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> | |
62 | #include <linux/inetdevice.h> | |
a816c7c7 | 63 | #include <linux/igmp.h> |
1da177e4 LT |
64 | #include <linux/etherdevice.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
67 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
68 | #include <linux/smp.h> |
69 | #include <linux/if_ether.h> | |
70 | #include <net/arp.h> | |
71 | #include <linux/mii.h> | |
72 | #include <linux/ethtool.h> | |
73 | #include <linux/if_vlan.h> | |
74 | #include <linux/if_bonding.h> | |
b63bb739 | 75 | #include <linux/jiffies.h> |
e843fa50 | 76 | #include <linux/preempt.h> |
c3ade5ca | 77 | #include <net/route.h> |
457c4cbc | 78 | #include <net/net_namespace.h> |
ec87fd3b | 79 | #include <net/netns/generic.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
87 | #define BOND_LINK_MON_INTERV 0 | |
88 | #define BOND_LINK_ARP_INTERV 0 | |
89 | ||
90 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 91 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 92 | static int num_peer_notif = 1; |
1da177e4 | 93 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
94 | static int updelay; |
95 | static int downdelay; | |
1da177e4 | 96 | static int use_carrier = 1; |
3d632c3f SH |
97 | static char *mode; |
98 | static char *primary; | |
a549952a | 99 | static char *primary_reselect; |
3d632c3f | 100 | static char *lacp_rate; |
655f8919 | 101 | static int min_links; |
3d632c3f SH |
102 | static char *ad_select; |
103 | static char *xmit_hash_policy; | |
1da177e4 | 104 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
105 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
106 | static char *arp_validate; | |
107 | static char *fail_over_mac; | |
ebd8e497 | 108 | static int all_slaves_active = 0; |
d2991f75 | 109 | static struct bond_params bonding_defaults; |
c2952c31 | 110 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
1da177e4 LT |
111 | |
112 | module_param(max_bonds, int, 0); | |
113 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
114 | module_param(tx_queues, int, 0); |
115 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 | 116 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
90e62474 AG |
117 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
118 | "failover event (alias of num_unsol_na)"); | |
ad246c99 | 119 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
90e62474 AG |
120 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
121 | "failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
122 | module_param(miimon, int, 0); |
123 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
124 | module_param(updelay, int, 0); | |
125 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
126 | module_param(downdelay, int, 0); | |
2ac47660 MW |
127 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
128 | "in milliseconds"); | |
1da177e4 | 129 | module_param(use_carrier, int, 0); |
2ac47660 MW |
130 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
131 | "0 for off, 1 for on (default)"); | |
1da177e4 | 132 | module_param(mode, charp, 0); |
90e62474 | 133 | MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
2ac47660 MW |
134 | "1 for active-backup, 2 for balance-xor, " |
135 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
136 | "6 for balance-alb"); | |
1da177e4 LT |
137 | module_param(primary, charp, 0); |
138 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
139 | module_param(primary_reselect, charp, 0); |
140 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
141 | "once it comes up; " | |
142 | "0 for always (default), " | |
143 | "1 for only if speed of primary is " | |
144 | "better, " | |
145 | "2 for only on active slave " | |
146 | "failure"); | |
1da177e4 | 147 | module_param(lacp_rate, charp, 0); |
90e62474 AG |
148 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
149 | "0 for slow, 1 for fast"); | |
fd989c83 | 150 | module_param(ad_select, charp, 0); |
90e62474 AG |
151 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; " |
152 | "0 for stable (default), 1 for bandwidth, " | |
153 | "2 for count"); | |
655f8919 | 154 | module_param(min_links, int, 0); |
155 | MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); | |
156 | ||
169a3e66 | 157 | module_param(xmit_hash_policy, charp, 0); |
90e62474 AG |
158 | MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; " |
159 | "0 for layer 2 (default), 1 for layer 3+4, " | |
160 | "2 for layer 2+3"); | |
1da177e4 LT |
161 | module_param(arp_interval, int, 0); |
162 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
163 | module_param_array(arp_ip_target, charp, NULL, 0); | |
164 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 | 165 | module_param(arp_validate, charp, 0); |
90e62474 AG |
166 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
167 | "0 for none (default), 1 for active, " | |
168 | "2 for backup, 3 for all"); | |
3915c1e8 | 169 | module_param(fail_over_mac, charp, 0); |
90e62474 AG |
170 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
171 | "the same MAC; 0 for none (default), " | |
172 | "1 for active, 2 for follow"); | |
ebd8e497 AG |
173 | module_param(all_slaves_active, int, 0); |
174 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
90e62474 | 175 | "by setting active flag for all slaves; " |
ebd8e497 | 176 | "0 for never (default), 1 for always."); |
c2952c31 | 177 | module_param(resend_igmp, int, 0); |
90e62474 AG |
178 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
179 | "link failure"); | |
1da177e4 LT |
180 | |
181 | /*----------------------------- Global variables ----------------------------*/ | |
182 | ||
e843fa50 | 183 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 184 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
185 | #endif |
186 | ||
f99189b1 | 187 | int bond_net_id __read_mostly; |
1da177e4 | 188 | |
3d632c3f SH |
189 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
190 | static int arp_ip_count; | |
1da177e4 | 191 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
192 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
193 | static int lacp_fast; | |
1da177e4 | 194 | |
e97fd7c6 | 195 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
196 | { "slow", AD_LACP_SLOW}, |
197 | { "fast", AD_LACP_FAST}, | |
198 | { NULL, -1}, | |
199 | }; | |
200 | ||
e97fd7c6 | 201 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
202 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
203 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
204 | { "balance-xor", BOND_MODE_XOR}, | |
205 | { "broadcast", BOND_MODE_BROADCAST}, | |
206 | { "802.3ad", BOND_MODE_8023AD}, | |
207 | { "balance-tlb", BOND_MODE_TLB}, | |
208 | { "balance-alb", BOND_MODE_ALB}, | |
209 | { NULL, -1}, | |
210 | }; | |
211 | ||
e97fd7c6 | 212 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
213 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
214 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 215 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
216 | { NULL, -1}, |
217 | }; | |
218 | ||
e97fd7c6 | 219 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
220 | { "none", BOND_ARP_VALIDATE_NONE}, |
221 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
222 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
223 | { "all", BOND_ARP_VALIDATE_ALL}, | |
224 | { NULL, -1}, | |
225 | }; | |
226 | ||
e97fd7c6 | 227 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
228 | { "none", BOND_FOM_NONE}, |
229 | { "active", BOND_FOM_ACTIVE}, | |
230 | { "follow", BOND_FOM_FOLLOW}, | |
231 | { NULL, -1}, | |
232 | }; | |
233 | ||
a549952a JP |
234 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
235 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
236 | { "better", BOND_PRI_RESELECT_BETTER}, | |
237 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
238 | { NULL, -1}, | |
239 | }; | |
240 | ||
fd989c83 JV |
241 | struct bond_parm_tbl ad_select_tbl[] = { |
242 | { "stable", BOND_AD_STABLE}, | |
243 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
244 | { "count", BOND_AD_COUNT}, | |
245 | { NULL, -1}, | |
246 | }; | |
247 | ||
1da177e4 LT |
248 | /*-------------------------- Forward declarations ---------------------------*/ |
249 | ||
181470fc | 250 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 251 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
252 | |
253 | /*---------------------------- General routines -----------------------------*/ | |
254 | ||
bd33acc3 | 255 | const char *bond_mode_name(int mode) |
1da177e4 | 256 | { |
77afc92b HE |
257 | static const char *names[] = { |
258 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
259 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
260 | [BOND_MODE_XOR] = "load balancing (xor)", | |
261 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 262 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
263 | [BOND_MODE_TLB] = "transmit load balancing", |
264 | [BOND_MODE_ALB] = "adaptive load balancing", | |
265 | }; | |
266 | ||
267 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 268 | return "unknown"; |
77afc92b HE |
269 | |
270 | return names[mode]; | |
1da177e4 LT |
271 | } |
272 | ||
273 | /*---------------------------------- VLAN -----------------------------------*/ | |
274 | ||
275 | /** | |
276 | * bond_add_vlan - add a new vlan id on bond | |
277 | * @bond: bond that got the notification | |
278 | * @vlan_id: the vlan id to add | |
279 | * | |
280 | * Returns -ENOMEM if allocation failed. | |
281 | */ | |
282 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
283 | { | |
284 | struct vlan_entry *vlan; | |
285 | ||
5a03cdb7 | 286 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 287 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 288 | |
305d552a | 289 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 290 | if (!vlan) |
1da177e4 | 291 | return -ENOMEM; |
1da177e4 LT |
292 | |
293 | INIT_LIST_HEAD(&vlan->vlan_list); | |
294 | vlan->vlan_id = vlan_id; | |
295 | ||
296 | write_lock_bh(&bond->lock); | |
297 | ||
298 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
299 | ||
300 | write_unlock_bh(&bond->lock); | |
301 | ||
5a03cdb7 | 302 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
303 | |
304 | return 0; | |
305 | } | |
306 | ||
307 | /** | |
308 | * bond_del_vlan - delete a vlan id from bond | |
309 | * @bond: bond that got the notification | |
310 | * @vlan_id: the vlan id to delete | |
311 | * | |
312 | * returns -ENODEV if @vlan_id was not found in @bond. | |
313 | */ | |
314 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
315 | { | |
0883beca | 316 | struct vlan_entry *vlan; |
1da177e4 LT |
317 | int res = -ENODEV; |
318 | ||
5a03cdb7 | 319 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 | 320 | |
e843fa50 | 321 | block_netpoll_tx(); |
1da177e4 LT |
322 | write_lock_bh(&bond->lock); |
323 | ||
0883beca | 324 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
325 | if (vlan->vlan_id == vlan_id) { |
326 | list_del(&vlan->vlan_list); | |
327 | ||
58402054 | 328 | if (bond_is_lb(bond)) |
1da177e4 | 329 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 330 | |
a4aee5c8 JP |
331 | pr_debug("removed VLAN ID %d from bond %s\n", |
332 | vlan_id, bond->dev->name); | |
1da177e4 LT |
333 | |
334 | kfree(vlan); | |
335 | ||
1da177e4 LT |
336 | res = 0; |
337 | goto out; | |
338 | } | |
339 | } | |
340 | ||
a4aee5c8 JP |
341 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
342 | vlan_id, bond->dev->name); | |
1da177e4 LT |
343 | |
344 | out: | |
345 | write_unlock_bh(&bond->lock); | |
e843fa50 | 346 | unblock_netpoll_tx(); |
1da177e4 LT |
347 | return res; |
348 | } | |
349 | ||
1da177e4 LT |
350 | /** |
351 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
352 | * @bond: the bond we're working on | |
353 | * @curr: item we're advancing from | |
354 | * | |
355 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
356 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 357 | * |
1da177e4 LT |
358 | * Caller must hold bond->lock |
359 | */ | |
360 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
361 | { | |
362 | struct vlan_entry *next, *last; | |
363 | ||
3d632c3f | 364 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 365 | return NULL; |
1da177e4 LT |
366 | |
367 | if (!curr) { | |
368 | next = list_entry(bond->vlan_list.next, | |
369 | struct vlan_entry, vlan_list); | |
370 | } else { | |
371 | last = list_entry(bond->vlan_list.prev, | |
372 | struct vlan_entry, vlan_list); | |
373 | if (last == curr) { | |
374 | next = list_entry(bond->vlan_list.next, | |
375 | struct vlan_entry, vlan_list); | |
376 | } else { | |
377 | next = list_entry(curr->vlan_list.next, | |
378 | struct vlan_entry, vlan_list); | |
379 | } | |
380 | } | |
381 | ||
382 | return next; | |
383 | } | |
384 | ||
374eeb5a NH |
385 | #define bond_queue_mapping(skb) (*(u16 *)((skb)->cb)) |
386 | ||
1da177e4 LT |
387 | /** |
388 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 389 | * |
1da177e4 LT |
390 | * @bond: bond device that got this skb for tx. |
391 | * @skb: hw accel VLAN tagged skb to transmit | |
392 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 393 | */ |
3d632c3f SH |
394 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
395 | struct net_device *slave_dev) | |
1da177e4 | 396 | { |
8387451e | 397 | skb->dev = slave_dev; |
1da177e4 | 398 | skb->priority = 1; |
374eeb5a NH |
399 | |
400 | skb->queue_mapping = bond_queue_mapping(skb); | |
401 | ||
080e4130 | 402 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 403 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 404 | else |
f6dc31a8 | 405 | dev_queue_xmit(skb); |
1da177e4 LT |
406 | |
407 | return 0; | |
408 | } | |
409 | ||
410 | /* | |
411 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
412 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
413 | * lock because: | |
414 | * a. This operation is performed in IOCTL context, | |
415 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
416 | * c. Holding a lock with BH disabled while directly calling a base driver | |
417 | * entry point is generally a BAD idea. | |
3d632c3f | 418 | * |
1da177e4 LT |
419 | * The design of synchronization/protection for this operation in the 8021q |
420 | * module is good for one or more VLAN devices over a single physical device | |
421 | * and cannot be extended for a teaming solution like bonding, so there is a | |
422 | * potential race condition here where a net device from the vlan group might | |
423 | * be referenced (either by a base driver or the 8021q code) while it is being | |
424 | * removed from the system. However, it turns out we're not making matters | |
425 | * worse, and if it works for regular VLAN usage it will work here too. | |
426 | */ | |
427 | ||
428 | /** | |
429 | * bond_vlan_rx_register - Propagates registration to slaves | |
430 | * @bond_dev: bonding net device that got called | |
431 | * @grp: vlan group being registered | |
432 | */ | |
3d632c3f SH |
433 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
434 | struct vlan_group *grp) | |
1da177e4 | 435 | { |
454d7c9b | 436 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
437 | struct slave *slave; |
438 | int i; | |
439 | ||
a71fb881 | 440 | write_lock_bh(&bond->lock); |
1da177e4 | 441 | bond->vlgrp = grp; |
a71fb881 | 442 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
443 | |
444 | bond_for_each_slave(bond, slave, i) { | |
445 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 446 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
447 | |
448 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
449 | slave_ops->ndo_vlan_rx_register) { |
450 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
451 | } |
452 | } | |
453 | } | |
454 | ||
455 | /** | |
456 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
457 | * @bond_dev: bonding net device that got called | |
458 | * @vid: vlan id being added | |
459 | */ | |
460 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
461 | { | |
454d7c9b | 462 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
463 | struct slave *slave; |
464 | int i, res; | |
465 | ||
466 | bond_for_each_slave(bond, slave, i) { | |
467 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 468 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
469 | |
470 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
471 | slave_ops->ndo_vlan_rx_add_vid) { |
472 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
473 | } |
474 | } | |
475 | ||
476 | res = bond_add_vlan(bond, vid); | |
477 | if (res) { | |
a4aee5c8 | 478 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
479 | bond_dev->name, vid); |
480 | } | |
481 | } | |
482 | ||
483 | /** | |
484 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
485 | * @bond_dev: bonding net device that got called | |
486 | * @vid: vlan id being removed | |
487 | */ | |
488 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
489 | { | |
454d7c9b | 490 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
491 | struct slave *slave; |
492 | struct net_device *vlan_dev; | |
493 | int i, res; | |
494 | ||
495 | bond_for_each_slave(bond, slave, i) { | |
496 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 497 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
498 | |
499 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 500 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
501 | /* Save and then restore vlan_dev in the grp array, |
502 | * since the slave's driver might clear it. | |
503 | */ | |
5c15bdec | 504 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 505 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 506 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
507 | } |
508 | } | |
509 | ||
510 | res = bond_del_vlan(bond, vid); | |
511 | if (res) { | |
a4aee5c8 | 512 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
513 | bond_dev->name, vid); |
514 | } | |
515 | } | |
516 | ||
517 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
518 | { | |
519 | struct vlan_entry *vlan; | |
eb7cc59a | 520 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 521 | |
f35188fa | 522 | if (!bond->vlgrp) |
03dc2f4c | 523 | return; |
1da177e4 LT |
524 | |
525 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
526 | slave_ops->ndo_vlan_rx_register) |
527 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
528 | |
529 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 530 | !(slave_ops->ndo_vlan_rx_add_vid)) |
03dc2f4c | 531 | return; |
1da177e4 | 532 | |
eb7cc59a SH |
533 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
534 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
535 | } |
536 | ||
3d632c3f SH |
537 | static void bond_del_vlans_from_slave(struct bonding *bond, |
538 | struct net_device *slave_dev) | |
1da177e4 | 539 | { |
eb7cc59a | 540 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
541 | struct vlan_entry *vlan; |
542 | struct net_device *vlan_dev; | |
543 | ||
f35188fa | 544 | if (!bond->vlgrp) |
03dc2f4c | 545 | return; |
1da177e4 LT |
546 | |
547 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 548 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 549 | goto unreg; |
1da177e4 LT |
550 | |
551 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
f35188fa JV |
552 | if (!vlan->vlan_id) |
553 | continue; | |
1da177e4 LT |
554 | /* Save and then restore vlan_dev in the grp array, |
555 | * since the slave's driver might clear it. | |
556 | */ | |
5c15bdec | 557 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 558 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 559 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
560 | } |
561 | ||
562 | unreg: | |
563 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
564 | slave_ops->ndo_vlan_rx_register) |
565 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
566 | } |
567 | ||
568 | /*------------------------------- Link status -------------------------------*/ | |
569 | ||
ff59c456 JV |
570 | /* |
571 | * Set the carrier state for the master according to the state of its | |
572 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
573 | * do special 802.3ad magic. | |
574 | * | |
575 | * Returns zero if carrier state does not change, nonzero if it does. | |
576 | */ | |
577 | static int bond_set_carrier(struct bonding *bond) | |
578 | { | |
579 | struct slave *slave; | |
580 | int i; | |
581 | ||
582 | if (bond->slave_cnt == 0) | |
583 | goto down; | |
584 | ||
585 | if (bond->params.mode == BOND_MODE_8023AD) | |
586 | return bond_3ad_set_carrier(bond); | |
587 | ||
588 | bond_for_each_slave(bond, slave, i) { | |
589 | if (slave->link == BOND_LINK_UP) { | |
590 | if (!netif_carrier_ok(bond->dev)) { | |
591 | netif_carrier_on(bond->dev); | |
592 | return 1; | |
593 | } | |
594 | return 0; | |
595 | } | |
596 | } | |
597 | ||
598 | down: | |
599 | if (netif_carrier_ok(bond->dev)) { | |
600 | netif_carrier_off(bond->dev); | |
601 | return 1; | |
602 | } | |
603 | return 0; | |
604 | } | |
605 | ||
1da177e4 LT |
606 | /* |
607 | * Get link speed and duplex from the slave's base driver | |
608 | * using ethtool. If for some reason the call fails or the | |
609 | * values are invalid, fake speed and duplex to 100/Full | |
610 | * and return error. | |
611 | */ | |
612 | static int bond_update_speed_duplex(struct slave *slave) | |
613 | { | |
614 | struct net_device *slave_dev = slave->dev; | |
5d30530e DD |
615 | struct ethtool_cmd etool = { .cmd = ETHTOOL_GSET }; |
616 | u32 slave_speed; | |
61a44b9c | 617 | int res; |
1da177e4 LT |
618 | |
619 | /* Fake speed and duplex */ | |
620 | slave->speed = SPEED_100; | |
621 | slave->duplex = DUPLEX_FULL; | |
622 | ||
61a44b9c MW |
623 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
624 | return -1; | |
1da177e4 | 625 | |
61a44b9c MW |
626 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
627 | if (res < 0) | |
1da177e4 | 628 | return -1; |
1da177e4 | 629 | |
5d30530e | 630 | slave_speed = ethtool_cmd_speed(&etool); |
6f92c66f | 631 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
1da177e4 | 632 | return -1; |
1da177e4 LT |
633 | |
634 | switch (etool.duplex) { | |
635 | case DUPLEX_FULL: | |
636 | case DUPLEX_HALF: | |
637 | break; | |
638 | default: | |
639 | return -1; | |
640 | } | |
641 | ||
5d30530e | 642 | slave->speed = slave_speed; |
1da177e4 LT |
643 | slave->duplex = etool.duplex; |
644 | ||
645 | return 0; | |
646 | } | |
647 | ||
648 | /* | |
649 | * if <dev> supports MII link status reporting, check its link status. | |
650 | * | |
651 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 652 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
653 | * |
654 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
655 | * can't tell and just pretend it is), or 0, meaning that the link is | |
656 | * down. | |
657 | * | |
658 | * If reporting is non-zero, instead of faking link up, return -1 if | |
659 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
660 | * support them). If use_carrier is set, return whatever it says. | |
661 | * It'd be nice if there was a good way to tell if a driver supports | |
662 | * netif_carrier, but there really isn't. | |
663 | */ | |
3d632c3f SH |
664 | static int bond_check_dev_link(struct bonding *bond, |
665 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 666 | { |
eb7cc59a | 667 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 668 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
669 | struct ifreq ifr; |
670 | struct mii_ioctl_data *mii; | |
1da177e4 | 671 | |
6c988853 PG |
672 | if (!reporting && !netif_running(slave_dev)) |
673 | return 0; | |
674 | ||
eb7cc59a | 675 | if (bond->params.use_carrier) |
1da177e4 | 676 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 677 | |
29112f4e JP |
678 | /* Try to get link status using Ethtool first. */ |
679 | if (slave_dev->ethtool_ops) { | |
680 | if (slave_dev->ethtool_ops->get_link) { | |
681 | u32 link; | |
682 | ||
683 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
684 | ||
685 | return link ? BMSR_LSTATUS : 0; | |
686 | } | |
687 | } | |
688 | ||
3d632c3f | 689 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 690 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
691 | if (ioctl) { |
692 | /* TODO: set pointer to correct ioctl on a per team member */ | |
693 | /* bases to make this more efficient. that is, once */ | |
694 | /* we determine the correct ioctl, we will always */ | |
695 | /* call it and not the others for that team */ | |
696 | /* member. */ | |
697 | ||
698 | /* | |
699 | * We cannot assume that SIOCGMIIPHY will also read a | |
700 | * register; not all network drivers (e.g., e100) | |
701 | * support that. | |
702 | */ | |
703 | ||
704 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
705 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
706 | mii = if_mii(&ifr); | |
707 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
708 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
709 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
710 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
711 | } |
712 | } | |
713 | ||
1da177e4 LT |
714 | /* |
715 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 716 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
717 | * cannot report link status). If not reporting, pretend |
718 | * we're ok. | |
719 | */ | |
3d632c3f | 720 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
721 | } |
722 | ||
723 | /*----------------------------- Multicast list ------------------------------*/ | |
724 | ||
1da177e4 LT |
725 | /* |
726 | * Push the promiscuity flag down to appropriate slaves | |
727 | */ | |
7e1a1ac1 | 728 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 729 | { |
7e1a1ac1 | 730 | int err = 0; |
1da177e4 LT |
731 | if (USES_PRIMARY(bond->params.mode)) { |
732 | /* write lock already acquired */ | |
733 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
734 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
735 | inc); | |
1da177e4 LT |
736 | } |
737 | } else { | |
738 | struct slave *slave; | |
739 | int i; | |
740 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
741 | err = dev_set_promiscuity(slave->dev, inc); |
742 | if (err) | |
743 | return err; | |
1da177e4 LT |
744 | } |
745 | } | |
7e1a1ac1 | 746 | return err; |
1da177e4 LT |
747 | } |
748 | ||
749 | /* | |
750 | * Push the allmulti flag down to all slaves | |
751 | */ | |
7e1a1ac1 | 752 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 753 | { |
7e1a1ac1 | 754 | int err = 0; |
1da177e4 LT |
755 | if (USES_PRIMARY(bond->params.mode)) { |
756 | /* write lock already acquired */ | |
757 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
758 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
759 | inc); | |
1da177e4 LT |
760 | } |
761 | } else { | |
762 | struct slave *slave; | |
763 | int i; | |
764 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
765 | err = dev_set_allmulti(slave->dev, inc); |
766 | if (err) | |
767 | return err; | |
1da177e4 LT |
768 | } |
769 | } | |
7e1a1ac1 | 770 | return err; |
1da177e4 LT |
771 | } |
772 | ||
773 | /* | |
774 | * Add a Multicast address to slaves | |
775 | * according to mode | |
776 | */ | |
22bedad3 | 777 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
778 | { |
779 | if (USES_PRIMARY(bond->params.mode)) { | |
780 | /* write lock already acquired */ | |
3d632c3f | 781 | if (bond->curr_active_slave) |
22bedad3 | 782 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
783 | } else { |
784 | struct slave *slave; | |
785 | int i; | |
3d632c3f SH |
786 | |
787 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 788 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
789 | } |
790 | } | |
791 | ||
792 | /* | |
793 | * Remove a multicast address from slave | |
794 | * according to mode | |
795 | */ | |
22bedad3 | 796 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
797 | { |
798 | if (USES_PRIMARY(bond->params.mode)) { | |
799 | /* write lock already acquired */ | |
3d632c3f | 800 | if (bond->curr_active_slave) |
22bedad3 | 801 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
802 | } else { |
803 | struct slave *slave; | |
804 | int i; | |
805 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 806 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
807 | } |
808 | } | |
809 | } | |
810 | ||
a816c7c7 | 811 | |
5a37e8ca | 812 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
813 | { |
814 | struct in_device *in_dev; | |
a816c7c7 JV |
815 | |
816 | rcu_read_lock(); | |
5a37e8ca | 817 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 818 | if (in_dev) |
24912420 | 819 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
820 | rcu_read_unlock(); |
821 | } | |
822 | ||
5a37e8ca FL |
823 | /* |
824 | * Retrieve the list of registered multicast addresses for the bonding | |
825 | * device and retransmit an IGMP JOIN request to the current active | |
826 | * slave. | |
827 | */ | |
828 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
829 | { | |
830 | struct net_device *vlan_dev; | |
831 | struct vlan_entry *vlan; | |
832 | ||
833 | read_lock(&bond->lock); | |
834 | ||
835 | /* rejoin all groups on bond device */ | |
836 | __bond_resend_igmp_join_requests(bond->dev); | |
837 | ||
838 | /* rejoin all groups on vlan devices */ | |
839 | if (bond->vlgrp) { | |
840 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
841 | vlan_dev = vlan_group_get_device(bond->vlgrp, | |
842 | vlan->vlan_id); | |
843 | if (vlan_dev) | |
844 | __bond_resend_igmp_join_requests(vlan_dev); | |
845 | } | |
846 | } | |
847 | ||
c2952c31 FL |
848 | if (--bond->igmp_retrans > 0) |
849 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); | |
850 | ||
5a37e8ca FL |
851 | read_unlock(&bond->lock); |
852 | } | |
853 | ||
379b7383 | 854 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
855 | { |
856 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 857 | mcast_work.work); |
5a37e8ca FL |
858 | bond_resend_igmp_join_requests(bond); |
859 | } | |
860 | ||
1da177e4 LT |
861 | /* |
862 | * flush all members of flush->mc_list from device dev->mc_list | |
863 | */ | |
3d632c3f SH |
864 | static void bond_mc_list_flush(struct net_device *bond_dev, |
865 | struct net_device *slave_dev) | |
1da177e4 | 866 | { |
454d7c9b | 867 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 868 | struct netdev_hw_addr *ha; |
1da177e4 | 869 | |
22bedad3 JP |
870 | netdev_for_each_mc_addr(ha, bond_dev) |
871 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
872 | |
873 | if (bond->params.mode == BOND_MODE_8023AD) { | |
874 | /* del lacpdu mc addr from mc list */ | |
875 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
876 | ||
22bedad3 | 877 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
878 | } |
879 | } | |
880 | ||
881 | /*--------------------------- Active slave change ---------------------------*/ | |
882 | ||
883 | /* | |
884 | * Update the mc list and multicast-related flags for the new and | |
885 | * old active slaves (if any) according to the multicast mode, and | |
886 | * promiscuous flags unconditionally. | |
887 | */ | |
3d632c3f SH |
888 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
889 | struct slave *old_active) | |
1da177e4 | 890 | { |
22bedad3 | 891 | struct netdev_hw_addr *ha; |
1da177e4 | 892 | |
3d632c3f | 893 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
894 | /* nothing to do - mc list is already up-to-date on |
895 | * all slaves | |
896 | */ | |
897 | return; | |
1da177e4 LT |
898 | |
899 | if (old_active) { | |
3d632c3f | 900 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 901 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 902 | |
3d632c3f | 903 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 904 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 905 | |
22bedad3 JP |
906 | netdev_for_each_mc_addr(ha, bond->dev) |
907 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
908 | } |
909 | ||
910 | if (new_active) { | |
7e1a1ac1 | 911 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 912 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 913 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 914 | |
3d632c3f | 915 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 916 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 917 | |
22bedad3 JP |
918 | netdev_for_each_mc_addr(ha, bond->dev) |
919 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
920 | } |
921 | } | |
922 | ||
3915c1e8 JV |
923 | /* |
924 | * bond_do_fail_over_mac | |
925 | * | |
926 | * Perform special MAC address swapping for fail_over_mac settings | |
927 | * | |
928 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
929 | */ | |
930 | static void bond_do_fail_over_mac(struct bonding *bond, | |
931 | struct slave *new_active, | |
932 | struct slave *old_active) | |
1f78d9f9 HE |
933 | __releases(&bond->curr_slave_lock) |
934 | __releases(&bond->lock) | |
935 | __acquires(&bond->lock) | |
936 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
937 | { |
938 | u8 tmp_mac[ETH_ALEN]; | |
939 | struct sockaddr saddr; | |
940 | int rv; | |
941 | ||
942 | switch (bond->params.fail_over_mac) { | |
943 | case BOND_FOM_ACTIVE: | |
944 | if (new_active) | |
945 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
946 | new_active->dev->addr_len); | |
947 | break; | |
948 | case BOND_FOM_FOLLOW: | |
949 | /* | |
950 | * if new_active && old_active, swap them | |
951 | * if just old_active, do nothing (going to no active slave) | |
952 | * if just new_active, set new_active to bond's MAC | |
953 | */ | |
954 | if (!new_active) | |
955 | return; | |
956 | ||
957 | write_unlock_bh(&bond->curr_slave_lock); | |
958 | read_unlock(&bond->lock); | |
959 | ||
960 | if (old_active) { | |
961 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
962 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
963 | ETH_ALEN); | |
964 | saddr.sa_family = new_active->dev->type; | |
965 | } else { | |
966 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
967 | saddr.sa_family = bond->dev->type; | |
968 | } | |
969 | ||
970 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
971 | if (rv) { | |
a4aee5c8 | 972 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
973 | bond->dev->name, -rv, new_active->dev->name); |
974 | goto out; | |
975 | } | |
976 | ||
977 | if (!old_active) | |
978 | goto out; | |
979 | ||
980 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
981 | saddr.sa_family = old_active->dev->type; | |
982 | ||
983 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
984 | if (rv) | |
a4aee5c8 | 985 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
986 | bond->dev->name, -rv, new_active->dev->name); |
987 | out: | |
988 | read_lock(&bond->lock); | |
989 | write_lock_bh(&bond->curr_slave_lock); | |
990 | break; | |
991 | default: | |
a4aee5c8 | 992 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
993 | bond->dev->name, bond->params.fail_over_mac); |
994 | break; | |
995 | } | |
996 | ||
997 | } | |
998 | ||
a549952a JP |
999 | static bool bond_should_change_active(struct bonding *bond) |
1000 | { | |
1001 | struct slave *prim = bond->primary_slave; | |
1002 | struct slave *curr = bond->curr_active_slave; | |
1003 | ||
1004 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
1005 | return true; | |
1006 | if (bond->force_primary) { | |
1007 | bond->force_primary = false; | |
1008 | return true; | |
1009 | } | |
1010 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
1011 | (prim->speed < curr->speed || | |
1012 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
1013 | return false; | |
1014 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
1015 | return false; | |
1016 | return true; | |
1017 | } | |
3915c1e8 | 1018 | |
1da177e4 LT |
1019 | /** |
1020 | * find_best_interface - select the best available slave to be the active one | |
1021 | * @bond: our bonding struct | |
1022 | * | |
1023 | * Warning: Caller must hold curr_slave_lock for writing. | |
1024 | */ | |
1025 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1026 | { | |
1027 | struct slave *new_active, *old_active; | |
1028 | struct slave *bestslave = NULL; | |
1029 | int mintime = bond->params.updelay; | |
1030 | int i; | |
1031 | ||
49b4ad92 | 1032 | new_active = bond->curr_active_slave; |
1da177e4 LT |
1033 | |
1034 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1035 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1036 | new_active = bond->first_slave; |
3d632c3f | 1037 | else |
1da177e4 | 1038 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1039 | } |
1040 | ||
1da177e4 | 1041 | if ((bond->primary_slave) && |
a549952a JP |
1042 | bond->primary_slave->link == BOND_LINK_UP && |
1043 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1044 | new_active = bond->primary_slave; |
1045 | } | |
1046 | ||
1047 | /* remember where to stop iterating over the slaves */ | |
1048 | old_active = new_active; | |
1049 | ||
1050 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1051 | if (new_active->link == BOND_LINK_UP) { |
1052 | return new_active; | |
1053 | } else if (new_active->link == BOND_LINK_BACK && | |
1054 | IS_UP(new_active->dev)) { | |
1055 | /* link up, but waiting for stabilization */ | |
1056 | if (new_active->delay < mintime) { | |
1057 | mintime = new_active->delay; | |
1058 | bestslave = new_active; | |
1da177e4 LT |
1059 | } |
1060 | } | |
1061 | } | |
1062 | ||
1063 | return bestslave; | |
1064 | } | |
1065 | ||
ad246c99 BH |
1066 | static bool bond_should_notify_peers(struct bonding *bond) |
1067 | { | |
1068 | struct slave *slave = bond->curr_active_slave; | |
1069 | ||
1070 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1071 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1072 | ||
1073 | if (!slave || !bond->send_peer_notif || | |
1074 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1075 | return false; | |
1076 | ||
1077 | bond->send_peer_notif--; | |
1078 | return true; | |
1079 | } | |
1080 | ||
1da177e4 LT |
1081 | /** |
1082 | * change_active_interface - change the active slave into the specified one | |
1083 | * @bond: our bonding struct | |
1084 | * @new: the new slave to make the active one | |
1085 | * | |
1086 | * Set the new slave to the bond's settings and unset them on the old | |
1087 | * curr_active_slave. | |
1088 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1089 | * | |
1090 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1091 | * because it is apparently the best available slave we have, even though its | |
1092 | * updelay hasn't timed out yet. | |
1093 | * | |
3915c1e8 JV |
1094 | * If new_active is not NULL, caller must hold bond->lock for read and |
1095 | * curr_slave_lock for write_bh. | |
1da177e4 | 1096 | */ |
a77b5325 | 1097 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1098 | { |
1099 | struct slave *old_active = bond->curr_active_slave; | |
1100 | ||
3d632c3f | 1101 | if (old_active == new_active) |
1da177e4 | 1102 | return; |
1da177e4 LT |
1103 | |
1104 | if (new_active) { | |
b2220cad JV |
1105 | new_active->jiffies = jiffies; |
1106 | ||
1da177e4 LT |
1107 | if (new_active->link == BOND_LINK_BACK) { |
1108 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1109 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1110 | bond->dev->name, new_active->dev->name, | |
1111 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1112 | } |
1113 | ||
1114 | new_active->delay = 0; | |
1115 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1116 | |
3d632c3f | 1117 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1118 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1119 | |
58402054 | 1120 | if (bond_is_lb(bond)) |
1da177e4 | 1121 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1122 | } else { |
1123 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1124 | pr_info("%s: making interface %s the new active one.\n", |
1125 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1126 | } |
1127 | } | |
1128 | } | |
1129 | ||
3d632c3f | 1130 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1131 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1132 | |
58402054 | 1133 | if (bond_is_lb(bond)) { |
1da177e4 | 1134 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1135 | if (old_active) |
1136 | bond_set_slave_inactive_flags(old_active); | |
1137 | if (new_active) | |
1138 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1139 | } else { |
1140 | bond->curr_active_slave = new_active; | |
1141 | } | |
c3ade5ca JV |
1142 | |
1143 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1144 | if (old_active) |
c3ade5ca | 1145 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1146 | |
1147 | if (new_active) { | |
ad246c99 BH |
1148 | bool should_notify_peers = false; |
1149 | ||
c3ade5ca | 1150 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1151 | |
709f8a45 OG |
1152 | if (bond->params.fail_over_mac) |
1153 | bond_do_fail_over_mac(bond, new_active, | |
1154 | old_active); | |
3915c1e8 | 1155 | |
ad246c99 BH |
1156 | if (netif_running(bond->dev)) { |
1157 | bond->send_peer_notif = | |
1158 | bond->params.num_peer_notif; | |
1159 | should_notify_peers = | |
1160 | bond_should_notify_peers(bond); | |
1161 | } | |
1162 | ||
01f3109d OG |
1163 | write_unlock_bh(&bond->curr_slave_lock); |
1164 | read_unlock(&bond->lock); | |
1165 | ||
75c78500 | 1166 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1167 | if (should_notify_peers) |
1168 | netdev_bonding_change(bond->dev, | |
1169 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1170 | |
1171 | read_lock(&bond->lock); | |
1172 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1173 | } |
c3ade5ca | 1174 | } |
a2fd940f | 1175 | |
5a37e8ca | 1176 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1177 | * all were sent on curr_active_slave. |
1178 | * resend only if bond is brought up with the affected | |
1179 | * bonding modes and the retransmission is enabled */ | |
1180 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1181 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1182 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1183 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1184 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1185 | } |
1da177e4 LT |
1186 | } |
1187 | ||
1188 | /** | |
1189 | * bond_select_active_slave - select a new active slave, if needed | |
1190 | * @bond: our bonding struct | |
1191 | * | |
3d632c3f | 1192 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1193 | * - The old curr_active_slave has been released or lost its link. |
1194 | * - The primary_slave has got its link back. | |
1195 | * - A slave has got its link back and there's no old curr_active_slave. | |
1196 | * | |
3915c1e8 | 1197 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1198 | */ |
a77b5325 | 1199 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1200 | { |
1201 | struct slave *best_slave; | |
ff59c456 | 1202 | int rv; |
1da177e4 LT |
1203 | |
1204 | best_slave = bond_find_best_slave(bond); | |
1205 | if (best_slave != bond->curr_active_slave) { | |
1206 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1207 | rv = bond_set_carrier(bond); |
1208 | if (!rv) | |
1209 | return; | |
1210 | ||
1211 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1212 | pr_info("%s: first active interface up!\n", |
1213 | bond->dev->name); | |
ff59c456 | 1214 | } else { |
a4aee5c8 JP |
1215 | pr_info("%s: now running without any active interface !\n", |
1216 | bond->dev->name); | |
ff59c456 | 1217 | } |
1da177e4 LT |
1218 | } |
1219 | } | |
1220 | ||
1221 | /*--------------------------- slave list handling ---------------------------*/ | |
1222 | ||
1223 | /* | |
1224 | * This function attaches the slave to the end of list. | |
1225 | * | |
1226 | * bond->lock held for writing by caller. | |
1227 | */ | |
1228 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1229 | { | |
1230 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1231 | new_slave->next = new_slave; | |
1232 | new_slave->prev = new_slave; | |
1233 | bond->first_slave = new_slave; | |
1234 | } else { | |
1235 | new_slave->next = bond->first_slave; | |
1236 | new_slave->prev = bond->first_slave->prev; | |
1237 | new_slave->next->prev = new_slave; | |
1238 | new_slave->prev->next = new_slave; | |
1239 | } | |
1240 | ||
1241 | bond->slave_cnt++; | |
1242 | } | |
1243 | ||
1244 | /* | |
1245 | * This function detaches the slave from the list. | |
1246 | * WARNING: no check is made to verify if the slave effectively | |
1247 | * belongs to <bond>. | |
1248 | * Nothing is freed on return, structures are just unchained. | |
1249 | * If any slave pointer in bond was pointing to <slave>, | |
1250 | * it should be changed by the calling function. | |
1251 | * | |
1252 | * bond->lock held for writing by caller. | |
1253 | */ | |
1254 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1255 | { | |
3d632c3f | 1256 | if (slave->next) |
1da177e4 | 1257 | slave->next->prev = slave->prev; |
1da177e4 | 1258 | |
3d632c3f | 1259 | if (slave->prev) |
1da177e4 | 1260 | slave->prev->next = slave->next; |
1da177e4 LT |
1261 | |
1262 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1263 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1264 | bond->first_slave = slave->next; | |
1265 | } else { | |
1266 | bond->first_slave = NULL; /* slave was the last one */ | |
1267 | } | |
1268 | } | |
1269 | ||
1270 | slave->next = NULL; | |
1271 | slave->prev = NULL; | |
1272 | bond->slave_cnt--; | |
1273 | } | |
1274 | ||
f6dc31a8 | 1275 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1276 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1277 | { |
8a8efa22 AW |
1278 | struct netpoll *np; |
1279 | int err = 0; | |
f6dc31a8 | 1280 | |
8a8efa22 AW |
1281 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1282 | err = -ENOMEM; | |
1283 | if (!np) | |
1284 | goto out; | |
1285 | ||
1286 | np->dev = slave->dev; | |
cefa9993 | 1287 | strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ); |
8a8efa22 AW |
1288 | err = __netpoll_setup(np); |
1289 | if (err) { | |
1290 | kfree(np); | |
1291 | goto out; | |
f6dc31a8 | 1292 | } |
8a8efa22 AW |
1293 | slave->np = np; |
1294 | out: | |
1295 | return err; | |
1296 | } | |
1297 | static inline void slave_disable_netpoll(struct slave *slave) | |
1298 | { | |
1299 | struct netpoll *np = slave->np; | |
1300 | ||
1301 | if (!np) | |
1302 | return; | |
1303 | ||
1304 | slave->np = NULL; | |
1305 | synchronize_rcu_bh(); | |
1306 | __netpoll_cleanup(np); | |
1307 | kfree(np); | |
1308 | } | |
1309 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1310 | { | |
1311 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1312 | return false; | |
1313 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1314 | return false; | |
1315 | return true; | |
f6dc31a8 WC |
1316 | } |
1317 | ||
1318 | static void bond_poll_controller(struct net_device *bond_dev) | |
1319 | { | |
8a8efa22 AW |
1320 | } |
1321 | ||
1322 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1323 | { | |
c2355e1a NH |
1324 | struct slave *slave; |
1325 | int i; | |
1326 | ||
8a8efa22 AW |
1327 | bond_for_each_slave(bond, slave, i) |
1328 | if (IS_UP(slave->dev)) | |
1329 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1330 | } |
f6dc31a8 WC |
1331 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1332 | { | |
1333 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1334 | |
1335 | read_lock(&bond->lock); | |
1336 | __bond_netpoll_cleanup(bond); | |
1337 | read_unlock(&bond->lock); | |
1338 | } | |
1339 | ||
1340 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1341 | { | |
1342 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1343 | struct slave *slave; |
8a8efa22 | 1344 | int i, err = 0; |
f6dc31a8 WC |
1345 | |
1346 | read_lock(&bond->lock); | |
f6dc31a8 | 1347 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1348 | err = slave_enable_netpoll(slave); |
1349 | if (err) { | |
1350 | __bond_netpoll_cleanup(bond); | |
1351 | break; | |
f6dc31a8 WC |
1352 | } |
1353 | } | |
1354 | read_unlock(&bond->lock); | |
8a8efa22 | 1355 | return err; |
f6dc31a8 WC |
1356 | } |
1357 | ||
8a8efa22 AW |
1358 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1359 | { | |
1360 | return bond->dev->npinfo; | |
1361 | } | |
f6dc31a8 | 1362 | |
8a8efa22 AW |
1363 | #else |
1364 | static inline int slave_enable_netpoll(struct slave *slave) | |
1365 | { | |
1366 | return 0; | |
1367 | } | |
1368 | static inline void slave_disable_netpoll(struct slave *slave) | |
1369 | { | |
1370 | } | |
f6dc31a8 WC |
1371 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1372 | { | |
1373 | } | |
f6dc31a8 WC |
1374 | #endif |
1375 | ||
1da177e4 LT |
1376 | /*---------------------------------- IOCTL ----------------------------------*/ |
1377 | ||
4ad072c9 AB |
1378 | static int bond_sethwaddr(struct net_device *bond_dev, |
1379 | struct net_device *slave_dev) | |
1da177e4 | 1380 | { |
5a03cdb7 HE |
1381 | pr_debug("bond_dev=%p\n", bond_dev); |
1382 | pr_debug("slave_dev=%p\n", slave_dev); | |
1383 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1384 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1385 | return 0; | |
1386 | } | |
1387 | ||
b2a103e6 | 1388 | static u32 bond_fix_features(struct net_device *dev, u32 features) |
8531c5ff | 1389 | { |
8531c5ff | 1390 | struct slave *slave; |
b2a103e6 MM |
1391 | struct bonding *bond = netdev_priv(dev); |
1392 | u32 mask; | |
8e3babcd | 1393 | int i; |
8531c5ff | 1394 | |
b2a103e6 | 1395 | read_lock(&bond->lock); |
b63365a2 | 1396 | |
b2a103e6 MM |
1397 | if (!bond->first_slave) { |
1398 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1399 | features |= NETIF_F_VLAN_CHALLENGED; | |
1400 | goto out; | |
1401 | } | |
b63365a2 | 1402 | |
b2a103e6 | 1403 | mask = features; |
b63365a2 | 1404 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1405 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1406 | |
54ef3137 | 1407 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1408 | features = netdev_increment_features(features, |
1409 | slave->dev->features, | |
b2a103e6 MM |
1410 | mask); |
1411 | } | |
1412 | ||
1413 | out: | |
1414 | read_unlock(&bond->lock); | |
1415 | return features; | |
1416 | } | |
1417 | ||
62f2a3a4 MM |
1418 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1419 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1420 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1421 | |
1422 | static void bond_compute_features(struct bonding *bond) | |
1423 | { | |
1424 | struct slave *slave; | |
1425 | struct net_device *bond_dev = bond->dev; | |
1426 | u32 vlan_features = BOND_VLAN_FEATURES; | |
1427 | unsigned short max_hard_header_len = ETH_HLEN; | |
1428 | int i; | |
1429 | ||
1430 | read_lock(&bond->lock); | |
1431 | ||
1432 | if (!bond->first_slave) | |
1433 | goto done; | |
1434 | ||
1435 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1436 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1437 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1438 | ||
54ef3137 JV |
1439 | if (slave->dev->hard_header_len > max_hard_header_len) |
1440 | max_hard_header_len = slave->dev->hard_header_len; | |
1441 | } | |
8531c5ff | 1442 | |
b63365a2 | 1443 | done: |
b2a103e6 | 1444 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1445 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff | 1446 | |
b2a103e6 MM |
1447 | read_unlock(&bond->lock); |
1448 | ||
1449 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1450 | } |
1451 | ||
872254dd MS |
1452 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1453 | struct net_device *slave_dev) | |
1454 | { | |
454d7c9b | 1455 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1456 | |
00829823 | 1457 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1458 | |
1459 | bond_dev->type = slave_dev->type; | |
1460 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1461 | bond_dev->addr_len = slave_dev->addr_len; | |
1462 | ||
1463 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1464 | slave_dev->addr_len); | |
d90a162a | 1465 | bond->setup_by_slave = 1; |
872254dd MS |
1466 | } |
1467 | ||
5b2c4dd2 | 1468 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1469 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1470 | */ |
1471 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1472 | struct slave *slave, |
1473 | struct bonding *bond) | |
5b2c4dd2 | 1474 | { |
2d7011ca | 1475 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1476 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1477 | skb->pkt_type != PACKET_BROADCAST && |
1478 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1479 | return false; |
5b2c4dd2 JP |
1480 | return true; |
1481 | } | |
1482 | return false; | |
1483 | } | |
1484 | ||
8a4eb573 | 1485 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1486 | { |
8a4eb573 | 1487 | struct sk_buff *skb = *pskb; |
f1c1775a | 1488 | struct slave *slave; |
0bd80dad | 1489 | struct bonding *bond; |
5b2c4dd2 | 1490 | |
8a4eb573 JP |
1491 | skb = skb_share_check(skb, GFP_ATOMIC); |
1492 | if (unlikely(!skb)) | |
1493 | return RX_HANDLER_CONSUMED; | |
1494 | ||
1495 | *pskb = skb; | |
5b2c4dd2 | 1496 | |
35d48903 JP |
1497 | slave = bond_slave_get_rcu(skb->dev); |
1498 | bond = slave->bond; | |
0bd80dad JP |
1499 | |
1500 | if (bond->params.arp_interval) | |
f1c1775a | 1501 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1502 | |
3aba891d JP |
1503 | if (bond->recv_probe) { |
1504 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); | |
1505 | ||
1506 | if (likely(nskb)) { | |
1507 | bond->recv_probe(nskb, bond, slave); | |
1508 | dev_kfree_skb(nskb); | |
1509 | } | |
1510 | } | |
1511 | ||
0bd80dad | 1512 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1513 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1514 | } |
1515 | ||
35d48903 | 1516 | skb->dev = bond->dev; |
5b2c4dd2 | 1517 | |
0bd80dad | 1518 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1519 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1520 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1521 | |
541ac7c9 CG |
1522 | if (unlikely(skb_cow_head(skb, |
1523 | skb->data - skb_mac_header(skb)))) { | |
1524 | kfree_skb(skb); | |
8a4eb573 | 1525 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1526 | } |
35d48903 | 1527 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1528 | } |
1529 | ||
8a4eb573 | 1530 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1531 | } |
1532 | ||
1da177e4 | 1533 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1534 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1535 | { |
454d7c9b | 1536 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1537 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1538 | struct slave *new_slave = NULL; |
22bedad3 | 1539 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1540 | struct sockaddr addr; |
1541 | int link_reporting; | |
1da177e4 LT |
1542 | int res = 0; |
1543 | ||
552709d5 | 1544 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1545 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1546 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1547 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1548 | } |
1549 | ||
1da177e4 LT |
1550 | /* already enslaved */ |
1551 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1552 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1553 | return -EBUSY; |
1554 | } | |
1555 | ||
1556 | /* vlan challenged mutual exclusion */ | |
1557 | /* no need to lock since we're protected by rtnl_lock */ | |
1558 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1559 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
f35188fa | 1560 | if (bond->vlgrp) { |
a4aee5c8 JP |
1561 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1562 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1563 | return -EPERM; |
1564 | } else { | |
a4aee5c8 JP |
1565 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1566 | bond_dev->name, slave_dev->name, | |
1567 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1568 | } |
1569 | } else { | |
5a03cdb7 | 1570 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1571 | } |
1572 | ||
217df670 JV |
1573 | /* |
1574 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1575 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1576 | * the current ifenslave will set the interface down prior to |
1577 | * enslaving it; the old ifenslave will not. | |
1578 | */ | |
1579 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1580 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1581 | slave_dev->name); |
1582 | res = -EPERM; | |
1583 | goto err_undo_flags; | |
1584 | } | |
1da177e4 | 1585 | |
872254dd MS |
1586 | /* set bonding device ether type by slave - bonding netdevices are |
1587 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1588 | * there is a need to override some of the type dependent attribs/funcs. | |
1589 | * | |
1590 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1591 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1592 | */ | |
1593 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1594 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1595 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1596 | bond_dev->name, |
1597 | bond_dev->type, slave_dev->type); | |
75c78500 | 1598 | |
3ca5b404 JP |
1599 | res = netdev_bonding_change(bond_dev, |
1600 | NETDEV_PRE_TYPE_CHANGE); | |
1601 | res = notifier_to_errno(res); | |
1602 | if (res) { | |
1603 | pr_err("%s: refused to change device type\n", | |
1604 | bond_dev->name); | |
1605 | res = -EBUSY; | |
1606 | goto err_undo_flags; | |
1607 | } | |
75c78500 | 1608 | |
32a806c1 | 1609 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1610 | dev_uc_flush(bond_dev); |
22bedad3 | 1611 | dev_mc_flush(bond_dev); |
32a806c1 | 1612 | |
e36b9d16 MS |
1613 | if (slave_dev->type != ARPHRD_ETHER) |
1614 | bond_setup_by_slave(bond_dev, slave_dev); | |
1615 | else | |
1616 | ether_setup(bond_dev); | |
75c78500 | 1617 | |
93d9b7d7 JP |
1618 | netdev_bonding_change(bond_dev, |
1619 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1620 | } |
872254dd | 1621 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1622 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1623 | slave_dev->name, | |
1624 | slave_dev->type, bond_dev->type); | |
1625 | res = -EINVAL; | |
1626 | goto err_undo_flags; | |
872254dd MS |
1627 | } |
1628 | ||
eb7cc59a | 1629 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1630 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1631 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1632 | bond_dev->name); | |
3915c1e8 JV |
1633 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1634 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1635 | 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", |
1636 | bond_dev->name); | |
2ab82852 MS |
1637 | res = -EOPNOTSUPP; |
1638 | goto err_undo_flags; | |
1639 | } | |
1da177e4 LT |
1640 | } |
1641 | ||
8d8fc29d AW |
1642 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1643 | ||
c20811a7 JP |
1644 | /* If this is the first slave, then we need to set the master's hardware |
1645 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1646 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1647 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1648 | slave_dev->addr_len); | |
1649 | ||
1650 | ||
243cb4e5 | 1651 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1652 | if (!new_slave) { |
1653 | res = -ENOMEM; | |
1654 | goto err_undo_flags; | |
1655 | } | |
1656 | ||
bb1d9123 AG |
1657 | /* |
1658 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1659 | * is set via sysfs or module option if desired. | |
1660 | */ | |
1661 | new_slave->queue_id = 0; | |
1662 | ||
b15ba0fb JP |
1663 | /* Save slave's original mtu and then set it to match the bond */ |
1664 | new_slave->original_mtu = slave_dev->mtu; | |
1665 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1666 | if (res) { | |
1667 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1668 | goto err_free; | |
1669 | } | |
1670 | ||
217df670 JV |
1671 | /* |
1672 | * Save slave's original ("permanent") mac address for modes | |
1673 | * that need it, and for restoring it upon release, and then | |
1674 | * set it to the master's address | |
1675 | */ | |
1676 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1677 | |
dd957c57 | 1678 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1679 | /* |
1680 | * Set slave to master's mac address. The application already | |
1681 | * set the master's mac address to that of the first slave | |
1682 | */ | |
1683 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1684 | addr.sa_family = slave_dev->type; | |
1685 | res = dev_set_mac_address(slave_dev, &addr); | |
1686 | if (res) { | |
5a03cdb7 | 1687 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1688 | goto err_restore_mtu; |
2ab82852 | 1689 | } |
217df670 | 1690 | } |
1da177e4 | 1691 | |
1765a575 | 1692 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1693 | if (res) { |
1765a575 | 1694 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1695 | goto err_restore_mac; |
c2edacf8 | 1696 | } |
5b2c4dd2 | 1697 | |
217df670 JV |
1698 | /* open the slave since the application closed it */ |
1699 | res = dev_open(slave_dev); | |
1700 | if (res) { | |
3d632c3f | 1701 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1702 | goto err_unset_master; |
1da177e4 LT |
1703 | } |
1704 | ||
35d48903 | 1705 | new_slave->bond = bond; |
1da177e4 | 1706 | new_slave->dev = slave_dev; |
0b680e75 | 1707 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1708 | |
58402054 | 1709 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1710 | /* bond_alb_init_slave() must be called before all other stages since |
1711 | * it might fail and we do not want to have to undo everything | |
1712 | */ | |
1713 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1714 | if (res) |
569f0c4d | 1715 | goto err_close; |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1719 | * master's promisc (and mc) settings only if it becomes the | |
1720 | * curr_active_slave, and that is taken care of later when calling | |
1721 | * bond_change_active() | |
1722 | */ | |
1723 | if (!USES_PRIMARY(bond->params.mode)) { | |
1724 | /* set promiscuity level to new slave */ | |
1725 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1726 | res = dev_set_promiscuity(slave_dev, 1); |
1727 | if (res) | |
1728 | goto err_close; | |
1da177e4 LT |
1729 | } |
1730 | ||
1731 | /* set allmulti level to new slave */ | |
1732 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1733 | res = dev_set_allmulti(slave_dev, 1); |
1734 | if (res) | |
1735 | goto err_close; | |
1da177e4 LT |
1736 | } |
1737 | ||
b9e40857 | 1738 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1739 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1740 | netdev_for_each_mc_addr(ha, bond_dev) |
1741 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1742 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1743 | } |
1744 | ||
1745 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1746 | /* add lacpdu mc addr to mc list */ | |
1747 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1748 | ||
22bedad3 | 1749 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1750 | } |
1751 | ||
1752 | bond_add_vlans_on_slave(bond, slave_dev); | |
1753 | ||
1754 | write_lock_bh(&bond->lock); | |
1755 | ||
1756 | bond_attach_slave(bond, new_slave); | |
1757 | ||
1758 | new_slave->delay = 0; | |
1759 | new_slave->link_failure_count = 0; | |
1760 | ||
3915c1e8 JV |
1761 | write_unlock_bh(&bond->lock); |
1762 | ||
b2a103e6 MM |
1763 | bond_compute_features(bond); |
1764 | ||
3915c1e8 JV |
1765 | read_lock(&bond->lock); |
1766 | ||
f5b2b966 JV |
1767 | new_slave->last_arp_rx = jiffies; |
1768 | ||
1da177e4 LT |
1769 | if (bond->params.miimon && !bond->params.use_carrier) { |
1770 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1771 | ||
1772 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1773 | /* | |
1774 | * miimon is set but a bonded network driver | |
1775 | * does not support ETHTOOL/MII and | |
1776 | * arp_interval is not set. Note: if | |
1777 | * use_carrier is enabled, we will never go | |
1778 | * here (because netif_carrier is always | |
1779 | * supported); thus, we don't need to change | |
1780 | * the messages for netif_carrier. | |
1781 | */ | |
a4aee5c8 | 1782 | 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 | 1783 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1784 | } else if (link_reporting == -1) { |
1785 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1786 | 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", |
1787 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1788 | } |
1789 | } | |
1790 | ||
1791 | /* check for initial state */ | |
1792 | if (!bond->params.miimon || | |
1793 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1794 | if (bond->params.updelay) { | |
a4aee5c8 | 1795 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1796 | new_slave->link = BOND_LINK_BACK; |
1797 | new_slave->delay = bond->params.updelay; | |
1798 | } else { | |
a4aee5c8 | 1799 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1800 | new_slave->link = BOND_LINK_UP; |
1801 | } | |
1802 | new_slave->jiffies = jiffies; | |
1803 | } else { | |
a4aee5c8 | 1804 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1805 | new_slave->link = BOND_LINK_DOWN; |
1806 | } | |
1807 | ||
1808 | if (bond_update_speed_duplex(new_slave) && | |
1809 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1810 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1811 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1812 | |
1813 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1814 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1815 | bond_dev->name); | |
1da177e4 LT |
1816 | } |
1817 | } | |
1818 | ||
1819 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1820 | /* if there is a primary slave, remember it */ | |
a549952a | 1821 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1822 | bond->primary_slave = new_slave; |
a549952a JP |
1823 | bond->force_primary = true; |
1824 | } | |
1da177e4 LT |
1825 | } |
1826 | ||
3915c1e8 JV |
1827 | write_lock_bh(&bond->curr_slave_lock); |
1828 | ||
1da177e4 LT |
1829 | switch (bond->params.mode) { |
1830 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1831 | bond_set_slave_inactive_flags(new_slave); |
1832 | bond_select_active_slave(bond); | |
1da177e4 LT |
1833 | break; |
1834 | case BOND_MODE_8023AD: | |
1835 | /* in 802.3ad mode, the internal mechanism | |
1836 | * will activate the slaves in the selected | |
1837 | * aggregator | |
1838 | */ | |
1839 | bond_set_slave_inactive_flags(new_slave); | |
1840 | /* if this is the first slave */ | |
1841 | if (bond->slave_cnt == 1) { | |
1842 | SLAVE_AD_INFO(new_slave).id = 1; | |
1843 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1844 | * can be called only after the mac address of the bond is set | |
1845 | */ | |
56d00c67 | 1846 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1847 | } else { |
1848 | SLAVE_AD_INFO(new_slave).id = | |
1849 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1850 | } | |
1851 | ||
1852 | bond_3ad_bind_slave(new_slave); | |
1853 | break; | |
1854 | case BOND_MODE_TLB: | |
1855 | case BOND_MODE_ALB: | |
e30bc066 | 1856 | bond_set_active_slave(new_slave); |
059fe7a5 | 1857 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1858 | bond_select_active_slave(bond); |
1da177e4 LT |
1859 | break; |
1860 | default: | |
5a03cdb7 | 1861 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1862 | |
1863 | /* always active in trunk mode */ | |
e30bc066 | 1864 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1865 | |
1866 | /* In trunking mode there is little meaning to curr_active_slave | |
1867 | * anyway (it holds no special properties of the bond device), | |
1868 | * so we can change it without calling change_active_interface() | |
1869 | */ | |
3d632c3f | 1870 | if (!bond->curr_active_slave) |
1da177e4 | 1871 | bond->curr_active_slave = new_slave; |
3d632c3f | 1872 | |
1da177e4 LT |
1873 | break; |
1874 | } /* switch(bond_mode) */ | |
1875 | ||
3915c1e8 JV |
1876 | write_unlock_bh(&bond->curr_slave_lock); |
1877 | ||
ff59c456 JV |
1878 | bond_set_carrier(bond); |
1879 | ||
f6dc31a8 | 1880 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1881 | slave_dev->npinfo = bond_netpoll_info(bond); |
1882 | if (slave_dev->npinfo) { | |
1883 | if (slave_enable_netpoll(new_slave)) { | |
1884 | read_unlock(&bond->lock); | |
1885 | pr_info("Error, %s: master_dev is using netpoll, " | |
1886 | "but new slave device does not support netpoll.\n", | |
1887 | bond_dev->name); | |
1888 | res = -EBUSY; | |
1889 | goto err_close; | |
1890 | } | |
f6dc31a8 WC |
1891 | } |
1892 | #endif | |
8a8efa22 | 1893 | |
3915c1e8 | 1894 | read_unlock(&bond->lock); |
1da177e4 | 1895 | |
b76cdba9 MW |
1896 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1897 | if (res) | |
569f0c4d | 1898 | goto err_close; |
b76cdba9 | 1899 | |
35d48903 JP |
1900 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1901 | new_slave); | |
1902 | if (res) { | |
1903 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1904 | goto err_dest_symlinks; | |
1905 | } | |
1906 | ||
a4aee5c8 JP |
1907 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1908 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1909 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1910 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1911 | |
1912 | /* enslave is successful */ | |
1913 | return 0; | |
1914 | ||
1915 | /* Undo stages on error */ | |
35d48903 JP |
1916 | err_dest_symlinks: |
1917 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1918 | ||
1da177e4 LT |
1919 | err_close: |
1920 | dev_close(slave_dev); | |
1921 | ||
569f0c4d | 1922 | err_unset_master: |
1765a575 | 1923 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1924 | |
1da177e4 | 1925 | err_restore_mac: |
dd957c57 | 1926 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1927 | /* XXX TODO - fom follow mode needs to change master's |
1928 | * MAC if this slave's MAC is in use by the bond, or at | |
1929 | * least print a warning. | |
1930 | */ | |
2ab82852 MS |
1931 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1932 | addr.sa_family = slave_dev->type; | |
1933 | dev_set_mac_address(slave_dev, &addr); | |
1934 | } | |
1da177e4 | 1935 | |
b15ba0fb JP |
1936 | err_restore_mtu: |
1937 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1938 | ||
1da177e4 LT |
1939 | err_free: |
1940 | kfree(new_slave); | |
1941 | ||
1942 | err_undo_flags: | |
b2a103e6 | 1943 | bond_compute_features(bond); |
3d632c3f | 1944 | |
1da177e4 LT |
1945 | return res; |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | * Try to release the slave device <slave> from the bond device <master> | |
1950 | * It is legal to access curr_active_slave without a lock because all the function | |
1951 | * is write-locked. | |
1952 | * | |
1953 | * The rules for slave state should be: | |
1954 | * for Active/Backup: | |
1955 | * Active stays on all backups go down | |
1956 | * for Bonded connections: | |
1957 | * The first up interface should be left on and all others downed. | |
1958 | */ | |
a77b5325 | 1959 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1960 | { |
454d7c9b | 1961 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1962 | struct slave *slave, *oldcurrent; |
1963 | struct sockaddr addr; | |
b2a103e6 | 1964 | u32 old_features = bond_dev->features; |
1da177e4 LT |
1965 | |
1966 | /* slave is not a slave or master is not master of this slave */ | |
1967 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1968 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1969 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1970 | bond_dev->name, slave_dev->name); |
1971 | return -EINVAL; | |
1972 | } | |
1973 | ||
e843fa50 | 1974 | block_netpoll_tx(); |
daf9209b | 1975 | netdev_bonding_change(bond_dev, NETDEV_RELEASE); |
1da177e4 LT |
1976 | write_lock_bh(&bond->lock); |
1977 | ||
1978 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1979 | if (!slave) { | |
1980 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1981 | pr_info("%s: %s not enslaved\n", |
1982 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1983 | write_unlock_bh(&bond->lock); |
e843fa50 | 1984 | unblock_netpoll_tx(); |
1da177e4 LT |
1985 | return -EINVAL; |
1986 | } | |
1987 | ||
35d48903 JP |
1988 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1989 | * for this slave anymore. | |
1990 | */ | |
1991 | netdev_rx_handler_unregister(slave_dev); | |
1992 | write_unlock_bh(&bond->lock); | |
1993 | synchronize_net(); | |
1994 | write_lock_bh(&bond->lock); | |
1995 | ||
3915c1e8 | 1996 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1997 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1998 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1999 | 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", |
2000 | bond_dev->name, slave_dev->name, | |
2001 | slave->perm_hwaddr, | |
2002 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
2003 | } |
2004 | ||
2005 | /* Inform AD package of unbinding of slave. */ | |
2006 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2007 | /* must be called before the slave is | |
2008 | * detached from the list | |
2009 | */ | |
2010 | bond_3ad_unbind_slave(slave); | |
2011 | } | |
2012 | ||
a4aee5c8 JP |
2013 | pr_info("%s: releasing %s interface %s\n", |
2014 | bond_dev->name, | |
e30bc066 | 2015 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 2016 | slave_dev->name); |
1da177e4 LT |
2017 | |
2018 | oldcurrent = bond->curr_active_slave; | |
2019 | ||
2020 | bond->current_arp_slave = NULL; | |
2021 | ||
2022 | /* release the slave from its bond */ | |
2023 | bond_detach_slave(bond, slave); | |
2024 | ||
3d632c3f | 2025 | if (bond->primary_slave == slave) |
1da177e4 | 2026 | bond->primary_slave = NULL; |
1da177e4 | 2027 | |
3d632c3f | 2028 | if (oldcurrent == slave) |
1da177e4 | 2029 | bond_change_active_slave(bond, NULL); |
1da177e4 | 2030 | |
58402054 | 2031 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2032 | /* Must be called only after the slave has been |
2033 | * detached from the list and the curr_active_slave | |
2034 | * has been cleared (if our_slave == old_current), | |
2035 | * but before a new active slave is selected. | |
2036 | */ | |
2543331d | 2037 | write_unlock_bh(&bond->lock); |
1da177e4 | 2038 | bond_alb_deinit_slave(bond, slave); |
2543331d | 2039 | write_lock_bh(&bond->lock); |
1da177e4 LT |
2040 | } |
2041 | ||
059fe7a5 JV |
2042 | if (oldcurrent == slave) { |
2043 | /* | |
2044 | * Note that we hold RTNL over this sequence, so there | |
2045 | * is no concern that another slave add/remove event | |
2046 | * will interfere. | |
2047 | */ | |
2048 | write_unlock_bh(&bond->lock); | |
2049 | read_lock(&bond->lock); | |
2050 | write_lock_bh(&bond->curr_slave_lock); | |
2051 | ||
1da177e4 LT |
2052 | bond_select_active_slave(bond); |
2053 | ||
059fe7a5 JV |
2054 | write_unlock_bh(&bond->curr_slave_lock); |
2055 | read_unlock(&bond->lock); | |
2056 | write_lock_bh(&bond->lock); | |
2057 | } | |
2058 | ||
1da177e4 | 2059 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
2060 | bond_set_carrier(bond); |
2061 | ||
1da177e4 LT |
2062 | /* if the last slave was removed, zero the mac address |
2063 | * of the master so it will be set by the application | |
2064 | * to the mac address of the first slave | |
2065 | */ | |
2066 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2067 | ||
b2a103e6 | 2068 | if (bond->vlgrp) { |
a4aee5c8 JP |
2069 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2070 | bond_dev->name, bond_dev->name); | |
2071 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2072 | bond_dev->name); | |
1da177e4 | 2073 | } |
1da177e4 LT |
2074 | } |
2075 | ||
2076 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2077 | unblock_netpoll_tx(); |
1da177e4 | 2078 | |
b2a103e6 MM |
2079 | bond_compute_features(bond); |
2080 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2081 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2082 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2083 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2084 | ||
b76cdba9 MW |
2085 | /* must do this from outside any spinlocks */ |
2086 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2087 | ||
1da177e4 LT |
2088 | bond_del_vlans_from_slave(bond, slave_dev); |
2089 | ||
2090 | /* If the mode USES_PRIMARY, then we should only remove its | |
2091 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2092 | * already taken care of above when we detached the slave | |
2093 | */ | |
2094 | if (!USES_PRIMARY(bond->params.mode)) { | |
2095 | /* unset promiscuity level from slave */ | |
3d632c3f | 2096 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2097 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2098 | |
2099 | /* unset allmulti level from slave */ | |
3d632c3f | 2100 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2101 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2102 | |
2103 | /* flush master's mc_list from slave */ | |
b9e40857 | 2104 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2105 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2106 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2107 | } |
2108 | ||
1765a575 | 2109 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2110 | |
8a8efa22 | 2111 | slave_disable_netpoll(slave); |
f6dc31a8 | 2112 | |
1da177e4 LT |
2113 | /* close slave before restoring its mac address */ |
2114 | dev_close(slave_dev); | |
2115 | ||
3915c1e8 | 2116 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2117 | /* restore original ("permanent") mac address */ |
2118 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2119 | addr.sa_family = slave_dev->type; | |
2120 | dev_set_mac_address(slave_dev, &addr); | |
2121 | } | |
1da177e4 | 2122 | |
b15ba0fb JP |
2123 | dev_set_mtu(slave_dev, slave->original_mtu); |
2124 | ||
2d7011ca | 2125 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2126 | |
2127 | kfree(slave); | |
2128 | ||
2129 | return 0; /* deletion OK */ | |
2130 | } | |
2131 | ||
d90a162a | 2132 | /* |
dadaa10b | 2133 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2134 | * Must be under rtnl_lock when this function is called. |
2135 | */ | |
26d8ee75 | 2136 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2137 | struct net_device *slave_dev) | |
d90a162a | 2138 | { |
454d7c9b | 2139 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2140 | int ret; |
2141 | ||
2142 | ret = bond_release(bond_dev, slave_dev); | |
2143 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2144 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2145 | pr_info("%s: destroying bond %s.\n", |
2146 | bond_dev->name, bond_dev->name); | |
9e71626c | 2147 | unregister_netdevice(bond_dev); |
d90a162a MS |
2148 | } |
2149 | return ret; | |
2150 | } | |
2151 | ||
1da177e4 LT |
2152 | /* |
2153 | * This function releases all slaves. | |
2154 | */ | |
2155 | static int bond_release_all(struct net_device *bond_dev) | |
2156 | { | |
454d7c9b | 2157 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2158 | struct slave *slave; |
2159 | struct net_device *slave_dev; | |
2160 | struct sockaddr addr; | |
2161 | ||
2162 | write_lock_bh(&bond->lock); | |
2163 | ||
ff59c456 JV |
2164 | netif_carrier_off(bond_dev); |
2165 | ||
3d632c3f | 2166 | if (bond->slave_cnt == 0) |
1da177e4 | 2167 | goto out; |
1da177e4 LT |
2168 | |
2169 | bond->current_arp_slave = NULL; | |
2170 | bond->primary_slave = NULL; | |
2171 | bond_change_active_slave(bond, NULL); | |
2172 | ||
2173 | while ((slave = bond->first_slave) != NULL) { | |
2174 | /* Inform AD package of unbinding of slave | |
2175 | * before slave is detached from the list. | |
2176 | */ | |
3d632c3f | 2177 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2178 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2179 | |
2180 | slave_dev = slave->dev; | |
2181 | bond_detach_slave(bond, slave); | |
2182 | ||
2543331d JV |
2183 | /* now that the slave is detached, unlock and perform |
2184 | * all the undo steps that should not be called from | |
2185 | * within a lock. | |
2186 | */ | |
2187 | write_unlock_bh(&bond->lock); | |
2188 | ||
35d48903 JP |
2189 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2190 | * be called for this slave anymore. | |
2191 | */ | |
2192 | netdev_rx_handler_unregister(slave_dev); | |
2193 | synchronize_net(); | |
2194 | ||
58402054 | 2195 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2196 | /* must be called only after the slave |
2197 | * has been detached from the list | |
2198 | */ | |
2199 | bond_alb_deinit_slave(bond, slave); | |
2200 | } | |
2201 | ||
b76cdba9 | 2202 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2203 | bond_del_vlans_from_slave(bond, slave_dev); |
2204 | ||
2205 | /* If the mode USES_PRIMARY, then we should only remove its | |
2206 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2207 | * already taken care of above when we detached the slave | |
2208 | */ | |
2209 | if (!USES_PRIMARY(bond->params.mode)) { | |
2210 | /* unset promiscuity level from slave */ | |
3d632c3f | 2211 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2212 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2213 | |
2214 | /* unset allmulti level from slave */ | |
3d632c3f | 2215 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2216 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2217 | |
2218 | /* flush master's mc_list from slave */ | |
b9e40857 | 2219 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2220 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2221 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2222 | } |
2223 | ||
1765a575 | 2224 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2225 | |
8a8efa22 AW |
2226 | slave_disable_netpoll(slave); |
2227 | ||
1da177e4 LT |
2228 | /* close slave before restoring its mac address */ |
2229 | dev_close(slave_dev); | |
2230 | ||
dd957c57 | 2231 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2232 | /* restore original ("permanent") mac address*/ |
2233 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2234 | addr.sa_family = slave_dev->type; | |
2235 | dev_set_mac_address(slave_dev, &addr); | |
2236 | } | |
1da177e4 | 2237 | |
1da177e4 LT |
2238 | kfree(slave); |
2239 | ||
2240 | /* re-acquire the lock before getting the next slave */ | |
2241 | write_lock_bh(&bond->lock); | |
2242 | } | |
2243 | ||
2244 | /* zero the mac address of the master so it will be | |
2245 | * set by the application to the mac address of the | |
2246 | * first slave | |
2247 | */ | |
2248 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2249 | ||
b2a103e6 | 2250 | if (bond->vlgrp) { |
a4aee5c8 JP |
2251 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2252 | bond_dev->name, bond_dev->name); | |
2253 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2254 | bond_dev->name); | |
1da177e4 LT |
2255 | } |
2256 | ||
a4aee5c8 | 2257 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2258 | |
2259 | out: | |
2260 | write_unlock_bh(&bond->lock); | |
b2a103e6 MM |
2261 | |
2262 | bond_compute_features(bond); | |
2263 | ||
1da177e4 LT |
2264 | return 0; |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * This function changes the active slave to slave <slave_dev>. | |
2269 | * It returns -EINVAL in the following cases. | |
2270 | * - <slave_dev> is not found in the list. | |
2271 | * - There is not active slave now. | |
2272 | * - <slave_dev> is already active. | |
2273 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2274 | * - <slave_dev> is not running. | |
3d632c3f SH |
2275 | * In these cases, this function does nothing. |
2276 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2277 | */ |
2278 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2279 | { | |
454d7c9b | 2280 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2281 | struct slave *old_active = NULL; |
2282 | struct slave *new_active = NULL; | |
2283 | int res = 0; | |
2284 | ||
3d632c3f | 2285 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2286 | return -EINVAL; |
1da177e4 LT |
2287 | |
2288 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2289 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2290 | return -EINVAL; |
1da177e4 | 2291 | |
059fe7a5 | 2292 | read_lock(&bond->lock); |
1da177e4 | 2293 | |
059fe7a5 | 2294 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2295 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2296 | read_unlock(&bond->curr_slave_lock); |
2297 | ||
1da177e4 LT |
2298 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2299 | ||
2300 | /* | |
2301 | * Changing to the current active: do nothing; return success. | |
2302 | */ | |
2303 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2304 | read_unlock(&bond->lock); |
1da177e4 LT |
2305 | return 0; |
2306 | } | |
2307 | ||
2308 | if ((new_active) && | |
2309 | (old_active) && | |
2310 | (new_active->link == BOND_LINK_UP) && | |
2311 | IS_UP(new_active->dev)) { | |
e843fa50 | 2312 | block_netpoll_tx(); |
059fe7a5 | 2313 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2314 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2315 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2316 | unblock_netpoll_tx(); |
3d632c3f | 2317 | } else |
1da177e4 | 2318 | res = -EINVAL; |
1da177e4 | 2319 | |
059fe7a5 | 2320 | read_unlock(&bond->lock); |
1da177e4 LT |
2321 | |
2322 | return res; | |
2323 | } | |
2324 | ||
1da177e4 LT |
2325 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2326 | { | |
454d7c9b | 2327 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2328 | |
2329 | info->bond_mode = bond->params.mode; | |
2330 | info->miimon = bond->params.miimon; | |
2331 | ||
6603a6f2 | 2332 | read_lock(&bond->lock); |
1da177e4 | 2333 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2334 | read_unlock(&bond->lock); |
1da177e4 LT |
2335 | |
2336 | return 0; | |
2337 | } | |
2338 | ||
2339 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2340 | { | |
454d7c9b | 2341 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2342 | struct slave *slave; |
689c96cc | 2343 | int i, res = -ENODEV; |
1da177e4 | 2344 | |
6603a6f2 | 2345 | read_lock(&bond->lock); |
1da177e4 LT |
2346 | |
2347 | bond_for_each_slave(bond, slave, i) { | |
2348 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2349 | res = 0; |
2350 | strcpy(info->slave_name, slave->dev->name); | |
2351 | info->link = slave->link; | |
e30bc066 | 2352 | info->state = bond_slave_state(slave); |
689c96cc | 2353 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2354 | break; |
2355 | } | |
2356 | } | |
2357 | ||
6603a6f2 | 2358 | read_unlock(&bond->lock); |
1da177e4 | 2359 | |
689c96cc | 2360 | return res; |
1da177e4 LT |
2361 | } |
2362 | ||
2363 | /*-------------------------------- Monitoring -------------------------------*/ | |
2364 | ||
1da177e4 | 2365 | |
f0c76d61 JV |
2366 | static int bond_miimon_inspect(struct bonding *bond) |
2367 | { | |
2368 | struct slave *slave; | |
2369 | int i, link_state, commit = 0; | |
41f89100 JP |
2370 | bool ignore_updelay; |
2371 | ||
2372 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2373 | |
2374 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2375 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2376 | |
f0c76d61 | 2377 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2378 | |
2379 | switch (slave->link) { | |
f0c76d61 JV |
2380 | case BOND_LINK_UP: |
2381 | if (link_state) | |
2382 | continue; | |
1da177e4 | 2383 | |
f0c76d61 JV |
2384 | slave->link = BOND_LINK_FAIL; |
2385 | slave->delay = bond->params.downdelay; | |
2386 | if (slave->delay) { | |
a4aee5c8 JP |
2387 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2388 | bond->dev->name, | |
2389 | (bond->params.mode == | |
2390 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2391 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2392 | "active " : "backup ") : "", |
2393 | slave->dev->name, | |
2394 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2395 | } |
f0c76d61 JV |
2396 | /*FALLTHRU*/ |
2397 | case BOND_LINK_FAIL: | |
2398 | if (link_state) { | |
2399 | /* | |
2400 | * recovered before downdelay expired | |
2401 | */ | |
2402 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2403 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2404 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2405 | bond->dev->name, | |
2406 | (bond->params.downdelay - slave->delay) * | |
2407 | bond->params.miimon, | |
2408 | slave->dev->name); | |
f0c76d61 | 2409 | continue; |
1da177e4 | 2410 | } |
f0c76d61 JV |
2411 | |
2412 | if (slave->delay <= 0) { | |
2413 | slave->new_link = BOND_LINK_DOWN; | |
2414 | commit++; | |
2415 | continue; | |
1da177e4 | 2416 | } |
1da177e4 | 2417 | |
f0c76d61 JV |
2418 | slave->delay--; |
2419 | break; | |
2420 | ||
2421 | case BOND_LINK_DOWN: | |
2422 | if (!link_state) | |
2423 | continue; | |
2424 | ||
2425 | slave->link = BOND_LINK_BACK; | |
2426 | slave->delay = bond->params.updelay; | |
2427 | ||
2428 | if (slave->delay) { | |
a4aee5c8 JP |
2429 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2430 | bond->dev->name, slave->dev->name, | |
2431 | ignore_updelay ? 0 : | |
2432 | bond->params.updelay * | |
2433 | bond->params.miimon); | |
f0c76d61 JV |
2434 | } |
2435 | /*FALLTHRU*/ | |
2436 | case BOND_LINK_BACK: | |
2437 | if (!link_state) { | |
2438 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2439 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2440 | bond->dev->name, | |
2441 | (bond->params.updelay - slave->delay) * | |
2442 | bond->params.miimon, | |
2443 | slave->dev->name); | |
f0c76d61 JV |
2444 | |
2445 | continue; | |
2446 | } | |
2447 | ||
41f89100 JP |
2448 | if (ignore_updelay) |
2449 | slave->delay = 0; | |
2450 | ||
f0c76d61 JV |
2451 | if (slave->delay <= 0) { |
2452 | slave->new_link = BOND_LINK_UP; | |
2453 | commit++; | |
41f89100 | 2454 | ignore_updelay = false; |
f0c76d61 | 2455 | continue; |
1da177e4 | 2456 | } |
f0c76d61 JV |
2457 | |
2458 | slave->delay--; | |
1da177e4 | 2459 | break; |
f0c76d61 JV |
2460 | } |
2461 | } | |
1da177e4 | 2462 | |
f0c76d61 JV |
2463 | return commit; |
2464 | } | |
1da177e4 | 2465 | |
f0c76d61 JV |
2466 | static void bond_miimon_commit(struct bonding *bond) |
2467 | { | |
2468 | struct slave *slave; | |
2469 | int i; | |
2470 | ||
2471 | bond_for_each_slave(bond, slave, i) { | |
2472 | switch (slave->new_link) { | |
2473 | case BOND_LINK_NOCHANGE: | |
2474 | continue; | |
1da177e4 | 2475 | |
f0c76d61 JV |
2476 | case BOND_LINK_UP: |
2477 | slave->link = BOND_LINK_UP; | |
2478 | slave->jiffies = jiffies; | |
2479 | ||
2480 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2481 | /* prevent it from being the active one */ | |
e30bc066 | 2482 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2483 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2484 | /* make it immediately active */ | |
e30bc066 | 2485 | bond_set_active_slave(slave); |
f0c76d61 JV |
2486 | } else if (slave != bond->primary_slave) { |
2487 | /* prevent it from being the active one */ | |
e30bc066 | 2488 | bond_set_backup_slave(slave); |
1da177e4 | 2489 | } |
1da177e4 | 2490 | |
546add79 KPO |
2491 | bond_update_speed_duplex(slave); |
2492 | ||
5d30530e | 2493 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2494 | bond->dev->name, slave->dev->name, |
2495 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2496 | |
f0c76d61 JV |
2497 | /* notify ad that the link status has changed */ |
2498 | if (bond->params.mode == BOND_MODE_8023AD) | |
2499 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2500 | |
58402054 | 2501 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2502 | bond_alb_handle_link_change(bond, slave, |
2503 | BOND_LINK_UP); | |
1da177e4 | 2504 | |
f0c76d61 JV |
2505 | if (!bond->curr_active_slave || |
2506 | (slave == bond->primary_slave)) | |
2507 | goto do_failover; | |
1da177e4 | 2508 | |
f0c76d61 | 2509 | continue; |
059fe7a5 | 2510 | |
f0c76d61 | 2511 | case BOND_LINK_DOWN: |
fba4acda JV |
2512 | if (slave->link_failure_count < UINT_MAX) |
2513 | slave->link_failure_count++; | |
2514 | ||
f0c76d61 | 2515 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2516 | |
f0c76d61 JV |
2517 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2518 | bond->params.mode == BOND_MODE_8023AD) | |
2519 | bond_set_slave_inactive_flags(slave); | |
2520 | ||
a4aee5c8 JP |
2521 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2522 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2523 | |
2524 | if (bond->params.mode == BOND_MODE_8023AD) | |
2525 | bond_3ad_handle_link_change(slave, | |
2526 | BOND_LINK_DOWN); | |
2527 | ||
ae63e808 | 2528 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2529 | bond_alb_handle_link_change(bond, slave, |
2530 | BOND_LINK_DOWN); | |
2531 | ||
2532 | if (slave == bond->curr_active_slave) | |
2533 | goto do_failover; | |
2534 | ||
2535 | continue; | |
2536 | ||
2537 | default: | |
a4aee5c8 | 2538 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2539 | bond->dev->name, slave->new_link, |
2540 | slave->dev->name); | |
2541 | slave->new_link = BOND_LINK_NOCHANGE; | |
2542 | ||
2543 | continue; | |
2544 | } | |
2545 | ||
2546 | do_failover: | |
2547 | ASSERT_RTNL(); | |
e843fa50 | 2548 | block_netpoll_tx(); |
f0c76d61 JV |
2549 | write_lock_bh(&bond->curr_slave_lock); |
2550 | bond_select_active_slave(bond); | |
2551 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2552 | unblock_netpoll_tx(); |
f0c76d61 JV |
2553 | } |
2554 | ||
2555 | bond_set_carrier(bond); | |
1da177e4 LT |
2556 | } |
2557 | ||
0b0eef66 JV |
2558 | /* |
2559 | * bond_mii_monitor | |
2560 | * | |
2561 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2562 | * inspection, then (if inspection indicates something needs to be done) |
2563 | * an acquisition of appropriate locks followed by a commit phase to | |
2564 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2565 | */ |
2566 | void bond_mii_monitor(struct work_struct *work) | |
2567 | { | |
2568 | struct bonding *bond = container_of(work, struct bonding, | |
2569 | mii_work.work); | |
ad246c99 | 2570 | bool should_notify_peers = false; |
0b0eef66 JV |
2571 | |
2572 | read_lock(&bond->lock); | |
f0c76d61 JV |
2573 | if (bond->kill_timers) |
2574 | goto out; | |
2575 | ||
2576 | if (bond->slave_cnt == 0) | |
2577 | goto re_arm; | |
b59f9f74 | 2578 | |
ad246c99 BH |
2579 | should_notify_peers = bond_should_notify_peers(bond); |
2580 | ||
f0c76d61 | 2581 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2582 | read_unlock(&bond->lock); |
2583 | rtnl_lock(); | |
2584 | read_lock(&bond->lock); | |
f0c76d61 JV |
2585 | |
2586 | bond_miimon_commit(bond); | |
2587 | ||
5655662d JV |
2588 | read_unlock(&bond->lock); |
2589 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2590 | read_lock(&bond->lock); | |
0b0eef66 JV |
2591 | } |
2592 | ||
f0c76d61 JV |
2593 | re_arm: |
2594 | if (bond->params.miimon) | |
2595 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2596 | msecs_to_jiffies(bond->params.miimon)); | |
2597 | out: | |
0b0eef66 | 2598 | read_unlock(&bond->lock); |
ad246c99 BH |
2599 | |
2600 | if (should_notify_peers) { | |
2601 | rtnl_lock(); | |
2602 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); | |
2603 | rtnl_unlock(); | |
2604 | } | |
0b0eef66 | 2605 | } |
c3ade5ca | 2606 | |
d3bb52b0 | 2607 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2608 | { |
2609 | struct in_device *idev; | |
2610 | struct in_ifaddr *ifa; | |
a144ea4b | 2611 | __be32 addr = 0; |
c3ade5ca JV |
2612 | |
2613 | if (!dev) | |
2614 | return 0; | |
2615 | ||
2616 | rcu_read_lock(); | |
e5ed6399 | 2617 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2618 | if (!idev) |
2619 | goto out; | |
2620 | ||
2621 | ifa = idev->ifa_list; | |
2622 | if (!ifa) | |
2623 | goto out; | |
2624 | ||
2625 | addr = ifa->ifa_local; | |
2626 | out: | |
2627 | rcu_read_unlock(); | |
2628 | return addr; | |
2629 | } | |
2630 | ||
d3bb52b0 | 2631 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2632 | { |
0883beca | 2633 | struct vlan_entry *vlan; |
f5b2b966 JV |
2634 | |
2635 | if (ip == bond->master_ip) | |
2636 | return 1; | |
2637 | ||
0883beca | 2638 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2639 | if (ip == vlan->vlan_ip) |
2640 | return 1; | |
2641 | } | |
2642 | ||
2643 | return 0; | |
2644 | } | |
2645 | ||
c3ade5ca JV |
2646 | /* |
2647 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2648 | * switches in VLAN mode (especially if ports are configured as | |
2649 | * "native" to a VLAN) might not pass non-tagged frames. | |
2650 | */ | |
d3bb52b0 | 2651 | 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 |
2652 | { |
2653 | struct sk_buff *skb; | |
2654 | ||
5a03cdb7 | 2655 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2656 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2657 | |
c3ade5ca JV |
2658 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2659 | NULL, slave_dev->dev_addr, NULL); | |
2660 | ||
2661 | if (!skb) { | |
a4aee5c8 | 2662 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2663 | return; |
2664 | } | |
2665 | if (vlan_id) { | |
2666 | skb = vlan_put_tag(skb, vlan_id); | |
2667 | if (!skb) { | |
a4aee5c8 | 2668 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2669 | return; |
2670 | } | |
2671 | } | |
2672 | arp_xmit(skb); | |
2673 | } | |
2674 | ||
2675 | ||
1da177e4 LT |
2676 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2677 | { | |
b23dd4fe | 2678 | int i, vlan_id; |
d3bb52b0 | 2679 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2680 | struct vlan_entry *vlan; |
c3ade5ca | 2681 | struct net_device *vlan_dev; |
c3ade5ca | 2682 | struct rtable *rt; |
1da177e4 | 2683 | |
6b780567 MW |
2684 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2685 | if (!targets[i]) | |
5a31bec0 | 2686 | break; |
5a03cdb7 | 2687 | pr_debug("basa: target %x\n", targets[i]); |
f35188fa | 2688 | if (!bond->vlgrp) { |
5a03cdb7 | 2689 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2690 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2691 | bond->master_ip, 0); | |
2692 | continue; | |
2693 | } | |
2694 | ||
2695 | /* | |
2696 | * If VLANs are configured, we do a route lookup to | |
2697 | * determine which VLAN interface would be used, so we | |
2698 | * can tag the ARP with the proper VLAN tag. | |
2699 | */ | |
78fbfd8a DM |
2700 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2701 | RTO_ONLINK, 0); | |
b23dd4fe | 2702 | if (IS_ERR(rt)) { |
c3ade5ca | 2703 | if (net_ratelimit()) { |
a4aee5c8 | 2704 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2705 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2706 | } |
2707 | continue; | |
2708 | } | |
2709 | ||
2710 | /* | |
2711 | * This target is not on a VLAN | |
2712 | */ | |
d8d1f30b | 2713 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2714 | ip_rt_put(rt); |
5a03cdb7 | 2715 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2716 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2717 | bond->master_ip, 0); | |
2718 | continue; | |
2719 | } | |
2720 | ||
2721 | vlan_id = 0; | |
0883beca | 2722 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2723 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
d8d1f30b | 2724 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2725 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2726 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2727 | vlan_dev->name, vlan_id); |
2728 | break; | |
2729 | } | |
2730 | } | |
2731 | ||
2732 | if (vlan_id) { | |
ed4b9f80 | 2733 | ip_rt_put(rt); |
c3ade5ca JV |
2734 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2735 | vlan->vlan_ip, vlan_id); | |
2736 | continue; | |
2737 | } | |
2738 | ||
2739 | if (net_ratelimit()) { | |
a4aee5c8 | 2740 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2741 | bond->dev->name, &targets[i], |
d8d1f30b | 2742 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2743 | } |
ed4b9f80 | 2744 | ip_rt_put(rt); |
c3ade5ca JV |
2745 | } |
2746 | } | |
2747 | ||
d3bb52b0 | 2748 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2749 | { |
2750 | int i; | |
d3bb52b0 | 2751 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2752 | |
f5b2b966 | 2753 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2754 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2755 | &sip, &tip, i, &targets[i], |
2756 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2757 | if (sip == targets[i]) { |
2758 | if (bond_has_this_ip(bond, tip)) | |
2759 | slave->last_arp_rx = jiffies; | |
2760 | return; | |
2761 | } | |
2762 | } | |
2763 | } | |
2764 | ||
3aba891d JP |
2765 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2766 | struct slave *slave) | |
f5b2b966 JV |
2767 | { |
2768 | struct arphdr *arp; | |
f5b2b966 | 2769 | unsigned char *arp_ptr; |
d3bb52b0 | 2770 | __be32 sip, tip; |
f5b2b966 | 2771 | |
3aba891d JP |
2772 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2773 | return; | |
f5b2b966 | 2774 | |
f5b2b966 JV |
2775 | read_lock(&bond->lock); |
2776 | ||
3aba891d JP |
2777 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2778 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2779 | |
3aba891d | 2780 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2781 | goto out_unlock; |
2782 | ||
d0a92be0 | 2783 | arp = arp_hdr(skb); |
3aba891d | 2784 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2785 | skb->pkt_type == PACKET_OTHERHOST || |
2786 | skb->pkt_type == PACKET_LOOPBACK || | |
2787 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2788 | arp->ar_pro != htons(ETH_P_IP) || | |
2789 | arp->ar_pln != 4) | |
2790 | goto out_unlock; | |
2791 | ||
2792 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2793 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2794 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2795 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2796 | memcpy(&tip, arp_ptr, 4); |
2797 | ||
5a03cdb7 | 2798 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2799 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2800 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2801 | &sip, &tip); | |
f5b2b966 JV |
2802 | |
2803 | /* | |
2804 | * Backup slaves won't see the ARP reply, but do come through | |
2805 | * here for each ARP probe (so we swap the sip/tip to validate | |
2806 | * the probe). In a "redundant switch, common router" type of | |
2807 | * configuration, the ARP probe will (hopefully) travel from | |
2808 | * the active, through one switch, the router, then the other | |
2809 | * switch before reaching the backup. | |
2810 | */ | |
e30bc066 | 2811 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2812 | bond_validate_arp(bond, slave, sip, tip); |
2813 | else | |
2814 | bond_validate_arp(bond, slave, tip, sip); | |
2815 | ||
2816 | out_unlock: | |
2817 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2818 | } |
2819 | ||
1da177e4 LT |
2820 | /* |
2821 | * this function is called regularly to monitor each slave's link | |
2822 | * ensuring that traffic is being sent and received when arp monitoring | |
2823 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2824 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2825 | * arp monitoring in active backup mode. | |
2826 | */ | |
1b76b316 | 2827 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2828 | { |
1b76b316 JV |
2829 | struct bonding *bond = container_of(work, struct bonding, |
2830 | arp_work.work); | |
1da177e4 LT |
2831 | struct slave *slave, *oldcurrent; |
2832 | int do_failover = 0; | |
2833 | int delta_in_ticks; | |
2834 | int i; | |
2835 | ||
2836 | read_lock(&bond->lock); | |
2837 | ||
5ce0da8f | 2838 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2839 | |
3d632c3f | 2840 | if (bond->kill_timers) |
1da177e4 | 2841 | goto out; |
1da177e4 | 2842 | |
3d632c3f | 2843 | if (bond->slave_cnt == 0) |
1da177e4 | 2844 | goto re_arm; |
1da177e4 LT |
2845 | |
2846 | read_lock(&bond->curr_slave_lock); | |
2847 | oldcurrent = bond->curr_active_slave; | |
2848 | read_unlock(&bond->curr_slave_lock); | |
2849 | ||
2850 | /* see if any of the previous devices are up now (i.e. they have | |
2851 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2852 | * the picture unless it is null. also, slave->jiffies is not needed | |
2853 | * here because we send an arp on each slave and give a slave as | |
2854 | * long as it needs to get the tx/rx within the delta. | |
2855 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2856 | * so it can wait | |
2857 | */ | |
2858 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2859 | unsigned long trans_start = dev_trans_start(slave->dev); |
2860 | ||
1da177e4 | 2861 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2862 | if (time_in_range(jiffies, |
2863 | trans_start - delta_in_ticks, | |
2864 | trans_start + delta_in_ticks) && | |
2865 | time_in_range(jiffies, | |
2866 | slave->dev->last_rx - delta_in_ticks, | |
2867 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2868 | |
2869 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2870 | bond_set_active_slave(slave); |
1da177e4 LT |
2871 | |
2872 | /* primary_slave has no meaning in round-robin | |
2873 | * mode. the window of a slave being up and | |
2874 | * curr_active_slave being null after enslaving | |
2875 | * is closed. | |
2876 | */ | |
2877 | if (!oldcurrent) { | |
a4aee5c8 JP |
2878 | pr_info("%s: link status definitely up for interface %s, ", |
2879 | bond->dev->name, | |
2880 | slave->dev->name); | |
1da177e4 LT |
2881 | do_failover = 1; |
2882 | } else { | |
a4aee5c8 JP |
2883 | pr_info("%s: interface %s is now up\n", |
2884 | bond->dev->name, | |
2885 | slave->dev->name); | |
1da177e4 LT |
2886 | } |
2887 | } | |
2888 | } else { | |
2889 | /* slave->link == BOND_LINK_UP */ | |
2890 | ||
2891 | /* not all switches will respond to an arp request | |
2892 | * when the source ip is 0, so don't take the link down | |
2893 | * if we don't know our ip yet | |
2894 | */ | |
cb32f2a0 JB |
2895 | if (!time_in_range(jiffies, |
2896 | trans_start - delta_in_ticks, | |
2897 | trans_start + 2 * delta_in_ticks) || | |
2898 | !time_in_range(jiffies, | |
2899 | slave->dev->last_rx - delta_in_ticks, | |
2900 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2901 | |
2902 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2903 | bond_set_backup_slave(slave); |
1da177e4 | 2904 | |
3d632c3f | 2905 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2906 | slave->link_failure_count++; |
1da177e4 | 2907 | |
a4aee5c8 JP |
2908 | pr_info("%s: interface %s is now down.\n", |
2909 | bond->dev->name, | |
2910 | slave->dev->name); | |
1da177e4 | 2911 | |
3d632c3f | 2912 | if (slave == oldcurrent) |
1da177e4 | 2913 | do_failover = 1; |
1da177e4 LT |
2914 | } |
2915 | } | |
2916 | ||
2917 | /* note: if switch is in round-robin mode, all links | |
2918 | * must tx arp to ensure all links rx an arp - otherwise | |
2919 | * links may oscillate or not come up at all; if switch is | |
2920 | * in something like xor mode, there is nothing we can | |
2921 | * do - all replies will be rx'ed on same link causing slaves | |
2922 | * to be unstable during low/no traffic periods | |
2923 | */ | |
3d632c3f | 2924 | if (IS_UP(slave->dev)) |
1da177e4 | 2925 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2926 | } |
2927 | ||
2928 | if (do_failover) { | |
e843fa50 | 2929 | block_netpoll_tx(); |
059fe7a5 | 2930 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2931 | |
2932 | bond_select_active_slave(bond); | |
2933 | ||
059fe7a5 | 2934 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2935 | unblock_netpoll_tx(); |
1da177e4 LT |
2936 | } |
2937 | ||
2938 | re_arm: | |
1b76b316 JV |
2939 | if (bond->params.arp_interval) |
2940 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2941 | out: |
2942 | read_unlock(&bond->lock); | |
2943 | } | |
2944 | ||
2945 | /* | |
b2220cad JV |
2946 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2947 | * changes. Sets new_link in slaves to specify what action should take | |
2948 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2949 | * to link states must be committed. | |
2950 | * | |
2951 | * Called with bond->lock held for read. | |
1da177e4 | 2952 | */ |
b2220cad | 2953 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2954 | { |
1da177e4 | 2955 | struct slave *slave; |
b2220cad | 2956 | int i, commit = 0; |
cb32f2a0 | 2957 | unsigned long trans_start; |
1da177e4 | 2958 | |
b2220cad JV |
2959 | bond_for_each_slave(bond, slave, i) { |
2960 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2961 | |
b2220cad | 2962 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2963 | if (time_in_range(jiffies, |
2964 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2965 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2966 | ||
b2220cad JV |
2967 | slave->new_link = BOND_LINK_UP; |
2968 | commit++; | |
2969 | } | |
1da177e4 | 2970 | |
b2220cad JV |
2971 | continue; |
2972 | } | |
1da177e4 | 2973 | |
b2220cad JV |
2974 | /* |
2975 | * Give slaves 2*delta after being enslaved or made | |
2976 | * active. This avoids bouncing, as the last receive | |
2977 | * times need a full ARP monitor cycle to be updated. | |
2978 | */ | |
cb32f2a0 JB |
2979 | if (time_in_range(jiffies, |
2980 | slave->jiffies - delta_in_ticks, | |
2981 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
2982 | continue; |
2983 | ||
2984 | /* | |
2985 | * Backup slave is down if: | |
2986 | * - No current_arp_slave AND | |
2987 | * - more than 3*delta since last receive AND | |
2988 | * - the bond has an IP address | |
2989 | * | |
2990 | * Note: a non-null current_arp_slave indicates | |
2991 | * the curr_active_slave went down and we are | |
2992 | * searching for a new one; under this condition | |
2993 | * we only take the curr_active_slave down - this | |
2994 | * gives each slave a chance to tx/rx traffic | |
2995 | * before being taken out | |
2996 | */ | |
e30bc066 | 2997 | if (!bond_is_active_slave(slave) && |
b2220cad | 2998 | !bond->current_arp_slave && |
cb32f2a0 JB |
2999 | !time_in_range(jiffies, |
3000 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3001 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
3002 | ||
b2220cad JV |
3003 | slave->new_link = BOND_LINK_DOWN; |
3004 | commit++; | |
3005 | } | |
3006 | ||
3007 | /* | |
3008 | * Active slave is down if: | |
3009 | * - more than 2*delta since transmitting OR | |
3010 | * - (more than 2*delta since receive AND | |
3011 | * the bond has an IP address) | |
3012 | */ | |
cb32f2a0 | 3013 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 3014 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
3015 | (!time_in_range(jiffies, |
3016 | trans_start - delta_in_ticks, | |
3017 | trans_start + 2 * delta_in_ticks) || | |
3018 | !time_in_range(jiffies, | |
3019 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3020 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
3021 | ||
b2220cad JV |
3022 | slave->new_link = BOND_LINK_DOWN; |
3023 | commit++; | |
3024 | } | |
1da177e4 LT |
3025 | } |
3026 | ||
b2220cad JV |
3027 | return commit; |
3028 | } | |
1da177e4 | 3029 | |
b2220cad JV |
3030 | /* |
3031 | * Called to commit link state changes noted by inspection step of | |
3032 | * active-backup mode ARP monitor. | |
3033 | * | |
3034 | * Called with RTNL and bond->lock for read. | |
3035 | */ | |
3036 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
3037 | { | |
3038 | struct slave *slave; | |
3039 | int i; | |
cb32f2a0 | 3040 | unsigned long trans_start; |
1da177e4 | 3041 | |
b2220cad JV |
3042 | bond_for_each_slave(bond, slave, i) { |
3043 | switch (slave->new_link) { | |
3044 | case BOND_LINK_NOCHANGE: | |
3045 | continue; | |
ff59c456 | 3046 | |
b2220cad | 3047 | case BOND_LINK_UP: |
cb32f2a0 | 3048 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 3049 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
3050 | time_in_range(jiffies, |
3051 | trans_start - delta_in_ticks, | |
3052 | trans_start + delta_in_ticks)) || | |
b9f60253 | 3053 | bond->curr_active_slave != slave) { |
b2220cad | 3054 | slave->link = BOND_LINK_UP; |
b2220cad JV |
3055 | bond->current_arp_slave = NULL; |
3056 | ||
a4aee5c8 | 3057 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3058 | bond->dev->name, slave->dev->name); |
b2220cad | 3059 | |
b9f60253 JP |
3060 | if (!bond->curr_active_slave || |
3061 | (slave == bond->primary_slave)) | |
3062 | goto do_failover; | |
1da177e4 | 3063 | |
b9f60253 | 3064 | } |
1da177e4 | 3065 | |
b9f60253 | 3066 | continue; |
1da177e4 | 3067 | |
b2220cad JV |
3068 | case BOND_LINK_DOWN: |
3069 | if (slave->link_failure_count < UINT_MAX) | |
3070 | slave->link_failure_count++; | |
3071 | ||
3072 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3073 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3074 | |
a4aee5c8 | 3075 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3076 | bond->dev->name, slave->dev->name); |
b2220cad | 3077 | |
b9f60253 | 3078 | if (slave == bond->curr_active_slave) { |
b2220cad | 3079 | bond->current_arp_slave = NULL; |
b9f60253 | 3080 | goto do_failover; |
1da177e4 | 3081 | } |
b9f60253 JP |
3082 | |
3083 | continue; | |
b2220cad JV |
3084 | |
3085 | default: | |
a4aee5c8 | 3086 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3087 | bond->dev->name, slave->new_link, |
3088 | slave->dev->name); | |
b9f60253 | 3089 | continue; |
1da177e4 | 3090 | } |
1da177e4 | 3091 | |
b9f60253 JP |
3092 | do_failover: |
3093 | ASSERT_RTNL(); | |
e843fa50 | 3094 | block_netpoll_tx(); |
b2220cad | 3095 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3096 | bond_select_active_slave(bond); |
b2220cad | 3097 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3098 | unblock_netpoll_tx(); |
b2220cad | 3099 | } |
1da177e4 | 3100 | |
b2220cad JV |
3101 | bond_set_carrier(bond); |
3102 | } | |
1da177e4 | 3103 | |
b2220cad JV |
3104 | /* |
3105 | * Send ARP probes for active-backup mode ARP monitor. | |
3106 | * | |
3107 | * Called with bond->lock held for read. | |
3108 | */ | |
3109 | static void bond_ab_arp_probe(struct bonding *bond) | |
3110 | { | |
3111 | struct slave *slave; | |
3112 | int i; | |
1da177e4 | 3113 | |
b2220cad | 3114 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3115 | |
b2220cad | 3116 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3117 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3118 | bond->current_arp_slave->dev->name, | |
3119 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3120 | |
b2220cad JV |
3121 | if (bond->curr_active_slave) { |
3122 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3123 | read_unlock(&bond->curr_slave_lock); | |
3124 | return; | |
3125 | } | |
1da177e4 | 3126 | |
b2220cad | 3127 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3128 | |
b2220cad JV |
3129 | /* if we don't have a curr_active_slave, search for the next available |
3130 | * backup slave from the current_arp_slave and make it the candidate | |
3131 | * for becoming the curr_active_slave | |
3132 | */ | |
1da177e4 | 3133 | |
b2220cad JV |
3134 | if (!bond->current_arp_slave) { |
3135 | bond->current_arp_slave = bond->first_slave; | |
3136 | if (!bond->current_arp_slave) | |
3137 | return; | |
3138 | } | |
1da177e4 | 3139 | |
b2220cad | 3140 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3141 | |
b2220cad JV |
3142 | /* search for next candidate */ |
3143 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3144 | if (IS_UP(slave->dev)) { | |
3145 | slave->link = BOND_LINK_BACK; | |
3146 | bond_set_slave_active_flags(slave); | |
3147 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3148 | slave->jiffies = jiffies; |
b2220cad JV |
3149 | bond->current_arp_slave = slave; |
3150 | break; | |
1da177e4 LT |
3151 | } |
3152 | ||
b2220cad JV |
3153 | /* if the link state is up at this point, we |
3154 | * mark it down - this can happen if we have | |
3155 | * simultaneous link failures and | |
3156 | * reselect_active_interface doesn't make this | |
3157 | * one the current slave so it is still marked | |
3158 | * up when it is actually down | |
1da177e4 | 3159 | */ |
b2220cad JV |
3160 | if (slave->link == BOND_LINK_UP) { |
3161 | slave->link = BOND_LINK_DOWN; | |
3162 | if (slave->link_failure_count < UINT_MAX) | |
3163 | slave->link_failure_count++; | |
1da177e4 | 3164 | |
b2220cad JV |
3165 | bond_set_slave_inactive_flags(slave); |
3166 | ||
a4aee5c8 JP |
3167 | pr_info("%s: backup interface %s is now down.\n", |
3168 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3169 | } |
b2220cad JV |
3170 | } |
3171 | } | |
1da177e4 | 3172 | |
b2220cad JV |
3173 | void bond_activebackup_arp_mon(struct work_struct *work) |
3174 | { | |
3175 | struct bonding *bond = container_of(work, struct bonding, | |
3176 | arp_work.work); | |
ad246c99 | 3177 | bool should_notify_peers = false; |
b2220cad | 3178 | int delta_in_ticks; |
1da177e4 | 3179 | |
b2220cad | 3180 | read_lock(&bond->lock); |
1da177e4 | 3181 | |
b2220cad JV |
3182 | if (bond->kill_timers) |
3183 | goto out; | |
1da177e4 | 3184 | |
b2220cad | 3185 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3186 | |
b2220cad JV |
3187 | if (bond->slave_cnt == 0) |
3188 | goto re_arm; | |
3189 | ||
ad246c99 BH |
3190 | should_notify_peers = bond_should_notify_peers(bond); |
3191 | ||
b2220cad JV |
3192 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3193 | read_unlock(&bond->lock); | |
3194 | rtnl_lock(); | |
3195 | read_lock(&bond->lock); | |
3196 | ||
3197 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3198 | ||
3199 | read_unlock(&bond->lock); | |
3200 | rtnl_unlock(); | |
3201 | read_lock(&bond->lock); | |
1da177e4 LT |
3202 | } |
3203 | ||
b2220cad JV |
3204 | bond_ab_arp_probe(bond); |
3205 | ||
1da177e4 | 3206 | re_arm: |
3d632c3f | 3207 | if (bond->params.arp_interval) |
1b76b316 | 3208 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3209 | out: |
3210 | read_unlock(&bond->lock); | |
ad246c99 BH |
3211 | |
3212 | if (should_notify_peers) { | |
3213 | rtnl_lock(); | |
3214 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); | |
3215 | rtnl_unlock(); | |
3216 | } | |
1da177e4 LT |
3217 | } |
3218 | ||
1da177e4 LT |
3219 | /*-------------------------- netdev event handling --------------------------*/ |
3220 | ||
3221 | /* | |
3222 | * Change device name | |
3223 | */ | |
3224 | static int bond_event_changename(struct bonding *bond) | |
3225 | { | |
1da177e4 LT |
3226 | bond_remove_proc_entry(bond); |
3227 | bond_create_proc_entry(bond); | |
7e083840 | 3228 | |
f073c7ca TI |
3229 | bond_debug_reregister(bond); |
3230 | ||
1da177e4 LT |
3231 | return NOTIFY_DONE; |
3232 | } | |
3233 | ||
3d632c3f SH |
3234 | static int bond_master_netdev_event(unsigned long event, |
3235 | struct net_device *bond_dev) | |
1da177e4 | 3236 | { |
454d7c9b | 3237 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3238 | |
3239 | switch (event) { | |
3240 | case NETDEV_CHANGENAME: | |
3241 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3242 | default: |
3243 | break; | |
3244 | } | |
3245 | ||
3246 | return NOTIFY_DONE; | |
3247 | } | |
3248 | ||
3d632c3f SH |
3249 | static int bond_slave_netdev_event(unsigned long event, |
3250 | struct net_device *slave_dev) | |
1da177e4 LT |
3251 | { |
3252 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3253 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3254 | |
3255 | switch (event) { | |
3256 | case NETDEV_UNREGISTER: | |
3257 | if (bond_dev) { | |
1284cd3a JV |
3258 | if (bond->setup_by_slave) |
3259 | bond_release_and_destroy(bond_dev, slave_dev); | |
3260 | else | |
3261 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3262 | } |
3263 | break; | |
3264 | case NETDEV_CHANGE: | |
17d04500 JV |
3265 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3266 | struct slave *slave; | |
3267 | ||
3268 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3269 | if (slave) { | |
5d30530e | 3270 | u32 old_speed = slave->speed; |
65cce19c | 3271 | u8 old_duplex = slave->duplex; |
17d04500 JV |
3272 | |
3273 | bond_update_speed_duplex(slave); | |
3274 | ||
3275 | if (bond_is_lb(bond)) | |
3276 | break; | |
3277 | ||
3278 | if (old_speed != slave->speed) | |
3279 | bond_3ad_adapter_speed_changed(slave); | |
3280 | if (old_duplex != slave->duplex) | |
3281 | bond_3ad_adapter_duplex_changed(slave); | |
3282 | } | |
3283 | } | |
3284 | ||
1da177e4 LT |
3285 | break; |
3286 | case NETDEV_DOWN: | |
3287 | /* | |
3288 | * ... Or is it this? | |
3289 | */ | |
3290 | break; | |
3291 | case NETDEV_CHANGEMTU: | |
3292 | /* | |
3293 | * TODO: Should slaves be allowed to | |
3294 | * independently alter their MTU? For | |
3295 | * an active-backup bond, slaves need | |
3296 | * not be the same type of device, so | |
3297 | * MTUs may vary. For other modes, | |
3298 | * slaves arguably should have the | |
3299 | * same MTUs. To do this, we'd need to | |
3300 | * take over the slave's change_mtu | |
3301 | * function for the duration of their | |
3302 | * servitude. | |
3303 | */ | |
3304 | break; | |
3305 | case NETDEV_CHANGENAME: | |
3306 | /* | |
3307 | * TODO: handle changing the primary's name | |
3308 | */ | |
3309 | break; | |
8531c5ff AK |
3310 | case NETDEV_FEAT_CHANGE: |
3311 | bond_compute_features(bond); | |
3312 | break; | |
1da177e4 LT |
3313 | default: |
3314 | break; | |
3315 | } | |
3316 | ||
3317 | return NOTIFY_DONE; | |
3318 | } | |
3319 | ||
3320 | /* | |
3321 | * bond_netdev_event: handle netdev notifier chain events. | |
3322 | * | |
3323 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3324 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3325 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3326 | * dev_probe_lock). | |
3327 | */ | |
3d632c3f SH |
3328 | static int bond_netdev_event(struct notifier_block *this, |
3329 | unsigned long event, void *ptr) | |
1da177e4 LT |
3330 | { |
3331 | struct net_device *event_dev = (struct net_device *)ptr; | |
3332 | ||
5a03cdb7 | 3333 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3334 | event_dev ? event_dev->name : "None", |
3335 | event); | |
1da177e4 | 3336 | |
0b680e75 JV |
3337 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3338 | return NOTIFY_DONE; | |
3339 | ||
1da177e4 | 3340 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3341 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3342 | return bond_master_netdev_event(event, event_dev); |
3343 | } | |
3344 | ||
3345 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3346 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3347 | return bond_slave_netdev_event(event, event_dev); |
3348 | } | |
3349 | ||
3350 | return NOTIFY_DONE; | |
3351 | } | |
3352 | ||
c3ade5ca JV |
3353 | /* |
3354 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3355 | * | |
3356 | * We keep track of device IPs primarily to use as source addresses in | |
3357 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3358 | * | |
3359 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3360 | */ | |
3361 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3362 | { | |
3363 | struct in_ifaddr *ifa = ptr; | |
3364 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3365 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3366 | struct bonding *bond; |
3367 | struct vlan_entry *vlan; | |
c3ade5ca | 3368 | |
ec87fd3b | 3369 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3370 | if (bond->dev == event_dev) { |
3371 | switch (event) { | |
3372 | case NETDEV_UP: | |
3373 | bond->master_ip = ifa->ifa_local; | |
3374 | return NOTIFY_OK; | |
3375 | case NETDEV_DOWN: | |
3376 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3377 | return NOTIFY_OK; | |
3378 | default: | |
3379 | return NOTIFY_DONE; | |
3380 | } | |
3381 | } | |
3382 | ||
0883beca | 3383 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
3384 | if (!bond->vlgrp) |
3385 | continue; | |
5c15bdec | 3386 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3387 | if (vlan_dev == event_dev) { |
3388 | switch (event) { | |
3389 | case NETDEV_UP: | |
3390 | vlan->vlan_ip = ifa->ifa_local; | |
3391 | return NOTIFY_OK; | |
3392 | case NETDEV_DOWN: | |
3393 | vlan->vlan_ip = | |
3394 | bond_glean_dev_ip(vlan_dev); | |
3395 | return NOTIFY_OK; | |
3396 | default: | |
3397 | return NOTIFY_DONE; | |
3398 | } | |
3399 | } | |
3400 | } | |
3401 | } | |
3402 | return NOTIFY_DONE; | |
3403 | } | |
3404 | ||
1da177e4 LT |
3405 | static struct notifier_block bond_netdev_notifier = { |
3406 | .notifier_call = bond_netdev_event, | |
3407 | }; | |
3408 | ||
c3ade5ca JV |
3409 | static struct notifier_block bond_inetaddr_notifier = { |
3410 | .notifier_call = bond_inetaddr_event, | |
3411 | }; | |
3412 | ||
169a3e66 JV |
3413 | /*---------------------------- Hashing Policies -----------------------------*/ |
3414 | ||
6f6652be JV |
3415 | /* |
3416 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3417 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3418 | */ | |
a361c83c | 3419 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3420 | { |
3421 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3422 | struct iphdr *iph = ip_hdr(skb); | |
3423 | ||
f14c4e4e | 3424 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3425 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3426 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3427 | } |
3428 | ||
d3da6831 | 3429 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3430 | } |
3431 | ||
169a3e66 | 3432 | /* |
59c51591 | 3433 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3434 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3435 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3436 | */ | |
a361c83c | 3437 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3438 | { |
3439 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3440 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3441 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3442 | int layer4_xor = 0; |
3443 | ||
f14c4e4e | 3444 | if (skb->protocol == htons(ETH_P_IP)) { |
56f8a75c | 3445 | if (!ip_is_fragment(iph) && |
169a3e66 JV |
3446 | (iph->protocol == IPPROTO_TCP || |
3447 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3448 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3449 | } |
3450 | return (layer4_xor ^ | |
3451 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3452 | ||
3453 | } | |
3454 | ||
d3da6831 | 3455 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3456 | } |
3457 | ||
3458 | /* | |
3459 | * Hash for the output device based upon layer 2 data | |
3460 | */ | |
a361c83c | 3461 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3462 | { |
3463 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3464 | ||
d3da6831 | 3465 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3466 | } |
3467 | ||
1da177e4 LT |
3468 | /*-------------------------- Device entry points ----------------------------*/ |
3469 | ||
3470 | static int bond_open(struct net_device *bond_dev) | |
3471 | { | |
454d7c9b | 3472 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3473 | |
3474 | bond->kill_timers = 0; | |
3475 | ||
5a37e8ca FL |
3476 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3477 | ||
58402054 | 3478 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3479 | /* bond_alb_initialize must be called before the timer |
3480 | * is started. | |
3481 | */ | |
3482 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3483 | /* something went wrong - fail the open operation */ | |
b473946a | 3484 | return -ENOMEM; |
1da177e4 LT |
3485 | } |
3486 | ||
1b76b316 JV |
3487 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3488 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3489 | } |
3490 | ||
3491 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3492 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3493 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3494 | } |
3495 | ||
3496 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3497 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3498 | INIT_DELAYED_WORK(&bond->arp_work, | |
3499 | bond_activebackup_arp_mon); | |
3500 | else | |
3501 | INIT_DELAYED_WORK(&bond->arp_work, | |
3502 | bond_loadbalance_arp_mon); | |
3503 | ||
3504 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3505 | if (bond->params.arp_validate) |
3aba891d | 3506 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3507 | } |
3508 | ||
3509 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3510 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3511 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3512 | /* register to receive LACPDUs */ |
3aba891d | 3513 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3514 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3515 | } |
3516 | ||
3517 | return 0; | |
3518 | } | |
3519 | ||
3520 | static int bond_close(struct net_device *bond_dev) | |
3521 | { | |
454d7c9b | 3522 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3523 | |
1da177e4 LT |
3524 | write_lock_bh(&bond->lock); |
3525 | ||
ad246c99 BH |
3526 | bond->send_peer_notif = 0; |
3527 | ||
1da177e4 LT |
3528 | /* signal timers not to re-arm */ |
3529 | bond->kill_timers = 1; | |
3530 | ||
3531 | write_unlock_bh(&bond->lock); | |
3532 | ||
1da177e4 | 3533 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3534 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3535 | } |
3536 | ||
3537 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3538 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3539 | } |
3540 | ||
3541 | switch (bond->params.mode) { | |
3542 | case BOND_MODE_8023AD: | |
1b76b316 | 3543 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3544 | break; |
3545 | case BOND_MODE_TLB: | |
3546 | case BOND_MODE_ALB: | |
1b76b316 | 3547 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3548 | break; |
3549 | default: | |
3550 | break; | |
3551 | } | |
3552 | ||
5a37e8ca FL |
3553 | if (delayed_work_pending(&bond->mcast_work)) |
3554 | cancel_delayed_work(&bond->mcast_work); | |
1da177e4 | 3555 | |
58402054 | 3556 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3557 | /* Must be called only after all |
3558 | * slaves have been released | |
3559 | */ | |
3560 | bond_alb_deinitialize(bond); | |
3561 | } | |
3aba891d | 3562 | bond->recv_probe = NULL; |
1da177e4 LT |
3563 | |
3564 | return 0; | |
3565 | } | |
3566 | ||
28172739 ED |
3567 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3568 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3569 | { |
454d7c9b | 3570 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3571 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3572 | struct slave *slave; |
3573 | int i; | |
3574 | ||
28172739 | 3575 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3576 | |
3577 | read_lock_bh(&bond->lock); | |
3578 | ||
3579 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3580 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3581 | dev_get_stats(slave->dev, &temp); |
3582 | ||
3583 | stats->rx_packets += sstats->rx_packets; | |
3584 | stats->rx_bytes += sstats->rx_bytes; | |
3585 | stats->rx_errors += sstats->rx_errors; | |
3586 | stats->rx_dropped += sstats->rx_dropped; | |
3587 | ||
3588 | stats->tx_packets += sstats->tx_packets; | |
3589 | stats->tx_bytes += sstats->tx_bytes; | |
3590 | stats->tx_errors += sstats->tx_errors; | |
3591 | stats->tx_dropped += sstats->tx_dropped; | |
3592 | ||
3593 | stats->multicast += sstats->multicast; | |
3594 | stats->collisions += sstats->collisions; | |
3595 | ||
3596 | stats->rx_length_errors += sstats->rx_length_errors; | |
3597 | stats->rx_over_errors += sstats->rx_over_errors; | |
3598 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3599 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3600 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3601 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3602 | ||
3603 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3604 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3605 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3606 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3607 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3608 | } |
3609 | ||
1da177e4 LT |
3610 | read_unlock_bh(&bond->lock); |
3611 | ||
3612 | return stats; | |
3613 | } | |
3614 | ||
3615 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3616 | { | |
3617 | struct net_device *slave_dev = NULL; | |
3618 | struct ifbond k_binfo; | |
3619 | struct ifbond __user *u_binfo = NULL; | |
3620 | struct ifslave k_sinfo; | |
3621 | struct ifslave __user *u_sinfo = NULL; | |
3622 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3623 | int res = 0; |
3624 | ||
a4aee5c8 | 3625 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3626 | |
3627 | switch (cmd) { | |
1da177e4 LT |
3628 | case SIOCGMIIPHY: |
3629 | mii = if_mii(ifr); | |
3d632c3f | 3630 | if (!mii) |
1da177e4 | 3631 | return -EINVAL; |
3d632c3f | 3632 | |
1da177e4 LT |
3633 | mii->phy_id = 0; |
3634 | /* Fall Through */ | |
3635 | case SIOCGMIIREG: | |
3636 | /* | |
3637 | * We do this again just in case we were called by SIOCGMIIREG | |
3638 | * instead of SIOCGMIIPHY. | |
3639 | */ | |
3640 | mii = if_mii(ifr); | |
3d632c3f | 3641 | if (!mii) |
1da177e4 | 3642 | return -EINVAL; |
3d632c3f | 3643 | |
1da177e4 LT |
3644 | |
3645 | if (mii->reg_num == 1) { | |
454d7c9b | 3646 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3647 | mii->val_out = 0; |
6603a6f2 | 3648 | read_lock(&bond->lock); |
1da177e4 | 3649 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3650 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3651 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3652 | |
1da177e4 | 3653 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3654 | read_unlock(&bond->lock); |
1da177e4 LT |
3655 | } |
3656 | ||
3657 | return 0; | |
3658 | case BOND_INFO_QUERY_OLD: | |
3659 | case SIOCBONDINFOQUERY: | |
3660 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3661 | ||
3d632c3f | 3662 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3663 | return -EFAULT; |
1da177e4 LT |
3664 | |
3665 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3666 | if (res == 0 && |
3667 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3668 | return -EFAULT; | |
1da177e4 LT |
3669 | |
3670 | return res; | |
3671 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3672 | case SIOCBONDSLAVEINFOQUERY: | |
3673 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3674 | ||
3d632c3f | 3675 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3676 | return -EFAULT; |
1da177e4 LT |
3677 | |
3678 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3679 | if (res == 0 && |
3680 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3681 | return -EFAULT; | |
1da177e4 LT |
3682 | |
3683 | return res; | |
3684 | default: | |
3685 | /* Go on */ | |
3686 | break; | |
3687 | } | |
3688 | ||
3d632c3f | 3689 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3690 | return -EPERM; |
1da177e4 | 3691 | |
ec87fd3b | 3692 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3693 | |
a4aee5c8 | 3694 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3695 | |
3d632c3f | 3696 | if (!slave_dev) |
1da177e4 | 3697 | res = -ENODEV; |
3d632c3f | 3698 | else { |
a4aee5c8 | 3699 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3700 | switch (cmd) { |
3701 | case BOND_ENSLAVE_OLD: | |
3702 | case SIOCBONDENSLAVE: | |
3703 | res = bond_enslave(bond_dev, slave_dev); | |
3704 | break; | |
3705 | case BOND_RELEASE_OLD: | |
3706 | case SIOCBONDRELEASE: | |
3707 | res = bond_release(bond_dev, slave_dev); | |
3708 | break; | |
3709 | case BOND_SETHWADDR_OLD: | |
3710 | case SIOCBONDSETHWADDR: | |
3711 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3712 | break; | |
3713 | case BOND_CHANGE_ACTIVE_OLD: | |
3714 | case SIOCBONDCHANGEACTIVE: | |
3715 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3716 | break; | |
3717 | default: | |
3718 | res = -EOPNOTSUPP; | |
3719 | } | |
3720 | ||
3721 | dev_put(slave_dev); | |
3722 | } | |
3723 | ||
1da177e4 LT |
3724 | return res; |
3725 | } | |
3726 | ||
22bedad3 JP |
3727 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3728 | struct netdev_hw_addr_list *list, | |
3729 | int addrlen) | |
3730 | { | |
3731 | struct netdev_hw_addr *ha; | |
3732 | ||
3733 | netdev_hw_addr_list_for_each(ha, list) | |
3734 | if (!memcmp(ha->addr, addr, addrlen)) | |
3735 | return true; | |
3736 | ||
3737 | return false; | |
3738 | } | |
3739 | ||
1da177e4 LT |
3740 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3741 | { | |
454d7c9b | 3742 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 JP |
3743 | struct netdev_hw_addr *ha; |
3744 | bool found; | |
1da177e4 | 3745 | |
1da177e4 LT |
3746 | /* |
3747 | * Do promisc before checking multicast_mode | |
3748 | */ | |
3d632c3f | 3749 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
3750 | /* |
3751 | * FIXME: Need to handle the error when one of the multi-slaves | |
3752 | * encounters error. | |
3753 | */ | |
1da177e4 | 3754 | bond_set_promiscuity(bond, 1); |
1da177e4 | 3755 | |
3d632c3f SH |
3756 | |
3757 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 3758 | bond_set_promiscuity(bond, -1); |
3d632c3f | 3759 | |
1da177e4 LT |
3760 | |
3761 | /* set allmulti flag to slaves */ | |
3d632c3f | 3762 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
3763 | /* |
3764 | * FIXME: Need to handle the error when one of the multi-slaves | |
3765 | * encounters error. | |
3766 | */ | |
1da177e4 | 3767 | bond_set_allmulti(bond, 1); |
1da177e4 | 3768 | |
3d632c3f SH |
3769 | |
3770 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 3771 | bond_set_allmulti(bond, -1); |
3d632c3f | 3772 | |
1da177e4 | 3773 | |
80ee5ad2 JV |
3774 | read_lock(&bond->lock); |
3775 | ||
1da177e4 LT |
3776 | bond->flags = bond_dev->flags; |
3777 | ||
3778 | /* looking for addresses to add to slaves' mc list */ | |
22bedad3 JP |
3779 | netdev_for_each_mc_addr(ha, bond_dev) { |
3780 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3781 | bond_dev->addr_len); | |
3782 | if (!found) | |
3783 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3784 | } |
3785 | ||
3786 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3787 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3788 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3789 | bond_dev->addr_len); | |
3790 | if (!found) | |
3791 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3792 | } |
3793 | ||
3794 | /* save master's multicast list */ | |
22bedad3 JP |
3795 | __hw_addr_flush(&bond->mc_list); |
3796 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3797 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3798 | |
80ee5ad2 | 3799 | read_unlock(&bond->lock); |
1da177e4 LT |
3800 | } |
3801 | ||
00829823 SH |
3802 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3803 | { | |
3804 | struct bonding *bond = netdev_priv(dev); | |
3805 | struct slave *slave = bond->first_slave; | |
3806 | ||
3807 | if (slave) { | |
3808 | const struct net_device_ops *slave_ops | |
3809 | = slave->dev->netdev_ops; | |
3810 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3811 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3812 | } |
3813 | return 0; | |
3814 | } | |
3815 | ||
1da177e4 LT |
3816 | /* |
3817 | * Change the MTU of all of a master's slaves to match the master | |
3818 | */ | |
3819 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3820 | { | |
454d7c9b | 3821 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3822 | struct slave *slave, *stop_at; |
3823 | int res = 0; | |
3824 | int i; | |
3825 | ||
5a03cdb7 | 3826 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3827 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3828 | |
3829 | /* Can't hold bond->lock with bh disabled here since | |
3830 | * some base drivers panic. On the other hand we can't | |
3831 | * hold bond->lock without bh disabled because we'll | |
3832 | * deadlock. The only solution is to rely on the fact | |
3833 | * that we're under rtnl_lock here, and the slaves | |
3834 | * list won't change. This doesn't solve the problem | |
3835 | * of setting the slave's MTU while it is | |
3836 | * transmitting, but the assumption is that the base | |
3837 | * driver can handle that. | |
3838 | * | |
3839 | * TODO: figure out a way to safely iterate the slaves | |
3840 | * list, but without holding a lock around the actual | |
3841 | * call to the base driver. | |
3842 | */ | |
3843 | ||
3844 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3845 | pr_debug("s %p s->p %p c_m %p\n", |
3846 | slave, | |
3847 | slave->prev, | |
3848 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3849 | |
1da177e4 LT |
3850 | res = dev_set_mtu(slave->dev, new_mtu); |
3851 | ||
3852 | if (res) { | |
3853 | /* If we failed to set the slave's mtu to the new value | |
3854 | * we must abort the operation even in ACTIVE_BACKUP | |
3855 | * mode, because if we allow the backup slaves to have | |
3856 | * different mtu values than the active slave we'll | |
3857 | * need to change their mtu when doing a failover. That | |
3858 | * means changing their mtu from timer context, which | |
3859 | * is probably not a good idea. | |
3860 | */ | |
5a03cdb7 | 3861 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3862 | goto unwind; |
3863 | } | |
3864 | } | |
3865 | ||
3866 | bond_dev->mtu = new_mtu; | |
3867 | ||
3868 | return 0; | |
3869 | ||
3870 | unwind: | |
3871 | /* unwind from head to the slave that failed */ | |
3872 | stop_at = slave; | |
3873 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3874 | int tmp_res; | |
3875 | ||
3876 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3877 | if (tmp_res) { | |
a4aee5c8 JP |
3878 | pr_debug("unwind err %d dev %s\n", |
3879 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3880 | } |
3881 | } | |
3882 | ||
3883 | return res; | |
3884 | } | |
3885 | ||
3886 | /* | |
3887 | * Change HW address | |
3888 | * | |
3889 | * Note that many devices must be down to change the HW address, and | |
3890 | * downing the master releases all slaves. We can make bonds full of | |
3891 | * bonding devices to test this, however. | |
3892 | */ | |
3893 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3894 | { | |
454d7c9b | 3895 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3896 | struct sockaddr *sa = addr, tmp_sa; |
3897 | struct slave *slave, *stop_at; | |
3898 | int res = 0; | |
3899 | int i; | |
3900 | ||
eb7cc59a SH |
3901 | if (bond->params.mode == BOND_MODE_ALB) |
3902 | return bond_alb_set_mac_address(bond_dev, addr); | |
3903 | ||
3904 | ||
a4aee5c8 JP |
3905 | pr_debug("bond=%p, name=%s\n", |
3906 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3907 | |
dd957c57 | 3908 | /* |
3915c1e8 JV |
3909 | * If fail_over_mac is set to active, do nothing and return |
3910 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3911 | */ |
3915c1e8 | 3912 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3913 | return 0; |
2ab82852 | 3914 | |
3d632c3f | 3915 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3916 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3917 | |
3918 | /* Can't hold bond->lock with bh disabled here since | |
3919 | * some base drivers panic. On the other hand we can't | |
3920 | * hold bond->lock without bh disabled because we'll | |
3921 | * deadlock. The only solution is to rely on the fact | |
3922 | * that we're under rtnl_lock here, and the slaves | |
3923 | * list won't change. This doesn't solve the problem | |
3924 | * of setting the slave's hw address while it is | |
3925 | * transmitting, but the assumption is that the base | |
3926 | * driver can handle that. | |
3927 | * | |
3928 | * TODO: figure out a way to safely iterate the slaves | |
3929 | * list, but without holding a lock around the actual | |
3930 | * call to the base driver. | |
3931 | */ | |
3932 | ||
3933 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3934 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3935 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3936 | |
eb7cc59a | 3937 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3938 | res = -EOPNOTSUPP; |
5a03cdb7 | 3939 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3940 | goto unwind; |
3941 | } | |
3942 | ||
3943 | res = dev_set_mac_address(slave->dev, addr); | |
3944 | if (res) { | |
3945 | /* TODO: consider downing the slave | |
3946 | * and retry ? | |
3947 | * User should expect communications | |
3948 | * breakage anyway until ARP finish | |
3949 | * updating, so... | |
3950 | */ | |
5a03cdb7 | 3951 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3952 | goto unwind; |
3953 | } | |
3954 | } | |
3955 | ||
3956 | /* success */ | |
3957 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3958 | return 0; | |
3959 | ||
3960 | unwind: | |
3961 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3962 | tmp_sa.sa_family = bond_dev->type; | |
3963 | ||
3964 | /* unwind from head to the slave that failed */ | |
3965 | stop_at = slave; | |
3966 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3967 | int tmp_res; | |
3968 | ||
3969 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3970 | if (tmp_res) { | |
a4aee5c8 JP |
3971 | pr_debug("unwind err %d dev %s\n", |
3972 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3973 | } |
3974 | } | |
3975 | ||
3976 | return res; | |
3977 | } | |
3978 | ||
3979 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3980 | { | |
454d7c9b | 3981 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3982 | struct slave *slave, *start_at; |
cf5f9044 | 3983 | int i, slave_no, res = 1; |
a2fd940f | 3984 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3985 | |
cf5f9044 | 3986 | /* |
a2fd940f AG |
3987 | * Start with the curr_active_slave that joined the bond as the |
3988 | * default for sending IGMP traffic. For failover purposes one | |
3989 | * needs to maintain some consistency for the interface that will | |
3990 | * send the join/membership reports. The curr_active_slave found | |
3991 | * will send all of this type of traffic. | |
cf5f9044 | 3992 | */ |
00ae7028 | 3993 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3994 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3995 | |
a2fd940f AG |
3996 | read_lock(&bond->curr_slave_lock); |
3997 | slave = bond->curr_active_slave; | |
3998 | read_unlock(&bond->curr_slave_lock); | |
3999 | ||
4000 | if (!slave) | |
4001 | goto out; | |
4002 | } else { | |
4003 | /* | |
4004 | * Concurrent TX may collide on rr_tx_counter; we accept | |
4005 | * that as being rare enough not to justify using an | |
4006 | * atomic op here. | |
4007 | */ | |
4008 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
4009 | ||
4010 | bond_for_each_slave(bond, slave, i) { | |
4011 | slave_no--; | |
4012 | if (slave_no < 0) | |
4013 | break; | |
4014 | } | |
1da177e4 LT |
4015 | } |
4016 | ||
cf5f9044 | 4017 | start_at = slave; |
1da177e4 LT |
4018 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4019 | if (IS_UP(slave->dev) && | |
4020 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4021 | bond_is_active_slave(slave)) { |
1da177e4 | 4022 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
4023 | break; |
4024 | } | |
4025 | } | |
4026 | ||
1da177e4 LT |
4027 | out: |
4028 | if (res) { | |
4029 | /* no suitable interface, frame not sent */ | |
4030 | dev_kfree_skb(skb); | |
4031 | } | |
0693e88e | 4032 | |
ec634fe3 | 4033 | return NETDEV_TX_OK; |
1da177e4 LT |
4034 | } |
4035 | ||
075897ce | 4036 | |
1da177e4 LT |
4037 | /* |
4038 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4039 | * the bond has a usable interface. | |
4040 | */ | |
4041 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4042 | { | |
454d7c9b | 4043 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4044 | int res = 1; |
4045 | ||
1da177e4 LT |
4046 | read_lock(&bond->curr_slave_lock); |
4047 | ||
0693e88e MM |
4048 | if (bond->curr_active_slave) |
4049 | res = bond_dev_queue_xmit(bond, skb, | |
4050 | bond->curr_active_slave->dev); | |
1da177e4 | 4051 | |
3d632c3f | 4052 | if (res) |
1da177e4 LT |
4053 | /* no suitable interface, frame not sent */ |
4054 | dev_kfree_skb(skb); | |
3d632c3f | 4055 | |
1da177e4 | 4056 | read_unlock(&bond->curr_slave_lock); |
0693e88e | 4057 | |
ec634fe3 | 4058 | return NETDEV_TX_OK; |
1da177e4 LT |
4059 | } |
4060 | ||
4061 | /* | |
169a3e66 JV |
4062 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4063 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4064 | * find the next active slave. | |
1da177e4 LT |
4065 | */ |
4066 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4067 | { | |
454d7c9b | 4068 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4069 | struct slave *slave, *start_at; |
4070 | int slave_no; | |
4071 | int i; | |
4072 | int res = 1; | |
4073 | ||
a361c83c | 4074 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4075 | |
4076 | bond_for_each_slave(bond, slave, i) { | |
4077 | slave_no--; | |
3d632c3f | 4078 | if (slave_no < 0) |
1da177e4 | 4079 | break; |
1da177e4 LT |
4080 | } |
4081 | ||
4082 | start_at = slave; | |
4083 | ||
4084 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4085 | if (IS_UP(slave->dev) && | |
4086 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4087 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4088 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4089 | break; | |
4090 | } | |
4091 | } | |
4092 | ||
1da177e4 LT |
4093 | if (res) { |
4094 | /* no suitable interface, frame not sent */ | |
4095 | dev_kfree_skb(skb); | |
4096 | } | |
0693e88e | 4097 | |
ec634fe3 | 4098 | return NETDEV_TX_OK; |
1da177e4 LT |
4099 | } |
4100 | ||
4101 | /* | |
4102 | * in broadcast mode, we send everything to all usable interfaces. | |
4103 | */ | |
4104 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4105 | { | |
454d7c9b | 4106 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4107 | struct slave *slave, *start_at; |
4108 | struct net_device *tx_dev = NULL; | |
4109 | int i; | |
4110 | int res = 1; | |
4111 | ||
1da177e4 LT |
4112 | read_lock(&bond->curr_slave_lock); |
4113 | start_at = bond->curr_active_slave; | |
4114 | read_unlock(&bond->curr_slave_lock); | |
4115 | ||
3d632c3f | 4116 | if (!start_at) |
1da177e4 | 4117 | goto out; |
1da177e4 LT |
4118 | |
4119 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4120 | if (IS_UP(slave->dev) && | |
4121 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4122 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4123 | if (tx_dev) { |
4124 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4125 | if (!skb2) { | |
a4aee5c8 | 4126 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4127 | bond_dev->name); |
1da177e4 LT |
4128 | continue; |
4129 | } | |
4130 | ||
4131 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4132 | if (res) { | |
4133 | dev_kfree_skb(skb2); | |
4134 | continue; | |
4135 | } | |
4136 | } | |
4137 | tx_dev = slave->dev; | |
4138 | } | |
4139 | } | |
4140 | ||
3d632c3f | 4141 | if (tx_dev) |
1da177e4 | 4142 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4143 | |
4144 | out: | |
3d632c3f | 4145 | if (res) |
1da177e4 LT |
4146 | /* no suitable interface, frame not sent */ |
4147 | dev_kfree_skb(skb); | |
3d632c3f | 4148 | |
1da177e4 | 4149 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4150 | return NETDEV_TX_OK; |
1da177e4 LT |
4151 | } |
4152 | ||
4153 | /*------------------------- Device initialization ---------------------------*/ | |
4154 | ||
6f6652be JV |
4155 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4156 | { | |
4157 | switch (bond->params.xmit_policy) { | |
4158 | case BOND_XMIT_POLICY_LAYER23: | |
4159 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4160 | break; | |
4161 | case BOND_XMIT_POLICY_LAYER34: | |
4162 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4163 | break; | |
4164 | case BOND_XMIT_POLICY_LAYER2: | |
4165 | default: | |
4166 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4167 | break; | |
4168 | } | |
4169 | } | |
4170 | ||
bb1d9123 AG |
4171 | /* |
4172 | * Lookup the slave that corresponds to a qid | |
4173 | */ | |
4174 | static inline int bond_slave_override(struct bonding *bond, | |
4175 | struct sk_buff *skb) | |
4176 | { | |
4177 | int i, res = 1; | |
4178 | struct slave *slave = NULL; | |
4179 | struct slave *check_slave; | |
4180 | ||
0693e88e MM |
4181 | if (!skb->queue_mapping) |
4182 | return 1; | |
bb1d9123 AG |
4183 | |
4184 | /* Find out if any slaves have the same mapping as this skb. */ | |
4185 | bond_for_each_slave(bond, check_slave, i) { | |
4186 | if (check_slave->queue_id == skb->queue_mapping) { | |
4187 | slave = check_slave; | |
4188 | break; | |
4189 | } | |
4190 | } | |
4191 | ||
4192 | /* If the slave isn't UP, use default transmit policy. */ | |
4193 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4194 | (slave->link == BOND_LINK_UP)) { | |
4195 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4196 | } | |
4197 | ||
bb1d9123 AG |
4198 | return res; |
4199 | } | |
4200 | ||
374eeb5a | 4201 | |
bb1d9123 AG |
4202 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4203 | { | |
4204 | /* | |
4205 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4206 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4207 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4208 | * way down to the bonding driver. | |
4209 | */ | |
fd0e435b PO |
4210 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4211 | ||
374eeb5a NH |
4212 | /* |
4213 | * Save the original txq to restore before passing to the driver | |
4214 | */ | |
4215 | bond_queue_mapping(skb) = skb->queue_mapping; | |
4216 | ||
fd0e435b | 4217 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4218 | do { |
fd0e435b | 4219 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4220 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4221 | } |
4222 | return txq; | |
bb1d9123 AG |
4223 | } |
4224 | ||
0693e88e | 4225 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4226 | { |
bb1d9123 AG |
4227 | struct bonding *bond = netdev_priv(dev); |
4228 | ||
4229 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4230 | if (!bond_slave_override(bond, skb)) | |
4231 | return NETDEV_TX_OK; | |
4232 | } | |
00829823 SH |
4233 | |
4234 | switch (bond->params.mode) { | |
4235 | case BOND_MODE_ROUNDROBIN: | |
4236 | return bond_xmit_roundrobin(skb, dev); | |
4237 | case BOND_MODE_ACTIVEBACKUP: | |
4238 | return bond_xmit_activebackup(skb, dev); | |
4239 | case BOND_MODE_XOR: | |
4240 | return bond_xmit_xor(skb, dev); | |
4241 | case BOND_MODE_BROADCAST: | |
4242 | return bond_xmit_broadcast(skb, dev); | |
4243 | case BOND_MODE_8023AD: | |
4244 | return bond_3ad_xmit_xor(skb, dev); | |
4245 | case BOND_MODE_ALB: | |
4246 | case BOND_MODE_TLB: | |
4247 | return bond_alb_xmit(skb, dev); | |
4248 | default: | |
4249 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4250 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4251 | dev->name, bond->params.mode); | |
00829823 SH |
4252 | WARN_ON_ONCE(1); |
4253 | dev_kfree_skb(skb); | |
4254 | return NETDEV_TX_OK; | |
4255 | } | |
4256 | } | |
4257 | ||
0693e88e MM |
4258 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4259 | { | |
4260 | struct bonding *bond = netdev_priv(dev); | |
4261 | netdev_tx_t ret = NETDEV_TX_OK; | |
4262 | ||
4263 | /* | |
4264 | * If we risk deadlock from transmitting this in the | |
4265 | * netpoll path, tell netpoll to queue the frame for later tx | |
4266 | */ | |
4267 | if (is_netpoll_tx_blocked(dev)) | |
4268 | return NETDEV_TX_BUSY; | |
4269 | ||
4270 | read_lock(&bond->lock); | |
4271 | ||
4272 | if (bond->slave_cnt) | |
4273 | ret = __bond_start_xmit(skb, dev); | |
4274 | else | |
4275 | dev_kfree_skb(skb); | |
4276 | ||
4277 | read_unlock(&bond->lock); | |
4278 | ||
4279 | return ret; | |
4280 | } | |
00829823 | 4281 | |
1da177e4 LT |
4282 | /* |
4283 | * set bond mode specific net device operations | |
4284 | */ | |
a77b5325 | 4285 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4286 | { |
169a3e66 JV |
4287 | struct net_device *bond_dev = bond->dev; |
4288 | ||
1da177e4 LT |
4289 | switch (mode) { |
4290 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4291 | break; |
4292 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4293 | break; |
4294 | case BOND_MODE_XOR: | |
6f6652be | 4295 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4296 | break; |
4297 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4298 | break; |
4299 | case BOND_MODE_8023AD: | |
6f6652be | 4300 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4301 | break; |
1da177e4 | 4302 | case BOND_MODE_ALB: |
8f903c70 JV |
4303 | /* FALLTHRU */ |
4304 | case BOND_MODE_TLB: | |
1da177e4 LT |
4305 | break; |
4306 | default: | |
4307 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4308 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4309 | bond_dev->name, mode); | |
1da177e4 LT |
4310 | break; |
4311 | } | |
4312 | } | |
4313 | ||
217df670 JV |
4314 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4315 | struct ethtool_drvinfo *drvinfo) | |
4316 | { | |
4317 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4318 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4319 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4320 | } | |
4321 | ||
7282d491 | 4322 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4323 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac | 4324 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4325 | }; |
4326 | ||
eb7cc59a | 4327 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4328 | .ndo_init = bond_init, |
9e71626c | 4329 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4330 | .ndo_open = bond_open, |
4331 | .ndo_stop = bond_close, | |
00829823 | 4332 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4333 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4334 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a SH |
4335 | .ndo_do_ioctl = bond_do_ioctl, |
4336 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4337 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4338 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4339 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4340 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4341 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4342 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
f6dc31a8 | 4343 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4344 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4345 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4346 | .ndo_poll_controller = bond_poll_controller, | |
4347 | #endif | |
9232ecca JP |
4348 | .ndo_add_slave = bond_enslave, |
4349 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4350 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4351 | }; |
4352 | ||
9e2e61fb AW |
4353 | static void bond_destructor(struct net_device *bond_dev) |
4354 | { | |
4355 | struct bonding *bond = netdev_priv(bond_dev); | |
4356 | if (bond->wq) | |
4357 | destroy_workqueue(bond->wq); | |
4358 | free_netdev(bond_dev); | |
4359 | } | |
4360 | ||
181470fc | 4361 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4362 | { |
454d7c9b | 4363 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4364 | |
1da177e4 LT |
4365 | /* initialize rwlocks */ |
4366 | rwlock_init(&bond->lock); | |
4367 | rwlock_init(&bond->curr_slave_lock); | |
4368 | ||
d2991f75 | 4369 | bond->params = bonding_defaults; |
1da177e4 LT |
4370 | |
4371 | /* Initialize pointers */ | |
1da177e4 LT |
4372 | bond->dev = bond_dev; |
4373 | INIT_LIST_HEAD(&bond->vlan_list); | |
4374 | ||
4375 | /* Initialize the device entry points */ | |
181470fc | 4376 | ether_setup(bond_dev); |
eb7cc59a | 4377 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4378 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4379 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4380 | |
9e2e61fb | 4381 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4382 | |
4383 | /* Initialize the device options */ | |
4384 | bond_dev->tx_queue_len = 0; | |
4385 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4386 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4387 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4388 | ||
1da177e4 LT |
4389 | /* At first, we block adding VLANs. That's the only way to |
4390 | * prevent problems that occur when adding VLANs over an | |
4391 | * empty bond. The block will be removed once non-challenged | |
4392 | * slaves are enslaved. | |
4393 | */ | |
4394 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4395 | ||
932ff279 | 4396 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4397 | * transmitting */ |
4398 | bond_dev->features |= NETIF_F_LLTX; | |
4399 | ||
4400 | /* By default, we declare the bond to be fully | |
4401 | * VLAN hardware accelerated capable. Special | |
4402 | * care is taken in the various xmit functions | |
4403 | * when there are slaves that are not hw accel | |
4404 | * capable | |
4405 | */ | |
1da177e4 | 4406 | |
b2a103e6 MM |
4407 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
4408 | NETIF_F_HW_VLAN_TX | | |
4409 | NETIF_F_HW_VLAN_RX | | |
4410 | NETIF_F_HW_VLAN_FILTER; | |
4411 | ||
4412 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_NO_CSUM); | |
4413 | bond_dev->features |= bond_dev->hw_features; | |
1da177e4 LT |
4414 | } |
4415 | ||
fdaea7a9 JV |
4416 | static void bond_work_cancel_all(struct bonding *bond) |
4417 | { | |
4418 | write_lock_bh(&bond->lock); | |
4419 | bond->kill_timers = 1; | |
4420 | write_unlock_bh(&bond->lock); | |
4421 | ||
4422 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4423 | cancel_delayed_work(&bond->mii_work); | |
4424 | ||
4425 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4426 | cancel_delayed_work(&bond->arp_work); | |
4427 | ||
4428 | if (bond->params.mode == BOND_MODE_ALB && | |
4429 | delayed_work_pending(&bond->alb_work)) | |
4430 | cancel_delayed_work(&bond->alb_work); | |
4431 | ||
4432 | if (bond->params.mode == BOND_MODE_8023AD && | |
4433 | delayed_work_pending(&bond->ad_work)) | |
4434 | cancel_delayed_work(&bond->ad_work); | |
5a37e8ca FL |
4435 | |
4436 | if (delayed_work_pending(&bond->mcast_work)) | |
4437 | cancel_delayed_work(&bond->mcast_work); | |
fdaea7a9 JV |
4438 | } |
4439 | ||
c67dfb29 EB |
4440 | /* |
4441 | * Destroy a bonding device. | |
4442 | * Must be under rtnl_lock when this function is called. | |
4443 | */ | |
4444 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4445 | { |
454d7c9b | 4446 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4447 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4448 | |
f6dc31a8 WC |
4449 | bond_netpoll_cleanup(bond_dev); |
4450 | ||
c67dfb29 EB |
4451 | /* Release the bonded slaves */ |
4452 | bond_release_all(bond_dev); | |
4453 | ||
a434e43f JV |
4454 | list_del(&bond->bond_list); |
4455 | ||
4456 | bond_work_cancel_all(bond); | |
4457 | ||
a434e43f | 4458 | bond_remove_proc_entry(bond); |
c67dfb29 | 4459 | |
f073c7ca TI |
4460 | bond_debug_unregister(bond); |
4461 | ||
22bedad3 | 4462 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4463 | |
4464 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4465 | list_del(&vlan->vlan_list); | |
4466 | kfree(vlan); | |
4467 | } | |
a434e43f JV |
4468 | } |
4469 | ||
1da177e4 LT |
4470 | /*------------------------- Module initialization ---------------------------*/ |
4471 | ||
4472 | /* | |
4473 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4474 | * number of the mode or its string name. A bit complicated because |
4475 | * some mode names are substrings of other names, and calls from sysfs | |
4476 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4477 | */ |
325dcf7a | 4478 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4479 | { |
54b87323 | 4480 | int modeint = -1, i, rv; |
a42e534f | 4481 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4482 | |
a42e534f JV |
4483 | for (p = (char *)buf; *p; p++) |
4484 | if (!(isdigit(*p) || isspace(*p))) | |
4485 | break; | |
4486 | ||
4487 | if (*p) | |
ece95f7f | 4488 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4489 | else |
54b87323 | 4490 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4491 | |
4492 | if (!rv) | |
4493 | return -1; | |
1da177e4 LT |
4494 | |
4495 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4496 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4497 | return tbl[i].mode; |
4498 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4499 | return tbl[i].mode; |
1da177e4 LT |
4500 | } |
4501 | ||
4502 | return -1; | |
4503 | } | |
4504 | ||
4505 | static int bond_check_params(struct bond_params *params) | |
4506 | { | |
a549952a | 4507 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4508 | |
1da177e4 LT |
4509 | /* |
4510 | * Convert string parameters. | |
4511 | */ | |
4512 | if (mode) { | |
4513 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4514 | if (bond_mode == -1) { | |
a4aee5c8 | 4515 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4516 | mode == NULL ? "NULL" : mode); |
4517 | return -EINVAL; | |
4518 | } | |
4519 | } | |
4520 | ||
169a3e66 JV |
4521 | if (xmit_hash_policy) { |
4522 | if ((bond_mode != BOND_MODE_XOR) && | |
4523 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4524 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4525 | bond_mode_name(bond_mode)); |
4526 | } else { | |
4527 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4528 | xmit_hashtype_tbl); | |
4529 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4530 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4531 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4532 | xmit_hash_policy); |
4533 | return -EINVAL; | |
4534 | } | |
4535 | } | |
4536 | } | |
4537 | ||
1da177e4 LT |
4538 | if (lacp_rate) { |
4539 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4540 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4541 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4542 | } else { |
4543 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4544 | if (lacp_fast == -1) { | |
a4aee5c8 | 4545 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4546 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4547 | return -EINVAL; | |
4548 | } | |
4549 | } | |
4550 | } | |
4551 | ||
fd989c83 JV |
4552 | if (ad_select) { |
4553 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4554 | if (params->ad_select == -1) { | |
a4aee5c8 | 4555 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4556 | ad_select == NULL ? "NULL" : ad_select); |
4557 | return -EINVAL; | |
4558 | } | |
4559 | ||
4560 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4561 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4562 | } |
4563 | } else { | |
4564 | params->ad_select = BOND_AD_STABLE; | |
4565 | } | |
4566 | ||
f5841306 | 4567 | if (max_bonds < 0) { |
a4aee5c8 JP |
4568 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4569 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4570 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4571 | } | |
4572 | ||
4573 | if (miimon < 0) { | |
a4aee5c8 JP |
4574 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4575 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4576 | miimon = BOND_LINK_MON_INTERV; |
4577 | } | |
4578 | ||
4579 | if (updelay < 0) { | |
a4aee5c8 JP |
4580 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4581 | updelay, INT_MAX); | |
1da177e4 LT |
4582 | updelay = 0; |
4583 | } | |
4584 | ||
4585 | if (downdelay < 0) { | |
a4aee5c8 JP |
4586 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4587 | downdelay, INT_MAX); | |
1da177e4 LT |
4588 | downdelay = 0; |
4589 | } | |
4590 | ||
4591 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4592 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4593 | use_carrier); | |
1da177e4 LT |
4594 | use_carrier = 1; |
4595 | } | |
4596 | ||
ad246c99 BH |
4597 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4598 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4599 | num_peer_notif); | |
4600 | num_peer_notif = 1; | |
4601 | } | |
4602 | ||
1da177e4 LT |
4603 | /* reset values for 802.3ad */ |
4604 | if (bond_mode == BOND_MODE_8023AD) { | |
4605 | if (!miimon) { | |
a4aee5c8 | 4606 | 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 | 4607 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4608 | miimon = 100; |
4609 | } | |
4610 | } | |
4611 | ||
bb1d9123 AG |
4612 | if (tx_queues < 1 || tx_queues > 255) { |
4613 | pr_warning("Warning: tx_queues (%d) should be between " | |
4614 | "1 and 255, resetting to %d\n", | |
4615 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4616 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4617 | } | |
4618 | ||
ebd8e497 AG |
4619 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4620 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4621 | "not of valid value (0/1), so it was set to " | |
4622 | "0\n", all_slaves_active); | |
4623 | all_slaves_active = 0; | |
4624 | } | |
4625 | ||
c2952c31 FL |
4626 | if (resend_igmp < 0 || resend_igmp > 255) { |
4627 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4628 | "0 and 255, resetting to %d\n", | |
4629 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4630 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4631 | } | |
4632 | ||
1da177e4 LT |
4633 | /* reset values for TLB/ALB */ |
4634 | if ((bond_mode == BOND_MODE_TLB) || | |
4635 | (bond_mode == BOND_MODE_ALB)) { | |
4636 | if (!miimon) { | |
a4aee5c8 | 4637 | 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 | 4638 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4639 | miimon = 100; |
4640 | } | |
4641 | } | |
4642 | ||
4643 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4644 | 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", |
4645 | updelay); | |
1da177e4 LT |
4646 | } |
4647 | ||
4648 | if (!miimon) { | |
4649 | if (updelay || downdelay) { | |
4650 | /* just warn the user the up/down delay will have | |
4651 | * no effect since miimon is zero... | |
4652 | */ | |
a4aee5c8 JP |
4653 | 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", |
4654 | updelay, downdelay); | |
1da177e4 LT |
4655 | } |
4656 | } else { | |
4657 | /* don't allow arp monitoring */ | |
4658 | if (arp_interval) { | |
a4aee5c8 JP |
4659 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4660 | miimon, arp_interval); | |
1da177e4 LT |
4661 | arp_interval = 0; |
4662 | } | |
4663 | ||
4664 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4665 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4666 | updelay, miimon, | |
4667 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4668 | } |
4669 | ||
4670 | updelay /= miimon; | |
4671 | ||
4672 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4673 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4674 | downdelay, miimon, | |
4675 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4676 | } |
4677 | ||
4678 | downdelay /= miimon; | |
4679 | } | |
4680 | ||
4681 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4682 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4683 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4684 | arp_interval = BOND_LINK_ARP_INTERV; |
4685 | } | |
4686 | ||
4687 | for (arp_ip_count = 0; | |
4688 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4689 | arp_ip_count++) { | |
4690 | /* not complete check, but should be good enough to | |
4691 | catch mistakes */ | |
4692 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4693 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4694 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4695 | arp_interval = 0; |
4696 | } else { | |
d3bb52b0 | 4697 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4698 | arp_target[arp_ip_count] = ip; |
4699 | } | |
4700 | } | |
4701 | ||
4702 | if (arp_interval && !arp_ip_count) { | |
4703 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4704 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4705 | arp_interval); | |
1da177e4 LT |
4706 | arp_interval = 0; |
4707 | } | |
4708 | ||
f5b2b966 JV |
4709 | if (arp_validate) { |
4710 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4711 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4712 | return -EINVAL; |
4713 | } | |
4714 | if (!arp_interval) { | |
a4aee5c8 | 4715 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4716 | return -EINVAL; |
4717 | } | |
4718 | ||
4719 | arp_validate_value = bond_parse_parm(arp_validate, | |
4720 | arp_validate_tbl); | |
4721 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4722 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4723 | arp_validate == NULL ? "NULL" : arp_validate); |
4724 | return -EINVAL; | |
4725 | } | |
4726 | } else | |
4727 | arp_validate_value = 0; | |
4728 | ||
1da177e4 | 4729 | if (miimon) { |
a4aee5c8 | 4730 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4731 | } else if (arp_interval) { |
4732 | int i; | |
4733 | ||
a4aee5c8 JP |
4734 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4735 | arp_interval, | |
4736 | arp_validate_tbl[arp_validate_value].modename, | |
4737 | arp_ip_count); | |
1da177e4 LT |
4738 | |
4739 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4740 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4741 | |
e5e2a8fd | 4742 | pr_info("\n"); |
1da177e4 | 4743 | |
b8a9787e | 4744 | } else if (max_bonds) { |
1da177e4 LT |
4745 | /* miimon and arp_interval not set, we need one so things |
4746 | * work as expected, see bonding.txt for details | |
4747 | */ | |
a4aee5c8 | 4748 | 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 |
4749 | } |
4750 | ||
4751 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4752 | /* currently, using a primary only makes sense | |
4753 | * in active backup, TLB or ALB modes | |
4754 | */ | |
a4aee5c8 JP |
4755 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4756 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4757 | primary = NULL; |
4758 | } | |
4759 | ||
a549952a JP |
4760 | if (primary && primary_reselect) { |
4761 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4762 | pri_reselect_tbl); | |
4763 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4764 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4765 | primary_reselect == |
4766 | NULL ? "NULL" : primary_reselect); | |
4767 | return -EINVAL; | |
4768 | } | |
4769 | } else { | |
4770 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4771 | } | |
4772 | ||
3915c1e8 JV |
4773 | if (fail_over_mac) { |
4774 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4775 | fail_over_mac_tbl); | |
4776 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4777 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4778 | arp_validate == NULL ? "NULL" : arp_validate); |
4779 | return -EINVAL; | |
4780 | } | |
4781 | ||
4782 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4783 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4784 | } else { |
4785 | fail_over_mac_value = BOND_FOM_NONE; | |
4786 | } | |
dd957c57 | 4787 | |
1da177e4 LT |
4788 | /* fill params struct with the proper values */ |
4789 | params->mode = bond_mode; | |
169a3e66 | 4790 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4791 | params->miimon = miimon; |
ad246c99 | 4792 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4793 | params->arp_interval = arp_interval; |
f5b2b966 | 4794 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4795 | params->updelay = updelay; |
4796 | params->downdelay = downdelay; | |
4797 | params->use_carrier = use_carrier; | |
4798 | params->lacp_fast = lacp_fast; | |
4799 | params->primary[0] = 0; | |
a549952a | 4800 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4801 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4802 | params->tx_queues = tx_queues; |
ebd8e497 | 4803 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4804 | params->resend_igmp = resend_igmp; |
655f8919 | 4805 | params->min_links = min_links; |
1da177e4 LT |
4806 | |
4807 | if (primary) { | |
4808 | strncpy(params->primary, primary, IFNAMSIZ); | |
4809 | params->primary[IFNAMSIZ - 1] = 0; | |
4810 | } | |
4811 | ||
4812 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4813 | ||
4814 | return 0; | |
4815 | } | |
4816 | ||
0daa2303 | 4817 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4818 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4819 | |
e8a0464c DM |
4820 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4821 | struct netdev_queue *txq, | |
4822 | void *_unused) | |
c773e847 DM |
4823 | { |
4824 | lockdep_set_class(&txq->_xmit_lock, | |
4825 | &bonding_netdev_xmit_lock_key); | |
4826 | } | |
4827 | ||
4828 | static void bond_set_lockdep_class(struct net_device *dev) | |
4829 | { | |
cf508b12 DM |
4830 | lockdep_set_class(&dev->addr_list_lock, |
4831 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4832 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4833 | } |
4834 | ||
181470fc SH |
4835 | /* |
4836 | * Called from registration process | |
4837 | */ | |
4838 | static int bond_init(struct net_device *bond_dev) | |
4839 | { | |
4840 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4841 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4842 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4843 | |
4844 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4845 | ||
9fe0617d NH |
4846 | /* |
4847 | * Initialize locks that may be required during | |
4848 | * en/deslave operations. All of the bond_open work | |
4849 | * (of which this is part) should really be moved to | |
4850 | * a phase prior to dev_open | |
4851 | */ | |
4852 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4853 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4854 | ||
181470fc SH |
4855 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4856 | if (!bond->wq) | |
4857 | return -ENOMEM; | |
4858 | ||
4859 | bond_set_lockdep_class(bond_dev); | |
4860 | ||
181470fc | 4861 | bond_create_proc_entry(bond); |
ec87fd3b | 4862 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4863 | |
6151b3d4 | 4864 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4865 | |
f073c7ca TI |
4866 | bond_debug_register(bond); |
4867 | ||
22bedad3 | 4868 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4869 | return 0; |
4870 | } | |
4871 | ||
88ead977 EB |
4872 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4873 | { | |
4874 | if (tb[IFLA_ADDRESS]) { | |
4875 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4876 | return -EINVAL; | |
4877 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4878 | return -EADDRNOTAVAIL; | |
4879 | } | |
4880 | return 0; | |
4881 | } | |
4882 | ||
4883 | static struct rtnl_link_ops bond_link_ops __read_mostly = { | |
4884 | .kind = "bond", | |
6639104b | 4885 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4886 | .setup = bond_setup, |
4887 | .validate = bond_validate, | |
4888 | }; | |
4889 | ||
dfe60397 | 4890 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4891 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4892 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4893 | * set up our sysfs entries. | |
4894 | */ | |
ec87fd3b | 4895 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4896 | { |
4897 | struct net_device *bond_dev; | |
4898 | int res; | |
4899 | ||
4900 | rtnl_lock(); | |
027ea041 | 4901 | |
1c5cae81 JP |
4902 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4903 | name ? name : "bond%d", | |
4904 | bond_setup, tx_queues); | |
dfe60397 | 4905 | if (!bond_dev) { |
a4aee5c8 | 4906 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4907 | rtnl_unlock(); |
4908 | return -ENOMEM; | |
dfe60397 MW |
4909 | } |
4910 | ||
ec87fd3b | 4911 | dev_net_set(bond_dev, net); |
88ead977 EB |
4912 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4913 | ||
dfe60397 | 4914 | res = register_netdevice(bond_dev); |
0daa2303 | 4915 | |
e826eafa PO |
4916 | netif_carrier_off(bond_dev); |
4917 | ||
7e083840 | 4918 | rtnl_unlock(); |
9e2e61fb AW |
4919 | if (res < 0) |
4920 | bond_destructor(bond_dev); | |
30c15ba9 | 4921 | return res; |
dfe60397 MW |
4922 | } |
4923 | ||
2c8c1e72 | 4924 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4925 | { |
15449745 | 4926 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4927 | |
4928 | bn->net = net; | |
4929 | INIT_LIST_HEAD(&bn->dev_list); | |
4930 | ||
ec87fd3b | 4931 | bond_create_proc_dir(bn); |
15449745 EB |
4932 | |
4933 | return 0; | |
ec87fd3b EB |
4934 | } |
4935 | ||
2c8c1e72 | 4936 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4937 | { |
15449745 | 4938 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4939 | |
4940 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
4941 | } |
4942 | ||
4943 | static struct pernet_operations bond_net_ops = { | |
4944 | .init = bond_net_init, | |
4945 | .exit = bond_net_exit, | |
15449745 EB |
4946 | .id = &bond_net_id, |
4947 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4948 | }; |
4949 | ||
1da177e4 LT |
4950 | static int __init bonding_init(void) |
4951 | { | |
1da177e4 LT |
4952 | int i; |
4953 | int res; | |
4954 | ||
bd33acc3 | 4955 | pr_info("%s", bond_version); |
1da177e4 | 4956 | |
dfe60397 | 4957 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4958 | if (res) |
dfe60397 | 4959 | goto out; |
1da177e4 | 4960 | |
15449745 | 4961 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4962 | if (res) |
4963 | goto out; | |
027ea041 | 4964 | |
88ead977 EB |
4965 | res = rtnl_link_register(&bond_link_ops); |
4966 | if (res) | |
6639104b | 4967 | goto err_link; |
88ead977 | 4968 | |
f073c7ca TI |
4969 | bond_create_debugfs(); |
4970 | ||
1da177e4 | 4971 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4972 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4973 | if (res) |
4974 | goto err; | |
1da177e4 LT |
4975 | } |
4976 | ||
b76cdba9 MW |
4977 | res = bond_create_sysfs(); |
4978 | if (res) | |
4979 | goto err; | |
4980 | ||
1da177e4 | 4981 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4982 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
dfe60397 | 4983 | out: |
1da177e4 | 4984 | return res; |
88ead977 EB |
4985 | err: |
4986 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4987 | err_link: |
15449745 | 4988 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4989 | goto out; |
dfe60397 | 4990 | |
1da177e4 LT |
4991 | } |
4992 | ||
4993 | static void __exit bonding_exit(void) | |
4994 | { | |
4995 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4996 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4997 | |
ae68c398 | 4998 | bond_destroy_sysfs(); |
f073c7ca | 4999 | bond_destroy_debugfs(); |
ae68c398 | 5000 | |
88ead977 | 5001 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 5002 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
5003 | |
5004 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
5005 | /* |
5006 | * Make sure we don't have an imbalance on our netpoll blocking | |
5007 | */ | |
5008 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 5009 | #endif |
1da177e4 LT |
5010 | } |
5011 | ||
5012 | module_init(bonding_init); | |
5013 | module_exit(bonding_exit); | |
5014 | MODULE_LICENSE("GPL"); | |
5015 | MODULE_VERSION(DRV_VERSION); | |
5016 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5017 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5018 | MODULE_ALIAS_RTNL_LINK("bond"); |