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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 | */ | |
431 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
432 | { | |
454d7c9b | 433 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
434 | struct slave *slave; |
435 | int i, res; | |
436 | ||
437 | bond_for_each_slave(bond, slave, i) { | |
438 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 439 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
440 | |
441 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
442 | slave_ops->ndo_vlan_rx_add_vid) { |
443 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
444 | } |
445 | } | |
446 | ||
447 | res = bond_add_vlan(bond, vid); | |
448 | if (res) { | |
a4aee5c8 | 449 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
450 | bond_dev->name, vid); |
451 | } | |
452 | } | |
453 | ||
454 | /** | |
455 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
456 | * @bond_dev: bonding net device that got called | |
457 | * @vid: vlan id being removed | |
458 | */ | |
459 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
460 | { | |
454d7c9b | 461 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 462 | struct slave *slave; |
1da177e4 LT |
463 | int i, res; |
464 | ||
465 | bond_for_each_slave(bond, slave, i) { | |
466 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 467 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
468 | |
469 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 470 | slave_ops->ndo_vlan_rx_kill_vid) { |
eb7cc59a | 471 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
1da177e4 LT |
472 | } |
473 | } | |
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 LT |
478 | bond_dev->name, vid); |
479 | } | |
480 | } | |
481 | ||
482 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
483 | { | |
484 | struct vlan_entry *vlan; | |
eb7cc59a | 485 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 486 | |
1da177e4 | 487 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || |
eb7cc59a | 488 | !(slave_ops->ndo_vlan_rx_add_vid)) |
03dc2f4c | 489 | return; |
1da177e4 | 490 | |
eb7cc59a SH |
491 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
492 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
493 | } |
494 | ||
3d632c3f SH |
495 | static void bond_del_vlans_from_slave(struct bonding *bond, |
496 | struct net_device *slave_dev) | |
1da177e4 | 497 | { |
eb7cc59a | 498 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 499 | struct vlan_entry *vlan; |
1da177e4 LT |
500 | |
501 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 502 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
cc0e4070 | 503 | return; |
1da177e4 LT |
504 | |
505 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
f35188fa JV |
506 | if (!vlan->vlan_id) |
507 | continue; | |
eb7cc59a | 508 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
1da177e4 | 509 | } |
1da177e4 LT |
510 | } |
511 | ||
512 | /*------------------------------- Link status -------------------------------*/ | |
513 | ||
ff59c456 JV |
514 | /* |
515 | * Set the carrier state for the master according to the state of its | |
516 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
517 | * do special 802.3ad magic. | |
518 | * | |
519 | * Returns zero if carrier state does not change, nonzero if it does. | |
520 | */ | |
521 | static int bond_set_carrier(struct bonding *bond) | |
522 | { | |
523 | struct slave *slave; | |
524 | int i; | |
525 | ||
526 | if (bond->slave_cnt == 0) | |
527 | goto down; | |
528 | ||
529 | if (bond->params.mode == BOND_MODE_8023AD) | |
530 | return bond_3ad_set_carrier(bond); | |
531 | ||
532 | bond_for_each_slave(bond, slave, i) { | |
533 | if (slave->link == BOND_LINK_UP) { | |
534 | if (!netif_carrier_ok(bond->dev)) { | |
535 | netif_carrier_on(bond->dev); | |
536 | return 1; | |
537 | } | |
538 | return 0; | |
539 | } | |
540 | } | |
541 | ||
542 | down: | |
543 | if (netif_carrier_ok(bond->dev)) { | |
544 | netif_carrier_off(bond->dev); | |
545 | return 1; | |
546 | } | |
547 | return 0; | |
548 | } | |
549 | ||
1da177e4 LT |
550 | /* |
551 | * Get link speed and duplex from the slave's base driver | |
552 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 553 | * values are invalid, set speed and duplex to -1, |
1da177e4 LT |
554 | * and return error. |
555 | */ | |
556 | static int bond_update_speed_duplex(struct slave *slave) | |
557 | { | |
558 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 559 | struct ethtool_cmd ecmd; |
5d30530e | 560 | u32 slave_speed; |
61a44b9c | 561 | int res; |
1da177e4 | 562 | |
589665f5 DC |
563 | slave->speed = SPEED_UNKNOWN; |
564 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 565 | |
4bc71cb9 | 566 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 567 | if (res < 0) |
1da177e4 | 568 | return -1; |
1da177e4 | 569 | |
4bc71cb9 | 570 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 571 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
1da177e4 | 572 | return -1; |
1da177e4 | 573 | |
4bc71cb9 | 574 | switch (ecmd.duplex) { |
1da177e4 LT |
575 | case DUPLEX_FULL: |
576 | case DUPLEX_HALF: | |
577 | break; | |
578 | default: | |
579 | return -1; | |
580 | } | |
581 | ||
5d30530e | 582 | slave->speed = slave_speed; |
4bc71cb9 | 583 | slave->duplex = ecmd.duplex; |
1da177e4 LT |
584 | |
585 | return 0; | |
586 | } | |
587 | ||
588 | /* | |
589 | * if <dev> supports MII link status reporting, check its link status. | |
590 | * | |
591 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 592 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
593 | * |
594 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
595 | * can't tell and just pretend it is), or 0, meaning that the link is | |
596 | * down. | |
597 | * | |
598 | * If reporting is non-zero, instead of faking link up, return -1 if | |
599 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
600 | * support them). If use_carrier is set, return whatever it says. | |
601 | * It'd be nice if there was a good way to tell if a driver supports | |
602 | * netif_carrier, but there really isn't. | |
603 | */ | |
3d632c3f SH |
604 | static int bond_check_dev_link(struct bonding *bond, |
605 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 606 | { |
eb7cc59a | 607 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 608 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
609 | struct ifreq ifr; |
610 | struct mii_ioctl_data *mii; | |
1da177e4 | 611 | |
6c988853 PG |
612 | if (!reporting && !netif_running(slave_dev)) |
613 | return 0; | |
614 | ||
eb7cc59a | 615 | if (bond->params.use_carrier) |
1da177e4 | 616 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 617 | |
29112f4e JP |
618 | /* Try to get link status using Ethtool first. */ |
619 | if (slave_dev->ethtool_ops) { | |
620 | if (slave_dev->ethtool_ops->get_link) { | |
621 | u32 link; | |
622 | ||
623 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
624 | ||
625 | return link ? BMSR_LSTATUS : 0; | |
626 | } | |
627 | } | |
628 | ||
3d632c3f | 629 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 630 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
631 | if (ioctl) { |
632 | /* TODO: set pointer to correct ioctl on a per team member */ | |
633 | /* bases to make this more efficient. that is, once */ | |
634 | /* we determine the correct ioctl, we will always */ | |
635 | /* call it and not the others for that team */ | |
636 | /* member. */ | |
637 | ||
638 | /* | |
639 | * We cannot assume that SIOCGMIIPHY will also read a | |
640 | * register; not all network drivers (e.g., e100) | |
641 | * support that. | |
642 | */ | |
643 | ||
644 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
645 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
646 | mii = if_mii(&ifr); | |
647 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
648 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
649 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
650 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
651 | } |
652 | } | |
653 | ||
1da177e4 LT |
654 | /* |
655 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 656 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
657 | * cannot report link status). If not reporting, pretend |
658 | * we're ok. | |
659 | */ | |
3d632c3f | 660 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
661 | } |
662 | ||
663 | /*----------------------------- Multicast list ------------------------------*/ | |
664 | ||
1da177e4 LT |
665 | /* |
666 | * Push the promiscuity flag down to appropriate slaves | |
667 | */ | |
7e1a1ac1 | 668 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 669 | { |
7e1a1ac1 | 670 | int err = 0; |
1da177e4 LT |
671 | if (USES_PRIMARY(bond->params.mode)) { |
672 | /* write lock already acquired */ | |
673 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
674 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
675 | inc); | |
1da177e4 LT |
676 | } |
677 | } else { | |
678 | struct slave *slave; | |
679 | int i; | |
680 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
681 | err = dev_set_promiscuity(slave->dev, inc); |
682 | if (err) | |
683 | return err; | |
1da177e4 LT |
684 | } |
685 | } | |
7e1a1ac1 | 686 | return err; |
1da177e4 LT |
687 | } |
688 | ||
689 | /* | |
690 | * Push the allmulti flag down to all slaves | |
691 | */ | |
7e1a1ac1 | 692 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 693 | { |
7e1a1ac1 | 694 | int err = 0; |
1da177e4 LT |
695 | if (USES_PRIMARY(bond->params.mode)) { |
696 | /* write lock already acquired */ | |
697 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
698 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
699 | inc); | |
1da177e4 LT |
700 | } |
701 | } else { | |
702 | struct slave *slave; | |
703 | int i; | |
704 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
705 | err = dev_set_allmulti(slave->dev, inc); |
706 | if (err) | |
707 | return err; | |
1da177e4 LT |
708 | } |
709 | } | |
7e1a1ac1 | 710 | return err; |
1da177e4 LT |
711 | } |
712 | ||
713 | /* | |
714 | * Add a Multicast address to slaves | |
715 | * according to mode | |
716 | */ | |
22bedad3 | 717 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
718 | { |
719 | if (USES_PRIMARY(bond->params.mode)) { | |
720 | /* write lock already acquired */ | |
3d632c3f | 721 | if (bond->curr_active_slave) |
22bedad3 | 722 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
723 | } else { |
724 | struct slave *slave; | |
725 | int i; | |
3d632c3f SH |
726 | |
727 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 728 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
729 | } |
730 | } | |
731 | ||
732 | /* | |
733 | * Remove a multicast address from slave | |
734 | * according to mode | |
735 | */ | |
22bedad3 | 736 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
737 | { |
738 | if (USES_PRIMARY(bond->params.mode)) { | |
739 | /* write lock already acquired */ | |
3d632c3f | 740 | if (bond->curr_active_slave) |
22bedad3 | 741 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
742 | } else { |
743 | struct slave *slave; | |
744 | int i; | |
745 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 746 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
747 | } |
748 | } | |
749 | } | |
750 | ||
a816c7c7 | 751 | |
5a37e8ca | 752 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
753 | { |
754 | struct in_device *in_dev; | |
a816c7c7 JV |
755 | |
756 | rcu_read_lock(); | |
5a37e8ca | 757 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 758 | if (in_dev) |
24912420 | 759 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
760 | rcu_read_unlock(); |
761 | } | |
762 | ||
5a37e8ca FL |
763 | /* |
764 | * Retrieve the list of registered multicast addresses for the bonding | |
765 | * device and retransmit an IGMP JOIN request to the current active | |
766 | * slave. | |
767 | */ | |
768 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
769 | { | |
770 | struct net_device *vlan_dev; | |
771 | struct vlan_entry *vlan; | |
772 | ||
773 | read_lock(&bond->lock); | |
774 | ||
775 | /* rejoin all groups on bond device */ | |
776 | __bond_resend_igmp_join_requests(bond->dev); | |
777 | ||
778 | /* rejoin all groups on vlan devices */ | |
cc0e4070 JP |
779 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
780 | rcu_read_lock(); | |
781 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
782 | vlan->vlan_id); | |
783 | rcu_read_unlock(); | |
784 | if (vlan_dev) | |
785 | __bond_resend_igmp_join_requests(vlan_dev); | |
5a37e8ca FL |
786 | } |
787 | ||
e6d265e8 | 788 | if (--bond->igmp_retrans > 0) |
c2952c31 | 789 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
e6d265e8 | 790 | |
5a37e8ca FL |
791 | read_unlock(&bond->lock); |
792 | } | |
793 | ||
379b7383 | 794 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
795 | { |
796 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 797 | mcast_work.work); |
5a37e8ca FL |
798 | bond_resend_igmp_join_requests(bond); |
799 | } | |
800 | ||
1da177e4 LT |
801 | /* |
802 | * flush all members of flush->mc_list from device dev->mc_list | |
803 | */ | |
3d632c3f SH |
804 | static void bond_mc_list_flush(struct net_device *bond_dev, |
805 | struct net_device *slave_dev) | |
1da177e4 | 806 | { |
454d7c9b | 807 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 808 | struct netdev_hw_addr *ha; |
1da177e4 | 809 | |
22bedad3 JP |
810 | netdev_for_each_mc_addr(ha, bond_dev) |
811 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
812 | |
813 | if (bond->params.mode == BOND_MODE_8023AD) { | |
814 | /* del lacpdu mc addr from mc list */ | |
815 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
816 | ||
22bedad3 | 817 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
818 | } |
819 | } | |
820 | ||
821 | /*--------------------------- Active slave change ---------------------------*/ | |
822 | ||
823 | /* | |
824 | * Update the mc list and multicast-related flags for the new and | |
825 | * old active slaves (if any) according to the multicast mode, and | |
826 | * promiscuous flags unconditionally. | |
827 | */ | |
3d632c3f SH |
828 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
829 | struct slave *old_active) | |
1da177e4 | 830 | { |
22bedad3 | 831 | struct netdev_hw_addr *ha; |
1da177e4 | 832 | |
3d632c3f | 833 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
834 | /* nothing to do - mc list is already up-to-date on |
835 | * all slaves | |
836 | */ | |
837 | return; | |
1da177e4 LT |
838 | |
839 | if (old_active) { | |
3d632c3f | 840 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 841 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 842 | |
3d632c3f | 843 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 844 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 845 | |
22bedad3 JP |
846 | netdev_for_each_mc_addr(ha, bond->dev) |
847 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
848 | } |
849 | ||
850 | if (new_active) { | |
7e1a1ac1 | 851 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 852 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 853 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 854 | |
3d632c3f | 855 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 856 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 857 | |
22bedad3 JP |
858 | netdev_for_each_mc_addr(ha, bond->dev) |
859 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
860 | } |
861 | } | |
862 | ||
3915c1e8 JV |
863 | /* |
864 | * bond_do_fail_over_mac | |
865 | * | |
866 | * Perform special MAC address swapping for fail_over_mac settings | |
867 | * | |
868 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
869 | */ | |
870 | static void bond_do_fail_over_mac(struct bonding *bond, | |
871 | struct slave *new_active, | |
872 | struct slave *old_active) | |
1f78d9f9 HE |
873 | __releases(&bond->curr_slave_lock) |
874 | __releases(&bond->lock) | |
875 | __acquires(&bond->lock) | |
876 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
877 | { |
878 | u8 tmp_mac[ETH_ALEN]; | |
879 | struct sockaddr saddr; | |
880 | int rv; | |
881 | ||
882 | switch (bond->params.fail_over_mac) { | |
883 | case BOND_FOM_ACTIVE: | |
884 | if (new_active) | |
885 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
886 | new_active->dev->addr_len); | |
887 | break; | |
888 | case BOND_FOM_FOLLOW: | |
889 | /* | |
890 | * if new_active && old_active, swap them | |
891 | * if just old_active, do nothing (going to no active slave) | |
892 | * if just new_active, set new_active to bond's MAC | |
893 | */ | |
894 | if (!new_active) | |
895 | return; | |
896 | ||
897 | write_unlock_bh(&bond->curr_slave_lock); | |
898 | read_unlock(&bond->lock); | |
899 | ||
900 | if (old_active) { | |
901 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
902 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
903 | ETH_ALEN); | |
904 | saddr.sa_family = new_active->dev->type; | |
905 | } else { | |
906 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
907 | saddr.sa_family = bond->dev->type; | |
908 | } | |
909 | ||
910 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
911 | if (rv) { | |
a4aee5c8 | 912 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
913 | bond->dev->name, -rv, new_active->dev->name); |
914 | goto out; | |
915 | } | |
916 | ||
917 | if (!old_active) | |
918 | goto out; | |
919 | ||
920 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
921 | saddr.sa_family = old_active->dev->type; | |
922 | ||
923 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
924 | if (rv) | |
a4aee5c8 | 925 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
926 | bond->dev->name, -rv, new_active->dev->name); |
927 | out: | |
928 | read_lock(&bond->lock); | |
929 | write_lock_bh(&bond->curr_slave_lock); | |
930 | break; | |
931 | default: | |
a4aee5c8 | 932 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
933 | bond->dev->name, bond->params.fail_over_mac); |
934 | break; | |
935 | } | |
936 | ||
937 | } | |
938 | ||
a549952a JP |
939 | static bool bond_should_change_active(struct bonding *bond) |
940 | { | |
941 | struct slave *prim = bond->primary_slave; | |
942 | struct slave *curr = bond->curr_active_slave; | |
943 | ||
944 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
945 | return true; | |
946 | if (bond->force_primary) { | |
947 | bond->force_primary = false; | |
948 | return true; | |
949 | } | |
950 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
951 | (prim->speed < curr->speed || | |
952 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
953 | return false; | |
954 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
955 | return false; | |
956 | return true; | |
957 | } | |
3915c1e8 | 958 | |
1da177e4 LT |
959 | /** |
960 | * find_best_interface - select the best available slave to be the active one | |
961 | * @bond: our bonding struct | |
962 | * | |
963 | * Warning: Caller must hold curr_slave_lock for writing. | |
964 | */ | |
965 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
966 | { | |
967 | struct slave *new_active, *old_active; | |
968 | struct slave *bestslave = NULL; | |
969 | int mintime = bond->params.updelay; | |
970 | int i; | |
971 | ||
49b4ad92 | 972 | new_active = bond->curr_active_slave; |
1da177e4 LT |
973 | |
974 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 975 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 976 | new_active = bond->first_slave; |
3d632c3f | 977 | else |
1da177e4 | 978 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
979 | } |
980 | ||
1da177e4 | 981 | if ((bond->primary_slave) && |
a549952a JP |
982 | bond->primary_slave->link == BOND_LINK_UP && |
983 | bond_should_change_active(bond)) { | |
1da177e4 LT |
984 | new_active = bond->primary_slave; |
985 | } | |
986 | ||
987 | /* remember where to stop iterating over the slaves */ | |
988 | old_active = new_active; | |
989 | ||
990 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
991 | if (new_active->link == BOND_LINK_UP) { |
992 | return new_active; | |
993 | } else if (new_active->link == BOND_LINK_BACK && | |
994 | IS_UP(new_active->dev)) { | |
995 | /* link up, but waiting for stabilization */ | |
996 | if (new_active->delay < mintime) { | |
997 | mintime = new_active->delay; | |
998 | bestslave = new_active; | |
1da177e4 LT |
999 | } |
1000 | } | |
1001 | } | |
1002 | ||
1003 | return bestslave; | |
1004 | } | |
1005 | ||
ad246c99 BH |
1006 | static bool bond_should_notify_peers(struct bonding *bond) |
1007 | { | |
1008 | struct slave *slave = bond->curr_active_slave; | |
1009 | ||
1010 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1011 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1012 | ||
1013 | if (!slave || !bond->send_peer_notif || | |
1014 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1015 | return false; | |
1016 | ||
1017 | bond->send_peer_notif--; | |
1018 | return true; | |
1019 | } | |
1020 | ||
1da177e4 LT |
1021 | /** |
1022 | * change_active_interface - change the active slave into the specified one | |
1023 | * @bond: our bonding struct | |
1024 | * @new: the new slave to make the active one | |
1025 | * | |
1026 | * Set the new slave to the bond's settings and unset them on the old | |
1027 | * curr_active_slave. | |
1028 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1029 | * | |
1030 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1031 | * because it is apparently the best available slave we have, even though its | |
1032 | * updelay hasn't timed out yet. | |
1033 | * | |
3915c1e8 JV |
1034 | * If new_active is not NULL, caller must hold bond->lock for read and |
1035 | * curr_slave_lock for write_bh. | |
1da177e4 | 1036 | */ |
a77b5325 | 1037 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1038 | { |
1039 | struct slave *old_active = bond->curr_active_slave; | |
1040 | ||
3d632c3f | 1041 | if (old_active == new_active) |
1da177e4 | 1042 | return; |
1da177e4 LT |
1043 | |
1044 | if (new_active) { | |
b2220cad JV |
1045 | new_active->jiffies = jiffies; |
1046 | ||
1da177e4 LT |
1047 | if (new_active->link == BOND_LINK_BACK) { |
1048 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1049 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1050 | bond->dev->name, new_active->dev->name, | |
1051 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | new_active->delay = 0; | |
1055 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1056 | |
3d632c3f | 1057 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1058 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1059 | |
58402054 | 1060 | if (bond_is_lb(bond)) |
1da177e4 | 1061 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1062 | } else { |
1063 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1064 | pr_info("%s: making interface %s the new active one.\n", |
1065 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1066 | } |
1067 | } | |
1068 | } | |
1069 | ||
3d632c3f | 1070 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1071 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1072 | |
58402054 | 1073 | if (bond_is_lb(bond)) { |
1da177e4 | 1074 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1075 | if (old_active) |
1076 | bond_set_slave_inactive_flags(old_active); | |
1077 | if (new_active) | |
1078 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1079 | } else { |
1080 | bond->curr_active_slave = new_active; | |
1081 | } | |
c3ade5ca JV |
1082 | |
1083 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1084 | if (old_active) |
c3ade5ca | 1085 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1086 | |
1087 | if (new_active) { | |
ad246c99 BH |
1088 | bool should_notify_peers = false; |
1089 | ||
c3ade5ca | 1090 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1091 | |
709f8a45 OG |
1092 | if (bond->params.fail_over_mac) |
1093 | bond_do_fail_over_mac(bond, new_active, | |
1094 | old_active); | |
3915c1e8 | 1095 | |
ad246c99 BH |
1096 | if (netif_running(bond->dev)) { |
1097 | bond->send_peer_notif = | |
1098 | bond->params.num_peer_notif; | |
1099 | should_notify_peers = | |
1100 | bond_should_notify_peers(bond); | |
1101 | } | |
1102 | ||
01f3109d OG |
1103 | write_unlock_bh(&bond->curr_slave_lock); |
1104 | read_unlock(&bond->lock); | |
1105 | ||
75c78500 | 1106 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1107 | if (should_notify_peers) |
1108 | netdev_bonding_change(bond->dev, | |
1109 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1110 | |
1111 | read_lock(&bond->lock); | |
1112 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1113 | } |
c3ade5ca | 1114 | } |
a2fd940f | 1115 | |
5a37e8ca | 1116 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1117 | * all were sent on curr_active_slave. |
1118 | * resend only if bond is brought up with the affected | |
1119 | * bonding modes and the retransmission is enabled */ | |
1120 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1121 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1122 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1123 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1124 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1125 | } |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | /** | |
1129 | * bond_select_active_slave - select a new active slave, if needed | |
1130 | * @bond: our bonding struct | |
1131 | * | |
3d632c3f | 1132 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1133 | * - The old curr_active_slave has been released or lost its link. |
1134 | * - The primary_slave has got its link back. | |
1135 | * - A slave has got its link back and there's no old curr_active_slave. | |
1136 | * | |
3915c1e8 | 1137 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1138 | */ |
a77b5325 | 1139 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1140 | { |
1141 | struct slave *best_slave; | |
ff59c456 | 1142 | int rv; |
1da177e4 LT |
1143 | |
1144 | best_slave = bond_find_best_slave(bond); | |
1145 | if (best_slave != bond->curr_active_slave) { | |
1146 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1147 | rv = bond_set_carrier(bond); |
1148 | if (!rv) | |
1149 | return; | |
1150 | ||
1151 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1152 | pr_info("%s: first active interface up!\n", |
1153 | bond->dev->name); | |
ff59c456 | 1154 | } else { |
a4aee5c8 JP |
1155 | pr_info("%s: now running without any active interface !\n", |
1156 | bond->dev->name); | |
ff59c456 | 1157 | } |
1da177e4 LT |
1158 | } |
1159 | } | |
1160 | ||
1161 | /*--------------------------- slave list handling ---------------------------*/ | |
1162 | ||
1163 | /* | |
1164 | * This function attaches the slave to the end of list. | |
1165 | * | |
1166 | * bond->lock held for writing by caller. | |
1167 | */ | |
1168 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1169 | { | |
1170 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1171 | new_slave->next = new_slave; | |
1172 | new_slave->prev = new_slave; | |
1173 | bond->first_slave = new_slave; | |
1174 | } else { | |
1175 | new_slave->next = bond->first_slave; | |
1176 | new_slave->prev = bond->first_slave->prev; | |
1177 | new_slave->next->prev = new_slave; | |
1178 | new_slave->prev->next = new_slave; | |
1179 | } | |
1180 | ||
1181 | bond->slave_cnt++; | |
1182 | } | |
1183 | ||
1184 | /* | |
1185 | * This function detaches the slave from the list. | |
1186 | * WARNING: no check is made to verify if the slave effectively | |
1187 | * belongs to <bond>. | |
1188 | * Nothing is freed on return, structures are just unchained. | |
1189 | * If any slave pointer in bond was pointing to <slave>, | |
1190 | * it should be changed by the calling function. | |
1191 | * | |
1192 | * bond->lock held for writing by caller. | |
1193 | */ | |
1194 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1195 | { | |
3d632c3f | 1196 | if (slave->next) |
1da177e4 | 1197 | slave->next->prev = slave->prev; |
1da177e4 | 1198 | |
3d632c3f | 1199 | if (slave->prev) |
1da177e4 | 1200 | slave->prev->next = slave->next; |
1da177e4 LT |
1201 | |
1202 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1203 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1204 | bond->first_slave = slave->next; | |
1205 | } else { | |
1206 | bond->first_slave = NULL; /* slave was the last one */ | |
1207 | } | |
1208 | } | |
1209 | ||
1210 | slave->next = NULL; | |
1211 | slave->prev = NULL; | |
1212 | bond->slave_cnt--; | |
1213 | } | |
1214 | ||
f6dc31a8 | 1215 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1216 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1217 | { |
8a8efa22 AW |
1218 | struct netpoll *np; |
1219 | int err = 0; | |
f6dc31a8 | 1220 | |
8a8efa22 AW |
1221 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1222 | err = -ENOMEM; | |
1223 | if (!np) | |
1224 | goto out; | |
1225 | ||
1226 | np->dev = slave->dev; | |
cefa9993 | 1227 | strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ); |
8a8efa22 AW |
1228 | err = __netpoll_setup(np); |
1229 | if (err) { | |
1230 | kfree(np); | |
1231 | goto out; | |
f6dc31a8 | 1232 | } |
8a8efa22 AW |
1233 | slave->np = np; |
1234 | out: | |
1235 | return err; | |
1236 | } | |
1237 | static inline void slave_disable_netpoll(struct slave *slave) | |
1238 | { | |
1239 | struct netpoll *np = slave->np; | |
1240 | ||
1241 | if (!np) | |
1242 | return; | |
1243 | ||
1244 | slave->np = NULL; | |
1245 | synchronize_rcu_bh(); | |
1246 | __netpoll_cleanup(np); | |
1247 | kfree(np); | |
1248 | } | |
1249 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1250 | { | |
1251 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1252 | return false; | |
1253 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1254 | return false; | |
1255 | return true; | |
f6dc31a8 WC |
1256 | } |
1257 | ||
1258 | static void bond_poll_controller(struct net_device *bond_dev) | |
1259 | { | |
8a8efa22 AW |
1260 | } |
1261 | ||
1262 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1263 | { | |
c2355e1a NH |
1264 | struct slave *slave; |
1265 | int i; | |
1266 | ||
8a8efa22 AW |
1267 | bond_for_each_slave(bond, slave, i) |
1268 | if (IS_UP(slave->dev)) | |
1269 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1270 | } |
f6dc31a8 WC |
1271 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1272 | { | |
1273 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1274 | |
1275 | read_lock(&bond->lock); | |
1276 | __bond_netpoll_cleanup(bond); | |
1277 | read_unlock(&bond->lock); | |
1278 | } | |
1279 | ||
1280 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1281 | { | |
1282 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1283 | struct slave *slave; |
8a8efa22 | 1284 | int i, err = 0; |
f6dc31a8 WC |
1285 | |
1286 | read_lock(&bond->lock); | |
f6dc31a8 | 1287 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1288 | err = slave_enable_netpoll(slave); |
1289 | if (err) { | |
1290 | __bond_netpoll_cleanup(bond); | |
1291 | break; | |
f6dc31a8 WC |
1292 | } |
1293 | } | |
1294 | read_unlock(&bond->lock); | |
8a8efa22 | 1295 | return err; |
f6dc31a8 WC |
1296 | } |
1297 | ||
8a8efa22 AW |
1298 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1299 | { | |
1300 | return bond->dev->npinfo; | |
1301 | } | |
f6dc31a8 | 1302 | |
8a8efa22 AW |
1303 | #else |
1304 | static inline int slave_enable_netpoll(struct slave *slave) | |
1305 | { | |
1306 | return 0; | |
1307 | } | |
1308 | static inline void slave_disable_netpoll(struct slave *slave) | |
1309 | { | |
1310 | } | |
f6dc31a8 WC |
1311 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1312 | { | |
1313 | } | |
f6dc31a8 WC |
1314 | #endif |
1315 | ||
1da177e4 LT |
1316 | /*---------------------------------- IOCTL ----------------------------------*/ |
1317 | ||
4ad072c9 AB |
1318 | static int bond_sethwaddr(struct net_device *bond_dev, |
1319 | struct net_device *slave_dev) | |
1da177e4 | 1320 | { |
5a03cdb7 HE |
1321 | pr_debug("bond_dev=%p\n", bond_dev); |
1322 | pr_debug("slave_dev=%p\n", slave_dev); | |
1323 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1324 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1325 | return 0; | |
1326 | } | |
1327 | ||
c8f44aff MM |
1328 | static netdev_features_t bond_fix_features(struct net_device *dev, |
1329 | netdev_features_t features) | |
8531c5ff | 1330 | { |
8531c5ff | 1331 | struct slave *slave; |
b2a103e6 | 1332 | struct bonding *bond = netdev_priv(dev); |
c8f44aff | 1333 | netdev_features_t mask; |
8e3babcd | 1334 | int i; |
8531c5ff | 1335 | |
b2a103e6 | 1336 | read_lock(&bond->lock); |
b63365a2 | 1337 | |
b2a103e6 MM |
1338 | if (!bond->first_slave) { |
1339 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1340 | features |= NETIF_F_VLAN_CHALLENGED; | |
1341 | goto out; | |
1342 | } | |
b63365a2 | 1343 | |
b2a103e6 | 1344 | mask = features; |
b63365a2 | 1345 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1346 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1347 | |
54ef3137 | 1348 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1349 | features = netdev_increment_features(features, |
1350 | slave->dev->features, | |
b2a103e6 MM |
1351 | mask); |
1352 | } | |
1353 | ||
1354 | out: | |
1355 | read_unlock(&bond->lock); | |
1356 | return features; | |
1357 | } | |
1358 | ||
62f2a3a4 MM |
1359 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1360 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1361 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1362 | |
1363 | static void bond_compute_features(struct bonding *bond) | |
1364 | { | |
1365 | struct slave *slave; | |
1366 | struct net_device *bond_dev = bond->dev; | |
c8f44aff | 1367 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
b2a103e6 MM |
1368 | unsigned short max_hard_header_len = ETH_HLEN; |
1369 | int i; | |
1370 | ||
1371 | read_lock(&bond->lock); | |
1372 | ||
1373 | if (!bond->first_slave) | |
1374 | goto done; | |
1375 | ||
1376 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1377 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1378 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1379 | ||
54ef3137 JV |
1380 | if (slave->dev->hard_header_len > max_hard_header_len) |
1381 | max_hard_header_len = slave->dev->hard_header_len; | |
1382 | } | |
8531c5ff | 1383 | |
b63365a2 | 1384 | done: |
b2a103e6 | 1385 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1386 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff | 1387 | |
b2a103e6 MM |
1388 | read_unlock(&bond->lock); |
1389 | ||
1390 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1391 | } |
1392 | ||
872254dd MS |
1393 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1394 | struct net_device *slave_dev) | |
1395 | { | |
454d7c9b | 1396 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1397 | |
00829823 | 1398 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1399 | |
1400 | bond_dev->type = slave_dev->type; | |
1401 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1402 | bond_dev->addr_len = slave_dev->addr_len; | |
1403 | ||
1404 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1405 | slave_dev->addr_len); | |
d90a162a | 1406 | bond->setup_by_slave = 1; |
872254dd MS |
1407 | } |
1408 | ||
5b2c4dd2 | 1409 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1410 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1411 | */ |
1412 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1413 | struct slave *slave, |
1414 | struct bonding *bond) | |
5b2c4dd2 | 1415 | { |
2d7011ca | 1416 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1417 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1418 | skb->pkt_type != PACKET_BROADCAST && |
1419 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1420 | return false; |
5b2c4dd2 JP |
1421 | return true; |
1422 | } | |
1423 | return false; | |
1424 | } | |
1425 | ||
8a4eb573 | 1426 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1427 | { |
8a4eb573 | 1428 | struct sk_buff *skb = *pskb; |
f1c1775a | 1429 | struct slave *slave; |
0bd80dad | 1430 | struct bonding *bond; |
4d97480b MH |
1431 | void (*recv_probe)(struct sk_buff *, struct bonding *, |
1432 | struct slave *); | |
5b2c4dd2 | 1433 | |
8a4eb573 JP |
1434 | skb = skb_share_check(skb, GFP_ATOMIC); |
1435 | if (unlikely(!skb)) | |
1436 | return RX_HANDLER_CONSUMED; | |
1437 | ||
1438 | *pskb = skb; | |
5b2c4dd2 | 1439 | |
35d48903 JP |
1440 | slave = bond_slave_get_rcu(skb->dev); |
1441 | bond = slave->bond; | |
0bd80dad JP |
1442 | |
1443 | if (bond->params.arp_interval) | |
f1c1775a | 1444 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1445 | |
4d97480b MH |
1446 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1447 | if (recv_probe) { | |
3aba891d JP |
1448 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); |
1449 | ||
1450 | if (likely(nskb)) { | |
4d97480b | 1451 | recv_probe(nskb, bond, slave); |
3aba891d JP |
1452 | dev_kfree_skb(nskb); |
1453 | } | |
1454 | } | |
1455 | ||
0bd80dad | 1456 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1457 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1458 | } |
1459 | ||
35d48903 | 1460 | skb->dev = bond->dev; |
5b2c4dd2 | 1461 | |
0bd80dad | 1462 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1463 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1464 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1465 | |
541ac7c9 CG |
1466 | if (unlikely(skb_cow_head(skb, |
1467 | skb->data - skb_mac_header(skb)))) { | |
1468 | kfree_skb(skb); | |
8a4eb573 | 1469 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1470 | } |
35d48903 | 1471 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1472 | } |
1473 | ||
8a4eb573 | 1474 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1475 | } |
1476 | ||
1da177e4 | 1477 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1478 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1479 | { |
454d7c9b | 1480 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1481 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1482 | struct slave *new_slave = NULL; |
22bedad3 | 1483 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1484 | struct sockaddr addr; |
1485 | int link_reporting; | |
1da177e4 LT |
1486 | int res = 0; |
1487 | ||
552709d5 | 1488 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1489 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1490 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1491 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1492 | } |
1493 | ||
1da177e4 LT |
1494 | /* already enslaved */ |
1495 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1496 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1497 | return -EBUSY; |
1498 | } | |
1499 | ||
1500 | /* vlan challenged mutual exclusion */ | |
1501 | /* no need to lock since we're protected by rtnl_lock */ | |
1502 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1503 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
cc0e4070 | 1504 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
1505 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1506 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1507 | return -EPERM; |
1508 | } else { | |
a4aee5c8 JP |
1509 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1510 | bond_dev->name, slave_dev->name, | |
1511 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1512 | } |
1513 | } else { | |
5a03cdb7 | 1514 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1515 | } |
1516 | ||
217df670 JV |
1517 | /* |
1518 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1519 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1520 | * the current ifenslave will set the interface down prior to |
1521 | * enslaving it; the old ifenslave will not. | |
1522 | */ | |
1523 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1524 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1525 | slave_dev->name); |
1526 | res = -EPERM; | |
1527 | goto err_undo_flags; | |
1528 | } | |
1da177e4 | 1529 | |
872254dd MS |
1530 | /* set bonding device ether type by slave - bonding netdevices are |
1531 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1532 | * there is a need to override some of the type dependent attribs/funcs. | |
1533 | * | |
1534 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1535 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1536 | */ | |
1537 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1538 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1539 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1540 | bond_dev->name, |
1541 | bond_dev->type, slave_dev->type); | |
75c78500 | 1542 | |
3ca5b404 JP |
1543 | res = netdev_bonding_change(bond_dev, |
1544 | NETDEV_PRE_TYPE_CHANGE); | |
1545 | res = notifier_to_errno(res); | |
1546 | if (res) { | |
1547 | pr_err("%s: refused to change device type\n", | |
1548 | bond_dev->name); | |
1549 | res = -EBUSY; | |
1550 | goto err_undo_flags; | |
1551 | } | |
75c78500 | 1552 | |
32a806c1 | 1553 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1554 | dev_uc_flush(bond_dev); |
22bedad3 | 1555 | dev_mc_flush(bond_dev); |
32a806c1 | 1556 | |
e36b9d16 MS |
1557 | if (slave_dev->type != ARPHRD_ETHER) |
1558 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1559 | else { |
e36b9d16 | 1560 | ether_setup(bond_dev); |
550fd08c NH |
1561 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1562 | } | |
75c78500 | 1563 | |
93d9b7d7 JP |
1564 | netdev_bonding_change(bond_dev, |
1565 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1566 | } |
872254dd | 1567 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1568 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1569 | slave_dev->name, | |
1570 | slave_dev->type, bond_dev->type); | |
1571 | res = -EINVAL; | |
1572 | goto err_undo_flags; | |
872254dd MS |
1573 | } |
1574 | ||
eb7cc59a | 1575 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1576 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1577 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1578 | bond_dev->name); | |
3915c1e8 JV |
1579 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1580 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1581 | 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", |
1582 | bond_dev->name); | |
2ab82852 MS |
1583 | res = -EOPNOTSUPP; |
1584 | goto err_undo_flags; | |
1585 | } | |
1da177e4 LT |
1586 | } |
1587 | ||
8d8fc29d AW |
1588 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1589 | ||
c20811a7 JP |
1590 | /* If this is the first slave, then we need to set the master's hardware |
1591 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1592 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1593 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1594 | slave_dev->addr_len); | |
1595 | ||
1596 | ||
243cb4e5 | 1597 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1598 | if (!new_slave) { |
1599 | res = -ENOMEM; | |
1600 | goto err_undo_flags; | |
1601 | } | |
1602 | ||
bb1d9123 AG |
1603 | /* |
1604 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1605 | * is set via sysfs or module option if desired. | |
1606 | */ | |
1607 | new_slave->queue_id = 0; | |
1608 | ||
b15ba0fb JP |
1609 | /* Save slave's original mtu and then set it to match the bond */ |
1610 | new_slave->original_mtu = slave_dev->mtu; | |
1611 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1612 | if (res) { | |
1613 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1614 | goto err_free; | |
1615 | } | |
1616 | ||
217df670 JV |
1617 | /* |
1618 | * Save slave's original ("permanent") mac address for modes | |
1619 | * that need it, and for restoring it upon release, and then | |
1620 | * set it to the master's address | |
1621 | */ | |
1622 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1623 | |
dd957c57 | 1624 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1625 | /* |
1626 | * Set slave to master's mac address. The application already | |
1627 | * set the master's mac address to that of the first slave | |
1628 | */ | |
1629 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1630 | addr.sa_family = slave_dev->type; | |
1631 | res = dev_set_mac_address(slave_dev, &addr); | |
1632 | if (res) { | |
5a03cdb7 | 1633 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1634 | goto err_restore_mtu; |
2ab82852 | 1635 | } |
217df670 | 1636 | } |
1da177e4 | 1637 | |
1765a575 | 1638 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1639 | if (res) { |
1765a575 | 1640 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1641 | goto err_restore_mac; |
c2edacf8 | 1642 | } |
5b2c4dd2 | 1643 | |
217df670 JV |
1644 | /* open the slave since the application closed it */ |
1645 | res = dev_open(slave_dev); | |
1646 | if (res) { | |
3d632c3f | 1647 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1648 | goto err_unset_master; |
1da177e4 LT |
1649 | } |
1650 | ||
35d48903 | 1651 | new_slave->bond = bond; |
1da177e4 | 1652 | new_slave->dev = slave_dev; |
0b680e75 | 1653 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1654 | |
58402054 | 1655 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1656 | /* bond_alb_init_slave() must be called before all other stages since |
1657 | * it might fail and we do not want to have to undo everything | |
1658 | */ | |
1659 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1660 | if (res) |
569f0c4d | 1661 | goto err_close; |
1da177e4 LT |
1662 | } |
1663 | ||
1664 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1665 | * master's promisc (and mc) settings only if it becomes the | |
1666 | * curr_active_slave, and that is taken care of later when calling | |
1667 | * bond_change_active() | |
1668 | */ | |
1669 | if (!USES_PRIMARY(bond->params.mode)) { | |
1670 | /* set promiscuity level to new slave */ | |
1671 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1672 | res = dev_set_promiscuity(slave_dev, 1); |
1673 | if (res) | |
1674 | goto err_close; | |
1da177e4 LT |
1675 | } |
1676 | ||
1677 | /* set allmulti level to new slave */ | |
1678 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1679 | res = dev_set_allmulti(slave_dev, 1); |
1680 | if (res) | |
1681 | goto err_close; | |
1da177e4 LT |
1682 | } |
1683 | ||
b9e40857 | 1684 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1685 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1686 | netdev_for_each_mc_addr(ha, bond_dev) |
1687 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1688 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1689 | } |
1690 | ||
1691 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1692 | /* add lacpdu mc addr to mc list */ | |
1693 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1694 | ||
22bedad3 | 1695 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1696 | } |
1697 | ||
1698 | bond_add_vlans_on_slave(bond, slave_dev); | |
1699 | ||
1700 | write_lock_bh(&bond->lock); | |
1701 | ||
1702 | bond_attach_slave(bond, new_slave); | |
1703 | ||
1704 | new_slave->delay = 0; | |
1705 | new_slave->link_failure_count = 0; | |
1706 | ||
3915c1e8 JV |
1707 | write_unlock_bh(&bond->lock); |
1708 | ||
b2a103e6 MM |
1709 | bond_compute_features(bond); |
1710 | ||
3915c1e8 JV |
1711 | read_lock(&bond->lock); |
1712 | ||
f5b2b966 JV |
1713 | new_slave->last_arp_rx = jiffies; |
1714 | ||
1da177e4 LT |
1715 | if (bond->params.miimon && !bond->params.use_carrier) { |
1716 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1717 | ||
1718 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1719 | /* | |
1720 | * miimon is set but a bonded network driver | |
1721 | * does not support ETHTOOL/MII and | |
1722 | * arp_interval is not set. Note: if | |
1723 | * use_carrier is enabled, we will never go | |
1724 | * here (because netif_carrier is always | |
1725 | * supported); thus, we don't need to change | |
1726 | * the messages for netif_carrier. | |
1727 | */ | |
a4aee5c8 | 1728 | 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 | 1729 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1730 | } else if (link_reporting == -1) { |
1731 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1732 | 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", |
1733 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1734 | } |
1735 | } | |
1736 | ||
1737 | /* check for initial state */ | |
1738 | if (!bond->params.miimon || | |
1739 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1740 | if (bond->params.updelay) { | |
a4aee5c8 | 1741 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1742 | new_slave->link = BOND_LINK_BACK; |
1743 | new_slave->delay = bond->params.updelay; | |
1744 | } else { | |
a4aee5c8 | 1745 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1746 | new_slave->link = BOND_LINK_UP; |
1747 | } | |
1748 | new_slave->jiffies = jiffies; | |
1749 | } else { | |
a4aee5c8 | 1750 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1751 | new_slave->link = BOND_LINK_DOWN; |
1752 | } | |
1753 | ||
98f41f69 | 1754 | bond_update_speed_duplex(new_slave); |
1da177e4 LT |
1755 | |
1756 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1757 | /* if there is a primary slave, remember it */ | |
a549952a | 1758 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1759 | bond->primary_slave = new_slave; |
a549952a JP |
1760 | bond->force_primary = true; |
1761 | } | |
1da177e4 LT |
1762 | } |
1763 | ||
3915c1e8 JV |
1764 | write_lock_bh(&bond->curr_slave_lock); |
1765 | ||
1da177e4 LT |
1766 | switch (bond->params.mode) { |
1767 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1768 | bond_set_slave_inactive_flags(new_slave); |
1769 | bond_select_active_slave(bond); | |
1da177e4 LT |
1770 | break; |
1771 | case BOND_MODE_8023AD: | |
1772 | /* in 802.3ad mode, the internal mechanism | |
1773 | * will activate the slaves in the selected | |
1774 | * aggregator | |
1775 | */ | |
1776 | bond_set_slave_inactive_flags(new_slave); | |
1777 | /* if this is the first slave */ | |
1778 | if (bond->slave_cnt == 1) { | |
1779 | SLAVE_AD_INFO(new_slave).id = 1; | |
1780 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1781 | * can be called only after the mac address of the bond is set | |
1782 | */ | |
56d00c67 | 1783 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1784 | } else { |
1785 | SLAVE_AD_INFO(new_slave).id = | |
1786 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1787 | } | |
1788 | ||
1789 | bond_3ad_bind_slave(new_slave); | |
1790 | break; | |
1791 | case BOND_MODE_TLB: | |
1792 | case BOND_MODE_ALB: | |
e30bc066 | 1793 | bond_set_active_slave(new_slave); |
059fe7a5 | 1794 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1795 | bond_select_active_slave(bond); |
1da177e4 LT |
1796 | break; |
1797 | default: | |
5a03cdb7 | 1798 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1799 | |
1800 | /* always active in trunk mode */ | |
e30bc066 | 1801 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1802 | |
1803 | /* In trunking mode there is little meaning to curr_active_slave | |
1804 | * anyway (it holds no special properties of the bond device), | |
1805 | * so we can change it without calling change_active_interface() | |
1806 | */ | |
3d632c3f | 1807 | if (!bond->curr_active_slave) |
1da177e4 | 1808 | bond->curr_active_slave = new_slave; |
3d632c3f | 1809 | |
1da177e4 LT |
1810 | break; |
1811 | } /* switch(bond_mode) */ | |
1812 | ||
3915c1e8 JV |
1813 | write_unlock_bh(&bond->curr_slave_lock); |
1814 | ||
ff59c456 JV |
1815 | bond_set_carrier(bond); |
1816 | ||
f6dc31a8 | 1817 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1818 | slave_dev->npinfo = bond_netpoll_info(bond); |
1819 | if (slave_dev->npinfo) { | |
1820 | if (slave_enable_netpoll(new_slave)) { | |
1821 | read_unlock(&bond->lock); | |
1822 | pr_info("Error, %s: master_dev is using netpoll, " | |
1823 | "but new slave device does not support netpoll.\n", | |
1824 | bond_dev->name); | |
1825 | res = -EBUSY; | |
1826 | goto err_close; | |
1827 | } | |
f6dc31a8 WC |
1828 | } |
1829 | #endif | |
8a8efa22 | 1830 | |
3915c1e8 | 1831 | read_unlock(&bond->lock); |
1da177e4 | 1832 | |
b76cdba9 MW |
1833 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1834 | if (res) | |
569f0c4d | 1835 | goto err_close; |
b76cdba9 | 1836 | |
35d48903 JP |
1837 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1838 | new_slave); | |
1839 | if (res) { | |
1840 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1841 | goto err_dest_symlinks; | |
1842 | } | |
1843 | ||
a4aee5c8 JP |
1844 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1845 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1846 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1847 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1848 | |
1849 | /* enslave is successful */ | |
1850 | return 0; | |
1851 | ||
1852 | /* Undo stages on error */ | |
35d48903 JP |
1853 | err_dest_symlinks: |
1854 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1855 | ||
1da177e4 LT |
1856 | err_close: |
1857 | dev_close(slave_dev); | |
1858 | ||
569f0c4d | 1859 | err_unset_master: |
1765a575 | 1860 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1861 | |
1da177e4 | 1862 | err_restore_mac: |
dd957c57 | 1863 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1864 | /* XXX TODO - fom follow mode needs to change master's |
1865 | * MAC if this slave's MAC is in use by the bond, or at | |
1866 | * least print a warning. | |
1867 | */ | |
2ab82852 MS |
1868 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1869 | addr.sa_family = slave_dev->type; | |
1870 | dev_set_mac_address(slave_dev, &addr); | |
1871 | } | |
1da177e4 | 1872 | |
b15ba0fb JP |
1873 | err_restore_mtu: |
1874 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1875 | ||
1da177e4 LT |
1876 | err_free: |
1877 | kfree(new_slave); | |
1878 | ||
1879 | err_undo_flags: | |
b2a103e6 | 1880 | bond_compute_features(bond); |
3d632c3f | 1881 | |
1da177e4 LT |
1882 | return res; |
1883 | } | |
1884 | ||
1885 | /* | |
1886 | * Try to release the slave device <slave> from the bond device <master> | |
1887 | * It is legal to access curr_active_slave without a lock because all the function | |
1888 | * is write-locked. | |
1889 | * | |
1890 | * The rules for slave state should be: | |
1891 | * for Active/Backup: | |
1892 | * Active stays on all backups go down | |
1893 | * for Bonded connections: | |
1894 | * The first up interface should be left on and all others downed. | |
1895 | */ | |
a77b5325 | 1896 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1897 | { |
454d7c9b | 1898 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1899 | struct slave *slave, *oldcurrent; |
1900 | struct sockaddr addr; | |
c8f44aff | 1901 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1902 | |
1903 | /* slave is not a slave or master is not master of this slave */ | |
1904 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1905 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1906 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1907 | bond_dev->name, slave_dev->name); |
1908 | return -EINVAL; | |
1909 | } | |
1910 | ||
e843fa50 | 1911 | block_netpoll_tx(); |
daf9209b | 1912 | netdev_bonding_change(bond_dev, NETDEV_RELEASE); |
1da177e4 LT |
1913 | write_lock_bh(&bond->lock); |
1914 | ||
1915 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1916 | if (!slave) { | |
1917 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1918 | pr_info("%s: %s not enslaved\n", |
1919 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1920 | write_unlock_bh(&bond->lock); |
e843fa50 | 1921 | unblock_netpoll_tx(); |
1da177e4 LT |
1922 | return -EINVAL; |
1923 | } | |
1924 | ||
35d48903 JP |
1925 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1926 | * for this slave anymore. | |
1927 | */ | |
1928 | netdev_rx_handler_unregister(slave_dev); | |
1929 | write_unlock_bh(&bond->lock); | |
1930 | synchronize_net(); | |
1931 | write_lock_bh(&bond->lock); | |
1932 | ||
3915c1e8 | 1933 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1934 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1935 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1936 | 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", |
1937 | bond_dev->name, slave_dev->name, | |
1938 | slave->perm_hwaddr, | |
1939 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1940 | } |
1941 | ||
1942 | /* Inform AD package of unbinding of slave. */ | |
1943 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1944 | /* must be called before the slave is | |
1945 | * detached from the list | |
1946 | */ | |
1947 | bond_3ad_unbind_slave(slave); | |
1948 | } | |
1949 | ||
a4aee5c8 JP |
1950 | pr_info("%s: releasing %s interface %s\n", |
1951 | bond_dev->name, | |
e30bc066 | 1952 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 1953 | slave_dev->name); |
1da177e4 LT |
1954 | |
1955 | oldcurrent = bond->curr_active_slave; | |
1956 | ||
1957 | bond->current_arp_slave = NULL; | |
1958 | ||
1959 | /* release the slave from its bond */ | |
1960 | bond_detach_slave(bond, slave); | |
1961 | ||
3d632c3f | 1962 | if (bond->primary_slave == slave) |
1da177e4 | 1963 | bond->primary_slave = NULL; |
1da177e4 | 1964 | |
3d632c3f | 1965 | if (oldcurrent == slave) |
1da177e4 | 1966 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1967 | |
58402054 | 1968 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1969 | /* Must be called only after the slave has been |
1970 | * detached from the list and the curr_active_slave | |
1971 | * has been cleared (if our_slave == old_current), | |
1972 | * but before a new active slave is selected. | |
1973 | */ | |
2543331d | 1974 | write_unlock_bh(&bond->lock); |
1da177e4 | 1975 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1976 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1977 | } |
1978 | ||
059fe7a5 JV |
1979 | if (oldcurrent == slave) { |
1980 | /* | |
1981 | * Note that we hold RTNL over this sequence, so there | |
1982 | * is no concern that another slave add/remove event | |
1983 | * will interfere. | |
1984 | */ | |
1985 | write_unlock_bh(&bond->lock); | |
1986 | read_lock(&bond->lock); | |
1987 | write_lock_bh(&bond->curr_slave_lock); | |
1988 | ||
1da177e4 LT |
1989 | bond_select_active_slave(bond); |
1990 | ||
059fe7a5 JV |
1991 | write_unlock_bh(&bond->curr_slave_lock); |
1992 | read_unlock(&bond->lock); | |
1993 | write_lock_bh(&bond->lock); | |
1994 | } | |
1995 | ||
1da177e4 | 1996 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1997 | bond_set_carrier(bond); |
1998 | ||
1da177e4 LT |
1999 | /* if the last slave was removed, zero the mac address |
2000 | * of the master so it will be set by the application | |
2001 | * to the mac address of the first slave | |
2002 | */ | |
2003 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2004 | ||
cc0e4070 | 2005 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2006 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2007 | bond_dev->name, bond_dev->name); | |
2008 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2009 | bond_dev->name); | |
1da177e4 | 2010 | } |
1da177e4 LT |
2011 | } |
2012 | ||
2013 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2014 | unblock_netpoll_tx(); |
1da177e4 | 2015 | |
b2a103e6 MM |
2016 | bond_compute_features(bond); |
2017 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2018 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2019 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2020 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2021 | ||
b76cdba9 MW |
2022 | /* must do this from outside any spinlocks */ |
2023 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2024 | ||
1da177e4 LT |
2025 | bond_del_vlans_from_slave(bond, slave_dev); |
2026 | ||
2027 | /* If the mode USES_PRIMARY, then we should only remove its | |
2028 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2029 | * already taken care of above when we detached the slave | |
2030 | */ | |
2031 | if (!USES_PRIMARY(bond->params.mode)) { | |
2032 | /* unset promiscuity level from slave */ | |
3d632c3f | 2033 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2034 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2035 | |
2036 | /* unset allmulti level from slave */ | |
3d632c3f | 2037 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2038 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2039 | |
2040 | /* flush master's mc_list from slave */ | |
b9e40857 | 2041 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2042 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2043 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2044 | } |
2045 | ||
1765a575 | 2046 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2047 | |
8a8efa22 | 2048 | slave_disable_netpoll(slave); |
f6dc31a8 | 2049 | |
1da177e4 LT |
2050 | /* close slave before restoring its mac address */ |
2051 | dev_close(slave_dev); | |
2052 | ||
3915c1e8 | 2053 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2054 | /* restore original ("permanent") mac address */ |
2055 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2056 | addr.sa_family = slave_dev->type; | |
2057 | dev_set_mac_address(slave_dev, &addr); | |
2058 | } | |
1da177e4 | 2059 | |
b15ba0fb JP |
2060 | dev_set_mtu(slave_dev, slave->original_mtu); |
2061 | ||
2d7011ca | 2062 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2063 | |
2064 | kfree(slave); | |
2065 | ||
2066 | return 0; /* deletion OK */ | |
2067 | } | |
2068 | ||
d90a162a | 2069 | /* |
dadaa10b | 2070 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2071 | * Must be under rtnl_lock when this function is called. |
2072 | */ | |
26d8ee75 | 2073 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2074 | struct net_device *slave_dev) | |
d90a162a | 2075 | { |
454d7c9b | 2076 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2077 | int ret; |
2078 | ||
2079 | ret = bond_release(bond_dev, slave_dev); | |
2080 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2081 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2082 | pr_info("%s: destroying bond %s.\n", |
2083 | bond_dev->name, bond_dev->name); | |
9e71626c | 2084 | unregister_netdevice(bond_dev); |
d90a162a MS |
2085 | } |
2086 | return ret; | |
2087 | } | |
2088 | ||
1da177e4 LT |
2089 | /* |
2090 | * This function releases all slaves. | |
2091 | */ | |
2092 | static int bond_release_all(struct net_device *bond_dev) | |
2093 | { | |
454d7c9b | 2094 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2095 | struct slave *slave; |
2096 | struct net_device *slave_dev; | |
2097 | struct sockaddr addr; | |
2098 | ||
2099 | write_lock_bh(&bond->lock); | |
2100 | ||
ff59c456 JV |
2101 | netif_carrier_off(bond_dev); |
2102 | ||
3d632c3f | 2103 | if (bond->slave_cnt == 0) |
1da177e4 | 2104 | goto out; |
1da177e4 LT |
2105 | |
2106 | bond->current_arp_slave = NULL; | |
2107 | bond->primary_slave = NULL; | |
2108 | bond_change_active_slave(bond, NULL); | |
2109 | ||
2110 | while ((slave = bond->first_slave) != NULL) { | |
2111 | /* Inform AD package of unbinding of slave | |
2112 | * before slave is detached from the list. | |
2113 | */ | |
3d632c3f | 2114 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2115 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2116 | |
2117 | slave_dev = slave->dev; | |
2118 | bond_detach_slave(bond, slave); | |
2119 | ||
2543331d JV |
2120 | /* now that the slave is detached, unlock and perform |
2121 | * all the undo steps that should not be called from | |
2122 | * within a lock. | |
2123 | */ | |
2124 | write_unlock_bh(&bond->lock); | |
2125 | ||
35d48903 JP |
2126 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2127 | * be called for this slave anymore. | |
2128 | */ | |
2129 | netdev_rx_handler_unregister(slave_dev); | |
2130 | synchronize_net(); | |
2131 | ||
58402054 | 2132 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2133 | /* must be called only after the slave |
2134 | * has been detached from the list | |
2135 | */ | |
2136 | bond_alb_deinit_slave(bond, slave); | |
2137 | } | |
2138 | ||
b76cdba9 | 2139 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2140 | bond_del_vlans_from_slave(bond, slave_dev); |
2141 | ||
2142 | /* If the mode USES_PRIMARY, then we should only remove its | |
2143 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2144 | * already taken care of above when we detached the slave | |
2145 | */ | |
2146 | if (!USES_PRIMARY(bond->params.mode)) { | |
2147 | /* unset promiscuity level from slave */ | |
3d632c3f | 2148 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2149 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2150 | |
2151 | /* unset allmulti level from slave */ | |
3d632c3f | 2152 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2153 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2154 | |
2155 | /* flush master's mc_list from slave */ | |
b9e40857 | 2156 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2157 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2158 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2159 | } |
2160 | ||
1765a575 | 2161 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2162 | |
8a8efa22 AW |
2163 | slave_disable_netpoll(slave); |
2164 | ||
1da177e4 LT |
2165 | /* close slave before restoring its mac address */ |
2166 | dev_close(slave_dev); | |
2167 | ||
dd957c57 | 2168 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2169 | /* restore original ("permanent") mac address*/ |
2170 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2171 | addr.sa_family = slave_dev->type; | |
2172 | dev_set_mac_address(slave_dev, &addr); | |
2173 | } | |
1da177e4 | 2174 | |
1da177e4 LT |
2175 | kfree(slave); |
2176 | ||
2177 | /* re-acquire the lock before getting the next slave */ | |
2178 | write_lock_bh(&bond->lock); | |
2179 | } | |
2180 | ||
2181 | /* zero the mac address of the master so it will be | |
2182 | * set by the application to the mac address of the | |
2183 | * first slave | |
2184 | */ | |
2185 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2186 | ||
cc0e4070 | 2187 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2188 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2189 | bond_dev->name, bond_dev->name); | |
2190 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2191 | bond_dev->name); | |
1da177e4 LT |
2192 | } |
2193 | ||
a4aee5c8 | 2194 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2195 | |
2196 | out: | |
2197 | write_unlock_bh(&bond->lock); | |
b2a103e6 MM |
2198 | |
2199 | bond_compute_features(bond); | |
2200 | ||
1da177e4 LT |
2201 | return 0; |
2202 | } | |
2203 | ||
2204 | /* | |
2205 | * This function changes the active slave to slave <slave_dev>. | |
2206 | * It returns -EINVAL in the following cases. | |
2207 | * - <slave_dev> is not found in the list. | |
2208 | * - There is not active slave now. | |
2209 | * - <slave_dev> is already active. | |
2210 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2211 | * - <slave_dev> is not running. | |
3d632c3f SH |
2212 | * In these cases, this function does nothing. |
2213 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2214 | */ |
2215 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2216 | { | |
454d7c9b | 2217 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2218 | struct slave *old_active = NULL; |
2219 | struct slave *new_active = NULL; | |
2220 | int res = 0; | |
2221 | ||
3d632c3f | 2222 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2223 | return -EINVAL; |
1da177e4 LT |
2224 | |
2225 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2226 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2227 | return -EINVAL; |
1da177e4 | 2228 | |
059fe7a5 | 2229 | read_lock(&bond->lock); |
1da177e4 | 2230 | |
059fe7a5 | 2231 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2232 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2233 | read_unlock(&bond->curr_slave_lock); |
2234 | ||
1da177e4 LT |
2235 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2236 | ||
2237 | /* | |
2238 | * Changing to the current active: do nothing; return success. | |
2239 | */ | |
2240 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2241 | read_unlock(&bond->lock); |
1da177e4 LT |
2242 | return 0; |
2243 | } | |
2244 | ||
2245 | if ((new_active) && | |
2246 | (old_active) && | |
2247 | (new_active->link == BOND_LINK_UP) && | |
2248 | IS_UP(new_active->dev)) { | |
e843fa50 | 2249 | block_netpoll_tx(); |
059fe7a5 | 2250 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2251 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2252 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2253 | unblock_netpoll_tx(); |
3d632c3f | 2254 | } else |
1da177e4 | 2255 | res = -EINVAL; |
1da177e4 | 2256 | |
059fe7a5 | 2257 | read_unlock(&bond->lock); |
1da177e4 LT |
2258 | |
2259 | return res; | |
2260 | } | |
2261 | ||
1da177e4 LT |
2262 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2263 | { | |
454d7c9b | 2264 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2265 | |
2266 | info->bond_mode = bond->params.mode; | |
2267 | info->miimon = bond->params.miimon; | |
2268 | ||
6603a6f2 | 2269 | read_lock(&bond->lock); |
1da177e4 | 2270 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2271 | read_unlock(&bond->lock); |
1da177e4 LT |
2272 | |
2273 | return 0; | |
2274 | } | |
2275 | ||
2276 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2277 | { | |
454d7c9b | 2278 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2279 | struct slave *slave; |
689c96cc | 2280 | int i, res = -ENODEV; |
1da177e4 | 2281 | |
6603a6f2 | 2282 | read_lock(&bond->lock); |
1da177e4 LT |
2283 | |
2284 | bond_for_each_slave(bond, slave, i) { | |
2285 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2286 | res = 0; |
2287 | strcpy(info->slave_name, slave->dev->name); | |
2288 | info->link = slave->link; | |
e30bc066 | 2289 | info->state = bond_slave_state(slave); |
689c96cc | 2290 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2291 | break; |
2292 | } | |
2293 | } | |
2294 | ||
6603a6f2 | 2295 | read_unlock(&bond->lock); |
1da177e4 | 2296 | |
689c96cc | 2297 | return res; |
1da177e4 LT |
2298 | } |
2299 | ||
2300 | /*-------------------------------- Monitoring -------------------------------*/ | |
2301 | ||
1da177e4 | 2302 | |
f0c76d61 JV |
2303 | static int bond_miimon_inspect(struct bonding *bond) |
2304 | { | |
2305 | struct slave *slave; | |
2306 | int i, link_state, commit = 0; | |
41f89100 JP |
2307 | bool ignore_updelay; |
2308 | ||
2309 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2310 | |
2311 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2312 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2313 | |
f0c76d61 | 2314 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2315 | |
2316 | switch (slave->link) { | |
f0c76d61 JV |
2317 | case BOND_LINK_UP: |
2318 | if (link_state) | |
2319 | continue; | |
1da177e4 | 2320 | |
f0c76d61 JV |
2321 | slave->link = BOND_LINK_FAIL; |
2322 | slave->delay = bond->params.downdelay; | |
2323 | if (slave->delay) { | |
a4aee5c8 JP |
2324 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2325 | bond->dev->name, | |
2326 | (bond->params.mode == | |
2327 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2328 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2329 | "active " : "backup ") : "", |
2330 | slave->dev->name, | |
2331 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2332 | } |
f0c76d61 JV |
2333 | /*FALLTHRU*/ |
2334 | case BOND_LINK_FAIL: | |
2335 | if (link_state) { | |
2336 | /* | |
2337 | * recovered before downdelay expired | |
2338 | */ | |
2339 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2340 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2341 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2342 | bond->dev->name, | |
2343 | (bond->params.downdelay - slave->delay) * | |
2344 | bond->params.miimon, | |
2345 | slave->dev->name); | |
f0c76d61 | 2346 | continue; |
1da177e4 | 2347 | } |
f0c76d61 JV |
2348 | |
2349 | if (slave->delay <= 0) { | |
2350 | slave->new_link = BOND_LINK_DOWN; | |
2351 | commit++; | |
2352 | continue; | |
1da177e4 | 2353 | } |
1da177e4 | 2354 | |
f0c76d61 JV |
2355 | slave->delay--; |
2356 | break; | |
2357 | ||
2358 | case BOND_LINK_DOWN: | |
2359 | if (!link_state) | |
2360 | continue; | |
2361 | ||
2362 | slave->link = BOND_LINK_BACK; | |
2363 | slave->delay = bond->params.updelay; | |
2364 | ||
2365 | if (slave->delay) { | |
a4aee5c8 JP |
2366 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2367 | bond->dev->name, slave->dev->name, | |
2368 | ignore_updelay ? 0 : | |
2369 | bond->params.updelay * | |
2370 | bond->params.miimon); | |
f0c76d61 JV |
2371 | } |
2372 | /*FALLTHRU*/ | |
2373 | case BOND_LINK_BACK: | |
2374 | if (!link_state) { | |
2375 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2376 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2377 | bond->dev->name, | |
2378 | (bond->params.updelay - slave->delay) * | |
2379 | bond->params.miimon, | |
2380 | slave->dev->name); | |
f0c76d61 JV |
2381 | |
2382 | continue; | |
2383 | } | |
2384 | ||
41f89100 JP |
2385 | if (ignore_updelay) |
2386 | slave->delay = 0; | |
2387 | ||
f0c76d61 JV |
2388 | if (slave->delay <= 0) { |
2389 | slave->new_link = BOND_LINK_UP; | |
2390 | commit++; | |
41f89100 | 2391 | ignore_updelay = false; |
f0c76d61 | 2392 | continue; |
1da177e4 | 2393 | } |
f0c76d61 JV |
2394 | |
2395 | slave->delay--; | |
1da177e4 | 2396 | break; |
f0c76d61 JV |
2397 | } |
2398 | } | |
1da177e4 | 2399 | |
f0c76d61 JV |
2400 | return commit; |
2401 | } | |
1da177e4 | 2402 | |
f0c76d61 JV |
2403 | static void bond_miimon_commit(struct bonding *bond) |
2404 | { | |
2405 | struct slave *slave; | |
2406 | int i; | |
2407 | ||
2408 | bond_for_each_slave(bond, slave, i) { | |
2409 | switch (slave->new_link) { | |
2410 | case BOND_LINK_NOCHANGE: | |
2411 | continue; | |
1da177e4 | 2412 | |
f0c76d61 JV |
2413 | case BOND_LINK_UP: |
2414 | slave->link = BOND_LINK_UP; | |
2415 | slave->jiffies = jiffies; | |
2416 | ||
2417 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2418 | /* prevent it from being the active one */ | |
e30bc066 | 2419 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2420 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2421 | /* make it immediately active */ | |
e30bc066 | 2422 | bond_set_active_slave(slave); |
f0c76d61 JV |
2423 | } else if (slave != bond->primary_slave) { |
2424 | /* prevent it from being the active one */ | |
e30bc066 | 2425 | bond_set_backup_slave(slave); |
1da177e4 | 2426 | } |
1da177e4 | 2427 | |
546add79 KPO |
2428 | bond_update_speed_duplex(slave); |
2429 | ||
5d30530e | 2430 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2431 | bond->dev->name, slave->dev->name, |
2432 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2433 | |
f0c76d61 JV |
2434 | /* notify ad that the link status has changed */ |
2435 | if (bond->params.mode == BOND_MODE_8023AD) | |
2436 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2437 | |
58402054 | 2438 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2439 | bond_alb_handle_link_change(bond, slave, |
2440 | BOND_LINK_UP); | |
1da177e4 | 2441 | |
f0c76d61 JV |
2442 | if (!bond->curr_active_slave || |
2443 | (slave == bond->primary_slave)) | |
2444 | goto do_failover; | |
1da177e4 | 2445 | |
f0c76d61 | 2446 | continue; |
059fe7a5 | 2447 | |
f0c76d61 | 2448 | case BOND_LINK_DOWN: |
fba4acda JV |
2449 | if (slave->link_failure_count < UINT_MAX) |
2450 | slave->link_failure_count++; | |
2451 | ||
f0c76d61 | 2452 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2453 | |
f0c76d61 JV |
2454 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2455 | bond->params.mode == BOND_MODE_8023AD) | |
2456 | bond_set_slave_inactive_flags(slave); | |
2457 | ||
a4aee5c8 JP |
2458 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2459 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2460 | |
2461 | if (bond->params.mode == BOND_MODE_8023AD) | |
2462 | bond_3ad_handle_link_change(slave, | |
2463 | BOND_LINK_DOWN); | |
2464 | ||
ae63e808 | 2465 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2466 | bond_alb_handle_link_change(bond, slave, |
2467 | BOND_LINK_DOWN); | |
2468 | ||
2469 | if (slave == bond->curr_active_slave) | |
2470 | goto do_failover; | |
2471 | ||
2472 | continue; | |
2473 | ||
2474 | default: | |
a4aee5c8 | 2475 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2476 | bond->dev->name, slave->new_link, |
2477 | slave->dev->name); | |
2478 | slave->new_link = BOND_LINK_NOCHANGE; | |
2479 | ||
2480 | continue; | |
2481 | } | |
2482 | ||
2483 | do_failover: | |
2484 | ASSERT_RTNL(); | |
e843fa50 | 2485 | block_netpoll_tx(); |
f0c76d61 JV |
2486 | write_lock_bh(&bond->curr_slave_lock); |
2487 | bond_select_active_slave(bond); | |
2488 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2489 | unblock_netpoll_tx(); |
f0c76d61 JV |
2490 | } |
2491 | ||
2492 | bond_set_carrier(bond); | |
1da177e4 LT |
2493 | } |
2494 | ||
0b0eef66 JV |
2495 | /* |
2496 | * bond_mii_monitor | |
2497 | * | |
2498 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2499 | * inspection, then (if inspection indicates something needs to be done) |
2500 | * an acquisition of appropriate locks followed by a commit phase to | |
2501 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2502 | */ |
2503 | void bond_mii_monitor(struct work_struct *work) | |
2504 | { | |
2505 | struct bonding *bond = container_of(work, struct bonding, | |
2506 | mii_work.work); | |
ad246c99 | 2507 | bool should_notify_peers = false; |
e6d265e8 | 2508 | unsigned long delay; |
0b0eef66 JV |
2509 | |
2510 | read_lock(&bond->lock); | |
e6d265e8 JV |
2511 | |
2512 | delay = msecs_to_jiffies(bond->params.miimon); | |
f0c76d61 JV |
2513 | |
2514 | if (bond->slave_cnt == 0) | |
2515 | goto re_arm; | |
b59f9f74 | 2516 | |
ad246c99 BH |
2517 | should_notify_peers = bond_should_notify_peers(bond); |
2518 | ||
f0c76d61 | 2519 | if (bond_miimon_inspect(bond)) { |
0b0eef66 | 2520 | read_unlock(&bond->lock); |
e6d265e8 JV |
2521 | |
2522 | /* Race avoidance with bond_close cancel of workqueue */ | |
2523 | if (!rtnl_trylock()) { | |
2524 | read_lock(&bond->lock); | |
2525 | delay = 1; | |
2526 | should_notify_peers = false; | |
2527 | goto re_arm; | |
2528 | } | |
2529 | ||
0b0eef66 | 2530 | read_lock(&bond->lock); |
f0c76d61 JV |
2531 | |
2532 | bond_miimon_commit(bond); | |
2533 | ||
5655662d JV |
2534 | read_unlock(&bond->lock); |
2535 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2536 | read_lock(&bond->lock); | |
0b0eef66 JV |
2537 | } |
2538 | ||
f0c76d61 | 2539 | re_arm: |
e6d265e8 JV |
2540 | if (bond->params.miimon) |
2541 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2542 | ||
0b0eef66 | 2543 | read_unlock(&bond->lock); |
ad246c99 BH |
2544 | |
2545 | if (should_notify_peers) { | |
e6d265e8 JV |
2546 | if (!rtnl_trylock()) { |
2547 | read_lock(&bond->lock); | |
2548 | bond->send_peer_notif++; | |
2549 | read_unlock(&bond->lock); | |
2550 | return; | |
2551 | } | |
ad246c99 BH |
2552 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
2553 | rtnl_unlock(); | |
2554 | } | |
0b0eef66 | 2555 | } |
c3ade5ca | 2556 | |
d3bb52b0 | 2557 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2558 | { |
0883beca | 2559 | struct vlan_entry *vlan; |
f5b2b966 JV |
2560 | |
2561 | if (ip == bond->master_ip) | |
2562 | return 1; | |
2563 | ||
0883beca | 2564 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2565 | if (ip == vlan->vlan_ip) |
2566 | return 1; | |
2567 | } | |
2568 | ||
2569 | return 0; | |
2570 | } | |
2571 | ||
c3ade5ca JV |
2572 | /* |
2573 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2574 | * switches in VLAN mode (especially if ports are configured as | |
2575 | * "native" to a VLAN) might not pass non-tagged frames. | |
2576 | */ | |
d3bb52b0 | 2577 | 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 |
2578 | { |
2579 | struct sk_buff *skb; | |
2580 | ||
5a03cdb7 | 2581 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2582 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2583 | |
c3ade5ca JV |
2584 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2585 | NULL, slave_dev->dev_addr, NULL); | |
2586 | ||
2587 | if (!skb) { | |
a4aee5c8 | 2588 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2589 | return; |
2590 | } | |
2591 | if (vlan_id) { | |
2592 | skb = vlan_put_tag(skb, vlan_id); | |
2593 | if (!skb) { | |
a4aee5c8 | 2594 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2595 | return; |
2596 | } | |
2597 | } | |
2598 | arp_xmit(skb); | |
2599 | } | |
2600 | ||
2601 | ||
1da177e4 LT |
2602 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2603 | { | |
b23dd4fe | 2604 | int i, vlan_id; |
d3bb52b0 | 2605 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2606 | struct vlan_entry *vlan; |
c3ade5ca | 2607 | struct net_device *vlan_dev; |
c3ade5ca | 2608 | struct rtable *rt; |
1da177e4 | 2609 | |
6b780567 MW |
2610 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2611 | if (!targets[i]) | |
5a31bec0 | 2612 | break; |
5a03cdb7 | 2613 | pr_debug("basa: target %x\n", targets[i]); |
cc0e4070 | 2614 | if (!bond_vlan_used(bond)) { |
5a03cdb7 | 2615 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2616 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2617 | bond->master_ip, 0); | |
2618 | continue; | |
2619 | } | |
2620 | ||
2621 | /* | |
2622 | * If VLANs are configured, we do a route lookup to | |
2623 | * determine which VLAN interface would be used, so we | |
2624 | * can tag the ARP with the proper VLAN tag. | |
2625 | */ | |
78fbfd8a DM |
2626 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2627 | RTO_ONLINK, 0); | |
b23dd4fe | 2628 | if (IS_ERR(rt)) { |
c3ade5ca | 2629 | if (net_ratelimit()) { |
a4aee5c8 | 2630 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2631 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2632 | } |
2633 | continue; | |
2634 | } | |
2635 | ||
2636 | /* | |
2637 | * This target is not on a VLAN | |
2638 | */ | |
d8d1f30b | 2639 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2640 | ip_rt_put(rt); |
5a03cdb7 | 2641 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2642 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2643 | bond->master_ip, 0); | |
2644 | continue; | |
2645 | } | |
2646 | ||
2647 | vlan_id = 0; | |
0883beca | 2648 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
2649 | rcu_read_lock(); |
2650 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
2651 | vlan->vlan_id); | |
2652 | rcu_read_unlock(); | |
d8d1f30b | 2653 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2654 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2655 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2656 | vlan_dev->name, vlan_id); |
2657 | break; | |
2658 | } | |
2659 | } | |
2660 | ||
2661 | if (vlan_id) { | |
ed4b9f80 | 2662 | ip_rt_put(rt); |
c3ade5ca JV |
2663 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2664 | vlan->vlan_ip, vlan_id); | |
2665 | continue; | |
2666 | } | |
2667 | ||
2668 | if (net_ratelimit()) { | |
a4aee5c8 | 2669 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2670 | bond->dev->name, &targets[i], |
d8d1f30b | 2671 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2672 | } |
ed4b9f80 | 2673 | ip_rt_put(rt); |
c3ade5ca JV |
2674 | } |
2675 | } | |
2676 | ||
d3bb52b0 | 2677 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2678 | { |
2679 | int i; | |
d3bb52b0 | 2680 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2681 | |
f5b2b966 | 2682 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2683 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2684 | &sip, &tip, i, &targets[i], |
2685 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2686 | if (sip == targets[i]) { |
2687 | if (bond_has_this_ip(bond, tip)) | |
2688 | slave->last_arp_rx = jiffies; | |
2689 | return; | |
2690 | } | |
2691 | } | |
2692 | } | |
2693 | ||
3aba891d JP |
2694 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2695 | struct slave *slave) | |
f5b2b966 JV |
2696 | { |
2697 | struct arphdr *arp; | |
f5b2b966 | 2698 | unsigned char *arp_ptr; |
d3bb52b0 | 2699 | __be32 sip, tip; |
f5b2b966 | 2700 | |
3aba891d JP |
2701 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2702 | return; | |
f5b2b966 | 2703 | |
f5b2b966 JV |
2704 | read_lock(&bond->lock); |
2705 | ||
3aba891d JP |
2706 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2707 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2708 | |
3aba891d | 2709 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2710 | goto out_unlock; |
2711 | ||
d0a92be0 | 2712 | arp = arp_hdr(skb); |
3aba891d | 2713 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2714 | skb->pkt_type == PACKET_OTHERHOST || |
2715 | skb->pkt_type == PACKET_LOOPBACK || | |
2716 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2717 | arp->ar_pro != htons(ETH_P_IP) || | |
2718 | arp->ar_pln != 4) | |
2719 | goto out_unlock; | |
2720 | ||
2721 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2722 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2723 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2724 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2725 | memcpy(&tip, arp_ptr, 4); |
2726 | ||
5a03cdb7 | 2727 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2728 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2729 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2730 | &sip, &tip); | |
f5b2b966 JV |
2731 | |
2732 | /* | |
2733 | * Backup slaves won't see the ARP reply, but do come through | |
2734 | * here for each ARP probe (so we swap the sip/tip to validate | |
2735 | * the probe). In a "redundant switch, common router" type of | |
2736 | * configuration, the ARP probe will (hopefully) travel from | |
2737 | * the active, through one switch, the router, then the other | |
2738 | * switch before reaching the backup. | |
2739 | */ | |
e30bc066 | 2740 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2741 | bond_validate_arp(bond, slave, sip, tip); |
2742 | else | |
2743 | bond_validate_arp(bond, slave, tip, sip); | |
2744 | ||
2745 | out_unlock: | |
2746 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2747 | } |
2748 | ||
1da177e4 LT |
2749 | /* |
2750 | * this function is called regularly to monitor each slave's link | |
2751 | * ensuring that traffic is being sent and received when arp monitoring | |
2752 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2753 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2754 | * arp monitoring in active backup mode. | |
2755 | */ | |
1b76b316 | 2756 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2757 | { |
1b76b316 JV |
2758 | struct bonding *bond = container_of(work, struct bonding, |
2759 | arp_work.work); | |
1da177e4 LT |
2760 | struct slave *slave, *oldcurrent; |
2761 | int do_failover = 0; | |
2762 | int delta_in_ticks; | |
2763 | int i; | |
2764 | ||
2765 | read_lock(&bond->lock); | |
2766 | ||
5ce0da8f | 2767 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2768 | |
3d632c3f | 2769 | if (bond->slave_cnt == 0) |
1da177e4 | 2770 | goto re_arm; |
1da177e4 LT |
2771 | |
2772 | read_lock(&bond->curr_slave_lock); | |
2773 | oldcurrent = bond->curr_active_slave; | |
2774 | read_unlock(&bond->curr_slave_lock); | |
2775 | ||
2776 | /* see if any of the previous devices are up now (i.e. they have | |
2777 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2778 | * the picture unless it is null. also, slave->jiffies is not needed | |
2779 | * here because we send an arp on each slave and give a slave as | |
2780 | * long as it needs to get the tx/rx within the delta. | |
2781 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2782 | * so it can wait | |
2783 | */ | |
2784 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2785 | unsigned long trans_start = dev_trans_start(slave->dev); |
2786 | ||
1da177e4 | 2787 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2788 | if (time_in_range(jiffies, |
2789 | trans_start - delta_in_ticks, | |
2790 | trans_start + delta_in_ticks) && | |
2791 | time_in_range(jiffies, | |
2792 | slave->dev->last_rx - delta_in_ticks, | |
2793 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2794 | |
2795 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2796 | bond_set_active_slave(slave); |
1da177e4 LT |
2797 | |
2798 | /* primary_slave has no meaning in round-robin | |
2799 | * mode. the window of a slave being up and | |
2800 | * curr_active_slave being null after enslaving | |
2801 | * is closed. | |
2802 | */ | |
2803 | if (!oldcurrent) { | |
a4aee5c8 JP |
2804 | pr_info("%s: link status definitely up for interface %s, ", |
2805 | bond->dev->name, | |
2806 | slave->dev->name); | |
1da177e4 LT |
2807 | do_failover = 1; |
2808 | } else { | |
a4aee5c8 JP |
2809 | pr_info("%s: interface %s is now up\n", |
2810 | bond->dev->name, | |
2811 | slave->dev->name); | |
1da177e4 LT |
2812 | } |
2813 | } | |
2814 | } else { | |
2815 | /* slave->link == BOND_LINK_UP */ | |
2816 | ||
2817 | /* not all switches will respond to an arp request | |
2818 | * when the source ip is 0, so don't take the link down | |
2819 | * if we don't know our ip yet | |
2820 | */ | |
cb32f2a0 JB |
2821 | if (!time_in_range(jiffies, |
2822 | trans_start - delta_in_ticks, | |
2823 | trans_start + 2 * delta_in_ticks) || | |
2824 | !time_in_range(jiffies, | |
2825 | slave->dev->last_rx - delta_in_ticks, | |
2826 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2827 | |
2828 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2829 | bond_set_backup_slave(slave); |
1da177e4 | 2830 | |
3d632c3f | 2831 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2832 | slave->link_failure_count++; |
1da177e4 | 2833 | |
a4aee5c8 JP |
2834 | pr_info("%s: interface %s is now down.\n", |
2835 | bond->dev->name, | |
2836 | slave->dev->name); | |
1da177e4 | 2837 | |
3d632c3f | 2838 | if (slave == oldcurrent) |
1da177e4 | 2839 | do_failover = 1; |
1da177e4 LT |
2840 | } |
2841 | } | |
2842 | ||
2843 | /* note: if switch is in round-robin mode, all links | |
2844 | * must tx arp to ensure all links rx an arp - otherwise | |
2845 | * links may oscillate or not come up at all; if switch is | |
2846 | * in something like xor mode, there is nothing we can | |
2847 | * do - all replies will be rx'ed on same link causing slaves | |
2848 | * to be unstable during low/no traffic periods | |
2849 | */ | |
3d632c3f | 2850 | if (IS_UP(slave->dev)) |
1da177e4 | 2851 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2852 | } |
2853 | ||
2854 | if (do_failover) { | |
e843fa50 | 2855 | block_netpoll_tx(); |
059fe7a5 | 2856 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2857 | |
2858 | bond_select_active_slave(bond); | |
2859 | ||
059fe7a5 | 2860 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2861 | unblock_netpoll_tx(); |
1da177e4 LT |
2862 | } |
2863 | ||
2864 | re_arm: | |
e6d265e8 | 2865 | if (bond->params.arp_interval) |
1b76b316 | 2866 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 2867 | |
1da177e4 LT |
2868 | read_unlock(&bond->lock); |
2869 | } | |
2870 | ||
2871 | /* | |
b2220cad JV |
2872 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2873 | * changes. Sets new_link in slaves to specify what action should take | |
2874 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2875 | * to link states must be committed. | |
2876 | * | |
2877 | * Called with bond->lock held for read. | |
1da177e4 | 2878 | */ |
b2220cad | 2879 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2880 | { |
1da177e4 | 2881 | struct slave *slave; |
b2220cad | 2882 | int i, commit = 0; |
cb32f2a0 | 2883 | unsigned long trans_start; |
1da177e4 | 2884 | |
b2220cad JV |
2885 | bond_for_each_slave(bond, slave, i) { |
2886 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2887 | |
b2220cad | 2888 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2889 | if (time_in_range(jiffies, |
2890 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2891 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2892 | ||
b2220cad JV |
2893 | slave->new_link = BOND_LINK_UP; |
2894 | commit++; | |
2895 | } | |
1da177e4 | 2896 | |
b2220cad JV |
2897 | continue; |
2898 | } | |
1da177e4 | 2899 | |
b2220cad JV |
2900 | /* |
2901 | * Give slaves 2*delta after being enslaved or made | |
2902 | * active. This avoids bouncing, as the last receive | |
2903 | * times need a full ARP monitor cycle to be updated. | |
2904 | */ | |
cb32f2a0 JB |
2905 | if (time_in_range(jiffies, |
2906 | slave->jiffies - delta_in_ticks, | |
2907 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
2908 | continue; |
2909 | ||
2910 | /* | |
2911 | * Backup slave is down if: | |
2912 | * - No current_arp_slave AND | |
2913 | * - more than 3*delta since last receive AND | |
2914 | * - the bond has an IP address | |
2915 | * | |
2916 | * Note: a non-null current_arp_slave indicates | |
2917 | * the curr_active_slave went down and we are | |
2918 | * searching for a new one; under this condition | |
2919 | * we only take the curr_active_slave down - this | |
2920 | * gives each slave a chance to tx/rx traffic | |
2921 | * before being taken out | |
2922 | */ | |
e30bc066 | 2923 | if (!bond_is_active_slave(slave) && |
b2220cad | 2924 | !bond->current_arp_slave && |
cb32f2a0 JB |
2925 | !time_in_range(jiffies, |
2926 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2927 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
2928 | ||
b2220cad JV |
2929 | slave->new_link = BOND_LINK_DOWN; |
2930 | commit++; | |
2931 | } | |
2932 | ||
2933 | /* | |
2934 | * Active slave is down if: | |
2935 | * - more than 2*delta since transmitting OR | |
2936 | * - (more than 2*delta since receive AND | |
2937 | * the bond has an IP address) | |
2938 | */ | |
cb32f2a0 | 2939 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2940 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
2941 | (!time_in_range(jiffies, |
2942 | trans_start - delta_in_ticks, | |
2943 | trans_start + 2 * delta_in_ticks) || | |
2944 | !time_in_range(jiffies, | |
2945 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2946 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
2947 | ||
b2220cad JV |
2948 | slave->new_link = BOND_LINK_DOWN; |
2949 | commit++; | |
2950 | } | |
1da177e4 LT |
2951 | } |
2952 | ||
b2220cad JV |
2953 | return commit; |
2954 | } | |
1da177e4 | 2955 | |
b2220cad JV |
2956 | /* |
2957 | * Called to commit link state changes noted by inspection step of | |
2958 | * active-backup mode ARP monitor. | |
2959 | * | |
2960 | * Called with RTNL and bond->lock for read. | |
2961 | */ | |
2962 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2963 | { | |
2964 | struct slave *slave; | |
2965 | int i; | |
cb32f2a0 | 2966 | unsigned long trans_start; |
1da177e4 | 2967 | |
b2220cad JV |
2968 | bond_for_each_slave(bond, slave, i) { |
2969 | switch (slave->new_link) { | |
2970 | case BOND_LINK_NOCHANGE: | |
2971 | continue; | |
ff59c456 | 2972 | |
b2220cad | 2973 | case BOND_LINK_UP: |
cb32f2a0 | 2974 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 2975 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
2976 | time_in_range(jiffies, |
2977 | trans_start - delta_in_ticks, | |
2978 | trans_start + delta_in_ticks)) || | |
b9f60253 | 2979 | bond->curr_active_slave != slave) { |
b2220cad | 2980 | slave->link = BOND_LINK_UP; |
b2220cad JV |
2981 | bond->current_arp_slave = NULL; |
2982 | ||
a4aee5c8 | 2983 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 2984 | bond->dev->name, slave->dev->name); |
b2220cad | 2985 | |
b9f60253 JP |
2986 | if (!bond->curr_active_slave || |
2987 | (slave == bond->primary_slave)) | |
2988 | goto do_failover; | |
1da177e4 | 2989 | |
b9f60253 | 2990 | } |
1da177e4 | 2991 | |
b9f60253 | 2992 | continue; |
1da177e4 | 2993 | |
b2220cad JV |
2994 | case BOND_LINK_DOWN: |
2995 | if (slave->link_failure_count < UINT_MAX) | |
2996 | slave->link_failure_count++; | |
2997 | ||
2998 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 2999 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3000 | |
a4aee5c8 | 3001 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3002 | bond->dev->name, slave->dev->name); |
b2220cad | 3003 | |
b9f60253 | 3004 | if (slave == bond->curr_active_slave) { |
b2220cad | 3005 | bond->current_arp_slave = NULL; |
b9f60253 | 3006 | goto do_failover; |
1da177e4 | 3007 | } |
b9f60253 JP |
3008 | |
3009 | continue; | |
b2220cad JV |
3010 | |
3011 | default: | |
a4aee5c8 | 3012 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3013 | bond->dev->name, slave->new_link, |
3014 | slave->dev->name); | |
b9f60253 | 3015 | continue; |
1da177e4 | 3016 | } |
1da177e4 | 3017 | |
b9f60253 JP |
3018 | do_failover: |
3019 | ASSERT_RTNL(); | |
e843fa50 | 3020 | block_netpoll_tx(); |
b2220cad | 3021 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3022 | bond_select_active_slave(bond); |
b2220cad | 3023 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3024 | unblock_netpoll_tx(); |
b2220cad | 3025 | } |
1da177e4 | 3026 | |
b2220cad JV |
3027 | bond_set_carrier(bond); |
3028 | } | |
1da177e4 | 3029 | |
b2220cad JV |
3030 | /* |
3031 | * Send ARP probes for active-backup mode ARP monitor. | |
3032 | * | |
3033 | * Called with bond->lock held for read. | |
3034 | */ | |
3035 | static void bond_ab_arp_probe(struct bonding *bond) | |
3036 | { | |
3037 | struct slave *slave; | |
3038 | int i; | |
1da177e4 | 3039 | |
b2220cad | 3040 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3041 | |
b2220cad | 3042 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3043 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3044 | bond->current_arp_slave->dev->name, | |
3045 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3046 | |
b2220cad JV |
3047 | if (bond->curr_active_slave) { |
3048 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3049 | read_unlock(&bond->curr_slave_lock); | |
3050 | return; | |
3051 | } | |
1da177e4 | 3052 | |
b2220cad | 3053 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3054 | |
b2220cad JV |
3055 | /* if we don't have a curr_active_slave, search for the next available |
3056 | * backup slave from the current_arp_slave and make it the candidate | |
3057 | * for becoming the curr_active_slave | |
3058 | */ | |
1da177e4 | 3059 | |
b2220cad JV |
3060 | if (!bond->current_arp_slave) { |
3061 | bond->current_arp_slave = bond->first_slave; | |
3062 | if (!bond->current_arp_slave) | |
3063 | return; | |
3064 | } | |
1da177e4 | 3065 | |
b2220cad | 3066 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3067 | |
b2220cad JV |
3068 | /* search for next candidate */ |
3069 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3070 | if (IS_UP(slave->dev)) { | |
3071 | slave->link = BOND_LINK_BACK; | |
3072 | bond_set_slave_active_flags(slave); | |
3073 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3074 | slave->jiffies = jiffies; |
b2220cad JV |
3075 | bond->current_arp_slave = slave; |
3076 | break; | |
1da177e4 LT |
3077 | } |
3078 | ||
b2220cad JV |
3079 | /* if the link state is up at this point, we |
3080 | * mark it down - this can happen if we have | |
3081 | * simultaneous link failures and | |
3082 | * reselect_active_interface doesn't make this | |
3083 | * one the current slave so it is still marked | |
3084 | * up when it is actually down | |
1da177e4 | 3085 | */ |
b2220cad JV |
3086 | if (slave->link == BOND_LINK_UP) { |
3087 | slave->link = BOND_LINK_DOWN; | |
3088 | if (slave->link_failure_count < UINT_MAX) | |
3089 | slave->link_failure_count++; | |
1da177e4 | 3090 | |
b2220cad JV |
3091 | bond_set_slave_inactive_flags(slave); |
3092 | ||
a4aee5c8 JP |
3093 | pr_info("%s: backup interface %s is now down.\n", |
3094 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3095 | } |
b2220cad JV |
3096 | } |
3097 | } | |
1da177e4 | 3098 | |
b2220cad JV |
3099 | void bond_activebackup_arp_mon(struct work_struct *work) |
3100 | { | |
3101 | struct bonding *bond = container_of(work, struct bonding, | |
3102 | arp_work.work); | |
ad246c99 | 3103 | bool should_notify_peers = false; |
b2220cad | 3104 | int delta_in_ticks; |
1da177e4 | 3105 | |
b2220cad | 3106 | read_lock(&bond->lock); |
1da177e4 | 3107 | |
b2220cad | 3108 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3109 | |
b2220cad JV |
3110 | if (bond->slave_cnt == 0) |
3111 | goto re_arm; | |
3112 | ||
ad246c99 BH |
3113 | should_notify_peers = bond_should_notify_peers(bond); |
3114 | ||
b2220cad JV |
3115 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3116 | read_unlock(&bond->lock); | |
e6d265e8 JV |
3117 | |
3118 | /* Race avoidance with bond_close flush of workqueue */ | |
3119 | if (!rtnl_trylock()) { | |
3120 | read_lock(&bond->lock); | |
3121 | delta_in_ticks = 1; | |
3122 | should_notify_peers = false; | |
3123 | goto re_arm; | |
3124 | } | |
3125 | ||
b2220cad JV |
3126 | read_lock(&bond->lock); |
3127 | ||
3128 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3129 | ||
3130 | read_unlock(&bond->lock); | |
3131 | rtnl_unlock(); | |
3132 | read_lock(&bond->lock); | |
1da177e4 LT |
3133 | } |
3134 | ||
b2220cad JV |
3135 | bond_ab_arp_probe(bond); |
3136 | ||
1da177e4 | 3137 | re_arm: |
e6d265e8 | 3138 | if (bond->params.arp_interval) |
1b76b316 | 3139 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 3140 | |
1da177e4 | 3141 | read_unlock(&bond->lock); |
ad246c99 BH |
3142 | |
3143 | if (should_notify_peers) { | |
e6d265e8 JV |
3144 | if (!rtnl_trylock()) { |
3145 | read_lock(&bond->lock); | |
3146 | bond->send_peer_notif++; | |
3147 | read_unlock(&bond->lock); | |
3148 | return; | |
3149 | } | |
ad246c99 BH |
3150 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
3151 | rtnl_unlock(); | |
3152 | } | |
1da177e4 LT |
3153 | } |
3154 | ||
1da177e4 LT |
3155 | /*-------------------------- netdev event handling --------------------------*/ |
3156 | ||
3157 | /* | |
3158 | * Change device name | |
3159 | */ | |
3160 | static int bond_event_changename(struct bonding *bond) | |
3161 | { | |
1da177e4 LT |
3162 | bond_remove_proc_entry(bond); |
3163 | bond_create_proc_entry(bond); | |
7e083840 | 3164 | |
f073c7ca TI |
3165 | bond_debug_reregister(bond); |
3166 | ||
1da177e4 LT |
3167 | return NOTIFY_DONE; |
3168 | } | |
3169 | ||
3d632c3f SH |
3170 | static int bond_master_netdev_event(unsigned long event, |
3171 | struct net_device *bond_dev) | |
1da177e4 | 3172 | { |
454d7c9b | 3173 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3174 | |
3175 | switch (event) { | |
3176 | case NETDEV_CHANGENAME: | |
3177 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3178 | default: |
3179 | break; | |
3180 | } | |
3181 | ||
3182 | return NOTIFY_DONE; | |
3183 | } | |
3184 | ||
3d632c3f SH |
3185 | static int bond_slave_netdev_event(unsigned long event, |
3186 | struct net_device *slave_dev) | |
1da177e4 LT |
3187 | { |
3188 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3189 | struct bonding *bond = netdev_priv(bond_dev); |
98f41f69 | 3190 | struct slave *slave = NULL; |
1da177e4 LT |
3191 | |
3192 | switch (event) { | |
3193 | case NETDEV_UNREGISTER: | |
3194 | if (bond_dev) { | |
1284cd3a JV |
3195 | if (bond->setup_by_slave) |
3196 | bond_release_and_destroy(bond_dev, slave_dev); | |
3197 | else | |
3198 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3199 | } |
3200 | break; | |
98f41f69 | 3201 | case NETDEV_UP: |
1da177e4 | 3202 | case NETDEV_CHANGE: |
98f41f69 WP |
3203 | slave = bond_get_slave_by_dev(bond, slave_dev); |
3204 | if (slave) { | |
3205 | u32 old_speed = slave->speed; | |
3206 | u8 old_duplex = slave->duplex; | |
17d04500 | 3207 | |
98f41f69 | 3208 | bond_update_speed_duplex(slave); |
17d04500 | 3209 | |
98f41f69 | 3210 | if (bond->params.mode == BOND_MODE_8023AD) { |
17d04500 JV |
3211 | if (old_speed != slave->speed) |
3212 | bond_3ad_adapter_speed_changed(slave); | |
3213 | if (old_duplex != slave->duplex) | |
3214 | bond_3ad_adapter_duplex_changed(slave); | |
3215 | } | |
3216 | } | |
3217 | ||
1da177e4 LT |
3218 | break; |
3219 | case NETDEV_DOWN: | |
3220 | /* | |
3221 | * ... Or is it this? | |
3222 | */ | |
3223 | break; | |
3224 | case NETDEV_CHANGEMTU: | |
3225 | /* | |
3226 | * TODO: Should slaves be allowed to | |
3227 | * independently alter their MTU? For | |
3228 | * an active-backup bond, slaves need | |
3229 | * not be the same type of device, so | |
3230 | * MTUs may vary. For other modes, | |
3231 | * slaves arguably should have the | |
3232 | * same MTUs. To do this, we'd need to | |
3233 | * take over the slave's change_mtu | |
3234 | * function for the duration of their | |
3235 | * servitude. | |
3236 | */ | |
3237 | break; | |
3238 | case NETDEV_CHANGENAME: | |
3239 | /* | |
3240 | * TODO: handle changing the primary's name | |
3241 | */ | |
3242 | break; | |
8531c5ff AK |
3243 | case NETDEV_FEAT_CHANGE: |
3244 | bond_compute_features(bond); | |
3245 | break; | |
1da177e4 LT |
3246 | default: |
3247 | break; | |
3248 | } | |
3249 | ||
3250 | return NOTIFY_DONE; | |
3251 | } | |
3252 | ||
3253 | /* | |
3254 | * bond_netdev_event: handle netdev notifier chain events. | |
3255 | * | |
3256 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3257 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3258 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3259 | * dev_probe_lock). | |
3260 | */ | |
3d632c3f SH |
3261 | static int bond_netdev_event(struct notifier_block *this, |
3262 | unsigned long event, void *ptr) | |
1da177e4 LT |
3263 | { |
3264 | struct net_device *event_dev = (struct net_device *)ptr; | |
3265 | ||
5a03cdb7 | 3266 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3267 | event_dev ? event_dev->name : "None", |
3268 | event); | |
1da177e4 | 3269 | |
0b680e75 JV |
3270 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3271 | return NOTIFY_DONE; | |
3272 | ||
1da177e4 | 3273 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3274 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3275 | return bond_master_netdev_event(event, event_dev); |
3276 | } | |
3277 | ||
3278 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3279 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3280 | return bond_slave_netdev_event(event, event_dev); |
3281 | } | |
3282 | ||
3283 | return NOTIFY_DONE; | |
3284 | } | |
3285 | ||
c3ade5ca JV |
3286 | /* |
3287 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3288 | * | |
3289 | * We keep track of device IPs primarily to use as source addresses in | |
3290 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3291 | * | |
3292 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3293 | */ | |
3294 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3295 | { | |
3296 | struct in_ifaddr *ifa = ptr; | |
3297 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3298 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3299 | struct bonding *bond; |
3300 | struct vlan_entry *vlan; | |
c3ade5ca | 3301 | |
917fbdb3 HSP |
3302 | /* we only care about primary address */ |
3303 | if(ifa->ifa_flags & IFA_F_SECONDARY) | |
3304 | return NOTIFY_DONE; | |
3305 | ||
ec87fd3b | 3306 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3307 | if (bond->dev == event_dev) { |
3308 | switch (event) { | |
3309 | case NETDEV_UP: | |
3310 | bond->master_ip = ifa->ifa_local; | |
3311 | return NOTIFY_OK; | |
3312 | case NETDEV_DOWN: | |
917fbdb3 | 3313 | bond->master_ip = 0; |
c3ade5ca JV |
3314 | return NOTIFY_OK; |
3315 | default: | |
3316 | return NOTIFY_DONE; | |
3317 | } | |
3318 | } | |
3319 | ||
0883beca | 3320 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
3321 | vlan_dev = __vlan_find_dev_deep(bond->dev, |
3322 | vlan->vlan_id); | |
c3ade5ca JV |
3323 | if (vlan_dev == event_dev) { |
3324 | switch (event) { | |
3325 | case NETDEV_UP: | |
3326 | vlan->vlan_ip = ifa->ifa_local; | |
3327 | return NOTIFY_OK; | |
3328 | case NETDEV_DOWN: | |
917fbdb3 | 3329 | vlan->vlan_ip = 0; |
c3ade5ca JV |
3330 | return NOTIFY_OK; |
3331 | default: | |
3332 | return NOTIFY_DONE; | |
3333 | } | |
3334 | } | |
3335 | } | |
3336 | } | |
3337 | return NOTIFY_DONE; | |
3338 | } | |
3339 | ||
1da177e4 LT |
3340 | static struct notifier_block bond_netdev_notifier = { |
3341 | .notifier_call = bond_netdev_event, | |
3342 | }; | |
3343 | ||
c3ade5ca JV |
3344 | static struct notifier_block bond_inetaddr_notifier = { |
3345 | .notifier_call = bond_inetaddr_event, | |
3346 | }; | |
3347 | ||
169a3e66 JV |
3348 | /*---------------------------- Hashing Policies -----------------------------*/ |
3349 | ||
6f6652be JV |
3350 | /* |
3351 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3352 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3353 | */ | |
a361c83c | 3354 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3355 | { |
3356 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3357 | struct iphdr *iph = ip_hdr(skb); | |
3358 | ||
f14c4e4e | 3359 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3360 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3361 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3362 | } |
3363 | ||
d3da6831 | 3364 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3365 | } |
3366 | ||
169a3e66 | 3367 | /* |
59c51591 | 3368 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3369 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3370 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3371 | */ | |
a361c83c | 3372 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3373 | { |
3374 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3375 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3376 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3377 | int layer4_xor = 0; |
3378 | ||
f14c4e4e | 3379 | if (skb->protocol == htons(ETH_P_IP)) { |
56f8a75c | 3380 | if (!ip_is_fragment(iph) && |
169a3e66 JV |
3381 | (iph->protocol == IPPROTO_TCP || |
3382 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3383 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3384 | } |
3385 | return (layer4_xor ^ | |
3386 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3387 | ||
3388 | } | |
3389 | ||
d3da6831 | 3390 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3391 | } |
3392 | ||
3393 | /* | |
3394 | * Hash for the output device based upon layer 2 data | |
3395 | */ | |
a361c83c | 3396 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3397 | { |
3398 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3399 | ||
d3da6831 | 3400 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3401 | } |
3402 | ||
1da177e4 LT |
3403 | /*-------------------------- Device entry points ----------------------------*/ |
3404 | ||
3405 | static int bond_open(struct net_device *bond_dev) | |
3406 | { | |
454d7c9b | 3407 | struct bonding *bond = netdev_priv(bond_dev); |
ba3211cc PP |
3408 | struct slave *slave; |
3409 | int i; | |
1da177e4 | 3410 | |
ba3211cc PP |
3411 | /* reset slave->backup and slave->inactive */ |
3412 | read_lock(&bond->lock); | |
3413 | if (bond->slave_cnt > 0) { | |
3414 | read_lock(&bond->curr_slave_lock); | |
3415 | bond_for_each_slave(bond, slave, i) { | |
3416 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3417 | && (slave != bond->curr_active_slave)) { | |
3418 | bond_set_slave_inactive_flags(slave); | |
3419 | } else { | |
3420 | bond_set_slave_active_flags(slave); | |
3421 | } | |
3422 | } | |
3423 | read_unlock(&bond->curr_slave_lock); | |
3424 | } | |
3425 | read_unlock(&bond->lock); | |
3426 | ||
5a37e8ca FL |
3427 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3428 | ||
58402054 | 3429 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3430 | /* bond_alb_initialize must be called before the timer |
3431 | * is started. | |
3432 | */ | |
3433 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3434 | /* something went wrong - fail the open operation */ | |
b473946a | 3435 | return -ENOMEM; |
1da177e4 LT |
3436 | } |
3437 | ||
1b76b316 JV |
3438 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3439 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3440 | } |
3441 | ||
3442 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3443 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3444 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3445 | } |
3446 | ||
3447 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3448 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3449 | INIT_DELAYED_WORK(&bond->arp_work, | |
3450 | bond_activebackup_arp_mon); | |
3451 | else | |
3452 | INIT_DELAYED_WORK(&bond->arp_work, | |
3453 | bond_loadbalance_arp_mon); | |
3454 | ||
3455 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3456 | if (bond->params.arp_validate) |
3aba891d | 3457 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3458 | } |
3459 | ||
3460 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3461 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3462 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3463 | /* register to receive LACPDUs */ |
3aba891d | 3464 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3465 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3466 | } |
3467 | ||
3468 | return 0; | |
3469 | } | |
3470 | ||
3471 | static int bond_close(struct net_device *bond_dev) | |
3472 | { | |
454d7c9b | 3473 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3474 | |
1da177e4 LT |
3475 | write_lock_bh(&bond->lock); |
3476 | ||
ad246c99 BH |
3477 | bond->send_peer_notif = 0; |
3478 | ||
1da177e4 LT |
3479 | write_unlock_bh(&bond->lock); |
3480 | ||
1da177e4 | 3481 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
e6d265e8 | 3482 | cancel_delayed_work_sync(&bond->mii_work); |
1da177e4 LT |
3483 | } |
3484 | ||
3485 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
e6d265e8 | 3486 | cancel_delayed_work_sync(&bond->arp_work); |
1da177e4 LT |
3487 | } |
3488 | ||
3489 | switch (bond->params.mode) { | |
3490 | case BOND_MODE_8023AD: | |
e6d265e8 | 3491 | cancel_delayed_work_sync(&bond->ad_work); |
1da177e4 LT |
3492 | break; |
3493 | case BOND_MODE_TLB: | |
3494 | case BOND_MODE_ALB: | |
e6d265e8 | 3495 | cancel_delayed_work_sync(&bond->alb_work); |
1da177e4 LT |
3496 | break; |
3497 | default: | |
3498 | break; | |
3499 | } | |
3500 | ||
5a37e8ca | 3501 | if (delayed_work_pending(&bond->mcast_work)) |
e6d265e8 | 3502 | cancel_delayed_work_sync(&bond->mcast_work); |
1da177e4 | 3503 | |
58402054 | 3504 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3505 | /* Must be called only after all |
3506 | * slaves have been released | |
3507 | */ | |
3508 | bond_alb_deinitialize(bond); | |
3509 | } | |
3aba891d | 3510 | bond->recv_probe = NULL; |
1da177e4 LT |
3511 | |
3512 | return 0; | |
3513 | } | |
3514 | ||
28172739 ED |
3515 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3516 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3517 | { |
454d7c9b | 3518 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3519 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3520 | struct slave *slave; |
3521 | int i; | |
3522 | ||
28172739 | 3523 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3524 | |
3525 | read_lock_bh(&bond->lock); | |
3526 | ||
3527 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3528 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3529 | dev_get_stats(slave->dev, &temp); |
3530 | ||
3531 | stats->rx_packets += sstats->rx_packets; | |
3532 | stats->rx_bytes += sstats->rx_bytes; | |
3533 | stats->rx_errors += sstats->rx_errors; | |
3534 | stats->rx_dropped += sstats->rx_dropped; | |
3535 | ||
3536 | stats->tx_packets += sstats->tx_packets; | |
3537 | stats->tx_bytes += sstats->tx_bytes; | |
3538 | stats->tx_errors += sstats->tx_errors; | |
3539 | stats->tx_dropped += sstats->tx_dropped; | |
3540 | ||
3541 | stats->multicast += sstats->multicast; | |
3542 | stats->collisions += sstats->collisions; | |
3543 | ||
3544 | stats->rx_length_errors += sstats->rx_length_errors; | |
3545 | stats->rx_over_errors += sstats->rx_over_errors; | |
3546 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3547 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3548 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3549 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3550 | ||
3551 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3552 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3553 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3554 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3555 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3556 | } |
3557 | ||
1da177e4 LT |
3558 | read_unlock_bh(&bond->lock); |
3559 | ||
3560 | return stats; | |
3561 | } | |
3562 | ||
3563 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3564 | { | |
3565 | struct net_device *slave_dev = NULL; | |
3566 | struct ifbond k_binfo; | |
3567 | struct ifbond __user *u_binfo = NULL; | |
3568 | struct ifslave k_sinfo; | |
3569 | struct ifslave __user *u_sinfo = NULL; | |
3570 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3571 | int res = 0; |
3572 | ||
a4aee5c8 | 3573 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3574 | |
3575 | switch (cmd) { | |
1da177e4 LT |
3576 | case SIOCGMIIPHY: |
3577 | mii = if_mii(ifr); | |
3d632c3f | 3578 | if (!mii) |
1da177e4 | 3579 | return -EINVAL; |
3d632c3f | 3580 | |
1da177e4 LT |
3581 | mii->phy_id = 0; |
3582 | /* Fall Through */ | |
3583 | case SIOCGMIIREG: | |
3584 | /* | |
3585 | * We do this again just in case we were called by SIOCGMIIREG | |
3586 | * instead of SIOCGMIIPHY. | |
3587 | */ | |
3588 | mii = if_mii(ifr); | |
3d632c3f | 3589 | if (!mii) |
1da177e4 | 3590 | return -EINVAL; |
3d632c3f | 3591 | |
1da177e4 LT |
3592 | |
3593 | if (mii->reg_num == 1) { | |
454d7c9b | 3594 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3595 | mii->val_out = 0; |
6603a6f2 | 3596 | read_lock(&bond->lock); |
1da177e4 | 3597 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3598 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3599 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3600 | |
1da177e4 | 3601 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3602 | read_unlock(&bond->lock); |
1da177e4 LT |
3603 | } |
3604 | ||
3605 | return 0; | |
3606 | case BOND_INFO_QUERY_OLD: | |
3607 | case SIOCBONDINFOQUERY: | |
3608 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3609 | ||
3d632c3f | 3610 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3611 | return -EFAULT; |
1da177e4 LT |
3612 | |
3613 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3614 | if (res == 0 && |
3615 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3616 | return -EFAULT; | |
1da177e4 LT |
3617 | |
3618 | return res; | |
3619 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3620 | case SIOCBONDSLAVEINFOQUERY: | |
3621 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3622 | ||
3d632c3f | 3623 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3624 | return -EFAULT; |
1da177e4 LT |
3625 | |
3626 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3627 | if (res == 0 && |
3628 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3629 | return -EFAULT; | |
1da177e4 LT |
3630 | |
3631 | return res; | |
3632 | default: | |
3633 | /* Go on */ | |
3634 | break; | |
3635 | } | |
3636 | ||
3d632c3f | 3637 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3638 | return -EPERM; |
1da177e4 | 3639 | |
ec87fd3b | 3640 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3641 | |
a4aee5c8 | 3642 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3643 | |
3d632c3f | 3644 | if (!slave_dev) |
1da177e4 | 3645 | res = -ENODEV; |
3d632c3f | 3646 | else { |
a4aee5c8 | 3647 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3648 | switch (cmd) { |
3649 | case BOND_ENSLAVE_OLD: | |
3650 | case SIOCBONDENSLAVE: | |
3651 | res = bond_enslave(bond_dev, slave_dev); | |
3652 | break; | |
3653 | case BOND_RELEASE_OLD: | |
3654 | case SIOCBONDRELEASE: | |
3655 | res = bond_release(bond_dev, slave_dev); | |
3656 | break; | |
3657 | case BOND_SETHWADDR_OLD: | |
3658 | case SIOCBONDSETHWADDR: | |
3659 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3660 | break; | |
3661 | case BOND_CHANGE_ACTIVE_OLD: | |
3662 | case SIOCBONDCHANGEACTIVE: | |
3663 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3664 | break; | |
3665 | default: | |
3666 | res = -EOPNOTSUPP; | |
3667 | } | |
3668 | ||
3669 | dev_put(slave_dev); | |
3670 | } | |
3671 | ||
1da177e4 LT |
3672 | return res; |
3673 | } | |
3674 | ||
22bedad3 JP |
3675 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3676 | struct netdev_hw_addr_list *list, | |
3677 | int addrlen) | |
3678 | { | |
3679 | struct netdev_hw_addr *ha; | |
3680 | ||
3681 | netdev_hw_addr_list_for_each(ha, list) | |
3682 | if (!memcmp(ha->addr, addr, addrlen)) | |
3683 | return true; | |
3684 | ||
3685 | return false; | |
3686 | } | |
3687 | ||
d03462b9 | 3688 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3689 | { |
454d7c9b | 3690 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3691 | |
d03462b9 JP |
3692 | if (change & IFF_PROMISC) |
3693 | bond_set_promiscuity(bond, | |
3694 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3695 | |
d03462b9 JP |
3696 | if (change & IFF_ALLMULTI) |
3697 | bond_set_allmulti(bond, | |
3698 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3699 | } | |
1da177e4 | 3700 | |
d03462b9 JP |
3701 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3702 | { | |
3703 | struct bonding *bond = netdev_priv(bond_dev); | |
3704 | struct netdev_hw_addr *ha; | |
3705 | bool found; | |
1da177e4 | 3706 | |
80ee5ad2 JV |
3707 | read_lock(&bond->lock); |
3708 | ||
1da177e4 | 3709 | /* looking for addresses to add to slaves' mc list */ |
22bedad3 JP |
3710 | netdev_for_each_mc_addr(ha, bond_dev) { |
3711 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3712 | bond_dev->addr_len); | |
3713 | if (!found) | |
3714 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3715 | } |
3716 | ||
3717 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3718 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3719 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3720 | bond_dev->addr_len); | |
3721 | if (!found) | |
3722 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3723 | } |
3724 | ||
3725 | /* save master's multicast list */ | |
22bedad3 JP |
3726 | __hw_addr_flush(&bond->mc_list); |
3727 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3728 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3729 | |
80ee5ad2 | 3730 | read_unlock(&bond->lock); |
1da177e4 LT |
3731 | } |
3732 | ||
00829823 SH |
3733 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
3734 | { | |
3735 | struct bonding *bond = netdev_priv(dev); | |
3736 | struct slave *slave = bond->first_slave; | |
3737 | ||
3738 | if (slave) { | |
3739 | const struct net_device_ops *slave_ops | |
3740 | = slave->dev->netdev_ops; | |
3741 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 3742 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
3743 | } |
3744 | return 0; | |
3745 | } | |
3746 | ||
1da177e4 LT |
3747 | /* |
3748 | * Change the MTU of all of a master's slaves to match the master | |
3749 | */ | |
3750 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3751 | { | |
454d7c9b | 3752 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3753 | struct slave *slave, *stop_at; |
3754 | int res = 0; | |
3755 | int i; | |
3756 | ||
5a03cdb7 | 3757 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3758 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3759 | |
3760 | /* Can't hold bond->lock with bh disabled here since | |
3761 | * some base drivers panic. On the other hand we can't | |
3762 | * hold bond->lock without bh disabled because we'll | |
3763 | * deadlock. The only solution is to rely on the fact | |
3764 | * that we're under rtnl_lock here, and the slaves | |
3765 | * list won't change. This doesn't solve the problem | |
3766 | * of setting the slave's MTU while it is | |
3767 | * transmitting, but the assumption is that the base | |
3768 | * driver can handle that. | |
3769 | * | |
3770 | * TODO: figure out a way to safely iterate the slaves | |
3771 | * list, but without holding a lock around the actual | |
3772 | * call to the base driver. | |
3773 | */ | |
3774 | ||
3775 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3776 | pr_debug("s %p s->p %p c_m %p\n", |
3777 | slave, | |
3778 | slave->prev, | |
3779 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3780 | |
1da177e4 LT |
3781 | res = dev_set_mtu(slave->dev, new_mtu); |
3782 | ||
3783 | if (res) { | |
3784 | /* If we failed to set the slave's mtu to the new value | |
3785 | * we must abort the operation even in ACTIVE_BACKUP | |
3786 | * mode, because if we allow the backup slaves to have | |
3787 | * different mtu values than the active slave we'll | |
3788 | * need to change their mtu when doing a failover. That | |
3789 | * means changing their mtu from timer context, which | |
3790 | * is probably not a good idea. | |
3791 | */ | |
5a03cdb7 | 3792 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3793 | goto unwind; |
3794 | } | |
3795 | } | |
3796 | ||
3797 | bond_dev->mtu = new_mtu; | |
3798 | ||
3799 | return 0; | |
3800 | ||
3801 | unwind: | |
3802 | /* unwind from head to the slave that failed */ | |
3803 | stop_at = slave; | |
3804 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3805 | int tmp_res; | |
3806 | ||
3807 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3808 | if (tmp_res) { | |
a4aee5c8 JP |
3809 | pr_debug("unwind err %d dev %s\n", |
3810 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3811 | } |
3812 | } | |
3813 | ||
3814 | return res; | |
3815 | } | |
3816 | ||
3817 | /* | |
3818 | * Change HW address | |
3819 | * | |
3820 | * Note that many devices must be down to change the HW address, and | |
3821 | * downing the master releases all slaves. We can make bonds full of | |
3822 | * bonding devices to test this, however. | |
3823 | */ | |
3824 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3825 | { | |
454d7c9b | 3826 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3827 | struct sockaddr *sa = addr, tmp_sa; |
3828 | struct slave *slave, *stop_at; | |
3829 | int res = 0; | |
3830 | int i; | |
3831 | ||
eb7cc59a SH |
3832 | if (bond->params.mode == BOND_MODE_ALB) |
3833 | return bond_alb_set_mac_address(bond_dev, addr); | |
3834 | ||
3835 | ||
a4aee5c8 JP |
3836 | pr_debug("bond=%p, name=%s\n", |
3837 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3838 | |
dd957c57 | 3839 | /* |
3915c1e8 JV |
3840 | * If fail_over_mac is set to active, do nothing and return |
3841 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3842 | */ |
3915c1e8 | 3843 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3844 | return 0; |
2ab82852 | 3845 | |
3d632c3f | 3846 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3847 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3848 | |
3849 | /* Can't hold bond->lock with bh disabled here since | |
3850 | * some base drivers panic. On the other hand we can't | |
3851 | * hold bond->lock without bh disabled because we'll | |
3852 | * deadlock. The only solution is to rely on the fact | |
3853 | * that we're under rtnl_lock here, and the slaves | |
3854 | * list won't change. This doesn't solve the problem | |
3855 | * of setting the slave's hw address while it is | |
3856 | * transmitting, but the assumption is that the base | |
3857 | * driver can handle that. | |
3858 | * | |
3859 | * TODO: figure out a way to safely iterate the slaves | |
3860 | * list, but without holding a lock around the actual | |
3861 | * call to the base driver. | |
3862 | */ | |
3863 | ||
3864 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3865 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3866 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3867 | |
eb7cc59a | 3868 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3869 | res = -EOPNOTSUPP; |
5a03cdb7 | 3870 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3871 | goto unwind; |
3872 | } | |
3873 | ||
3874 | res = dev_set_mac_address(slave->dev, addr); | |
3875 | if (res) { | |
3876 | /* TODO: consider downing the slave | |
3877 | * and retry ? | |
3878 | * User should expect communications | |
3879 | * breakage anyway until ARP finish | |
3880 | * updating, so... | |
3881 | */ | |
5a03cdb7 | 3882 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3883 | goto unwind; |
3884 | } | |
3885 | } | |
3886 | ||
3887 | /* success */ | |
3888 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3889 | return 0; | |
3890 | ||
3891 | unwind: | |
3892 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3893 | tmp_sa.sa_family = bond_dev->type; | |
3894 | ||
3895 | /* unwind from head to the slave that failed */ | |
3896 | stop_at = slave; | |
3897 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3898 | int tmp_res; | |
3899 | ||
3900 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3901 | if (tmp_res) { | |
a4aee5c8 JP |
3902 | pr_debug("unwind err %d dev %s\n", |
3903 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3904 | } |
3905 | } | |
3906 | ||
3907 | return res; | |
3908 | } | |
3909 | ||
3910 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3911 | { | |
454d7c9b | 3912 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3913 | struct slave *slave, *start_at; |
cf5f9044 | 3914 | int i, slave_no, res = 1; |
a2fd940f | 3915 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3916 | |
cf5f9044 | 3917 | /* |
a2fd940f AG |
3918 | * Start with the curr_active_slave that joined the bond as the |
3919 | * default for sending IGMP traffic. For failover purposes one | |
3920 | * needs to maintain some consistency for the interface that will | |
3921 | * send the join/membership reports. The curr_active_slave found | |
3922 | * will send all of this type of traffic. | |
cf5f9044 | 3923 | */ |
00ae7028 | 3924 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3925 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3926 | |
a2fd940f AG |
3927 | read_lock(&bond->curr_slave_lock); |
3928 | slave = bond->curr_active_slave; | |
3929 | read_unlock(&bond->curr_slave_lock); | |
3930 | ||
3931 | if (!slave) | |
3932 | goto out; | |
3933 | } else { | |
3934 | /* | |
3935 | * Concurrent TX may collide on rr_tx_counter; we accept | |
3936 | * that as being rare enough not to justify using an | |
3937 | * atomic op here. | |
3938 | */ | |
3939 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
3940 | ||
3941 | bond_for_each_slave(bond, slave, i) { | |
3942 | slave_no--; | |
3943 | if (slave_no < 0) | |
3944 | break; | |
3945 | } | |
1da177e4 LT |
3946 | } |
3947 | ||
cf5f9044 | 3948 | start_at = slave; |
1da177e4 LT |
3949 | bond_for_each_slave_from(bond, slave, i, start_at) { |
3950 | if (IS_UP(slave->dev) && | |
3951 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 3952 | bond_is_active_slave(slave)) { |
1da177e4 | 3953 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
3954 | break; |
3955 | } | |
3956 | } | |
3957 | ||
1da177e4 LT |
3958 | out: |
3959 | if (res) { | |
3960 | /* no suitable interface, frame not sent */ | |
3961 | dev_kfree_skb(skb); | |
3962 | } | |
0693e88e | 3963 | |
ec634fe3 | 3964 | return NETDEV_TX_OK; |
1da177e4 LT |
3965 | } |
3966 | ||
075897ce | 3967 | |
1da177e4 LT |
3968 | /* |
3969 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3970 | * the bond has a usable interface. | |
3971 | */ | |
3972 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3973 | { | |
454d7c9b | 3974 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3975 | int res = 1; |
3976 | ||
1da177e4 LT |
3977 | read_lock(&bond->curr_slave_lock); |
3978 | ||
0693e88e MM |
3979 | if (bond->curr_active_slave) |
3980 | res = bond_dev_queue_xmit(bond, skb, | |
3981 | bond->curr_active_slave->dev); | |
1da177e4 | 3982 | |
3d632c3f | 3983 | if (res) |
1da177e4 LT |
3984 | /* no suitable interface, frame not sent */ |
3985 | dev_kfree_skb(skb); | |
3d632c3f | 3986 | |
1da177e4 | 3987 | read_unlock(&bond->curr_slave_lock); |
0693e88e | 3988 | |
ec634fe3 | 3989 | return NETDEV_TX_OK; |
1da177e4 LT |
3990 | } |
3991 | ||
3992 | /* | |
169a3e66 JV |
3993 | * In bond_xmit_xor() , we determine the output device by using a pre- |
3994 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
3995 | * find the next active slave. | |
1da177e4 LT |
3996 | */ |
3997 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
3998 | { | |
454d7c9b | 3999 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4000 | struct slave *slave, *start_at; |
4001 | int slave_no; | |
4002 | int i; | |
4003 | int res = 1; | |
4004 | ||
a361c83c | 4005 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4006 | |
4007 | bond_for_each_slave(bond, slave, i) { | |
4008 | slave_no--; | |
3d632c3f | 4009 | if (slave_no < 0) |
1da177e4 | 4010 | break; |
1da177e4 LT |
4011 | } |
4012 | ||
4013 | start_at = slave; | |
4014 | ||
4015 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4016 | if (IS_UP(slave->dev) && | |
4017 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4018 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4019 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4020 | break; | |
4021 | } | |
4022 | } | |
4023 | ||
1da177e4 LT |
4024 | if (res) { |
4025 | /* no suitable interface, frame not sent */ | |
4026 | dev_kfree_skb(skb); | |
4027 | } | |
0693e88e | 4028 | |
ec634fe3 | 4029 | return NETDEV_TX_OK; |
1da177e4 LT |
4030 | } |
4031 | ||
4032 | /* | |
4033 | * in broadcast mode, we send everything to all usable interfaces. | |
4034 | */ | |
4035 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4036 | { | |
454d7c9b | 4037 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4038 | struct slave *slave, *start_at; |
4039 | struct net_device *tx_dev = NULL; | |
4040 | int i; | |
4041 | int res = 1; | |
4042 | ||
1da177e4 LT |
4043 | read_lock(&bond->curr_slave_lock); |
4044 | start_at = bond->curr_active_slave; | |
4045 | read_unlock(&bond->curr_slave_lock); | |
4046 | ||
3d632c3f | 4047 | if (!start_at) |
1da177e4 | 4048 | goto out; |
1da177e4 LT |
4049 | |
4050 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4051 | if (IS_UP(slave->dev) && | |
4052 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4053 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4054 | if (tx_dev) { |
4055 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4056 | if (!skb2) { | |
a4aee5c8 | 4057 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4058 | bond_dev->name); |
1da177e4 LT |
4059 | continue; |
4060 | } | |
4061 | ||
4062 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4063 | if (res) { | |
4064 | dev_kfree_skb(skb2); | |
4065 | continue; | |
4066 | } | |
4067 | } | |
4068 | tx_dev = slave->dev; | |
4069 | } | |
4070 | } | |
4071 | ||
3d632c3f | 4072 | if (tx_dev) |
1da177e4 | 4073 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4074 | |
4075 | out: | |
3d632c3f | 4076 | if (res) |
1da177e4 LT |
4077 | /* no suitable interface, frame not sent */ |
4078 | dev_kfree_skb(skb); | |
3d632c3f | 4079 | |
1da177e4 | 4080 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4081 | return NETDEV_TX_OK; |
1da177e4 LT |
4082 | } |
4083 | ||
4084 | /*------------------------- Device initialization ---------------------------*/ | |
4085 | ||
6f6652be JV |
4086 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4087 | { | |
4088 | switch (bond->params.xmit_policy) { | |
4089 | case BOND_XMIT_POLICY_LAYER23: | |
4090 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4091 | break; | |
4092 | case BOND_XMIT_POLICY_LAYER34: | |
4093 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4094 | break; | |
4095 | case BOND_XMIT_POLICY_LAYER2: | |
4096 | default: | |
4097 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4098 | break; | |
4099 | } | |
4100 | } | |
4101 | ||
bb1d9123 AG |
4102 | /* |
4103 | * Lookup the slave that corresponds to a qid | |
4104 | */ | |
4105 | static inline int bond_slave_override(struct bonding *bond, | |
4106 | struct sk_buff *skb) | |
4107 | { | |
4108 | int i, res = 1; | |
4109 | struct slave *slave = NULL; | |
4110 | struct slave *check_slave; | |
4111 | ||
0693e88e MM |
4112 | if (!skb->queue_mapping) |
4113 | return 1; | |
bb1d9123 AG |
4114 | |
4115 | /* Find out if any slaves have the same mapping as this skb. */ | |
4116 | bond_for_each_slave(bond, check_slave, i) { | |
4117 | if (check_slave->queue_id == skb->queue_mapping) { | |
4118 | slave = check_slave; | |
4119 | break; | |
4120 | } | |
4121 | } | |
4122 | ||
4123 | /* If the slave isn't UP, use default transmit policy. */ | |
4124 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4125 | (slave->link == BOND_LINK_UP)) { | |
4126 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4127 | } | |
4128 | ||
bb1d9123 AG |
4129 | return res; |
4130 | } | |
4131 | ||
374eeb5a | 4132 | |
bb1d9123 AG |
4133 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4134 | { | |
4135 | /* | |
4136 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4137 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4138 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4139 | * way down to the bonding driver. | |
4140 | */ | |
fd0e435b PO |
4141 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4142 | ||
374eeb5a NH |
4143 | /* |
4144 | * Save the original txq to restore before passing to the driver | |
4145 | */ | |
4146 | bond_queue_mapping(skb) = skb->queue_mapping; | |
4147 | ||
fd0e435b | 4148 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4149 | do { |
fd0e435b | 4150 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4151 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4152 | } |
4153 | return txq; | |
bb1d9123 AG |
4154 | } |
4155 | ||
0693e88e | 4156 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4157 | { |
bb1d9123 AG |
4158 | struct bonding *bond = netdev_priv(dev); |
4159 | ||
4160 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4161 | if (!bond_slave_override(bond, skb)) | |
4162 | return NETDEV_TX_OK; | |
4163 | } | |
00829823 SH |
4164 | |
4165 | switch (bond->params.mode) { | |
4166 | case BOND_MODE_ROUNDROBIN: | |
4167 | return bond_xmit_roundrobin(skb, dev); | |
4168 | case BOND_MODE_ACTIVEBACKUP: | |
4169 | return bond_xmit_activebackup(skb, dev); | |
4170 | case BOND_MODE_XOR: | |
4171 | return bond_xmit_xor(skb, dev); | |
4172 | case BOND_MODE_BROADCAST: | |
4173 | return bond_xmit_broadcast(skb, dev); | |
4174 | case BOND_MODE_8023AD: | |
4175 | return bond_3ad_xmit_xor(skb, dev); | |
4176 | case BOND_MODE_ALB: | |
4177 | case BOND_MODE_TLB: | |
4178 | return bond_alb_xmit(skb, dev); | |
4179 | default: | |
4180 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4181 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4182 | dev->name, bond->params.mode); | |
00829823 SH |
4183 | WARN_ON_ONCE(1); |
4184 | dev_kfree_skb(skb); | |
4185 | return NETDEV_TX_OK; | |
4186 | } | |
4187 | } | |
4188 | ||
0693e88e MM |
4189 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4190 | { | |
4191 | struct bonding *bond = netdev_priv(dev); | |
4192 | netdev_tx_t ret = NETDEV_TX_OK; | |
4193 | ||
4194 | /* | |
4195 | * If we risk deadlock from transmitting this in the | |
4196 | * netpoll path, tell netpoll to queue the frame for later tx | |
4197 | */ | |
4198 | if (is_netpoll_tx_blocked(dev)) | |
4199 | return NETDEV_TX_BUSY; | |
4200 | ||
4201 | read_lock(&bond->lock); | |
4202 | ||
4203 | if (bond->slave_cnt) | |
4204 | ret = __bond_start_xmit(skb, dev); | |
4205 | else | |
4206 | dev_kfree_skb(skb); | |
4207 | ||
4208 | read_unlock(&bond->lock); | |
4209 | ||
4210 | return ret; | |
4211 | } | |
00829823 | 4212 | |
1da177e4 LT |
4213 | /* |
4214 | * set bond mode specific net device operations | |
4215 | */ | |
a77b5325 | 4216 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4217 | { |
169a3e66 JV |
4218 | struct net_device *bond_dev = bond->dev; |
4219 | ||
1da177e4 LT |
4220 | switch (mode) { |
4221 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4222 | break; |
4223 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4224 | break; |
4225 | case BOND_MODE_XOR: | |
6f6652be | 4226 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4227 | break; |
4228 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4229 | break; |
4230 | case BOND_MODE_8023AD: | |
6f6652be | 4231 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4232 | break; |
1da177e4 | 4233 | case BOND_MODE_ALB: |
8f903c70 JV |
4234 | /* FALLTHRU */ |
4235 | case BOND_MODE_TLB: | |
1da177e4 LT |
4236 | break; |
4237 | default: | |
4238 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4239 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4240 | bond_dev->name, mode); | |
1da177e4 LT |
4241 | break; |
4242 | } | |
4243 | } | |
4244 | ||
217df670 JV |
4245 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4246 | struct ethtool_drvinfo *drvinfo) | |
4247 | { | |
4248 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4249 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4250 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4251 | } | |
4252 | ||
7282d491 | 4253 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4254 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac | 4255 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4256 | }; |
4257 | ||
eb7cc59a | 4258 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4259 | .ndo_init = bond_init, |
9e71626c | 4260 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4261 | .ndo_open = bond_open, |
4262 | .ndo_stop = bond_close, | |
00829823 | 4263 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4264 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4265 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 4266 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 4267 | .ndo_change_rx_flags = bond_change_rx_flags, |
afc4b13d | 4268 | .ndo_set_rx_mode = bond_set_multicast_list, |
eb7cc59a | 4269 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 4270 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4271 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 4272 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 4273 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 4274 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4275 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4276 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4277 | .ndo_poll_controller = bond_poll_controller, | |
4278 | #endif | |
9232ecca JP |
4279 | .ndo_add_slave = bond_enslave, |
4280 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4281 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4282 | }; |
4283 | ||
9e2e61fb AW |
4284 | static void bond_destructor(struct net_device *bond_dev) |
4285 | { | |
4286 | struct bonding *bond = netdev_priv(bond_dev); | |
4287 | if (bond->wq) | |
4288 | destroy_workqueue(bond->wq); | |
4289 | free_netdev(bond_dev); | |
4290 | } | |
4291 | ||
181470fc | 4292 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4293 | { |
454d7c9b | 4294 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4295 | |
1da177e4 LT |
4296 | /* initialize rwlocks */ |
4297 | rwlock_init(&bond->lock); | |
4298 | rwlock_init(&bond->curr_slave_lock); | |
4299 | ||
d2991f75 | 4300 | bond->params = bonding_defaults; |
1da177e4 LT |
4301 | |
4302 | /* Initialize pointers */ | |
1da177e4 LT |
4303 | bond->dev = bond_dev; |
4304 | INIT_LIST_HEAD(&bond->vlan_list); | |
4305 | ||
4306 | /* Initialize the device entry points */ | |
181470fc | 4307 | ether_setup(bond_dev); |
eb7cc59a | 4308 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4309 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4310 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4311 | |
9e2e61fb | 4312 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4313 | |
4314 | /* Initialize the device options */ | |
4315 | bond_dev->tx_queue_len = 0; | |
4316 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4317 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 4318 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 4319 | |
1da177e4 LT |
4320 | /* At first, we block adding VLANs. That's the only way to |
4321 | * prevent problems that occur when adding VLANs over an | |
4322 | * empty bond. The block will be removed once non-challenged | |
4323 | * slaves are enslaved. | |
4324 | */ | |
4325 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4326 | ||
932ff279 | 4327 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4328 | * transmitting */ |
4329 | bond_dev->features |= NETIF_F_LLTX; | |
4330 | ||
4331 | /* By default, we declare the bond to be fully | |
4332 | * VLAN hardware accelerated capable. Special | |
4333 | * care is taken in the various xmit functions | |
4334 | * when there are slaves that are not hw accel | |
4335 | * capable | |
4336 | */ | |
1da177e4 | 4337 | |
b2a103e6 MM |
4338 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
4339 | NETIF_F_HW_VLAN_TX | | |
4340 | NETIF_F_HW_VLAN_RX | | |
4341 | NETIF_F_HW_VLAN_FILTER; | |
4342 | ||
34324dc2 | 4343 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
b2a103e6 | 4344 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
4345 | } |
4346 | ||
fdaea7a9 JV |
4347 | static void bond_work_cancel_all(struct bonding *bond) |
4348 | { | |
fdaea7a9 | 4349 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) |
e6d265e8 | 4350 | cancel_delayed_work_sync(&bond->mii_work); |
fdaea7a9 JV |
4351 | |
4352 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
e6d265e8 | 4353 | cancel_delayed_work_sync(&bond->arp_work); |
fdaea7a9 JV |
4354 | |
4355 | if (bond->params.mode == BOND_MODE_ALB && | |
4356 | delayed_work_pending(&bond->alb_work)) | |
e6d265e8 | 4357 | cancel_delayed_work_sync(&bond->alb_work); |
fdaea7a9 JV |
4358 | |
4359 | if (bond->params.mode == BOND_MODE_8023AD && | |
4360 | delayed_work_pending(&bond->ad_work)) | |
e6d265e8 | 4361 | cancel_delayed_work_sync(&bond->ad_work); |
5a37e8ca FL |
4362 | |
4363 | if (delayed_work_pending(&bond->mcast_work)) | |
e6d265e8 | 4364 | cancel_delayed_work_sync(&bond->mcast_work); |
fdaea7a9 JV |
4365 | } |
4366 | ||
c67dfb29 EB |
4367 | /* |
4368 | * Destroy a bonding device. | |
4369 | * Must be under rtnl_lock when this function is called. | |
4370 | */ | |
4371 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4372 | { |
454d7c9b | 4373 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4374 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4375 | |
f6dc31a8 WC |
4376 | bond_netpoll_cleanup(bond_dev); |
4377 | ||
c67dfb29 EB |
4378 | /* Release the bonded slaves */ |
4379 | bond_release_all(bond_dev); | |
4380 | ||
a434e43f JV |
4381 | list_del(&bond->bond_list); |
4382 | ||
4383 | bond_work_cancel_all(bond); | |
4384 | ||
a434e43f | 4385 | bond_remove_proc_entry(bond); |
c67dfb29 | 4386 | |
f073c7ca TI |
4387 | bond_debug_unregister(bond); |
4388 | ||
22bedad3 | 4389 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4390 | |
4391 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4392 | list_del(&vlan->vlan_list); | |
4393 | kfree(vlan); | |
4394 | } | |
a434e43f JV |
4395 | } |
4396 | ||
1da177e4 LT |
4397 | /*------------------------- Module initialization ---------------------------*/ |
4398 | ||
4399 | /* | |
4400 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4401 | * number of the mode or its string name. A bit complicated because |
4402 | * some mode names are substrings of other names, and calls from sysfs | |
4403 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4404 | */ |
325dcf7a | 4405 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4406 | { |
54b87323 | 4407 | int modeint = -1, i, rv; |
a42e534f | 4408 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4409 | |
a42e534f JV |
4410 | for (p = (char *)buf; *p; p++) |
4411 | if (!(isdigit(*p) || isspace(*p))) | |
4412 | break; | |
4413 | ||
4414 | if (*p) | |
ece95f7f | 4415 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4416 | else |
54b87323 | 4417 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4418 | |
4419 | if (!rv) | |
4420 | return -1; | |
1da177e4 LT |
4421 | |
4422 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4423 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4424 | return tbl[i].mode; |
4425 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4426 | return tbl[i].mode; |
1da177e4 LT |
4427 | } |
4428 | ||
4429 | return -1; | |
4430 | } | |
4431 | ||
4432 | static int bond_check_params(struct bond_params *params) | |
4433 | { | |
a549952a | 4434 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4435 | |
1da177e4 LT |
4436 | /* |
4437 | * Convert string parameters. | |
4438 | */ | |
4439 | if (mode) { | |
4440 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4441 | if (bond_mode == -1) { | |
a4aee5c8 | 4442 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4443 | mode == NULL ? "NULL" : mode); |
4444 | return -EINVAL; | |
4445 | } | |
4446 | } | |
4447 | ||
169a3e66 JV |
4448 | if (xmit_hash_policy) { |
4449 | if ((bond_mode != BOND_MODE_XOR) && | |
4450 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4451 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4452 | bond_mode_name(bond_mode)); |
4453 | } else { | |
4454 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4455 | xmit_hashtype_tbl); | |
4456 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4457 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4458 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4459 | xmit_hash_policy); |
4460 | return -EINVAL; | |
4461 | } | |
4462 | } | |
4463 | } | |
4464 | ||
1da177e4 LT |
4465 | if (lacp_rate) { |
4466 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4467 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4468 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4469 | } else { |
4470 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4471 | if (lacp_fast == -1) { | |
a4aee5c8 | 4472 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4473 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4474 | return -EINVAL; | |
4475 | } | |
4476 | } | |
4477 | } | |
4478 | ||
fd989c83 JV |
4479 | if (ad_select) { |
4480 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4481 | if (params->ad_select == -1) { | |
a4aee5c8 | 4482 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4483 | ad_select == NULL ? "NULL" : ad_select); |
4484 | return -EINVAL; | |
4485 | } | |
4486 | ||
4487 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4488 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4489 | } |
4490 | } else { | |
4491 | params->ad_select = BOND_AD_STABLE; | |
4492 | } | |
4493 | ||
f5841306 | 4494 | if (max_bonds < 0) { |
a4aee5c8 JP |
4495 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4496 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4497 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4498 | } | |
4499 | ||
4500 | if (miimon < 0) { | |
a4aee5c8 JP |
4501 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4502 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4503 | miimon = BOND_LINK_MON_INTERV; |
4504 | } | |
4505 | ||
4506 | if (updelay < 0) { | |
a4aee5c8 JP |
4507 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4508 | updelay, INT_MAX); | |
1da177e4 LT |
4509 | updelay = 0; |
4510 | } | |
4511 | ||
4512 | if (downdelay < 0) { | |
a4aee5c8 JP |
4513 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4514 | downdelay, INT_MAX); | |
1da177e4 LT |
4515 | downdelay = 0; |
4516 | } | |
4517 | ||
4518 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4519 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4520 | use_carrier); | |
1da177e4 LT |
4521 | use_carrier = 1; |
4522 | } | |
4523 | ||
ad246c99 BH |
4524 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4525 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4526 | num_peer_notif); | |
4527 | num_peer_notif = 1; | |
4528 | } | |
4529 | ||
1da177e4 LT |
4530 | /* reset values for 802.3ad */ |
4531 | if (bond_mode == BOND_MODE_8023AD) { | |
4532 | if (!miimon) { | |
a4aee5c8 | 4533 | 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 | 4534 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4535 | miimon = 100; |
4536 | } | |
4537 | } | |
4538 | ||
bb1d9123 AG |
4539 | if (tx_queues < 1 || tx_queues > 255) { |
4540 | pr_warning("Warning: tx_queues (%d) should be between " | |
4541 | "1 and 255, resetting to %d\n", | |
4542 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4543 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4544 | } | |
4545 | ||
ebd8e497 AG |
4546 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4547 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4548 | "not of valid value (0/1), so it was set to " | |
4549 | "0\n", all_slaves_active); | |
4550 | all_slaves_active = 0; | |
4551 | } | |
4552 | ||
c2952c31 FL |
4553 | if (resend_igmp < 0 || resend_igmp > 255) { |
4554 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4555 | "0 and 255, resetting to %d\n", | |
4556 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4557 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4558 | } | |
4559 | ||
1da177e4 LT |
4560 | /* reset values for TLB/ALB */ |
4561 | if ((bond_mode == BOND_MODE_TLB) || | |
4562 | (bond_mode == BOND_MODE_ALB)) { | |
4563 | if (!miimon) { | |
a4aee5c8 | 4564 | 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 | 4565 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4566 | miimon = 100; |
4567 | } | |
4568 | } | |
4569 | ||
4570 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4571 | 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", |
4572 | updelay); | |
1da177e4 LT |
4573 | } |
4574 | ||
4575 | if (!miimon) { | |
4576 | if (updelay || downdelay) { | |
4577 | /* just warn the user the up/down delay will have | |
4578 | * no effect since miimon is zero... | |
4579 | */ | |
a4aee5c8 JP |
4580 | 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", |
4581 | updelay, downdelay); | |
1da177e4 LT |
4582 | } |
4583 | } else { | |
4584 | /* don't allow arp monitoring */ | |
4585 | if (arp_interval) { | |
a4aee5c8 JP |
4586 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4587 | miimon, arp_interval); | |
1da177e4 LT |
4588 | arp_interval = 0; |
4589 | } | |
4590 | ||
4591 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4592 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4593 | updelay, miimon, | |
4594 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4595 | } |
4596 | ||
4597 | updelay /= miimon; | |
4598 | ||
4599 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4600 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4601 | downdelay, miimon, | |
4602 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4603 | } |
4604 | ||
4605 | downdelay /= miimon; | |
4606 | } | |
4607 | ||
4608 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4609 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4610 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4611 | arp_interval = BOND_LINK_ARP_INTERV; |
4612 | } | |
4613 | ||
4614 | for (arp_ip_count = 0; | |
4615 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4616 | arp_ip_count++) { | |
4617 | /* not complete check, but should be good enough to | |
4618 | catch mistakes */ | |
4619 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4620 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4621 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4622 | arp_interval = 0; |
4623 | } else { | |
d3bb52b0 | 4624 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4625 | arp_target[arp_ip_count] = ip; |
4626 | } | |
4627 | } | |
4628 | ||
4629 | if (arp_interval && !arp_ip_count) { | |
4630 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4631 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4632 | arp_interval); | |
1da177e4 LT |
4633 | arp_interval = 0; |
4634 | } | |
4635 | ||
f5b2b966 JV |
4636 | if (arp_validate) { |
4637 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4638 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4639 | return -EINVAL; |
4640 | } | |
4641 | if (!arp_interval) { | |
a4aee5c8 | 4642 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4643 | return -EINVAL; |
4644 | } | |
4645 | ||
4646 | arp_validate_value = bond_parse_parm(arp_validate, | |
4647 | arp_validate_tbl); | |
4648 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4649 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4650 | arp_validate == NULL ? "NULL" : arp_validate); |
4651 | return -EINVAL; | |
4652 | } | |
4653 | } else | |
4654 | arp_validate_value = 0; | |
4655 | ||
1da177e4 | 4656 | if (miimon) { |
a4aee5c8 | 4657 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4658 | } else if (arp_interval) { |
4659 | int i; | |
4660 | ||
a4aee5c8 JP |
4661 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4662 | arp_interval, | |
4663 | arp_validate_tbl[arp_validate_value].modename, | |
4664 | arp_ip_count); | |
1da177e4 LT |
4665 | |
4666 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4667 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4668 | |
e5e2a8fd | 4669 | pr_info("\n"); |
1da177e4 | 4670 | |
b8a9787e | 4671 | } else if (max_bonds) { |
1da177e4 LT |
4672 | /* miimon and arp_interval not set, we need one so things |
4673 | * work as expected, see bonding.txt for details | |
4674 | */ | |
b2730f4f | 4675 | 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 |
4676 | } |
4677 | ||
4678 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4679 | /* currently, using a primary only makes sense | |
4680 | * in active backup, TLB or ALB modes | |
4681 | */ | |
a4aee5c8 JP |
4682 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4683 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4684 | primary = NULL; |
4685 | } | |
4686 | ||
a549952a JP |
4687 | if (primary && primary_reselect) { |
4688 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4689 | pri_reselect_tbl); | |
4690 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4691 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4692 | primary_reselect == |
4693 | NULL ? "NULL" : primary_reselect); | |
4694 | return -EINVAL; | |
4695 | } | |
4696 | } else { | |
4697 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4698 | } | |
4699 | ||
3915c1e8 JV |
4700 | if (fail_over_mac) { |
4701 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4702 | fail_over_mac_tbl); | |
4703 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4704 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4705 | arp_validate == NULL ? "NULL" : arp_validate); |
4706 | return -EINVAL; | |
4707 | } | |
4708 | ||
4709 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4710 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4711 | } else { |
4712 | fail_over_mac_value = BOND_FOM_NONE; | |
4713 | } | |
dd957c57 | 4714 | |
1da177e4 LT |
4715 | /* fill params struct with the proper values */ |
4716 | params->mode = bond_mode; | |
169a3e66 | 4717 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4718 | params->miimon = miimon; |
ad246c99 | 4719 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4720 | params->arp_interval = arp_interval; |
f5b2b966 | 4721 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4722 | params->updelay = updelay; |
4723 | params->downdelay = downdelay; | |
4724 | params->use_carrier = use_carrier; | |
4725 | params->lacp_fast = lacp_fast; | |
4726 | params->primary[0] = 0; | |
a549952a | 4727 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4728 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4729 | params->tx_queues = tx_queues; |
ebd8e497 | 4730 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4731 | params->resend_igmp = resend_igmp; |
655f8919 | 4732 | params->min_links = min_links; |
1da177e4 LT |
4733 | |
4734 | if (primary) { | |
4735 | strncpy(params->primary, primary, IFNAMSIZ); | |
4736 | params->primary[IFNAMSIZ - 1] = 0; | |
4737 | } | |
4738 | ||
4739 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4740 | ||
4741 | return 0; | |
4742 | } | |
4743 | ||
0daa2303 | 4744 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4745 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4746 | |
e8a0464c DM |
4747 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4748 | struct netdev_queue *txq, | |
4749 | void *_unused) | |
c773e847 DM |
4750 | { |
4751 | lockdep_set_class(&txq->_xmit_lock, | |
4752 | &bonding_netdev_xmit_lock_key); | |
4753 | } | |
4754 | ||
4755 | static void bond_set_lockdep_class(struct net_device *dev) | |
4756 | { | |
cf508b12 DM |
4757 | lockdep_set_class(&dev->addr_list_lock, |
4758 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4759 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4760 | } |
4761 | ||
181470fc SH |
4762 | /* |
4763 | * Called from registration process | |
4764 | */ | |
4765 | static int bond_init(struct net_device *bond_dev) | |
4766 | { | |
4767 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4768 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4769 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4770 | |
4771 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4772 | ||
9fe0617d NH |
4773 | /* |
4774 | * Initialize locks that may be required during | |
4775 | * en/deslave operations. All of the bond_open work | |
4776 | * (of which this is part) should really be moved to | |
4777 | * a phase prior to dev_open | |
4778 | */ | |
4779 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4780 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4781 | ||
181470fc SH |
4782 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4783 | if (!bond->wq) | |
4784 | return -ENOMEM; | |
4785 | ||
4786 | bond_set_lockdep_class(bond_dev); | |
4787 | ||
181470fc | 4788 | bond_create_proc_entry(bond); |
ec87fd3b | 4789 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4790 | |
6151b3d4 | 4791 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4792 | |
f073c7ca TI |
4793 | bond_debug_register(bond); |
4794 | ||
22bedad3 | 4795 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4796 | return 0; |
4797 | } | |
4798 | ||
88ead977 EB |
4799 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4800 | { | |
4801 | if (tb[IFLA_ADDRESS]) { | |
4802 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4803 | return -EINVAL; | |
4804 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4805 | return -EADDRNOTAVAIL; | |
4806 | } | |
4807 | return 0; | |
4808 | } | |
4809 | ||
d5da4510 JP |
4810 | static int bond_get_tx_queues(struct net *net, struct nlattr *tb[], |
4811 | unsigned int *num_queues, | |
4812 | unsigned int *real_num_queues) | |
4813 | { | |
4814 | *num_queues = tx_queues; | |
4815 | return 0; | |
4816 | } | |
4817 | ||
88ead977 EB |
4818 | static struct rtnl_link_ops bond_link_ops __read_mostly = { |
4819 | .kind = "bond", | |
6639104b | 4820 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4821 | .setup = bond_setup, |
4822 | .validate = bond_validate, | |
d5da4510 | 4823 | .get_tx_queues = bond_get_tx_queues, |
88ead977 EB |
4824 | }; |
4825 | ||
dfe60397 | 4826 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4827 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4828 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4829 | * set up our sysfs entries. | |
4830 | */ | |
ec87fd3b | 4831 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4832 | { |
4833 | struct net_device *bond_dev; | |
4834 | int res; | |
4835 | ||
4836 | rtnl_lock(); | |
027ea041 | 4837 | |
1c5cae81 JP |
4838 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4839 | name ? name : "bond%d", | |
4840 | bond_setup, tx_queues); | |
dfe60397 | 4841 | if (!bond_dev) { |
a4aee5c8 | 4842 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4843 | rtnl_unlock(); |
4844 | return -ENOMEM; | |
dfe60397 MW |
4845 | } |
4846 | ||
ec87fd3b | 4847 | dev_net_set(bond_dev, net); |
88ead977 EB |
4848 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4849 | ||
dfe60397 | 4850 | res = register_netdevice(bond_dev); |
0daa2303 | 4851 | |
e826eafa PO |
4852 | netif_carrier_off(bond_dev); |
4853 | ||
7e083840 | 4854 | rtnl_unlock(); |
9e2e61fb AW |
4855 | if (res < 0) |
4856 | bond_destructor(bond_dev); | |
30c15ba9 | 4857 | return res; |
dfe60397 MW |
4858 | } |
4859 | ||
2c8c1e72 | 4860 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4861 | { |
15449745 | 4862 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4863 | |
4864 | bn->net = net; | |
4865 | INIT_LIST_HEAD(&bn->dev_list); | |
4866 | ||
ec87fd3b | 4867 | bond_create_proc_dir(bn); |
4c22400a | 4868 | bond_create_sysfs(bn); |
15449745 EB |
4869 | |
4870 | return 0; | |
ec87fd3b EB |
4871 | } |
4872 | ||
2c8c1e72 | 4873 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4874 | { |
15449745 | 4875 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b | 4876 | |
4c22400a | 4877 | bond_destroy_sysfs(bn); |
ec87fd3b | 4878 | bond_destroy_proc_dir(bn); |
ec87fd3b EB |
4879 | } |
4880 | ||
4881 | static struct pernet_operations bond_net_ops = { | |
4882 | .init = bond_net_init, | |
4883 | .exit = bond_net_exit, | |
15449745 EB |
4884 | .id = &bond_net_id, |
4885 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4886 | }; |
4887 | ||
1da177e4 LT |
4888 | static int __init bonding_init(void) |
4889 | { | |
1da177e4 LT |
4890 | int i; |
4891 | int res; | |
4892 | ||
bd33acc3 | 4893 | pr_info("%s", bond_version); |
1da177e4 | 4894 | |
dfe60397 | 4895 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4896 | if (res) |
dfe60397 | 4897 | goto out; |
1da177e4 | 4898 | |
15449745 | 4899 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4900 | if (res) |
4901 | goto out; | |
027ea041 | 4902 | |
88ead977 EB |
4903 | res = rtnl_link_register(&bond_link_ops); |
4904 | if (res) | |
6639104b | 4905 | goto err_link; |
88ead977 | 4906 | |
f073c7ca TI |
4907 | bond_create_debugfs(); |
4908 | ||
1da177e4 | 4909 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4910 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4911 | if (res) |
4912 | goto err; | |
1da177e4 LT |
4913 | } |
4914 | ||
1da177e4 | 4915 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4916 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
dfe60397 | 4917 | out: |
1da177e4 | 4918 | return res; |
88ead977 EB |
4919 | err: |
4920 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4921 | err_link: |
15449745 | 4922 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4923 | goto out; |
dfe60397 | 4924 | |
1da177e4 LT |
4925 | } |
4926 | ||
4927 | static void __exit bonding_exit(void) | |
4928 | { | |
4929 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4930 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4931 | |
f073c7ca | 4932 | bond_destroy_debugfs(); |
ae68c398 | 4933 | |
88ead977 | 4934 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 4935 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4936 | |
4937 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4938 | /* |
4939 | * Make sure we don't have an imbalance on our netpoll blocking | |
4940 | */ | |
4941 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4942 | #endif |
1da177e4 LT |
4943 | } |
4944 | ||
4945 | module_init(bonding_init); | |
4946 | module_exit(bonding_exit); | |
4947 | MODULE_LICENSE("GPL"); | |
4948 | MODULE_VERSION(DRV_VERSION); | |
4949 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4950 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 4951 | MODULE_ALIAS_RTNL_LINK("bond"); |