
1359 | /* already enslaved */ | |
1360 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1361 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1362 | return -EBUSY; |
1363 | } | |
1364 | ||
1365 | /* vlan challenged mutual exclusion */ | |
1366 | /* no need to lock since we're protected by rtnl_lock */ | |
1367 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1368 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 | 1369 | if (!list_empty(&bond->vlan_list)) { |
a4aee5c8 JP |
1370 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1371 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1372 | return -EPERM; |
1373 | } else { | |
a4aee5c8 JP |
1374 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1375 | bond_dev->name, slave_dev->name, | |
1376 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1377 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
1378 | } | |
1379 | } else { | |
5a03cdb7 | 1380 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1381 | if (bond->slave_cnt == 0) { |
1382 | /* First slave, and it is not VLAN challenged, | |
1383 | * so remove the block of adding VLANs over the bond. | |
1384 | */ | |
1385 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1386 | } | |
1387 | } | |
1388 | ||
217df670 JV |
1389 | /* |
1390 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1391 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1392 | * the current ifenslave will set the interface down prior to |
1393 | * enslaving it; the old ifenslave will not. | |
1394 | */ | |
1395 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1396 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1397 | slave_dev->name); |
1398 | res = -EPERM; | |
1399 | goto err_undo_flags; | |
1400 | } | |
1da177e4 | 1401 | |
872254dd MS |
1402 | /* set bonding device ether type by slave - bonding netdevices are |
1403 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1404 | * there is a need to override some of the type dependent attribs/funcs. | |
1405 | * | |
1406 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1407 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1408 | */ | |
1409 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1410 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1411 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1412 | bond_dev->name, |
1413 | bond_dev->type, slave_dev->type); | |
75c78500 | 1414 | |
3ca5b404 JP |
1415 | res = netdev_bonding_change(bond_dev, |
1416 | NETDEV_PRE_TYPE_CHANGE); | |
1417 | res = notifier_to_errno(res); | |
1418 | if (res) { | |
1419 | pr_err("%s: refused to change device type\n", | |
1420 | bond_dev->name); | |
1421 | res = -EBUSY; | |
1422 | goto err_undo_flags; | |
1423 | } | |
75c78500 | 1424 | |
32a806c1 | 1425 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1426 | dev_uc_flush(bond_dev); |
22bedad3 | 1427 | dev_mc_flush(bond_dev); |
32a806c1 | 1428 | |
e36b9d16 MS |
1429 | if (slave_dev->type != ARPHRD_ETHER) |
1430 | bond_setup_by_slave(bond_dev, slave_dev); | |
1431 | else | |
1432 | ether_setup(bond_dev); | |
75c78500 | 1433 | |
93d9b7d7 JP |
1434 | netdev_bonding_change(bond_dev, |
1435 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1436 | } |
872254dd | 1437 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1438 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1439 | slave_dev->name, | |
1440 | slave_dev->type, bond_dev->type); | |
1441 | res = -EINVAL; | |
1442 | goto err_undo_flags; | |
872254dd MS |
1443 | } |
1444 | ||
eb7cc59a | 1445 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1446 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1447 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1448 | bond_dev->name); | |
3915c1e8 JV |
1449 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1450 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1451 | 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", |
1452 | bond_dev->name); | |
2ab82852 MS |
1453 | res = -EOPNOTSUPP; |
1454 | goto err_undo_flags; | |
1455 | } | |
1da177e4 LT |
1456 | } |
1457 | ||
243cb4e5 | 1458 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1459 | if (!new_slave) { |
1460 | res = -ENOMEM; | |
1461 | goto err_undo_flags; | |
1462 | } | |
1463 | ||
1da177e4 LT |
1464 | /* save slave's original flags before calling |
1465 | * netdev_set_master and dev_open | |
1466 | */ | |
1467 | new_slave->original_flags = slave_dev->flags; | |
1468 | ||
217df670 JV |
1469 | /* |
1470 | * Save slave's original ("permanent") mac address for modes | |
1471 | * that need it, and for restoring it upon release, and then | |
1472 | * set it to the master's address | |
1473 | */ | |
1474 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1475 | |
dd957c57 | 1476 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1477 | /* |
1478 | * Set slave to master's mac address. The application already | |
1479 | * set the master's mac address to that of the first slave | |
1480 | */ | |
1481 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1482 | addr.sa_family = slave_dev->type; | |
1483 | res = dev_set_mac_address(slave_dev, &addr); | |
1484 | if (res) { | |
5a03cdb7 | 1485 | pr_debug("Error %d calling set_mac_address\n", res); |
2ab82852 MS |
1486 | goto err_free; |
1487 | } | |
217df670 | 1488 | } |
1da177e4 | 1489 | |
c2edacf8 JV |
1490 | res = netdev_set_master(slave_dev, bond_dev); |
1491 | if (res) { | |
5a03cdb7 | 1492 | pr_debug("Error %d calling netdev_set_master\n", res); |
569f0c4d | 1493 | goto err_restore_mac; |
c2edacf8 | 1494 | } |
217df670 JV |
1495 | /* open the slave since the application closed it */ |
1496 | res = dev_open(slave_dev); | |
1497 | if (res) { | |
3d632c3f | 1498 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
569f0c4d | 1499 | goto err_unset_master; |
1da177e4 LT |
1500 | } |
1501 | ||
1da177e4 | 1502 | new_slave->dev = slave_dev; |
0b680e75 | 1503 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1504 | |
58402054 | 1505 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1506 | /* bond_alb_init_slave() must be called before all other stages since |
1507 | * it might fail and we do not want to have to undo everything | |
1508 | */ | |
1509 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1510 | if (res) |
569f0c4d | 1511 | goto err_close; |
1da177e4 LT |
1512 | } |
1513 | ||
1514 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1515 | * master's promisc (and mc) settings only if it becomes the | |
1516 | * curr_active_slave, and that is taken care of later when calling | |
1517 | * bond_change_active() | |
1518 | */ | |
1519 | if (!USES_PRIMARY(bond->params.mode)) { | |
1520 | /* set promiscuity level to new slave */ | |
1521 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1522 | res = dev_set_promiscuity(slave_dev, 1); |
1523 | if (res) | |
1524 | goto err_close; | |
1da177e4 LT |
1525 | } |
1526 | ||
1527 | /* set allmulti level to new slave */ | |
1528 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1529 | res = dev_set_allmulti(slave_dev, 1); |
1530 | if (res) | |
1531 | goto err_close; | |
1da177e4 LT |
1532 | } |
1533 | ||
b9e40857 | 1534 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1535 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1536 | netdev_for_each_mc_addr(ha, bond_dev) |
1537 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1538 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1539 | } |
1540 | ||
1541 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1542 | /* add lacpdu mc addr to mc list */ | |
1543 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1544 | ||
22bedad3 | 1545 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | bond_add_vlans_on_slave(bond, slave_dev); | |
1549 | ||
1550 | write_lock_bh(&bond->lock); | |
1551 | ||
1552 | bond_attach_slave(bond, new_slave); | |
1553 | ||
1554 | new_slave->delay = 0; | |
1555 | new_slave->link_failure_count = 0; | |
1556 | ||
8531c5ff AK |
1557 | bond_compute_features(bond); |
1558 | ||
3915c1e8 JV |
1559 | write_unlock_bh(&bond->lock); |
1560 | ||
1561 | read_lock(&bond->lock); | |
1562 | ||
f5b2b966 JV |
1563 | new_slave->last_arp_rx = jiffies; |
1564 | ||
1da177e4 LT |
1565 | if (bond->params.miimon && !bond->params.use_carrier) { |
1566 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1567 | ||
1568 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1569 | /* | |
1570 | * miimon is set but a bonded network driver | |
1571 | * does not support ETHTOOL/MII and | |
1572 | * arp_interval is not set. Note: if | |
1573 | * use_carrier is enabled, we will never go | |
1574 | * here (because netif_carrier is always | |
1575 | * supported); thus, we don't need to change | |
1576 | * the messages for netif_carrier. | |
1577 | */ | |
a4aee5c8 | 1578 | 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 | 1579 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1580 | } else if (link_reporting == -1) { |
1581 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1582 | 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", |
1583 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1584 | } |
1585 | } | |
1586 | ||
1587 | /* check for initial state */ | |
1588 | if (!bond->params.miimon || | |
1589 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1590 | if (bond->params.updelay) { | |
a4aee5c8 | 1591 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1592 | new_slave->link = BOND_LINK_BACK; |
1593 | new_slave->delay = bond->params.updelay; | |
1594 | } else { | |
a4aee5c8 | 1595 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1596 | new_slave->link = BOND_LINK_UP; |
1597 | } | |
1598 | new_slave->jiffies = jiffies; | |
1599 | } else { | |
a4aee5c8 | 1600 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1601 | new_slave->link = BOND_LINK_DOWN; |
1602 | } | |
1603 | ||
1604 | if (bond_update_speed_duplex(new_slave) && | |
1605 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1606 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1607 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1608 | |
1609 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1610 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1611 | bond_dev->name); | |
1da177e4 LT |
1612 | } |
1613 | } | |
1614 | ||
1615 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1616 | /* if there is a primary slave, remember it */ | |
a549952a | 1617 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1618 | bond->primary_slave = new_slave; |
a549952a JP |
1619 | bond->force_primary = true; |
1620 | } | |
1da177e4 LT |
1621 | } |
1622 | ||
3915c1e8 JV |
1623 | write_lock_bh(&bond->curr_slave_lock); |
1624 | ||
1da177e4 LT |
1625 | switch (bond->params.mode) { |
1626 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1627 | bond_set_slave_inactive_flags(new_slave); |
1628 | bond_select_active_slave(bond); | |
1da177e4 LT |
1629 | break; |
1630 | case BOND_MODE_8023AD: | |
1631 | /* in 802.3ad mode, the internal mechanism | |
1632 | * will activate the slaves in the selected | |
1633 | * aggregator | |
1634 | */ | |
1635 | bond_set_slave_inactive_flags(new_slave); | |
1636 | /* if this is the first slave */ | |
1637 | if (bond->slave_cnt == 1) { | |
1638 | SLAVE_AD_INFO(new_slave).id = 1; | |
1639 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1640 | * can be called only after the mac address of the bond is set | |
1641 | */ | |
1642 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1643 | bond->params.lacp_fast); | |
1644 | } else { | |
1645 | SLAVE_AD_INFO(new_slave).id = | |
1646 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1647 | } | |
1648 | ||
1649 | bond_3ad_bind_slave(new_slave); | |
1650 | break; | |
1651 | case BOND_MODE_TLB: | |
1652 | case BOND_MODE_ALB: | |
1653 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1654 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1655 | bond_select_active_slave(bond); |
1da177e4 LT |
1656 | break; |
1657 | default: | |
5a03cdb7 | 1658 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1659 | |
1660 | /* always active in trunk mode */ | |
1661 | new_slave->state = BOND_STATE_ACTIVE; | |
1662 | ||
1663 | /* In trunking mode there is little meaning to curr_active_slave | |
1664 | * anyway (it holds no special properties of the bond device), | |
1665 | * so we can change it without calling change_active_interface() | |
1666 | */ | |
3d632c3f | 1667 | if (!bond->curr_active_slave) |
1da177e4 | 1668 | bond->curr_active_slave = new_slave; |
3d632c3f | 1669 | |
1da177e4 LT |
1670 | break; |
1671 | } /* switch(bond_mode) */ | |
1672 | ||
3915c1e8 JV |
1673 | write_unlock_bh(&bond->curr_slave_lock); |
1674 | ||
ff59c456 JV |
1675 | bond_set_carrier(bond); |
1676 | ||
3915c1e8 | 1677 | read_unlock(&bond->lock); |
1da177e4 | 1678 | |
b76cdba9 MW |
1679 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1680 | if (res) | |
569f0c4d | 1681 | goto err_close; |
b76cdba9 | 1682 | |
a4aee5c8 JP |
1683 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1684 | bond_dev->name, slave_dev->name, | |
1685 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1686 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1da177e4 LT |
1687 | |
1688 | /* enslave is successful */ | |
1689 | return 0; | |
1690 | ||
1691 | /* Undo stages on error */ | |
1da177e4 LT |
1692 | err_close: |
1693 | dev_close(slave_dev); | |
1694 | ||
569f0c4d JV |
1695 | err_unset_master: |
1696 | netdev_set_master(slave_dev, NULL); | |
1697 | ||
1da177e4 | 1698 | err_restore_mac: |
dd957c57 | 1699 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1700 | /* XXX TODO - fom follow mode needs to change master's |
1701 | * MAC if this slave's MAC is in use by the bond, or at | |
1702 | * least print a warning. | |
1703 | */ | |
2ab82852 MS |
1704 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1705 | addr.sa_family = slave_dev->type; | |
1706 | dev_set_mac_address(slave_dev, &addr); | |
1707 | } | |
1da177e4 LT |
1708 | |
1709 | err_free: | |
1710 | kfree(new_slave); | |
1711 | ||
1712 | err_undo_flags: | |
1713 | bond_dev->features = old_features; | |
3d632c3f | 1714 | |
1da177e4 LT |
1715 | return res; |
1716 | } | |
1717 | ||
1718 | /* | |
1719 | * Try to release the slave device <slave> from the bond device <master> | |
1720 | * It is legal to access curr_active_slave without a lock because all the function | |
1721 | * is write-locked. | |
1722 | * | |
1723 | * The rules for slave state should be: | |
1724 | * for Active/Backup: | |
1725 | * Active stays on all backups go down | |
1726 | * for Bonded connections: | |
1727 | * The first up interface should be left on and all others downed. | |
1728 | */ | |
a77b5325 | 1729 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1730 | { |
454d7c9b | 1731 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1732 | struct slave *slave, *oldcurrent; |
1733 | struct sockaddr addr; | |
1da177e4 LT |
1734 | |
1735 | /* slave is not a slave or master is not master of this slave */ | |
1736 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1737 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1738 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1739 | bond_dev->name, slave_dev->name); |
1740 | return -EINVAL; | |
1741 | } | |
1742 | ||
1743 | write_lock_bh(&bond->lock); | |
1744 | ||
1745 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1746 | if (!slave) { | |
1747 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1748 | pr_info("%s: %s not enslaved\n", |
1749 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1750 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1751 | return -EINVAL; |
1752 | } | |
1753 | ||
3915c1e8 | 1754 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1755 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1756 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1757 | 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", |
1758 | bond_dev->name, slave_dev->name, | |
1759 | slave->perm_hwaddr, | |
1760 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1761 | } |
1762 | ||
1763 | /* Inform AD package of unbinding of slave. */ | |
1764 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1765 | /* must be called before the slave is | |
1766 | * detached from the list | |
1767 | */ | |
1768 | bond_3ad_unbind_slave(slave); | |
1769 | } | |
1770 | ||
a4aee5c8 JP |
1771 | pr_info("%s: releasing %s interface %s\n", |
1772 | bond_dev->name, | |
1773 | (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup", | |
1774 | slave_dev->name); | |
1da177e4 LT |
1775 | |
1776 | oldcurrent = bond->curr_active_slave; | |
1777 | ||
1778 | bond->current_arp_slave = NULL; | |
1779 | ||
1780 | /* release the slave from its bond */ | |
1781 | bond_detach_slave(bond, slave); | |
1782 | ||
8531c5ff AK |
1783 | bond_compute_features(bond); |
1784 | ||
3d632c3f | 1785 | if (bond->primary_slave == slave) |
1da177e4 | 1786 | bond->primary_slave = NULL; |
1da177e4 | 1787 | |
3d632c3f | 1788 | if (oldcurrent == slave) |
1da177e4 | 1789 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1790 | |
58402054 | 1791 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1792 | /* Must be called only after the slave has been |
1793 | * detached from the list and the curr_active_slave | |
1794 | * has been cleared (if our_slave == old_current), | |
1795 | * but before a new active slave is selected. | |
1796 | */ | |
2543331d | 1797 | write_unlock_bh(&bond->lock); |
1da177e4 | 1798 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1799 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1800 | } |
1801 | ||
059fe7a5 JV |
1802 | if (oldcurrent == slave) { |
1803 | /* | |
1804 | * Note that we hold RTNL over this sequence, so there | |
1805 | * is no concern that another slave add/remove event | |
1806 | * will interfere. | |
1807 | */ | |
1808 | write_unlock_bh(&bond->lock); | |
1809 | read_lock(&bond->lock); | |
1810 | write_lock_bh(&bond->curr_slave_lock); | |
1811 | ||
1da177e4 LT |
1812 | bond_select_active_slave(bond); |
1813 | ||
059fe7a5 JV |
1814 | write_unlock_bh(&bond->curr_slave_lock); |
1815 | read_unlock(&bond->lock); | |
1816 | write_lock_bh(&bond->lock); | |
1817 | } | |
1818 | ||
1da177e4 | 1819 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1820 | bond_set_carrier(bond); |
1821 | ||
1da177e4 LT |
1822 | /* if the last slave was removed, zero the mac address |
1823 | * of the master so it will be set by the application | |
1824 | * to the mac address of the first slave | |
1825 | */ | |
1826 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1827 | ||
1828 | if (list_empty(&bond->vlan_list)) { | |
1829 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1830 | } else { | |
a4aee5c8 JP |
1831 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
1832 | bond_dev->name, bond_dev->name); | |
1833 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
1834 | bond_dev->name); | |
1da177e4 LT |
1835 | } |
1836 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1837 | !bond_has_challenged_slaves(bond)) { | |
a4aee5c8 JP |
1838 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", |
1839 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1840 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1841 | } | |
1842 | ||
1843 | write_unlock_bh(&bond->lock); | |
1844 | ||
b76cdba9 MW |
1845 | /* must do this from outside any spinlocks */ |
1846 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1847 | ||
1da177e4 LT |
1848 | bond_del_vlans_from_slave(bond, slave_dev); |
1849 | ||
1850 | /* If the mode USES_PRIMARY, then we should only remove its | |
1851 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1852 | * already taken care of above when we detached the slave | |
1853 | */ | |
1854 | if (!USES_PRIMARY(bond->params.mode)) { | |
1855 | /* unset promiscuity level from slave */ | |
3d632c3f | 1856 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 1857 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1858 | |
1859 | /* unset allmulti level from slave */ | |
3d632c3f | 1860 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 1861 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
1862 | |
1863 | /* flush master's mc_list from slave */ | |
b9e40857 | 1864 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1865 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 1866 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1867 | } |
1868 | ||
1869 | netdev_set_master(slave_dev, NULL); | |
1870 | ||
1871 | /* close slave before restoring its mac address */ | |
1872 | dev_close(slave_dev); | |
1873 | ||
3915c1e8 | 1874 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1875 | /* restore original ("permanent") mac address */ |
1876 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1877 | addr.sa_family = slave_dev->type; | |
1878 | dev_set_mac_address(slave_dev, &addr); | |
1879 | } | |
1da177e4 | 1880 | |
8f903c70 | 1881 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1882 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1883 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1884 | |
1885 | kfree(slave); | |
1886 | ||
1887 | return 0; /* deletion OK */ | |
1888 | } | |
1889 | ||
d90a162a | 1890 | /* |
3d632c3f | 1891 | * First release a slave and than destroy the bond if no more slaves are left. |
d90a162a MS |
1892 | * Must be under rtnl_lock when this function is called. |
1893 | */ | |
3d632c3f SH |
1894 | int bond_release_and_destroy(struct net_device *bond_dev, |
1895 | struct net_device *slave_dev) | |
d90a162a | 1896 | { |
454d7c9b | 1897 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
1898 | int ret; |
1899 | ||
1900 | ret = bond_release(bond_dev, slave_dev); | |
1901 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
a4aee5c8 JP |
1902 | pr_info("%s: destroying bond %s.\n", |
1903 | bond_dev->name, bond_dev->name); | |
9e71626c | 1904 | unregister_netdevice(bond_dev); |
d90a162a MS |
1905 | } |
1906 | return ret; | |
1907 | } | |
1908 | ||
1da177e4 LT |
1909 | /* |
1910 | * This function releases all slaves. | |
1911 | */ | |
1912 | static int bond_release_all(struct net_device *bond_dev) | |
1913 | { | |
454d7c9b | 1914 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1915 | struct slave *slave; |
1916 | struct net_device *slave_dev; | |
1917 | struct sockaddr addr; | |
1918 | ||
1919 | write_lock_bh(&bond->lock); | |
1920 | ||
ff59c456 JV |
1921 | netif_carrier_off(bond_dev); |
1922 | ||
3d632c3f | 1923 | if (bond->slave_cnt == 0) |
1da177e4 | 1924 | goto out; |
1da177e4 LT |
1925 | |
1926 | bond->current_arp_slave = NULL; | |
1927 | bond->primary_slave = NULL; | |
1928 | bond_change_active_slave(bond, NULL); | |
1929 | ||
1930 | while ((slave = bond->first_slave) != NULL) { | |
1931 | /* Inform AD package of unbinding of slave | |
1932 | * before slave is detached from the list. | |
1933 | */ | |
3d632c3f | 1934 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1935 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
1936 | |
1937 | slave_dev = slave->dev; | |
1938 | bond_detach_slave(bond, slave); | |
1939 | ||
2543331d JV |
1940 | /* now that the slave is detached, unlock and perform |
1941 | * all the undo steps that should not be called from | |
1942 | * within a lock. | |
1943 | */ | |
1944 | write_unlock_bh(&bond->lock); | |
1945 | ||
58402054 | 1946 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1947 | /* must be called only after the slave |
1948 | * has been detached from the list | |
1949 | */ | |
1950 | bond_alb_deinit_slave(bond, slave); | |
1951 | } | |
1952 | ||
8531c5ff AK |
1953 | bond_compute_features(bond); |
1954 | ||
b76cdba9 | 1955 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
1956 | bond_del_vlans_from_slave(bond, slave_dev); |
1957 | ||
1958 | /* If the mode USES_PRIMARY, then we should only remove its | |
1959 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1960 | * already taken care of above when we detached the slave | |
1961 | */ | |
1962 | if (!USES_PRIMARY(bond->params.mode)) { | |
1963 | /* unset promiscuity level from slave */ | |
3d632c3f | 1964 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 1965 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1966 | |
1967 | /* unset allmulti level from slave */ | |
3d632c3f | 1968 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 1969 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
1970 | |
1971 | /* flush master's mc_list from slave */ | |
b9e40857 | 1972 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1973 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 1974 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1975 | } |
1976 | ||
1977 | netdev_set_master(slave_dev, NULL); | |
1978 | ||
1979 | /* close slave before restoring its mac address */ | |
1980 | dev_close(slave_dev); | |
1981 | ||
dd957c57 | 1982 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1983 | /* restore original ("permanent") mac address*/ |
1984 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1985 | addr.sa_family = slave_dev->type; | |
1986 | dev_set_mac_address(slave_dev, &addr); | |
1987 | } | |
1da177e4 | 1988 | |
8f903c70 JV |
1989 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
1990 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
1991 | |
1992 | kfree(slave); | |
1993 | ||
1994 | /* re-acquire the lock before getting the next slave */ | |
1995 | write_lock_bh(&bond->lock); | |
1996 | } | |
1997 | ||
1998 | /* zero the mac address of the master so it will be | |
1999 | * set by the application to the mac address of the | |
2000 | * first slave | |
2001 | */ | |
2002 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2003 | ||
3d632c3f | 2004 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 2005 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
3d632c3f | 2006 | else { |
a4aee5c8 JP |
2007 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2008 | bond_dev->name, bond_dev->name); | |
2009 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2010 | bond_dev->name); | |
1da177e4 LT |
2011 | } |
2012 | ||
a4aee5c8 | 2013 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2014 | |
2015 | out: | |
2016 | write_unlock_bh(&bond->lock); | |
2017 | ||
2018 | return 0; | |
2019 | } | |
2020 | ||
2021 | /* | |
2022 | * This function changes the active slave to slave <slave_dev>. | |
2023 | * It returns -EINVAL in the following cases. | |
2024 | * - <slave_dev> is not found in the list. | |
2025 | * - There is not active slave now. | |
2026 | * - <slave_dev> is already active. | |
2027 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2028 | * - <slave_dev> is not running. | |
3d632c3f SH |
2029 | * In these cases, this function does nothing. |
2030 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2031 | */ |
2032 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2033 | { | |
454d7c9b | 2034 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2035 | struct slave *old_active = NULL; |
2036 | struct slave *new_active = NULL; | |
2037 | int res = 0; | |
2038 | ||
3d632c3f | 2039 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2040 | return -EINVAL; |
1da177e4 LT |
2041 | |
2042 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2043 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2044 | return -EINVAL; |
1da177e4 | 2045 | |
059fe7a5 | 2046 | read_lock(&bond->lock); |
1da177e4 | 2047 | |
059fe7a5 | 2048 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2049 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2050 | read_unlock(&bond->curr_slave_lock); |
2051 | ||
1da177e4 LT |
2052 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2053 | ||
2054 | /* | |
2055 | * Changing to the current active: do nothing; return success. | |
2056 | */ | |
2057 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2058 | read_unlock(&bond->lock); |
1da177e4 LT |
2059 | return 0; |
2060 | } | |
2061 | ||
2062 | if ((new_active) && | |
2063 | (old_active) && | |
2064 | (new_active->link == BOND_LINK_UP) && | |
2065 | IS_UP(new_active->dev)) { | |
059fe7a5 | 2066 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2067 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2068 | write_unlock_bh(&bond->curr_slave_lock); |
3d632c3f | 2069 | } else |
1da177e4 | 2070 | res = -EINVAL; |
1da177e4 | 2071 | |
059fe7a5 | 2072 | read_unlock(&bond->lock); |
1da177e4 LT |
2073 | |
2074 | return res; | |
2075 | } | |
2076 | ||
1da177e4 LT |
2077 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2078 | { | |
454d7c9b | 2079 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2080 | |
2081 | info->bond_mode = bond->params.mode; | |
2082 | info->miimon = bond->params.miimon; | |
2083 | ||
6603a6f2 | 2084 | read_lock(&bond->lock); |
1da177e4 | 2085 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2086 | read_unlock(&bond->lock); |
1da177e4 LT |
2087 | |
2088 | return 0; | |
2089 | } | |
2090 | ||
2091 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2092 | { | |
454d7c9b | 2093 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2094 | struct slave *slave; |
689c96cc | 2095 | int i, res = -ENODEV; |
1da177e4 | 2096 | |
6603a6f2 | 2097 | read_lock(&bond->lock); |
1da177e4 LT |
2098 | |
2099 | bond_for_each_slave(bond, slave, i) { | |
2100 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2101 | res = 0; |
2102 | strcpy(info->slave_name, slave->dev->name); | |
2103 | info->link = slave->link; | |
2104 | info->state = slave->state; | |
2105 | info->link_failure_count = slave->link_failure_count; | |
1da177e4 LT |
2106 | break; |
2107 | } | |
2108 | } | |
2109 | ||
6603a6f2 | 2110 | read_unlock(&bond->lock); |
1da177e4 | 2111 | |
689c96cc | 2112 | return res; |
1da177e4 LT |
2113 | } |
2114 | ||
2115 | /*-------------------------------- Monitoring -------------------------------*/ | |
2116 | ||
1da177e4 | 2117 | |
f0c76d61 JV |
2118 | static int bond_miimon_inspect(struct bonding *bond) |
2119 | { | |
2120 | struct slave *slave; | |
2121 | int i, link_state, commit = 0; | |
41f89100 JP |
2122 | bool ignore_updelay; |
2123 | ||
2124 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2125 | |
2126 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2127 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2128 | |
f0c76d61 | 2129 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2130 | |
2131 | switch (slave->link) { | |
f0c76d61 JV |
2132 | case BOND_LINK_UP: |
2133 | if (link_state) | |
2134 | continue; | |
1da177e4 | 2135 | |
f0c76d61 JV |
2136 | slave->link = BOND_LINK_FAIL; |
2137 | slave->delay = bond->params.downdelay; | |
2138 | if (slave->delay) { | |
a4aee5c8 JP |
2139 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2140 | bond->dev->name, | |
2141 | (bond->params.mode == | |
2142 | BOND_MODE_ACTIVEBACKUP) ? | |
2143 | ((slave->state == BOND_STATE_ACTIVE) ? | |
2144 | "active " : "backup ") : "", | |
2145 | slave->dev->name, | |
2146 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2147 | } |
f0c76d61 JV |
2148 | /*FALLTHRU*/ |
2149 | case BOND_LINK_FAIL: | |
2150 | if (link_state) { | |
2151 | /* | |
2152 | * recovered before downdelay expired | |
2153 | */ | |
2154 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2155 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2156 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2157 | bond->dev->name, | |
2158 | (bond->params.downdelay - slave->delay) * | |
2159 | bond->params.miimon, | |
2160 | slave->dev->name); | |
f0c76d61 | 2161 | continue; |
1da177e4 | 2162 | } |
f0c76d61 JV |
2163 | |
2164 | if (slave->delay <= 0) { | |
2165 | slave->new_link = BOND_LINK_DOWN; | |
2166 | commit++; | |
2167 | continue; | |
1da177e4 | 2168 | } |
1da177e4 | 2169 | |
f0c76d61 JV |
2170 | slave->delay--; |
2171 | break; | |
2172 | ||
2173 | case BOND_LINK_DOWN: | |
2174 | if (!link_state) | |
2175 | continue; | |
2176 | ||
2177 | slave->link = BOND_LINK_BACK; | |
2178 | slave->delay = bond->params.updelay; | |
2179 | ||
2180 | if (slave->delay) { | |
a4aee5c8 JP |
2181 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2182 | bond->dev->name, slave->dev->name, | |
2183 | ignore_updelay ? 0 : | |
2184 | bond->params.updelay * | |
2185 | bond->params.miimon); | |
f0c76d61 JV |
2186 | } |
2187 | /*FALLTHRU*/ | |
2188 | case BOND_LINK_BACK: | |
2189 | if (!link_state) { | |
2190 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2191 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2192 | bond->dev->name, | |
2193 | (bond->params.updelay - slave->delay) * | |
2194 | bond->params.miimon, | |
2195 | slave->dev->name); | |
f0c76d61 JV |
2196 | |
2197 | continue; | |
2198 | } | |
2199 | ||
41f89100 JP |
2200 | if (ignore_updelay) |
2201 | slave->delay = 0; | |
2202 | ||
f0c76d61 JV |
2203 | if (slave->delay <= 0) { |
2204 | slave->new_link = BOND_LINK_UP; | |
2205 | commit++; | |
41f89100 | 2206 | ignore_updelay = false; |
f0c76d61 | 2207 | continue; |
1da177e4 | 2208 | } |
f0c76d61 JV |
2209 | |
2210 | slave->delay--; | |
1da177e4 | 2211 | break; |
f0c76d61 JV |
2212 | } |
2213 | } | |
1da177e4 | 2214 | |
f0c76d61 JV |
2215 | return commit; |
2216 | } | |
1da177e4 | 2217 | |
f0c76d61 JV |
2218 | static void bond_miimon_commit(struct bonding *bond) |
2219 | { | |
2220 | struct slave *slave; | |
2221 | int i; | |
2222 | ||
2223 | bond_for_each_slave(bond, slave, i) { | |
2224 | switch (slave->new_link) { | |
2225 | case BOND_LINK_NOCHANGE: | |
2226 | continue; | |
1da177e4 | 2227 | |
f0c76d61 JV |
2228 | case BOND_LINK_UP: |
2229 | slave->link = BOND_LINK_UP; | |
2230 | slave->jiffies = jiffies; | |
2231 | ||
2232 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2233 | /* prevent it from being the active one */ | |
2234 | slave->state = BOND_STATE_BACKUP; | |
2235 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2236 | /* make it immediately active */ | |
2237 | slave->state = BOND_STATE_ACTIVE; | |
2238 | } else if (slave != bond->primary_slave) { | |
2239 | /* prevent it from being the active one */ | |
2240 | slave->state = BOND_STATE_BACKUP; | |
1da177e4 | 2241 | } |
1da177e4 | 2242 | |
a4aee5c8 JP |
2243 | pr_info("%s: link status definitely up for interface %s.\n", |
2244 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2245 | |
f0c76d61 JV |
2246 | /* notify ad that the link status has changed */ |
2247 | if (bond->params.mode == BOND_MODE_8023AD) | |
2248 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2249 | |
58402054 | 2250 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2251 | bond_alb_handle_link_change(bond, slave, |
2252 | BOND_LINK_UP); | |
1da177e4 | 2253 | |
f0c76d61 JV |
2254 | if (!bond->curr_active_slave || |
2255 | (slave == bond->primary_slave)) | |
2256 | goto do_failover; | |
1da177e4 | 2257 | |
f0c76d61 | 2258 | continue; |
059fe7a5 | 2259 | |
f0c76d61 | 2260 | case BOND_LINK_DOWN: |
fba4acda JV |
2261 | if (slave->link_failure_count < UINT_MAX) |
2262 | slave->link_failure_count++; | |
2263 | ||
f0c76d61 | 2264 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2265 | |
f0c76d61 JV |
2266 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2267 | bond->params.mode == BOND_MODE_8023AD) | |
2268 | bond_set_slave_inactive_flags(slave); | |
2269 | ||
a4aee5c8 JP |
2270 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2271 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2272 | |
2273 | if (bond->params.mode == BOND_MODE_8023AD) | |
2274 | bond_3ad_handle_link_change(slave, | |
2275 | BOND_LINK_DOWN); | |
2276 | ||
ae63e808 | 2277 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2278 | bond_alb_handle_link_change(bond, slave, |
2279 | BOND_LINK_DOWN); | |
2280 | ||
2281 | if (slave == bond->curr_active_slave) | |
2282 | goto do_failover; | |
2283 | ||
2284 | continue; | |
2285 | ||
2286 | default: | |
a4aee5c8 | 2287 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2288 | bond->dev->name, slave->new_link, |
2289 | slave->dev->name); | |
2290 | slave->new_link = BOND_LINK_NOCHANGE; | |
2291 | ||
2292 | continue; | |
2293 | } | |
2294 | ||
2295 | do_failover: | |
2296 | ASSERT_RTNL(); | |
2297 | write_lock_bh(&bond->curr_slave_lock); | |
2298 | bond_select_active_slave(bond); | |
2299 | write_unlock_bh(&bond->curr_slave_lock); | |
2300 | } | |
2301 | ||
2302 | bond_set_carrier(bond); | |
1da177e4 LT |
2303 | } |
2304 | ||
0b0eef66 JV |
2305 | /* |
2306 | * bond_mii_monitor | |
2307 | * | |
2308 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2309 | * inspection, then (if inspection indicates something needs to be done) |
2310 | * an acquisition of appropriate locks followed by a commit phase to | |
2311 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2312 | */ |
2313 | void bond_mii_monitor(struct work_struct *work) | |
2314 | { | |
2315 | struct bonding *bond = container_of(work, struct bonding, | |
2316 | mii_work.work); | |
0b0eef66 JV |
2317 | |
2318 | read_lock(&bond->lock); | |
f0c76d61 JV |
2319 | if (bond->kill_timers) |
2320 | goto out; | |
2321 | ||
2322 | if (bond->slave_cnt == 0) | |
2323 | goto re_arm; | |
b59f9f74 JV |
2324 | |
2325 | if (bond->send_grat_arp) { | |
2326 | read_lock(&bond->curr_slave_lock); | |
2327 | bond_send_gratuitous_arp(bond); | |
2328 | read_unlock(&bond->curr_slave_lock); | |
2329 | } | |
2330 | ||
305d552a BH |
2331 | if (bond->send_unsol_na) { |
2332 | read_lock(&bond->curr_slave_lock); | |
2333 | bond_send_unsolicited_na(bond); | |
2334 | read_unlock(&bond->curr_slave_lock); | |
2335 | } | |
2336 | ||
f0c76d61 | 2337 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2338 | read_unlock(&bond->lock); |
2339 | rtnl_lock(); | |
2340 | read_lock(&bond->lock); | |
f0c76d61 JV |
2341 | |
2342 | bond_miimon_commit(bond); | |
2343 | ||
5655662d JV |
2344 | read_unlock(&bond->lock); |
2345 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2346 | read_lock(&bond->lock); | |
0b0eef66 JV |
2347 | } |
2348 | ||
f0c76d61 JV |
2349 | re_arm: |
2350 | if (bond->params.miimon) | |
2351 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2352 | msecs_to_jiffies(bond->params.miimon)); | |
2353 | out: | |
0b0eef66 | 2354 | read_unlock(&bond->lock); |
0b0eef66 | 2355 | } |
c3ade5ca | 2356 | |
d3bb52b0 | 2357 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2358 | { |
2359 | struct in_device *idev; | |
2360 | struct in_ifaddr *ifa; | |
a144ea4b | 2361 | __be32 addr = 0; |
c3ade5ca JV |
2362 | |
2363 | if (!dev) | |
2364 | return 0; | |
2365 | ||
2366 | rcu_read_lock(); | |
e5ed6399 | 2367 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2368 | if (!idev) |
2369 | goto out; | |
2370 | ||
2371 | ifa = idev->ifa_list; | |
2372 | if (!ifa) | |
2373 | goto out; | |
2374 | ||
2375 | addr = ifa->ifa_local; | |
2376 | out: | |
2377 | rcu_read_unlock(); | |
2378 | return addr; | |
2379 | } | |
2380 | ||
d3bb52b0 | 2381 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2382 | { |
0883beca | 2383 | struct vlan_entry *vlan; |
f5b2b966 JV |
2384 | |
2385 | if (ip == bond->master_ip) | |
2386 | return 1; | |
2387 | ||
0883beca | 2388 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2389 | if (ip == vlan->vlan_ip) |
2390 | return 1; | |
2391 | } | |
2392 | ||
2393 | return 0; | |
2394 | } | |
2395 | ||
c3ade5ca JV |
2396 | /* |
2397 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2398 | * switches in VLAN mode (especially if ports are configured as | |
2399 | * "native" to a VLAN) might not pass non-tagged frames. | |
2400 | */ | |
d3bb52b0 | 2401 | 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 |
2402 | { |
2403 | struct sk_buff *skb; | |
2404 | ||
5a03cdb7 | 2405 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2406 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2407 | |
c3ade5ca JV |
2408 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2409 | NULL, slave_dev->dev_addr, NULL); | |
2410 | ||
2411 | if (!skb) { | |
a4aee5c8 | 2412 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2413 | return; |
2414 | } | |
2415 | if (vlan_id) { | |
2416 | skb = vlan_put_tag(skb, vlan_id); | |
2417 | if (!skb) { | |
a4aee5c8 | 2418 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2419 | return; |
2420 | } | |
2421 | } | |
2422 | arp_xmit(skb); | |
2423 | } | |
2424 | ||
2425 | ||
1da177e4 LT |
2426 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2427 | { | |
c3ade5ca | 2428 | int i, vlan_id, rv; |
d3bb52b0 | 2429 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2430 | struct vlan_entry *vlan; |
c3ade5ca JV |
2431 | struct net_device *vlan_dev; |
2432 | struct flowi fl; | |
2433 | struct rtable *rt; | |
1da177e4 | 2434 | |
6b780567 MW |
2435 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2436 | if (!targets[i]) | |
5a31bec0 | 2437 | break; |
5a03cdb7 | 2438 | pr_debug("basa: target %x\n", targets[i]); |
c3ade5ca | 2439 | if (list_empty(&bond->vlan_list)) { |
5a03cdb7 | 2440 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2441 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2442 | bond->master_ip, 0); | |
2443 | continue; | |
2444 | } | |
2445 | ||
2446 | /* | |
2447 | * If VLANs are configured, we do a route lookup to | |
2448 | * determine which VLAN interface would be used, so we | |
2449 | * can tag the ARP with the proper VLAN tag. | |
2450 | */ | |
2451 | memset(&fl, 0, sizeof(fl)); | |
2452 | fl.fl4_dst = targets[i]; | |
2453 | fl.fl4_tos = RTO_ONLINK; | |
2454 | ||
ec87fd3b | 2455 | rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl); |
c3ade5ca JV |
2456 | if (rv) { |
2457 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2458 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
2459 | bond->dev->name, &fl.fl4_dst); | |
c3ade5ca JV |
2460 | } |
2461 | continue; | |
2462 | } | |
2463 | ||
2464 | /* | |
2465 | * This target is not on a VLAN | |
2466 | */ | |
2467 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2468 | ip_rt_put(rt); |
5a03cdb7 | 2469 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2470 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2471 | bond->master_ip, 0); | |
2472 | continue; | |
2473 | } | |
2474 | ||
2475 | vlan_id = 0; | |
0883beca | 2476 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2477 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2478 | if (vlan_dev == rt->u.dst.dev) { |
2479 | vlan_id = vlan->vlan_id; | |
5a03cdb7 | 2480 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2481 | vlan_dev->name, vlan_id); |
2482 | break; | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | if (vlan_id) { | |
ed4b9f80 | 2487 | ip_rt_put(rt); |
c3ade5ca JV |
2488 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2489 | vlan->vlan_ip, vlan_id); | |
2490 | continue; | |
2491 | } | |
2492 | ||
2493 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2494 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2495 | bond->dev->name, &fl.fl4_dst, | |
2496 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
c3ade5ca | 2497 | } |
ed4b9f80 | 2498 | ip_rt_put(rt); |
c3ade5ca JV |
2499 | } |
2500 | } | |
2501 | ||
2502 | /* | |
2503 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2504 | * for each VLAN above us. | |
b59f9f74 JV |
2505 | * |
2506 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2507 | */ |
2508 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2509 | { | |
2510 | struct slave *slave = bond->curr_active_slave; | |
2511 | struct vlan_entry *vlan; | |
2512 | struct net_device *vlan_dev; | |
2513 | ||
a4aee5c8 JP |
2514 | pr_debug("bond_send_grat_arp: bond %s slave %s\n", |
2515 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
b59f9f74 JV |
2516 | |
2517 | if (!slave || !bond->send_grat_arp || | |
2518 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2519 | return; |
2520 | ||
b59f9f74 JV |
2521 | bond->send_grat_arp--; |
2522 | ||
c3ade5ca JV |
2523 | if (bond->master_ip) { |
2524 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2525 | bond->master_ip, 0); |
c3ade5ca JV |
2526 | } |
2527 | ||
2528 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
5c15bdec | 2529 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2530 | if (vlan->vlan_ip) { |
2531 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2532 | vlan->vlan_ip, vlan->vlan_id); | |
2533 | } | |
1da177e4 LT |
2534 | } |
2535 | } | |
2536 | ||
d3bb52b0 | 2537 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2538 | { |
2539 | int i; | |
d3bb52b0 | 2540 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2541 | |
f5b2b966 | 2542 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2543 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2544 | &sip, &tip, i, &targets[i], |
2545 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2546 | if (sip == targets[i]) { |
2547 | if (bond_has_this_ip(bond, tip)) | |
2548 | slave->last_arp_rx = jiffies; | |
2549 | return; | |
2550 | } | |
2551 | } | |
2552 | } | |
2553 | ||
2554 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2555 | { | |
2556 | struct arphdr *arp; | |
2557 | struct slave *slave; | |
2558 | struct bonding *bond; | |
2559 | unsigned char *arp_ptr; | |
d3bb52b0 | 2560 | __be32 sip, tip; |
f5b2b966 | 2561 | |
1f3c8804 AG |
2562 | if (dev->priv_flags & IFF_802_1Q_VLAN) { |
2563 | /* | |
2564 | * When using VLANS and bonding, dev and oriv_dev may be | |
2565 | * incorrect if the physical interface supports VLAN | |
2566 | * acceleration. With this change ARP validation now | |
2567 | * works for hosts only reachable on the VLAN interface. | |
2568 | */ | |
2569 | dev = vlan_dev_real_dev(dev); | |
2570 | orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif); | |
2571 | } | |
2572 | ||
f5b2b966 JV |
2573 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2574 | goto out; | |
2575 | ||
454d7c9b | 2576 | bond = netdev_priv(dev); |
f5b2b966 JV |
2577 | read_lock(&bond->lock); |
2578 | ||
5a03cdb7 | 2579 | pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", |
a4aee5c8 JP |
2580 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", |
2581 | orig_dev ? orig_dev->name : "NULL"); | |
f5b2b966 JV |
2582 | |
2583 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2584 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2585 | goto out_unlock; | |
2586 | ||
988b7050 | 2587 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2588 | goto out_unlock; |
2589 | ||
d0a92be0 | 2590 | arp = arp_hdr(skb); |
f5b2b966 JV |
2591 | if (arp->ar_hln != dev->addr_len || |
2592 | skb->pkt_type == PACKET_OTHERHOST || | |
2593 | skb->pkt_type == PACKET_LOOPBACK || | |
2594 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2595 | arp->ar_pro != htons(ETH_P_IP) || | |
2596 | arp->ar_pln != 4) | |
2597 | goto out_unlock; | |
2598 | ||
2599 | arp_ptr = (unsigned char *)(arp + 1); | |
2600 | arp_ptr += dev->addr_len; | |
2601 | memcpy(&sip, arp_ptr, 4); | |
2602 | arp_ptr += 4 + dev->addr_len; | |
2603 | memcpy(&tip, arp_ptr, 4); | |
2604 | ||
5a03cdb7 | 2605 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
a4aee5c8 JP |
2606 | bond->dev->name, slave->dev->name, slave->state, |
2607 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2608 | &sip, &tip); | |
f5b2b966 JV |
2609 | |
2610 | /* | |
2611 | * Backup slaves won't see the ARP reply, but do come through | |
2612 | * here for each ARP probe (so we swap the sip/tip to validate | |
2613 | * the probe). In a "redundant switch, common router" type of | |
2614 | * configuration, the ARP probe will (hopefully) travel from | |
2615 | * the active, through one switch, the router, then the other | |
2616 | * switch before reaching the backup. | |
2617 | */ | |
2618 | if (slave->state == BOND_STATE_ACTIVE) | |
2619 | bond_validate_arp(bond, slave, sip, tip); | |
2620 | else | |
2621 | bond_validate_arp(bond, slave, tip, sip); | |
2622 | ||
2623 | out_unlock: | |
2624 | read_unlock(&bond->lock); | |
2625 | out: | |
2626 | dev_kfree_skb(skb); | |
2627 | return NET_RX_SUCCESS; | |
2628 | } | |
2629 | ||
1da177e4 LT |
2630 | /* |
2631 | * this function is called regularly to monitor each slave's link | |
2632 | * ensuring that traffic is being sent and received when arp monitoring | |
2633 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2634 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2635 | * arp monitoring in active backup mode. | |
2636 | */ | |
1b76b316 | 2637 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2638 | { |
1b76b316 JV |
2639 | struct bonding *bond = container_of(work, struct bonding, |
2640 | arp_work.work); | |
1da177e4 LT |
2641 | struct slave *slave, *oldcurrent; |
2642 | int do_failover = 0; | |
2643 | int delta_in_ticks; | |
2644 | int i; | |
2645 | ||
2646 | read_lock(&bond->lock); | |
2647 | ||
5ce0da8f | 2648 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2649 | |
3d632c3f | 2650 | if (bond->kill_timers) |
1da177e4 | 2651 | goto out; |
1da177e4 | 2652 | |
3d632c3f | 2653 | if (bond->slave_cnt == 0) |
1da177e4 | 2654 | goto re_arm; |
1da177e4 LT |
2655 | |
2656 | read_lock(&bond->curr_slave_lock); | |
2657 | oldcurrent = bond->curr_active_slave; | |
2658 | read_unlock(&bond->curr_slave_lock); | |
2659 | ||
2660 | /* see if any of the previous devices are up now (i.e. they have | |
2661 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2662 | * the picture unless it is null. also, slave->jiffies is not needed | |
2663 | * here because we send an arp on each slave and give a slave as | |
2664 | * long as it needs to get the tx/rx within the delta. | |
2665 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2666 | * so it can wait | |
2667 | */ | |
2668 | bond_for_each_slave(bond, slave, i) { | |
2669 | if (slave->link != BOND_LINK_UP) { | |
9d21493b | 2670 | if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) && |
b63bb739 | 2671 | time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) { |
1da177e4 LT |
2672 | |
2673 | slave->link = BOND_LINK_UP; | |
2674 | slave->state = BOND_STATE_ACTIVE; | |
2675 | ||
2676 | /* primary_slave has no meaning in round-robin | |
2677 | * mode. the window of a slave being up and | |
2678 | * curr_active_slave being null after enslaving | |
2679 | * is closed. | |
2680 | */ | |
2681 | if (!oldcurrent) { | |
a4aee5c8 JP |
2682 | pr_info("%s: link status definitely up for interface %s, ", |
2683 | bond->dev->name, | |
2684 | slave->dev->name); | |
1da177e4 LT |
2685 | do_failover = 1; |
2686 | } else { | |
a4aee5c8 JP |
2687 | pr_info("%s: interface %s is now up\n", |
2688 | bond->dev->name, | |
2689 | slave->dev->name); | |
1da177e4 LT |
2690 | } |
2691 | } | |
2692 | } else { | |
2693 | /* slave->link == BOND_LINK_UP */ | |
2694 | ||
2695 | /* not all switches will respond to an arp request | |
2696 | * when the source ip is 0, so don't take the link down | |
2697 | * if we don't know our ip yet | |
2698 | */ | |
9d21493b | 2699 | if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) || |
4b8a9239 | 2700 | (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) { |
1da177e4 LT |
2701 | |
2702 | slave->link = BOND_LINK_DOWN; | |
2703 | slave->state = BOND_STATE_BACKUP; | |
2704 | ||
3d632c3f | 2705 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2706 | slave->link_failure_count++; |
1da177e4 | 2707 | |
a4aee5c8 JP |
2708 | pr_info("%s: interface %s is now down.\n", |
2709 | bond->dev->name, | |
2710 | slave->dev->name); | |
1da177e4 | 2711 | |
3d632c3f | 2712 | if (slave == oldcurrent) |
1da177e4 | 2713 | do_failover = 1; |
1da177e4 LT |
2714 | } |
2715 | } | |
2716 | ||
2717 | /* note: if switch is in round-robin mode, all links | |
2718 | * must tx arp to ensure all links rx an arp - otherwise | |
2719 | * links may oscillate or not come up at all; if switch is | |
2720 | * in something like xor mode, there is nothing we can | |
2721 | * do - all replies will be rx'ed on same link causing slaves | |
2722 | * to be unstable during low/no traffic periods | |
2723 | */ | |
3d632c3f | 2724 | if (IS_UP(slave->dev)) |
1da177e4 | 2725 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2726 | } |
2727 | ||
2728 | if (do_failover) { | |
059fe7a5 | 2729 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2730 | |
2731 | bond_select_active_slave(bond); | |
2732 | ||
059fe7a5 | 2733 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2734 | } |
2735 | ||
2736 | re_arm: | |
1b76b316 JV |
2737 | if (bond->params.arp_interval) |
2738 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2739 | out: |
2740 | read_unlock(&bond->lock); | |
2741 | } | |
2742 | ||
2743 | /* | |
b2220cad JV |
2744 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2745 | * changes. Sets new_link in slaves to specify what action should take | |
2746 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2747 | * to link states must be committed. | |
2748 | * | |
2749 | * Called with bond->lock held for read. | |
1da177e4 | 2750 | */ |
b2220cad | 2751 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2752 | { |
1da177e4 | 2753 | struct slave *slave; |
b2220cad | 2754 | int i, commit = 0; |
1da177e4 | 2755 | |
b2220cad JV |
2756 | bond_for_each_slave(bond, slave, i) { |
2757 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2758 | |
b2220cad JV |
2759 | if (slave->link != BOND_LINK_UP) { |
2760 | if (time_before_eq(jiffies, slave_last_rx(bond, slave) + | |
2761 | delta_in_ticks)) { | |
2762 | slave->new_link = BOND_LINK_UP; | |
2763 | commit++; | |
2764 | } | |
1da177e4 | 2765 | |
b2220cad JV |
2766 | continue; |
2767 | } | |
1da177e4 | 2768 | |
b2220cad JV |
2769 | /* |
2770 | * Give slaves 2*delta after being enslaved or made | |
2771 | * active. This avoids bouncing, as the last receive | |
2772 | * times need a full ARP monitor cycle to be updated. | |
2773 | */ | |
2774 | if (!time_after_eq(jiffies, slave->jiffies + | |
2775 | 2 * delta_in_ticks)) | |
2776 | continue; | |
2777 | ||
2778 | /* | |
2779 | * Backup slave is down if: | |
2780 | * - No current_arp_slave AND | |
2781 | * - more than 3*delta since last receive AND | |
2782 | * - the bond has an IP address | |
2783 | * | |
2784 | * Note: a non-null current_arp_slave indicates | |
2785 | * the curr_active_slave went down and we are | |
2786 | * searching for a new one; under this condition | |
2787 | * we only take the curr_active_slave down - this | |
2788 | * gives each slave a chance to tx/rx traffic | |
2789 | * before being taken out | |
2790 | */ | |
2791 | if (slave->state == BOND_STATE_BACKUP && | |
2792 | !bond->current_arp_slave && | |
2793 | time_after(jiffies, slave_last_rx(bond, slave) + | |
2794 | 3 * delta_in_ticks)) { | |
2795 | slave->new_link = BOND_LINK_DOWN; | |
2796 | commit++; | |
2797 | } | |
2798 | ||
2799 | /* | |
2800 | * Active slave is down if: | |
2801 | * - more than 2*delta since transmitting OR | |
2802 | * - (more than 2*delta since receive AND | |
2803 | * the bond has an IP address) | |
2804 | */ | |
2805 | if ((slave->state == BOND_STATE_ACTIVE) && | |
9d21493b | 2806 | (time_after_eq(jiffies, dev_trans_start(slave->dev) + |
b2220cad JV |
2807 | 2 * delta_in_ticks) || |
2808 | (time_after_eq(jiffies, slave_last_rx(bond, slave) | |
2809 | + 2 * delta_in_ticks)))) { | |
2810 | slave->new_link = BOND_LINK_DOWN; | |
2811 | commit++; | |
2812 | } | |
1da177e4 LT |
2813 | } |
2814 | ||
b2220cad JV |
2815 | return commit; |
2816 | } | |
1da177e4 | 2817 | |
b2220cad JV |
2818 | /* |
2819 | * Called to commit link state changes noted by inspection step of | |
2820 | * active-backup mode ARP monitor. | |
2821 | * | |
2822 | * Called with RTNL and bond->lock for read. | |
2823 | */ | |
2824 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2825 | { | |
2826 | struct slave *slave; | |
2827 | int i; | |
1da177e4 | 2828 | |
b2220cad JV |
2829 | bond_for_each_slave(bond, slave, i) { |
2830 | switch (slave->new_link) { | |
2831 | case BOND_LINK_NOCHANGE: | |
2832 | continue; | |
ff59c456 | 2833 | |
b2220cad | 2834 | case BOND_LINK_UP: |
b9f60253 JP |
2835 | if ((!bond->curr_active_slave && |
2836 | time_before_eq(jiffies, | |
2837 | dev_trans_start(slave->dev) + | |
2838 | delta_in_ticks)) || | |
2839 | bond->curr_active_slave != slave) { | |
b2220cad | 2840 | slave->link = BOND_LINK_UP; |
b2220cad JV |
2841 | bond->current_arp_slave = NULL; |
2842 | ||
a4aee5c8 | 2843 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 2844 | bond->dev->name, slave->dev->name); |
b2220cad | 2845 | |
b9f60253 JP |
2846 | if (!bond->curr_active_slave || |
2847 | (slave == bond->primary_slave)) | |
2848 | goto do_failover; | |
1da177e4 | 2849 | |
b9f60253 | 2850 | } |
1da177e4 | 2851 | |
b9f60253 | 2852 | continue; |
1da177e4 | 2853 | |
b2220cad JV |
2854 | case BOND_LINK_DOWN: |
2855 | if (slave->link_failure_count < UINT_MAX) | |
2856 | slave->link_failure_count++; | |
2857 | ||
2858 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 2859 | bond_set_slave_inactive_flags(slave); |
b2220cad | 2860 | |
a4aee5c8 | 2861 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 2862 | bond->dev->name, slave->dev->name); |
b2220cad | 2863 | |
b9f60253 | 2864 | if (slave == bond->curr_active_slave) { |
b2220cad | 2865 | bond->current_arp_slave = NULL; |
b9f60253 | 2866 | goto do_failover; |
1da177e4 | 2867 | } |
b9f60253 JP |
2868 | |
2869 | continue; | |
b2220cad JV |
2870 | |
2871 | default: | |
a4aee5c8 | 2872 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
2873 | bond->dev->name, slave->new_link, |
2874 | slave->dev->name); | |
b9f60253 | 2875 | continue; |
1da177e4 | 2876 | } |
1da177e4 | 2877 | |
b9f60253 JP |
2878 | do_failover: |
2879 | ASSERT_RTNL(); | |
b2220cad | 2880 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 2881 | bond_select_active_slave(bond); |
b2220cad JV |
2882 | write_unlock_bh(&bond->curr_slave_lock); |
2883 | } | |
1da177e4 | 2884 | |
b2220cad JV |
2885 | bond_set_carrier(bond); |
2886 | } | |
1da177e4 | 2887 | |
b2220cad JV |
2888 | /* |
2889 | * Send ARP probes for active-backup mode ARP monitor. | |
2890 | * | |
2891 | * Called with bond->lock held for read. | |
2892 | */ | |
2893 | static void bond_ab_arp_probe(struct bonding *bond) | |
2894 | { | |
2895 | struct slave *slave; | |
2896 | int i; | |
1da177e4 | 2897 | |
b2220cad | 2898 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2899 | |
b2220cad | 2900 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
2901 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
2902 | bond->current_arp_slave->dev->name, | |
2903 | bond->curr_active_slave->dev->name); | |
1da177e4 | 2904 | |
b2220cad JV |
2905 | if (bond->curr_active_slave) { |
2906 | bond_arp_send_all(bond, bond->curr_active_slave); | |
2907 | read_unlock(&bond->curr_slave_lock); | |
2908 | return; | |
2909 | } | |
1da177e4 | 2910 | |
b2220cad | 2911 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 2912 | |
b2220cad JV |
2913 | /* if we don't have a curr_active_slave, search for the next available |
2914 | * backup slave from the current_arp_slave and make it the candidate | |
2915 | * for becoming the curr_active_slave | |
2916 | */ | |
1da177e4 | 2917 | |
b2220cad JV |
2918 | if (!bond->current_arp_slave) { |
2919 | bond->current_arp_slave = bond->first_slave; | |
2920 | if (!bond->current_arp_slave) | |
2921 | return; | |
2922 | } | |
1da177e4 | 2923 | |
b2220cad | 2924 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 2925 | |
b2220cad JV |
2926 | /* search for next candidate */ |
2927 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
2928 | if (IS_UP(slave->dev)) { | |
2929 | slave->link = BOND_LINK_BACK; | |
2930 | bond_set_slave_active_flags(slave); | |
2931 | bond_arp_send_all(bond, slave); | |
1da177e4 | 2932 | slave->jiffies = jiffies; |
b2220cad JV |
2933 | bond->current_arp_slave = slave; |
2934 | break; | |
1da177e4 LT |
2935 | } |
2936 | ||
b2220cad JV |
2937 | /* if the link state is up at this point, we |
2938 | * mark it down - this can happen if we have | |
2939 | * simultaneous link failures and | |
2940 | * reselect_active_interface doesn't make this | |
2941 | * one the current slave so it is still marked | |
2942 | * up when it is actually down | |
1da177e4 | 2943 | */ |
b2220cad JV |
2944 | if (slave->link == BOND_LINK_UP) { |
2945 | slave->link = BOND_LINK_DOWN; | |
2946 | if (slave->link_failure_count < UINT_MAX) | |
2947 | slave->link_failure_count++; | |
1da177e4 | 2948 | |
b2220cad JV |
2949 | bond_set_slave_inactive_flags(slave); |
2950 | ||
a4aee5c8 JP |
2951 | pr_info("%s: backup interface %s is now down.\n", |
2952 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2953 | } |
b2220cad JV |
2954 | } |
2955 | } | |
1da177e4 | 2956 | |
b2220cad JV |
2957 | void bond_activebackup_arp_mon(struct work_struct *work) |
2958 | { | |
2959 | struct bonding *bond = container_of(work, struct bonding, | |
2960 | arp_work.work); | |
2961 | int delta_in_ticks; | |
1da177e4 | 2962 | |
b2220cad | 2963 | read_lock(&bond->lock); |
1da177e4 | 2964 | |
b2220cad JV |
2965 | if (bond->kill_timers) |
2966 | goto out; | |
1da177e4 | 2967 | |
b2220cad | 2968 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2969 | |
b2220cad JV |
2970 | if (bond->slave_cnt == 0) |
2971 | goto re_arm; | |
2972 | ||
b59f9f74 JV |
2973 | if (bond->send_grat_arp) { |
2974 | read_lock(&bond->curr_slave_lock); | |
2975 | bond_send_gratuitous_arp(bond); | |
2976 | read_unlock(&bond->curr_slave_lock); | |
2977 | } | |
2978 | ||
305d552a BH |
2979 | if (bond->send_unsol_na) { |
2980 | read_lock(&bond->curr_slave_lock); | |
2981 | bond_send_unsolicited_na(bond); | |
2982 | read_unlock(&bond->curr_slave_lock); | |
2983 | } | |
2984 | ||
b2220cad JV |
2985 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
2986 | read_unlock(&bond->lock); | |
2987 | rtnl_lock(); | |
2988 | read_lock(&bond->lock); | |
2989 | ||
2990 | bond_ab_arp_commit(bond, delta_in_ticks); | |
2991 | ||
2992 | read_unlock(&bond->lock); | |
2993 | rtnl_unlock(); | |
2994 | read_lock(&bond->lock); | |
1da177e4 LT |
2995 | } |
2996 | ||
b2220cad JV |
2997 | bond_ab_arp_probe(bond); |
2998 | ||
1da177e4 | 2999 | re_arm: |
3d632c3f | 3000 | if (bond->params.arp_interval) |
1b76b316 | 3001 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3002 | out: |
3003 | read_unlock(&bond->lock); | |
3004 | } | |
3005 | ||
3006 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3007 | ||
3008 | #ifdef CONFIG_PROC_FS | |
3009 | ||
1da177e4 | 3010 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
1f78d9f9 HE |
3011 | __acquires(&dev_base_lock) |
3012 | __acquires(&bond->lock) | |
1da177e4 LT |
3013 | { |
3014 | struct bonding *bond = seq->private; | |
3015 | loff_t off = 0; | |
3016 | struct slave *slave; | |
3017 | int i; | |
3018 | ||
3019 | /* make sure the bond won't be taken away */ | |
3020 | read_lock(&dev_base_lock); | |
6603a6f2 | 3021 | read_lock(&bond->lock); |
1da177e4 | 3022 | |
3d632c3f | 3023 | if (*pos == 0) |
1da177e4 | 3024 | return SEQ_START_TOKEN; |
1da177e4 LT |
3025 | |
3026 | bond_for_each_slave(bond, slave, i) { | |
3d632c3f | 3027 | if (++off == *pos) |
1da177e4 | 3028 | return slave; |
1da177e4 LT |
3029 | } |
3030 | ||
3031 | return NULL; | |
3032 | } | |
3033 | ||
3034 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3035 | { | |
3036 | struct bonding *bond = seq->private; | |
3037 | struct slave *slave = v; | |
3038 | ||
3039 | ++*pos; | |
3d632c3f | 3040 | if (v == SEQ_START_TOKEN) |
1da177e4 | 3041 | return bond->first_slave; |
1da177e4 LT |
3042 | |
3043 | slave = slave->next; | |
3044 | ||
3045 | return (slave == bond->first_slave) ? NULL : slave; | |
3046 | } | |
3047 | ||
3048 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
1f78d9f9 HE |
3049 | __releases(&bond->lock) |
3050 | __releases(&dev_base_lock) | |
1da177e4 LT |
3051 | { |
3052 | struct bonding *bond = seq->private; | |
3053 | ||
6603a6f2 | 3054 | read_unlock(&bond->lock); |
1da177e4 LT |
3055 | read_unlock(&dev_base_lock); |
3056 | } | |
3057 | ||
3058 | static void bond_info_show_master(struct seq_file *seq) | |
3059 | { | |
3060 | struct bonding *bond = seq->private; | |
3061 | struct slave *curr; | |
4756b02f | 3062 | int i; |
1da177e4 LT |
3063 | |
3064 | read_lock(&bond->curr_slave_lock); | |
3065 | curr = bond->curr_active_slave; | |
3066 | read_unlock(&bond->curr_slave_lock); | |
3067 | ||
dd957c57 | 3068 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3069 | bond_mode_name(bond->params.mode)); |
3070 | ||
dd957c57 JV |
3071 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3072 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3073 | seq_printf(seq, " (fail_over_mac %s)", |
3074 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3075 | |
3076 | seq_printf(seq, "\n"); | |
3077 | ||
c61b75ad MW |
3078 | if (bond->params.mode == BOND_MODE_XOR || |
3079 | bond->params.mode == BOND_MODE_8023AD) { | |
3080 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3081 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3082 | bond->params.xmit_policy); | |
3083 | } | |
3084 | ||
1da177e4 | 3085 | if (USES_PRIMARY(bond->params.mode)) { |
a549952a | 3086 | seq_printf(seq, "Primary Slave: %s", |
0f418b2a MW |
3087 | (bond->primary_slave) ? |
3088 | bond->primary_slave->dev->name : "None"); | |
a549952a JP |
3089 | if (bond->primary_slave) |
3090 | seq_printf(seq, " (primary_reselect %s)", | |
3091 | pri_reselect_tbl[bond->params.primary_reselect].modename); | |
1da177e4 | 3092 | |
a549952a | 3093 | seq_printf(seq, "\nCurrently Active Slave: %s\n", |
1da177e4 LT |
3094 | (curr) ? curr->dev->name : "None"); |
3095 | } | |
3096 | ||
ff59c456 JV |
3097 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3098 | "up" : "down"); | |
1da177e4 LT |
3099 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3100 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3101 | bond->params.updelay * bond->params.miimon); | |
3102 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3103 | bond->params.downdelay * bond->params.miimon); | |
3104 | ||
4756b02f MW |
3105 | |
3106 | /* ARP information */ | |
3d632c3f SH |
3107 | if (bond->params.arp_interval > 0) { |
3108 | int printed = 0; | |
4756b02f MW |
3109 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", |
3110 | bond->params.arp_interval); | |
3111 | ||
3112 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3113 | ||
3d632c3f | 3114 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
4756b02f | 3115 | if (!bond->params.arp_targets[i]) |
5a31bec0 | 3116 | break; |
4756b02f MW |
3117 | if (printed) |
3118 | seq_printf(seq, ","); | |
8cf14e38 | 3119 | seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); |
4756b02f MW |
3120 | printed = 1; |
3121 | } | |
3122 | seq_printf(seq, "\n"); | |
3123 | } | |
3124 | ||
1da177e4 LT |
3125 | if (bond->params.mode == BOND_MODE_8023AD) { |
3126 | struct ad_info ad_info; | |
3127 | ||
3128 | seq_puts(seq, "\n802.3ad info\n"); | |
3129 | seq_printf(seq, "LACP rate: %s\n", | |
3130 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
fd989c83 JV |
3131 | seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", |
3132 | ad_select_tbl[bond->params.ad_select].modename); | |
1da177e4 LT |
3133 | |
3134 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3135 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3136 | bond->dev->name); | |
3137 | } else { | |
3138 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3139 | ||
3140 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3141 | ad_info.aggregator_id); | |
3142 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3143 | ad_info.ports); | |
3144 | seq_printf(seq, "\tActor Key: %d\n", | |
3145 | ad_info.actor_key); | |
3146 | seq_printf(seq, "\tPartner Key: %d\n", | |
3147 | ad_info.partner_key); | |
e174961c JB |
3148 | seq_printf(seq, "\tPartner Mac Address: %pM\n", |
3149 | ad_info.partner_system); | |
1da177e4 LT |
3150 | } |
3151 | } | |
3152 | } | |
3153 | ||
3d632c3f SH |
3154 | static void bond_info_show_slave(struct seq_file *seq, |
3155 | const struct slave *slave) | |
1da177e4 LT |
3156 | { |
3157 | struct bonding *bond = seq->private; | |
3158 | ||
3159 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3160 | seq_printf(seq, "MII Status: %s\n", | |
3161 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3162 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3163 | slave->link_failure_count); |
3164 | ||
e174961c | 3165 | seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); |
1da177e4 LT |
3166 | |
3167 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3168 | const struct aggregator *agg | |
3169 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3170 | ||
3d632c3f | 3171 | if (agg) |
1da177e4 LT |
3172 | seq_printf(seq, "Aggregator ID: %d\n", |
3173 | agg->aggregator_identifier); | |
3d632c3f | 3174 | else |
1da177e4 | 3175 | seq_puts(seq, "Aggregator ID: N/A\n"); |
1da177e4 LT |
3176 | } |
3177 | } | |
3178 | ||
3179 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3180 | { | |
3181 | if (v == SEQ_START_TOKEN) { | |
3182 | seq_printf(seq, "%s\n", version); | |
3183 | bond_info_show_master(seq); | |
3d632c3f | 3184 | } else |
1da177e4 | 3185 | bond_info_show_slave(seq, v); |
1da177e4 LT |
3186 | |
3187 | return 0; | |
3188 | } | |
3189 | ||
4101dec9 | 3190 | static const struct seq_operations bond_info_seq_ops = { |
1da177e4 LT |
3191 | .start = bond_info_seq_start, |
3192 | .next = bond_info_seq_next, | |
3193 | .stop = bond_info_seq_stop, | |
3194 | .show = bond_info_seq_show, | |
3195 | }; | |
3196 | ||
3197 | static int bond_info_open(struct inode *inode, struct file *file) | |
3198 | { | |
3199 | struct seq_file *seq; | |
3200 | struct proc_dir_entry *proc; | |
3201 | int res; | |
3202 | ||
3203 | res = seq_open(file, &bond_info_seq_ops); | |
3204 | if (!res) { | |
3205 | /* recover the pointer buried in proc_dir_entry data */ | |
3206 | seq = file->private_data; | |
3207 | proc = PDE(inode); | |
3208 | seq->private = proc->data; | |
3209 | } | |
3210 | ||
3211 | return res; | |
3212 | } | |
3213 | ||
d54b1fdb | 3214 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3215 | .owner = THIS_MODULE, |
3216 | .open = bond_info_open, | |
3217 | .read = seq_read, | |
3218 | .llseek = seq_lseek, | |
3219 | .release = seq_release, | |
3220 | }; | |
3221 | ||
38fc0026 | 3222 | static void bond_create_proc_entry(struct bonding *bond) |
1da177e4 LT |
3223 | { |
3224 | struct net_device *bond_dev = bond->dev; | |
ec87fd3b | 3225 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
1da177e4 | 3226 | |
ec87fd3b | 3227 | if (bn->proc_dir) { |
a95609cb | 3228 | bond->proc_entry = proc_create_data(bond_dev->name, |
ec87fd3b | 3229 | S_IRUGO, bn->proc_dir, |
a95609cb | 3230 | &bond_info_fops, bond); |
3d632c3f | 3231 | if (bond->proc_entry == NULL) |
a4aee5c8 JP |
3232 | pr_warning("Warning: Cannot create /proc/net/%s/%s\n", |
3233 | DRV_NAME, bond_dev->name); | |
3d632c3f | 3234 | else |
1da177e4 | 3235 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
1da177e4 | 3236 | } |
1da177e4 LT |
3237 | } |
3238 | ||
3239 | static void bond_remove_proc_entry(struct bonding *bond) | |
3240 | { | |
ec87fd3b EB |
3241 | struct net_device *bond_dev = bond->dev; |
3242 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); | |
3243 | ||
3244 | if (bn->proc_dir && bond->proc_entry) { | |
3245 | remove_proc_entry(bond->proc_file_name, bn->proc_dir); | |
1da177e4 LT |
3246 | memset(bond->proc_file_name, 0, IFNAMSIZ); |
3247 | bond->proc_entry = NULL; | |
3248 | } | |
3249 | } | |
3250 | ||
3251 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3252 | * Caller must hold rtnl_lock. | |
3253 | */ | |
2c8c1e72 | 3254 | static void __net_init bond_create_proc_dir(struct bond_net *bn) |
1da177e4 | 3255 | { |
ec87fd3b EB |
3256 | if (!bn->proc_dir) { |
3257 | bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); | |
3258 | if (!bn->proc_dir) | |
a4aee5c8 JP |
3259 | pr_warning("Warning: cannot create /proc/net/%s\n", |
3260 | DRV_NAME); | |
1da177e4 LT |
3261 | } |
3262 | } | |
3263 | ||
3264 | /* Destroy the bonding directory under /proc/net, if empty. | |
3265 | * Caller must hold rtnl_lock. | |
3266 | */ | |
2c8c1e72 | 3267 | static void __net_exit bond_destroy_proc_dir(struct bond_net *bn) |
1da177e4 | 3268 | { |
ec87fd3b EB |
3269 | if (bn->proc_dir) { |
3270 | remove_proc_entry(DRV_NAME, bn->net->proc_net); | |
3271 | bn->proc_dir = NULL; | |
1da177e4 LT |
3272 | } |
3273 | } | |
aee64faf JP |
3274 | |
3275 | #else /* !CONFIG_PROC_FS */ | |
3276 | ||
38fc0026 | 3277 | static void bond_create_proc_entry(struct bonding *bond) |
aee64faf JP |
3278 | { |
3279 | } | |
3280 | ||
3281 | static void bond_remove_proc_entry(struct bonding *bond) | |
3282 | { | |
3283 | } | |
3284 | ||
2c8c1e72 | 3285 | static inline void bond_create_proc_dir(struct bond_net *bn) |
aee64faf JP |
3286 | { |
3287 | } | |
3288 | ||
2c8c1e72 | 3289 | static inline void bond_destroy_proc_dir(struct bond_net *bn) |
aee64faf JP |
3290 | { |
3291 | } | |
3292 | ||
1da177e4 LT |
3293 | #endif /* CONFIG_PROC_FS */ |
3294 | ||
aee64faf | 3295 | |
1da177e4 LT |
3296 | /*-------------------------- netdev event handling --------------------------*/ |
3297 | ||
3298 | /* | |
3299 | * Change device name | |
3300 | */ | |
3301 | static int bond_event_changename(struct bonding *bond) | |
3302 | { | |
1da177e4 LT |
3303 | bond_remove_proc_entry(bond); |
3304 | bond_create_proc_entry(bond); | |
7e083840 | 3305 | |
1da177e4 LT |
3306 | return NOTIFY_DONE; |
3307 | } | |
3308 | ||
3d632c3f SH |
3309 | static int bond_master_netdev_event(unsigned long event, |
3310 | struct net_device *bond_dev) | |
1da177e4 | 3311 | { |
454d7c9b | 3312 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3313 | |
3314 | switch (event) { | |
3315 | case NETDEV_CHANGENAME: | |
3316 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3317 | default: |
3318 | break; | |
3319 | } | |
3320 | ||
3321 | return NOTIFY_DONE; | |
3322 | } | |
3323 | ||
3d632c3f SH |
3324 | static int bond_slave_netdev_event(unsigned long event, |
3325 | struct net_device *slave_dev) | |
1da177e4 LT |
3326 | { |
3327 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3328 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3329 | |
3330 | switch (event) { | |
3331 | case NETDEV_UNREGISTER: | |
3332 | if (bond_dev) { | |
1284cd3a JV |
3333 | if (bond->setup_by_slave) |
3334 | bond_release_and_destroy(bond_dev, slave_dev); | |
3335 | else | |
3336 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3337 | } |
3338 | break; | |
3339 | case NETDEV_CHANGE: | |
17d04500 JV |
3340 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3341 | struct slave *slave; | |
3342 | ||
3343 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3344 | if (slave) { | |
3345 | u16 old_speed = slave->speed; | |
3346 | u16 old_duplex = slave->duplex; | |
3347 | ||
3348 | bond_update_speed_duplex(slave); | |
3349 | ||
3350 | if (bond_is_lb(bond)) | |
3351 | break; | |
3352 | ||
3353 | if (old_speed != slave->speed) | |
3354 | bond_3ad_adapter_speed_changed(slave); | |
3355 | if (old_duplex != slave->duplex) | |
3356 | bond_3ad_adapter_duplex_changed(slave); | |
3357 | } | |
3358 | } | |
3359 | ||
1da177e4 LT |
3360 | break; |
3361 | case NETDEV_DOWN: | |
3362 | /* | |
3363 | * ... Or is it this? | |
3364 | */ | |
3365 | break; | |
3366 | case NETDEV_CHANGEMTU: | |
3367 | /* | |
3368 | * TODO: Should slaves be allowed to | |
3369 | * independently alter their MTU? For | |
3370 | * an active-backup bond, slaves need | |
3371 | * not be the same type of device, so | |
3372 | * MTUs may vary. For other modes, | |
3373 | * slaves arguably should have the | |
3374 | * same MTUs. To do this, we'd need to | |
3375 | * take over the slave's change_mtu | |
3376 | * function for the duration of their | |
3377 | * servitude. | |
3378 | */ | |
3379 | break; | |
3380 | case NETDEV_CHANGENAME: | |
3381 | /* | |
3382 | * TODO: handle changing the primary's name | |
3383 | */ | |
3384 | break; | |
8531c5ff AK |
3385 | case NETDEV_FEAT_CHANGE: |
3386 | bond_compute_features(bond); | |
3387 | break; | |
1da177e4 LT |
3388 | default: |
3389 | break; | |
3390 | } | |
3391 | ||
3392 | return NOTIFY_DONE; | |
3393 | } | |
3394 | ||
3395 | /* | |
3396 | * bond_netdev_event: handle netdev notifier chain events. | |
3397 | * | |
3398 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3399 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3400 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3401 | * dev_probe_lock). | |
3402 | */ | |
3d632c3f SH |
3403 | static int bond_netdev_event(struct notifier_block *this, |
3404 | unsigned long event, void *ptr) | |
1da177e4 LT |
3405 | { |
3406 | struct net_device *event_dev = (struct net_device *)ptr; | |
3407 | ||
5a03cdb7 | 3408 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3409 | event_dev ? event_dev->name : "None", |
3410 | event); | |
1da177e4 | 3411 | |
0b680e75 JV |
3412 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3413 | return NOTIFY_DONE; | |
3414 | ||
1da177e4 | 3415 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3416 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3417 | return bond_master_netdev_event(event, event_dev); |
3418 | } | |
3419 | ||
3420 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3421 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3422 | return bond_slave_netdev_event(event, event_dev); |
3423 | } | |
3424 | ||
3425 | return NOTIFY_DONE; | |
3426 | } | |
3427 | ||
c3ade5ca JV |
3428 | /* |
3429 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3430 | * | |
3431 | * We keep track of device IPs primarily to use as source addresses in | |
3432 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3433 | * | |
3434 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3435 | */ | |
3436 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3437 | { | |
3438 | struct in_ifaddr *ifa = ptr; | |
3439 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3440 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3441 | struct bonding *bond; |
3442 | struct vlan_entry *vlan; | |
c3ade5ca | 3443 | |
ec87fd3b | 3444 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3445 | if (bond->dev == event_dev) { |
3446 | switch (event) { | |
3447 | case NETDEV_UP: | |
3448 | bond->master_ip = ifa->ifa_local; | |
3449 | return NOTIFY_OK; | |
3450 | case NETDEV_DOWN: | |
3451 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3452 | return NOTIFY_OK; | |
3453 | default: | |
3454 | return NOTIFY_DONE; | |
3455 | } | |
3456 | } | |
3457 | ||
0883beca | 3458 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 3459 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3460 | if (vlan_dev == event_dev) { |
3461 | switch (event) { | |
3462 | case NETDEV_UP: | |
3463 | vlan->vlan_ip = ifa->ifa_local; | |
3464 | return NOTIFY_OK; | |
3465 | case NETDEV_DOWN: | |
3466 | vlan->vlan_ip = | |
3467 | bond_glean_dev_ip(vlan_dev); | |
3468 | return NOTIFY_OK; | |
3469 | default: | |
3470 | return NOTIFY_DONE; | |
3471 | } | |
3472 | } | |
3473 | } | |
3474 | } | |
3475 | return NOTIFY_DONE; | |
3476 | } | |
3477 | ||
1da177e4 LT |
3478 | static struct notifier_block bond_netdev_notifier = { |
3479 | .notifier_call = bond_netdev_event, | |
3480 | }; | |
3481 | ||
c3ade5ca JV |
3482 | static struct notifier_block bond_inetaddr_notifier = { |
3483 | .notifier_call = bond_inetaddr_event, | |
3484 | }; | |
3485 | ||
1da177e4 LT |
3486 | /*-------------------------- Packet type handling ---------------------------*/ |
3487 | ||
3488 | /* register to receive lacpdus on a bond */ | |
3489 | static void bond_register_lacpdu(struct bonding *bond) | |
3490 | { | |
3491 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3492 | ||
3493 | /* initialize packet type */ | |
3494 | pk_type->type = PKT_TYPE_LACPDU; | |
3495 | pk_type->dev = bond->dev; | |
3496 | pk_type->func = bond_3ad_lacpdu_recv; | |
3497 | ||
3498 | dev_add_pack(pk_type); | |
3499 | } | |
3500 | ||
3501 | /* unregister to receive lacpdus on a bond */ | |
3502 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3503 | { | |
3504 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3505 | } | |
3506 | ||
f5b2b966 JV |
3507 | void bond_register_arp(struct bonding *bond) |
3508 | { | |
3509 | struct packet_type *pt = &bond->arp_mon_pt; | |
3510 | ||
c4f283b1 JV |
3511 | if (pt->type) |
3512 | return; | |
3513 | ||
f5b2b966 | 3514 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3515 | pt->dev = bond->dev; |
f5b2b966 JV |
3516 | pt->func = bond_arp_rcv; |
3517 | dev_add_pack(pt); | |
3518 | } | |
3519 | ||
3520 | void bond_unregister_arp(struct bonding *bond) | |
3521 | { | |
c4f283b1 JV |
3522 | struct packet_type *pt = &bond->arp_mon_pt; |
3523 | ||
3524 | dev_remove_pack(pt); | |
3525 | pt->type = 0; | |
f5b2b966 JV |
3526 | } |
3527 | ||
169a3e66 JV |
3528 | /*---------------------------- Hashing Policies -----------------------------*/ |
3529 | ||
6f6652be JV |
3530 | /* |
3531 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3532 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3533 | */ | |
a361c83c | 3534 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3535 | { |
3536 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3537 | struct iphdr *iph = ip_hdr(skb); | |
3538 | ||
f14c4e4e | 3539 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3540 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3541 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3542 | } |
3543 | ||
d3da6831 | 3544 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3545 | } |
3546 | ||
169a3e66 | 3547 | /* |
59c51591 | 3548 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3549 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3550 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3551 | */ | |
a361c83c | 3552 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3553 | { |
3554 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3555 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3556 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3557 | int layer4_xor = 0; |
3558 | ||
f14c4e4e BH |
3559 | if (skb->protocol == htons(ETH_P_IP)) { |
3560 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3561 | (iph->protocol == IPPROTO_TCP || |
3562 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3563 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3564 | } |
3565 | return (layer4_xor ^ | |
3566 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3567 | ||
3568 | } | |
3569 | ||
d3da6831 | 3570 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3571 | } |
3572 | ||
3573 | /* | |
3574 | * Hash for the output device based upon layer 2 data | |
3575 | */ | |
a361c83c | 3576 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3577 | { |
3578 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3579 | ||
d3da6831 | 3580 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3581 | } |
3582 | ||
1da177e4 LT |
3583 | /*-------------------------- Device entry points ----------------------------*/ |
3584 | ||
3585 | static int bond_open(struct net_device *bond_dev) | |
3586 | { | |
454d7c9b | 3587 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3588 | |
3589 | bond->kill_timers = 0; | |
3590 | ||
58402054 | 3591 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3592 | /* bond_alb_initialize must be called before the timer |
3593 | * is started. | |
3594 | */ | |
3595 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3596 | /* something went wrong - fail the open operation */ | |
b473946a | 3597 | return -ENOMEM; |
1da177e4 LT |
3598 | } |
3599 | ||
1b76b316 JV |
3600 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3601 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3602 | } |
3603 | ||
3604 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3605 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3606 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3607 | } |
3608 | ||
3609 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3610 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3611 | INIT_DELAYED_WORK(&bond->arp_work, | |
3612 | bond_activebackup_arp_mon); | |
3613 | else | |
3614 | INIT_DELAYED_WORK(&bond->arp_work, | |
3615 | bond_loadbalance_arp_mon); | |
3616 | ||
3617 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3618 | if (bond->params.arp_validate) |
3619 | bond_register_arp(bond); | |
1da177e4 LT |
3620 | } |
3621 | ||
3622 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3623 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3624 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3625 | /* register to receive LACPDUs */ |
3626 | bond_register_lacpdu(bond); | |
fd989c83 | 3627 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3628 | } |
3629 | ||
3630 | return 0; | |
3631 | } | |
3632 | ||
3633 | static int bond_close(struct net_device *bond_dev) | |
3634 | { | |
454d7c9b | 3635 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3636 | |
3637 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3638 | /* Unregister the receive of LACPDUs */ | |
3639 | bond_unregister_lacpdu(bond); | |
3640 | } | |
3641 | ||
f5b2b966 JV |
3642 | if (bond->params.arp_validate) |
3643 | bond_unregister_arp(bond); | |
3644 | ||
1da177e4 LT |
3645 | write_lock_bh(&bond->lock); |
3646 | ||
b59f9f74 | 3647 | bond->send_grat_arp = 0; |
305d552a | 3648 | bond->send_unsol_na = 0; |
1da177e4 LT |
3649 | |
3650 | /* signal timers not to re-arm */ | |
3651 | bond->kill_timers = 1; | |
3652 | ||
3653 | write_unlock_bh(&bond->lock); | |
3654 | ||
1da177e4 | 3655 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3656 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3657 | } |
3658 | ||
3659 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3660 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3661 | } |
3662 | ||
3663 | switch (bond->params.mode) { | |
3664 | case BOND_MODE_8023AD: | |
1b76b316 | 3665 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3666 | break; |
3667 | case BOND_MODE_TLB: | |
3668 | case BOND_MODE_ALB: | |
1b76b316 | 3669 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3670 | break; |
3671 | default: | |
3672 | break; | |
3673 | } | |
3674 | ||
1da177e4 | 3675 | |
58402054 | 3676 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3677 | /* Must be called only after all |
3678 | * slaves have been released | |
3679 | */ | |
3680 | bond_alb_deinitialize(bond); | |
3681 | } | |
3682 | ||
3683 | return 0; | |
3684 | } | |
3685 | ||
3686 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3687 | { | |
454d7c9b | 3688 | struct bonding *bond = netdev_priv(bond_dev); |
35cfabdc | 3689 | struct net_device_stats *stats = &bond_dev->stats; |
2439f9eb | 3690 | struct net_device_stats local_stats; |
1da177e4 LT |
3691 | struct slave *slave; |
3692 | int i; | |
3693 | ||
2439f9eb | 3694 | memset(&local_stats, 0, sizeof(struct net_device_stats)); |
1da177e4 LT |
3695 | |
3696 | read_lock_bh(&bond->lock); | |
3697 | ||
3698 | bond_for_each_slave(bond, slave, i) { | |
eeda3fd6 SH |
3699 | const struct net_device_stats *sstats = dev_get_stats(slave->dev); |
3700 | ||
2439f9eb AG |
3701 | local_stats.rx_packets += sstats->rx_packets; |
3702 | local_stats.rx_bytes += sstats->rx_bytes; | |
3703 | local_stats.rx_errors += sstats->rx_errors; | |
3704 | local_stats.rx_dropped += sstats->rx_dropped; | |
3705 | ||
3706 | local_stats.tx_packets += sstats->tx_packets; | |
3707 | local_stats.tx_bytes += sstats->tx_bytes; | |
3708 | local_stats.tx_errors += sstats->tx_errors; | |
3709 | local_stats.tx_dropped += sstats->tx_dropped; | |
3710 | ||
3711 | local_stats.multicast += sstats->multicast; | |
3712 | local_stats.collisions += sstats->collisions; | |
3713 | ||
3714 | local_stats.rx_length_errors += sstats->rx_length_errors; | |
3715 | local_stats.rx_over_errors += sstats->rx_over_errors; | |
3716 | local_stats.rx_crc_errors += sstats->rx_crc_errors; | |
3717 | local_stats.rx_frame_errors += sstats->rx_frame_errors; | |
3718 | local_stats.rx_fifo_errors += sstats->rx_fifo_errors; | |
3719 | local_stats.rx_missed_errors += sstats->rx_missed_errors; | |
3720 | ||
3721 | local_stats.tx_aborted_errors += sstats->tx_aborted_errors; | |
3722 | local_stats.tx_carrier_errors += sstats->tx_carrier_errors; | |
3723 | local_stats.tx_fifo_errors += sstats->tx_fifo_errors; | |
3724 | local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3725 | local_stats.tx_window_errors += sstats->tx_window_errors; | |
3726 | } | |
3727 | ||
3728 | memcpy(stats, &local_stats, sizeof(struct net_device_stats)); | |
1da177e4 LT |
3729 | |
3730 | read_unlock_bh(&bond->lock); | |
3731 | ||
3732 | return stats; | |
3733 | } | |
3734 | ||
3735 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3736 | { | |
3737 | struct net_device *slave_dev = NULL; | |
3738 | struct ifbond k_binfo; | |
3739 | struct ifbond __user *u_binfo = NULL; | |
3740 | struct ifslave k_sinfo; | |
3741 | struct ifslave __user *u_sinfo = NULL; | |
3742 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3743 | int res = 0; |
3744 | ||
a4aee5c8 | 3745 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3746 | |
3747 | switch (cmd) { | |
1da177e4 LT |
3748 | case SIOCGMIIPHY: |
3749 | mii = if_mii(ifr); | |
3d632c3f | 3750 | if (!mii) |
1da177e4 | 3751 | return -EINVAL; |
3d632c3f | 3752 | |
1da177e4 LT |
3753 | mii->phy_id = 0; |
3754 | /* Fall Through */ | |
3755 | case SIOCGMIIREG: | |
3756 | /* | |
3757 | * We do this again just in case we were called by SIOCGMIIREG | |
3758 | * instead of SIOCGMIIPHY. | |
3759 | */ | |
3760 | mii = if_mii(ifr); | |
3d632c3f | 3761 | if (!mii) |
1da177e4 | 3762 | return -EINVAL; |
3d632c3f | 3763 | |
1da177e4 LT |
3764 | |
3765 | if (mii->reg_num == 1) { | |
454d7c9b | 3766 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3767 | mii->val_out = 0; |
6603a6f2 | 3768 | read_lock(&bond->lock); |
1da177e4 | 3769 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3770 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3771 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3772 | |
1da177e4 | 3773 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3774 | read_unlock(&bond->lock); |
1da177e4 LT |
3775 | } |
3776 | ||
3777 | return 0; | |
3778 | case BOND_INFO_QUERY_OLD: | |
3779 | case SIOCBONDINFOQUERY: | |
3780 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3781 | ||
3d632c3f | 3782 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3783 | return -EFAULT; |
1da177e4 LT |
3784 | |
3785 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3786 | if (res == 0 && |
3787 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3788 | return -EFAULT; | |
1da177e4 LT |
3789 | |
3790 | return res; | |
3791 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3792 | case SIOCBONDSLAVEINFOQUERY: | |
3793 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3794 | ||
3d632c3f | 3795 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3796 | return -EFAULT; |
1da177e4 LT |
3797 | |
3798 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3799 | if (res == 0 && |
3800 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3801 | return -EFAULT; | |
1da177e4 LT |
3802 | |
3803 | return res; | |
3804 | default: | |
3805 | /* Go on */ | |
3806 | break; | |
3807 | } | |
3808 | ||
3d632c3f | 3809 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3810 | return -EPERM; |
1da177e4 | 3811 | |
ec87fd3b | 3812 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3813 | |
a4aee5c8 | 3814 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3815 | |
3d632c3f | 3816 | if (!slave_dev) |
1da177e4 | 3817 | res = -ENODEV; |
3d632c3f | 3818 | else { |
a4aee5c8 | 3819 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3820 | switch (cmd) { |
3821 | case BOND_ENSLAVE_OLD: | |
3822 | case SIOCBONDENSLAVE: | |
3823 | res = bond_enslave(bond_dev, slave_dev); | |
3824 | break; | |
3825 | case BOND_RELEASE_OLD: | |
3826 | case SIOCBONDRELEASE: | |
3827 | res = bond_release(bond_dev, slave_dev); | |
3828 | break; | |
3829 | case BOND_SETHWADDR_OLD: | |
3830 | case SIOCBONDSETHWADDR: | |
3831 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3832 | break; | |
3833 | case BOND_CHANGE_ACTIVE_OLD: | |
3834 | case SIOCBONDCHANGEACTIVE: | |
3835 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3836 | break; | |
3837 | default: | |
3838 | res = -EOPNOTSUPP; | |
3839 | } | |
3840 | ||
3841 | dev_put(slave_dev); | |
3842 | } | |
3843 | ||
1da177e4 LT |
3844 | return res; |
3845 | } | |
3846 | ||
22bedad3 JP |
3847 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3848 | struct netdev_hw_addr_list *list, | |
3849 | int addrlen) | |
3850 | { | |
3851 | struct netdev_hw_addr *ha; | |
3852 | ||
3853 | netdev_hw_addr_list_for_each(ha, list) | |
3854 | if (!memcmp(ha->addr, addr, addrlen)) | |
3855 | return true; | |
3856 | ||
3857 | return false; | |
3858 | } | |
3859 | ||
1da177e4 LT |
3860 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3861 | { | |
454d7c9b | 3862 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 JP |
3863 | struct netdev_hw_addr *ha; |
3864 | bool found; | |
1da177e4 | 3865 | |
1da177e4 LT |
3866 | /* |
3867 | * Do promisc before checking multicast_mode | |
3868 | */ | |
3d632c3f | 3869 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
3870 | /* |
3871 | * FIXME: Need to handle the error when one of the multi-slaves | |
3872 | * encounters error. | |
3873 | */ | |
1da177e4 | 3874 | bond_set_promiscuity(bond, 1); |
1da177e4 | 3875 | |
3d632c3f SH |
3876 | |
3877 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 3878 | bond_set_promiscuity(bond, -1); |
3d632c3f | 3879 | |
1da177e4 LT |
3880 | |
3881 | /* set allmulti flag to slaves */ | |
3d632c3f | 3882 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
3883 | /* |
3884 | * FIXME: Need to handle the error when one of the multi-slaves | |
3885 | * encounters error. | |
3886 | */ | |
1da177e4 | 3887 | bond_set_allmulti(bond, 1); |
1da177e4 | 3888 | |
3d632c3f SH |
3889 | |
3890 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 3891 | bond_set_allmulti(bond, -1); |
3d632c3f | 3892 | |
1da177e4 | 3893 | |
80ee5ad2 JV |
3894 | read_lock(&bond->lock); |
3895 | ||
1da177e4 LT |
3896 | bond->flags = bond_dev->flags; |
3897 | ||
3898 | /* looking for addresses to add to slaves' mc list */ | |
22bedad3 JP |
3899 | netdev_for_each_mc_addr(ha, bond_dev) { |
3900 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3901 | bond_dev->addr_len); | |
3902 | if (!found) | |
3903 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3904 | } |
3905 | ||
3906 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3907 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3908 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3909 | bond_dev->addr_len); | |
3910 | if (!found) | |
3911 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3912 | } |
3913 | ||
3914 | /* save master's multicast list */ | |
22bedad3 JP |
3915 | __hw_addr_flush(&bond->mc_list); |
3916 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3917 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3918 | |
80ee5ad2 | 3919 | read_unlock(&bond->lock); |
1da177e4 LT |
3920 | } |
3921 | ||
00829823 SH |
3922 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3923 | { | |
3924 | struct bonding *bond = netdev_priv(dev); | |
3925 | struct slave *slave = bond->first_slave; | |
3926 | ||
3927 | if (slave) { | |
3928 | const struct net_device_ops *slave_ops | |
3929 | = slave->dev->netdev_ops; | |
3930 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3931 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3932 | } |
3933 | return 0; | |
3934 | } | |
3935 | ||
1da177e4 LT |
3936 | /* |
3937 | * Change the MTU of all of a master's slaves to match the master | |
3938 | */ | |
3939 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3940 | { | |
454d7c9b | 3941 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3942 | struct slave *slave, *stop_at; |
3943 | int res = 0; | |
3944 | int i; | |
3945 | ||
5a03cdb7 | 3946 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3947 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3948 | |
3949 | /* Can't hold bond->lock with bh disabled here since | |
3950 | * some base drivers panic. On the other hand we can't | |
3951 | * hold bond->lock without bh disabled because we'll | |
3952 | * deadlock. The only solution is to rely on the fact | |
3953 | * that we're under rtnl_lock here, and the slaves | |
3954 | * list won't change. This doesn't solve the problem | |
3955 | * of setting the slave's MTU while it is | |
3956 | * transmitting, but the assumption is that the base | |
3957 | * driver can handle that. | |
3958 | * | |
3959 | * TODO: figure out a way to safely iterate the slaves | |
3960 | * list, but without holding a lock around the actual | |
3961 | * call to the base driver. | |
3962 | */ | |
3963 | ||
3964 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3965 | pr_debug("s %p s->p %p c_m %p\n", |
3966 | slave, | |
3967 | slave->prev, | |
3968 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3969 | |
1da177e4 LT |
3970 | res = dev_set_mtu(slave->dev, new_mtu); |
3971 | ||
3972 | if (res) { | |
3973 | /* If we failed to set the slave's mtu to the new value | |
3974 | * we must abort the operation even in ACTIVE_BACKUP | |
3975 | * mode, because if we allow the backup slaves to have | |
3976 | * different mtu values than the active slave we'll | |
3977 | * need to change their mtu when doing a failover. That | |
3978 | * means changing their mtu from timer context, which | |
3979 | * is probably not a good idea. | |
3980 | */ | |
5a03cdb7 | 3981 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3982 | goto unwind; |
3983 | } | |
3984 | } | |
3985 | ||
3986 | bond_dev->mtu = new_mtu; | |
3987 | ||
3988 | return 0; | |
3989 | ||
3990 | unwind: | |
3991 | /* unwind from head to the slave that failed */ | |
3992 | stop_at = slave; | |
3993 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3994 | int tmp_res; | |
3995 | ||
3996 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3997 | if (tmp_res) { | |
a4aee5c8 JP |
3998 | pr_debug("unwind err %d dev %s\n", |
3999 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4000 | } |
4001 | } | |
4002 | ||
4003 | return res; | |
4004 | } | |
4005 | ||
4006 | /* | |
4007 | * Change HW address | |
4008 | * | |
4009 | * Note that many devices must be down to change the HW address, and | |
4010 | * downing the master releases all slaves. We can make bonds full of | |
4011 | * bonding devices to test this, however. | |
4012 | */ | |
4013 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4014 | { | |
454d7c9b | 4015 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4016 | struct sockaddr *sa = addr, tmp_sa; |
4017 | struct slave *slave, *stop_at; | |
4018 | int res = 0; | |
4019 | int i; | |
4020 | ||
eb7cc59a SH |
4021 | if (bond->params.mode == BOND_MODE_ALB) |
4022 | return bond_alb_set_mac_address(bond_dev, addr); | |
4023 | ||
4024 | ||
a4aee5c8 JP |
4025 | pr_debug("bond=%p, name=%s\n", |
4026 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 4027 | |
dd957c57 | 4028 | /* |
3915c1e8 JV |
4029 | * If fail_over_mac is set to active, do nothing and return |
4030 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4031 | */ |
3915c1e8 | 4032 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4033 | return 0; |
2ab82852 | 4034 | |
3d632c3f | 4035 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 4036 | return -EADDRNOTAVAIL; |
1da177e4 LT |
4037 | |
4038 | /* Can't hold bond->lock with bh disabled here since | |
4039 | * some base drivers panic. On the other hand we can't | |
4040 | * hold bond->lock without bh disabled because we'll | |
4041 | * deadlock. The only solution is to rely on the fact | |
4042 | * that we're under rtnl_lock here, and the slaves | |
4043 | * list won't change. This doesn't solve the problem | |
4044 | * of setting the slave's hw address while it is | |
4045 | * transmitting, but the assumption is that the base | |
4046 | * driver can handle that. | |
4047 | * | |
4048 | * TODO: figure out a way to safely iterate the slaves | |
4049 | * list, but without holding a lock around the actual | |
4050 | * call to the base driver. | |
4051 | */ | |
4052 | ||
4053 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 4054 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 4055 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 4056 | |
eb7cc59a | 4057 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 4058 | res = -EOPNOTSUPP; |
5a03cdb7 | 4059 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
4060 | goto unwind; |
4061 | } | |
4062 | ||
4063 | res = dev_set_mac_address(slave->dev, addr); | |
4064 | if (res) { | |
4065 | /* TODO: consider downing the slave | |
4066 | * and retry ? | |
4067 | * User should expect communications | |
4068 | * breakage anyway until ARP finish | |
4069 | * updating, so... | |
4070 | */ | |
5a03cdb7 | 4071 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4072 | goto unwind; |
4073 | } | |
4074 | } | |
4075 | ||
4076 | /* success */ | |
4077 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4078 | return 0; | |
4079 | ||
4080 | unwind: | |
4081 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4082 | tmp_sa.sa_family = bond_dev->type; | |
4083 | ||
4084 | /* unwind from head to the slave that failed */ | |
4085 | stop_at = slave; | |
4086 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4087 | int tmp_res; | |
4088 | ||
4089 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4090 | if (tmp_res) { | |
a4aee5c8 JP |
4091 | pr_debug("unwind err %d dev %s\n", |
4092 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4093 | } |
4094 | } | |
4095 | ||
4096 | return res; | |
4097 | } | |
4098 | ||
4099 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4100 | { | |
454d7c9b | 4101 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4102 | struct slave *slave, *start_at; |
cf5f9044 | 4103 | int i, slave_no, res = 1; |
a2fd940f | 4104 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 LT |
4105 | |
4106 | read_lock(&bond->lock); | |
4107 | ||
3d632c3f | 4108 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4109 | goto out; |
cf5f9044 | 4110 | /* |
a2fd940f AG |
4111 | * Start with the curr_active_slave that joined the bond as the |
4112 | * default for sending IGMP traffic. For failover purposes one | |
4113 | * needs to maintain some consistency for the interface that will | |
4114 | * send the join/membership reports. The curr_active_slave found | |
4115 | * will send all of this type of traffic. | |
cf5f9044 | 4116 | */ |
00ae7028 | 4117 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 4118 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 4119 | |
a2fd940f AG |
4120 | read_lock(&bond->curr_slave_lock); |
4121 | slave = bond->curr_active_slave; | |
4122 | read_unlock(&bond->curr_slave_lock); | |
4123 | ||
4124 | if (!slave) | |
4125 | goto out; | |
4126 | } else { | |
4127 | /* | |
4128 | * Concurrent TX may collide on rr_tx_counter; we accept | |
4129 | * that as being rare enough not to justify using an | |
4130 | * atomic op here. | |
4131 | */ | |
4132 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
4133 | ||
4134 | bond_for_each_slave(bond, slave, i) { | |
4135 | slave_no--; | |
4136 | if (slave_no < 0) | |
4137 | break; | |
4138 | } | |
1da177e4 LT |
4139 | } |
4140 | ||
cf5f9044 | 4141 | start_at = slave; |
1da177e4 LT |
4142 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4143 | if (IS_UP(slave->dev) && | |
4144 | (slave->link == BOND_LINK_UP) && | |
4145 | (slave->state == BOND_STATE_ACTIVE)) { | |
4146 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4147 | break; |
4148 | } | |
4149 | } | |
4150 | ||
1da177e4 LT |
4151 | out: |
4152 | if (res) { | |
4153 | /* no suitable interface, frame not sent */ | |
4154 | dev_kfree_skb(skb); | |
4155 | } | |
4156 | read_unlock(&bond->lock); | |
ec634fe3 | 4157 | return NETDEV_TX_OK; |
1da177e4 LT |
4158 | } |
4159 | ||
075897ce | 4160 | |
1da177e4 LT |
4161 | /* |
4162 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4163 | * the bond has a usable interface. | |
4164 | */ | |
4165 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4166 | { | |
454d7c9b | 4167 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4168 | int res = 1; |
4169 | ||
1da177e4 LT |
4170 | read_lock(&bond->lock); |
4171 | read_lock(&bond->curr_slave_lock); | |
4172 | ||
3d632c3f | 4173 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4174 | goto out; |
1da177e4 | 4175 | |
075897ce JL |
4176 | if (!bond->curr_active_slave) |
4177 | goto out; | |
4178 | ||
075897ce JL |
4179 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4180 | ||
1da177e4 | 4181 | out: |
3d632c3f | 4182 | if (res) |
1da177e4 LT |
4183 | /* no suitable interface, frame not sent */ |
4184 | dev_kfree_skb(skb); | |
3d632c3f | 4185 | |
1da177e4 LT |
4186 | read_unlock(&bond->curr_slave_lock); |
4187 | read_unlock(&bond->lock); | |
ec634fe3 | 4188 | return NETDEV_TX_OK; |
1da177e4 LT |
4189 | } |
4190 | ||
4191 | /* | |
169a3e66 JV |
4192 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4193 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4194 | * find the next active slave. | |
1da177e4 LT |
4195 | */ |
4196 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4197 | { | |
454d7c9b | 4198 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4199 | struct slave *slave, *start_at; |
4200 | int slave_no; | |
4201 | int i; | |
4202 | int res = 1; | |
4203 | ||
4204 | read_lock(&bond->lock); | |
4205 | ||
3d632c3f | 4206 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4207 | goto out; |
1da177e4 | 4208 | |
a361c83c | 4209 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4210 | |
4211 | bond_for_each_slave(bond, slave, i) { | |
4212 | slave_no--; | |
3d632c3f | 4213 | if (slave_no < 0) |
1da177e4 | 4214 | break; |
1da177e4 LT |
4215 | } |
4216 | ||
4217 | start_at = slave; | |
4218 | ||
4219 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4220 | if (IS_UP(slave->dev) && | |
4221 | (slave->link == BOND_LINK_UP) && | |
4222 | (slave->state == BOND_STATE_ACTIVE)) { | |
4223 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4224 | break; | |
4225 | } | |
4226 | } | |
4227 | ||
4228 | out: | |
4229 | if (res) { | |
4230 | /* no suitable interface, frame not sent */ | |
4231 | dev_kfree_skb(skb); | |
4232 | } | |
4233 | read_unlock(&bond->lock); | |
ec634fe3 | 4234 | return NETDEV_TX_OK; |
1da177e4 LT |
4235 | } |
4236 | ||
4237 | /* | |
4238 | * in broadcast mode, we send everything to all usable interfaces. | |
4239 | */ | |
4240 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4241 | { | |
454d7c9b | 4242 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4243 | struct slave *slave, *start_at; |
4244 | struct net_device *tx_dev = NULL; | |
4245 | int i; | |
4246 | int res = 1; | |
4247 | ||
4248 | read_lock(&bond->lock); | |
4249 | ||
3d632c3f | 4250 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4251 | goto out; |
1da177e4 LT |
4252 | |
4253 | read_lock(&bond->curr_slave_lock); | |
4254 | start_at = bond->curr_active_slave; | |
4255 | read_unlock(&bond->curr_slave_lock); | |
4256 | ||
3d632c3f | 4257 | if (!start_at) |
1da177e4 | 4258 | goto out; |
1da177e4 LT |
4259 | |
4260 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4261 | if (IS_UP(slave->dev) && | |
4262 | (slave->link == BOND_LINK_UP) && | |
4263 | (slave->state == BOND_STATE_ACTIVE)) { | |
4264 | if (tx_dev) { | |
4265 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4266 | if (!skb2) { | |
a4aee5c8 | 4267 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4268 | bond_dev->name); |
1da177e4 LT |
4269 | continue; |
4270 | } | |
4271 | ||
4272 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4273 | if (res) { | |
4274 | dev_kfree_skb(skb2); | |
4275 | continue; | |
4276 | } | |
4277 | } | |
4278 | tx_dev = slave->dev; | |
4279 | } | |
4280 | } | |
4281 | ||
3d632c3f | 4282 | if (tx_dev) |
1da177e4 | 4283 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4284 | |
4285 | out: | |
3d632c3f | 4286 | if (res) |
1da177e4 LT |
4287 | /* no suitable interface, frame not sent */ |
4288 | dev_kfree_skb(skb); | |
3d632c3f | 4289 | |
1da177e4 LT |
4290 | /* frame sent to all suitable interfaces */ |
4291 | read_unlock(&bond->lock); | |
ec634fe3 | 4292 | return NETDEV_TX_OK; |
1da177e4 LT |
4293 | } |
4294 | ||
4295 | /*------------------------- Device initialization ---------------------------*/ | |
4296 | ||
6f6652be JV |
4297 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4298 | { | |
4299 | switch (bond->params.xmit_policy) { | |
4300 | case BOND_XMIT_POLICY_LAYER23: | |
4301 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4302 | break; | |
4303 | case BOND_XMIT_POLICY_LAYER34: | |
4304 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4305 | break; | |
4306 | case BOND_XMIT_POLICY_LAYER2: | |
4307 | default: | |
4308 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4309 | break; | |
4310 | } | |
4311 | } | |
4312 | ||
424efe9c | 4313 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 SH |
4314 | { |
4315 | const struct bonding *bond = netdev_priv(dev); | |
4316 | ||
4317 | switch (bond->params.mode) { | |
4318 | case BOND_MODE_ROUNDROBIN: | |
4319 | return bond_xmit_roundrobin(skb, dev); | |
4320 | case BOND_MODE_ACTIVEBACKUP: | |
4321 | return bond_xmit_activebackup(skb, dev); | |
4322 | case BOND_MODE_XOR: | |
4323 | return bond_xmit_xor(skb, dev); | |
4324 | case BOND_MODE_BROADCAST: | |
4325 | return bond_xmit_broadcast(skb, dev); | |
4326 | case BOND_MODE_8023AD: | |
4327 | return bond_3ad_xmit_xor(skb, dev); | |
4328 | case BOND_MODE_ALB: | |
4329 | case BOND_MODE_TLB: | |
4330 | return bond_alb_xmit(skb, dev); | |
4331 | default: | |
4332 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4333 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4334 | dev->name, bond->params.mode); | |
00829823 SH |
4335 | WARN_ON_ONCE(1); |
4336 | dev_kfree_skb(skb); | |
4337 | return NETDEV_TX_OK; | |
4338 | } | |
4339 | } | |
4340 | ||
4341 | ||
1da177e4 LT |
4342 | /* |
4343 | * set bond mode specific net device operations | |
4344 | */ | |
a77b5325 | 4345 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4346 | { |
169a3e66 JV |
4347 | struct net_device *bond_dev = bond->dev; |
4348 | ||
1da177e4 LT |
4349 | switch (mode) { |
4350 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4351 | break; |
4352 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4353 | break; |
4354 | case BOND_MODE_XOR: | |
6f6652be | 4355 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4356 | break; |
4357 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4358 | break; |
4359 | case BOND_MODE_8023AD: | |
8f903c70 | 4360 | bond_set_master_3ad_flags(bond); |
6f6652be | 4361 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4362 | break; |
1da177e4 | 4363 | case BOND_MODE_ALB: |
8f903c70 JV |
4364 | bond_set_master_alb_flags(bond); |
4365 | /* FALLTHRU */ | |
4366 | case BOND_MODE_TLB: | |
1da177e4 LT |
4367 | break; |
4368 | default: | |
4369 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4370 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4371 | bond_dev->name, mode); | |
1da177e4 LT |
4372 | break; |
4373 | } | |
4374 | } | |
4375 | ||
217df670 JV |
4376 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4377 | struct ethtool_drvinfo *drvinfo) | |
4378 | { | |
4379 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4380 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4381 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4382 | } | |
4383 | ||
7282d491 | 4384 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4385 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4386 | .get_link = ethtool_op_get_link, |
4387 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4388 | .get_sg = ethtool_op_get_sg, | |
4389 | .get_tso = ethtool_op_get_tso, | |
4390 | .get_ufo = ethtool_op_get_ufo, | |
4391 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4392 | }; |
4393 | ||
eb7cc59a | 4394 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4395 | .ndo_init = bond_init, |
9e71626c | 4396 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4397 | .ndo_open = bond_open, |
4398 | .ndo_stop = bond_close, | |
00829823 | 4399 | .ndo_start_xmit = bond_start_xmit, |
eb7cc59a SH |
4400 | .ndo_get_stats = bond_get_stats, |
4401 | .ndo_do_ioctl = bond_do_ioctl, | |
4402 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4403 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4404 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4405 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4406 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4407 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4408 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
4409 | }; | |
4410 | ||
9e2e61fb AW |
4411 | static void bond_destructor(struct net_device *bond_dev) |
4412 | { | |
4413 | struct bonding *bond = netdev_priv(bond_dev); | |
4414 | if (bond->wq) | |
4415 | destroy_workqueue(bond->wq); | |
4416 | free_netdev(bond_dev); | |
4417 | } | |
4418 | ||
181470fc | 4419 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4420 | { |
454d7c9b | 4421 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4422 | |
1da177e4 LT |
4423 | /* initialize rwlocks */ |
4424 | rwlock_init(&bond->lock); | |
4425 | rwlock_init(&bond->curr_slave_lock); | |
4426 | ||
d2991f75 | 4427 | bond->params = bonding_defaults; |
1da177e4 LT |
4428 | |
4429 | /* Initialize pointers */ | |
1da177e4 LT |
4430 | bond->dev = bond_dev; |
4431 | INIT_LIST_HEAD(&bond->vlan_list); | |
4432 | ||
4433 | /* Initialize the device entry points */ | |
181470fc | 4434 | ether_setup(bond_dev); |
eb7cc59a | 4435 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4436 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4437 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4438 | |
9e2e61fb | 4439 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4440 | |
4441 | /* Initialize the device options */ | |
4442 | bond_dev->tx_queue_len = 0; | |
4443 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4444 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4445 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4446 | ||
6cf3f41e JV |
4447 | if (bond->params.arp_interval) |
4448 | bond_dev->priv_flags |= IFF_MASTER_ARPMON; | |
1da177e4 LT |
4449 | |
4450 | /* At first, we block adding VLANs. That's the only way to | |
4451 | * prevent problems that occur when adding VLANs over an | |
4452 | * empty bond. The block will be removed once non-challenged | |
4453 | * slaves are enslaved. | |
4454 | */ | |
4455 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4456 | ||
932ff279 | 4457 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4458 | * transmitting */ |
4459 | bond_dev->features |= NETIF_F_LLTX; | |
4460 | ||
4461 | /* By default, we declare the bond to be fully | |
4462 | * VLAN hardware accelerated capable. Special | |
4463 | * care is taken in the various xmit functions | |
4464 | * when there are slaves that are not hw accel | |
4465 | * capable | |
4466 | */ | |
1da177e4 LT |
4467 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4468 | NETIF_F_HW_VLAN_RX | | |
4469 | NETIF_F_HW_VLAN_FILTER); | |
4470 | ||
1da177e4 LT |
4471 | } |
4472 | ||
fdaea7a9 JV |
4473 | static void bond_work_cancel_all(struct bonding *bond) |
4474 | { | |
4475 | write_lock_bh(&bond->lock); | |
4476 | bond->kill_timers = 1; | |
4477 | write_unlock_bh(&bond->lock); | |
4478 | ||
4479 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4480 | cancel_delayed_work(&bond->mii_work); | |
4481 | ||
4482 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4483 | cancel_delayed_work(&bond->arp_work); | |
4484 | ||
4485 | if (bond->params.mode == BOND_MODE_ALB && | |
4486 | delayed_work_pending(&bond->alb_work)) | |
4487 | cancel_delayed_work(&bond->alb_work); | |
4488 | ||
4489 | if (bond->params.mode == BOND_MODE_8023AD && | |
4490 | delayed_work_pending(&bond->ad_work)) | |
4491 | cancel_delayed_work(&bond->ad_work); | |
4492 | } | |
4493 | ||
c67dfb29 EB |
4494 | /* |
4495 | * Destroy a bonding device. | |
4496 | * Must be under rtnl_lock when this function is called. | |
4497 | */ | |
4498 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4499 | { |
454d7c9b | 4500 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f | 4501 | |
c67dfb29 EB |
4502 | /* Release the bonded slaves */ |
4503 | bond_release_all(bond_dev); | |
4504 | ||
a434e43f JV |
4505 | list_del(&bond->bond_list); |
4506 | ||
4507 | bond_work_cancel_all(bond); | |
4508 | ||
a434e43f | 4509 | bond_remove_proc_entry(bond); |
c67dfb29 | 4510 | |
22bedad3 | 4511 | __hw_addr_flush(&bond->mc_list); |
a434e43f JV |
4512 | } |
4513 | ||
1da177e4 LT |
4514 | /*------------------------- Module initialization ---------------------------*/ |
4515 | ||
4516 | /* | |
4517 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4518 | * number of the mode or its string name. A bit complicated because |
4519 | * some mode names are substrings of other names, and calls from sysfs | |
4520 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4521 | */ |
325dcf7a | 4522 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4523 | { |
54b87323 | 4524 | int modeint = -1, i, rv; |
a42e534f | 4525 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4526 | |
a42e534f JV |
4527 | for (p = (char *)buf; *p; p++) |
4528 | if (!(isdigit(*p) || isspace(*p))) | |
4529 | break; | |
4530 | ||
4531 | if (*p) | |
ece95f7f | 4532 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4533 | else |
54b87323 | 4534 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4535 | |
4536 | if (!rv) | |
4537 | return -1; | |
1da177e4 LT |
4538 | |
4539 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4540 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4541 | return tbl[i].mode; |
4542 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4543 | return tbl[i].mode; |
1da177e4 LT |
4544 | } |
4545 | ||
4546 | return -1; | |
4547 | } | |
4548 | ||
4549 | static int bond_check_params(struct bond_params *params) | |
4550 | { | |
a549952a | 4551 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4552 | |
1da177e4 LT |
4553 | /* |
4554 | * Convert string parameters. | |
4555 | */ | |
4556 | if (mode) { | |
4557 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4558 | if (bond_mode == -1) { | |
a4aee5c8 | 4559 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4560 | mode == NULL ? "NULL" : mode); |
4561 | return -EINVAL; | |
4562 | } | |
4563 | } | |
4564 | ||
169a3e66 JV |
4565 | if (xmit_hash_policy) { |
4566 | if ((bond_mode != BOND_MODE_XOR) && | |
4567 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4568 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4569 | bond_mode_name(bond_mode)); |
4570 | } else { | |
4571 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4572 | xmit_hashtype_tbl); | |
4573 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4574 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4575 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4576 | xmit_hash_policy); |
4577 | return -EINVAL; | |
4578 | } | |
4579 | } | |
4580 | } | |
4581 | ||
1da177e4 LT |
4582 | if (lacp_rate) { |
4583 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4584 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4585 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4586 | } else { |
4587 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4588 | if (lacp_fast == -1) { | |
a4aee5c8 | 4589 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4590 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4591 | return -EINVAL; | |
4592 | } | |
4593 | } | |
4594 | } | |
4595 | ||
fd989c83 JV |
4596 | if (ad_select) { |
4597 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4598 | if (params->ad_select == -1) { | |
a4aee5c8 | 4599 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4600 | ad_select == NULL ? "NULL" : ad_select); |
4601 | return -EINVAL; | |
4602 | } | |
4603 | ||
4604 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4605 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4606 | } |
4607 | } else { | |
4608 | params->ad_select = BOND_AD_STABLE; | |
4609 | } | |
4610 | ||
f5841306 | 4611 | if (max_bonds < 0) { |
a4aee5c8 JP |
4612 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4613 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4614 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4615 | } | |
4616 | ||
4617 | if (miimon < 0) { | |
a4aee5c8 JP |
4618 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4619 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4620 | miimon = BOND_LINK_MON_INTERV; |
4621 | } | |
4622 | ||
4623 | if (updelay < 0) { | |
a4aee5c8 JP |
4624 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4625 | updelay, INT_MAX); | |
1da177e4 LT |
4626 | updelay = 0; |
4627 | } | |
4628 | ||
4629 | if (downdelay < 0) { | |
a4aee5c8 JP |
4630 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4631 | downdelay, INT_MAX); | |
1da177e4 LT |
4632 | downdelay = 0; |
4633 | } | |
4634 | ||
4635 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4636 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4637 | use_carrier); | |
1da177e4 LT |
4638 | use_carrier = 1; |
4639 | } | |
4640 | ||
7893b249 | 4641 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
2381a55c | 4642 | pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 4643 | num_grat_arp); |
7893b249 MS |
4644 | num_grat_arp = 1; |
4645 | } | |
4646 | ||
305d552a | 4647 | if (num_unsol_na < 0 || num_unsol_na > 255) { |
2381a55c | 4648 | pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 4649 | num_unsol_na); |
305d552a BH |
4650 | num_unsol_na = 1; |
4651 | } | |
4652 | ||
1da177e4 LT |
4653 | /* reset values for 802.3ad */ |
4654 | if (bond_mode == BOND_MODE_8023AD) { | |
4655 | if (!miimon) { | |
a4aee5c8 | 4656 | 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 | 4657 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4658 | miimon = 100; |
4659 | } | |
4660 | } | |
4661 | ||
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; |
7893b249 | 4821 | params->num_grat_arp = num_grat_arp; |
305d552a | 4822 | params->num_unsol_na = num_unsol_na; |
1da177e4 | 4823 | params->arp_interval = arp_interval; |
f5b2b966 | 4824 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4825 | params->updelay = updelay; |
4826 | params->downdelay = downdelay; | |
4827 | params->use_carrier = use_carrier; | |
4828 | params->lacp_fast = lacp_fast; | |
4829 | params->primary[0] = 0; | |
a549952a | 4830 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4831 | params->fail_over_mac = fail_over_mac_value; |
1da177e4 LT |
4832 | |
4833 | if (primary) { | |
4834 | strncpy(params->primary, primary, IFNAMSIZ); | |
4835 | params->primary[IFNAMSIZ - 1] = 0; | |
4836 | } | |
4837 | ||
4838 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4839 | ||
4840 | return 0; | |
4841 | } | |
4842 | ||
0daa2303 | 4843 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4844 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4845 | |
e8a0464c DM |
4846 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4847 | struct netdev_queue *txq, | |
4848 | void *_unused) | |
c773e847 DM |
4849 | { |
4850 | lockdep_set_class(&txq->_xmit_lock, | |
4851 | &bonding_netdev_xmit_lock_key); | |
4852 | } | |
4853 | ||
4854 | static void bond_set_lockdep_class(struct net_device *dev) | |
4855 | { | |
cf508b12 DM |
4856 | lockdep_set_class(&dev->addr_list_lock, |
4857 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4858 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4859 | } |
4860 | ||
181470fc SH |
4861 | /* |
4862 | * Called from registration process | |
4863 | */ | |
4864 | static int bond_init(struct net_device *bond_dev) | |
4865 | { | |
4866 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4867 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
181470fc SH |
4868 | |
4869 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4870 | ||
4871 | bond->wq = create_singlethread_workqueue(bond_dev->name); | |
4872 | if (!bond->wq) | |
4873 | return -ENOMEM; | |
4874 | ||
4875 | bond_set_lockdep_class(bond_dev); | |
4876 | ||
4877 | netif_carrier_off(bond_dev); | |
4878 | ||
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 JP |
4883 | |
4884 | __hw_addr_init(&bond->mc_list); | |
181470fc SH |
4885 | return 0; |
4886 | } | |
4887 | ||
88ead977 EB |
4888 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4889 | { | |
4890 | if (tb[IFLA_ADDRESS]) { | |
4891 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4892 | return -EINVAL; | |
4893 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4894 | return -EADDRNOTAVAIL; | |
4895 | } | |
4896 | return 0; | |
4897 | } | |
4898 | ||
4899 | static struct rtnl_link_ops bond_link_ops __read_mostly = { | |
4900 | .kind = "bond", | |
6639104b | 4901 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4902 | .setup = bond_setup, |
4903 | .validate = bond_validate, | |
4904 | }; | |
4905 | ||
dfe60397 | 4906 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4907 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4908 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4909 | * set up our sysfs entries. | |
4910 | */ | |
ec87fd3b | 4911 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4912 | { |
4913 | struct net_device *bond_dev; | |
4914 | int res; | |
4915 | ||
4916 | rtnl_lock(); | |
027ea041 | 4917 | |
e4b91c48 | 4918 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
181470fc | 4919 | bond_setup); |
dfe60397 | 4920 | if (!bond_dev) { |
a4aee5c8 | 4921 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4922 | rtnl_unlock(); |
4923 | return -ENOMEM; | |
dfe60397 MW |
4924 | } |
4925 | ||
ec87fd3b | 4926 | dev_net_set(bond_dev, net); |
88ead977 EB |
4927 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4928 | ||
e4b91c48 JV |
4929 | if (!name) { |
4930 | res = dev_alloc_name(bond_dev, "bond%d"); | |
4931 | if (res < 0) | |
9e2e61fb | 4932 | goto out; |
e4b91c48 JV |
4933 | } |
4934 | ||
dfe60397 | 4935 | res = register_netdevice(bond_dev); |
0daa2303 | 4936 | |
30c15ba9 | 4937 | out: |
7e083840 | 4938 | rtnl_unlock(); |
9e2e61fb AW |
4939 | if (res < 0) |
4940 | bond_destructor(bond_dev); | |
30c15ba9 | 4941 | return res; |
dfe60397 MW |
4942 | } |
4943 | ||
2c8c1e72 | 4944 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4945 | { |
15449745 | 4946 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4947 | |
4948 | bn->net = net; | |
4949 | INIT_LIST_HEAD(&bn->dev_list); | |
4950 | ||
ec87fd3b | 4951 | bond_create_proc_dir(bn); |
15449745 EB |
4952 | |
4953 | return 0; | |
ec87fd3b EB |
4954 | } |
4955 | ||
2c8c1e72 | 4956 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4957 | { |
15449745 | 4958 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4959 | |
4960 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
4961 | } |
4962 | ||
4963 | static struct pernet_operations bond_net_ops = { | |
4964 | .init = bond_net_init, | |
4965 | .exit = bond_net_exit, | |
15449745 EB |
4966 | .id = &bond_net_id, |
4967 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4968 | }; |
4969 | ||
1da177e4 LT |
4970 | static int __init bonding_init(void) |
4971 | { | |
1da177e4 LT |
4972 | int i; |
4973 | int res; | |
4974 | ||
3d632c3f | 4975 | pr_info("%s", version); |
1da177e4 | 4976 | |
dfe60397 | 4977 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4978 | if (res) |
dfe60397 | 4979 | goto out; |
1da177e4 | 4980 | |
15449745 | 4981 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4982 | if (res) |
4983 | goto out; | |
027ea041 | 4984 | |
88ead977 EB |
4985 | res = rtnl_link_register(&bond_link_ops); |
4986 | if (res) | |
6639104b | 4987 | goto err_link; |
88ead977 | 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); |
305d552a | 5001 | bond_register_ipv6_notifier(); |
dfe60397 | 5002 | out: |
1da177e4 | 5003 | return res; |
88ead977 EB |
5004 | err: |
5005 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 5006 | err_link: |
15449745 | 5007 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 5008 | goto out; |
dfe60397 | 5009 | |
1da177e4 LT |
5010 | } |
5011 | ||
5012 | static void __exit bonding_exit(void) | |
5013 | { | |
5014 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5015 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5016 | bond_unregister_ipv6_notifier(); |
1da177e4 | 5017 | |
ae68c398 PE |
5018 | bond_destroy_sysfs(); |
5019 | ||
88ead977 | 5020 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 5021 | unregister_pernet_subsys(&bond_net_ops); |
1da177e4 LT |
5022 | } |
5023 | ||
5024 | module_init(bonding_init); | |
5025 | module_exit(bonding_exit); | |
5026 | MODULE_LICENSE("GPL"); | |
5027 | MODULE_VERSION(DRV_VERSION); | |
5028 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5029 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5030 | MODULE_ALIAS_RTNL_LINK("bond"); |