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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; |
374eeb5a NH |
398 | |
399 | skb->queue_mapping = bond_queue_mapping(skb); | |
400 | ||
080e4130 | 401 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 402 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 403 | else |
f6dc31a8 | 404 | dev_queue_xmit(skb); |
1da177e4 LT |
405 | |
406 | return 0; | |
407 | } | |
408 | ||
409 | /* | |
cc0e4070 JP |
410 | * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, |
411 | * We don't protect the slave list iteration with a lock because: | |
1da177e4 LT |
412 | * a. This operation is performed in IOCTL context, |
413 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
414 | * c. Holding a lock with BH disabled while directly calling a base driver | |
415 | * entry point is generally a BAD idea. | |
3d632c3f | 416 | * |
1da177e4 LT |
417 | * The design of synchronization/protection for this operation in the 8021q |
418 | * module is good for one or more VLAN devices over a single physical device | |
419 | * and cannot be extended for a teaming solution like bonding, so there is a | |
420 | * potential race condition here where a net device from the vlan group might | |
421 | * be referenced (either by a base driver or the 8021q code) while it is being | |
422 | * removed from the system. However, it turns out we're not making matters | |
423 | * worse, and if it works for regular VLAN usage it will work here too. | |
424 | */ | |
425 | ||
1da177e4 LT |
426 | /** |
427 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
428 | * @bond_dev: bonding net device that got called | |
429 | * @vid: vlan id being added | |
430 | */ | |
8e586137 | 431 | static int bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) |
1da177e4 | 432 | { |
454d7c9b | 433 | struct bonding *bond = netdev_priv(bond_dev); |
87002b03 | 434 | struct slave *slave, *stop_at; |
1da177e4 LT |
435 | int i, res; |
436 | ||
437 | bond_for_each_slave(bond, slave, i) { | |
87002b03 JP |
438 | res = vlan_vid_add(slave->dev, vid); |
439 | if (res) | |
440 | goto unwind; | |
1da177e4 LT |
441 | } |
442 | ||
443 | res = bond_add_vlan(bond, vid); | |
444 | if (res) { | |
a4aee5c8 | 445 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 | 446 | bond_dev->name, vid); |
8e586137 | 447 | return res; |
1da177e4 | 448 | } |
8e586137 JP |
449 | |
450 | return 0; | |
87002b03 JP |
451 | |
452 | unwind: | |
453 | /* unwind from head to the slave that failed */ | |
454 | stop_at = slave; | |
455 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) | |
456 | vlan_vid_del(slave->dev, vid); | |
457 | ||
458 | return res; | |
1da177e4 LT |
459 | } |
460 | ||
461 | /** | |
462 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
463 | * @bond_dev: bonding net device that got called | |
464 | * @vid: vlan id being removed | |
465 | */ | |
8e586137 | 466 | static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) |
1da177e4 | 467 | { |
454d7c9b | 468 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 469 | struct slave *slave; |
1da177e4 LT |
470 | int i, res; |
471 | ||
87002b03 JP |
472 | bond_for_each_slave(bond, slave, i) |
473 | vlan_vid_del(slave->dev, vid); | |
1da177e4 LT |
474 | |
475 | res = bond_del_vlan(bond, vid); | |
476 | if (res) { | |
a4aee5c8 | 477 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 | 478 | bond_dev->name, vid); |
8e586137 | 479 | return res; |
1da177e4 | 480 | } |
8e586137 JP |
481 | |
482 | return 0; | |
1da177e4 LT |
483 | } |
484 | ||
485 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
486 | { | |
487 | struct vlan_entry *vlan; | |
87002b03 | 488 | int res; |
1da177e4 | 489 | |
87002b03 JP |
490 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
491 | res = vlan_vid_add(slave_dev, vlan->vlan_id); | |
492 | if (res) | |
493 | pr_warning("%s: Failed to add vlan id %d to device %s\n", | |
494 | bond->dev->name, vlan->vlan_id, | |
495 | slave_dev->name); | |
496 | } | |
1da177e4 LT |
497 | } |
498 | ||
3d632c3f SH |
499 | static void bond_del_vlans_from_slave(struct bonding *bond, |
500 | struct net_device *slave_dev) | |
1da177e4 LT |
501 | { |
502 | struct vlan_entry *vlan; | |
1da177e4 | 503 | |
1da177e4 | 504 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
505 | if (!vlan->vlan_id) |
506 | continue; | |
87002b03 | 507 | vlan_vid_del(slave_dev, vlan->vlan_id); |
1da177e4 | 508 | } |
1da177e4 LT |
509 | } |
510 | ||
511 | /*------------------------------- Link status -------------------------------*/ | |
512 | ||
ff59c456 JV |
513 | /* |
514 | * Set the carrier state for the master according to the state of its | |
515 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
516 | * do special 802.3ad magic. | |
517 | * | |
518 | * Returns zero if carrier state does not change, nonzero if it does. | |
519 | */ | |
520 | static int bond_set_carrier(struct bonding *bond) | |
521 | { | |
522 | struct slave *slave; | |
523 | int i; | |
524 | ||
525 | if (bond->slave_cnt == 0) | |
526 | goto down; | |
527 | ||
528 | if (bond->params.mode == BOND_MODE_8023AD) | |
529 | return bond_3ad_set_carrier(bond); | |
530 | ||
531 | bond_for_each_slave(bond, slave, i) { | |
532 | if (slave->link == BOND_LINK_UP) { | |
533 | if (!netif_carrier_ok(bond->dev)) { | |
534 | netif_carrier_on(bond->dev); | |
535 | return 1; | |
536 | } | |
537 | return 0; | |
538 | } | |
539 | } | |
540 | ||
541 | down: | |
542 | if (netif_carrier_ok(bond->dev)) { | |
543 | netif_carrier_off(bond->dev); | |
544 | return 1; | |
545 | } | |
546 | return 0; | |
547 | } | |
548 | ||
1da177e4 LT |
549 | /* |
550 | * Get link speed and duplex from the slave's base driver | |
551 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 552 | * values are invalid, set speed and duplex to -1, |
1da177e4 LT |
553 | * and return error. |
554 | */ | |
555 | static int bond_update_speed_duplex(struct slave *slave) | |
556 | { | |
557 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 558 | struct ethtool_cmd ecmd; |
5d30530e | 559 | u32 slave_speed; |
61a44b9c | 560 | int res; |
1da177e4 | 561 | |
589665f5 DC |
562 | slave->speed = SPEED_UNKNOWN; |
563 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 564 | |
4bc71cb9 | 565 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 566 | if (res < 0) |
1da177e4 | 567 | return -1; |
1da177e4 | 568 | |
4bc71cb9 | 569 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 570 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
1da177e4 | 571 | return -1; |
1da177e4 | 572 | |
4bc71cb9 | 573 | switch (ecmd.duplex) { |
1da177e4 LT |
574 | case DUPLEX_FULL: |
575 | case DUPLEX_HALF: | |
576 | break; | |
577 | default: | |
578 | return -1; | |
579 | } | |
580 | ||
5d30530e | 581 | slave->speed = slave_speed; |
4bc71cb9 | 582 | slave->duplex = ecmd.duplex; |
1da177e4 LT |
583 | |
584 | return 0; | |
585 | } | |
586 | ||
587 | /* | |
588 | * if <dev> supports MII link status reporting, check its link status. | |
589 | * | |
590 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 591 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
592 | * |
593 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
594 | * can't tell and just pretend it is), or 0, meaning that the link is | |
595 | * down. | |
596 | * | |
597 | * If reporting is non-zero, instead of faking link up, return -1 if | |
598 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
599 | * support them). If use_carrier is set, return whatever it says. | |
600 | * It'd be nice if there was a good way to tell if a driver supports | |
601 | * netif_carrier, but there really isn't. | |
602 | */ | |
3d632c3f SH |
603 | static int bond_check_dev_link(struct bonding *bond, |
604 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 605 | { |
eb7cc59a | 606 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 607 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
608 | struct ifreq ifr; |
609 | struct mii_ioctl_data *mii; | |
1da177e4 | 610 | |
6c988853 PG |
611 | if (!reporting && !netif_running(slave_dev)) |
612 | return 0; | |
613 | ||
eb7cc59a | 614 | if (bond->params.use_carrier) |
1da177e4 | 615 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 616 | |
29112f4e JP |
617 | /* Try to get link status using Ethtool first. */ |
618 | if (slave_dev->ethtool_ops) { | |
619 | if (slave_dev->ethtool_ops->get_link) { | |
620 | u32 link; | |
621 | ||
622 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
623 | ||
624 | return link ? BMSR_LSTATUS : 0; | |
625 | } | |
626 | } | |
627 | ||
3d632c3f | 628 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 629 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
630 | if (ioctl) { |
631 | /* TODO: set pointer to correct ioctl on a per team member */ | |
632 | /* bases to make this more efficient. that is, once */ | |
633 | /* we determine the correct ioctl, we will always */ | |
634 | /* call it and not the others for that team */ | |
635 | /* member. */ | |
636 | ||
637 | /* | |
638 | * We cannot assume that SIOCGMIIPHY will also read a | |
639 | * register; not all network drivers (e.g., e100) | |
640 | * support that. | |
641 | */ | |
642 | ||
643 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
644 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
645 | mii = if_mii(&ifr); | |
646 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
647 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
648 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
649 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
650 | } |
651 | } | |
652 | ||
1da177e4 LT |
653 | /* |
654 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 655 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
656 | * cannot report link status). If not reporting, pretend |
657 | * we're ok. | |
658 | */ | |
3d632c3f | 659 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
660 | } |
661 | ||
662 | /*----------------------------- Multicast list ------------------------------*/ | |
663 | ||
1da177e4 LT |
664 | /* |
665 | * Push the promiscuity flag down to appropriate slaves | |
666 | */ | |
7e1a1ac1 | 667 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 668 | { |
7e1a1ac1 | 669 | int err = 0; |
1da177e4 LT |
670 | if (USES_PRIMARY(bond->params.mode)) { |
671 | /* write lock already acquired */ | |
672 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
673 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
674 | inc); | |
1da177e4 LT |
675 | } |
676 | } else { | |
677 | struct slave *slave; | |
678 | int i; | |
679 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
680 | err = dev_set_promiscuity(slave->dev, inc); |
681 | if (err) | |
682 | return err; | |
1da177e4 LT |
683 | } |
684 | } | |
7e1a1ac1 | 685 | return err; |
1da177e4 LT |
686 | } |
687 | ||
688 | /* | |
689 | * Push the allmulti flag down to all slaves | |
690 | */ | |
7e1a1ac1 | 691 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 692 | { |
7e1a1ac1 | 693 | int err = 0; |
1da177e4 LT |
694 | if (USES_PRIMARY(bond->params.mode)) { |
695 | /* write lock already acquired */ | |
696 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
697 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
698 | inc); | |
1da177e4 LT |
699 | } |
700 | } else { | |
701 | struct slave *slave; | |
702 | int i; | |
703 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
704 | err = dev_set_allmulti(slave->dev, inc); |
705 | if (err) | |
706 | return err; | |
1da177e4 LT |
707 | } |
708 | } | |
7e1a1ac1 | 709 | return err; |
1da177e4 LT |
710 | } |
711 | ||
712 | /* | |
713 | * Add a Multicast address to slaves | |
714 | * according to mode | |
715 | */ | |
22bedad3 | 716 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
717 | { |
718 | if (USES_PRIMARY(bond->params.mode)) { | |
719 | /* write lock already acquired */ | |
3d632c3f | 720 | if (bond->curr_active_slave) |
22bedad3 | 721 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
722 | } else { |
723 | struct slave *slave; | |
724 | int i; | |
3d632c3f SH |
725 | |
726 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 727 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
728 | } |
729 | } | |
730 | ||
731 | /* | |
732 | * Remove a multicast address from slave | |
733 | * according to mode | |
734 | */ | |
22bedad3 | 735 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
736 | { |
737 | if (USES_PRIMARY(bond->params.mode)) { | |
738 | /* write lock already acquired */ | |
3d632c3f | 739 | if (bond->curr_active_slave) |
22bedad3 | 740 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
741 | } else { |
742 | struct slave *slave; | |
743 | int i; | |
744 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 745 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
746 | } |
747 | } | |
748 | } | |
749 | ||
a816c7c7 | 750 | |
5a37e8ca | 751 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
752 | { |
753 | struct in_device *in_dev; | |
a816c7c7 JV |
754 | |
755 | rcu_read_lock(); | |
5a37e8ca | 756 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 757 | if (in_dev) |
24912420 | 758 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
759 | rcu_read_unlock(); |
760 | } | |
761 | ||
5a37e8ca FL |
762 | /* |
763 | * Retrieve the list of registered multicast addresses for the bonding | |
764 | * device and retransmit an IGMP JOIN request to the current active | |
765 | * slave. | |
766 | */ | |
767 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
768 | { | |
1c3ac428 | 769 | struct net_device *bond_dev, *vlan_dev, *master_dev; |
5a37e8ca FL |
770 | struct vlan_entry *vlan; |
771 | ||
772 | read_lock(&bond->lock); | |
773 | ||
1c3ac428 PP |
774 | bond_dev = bond->dev; |
775 | ||
5a37e8ca | 776 | /* rejoin all groups on bond device */ |
1c3ac428 PP |
777 | __bond_resend_igmp_join_requests(bond_dev); |
778 | ||
779 | /* | |
780 | * if bond is enslaved to a bridge, | |
781 | * then rejoin all groups on its master | |
782 | */ | |
783 | master_dev = bond_dev->master; | |
784 | if (master_dev) | |
785 | if ((master_dev->priv_flags & IFF_EBRIDGE) | |
786 | && (bond_dev->priv_flags & IFF_BRIDGE_PORT)) | |
787 | __bond_resend_igmp_join_requests(master_dev); | |
5a37e8ca FL |
788 | |
789 | /* rejoin all groups on vlan devices */ | |
cc0e4070 JP |
790 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
791 | rcu_read_lock(); | |
1c3ac428 | 792 | vlan_dev = __vlan_find_dev_deep(bond_dev, |
cc0e4070 JP |
793 | vlan->vlan_id); |
794 | rcu_read_unlock(); | |
795 | if (vlan_dev) | |
796 | __bond_resend_igmp_join_requests(vlan_dev); | |
5a37e8ca FL |
797 | } |
798 | ||
e6d265e8 | 799 | if (--bond->igmp_retrans > 0) |
c2952c31 | 800 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
e6d265e8 | 801 | |
5a37e8ca FL |
802 | read_unlock(&bond->lock); |
803 | } | |
804 | ||
379b7383 | 805 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
806 | { |
807 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 808 | mcast_work.work); |
5a37e8ca FL |
809 | bond_resend_igmp_join_requests(bond); |
810 | } | |
811 | ||
1da177e4 LT |
812 | /* |
813 | * flush all members of flush->mc_list from device dev->mc_list | |
814 | */ | |
3d632c3f SH |
815 | static void bond_mc_list_flush(struct net_device *bond_dev, |
816 | struct net_device *slave_dev) | |
1da177e4 | 817 | { |
454d7c9b | 818 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 819 | struct netdev_hw_addr *ha; |
1da177e4 | 820 | |
22bedad3 JP |
821 | netdev_for_each_mc_addr(ha, bond_dev) |
822 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
823 | |
824 | if (bond->params.mode == BOND_MODE_8023AD) { | |
825 | /* del lacpdu mc addr from mc list */ | |
826 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
827 | ||
22bedad3 | 828 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
829 | } |
830 | } | |
831 | ||
832 | /*--------------------------- Active slave change ---------------------------*/ | |
833 | ||
834 | /* | |
835 | * Update the mc list and multicast-related flags for the new and | |
836 | * old active slaves (if any) according to the multicast mode, and | |
837 | * promiscuous flags unconditionally. | |
838 | */ | |
3d632c3f SH |
839 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
840 | struct slave *old_active) | |
1da177e4 | 841 | { |
22bedad3 | 842 | struct netdev_hw_addr *ha; |
1da177e4 | 843 | |
3d632c3f | 844 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
845 | /* nothing to do - mc list is already up-to-date on |
846 | * all slaves | |
847 | */ | |
848 | return; | |
1da177e4 LT |
849 | |
850 | if (old_active) { | |
3d632c3f | 851 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 852 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 853 | |
3d632c3f | 854 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 855 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 856 | |
22bedad3 JP |
857 | netdev_for_each_mc_addr(ha, bond->dev) |
858 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
859 | } |
860 | ||
861 | if (new_active) { | |
7e1a1ac1 | 862 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 863 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 864 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 865 | |
3d632c3f | 866 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 867 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 868 | |
22bedad3 JP |
869 | netdev_for_each_mc_addr(ha, bond->dev) |
870 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
871 | } |
872 | } | |
873 | ||
3915c1e8 JV |
874 | /* |
875 | * bond_do_fail_over_mac | |
876 | * | |
877 | * Perform special MAC address swapping for fail_over_mac settings | |
878 | * | |
879 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
880 | */ | |
881 | static void bond_do_fail_over_mac(struct bonding *bond, | |
882 | struct slave *new_active, | |
883 | struct slave *old_active) | |
1f78d9f9 HE |
884 | __releases(&bond->curr_slave_lock) |
885 | __releases(&bond->lock) | |
886 | __acquires(&bond->lock) | |
887 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
888 | { |
889 | u8 tmp_mac[ETH_ALEN]; | |
890 | struct sockaddr saddr; | |
891 | int rv; | |
892 | ||
893 | switch (bond->params.fail_over_mac) { | |
894 | case BOND_FOM_ACTIVE: | |
895 | if (new_active) | |
896 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
897 | new_active->dev->addr_len); | |
898 | break; | |
899 | case BOND_FOM_FOLLOW: | |
900 | /* | |
901 | * if new_active && old_active, swap them | |
902 | * if just old_active, do nothing (going to no active slave) | |
903 | * if just new_active, set new_active to bond's MAC | |
904 | */ | |
905 | if (!new_active) | |
906 | return; | |
907 | ||
908 | write_unlock_bh(&bond->curr_slave_lock); | |
909 | read_unlock(&bond->lock); | |
910 | ||
911 | if (old_active) { | |
912 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
913 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
914 | ETH_ALEN); | |
915 | saddr.sa_family = new_active->dev->type; | |
916 | } else { | |
917 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
918 | saddr.sa_family = bond->dev->type; | |
919 | } | |
920 | ||
921 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
922 | if (rv) { | |
a4aee5c8 | 923 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
924 | bond->dev->name, -rv, new_active->dev->name); |
925 | goto out; | |
926 | } | |
927 | ||
928 | if (!old_active) | |
929 | goto out; | |
930 | ||
931 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
932 | saddr.sa_family = old_active->dev->type; | |
933 | ||
934 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
935 | if (rv) | |
a4aee5c8 | 936 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
937 | bond->dev->name, -rv, new_active->dev->name); |
938 | out: | |
939 | read_lock(&bond->lock); | |
940 | write_lock_bh(&bond->curr_slave_lock); | |
941 | break; | |
942 | default: | |
a4aee5c8 | 943 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
944 | bond->dev->name, bond->params.fail_over_mac); |
945 | break; | |
946 | } | |
947 | ||
948 | } | |
949 | ||
a549952a JP |
950 | static bool bond_should_change_active(struct bonding *bond) |
951 | { | |
952 | struct slave *prim = bond->primary_slave; | |
953 | struct slave *curr = bond->curr_active_slave; | |
954 | ||
955 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
956 | return true; | |
957 | if (bond->force_primary) { | |
958 | bond->force_primary = false; | |
959 | return true; | |
960 | } | |
961 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
962 | (prim->speed < curr->speed || | |
963 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
964 | return false; | |
965 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
966 | return false; | |
967 | return true; | |
968 | } | |
3915c1e8 | 969 | |
1da177e4 LT |
970 | /** |
971 | * find_best_interface - select the best available slave to be the active one | |
972 | * @bond: our bonding struct | |
973 | * | |
974 | * Warning: Caller must hold curr_slave_lock for writing. | |
975 | */ | |
976 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
977 | { | |
978 | struct slave *new_active, *old_active; | |
979 | struct slave *bestslave = NULL; | |
980 | int mintime = bond->params.updelay; | |
981 | int i; | |
982 | ||
49b4ad92 | 983 | new_active = bond->curr_active_slave; |
1da177e4 LT |
984 | |
985 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 986 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 987 | new_active = bond->first_slave; |
3d632c3f | 988 | else |
1da177e4 | 989 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
990 | } |
991 | ||
1da177e4 | 992 | if ((bond->primary_slave) && |
a549952a JP |
993 | bond->primary_slave->link == BOND_LINK_UP && |
994 | bond_should_change_active(bond)) { | |
1da177e4 LT |
995 | new_active = bond->primary_slave; |
996 | } | |
997 | ||
998 | /* remember where to stop iterating over the slaves */ | |
999 | old_active = new_active; | |
1000 | ||
1001 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1002 | if (new_active->link == BOND_LINK_UP) { |
1003 | return new_active; | |
1004 | } else if (new_active->link == BOND_LINK_BACK && | |
1005 | IS_UP(new_active->dev)) { | |
1006 | /* link up, but waiting for stabilization */ | |
1007 | if (new_active->delay < mintime) { | |
1008 | mintime = new_active->delay; | |
1009 | bestslave = new_active; | |
1da177e4 LT |
1010 | } |
1011 | } | |
1012 | } | |
1013 | ||
1014 | return bestslave; | |
1015 | } | |
1016 | ||
ad246c99 BH |
1017 | static bool bond_should_notify_peers(struct bonding *bond) |
1018 | { | |
1019 | struct slave *slave = bond->curr_active_slave; | |
1020 | ||
1021 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1022 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1023 | ||
1024 | if (!slave || !bond->send_peer_notif || | |
1025 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1026 | return false; | |
1027 | ||
1028 | bond->send_peer_notif--; | |
1029 | return true; | |
1030 | } | |
1031 | ||
1da177e4 LT |
1032 | /** |
1033 | * change_active_interface - change the active slave into the specified one | |
1034 | * @bond: our bonding struct | |
1035 | * @new: the new slave to make the active one | |
1036 | * | |
1037 | * Set the new slave to the bond's settings and unset them on the old | |
1038 | * curr_active_slave. | |
1039 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1040 | * | |
1041 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1042 | * because it is apparently the best available slave we have, even though its | |
1043 | * updelay hasn't timed out yet. | |
1044 | * | |
3915c1e8 JV |
1045 | * If new_active is not NULL, caller must hold bond->lock for read and |
1046 | * curr_slave_lock for write_bh. | |
1da177e4 | 1047 | */ |
a77b5325 | 1048 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1049 | { |
1050 | struct slave *old_active = bond->curr_active_slave; | |
1051 | ||
3d632c3f | 1052 | if (old_active == new_active) |
1da177e4 | 1053 | return; |
1da177e4 LT |
1054 | |
1055 | if (new_active) { | |
b2220cad JV |
1056 | new_active->jiffies = jiffies; |
1057 | ||
1da177e4 LT |
1058 | if (new_active->link == BOND_LINK_BACK) { |
1059 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1060 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1061 | bond->dev->name, new_active->dev->name, | |
1062 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1063 | } |
1064 | ||
1065 | new_active->delay = 0; | |
1066 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1067 | |
3d632c3f | 1068 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1069 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1070 | |
58402054 | 1071 | if (bond_is_lb(bond)) |
1da177e4 | 1072 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1073 | } else { |
1074 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1075 | pr_info("%s: making interface %s the new active one.\n", |
1076 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1077 | } |
1078 | } | |
1079 | } | |
1080 | ||
3d632c3f | 1081 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1082 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1083 | |
58402054 | 1084 | if (bond_is_lb(bond)) { |
1da177e4 | 1085 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1086 | if (old_active) |
1087 | bond_set_slave_inactive_flags(old_active); | |
1088 | if (new_active) | |
1089 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1090 | } else { |
1091 | bond->curr_active_slave = new_active; | |
1092 | } | |
c3ade5ca JV |
1093 | |
1094 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1095 | if (old_active) |
c3ade5ca | 1096 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1097 | |
1098 | if (new_active) { | |
ad246c99 BH |
1099 | bool should_notify_peers = false; |
1100 | ||
c3ade5ca | 1101 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1102 | |
709f8a45 OG |
1103 | if (bond->params.fail_over_mac) |
1104 | bond_do_fail_over_mac(bond, new_active, | |
1105 | old_active); | |
3915c1e8 | 1106 | |
ad246c99 BH |
1107 | if (netif_running(bond->dev)) { |
1108 | bond->send_peer_notif = | |
1109 | bond->params.num_peer_notif; | |
1110 | should_notify_peers = | |
1111 | bond_should_notify_peers(bond); | |
1112 | } | |
1113 | ||
01f3109d OG |
1114 | write_unlock_bh(&bond->curr_slave_lock); |
1115 | read_unlock(&bond->lock); | |
1116 | ||
75c78500 | 1117 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1118 | if (should_notify_peers) |
1119 | netdev_bonding_change(bond->dev, | |
1120 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1121 | |
1122 | read_lock(&bond->lock); | |
1123 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1124 | } |
c3ade5ca | 1125 | } |
a2fd940f | 1126 | |
5a37e8ca | 1127 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1128 | * all were sent on curr_active_slave. |
1129 | * resend only if bond is brought up with the affected | |
1130 | * bonding modes and the retransmission is enabled */ | |
1131 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1132 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1133 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1134 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1135 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1136 | } |
1da177e4 LT |
1137 | } |
1138 | ||
1139 | /** | |
1140 | * bond_select_active_slave - select a new active slave, if needed | |
1141 | * @bond: our bonding struct | |
1142 | * | |
3d632c3f | 1143 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1144 | * - The old curr_active_slave has been released or lost its link. |
1145 | * - The primary_slave has got its link back. | |
1146 | * - A slave has got its link back and there's no old curr_active_slave. | |
1147 | * | |
3915c1e8 | 1148 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1149 | */ |
a77b5325 | 1150 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1151 | { |
1152 | struct slave *best_slave; | |
ff59c456 | 1153 | int rv; |
1da177e4 LT |
1154 | |
1155 | best_slave = bond_find_best_slave(bond); | |
1156 | if (best_slave != bond->curr_active_slave) { | |
1157 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1158 | rv = bond_set_carrier(bond); |
1159 | if (!rv) | |
1160 | return; | |
1161 | ||
1162 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1163 | pr_info("%s: first active interface up!\n", |
1164 | bond->dev->name); | |
ff59c456 | 1165 | } else { |
a4aee5c8 JP |
1166 | pr_info("%s: now running without any active interface !\n", |
1167 | bond->dev->name); | |
ff59c456 | 1168 | } |
1da177e4 LT |
1169 | } |
1170 | } | |
1171 | ||
1172 | /*--------------------------- slave list handling ---------------------------*/ | |
1173 | ||
1174 | /* | |
1175 | * This function attaches the slave to the end of list. | |
1176 | * | |
1177 | * bond->lock held for writing by caller. | |
1178 | */ | |
1179 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1180 | { | |
1181 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1182 | new_slave->next = new_slave; | |
1183 | new_slave->prev = new_slave; | |
1184 | bond->first_slave = new_slave; | |
1185 | } else { | |
1186 | new_slave->next = bond->first_slave; | |
1187 | new_slave->prev = bond->first_slave->prev; | |
1188 | new_slave->next->prev = new_slave; | |
1189 | new_slave->prev->next = new_slave; | |
1190 | } | |
1191 | ||
1192 | bond->slave_cnt++; | |
1193 | } | |
1194 | ||
1195 | /* | |
1196 | * This function detaches the slave from the list. | |
1197 | * WARNING: no check is made to verify if the slave effectively | |
1198 | * belongs to <bond>. | |
1199 | * Nothing is freed on return, structures are just unchained. | |
1200 | * If any slave pointer in bond was pointing to <slave>, | |
1201 | * it should be changed by the calling function. | |
1202 | * | |
1203 | * bond->lock held for writing by caller. | |
1204 | */ | |
1205 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1206 | { | |
3d632c3f | 1207 | if (slave->next) |
1da177e4 | 1208 | slave->next->prev = slave->prev; |
1da177e4 | 1209 | |
3d632c3f | 1210 | if (slave->prev) |
1da177e4 | 1211 | slave->prev->next = slave->next; |
1da177e4 LT |
1212 | |
1213 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1214 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1215 | bond->first_slave = slave->next; | |
1216 | } else { | |
1217 | bond->first_slave = NULL; /* slave was the last one */ | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | slave->next = NULL; | |
1222 | slave->prev = NULL; | |
1223 | bond->slave_cnt--; | |
1224 | } | |
1225 | ||
f6dc31a8 | 1226 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1227 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1228 | { |
8a8efa22 AW |
1229 | struct netpoll *np; |
1230 | int err = 0; | |
f6dc31a8 | 1231 | |
8a8efa22 AW |
1232 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1233 | err = -ENOMEM; | |
1234 | if (!np) | |
1235 | goto out; | |
1236 | ||
1237 | np->dev = slave->dev; | |
cefa9993 | 1238 | strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ); |
8a8efa22 AW |
1239 | err = __netpoll_setup(np); |
1240 | if (err) { | |
1241 | kfree(np); | |
1242 | goto out; | |
f6dc31a8 | 1243 | } |
8a8efa22 AW |
1244 | slave->np = np; |
1245 | out: | |
1246 | return err; | |
1247 | } | |
1248 | static inline void slave_disable_netpoll(struct slave *slave) | |
1249 | { | |
1250 | struct netpoll *np = slave->np; | |
1251 | ||
1252 | if (!np) | |
1253 | return; | |
1254 | ||
1255 | slave->np = NULL; | |
1256 | synchronize_rcu_bh(); | |
1257 | __netpoll_cleanup(np); | |
1258 | kfree(np); | |
1259 | } | |
1260 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1261 | { | |
1262 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1263 | return false; | |
1264 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1265 | return false; | |
1266 | return true; | |
f6dc31a8 WC |
1267 | } |
1268 | ||
1269 | static void bond_poll_controller(struct net_device *bond_dev) | |
1270 | { | |
8a8efa22 AW |
1271 | } |
1272 | ||
1273 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1274 | { | |
c2355e1a NH |
1275 | struct slave *slave; |
1276 | int i; | |
1277 | ||
8a8efa22 AW |
1278 | bond_for_each_slave(bond, slave, i) |
1279 | if (IS_UP(slave->dev)) | |
1280 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1281 | } |
f6dc31a8 WC |
1282 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1283 | { | |
1284 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1285 | |
1286 | read_lock(&bond->lock); | |
1287 | __bond_netpoll_cleanup(bond); | |
1288 | read_unlock(&bond->lock); | |
1289 | } | |
1290 | ||
1291 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1292 | { | |
1293 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1294 | struct slave *slave; |
8a8efa22 | 1295 | int i, err = 0; |
f6dc31a8 WC |
1296 | |
1297 | read_lock(&bond->lock); | |
f6dc31a8 | 1298 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1299 | err = slave_enable_netpoll(slave); |
1300 | if (err) { | |
1301 | __bond_netpoll_cleanup(bond); | |
1302 | break; | |
f6dc31a8 WC |
1303 | } |
1304 | } | |
1305 | read_unlock(&bond->lock); | |
8a8efa22 | 1306 | return err; |
f6dc31a8 WC |
1307 | } |
1308 | ||
8a8efa22 AW |
1309 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1310 | { | |
1311 | return bond->dev->npinfo; | |
1312 | } | |
f6dc31a8 | 1313 | |
8a8efa22 AW |
1314 | #else |
1315 | static inline int slave_enable_netpoll(struct slave *slave) | |
1316 | { | |
1317 | return 0; | |
1318 | } | |
1319 | static inline void slave_disable_netpoll(struct slave *slave) | |
1320 | { | |
1321 | } | |
f6dc31a8 WC |
1322 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1323 | { | |
1324 | } | |
f6dc31a8 WC |
1325 | #endif |
1326 | ||
1da177e4 LT |
1327 | /*---------------------------------- IOCTL ----------------------------------*/ |
1328 | ||
4ad072c9 AB |
1329 | static int bond_sethwaddr(struct net_device *bond_dev, |
1330 | struct net_device *slave_dev) | |
1da177e4 | 1331 | { |
5a03cdb7 HE |
1332 | pr_debug("bond_dev=%p\n", bond_dev); |
1333 | pr_debug("slave_dev=%p\n", slave_dev); | |
1334 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1335 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1336 | return 0; | |
1337 | } | |
1338 | ||
c8f44aff MM |
1339 | static netdev_features_t bond_fix_features(struct net_device *dev, |
1340 | netdev_features_t features) | |
8531c5ff | 1341 | { |
8531c5ff | 1342 | struct slave *slave; |
b2a103e6 | 1343 | struct bonding *bond = netdev_priv(dev); |
c8f44aff | 1344 | netdev_features_t mask; |
8e3babcd | 1345 | int i; |
8531c5ff | 1346 | |
b2a103e6 | 1347 | read_lock(&bond->lock); |
b63365a2 | 1348 | |
b2a103e6 MM |
1349 | if (!bond->first_slave) { |
1350 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1351 | features |= NETIF_F_VLAN_CHALLENGED; | |
1352 | goto out; | |
1353 | } | |
b63365a2 | 1354 | |
b2a103e6 | 1355 | mask = features; |
b63365a2 | 1356 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1357 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1358 | |
54ef3137 | 1359 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1360 | features = netdev_increment_features(features, |
1361 | slave->dev->features, | |
b2a103e6 MM |
1362 | mask); |
1363 | } | |
1364 | ||
1365 | out: | |
1366 | read_unlock(&bond->lock); | |
1367 | return features; | |
1368 | } | |
1369 | ||
62f2a3a4 MM |
1370 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1371 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1372 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1373 | |
1374 | static void bond_compute_features(struct bonding *bond) | |
1375 | { | |
1376 | struct slave *slave; | |
1377 | struct net_device *bond_dev = bond->dev; | |
c8f44aff | 1378 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
b2a103e6 MM |
1379 | unsigned short max_hard_header_len = ETH_HLEN; |
1380 | int i; | |
1381 | ||
1382 | read_lock(&bond->lock); | |
1383 | ||
1384 | if (!bond->first_slave) | |
1385 | goto done; | |
1386 | ||
1387 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1388 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1389 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1390 | ||
54ef3137 JV |
1391 | if (slave->dev->hard_header_len > max_hard_header_len) |
1392 | max_hard_header_len = slave->dev->hard_header_len; | |
1393 | } | |
8531c5ff | 1394 | |
b63365a2 | 1395 | done: |
b2a103e6 | 1396 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1397 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff | 1398 | |
b2a103e6 MM |
1399 | read_unlock(&bond->lock); |
1400 | ||
1401 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1402 | } |
1403 | ||
872254dd MS |
1404 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1405 | struct net_device *slave_dev) | |
1406 | { | |
454d7c9b | 1407 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1408 | |
00829823 | 1409 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1410 | |
1411 | bond_dev->type = slave_dev->type; | |
1412 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1413 | bond_dev->addr_len = slave_dev->addr_len; | |
1414 | ||
1415 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1416 | slave_dev->addr_len); | |
d90a162a | 1417 | bond->setup_by_slave = 1; |
872254dd MS |
1418 | } |
1419 | ||
5b2c4dd2 | 1420 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1421 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1422 | */ |
1423 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1424 | struct slave *slave, |
1425 | struct bonding *bond) | |
5b2c4dd2 | 1426 | { |
2d7011ca | 1427 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1428 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1429 | skb->pkt_type != PACKET_BROADCAST && |
1430 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1431 | return false; |
5b2c4dd2 JP |
1432 | return true; |
1433 | } | |
1434 | return false; | |
1435 | } | |
1436 | ||
8a4eb573 | 1437 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1438 | { |
8a4eb573 | 1439 | struct sk_buff *skb = *pskb; |
f1c1775a | 1440 | struct slave *slave; |
0bd80dad | 1441 | struct bonding *bond; |
4d97480b MH |
1442 | void (*recv_probe)(struct sk_buff *, struct bonding *, |
1443 | struct slave *); | |
5b2c4dd2 | 1444 | |
8a4eb573 JP |
1445 | skb = skb_share_check(skb, GFP_ATOMIC); |
1446 | if (unlikely(!skb)) | |
1447 | return RX_HANDLER_CONSUMED; | |
1448 | ||
1449 | *pskb = skb; | |
5b2c4dd2 | 1450 | |
35d48903 JP |
1451 | slave = bond_slave_get_rcu(skb->dev); |
1452 | bond = slave->bond; | |
0bd80dad JP |
1453 | |
1454 | if (bond->params.arp_interval) | |
f1c1775a | 1455 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1456 | |
4d97480b MH |
1457 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1458 | if (recv_probe) { | |
3aba891d JP |
1459 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); |
1460 | ||
1461 | if (likely(nskb)) { | |
4d97480b | 1462 | recv_probe(nskb, bond, slave); |
3aba891d JP |
1463 | dev_kfree_skb(nskb); |
1464 | } | |
1465 | } | |
1466 | ||
0bd80dad | 1467 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1468 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1469 | } |
1470 | ||
35d48903 | 1471 | skb->dev = bond->dev; |
5b2c4dd2 | 1472 | |
0bd80dad | 1473 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1474 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1475 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1476 | |
541ac7c9 CG |
1477 | if (unlikely(skb_cow_head(skb, |
1478 | skb->data - skb_mac_header(skb)))) { | |
1479 | kfree_skb(skb); | |
8a4eb573 | 1480 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1481 | } |
35d48903 | 1482 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1483 | } |
1484 | ||
8a4eb573 | 1485 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1486 | } |
1487 | ||
1da177e4 | 1488 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1489 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1490 | { |
454d7c9b | 1491 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1492 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1493 | struct slave *new_slave = NULL; |
22bedad3 | 1494 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1495 | struct sockaddr addr; |
1496 | int link_reporting; | |
1da177e4 LT |
1497 | int res = 0; |
1498 | ||
552709d5 | 1499 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1500 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1501 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1502 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1503 | } |
1504 | ||
1da177e4 LT |
1505 | /* already enslaved */ |
1506 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1507 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1508 | return -EBUSY; |
1509 | } | |
1510 | ||
1511 | /* vlan challenged mutual exclusion */ | |
1512 | /* no need to lock since we're protected by rtnl_lock */ | |
1513 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1514 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
cc0e4070 | 1515 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
1516 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1517 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1518 | return -EPERM; |
1519 | } else { | |
a4aee5c8 JP |
1520 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1521 | bond_dev->name, slave_dev->name, | |
1522 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1523 | } |
1524 | } else { | |
5a03cdb7 | 1525 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1526 | } |
1527 | ||
217df670 JV |
1528 | /* |
1529 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1530 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1531 | * the current ifenslave will set the interface down prior to |
1532 | * enslaving it; the old ifenslave will not. | |
1533 | */ | |
1534 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1535 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1536 | slave_dev->name); |
1537 | res = -EPERM; | |
1538 | goto err_undo_flags; | |
1539 | } | |
1da177e4 | 1540 | |
872254dd MS |
1541 | /* set bonding device ether type by slave - bonding netdevices are |
1542 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1543 | * there is a need to override some of the type dependent attribs/funcs. | |
1544 | * | |
1545 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1546 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1547 | */ | |
1548 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1549 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1550 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1551 | bond_dev->name, |
1552 | bond_dev->type, slave_dev->type); | |
75c78500 | 1553 | |
3ca5b404 JP |
1554 | res = netdev_bonding_change(bond_dev, |
1555 | NETDEV_PRE_TYPE_CHANGE); | |
1556 | res = notifier_to_errno(res); | |
1557 | if (res) { | |
1558 | pr_err("%s: refused to change device type\n", | |
1559 | bond_dev->name); | |
1560 | res = -EBUSY; | |
1561 | goto err_undo_flags; | |
1562 | } | |
75c78500 | 1563 | |
32a806c1 | 1564 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1565 | dev_uc_flush(bond_dev); |
22bedad3 | 1566 | dev_mc_flush(bond_dev); |
32a806c1 | 1567 | |
e36b9d16 MS |
1568 | if (slave_dev->type != ARPHRD_ETHER) |
1569 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1570 | else { |
e36b9d16 | 1571 | ether_setup(bond_dev); |
550fd08c NH |
1572 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1573 | } | |
75c78500 | 1574 | |
93d9b7d7 JP |
1575 | netdev_bonding_change(bond_dev, |
1576 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1577 | } |
872254dd | 1578 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1579 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1580 | slave_dev->name, | |
1581 | slave_dev->type, bond_dev->type); | |
1582 | res = -EINVAL; | |
1583 | goto err_undo_flags; | |
872254dd MS |
1584 | } |
1585 | ||
eb7cc59a | 1586 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1587 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1588 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1589 | bond_dev->name); | |
3915c1e8 JV |
1590 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1591 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1592 | 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", |
1593 | bond_dev->name); | |
2ab82852 MS |
1594 | res = -EOPNOTSUPP; |
1595 | goto err_undo_flags; | |
1596 | } | |
1da177e4 LT |
1597 | } |
1598 | ||
8d8fc29d AW |
1599 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1600 | ||
c20811a7 JP |
1601 | /* If this is the first slave, then we need to set the master's hardware |
1602 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1603 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1604 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1605 | slave_dev->addr_len); | |
1606 | ||
1607 | ||
243cb4e5 | 1608 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1609 | if (!new_slave) { |
1610 | res = -ENOMEM; | |
1611 | goto err_undo_flags; | |
1612 | } | |
1613 | ||
bb1d9123 AG |
1614 | /* |
1615 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1616 | * is set via sysfs or module option if desired. | |
1617 | */ | |
1618 | new_slave->queue_id = 0; | |
1619 | ||
b15ba0fb JP |
1620 | /* Save slave's original mtu and then set it to match the bond */ |
1621 | new_slave->original_mtu = slave_dev->mtu; | |
1622 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1623 | if (res) { | |
1624 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1625 | goto err_free; | |
1626 | } | |
1627 | ||
217df670 JV |
1628 | /* |
1629 | * Save slave's original ("permanent") mac address for modes | |
1630 | * that need it, and for restoring it upon release, and then | |
1631 | * set it to the master's address | |
1632 | */ | |
1633 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1634 | |
dd957c57 | 1635 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1636 | /* |
1637 | * Set slave to master's mac address. The application already | |
1638 | * set the master's mac address to that of the first slave | |
1639 | */ | |
1640 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1641 | addr.sa_family = slave_dev->type; | |
1642 | res = dev_set_mac_address(slave_dev, &addr); | |
1643 | if (res) { | |
5a03cdb7 | 1644 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1645 | goto err_restore_mtu; |
2ab82852 | 1646 | } |
217df670 | 1647 | } |
1da177e4 | 1648 | |
1765a575 | 1649 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1650 | if (res) { |
1765a575 | 1651 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1652 | goto err_restore_mac; |
c2edacf8 | 1653 | } |
5b2c4dd2 | 1654 | |
217df670 JV |
1655 | /* open the slave since the application closed it */ |
1656 | res = dev_open(slave_dev); | |
1657 | if (res) { | |
3d632c3f | 1658 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1659 | goto err_unset_master; |
1da177e4 LT |
1660 | } |
1661 | ||
35d48903 | 1662 | new_slave->bond = bond; |
1da177e4 | 1663 | new_slave->dev = slave_dev; |
0b680e75 | 1664 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1665 | |
58402054 | 1666 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1667 | /* bond_alb_init_slave() must be called before all other stages since |
1668 | * it might fail and we do not want to have to undo everything | |
1669 | */ | |
1670 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1671 | if (res) |
569f0c4d | 1672 | goto err_close; |
1da177e4 LT |
1673 | } |
1674 | ||
1675 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1676 | * master's promisc (and mc) settings only if it becomes the | |
1677 | * curr_active_slave, and that is taken care of later when calling | |
1678 | * bond_change_active() | |
1679 | */ | |
1680 | if (!USES_PRIMARY(bond->params.mode)) { | |
1681 | /* set promiscuity level to new slave */ | |
1682 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1683 | res = dev_set_promiscuity(slave_dev, 1); |
1684 | if (res) | |
1685 | goto err_close; | |
1da177e4 LT |
1686 | } |
1687 | ||
1688 | /* set allmulti level to new slave */ | |
1689 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1690 | res = dev_set_allmulti(slave_dev, 1); |
1691 | if (res) | |
1692 | goto err_close; | |
1da177e4 LT |
1693 | } |
1694 | ||
b9e40857 | 1695 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1696 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1697 | netdev_for_each_mc_addr(ha, bond_dev) |
1698 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1699 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1700 | } |
1701 | ||
1702 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1703 | /* add lacpdu mc addr to mc list */ | |
1704 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1705 | ||
22bedad3 | 1706 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1707 | } |
1708 | ||
1709 | bond_add_vlans_on_slave(bond, slave_dev); | |
1710 | ||
1711 | write_lock_bh(&bond->lock); | |
1712 | ||
1713 | bond_attach_slave(bond, new_slave); | |
1714 | ||
1715 | new_slave->delay = 0; | |
1716 | new_slave->link_failure_count = 0; | |
1717 | ||
3915c1e8 JV |
1718 | write_unlock_bh(&bond->lock); |
1719 | ||
b2a103e6 MM |
1720 | bond_compute_features(bond); |
1721 | ||
3915c1e8 JV |
1722 | read_lock(&bond->lock); |
1723 | ||
f5b2b966 JV |
1724 | new_slave->last_arp_rx = jiffies; |
1725 | ||
1da177e4 LT |
1726 | if (bond->params.miimon && !bond->params.use_carrier) { |
1727 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1728 | ||
1729 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1730 | /* | |
1731 | * miimon is set but a bonded network driver | |
1732 | * does not support ETHTOOL/MII and | |
1733 | * arp_interval is not set. Note: if | |
1734 | * use_carrier is enabled, we will never go | |
1735 | * here (because netif_carrier is always | |
1736 | * supported); thus, we don't need to change | |
1737 | * the messages for netif_carrier. | |
1738 | */ | |
a4aee5c8 | 1739 | 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 | 1740 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1741 | } else if (link_reporting == -1) { |
1742 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1743 | 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", |
1744 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1745 | } |
1746 | } | |
1747 | ||
1748 | /* check for initial state */ | |
1749 | if (!bond->params.miimon || | |
1750 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1751 | if (bond->params.updelay) { | |
a4aee5c8 | 1752 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1753 | new_slave->link = BOND_LINK_BACK; |
1754 | new_slave->delay = bond->params.updelay; | |
1755 | } else { | |
a4aee5c8 | 1756 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1757 | new_slave->link = BOND_LINK_UP; |
1758 | } | |
1759 | new_slave->jiffies = jiffies; | |
1760 | } else { | |
a4aee5c8 | 1761 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1762 | new_slave->link = BOND_LINK_DOWN; |
1763 | } | |
1764 | ||
98f41f69 | 1765 | bond_update_speed_duplex(new_slave); |
1da177e4 LT |
1766 | |
1767 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1768 | /* if there is a primary slave, remember it */ | |
a549952a | 1769 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1770 | bond->primary_slave = new_slave; |
a549952a JP |
1771 | bond->force_primary = true; |
1772 | } | |
1da177e4 LT |
1773 | } |
1774 | ||
3915c1e8 JV |
1775 | write_lock_bh(&bond->curr_slave_lock); |
1776 | ||
1da177e4 LT |
1777 | switch (bond->params.mode) { |
1778 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1779 | bond_set_slave_inactive_flags(new_slave); |
1780 | bond_select_active_slave(bond); | |
1da177e4 LT |
1781 | break; |
1782 | case BOND_MODE_8023AD: | |
1783 | /* in 802.3ad mode, the internal mechanism | |
1784 | * will activate the slaves in the selected | |
1785 | * aggregator | |
1786 | */ | |
1787 | bond_set_slave_inactive_flags(new_slave); | |
1788 | /* if this is the first slave */ | |
1789 | if (bond->slave_cnt == 1) { | |
1790 | SLAVE_AD_INFO(new_slave).id = 1; | |
1791 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1792 | * can be called only after the mac address of the bond is set | |
1793 | */ | |
56d00c67 | 1794 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1795 | } else { |
1796 | SLAVE_AD_INFO(new_slave).id = | |
1797 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1798 | } | |
1799 | ||
1800 | bond_3ad_bind_slave(new_slave); | |
1801 | break; | |
1802 | case BOND_MODE_TLB: | |
1803 | case BOND_MODE_ALB: | |
e30bc066 | 1804 | bond_set_active_slave(new_slave); |
059fe7a5 | 1805 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1806 | bond_select_active_slave(bond); |
1da177e4 LT |
1807 | break; |
1808 | default: | |
5a03cdb7 | 1809 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1810 | |
1811 | /* always active in trunk mode */ | |
e30bc066 | 1812 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1813 | |
1814 | /* In trunking mode there is little meaning to curr_active_slave | |
1815 | * anyway (it holds no special properties of the bond device), | |
1816 | * so we can change it without calling change_active_interface() | |
1817 | */ | |
3d632c3f | 1818 | if (!bond->curr_active_slave) |
1da177e4 | 1819 | bond->curr_active_slave = new_slave; |
3d632c3f | 1820 | |
1da177e4 LT |
1821 | break; |
1822 | } /* switch(bond_mode) */ | |
1823 | ||
3915c1e8 JV |
1824 | write_unlock_bh(&bond->curr_slave_lock); |
1825 | ||
ff59c456 JV |
1826 | bond_set_carrier(bond); |
1827 | ||
f6dc31a8 | 1828 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1829 | slave_dev->npinfo = bond_netpoll_info(bond); |
1830 | if (slave_dev->npinfo) { | |
1831 | if (slave_enable_netpoll(new_slave)) { | |
1832 | read_unlock(&bond->lock); | |
1833 | pr_info("Error, %s: master_dev is using netpoll, " | |
1834 | "but new slave device does not support netpoll.\n", | |
1835 | bond_dev->name); | |
1836 | res = -EBUSY; | |
f7d9821a | 1837 | goto err_detach; |
8a8efa22 | 1838 | } |
f6dc31a8 WC |
1839 | } |
1840 | #endif | |
8a8efa22 | 1841 | |
3915c1e8 | 1842 | read_unlock(&bond->lock); |
1da177e4 | 1843 | |
b76cdba9 MW |
1844 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1845 | if (res) | |
f7d9821a | 1846 | goto err_detach; |
b76cdba9 | 1847 | |
35d48903 JP |
1848 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1849 | new_slave); | |
1850 | if (res) { | |
1851 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1852 | goto err_dest_symlinks; | |
1853 | } | |
1854 | ||
a4aee5c8 JP |
1855 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1856 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1857 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1858 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1859 | |
1860 | /* enslave is successful */ | |
1861 | return 0; | |
1862 | ||
1863 | /* Undo stages on error */ | |
35d48903 JP |
1864 | err_dest_symlinks: |
1865 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1866 | ||
f7d9821a | 1867 | err_detach: |
1868 | write_lock_bh(&bond->lock); | |
1869 | bond_detach_slave(bond, new_slave); | |
1870 | write_unlock_bh(&bond->lock); | |
1871 | ||
1da177e4 LT |
1872 | err_close: |
1873 | dev_close(slave_dev); | |
1874 | ||
569f0c4d | 1875 | err_unset_master: |
1765a575 | 1876 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1877 | |
1da177e4 | 1878 | err_restore_mac: |
dd957c57 | 1879 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1880 | /* XXX TODO - fom follow mode needs to change master's |
1881 | * MAC if this slave's MAC is in use by the bond, or at | |
1882 | * least print a warning. | |
1883 | */ | |
2ab82852 MS |
1884 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1885 | addr.sa_family = slave_dev->type; | |
1886 | dev_set_mac_address(slave_dev, &addr); | |
1887 | } | |
1da177e4 | 1888 | |
b15ba0fb JP |
1889 | err_restore_mtu: |
1890 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1891 | ||
1da177e4 LT |
1892 | err_free: |
1893 | kfree(new_slave); | |
1894 | ||
1895 | err_undo_flags: | |
b2a103e6 | 1896 | bond_compute_features(bond); |
3d632c3f | 1897 | |
1da177e4 LT |
1898 | return res; |
1899 | } | |
1900 | ||
1901 | /* | |
1902 | * Try to release the slave device <slave> from the bond device <master> | |
1903 | * It is legal to access curr_active_slave without a lock because all the function | |
1904 | * is write-locked. | |
1905 | * | |
1906 | * The rules for slave state should be: | |
1907 | * for Active/Backup: | |
1908 | * Active stays on all backups go down | |
1909 | * for Bonded connections: | |
1910 | * The first up interface should be left on and all others downed. | |
1911 | */ | |
a77b5325 | 1912 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1913 | { |
454d7c9b | 1914 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1915 | struct slave *slave, *oldcurrent; |
1916 | struct sockaddr addr; | |
c8f44aff | 1917 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1918 | |
1919 | /* slave is not a slave or master is not master of this slave */ | |
1920 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1921 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1922 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1923 | bond_dev->name, slave_dev->name); |
1924 | return -EINVAL; | |
1925 | } | |
1926 | ||
e843fa50 | 1927 | block_netpoll_tx(); |
daf9209b | 1928 | netdev_bonding_change(bond_dev, NETDEV_RELEASE); |
1da177e4 LT |
1929 | write_lock_bh(&bond->lock); |
1930 | ||
1931 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1932 | if (!slave) { | |
1933 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1934 | pr_info("%s: %s not enslaved\n", |
1935 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1936 | write_unlock_bh(&bond->lock); |
e843fa50 | 1937 | unblock_netpoll_tx(); |
1da177e4 LT |
1938 | return -EINVAL; |
1939 | } | |
1940 | ||
35d48903 JP |
1941 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1942 | * for this slave anymore. | |
1943 | */ | |
1944 | netdev_rx_handler_unregister(slave_dev); | |
1945 | write_unlock_bh(&bond->lock); | |
1946 | synchronize_net(); | |
1947 | write_lock_bh(&bond->lock); | |
1948 | ||
3915c1e8 | 1949 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1950 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1951 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1952 | 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", |
1953 | bond_dev->name, slave_dev->name, | |
1954 | slave->perm_hwaddr, | |
1955 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1956 | } |
1957 | ||
1958 | /* Inform AD package of unbinding of slave. */ | |
1959 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1960 | /* must be called before the slave is | |
1961 | * detached from the list | |
1962 | */ | |
1963 | bond_3ad_unbind_slave(slave); | |
1964 | } | |
1965 | ||
a4aee5c8 JP |
1966 | pr_info("%s: releasing %s interface %s\n", |
1967 | bond_dev->name, | |
e30bc066 | 1968 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 1969 | slave_dev->name); |
1da177e4 LT |
1970 | |
1971 | oldcurrent = bond->curr_active_slave; | |
1972 | ||
1973 | bond->current_arp_slave = NULL; | |
1974 | ||
1975 | /* release the slave from its bond */ | |
1976 | bond_detach_slave(bond, slave); | |
1977 | ||
3d632c3f | 1978 | if (bond->primary_slave == slave) |
1da177e4 | 1979 | bond->primary_slave = NULL; |
1da177e4 | 1980 | |
3d632c3f | 1981 | if (oldcurrent == slave) |
1da177e4 | 1982 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1983 | |
58402054 | 1984 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1985 | /* Must be called only after the slave has been |
1986 | * detached from the list and the curr_active_slave | |
1987 | * has been cleared (if our_slave == old_current), | |
1988 | * but before a new active slave is selected. | |
1989 | */ | |
2543331d | 1990 | write_unlock_bh(&bond->lock); |
1da177e4 | 1991 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1992 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1993 | } |
1994 | ||
059fe7a5 JV |
1995 | if (oldcurrent == slave) { |
1996 | /* | |
1997 | * Note that we hold RTNL over this sequence, so there | |
1998 | * is no concern that another slave add/remove event | |
1999 | * will interfere. | |
2000 | */ | |
2001 | write_unlock_bh(&bond->lock); | |
2002 | read_lock(&bond->lock); | |
2003 | write_lock_bh(&bond->curr_slave_lock); | |
2004 | ||
1da177e4 LT |
2005 | bond_select_active_slave(bond); |
2006 | ||
059fe7a5 JV |
2007 | write_unlock_bh(&bond->curr_slave_lock); |
2008 | read_unlock(&bond->lock); | |
2009 | write_lock_bh(&bond->lock); | |
2010 | } | |
2011 | ||
1da177e4 | 2012 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
2013 | bond_set_carrier(bond); |
2014 | ||
1da177e4 LT |
2015 | /* if the last slave was removed, zero the mac address |
2016 | * of the master so it will be set by the application | |
2017 | * to the mac address of the first slave | |
2018 | */ | |
2019 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2020 | ||
cc0e4070 | 2021 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2022 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2023 | bond_dev->name, bond_dev->name); | |
2024 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2025 | bond_dev->name); | |
1da177e4 | 2026 | } |
1da177e4 LT |
2027 | } |
2028 | ||
2029 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2030 | unblock_netpoll_tx(); |
1da177e4 | 2031 | |
b2a103e6 MM |
2032 | bond_compute_features(bond); |
2033 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2034 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2035 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2036 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2037 | ||
b76cdba9 MW |
2038 | /* must do this from outside any spinlocks */ |
2039 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2040 | ||
1da177e4 LT |
2041 | bond_del_vlans_from_slave(bond, slave_dev); |
2042 | ||
2043 | /* If the mode USES_PRIMARY, then we should only remove its | |
2044 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2045 | * already taken care of above when we detached the slave | |
2046 | */ | |
2047 | if (!USES_PRIMARY(bond->params.mode)) { | |
2048 | /* unset promiscuity level from slave */ | |
3d632c3f | 2049 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2050 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2051 | |
2052 | /* unset allmulti level from slave */ | |
3d632c3f | 2053 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2054 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2055 | |
2056 | /* flush master's mc_list from slave */ | |
b9e40857 | 2057 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2058 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2059 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2060 | } |
2061 | ||
1765a575 | 2062 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2063 | |
8a8efa22 | 2064 | slave_disable_netpoll(slave); |
f6dc31a8 | 2065 | |
1da177e4 LT |
2066 | /* close slave before restoring its mac address */ |
2067 | dev_close(slave_dev); | |
2068 | ||
3915c1e8 | 2069 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2070 | /* restore original ("permanent") mac address */ |
2071 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2072 | addr.sa_family = slave_dev->type; | |
2073 | dev_set_mac_address(slave_dev, &addr); | |
2074 | } | |
1da177e4 | 2075 | |
b15ba0fb JP |
2076 | dev_set_mtu(slave_dev, slave->original_mtu); |
2077 | ||
2d7011ca | 2078 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2079 | |
2080 | kfree(slave); | |
2081 | ||
2082 | return 0; /* deletion OK */ | |
2083 | } | |
2084 | ||
d90a162a | 2085 | /* |
dadaa10b | 2086 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2087 | * Must be under rtnl_lock when this function is called. |
2088 | */ | |
26d8ee75 | 2089 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2090 | struct net_device *slave_dev) | |
d90a162a | 2091 | { |
454d7c9b | 2092 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2093 | int ret; |
2094 | ||
2095 | ret = bond_release(bond_dev, slave_dev); | |
2096 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2097 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2098 | pr_info("%s: destroying bond %s.\n", |
2099 | bond_dev->name, bond_dev->name); | |
9e71626c | 2100 | unregister_netdevice(bond_dev); |
d90a162a MS |
2101 | } |
2102 | return ret; | |
2103 | } | |
2104 | ||
1da177e4 LT |
2105 | /* |
2106 | * This function releases all slaves. | |
2107 | */ | |
2108 | static int bond_release_all(struct net_device *bond_dev) | |
2109 | { | |
454d7c9b | 2110 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2111 | struct slave *slave; |
2112 | struct net_device *slave_dev; | |
2113 | struct sockaddr addr; | |
2114 | ||
2115 | write_lock_bh(&bond->lock); | |
2116 | ||
ff59c456 JV |
2117 | netif_carrier_off(bond_dev); |
2118 | ||
3d632c3f | 2119 | if (bond->slave_cnt == 0) |
1da177e4 | 2120 | goto out; |
1da177e4 LT |
2121 | |
2122 | bond->current_arp_slave = NULL; | |
2123 | bond->primary_slave = NULL; | |
2124 | bond_change_active_slave(bond, NULL); | |
2125 | ||
2126 | while ((slave = bond->first_slave) != NULL) { | |
2127 | /* Inform AD package of unbinding of slave | |
2128 | * before slave is detached from the list. | |
2129 | */ | |
3d632c3f | 2130 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2131 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2132 | |
2133 | slave_dev = slave->dev; | |
2134 | bond_detach_slave(bond, slave); | |
2135 | ||
2543331d JV |
2136 | /* now that the slave is detached, unlock and perform |
2137 | * all the undo steps that should not be called from | |
2138 | * within a lock. | |
2139 | */ | |
2140 | write_unlock_bh(&bond->lock); | |
2141 | ||
35d48903 JP |
2142 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2143 | * be called for this slave anymore. | |
2144 | */ | |
2145 | netdev_rx_handler_unregister(slave_dev); | |
2146 | synchronize_net(); | |
2147 | ||
58402054 | 2148 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2149 | /* must be called only after the slave |
2150 | * has been detached from the list | |
2151 | */ | |
2152 | bond_alb_deinit_slave(bond, slave); | |
2153 | } | |
2154 | ||
b76cdba9 | 2155 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2156 | bond_del_vlans_from_slave(bond, slave_dev); |
2157 | ||
2158 | /* If the mode USES_PRIMARY, then we should only remove its | |
2159 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2160 | * already taken care of above when we detached the slave | |
2161 | */ | |
2162 | if (!USES_PRIMARY(bond->params.mode)) { | |
2163 | /* unset promiscuity level from slave */ | |
3d632c3f | 2164 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2165 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2166 | |
2167 | /* unset allmulti level from slave */ | |
3d632c3f | 2168 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2169 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2170 | |
2171 | /* flush master's mc_list from slave */ | |
b9e40857 | 2172 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2173 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2174 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2175 | } |
2176 | ||
1765a575 | 2177 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2178 | |
8a8efa22 AW |
2179 | slave_disable_netpoll(slave); |
2180 | ||
1da177e4 LT |
2181 | /* close slave before restoring its mac address */ |
2182 | dev_close(slave_dev); | |
2183 | ||
dd957c57 | 2184 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2185 | /* restore original ("permanent") mac address*/ |
2186 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2187 | addr.sa_family = slave_dev->type; | |
2188 | dev_set_mac_address(slave_dev, &addr); | |
2189 | } | |
1da177e4 | 2190 | |
1da177e4 LT |
2191 | kfree(slave); |
2192 | ||
2193 | /* re-acquire the lock before getting the next slave */ | |
2194 | write_lock_bh(&bond->lock); | |
2195 | } | |
2196 | ||
2197 | /* zero the mac address of the master so it will be | |
2198 | * set by the application to the mac address of the | |
2199 | * first slave | |
2200 | */ | |
2201 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2202 | ||
cc0e4070 | 2203 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2204 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2205 | bond_dev->name, bond_dev->name); | |
2206 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2207 | bond_dev->name); | |
1da177e4 LT |
2208 | } |
2209 | ||
a4aee5c8 | 2210 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2211 | |
2212 | out: | |
2213 | write_unlock_bh(&bond->lock); | |
b2a103e6 MM |
2214 | |
2215 | bond_compute_features(bond); | |
2216 | ||
1da177e4 LT |
2217 | return 0; |
2218 | } | |
2219 | ||
2220 | /* | |
2221 | * This function changes the active slave to slave <slave_dev>. | |
2222 | * It returns -EINVAL in the following cases. | |
2223 | * - <slave_dev> is not found in the list. | |
2224 | * - There is not active slave now. | |
2225 | * - <slave_dev> is already active. | |
2226 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2227 | * - <slave_dev> is not running. | |
3d632c3f SH |
2228 | * In these cases, this function does nothing. |
2229 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2230 | */ |
2231 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2232 | { | |
454d7c9b | 2233 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2234 | struct slave *old_active = NULL; |
2235 | struct slave *new_active = NULL; | |
2236 | int res = 0; | |
2237 | ||
3d632c3f | 2238 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2239 | return -EINVAL; |
1da177e4 LT |
2240 | |
2241 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2242 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2243 | return -EINVAL; |
1da177e4 | 2244 | |
059fe7a5 | 2245 | read_lock(&bond->lock); |
1da177e4 | 2246 | |
059fe7a5 | 2247 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2248 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2249 | read_unlock(&bond->curr_slave_lock); |
2250 | ||
1da177e4 LT |
2251 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2252 | ||
2253 | /* | |
2254 | * Changing to the current active: do nothing; return success. | |
2255 | */ | |
2256 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2257 | read_unlock(&bond->lock); |
1da177e4 LT |
2258 | return 0; |
2259 | } | |
2260 | ||
2261 | if ((new_active) && | |
2262 | (old_active) && | |
2263 | (new_active->link == BOND_LINK_UP) && | |
2264 | IS_UP(new_active->dev)) { | |
e843fa50 | 2265 | block_netpoll_tx(); |
059fe7a5 | 2266 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2267 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2268 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2269 | unblock_netpoll_tx(); |
3d632c3f | 2270 | } else |
1da177e4 | 2271 | res = -EINVAL; |
1da177e4 | 2272 | |
059fe7a5 | 2273 | read_unlock(&bond->lock); |
1da177e4 LT |
2274 | |
2275 | return res; | |
2276 | } | |
2277 | ||
1da177e4 LT |
2278 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2279 | { | |
454d7c9b | 2280 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2281 | |
2282 | info->bond_mode = bond->params.mode; | |
2283 | info->miimon = bond->params.miimon; | |
2284 | ||
6603a6f2 | 2285 | read_lock(&bond->lock); |
1da177e4 | 2286 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2287 | read_unlock(&bond->lock); |
1da177e4 LT |
2288 | |
2289 | return 0; | |
2290 | } | |
2291 | ||
2292 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2293 | { | |
454d7c9b | 2294 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2295 | struct slave *slave; |
689c96cc | 2296 | int i, res = -ENODEV; |
1da177e4 | 2297 | |
6603a6f2 | 2298 | read_lock(&bond->lock); |
1da177e4 LT |
2299 | |
2300 | bond_for_each_slave(bond, slave, i) { | |
2301 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2302 | res = 0; |
2303 | strcpy(info->slave_name, slave->dev->name); | |
2304 | info->link = slave->link; | |
e30bc066 | 2305 | info->state = bond_slave_state(slave); |
689c96cc | 2306 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2307 | break; |
2308 | } | |
2309 | } | |
2310 | ||
6603a6f2 | 2311 | read_unlock(&bond->lock); |
1da177e4 | 2312 | |
689c96cc | 2313 | return res; |
1da177e4 LT |
2314 | } |
2315 | ||
2316 | /*-------------------------------- Monitoring -------------------------------*/ | |
2317 | ||
1da177e4 | 2318 | |
f0c76d61 JV |
2319 | static int bond_miimon_inspect(struct bonding *bond) |
2320 | { | |
2321 | struct slave *slave; | |
2322 | int i, link_state, commit = 0; | |
41f89100 JP |
2323 | bool ignore_updelay; |
2324 | ||
2325 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2326 | |
2327 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2328 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2329 | |
f0c76d61 | 2330 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2331 | |
2332 | switch (slave->link) { | |
f0c76d61 JV |
2333 | case BOND_LINK_UP: |
2334 | if (link_state) | |
2335 | continue; | |
1da177e4 | 2336 | |
f0c76d61 JV |
2337 | slave->link = BOND_LINK_FAIL; |
2338 | slave->delay = bond->params.downdelay; | |
2339 | if (slave->delay) { | |
a4aee5c8 JP |
2340 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2341 | bond->dev->name, | |
2342 | (bond->params.mode == | |
2343 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2344 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2345 | "active " : "backup ") : "", |
2346 | slave->dev->name, | |
2347 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2348 | } |
f0c76d61 JV |
2349 | /*FALLTHRU*/ |
2350 | case BOND_LINK_FAIL: | |
2351 | if (link_state) { | |
2352 | /* | |
2353 | * recovered before downdelay expired | |
2354 | */ | |
2355 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2356 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2357 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2358 | bond->dev->name, | |
2359 | (bond->params.downdelay - slave->delay) * | |
2360 | bond->params.miimon, | |
2361 | slave->dev->name); | |
f0c76d61 | 2362 | continue; |
1da177e4 | 2363 | } |
f0c76d61 JV |
2364 | |
2365 | if (slave->delay <= 0) { | |
2366 | slave->new_link = BOND_LINK_DOWN; | |
2367 | commit++; | |
2368 | continue; | |
1da177e4 | 2369 | } |
1da177e4 | 2370 | |
f0c76d61 JV |
2371 | slave->delay--; |
2372 | break; | |
2373 | ||
2374 | case BOND_LINK_DOWN: | |
2375 | if (!link_state) | |
2376 | continue; | |
2377 | ||
2378 | slave->link = BOND_LINK_BACK; | |
2379 | slave->delay = bond->params.updelay; | |
2380 | ||
2381 | if (slave->delay) { | |
a4aee5c8 JP |
2382 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2383 | bond->dev->name, slave->dev->name, | |
2384 | ignore_updelay ? 0 : | |
2385 | bond->params.updelay * | |
2386 | bond->params.miimon); | |
f0c76d61 JV |
2387 | } |
2388 | /*FALLTHRU*/ | |
2389 | case BOND_LINK_BACK: | |
2390 | if (!link_state) { | |
2391 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2392 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2393 | bond->dev->name, | |
2394 | (bond->params.updelay - slave->delay) * | |
2395 | bond->params.miimon, | |
2396 | slave->dev->name); | |
f0c76d61 JV |
2397 | |
2398 | continue; | |
2399 | } | |
2400 | ||
41f89100 JP |
2401 | if (ignore_updelay) |
2402 | slave->delay = 0; | |
2403 | ||
f0c76d61 JV |
2404 | if (slave->delay <= 0) { |
2405 | slave->new_link = BOND_LINK_UP; | |
2406 | commit++; | |
41f89100 | 2407 | ignore_updelay = false; |
f0c76d61 | 2408 | continue; |
1da177e4 | 2409 | } |
f0c76d61 JV |
2410 | |
2411 | slave->delay--; | |
1da177e4 | 2412 | break; |
f0c76d61 JV |
2413 | } |
2414 | } | |
1da177e4 | 2415 | |
f0c76d61 JV |
2416 | return commit; |
2417 | } | |
1da177e4 | 2418 | |
f0c76d61 JV |
2419 | static void bond_miimon_commit(struct bonding *bond) |
2420 | { | |
2421 | struct slave *slave; | |
2422 | int i; | |
2423 | ||
2424 | bond_for_each_slave(bond, slave, i) { | |
2425 | switch (slave->new_link) { | |
2426 | case BOND_LINK_NOCHANGE: | |
2427 | continue; | |
1da177e4 | 2428 | |
f0c76d61 JV |
2429 | case BOND_LINK_UP: |
2430 | slave->link = BOND_LINK_UP; | |
2431 | slave->jiffies = jiffies; | |
2432 | ||
2433 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2434 | /* prevent it from being the active one */ | |
e30bc066 | 2435 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2436 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2437 | /* make it immediately active */ | |
e30bc066 | 2438 | bond_set_active_slave(slave); |
f0c76d61 JV |
2439 | } else if (slave != bond->primary_slave) { |
2440 | /* prevent it from being the active one */ | |
e30bc066 | 2441 | bond_set_backup_slave(slave); |
1da177e4 | 2442 | } |
1da177e4 | 2443 | |
546add79 KPO |
2444 | bond_update_speed_duplex(slave); |
2445 | ||
5d30530e | 2446 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2447 | bond->dev->name, slave->dev->name, |
2448 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2449 | |
f0c76d61 JV |
2450 | /* notify ad that the link status has changed */ |
2451 | if (bond->params.mode == BOND_MODE_8023AD) | |
2452 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2453 | |
58402054 | 2454 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2455 | bond_alb_handle_link_change(bond, slave, |
2456 | BOND_LINK_UP); | |
1da177e4 | 2457 | |
f0c76d61 JV |
2458 | if (!bond->curr_active_slave || |
2459 | (slave == bond->primary_slave)) | |
2460 | goto do_failover; | |
1da177e4 | 2461 | |
f0c76d61 | 2462 | continue; |
059fe7a5 | 2463 | |
f0c76d61 | 2464 | case BOND_LINK_DOWN: |
fba4acda JV |
2465 | if (slave->link_failure_count < UINT_MAX) |
2466 | slave->link_failure_count++; | |
2467 | ||
f0c76d61 | 2468 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2469 | |
f0c76d61 JV |
2470 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2471 | bond->params.mode == BOND_MODE_8023AD) | |
2472 | bond_set_slave_inactive_flags(slave); | |
2473 | ||
a4aee5c8 JP |
2474 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2475 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2476 | |
2477 | if (bond->params.mode == BOND_MODE_8023AD) | |
2478 | bond_3ad_handle_link_change(slave, | |
2479 | BOND_LINK_DOWN); | |
2480 | ||
ae63e808 | 2481 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2482 | bond_alb_handle_link_change(bond, slave, |
2483 | BOND_LINK_DOWN); | |
2484 | ||
2485 | if (slave == bond->curr_active_slave) | |
2486 | goto do_failover; | |
2487 | ||
2488 | continue; | |
2489 | ||
2490 | default: | |
a4aee5c8 | 2491 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2492 | bond->dev->name, slave->new_link, |
2493 | slave->dev->name); | |
2494 | slave->new_link = BOND_LINK_NOCHANGE; | |
2495 | ||
2496 | continue; | |
2497 | } | |
2498 | ||
2499 | do_failover: | |
2500 | ASSERT_RTNL(); | |
e843fa50 | 2501 | block_netpoll_tx(); |
f0c76d61 JV |
2502 | write_lock_bh(&bond->curr_slave_lock); |
2503 | bond_select_active_slave(bond); | |
2504 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2505 | unblock_netpoll_tx(); |
f0c76d61 JV |
2506 | } |
2507 | ||
2508 | bond_set_carrier(bond); | |
1da177e4 LT |
2509 | } |
2510 | ||
0b0eef66 JV |
2511 | /* |
2512 | * bond_mii_monitor | |
2513 | * | |
2514 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2515 | * inspection, then (if inspection indicates something needs to be done) |
2516 | * an acquisition of appropriate locks followed by a commit phase to | |
2517 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2518 | */ |
2519 | void bond_mii_monitor(struct work_struct *work) | |
2520 | { | |
2521 | struct bonding *bond = container_of(work, struct bonding, | |
2522 | mii_work.work); | |
ad246c99 | 2523 | bool should_notify_peers = false; |
e6d265e8 | 2524 | unsigned long delay; |
0b0eef66 JV |
2525 | |
2526 | read_lock(&bond->lock); | |
e6d265e8 JV |
2527 | |
2528 | delay = msecs_to_jiffies(bond->params.miimon); | |
f0c76d61 JV |
2529 | |
2530 | if (bond->slave_cnt == 0) | |
2531 | goto re_arm; | |
b59f9f74 | 2532 | |
ad246c99 BH |
2533 | should_notify_peers = bond_should_notify_peers(bond); |
2534 | ||
f0c76d61 | 2535 | if (bond_miimon_inspect(bond)) { |
0b0eef66 | 2536 | read_unlock(&bond->lock); |
e6d265e8 JV |
2537 | |
2538 | /* Race avoidance with bond_close cancel of workqueue */ | |
2539 | if (!rtnl_trylock()) { | |
2540 | read_lock(&bond->lock); | |
2541 | delay = 1; | |
2542 | should_notify_peers = false; | |
2543 | goto re_arm; | |
2544 | } | |
2545 | ||
0b0eef66 | 2546 | read_lock(&bond->lock); |
f0c76d61 JV |
2547 | |
2548 | bond_miimon_commit(bond); | |
2549 | ||
5655662d JV |
2550 | read_unlock(&bond->lock); |
2551 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2552 | read_lock(&bond->lock); | |
0b0eef66 JV |
2553 | } |
2554 | ||
f0c76d61 | 2555 | re_arm: |
e6d265e8 JV |
2556 | if (bond->params.miimon) |
2557 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2558 | ||
0b0eef66 | 2559 | read_unlock(&bond->lock); |
ad246c99 BH |
2560 | |
2561 | if (should_notify_peers) { | |
e6d265e8 JV |
2562 | if (!rtnl_trylock()) { |
2563 | read_lock(&bond->lock); | |
2564 | bond->send_peer_notif++; | |
2565 | read_unlock(&bond->lock); | |
2566 | return; | |
2567 | } | |
ad246c99 BH |
2568 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
2569 | rtnl_unlock(); | |
2570 | } | |
0b0eef66 | 2571 | } |
c3ade5ca | 2572 | |
d3bb52b0 | 2573 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2574 | { |
0883beca | 2575 | struct vlan_entry *vlan; |
f5b2b966 JV |
2576 | |
2577 | if (ip == bond->master_ip) | |
2578 | return 1; | |
2579 | ||
0883beca | 2580 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2581 | if (ip == vlan->vlan_ip) |
2582 | return 1; | |
2583 | } | |
2584 | ||
2585 | return 0; | |
2586 | } | |
2587 | ||
c3ade5ca JV |
2588 | /* |
2589 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2590 | * switches in VLAN mode (especially if ports are configured as | |
2591 | * "native" to a VLAN) might not pass non-tagged frames. | |
2592 | */ | |
d3bb52b0 | 2593 | 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 |
2594 | { |
2595 | struct sk_buff *skb; | |
2596 | ||
5a03cdb7 | 2597 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2598 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2599 | |
c3ade5ca JV |
2600 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2601 | NULL, slave_dev->dev_addr, NULL); | |
2602 | ||
2603 | if (!skb) { | |
a4aee5c8 | 2604 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2605 | return; |
2606 | } | |
2607 | if (vlan_id) { | |
2608 | skb = vlan_put_tag(skb, vlan_id); | |
2609 | if (!skb) { | |
a4aee5c8 | 2610 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2611 | return; |
2612 | } | |
2613 | } | |
2614 | arp_xmit(skb); | |
2615 | } | |
2616 | ||
2617 | ||
1da177e4 LT |
2618 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2619 | { | |
b23dd4fe | 2620 | int i, vlan_id; |
d3bb52b0 | 2621 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2622 | struct vlan_entry *vlan; |
c3ade5ca | 2623 | struct net_device *vlan_dev; |
c3ade5ca | 2624 | struct rtable *rt; |
1da177e4 | 2625 | |
6b780567 MW |
2626 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2627 | if (!targets[i]) | |
5a31bec0 | 2628 | break; |
5a03cdb7 | 2629 | pr_debug("basa: target %x\n", targets[i]); |
cc0e4070 | 2630 | if (!bond_vlan_used(bond)) { |
5a03cdb7 | 2631 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2632 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2633 | bond->master_ip, 0); | |
2634 | continue; | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | * If VLANs are configured, we do a route lookup to | |
2639 | * determine which VLAN interface would be used, so we | |
2640 | * can tag the ARP with the proper VLAN tag. | |
2641 | */ | |
78fbfd8a DM |
2642 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2643 | RTO_ONLINK, 0); | |
b23dd4fe | 2644 | if (IS_ERR(rt)) { |
c3ade5ca | 2645 | if (net_ratelimit()) { |
a4aee5c8 | 2646 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2647 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2648 | } |
2649 | continue; | |
2650 | } | |
2651 | ||
2652 | /* | |
2653 | * This target is not on a VLAN | |
2654 | */ | |
d8d1f30b | 2655 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2656 | ip_rt_put(rt); |
5a03cdb7 | 2657 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2658 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2659 | bond->master_ip, 0); | |
2660 | continue; | |
2661 | } | |
2662 | ||
2663 | vlan_id = 0; | |
0883beca | 2664 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
2665 | rcu_read_lock(); |
2666 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
2667 | vlan->vlan_id); | |
2668 | rcu_read_unlock(); | |
d8d1f30b | 2669 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2670 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2671 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2672 | vlan_dev->name, vlan_id); |
2673 | break; | |
2674 | } | |
2675 | } | |
2676 | ||
2677 | if (vlan_id) { | |
ed4b9f80 | 2678 | ip_rt_put(rt); |
c3ade5ca JV |
2679 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2680 | vlan->vlan_ip, vlan_id); | |
2681 | continue; | |
2682 | } | |
2683 | ||
2684 | if (net_ratelimit()) { | |
a4aee5c8 | 2685 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2686 | bond->dev->name, &targets[i], |
d8d1f30b | 2687 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2688 | } |
ed4b9f80 | 2689 | ip_rt_put(rt); |
c3ade5ca JV |
2690 | } |
2691 | } | |
2692 | ||
d3bb52b0 | 2693 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2694 | { |
2695 | int i; | |
d3bb52b0 | 2696 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2697 | |
f5b2b966 | 2698 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2699 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2700 | &sip, &tip, i, &targets[i], |
2701 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2702 | if (sip == targets[i]) { |
2703 | if (bond_has_this_ip(bond, tip)) | |
2704 | slave->last_arp_rx = jiffies; | |
2705 | return; | |
2706 | } | |
2707 | } | |
2708 | } | |
2709 | ||
3aba891d JP |
2710 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2711 | struct slave *slave) | |
f5b2b966 JV |
2712 | { |
2713 | struct arphdr *arp; | |
f5b2b966 | 2714 | unsigned char *arp_ptr; |
d3bb52b0 | 2715 | __be32 sip, tip; |
f5b2b966 | 2716 | |
3aba891d JP |
2717 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2718 | return; | |
f5b2b966 | 2719 | |
f5b2b966 JV |
2720 | read_lock(&bond->lock); |
2721 | ||
3aba891d JP |
2722 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2723 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2724 | |
3aba891d | 2725 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2726 | goto out_unlock; |
2727 | ||
d0a92be0 | 2728 | arp = arp_hdr(skb); |
3aba891d | 2729 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2730 | skb->pkt_type == PACKET_OTHERHOST || |
2731 | skb->pkt_type == PACKET_LOOPBACK || | |
2732 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2733 | arp->ar_pro != htons(ETH_P_IP) || | |
2734 | arp->ar_pln != 4) | |
2735 | goto out_unlock; | |
2736 | ||
2737 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2738 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2739 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2740 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2741 | memcpy(&tip, arp_ptr, 4); |
2742 | ||
5a03cdb7 | 2743 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2744 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2745 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2746 | &sip, &tip); | |
f5b2b966 JV |
2747 | |
2748 | /* | |
2749 | * Backup slaves won't see the ARP reply, but do come through | |
2750 | * here for each ARP probe (so we swap the sip/tip to validate | |
2751 | * the probe). In a "redundant switch, common router" type of | |
2752 | * configuration, the ARP probe will (hopefully) travel from | |
2753 | * the active, through one switch, the router, then the other | |
2754 | * switch before reaching the backup. | |
2755 | */ | |
e30bc066 | 2756 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2757 | bond_validate_arp(bond, slave, sip, tip); |
2758 | else | |
2759 | bond_validate_arp(bond, slave, tip, sip); | |
2760 | ||
2761 | out_unlock: | |
2762 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2763 | } |
2764 | ||
1da177e4 LT |
2765 | /* |
2766 | * this function is called regularly to monitor each slave's link | |
2767 | * ensuring that traffic is being sent and received when arp monitoring | |
2768 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2769 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2770 | * arp monitoring in active backup mode. | |
2771 | */ | |
1b76b316 | 2772 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2773 | { |
1b76b316 JV |
2774 | struct bonding *bond = container_of(work, struct bonding, |
2775 | arp_work.work); | |
1da177e4 LT |
2776 | struct slave *slave, *oldcurrent; |
2777 | int do_failover = 0; | |
2778 | int delta_in_ticks; | |
2779 | int i; | |
2780 | ||
2781 | read_lock(&bond->lock); | |
2782 | ||
5ce0da8f | 2783 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2784 | |
3d632c3f | 2785 | if (bond->slave_cnt == 0) |
1da177e4 | 2786 | goto re_arm; |
1da177e4 LT |
2787 | |
2788 | read_lock(&bond->curr_slave_lock); | |
2789 | oldcurrent = bond->curr_active_slave; | |
2790 | read_unlock(&bond->curr_slave_lock); | |
2791 | ||
2792 | /* see if any of the previous devices are up now (i.e. they have | |
2793 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2794 | * the picture unless it is null. also, slave->jiffies is not needed | |
2795 | * here because we send an arp on each slave and give a slave as | |
2796 | * long as it needs to get the tx/rx within the delta. | |
2797 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2798 | * so it can wait | |
2799 | */ | |
2800 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2801 | unsigned long trans_start = dev_trans_start(slave->dev); |
2802 | ||
1da177e4 | 2803 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2804 | if (time_in_range(jiffies, |
2805 | trans_start - delta_in_ticks, | |
2806 | trans_start + delta_in_ticks) && | |
2807 | time_in_range(jiffies, | |
2808 | slave->dev->last_rx - delta_in_ticks, | |
2809 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2810 | |
2811 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2812 | bond_set_active_slave(slave); |
1da177e4 LT |
2813 | |
2814 | /* primary_slave has no meaning in round-robin | |
2815 | * mode. the window of a slave being up and | |
2816 | * curr_active_slave being null after enslaving | |
2817 | * is closed. | |
2818 | */ | |
2819 | if (!oldcurrent) { | |
a4aee5c8 JP |
2820 | pr_info("%s: link status definitely up for interface %s, ", |
2821 | bond->dev->name, | |
2822 | slave->dev->name); | |
1da177e4 LT |
2823 | do_failover = 1; |
2824 | } else { | |
a4aee5c8 JP |
2825 | pr_info("%s: interface %s is now up\n", |
2826 | bond->dev->name, | |
2827 | slave->dev->name); | |
1da177e4 LT |
2828 | } |
2829 | } | |
2830 | } else { | |
2831 | /* slave->link == BOND_LINK_UP */ | |
2832 | ||
2833 | /* not all switches will respond to an arp request | |
2834 | * when the source ip is 0, so don't take the link down | |
2835 | * if we don't know our ip yet | |
2836 | */ | |
cb32f2a0 JB |
2837 | if (!time_in_range(jiffies, |
2838 | trans_start - delta_in_ticks, | |
2839 | trans_start + 2 * delta_in_ticks) || | |
2840 | !time_in_range(jiffies, | |
2841 | slave->dev->last_rx - delta_in_ticks, | |
2842 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2843 | |
2844 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2845 | bond_set_backup_slave(slave); |
1da177e4 | 2846 | |
3d632c3f | 2847 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2848 | slave->link_failure_count++; |
1da177e4 | 2849 | |
a4aee5c8 JP |
2850 | pr_info("%s: interface %s is now down.\n", |
2851 | bond->dev->name, | |
2852 | slave->dev->name); | |
1da177e4 | 2853 | |
3d632c3f | 2854 | if (slave == oldcurrent) |
1da177e4 | 2855 | do_failover = 1; |
1da177e4 LT |
2856 | } |
2857 | } | |
2858 | ||
2859 | /* note: if switch is in round-robin mode, all links | |
2860 | * must tx arp to ensure all links rx an arp - otherwise | |
2861 | * links may oscillate or not come up at all; if switch is | |
2862 | * in something like xor mode, there is nothing we can | |
2863 | * do - all replies will be rx'ed on same link causing slaves | |
2864 | * to be unstable during low/no traffic periods | |
2865 | */ | |
3d632c3f | 2866 | if (IS_UP(slave->dev)) |
1da177e4 | 2867 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2868 | } |
2869 | ||
2870 | if (do_failover) { | |
e843fa50 | 2871 | block_netpoll_tx(); |
059fe7a5 | 2872 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2873 | |
2874 | bond_select_active_slave(bond); | |
2875 | ||
059fe7a5 | 2876 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2877 | unblock_netpoll_tx(); |
1da177e4 LT |
2878 | } |
2879 | ||
2880 | re_arm: | |
e6d265e8 | 2881 | if (bond->params.arp_interval) |
1b76b316 | 2882 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 2883 | |
1da177e4 LT |
2884 | read_unlock(&bond->lock); |
2885 | } | |
2886 | ||
2887 | /* | |
b2220cad JV |
2888 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2889 | * changes. Sets new_link in slaves to specify what action should take | |
2890 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2891 | * to link states must be committed. | |
2892 | * | |
2893 | * Called with bond->lock held for read. | |
1da177e4 | 2894 | */ |
b2220cad | 2895 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2896 | { |
1da177e4 | 2897 | struct slave *slave; |
b2220cad | 2898 | int i, commit = 0; |
cb32f2a0 | 2899 | unsigned long trans_start; |
1da177e4 | 2900 | |
b2220cad JV |
2901 | bond_for_each_slave(bond, slave, i) { |
2902 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2903 | |
b2220cad | 2904 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2905 | if (time_in_range(jiffies, |
2906 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2907 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2908 | ||
b2220cad JV |
2909 | slave->new_link = BOND_LINK_UP; |
2910 | commit++; | |
2911 | } | |
1da177e4 | 2912 | |
b2220cad JV |
2913 | continue; |
2914 | } | |
1da177e4 | 2915 | |
b2220cad JV |
2916 | /* |
2917 | * Give slaves 2*delta after being enslaved or made | |
2918 | * active. This avoids bouncing, as the last receive | |
2919 | * times need a full ARP monitor cycle to be updated. | |
2920 | */ | |
cb32f2a0 JB |
2921 | if (time_in_range(jiffies, |
2922 | slave->jiffies - delta_in_ticks, | |
2923 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
2924 | continue; |
2925 | ||
2926 | /* | |
2927 | * Backup slave is down if: | |
2928 | * - No current_arp_slave AND | |
2929 | * - more than 3*delta since last receive AND | |
2930 | * - the bond has an IP address | |
2931 | * | |
2932 | * Note: a non-null current_arp_slave indicates | |
2933 | * the curr_active_slave went down and we are | |
2934 | * searching for a new one; under this condition | |
2935 | * we only take the curr_active_slave down - this | |
2936 | * gives each slave a chance to tx/rx traffic | |
2937 | * before being taken out | |
2938 | */ | |
e30bc066 | 2939 | if (!bond_is_active_slave(slave) && |
b2220cad | 2940 | !bond->current_arp_slave && |
cb32f2a0 JB |
2941 | !time_in_range(jiffies, |
2942 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2943 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
2944 | ||
b2220cad JV |
2945 | slave->new_link = BOND_LINK_DOWN; |
2946 | commit++; | |
2947 | } | |
2948 | ||
2949 | /* | |
2950 | * Active slave is down if: | |
2951 | * - more than 2*delta since transmitting OR | |
2952 | * - (more than 2*delta since receive AND | |
2953 | * the bond has an IP address) | |
2954 | */ | |
cb32f2a0 | 2955 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2956 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
2957 | (!time_in_range(jiffies, |
2958 | trans_start - delta_in_ticks, | |
2959 | trans_start + 2 * delta_in_ticks) || | |
2960 | !time_in_range(jiffies, | |
2961 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2962 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
2963 | ||
b2220cad JV |
2964 | slave->new_link = BOND_LINK_DOWN; |
2965 | commit++; | |
2966 | } | |
1da177e4 LT |
2967 | } |
2968 | ||
b2220cad JV |
2969 | return commit; |
2970 | } | |
1da177e4 | 2971 | |
b2220cad JV |
2972 | /* |
2973 | * Called to commit link state changes noted by inspection step of | |
2974 | * active-backup mode ARP monitor. | |
2975 | * | |
2976 | * Called with RTNL and bond->lock for read. | |
2977 | */ | |
2978 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2979 | { | |
2980 | struct slave *slave; | |
2981 | int i; | |
cb32f2a0 | 2982 | unsigned long trans_start; |
1da177e4 | 2983 | |
b2220cad JV |
2984 | bond_for_each_slave(bond, slave, i) { |
2985 | switch (slave->new_link) { | |
2986 | case BOND_LINK_NOCHANGE: | |
2987 | continue; | |
ff59c456 | 2988 | |
b2220cad | 2989 | case BOND_LINK_UP: |
cb32f2a0 | 2990 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 2991 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
2992 | time_in_range(jiffies, |
2993 | trans_start - delta_in_ticks, | |
2994 | trans_start + delta_in_ticks)) || | |
b9f60253 | 2995 | bond->curr_active_slave != slave) { |
b2220cad | 2996 | slave->link = BOND_LINK_UP; |
b2220cad JV |
2997 | bond->current_arp_slave = NULL; |
2998 | ||
a4aee5c8 | 2999 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3000 | bond->dev->name, slave->dev->name); |
b2220cad | 3001 | |
b9f60253 JP |
3002 | if (!bond->curr_active_slave || |
3003 | (slave == bond->primary_slave)) | |
3004 | goto do_failover; | |
1da177e4 | 3005 | |
b9f60253 | 3006 | } |
1da177e4 | 3007 | |
b9f60253 | 3008 | continue; |
1da177e4 | 3009 | |
b2220cad JV |
3010 | case BOND_LINK_DOWN: |
3011 | if (slave->link_failure_count < UINT_MAX) | |
3012 | slave->link_failure_count++; | |
3013 | ||
3014 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3015 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3016 | |
a4aee5c8 | 3017 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3018 | bond->dev->name, slave->dev->name); |
b2220cad | 3019 | |
b9f60253 | 3020 | if (slave == bond->curr_active_slave) { |
b2220cad | 3021 | bond->current_arp_slave = NULL; |
b9f60253 | 3022 | goto do_failover; |
1da177e4 | 3023 | } |
b9f60253 JP |
3024 | |
3025 | continue; | |
b2220cad JV |
3026 | |
3027 | default: | |
a4aee5c8 | 3028 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3029 | bond->dev->name, slave->new_link, |
3030 | slave->dev->name); | |
b9f60253 | 3031 | continue; |
1da177e4 | 3032 | } |
1da177e4 | 3033 | |
b9f60253 JP |
3034 | do_failover: |
3035 | ASSERT_RTNL(); | |
e843fa50 | 3036 | block_netpoll_tx(); |
b2220cad | 3037 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3038 | bond_select_active_slave(bond); |
b2220cad | 3039 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3040 | unblock_netpoll_tx(); |
b2220cad | 3041 | } |
1da177e4 | 3042 | |
b2220cad JV |
3043 | bond_set_carrier(bond); |
3044 | } | |
1da177e4 | 3045 | |
b2220cad JV |
3046 | /* |
3047 | * Send ARP probes for active-backup mode ARP monitor. | |
3048 | * | |
3049 | * Called with bond->lock held for read. | |
3050 | */ | |
3051 | static void bond_ab_arp_probe(struct bonding *bond) | |
3052 | { | |
3053 | struct slave *slave; | |
3054 | int i; | |
1da177e4 | 3055 | |
b2220cad | 3056 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3057 | |
b2220cad | 3058 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3059 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3060 | bond->current_arp_slave->dev->name, | |
3061 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3062 | |
b2220cad JV |
3063 | if (bond->curr_active_slave) { |
3064 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3065 | read_unlock(&bond->curr_slave_lock); | |
3066 | return; | |
3067 | } | |
1da177e4 | 3068 | |
b2220cad | 3069 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3070 | |
b2220cad JV |
3071 | /* if we don't have a curr_active_slave, search for the next available |
3072 | * backup slave from the current_arp_slave and make it the candidate | |
3073 | * for becoming the curr_active_slave | |
3074 | */ | |
1da177e4 | 3075 | |
b2220cad JV |
3076 | if (!bond->current_arp_slave) { |
3077 | bond->current_arp_slave = bond->first_slave; | |
3078 | if (!bond->current_arp_slave) | |
3079 | return; | |
3080 | } | |
1da177e4 | 3081 | |
b2220cad | 3082 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3083 | |
b2220cad JV |
3084 | /* search for next candidate */ |
3085 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3086 | if (IS_UP(slave->dev)) { | |
3087 | slave->link = BOND_LINK_BACK; | |
3088 | bond_set_slave_active_flags(slave); | |
3089 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3090 | slave->jiffies = jiffies; |
b2220cad JV |
3091 | bond->current_arp_slave = slave; |
3092 | break; | |
1da177e4 LT |
3093 | } |
3094 | ||
b2220cad JV |
3095 | /* if the link state is up at this point, we |
3096 | * mark it down - this can happen if we have | |
3097 | * simultaneous link failures and | |
3098 | * reselect_active_interface doesn't make this | |
3099 | * one the current slave so it is still marked | |
3100 | * up when it is actually down | |
1da177e4 | 3101 | */ |
b2220cad JV |
3102 | if (slave->link == BOND_LINK_UP) { |
3103 | slave->link = BOND_LINK_DOWN; | |
3104 | if (slave->link_failure_count < UINT_MAX) | |
3105 | slave->link_failure_count++; | |
1da177e4 | 3106 | |
b2220cad JV |
3107 | bond_set_slave_inactive_flags(slave); |
3108 | ||
a4aee5c8 JP |
3109 | pr_info("%s: backup interface %s is now down.\n", |
3110 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3111 | } |
b2220cad JV |
3112 | } |
3113 | } | |
1da177e4 | 3114 | |
b2220cad JV |
3115 | void bond_activebackup_arp_mon(struct work_struct *work) |
3116 | { | |
3117 | struct bonding *bond = container_of(work, struct bonding, | |
3118 | arp_work.work); | |
ad246c99 | 3119 | bool should_notify_peers = false; |
b2220cad | 3120 | int delta_in_ticks; |
1da177e4 | 3121 | |
b2220cad | 3122 | read_lock(&bond->lock); |
1da177e4 | 3123 | |
b2220cad | 3124 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3125 | |
b2220cad JV |
3126 | if (bond->slave_cnt == 0) |
3127 | goto re_arm; | |
3128 | ||
ad246c99 BH |
3129 | should_notify_peers = bond_should_notify_peers(bond); |
3130 | ||
b2220cad JV |
3131 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3132 | read_unlock(&bond->lock); | |
e6d265e8 JV |
3133 | |
3134 | /* Race avoidance with bond_close flush of workqueue */ | |
3135 | if (!rtnl_trylock()) { | |
3136 | read_lock(&bond->lock); | |
3137 | delta_in_ticks = 1; | |
3138 | should_notify_peers = false; | |
3139 | goto re_arm; | |
3140 | } | |
3141 | ||
b2220cad JV |
3142 | read_lock(&bond->lock); |
3143 | ||
3144 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3145 | ||
3146 | read_unlock(&bond->lock); | |
3147 | rtnl_unlock(); | |
3148 | read_lock(&bond->lock); | |
1da177e4 LT |
3149 | } |
3150 | ||
b2220cad JV |
3151 | bond_ab_arp_probe(bond); |
3152 | ||
1da177e4 | 3153 | re_arm: |
e6d265e8 | 3154 | if (bond->params.arp_interval) |
1b76b316 | 3155 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 3156 | |
1da177e4 | 3157 | read_unlock(&bond->lock); |
ad246c99 BH |
3158 | |
3159 | if (should_notify_peers) { | |
e6d265e8 JV |
3160 | if (!rtnl_trylock()) { |
3161 | read_lock(&bond->lock); | |
3162 | bond->send_peer_notif++; | |
3163 | read_unlock(&bond->lock); | |
3164 | return; | |
3165 | } | |
ad246c99 BH |
3166 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
3167 | rtnl_unlock(); | |
3168 | } | |
1da177e4 LT |
3169 | } |
3170 | ||
1da177e4 LT |
3171 | /*-------------------------- netdev event handling --------------------------*/ |
3172 | ||
3173 | /* | |
3174 | * Change device name | |
3175 | */ | |
3176 | static int bond_event_changename(struct bonding *bond) | |
3177 | { | |
1da177e4 LT |
3178 | bond_remove_proc_entry(bond); |
3179 | bond_create_proc_entry(bond); | |
7e083840 | 3180 | |
f073c7ca TI |
3181 | bond_debug_reregister(bond); |
3182 | ||
1da177e4 LT |
3183 | return NOTIFY_DONE; |
3184 | } | |
3185 | ||
3d632c3f SH |
3186 | static int bond_master_netdev_event(unsigned long event, |
3187 | struct net_device *bond_dev) | |
1da177e4 | 3188 | { |
454d7c9b | 3189 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3190 | |
3191 | switch (event) { | |
3192 | case NETDEV_CHANGENAME: | |
3193 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3194 | default: |
3195 | break; | |
3196 | } | |
3197 | ||
3198 | return NOTIFY_DONE; | |
3199 | } | |
3200 | ||
3d632c3f SH |
3201 | static int bond_slave_netdev_event(unsigned long event, |
3202 | struct net_device *slave_dev) | |
1da177e4 LT |
3203 | { |
3204 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3205 | struct bonding *bond = netdev_priv(bond_dev); |
98f41f69 | 3206 | struct slave *slave = NULL; |
1da177e4 LT |
3207 | |
3208 | switch (event) { | |
3209 | case NETDEV_UNREGISTER: | |
3210 | if (bond_dev) { | |
1284cd3a JV |
3211 | if (bond->setup_by_slave) |
3212 | bond_release_and_destroy(bond_dev, slave_dev); | |
3213 | else | |
3214 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3215 | } |
3216 | break; | |
98f41f69 | 3217 | case NETDEV_UP: |
1da177e4 | 3218 | case NETDEV_CHANGE: |
98f41f69 WP |
3219 | slave = bond_get_slave_by_dev(bond, slave_dev); |
3220 | if (slave) { | |
3221 | u32 old_speed = slave->speed; | |
3222 | u8 old_duplex = slave->duplex; | |
17d04500 | 3223 | |
98f41f69 | 3224 | bond_update_speed_duplex(slave); |
17d04500 | 3225 | |
98f41f69 | 3226 | if (bond->params.mode == BOND_MODE_8023AD) { |
17d04500 JV |
3227 | if (old_speed != slave->speed) |
3228 | bond_3ad_adapter_speed_changed(slave); | |
3229 | if (old_duplex != slave->duplex) | |
3230 | bond_3ad_adapter_duplex_changed(slave); | |
3231 | } | |
3232 | } | |
3233 | ||
1da177e4 LT |
3234 | break; |
3235 | case NETDEV_DOWN: | |
3236 | /* | |
3237 | * ... Or is it this? | |
3238 | */ | |
3239 | break; | |
3240 | case NETDEV_CHANGEMTU: | |
3241 | /* | |
3242 | * TODO: Should slaves be allowed to | |
3243 | * independently alter their MTU? For | |
3244 | * an active-backup bond, slaves need | |
3245 | * not be the same type of device, so | |
3246 | * MTUs may vary. For other modes, | |
3247 | * slaves arguably should have the | |
3248 | * same MTUs. To do this, we'd need to | |
3249 | * take over the slave's change_mtu | |
3250 | * function for the duration of their | |
3251 | * servitude. | |
3252 | */ | |
3253 | break; | |
3254 | case NETDEV_CHANGENAME: | |
3255 | /* | |
3256 | * TODO: handle changing the primary's name | |
3257 | */ | |
3258 | break; | |
8531c5ff AK |
3259 | case NETDEV_FEAT_CHANGE: |
3260 | bond_compute_features(bond); | |
3261 | break; | |
1da177e4 LT |
3262 | default: |
3263 | break; | |
3264 | } | |
3265 | ||
3266 | return NOTIFY_DONE; | |
3267 | } | |
3268 | ||
3269 | /* | |
3270 | * bond_netdev_event: handle netdev notifier chain events. | |
3271 | * | |
3272 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3273 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3274 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3275 | * dev_probe_lock). | |
3276 | */ | |
3d632c3f SH |
3277 | static int bond_netdev_event(struct notifier_block *this, |
3278 | unsigned long event, void *ptr) | |
1da177e4 LT |
3279 | { |
3280 | struct net_device *event_dev = (struct net_device *)ptr; | |
3281 | ||
5a03cdb7 | 3282 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3283 | event_dev ? event_dev->name : "None", |
3284 | event); | |
1da177e4 | 3285 | |
0b680e75 JV |
3286 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3287 | return NOTIFY_DONE; | |
3288 | ||
1da177e4 | 3289 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3290 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3291 | return bond_master_netdev_event(event, event_dev); |
3292 | } | |
3293 | ||
3294 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3295 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3296 | return bond_slave_netdev_event(event, event_dev); |
3297 | } | |
3298 | ||
3299 | return NOTIFY_DONE; | |
3300 | } | |
3301 | ||
c3ade5ca JV |
3302 | /* |
3303 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3304 | * | |
3305 | * We keep track of device IPs primarily to use as source addresses in | |
3306 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3307 | * | |
3308 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3309 | */ | |
3310 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3311 | { | |
3312 | struct in_ifaddr *ifa = ptr; | |
3313 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3314 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3315 | struct bonding *bond; |
3316 | struct vlan_entry *vlan; | |
c3ade5ca | 3317 | |
917fbdb3 HSP |
3318 | /* we only care about primary address */ |
3319 | if(ifa->ifa_flags & IFA_F_SECONDARY) | |
3320 | return NOTIFY_DONE; | |
3321 | ||
ec87fd3b | 3322 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3323 | if (bond->dev == event_dev) { |
3324 | switch (event) { | |
3325 | case NETDEV_UP: | |
3326 | bond->master_ip = ifa->ifa_local; | |
3327 | return NOTIFY_OK; | |
3328 | case NETDEV_DOWN: | |
917fbdb3 | 3329 | bond->master_ip = 0; |
c3ade5ca JV |
3330 | return NOTIFY_OK; |
3331 | default: | |
3332 | return NOTIFY_DONE; | |
3333 | } | |
3334 | } | |
3335 | ||
0883beca | 3336 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
3337 | vlan_dev = __vlan_find_dev_deep(bond->dev, |
3338 | vlan->vlan_id); | |
c3ade5ca JV |
3339 | if (vlan_dev == event_dev) { |
3340 | switch (event) { | |
3341 | case NETDEV_UP: | |
3342 | vlan->vlan_ip = ifa->ifa_local; | |
3343 | return NOTIFY_OK; | |
3344 | case NETDEV_DOWN: | |
917fbdb3 | 3345 | vlan->vlan_ip = 0; |
c3ade5ca JV |
3346 | return NOTIFY_OK; |
3347 | default: | |
3348 | return NOTIFY_DONE; | |
3349 | } | |
3350 | } | |
3351 | } | |
3352 | } | |
3353 | return NOTIFY_DONE; | |
3354 | } | |
3355 | ||
1da177e4 LT |
3356 | static struct notifier_block bond_netdev_notifier = { |
3357 | .notifier_call = bond_netdev_event, | |
3358 | }; | |
3359 | ||
c3ade5ca JV |
3360 | static struct notifier_block bond_inetaddr_notifier = { |
3361 | .notifier_call = bond_inetaddr_event, | |
3362 | }; | |
3363 | ||
169a3e66 JV |
3364 | /*---------------------------- Hashing Policies -----------------------------*/ |
3365 | ||
6f6652be JV |
3366 | /* |
3367 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3368 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3369 | */ | |
a361c83c | 3370 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3371 | { |
3372 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3373 | struct iphdr *iph = ip_hdr(skb); | |
3374 | ||
f14c4e4e | 3375 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3376 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3377 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3378 | } |
3379 | ||
d3da6831 | 3380 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3381 | } |
3382 | ||
169a3e66 | 3383 | /* |
59c51591 | 3384 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3385 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3386 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3387 | */ | |
a361c83c | 3388 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3389 | { |
3390 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3391 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3392 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3393 | int layer4_xor = 0; |
3394 | ||
f14c4e4e | 3395 | if (skb->protocol == htons(ETH_P_IP)) { |
56f8a75c | 3396 | if (!ip_is_fragment(iph) && |
169a3e66 JV |
3397 | (iph->protocol == IPPROTO_TCP || |
3398 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3399 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3400 | } |
3401 | return (layer4_xor ^ | |
3402 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3403 | ||
3404 | } | |
3405 | ||
d3da6831 | 3406 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3407 | } |
3408 | ||
3409 | /* | |
3410 | * Hash for the output device based upon layer 2 data | |
3411 | */ | |
a361c83c | 3412 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3413 | { |
3414 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3415 | ||
d3da6831 | 3416 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3417 | } |
3418 | ||
1da177e4 LT |
3419 | /*-------------------------- Device entry points ----------------------------*/ |
3420 | ||
3421 | static int bond_open(struct net_device *bond_dev) | |
3422 | { | |
454d7c9b | 3423 | struct bonding *bond = netdev_priv(bond_dev); |
ba3211cc PP |
3424 | struct slave *slave; |
3425 | int i; | |
1da177e4 | 3426 | |
ba3211cc PP |
3427 | /* reset slave->backup and slave->inactive */ |
3428 | read_lock(&bond->lock); | |
3429 | if (bond->slave_cnt > 0) { | |
3430 | read_lock(&bond->curr_slave_lock); | |
3431 | bond_for_each_slave(bond, slave, i) { | |
3432 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3433 | && (slave != bond->curr_active_slave)) { | |
3434 | bond_set_slave_inactive_flags(slave); | |
3435 | } else { | |
3436 | bond_set_slave_active_flags(slave); | |
3437 | } | |
3438 | } | |
3439 | read_unlock(&bond->curr_slave_lock); | |
3440 | } | |
3441 | read_unlock(&bond->lock); | |
3442 | ||
5a37e8ca FL |
3443 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3444 | ||
58402054 | 3445 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3446 | /* bond_alb_initialize must be called before the timer |
3447 | * is started. | |
3448 | */ | |
3449 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3450 | /* something went wrong - fail the open operation */ | |
b473946a | 3451 | return -ENOMEM; |
1da177e4 LT |
3452 | } |
3453 | ||
1b76b316 JV |
3454 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3455 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3456 | } |
3457 | ||
3458 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3459 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3460 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3461 | } |
3462 | ||
3463 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3464 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3465 | INIT_DELAYED_WORK(&bond->arp_work, | |
3466 | bond_activebackup_arp_mon); | |
3467 | else | |
3468 | INIT_DELAYED_WORK(&bond->arp_work, | |
3469 | bond_loadbalance_arp_mon); | |
3470 | ||
3471 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3472 | if (bond->params.arp_validate) |
3aba891d | 3473 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3474 | } |
3475 | ||
3476 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3477 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3478 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3479 | /* register to receive LACPDUs */ |
3aba891d | 3480 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3481 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3482 | } |
3483 | ||
3484 | return 0; | |
3485 | } | |
3486 | ||
3487 | static int bond_close(struct net_device *bond_dev) | |
3488 | { | |
454d7c9b | 3489 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3490 | |
1da177e4 LT |
3491 | write_lock_bh(&bond->lock); |
3492 | ||
ad246c99 BH |
3493 | bond->send_peer_notif = 0; |
3494 | ||
1da177e4 LT |
3495 | write_unlock_bh(&bond->lock); |
3496 | ||
1da177e4 | 3497 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
e6d265e8 | 3498 | cancel_delayed_work_sync(&bond->mii_work); |
1da177e4 LT |
3499 | } |
3500 | ||
3501 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
e6d265e8 | 3502 | cancel_delayed_work_sync(&bond->arp_work); |
1da177e4 LT |
3503 | } |
3504 | ||
3505 | switch (bond->params.mode) { | |
3506 | case BOND_MODE_8023AD: | |
e6d265e8 | 3507 | cancel_delayed_work_sync(&bond->ad_work); |
1da177e4 LT |
3508 | break; |
3509 | case BOND_MODE_TLB: | |
3510 | case BOND_MODE_ALB: | |
e6d265e8 | 3511 | cancel_delayed_work_sync(&bond->alb_work); |
1da177e4 LT |
3512 | break; |
3513 | default: | |
3514 | break; | |
3515 | } | |
3516 | ||
5a37e8ca | 3517 | if (delayed_work_pending(&bond->mcast_work)) |
e6d265e8 | 3518 | cancel_delayed_work_sync(&bond->mcast_work); |
1da177e4 | 3519 | |
58402054 | 3520 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3521 | /* Must be called only after all |
3522 | * slaves have been released | |
3523 | */ | |
3524 | bond_alb_deinitialize(bond); | |
3525 | } | |
3aba891d | 3526 | bond->recv_probe = NULL; |
1da177e4 LT |
3527 | |
3528 | return 0; | |
3529 | } | |
3530 | ||
28172739 ED |
3531 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3532 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3533 | { |
454d7c9b | 3534 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3535 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3536 | struct slave *slave; |
3537 | int i; | |
3538 | ||
28172739 | 3539 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3540 | |
3541 | read_lock_bh(&bond->lock); | |
3542 | ||
3543 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3544 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3545 | dev_get_stats(slave->dev, &temp); |
3546 | ||
3547 | stats->rx_packets += sstats->rx_packets; | |
3548 | stats->rx_bytes += sstats->rx_bytes; | |
3549 | stats->rx_errors += sstats->rx_errors; | |
3550 | stats->rx_dropped += sstats->rx_dropped; | |
3551 | ||
3552 | stats->tx_packets += sstats->tx_packets; | |
3553 | stats->tx_bytes += sstats->tx_bytes; | |
3554 | stats->tx_errors += sstats->tx_errors; | |
3555 | stats->tx_dropped += sstats->tx_dropped; | |
3556 | ||
3557 | stats->multicast += sstats->multicast; | |
3558 | stats->collisions += sstats->collisions; | |
3559 | ||
3560 | stats->rx_length_errors += sstats->rx_length_errors; | |
3561 | stats->rx_over_errors += sstats->rx_over_errors; | |
3562 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3563 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3564 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3565 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3566 | ||
3567 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3568 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3569 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3570 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3571 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3572 | } |
3573 | ||
1da177e4 LT |
3574 | read_unlock_bh(&bond->lock); |
3575 | ||
3576 | return stats; | |
3577 | } | |
3578 | ||
3579 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3580 | { | |
3581 | struct net_device *slave_dev = NULL; | |
3582 | struct ifbond k_binfo; | |
3583 | struct ifbond __user *u_binfo = NULL; | |
3584 | struct ifslave k_sinfo; | |
3585 | struct ifslave __user *u_sinfo = NULL; | |
3586 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3587 | int res = 0; |
3588 | ||
a4aee5c8 | 3589 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3590 | |
3591 | switch (cmd) { | |
1da177e4 LT |
3592 | case SIOCGMIIPHY: |
3593 | mii = if_mii(ifr); | |
3d632c3f | 3594 | if (!mii) |
1da177e4 | 3595 | return -EINVAL; |
3d632c3f | 3596 | |
1da177e4 LT |
3597 | mii->phy_id = 0; |
3598 | /* Fall Through */ | |
3599 | case SIOCGMIIREG: | |
3600 | /* | |
3601 | * We do this again just in case we were called by SIOCGMIIREG | |
3602 | * instead of SIOCGMIIPHY. | |
3603 | */ | |
3604 | mii = if_mii(ifr); | |
3d632c3f | 3605 | if (!mii) |
1da177e4 | 3606 | return -EINVAL; |
3d632c3f | 3607 | |
1da177e4 LT |
3608 | |
3609 | if (mii->reg_num == 1) { | |
454d7c9b | 3610 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3611 | mii->val_out = 0; |
6603a6f2 | 3612 | read_lock(&bond->lock); |
1da177e4 | 3613 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3614 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3615 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3616 | |
1da177e4 | 3617 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3618 | read_unlock(&bond->lock); |
1da177e4 LT |
3619 | } |
3620 | ||
3621 | return 0; | |
3622 | case BOND_INFO_QUERY_OLD: | |
3623 | case SIOCBONDINFOQUERY: | |
3624 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3625 | ||
3d632c3f | 3626 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3627 | return -EFAULT; |
1da177e4 LT |
3628 | |
3629 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3630 | if (res == 0 && |
3631 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3632 | return -EFAULT; | |
1da177e4 LT |
3633 | |
3634 | return res; | |
3635 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3636 | case SIOCBONDSLAVEINFOQUERY: | |
3637 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3638 | ||
3d632c3f | 3639 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3640 | return -EFAULT; |
1da177e4 LT |
3641 | |
3642 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3643 | if (res == 0 && |
3644 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3645 | return -EFAULT; | |
1da177e4 LT |
3646 | |
3647 | return res; | |
3648 | default: | |
3649 | /* Go on */ | |
3650 | break; | |
3651 | } | |
3652 | ||
3d632c3f | 3653 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3654 | return -EPERM; |
1da177e4 | 3655 | |
ec87fd3b | 3656 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3657 | |
a4aee5c8 | 3658 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3659 | |
3d632c3f | 3660 | if (!slave_dev) |
1da177e4 | 3661 | res = -ENODEV; |
3d632c3f | 3662 | else { |
a4aee5c8 | 3663 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3664 | switch (cmd) { |
3665 | case BOND_ENSLAVE_OLD: | |
3666 | case SIOCBONDENSLAVE: | |
3667 | res = bond_enslave(bond_dev, slave_dev); | |
3668 | break; | |
3669 | case BOND_RELEASE_OLD: | |
3670 | case SIOCBONDRELEASE: | |
3671 | res = bond_release(bond_dev, slave_dev); | |
3672 | break; | |
3673 | case BOND_SETHWADDR_OLD: | |
3674 | case SIOCBONDSETHWADDR: | |
3675 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3676 | break; | |
3677 | case BOND_CHANGE_ACTIVE_OLD: | |
3678 | case SIOCBONDCHANGEACTIVE: | |
3679 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3680 | break; | |
3681 | default: | |
3682 | res = -EOPNOTSUPP; | |
3683 | } | |
3684 | ||
3685 | dev_put(slave_dev); | |
3686 | } | |
3687 | ||
1da177e4 LT |
3688 | return res; |
3689 | } | |
3690 | ||
22bedad3 JP |
3691 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3692 | struct netdev_hw_addr_list *list, | |
3693 | int addrlen) | |
3694 | { | |
3695 | struct netdev_hw_addr *ha; | |
3696 | ||
3697 | netdev_hw_addr_list_for_each(ha, list) | |
3698 | if (!memcmp(ha->addr, addr, addrlen)) | |
3699 | return true; | |
3700 | ||
3701 | return false; | |
3702 | } | |
3703 | ||
d03462b9 | 3704 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3705 | { |
454d7c9b | 3706 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3707 | |
d03462b9 JP |
3708 | if (change & IFF_PROMISC) |
3709 | bond_set_promiscuity(bond, | |
3710 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3711 | |
d03462b9 JP |
3712 | if (change & IFF_ALLMULTI) |
3713 | bond_set_allmulti(bond, | |
3714 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3715 | } | |
1da177e4 | 3716 | |
d03462b9 JP |
3717 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3718 | { | |
3719 | struct bonding *bond = netdev_priv(bond_dev); | |
3720 | struct netdev_hw_addr *ha; | |
3721 | bool found; | |
1da177e4 | 3722 | |
80ee5ad2 JV |
3723 | read_lock(&bond->lock); |
3724 | ||
1da177e4 | 3725 | /* looking for addresses to add to slaves' mc list */ |
22bedad3 JP |
3726 | netdev_for_each_mc_addr(ha, bond_dev) { |
3727 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3728 | bond_dev->addr_len); | |
3729 | if (!found) | |
3730 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3731 | } |
3732 | ||
3733 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3734 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3735 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3736 | bond_dev->addr_len); | |
3737 | if (!found) | |
3738 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3739 | } |
3740 | ||
3741 | /* save master's multicast list */ | |
22bedad3 JP |
3742 | __hw_addr_flush(&bond->mc_list); |
3743 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3744 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3745 | |
80ee5ad2 | 3746 | read_unlock(&bond->lock); |
1da177e4 LT |
3747 | } |
3748 | ||
00829823 SH |
3749 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3750 | { | |
3751 | struct bonding *bond = netdev_priv(dev); | |
3752 | struct slave *slave = bond->first_slave; | |
3753 | ||
3754 | if (slave) { | |
3755 | const struct net_device_ops *slave_ops | |
3756 | = slave->dev->netdev_ops; | |
3757 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3758 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3759 | } |
3760 | return 0; | |
3761 | } | |
3762 | ||
1da177e4 LT |
3763 | /* |
3764 | * Change the MTU of all of a master's slaves to match the master | |
3765 | */ | |
3766 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3767 | { | |
454d7c9b | 3768 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3769 | struct slave *slave, *stop_at; |
3770 | int res = 0; | |
3771 | int i; | |
3772 | ||
5a03cdb7 | 3773 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3774 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3775 | |
3776 | /* Can't hold bond->lock with bh disabled here since | |
3777 | * some base drivers panic. On the other hand we can't | |
3778 | * hold bond->lock without bh disabled because we'll | |
3779 | * deadlock. The only solution is to rely on the fact | |
3780 | * that we're under rtnl_lock here, and the slaves | |
3781 | * list won't change. This doesn't solve the problem | |
3782 | * of setting the slave's MTU while it is | |
3783 | * transmitting, but the assumption is that the base | |
3784 | * driver can handle that. | |
3785 | * | |
3786 | * TODO: figure out a way to safely iterate the slaves | |
3787 | * list, but without holding a lock around the actual | |
3788 | * call to the base driver. | |
3789 | */ | |
3790 | ||
3791 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3792 | pr_debug("s %p s->p %p c_m %p\n", |
3793 | slave, | |
3794 | slave->prev, | |
3795 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3796 | |
1da177e4 LT |
3797 | res = dev_set_mtu(slave->dev, new_mtu); |
3798 | ||
3799 | if (res) { | |
3800 | /* If we failed to set the slave's mtu to the new value | |
3801 | * we must abort the operation even in ACTIVE_BACKUP | |
3802 | * mode, because if we allow the backup slaves to have | |
3803 | * different mtu values than the active slave we'll | |
3804 | * need to change their mtu when doing a failover. That | |
3805 | * means changing their mtu from timer context, which | |
3806 | * is probably not a good idea. | |
3807 | */ | |
5a03cdb7 | 3808 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3809 | goto unwind; |
3810 | } | |
3811 | } | |
3812 | ||
3813 | bond_dev->mtu = new_mtu; | |
3814 | ||
3815 | return 0; | |
3816 | ||
3817 | unwind: | |
3818 | /* unwind from head to the slave that failed */ | |
3819 | stop_at = slave; | |
3820 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3821 | int tmp_res; | |
3822 | ||
3823 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3824 | if (tmp_res) { | |
a4aee5c8 JP |
3825 | pr_debug("unwind err %d dev %s\n", |
3826 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3827 | } |
3828 | } | |
3829 | ||
3830 | return res; | |
3831 | } | |
3832 | ||
3833 | /* | |
3834 | * Change HW address | |
3835 | * | |
3836 | * Note that many devices must be down to change the HW address, and | |
3837 | * downing the master releases all slaves. We can make bonds full of | |
3838 | * bonding devices to test this, however. | |
3839 | */ | |
3840 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3841 | { | |
454d7c9b | 3842 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3843 | struct sockaddr *sa = addr, tmp_sa; |
3844 | struct slave *slave, *stop_at; | |
3845 | int res = 0; | |
3846 | int i; | |
3847 | ||
eb7cc59a SH |
3848 | if (bond->params.mode == BOND_MODE_ALB) |
3849 | return bond_alb_set_mac_address(bond_dev, addr); | |
3850 | ||
3851 | ||
a4aee5c8 JP |
3852 | pr_debug("bond=%p, name=%s\n", |
3853 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3854 | |
dd957c57 | 3855 | /* |
3915c1e8 JV |
3856 | * If fail_over_mac is set to active, do nothing and return |
3857 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3858 | */ |
3915c1e8 | 3859 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3860 | return 0; |
2ab82852 | 3861 | |
3d632c3f | 3862 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3863 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3864 | |
3865 | /* Can't hold bond->lock with bh disabled here since | |
3866 | * some base drivers panic. On the other hand we can't | |
3867 | * hold bond->lock without bh disabled because we'll | |
3868 | * deadlock. The only solution is to rely on the fact | |
3869 | * that we're under rtnl_lock here, and the slaves | |
3870 | * list won't change. This doesn't solve the problem | |
3871 | * of setting the slave's hw address while it is | |
3872 | * transmitting, but the assumption is that the base | |
3873 | * driver can handle that. | |
3874 | * | |
3875 | * TODO: figure out a way to safely iterate the slaves | |
3876 | * list, but without holding a lock around the actual | |
3877 | * call to the base driver. | |
3878 | */ | |
3879 | ||
3880 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3881 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3882 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3883 | |
eb7cc59a | 3884 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3885 | res = -EOPNOTSUPP; |
5a03cdb7 | 3886 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3887 | goto unwind; |
3888 | } | |
3889 | ||
3890 | res = dev_set_mac_address(slave->dev, addr); | |
3891 | if (res) { | |
3892 | /* TODO: consider downing the slave | |
3893 | * and retry ? | |
3894 | * User should expect communications | |
3895 | * breakage anyway until ARP finish | |
3896 | * updating, so... | |
3897 | */ | |
5a03cdb7 | 3898 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3899 | goto unwind; |
3900 | } | |
3901 | } | |
3902 | ||
3903 | /* success */ | |
3904 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3905 | return 0; | |
3906 | ||
3907 | unwind: | |
3908 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3909 | tmp_sa.sa_family = bond_dev->type; | |
3910 | ||
3911 | /* unwind from head to the slave that failed */ | |
3912 | stop_at = slave; | |
3913 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3914 | int tmp_res; | |
3915 | ||
3916 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3917 | if (tmp_res) { | |
a4aee5c8 JP |
3918 | pr_debug("unwind err %d dev %s\n", |
3919 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3920 | } |
3921 | } | |
3922 | ||
3923 | return res; | |
3924 | } | |
3925 | ||
3926 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3927 | { | |
454d7c9b | 3928 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3929 | struct slave *slave, *start_at; |
cf5f9044 | 3930 | int i, slave_no, res = 1; |
a2fd940f | 3931 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3932 | |
cf5f9044 | 3933 | /* |
a2fd940f AG |
3934 | * Start with the curr_active_slave that joined the bond as the |
3935 | * default for sending IGMP traffic. For failover purposes one | |
3936 | * needs to maintain some consistency for the interface that will | |
3937 | * send the join/membership reports. The curr_active_slave found | |
3938 | * will send all of this type of traffic. | |
cf5f9044 | 3939 | */ |
00ae7028 | 3940 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3941 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3942 | |
a2fd940f AG |
3943 | read_lock(&bond->curr_slave_lock); |
3944 | slave = bond->curr_active_slave; | |
3945 | read_unlock(&bond->curr_slave_lock); | |
3946 | ||
3947 | if (!slave) | |
3948 | goto out; | |
3949 | } else { | |
3950 | /* | |
3951 | * Concurrent TX may collide on rr_tx_counter; we accept | |
3952 | * that as being rare enough not to justify using an | |
3953 | * atomic op here. | |
3954 | */ | |
3955 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
3956 | ||
3957 | bond_for_each_slave(bond, slave, i) { | |
3958 | slave_no--; | |
3959 | if (slave_no < 0) | |
3960 | break; | |
3961 | } | |
1da177e4 LT |
3962 | } |
3963 | ||
cf5f9044 | 3964 | start_at = slave; |
1da177e4 LT |
3965 | bond_for_each_slave_from(bond, slave, i, start_at) { |
3966 | if (IS_UP(slave->dev) && | |
3967 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 3968 | bond_is_active_slave(slave)) { |
1da177e4 | 3969 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
3970 | break; |
3971 | } | |
3972 | } | |
3973 | ||
1da177e4 LT |
3974 | out: |
3975 | if (res) { | |
3976 | /* no suitable interface, frame not sent */ | |
3977 | dev_kfree_skb(skb); | |
3978 | } | |
0693e88e | 3979 | |
ec634fe3 | 3980 | return NETDEV_TX_OK; |
1da177e4 LT |
3981 | } |
3982 | ||
075897ce | 3983 | |
1da177e4 LT |
3984 | /* |
3985 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3986 | * the bond has a usable interface. | |
3987 | */ | |
3988 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3989 | { | |
454d7c9b | 3990 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3991 | int res = 1; |
3992 | ||
1da177e4 LT |
3993 | read_lock(&bond->curr_slave_lock); |
3994 | ||
0693e88e MM |
3995 | if (bond->curr_active_slave) |
3996 | res = bond_dev_queue_xmit(bond, skb, | |
3997 | bond->curr_active_slave->dev); | |
1da177e4 | 3998 | |
3d632c3f | 3999 | if (res) |
1da177e4 LT |
4000 | /* no suitable interface, frame not sent */ |
4001 | dev_kfree_skb(skb); | |
3d632c3f | 4002 | |
1da177e4 | 4003 | read_unlock(&bond->curr_slave_lock); |
0693e88e | 4004 | |
ec634fe3 | 4005 | return NETDEV_TX_OK; |
1da177e4 LT |
4006 | } |
4007 | ||
4008 | /* | |
169a3e66 JV |
4009 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4010 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4011 | * find the next active slave. | |
1da177e4 LT |
4012 | */ |
4013 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4014 | { | |
454d7c9b | 4015 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4016 | struct slave *slave, *start_at; |
4017 | int slave_no; | |
4018 | int i; | |
4019 | int res = 1; | |
4020 | ||
a361c83c | 4021 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4022 | |
4023 | bond_for_each_slave(bond, slave, i) { | |
4024 | slave_no--; | |
3d632c3f | 4025 | if (slave_no < 0) |
1da177e4 | 4026 | break; |
1da177e4 LT |
4027 | } |
4028 | ||
4029 | start_at = slave; | |
4030 | ||
4031 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4032 | if (IS_UP(slave->dev) && | |
4033 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4034 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4035 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4036 | break; | |
4037 | } | |
4038 | } | |
4039 | ||
1da177e4 LT |
4040 | if (res) { |
4041 | /* no suitable interface, frame not sent */ | |
4042 | dev_kfree_skb(skb); | |
4043 | } | |
0693e88e | 4044 | |
ec634fe3 | 4045 | return NETDEV_TX_OK; |
1da177e4 LT |
4046 | } |
4047 | ||
4048 | /* | |
4049 | * in broadcast mode, we send everything to all usable interfaces. | |
4050 | */ | |
4051 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4052 | { | |
454d7c9b | 4053 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4054 | struct slave *slave, *start_at; |
4055 | struct net_device *tx_dev = NULL; | |
4056 | int i; | |
4057 | int res = 1; | |
4058 | ||
1da177e4 LT |
4059 | read_lock(&bond->curr_slave_lock); |
4060 | start_at = bond->curr_active_slave; | |
4061 | read_unlock(&bond->curr_slave_lock); | |
4062 | ||
3d632c3f | 4063 | if (!start_at) |
1da177e4 | 4064 | goto out; |
1da177e4 LT |
4065 | |
4066 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4067 | if (IS_UP(slave->dev) && | |
4068 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4069 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4070 | if (tx_dev) { |
4071 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4072 | if (!skb2) { | |
a4aee5c8 | 4073 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4074 | bond_dev->name); |
1da177e4 LT |
4075 | continue; |
4076 | } | |
4077 | ||
4078 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4079 | if (res) { | |
4080 | dev_kfree_skb(skb2); | |
4081 | continue; | |
4082 | } | |
4083 | } | |
4084 | tx_dev = slave->dev; | |
4085 | } | |
4086 | } | |
4087 | ||
3d632c3f | 4088 | if (tx_dev) |
1da177e4 | 4089 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4090 | |
4091 | out: | |
3d632c3f | 4092 | if (res) |
1da177e4 LT |
4093 | /* no suitable interface, frame not sent */ |
4094 | dev_kfree_skb(skb); | |
3d632c3f | 4095 | |
1da177e4 | 4096 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4097 | return NETDEV_TX_OK; |
1da177e4 LT |
4098 | } |
4099 | ||
4100 | /*------------------------- Device initialization ---------------------------*/ | |
4101 | ||
6f6652be JV |
4102 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4103 | { | |
4104 | switch (bond->params.xmit_policy) { | |
4105 | case BOND_XMIT_POLICY_LAYER23: | |
4106 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4107 | break; | |
4108 | case BOND_XMIT_POLICY_LAYER34: | |
4109 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4110 | break; | |
4111 | case BOND_XMIT_POLICY_LAYER2: | |
4112 | default: | |
4113 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4114 | break; | |
4115 | } | |
4116 | } | |
4117 | ||
bb1d9123 AG |
4118 | /* |
4119 | * Lookup the slave that corresponds to a qid | |
4120 | */ | |
4121 | static inline int bond_slave_override(struct bonding *bond, | |
4122 | struct sk_buff *skb) | |
4123 | { | |
4124 | int i, res = 1; | |
4125 | struct slave *slave = NULL; | |
4126 | struct slave *check_slave; | |
4127 | ||
0693e88e MM |
4128 | if (!skb->queue_mapping) |
4129 | return 1; | |
bb1d9123 AG |
4130 | |
4131 | /* Find out if any slaves have the same mapping as this skb. */ | |
4132 | bond_for_each_slave(bond, check_slave, i) { | |
4133 | if (check_slave->queue_id == skb->queue_mapping) { | |
4134 | slave = check_slave; | |
4135 | break; | |
4136 | } | |
4137 | } | |
4138 | ||
4139 | /* If the slave isn't UP, use default transmit policy. */ | |
4140 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4141 | (slave->link == BOND_LINK_UP)) { | |
4142 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4143 | } | |
4144 | ||
bb1d9123 AG |
4145 | return res; |
4146 | } | |
4147 | ||
374eeb5a | 4148 | |
bb1d9123 AG |
4149 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4150 | { | |
4151 | /* | |
4152 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4153 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4154 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4155 | * way down to the bonding driver. | |
4156 | */ | |
fd0e435b PO |
4157 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4158 | ||
374eeb5a NH |
4159 | /* |
4160 | * Save the original txq to restore before passing to the driver | |
4161 | */ | |
4162 | bond_queue_mapping(skb) = skb->queue_mapping; | |
4163 | ||
fd0e435b | 4164 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4165 | do { |
fd0e435b | 4166 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4167 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4168 | } |
4169 | return txq; | |
bb1d9123 AG |
4170 | } |
4171 | ||
0693e88e | 4172 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4173 | { |
bb1d9123 AG |
4174 | struct bonding *bond = netdev_priv(dev); |
4175 | ||
4176 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4177 | if (!bond_slave_override(bond, skb)) | |
4178 | return NETDEV_TX_OK; | |
4179 | } | |
00829823 SH |
4180 | |
4181 | switch (bond->params.mode) { | |
4182 | case BOND_MODE_ROUNDROBIN: | |
4183 | return bond_xmit_roundrobin(skb, dev); | |
4184 | case BOND_MODE_ACTIVEBACKUP: | |
4185 | return bond_xmit_activebackup(skb, dev); | |
4186 | case BOND_MODE_XOR: | |
4187 | return bond_xmit_xor(skb, dev); | |
4188 | case BOND_MODE_BROADCAST: | |
4189 | return bond_xmit_broadcast(skb, dev); | |
4190 | case BOND_MODE_8023AD: | |
4191 | return bond_3ad_xmit_xor(skb, dev); | |
4192 | case BOND_MODE_ALB: | |
4193 | case BOND_MODE_TLB: | |
4194 | return bond_alb_xmit(skb, dev); | |
4195 | default: | |
4196 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4197 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4198 | dev->name, bond->params.mode); | |
00829823 SH |
4199 | WARN_ON_ONCE(1); |
4200 | dev_kfree_skb(skb); | |
4201 | return NETDEV_TX_OK; | |
4202 | } | |
4203 | } | |
4204 | ||
0693e88e MM |
4205 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4206 | { | |
4207 | struct bonding *bond = netdev_priv(dev); | |
4208 | netdev_tx_t ret = NETDEV_TX_OK; | |
4209 | ||
4210 | /* | |
4211 | * If we risk deadlock from transmitting this in the | |
4212 | * netpoll path, tell netpoll to queue the frame for later tx | |
4213 | */ | |
4214 | if (is_netpoll_tx_blocked(dev)) | |
4215 | return NETDEV_TX_BUSY; | |
4216 | ||
4217 | read_lock(&bond->lock); | |
4218 | ||
4219 | if (bond->slave_cnt) | |
4220 | ret = __bond_start_xmit(skb, dev); | |
4221 | else | |
4222 | dev_kfree_skb(skb); | |
4223 | ||
4224 | read_unlock(&bond->lock); | |
4225 | ||
4226 | return ret; | |
4227 | } | |
00829823 | 4228 | |
1da177e4 LT |
4229 | /* |
4230 | * set bond mode specific net device operations | |
4231 | */ | |
a77b5325 | 4232 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4233 | { |
169a3e66 JV |
4234 | struct net_device *bond_dev = bond->dev; |
4235 | ||
1da177e4 LT |
4236 | switch (mode) { |
4237 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4238 | break; |
4239 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4240 | break; |
4241 | case BOND_MODE_XOR: | |
6f6652be | 4242 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4243 | break; |
4244 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4245 | break; |
4246 | case BOND_MODE_8023AD: | |
6f6652be | 4247 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4248 | break; |
1da177e4 | 4249 | case BOND_MODE_ALB: |
8f903c70 JV |
4250 | /* FALLTHRU */ |
4251 | case BOND_MODE_TLB: | |
1da177e4 LT |
4252 | break; |
4253 | default: | |
4254 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4255 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4256 | bond_dev->name, mode); | |
1da177e4 LT |
4257 | break; |
4258 | } | |
4259 | } | |
4260 | ||
217df670 JV |
4261 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4262 | struct ethtool_drvinfo *drvinfo) | |
4263 | { | |
4264 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4265 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4266 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4267 | } | |
4268 | ||
7282d491 | 4269 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4270 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac | 4271 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4272 | }; |
4273 | ||
eb7cc59a | 4274 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4275 | .ndo_init = bond_init, |
9e71626c | 4276 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4277 | .ndo_open = bond_open, |
4278 | .ndo_stop = bond_close, | |
00829823 | 4279 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4280 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4281 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 4282 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 4283 | .ndo_change_rx_flags = bond_change_rx_flags, |
afc4b13d | 4284 | .ndo_set_rx_mode = bond_set_multicast_list, |
eb7cc59a | 4285 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 4286 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4287 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 4288 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 4289 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 4290 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4291 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4292 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4293 | .ndo_poll_controller = bond_poll_controller, | |
4294 | #endif | |
9232ecca JP |
4295 | .ndo_add_slave = bond_enslave, |
4296 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4297 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4298 | }; |
4299 | ||
9e2e61fb AW |
4300 | static void bond_destructor(struct net_device *bond_dev) |
4301 | { | |
4302 | struct bonding *bond = netdev_priv(bond_dev); | |
4303 | if (bond->wq) | |
4304 | destroy_workqueue(bond->wq); | |
4305 | free_netdev(bond_dev); | |
4306 | } | |
4307 | ||
181470fc | 4308 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4309 | { |
454d7c9b | 4310 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4311 | |
1da177e4 LT |
4312 | /* initialize rwlocks */ |
4313 | rwlock_init(&bond->lock); | |
4314 | rwlock_init(&bond->curr_slave_lock); | |
4315 | ||
d2991f75 | 4316 | bond->params = bonding_defaults; |
1da177e4 LT |
4317 | |
4318 | /* Initialize pointers */ | |
1da177e4 LT |
4319 | bond->dev = bond_dev; |
4320 | INIT_LIST_HEAD(&bond->vlan_list); | |
4321 | ||
4322 | /* Initialize the device entry points */ | |
181470fc | 4323 | ether_setup(bond_dev); |
eb7cc59a | 4324 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4325 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4326 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4327 | |
9e2e61fb | 4328 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4329 | |
4330 | /* Initialize the device options */ | |
4331 | bond_dev->tx_queue_len = 0; | |
4332 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4333 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 4334 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 4335 | |
1da177e4 LT |
4336 | /* At first, we block adding VLANs. That's the only way to |
4337 | * prevent problems that occur when adding VLANs over an | |
4338 | * empty bond. The block will be removed once non-challenged | |
4339 | * slaves are enslaved. | |
4340 | */ | |
4341 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4342 | ||
932ff279 | 4343 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4344 | * transmitting */ |
4345 | bond_dev->features |= NETIF_F_LLTX; | |
4346 | ||
4347 | /* By default, we declare the bond to be fully | |
4348 | * VLAN hardware accelerated capable. Special | |
4349 | * care is taken in the various xmit functions | |
4350 | * when there are slaves that are not hw accel | |
4351 | * capable | |
4352 | */ | |
1da177e4 | 4353 | |
b2a103e6 MM |
4354 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
4355 | NETIF_F_HW_VLAN_TX | | |
4356 | NETIF_F_HW_VLAN_RX | | |
4357 | NETIF_F_HW_VLAN_FILTER; | |
4358 | ||
34324dc2 | 4359 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
b2a103e6 | 4360 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
4361 | } |
4362 | ||
fdaea7a9 JV |
4363 | static void bond_work_cancel_all(struct bonding *bond) |
4364 | { | |
fdaea7a9 | 4365 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) |
e6d265e8 | 4366 | cancel_delayed_work_sync(&bond->mii_work); |
fdaea7a9 JV |
4367 | |
4368 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
e6d265e8 | 4369 | cancel_delayed_work_sync(&bond->arp_work); |
fdaea7a9 JV |
4370 | |
4371 | if (bond->params.mode == BOND_MODE_ALB && | |
4372 | delayed_work_pending(&bond->alb_work)) | |
e6d265e8 | 4373 | cancel_delayed_work_sync(&bond->alb_work); |
fdaea7a9 JV |
4374 | |
4375 | if (bond->params.mode == BOND_MODE_8023AD && | |
4376 | delayed_work_pending(&bond->ad_work)) | |
e6d265e8 | 4377 | cancel_delayed_work_sync(&bond->ad_work); |
5a37e8ca FL |
4378 | |
4379 | if (delayed_work_pending(&bond->mcast_work)) | |
e6d265e8 | 4380 | cancel_delayed_work_sync(&bond->mcast_work); |
fdaea7a9 JV |
4381 | } |
4382 | ||
c67dfb29 EB |
4383 | /* |
4384 | * Destroy a bonding device. | |
4385 | * Must be under rtnl_lock when this function is called. | |
4386 | */ | |
4387 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4388 | { |
454d7c9b | 4389 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4390 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4391 | |
f6dc31a8 WC |
4392 | bond_netpoll_cleanup(bond_dev); |
4393 | ||
c67dfb29 EB |
4394 | /* Release the bonded slaves */ |
4395 | bond_release_all(bond_dev); | |
4396 | ||
a434e43f JV |
4397 | list_del(&bond->bond_list); |
4398 | ||
4399 | bond_work_cancel_all(bond); | |
4400 | ||
a434e43f | 4401 | bond_remove_proc_entry(bond); |
c67dfb29 | 4402 | |
f073c7ca TI |
4403 | bond_debug_unregister(bond); |
4404 | ||
22bedad3 | 4405 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4406 | |
4407 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4408 | list_del(&vlan->vlan_list); | |
4409 | kfree(vlan); | |
4410 | } | |
a434e43f JV |
4411 | } |
4412 | ||
1da177e4 LT |
4413 | /*------------------------- Module initialization ---------------------------*/ |
4414 | ||
4415 | /* | |
4416 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4417 | * number of the mode or its string name. A bit complicated because |
4418 | * some mode names are substrings of other names, and calls from sysfs | |
4419 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4420 | */ |
325dcf7a | 4421 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4422 | { |
54b87323 | 4423 | int modeint = -1, i, rv; |
a42e534f | 4424 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4425 | |
a42e534f JV |
4426 | for (p = (char *)buf; *p; p++) |
4427 | if (!(isdigit(*p) || isspace(*p))) | |
4428 | break; | |
4429 | ||
4430 | if (*p) | |
ece95f7f | 4431 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4432 | else |
54b87323 | 4433 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4434 | |
4435 | if (!rv) | |
4436 | return -1; | |
1da177e4 LT |
4437 | |
4438 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4439 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4440 | return tbl[i].mode; |
4441 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4442 | return tbl[i].mode; |
1da177e4 LT |
4443 | } |
4444 | ||
4445 | return -1; | |
4446 | } | |
4447 | ||
4448 | static int bond_check_params(struct bond_params *params) | |
4449 | { | |
a549952a | 4450 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4451 | |
1da177e4 LT |
4452 | /* |
4453 | * Convert string parameters. | |
4454 | */ | |
4455 | if (mode) { | |
4456 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4457 | if (bond_mode == -1) { | |
a4aee5c8 | 4458 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4459 | mode == NULL ? "NULL" : mode); |
4460 | return -EINVAL; | |
4461 | } | |
4462 | } | |
4463 | ||
169a3e66 JV |
4464 | if (xmit_hash_policy) { |
4465 | if ((bond_mode != BOND_MODE_XOR) && | |
4466 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4467 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4468 | bond_mode_name(bond_mode)); |
4469 | } else { | |
4470 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4471 | xmit_hashtype_tbl); | |
4472 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4473 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4474 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4475 | xmit_hash_policy); |
4476 | return -EINVAL; | |
4477 | } | |
4478 | } | |
4479 | } | |
4480 | ||
1da177e4 LT |
4481 | if (lacp_rate) { |
4482 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4483 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4484 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4485 | } else { |
4486 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4487 | if (lacp_fast == -1) { | |
a4aee5c8 | 4488 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4489 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4490 | return -EINVAL; | |
4491 | } | |
4492 | } | |
4493 | } | |
4494 | ||
fd989c83 JV |
4495 | if (ad_select) { |
4496 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4497 | if (params->ad_select == -1) { | |
a4aee5c8 | 4498 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4499 | ad_select == NULL ? "NULL" : ad_select); |
4500 | return -EINVAL; | |
4501 | } | |
4502 | ||
4503 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4504 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4505 | } |
4506 | } else { | |
4507 | params->ad_select = BOND_AD_STABLE; | |
4508 | } | |
4509 | ||
f5841306 | 4510 | if (max_bonds < 0) { |
a4aee5c8 JP |
4511 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4512 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4513 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4514 | } | |
4515 | ||
4516 | if (miimon < 0) { | |
a4aee5c8 JP |
4517 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4518 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4519 | miimon = BOND_LINK_MON_INTERV; |
4520 | } | |
4521 | ||
4522 | if (updelay < 0) { | |
a4aee5c8 JP |
4523 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4524 | updelay, INT_MAX); | |
1da177e4 LT |
4525 | updelay = 0; |
4526 | } | |
4527 | ||
4528 | if (downdelay < 0) { | |
a4aee5c8 JP |
4529 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4530 | downdelay, INT_MAX); | |
1da177e4 LT |
4531 | downdelay = 0; |
4532 | } | |
4533 | ||
4534 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4535 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4536 | use_carrier); | |
1da177e4 LT |
4537 | use_carrier = 1; |
4538 | } | |
4539 | ||
ad246c99 BH |
4540 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4541 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4542 | num_peer_notif); | |
4543 | num_peer_notif = 1; | |
4544 | } | |
4545 | ||
1da177e4 LT |
4546 | /* reset values for 802.3ad */ |
4547 | if (bond_mode == BOND_MODE_8023AD) { | |
4548 | if (!miimon) { | |
a4aee5c8 | 4549 | 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 | 4550 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4551 | miimon = 100; |
4552 | } | |
4553 | } | |
4554 | ||
bb1d9123 AG |
4555 | if (tx_queues < 1 || tx_queues > 255) { |
4556 | pr_warning("Warning: tx_queues (%d) should be between " | |
4557 | "1 and 255, resetting to %d\n", | |
4558 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4559 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4560 | } | |
4561 | ||
ebd8e497 AG |
4562 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4563 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4564 | "not of valid value (0/1), so it was set to " | |
4565 | "0\n", all_slaves_active); | |
4566 | all_slaves_active = 0; | |
4567 | } | |
4568 | ||
c2952c31 FL |
4569 | if (resend_igmp < 0 || resend_igmp > 255) { |
4570 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4571 | "0 and 255, resetting to %d\n", | |
4572 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4573 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4574 | } | |
4575 | ||
1da177e4 LT |
4576 | /* reset values for TLB/ALB */ |
4577 | if ((bond_mode == BOND_MODE_TLB) || | |
4578 | (bond_mode == BOND_MODE_ALB)) { | |
4579 | if (!miimon) { | |
a4aee5c8 | 4580 | 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 | 4581 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4582 | miimon = 100; |
4583 | } | |
4584 | } | |
4585 | ||
4586 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4587 | 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", |
4588 | updelay); | |
1da177e4 LT |
4589 | } |
4590 | ||
4591 | if (!miimon) { | |
4592 | if (updelay || downdelay) { | |
4593 | /* just warn the user the up/down delay will have | |
4594 | * no effect since miimon is zero... | |
4595 | */ | |
a4aee5c8 JP |
4596 | 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", |
4597 | updelay, downdelay); | |
1da177e4 LT |
4598 | } |
4599 | } else { | |
4600 | /* don't allow arp monitoring */ | |
4601 | if (arp_interval) { | |
a4aee5c8 JP |
4602 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4603 | miimon, arp_interval); | |
1da177e4 LT |
4604 | arp_interval = 0; |
4605 | } | |
4606 | ||
4607 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4608 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4609 | updelay, miimon, | |
4610 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4611 | } |
4612 | ||
4613 | updelay /= miimon; | |
4614 | ||
4615 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4616 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4617 | downdelay, miimon, | |
4618 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4619 | } |
4620 | ||
4621 | downdelay /= miimon; | |
4622 | } | |
4623 | ||
4624 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4625 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4626 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4627 | arp_interval = BOND_LINK_ARP_INTERV; |
4628 | } | |
4629 | ||
4630 | for (arp_ip_count = 0; | |
4631 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4632 | arp_ip_count++) { | |
4633 | /* not complete check, but should be good enough to | |
4634 | catch mistakes */ | |
4635 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4636 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4637 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4638 | arp_interval = 0; |
4639 | } else { | |
d3bb52b0 | 4640 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4641 | arp_target[arp_ip_count] = ip; |
4642 | } | |
4643 | } | |
4644 | ||
4645 | if (arp_interval && !arp_ip_count) { | |
4646 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4647 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4648 | arp_interval); | |
1da177e4 LT |
4649 | arp_interval = 0; |
4650 | } | |
4651 | ||
f5b2b966 JV |
4652 | if (arp_validate) { |
4653 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4654 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4655 | return -EINVAL; |
4656 | } | |
4657 | if (!arp_interval) { | |
a4aee5c8 | 4658 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4659 | return -EINVAL; |
4660 | } | |
4661 | ||
4662 | arp_validate_value = bond_parse_parm(arp_validate, | |
4663 | arp_validate_tbl); | |
4664 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4665 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4666 | arp_validate == NULL ? "NULL" : arp_validate); |
4667 | return -EINVAL; | |
4668 | } | |
4669 | } else | |
4670 | arp_validate_value = 0; | |
4671 | ||
1da177e4 | 4672 | if (miimon) { |
a4aee5c8 | 4673 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4674 | } else if (arp_interval) { |
4675 | int i; | |
4676 | ||
a4aee5c8 JP |
4677 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4678 | arp_interval, | |
4679 | arp_validate_tbl[arp_validate_value].modename, | |
4680 | arp_ip_count); | |
1da177e4 LT |
4681 | |
4682 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4683 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4684 | |
e5e2a8fd | 4685 | pr_info("\n"); |
1da177e4 | 4686 | |
b8a9787e | 4687 | } else if (max_bonds) { |
1da177e4 LT |
4688 | /* miimon and arp_interval not set, we need one so things |
4689 | * work as expected, see bonding.txt for details | |
4690 | */ | |
b2730f4f | 4691 | pr_debug("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n"); |
1da177e4 LT |
4692 | } |
4693 | ||
4694 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4695 | /* currently, using a primary only makes sense | |
4696 | * in active backup, TLB or ALB modes | |
4697 | */ | |
a4aee5c8 JP |
4698 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4699 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4700 | primary = NULL; |
4701 | } | |
4702 | ||
a549952a JP |
4703 | if (primary && primary_reselect) { |
4704 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4705 | pri_reselect_tbl); | |
4706 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4707 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4708 | primary_reselect == |
4709 | NULL ? "NULL" : primary_reselect); | |
4710 | return -EINVAL; | |
4711 | } | |
4712 | } else { | |
4713 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4714 | } | |
4715 | ||
3915c1e8 JV |
4716 | if (fail_over_mac) { |
4717 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4718 | fail_over_mac_tbl); | |
4719 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4720 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4721 | arp_validate == NULL ? "NULL" : arp_validate); |
4722 | return -EINVAL; | |
4723 | } | |
4724 | ||
4725 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4726 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4727 | } else { |
4728 | fail_over_mac_value = BOND_FOM_NONE; | |
4729 | } | |
dd957c57 | 4730 | |
1da177e4 LT |
4731 | /* fill params struct with the proper values */ |
4732 | params->mode = bond_mode; | |
169a3e66 | 4733 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4734 | params->miimon = miimon; |
ad246c99 | 4735 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4736 | params->arp_interval = arp_interval; |
f5b2b966 | 4737 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4738 | params->updelay = updelay; |
4739 | params->downdelay = downdelay; | |
4740 | params->use_carrier = use_carrier; | |
4741 | params->lacp_fast = lacp_fast; | |
4742 | params->primary[0] = 0; | |
a549952a | 4743 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4744 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4745 | params->tx_queues = tx_queues; |
ebd8e497 | 4746 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4747 | params->resend_igmp = resend_igmp; |
655f8919 | 4748 | params->min_links = min_links; |
1da177e4 LT |
4749 | |
4750 | if (primary) { | |
4751 | strncpy(params->primary, primary, IFNAMSIZ); | |
4752 | params->primary[IFNAMSIZ - 1] = 0; | |
4753 | } | |
4754 | ||
4755 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4756 | ||
4757 | return 0; | |
4758 | } | |
4759 | ||
0daa2303 | 4760 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4761 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4762 | |
e8a0464c DM |
4763 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4764 | struct netdev_queue *txq, | |
4765 | void *_unused) | |
c773e847 DM |
4766 | { |
4767 | lockdep_set_class(&txq->_xmit_lock, | |
4768 | &bonding_netdev_xmit_lock_key); | |
4769 | } | |
4770 | ||
4771 | static void bond_set_lockdep_class(struct net_device *dev) | |
4772 | { | |
cf508b12 DM |
4773 | lockdep_set_class(&dev->addr_list_lock, |
4774 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4775 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4776 | } |
4777 | ||
181470fc SH |
4778 | /* |
4779 | * Called from registration process | |
4780 | */ | |
4781 | static int bond_init(struct net_device *bond_dev) | |
4782 | { | |
4783 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4784 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4785 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4786 | |
4787 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4788 | ||
9fe0617d NH |
4789 | /* |
4790 | * Initialize locks that may be required during | |
4791 | * en/deslave operations. All of the bond_open work | |
4792 | * (of which this is part) should really be moved to | |
4793 | * a phase prior to dev_open | |
4794 | */ | |
4795 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4796 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4797 | ||
181470fc SH |
4798 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4799 | if (!bond->wq) | |
4800 | return -ENOMEM; | |
4801 | ||
4802 | bond_set_lockdep_class(bond_dev); | |
4803 | ||
181470fc | 4804 | bond_create_proc_entry(bond); |
ec87fd3b | 4805 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4806 | |
6151b3d4 | 4807 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4808 | |
f073c7ca TI |
4809 | bond_debug_register(bond); |
4810 | ||
22bedad3 | 4811 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4812 | return 0; |
4813 | } | |
4814 | ||
88ead977 EB |
4815 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4816 | { | |
4817 | if (tb[IFLA_ADDRESS]) { | |
4818 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4819 | return -EINVAL; | |
4820 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4821 | return -EADDRNOTAVAIL; | |
4822 | } | |
4823 | return 0; | |
4824 | } | |
4825 | ||
d5da4510 JP |
4826 | static int bond_get_tx_queues(struct net *net, struct nlattr *tb[], |
4827 | unsigned int *num_queues, | |
4828 | unsigned int *real_num_queues) | |
4829 | { | |
4830 | *num_queues = tx_queues; | |
4831 | return 0; | |
4832 | } | |
4833 | ||
88ead977 EB |
4834 | static struct rtnl_link_ops bond_link_ops __read_mostly = { |
4835 | .kind = "bond", | |
6639104b | 4836 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4837 | .setup = bond_setup, |
4838 | .validate = bond_validate, | |
d5da4510 | 4839 | .get_tx_queues = bond_get_tx_queues, |
88ead977 EB |
4840 | }; |
4841 | ||
dfe60397 | 4842 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4843 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4844 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4845 | * set up our sysfs entries. | |
4846 | */ | |
ec87fd3b | 4847 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4848 | { |
4849 | struct net_device *bond_dev; | |
4850 | int res; | |
4851 | ||
4852 | rtnl_lock(); | |
027ea041 | 4853 | |
1c5cae81 JP |
4854 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4855 | name ? name : "bond%d", | |
4856 | bond_setup, tx_queues); | |
dfe60397 | 4857 | if (!bond_dev) { |
a4aee5c8 | 4858 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4859 | rtnl_unlock(); |
4860 | return -ENOMEM; | |
dfe60397 MW |
4861 | } |
4862 | ||
ec87fd3b | 4863 | dev_net_set(bond_dev, net); |
88ead977 EB |
4864 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4865 | ||
dfe60397 | 4866 | res = register_netdevice(bond_dev); |
0daa2303 | 4867 | |
e826eafa PO |
4868 | netif_carrier_off(bond_dev); |
4869 | ||
7e083840 | 4870 | rtnl_unlock(); |
9e2e61fb AW |
4871 | if (res < 0) |
4872 | bond_destructor(bond_dev); | |
30c15ba9 | 4873 | return res; |
dfe60397 MW |
4874 | } |
4875 | ||
2c8c1e72 | 4876 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4877 | { |
15449745 | 4878 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4879 | |
4880 | bn->net = net; | |
4881 | INIT_LIST_HEAD(&bn->dev_list); | |
4882 | ||
ec87fd3b | 4883 | bond_create_proc_dir(bn); |
4c22400a | 4884 | bond_create_sysfs(bn); |
15449745 EB |
4885 | |
4886 | return 0; | |
ec87fd3b EB |
4887 | } |
4888 | ||
2c8c1e72 | 4889 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4890 | { |
15449745 | 4891 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b | 4892 | |
4c22400a | 4893 | bond_destroy_sysfs(bn); |
ec87fd3b | 4894 | bond_destroy_proc_dir(bn); |
ec87fd3b EB |
4895 | } |
4896 | ||
4897 | static struct pernet_operations bond_net_ops = { | |
4898 | .init = bond_net_init, | |
4899 | .exit = bond_net_exit, | |
15449745 EB |
4900 | .id = &bond_net_id, |
4901 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4902 | }; |
4903 | ||
1da177e4 LT |
4904 | static int __init bonding_init(void) |
4905 | { | |
1da177e4 LT |
4906 | int i; |
4907 | int res; | |
4908 | ||
bd33acc3 | 4909 | pr_info("%s", bond_version); |
1da177e4 | 4910 | |
dfe60397 | 4911 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4912 | if (res) |
dfe60397 | 4913 | goto out; |
1da177e4 | 4914 | |
15449745 | 4915 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4916 | if (res) |
4917 | goto out; | |
027ea041 | 4918 | |
88ead977 EB |
4919 | res = rtnl_link_register(&bond_link_ops); |
4920 | if (res) | |
6639104b | 4921 | goto err_link; |
88ead977 | 4922 | |
f073c7ca TI |
4923 | bond_create_debugfs(); |
4924 | ||
1da177e4 | 4925 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4926 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4927 | if (res) |
4928 | goto err; | |
1da177e4 LT |
4929 | } |
4930 | ||
1da177e4 | 4931 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4932 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
dfe60397 | 4933 | out: |
1da177e4 | 4934 | return res; |
88ead977 EB |
4935 | err: |
4936 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4937 | err_link: |
15449745 | 4938 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4939 | goto out; |
dfe60397 | 4940 | |
1da177e4 LT |
4941 | } |
4942 | ||
4943 | static void __exit bonding_exit(void) | |
4944 | { | |
4945 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4946 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4947 | |
f073c7ca | 4948 | bond_destroy_debugfs(); |
ae68c398 | 4949 | |
88ead977 | 4950 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 4951 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4952 | |
4953 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4954 | /* |
4955 | * Make sure we don't have an imbalance on our netpoll blocking | |
4956 | */ | |
4957 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4958 | #endif |
1da177e4 LT |
4959 | } |
4960 | ||
4961 | module_init(bonding_init); | |
4962 | module_exit(bonding_exit); | |
4963 | MODULE_LICENSE("GPL"); | |
4964 | MODULE_VERSION(DRV_VERSION); | |
4965 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4966 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 4967 | MODULE_ALIAS_RTNL_LINK("bond"); |