Commit | Line | Data |
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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> | |
f6dc31a8 | 62 | #include <linux/netpoll.h> |
1da177e4 | 63 | #include <linux/inetdevice.h> |
a816c7c7 | 64 | #include <linux/igmp.h> |
1da177e4 LT |
65 | #include <linux/etherdevice.h> |
66 | #include <linux/skbuff.h> | |
67 | #include <net/sock.h> | |
68 | #include <linux/rtnetlink.h> | |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
71 | #include <linux/smp.h> | |
72 | #include <linux/if_ether.h> | |
73 | #include <net/arp.h> | |
74 | #include <linux/mii.h> | |
75 | #include <linux/ethtool.h> | |
76 | #include <linux/if_vlan.h> | |
77 | #include <linux/if_bonding.h> | |
b63bb739 | 78 | #include <linux/jiffies.h> |
c3ade5ca | 79 | #include <net/route.h> |
457c4cbc | 80 | #include <net/net_namespace.h> |
ec87fd3b | 81 | #include <net/netns/generic.h> |
1da177e4 LT |
82 | #include "bonding.h" |
83 | #include "bond_3ad.h" | |
84 | #include "bond_alb.h" | |
85 | ||
86 | /*---------------------------- Module parameters ----------------------------*/ | |
87 | ||
88 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
89 | #define BOND_LINK_MON_INTERV 0 | |
90 | #define BOND_LINK_ARP_INTERV 0 | |
91 | ||
92 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
7893b249 | 93 | static int num_grat_arp = 1; |
305d552a | 94 | static int num_unsol_na = 1; |
1da177e4 | 95 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
96 | static int updelay; |
97 | static int downdelay; | |
1da177e4 | 98 | static int use_carrier = 1; |
3d632c3f SH |
99 | static char *mode; |
100 | static char *primary; | |
a549952a | 101 | static char *primary_reselect; |
3d632c3f SH |
102 | static char *lacp_rate; |
103 | static char *ad_select; | |
104 | static char *xmit_hash_policy; | |
1da177e4 | 105 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
106 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
107 | static char *arp_validate; | |
108 | static char *fail_over_mac; | |
d2991f75 | 109 | static struct bond_params bonding_defaults; |
1da177e4 LT |
110 | |
111 | module_param(max_bonds, int, 0); | |
112 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
7893b249 MS |
113 | module_param(num_grat_arp, int, 0644); |
114 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
305d552a BH |
115 | module_param(num_unsol_na, int, 0644); |
116 | MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event"); | |
1da177e4 LT |
117 | module_param(miimon, int, 0); |
118 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
119 | module_param(updelay, int, 0); | |
120 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
121 | module_param(downdelay, int, 0); | |
2ac47660 MW |
122 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
123 | "in milliseconds"); | |
1da177e4 | 124 | module_param(use_carrier, int, 0); |
2ac47660 MW |
125 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
126 | "0 for off, 1 for on (default)"); | |
1da177e4 | 127 | module_param(mode, charp, 0); |
2ac47660 MW |
128 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
129 | "1 for active-backup, 2 for balance-xor, " | |
130 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
131 | "6 for balance-alb"); | |
1da177e4 LT |
132 | module_param(primary, charp, 0); |
133 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
134 | module_param(primary_reselect, charp, 0); |
135 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
136 | "once it comes up; " | |
137 | "0 for always (default), " | |
138 | "1 for only if speed of primary is " | |
139 | "better, " | |
140 | "2 for only on active slave " | |
141 | "failure"); | |
1da177e4 | 142 | module_param(lacp_rate, charp, 0); |
2ac47660 MW |
143 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
144 | "(slow/fast)"); | |
fd989c83 JV |
145 | module_param(ad_select, charp, 0); |
146 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 147 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
148 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
149 | ", 1 for layer 3+4"); | |
1da177e4 LT |
150 | module_param(arp_interval, int, 0); |
151 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
152 | module_param_array(arp_ip_target, charp, NULL, 0); | |
153 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
154 | module_param(arp_validate, charp, 0); |
155 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
156 | module_param(fail_over_mac, charp, 0); |
157 | 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 |
158 | |
159 | /*----------------------------- Global variables ----------------------------*/ | |
160 | ||
f71e1309 | 161 | static const char * const version = |
1da177e4 LT |
162 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
163 | ||
f99189b1 | 164 | int bond_net_id __read_mostly; |
1da177e4 | 165 | |
3d632c3f SH |
166 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
167 | static int arp_ip_count; | |
1da177e4 | 168 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
169 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
170 | static int lacp_fast; | |
217df670 | 171 | |
1da177e4 | 172 | |
e97fd7c6 | 173 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
174 | { "slow", AD_LACP_SLOW}, |
175 | { "fast", AD_LACP_FAST}, | |
176 | { NULL, -1}, | |
177 | }; | |
178 | ||
e97fd7c6 | 179 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
180 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
181 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
182 | { "balance-xor", BOND_MODE_XOR}, | |
183 | { "broadcast", BOND_MODE_BROADCAST}, | |
184 | { "802.3ad", BOND_MODE_8023AD}, | |
185 | { "balance-tlb", BOND_MODE_TLB}, | |
186 | { "balance-alb", BOND_MODE_ALB}, | |
187 | { NULL, -1}, | |
188 | }; | |
189 | ||
e97fd7c6 | 190 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
191 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
192 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 193 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
194 | { NULL, -1}, |
195 | }; | |
196 | ||
e97fd7c6 | 197 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
198 | { "none", BOND_ARP_VALIDATE_NONE}, |
199 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
200 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
201 | { "all", BOND_ARP_VALIDATE_ALL}, | |
202 | { NULL, -1}, | |
203 | }; | |
204 | ||
e97fd7c6 | 205 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
206 | { "none", BOND_FOM_NONE}, |
207 | { "active", BOND_FOM_ACTIVE}, | |
208 | { "follow", BOND_FOM_FOLLOW}, | |
209 | { NULL, -1}, | |
210 | }; | |
211 | ||
a549952a JP |
212 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
213 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
214 | { "better", BOND_PRI_RESELECT_BETTER}, | |
215 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
216 | { NULL, -1}, | |
217 | }; | |
218 | ||
fd989c83 JV |
219 | struct bond_parm_tbl ad_select_tbl[] = { |
220 | { "stable", BOND_AD_STABLE}, | |
221 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
222 | { "count", BOND_AD_COUNT}, | |
223 | { NULL, -1}, | |
224 | }; | |
225 | ||
1da177e4 LT |
226 | /*-------------------------- Forward declarations ---------------------------*/ |
227 | ||
c3ade5ca | 228 | static void bond_send_gratuitous_arp(struct bonding *bond); |
181470fc | 229 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 230 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
231 | |
232 | /*---------------------------- General routines -----------------------------*/ | |
233 | ||
4ad072c9 | 234 | static const char *bond_mode_name(int mode) |
1da177e4 | 235 | { |
77afc92b HE |
236 | static const char *names[] = { |
237 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
238 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
239 | [BOND_MODE_XOR] = "load balancing (xor)", | |
240 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 241 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
242 | [BOND_MODE_TLB] = "transmit load balancing", |
243 | [BOND_MODE_ALB] = "adaptive load balancing", | |
244 | }; | |
245 | ||
246 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 247 | return "unknown"; |
77afc92b HE |
248 | |
249 | return names[mode]; | |
1da177e4 LT |
250 | } |
251 | ||
252 | /*---------------------------------- VLAN -----------------------------------*/ | |
253 | ||
254 | /** | |
255 | * bond_add_vlan - add a new vlan id on bond | |
256 | * @bond: bond that got the notification | |
257 | * @vlan_id: the vlan id to add | |
258 | * | |
259 | * Returns -ENOMEM if allocation failed. | |
260 | */ | |
261 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
262 | { | |
263 | struct vlan_entry *vlan; | |
264 | ||
5a03cdb7 | 265 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 266 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 267 | |
305d552a | 268 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 269 | if (!vlan) |
1da177e4 | 270 | return -ENOMEM; |
1da177e4 LT |
271 | |
272 | INIT_LIST_HEAD(&vlan->vlan_list); | |
273 | vlan->vlan_id = vlan_id; | |
274 | ||
275 | write_lock_bh(&bond->lock); | |
276 | ||
277 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
278 | ||
279 | write_unlock_bh(&bond->lock); | |
280 | ||
5a03cdb7 | 281 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
282 | |
283 | return 0; | |
284 | } | |
285 | ||
286 | /** | |
287 | * bond_del_vlan - delete a vlan id from bond | |
288 | * @bond: bond that got the notification | |
289 | * @vlan_id: the vlan id to delete | |
290 | * | |
291 | * returns -ENODEV if @vlan_id was not found in @bond. | |
292 | */ | |
293 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
294 | { | |
0883beca | 295 | struct vlan_entry *vlan; |
1da177e4 LT |
296 | int res = -ENODEV; |
297 | ||
5a03cdb7 | 298 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 LT |
299 | |
300 | write_lock_bh(&bond->lock); | |
301 | ||
0883beca | 302 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
303 | if (vlan->vlan_id == vlan_id) { |
304 | list_del(&vlan->vlan_list); | |
305 | ||
58402054 | 306 | if (bond_is_lb(bond)) |
1da177e4 | 307 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 308 | |
a4aee5c8 JP |
309 | pr_debug("removed VLAN ID %d from bond %s\n", |
310 | vlan_id, bond->dev->name); | |
1da177e4 LT |
311 | |
312 | kfree(vlan); | |
313 | ||
314 | if (list_empty(&bond->vlan_list) && | |
315 | (bond->slave_cnt == 0)) { | |
316 | /* Last VLAN removed and no slaves, so | |
317 | * restore block on adding VLANs. This will | |
318 | * be removed once new slaves that are not | |
319 | * VLAN challenged will be added. | |
320 | */ | |
321 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
322 | } | |
323 | ||
324 | res = 0; | |
325 | goto out; | |
326 | } | |
327 | } | |
328 | ||
a4aee5c8 JP |
329 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
330 | vlan_id, bond->dev->name); | |
1da177e4 LT |
331 | |
332 | out: | |
333 | write_unlock_bh(&bond->lock); | |
334 | return res; | |
335 | } | |
336 | ||
337 | /** | |
338 | * bond_has_challenged_slaves | |
339 | * @bond: the bond we're working on | |
340 | * | |
341 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
342 | * was found, 0 otherwise. | |
343 | * | |
344 | * Assumes bond->lock is held. | |
345 | */ | |
346 | static int bond_has_challenged_slaves(struct bonding *bond) | |
347 | { | |
348 | struct slave *slave; | |
349 | int i; | |
350 | ||
351 | bond_for_each_slave(bond, slave, i) { | |
352 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 353 | pr_debug("found VLAN challenged slave - %s\n", |
a4aee5c8 | 354 | slave->dev->name); |
1da177e4 LT |
355 | return 1; |
356 | } | |
357 | } | |
358 | ||
5a03cdb7 | 359 | pr_debug("no VLAN challenged slaves found\n"); |
1da177e4 LT |
360 | return 0; |
361 | } | |
362 | ||
363 | /** | |
364 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
365 | * @bond: the bond we're working on | |
366 | * @curr: item we're advancing from | |
367 | * | |
368 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
369 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 370 | * |
1da177e4 LT |
371 | * Caller must hold bond->lock |
372 | */ | |
373 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
374 | { | |
375 | struct vlan_entry *next, *last; | |
376 | ||
3d632c3f | 377 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 378 | return NULL; |
1da177e4 LT |
379 | |
380 | if (!curr) { | |
381 | next = list_entry(bond->vlan_list.next, | |
382 | struct vlan_entry, vlan_list); | |
383 | } else { | |
384 | last = list_entry(bond->vlan_list.prev, | |
385 | struct vlan_entry, vlan_list); | |
386 | if (last == curr) { | |
387 | next = list_entry(bond->vlan_list.next, | |
388 | struct vlan_entry, vlan_list); | |
389 | } else { | |
390 | next = list_entry(curr->vlan_list.next, | |
391 | struct vlan_entry, vlan_list); | |
392 | } | |
393 | } | |
394 | ||
395 | return next; | |
396 | } | |
397 | ||
398 | /** | |
399 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 400 | * |
1da177e4 LT |
401 | * @bond: bond device that got this skb for tx. |
402 | * @skb: hw accel VLAN tagged skb to transmit | |
403 | * @slave_dev: slave that is supposed to xmit this skbuff | |
3d632c3f | 404 | * |
1da177e4 LT |
405 | * When the bond gets an skb to transmit that is |
406 | * already hardware accelerated VLAN tagged, and it | |
407 | * needs to relay this skb to a slave that is not | |
408 | * hw accel capable, the skb needs to be "unaccelerated", | |
409 | * i.e. strip the hwaccel tag and re-insert it as part | |
410 | * of the payload. | |
411 | */ | |
3d632c3f SH |
412 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
413 | struct net_device *slave_dev) | |
1da177e4 | 414 | { |
966bc6f4 | 415 | unsigned short uninitialized_var(vlan_id); |
1da177e4 LT |
416 | |
417 | if (!list_empty(&bond->vlan_list) && | |
418 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
419 | vlan_get_tag(skb, &vlan_id) == 0) { | |
420 | skb->dev = slave_dev; | |
421 | skb = vlan_put_tag(skb, vlan_id); | |
422 | if (!skb) { | |
423 | /* vlan_put_tag() frees the skb in case of error, | |
424 | * so return success here so the calling functions | |
425 | * won't attempt to free is again. | |
426 | */ | |
427 | return 0; | |
428 | } | |
429 | } else { | |
430 | skb->dev = slave_dev; | |
431 | } | |
432 | ||
433 | skb->priority = 1; | |
f6dc31a8 WC |
434 | #ifdef CONFIG_NET_POLL_CONTROLLER |
435 | if (unlikely(bond->dev->priv_flags & IFF_IN_NETPOLL)) { | |
436 | struct netpoll *np = bond->dev->npinfo->netpoll; | |
437 | slave_dev->npinfo = bond->dev->npinfo; | |
438 | np->real_dev = np->dev = skb->dev; | |
439 | slave_dev->priv_flags |= IFF_IN_NETPOLL; | |
440 | netpoll_send_skb(np, skb); | |
441 | slave_dev->priv_flags &= ~IFF_IN_NETPOLL; | |
442 | np->dev = bond->dev; | |
443 | } else | |
444 | #endif | |
445 | dev_queue_xmit(skb); | |
1da177e4 LT |
446 | |
447 | return 0; | |
448 | } | |
449 | ||
450 | /* | |
451 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
452 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
453 | * lock because: | |
454 | * a. This operation is performed in IOCTL context, | |
455 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
456 | * c. Holding a lock with BH disabled while directly calling a base driver | |
457 | * entry point is generally a BAD idea. | |
3d632c3f | 458 | * |
1da177e4 LT |
459 | * The design of synchronization/protection for this operation in the 8021q |
460 | * module is good for one or more VLAN devices over a single physical device | |
461 | * and cannot be extended for a teaming solution like bonding, so there is a | |
462 | * potential race condition here where a net device from the vlan group might | |
463 | * be referenced (either by a base driver or the 8021q code) while it is being | |
464 | * removed from the system. However, it turns out we're not making matters | |
465 | * worse, and if it works for regular VLAN usage it will work here too. | |
466 | */ | |
467 | ||
468 | /** | |
469 | * bond_vlan_rx_register - Propagates registration to slaves | |
470 | * @bond_dev: bonding net device that got called | |
471 | * @grp: vlan group being registered | |
472 | */ | |
3d632c3f SH |
473 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
474 | struct vlan_group *grp) | |
1da177e4 | 475 | { |
454d7c9b | 476 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
477 | struct slave *slave; |
478 | int i; | |
479 | ||
480 | bond->vlgrp = grp; | |
481 | ||
482 | bond_for_each_slave(bond, slave, i) { | |
483 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 484 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
485 | |
486 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
487 | slave_ops->ndo_vlan_rx_register) { |
488 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
489 | } |
490 | } | |
491 | } | |
492 | ||
493 | /** | |
494 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
495 | * @bond_dev: bonding net device that got called | |
496 | * @vid: vlan id being added | |
497 | */ | |
498 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
499 | { | |
454d7c9b | 500 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
501 | struct slave *slave; |
502 | int i, res; | |
503 | ||
504 | bond_for_each_slave(bond, slave, i) { | |
505 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 506 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
507 | |
508 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
509 | slave_ops->ndo_vlan_rx_add_vid) { |
510 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
511 | } |
512 | } | |
513 | ||
514 | res = bond_add_vlan(bond, vid); | |
515 | if (res) { | |
a4aee5c8 | 516 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
517 | bond_dev->name, vid); |
518 | } | |
519 | } | |
520 | ||
521 | /** | |
522 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
523 | * @bond_dev: bonding net device that got called | |
524 | * @vid: vlan id being removed | |
525 | */ | |
526 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
527 | { | |
454d7c9b | 528 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
529 | struct slave *slave; |
530 | struct net_device *vlan_dev; | |
531 | int i, res; | |
532 | ||
533 | bond_for_each_slave(bond, slave, i) { | |
534 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 535 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
536 | |
537 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 538 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
539 | /* Save and then restore vlan_dev in the grp array, |
540 | * since the slave's driver might clear it. | |
541 | */ | |
5c15bdec | 542 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 543 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 544 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
545 | } |
546 | } | |
547 | ||
548 | res = bond_del_vlan(bond, vid); | |
549 | if (res) { | |
a4aee5c8 | 550 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
551 | bond_dev->name, vid); |
552 | } | |
553 | } | |
554 | ||
555 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
556 | { | |
557 | struct vlan_entry *vlan; | |
eb7cc59a | 558 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
559 | |
560 | write_lock_bh(&bond->lock); | |
561 | ||
eb7cc59a | 562 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 563 | goto out; |
1da177e4 LT |
564 | |
565 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
566 | slave_ops->ndo_vlan_rx_register) |
567 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
568 | |
569 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 570 | !(slave_ops->ndo_vlan_rx_add_vid)) |
1da177e4 | 571 | goto out; |
1da177e4 | 572 | |
eb7cc59a SH |
573 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
574 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
575 | |
576 | out: | |
577 | write_unlock_bh(&bond->lock); | |
578 | } | |
579 | ||
3d632c3f SH |
580 | static void bond_del_vlans_from_slave(struct bonding *bond, |
581 | struct net_device *slave_dev) | |
1da177e4 | 582 | { |
eb7cc59a | 583 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
584 | struct vlan_entry *vlan; |
585 | struct net_device *vlan_dev; | |
586 | ||
587 | write_lock_bh(&bond->lock); | |
588 | ||
eb7cc59a | 589 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 590 | goto out; |
1da177e4 LT |
591 | |
592 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 593 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 594 | goto unreg; |
1da177e4 LT |
595 | |
596 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
597 | /* Save and then restore vlan_dev in the grp array, | |
598 | * since the slave's driver might clear it. | |
599 | */ | |
5c15bdec | 600 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 601 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 602 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
603 | } |
604 | ||
605 | unreg: | |
606 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
607 | slave_ops->ndo_vlan_rx_register) |
608 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
609 | |
610 | out: | |
611 | write_unlock_bh(&bond->lock); | |
612 | } | |
613 | ||
614 | /*------------------------------- Link status -------------------------------*/ | |
615 | ||
ff59c456 JV |
616 | /* |
617 | * Set the carrier state for the master according to the state of its | |
618 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
619 | * do special 802.3ad magic. | |
620 | * | |
621 | * Returns zero if carrier state does not change, nonzero if it does. | |
622 | */ | |
623 | static int bond_set_carrier(struct bonding *bond) | |
624 | { | |
625 | struct slave *slave; | |
626 | int i; | |
627 | ||
628 | if (bond->slave_cnt == 0) | |
629 | goto down; | |
630 | ||
631 | if (bond->params.mode == BOND_MODE_8023AD) | |
632 | return bond_3ad_set_carrier(bond); | |
633 | ||
634 | bond_for_each_slave(bond, slave, i) { | |
635 | if (slave->link == BOND_LINK_UP) { | |
636 | if (!netif_carrier_ok(bond->dev)) { | |
637 | netif_carrier_on(bond->dev); | |
638 | return 1; | |
639 | } | |
640 | return 0; | |
641 | } | |
642 | } | |
643 | ||
644 | down: | |
645 | if (netif_carrier_ok(bond->dev)) { | |
646 | netif_carrier_off(bond->dev); | |
647 | return 1; | |
648 | } | |
649 | return 0; | |
650 | } | |
651 | ||
1da177e4 LT |
652 | /* |
653 | * Get link speed and duplex from the slave's base driver | |
654 | * using ethtool. If for some reason the call fails or the | |
655 | * values are invalid, fake speed and duplex to 100/Full | |
656 | * and return error. | |
657 | */ | |
658 | static int bond_update_speed_duplex(struct slave *slave) | |
659 | { | |
660 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 661 | struct ethtool_cmd etool; |
61a44b9c | 662 | int res; |
1da177e4 LT |
663 | |
664 | /* Fake speed and duplex */ | |
665 | slave->speed = SPEED_100; | |
666 | slave->duplex = DUPLEX_FULL; | |
667 | ||
61a44b9c MW |
668 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
669 | return -1; | |
1da177e4 | 670 | |
61a44b9c MW |
671 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
672 | if (res < 0) | |
1da177e4 | 673 | return -1; |
1da177e4 | 674 | |
1da177e4 LT |
675 | switch (etool.speed) { |
676 | case SPEED_10: | |
677 | case SPEED_100: | |
678 | case SPEED_1000: | |
94dbffd5 | 679 | case SPEED_10000: |
1da177e4 LT |
680 | break; |
681 | default: | |
682 | return -1; | |
683 | } | |
684 | ||
685 | switch (etool.duplex) { | |
686 | case DUPLEX_FULL: | |
687 | case DUPLEX_HALF: | |
688 | break; | |
689 | default: | |
690 | return -1; | |
691 | } | |
692 | ||
693 | slave->speed = etool.speed; | |
694 | slave->duplex = etool.duplex; | |
695 | ||
696 | return 0; | |
697 | } | |
698 | ||
699 | /* | |
700 | * if <dev> supports MII link status reporting, check its link status. | |
701 | * | |
702 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 703 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
704 | * |
705 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
706 | * can't tell and just pretend it is), or 0, meaning that the link is | |
707 | * down. | |
708 | * | |
709 | * If reporting is non-zero, instead of faking link up, return -1 if | |
710 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
711 | * support them). If use_carrier is set, return whatever it says. | |
712 | * It'd be nice if there was a good way to tell if a driver supports | |
713 | * netif_carrier, but there really isn't. | |
714 | */ | |
3d632c3f SH |
715 | static int bond_check_dev_link(struct bonding *bond, |
716 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 717 | { |
eb7cc59a | 718 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 719 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
720 | struct ifreq ifr; |
721 | struct mii_ioctl_data *mii; | |
1da177e4 | 722 | |
6c988853 PG |
723 | if (!reporting && !netif_running(slave_dev)) |
724 | return 0; | |
725 | ||
eb7cc59a | 726 | if (bond->params.use_carrier) |
1da177e4 | 727 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 728 | |
29112f4e JP |
729 | /* Try to get link status using Ethtool first. */ |
730 | if (slave_dev->ethtool_ops) { | |
731 | if (slave_dev->ethtool_ops->get_link) { | |
732 | u32 link; | |
733 | ||
734 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
735 | ||
736 | return link ? BMSR_LSTATUS : 0; | |
737 | } | |
738 | } | |
739 | ||
3d632c3f | 740 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 741 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
742 | if (ioctl) { |
743 | /* TODO: set pointer to correct ioctl on a per team member */ | |
744 | /* bases to make this more efficient. that is, once */ | |
745 | /* we determine the correct ioctl, we will always */ | |
746 | /* call it and not the others for that team */ | |
747 | /* member. */ | |
748 | ||
749 | /* | |
750 | * We cannot assume that SIOCGMIIPHY will also read a | |
751 | * register; not all network drivers (e.g., e100) | |
752 | * support that. | |
753 | */ | |
754 | ||
755 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
756 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
757 | mii = if_mii(&ifr); | |
758 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
759 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
760 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
761 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
762 | } |
763 | } | |
764 | ||
1da177e4 LT |
765 | /* |
766 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 767 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
768 | * cannot report link status). If not reporting, pretend |
769 | * we're ok. | |
770 | */ | |
3d632c3f | 771 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
772 | } |
773 | ||
774 | /*----------------------------- Multicast list ------------------------------*/ | |
775 | ||
1da177e4 LT |
776 | /* |
777 | * Push the promiscuity flag down to appropriate slaves | |
778 | */ | |
7e1a1ac1 | 779 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 780 | { |
7e1a1ac1 | 781 | int err = 0; |
1da177e4 LT |
782 | if (USES_PRIMARY(bond->params.mode)) { |
783 | /* write lock already acquired */ | |
784 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
785 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
786 | inc); | |
1da177e4 LT |
787 | } |
788 | } else { | |
789 | struct slave *slave; | |
790 | int i; | |
791 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
792 | err = dev_set_promiscuity(slave->dev, inc); |
793 | if (err) | |
794 | return err; | |
1da177e4 LT |
795 | } |
796 | } | |
7e1a1ac1 | 797 | return err; |
1da177e4 LT |
798 | } |
799 | ||
800 | /* | |
801 | * Push the allmulti flag down to all slaves | |
802 | */ | |
7e1a1ac1 | 803 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 804 | { |
7e1a1ac1 | 805 | int err = 0; |
1da177e4 LT |
806 | if (USES_PRIMARY(bond->params.mode)) { |
807 | /* write lock already acquired */ | |
808 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
809 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
810 | inc); | |
1da177e4 LT |
811 | } |
812 | } else { | |
813 | struct slave *slave; | |
814 | int i; | |
815 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
816 | err = dev_set_allmulti(slave->dev, inc); |
817 | if (err) | |
818 | return err; | |
1da177e4 LT |
819 | } |
820 | } | |
7e1a1ac1 | 821 | return err; |
1da177e4 LT |
822 | } |
823 | ||
824 | /* | |
825 | * Add a Multicast address to slaves | |
826 | * according to mode | |
827 | */ | |
22bedad3 | 828 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
829 | { |
830 | if (USES_PRIMARY(bond->params.mode)) { | |
831 | /* write lock already acquired */ | |
3d632c3f | 832 | if (bond->curr_active_slave) |
22bedad3 | 833 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
834 | } else { |
835 | struct slave *slave; | |
836 | int i; | |
3d632c3f SH |
837 | |
838 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 839 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
840 | } |
841 | } | |
842 | ||
843 | /* | |
844 | * Remove a multicast address from slave | |
845 | * according to mode | |
846 | */ | |
22bedad3 | 847 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
848 | { |
849 | if (USES_PRIMARY(bond->params.mode)) { | |
850 | /* write lock already acquired */ | |
3d632c3f | 851 | if (bond->curr_active_slave) |
22bedad3 | 852 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
853 | } else { |
854 | struct slave *slave; | |
855 | int i; | |
856 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 857 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
858 | } |
859 | } | |
860 | } | |
861 | ||
a816c7c7 JV |
862 | |
863 | /* | |
864 | * Retrieve the list of registered multicast addresses for the bonding | |
865 | * device and retransmit an IGMP JOIN request to the current active | |
866 | * slave. | |
867 | */ | |
868 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
869 | { | |
870 | struct in_device *in_dev; | |
871 | struct ip_mc_list *im; | |
872 | ||
873 | rcu_read_lock(); | |
874 | in_dev = __in_dev_get_rcu(bond->dev); | |
875 | if (in_dev) { | |
3d632c3f | 876 | for (im = in_dev->mc_list; im; im = im->next) |
a816c7c7 | 877 | ip_mc_rejoin_group(im); |
a816c7c7 JV |
878 | } |
879 | ||
880 | rcu_read_unlock(); | |
881 | } | |
882 | ||
1da177e4 LT |
883 | /* |
884 | * flush all members of flush->mc_list from device dev->mc_list | |
885 | */ | |
3d632c3f SH |
886 | static void bond_mc_list_flush(struct net_device *bond_dev, |
887 | struct net_device *slave_dev) | |
1da177e4 | 888 | { |
454d7c9b | 889 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 890 | struct netdev_hw_addr *ha; |
1da177e4 | 891 | |
22bedad3 JP |
892 | netdev_for_each_mc_addr(ha, bond_dev) |
893 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
894 | |
895 | if (bond->params.mode == BOND_MODE_8023AD) { | |
896 | /* del lacpdu mc addr from mc list */ | |
897 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
898 | ||
22bedad3 | 899 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
900 | } |
901 | } | |
902 | ||
903 | /*--------------------------- Active slave change ---------------------------*/ | |
904 | ||
905 | /* | |
906 | * Update the mc list and multicast-related flags for the new and | |
907 | * old active slaves (if any) according to the multicast mode, and | |
908 | * promiscuous flags unconditionally. | |
909 | */ | |
3d632c3f SH |
910 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
911 | struct slave *old_active) | |
1da177e4 | 912 | { |
22bedad3 | 913 | struct netdev_hw_addr *ha; |
1da177e4 | 914 | |
3d632c3f | 915 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
916 | /* nothing to do - mc list is already up-to-date on |
917 | * all slaves | |
918 | */ | |
919 | return; | |
1da177e4 LT |
920 | |
921 | if (old_active) { | |
3d632c3f | 922 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 923 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 924 | |
3d632c3f | 925 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 926 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 927 | |
22bedad3 JP |
928 | netdev_for_each_mc_addr(ha, bond->dev) |
929 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
930 | } |
931 | ||
932 | if (new_active) { | |
7e1a1ac1 | 933 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 934 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 935 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 936 | |
3d632c3f | 937 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 938 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 939 | |
22bedad3 JP |
940 | netdev_for_each_mc_addr(ha, bond->dev) |
941 | dev_mc_add(new_active->dev, ha->addr); | |
a816c7c7 | 942 | bond_resend_igmp_join_requests(bond); |
1da177e4 LT |
943 | } |
944 | } | |
945 | ||
3915c1e8 JV |
946 | /* |
947 | * bond_do_fail_over_mac | |
948 | * | |
949 | * Perform special MAC address swapping for fail_over_mac settings | |
950 | * | |
951 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
952 | */ | |
953 | static void bond_do_fail_over_mac(struct bonding *bond, | |
954 | struct slave *new_active, | |
955 | struct slave *old_active) | |
1f78d9f9 HE |
956 | __releases(&bond->curr_slave_lock) |
957 | __releases(&bond->lock) | |
958 | __acquires(&bond->lock) | |
959 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
960 | { |
961 | u8 tmp_mac[ETH_ALEN]; | |
962 | struct sockaddr saddr; | |
963 | int rv; | |
964 | ||
965 | switch (bond->params.fail_over_mac) { | |
966 | case BOND_FOM_ACTIVE: | |
967 | if (new_active) | |
968 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
969 | new_active->dev->addr_len); | |
970 | break; | |
971 | case BOND_FOM_FOLLOW: | |
972 | /* | |
973 | * if new_active && old_active, swap them | |
974 | * if just old_active, do nothing (going to no active slave) | |
975 | * if just new_active, set new_active to bond's MAC | |
976 | */ | |
977 | if (!new_active) | |
978 | return; | |
979 | ||
980 | write_unlock_bh(&bond->curr_slave_lock); | |
981 | read_unlock(&bond->lock); | |
982 | ||
983 | if (old_active) { | |
984 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
985 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
986 | ETH_ALEN); | |
987 | saddr.sa_family = new_active->dev->type; | |
988 | } else { | |
989 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
990 | saddr.sa_family = bond->dev->type; | |
991 | } | |
992 | ||
993 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
994 | if (rv) { | |
a4aee5c8 | 995 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
996 | bond->dev->name, -rv, new_active->dev->name); |
997 | goto out; | |
998 | } | |
999 | ||
1000 | if (!old_active) | |
1001 | goto out; | |
1002 | ||
1003 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1004 | saddr.sa_family = old_active->dev->type; | |
1005 | ||
1006 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1007 | if (rv) | |
a4aee5c8 | 1008 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
1009 | bond->dev->name, -rv, new_active->dev->name); |
1010 | out: | |
1011 | read_lock(&bond->lock); | |
1012 | write_lock_bh(&bond->curr_slave_lock); | |
1013 | break; | |
1014 | default: | |
a4aee5c8 | 1015 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
1016 | bond->dev->name, bond->params.fail_over_mac); |
1017 | break; | |
1018 | } | |
1019 | ||
1020 | } | |
1021 | ||
a549952a JP |
1022 | static bool bond_should_change_active(struct bonding *bond) |
1023 | { | |
1024 | struct slave *prim = bond->primary_slave; | |
1025 | struct slave *curr = bond->curr_active_slave; | |
1026 | ||
1027 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
1028 | return true; | |
1029 | if (bond->force_primary) { | |
1030 | bond->force_primary = false; | |
1031 | return true; | |
1032 | } | |
1033 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
1034 | (prim->speed < curr->speed || | |
1035 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
1036 | return false; | |
1037 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
1038 | return false; | |
1039 | return true; | |
1040 | } | |
3915c1e8 | 1041 | |
1da177e4 LT |
1042 | /** |
1043 | * find_best_interface - select the best available slave to be the active one | |
1044 | * @bond: our bonding struct | |
1045 | * | |
1046 | * Warning: Caller must hold curr_slave_lock for writing. | |
1047 | */ | |
1048 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1049 | { | |
1050 | struct slave *new_active, *old_active; | |
1051 | struct slave *bestslave = NULL; | |
1052 | int mintime = bond->params.updelay; | |
1053 | int i; | |
1054 | ||
49b4ad92 | 1055 | new_active = bond->curr_active_slave; |
1da177e4 LT |
1056 | |
1057 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1058 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1059 | new_active = bond->first_slave; |
3d632c3f | 1060 | else |
1da177e4 | 1061 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1062 | } |
1063 | ||
1da177e4 | 1064 | if ((bond->primary_slave) && |
a549952a JP |
1065 | bond->primary_slave->link == BOND_LINK_UP && |
1066 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1067 | new_active = bond->primary_slave; |
1068 | } | |
1069 | ||
1070 | /* remember where to stop iterating over the slaves */ | |
1071 | old_active = new_active; | |
1072 | ||
1073 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1074 | if (new_active->link == BOND_LINK_UP) { |
1075 | return new_active; | |
1076 | } else if (new_active->link == BOND_LINK_BACK && | |
1077 | IS_UP(new_active->dev)) { | |
1078 | /* link up, but waiting for stabilization */ | |
1079 | if (new_active->delay < mintime) { | |
1080 | mintime = new_active->delay; | |
1081 | bestslave = new_active; | |
1da177e4 LT |
1082 | } |
1083 | } | |
1084 | } | |
1085 | ||
1086 | return bestslave; | |
1087 | } | |
1088 | ||
1089 | /** | |
1090 | * change_active_interface - change the active slave into the specified one | |
1091 | * @bond: our bonding struct | |
1092 | * @new: the new slave to make the active one | |
1093 | * | |
1094 | * Set the new slave to the bond's settings and unset them on the old | |
1095 | * curr_active_slave. | |
1096 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1097 | * | |
1098 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1099 | * because it is apparently the best available slave we have, even though its | |
1100 | * updelay hasn't timed out yet. | |
1101 | * | |
3915c1e8 JV |
1102 | * If new_active is not NULL, caller must hold bond->lock for read and |
1103 | * curr_slave_lock for write_bh. | |
1da177e4 | 1104 | */ |
a77b5325 | 1105 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1106 | { |
1107 | struct slave *old_active = bond->curr_active_slave; | |
1108 | ||
3d632c3f | 1109 | if (old_active == new_active) |
1da177e4 | 1110 | return; |
1da177e4 LT |
1111 | |
1112 | if (new_active) { | |
b2220cad JV |
1113 | new_active->jiffies = jiffies; |
1114 | ||
1da177e4 LT |
1115 | if (new_active->link == BOND_LINK_BACK) { |
1116 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1117 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1118 | bond->dev->name, new_active->dev->name, | |
1119 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1120 | } |
1121 | ||
1122 | new_active->delay = 0; | |
1123 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1124 | |
3d632c3f | 1125 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1126 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1127 | |
58402054 | 1128 | if (bond_is_lb(bond)) |
1da177e4 | 1129 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1130 | } else { |
1131 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1132 | pr_info("%s: making interface %s the new active one.\n", |
1133 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1134 | } |
1135 | } | |
1136 | } | |
1137 | ||
3d632c3f | 1138 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1139 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1140 | |
58402054 | 1141 | if (bond_is_lb(bond)) { |
1da177e4 | 1142 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1143 | if (old_active) |
1144 | bond_set_slave_inactive_flags(old_active); | |
1145 | if (new_active) | |
1146 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1147 | } else { |
1148 | bond->curr_active_slave = new_active; | |
1149 | } | |
c3ade5ca JV |
1150 | |
1151 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1152 | if (old_active) |
c3ade5ca | 1153 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1154 | |
1155 | if (new_active) { | |
1156 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1157 | |
709f8a45 OG |
1158 | if (bond->params.fail_over_mac) |
1159 | bond_do_fail_over_mac(bond, new_active, | |
1160 | old_active); | |
3915c1e8 | 1161 | |
709f8a45 | 1162 | bond->send_grat_arp = bond->params.num_grat_arp; |
b59f9f74 | 1163 | bond_send_gratuitous_arp(bond); |
01f3109d | 1164 | |
305d552a BH |
1165 | bond->send_unsol_na = bond->params.num_unsol_na; |
1166 | bond_send_unsolicited_na(bond); | |
1167 | ||
01f3109d OG |
1168 | write_unlock_bh(&bond->curr_slave_lock); |
1169 | read_unlock(&bond->lock); | |
1170 | ||
75c78500 | 1171 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
01f3109d OG |
1172 | |
1173 | read_lock(&bond->lock); | |
1174 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1175 | } |
c3ade5ca | 1176 | } |
a2fd940f AG |
1177 | |
1178 | /* resend IGMP joins since all were sent on curr_active_slave */ | |
1179 | if (bond->params.mode == BOND_MODE_ROUNDROBIN) { | |
1180 | bond_resend_igmp_join_requests(bond); | |
1181 | } | |
1da177e4 LT |
1182 | } |
1183 | ||
1184 | /** | |
1185 | * bond_select_active_slave - select a new active slave, if needed | |
1186 | * @bond: our bonding struct | |
1187 | * | |
3d632c3f | 1188 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1189 | * - The old curr_active_slave has been released or lost its link. |
1190 | * - The primary_slave has got its link back. | |
1191 | * - A slave has got its link back and there's no old curr_active_slave. | |
1192 | * | |
3915c1e8 | 1193 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1194 | */ |
a77b5325 | 1195 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1196 | { |
1197 | struct slave *best_slave; | |
ff59c456 | 1198 | int rv; |
1da177e4 LT |
1199 | |
1200 | best_slave = bond_find_best_slave(bond); | |
1201 | if (best_slave != bond->curr_active_slave) { | |
1202 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1203 | rv = bond_set_carrier(bond); |
1204 | if (!rv) | |
1205 | return; | |
1206 | ||
1207 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1208 | pr_info("%s: first active interface up!\n", |
1209 | bond->dev->name); | |
ff59c456 | 1210 | } else { |
a4aee5c8 JP |
1211 | pr_info("%s: now running without any active interface !\n", |
1212 | bond->dev->name); | |
ff59c456 | 1213 | } |
1da177e4 LT |
1214 | } |
1215 | } | |
1216 | ||
1217 | /*--------------------------- slave list handling ---------------------------*/ | |
1218 | ||
1219 | /* | |
1220 | * This function attaches the slave to the end of list. | |
1221 | * | |
1222 | * bond->lock held for writing by caller. | |
1223 | */ | |
1224 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1225 | { | |
1226 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1227 | new_slave->next = new_slave; | |
1228 | new_slave->prev = new_slave; | |
1229 | bond->first_slave = new_slave; | |
1230 | } else { | |
1231 | new_slave->next = bond->first_slave; | |
1232 | new_slave->prev = bond->first_slave->prev; | |
1233 | new_slave->next->prev = new_slave; | |
1234 | new_slave->prev->next = new_slave; | |
1235 | } | |
1236 | ||
1237 | bond->slave_cnt++; | |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | * This function detaches the slave from the list. | |
1242 | * WARNING: no check is made to verify if the slave effectively | |
1243 | * belongs to <bond>. | |
1244 | * Nothing is freed on return, structures are just unchained. | |
1245 | * If any slave pointer in bond was pointing to <slave>, | |
1246 | * it should be changed by the calling function. | |
1247 | * | |
1248 | * bond->lock held for writing by caller. | |
1249 | */ | |
1250 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1251 | { | |
3d632c3f | 1252 | if (slave->next) |
1da177e4 | 1253 | slave->next->prev = slave->prev; |
1da177e4 | 1254 | |
3d632c3f | 1255 | if (slave->prev) |
1da177e4 | 1256 | slave->prev->next = slave->next; |
1da177e4 LT |
1257 | |
1258 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1259 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1260 | bond->first_slave = slave->next; | |
1261 | } else { | |
1262 | bond->first_slave = NULL; /* slave was the last one */ | |
1263 | } | |
1264 | } | |
1265 | ||
1266 | slave->next = NULL; | |
1267 | slave->prev = NULL; | |
1268 | bond->slave_cnt--; | |
1269 | } | |
1270 | ||
f6dc31a8 WC |
1271 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1272 | /* | |
1273 | * You must hold read lock on bond->lock before calling this. | |
1274 | */ | |
1275 | static bool slaves_support_netpoll(struct net_device *bond_dev) | |
1276 | { | |
1277 | struct bonding *bond = netdev_priv(bond_dev); | |
1278 | struct slave *slave; | |
1279 | int i = 0; | |
1280 | bool ret = true; | |
1281 | ||
1282 | bond_for_each_slave(bond, slave, i) { | |
1283 | if ((slave->dev->priv_flags & IFF_DISABLE_NETPOLL) || | |
1284 | !slave->dev->netdev_ops->ndo_poll_controller) | |
1285 | ret = false; | |
1286 | } | |
1287 | return i != 0 && ret; | |
1288 | } | |
1289 | ||
1290 | static void bond_poll_controller(struct net_device *bond_dev) | |
1291 | { | |
1292 | struct net_device *dev = bond_dev->npinfo->netpoll->real_dev; | |
1293 | if (dev != bond_dev) | |
1294 | netpoll_poll_dev(dev); | |
1295 | } | |
1296 | ||
1297 | static void bond_netpoll_cleanup(struct net_device *bond_dev) | |
1298 | { | |
1299 | struct bonding *bond = netdev_priv(bond_dev); | |
1300 | struct slave *slave; | |
1301 | const struct net_device_ops *ops; | |
1302 | int i; | |
1303 | ||
1304 | read_lock(&bond->lock); | |
1305 | bond_dev->npinfo = NULL; | |
1306 | bond_for_each_slave(bond, slave, i) { | |
1307 | if (slave->dev) { | |
1308 | ops = slave->dev->netdev_ops; | |
1309 | if (ops->ndo_netpoll_cleanup) | |
1310 | ops->ndo_netpoll_cleanup(slave->dev); | |
1311 | else | |
1312 | slave->dev->npinfo = NULL; | |
1313 | } | |
1314 | } | |
1315 | read_unlock(&bond->lock); | |
1316 | } | |
1317 | ||
1318 | #else | |
1319 | ||
1320 | static void bond_netpoll_cleanup(struct net_device *bond_dev) | |
1321 | { | |
1322 | } | |
1323 | ||
1324 | #endif | |
1325 | ||
1da177e4 LT |
1326 | /*---------------------------------- IOCTL ----------------------------------*/ |
1327 | ||
4ad072c9 AB |
1328 | static int bond_sethwaddr(struct net_device *bond_dev, |
1329 | struct net_device *slave_dev) | |
1da177e4 | 1330 | { |
5a03cdb7 HE |
1331 | pr_debug("bond_dev=%p\n", bond_dev); |
1332 | pr_debug("slave_dev=%p\n", slave_dev); | |
1333 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1334 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1335 | return 0; | |
1336 | } | |
1337 | ||
7f353bf2 HX |
1338 | #define BOND_VLAN_FEATURES \ |
1339 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1340 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff | 1341 | |
3d632c3f | 1342 | /* |
8e3babcd | 1343 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1344 | * feature bits are managed elsewhere, so preserve those feature bits |
1345 | * on the master device. | |
8531c5ff AK |
1346 | */ |
1347 | static int bond_compute_features(struct bonding *bond) | |
1348 | { | |
8531c5ff AK |
1349 | struct slave *slave; |
1350 | struct net_device *bond_dev = bond->dev; | |
7f353bf2 | 1351 | unsigned long features = bond_dev->features; |
278339a4 | 1352 | unsigned long vlan_features = 0; |
3158bf7d MS |
1353 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1354 | bond_dev->hard_header_len); | |
8e3babcd | 1355 | int i; |
8531c5ff | 1356 | |
7f353bf2 | 1357 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
b63365a2 HX |
1358 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; |
1359 | ||
1360 | if (!bond->first_slave) | |
1361 | goto done; | |
1362 | ||
1363 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1364 | |
278339a4 | 1365 | vlan_features = bond->first_slave->dev->vlan_features; |
54ef3137 | 1366 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1367 | features = netdev_increment_features(features, |
1368 | slave->dev->features, | |
1369 | NETIF_F_ONE_FOR_ALL); | |
278339a4 JV |
1370 | vlan_features = netdev_increment_features(vlan_features, |
1371 | slave->dev->vlan_features, | |
1372 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1373 | if (slave->dev->hard_header_len > max_hard_header_len) |
1374 | max_hard_header_len = slave->dev->hard_header_len; | |
1375 | } | |
8531c5ff | 1376 | |
b63365a2 | 1377 | done: |
7f353bf2 | 1378 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
b63365a2 | 1379 | bond_dev->features = netdev_fix_features(features, NULL); |
278339a4 | 1380 | bond_dev->vlan_features = netdev_fix_features(vlan_features, NULL); |
54ef3137 | 1381 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1382 | |
1383 | return 0; | |
1384 | } | |
1385 | ||
872254dd MS |
1386 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1387 | struct net_device *slave_dev) | |
1388 | { | |
454d7c9b | 1389 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1390 | |
00829823 | 1391 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1392 | |
1393 | bond_dev->type = slave_dev->type; | |
1394 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1395 | bond_dev->addr_len = slave_dev->addr_len; | |
1396 | ||
1397 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1398 | slave_dev->addr_len); | |
d90a162a | 1399 | bond->setup_by_slave = 1; |
872254dd MS |
1400 | } |
1401 | ||
1da177e4 | 1402 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1403 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1404 | { |
454d7c9b | 1405 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1406 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1407 | struct slave *new_slave = NULL; |
22bedad3 | 1408 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1409 | struct sockaddr addr; |
1410 | int link_reporting; | |
1411 | int old_features = bond_dev->features; | |
1412 | int res = 0; | |
1413 | ||
552709d5 | 1414 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1415 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1416 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1417 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | /* bond must be initialized by bond_open() before enslaving */ | |
1421 | if (!(bond_dev->flags & IFF_UP)) { | |
a4aee5c8 JP |
1422 | pr_warning("%s: master_dev is not up in bond_enslave\n", |
1423 | bond_dev->name); | |
1da177e4 LT |
1424 | } |
1425 | ||
1426 | /* already enslaved */ | |
1427 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1428 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1429 | return -EBUSY; |
1430 | } | |
1431 | ||
1432 | /* vlan challenged mutual exclusion */ | |
1433 | /* no need to lock since we're protected by rtnl_lock */ | |
1434 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1435 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 | 1436 | if (!list_empty(&bond->vlan_list)) { |
a4aee5c8 JP |
1437 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1438 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1439 | return -EPERM; |
1440 | } else { | |
a4aee5c8 JP |
1441 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1442 | bond_dev->name, slave_dev->name, | |
1443 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1444 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
1445 | } | |
1446 | } else { | |
5a03cdb7 | 1447 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1448 | if (bond->slave_cnt == 0) { |
1449 | /* First slave, and it is not VLAN challenged, | |
1450 | * so remove the block of adding VLANs over the bond. | |
1451 | */ | |
1452 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1453 | } | |
1454 | } | |
1455 | ||
217df670 JV |
1456 | /* |
1457 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1458 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1459 | * the current ifenslave will set the interface down prior to |
1460 | * enslaving it; the old ifenslave will not. | |
1461 | */ | |
1462 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1463 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1464 | slave_dev->name); |
1465 | res = -EPERM; | |
1466 | goto err_undo_flags; | |
1467 | } | |
1da177e4 | 1468 | |
872254dd MS |
1469 | /* set bonding device ether type by slave - bonding netdevices are |
1470 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1471 | * there is a need to override some of the type dependent attribs/funcs. | |
1472 | * | |
1473 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1474 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1475 | */ | |
1476 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1477 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1478 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1479 | bond_dev->name, |
1480 | bond_dev->type, slave_dev->type); | |
75c78500 | 1481 | |
3ca5b404 JP |
1482 | res = netdev_bonding_change(bond_dev, |
1483 | NETDEV_PRE_TYPE_CHANGE); | |
1484 | res = notifier_to_errno(res); | |
1485 | if (res) { | |
1486 | pr_err("%s: refused to change device type\n", | |
1487 | bond_dev->name); | |
1488 | res = -EBUSY; | |
1489 | goto err_undo_flags; | |
1490 | } | |
75c78500 | 1491 | |
32a806c1 | 1492 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1493 | dev_uc_flush(bond_dev); |
22bedad3 | 1494 | dev_mc_flush(bond_dev); |
32a806c1 | 1495 | |
e36b9d16 MS |
1496 | if (slave_dev->type != ARPHRD_ETHER) |
1497 | bond_setup_by_slave(bond_dev, slave_dev); | |
1498 | else | |
1499 | ether_setup(bond_dev); | |
75c78500 | 1500 | |
93d9b7d7 JP |
1501 | netdev_bonding_change(bond_dev, |
1502 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1503 | } |
872254dd | 1504 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1505 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1506 | slave_dev->name, | |
1507 | slave_dev->type, bond_dev->type); | |
1508 | res = -EINVAL; | |
1509 | goto err_undo_flags; | |
872254dd MS |
1510 | } |
1511 | ||
eb7cc59a | 1512 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1513 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1514 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1515 | bond_dev->name); | |
3915c1e8 JV |
1516 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1517 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1518 | 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", |
1519 | bond_dev->name); | |
2ab82852 MS |
1520 | res = -EOPNOTSUPP; |
1521 | goto err_undo_flags; | |
1522 | } | |
1da177e4 LT |
1523 | } |
1524 | ||
243cb4e5 | 1525 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1526 | if (!new_slave) { |
1527 | res = -ENOMEM; | |
1528 | goto err_undo_flags; | |
1529 | } | |
1530 | ||
1da177e4 LT |
1531 | /* save slave's original flags before calling |
1532 | * netdev_set_master and dev_open | |
1533 | */ | |
1534 | new_slave->original_flags = slave_dev->flags; | |
1535 | ||
217df670 JV |
1536 | /* |
1537 | * Save slave's original ("permanent") mac address for modes | |
1538 | * that need it, and for restoring it upon release, and then | |
1539 | * set it to the master's address | |
1540 | */ | |
1541 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1542 | |
dd957c57 | 1543 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1544 | /* |
1545 | * Set slave to master's mac address. The application already | |
1546 | * set the master's mac address to that of the first slave | |
1547 | */ | |
1548 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1549 | addr.sa_family = slave_dev->type; | |
1550 | res = dev_set_mac_address(slave_dev, &addr); | |
1551 | if (res) { | |
5a03cdb7 | 1552 | pr_debug("Error %d calling set_mac_address\n", res); |
2ab82852 MS |
1553 | goto err_free; |
1554 | } | |
217df670 | 1555 | } |
1da177e4 | 1556 | |
c2edacf8 JV |
1557 | res = netdev_set_master(slave_dev, bond_dev); |
1558 | if (res) { | |
5a03cdb7 | 1559 | pr_debug("Error %d calling netdev_set_master\n", res); |
569f0c4d | 1560 | goto err_restore_mac; |
c2edacf8 | 1561 | } |
217df670 JV |
1562 | /* open the slave since the application closed it */ |
1563 | res = dev_open(slave_dev); | |
1564 | if (res) { | |
3d632c3f | 1565 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
569f0c4d | 1566 | goto err_unset_master; |
1da177e4 LT |
1567 | } |
1568 | ||
1da177e4 | 1569 | new_slave->dev = slave_dev; |
0b680e75 | 1570 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1571 | |
58402054 | 1572 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1573 | /* bond_alb_init_slave() must be called before all other stages since |
1574 | * it might fail and we do not want to have to undo everything | |
1575 | */ | |
1576 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1577 | if (res) |
569f0c4d | 1578 | goto err_close; |
1da177e4 LT |
1579 | } |
1580 | ||
1581 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1582 | * master's promisc (and mc) settings only if it becomes the | |
1583 | * curr_active_slave, and that is taken care of later when calling | |
1584 | * bond_change_active() | |
1585 | */ | |
1586 | if (!USES_PRIMARY(bond->params.mode)) { | |
1587 | /* set promiscuity level to new slave */ | |
1588 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1589 | res = dev_set_promiscuity(slave_dev, 1); |
1590 | if (res) | |
1591 | goto err_close; | |
1da177e4 LT |
1592 | } |
1593 | ||
1594 | /* set allmulti level to new slave */ | |
1595 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1596 | res = dev_set_allmulti(slave_dev, 1); |
1597 | if (res) | |
1598 | goto err_close; | |
1da177e4 LT |
1599 | } |
1600 | ||
b9e40857 | 1601 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1602 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1603 | netdev_for_each_mc_addr(ha, bond_dev) |
1604 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1605 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1606 | } |
1607 | ||
1608 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1609 | /* add lacpdu mc addr to mc list */ | |
1610 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1611 | ||
22bedad3 | 1612 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1613 | } |
1614 | ||
1615 | bond_add_vlans_on_slave(bond, slave_dev); | |
1616 | ||
1617 | write_lock_bh(&bond->lock); | |
1618 | ||
1619 | bond_attach_slave(bond, new_slave); | |
1620 | ||
1621 | new_slave->delay = 0; | |
1622 | new_slave->link_failure_count = 0; | |
1623 | ||
8531c5ff AK |
1624 | bond_compute_features(bond); |
1625 | ||
3915c1e8 JV |
1626 | write_unlock_bh(&bond->lock); |
1627 | ||
1628 | read_lock(&bond->lock); | |
1629 | ||
f5b2b966 JV |
1630 | new_slave->last_arp_rx = jiffies; |
1631 | ||
1da177e4 LT |
1632 | if (bond->params.miimon && !bond->params.use_carrier) { |
1633 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1634 | ||
1635 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1636 | /* | |
1637 | * miimon is set but a bonded network driver | |
1638 | * does not support ETHTOOL/MII and | |
1639 | * arp_interval is not set. Note: if | |
1640 | * use_carrier is enabled, we will never go | |
1641 | * here (because netif_carrier is always | |
1642 | * supported); thus, we don't need to change | |
1643 | * the messages for netif_carrier. | |
1644 | */ | |
a4aee5c8 | 1645 | 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 | 1646 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1647 | } else if (link_reporting == -1) { |
1648 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1649 | 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", |
1650 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1651 | } |
1652 | } | |
1653 | ||
1654 | /* check for initial state */ | |
1655 | if (!bond->params.miimon || | |
1656 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1657 | if (bond->params.updelay) { | |
a4aee5c8 | 1658 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1659 | new_slave->link = BOND_LINK_BACK; |
1660 | new_slave->delay = bond->params.updelay; | |
1661 | } else { | |
a4aee5c8 | 1662 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1663 | new_slave->link = BOND_LINK_UP; |
1664 | } | |
1665 | new_slave->jiffies = jiffies; | |
1666 | } else { | |
a4aee5c8 | 1667 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1668 | new_slave->link = BOND_LINK_DOWN; |
1669 | } | |
1670 | ||
1671 | if (bond_update_speed_duplex(new_slave) && | |
1672 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1673 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1674 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1675 | |
1676 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1677 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1678 | bond_dev->name); | |
1da177e4 LT |
1679 | } |
1680 | } | |
1681 | ||
1682 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1683 | /* if there is a primary slave, remember it */ | |
a549952a | 1684 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1685 | bond->primary_slave = new_slave; |
a549952a JP |
1686 | bond->force_primary = true; |
1687 | } | |
1da177e4 LT |
1688 | } |
1689 | ||
3915c1e8 JV |
1690 | write_lock_bh(&bond->curr_slave_lock); |
1691 | ||
1da177e4 LT |
1692 | switch (bond->params.mode) { |
1693 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1694 | bond_set_slave_inactive_flags(new_slave); |
1695 | bond_select_active_slave(bond); | |
1da177e4 LT |
1696 | break; |
1697 | case BOND_MODE_8023AD: | |
1698 | /* in 802.3ad mode, the internal mechanism | |
1699 | * will activate the slaves in the selected | |
1700 | * aggregator | |
1701 | */ | |
1702 | bond_set_slave_inactive_flags(new_slave); | |
1703 | /* if this is the first slave */ | |
1704 | if (bond->slave_cnt == 1) { | |
1705 | SLAVE_AD_INFO(new_slave).id = 1; | |
1706 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1707 | * can be called only after the mac address of the bond is set | |
1708 | */ | |
1709 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1710 | bond->params.lacp_fast); | |
1711 | } else { | |
1712 | SLAVE_AD_INFO(new_slave).id = | |
1713 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1714 | } | |
1715 | ||
1716 | bond_3ad_bind_slave(new_slave); | |
1717 | break; | |
1718 | case BOND_MODE_TLB: | |
1719 | case BOND_MODE_ALB: | |
1720 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1721 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1722 | bond_select_active_slave(bond); |
1da177e4 LT |
1723 | break; |
1724 | default: | |
5a03cdb7 | 1725 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1726 | |
1727 | /* always active in trunk mode */ | |
1728 | new_slave->state = BOND_STATE_ACTIVE; | |
1729 | ||
1730 | /* In trunking mode there is little meaning to curr_active_slave | |
1731 | * anyway (it holds no special properties of the bond device), | |
1732 | * so we can change it without calling change_active_interface() | |
1733 | */ | |
3d632c3f | 1734 | if (!bond->curr_active_slave) |
1da177e4 | 1735 | bond->curr_active_slave = new_slave; |
3d632c3f | 1736 | |
1da177e4 LT |
1737 | break; |
1738 | } /* switch(bond_mode) */ | |
1739 | ||
3915c1e8 JV |
1740 | write_unlock_bh(&bond->curr_slave_lock); |
1741 | ||
ff59c456 JV |
1742 | bond_set_carrier(bond); |
1743 | ||
f6dc31a8 WC |
1744 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1745 | if (slaves_support_netpoll(bond_dev)) { | |
1746 | bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL; | |
1747 | if (bond_dev->npinfo) | |
1748 | slave_dev->npinfo = bond_dev->npinfo; | |
1749 | } else if (!(bond_dev->priv_flags & IFF_DISABLE_NETPOLL)) { | |
1750 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; | |
1751 | pr_info("New slave device %s does not support netpoll\n", | |
1752 | slave_dev->name); | |
1753 | pr_info("Disabling netpoll support for %s\n", bond_dev->name); | |
1754 | } | |
1755 | #endif | |
3915c1e8 | 1756 | read_unlock(&bond->lock); |
1da177e4 | 1757 | |
b76cdba9 MW |
1758 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1759 | if (res) | |
569f0c4d | 1760 | goto err_close; |
b76cdba9 | 1761 | |
a4aee5c8 JP |
1762 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1763 | bond_dev->name, slave_dev->name, | |
1764 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1765 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1da177e4 LT |
1766 | |
1767 | /* enslave is successful */ | |
1768 | return 0; | |
1769 | ||
1770 | /* Undo stages on error */ | |
1da177e4 LT |
1771 | err_close: |
1772 | dev_close(slave_dev); | |
1773 | ||
569f0c4d JV |
1774 | err_unset_master: |
1775 | netdev_set_master(slave_dev, NULL); | |
1776 | ||
1da177e4 | 1777 | err_restore_mac: |
dd957c57 | 1778 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1779 | /* XXX TODO - fom follow mode needs to change master's |
1780 | * MAC if this slave's MAC is in use by the bond, or at | |
1781 | * least print a warning. | |
1782 | */ | |
2ab82852 MS |
1783 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1784 | addr.sa_family = slave_dev->type; | |
1785 | dev_set_mac_address(slave_dev, &addr); | |
1786 | } | |
1da177e4 LT |
1787 | |
1788 | err_free: | |
1789 | kfree(new_slave); | |
1790 | ||
1791 | err_undo_flags: | |
1792 | bond_dev->features = old_features; | |
3d632c3f | 1793 | |
1da177e4 LT |
1794 | return res; |
1795 | } | |
1796 | ||
1797 | /* | |
1798 | * Try to release the slave device <slave> from the bond device <master> | |
1799 | * It is legal to access curr_active_slave without a lock because all the function | |
1800 | * is write-locked. | |
1801 | * | |
1802 | * The rules for slave state should be: | |
1803 | * for Active/Backup: | |
1804 | * Active stays on all backups go down | |
1805 | * for Bonded connections: | |
1806 | * The first up interface should be left on and all others downed. | |
1807 | */ | |
a77b5325 | 1808 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1809 | { |
454d7c9b | 1810 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1811 | struct slave *slave, *oldcurrent; |
1812 | struct sockaddr addr; | |
1da177e4 LT |
1813 | |
1814 | /* slave is not a slave or master is not master of this slave */ | |
1815 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1816 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1817 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1818 | bond_dev->name, slave_dev->name); |
1819 | return -EINVAL; | |
1820 | } | |
1821 | ||
f6dc31a8 | 1822 | netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE); |
1da177e4 LT |
1823 | write_lock_bh(&bond->lock); |
1824 | ||
1825 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1826 | if (!slave) { | |
1827 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1828 | pr_info("%s: %s not enslaved\n", |
1829 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1830 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1831 | return -EINVAL; |
1832 | } | |
1833 | ||
3915c1e8 | 1834 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1835 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1836 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1837 | 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", |
1838 | bond_dev->name, slave_dev->name, | |
1839 | slave->perm_hwaddr, | |
1840 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1841 | } |
1842 | ||
1843 | /* Inform AD package of unbinding of slave. */ | |
1844 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1845 | /* must be called before the slave is | |
1846 | * detached from the list | |
1847 | */ | |
1848 | bond_3ad_unbind_slave(slave); | |
1849 | } | |
1850 | ||
a4aee5c8 JP |
1851 | pr_info("%s: releasing %s interface %s\n", |
1852 | bond_dev->name, | |
1853 | (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup", | |
1854 | slave_dev->name); | |
1da177e4 LT |
1855 | |
1856 | oldcurrent = bond->curr_active_slave; | |
1857 | ||
1858 | bond->current_arp_slave = NULL; | |
1859 | ||
1860 | /* release the slave from its bond */ | |
1861 | bond_detach_slave(bond, slave); | |
1862 | ||
8531c5ff AK |
1863 | bond_compute_features(bond); |
1864 | ||
3d632c3f | 1865 | if (bond->primary_slave == slave) |
1da177e4 | 1866 | bond->primary_slave = NULL; |
1da177e4 | 1867 | |
3d632c3f | 1868 | if (oldcurrent == slave) |
1da177e4 | 1869 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1870 | |
58402054 | 1871 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1872 | /* Must be called only after the slave has been |
1873 | * detached from the list and the curr_active_slave | |
1874 | * has been cleared (if our_slave == old_current), | |
1875 | * but before a new active slave is selected. | |
1876 | */ | |
2543331d | 1877 | write_unlock_bh(&bond->lock); |
1da177e4 | 1878 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1879 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1880 | } |
1881 | ||
059fe7a5 JV |
1882 | if (oldcurrent == slave) { |
1883 | /* | |
1884 | * Note that we hold RTNL over this sequence, so there | |
1885 | * is no concern that another slave add/remove event | |
1886 | * will interfere. | |
1887 | */ | |
1888 | write_unlock_bh(&bond->lock); | |
1889 | read_lock(&bond->lock); | |
1890 | write_lock_bh(&bond->curr_slave_lock); | |
1891 | ||
1da177e4 LT |
1892 | bond_select_active_slave(bond); |
1893 | ||
059fe7a5 JV |
1894 | write_unlock_bh(&bond->curr_slave_lock); |
1895 | read_unlock(&bond->lock); | |
1896 | write_lock_bh(&bond->lock); | |
1897 | } | |
1898 | ||
1da177e4 | 1899 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1900 | bond_set_carrier(bond); |
1901 | ||
1da177e4 LT |
1902 | /* if the last slave was removed, zero the mac address |
1903 | * of the master so it will be set by the application | |
1904 | * to the mac address of the first slave | |
1905 | */ | |
1906 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1907 | ||
1908 | if (list_empty(&bond->vlan_list)) { | |
1909 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1910 | } else { | |
a4aee5c8 JP |
1911 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
1912 | bond_dev->name, bond_dev->name); | |
1913 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
1914 | bond_dev->name); | |
1da177e4 LT |
1915 | } |
1916 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1917 | !bond_has_challenged_slaves(bond)) { | |
a4aee5c8 JP |
1918 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", |
1919 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1920 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1921 | } | |
1922 | ||
1923 | write_unlock_bh(&bond->lock); | |
1924 | ||
b76cdba9 MW |
1925 | /* must do this from outside any spinlocks */ |
1926 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1927 | ||
1da177e4 LT |
1928 | bond_del_vlans_from_slave(bond, slave_dev); |
1929 | ||
1930 | /* If the mode USES_PRIMARY, then we should only remove its | |
1931 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1932 | * already taken care of above when we detached the slave | |
1933 | */ | |
1934 | if (!USES_PRIMARY(bond->params.mode)) { | |
1935 | /* unset promiscuity level from slave */ | |
3d632c3f | 1936 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 1937 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
1938 | |
1939 | /* unset allmulti level from slave */ | |
3d632c3f | 1940 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 1941 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
1942 | |
1943 | /* flush master's mc_list from slave */ | |
b9e40857 | 1944 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1945 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 1946 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1947 | } |
1948 | ||
1949 | netdev_set_master(slave_dev, NULL); | |
1950 | ||
f6dc31a8 WC |
1951 | #ifdef CONFIG_NET_POLL_CONTROLLER |
1952 | read_lock_bh(&bond->lock); | |
1953 | if (slaves_support_netpoll(bond_dev)) | |
1954 | bond_dev->priv_flags &= ~IFF_DISABLE_NETPOLL; | |
1955 | read_unlock_bh(&bond->lock); | |
1956 | if (slave_dev->netdev_ops->ndo_netpoll_cleanup) | |
1957 | slave_dev->netdev_ops->ndo_netpoll_cleanup(slave_dev); | |
1958 | else | |
1959 | slave_dev->npinfo = NULL; | |
1960 | #endif | |
1961 | ||
1da177e4 LT |
1962 | /* close slave before restoring its mac address */ |
1963 | dev_close(slave_dev); | |
1964 | ||
3915c1e8 | 1965 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1966 | /* restore original ("permanent") mac address */ |
1967 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1968 | addr.sa_family = slave_dev->type; | |
1969 | dev_set_mac_address(slave_dev, &addr); | |
1970 | } | |
1da177e4 | 1971 | |
8f903c70 | 1972 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1973 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1974 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1975 | |
1976 | kfree(slave); | |
1977 | ||
1978 | return 0; /* deletion OK */ | |
1979 | } | |
1980 | ||
d90a162a | 1981 | /* |
3d632c3f | 1982 | * First release a slave and than destroy the bond if no more slaves are left. |
d90a162a MS |
1983 | * Must be under rtnl_lock when this function is called. |
1984 | */ | |
3d632c3f SH |
1985 | int bond_release_and_destroy(struct net_device *bond_dev, |
1986 | struct net_device *slave_dev) | |
d90a162a | 1987 | { |
454d7c9b | 1988 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
1989 | int ret; |
1990 | ||
1991 | ret = bond_release(bond_dev, slave_dev); | |
1992 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
a4aee5c8 JP |
1993 | pr_info("%s: destroying bond %s.\n", |
1994 | bond_dev->name, bond_dev->name); | |
9e71626c | 1995 | unregister_netdevice(bond_dev); |
d90a162a MS |
1996 | } |
1997 | return ret; | |
1998 | } | |
1999 | ||
1da177e4 LT |
2000 | /* |
2001 | * This function releases all slaves. | |
2002 | */ | |
2003 | static int bond_release_all(struct net_device *bond_dev) | |
2004 | { | |
454d7c9b | 2005 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2006 | struct slave *slave; |
2007 | struct net_device *slave_dev; | |
2008 | struct sockaddr addr; | |
2009 | ||
2010 | write_lock_bh(&bond->lock); | |
2011 | ||
ff59c456 JV |
2012 | netif_carrier_off(bond_dev); |
2013 | ||
3d632c3f | 2014 | if (bond->slave_cnt == 0) |
1da177e4 | 2015 | goto out; |
1da177e4 LT |
2016 | |
2017 | bond->current_arp_slave = NULL; | |
2018 | bond->primary_slave = NULL; | |
2019 | bond_change_active_slave(bond, NULL); | |
2020 | ||
2021 | while ((slave = bond->first_slave) != NULL) { | |
2022 | /* Inform AD package of unbinding of slave | |
2023 | * before slave is detached from the list. | |
2024 | */ | |
3d632c3f | 2025 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2026 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2027 | |
2028 | slave_dev = slave->dev; | |
2029 | bond_detach_slave(bond, slave); | |
2030 | ||
2543331d JV |
2031 | /* now that the slave is detached, unlock and perform |
2032 | * all the undo steps that should not be called from | |
2033 | * within a lock. | |
2034 | */ | |
2035 | write_unlock_bh(&bond->lock); | |
2036 | ||
58402054 | 2037 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2038 | /* must be called only after the slave |
2039 | * has been detached from the list | |
2040 | */ | |
2041 | bond_alb_deinit_slave(bond, slave); | |
2042 | } | |
2043 | ||
8531c5ff AK |
2044 | bond_compute_features(bond); |
2045 | ||
b76cdba9 | 2046 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2047 | bond_del_vlans_from_slave(bond, slave_dev); |
2048 | ||
2049 | /* If the mode USES_PRIMARY, then we should only remove its | |
2050 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2051 | * already taken care of above when we detached the slave | |
2052 | */ | |
2053 | if (!USES_PRIMARY(bond->params.mode)) { | |
2054 | /* unset promiscuity level from slave */ | |
3d632c3f | 2055 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2056 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2057 | |
2058 | /* unset allmulti level from slave */ | |
3d632c3f | 2059 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2060 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2061 | |
2062 | /* flush master's mc_list from slave */ | |
b9e40857 | 2063 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2064 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2065 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2066 | } |
2067 | ||
2068 | netdev_set_master(slave_dev, NULL); | |
2069 | ||
2070 | /* close slave before restoring its mac address */ | |
2071 | dev_close(slave_dev); | |
2072 | ||
dd957c57 | 2073 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2074 | /* restore original ("permanent") mac address*/ |
2075 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2076 | addr.sa_family = slave_dev->type; | |
2077 | dev_set_mac_address(slave_dev, &addr); | |
2078 | } | |
1da177e4 | 2079 | |
8f903c70 JV |
2080 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
2081 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
2082 | |
2083 | kfree(slave); | |
2084 | ||
2085 | /* re-acquire the lock before getting the next slave */ | |
2086 | write_lock_bh(&bond->lock); | |
2087 | } | |
2088 | ||
2089 | /* zero the mac address of the master so it will be | |
2090 | * set by the application to the mac address of the | |
2091 | * first slave | |
2092 | */ | |
2093 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2094 | ||
3d632c3f | 2095 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 2096 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
3d632c3f | 2097 | else { |
a4aee5c8 JP |
2098 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2099 | bond_dev->name, bond_dev->name); | |
2100 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2101 | bond_dev->name); | |
1da177e4 LT |
2102 | } |
2103 | ||
a4aee5c8 | 2104 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2105 | |
2106 | out: | |
2107 | write_unlock_bh(&bond->lock); | |
2108 | ||
2109 | return 0; | |
2110 | } | |
2111 | ||
2112 | /* | |
2113 | * This function changes the active slave to slave <slave_dev>. | |
2114 | * It returns -EINVAL in the following cases. | |
2115 | * - <slave_dev> is not found in the list. | |
2116 | * - There is not active slave now. | |
2117 | * - <slave_dev> is already active. | |
2118 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2119 | * - <slave_dev> is not running. | |
3d632c3f SH |
2120 | * In these cases, this function does nothing. |
2121 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2122 | */ |
2123 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2124 | { | |
454d7c9b | 2125 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2126 | struct slave *old_active = NULL; |
2127 | struct slave *new_active = NULL; | |
2128 | int res = 0; | |
2129 | ||
3d632c3f | 2130 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2131 | return -EINVAL; |
1da177e4 LT |
2132 | |
2133 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2134 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2135 | return -EINVAL; |
1da177e4 | 2136 | |
059fe7a5 | 2137 | read_lock(&bond->lock); |
1da177e4 | 2138 | |
059fe7a5 | 2139 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2140 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2141 | read_unlock(&bond->curr_slave_lock); |
2142 | ||
1da177e4 LT |
2143 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2144 | ||
2145 | /* | |
2146 | * Changing to the current active: do nothing; return success. | |
2147 | */ | |
2148 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2149 | read_unlock(&bond->lock); |
1da177e4 LT |
2150 | return 0; |
2151 | } | |
2152 | ||
2153 | if ((new_active) && | |
2154 | (old_active) && | |
2155 | (new_active->link == BOND_LINK_UP) && | |
2156 | IS_UP(new_active->dev)) { | |
059fe7a5 | 2157 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2158 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2159 | write_unlock_bh(&bond->curr_slave_lock); |
3d632c3f | 2160 | } else |
1da177e4 | 2161 | res = -EINVAL; |
1da177e4 | 2162 | |
059fe7a5 | 2163 | read_unlock(&bond->lock); |
1da177e4 LT |
2164 | |
2165 | return res; | |
2166 | } | |
2167 | ||
1da177e4 LT |
2168 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2169 | { | |
454d7c9b | 2170 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2171 | |
2172 | info->bond_mode = bond->params.mode; | |
2173 | info->miimon = bond->params.miimon; | |
2174 | ||
6603a6f2 | 2175 | read_lock(&bond->lock); |
1da177e4 | 2176 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2177 | read_unlock(&bond->lock); |
1da177e4 LT |
2178 | |
2179 | return 0; | |
2180 | } | |
2181 | ||
2182 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2183 | { | |
454d7c9b | 2184 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2185 | struct slave *slave; |
689c96cc | 2186 | int i, res = -ENODEV; |
1da177e4 | 2187 | |
6603a6f2 | 2188 | read_lock(&bond->lock); |
1da177e4 LT |
2189 | |
2190 | bond_for_each_slave(bond, slave, i) { | |
2191 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2192 | res = 0; |
2193 | strcpy(info->slave_name, slave->dev->name); | |
2194 | info->link = slave->link; | |
2195 | info->state = slave->state; | |
2196 | info->link_failure_count = slave->link_failure_count; | |
1da177e4 LT |
2197 | break; |
2198 | } | |
2199 | } | |
2200 | ||
6603a6f2 | 2201 | read_unlock(&bond->lock); |
1da177e4 | 2202 | |
689c96cc | 2203 | return res; |
1da177e4 LT |
2204 | } |
2205 | ||
2206 | /*-------------------------------- Monitoring -------------------------------*/ | |
2207 | ||
1da177e4 | 2208 | |
f0c76d61 JV |
2209 | static int bond_miimon_inspect(struct bonding *bond) |
2210 | { | |
2211 | struct slave *slave; | |
2212 | int i, link_state, commit = 0; | |
41f89100 JP |
2213 | bool ignore_updelay; |
2214 | ||
2215 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2216 | |
2217 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2218 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2219 | |
f0c76d61 | 2220 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2221 | |
2222 | switch (slave->link) { | |
f0c76d61 JV |
2223 | case BOND_LINK_UP: |
2224 | if (link_state) | |
2225 | continue; | |
1da177e4 | 2226 | |
f0c76d61 JV |
2227 | slave->link = BOND_LINK_FAIL; |
2228 | slave->delay = bond->params.downdelay; | |
2229 | if (slave->delay) { | |
a4aee5c8 JP |
2230 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2231 | bond->dev->name, | |
2232 | (bond->params.mode == | |
2233 | BOND_MODE_ACTIVEBACKUP) ? | |
2234 | ((slave->state == BOND_STATE_ACTIVE) ? | |
2235 | "active " : "backup ") : "", | |
2236 | slave->dev->name, | |
2237 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2238 | } |
f0c76d61 JV |
2239 | /*FALLTHRU*/ |
2240 | case BOND_LINK_FAIL: | |
2241 | if (link_state) { | |
2242 | /* | |
2243 | * recovered before downdelay expired | |
2244 | */ | |
2245 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2246 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2247 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2248 | bond->dev->name, | |
2249 | (bond->params.downdelay - slave->delay) * | |
2250 | bond->params.miimon, | |
2251 | slave->dev->name); | |
f0c76d61 | 2252 | continue; |
1da177e4 | 2253 | } |
f0c76d61 JV |
2254 | |
2255 | if (slave->delay <= 0) { | |
2256 | slave->new_link = BOND_LINK_DOWN; | |
2257 | commit++; | |
2258 | continue; | |
1da177e4 | 2259 | } |
1da177e4 | 2260 | |
f0c76d61 JV |
2261 | slave->delay--; |
2262 | break; | |
2263 | ||
2264 | case BOND_LINK_DOWN: | |
2265 | if (!link_state) | |
2266 | continue; | |
2267 | ||
2268 | slave->link = BOND_LINK_BACK; | |
2269 | slave->delay = bond->params.updelay; | |
2270 | ||
2271 | if (slave->delay) { | |
a4aee5c8 JP |
2272 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2273 | bond->dev->name, slave->dev->name, | |
2274 | ignore_updelay ? 0 : | |
2275 | bond->params.updelay * | |
2276 | bond->params.miimon); | |
f0c76d61 JV |
2277 | } |
2278 | /*FALLTHRU*/ | |
2279 | case BOND_LINK_BACK: | |
2280 | if (!link_state) { | |
2281 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2282 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2283 | bond->dev->name, | |
2284 | (bond->params.updelay - slave->delay) * | |
2285 | bond->params.miimon, | |
2286 | slave->dev->name); | |
f0c76d61 JV |
2287 | |
2288 | continue; | |
2289 | } | |
2290 | ||
41f89100 JP |
2291 | if (ignore_updelay) |
2292 | slave->delay = 0; | |
2293 | ||
f0c76d61 JV |
2294 | if (slave->delay <= 0) { |
2295 | slave->new_link = BOND_LINK_UP; | |
2296 | commit++; | |
41f89100 | 2297 | ignore_updelay = false; |
f0c76d61 | 2298 | continue; |
1da177e4 | 2299 | } |
f0c76d61 JV |
2300 | |
2301 | slave->delay--; | |
1da177e4 | 2302 | break; |
f0c76d61 JV |
2303 | } |
2304 | } | |
1da177e4 | 2305 | |
f0c76d61 JV |
2306 | return commit; |
2307 | } | |
1da177e4 | 2308 | |
f0c76d61 JV |
2309 | static void bond_miimon_commit(struct bonding *bond) |
2310 | { | |
2311 | struct slave *slave; | |
2312 | int i; | |
2313 | ||
2314 | bond_for_each_slave(bond, slave, i) { | |
2315 | switch (slave->new_link) { | |
2316 | case BOND_LINK_NOCHANGE: | |
2317 | continue; | |
1da177e4 | 2318 | |
f0c76d61 JV |
2319 | case BOND_LINK_UP: |
2320 | slave->link = BOND_LINK_UP; | |
2321 | slave->jiffies = jiffies; | |
2322 | ||
2323 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2324 | /* prevent it from being the active one */ | |
2325 | slave->state = BOND_STATE_BACKUP; | |
2326 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2327 | /* make it immediately active */ | |
2328 | slave->state = BOND_STATE_ACTIVE; | |
2329 | } else if (slave != bond->primary_slave) { | |
2330 | /* prevent it from being the active one */ | |
2331 | slave->state = BOND_STATE_BACKUP; | |
1da177e4 | 2332 | } |
1da177e4 | 2333 | |
a4aee5c8 JP |
2334 | pr_info("%s: link status definitely up for interface %s.\n", |
2335 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2336 | |
f0c76d61 JV |
2337 | /* notify ad that the link status has changed */ |
2338 | if (bond->params.mode == BOND_MODE_8023AD) | |
2339 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2340 | |
58402054 | 2341 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2342 | bond_alb_handle_link_change(bond, slave, |
2343 | BOND_LINK_UP); | |
1da177e4 | 2344 | |
f0c76d61 JV |
2345 | if (!bond->curr_active_slave || |
2346 | (slave == bond->primary_slave)) | |
2347 | goto do_failover; | |
1da177e4 | 2348 | |
f0c76d61 | 2349 | continue; |
059fe7a5 | 2350 | |
f0c76d61 | 2351 | case BOND_LINK_DOWN: |
fba4acda JV |
2352 | if (slave->link_failure_count < UINT_MAX) |
2353 | slave->link_failure_count++; | |
2354 | ||
f0c76d61 | 2355 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2356 | |
f0c76d61 JV |
2357 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2358 | bond->params.mode == BOND_MODE_8023AD) | |
2359 | bond_set_slave_inactive_flags(slave); | |
2360 | ||
a4aee5c8 JP |
2361 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2362 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2363 | |
2364 | if (bond->params.mode == BOND_MODE_8023AD) | |
2365 | bond_3ad_handle_link_change(slave, | |
2366 | BOND_LINK_DOWN); | |
2367 | ||
ae63e808 | 2368 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2369 | bond_alb_handle_link_change(bond, slave, |
2370 | BOND_LINK_DOWN); | |
2371 | ||
2372 | if (slave == bond->curr_active_slave) | |
2373 | goto do_failover; | |
2374 | ||
2375 | continue; | |
2376 | ||
2377 | default: | |
a4aee5c8 | 2378 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2379 | bond->dev->name, slave->new_link, |
2380 | slave->dev->name); | |
2381 | slave->new_link = BOND_LINK_NOCHANGE; | |
2382 | ||
2383 | continue; | |
2384 | } | |
2385 | ||
2386 | do_failover: | |
2387 | ASSERT_RTNL(); | |
2388 | write_lock_bh(&bond->curr_slave_lock); | |
2389 | bond_select_active_slave(bond); | |
2390 | write_unlock_bh(&bond->curr_slave_lock); | |
2391 | } | |
2392 | ||
2393 | bond_set_carrier(bond); | |
1da177e4 LT |
2394 | } |
2395 | ||
0b0eef66 JV |
2396 | /* |
2397 | * bond_mii_monitor | |
2398 | * | |
2399 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2400 | * inspection, then (if inspection indicates something needs to be done) |
2401 | * an acquisition of appropriate locks followed by a commit phase to | |
2402 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2403 | */ |
2404 | void bond_mii_monitor(struct work_struct *work) | |
2405 | { | |
2406 | struct bonding *bond = container_of(work, struct bonding, | |
2407 | mii_work.work); | |
0b0eef66 JV |
2408 | |
2409 | read_lock(&bond->lock); | |
f0c76d61 JV |
2410 | if (bond->kill_timers) |
2411 | goto out; | |
2412 | ||
2413 | if (bond->slave_cnt == 0) | |
2414 | goto re_arm; | |
b59f9f74 JV |
2415 | |
2416 | if (bond->send_grat_arp) { | |
2417 | read_lock(&bond->curr_slave_lock); | |
2418 | bond_send_gratuitous_arp(bond); | |
2419 | read_unlock(&bond->curr_slave_lock); | |
2420 | } | |
2421 | ||
305d552a BH |
2422 | if (bond->send_unsol_na) { |
2423 | read_lock(&bond->curr_slave_lock); | |
2424 | bond_send_unsolicited_na(bond); | |
2425 | read_unlock(&bond->curr_slave_lock); | |
2426 | } | |
2427 | ||
f0c76d61 | 2428 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2429 | read_unlock(&bond->lock); |
2430 | rtnl_lock(); | |
2431 | read_lock(&bond->lock); | |
f0c76d61 JV |
2432 | |
2433 | bond_miimon_commit(bond); | |
2434 | ||
5655662d JV |
2435 | read_unlock(&bond->lock); |
2436 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2437 | read_lock(&bond->lock); | |
0b0eef66 JV |
2438 | } |
2439 | ||
f0c76d61 JV |
2440 | re_arm: |
2441 | if (bond->params.miimon) | |
2442 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2443 | msecs_to_jiffies(bond->params.miimon)); | |
2444 | out: | |
0b0eef66 | 2445 | read_unlock(&bond->lock); |
0b0eef66 | 2446 | } |
c3ade5ca | 2447 | |
d3bb52b0 | 2448 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2449 | { |
2450 | struct in_device *idev; | |
2451 | struct in_ifaddr *ifa; | |
a144ea4b | 2452 | __be32 addr = 0; |
c3ade5ca JV |
2453 | |
2454 | if (!dev) | |
2455 | return 0; | |
2456 | ||
2457 | rcu_read_lock(); | |
e5ed6399 | 2458 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2459 | if (!idev) |
2460 | goto out; | |
2461 | ||
2462 | ifa = idev->ifa_list; | |
2463 | if (!ifa) | |
2464 | goto out; | |
2465 | ||
2466 | addr = ifa->ifa_local; | |
2467 | out: | |
2468 | rcu_read_unlock(); | |
2469 | return addr; | |
2470 | } | |
2471 | ||
d3bb52b0 | 2472 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2473 | { |
0883beca | 2474 | struct vlan_entry *vlan; |
f5b2b966 JV |
2475 | |
2476 | if (ip == bond->master_ip) | |
2477 | return 1; | |
2478 | ||
0883beca | 2479 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2480 | if (ip == vlan->vlan_ip) |
2481 | return 1; | |
2482 | } | |
2483 | ||
2484 | return 0; | |
2485 | } | |
2486 | ||
c3ade5ca JV |
2487 | /* |
2488 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2489 | * switches in VLAN mode (especially if ports are configured as | |
2490 | * "native" to a VLAN) might not pass non-tagged frames. | |
2491 | */ | |
d3bb52b0 | 2492 | 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 |
2493 | { |
2494 | struct sk_buff *skb; | |
2495 | ||
5a03cdb7 | 2496 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2497 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2498 | |
c3ade5ca JV |
2499 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2500 | NULL, slave_dev->dev_addr, NULL); | |
2501 | ||
2502 | if (!skb) { | |
a4aee5c8 | 2503 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2504 | return; |
2505 | } | |
2506 | if (vlan_id) { | |
2507 | skb = vlan_put_tag(skb, vlan_id); | |
2508 | if (!skb) { | |
a4aee5c8 | 2509 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2510 | return; |
2511 | } | |
2512 | } | |
2513 | arp_xmit(skb); | |
2514 | } | |
2515 | ||
2516 | ||
1da177e4 LT |
2517 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2518 | { | |
c3ade5ca | 2519 | int i, vlan_id, rv; |
d3bb52b0 | 2520 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2521 | struct vlan_entry *vlan; |
c3ade5ca JV |
2522 | struct net_device *vlan_dev; |
2523 | struct flowi fl; | |
2524 | struct rtable *rt; | |
1da177e4 | 2525 | |
6b780567 MW |
2526 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2527 | if (!targets[i]) | |
5a31bec0 | 2528 | break; |
5a03cdb7 | 2529 | pr_debug("basa: target %x\n", targets[i]); |
c3ade5ca | 2530 | if (list_empty(&bond->vlan_list)) { |
5a03cdb7 | 2531 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2532 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2533 | bond->master_ip, 0); | |
2534 | continue; | |
2535 | } | |
2536 | ||
2537 | /* | |
2538 | * If VLANs are configured, we do a route lookup to | |
2539 | * determine which VLAN interface would be used, so we | |
2540 | * can tag the ARP with the proper VLAN tag. | |
2541 | */ | |
2542 | memset(&fl, 0, sizeof(fl)); | |
2543 | fl.fl4_dst = targets[i]; | |
2544 | fl.fl4_tos = RTO_ONLINK; | |
2545 | ||
ec87fd3b | 2546 | rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl); |
c3ade5ca JV |
2547 | if (rv) { |
2548 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2549 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
2550 | bond->dev->name, &fl.fl4_dst); | |
c3ade5ca JV |
2551 | } |
2552 | continue; | |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * This target is not on a VLAN | |
2557 | */ | |
2558 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2559 | ip_rt_put(rt); |
5a03cdb7 | 2560 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2561 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2562 | bond->master_ip, 0); | |
2563 | continue; | |
2564 | } | |
2565 | ||
2566 | vlan_id = 0; | |
0883beca | 2567 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2568 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2569 | if (vlan_dev == rt->u.dst.dev) { |
2570 | vlan_id = vlan->vlan_id; | |
5a03cdb7 | 2571 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2572 | vlan_dev->name, vlan_id); |
2573 | break; | |
2574 | } | |
2575 | } | |
2576 | ||
2577 | if (vlan_id) { | |
ed4b9f80 | 2578 | ip_rt_put(rt); |
c3ade5ca JV |
2579 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2580 | vlan->vlan_ip, vlan_id); | |
2581 | continue; | |
2582 | } | |
2583 | ||
2584 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2585 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2586 | bond->dev->name, &fl.fl4_dst, | |
2587 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
c3ade5ca | 2588 | } |
ed4b9f80 | 2589 | ip_rt_put(rt); |
c3ade5ca JV |
2590 | } |
2591 | } | |
2592 | ||
2593 | /* | |
2594 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2595 | * for each VLAN above us. | |
b59f9f74 JV |
2596 | * |
2597 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2598 | */ |
2599 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2600 | { | |
2601 | struct slave *slave = bond->curr_active_slave; | |
2602 | struct vlan_entry *vlan; | |
2603 | struct net_device *vlan_dev; | |
2604 | ||
a4aee5c8 JP |
2605 | pr_debug("bond_send_grat_arp: bond %s slave %s\n", |
2606 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
b59f9f74 JV |
2607 | |
2608 | if (!slave || !bond->send_grat_arp || | |
2609 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2610 | return; |
2611 | ||
b59f9f74 JV |
2612 | bond->send_grat_arp--; |
2613 | ||
c3ade5ca JV |
2614 | if (bond->master_ip) { |
2615 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2616 | bond->master_ip, 0); |
c3ade5ca JV |
2617 | } |
2618 | ||
2619 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
5c15bdec | 2620 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2621 | if (vlan->vlan_ip) { |
2622 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2623 | vlan->vlan_ip, vlan->vlan_id); | |
2624 | } | |
1da177e4 LT |
2625 | } |
2626 | } | |
2627 | ||
d3bb52b0 | 2628 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2629 | { |
2630 | int i; | |
d3bb52b0 | 2631 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2632 | |
f5b2b966 | 2633 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2634 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2635 | &sip, &tip, i, &targets[i], |
2636 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2637 | if (sip == targets[i]) { |
2638 | if (bond_has_this_ip(bond, tip)) | |
2639 | slave->last_arp_rx = jiffies; | |
2640 | return; | |
2641 | } | |
2642 | } | |
2643 | } | |
2644 | ||
2645 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2646 | { | |
2647 | struct arphdr *arp; | |
2648 | struct slave *slave; | |
2649 | struct bonding *bond; | |
2650 | unsigned char *arp_ptr; | |
d3bb52b0 | 2651 | __be32 sip, tip; |
f5b2b966 | 2652 | |
1f3c8804 AG |
2653 | if (dev->priv_flags & IFF_802_1Q_VLAN) { |
2654 | /* | |
2655 | * When using VLANS and bonding, dev and oriv_dev may be | |
2656 | * incorrect if the physical interface supports VLAN | |
2657 | * acceleration. With this change ARP validation now | |
2658 | * works for hosts only reachable on the VLAN interface. | |
2659 | */ | |
2660 | dev = vlan_dev_real_dev(dev); | |
2661 | orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif); | |
2662 | } | |
2663 | ||
f5b2b966 JV |
2664 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2665 | goto out; | |
2666 | ||
454d7c9b | 2667 | bond = netdev_priv(dev); |
f5b2b966 JV |
2668 | read_lock(&bond->lock); |
2669 | ||
5a03cdb7 | 2670 | pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", |
a4aee5c8 JP |
2671 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", |
2672 | orig_dev ? orig_dev->name : "NULL"); | |
f5b2b966 JV |
2673 | |
2674 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2675 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2676 | goto out_unlock; | |
2677 | ||
988b7050 | 2678 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2679 | goto out_unlock; |
2680 | ||
d0a92be0 | 2681 | arp = arp_hdr(skb); |
f5b2b966 JV |
2682 | if (arp->ar_hln != dev->addr_len || |
2683 | skb->pkt_type == PACKET_OTHERHOST || | |
2684 | skb->pkt_type == PACKET_LOOPBACK || | |
2685 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2686 | arp->ar_pro != htons(ETH_P_IP) || | |
2687 | arp->ar_pln != 4) | |
2688 | goto out_unlock; | |
2689 | ||
2690 | arp_ptr = (unsigned char *)(arp + 1); | |
2691 | arp_ptr += dev->addr_len; | |
2692 | memcpy(&sip, arp_ptr, 4); | |
2693 | arp_ptr += 4 + dev->addr_len; | |
2694 | memcpy(&tip, arp_ptr, 4); | |
2695 | ||
5a03cdb7 | 2696 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
a4aee5c8 JP |
2697 | bond->dev->name, slave->dev->name, slave->state, |
2698 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2699 | &sip, &tip); | |
f5b2b966 JV |
2700 | |
2701 | /* | |
2702 | * Backup slaves won't see the ARP reply, but do come through | |
2703 | * here for each ARP probe (so we swap the sip/tip to validate | |
2704 | * the probe). In a "redundant switch, common router" type of | |
2705 | * configuration, the ARP probe will (hopefully) travel from | |
2706 | * the active, through one switch, the router, then the other | |
2707 | * switch before reaching the backup. | |
2708 | */ | |
2709 | if (slave->state == BOND_STATE_ACTIVE) | |
2710 | bond_validate_arp(bond, slave, sip, tip); | |
2711 | else | |
2712 | bond_validate_arp(bond, slave, tip, sip); | |
2713 | ||
2714 | out_unlock: | |
2715 | read_unlock(&bond->lock); | |
2716 | out: | |
2717 | dev_kfree_skb(skb); | |
2718 | return NET_RX_SUCCESS; | |
2719 | } | |
2720 | ||
1da177e4 LT |
2721 | /* |
2722 | * this function is called regularly to monitor each slave's link | |
2723 | * ensuring that traffic is being sent and received when arp monitoring | |
2724 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2725 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2726 | * arp monitoring in active backup mode. | |
2727 | */ | |
1b76b316 | 2728 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2729 | { |
1b76b316 JV |
2730 | struct bonding *bond = container_of(work, struct bonding, |
2731 | arp_work.work); | |
1da177e4 LT |
2732 | struct slave *slave, *oldcurrent; |
2733 | int do_failover = 0; | |
2734 | int delta_in_ticks; | |
2735 | int i; | |
2736 | ||
2737 | read_lock(&bond->lock); | |
2738 | ||
5ce0da8f | 2739 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2740 | |
3d632c3f | 2741 | if (bond->kill_timers) |
1da177e4 | 2742 | goto out; |
1da177e4 | 2743 | |
3d632c3f | 2744 | if (bond->slave_cnt == 0) |
1da177e4 | 2745 | goto re_arm; |
1da177e4 LT |
2746 | |
2747 | read_lock(&bond->curr_slave_lock); | |
2748 | oldcurrent = bond->curr_active_slave; | |
2749 | read_unlock(&bond->curr_slave_lock); | |
2750 | ||
2751 | /* see if any of the previous devices are up now (i.e. they have | |
2752 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2753 | * the picture unless it is null. also, slave->jiffies is not needed | |
2754 | * here because we send an arp on each slave and give a slave as | |
2755 | * long as it needs to get the tx/rx within the delta. | |
2756 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2757 | * so it can wait | |
2758 | */ | |
2759 | bond_for_each_slave(bond, slave, i) { | |
2760 | if (slave->link != BOND_LINK_UP) { | |
9d21493b | 2761 | if (time_before_eq(jiffies, dev_trans_start(slave->dev) + delta_in_ticks) && |
b63bb739 | 2762 | time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) { |
1da177e4 LT |
2763 | |
2764 | slave->link = BOND_LINK_UP; | |
2765 | slave->state = BOND_STATE_ACTIVE; | |
2766 | ||
2767 | /* primary_slave has no meaning in round-robin | |
2768 | * mode. the window of a slave being up and | |
2769 | * curr_active_slave being null after enslaving | |
2770 | * is closed. | |
2771 | */ | |
2772 | if (!oldcurrent) { | |
a4aee5c8 JP |
2773 | pr_info("%s: link status definitely up for interface %s, ", |
2774 | bond->dev->name, | |
2775 | slave->dev->name); | |
1da177e4 LT |
2776 | do_failover = 1; |
2777 | } else { | |
a4aee5c8 JP |
2778 | pr_info("%s: interface %s is now up\n", |
2779 | bond->dev->name, | |
2780 | slave->dev->name); | |
1da177e4 LT |
2781 | } |
2782 | } | |
2783 | } else { | |
2784 | /* slave->link == BOND_LINK_UP */ | |
2785 | ||
2786 | /* not all switches will respond to an arp request | |
2787 | * when the source ip is 0, so don't take the link down | |
2788 | * if we don't know our ip yet | |
2789 | */ | |
9d21493b | 2790 | if (time_after_eq(jiffies, dev_trans_start(slave->dev) + 2*delta_in_ticks) || |
4b8a9239 | 2791 | (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) { |
1da177e4 LT |
2792 | |
2793 | slave->link = BOND_LINK_DOWN; | |
2794 | slave->state = BOND_STATE_BACKUP; | |
2795 | ||
3d632c3f | 2796 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2797 | slave->link_failure_count++; |
1da177e4 | 2798 | |
a4aee5c8 JP |
2799 | pr_info("%s: interface %s is now down.\n", |
2800 | bond->dev->name, | |
2801 | slave->dev->name); | |
1da177e4 | 2802 | |
3d632c3f | 2803 | if (slave == oldcurrent) |
1da177e4 | 2804 | do_failover = 1; |
1da177e4 LT |
2805 | } |
2806 | } | |
2807 | ||
2808 | /* note: if switch is in round-robin mode, all links | |
2809 | * must tx arp to ensure all links rx an arp - otherwise | |
2810 | * links may oscillate or not come up at all; if switch is | |
2811 | * in something like xor mode, there is nothing we can | |
2812 | * do - all replies will be rx'ed on same link causing slaves | |
2813 | * to be unstable during low/no traffic periods | |
2814 | */ | |
3d632c3f | 2815 | if (IS_UP(slave->dev)) |
1da177e4 | 2816 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2817 | } |
2818 | ||
2819 | if (do_failover) { | |
059fe7a5 | 2820 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2821 | |
2822 | bond_select_active_slave(bond); | |
2823 | ||
059fe7a5 | 2824 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2825 | } |
2826 | ||
2827 | re_arm: | |
1b76b316 JV |
2828 | if (bond->params.arp_interval) |
2829 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2830 | out: |
2831 | read_unlock(&bond->lock); | |
2832 | } | |
2833 | ||
2834 | /* | |
b2220cad JV |
2835 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2836 | * changes. Sets new_link in slaves to specify what action should take | |
2837 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2838 | * to link states must be committed. | |
2839 | * | |
2840 | * Called with bond->lock held for read. | |
1da177e4 | 2841 | */ |
b2220cad | 2842 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2843 | { |
1da177e4 | 2844 | struct slave *slave; |
b2220cad | 2845 | int i, commit = 0; |
1da177e4 | 2846 | |
b2220cad JV |
2847 | bond_for_each_slave(bond, slave, i) { |
2848 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2849 | |
b2220cad JV |
2850 | if (slave->link != BOND_LINK_UP) { |
2851 | if (time_before_eq(jiffies, slave_last_rx(bond, slave) + | |
2852 | delta_in_ticks)) { | |
2853 | slave->new_link = BOND_LINK_UP; | |
2854 | commit++; | |
2855 | } | |
1da177e4 | 2856 | |
b2220cad JV |
2857 | continue; |
2858 | } | |
1da177e4 | 2859 | |
b2220cad JV |
2860 | /* |
2861 | * Give slaves 2*delta after being enslaved or made | |
2862 | * active. This avoids bouncing, as the last receive | |
2863 | * times need a full ARP monitor cycle to be updated. | |
2864 | */ | |
2865 | if (!time_after_eq(jiffies, slave->jiffies + | |
2866 | 2 * delta_in_ticks)) | |
2867 | continue; | |
2868 | ||
2869 | /* | |
2870 | * Backup slave is down if: | |
2871 | * - No current_arp_slave AND | |
2872 | * - more than 3*delta since last receive AND | |
2873 | * - the bond has an IP address | |
2874 | * | |
2875 | * Note: a non-null current_arp_slave indicates | |
2876 | * the curr_active_slave went down and we are | |
2877 | * searching for a new one; under this condition | |
2878 | * we only take the curr_active_slave down - this | |
2879 | * gives each slave a chance to tx/rx traffic | |
2880 | * before being taken out | |
2881 | */ | |
2882 | if (slave->state == BOND_STATE_BACKUP && | |
2883 | !bond->current_arp_slave && | |
2884 | time_after(jiffies, slave_last_rx(bond, slave) + | |
2885 | 3 * delta_in_ticks)) { | |
2886 | slave->new_link = BOND_LINK_DOWN; | |
2887 | commit++; | |
2888 | } | |
2889 | ||
2890 | /* | |
2891 | * Active slave is down if: | |
2892 | * - more than 2*delta since transmitting OR | |
2893 | * - (more than 2*delta since receive AND | |
2894 | * the bond has an IP address) | |
2895 | */ | |
2896 | if ((slave->state == BOND_STATE_ACTIVE) && | |
9d21493b | 2897 | (time_after_eq(jiffies, dev_trans_start(slave->dev) + |
b2220cad JV |
2898 | 2 * delta_in_ticks) || |
2899 | (time_after_eq(jiffies, slave_last_rx(bond, slave) | |
2900 | + 2 * delta_in_ticks)))) { | |
2901 | slave->new_link = BOND_LINK_DOWN; | |
2902 | commit++; | |
2903 | } | |
1da177e4 LT |
2904 | } |
2905 | ||
b2220cad JV |
2906 | return commit; |
2907 | } | |
1da177e4 | 2908 | |
b2220cad JV |
2909 | /* |
2910 | * Called to commit link state changes noted by inspection step of | |
2911 | * active-backup mode ARP monitor. | |
2912 | * | |
2913 | * Called with RTNL and bond->lock for read. | |
2914 | */ | |
2915 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2916 | { | |
2917 | struct slave *slave; | |
2918 | int i; | |
1da177e4 | 2919 | |
b2220cad JV |
2920 | bond_for_each_slave(bond, slave, i) { |
2921 | switch (slave->new_link) { | |
2922 | case BOND_LINK_NOCHANGE: | |
2923 | continue; | |
ff59c456 | 2924 | |
b2220cad | 2925 | case BOND_LINK_UP: |
b9f60253 JP |
2926 | if ((!bond->curr_active_slave && |
2927 | time_before_eq(jiffies, | |
2928 | dev_trans_start(slave->dev) + | |
2929 | delta_in_ticks)) || | |
2930 | bond->curr_active_slave != slave) { | |
b2220cad | 2931 | slave->link = BOND_LINK_UP; |
b2220cad JV |
2932 | bond->current_arp_slave = NULL; |
2933 | ||
a4aee5c8 | 2934 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 2935 | bond->dev->name, slave->dev->name); |
b2220cad | 2936 | |
b9f60253 JP |
2937 | if (!bond->curr_active_slave || |
2938 | (slave == bond->primary_slave)) | |
2939 | goto do_failover; | |
1da177e4 | 2940 | |
b9f60253 | 2941 | } |
1da177e4 | 2942 | |
b9f60253 | 2943 | continue; |
1da177e4 | 2944 | |
b2220cad JV |
2945 | case BOND_LINK_DOWN: |
2946 | if (slave->link_failure_count < UINT_MAX) | |
2947 | slave->link_failure_count++; | |
2948 | ||
2949 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 2950 | bond_set_slave_inactive_flags(slave); |
b2220cad | 2951 | |
a4aee5c8 | 2952 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 2953 | bond->dev->name, slave->dev->name); |
b2220cad | 2954 | |
b9f60253 | 2955 | if (slave == bond->curr_active_slave) { |
b2220cad | 2956 | bond->current_arp_slave = NULL; |
b9f60253 | 2957 | goto do_failover; |
1da177e4 | 2958 | } |
b9f60253 JP |
2959 | |
2960 | continue; | |
b2220cad JV |
2961 | |
2962 | default: | |
a4aee5c8 | 2963 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
2964 | bond->dev->name, slave->new_link, |
2965 | slave->dev->name); | |
b9f60253 | 2966 | continue; |
1da177e4 | 2967 | } |
1da177e4 | 2968 | |
b9f60253 JP |
2969 | do_failover: |
2970 | ASSERT_RTNL(); | |
b2220cad | 2971 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 2972 | bond_select_active_slave(bond); |
b2220cad JV |
2973 | write_unlock_bh(&bond->curr_slave_lock); |
2974 | } | |
1da177e4 | 2975 | |
b2220cad JV |
2976 | bond_set_carrier(bond); |
2977 | } | |
1da177e4 | 2978 | |
b2220cad JV |
2979 | /* |
2980 | * Send ARP probes for active-backup mode ARP monitor. | |
2981 | * | |
2982 | * Called with bond->lock held for read. | |
2983 | */ | |
2984 | static void bond_ab_arp_probe(struct bonding *bond) | |
2985 | { | |
2986 | struct slave *slave; | |
2987 | int i; | |
1da177e4 | 2988 | |
b2220cad | 2989 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2990 | |
b2220cad | 2991 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
2992 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
2993 | bond->current_arp_slave->dev->name, | |
2994 | bond->curr_active_slave->dev->name); | |
1da177e4 | 2995 | |
b2220cad JV |
2996 | if (bond->curr_active_slave) { |
2997 | bond_arp_send_all(bond, bond->curr_active_slave); | |
2998 | read_unlock(&bond->curr_slave_lock); | |
2999 | return; | |
3000 | } | |
1da177e4 | 3001 | |
b2220cad | 3002 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3003 | |
b2220cad JV |
3004 | /* if we don't have a curr_active_slave, search for the next available |
3005 | * backup slave from the current_arp_slave and make it the candidate | |
3006 | * for becoming the curr_active_slave | |
3007 | */ | |
1da177e4 | 3008 | |
b2220cad JV |
3009 | if (!bond->current_arp_slave) { |
3010 | bond->current_arp_slave = bond->first_slave; | |
3011 | if (!bond->current_arp_slave) | |
3012 | return; | |
3013 | } | |
1da177e4 | 3014 | |
b2220cad | 3015 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3016 | |
b2220cad JV |
3017 | /* search for next candidate */ |
3018 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3019 | if (IS_UP(slave->dev)) { | |
3020 | slave->link = BOND_LINK_BACK; | |
3021 | bond_set_slave_active_flags(slave); | |
3022 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3023 | slave->jiffies = jiffies; |
b2220cad JV |
3024 | bond->current_arp_slave = slave; |
3025 | break; | |
1da177e4 LT |
3026 | } |
3027 | ||
b2220cad JV |
3028 | /* if the link state is up at this point, we |
3029 | * mark it down - this can happen if we have | |
3030 | * simultaneous link failures and | |
3031 | * reselect_active_interface doesn't make this | |
3032 | * one the current slave so it is still marked | |
3033 | * up when it is actually down | |
1da177e4 | 3034 | */ |
b2220cad JV |
3035 | if (slave->link == BOND_LINK_UP) { |
3036 | slave->link = BOND_LINK_DOWN; | |
3037 | if (slave->link_failure_count < UINT_MAX) | |
3038 | slave->link_failure_count++; | |
1da177e4 | 3039 | |
b2220cad JV |
3040 | bond_set_slave_inactive_flags(slave); |
3041 | ||
a4aee5c8 JP |
3042 | pr_info("%s: backup interface %s is now down.\n", |
3043 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3044 | } |
b2220cad JV |
3045 | } |
3046 | } | |
1da177e4 | 3047 | |
b2220cad JV |
3048 | void bond_activebackup_arp_mon(struct work_struct *work) |
3049 | { | |
3050 | struct bonding *bond = container_of(work, struct bonding, | |
3051 | arp_work.work); | |
3052 | int delta_in_ticks; | |
1da177e4 | 3053 | |
b2220cad | 3054 | read_lock(&bond->lock); |
1da177e4 | 3055 | |
b2220cad JV |
3056 | if (bond->kill_timers) |
3057 | goto out; | |
1da177e4 | 3058 | |
b2220cad | 3059 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3060 | |
b2220cad JV |
3061 | if (bond->slave_cnt == 0) |
3062 | goto re_arm; | |
3063 | ||
b59f9f74 JV |
3064 | if (bond->send_grat_arp) { |
3065 | read_lock(&bond->curr_slave_lock); | |
3066 | bond_send_gratuitous_arp(bond); | |
3067 | read_unlock(&bond->curr_slave_lock); | |
3068 | } | |
3069 | ||
305d552a BH |
3070 | if (bond->send_unsol_na) { |
3071 | read_lock(&bond->curr_slave_lock); | |
3072 | bond_send_unsolicited_na(bond); | |
3073 | read_unlock(&bond->curr_slave_lock); | |
3074 | } | |
3075 | ||
b2220cad JV |
3076 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3077 | read_unlock(&bond->lock); | |
3078 | rtnl_lock(); | |
3079 | read_lock(&bond->lock); | |
3080 | ||
3081 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3082 | ||
3083 | read_unlock(&bond->lock); | |
3084 | rtnl_unlock(); | |
3085 | read_lock(&bond->lock); | |
1da177e4 LT |
3086 | } |
3087 | ||
b2220cad JV |
3088 | bond_ab_arp_probe(bond); |
3089 | ||
1da177e4 | 3090 | re_arm: |
3d632c3f | 3091 | if (bond->params.arp_interval) |
1b76b316 | 3092 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3093 | out: |
3094 | read_unlock(&bond->lock); | |
3095 | } | |
3096 | ||
3097 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3098 | ||
3099 | #ifdef CONFIG_PROC_FS | |
3100 | ||
1da177e4 | 3101 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
1f78d9f9 HE |
3102 | __acquires(&dev_base_lock) |
3103 | __acquires(&bond->lock) | |
1da177e4 LT |
3104 | { |
3105 | struct bonding *bond = seq->private; | |
3106 | loff_t off = 0; | |
3107 | struct slave *slave; | |
3108 | int i; | |
3109 | ||
3110 | /* make sure the bond won't be taken away */ | |
3111 | read_lock(&dev_base_lock); | |
6603a6f2 | 3112 | read_lock(&bond->lock); |
1da177e4 | 3113 | |
3d632c3f | 3114 | if (*pos == 0) |
1da177e4 | 3115 | return SEQ_START_TOKEN; |
1da177e4 LT |
3116 | |
3117 | bond_for_each_slave(bond, slave, i) { | |
3d632c3f | 3118 | if (++off == *pos) |
1da177e4 | 3119 | return slave; |
1da177e4 LT |
3120 | } |
3121 | ||
3122 | return NULL; | |
3123 | } | |
3124 | ||
3125 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3126 | { | |
3127 | struct bonding *bond = seq->private; | |
3128 | struct slave *slave = v; | |
3129 | ||
3130 | ++*pos; | |
3d632c3f | 3131 | if (v == SEQ_START_TOKEN) |
1da177e4 | 3132 | return bond->first_slave; |
1da177e4 LT |
3133 | |
3134 | slave = slave->next; | |
3135 | ||
3136 | return (slave == bond->first_slave) ? NULL : slave; | |
3137 | } | |
3138 | ||
3139 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
1f78d9f9 HE |
3140 | __releases(&bond->lock) |
3141 | __releases(&dev_base_lock) | |
1da177e4 LT |
3142 | { |
3143 | struct bonding *bond = seq->private; | |
3144 | ||
6603a6f2 | 3145 | read_unlock(&bond->lock); |
1da177e4 LT |
3146 | read_unlock(&dev_base_lock); |
3147 | } | |
3148 | ||
3149 | static void bond_info_show_master(struct seq_file *seq) | |
3150 | { | |
3151 | struct bonding *bond = seq->private; | |
3152 | struct slave *curr; | |
4756b02f | 3153 | int i; |
1da177e4 LT |
3154 | |
3155 | read_lock(&bond->curr_slave_lock); | |
3156 | curr = bond->curr_active_slave; | |
3157 | read_unlock(&bond->curr_slave_lock); | |
3158 | ||
dd957c57 | 3159 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3160 | bond_mode_name(bond->params.mode)); |
3161 | ||
dd957c57 JV |
3162 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3163 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3164 | seq_printf(seq, " (fail_over_mac %s)", |
3165 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3166 | |
3167 | seq_printf(seq, "\n"); | |
3168 | ||
c61b75ad MW |
3169 | if (bond->params.mode == BOND_MODE_XOR || |
3170 | bond->params.mode == BOND_MODE_8023AD) { | |
3171 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3172 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3173 | bond->params.xmit_policy); | |
3174 | } | |
3175 | ||
1da177e4 | 3176 | if (USES_PRIMARY(bond->params.mode)) { |
a549952a | 3177 | seq_printf(seq, "Primary Slave: %s", |
0f418b2a MW |
3178 | (bond->primary_slave) ? |
3179 | bond->primary_slave->dev->name : "None"); | |
a549952a JP |
3180 | if (bond->primary_slave) |
3181 | seq_printf(seq, " (primary_reselect %s)", | |
3182 | pri_reselect_tbl[bond->params.primary_reselect].modename); | |
1da177e4 | 3183 | |
a549952a | 3184 | seq_printf(seq, "\nCurrently Active Slave: %s\n", |
1da177e4 LT |
3185 | (curr) ? curr->dev->name : "None"); |
3186 | } | |
3187 | ||
ff59c456 JV |
3188 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3189 | "up" : "down"); | |
1da177e4 LT |
3190 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3191 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3192 | bond->params.updelay * bond->params.miimon); | |
3193 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3194 | bond->params.downdelay * bond->params.miimon); | |
3195 | ||
4756b02f MW |
3196 | |
3197 | /* ARP information */ | |
3d632c3f SH |
3198 | if (bond->params.arp_interval > 0) { |
3199 | int printed = 0; | |
4756b02f MW |
3200 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", |
3201 | bond->params.arp_interval); | |
3202 | ||
3203 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3204 | ||
3d632c3f | 3205 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
4756b02f | 3206 | if (!bond->params.arp_targets[i]) |
5a31bec0 | 3207 | break; |
4756b02f MW |
3208 | if (printed) |
3209 | seq_printf(seq, ","); | |
8cf14e38 | 3210 | seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); |
4756b02f MW |
3211 | printed = 1; |
3212 | } | |
3213 | seq_printf(seq, "\n"); | |
3214 | } | |
3215 | ||
1da177e4 LT |
3216 | if (bond->params.mode == BOND_MODE_8023AD) { |
3217 | struct ad_info ad_info; | |
3218 | ||
3219 | seq_puts(seq, "\n802.3ad info\n"); | |
3220 | seq_printf(seq, "LACP rate: %s\n", | |
3221 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
fd989c83 JV |
3222 | seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", |
3223 | ad_select_tbl[bond->params.ad_select].modename); | |
1da177e4 LT |
3224 | |
3225 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3226 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3227 | bond->dev->name); | |
3228 | } else { | |
3229 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3230 | ||
3231 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3232 | ad_info.aggregator_id); | |
3233 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3234 | ad_info.ports); | |
3235 | seq_printf(seq, "\tActor Key: %d\n", | |
3236 | ad_info.actor_key); | |
3237 | seq_printf(seq, "\tPartner Key: %d\n", | |
3238 | ad_info.partner_key); | |
e174961c JB |
3239 | seq_printf(seq, "\tPartner Mac Address: %pM\n", |
3240 | ad_info.partner_system); | |
1da177e4 LT |
3241 | } |
3242 | } | |
3243 | } | |
3244 | ||
3d632c3f SH |
3245 | static void bond_info_show_slave(struct seq_file *seq, |
3246 | const struct slave *slave) | |
1da177e4 LT |
3247 | { |
3248 | struct bonding *bond = seq->private; | |
3249 | ||
3250 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3251 | seq_printf(seq, "MII Status: %s\n", | |
3252 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3253 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3254 | slave->link_failure_count); |
3255 | ||
e174961c | 3256 | seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); |
1da177e4 LT |
3257 | |
3258 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3259 | const struct aggregator *agg | |
3260 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3261 | ||
3d632c3f | 3262 | if (agg) |
1da177e4 LT |
3263 | seq_printf(seq, "Aggregator ID: %d\n", |
3264 | agg->aggregator_identifier); | |
3d632c3f | 3265 | else |
1da177e4 | 3266 | seq_puts(seq, "Aggregator ID: N/A\n"); |
1da177e4 LT |
3267 | } |
3268 | } | |
3269 | ||
3270 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3271 | { | |
3272 | if (v == SEQ_START_TOKEN) { | |
3273 | seq_printf(seq, "%s\n", version); | |
3274 | bond_info_show_master(seq); | |
3d632c3f | 3275 | } else |
1da177e4 | 3276 | bond_info_show_slave(seq, v); |
1da177e4 LT |
3277 | |
3278 | return 0; | |
3279 | } | |
3280 | ||
4101dec9 | 3281 | static const struct seq_operations bond_info_seq_ops = { |
1da177e4 LT |
3282 | .start = bond_info_seq_start, |
3283 | .next = bond_info_seq_next, | |
3284 | .stop = bond_info_seq_stop, | |
3285 | .show = bond_info_seq_show, | |
3286 | }; | |
3287 | ||
3288 | static int bond_info_open(struct inode *inode, struct file *file) | |
3289 | { | |
3290 | struct seq_file *seq; | |
3291 | struct proc_dir_entry *proc; | |
3292 | int res; | |
3293 | ||
3294 | res = seq_open(file, &bond_info_seq_ops); | |
3295 | if (!res) { | |
3296 | /* recover the pointer buried in proc_dir_entry data */ | |
3297 | seq = file->private_data; | |
3298 | proc = PDE(inode); | |
3299 | seq->private = proc->data; | |
3300 | } | |
3301 | ||
3302 | return res; | |
3303 | } | |
3304 | ||
d54b1fdb | 3305 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3306 | .owner = THIS_MODULE, |
3307 | .open = bond_info_open, | |
3308 | .read = seq_read, | |
3309 | .llseek = seq_lseek, | |
3310 | .release = seq_release, | |
3311 | }; | |
3312 | ||
38fc0026 | 3313 | static void bond_create_proc_entry(struct bonding *bond) |
1da177e4 LT |
3314 | { |
3315 | struct net_device *bond_dev = bond->dev; | |
ec87fd3b | 3316 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
1da177e4 | 3317 | |
ec87fd3b | 3318 | if (bn->proc_dir) { |
a95609cb | 3319 | bond->proc_entry = proc_create_data(bond_dev->name, |
ec87fd3b | 3320 | S_IRUGO, bn->proc_dir, |
a95609cb | 3321 | &bond_info_fops, bond); |
3d632c3f | 3322 | if (bond->proc_entry == NULL) |
a4aee5c8 JP |
3323 | pr_warning("Warning: Cannot create /proc/net/%s/%s\n", |
3324 | DRV_NAME, bond_dev->name); | |
3d632c3f | 3325 | else |
1da177e4 | 3326 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
1da177e4 | 3327 | } |
1da177e4 LT |
3328 | } |
3329 | ||
3330 | static void bond_remove_proc_entry(struct bonding *bond) | |
3331 | { | |
ec87fd3b EB |
3332 | struct net_device *bond_dev = bond->dev; |
3333 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); | |
3334 | ||
3335 | if (bn->proc_dir && bond->proc_entry) { | |
3336 | remove_proc_entry(bond->proc_file_name, bn->proc_dir); | |
1da177e4 LT |
3337 | memset(bond->proc_file_name, 0, IFNAMSIZ); |
3338 | bond->proc_entry = NULL; | |
3339 | } | |
3340 | } | |
3341 | ||
3342 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3343 | * Caller must hold rtnl_lock. | |
3344 | */ | |
2c8c1e72 | 3345 | static void __net_init bond_create_proc_dir(struct bond_net *bn) |
1da177e4 | 3346 | { |
ec87fd3b EB |
3347 | if (!bn->proc_dir) { |
3348 | bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); | |
3349 | if (!bn->proc_dir) | |
a4aee5c8 JP |
3350 | pr_warning("Warning: cannot create /proc/net/%s\n", |
3351 | DRV_NAME); | |
1da177e4 LT |
3352 | } |
3353 | } | |
3354 | ||
3355 | /* Destroy the bonding directory under /proc/net, if empty. | |
3356 | * Caller must hold rtnl_lock. | |
3357 | */ | |
2c8c1e72 | 3358 | static void __net_exit bond_destroy_proc_dir(struct bond_net *bn) |
1da177e4 | 3359 | { |
ec87fd3b EB |
3360 | if (bn->proc_dir) { |
3361 | remove_proc_entry(DRV_NAME, bn->net->proc_net); | |
3362 | bn->proc_dir = NULL; | |
1da177e4 LT |
3363 | } |
3364 | } | |
aee64faf JP |
3365 | |
3366 | #else /* !CONFIG_PROC_FS */ | |
3367 | ||
38fc0026 | 3368 | static void bond_create_proc_entry(struct bonding *bond) |
aee64faf JP |
3369 | { |
3370 | } | |
3371 | ||
3372 | static void bond_remove_proc_entry(struct bonding *bond) | |
3373 | { | |
3374 | } | |
3375 | ||
2c8c1e72 | 3376 | static inline void bond_create_proc_dir(struct bond_net *bn) |
aee64faf JP |
3377 | { |
3378 | } | |
3379 | ||
2c8c1e72 | 3380 | static inline void bond_destroy_proc_dir(struct bond_net *bn) |
aee64faf JP |
3381 | { |
3382 | } | |
3383 | ||
1da177e4 LT |
3384 | #endif /* CONFIG_PROC_FS */ |
3385 | ||
aee64faf | 3386 | |
1da177e4 LT |
3387 | /*-------------------------- netdev event handling --------------------------*/ |
3388 | ||
3389 | /* | |
3390 | * Change device name | |
3391 | */ | |
3392 | static int bond_event_changename(struct bonding *bond) | |
3393 | { | |
1da177e4 LT |
3394 | bond_remove_proc_entry(bond); |
3395 | bond_create_proc_entry(bond); | |
7e083840 | 3396 | |
1da177e4 LT |
3397 | return NOTIFY_DONE; |
3398 | } | |
3399 | ||
3d632c3f SH |
3400 | static int bond_master_netdev_event(unsigned long event, |
3401 | struct net_device *bond_dev) | |
1da177e4 | 3402 | { |
454d7c9b | 3403 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3404 | |
3405 | switch (event) { | |
3406 | case NETDEV_CHANGENAME: | |
3407 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3408 | default: |
3409 | break; | |
3410 | } | |
3411 | ||
3412 | return NOTIFY_DONE; | |
3413 | } | |
3414 | ||
3d632c3f SH |
3415 | static int bond_slave_netdev_event(unsigned long event, |
3416 | struct net_device *slave_dev) | |
1da177e4 LT |
3417 | { |
3418 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3419 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3420 | |
3421 | switch (event) { | |
3422 | case NETDEV_UNREGISTER: | |
3423 | if (bond_dev) { | |
1284cd3a JV |
3424 | if (bond->setup_by_slave) |
3425 | bond_release_and_destroy(bond_dev, slave_dev); | |
3426 | else | |
3427 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3428 | } |
3429 | break; | |
3430 | case NETDEV_CHANGE: | |
17d04500 JV |
3431 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3432 | struct slave *slave; | |
3433 | ||
3434 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3435 | if (slave) { | |
3436 | u16 old_speed = slave->speed; | |
3437 | u16 old_duplex = slave->duplex; | |
3438 | ||
3439 | bond_update_speed_duplex(slave); | |
3440 | ||
3441 | if (bond_is_lb(bond)) | |
3442 | break; | |
3443 | ||
3444 | if (old_speed != slave->speed) | |
3445 | bond_3ad_adapter_speed_changed(slave); | |
3446 | if (old_duplex != slave->duplex) | |
3447 | bond_3ad_adapter_duplex_changed(slave); | |
3448 | } | |
3449 | } | |
3450 | ||
1da177e4 LT |
3451 | break; |
3452 | case NETDEV_DOWN: | |
3453 | /* | |
3454 | * ... Or is it this? | |
3455 | */ | |
3456 | break; | |
3457 | case NETDEV_CHANGEMTU: | |
3458 | /* | |
3459 | * TODO: Should slaves be allowed to | |
3460 | * independently alter their MTU? For | |
3461 | * an active-backup bond, slaves need | |
3462 | * not be the same type of device, so | |
3463 | * MTUs may vary. For other modes, | |
3464 | * slaves arguably should have the | |
3465 | * same MTUs. To do this, we'd need to | |
3466 | * take over the slave's change_mtu | |
3467 | * function for the duration of their | |
3468 | * servitude. | |
3469 | */ | |
3470 | break; | |
3471 | case NETDEV_CHANGENAME: | |
3472 | /* | |
3473 | * TODO: handle changing the primary's name | |
3474 | */ | |
3475 | break; | |
8531c5ff AK |
3476 | case NETDEV_FEAT_CHANGE: |
3477 | bond_compute_features(bond); | |
3478 | break; | |
1da177e4 LT |
3479 | default: |
3480 | break; | |
3481 | } | |
3482 | ||
3483 | return NOTIFY_DONE; | |
3484 | } | |
3485 | ||
3486 | /* | |
3487 | * bond_netdev_event: handle netdev notifier chain events. | |
3488 | * | |
3489 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3490 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3491 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3492 | * dev_probe_lock). | |
3493 | */ | |
3d632c3f SH |
3494 | static int bond_netdev_event(struct notifier_block *this, |
3495 | unsigned long event, void *ptr) | |
1da177e4 LT |
3496 | { |
3497 | struct net_device *event_dev = (struct net_device *)ptr; | |
3498 | ||
5a03cdb7 | 3499 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3500 | event_dev ? event_dev->name : "None", |
3501 | event); | |
1da177e4 | 3502 | |
0b680e75 JV |
3503 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3504 | return NOTIFY_DONE; | |
3505 | ||
1da177e4 | 3506 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3507 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3508 | return bond_master_netdev_event(event, event_dev); |
3509 | } | |
3510 | ||
3511 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3512 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3513 | return bond_slave_netdev_event(event, event_dev); |
3514 | } | |
3515 | ||
3516 | return NOTIFY_DONE; | |
3517 | } | |
3518 | ||
c3ade5ca JV |
3519 | /* |
3520 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3521 | * | |
3522 | * We keep track of device IPs primarily to use as source addresses in | |
3523 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3524 | * | |
3525 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3526 | */ | |
3527 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3528 | { | |
3529 | struct in_ifaddr *ifa = ptr; | |
3530 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3531 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3532 | struct bonding *bond; |
3533 | struct vlan_entry *vlan; | |
c3ade5ca | 3534 | |
ec87fd3b | 3535 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3536 | if (bond->dev == event_dev) { |
3537 | switch (event) { | |
3538 | case NETDEV_UP: | |
3539 | bond->master_ip = ifa->ifa_local; | |
3540 | return NOTIFY_OK; | |
3541 | case NETDEV_DOWN: | |
3542 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3543 | return NOTIFY_OK; | |
3544 | default: | |
3545 | return NOTIFY_DONE; | |
3546 | } | |
3547 | } | |
3548 | ||
0883beca | 3549 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 3550 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3551 | if (vlan_dev == event_dev) { |
3552 | switch (event) { | |
3553 | case NETDEV_UP: | |
3554 | vlan->vlan_ip = ifa->ifa_local; | |
3555 | return NOTIFY_OK; | |
3556 | case NETDEV_DOWN: | |
3557 | vlan->vlan_ip = | |
3558 | bond_glean_dev_ip(vlan_dev); | |
3559 | return NOTIFY_OK; | |
3560 | default: | |
3561 | return NOTIFY_DONE; | |
3562 | } | |
3563 | } | |
3564 | } | |
3565 | } | |
3566 | return NOTIFY_DONE; | |
3567 | } | |
3568 | ||
1da177e4 LT |
3569 | static struct notifier_block bond_netdev_notifier = { |
3570 | .notifier_call = bond_netdev_event, | |
3571 | }; | |
3572 | ||
c3ade5ca JV |
3573 | static struct notifier_block bond_inetaddr_notifier = { |
3574 | .notifier_call = bond_inetaddr_event, | |
3575 | }; | |
3576 | ||
1da177e4 LT |
3577 | /*-------------------------- Packet type handling ---------------------------*/ |
3578 | ||
3579 | /* register to receive lacpdus on a bond */ | |
3580 | static void bond_register_lacpdu(struct bonding *bond) | |
3581 | { | |
3582 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3583 | ||
3584 | /* initialize packet type */ | |
3585 | pk_type->type = PKT_TYPE_LACPDU; | |
3586 | pk_type->dev = bond->dev; | |
3587 | pk_type->func = bond_3ad_lacpdu_recv; | |
3588 | ||
3589 | dev_add_pack(pk_type); | |
3590 | } | |
3591 | ||
3592 | /* unregister to receive lacpdus on a bond */ | |
3593 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3594 | { | |
3595 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3596 | } | |
3597 | ||
f5b2b966 JV |
3598 | void bond_register_arp(struct bonding *bond) |
3599 | { | |
3600 | struct packet_type *pt = &bond->arp_mon_pt; | |
3601 | ||
c4f283b1 JV |
3602 | if (pt->type) |
3603 | return; | |
3604 | ||
f5b2b966 | 3605 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3606 | pt->dev = bond->dev; |
f5b2b966 JV |
3607 | pt->func = bond_arp_rcv; |
3608 | dev_add_pack(pt); | |
3609 | } | |
3610 | ||
3611 | void bond_unregister_arp(struct bonding *bond) | |
3612 | { | |
c4f283b1 JV |
3613 | struct packet_type *pt = &bond->arp_mon_pt; |
3614 | ||
3615 | dev_remove_pack(pt); | |
3616 | pt->type = 0; | |
f5b2b966 JV |
3617 | } |
3618 | ||
169a3e66 JV |
3619 | /*---------------------------- Hashing Policies -----------------------------*/ |
3620 | ||
6f6652be JV |
3621 | /* |
3622 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3623 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3624 | */ | |
a361c83c | 3625 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3626 | { |
3627 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3628 | struct iphdr *iph = ip_hdr(skb); | |
3629 | ||
f14c4e4e | 3630 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3631 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3632 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3633 | } |
3634 | ||
d3da6831 | 3635 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3636 | } |
3637 | ||
169a3e66 | 3638 | /* |
59c51591 | 3639 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3640 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3641 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3642 | */ | |
a361c83c | 3643 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3644 | { |
3645 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3646 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3647 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3648 | int layer4_xor = 0; |
3649 | ||
f14c4e4e BH |
3650 | if (skb->protocol == htons(ETH_P_IP)) { |
3651 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3652 | (iph->protocol == IPPROTO_TCP || |
3653 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3654 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3655 | } |
3656 | return (layer4_xor ^ | |
3657 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3658 | ||
3659 | } | |
3660 | ||
d3da6831 | 3661 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3662 | } |
3663 | ||
3664 | /* | |
3665 | * Hash for the output device based upon layer 2 data | |
3666 | */ | |
a361c83c | 3667 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3668 | { |
3669 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3670 | ||
d3da6831 | 3671 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3672 | } |
3673 | ||
1da177e4 LT |
3674 | /*-------------------------- Device entry points ----------------------------*/ |
3675 | ||
3676 | static int bond_open(struct net_device *bond_dev) | |
3677 | { | |
454d7c9b | 3678 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3679 | |
3680 | bond->kill_timers = 0; | |
3681 | ||
58402054 | 3682 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3683 | /* bond_alb_initialize must be called before the timer |
3684 | * is started. | |
3685 | */ | |
3686 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3687 | /* something went wrong - fail the open operation */ | |
b473946a | 3688 | return -ENOMEM; |
1da177e4 LT |
3689 | } |
3690 | ||
1b76b316 JV |
3691 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3692 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3693 | } |
3694 | ||
3695 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3696 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3697 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3698 | } |
3699 | ||
3700 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3701 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3702 | INIT_DELAYED_WORK(&bond->arp_work, | |
3703 | bond_activebackup_arp_mon); | |
3704 | else | |
3705 | INIT_DELAYED_WORK(&bond->arp_work, | |
3706 | bond_loadbalance_arp_mon); | |
3707 | ||
3708 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3709 | if (bond->params.arp_validate) |
3710 | bond_register_arp(bond); | |
1da177e4 LT |
3711 | } |
3712 | ||
3713 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3714 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3715 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3716 | /* register to receive LACPDUs */ |
3717 | bond_register_lacpdu(bond); | |
fd989c83 | 3718 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3719 | } |
3720 | ||
3721 | return 0; | |
3722 | } | |
3723 | ||
3724 | static int bond_close(struct net_device *bond_dev) | |
3725 | { | |
454d7c9b | 3726 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3727 | |
3728 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3729 | /* Unregister the receive of LACPDUs */ | |
3730 | bond_unregister_lacpdu(bond); | |
3731 | } | |
3732 | ||
f5b2b966 JV |
3733 | if (bond->params.arp_validate) |
3734 | bond_unregister_arp(bond); | |
3735 | ||
1da177e4 LT |
3736 | write_lock_bh(&bond->lock); |
3737 | ||
b59f9f74 | 3738 | bond->send_grat_arp = 0; |
305d552a | 3739 | bond->send_unsol_na = 0; |
1da177e4 LT |
3740 | |
3741 | /* signal timers not to re-arm */ | |
3742 | bond->kill_timers = 1; | |
3743 | ||
3744 | write_unlock_bh(&bond->lock); | |
3745 | ||
1da177e4 | 3746 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3747 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3748 | } |
3749 | ||
3750 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3751 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3752 | } |
3753 | ||
3754 | switch (bond->params.mode) { | |
3755 | case BOND_MODE_8023AD: | |
1b76b316 | 3756 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3757 | break; |
3758 | case BOND_MODE_TLB: | |
3759 | case BOND_MODE_ALB: | |
1b76b316 | 3760 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3761 | break; |
3762 | default: | |
3763 | break; | |
3764 | } | |
3765 | ||
1da177e4 | 3766 | |
58402054 | 3767 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3768 | /* Must be called only after all |
3769 | * slaves have been released | |
3770 | */ | |
3771 | bond_alb_deinitialize(bond); | |
3772 | } | |
3773 | ||
3774 | return 0; | |
3775 | } | |
3776 | ||
3777 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3778 | { | |
454d7c9b | 3779 | struct bonding *bond = netdev_priv(bond_dev); |
35cfabdc | 3780 | struct net_device_stats *stats = &bond_dev->stats; |
2439f9eb | 3781 | struct net_device_stats local_stats; |
1da177e4 LT |
3782 | struct slave *slave; |
3783 | int i; | |
3784 | ||
2439f9eb | 3785 | memset(&local_stats, 0, sizeof(struct net_device_stats)); |
1da177e4 LT |
3786 | |
3787 | read_lock_bh(&bond->lock); | |
3788 | ||
3789 | bond_for_each_slave(bond, slave, i) { | |
eeda3fd6 SH |
3790 | const struct net_device_stats *sstats = dev_get_stats(slave->dev); |
3791 | ||
2439f9eb AG |
3792 | local_stats.rx_packets += sstats->rx_packets; |
3793 | local_stats.rx_bytes += sstats->rx_bytes; | |
3794 | local_stats.rx_errors += sstats->rx_errors; | |
3795 | local_stats.rx_dropped += sstats->rx_dropped; | |
3796 | ||
3797 | local_stats.tx_packets += sstats->tx_packets; | |
3798 | local_stats.tx_bytes += sstats->tx_bytes; | |
3799 | local_stats.tx_errors += sstats->tx_errors; | |
3800 | local_stats.tx_dropped += sstats->tx_dropped; | |
3801 | ||
3802 | local_stats.multicast += sstats->multicast; | |
3803 | local_stats.collisions += sstats->collisions; | |
3804 | ||
3805 | local_stats.rx_length_errors += sstats->rx_length_errors; | |
3806 | local_stats.rx_over_errors += sstats->rx_over_errors; | |
3807 | local_stats.rx_crc_errors += sstats->rx_crc_errors; | |
3808 | local_stats.rx_frame_errors += sstats->rx_frame_errors; | |
3809 | local_stats.rx_fifo_errors += sstats->rx_fifo_errors; | |
3810 | local_stats.rx_missed_errors += sstats->rx_missed_errors; | |
3811 | ||
3812 | local_stats.tx_aborted_errors += sstats->tx_aborted_errors; | |
3813 | local_stats.tx_carrier_errors += sstats->tx_carrier_errors; | |
3814 | local_stats.tx_fifo_errors += sstats->tx_fifo_errors; | |
3815 | local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3816 | local_stats.tx_window_errors += sstats->tx_window_errors; | |
3817 | } | |
3818 | ||
3819 | memcpy(stats, &local_stats, sizeof(struct net_device_stats)); | |
1da177e4 LT |
3820 | |
3821 | read_unlock_bh(&bond->lock); | |
3822 | ||
3823 | return stats; | |
3824 | } | |
3825 | ||
3826 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3827 | { | |
3828 | struct net_device *slave_dev = NULL; | |
3829 | struct ifbond k_binfo; | |
3830 | struct ifbond __user *u_binfo = NULL; | |
3831 | struct ifslave k_sinfo; | |
3832 | struct ifslave __user *u_sinfo = NULL; | |
3833 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3834 | int res = 0; |
3835 | ||
a4aee5c8 | 3836 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3837 | |
3838 | switch (cmd) { | |
1da177e4 LT |
3839 | case SIOCGMIIPHY: |
3840 | mii = if_mii(ifr); | |
3d632c3f | 3841 | if (!mii) |
1da177e4 | 3842 | return -EINVAL; |
3d632c3f | 3843 | |
1da177e4 LT |
3844 | mii->phy_id = 0; |
3845 | /* Fall Through */ | |
3846 | case SIOCGMIIREG: | |
3847 | /* | |
3848 | * We do this again just in case we were called by SIOCGMIIREG | |
3849 | * instead of SIOCGMIIPHY. | |
3850 | */ | |
3851 | mii = if_mii(ifr); | |
3d632c3f | 3852 | if (!mii) |
1da177e4 | 3853 | return -EINVAL; |
3d632c3f | 3854 | |
1da177e4 LT |
3855 | |
3856 | if (mii->reg_num == 1) { | |
454d7c9b | 3857 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3858 | mii->val_out = 0; |
6603a6f2 | 3859 | read_lock(&bond->lock); |
1da177e4 | 3860 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3861 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3862 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3863 | |
1da177e4 | 3864 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3865 | read_unlock(&bond->lock); |
1da177e4 LT |
3866 | } |
3867 | ||
3868 | return 0; | |
3869 | case BOND_INFO_QUERY_OLD: | |
3870 | case SIOCBONDINFOQUERY: | |
3871 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3872 | ||
3d632c3f | 3873 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3874 | return -EFAULT; |
1da177e4 LT |
3875 | |
3876 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3877 | if (res == 0 && |
3878 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3879 | return -EFAULT; | |
1da177e4 LT |
3880 | |
3881 | return res; | |
3882 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3883 | case SIOCBONDSLAVEINFOQUERY: | |
3884 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3885 | ||
3d632c3f | 3886 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3887 | return -EFAULT; |
1da177e4 LT |
3888 | |
3889 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3890 | if (res == 0 && |
3891 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3892 | return -EFAULT; | |
1da177e4 LT |
3893 | |
3894 | return res; | |
3895 | default: | |
3896 | /* Go on */ | |
3897 | break; | |
3898 | } | |
3899 | ||
3d632c3f | 3900 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3901 | return -EPERM; |
1da177e4 | 3902 | |
ec87fd3b | 3903 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3904 | |
a4aee5c8 | 3905 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3906 | |
3d632c3f | 3907 | if (!slave_dev) |
1da177e4 | 3908 | res = -ENODEV; |
3d632c3f | 3909 | else { |
a4aee5c8 | 3910 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3911 | switch (cmd) { |
3912 | case BOND_ENSLAVE_OLD: | |
3913 | case SIOCBONDENSLAVE: | |
3914 | res = bond_enslave(bond_dev, slave_dev); | |
3915 | break; | |
3916 | case BOND_RELEASE_OLD: | |
3917 | case SIOCBONDRELEASE: | |
3918 | res = bond_release(bond_dev, slave_dev); | |
3919 | break; | |
3920 | case BOND_SETHWADDR_OLD: | |
3921 | case SIOCBONDSETHWADDR: | |
3922 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3923 | break; | |
3924 | case BOND_CHANGE_ACTIVE_OLD: | |
3925 | case SIOCBONDCHANGEACTIVE: | |
3926 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3927 | break; | |
3928 | default: | |
3929 | res = -EOPNOTSUPP; | |
3930 | } | |
3931 | ||
3932 | dev_put(slave_dev); | |
3933 | } | |
3934 | ||
1da177e4 LT |
3935 | return res; |
3936 | } | |
3937 | ||
22bedad3 JP |
3938 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3939 | struct netdev_hw_addr_list *list, | |
3940 | int addrlen) | |
3941 | { | |
3942 | struct netdev_hw_addr *ha; | |
3943 | ||
3944 | netdev_hw_addr_list_for_each(ha, list) | |
3945 | if (!memcmp(ha->addr, addr, addrlen)) | |
3946 | return true; | |
3947 | ||
3948 | return false; | |
3949 | } | |
3950 | ||
1da177e4 LT |
3951 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3952 | { | |
454d7c9b | 3953 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 JP |
3954 | struct netdev_hw_addr *ha; |
3955 | bool found; | |
1da177e4 | 3956 | |
1da177e4 LT |
3957 | /* |
3958 | * Do promisc before checking multicast_mode | |
3959 | */ | |
3d632c3f | 3960 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
3961 | /* |
3962 | * FIXME: Need to handle the error when one of the multi-slaves | |
3963 | * encounters error. | |
3964 | */ | |
1da177e4 | 3965 | bond_set_promiscuity(bond, 1); |
1da177e4 | 3966 | |
3d632c3f SH |
3967 | |
3968 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 3969 | bond_set_promiscuity(bond, -1); |
3d632c3f | 3970 | |
1da177e4 LT |
3971 | |
3972 | /* set allmulti flag to slaves */ | |
3d632c3f | 3973 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
3974 | /* |
3975 | * FIXME: Need to handle the error when one of the multi-slaves | |
3976 | * encounters error. | |
3977 | */ | |
1da177e4 | 3978 | bond_set_allmulti(bond, 1); |
1da177e4 | 3979 | |
3d632c3f SH |
3980 | |
3981 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 3982 | bond_set_allmulti(bond, -1); |
3d632c3f | 3983 | |
1da177e4 | 3984 | |
80ee5ad2 JV |
3985 | read_lock(&bond->lock); |
3986 | ||
1da177e4 LT |
3987 | bond->flags = bond_dev->flags; |
3988 | ||
3989 | /* looking for addresses to add to slaves' mc list */ | |
22bedad3 JP |
3990 | netdev_for_each_mc_addr(ha, bond_dev) { |
3991 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3992 | bond_dev->addr_len); | |
3993 | if (!found) | |
3994 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3995 | } |
3996 | ||
3997 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3998 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3999 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
4000 | bond_dev->addr_len); | |
4001 | if (!found) | |
4002 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
4003 | } |
4004 | ||
4005 | /* save master's multicast list */ | |
22bedad3 JP |
4006 | __hw_addr_flush(&bond->mc_list); |
4007 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
4008 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 4009 | |
80ee5ad2 | 4010 | read_unlock(&bond->lock); |
1da177e4 LT |
4011 | } |
4012 | ||
00829823 SH |
4013 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
4014 | { | |
4015 | struct bonding *bond = netdev_priv(dev); | |
4016 | struct slave *slave = bond->first_slave; | |
4017 | ||
4018 | if (slave) { | |
4019 | const struct net_device_ops *slave_ops | |
4020 | = slave->dev->netdev_ops; | |
4021 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 4022 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
4023 | } |
4024 | return 0; | |
4025 | } | |
4026 | ||
1da177e4 LT |
4027 | /* |
4028 | * Change the MTU of all of a master's slaves to match the master | |
4029 | */ | |
4030 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4031 | { | |
454d7c9b | 4032 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4033 | struct slave *slave, *stop_at; |
4034 | int res = 0; | |
4035 | int i; | |
4036 | ||
5a03cdb7 | 4037 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 4038 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
4039 | |
4040 | /* Can't hold bond->lock with bh disabled here since | |
4041 | * some base drivers panic. On the other hand we can't | |
4042 | * hold bond->lock without bh disabled because we'll | |
4043 | * deadlock. The only solution is to rely on the fact | |
4044 | * that we're under rtnl_lock here, and the slaves | |
4045 | * list won't change. This doesn't solve the problem | |
4046 | * of setting the slave's MTU while it is | |
4047 | * transmitting, but the assumption is that the base | |
4048 | * driver can handle that. | |
4049 | * | |
4050 | * TODO: figure out a way to safely iterate the slaves | |
4051 | * list, but without holding a lock around the actual | |
4052 | * call to the base driver. | |
4053 | */ | |
4054 | ||
4055 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
4056 | pr_debug("s %p s->p %p c_m %p\n", |
4057 | slave, | |
4058 | slave->prev, | |
4059 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 4060 | |
1da177e4 LT |
4061 | res = dev_set_mtu(slave->dev, new_mtu); |
4062 | ||
4063 | if (res) { | |
4064 | /* If we failed to set the slave's mtu to the new value | |
4065 | * we must abort the operation even in ACTIVE_BACKUP | |
4066 | * mode, because if we allow the backup slaves to have | |
4067 | * different mtu values than the active slave we'll | |
4068 | * need to change their mtu when doing a failover. That | |
4069 | * means changing their mtu from timer context, which | |
4070 | * is probably not a good idea. | |
4071 | */ | |
5a03cdb7 | 4072 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4073 | goto unwind; |
4074 | } | |
4075 | } | |
4076 | ||
4077 | bond_dev->mtu = new_mtu; | |
4078 | ||
4079 | return 0; | |
4080 | ||
4081 | unwind: | |
4082 | /* unwind from head to the slave that failed */ | |
4083 | stop_at = slave; | |
4084 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4085 | int tmp_res; | |
4086 | ||
4087 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4088 | if (tmp_res) { | |
a4aee5c8 JP |
4089 | pr_debug("unwind err %d dev %s\n", |
4090 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4091 | } |
4092 | } | |
4093 | ||
4094 | return res; | |
4095 | } | |
4096 | ||
4097 | /* | |
4098 | * Change HW address | |
4099 | * | |
4100 | * Note that many devices must be down to change the HW address, and | |
4101 | * downing the master releases all slaves. We can make bonds full of | |
4102 | * bonding devices to test this, however. | |
4103 | */ | |
4104 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4105 | { | |
454d7c9b | 4106 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4107 | struct sockaddr *sa = addr, tmp_sa; |
4108 | struct slave *slave, *stop_at; | |
4109 | int res = 0; | |
4110 | int i; | |
4111 | ||
eb7cc59a SH |
4112 | if (bond->params.mode == BOND_MODE_ALB) |
4113 | return bond_alb_set_mac_address(bond_dev, addr); | |
4114 | ||
4115 | ||
a4aee5c8 JP |
4116 | pr_debug("bond=%p, name=%s\n", |
4117 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 4118 | |
dd957c57 | 4119 | /* |
3915c1e8 JV |
4120 | * If fail_over_mac is set to active, do nothing and return |
4121 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4122 | */ |
3915c1e8 | 4123 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4124 | return 0; |
2ab82852 | 4125 | |
3d632c3f | 4126 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 4127 | return -EADDRNOTAVAIL; |
1da177e4 LT |
4128 | |
4129 | /* Can't hold bond->lock with bh disabled here since | |
4130 | * some base drivers panic. On the other hand we can't | |
4131 | * hold bond->lock without bh disabled because we'll | |
4132 | * deadlock. The only solution is to rely on the fact | |
4133 | * that we're under rtnl_lock here, and the slaves | |
4134 | * list won't change. This doesn't solve the problem | |
4135 | * of setting the slave's hw address while it is | |
4136 | * transmitting, but the assumption is that the base | |
4137 | * driver can handle that. | |
4138 | * | |
4139 | * TODO: figure out a way to safely iterate the slaves | |
4140 | * list, but without holding a lock around the actual | |
4141 | * call to the base driver. | |
4142 | */ | |
4143 | ||
4144 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 4145 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 4146 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 4147 | |
eb7cc59a | 4148 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 4149 | res = -EOPNOTSUPP; |
5a03cdb7 | 4150 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
4151 | goto unwind; |
4152 | } | |
4153 | ||
4154 | res = dev_set_mac_address(slave->dev, addr); | |
4155 | if (res) { | |
4156 | /* TODO: consider downing the slave | |
4157 | * and retry ? | |
4158 | * User should expect communications | |
4159 | * breakage anyway until ARP finish | |
4160 | * updating, so... | |
4161 | */ | |
5a03cdb7 | 4162 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4163 | goto unwind; |
4164 | } | |
4165 | } | |
4166 | ||
4167 | /* success */ | |
4168 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4169 | return 0; | |
4170 | ||
4171 | unwind: | |
4172 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4173 | tmp_sa.sa_family = bond_dev->type; | |
4174 | ||
4175 | /* unwind from head to the slave that failed */ | |
4176 | stop_at = slave; | |
4177 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4178 | int tmp_res; | |
4179 | ||
4180 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4181 | if (tmp_res) { | |
a4aee5c8 JP |
4182 | pr_debug("unwind err %d dev %s\n", |
4183 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4184 | } |
4185 | } | |
4186 | ||
4187 | return res; | |
4188 | } | |
4189 | ||
4190 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4191 | { | |
454d7c9b | 4192 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4193 | struct slave *slave, *start_at; |
cf5f9044 | 4194 | int i, slave_no, res = 1; |
a2fd940f | 4195 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 LT |
4196 | |
4197 | read_lock(&bond->lock); | |
4198 | ||
3d632c3f | 4199 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4200 | goto out; |
cf5f9044 | 4201 | /* |
a2fd940f AG |
4202 | * Start with the curr_active_slave that joined the bond as the |
4203 | * default for sending IGMP traffic. For failover purposes one | |
4204 | * needs to maintain some consistency for the interface that will | |
4205 | * send the join/membership reports. The curr_active_slave found | |
4206 | * will send all of this type of traffic. | |
cf5f9044 | 4207 | */ |
00ae7028 | 4208 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 4209 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 4210 | |
a2fd940f AG |
4211 | read_lock(&bond->curr_slave_lock); |
4212 | slave = bond->curr_active_slave; | |
4213 | read_unlock(&bond->curr_slave_lock); | |
4214 | ||
4215 | if (!slave) | |
4216 | goto out; | |
4217 | } else { | |
4218 | /* | |
4219 | * Concurrent TX may collide on rr_tx_counter; we accept | |
4220 | * that as being rare enough not to justify using an | |
4221 | * atomic op here. | |
4222 | */ | |
4223 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
4224 | ||
4225 | bond_for_each_slave(bond, slave, i) { | |
4226 | slave_no--; | |
4227 | if (slave_no < 0) | |
4228 | break; | |
4229 | } | |
1da177e4 LT |
4230 | } |
4231 | ||
cf5f9044 | 4232 | start_at = slave; |
1da177e4 LT |
4233 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4234 | if (IS_UP(slave->dev) && | |
4235 | (slave->link == BOND_LINK_UP) && | |
4236 | (slave->state == BOND_STATE_ACTIVE)) { | |
4237 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4238 | break; |
4239 | } | |
4240 | } | |
4241 | ||
1da177e4 LT |
4242 | out: |
4243 | if (res) { | |
4244 | /* no suitable interface, frame not sent */ | |
4245 | dev_kfree_skb(skb); | |
4246 | } | |
4247 | read_unlock(&bond->lock); | |
ec634fe3 | 4248 | return NETDEV_TX_OK; |
1da177e4 LT |
4249 | } |
4250 | ||
075897ce | 4251 | |
1da177e4 LT |
4252 | /* |
4253 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4254 | * the bond has a usable interface. | |
4255 | */ | |
4256 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4257 | { | |
454d7c9b | 4258 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4259 | int res = 1; |
4260 | ||
1da177e4 LT |
4261 | read_lock(&bond->lock); |
4262 | read_lock(&bond->curr_slave_lock); | |
4263 | ||
3d632c3f | 4264 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4265 | goto out; |
1da177e4 | 4266 | |
075897ce JL |
4267 | if (!bond->curr_active_slave) |
4268 | goto out; | |
4269 | ||
075897ce JL |
4270 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4271 | ||
1da177e4 | 4272 | out: |
3d632c3f | 4273 | if (res) |
1da177e4 LT |
4274 | /* no suitable interface, frame not sent */ |
4275 | dev_kfree_skb(skb); | |
3d632c3f | 4276 | |
1da177e4 LT |
4277 | read_unlock(&bond->curr_slave_lock); |
4278 | read_unlock(&bond->lock); | |
ec634fe3 | 4279 | return NETDEV_TX_OK; |
1da177e4 LT |
4280 | } |
4281 | ||
4282 | /* | |
169a3e66 JV |
4283 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4284 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4285 | * find the next active slave. | |
1da177e4 LT |
4286 | */ |
4287 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4288 | { | |
454d7c9b | 4289 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4290 | struct slave *slave, *start_at; |
4291 | int slave_no; | |
4292 | int i; | |
4293 | int res = 1; | |
4294 | ||
4295 | read_lock(&bond->lock); | |
4296 | ||
3d632c3f | 4297 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4298 | goto out; |
1da177e4 | 4299 | |
a361c83c | 4300 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4301 | |
4302 | bond_for_each_slave(bond, slave, i) { | |
4303 | slave_no--; | |
3d632c3f | 4304 | if (slave_no < 0) |
1da177e4 | 4305 | break; |
1da177e4 LT |
4306 | } |
4307 | ||
4308 | start_at = slave; | |
4309 | ||
4310 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4311 | if (IS_UP(slave->dev) && | |
4312 | (slave->link == BOND_LINK_UP) && | |
4313 | (slave->state == BOND_STATE_ACTIVE)) { | |
4314 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4315 | break; | |
4316 | } | |
4317 | } | |
4318 | ||
4319 | out: | |
4320 | if (res) { | |
4321 | /* no suitable interface, frame not sent */ | |
4322 | dev_kfree_skb(skb); | |
4323 | } | |
4324 | read_unlock(&bond->lock); | |
ec634fe3 | 4325 | return NETDEV_TX_OK; |
1da177e4 LT |
4326 | } |
4327 | ||
4328 | /* | |
4329 | * in broadcast mode, we send everything to all usable interfaces. | |
4330 | */ | |
4331 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4332 | { | |
454d7c9b | 4333 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4334 | struct slave *slave, *start_at; |
4335 | struct net_device *tx_dev = NULL; | |
4336 | int i; | |
4337 | int res = 1; | |
4338 | ||
4339 | read_lock(&bond->lock); | |
4340 | ||
3d632c3f | 4341 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4342 | goto out; |
1da177e4 LT |
4343 | |
4344 | read_lock(&bond->curr_slave_lock); | |
4345 | start_at = bond->curr_active_slave; | |
4346 | read_unlock(&bond->curr_slave_lock); | |
4347 | ||
3d632c3f | 4348 | if (!start_at) |
1da177e4 | 4349 | goto out; |
1da177e4 LT |
4350 | |
4351 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4352 | if (IS_UP(slave->dev) && | |
4353 | (slave->link == BOND_LINK_UP) && | |
4354 | (slave->state == BOND_STATE_ACTIVE)) { | |
4355 | if (tx_dev) { | |
4356 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4357 | if (!skb2) { | |
a4aee5c8 | 4358 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4359 | bond_dev->name); |
1da177e4 LT |
4360 | continue; |
4361 | } | |
4362 | ||
4363 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4364 | if (res) { | |
4365 | dev_kfree_skb(skb2); | |
4366 | continue; | |
4367 | } | |
4368 | } | |
4369 | tx_dev = slave->dev; | |
4370 | } | |
4371 | } | |
4372 | ||
3d632c3f | 4373 | if (tx_dev) |
1da177e4 | 4374 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4375 | |
4376 | out: | |
3d632c3f | 4377 | if (res) |
1da177e4 LT |
4378 | /* no suitable interface, frame not sent */ |
4379 | dev_kfree_skb(skb); | |
3d632c3f | 4380 | |
1da177e4 LT |
4381 | /* frame sent to all suitable interfaces */ |
4382 | read_unlock(&bond->lock); | |
ec634fe3 | 4383 | return NETDEV_TX_OK; |
1da177e4 LT |
4384 | } |
4385 | ||
4386 | /*------------------------- Device initialization ---------------------------*/ | |
4387 | ||
6f6652be JV |
4388 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4389 | { | |
4390 | switch (bond->params.xmit_policy) { | |
4391 | case BOND_XMIT_POLICY_LAYER23: | |
4392 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4393 | break; | |
4394 | case BOND_XMIT_POLICY_LAYER34: | |
4395 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4396 | break; | |
4397 | case BOND_XMIT_POLICY_LAYER2: | |
4398 | default: | |
4399 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4400 | break; | |
4401 | } | |
4402 | } | |
4403 | ||
424efe9c | 4404 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 SH |
4405 | { |
4406 | const struct bonding *bond = netdev_priv(dev); | |
4407 | ||
4408 | switch (bond->params.mode) { | |
4409 | case BOND_MODE_ROUNDROBIN: | |
4410 | return bond_xmit_roundrobin(skb, dev); | |
4411 | case BOND_MODE_ACTIVEBACKUP: | |
4412 | return bond_xmit_activebackup(skb, dev); | |
4413 | case BOND_MODE_XOR: | |
4414 | return bond_xmit_xor(skb, dev); | |
4415 | case BOND_MODE_BROADCAST: | |
4416 | return bond_xmit_broadcast(skb, dev); | |
4417 | case BOND_MODE_8023AD: | |
4418 | return bond_3ad_xmit_xor(skb, dev); | |
4419 | case BOND_MODE_ALB: | |
4420 | case BOND_MODE_TLB: | |
4421 | return bond_alb_xmit(skb, dev); | |
4422 | default: | |
4423 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4424 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4425 | dev->name, bond->params.mode); | |
00829823 SH |
4426 | WARN_ON_ONCE(1); |
4427 | dev_kfree_skb(skb); | |
4428 | return NETDEV_TX_OK; | |
4429 | } | |
4430 | } | |
4431 | ||
4432 | ||
1da177e4 LT |
4433 | /* |
4434 | * set bond mode specific net device operations | |
4435 | */ | |
a77b5325 | 4436 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4437 | { |
169a3e66 JV |
4438 | struct net_device *bond_dev = bond->dev; |
4439 | ||
1da177e4 LT |
4440 | switch (mode) { |
4441 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4442 | break; |
4443 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4444 | break; |
4445 | case BOND_MODE_XOR: | |
6f6652be | 4446 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4447 | break; |
4448 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4449 | break; |
4450 | case BOND_MODE_8023AD: | |
8f903c70 | 4451 | bond_set_master_3ad_flags(bond); |
6f6652be | 4452 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4453 | break; |
1da177e4 | 4454 | case BOND_MODE_ALB: |
8f903c70 JV |
4455 | bond_set_master_alb_flags(bond); |
4456 | /* FALLTHRU */ | |
4457 | case BOND_MODE_TLB: | |
1da177e4 LT |
4458 | break; |
4459 | default: | |
4460 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4461 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4462 | bond_dev->name, mode); | |
1da177e4 LT |
4463 | break; |
4464 | } | |
4465 | } | |
4466 | ||
217df670 JV |
4467 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4468 | struct ethtool_drvinfo *drvinfo) | |
4469 | { | |
4470 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4471 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4472 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4473 | } | |
4474 | ||
7282d491 | 4475 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4476 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4477 | .get_link = ethtool_op_get_link, |
4478 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4479 | .get_sg = ethtool_op_get_sg, | |
4480 | .get_tso = ethtool_op_get_tso, | |
4481 | .get_ufo = ethtool_op_get_ufo, | |
4482 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4483 | }; |
4484 | ||
eb7cc59a | 4485 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4486 | .ndo_init = bond_init, |
9e71626c | 4487 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4488 | .ndo_open = bond_open, |
4489 | .ndo_stop = bond_close, | |
00829823 | 4490 | .ndo_start_xmit = bond_start_xmit, |
eb7cc59a SH |
4491 | .ndo_get_stats = bond_get_stats, |
4492 | .ndo_do_ioctl = bond_do_ioctl, | |
4493 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4494 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4495 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4496 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4497 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4498 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4499 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
f6dc31a8 WC |
4500 | #ifdef CONFIG_NET_POLL_CONTROLLER |
4501 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, | |
4502 | .ndo_poll_controller = bond_poll_controller, | |
4503 | #endif | |
eb7cc59a SH |
4504 | }; |
4505 | ||
9e2e61fb AW |
4506 | static void bond_destructor(struct net_device *bond_dev) |
4507 | { | |
4508 | struct bonding *bond = netdev_priv(bond_dev); | |
4509 | if (bond->wq) | |
4510 | destroy_workqueue(bond->wq); | |
4511 | free_netdev(bond_dev); | |
4512 | } | |
4513 | ||
181470fc | 4514 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4515 | { |
454d7c9b | 4516 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4517 | |
1da177e4 LT |
4518 | /* initialize rwlocks */ |
4519 | rwlock_init(&bond->lock); | |
4520 | rwlock_init(&bond->curr_slave_lock); | |
4521 | ||
d2991f75 | 4522 | bond->params = bonding_defaults; |
1da177e4 LT |
4523 | |
4524 | /* Initialize pointers */ | |
1da177e4 LT |
4525 | bond->dev = bond_dev; |
4526 | INIT_LIST_HEAD(&bond->vlan_list); | |
4527 | ||
4528 | /* Initialize the device entry points */ | |
181470fc | 4529 | ether_setup(bond_dev); |
eb7cc59a | 4530 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4531 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4532 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4533 | |
9e2e61fb | 4534 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4535 | |
4536 | /* Initialize the device options */ | |
4537 | bond_dev->tx_queue_len = 0; | |
4538 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4539 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4540 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4541 | ||
6cf3f41e JV |
4542 | if (bond->params.arp_interval) |
4543 | bond_dev->priv_flags |= IFF_MASTER_ARPMON; | |
1da177e4 LT |
4544 | |
4545 | /* At first, we block adding VLANs. That's the only way to | |
4546 | * prevent problems that occur when adding VLANs over an | |
4547 | * empty bond. The block will be removed once non-challenged | |
4548 | * slaves are enslaved. | |
4549 | */ | |
4550 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4551 | ||
932ff279 | 4552 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4553 | * transmitting */ |
4554 | bond_dev->features |= NETIF_F_LLTX; | |
4555 | ||
4556 | /* By default, we declare the bond to be fully | |
4557 | * VLAN hardware accelerated capable. Special | |
4558 | * care is taken in the various xmit functions | |
4559 | * when there are slaves that are not hw accel | |
4560 | * capable | |
4561 | */ | |
1da177e4 LT |
4562 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4563 | NETIF_F_HW_VLAN_RX | | |
4564 | NETIF_F_HW_VLAN_FILTER); | |
4565 | ||
1da177e4 LT |
4566 | } |
4567 | ||
fdaea7a9 JV |
4568 | static void bond_work_cancel_all(struct bonding *bond) |
4569 | { | |
4570 | write_lock_bh(&bond->lock); | |
4571 | bond->kill_timers = 1; | |
4572 | write_unlock_bh(&bond->lock); | |
4573 | ||
4574 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4575 | cancel_delayed_work(&bond->mii_work); | |
4576 | ||
4577 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4578 | cancel_delayed_work(&bond->arp_work); | |
4579 | ||
4580 | if (bond->params.mode == BOND_MODE_ALB && | |
4581 | delayed_work_pending(&bond->alb_work)) | |
4582 | cancel_delayed_work(&bond->alb_work); | |
4583 | ||
4584 | if (bond->params.mode == BOND_MODE_8023AD && | |
4585 | delayed_work_pending(&bond->ad_work)) | |
4586 | cancel_delayed_work(&bond->ad_work); | |
4587 | } | |
4588 | ||
c67dfb29 EB |
4589 | /* |
4590 | * Destroy a bonding device. | |
4591 | * Must be under rtnl_lock when this function is called. | |
4592 | */ | |
4593 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4594 | { |
454d7c9b | 4595 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f | 4596 | |
f6dc31a8 WC |
4597 | bond_netpoll_cleanup(bond_dev); |
4598 | ||
c67dfb29 EB |
4599 | /* Release the bonded slaves */ |
4600 | bond_release_all(bond_dev); | |
4601 | ||
a434e43f JV |
4602 | list_del(&bond->bond_list); |
4603 | ||
4604 | bond_work_cancel_all(bond); | |
4605 | ||
a434e43f | 4606 | bond_remove_proc_entry(bond); |
c67dfb29 | 4607 | |
22bedad3 | 4608 | __hw_addr_flush(&bond->mc_list); |
a434e43f JV |
4609 | } |
4610 | ||
1da177e4 LT |
4611 | /*------------------------- Module initialization ---------------------------*/ |
4612 | ||
4613 | /* | |
4614 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4615 | * number of the mode or its string name. A bit complicated because |
4616 | * some mode names are substrings of other names, and calls from sysfs | |
4617 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4618 | */ |
325dcf7a | 4619 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4620 | { |
54b87323 | 4621 | int modeint = -1, i, rv; |
a42e534f | 4622 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4623 | |
a42e534f JV |
4624 | for (p = (char *)buf; *p; p++) |
4625 | if (!(isdigit(*p) || isspace(*p))) | |
4626 | break; | |
4627 | ||
4628 | if (*p) | |
ece95f7f | 4629 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4630 | else |
54b87323 | 4631 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4632 | |
4633 | if (!rv) | |
4634 | return -1; | |
1da177e4 LT |
4635 | |
4636 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4637 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4638 | return tbl[i].mode; |
4639 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4640 | return tbl[i].mode; |
1da177e4 LT |
4641 | } |
4642 | ||
4643 | return -1; | |
4644 | } | |
4645 | ||
4646 | static int bond_check_params(struct bond_params *params) | |
4647 | { | |
a549952a | 4648 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4649 | |
1da177e4 LT |
4650 | /* |
4651 | * Convert string parameters. | |
4652 | */ | |
4653 | if (mode) { | |
4654 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4655 | if (bond_mode == -1) { | |
a4aee5c8 | 4656 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4657 | mode == NULL ? "NULL" : mode); |
4658 | return -EINVAL; | |
4659 | } | |
4660 | } | |
4661 | ||
169a3e66 JV |
4662 | if (xmit_hash_policy) { |
4663 | if ((bond_mode != BOND_MODE_XOR) && | |
4664 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4665 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4666 | bond_mode_name(bond_mode)); |
4667 | } else { | |
4668 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4669 | xmit_hashtype_tbl); | |
4670 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4671 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4672 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4673 | xmit_hash_policy); |
4674 | return -EINVAL; | |
4675 | } | |
4676 | } | |
4677 | } | |
4678 | ||
1da177e4 LT |
4679 | if (lacp_rate) { |
4680 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4681 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4682 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4683 | } else { |
4684 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4685 | if (lacp_fast == -1) { | |
a4aee5c8 | 4686 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4687 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4688 | return -EINVAL; | |
4689 | } | |
4690 | } | |
4691 | } | |
4692 | ||
fd989c83 JV |
4693 | if (ad_select) { |
4694 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4695 | if (params->ad_select == -1) { | |
a4aee5c8 | 4696 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4697 | ad_select == NULL ? "NULL" : ad_select); |
4698 | return -EINVAL; | |
4699 | } | |
4700 | ||
4701 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4702 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4703 | } |
4704 | } else { | |
4705 | params->ad_select = BOND_AD_STABLE; | |
4706 | } | |
4707 | ||
f5841306 | 4708 | if (max_bonds < 0) { |
a4aee5c8 JP |
4709 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4710 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4711 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4712 | } | |
4713 | ||
4714 | if (miimon < 0) { | |
a4aee5c8 JP |
4715 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4716 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4717 | miimon = BOND_LINK_MON_INTERV; |
4718 | } | |
4719 | ||
4720 | if (updelay < 0) { | |
a4aee5c8 JP |
4721 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4722 | updelay, INT_MAX); | |
1da177e4 LT |
4723 | updelay = 0; |
4724 | } | |
4725 | ||
4726 | if (downdelay < 0) { | |
a4aee5c8 JP |
4727 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4728 | downdelay, INT_MAX); | |
1da177e4 LT |
4729 | downdelay = 0; |
4730 | } | |
4731 | ||
4732 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4733 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4734 | use_carrier); | |
1da177e4 LT |
4735 | use_carrier = 1; |
4736 | } | |
4737 | ||
7893b249 | 4738 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
2381a55c | 4739 | pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 4740 | num_grat_arp); |
7893b249 MS |
4741 | num_grat_arp = 1; |
4742 | } | |
4743 | ||
305d552a | 4744 | if (num_unsol_na < 0 || num_unsol_na > 255) { |
2381a55c | 4745 | pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 4746 | num_unsol_na); |
305d552a BH |
4747 | num_unsol_na = 1; |
4748 | } | |
4749 | ||
1da177e4 LT |
4750 | /* reset values for 802.3ad */ |
4751 | if (bond_mode == BOND_MODE_8023AD) { | |
4752 | if (!miimon) { | |
a4aee5c8 | 4753 | 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 | 4754 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4755 | miimon = 100; |
4756 | } | |
4757 | } | |
4758 | ||
4759 | /* reset values for TLB/ALB */ | |
4760 | if ((bond_mode == BOND_MODE_TLB) || | |
4761 | (bond_mode == BOND_MODE_ALB)) { | |
4762 | if (!miimon) { | |
a4aee5c8 | 4763 | 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 | 4764 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4765 | miimon = 100; |
4766 | } | |
4767 | } | |
4768 | ||
4769 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4770 | 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", |
4771 | updelay); | |
1da177e4 LT |
4772 | } |
4773 | ||
4774 | if (!miimon) { | |
4775 | if (updelay || downdelay) { | |
4776 | /* just warn the user the up/down delay will have | |
4777 | * no effect since miimon is zero... | |
4778 | */ | |
a4aee5c8 JP |
4779 | 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", |
4780 | updelay, downdelay); | |
1da177e4 LT |
4781 | } |
4782 | } else { | |
4783 | /* don't allow arp monitoring */ | |
4784 | if (arp_interval) { | |
a4aee5c8 JP |
4785 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4786 | miimon, arp_interval); | |
1da177e4 LT |
4787 | arp_interval = 0; |
4788 | } | |
4789 | ||
4790 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4791 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4792 | updelay, miimon, | |
4793 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4794 | } |
4795 | ||
4796 | updelay /= miimon; | |
4797 | ||
4798 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4799 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4800 | downdelay, miimon, | |
4801 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4802 | } |
4803 | ||
4804 | downdelay /= miimon; | |
4805 | } | |
4806 | ||
4807 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4808 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4809 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4810 | arp_interval = BOND_LINK_ARP_INTERV; |
4811 | } | |
4812 | ||
4813 | for (arp_ip_count = 0; | |
4814 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4815 | arp_ip_count++) { | |
4816 | /* not complete check, but should be good enough to | |
4817 | catch mistakes */ | |
4818 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4819 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4820 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4821 | arp_interval = 0; |
4822 | } else { | |
d3bb52b0 | 4823 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4824 | arp_target[arp_ip_count] = ip; |
4825 | } | |
4826 | } | |
4827 | ||
4828 | if (arp_interval && !arp_ip_count) { | |
4829 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4830 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4831 | arp_interval); | |
1da177e4 LT |
4832 | arp_interval = 0; |
4833 | } | |
4834 | ||
f5b2b966 JV |
4835 | if (arp_validate) { |
4836 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4837 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4838 | return -EINVAL; |
4839 | } | |
4840 | if (!arp_interval) { | |
a4aee5c8 | 4841 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4842 | return -EINVAL; |
4843 | } | |
4844 | ||
4845 | arp_validate_value = bond_parse_parm(arp_validate, | |
4846 | arp_validate_tbl); | |
4847 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4848 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4849 | arp_validate == NULL ? "NULL" : arp_validate); |
4850 | return -EINVAL; | |
4851 | } | |
4852 | } else | |
4853 | arp_validate_value = 0; | |
4854 | ||
1da177e4 | 4855 | if (miimon) { |
a4aee5c8 | 4856 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4857 | } else if (arp_interval) { |
4858 | int i; | |
4859 | ||
a4aee5c8 JP |
4860 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4861 | arp_interval, | |
4862 | arp_validate_tbl[arp_validate_value].modename, | |
4863 | arp_ip_count); | |
1da177e4 LT |
4864 | |
4865 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4866 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4867 | |
e5e2a8fd | 4868 | pr_info("\n"); |
1da177e4 | 4869 | |
b8a9787e | 4870 | } else if (max_bonds) { |
1da177e4 LT |
4871 | /* miimon and arp_interval not set, we need one so things |
4872 | * work as expected, see bonding.txt for details | |
4873 | */ | |
a4aee5c8 | 4874 | 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 |
4875 | } |
4876 | ||
4877 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4878 | /* currently, using a primary only makes sense | |
4879 | * in active backup, TLB or ALB modes | |
4880 | */ | |
a4aee5c8 JP |
4881 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4882 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4883 | primary = NULL; |
4884 | } | |
4885 | ||
a549952a JP |
4886 | if (primary && primary_reselect) { |
4887 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4888 | pri_reselect_tbl); | |
4889 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4890 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4891 | primary_reselect == |
4892 | NULL ? "NULL" : primary_reselect); | |
4893 | return -EINVAL; | |
4894 | } | |
4895 | } else { | |
4896 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4897 | } | |
4898 | ||
3915c1e8 JV |
4899 | if (fail_over_mac) { |
4900 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4901 | fail_over_mac_tbl); | |
4902 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4903 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4904 | arp_validate == NULL ? "NULL" : arp_validate); |
4905 | return -EINVAL; | |
4906 | } | |
4907 | ||
4908 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4909 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4910 | } else { |
4911 | fail_over_mac_value = BOND_FOM_NONE; | |
4912 | } | |
dd957c57 | 4913 | |
1da177e4 LT |
4914 | /* fill params struct with the proper values */ |
4915 | params->mode = bond_mode; | |
169a3e66 | 4916 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4917 | params->miimon = miimon; |
7893b249 | 4918 | params->num_grat_arp = num_grat_arp; |
305d552a | 4919 | params->num_unsol_na = num_unsol_na; |
1da177e4 | 4920 | params->arp_interval = arp_interval; |
f5b2b966 | 4921 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4922 | params->updelay = updelay; |
4923 | params->downdelay = downdelay; | |
4924 | params->use_carrier = use_carrier; | |
4925 | params->lacp_fast = lacp_fast; | |
4926 | params->primary[0] = 0; | |
a549952a | 4927 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4928 | params->fail_over_mac = fail_over_mac_value; |
1da177e4 LT |
4929 | |
4930 | if (primary) { | |
4931 | strncpy(params->primary, primary, IFNAMSIZ); | |
4932 | params->primary[IFNAMSIZ - 1] = 0; | |
4933 | } | |
4934 | ||
4935 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4936 | ||
4937 | return 0; | |
4938 | } | |
4939 | ||
0daa2303 | 4940 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4941 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4942 | |
e8a0464c DM |
4943 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4944 | struct netdev_queue *txq, | |
4945 | void *_unused) | |
c773e847 DM |
4946 | { |
4947 | lockdep_set_class(&txq->_xmit_lock, | |
4948 | &bonding_netdev_xmit_lock_key); | |
4949 | } | |
4950 | ||
4951 | static void bond_set_lockdep_class(struct net_device *dev) | |
4952 | { | |
cf508b12 DM |
4953 | lockdep_set_class(&dev->addr_list_lock, |
4954 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4955 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4956 | } |
4957 | ||
181470fc SH |
4958 | /* |
4959 | * Called from registration process | |
4960 | */ | |
4961 | static int bond_init(struct net_device *bond_dev) | |
4962 | { | |
4963 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4964 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
181470fc SH |
4965 | |
4966 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4967 | ||
4968 | bond->wq = create_singlethread_workqueue(bond_dev->name); | |
4969 | if (!bond->wq) | |
4970 | return -ENOMEM; | |
4971 | ||
4972 | bond_set_lockdep_class(bond_dev); | |
4973 | ||
4974 | netif_carrier_off(bond_dev); | |
4975 | ||
4976 | bond_create_proc_entry(bond); | |
ec87fd3b | 4977 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4978 | |
6151b3d4 | 4979 | bond_prepare_sysfs_group(bond); |
22bedad3 JP |
4980 | |
4981 | __hw_addr_init(&bond->mc_list); | |
181470fc SH |
4982 | return 0; |
4983 | } | |
4984 | ||
88ead977 EB |
4985 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4986 | { | |
4987 | if (tb[IFLA_ADDRESS]) { | |
4988 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4989 | return -EINVAL; | |
4990 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4991 | return -EADDRNOTAVAIL; | |
4992 | } | |
4993 | return 0; | |
4994 | } | |
4995 | ||
4996 | static struct rtnl_link_ops bond_link_ops __read_mostly = { | |
4997 | .kind = "bond", | |
6639104b | 4998 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4999 | .setup = bond_setup, |
5000 | .validate = bond_validate, | |
5001 | }; | |
5002 | ||
dfe60397 | 5003 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 5004 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
5005 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
5006 | * set up our sysfs entries. | |
5007 | */ | |
ec87fd3b | 5008 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
5009 | { |
5010 | struct net_device *bond_dev; | |
5011 | int res; | |
5012 | ||
5013 | rtnl_lock(); | |
027ea041 | 5014 | |
e4b91c48 | 5015 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
181470fc | 5016 | bond_setup); |
dfe60397 | 5017 | if (!bond_dev) { |
a4aee5c8 | 5018 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
5019 | rtnl_unlock(); |
5020 | return -ENOMEM; | |
dfe60397 MW |
5021 | } |
5022 | ||
ec87fd3b | 5023 | dev_net_set(bond_dev, net); |
88ead977 EB |
5024 | bond_dev->rtnl_link_ops = &bond_link_ops; |
5025 | ||
e4b91c48 JV |
5026 | if (!name) { |
5027 | res = dev_alloc_name(bond_dev, "bond%d"); | |
5028 | if (res < 0) | |
9e2e61fb | 5029 | goto out; |
e4b91c48 JV |
5030 | } |
5031 | ||
dfe60397 | 5032 | res = register_netdevice(bond_dev); |
0daa2303 | 5033 | |
30c15ba9 | 5034 | out: |
7e083840 | 5035 | rtnl_unlock(); |
9e2e61fb AW |
5036 | if (res < 0) |
5037 | bond_destructor(bond_dev); | |
30c15ba9 | 5038 | return res; |
dfe60397 MW |
5039 | } |
5040 | ||
2c8c1e72 | 5041 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 5042 | { |
15449745 | 5043 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
5044 | |
5045 | bn->net = net; | |
5046 | INIT_LIST_HEAD(&bn->dev_list); | |
5047 | ||
ec87fd3b | 5048 | bond_create_proc_dir(bn); |
15449745 EB |
5049 | |
5050 | return 0; | |
ec87fd3b EB |
5051 | } |
5052 | ||
2c8c1e72 | 5053 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 5054 | { |
15449745 | 5055 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
5056 | |
5057 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
5058 | } |
5059 | ||
5060 | static struct pernet_operations bond_net_ops = { | |
5061 | .init = bond_net_init, | |
5062 | .exit = bond_net_exit, | |
15449745 EB |
5063 | .id = &bond_net_id, |
5064 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
5065 | }; |
5066 | ||
1da177e4 LT |
5067 | static int __init bonding_init(void) |
5068 | { | |
1da177e4 LT |
5069 | int i; |
5070 | int res; | |
5071 | ||
3d632c3f | 5072 | pr_info("%s", version); |
1da177e4 | 5073 | |
dfe60397 | 5074 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 5075 | if (res) |
dfe60397 | 5076 | goto out; |
1da177e4 | 5077 | |
15449745 | 5078 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
5079 | if (res) |
5080 | goto out; | |
027ea041 | 5081 | |
88ead977 EB |
5082 | res = rtnl_link_register(&bond_link_ops); |
5083 | if (res) | |
6639104b | 5084 | goto err_link; |
88ead977 | 5085 | |
1da177e4 | 5086 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 5087 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
5088 | if (res) |
5089 | goto err; | |
1da177e4 LT |
5090 | } |
5091 | ||
b76cdba9 MW |
5092 | res = bond_create_sysfs(); |
5093 | if (res) | |
5094 | goto err; | |
5095 | ||
1da177e4 | 5096 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5097 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5098 | bond_register_ipv6_notifier(); |
dfe60397 | 5099 | out: |
1da177e4 | 5100 | return res; |
88ead977 EB |
5101 | err: |
5102 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 5103 | err_link: |
15449745 | 5104 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 5105 | goto out; |
dfe60397 | 5106 | |
1da177e4 LT |
5107 | } |
5108 | ||
5109 | static void __exit bonding_exit(void) | |
5110 | { | |
5111 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5112 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5113 | bond_unregister_ipv6_notifier(); |
1da177e4 | 5114 | |
ae68c398 PE |
5115 | bond_destroy_sysfs(); |
5116 | ||
88ead977 | 5117 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 5118 | unregister_pernet_subsys(&bond_net_ops); |
1da177e4 LT |
5119 | } |
5120 | ||
5121 | module_init(bonding_init); | |
5122 | module_exit(bonding_exit); | |
5123 | MODULE_LICENSE("GPL"); | |
5124 | MODULE_VERSION(DRV_VERSION); | |
5125 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5126 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5127 | MODULE_ALIAS_RTNL_LINK("bond"); |