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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
a4aee5c8 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
3d632c3f | 56 | #include <linux/io.h> |
1da177e4 | 57 | #include <asm/dma.h> |
3d632c3f | 58 | #include <linux/uaccess.h> |
1da177e4 LT |
59 | #include <linux/errno.h> |
60 | #include <linux/netdevice.h> | |
61 | #include <linux/inetdevice.h> | |
a816c7c7 | 62 | #include <linux/igmp.h> |
1da177e4 LT |
63 | #include <linux/etherdevice.h> |
64 | #include <linux/skbuff.h> | |
65 | #include <net/sock.h> | |
66 | #include <linux/rtnetlink.h> | |
1da177e4 LT |
67 | #include <linux/smp.h> |
68 | #include <linux/if_ether.h> | |
69 | #include <net/arp.h> | |
70 | #include <linux/mii.h> | |
71 | #include <linux/ethtool.h> | |
72 | #include <linux/if_vlan.h> | |
73 | #include <linux/if_bonding.h> | |
b63bb739 | 74 | #include <linux/jiffies.h> |
e843fa50 | 75 | #include <linux/preempt.h> |
c3ade5ca | 76 | #include <net/route.h> |
457c4cbc | 77 | #include <net/net_namespace.h> |
ec87fd3b | 78 | #include <net/netns/generic.h> |
1da177e4 LT |
79 | #include "bonding.h" |
80 | #include "bond_3ad.h" | |
81 | #include "bond_alb.h" | |
82 | ||
83 | /*---------------------------- Module parameters ----------------------------*/ | |
84 | ||
85 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
86 | #define BOND_LINK_MON_INTERV 0 | |
87 | #define BOND_LINK_ARP_INTERV 0 | |
88 | ||
89 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 90 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
ad246c99 | 91 | static int num_peer_notif = 1; |
1da177e4 | 92 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
93 | static int updelay; |
94 | static int downdelay; | |
1da177e4 | 95 | static int use_carrier = 1; |
3d632c3f SH |
96 | static char *mode; |
97 | static char *primary; | |
a549952a | 98 | static char *primary_reselect; |
3d632c3f | 99 | static char *lacp_rate; |
655f8919 | 100 | static int min_links; |
3d632c3f SH |
101 | static char *ad_select; |
102 | static char *xmit_hash_policy; | |
1da177e4 | 103 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
104 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
105 | static char *arp_validate; | |
106 | static char *fail_over_mac; | |
ebd8e497 | 107 | static int all_slaves_active = 0; |
d2991f75 | 108 | static struct bond_params bonding_defaults; |
c2952c31 | 109 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
1da177e4 LT |
110 | |
111 | module_param(max_bonds, int, 0); | |
112 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
113 | module_param(tx_queues, int, 0); |
114 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
ad246c99 | 115 | module_param_named(num_grat_arp, num_peer_notif, int, 0644); |
90e62474 AG |
116 | MODULE_PARM_DESC(num_grat_arp, "Number of peer notifications to send on " |
117 | "failover event (alias of num_unsol_na)"); | |
ad246c99 | 118 | module_param_named(num_unsol_na, num_peer_notif, int, 0644); |
90e62474 AG |
119 | MODULE_PARM_DESC(num_unsol_na, "Number of peer notifications to send on " |
120 | "failover event (alias of num_grat_arp)"); | |
1da177e4 LT |
121 | module_param(miimon, int, 0); |
122 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
123 | module_param(updelay, int, 0); | |
124 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
125 | module_param(downdelay, int, 0); | |
2ac47660 MW |
126 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
127 | "in milliseconds"); | |
1da177e4 | 128 | module_param(use_carrier, int, 0); |
2ac47660 MW |
129 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
130 | "0 for off, 1 for on (default)"); | |
1da177e4 | 131 | module_param(mode, charp, 0); |
90e62474 | 132 | MODULE_PARM_DESC(mode, "Mode of operation; 0 for balance-rr, " |
2ac47660 MW |
133 | "1 for active-backup, 2 for balance-xor, " |
134 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
135 | "6 for balance-alb"); | |
1da177e4 LT |
136 | module_param(primary, charp, 0); |
137 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
138 | module_param(primary_reselect, charp, 0); |
139 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
140 | "once it comes up; " | |
141 | "0 for always (default), " | |
142 | "1 for only if speed of primary is " | |
143 | "better, " | |
144 | "2 for only on active slave " | |
145 | "failure"); | |
1da177e4 | 146 | module_param(lacp_rate, charp, 0); |
90e62474 AG |
147 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner; " |
148 | "0 for slow, 1 for fast"); | |
fd989c83 | 149 | module_param(ad_select, charp, 0); |
90e62474 AG |
150 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic; " |
151 | "0 for stable (default), 1 for bandwidth, " | |
152 | "2 for count"); | |
655f8919 | 153 | module_param(min_links, int, 0); |
154 | MODULE_PARM_DESC(min_links, "Minimum number of available links before turning on carrier"); | |
155 | ||
169a3e66 | 156 | module_param(xmit_hash_policy, charp, 0); |
90e62474 AG |
157 | MODULE_PARM_DESC(xmit_hash_policy, "balance-xor and 802.3ad hashing method; " |
158 | "0 for layer 2 (default), 1 for layer 3+4, " | |
159 | "2 for layer 2+3"); | |
1da177e4 LT |
160 | module_param(arp_interval, int, 0); |
161 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
162 | module_param_array(arp_ip_target, charp, NULL, 0); | |
163 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 | 164 | module_param(arp_validate, charp, 0); |
90e62474 AG |
165 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes; " |
166 | "0 for none (default), 1 for active, " | |
167 | "2 for backup, 3 for all"); | |
3915c1e8 | 168 | module_param(fail_over_mac, charp, 0); |
90e62474 AG |
169 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to " |
170 | "the same MAC; 0 for none (default), " | |
171 | "1 for active, 2 for follow"); | |
ebd8e497 AG |
172 | module_param(all_slaves_active, int, 0); |
173 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
90e62474 | 174 | "by setting active flag for all slaves; " |
ebd8e497 | 175 | "0 for never (default), 1 for always."); |
c2952c31 | 176 | module_param(resend_igmp, int, 0); |
90e62474 AG |
177 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on " |
178 | "link failure"); | |
1da177e4 LT |
179 | |
180 | /*----------------------------- Global variables ----------------------------*/ | |
181 | ||
e843fa50 | 182 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 183 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
184 | #endif |
185 | ||
f99189b1 | 186 | int bond_net_id __read_mostly; |
1da177e4 | 187 | |
3d632c3f SH |
188 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
189 | static int arp_ip_count; | |
1da177e4 | 190 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
191 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
192 | static int lacp_fast; | |
1da177e4 | 193 | |
e97fd7c6 | 194 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
195 | { "slow", AD_LACP_SLOW}, |
196 | { "fast", AD_LACP_FAST}, | |
197 | { NULL, -1}, | |
198 | }; | |
199 | ||
e97fd7c6 | 200 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
201 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
202 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
203 | { "balance-xor", BOND_MODE_XOR}, | |
204 | { "broadcast", BOND_MODE_BROADCAST}, | |
205 | { "802.3ad", BOND_MODE_8023AD}, | |
206 | { "balance-tlb", BOND_MODE_TLB}, | |
207 | { "balance-alb", BOND_MODE_ALB}, | |
208 | { NULL, -1}, | |
209 | }; | |
210 | ||
e97fd7c6 | 211 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
212 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
213 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 214 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
215 | { NULL, -1}, |
216 | }; | |
217 | ||
e97fd7c6 | 218 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
219 | { "none", BOND_ARP_VALIDATE_NONE}, |
220 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
221 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
222 | { "all", BOND_ARP_VALIDATE_ALL}, | |
223 | { NULL, -1}, | |
224 | }; | |
225 | ||
e97fd7c6 | 226 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
227 | { "none", BOND_FOM_NONE}, |
228 | { "active", BOND_FOM_ACTIVE}, | |
229 | { "follow", BOND_FOM_FOLLOW}, | |
230 | { NULL, -1}, | |
231 | }; | |
232 | ||
a549952a JP |
233 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
234 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
235 | { "better", BOND_PRI_RESELECT_BETTER}, | |
236 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
237 | { NULL, -1}, | |
238 | }; | |
239 | ||
fd989c83 JV |
240 | struct bond_parm_tbl ad_select_tbl[] = { |
241 | { "stable", BOND_AD_STABLE}, | |
242 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
243 | { "count", BOND_AD_COUNT}, | |
244 | { NULL, -1}, | |
245 | }; | |
246 | ||
1da177e4 LT |
247 | /*-------------------------- Forward declarations ---------------------------*/ |
248 | ||
181470fc | 249 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 250 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
251 | |
252 | /*---------------------------- General routines -----------------------------*/ | |
253 | ||
bd33acc3 | 254 | const char *bond_mode_name(int mode) |
1da177e4 | 255 | { |
77afc92b HE |
256 | static const char *names[] = { |
257 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
258 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
259 | [BOND_MODE_XOR] = "load balancing (xor)", | |
260 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 261 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
262 | [BOND_MODE_TLB] = "transmit load balancing", |
263 | [BOND_MODE_ALB] = "adaptive load balancing", | |
264 | }; | |
265 | ||
266 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 267 | return "unknown"; |
77afc92b HE |
268 | |
269 | return names[mode]; | |
1da177e4 LT |
270 | } |
271 | ||
272 | /*---------------------------------- VLAN -----------------------------------*/ | |
273 | ||
274 | /** | |
275 | * bond_add_vlan - add a new vlan id on bond | |
276 | * @bond: bond that got the notification | |
277 | * @vlan_id: the vlan id to add | |
278 | * | |
279 | * Returns -ENOMEM if allocation failed. | |
280 | */ | |
281 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
282 | { | |
283 | struct vlan_entry *vlan; | |
284 | ||
5a03cdb7 | 285 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 286 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 287 | |
305d552a | 288 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 289 | if (!vlan) |
1da177e4 | 290 | return -ENOMEM; |
1da177e4 LT |
291 | |
292 | INIT_LIST_HEAD(&vlan->vlan_list); | |
293 | vlan->vlan_id = vlan_id; | |
294 | ||
295 | write_lock_bh(&bond->lock); | |
296 | ||
297 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
298 | ||
299 | write_unlock_bh(&bond->lock); | |
300 | ||
5a03cdb7 | 301 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
302 | |
303 | return 0; | |
304 | } | |
305 | ||
306 | /** | |
307 | * bond_del_vlan - delete a vlan id from bond | |
308 | * @bond: bond that got the notification | |
309 | * @vlan_id: the vlan id to delete | |
310 | * | |
311 | * returns -ENODEV if @vlan_id was not found in @bond. | |
312 | */ | |
313 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
314 | { | |
0883beca | 315 | struct vlan_entry *vlan; |
1da177e4 LT |
316 | int res = -ENODEV; |
317 | ||
5a03cdb7 | 318 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 | 319 | |
e843fa50 | 320 | block_netpoll_tx(); |
1da177e4 LT |
321 | write_lock_bh(&bond->lock); |
322 | ||
0883beca | 323 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
324 | if (vlan->vlan_id == vlan_id) { |
325 | list_del(&vlan->vlan_list); | |
326 | ||
58402054 | 327 | if (bond_is_lb(bond)) |
1da177e4 | 328 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 329 | |
a4aee5c8 JP |
330 | pr_debug("removed VLAN ID %d from bond %s\n", |
331 | vlan_id, bond->dev->name); | |
1da177e4 LT |
332 | |
333 | kfree(vlan); | |
334 | ||
1da177e4 LT |
335 | res = 0; |
336 | goto out; | |
337 | } | |
338 | } | |
339 | ||
a4aee5c8 JP |
340 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
341 | vlan_id, bond->dev->name); | |
1da177e4 LT |
342 | |
343 | out: | |
344 | write_unlock_bh(&bond->lock); | |
e843fa50 | 345 | unblock_netpoll_tx(); |
1da177e4 LT |
346 | return res; |
347 | } | |
348 | ||
1da177e4 LT |
349 | /** |
350 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
351 | * @bond: the bond we're working on | |
352 | * @curr: item we're advancing from | |
353 | * | |
354 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
355 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 356 | * |
1da177e4 LT |
357 | * Caller must hold bond->lock |
358 | */ | |
359 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
360 | { | |
361 | struct vlan_entry *next, *last; | |
362 | ||
3d632c3f | 363 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 364 | return NULL; |
1da177e4 LT |
365 | |
366 | if (!curr) { | |
367 | next = list_entry(bond->vlan_list.next, | |
368 | struct vlan_entry, vlan_list); | |
369 | } else { | |
370 | last = list_entry(bond->vlan_list.prev, | |
371 | struct vlan_entry, vlan_list); | |
372 | if (last == curr) { | |
373 | next = list_entry(bond->vlan_list.next, | |
374 | struct vlan_entry, vlan_list); | |
375 | } else { | |
376 | next = list_entry(curr->vlan_list.next, | |
377 | struct vlan_entry, vlan_list); | |
378 | } | |
379 | } | |
380 | ||
381 | return next; | |
382 | } | |
383 | ||
374eeb5a NH |
384 | #define bond_queue_mapping(skb) (*(u16 *)((skb)->cb)) |
385 | ||
1da177e4 LT |
386 | /** |
387 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 388 | * |
1da177e4 LT |
389 | * @bond: bond device that got this skb for tx. |
390 | * @skb: hw accel VLAN tagged skb to transmit | |
391 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 392 | */ |
3d632c3f SH |
393 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
394 | struct net_device *slave_dev) | |
1da177e4 | 395 | { |
8387451e | 396 | skb->dev = slave_dev; |
374eeb5a NH |
397 | |
398 | skb->queue_mapping = bond_queue_mapping(skb); | |
399 | ||
080e4130 | 400 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 401 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 402 | else |
f6dc31a8 | 403 | dev_queue_xmit(skb); |
1da177e4 LT |
404 | |
405 | return 0; | |
406 | } | |
407 | ||
408 | /* | |
cc0e4070 JP |
409 | * In the following 2 functions, bond_vlan_rx_add_vid and bond_vlan_rx_kill_vid, |
410 | * We don't protect the slave list iteration with a lock because: | |
1da177e4 LT |
411 | * a. This operation is performed in IOCTL context, |
412 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
413 | * c. Holding a lock with BH disabled while directly calling a base driver | |
414 | * entry point is generally a BAD idea. | |
3d632c3f | 415 | * |
1da177e4 LT |
416 | * The design of synchronization/protection for this operation in the 8021q |
417 | * module is good for one or more VLAN devices over a single physical device | |
418 | * and cannot be extended for a teaming solution like bonding, so there is a | |
419 | * potential race condition here where a net device from the vlan group might | |
420 | * be referenced (either by a base driver or the 8021q code) while it is being | |
421 | * removed from the system. However, it turns out we're not making matters | |
422 | * worse, and if it works for regular VLAN usage it will work here too. | |
423 | */ | |
424 | ||
1da177e4 LT |
425 | /** |
426 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
427 | * @bond_dev: bonding net device that got called | |
428 | * @vid: vlan id being added | |
429 | */ | |
8e586137 | 430 | static int bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) |
1da177e4 | 431 | { |
454d7c9b | 432 | struct bonding *bond = netdev_priv(bond_dev); |
87002b03 | 433 | struct slave *slave, *stop_at; |
1da177e4 LT |
434 | int i, res; |
435 | ||
436 | bond_for_each_slave(bond, slave, i) { | |
87002b03 JP |
437 | res = vlan_vid_add(slave->dev, vid); |
438 | if (res) | |
439 | goto unwind; | |
1da177e4 LT |
440 | } |
441 | ||
442 | res = bond_add_vlan(bond, vid); | |
443 | if (res) { | |
a4aee5c8 | 444 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 | 445 | bond_dev->name, vid); |
8e586137 | 446 | return res; |
1da177e4 | 447 | } |
8e586137 JP |
448 | |
449 | return 0; | |
87002b03 JP |
450 | |
451 | unwind: | |
452 | /* unwind from head to the slave that failed */ | |
453 | stop_at = slave; | |
454 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) | |
455 | vlan_vid_del(slave->dev, vid); | |
456 | ||
457 | return res; | |
1da177e4 LT |
458 | } |
459 | ||
460 | /** | |
461 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
462 | * @bond_dev: bonding net device that got called | |
463 | * @vid: vlan id being removed | |
464 | */ | |
8e586137 | 465 | static int bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) |
1da177e4 | 466 | { |
454d7c9b | 467 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 468 | struct slave *slave; |
1da177e4 LT |
469 | int i, res; |
470 | ||
87002b03 JP |
471 | bond_for_each_slave(bond, slave, i) |
472 | vlan_vid_del(slave->dev, vid); | |
1da177e4 LT |
473 | |
474 | res = bond_del_vlan(bond, vid); | |
475 | if (res) { | |
a4aee5c8 | 476 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 | 477 | bond_dev->name, vid); |
8e586137 | 478 | return res; |
1da177e4 | 479 | } |
8e586137 JP |
480 | |
481 | return 0; | |
1da177e4 LT |
482 | } |
483 | ||
484 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
485 | { | |
486 | struct vlan_entry *vlan; | |
87002b03 | 487 | int res; |
1da177e4 | 488 | |
87002b03 JP |
489 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
490 | res = vlan_vid_add(slave_dev, vlan->vlan_id); | |
491 | if (res) | |
492 | pr_warning("%s: Failed to add vlan id %d to device %s\n", | |
493 | bond->dev->name, vlan->vlan_id, | |
494 | slave_dev->name); | |
495 | } | |
1da177e4 LT |
496 | } |
497 | ||
3d632c3f SH |
498 | static void bond_del_vlans_from_slave(struct bonding *bond, |
499 | struct net_device *slave_dev) | |
1da177e4 LT |
500 | { |
501 | struct vlan_entry *vlan; | |
1da177e4 | 502 | |
1da177e4 | 503 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
504 | if (!vlan->vlan_id) |
505 | continue; | |
87002b03 | 506 | vlan_vid_del(slave_dev, vlan->vlan_id); |
1da177e4 | 507 | } |
1da177e4 LT |
508 | } |
509 | ||
510 | /*------------------------------- Link status -------------------------------*/ | |
511 | ||
ff59c456 JV |
512 | /* |
513 | * Set the carrier state for the master according to the state of its | |
514 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
515 | * do special 802.3ad magic. | |
516 | * | |
517 | * Returns zero if carrier state does not change, nonzero if it does. | |
518 | */ | |
519 | static int bond_set_carrier(struct bonding *bond) | |
520 | { | |
521 | struct slave *slave; | |
522 | int i; | |
523 | ||
524 | if (bond->slave_cnt == 0) | |
525 | goto down; | |
526 | ||
527 | if (bond->params.mode == BOND_MODE_8023AD) | |
528 | return bond_3ad_set_carrier(bond); | |
529 | ||
530 | bond_for_each_slave(bond, slave, i) { | |
531 | if (slave->link == BOND_LINK_UP) { | |
532 | if (!netif_carrier_ok(bond->dev)) { | |
533 | netif_carrier_on(bond->dev); | |
534 | return 1; | |
535 | } | |
536 | return 0; | |
537 | } | |
538 | } | |
539 | ||
540 | down: | |
541 | if (netif_carrier_ok(bond->dev)) { | |
542 | netif_carrier_off(bond->dev); | |
543 | return 1; | |
544 | } | |
545 | return 0; | |
546 | } | |
547 | ||
1da177e4 LT |
548 | /* |
549 | * Get link speed and duplex from the slave's base driver | |
550 | * using ethtool. If for some reason the call fails or the | |
98f41f69 | 551 | * values are invalid, set speed and duplex to -1, |
1da177e4 LT |
552 | * and return error. |
553 | */ | |
554 | static int bond_update_speed_duplex(struct slave *slave) | |
555 | { | |
556 | struct net_device *slave_dev = slave->dev; | |
4bc71cb9 | 557 | struct ethtool_cmd ecmd; |
5d30530e | 558 | u32 slave_speed; |
61a44b9c | 559 | int res; |
1da177e4 | 560 | |
589665f5 DC |
561 | slave->speed = SPEED_UNKNOWN; |
562 | slave->duplex = DUPLEX_UNKNOWN; | |
1da177e4 | 563 | |
4bc71cb9 | 564 | res = __ethtool_get_settings(slave_dev, &ecmd); |
61a44b9c | 565 | if (res < 0) |
1da177e4 | 566 | return -1; |
1da177e4 | 567 | |
4bc71cb9 | 568 | slave_speed = ethtool_cmd_speed(&ecmd); |
6f92c66f | 569 | if (slave_speed == 0 || slave_speed == ((__u32) -1)) |
1da177e4 | 570 | return -1; |
1da177e4 | 571 | |
4bc71cb9 | 572 | switch (ecmd.duplex) { |
1da177e4 LT |
573 | case DUPLEX_FULL: |
574 | case DUPLEX_HALF: | |
575 | break; | |
576 | default: | |
577 | return -1; | |
578 | } | |
579 | ||
5d30530e | 580 | slave->speed = slave_speed; |
4bc71cb9 | 581 | slave->duplex = ecmd.duplex; |
1da177e4 LT |
582 | |
583 | return 0; | |
584 | } | |
585 | ||
586 | /* | |
587 | * if <dev> supports MII link status reporting, check its link status. | |
588 | * | |
589 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 590 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
591 | * |
592 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
593 | * can't tell and just pretend it is), or 0, meaning that the link is | |
594 | * down. | |
595 | * | |
596 | * If reporting is non-zero, instead of faking link up, return -1 if | |
597 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
598 | * support them). If use_carrier is set, return whatever it says. | |
599 | * It'd be nice if there was a good way to tell if a driver supports | |
600 | * netif_carrier, but there really isn't. | |
601 | */ | |
3d632c3f SH |
602 | static int bond_check_dev_link(struct bonding *bond, |
603 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 604 | { |
eb7cc59a | 605 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 606 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
607 | struct ifreq ifr; |
608 | struct mii_ioctl_data *mii; | |
1da177e4 | 609 | |
6c988853 PG |
610 | if (!reporting && !netif_running(slave_dev)) |
611 | return 0; | |
612 | ||
eb7cc59a | 613 | if (bond->params.use_carrier) |
1da177e4 | 614 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 615 | |
29112f4e JP |
616 | /* Try to get link status using Ethtool first. */ |
617 | if (slave_dev->ethtool_ops) { | |
618 | if (slave_dev->ethtool_ops->get_link) { | |
619 | u32 link; | |
620 | ||
621 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
622 | ||
623 | return link ? BMSR_LSTATUS : 0; | |
624 | } | |
625 | } | |
626 | ||
3d632c3f | 627 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 628 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
629 | if (ioctl) { |
630 | /* TODO: set pointer to correct ioctl on a per team member */ | |
631 | /* bases to make this more efficient. that is, once */ | |
632 | /* we determine the correct ioctl, we will always */ | |
633 | /* call it and not the others for that team */ | |
634 | /* member. */ | |
635 | ||
636 | /* | |
637 | * We cannot assume that SIOCGMIIPHY will also read a | |
638 | * register; not all network drivers (e.g., e100) | |
639 | * support that. | |
640 | */ | |
641 | ||
642 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
643 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
644 | mii = if_mii(&ifr); | |
645 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
646 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
647 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
648 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
649 | } |
650 | } | |
651 | ||
1da177e4 LT |
652 | /* |
653 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 654 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
655 | * cannot report link status). If not reporting, pretend |
656 | * we're ok. | |
657 | */ | |
3d632c3f | 658 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
659 | } |
660 | ||
661 | /*----------------------------- Multicast list ------------------------------*/ | |
662 | ||
1da177e4 LT |
663 | /* |
664 | * Push the promiscuity flag down to appropriate slaves | |
665 | */ | |
7e1a1ac1 | 666 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 667 | { |
7e1a1ac1 | 668 | int err = 0; |
1da177e4 LT |
669 | if (USES_PRIMARY(bond->params.mode)) { |
670 | /* write lock already acquired */ | |
671 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
672 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
673 | inc); | |
1da177e4 LT |
674 | } |
675 | } else { | |
676 | struct slave *slave; | |
677 | int i; | |
678 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
679 | err = dev_set_promiscuity(slave->dev, inc); |
680 | if (err) | |
681 | return err; | |
1da177e4 LT |
682 | } |
683 | } | |
7e1a1ac1 | 684 | return err; |
1da177e4 LT |
685 | } |
686 | ||
687 | /* | |
688 | * Push the allmulti flag down to all slaves | |
689 | */ | |
7e1a1ac1 | 690 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 691 | { |
7e1a1ac1 | 692 | int err = 0; |
1da177e4 LT |
693 | if (USES_PRIMARY(bond->params.mode)) { |
694 | /* write lock already acquired */ | |
695 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
696 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
697 | inc); | |
1da177e4 LT |
698 | } |
699 | } else { | |
700 | struct slave *slave; | |
701 | int i; | |
702 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
703 | err = dev_set_allmulti(slave->dev, inc); |
704 | if (err) | |
705 | return err; | |
1da177e4 LT |
706 | } |
707 | } | |
7e1a1ac1 | 708 | return err; |
1da177e4 LT |
709 | } |
710 | ||
711 | /* | |
712 | * Add a Multicast address to slaves | |
713 | * according to mode | |
714 | */ | |
22bedad3 | 715 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
716 | { |
717 | if (USES_PRIMARY(bond->params.mode)) { | |
718 | /* write lock already acquired */ | |
3d632c3f | 719 | if (bond->curr_active_slave) |
22bedad3 | 720 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
721 | } else { |
722 | struct slave *slave; | |
723 | int i; | |
3d632c3f SH |
724 | |
725 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 726 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
727 | } |
728 | } | |
729 | ||
730 | /* | |
731 | * Remove a multicast address from slave | |
732 | * according to mode | |
733 | */ | |
22bedad3 | 734 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
735 | { |
736 | if (USES_PRIMARY(bond->params.mode)) { | |
737 | /* write lock already acquired */ | |
3d632c3f | 738 | if (bond->curr_active_slave) |
22bedad3 | 739 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
740 | } else { |
741 | struct slave *slave; | |
742 | int i; | |
743 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 744 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
745 | } |
746 | } | |
747 | } | |
748 | ||
a816c7c7 | 749 | |
5a37e8ca | 750 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
751 | { |
752 | struct in_device *in_dev; | |
a816c7c7 JV |
753 | |
754 | rcu_read_lock(); | |
5a37e8ca | 755 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 756 | if (in_dev) |
24912420 | 757 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
758 | rcu_read_unlock(); |
759 | } | |
760 | ||
5a37e8ca FL |
761 | /* |
762 | * Retrieve the list of registered multicast addresses for the bonding | |
763 | * device and retransmit an IGMP JOIN request to the current active | |
764 | * slave. | |
765 | */ | |
766 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
767 | { | |
1c3ac428 | 768 | struct net_device *bond_dev, *vlan_dev, *master_dev; |
5a37e8ca FL |
769 | struct vlan_entry *vlan; |
770 | ||
771 | read_lock(&bond->lock); | |
772 | ||
1c3ac428 PP |
773 | bond_dev = bond->dev; |
774 | ||
5a37e8ca | 775 | /* rejoin all groups on bond device */ |
1c3ac428 PP |
776 | __bond_resend_igmp_join_requests(bond_dev); |
777 | ||
778 | /* | |
779 | * if bond is enslaved to a bridge, | |
780 | * then rejoin all groups on its master | |
781 | */ | |
782 | master_dev = bond_dev->master; | |
783 | if (master_dev) | |
784 | if ((master_dev->priv_flags & IFF_EBRIDGE) | |
785 | && (bond_dev->priv_flags & IFF_BRIDGE_PORT)) | |
786 | __bond_resend_igmp_join_requests(master_dev); | |
5a37e8ca FL |
787 | |
788 | /* rejoin all groups on vlan devices */ | |
cc0e4070 JP |
789 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
790 | rcu_read_lock(); | |
1c3ac428 | 791 | vlan_dev = __vlan_find_dev_deep(bond_dev, |
cc0e4070 JP |
792 | vlan->vlan_id); |
793 | rcu_read_unlock(); | |
794 | if (vlan_dev) | |
795 | __bond_resend_igmp_join_requests(vlan_dev); | |
5a37e8ca FL |
796 | } |
797 | ||
e6d265e8 | 798 | if (--bond->igmp_retrans > 0) |
c2952c31 | 799 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); |
e6d265e8 | 800 | |
5a37e8ca FL |
801 | read_unlock(&bond->lock); |
802 | } | |
803 | ||
379b7383 | 804 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
805 | { |
806 | struct bonding *bond = container_of(work, struct bonding, | |
94265cf5 | 807 | mcast_work.work); |
5a37e8ca FL |
808 | bond_resend_igmp_join_requests(bond); |
809 | } | |
810 | ||
1da177e4 LT |
811 | /* |
812 | * flush all members of flush->mc_list from device dev->mc_list | |
813 | */ | |
3d632c3f SH |
814 | static void bond_mc_list_flush(struct net_device *bond_dev, |
815 | struct net_device *slave_dev) | |
1da177e4 | 816 | { |
454d7c9b | 817 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 818 | struct netdev_hw_addr *ha; |
1da177e4 | 819 | |
22bedad3 JP |
820 | netdev_for_each_mc_addr(ha, bond_dev) |
821 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
822 | |
823 | if (bond->params.mode == BOND_MODE_8023AD) { | |
824 | /* del lacpdu mc addr from mc list */ | |
825 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
826 | ||
22bedad3 | 827 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
828 | } |
829 | } | |
830 | ||
831 | /*--------------------------- Active slave change ---------------------------*/ | |
832 | ||
833 | /* | |
834 | * Update the mc list and multicast-related flags for the new and | |
835 | * old active slaves (if any) according to the multicast mode, and | |
836 | * promiscuous flags unconditionally. | |
837 | */ | |
3d632c3f SH |
838 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
839 | struct slave *old_active) | |
1da177e4 | 840 | { |
22bedad3 | 841 | struct netdev_hw_addr *ha; |
1da177e4 | 842 | |
3d632c3f | 843 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
844 | /* nothing to do - mc list is already up-to-date on |
845 | * all slaves | |
846 | */ | |
847 | return; | |
1da177e4 LT |
848 | |
849 | if (old_active) { | |
3d632c3f | 850 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 851 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 852 | |
3d632c3f | 853 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 854 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 855 | |
22bedad3 JP |
856 | netdev_for_each_mc_addr(ha, bond->dev) |
857 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
858 | } |
859 | ||
860 | if (new_active) { | |
7e1a1ac1 | 861 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 862 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 863 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 864 | |
3d632c3f | 865 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 866 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 867 | |
22bedad3 JP |
868 | netdev_for_each_mc_addr(ha, bond->dev) |
869 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
870 | } |
871 | } | |
872 | ||
3915c1e8 JV |
873 | /* |
874 | * bond_do_fail_over_mac | |
875 | * | |
876 | * Perform special MAC address swapping for fail_over_mac settings | |
877 | * | |
878 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
879 | */ | |
880 | static void bond_do_fail_over_mac(struct bonding *bond, | |
881 | struct slave *new_active, | |
882 | struct slave *old_active) | |
1f78d9f9 HE |
883 | __releases(&bond->curr_slave_lock) |
884 | __releases(&bond->lock) | |
885 | __acquires(&bond->lock) | |
886 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
887 | { |
888 | u8 tmp_mac[ETH_ALEN]; | |
889 | struct sockaddr saddr; | |
890 | int rv; | |
891 | ||
892 | switch (bond->params.fail_over_mac) { | |
893 | case BOND_FOM_ACTIVE: | |
7d26bb10 | 894 | if (new_active) { |
3915c1e8 JV |
895 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, |
896 | new_active->dev->addr_len); | |
7d26bb10 WP |
897 | write_unlock_bh(&bond->curr_slave_lock); |
898 | read_unlock(&bond->lock); | |
899 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); | |
900 | read_lock(&bond->lock); | |
901 | write_lock_bh(&bond->curr_slave_lock); | |
902 | } | |
3915c1e8 JV |
903 | break; |
904 | case BOND_FOM_FOLLOW: | |
905 | /* | |
906 | * if new_active && old_active, swap them | |
907 | * if just old_active, do nothing (going to no active slave) | |
908 | * if just new_active, set new_active to bond's MAC | |
909 | */ | |
910 | if (!new_active) | |
911 | return; | |
912 | ||
913 | write_unlock_bh(&bond->curr_slave_lock); | |
914 | read_unlock(&bond->lock); | |
915 | ||
916 | if (old_active) { | |
917 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
918 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
919 | ETH_ALEN); | |
920 | saddr.sa_family = new_active->dev->type; | |
921 | } else { | |
922 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
923 | saddr.sa_family = bond->dev->type; | |
924 | } | |
925 | ||
926 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
927 | if (rv) { | |
a4aee5c8 | 928 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
929 | bond->dev->name, -rv, new_active->dev->name); |
930 | goto out; | |
931 | } | |
932 | ||
933 | if (!old_active) | |
934 | goto out; | |
935 | ||
936 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
937 | saddr.sa_family = old_active->dev->type; | |
938 | ||
939 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
940 | if (rv) | |
a4aee5c8 | 941 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
942 | bond->dev->name, -rv, new_active->dev->name); |
943 | out: | |
944 | read_lock(&bond->lock); | |
945 | write_lock_bh(&bond->curr_slave_lock); | |
946 | break; | |
947 | default: | |
a4aee5c8 | 948 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
949 | bond->dev->name, bond->params.fail_over_mac); |
950 | break; | |
951 | } | |
952 | ||
953 | } | |
954 | ||
a549952a JP |
955 | static bool bond_should_change_active(struct bonding *bond) |
956 | { | |
957 | struct slave *prim = bond->primary_slave; | |
958 | struct slave *curr = bond->curr_active_slave; | |
959 | ||
960 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
961 | return true; | |
962 | if (bond->force_primary) { | |
963 | bond->force_primary = false; | |
964 | return true; | |
965 | } | |
966 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
967 | (prim->speed < curr->speed || | |
968 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
969 | return false; | |
970 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
971 | return false; | |
972 | return true; | |
973 | } | |
3915c1e8 | 974 | |
1da177e4 LT |
975 | /** |
976 | * find_best_interface - select the best available slave to be the active one | |
977 | * @bond: our bonding struct | |
978 | * | |
979 | * Warning: Caller must hold curr_slave_lock for writing. | |
980 | */ | |
981 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
982 | { | |
983 | struct slave *new_active, *old_active; | |
984 | struct slave *bestslave = NULL; | |
985 | int mintime = bond->params.updelay; | |
986 | int i; | |
987 | ||
49b4ad92 | 988 | new_active = bond->curr_active_slave; |
1da177e4 LT |
989 | |
990 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 991 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 992 | new_active = bond->first_slave; |
3d632c3f | 993 | else |
1da177e4 | 994 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
995 | } |
996 | ||
1da177e4 | 997 | if ((bond->primary_slave) && |
a549952a JP |
998 | bond->primary_slave->link == BOND_LINK_UP && |
999 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1000 | new_active = bond->primary_slave; |
1001 | } | |
1002 | ||
1003 | /* remember where to stop iterating over the slaves */ | |
1004 | old_active = new_active; | |
1005 | ||
1006 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1007 | if (new_active->link == BOND_LINK_UP) { |
1008 | return new_active; | |
1009 | } else if (new_active->link == BOND_LINK_BACK && | |
1010 | IS_UP(new_active->dev)) { | |
1011 | /* link up, but waiting for stabilization */ | |
1012 | if (new_active->delay < mintime) { | |
1013 | mintime = new_active->delay; | |
1014 | bestslave = new_active; | |
1da177e4 LT |
1015 | } |
1016 | } | |
1017 | } | |
1018 | ||
1019 | return bestslave; | |
1020 | } | |
1021 | ||
ad246c99 BH |
1022 | static bool bond_should_notify_peers(struct bonding *bond) |
1023 | { | |
1024 | struct slave *slave = bond->curr_active_slave; | |
1025 | ||
1026 | pr_debug("bond_should_notify_peers: bond %s slave %s\n", | |
1027 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
1028 | ||
1029 | if (!slave || !bond->send_peer_notif || | |
1030 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
1031 | return false; | |
1032 | ||
1033 | bond->send_peer_notif--; | |
1034 | return true; | |
1035 | } | |
1036 | ||
1da177e4 LT |
1037 | /** |
1038 | * change_active_interface - change the active slave into the specified one | |
1039 | * @bond: our bonding struct | |
1040 | * @new: the new slave to make the active one | |
1041 | * | |
1042 | * Set the new slave to the bond's settings and unset them on the old | |
1043 | * curr_active_slave. | |
1044 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1045 | * | |
1046 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1047 | * because it is apparently the best available slave we have, even though its | |
1048 | * updelay hasn't timed out yet. | |
1049 | * | |
3915c1e8 JV |
1050 | * If new_active is not NULL, caller must hold bond->lock for read and |
1051 | * curr_slave_lock for write_bh. | |
1da177e4 | 1052 | */ |
a77b5325 | 1053 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1054 | { |
1055 | struct slave *old_active = bond->curr_active_slave; | |
1056 | ||
3d632c3f | 1057 | if (old_active == new_active) |
1da177e4 | 1058 | return; |
1da177e4 LT |
1059 | |
1060 | if (new_active) { | |
b2220cad JV |
1061 | new_active->jiffies = jiffies; |
1062 | ||
1da177e4 LT |
1063 | if (new_active->link == BOND_LINK_BACK) { |
1064 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1065 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1066 | bond->dev->name, new_active->dev->name, | |
1067 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1068 | } |
1069 | ||
1070 | new_active->delay = 0; | |
1071 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1072 | |
3d632c3f | 1073 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1074 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1075 | |
58402054 | 1076 | if (bond_is_lb(bond)) |
1da177e4 | 1077 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1078 | } else { |
1079 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1080 | pr_info("%s: making interface %s the new active one.\n", |
1081 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1082 | } |
1083 | } | |
1084 | } | |
1085 | ||
3d632c3f | 1086 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1087 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1088 | |
58402054 | 1089 | if (bond_is_lb(bond)) { |
1da177e4 | 1090 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1091 | if (old_active) |
1092 | bond_set_slave_inactive_flags(old_active); | |
1093 | if (new_active) | |
1094 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1095 | } else { |
1096 | bond->curr_active_slave = new_active; | |
1097 | } | |
c3ade5ca JV |
1098 | |
1099 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1100 | if (old_active) |
c3ade5ca | 1101 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1102 | |
1103 | if (new_active) { | |
ad246c99 BH |
1104 | bool should_notify_peers = false; |
1105 | ||
c3ade5ca | 1106 | bond_set_slave_active_flags(new_active); |
2ab82852 | 1107 | |
709f8a45 OG |
1108 | if (bond->params.fail_over_mac) |
1109 | bond_do_fail_over_mac(bond, new_active, | |
1110 | old_active); | |
3915c1e8 | 1111 | |
ad246c99 BH |
1112 | if (netif_running(bond->dev)) { |
1113 | bond->send_peer_notif = | |
1114 | bond->params.num_peer_notif; | |
1115 | should_notify_peers = | |
1116 | bond_should_notify_peers(bond); | |
1117 | } | |
1118 | ||
01f3109d OG |
1119 | write_unlock_bh(&bond->curr_slave_lock); |
1120 | read_unlock(&bond->lock); | |
1121 | ||
75c78500 | 1122 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
ad246c99 BH |
1123 | if (should_notify_peers) |
1124 | netdev_bonding_change(bond->dev, | |
1125 | NETDEV_NOTIFY_PEERS); | |
01f3109d OG |
1126 | |
1127 | read_lock(&bond->lock); | |
1128 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1129 | } |
c3ade5ca | 1130 | } |
a2fd940f | 1131 | |
5a37e8ca | 1132 | /* resend IGMP joins since active slave has changed or |
94265cf5 FL |
1133 | * all were sent on curr_active_slave. |
1134 | * resend only if bond is brought up with the affected | |
1135 | * bonding modes and the retransmission is enabled */ | |
1136 | if (netif_running(bond->dev) && (bond->params.resend_igmp > 0) && | |
1137 | ((USES_PRIMARY(bond->params.mode) && new_active) || | |
1138 | bond->params.mode == BOND_MODE_ROUNDROBIN)) { | |
c2952c31 | 1139 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1140 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1141 | } |
1da177e4 LT |
1142 | } |
1143 | ||
1144 | /** | |
1145 | * bond_select_active_slave - select a new active slave, if needed | |
1146 | * @bond: our bonding struct | |
1147 | * | |
3d632c3f | 1148 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1149 | * - The old curr_active_slave has been released or lost its link. |
1150 | * - The primary_slave has got its link back. | |
1151 | * - A slave has got its link back and there's no old curr_active_slave. | |
1152 | * | |
3915c1e8 | 1153 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1154 | */ |
a77b5325 | 1155 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1156 | { |
1157 | struct slave *best_slave; | |
ff59c456 | 1158 | int rv; |
1da177e4 LT |
1159 | |
1160 | best_slave = bond_find_best_slave(bond); | |
1161 | if (best_slave != bond->curr_active_slave) { | |
1162 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1163 | rv = bond_set_carrier(bond); |
1164 | if (!rv) | |
1165 | return; | |
1166 | ||
1167 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1168 | pr_info("%s: first active interface up!\n", |
1169 | bond->dev->name); | |
ff59c456 | 1170 | } else { |
a4aee5c8 JP |
1171 | pr_info("%s: now running without any active interface !\n", |
1172 | bond->dev->name); | |
ff59c456 | 1173 | } |
1da177e4 LT |
1174 | } |
1175 | } | |
1176 | ||
1177 | /*--------------------------- slave list handling ---------------------------*/ | |
1178 | ||
1179 | /* | |
1180 | * This function attaches the slave to the end of list. | |
1181 | * | |
1182 | * bond->lock held for writing by caller. | |
1183 | */ | |
1184 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1185 | { | |
1186 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1187 | new_slave->next = new_slave; | |
1188 | new_slave->prev = new_slave; | |
1189 | bond->first_slave = new_slave; | |
1190 | } else { | |
1191 | new_slave->next = bond->first_slave; | |
1192 | new_slave->prev = bond->first_slave->prev; | |
1193 | new_slave->next->prev = new_slave; | |
1194 | new_slave->prev->next = new_slave; | |
1195 | } | |
1196 | ||
1197 | bond->slave_cnt++; | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | * This function detaches the slave from the list. | |
1202 | * WARNING: no check is made to verify if the slave effectively | |
1203 | * belongs to <bond>. | |
1204 | * Nothing is freed on return, structures are just unchained. | |
1205 | * If any slave pointer in bond was pointing to <slave>, | |
1206 | * it should be changed by the calling function. | |
1207 | * | |
1208 | * bond->lock held for writing by caller. | |
1209 | */ | |
1210 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1211 | { | |
3d632c3f | 1212 | if (slave->next) |
1da177e4 | 1213 | slave->next->prev = slave->prev; |
1da177e4 | 1214 | |
3d632c3f | 1215 | if (slave->prev) |
1da177e4 | 1216 | slave->prev->next = slave->next; |
1da177e4 LT |
1217 | |
1218 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1219 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1220 | bond->first_slave = slave->next; | |
1221 | } else { | |
1222 | bond->first_slave = NULL; /* slave was the last one */ | |
1223 | } | |
1224 | } | |
1225 | ||
1226 | slave->next = NULL; | |
1227 | slave->prev = NULL; | |
1228 | bond->slave_cnt--; | |
1229 | } | |
1230 | ||
f6dc31a8 | 1231 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1232 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1233 | { |
8a8efa22 AW |
1234 | struct netpoll *np; |
1235 | int err = 0; | |
f6dc31a8 | 1236 | |
8a8efa22 AW |
1237 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1238 | err = -ENOMEM; | |
1239 | if (!np) | |
1240 | goto out; | |
1241 | ||
1242 | np->dev = slave->dev; | |
cefa9993 | 1243 | strlcpy(np->dev_name, slave->dev->name, IFNAMSIZ); |
8a8efa22 AW |
1244 | err = __netpoll_setup(np); |
1245 | if (err) { | |
1246 | kfree(np); | |
1247 | goto out; | |
f6dc31a8 | 1248 | } |
8a8efa22 AW |
1249 | slave->np = np; |
1250 | out: | |
1251 | return err; | |
1252 | } | |
1253 | static inline void slave_disable_netpoll(struct slave *slave) | |
1254 | { | |
1255 | struct netpoll *np = slave->np; | |
1256 | ||
1257 | if (!np) | |
1258 | return; | |
1259 | ||
1260 | slave->np = NULL; | |
1261 | synchronize_rcu_bh(); | |
1262 | __netpoll_cleanup(np); | |
1263 | kfree(np); | |
1264 | } | |
1265 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1266 | { | |
1267 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1268 | return false; | |
1269 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1270 | return false; | |
1271 | return true; | |
f6dc31a8 WC |
1272 | } |
1273 | ||
1274 | static void bond_poll_controller(struct net_device *bond_dev) | |
1275 | { | |
8a8efa22 AW |
1276 | } |
1277 | ||
1278 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1279 | { | |
c2355e1a NH |
1280 | struct slave *slave; |
1281 | int i; | |
1282 | ||
8a8efa22 AW |
1283 | bond_for_each_slave(bond, slave, i) |
1284 | if (IS_UP(slave->dev)) | |
1285 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1286 | } |
f6dc31a8 WC |
1287 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1288 | { | |
1289 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1290 | |
1291 | read_lock(&bond->lock); | |
1292 | __bond_netpoll_cleanup(bond); | |
1293 | read_unlock(&bond->lock); | |
1294 | } | |
1295 | ||
1296 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1297 | { | |
1298 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1299 | struct slave *slave; |
8a8efa22 | 1300 | int i, err = 0; |
f6dc31a8 WC |
1301 | |
1302 | read_lock(&bond->lock); | |
f6dc31a8 | 1303 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1304 | err = slave_enable_netpoll(slave); |
1305 | if (err) { | |
1306 | __bond_netpoll_cleanup(bond); | |
1307 | break; | |
f6dc31a8 WC |
1308 | } |
1309 | } | |
1310 | read_unlock(&bond->lock); | |
8a8efa22 | 1311 | return err; |
f6dc31a8 WC |
1312 | } |
1313 | ||
8a8efa22 AW |
1314 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1315 | { | |
1316 | return bond->dev->npinfo; | |
1317 | } | |
f6dc31a8 | 1318 | |
8a8efa22 AW |
1319 | #else |
1320 | static inline int slave_enable_netpoll(struct slave *slave) | |
1321 | { | |
1322 | return 0; | |
1323 | } | |
1324 | static inline void slave_disable_netpoll(struct slave *slave) | |
1325 | { | |
1326 | } | |
f6dc31a8 WC |
1327 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1328 | { | |
1329 | } | |
f6dc31a8 WC |
1330 | #endif |
1331 | ||
1da177e4 LT |
1332 | /*---------------------------------- IOCTL ----------------------------------*/ |
1333 | ||
4ad072c9 AB |
1334 | static int bond_sethwaddr(struct net_device *bond_dev, |
1335 | struct net_device *slave_dev) | |
1da177e4 | 1336 | { |
5a03cdb7 HE |
1337 | pr_debug("bond_dev=%p\n", bond_dev); |
1338 | pr_debug("slave_dev=%p\n", slave_dev); | |
1339 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1340 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1341 | return 0; | |
1342 | } | |
1343 | ||
c8f44aff MM |
1344 | static netdev_features_t bond_fix_features(struct net_device *dev, |
1345 | netdev_features_t features) | |
8531c5ff | 1346 | { |
8531c5ff | 1347 | struct slave *slave; |
b2a103e6 | 1348 | struct bonding *bond = netdev_priv(dev); |
c8f44aff | 1349 | netdev_features_t mask; |
8e3babcd | 1350 | int i; |
8531c5ff | 1351 | |
b2a103e6 | 1352 | read_lock(&bond->lock); |
b63365a2 | 1353 | |
b2a103e6 MM |
1354 | if (!bond->first_slave) { |
1355 | /* Disable adding VLANs to empty bond. But why? --mq */ | |
1356 | features |= NETIF_F_VLAN_CHALLENGED; | |
1357 | goto out; | |
1358 | } | |
b63365a2 | 1359 | |
b2a103e6 | 1360 | mask = features; |
b63365a2 | 1361 | features &= ~NETIF_F_ONE_FOR_ALL; |
b2a103e6 | 1362 | features |= NETIF_F_ALL_FOR_ALL; |
7f353bf2 | 1363 | |
54ef3137 | 1364 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1365 | features = netdev_increment_features(features, |
1366 | slave->dev->features, | |
b2a103e6 MM |
1367 | mask); |
1368 | } | |
1369 | ||
1370 | out: | |
1371 | read_unlock(&bond->lock); | |
1372 | return features; | |
1373 | } | |
1374 | ||
62f2a3a4 MM |
1375 | #define BOND_VLAN_FEATURES (NETIF_F_ALL_CSUM | NETIF_F_SG | \ |
1376 | NETIF_F_FRAGLIST | NETIF_F_ALL_TSO | \ | |
1377 | NETIF_F_HIGHDMA | NETIF_F_LRO) | |
b2a103e6 MM |
1378 | |
1379 | static void bond_compute_features(struct bonding *bond) | |
1380 | { | |
1381 | struct slave *slave; | |
1382 | struct net_device *bond_dev = bond->dev; | |
c8f44aff | 1383 | netdev_features_t vlan_features = BOND_VLAN_FEATURES; |
b2a103e6 MM |
1384 | unsigned short max_hard_header_len = ETH_HLEN; |
1385 | int i; | |
1386 | ||
1387 | read_lock(&bond->lock); | |
1388 | ||
1389 | if (!bond->first_slave) | |
1390 | goto done; | |
1391 | ||
1392 | bond_for_each_slave(bond, slave, i) { | |
278339a4 | 1393 | vlan_features = netdev_increment_features(vlan_features, |
b2a103e6 MM |
1394 | slave->dev->vlan_features, BOND_VLAN_FEATURES); |
1395 | ||
54ef3137 JV |
1396 | if (slave->dev->hard_header_len > max_hard_header_len) |
1397 | max_hard_header_len = slave->dev->hard_header_len; | |
1398 | } | |
8531c5ff | 1399 | |
b63365a2 | 1400 | done: |
b2a103e6 | 1401 | bond_dev->vlan_features = vlan_features; |
54ef3137 | 1402 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff | 1403 | |
b2a103e6 MM |
1404 | read_unlock(&bond->lock); |
1405 | ||
1406 | netdev_change_features(bond_dev); | |
8531c5ff AK |
1407 | } |
1408 | ||
872254dd MS |
1409 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1410 | struct net_device *slave_dev) | |
1411 | { | |
454d7c9b | 1412 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1413 | |
00829823 | 1414 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1415 | |
1416 | bond_dev->type = slave_dev->type; | |
1417 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1418 | bond_dev->addr_len = slave_dev->addr_len; | |
1419 | ||
1420 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1421 | slave_dev->addr_len); | |
d90a162a | 1422 | bond->setup_by_slave = 1; |
872254dd MS |
1423 | } |
1424 | ||
5b2c4dd2 | 1425 | /* On bonding slaves other than the currently active slave, suppress |
3aba891d | 1426 | * duplicates except for alb non-mcast/bcast. |
5b2c4dd2 JP |
1427 | */ |
1428 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
0bd80dad JP |
1429 | struct slave *slave, |
1430 | struct bonding *bond) | |
5b2c4dd2 | 1431 | { |
2d7011ca | 1432 | if (bond_is_slave_inactive(slave)) { |
0bd80dad | 1433 | if (bond->params.mode == BOND_MODE_ALB && |
5b2c4dd2 JP |
1434 | skb->pkt_type != PACKET_BROADCAST && |
1435 | skb->pkt_type != PACKET_MULTICAST) | |
5b2c4dd2 | 1436 | return false; |
5b2c4dd2 JP |
1437 | return true; |
1438 | } | |
1439 | return false; | |
1440 | } | |
1441 | ||
8a4eb573 | 1442 | static rx_handler_result_t bond_handle_frame(struct sk_buff **pskb) |
5b2c4dd2 | 1443 | { |
8a4eb573 | 1444 | struct sk_buff *skb = *pskb; |
f1c1775a | 1445 | struct slave *slave; |
0bd80dad | 1446 | struct bonding *bond; |
4d97480b MH |
1447 | void (*recv_probe)(struct sk_buff *, struct bonding *, |
1448 | struct slave *); | |
5b2c4dd2 | 1449 | |
8a4eb573 JP |
1450 | skb = skb_share_check(skb, GFP_ATOMIC); |
1451 | if (unlikely(!skb)) | |
1452 | return RX_HANDLER_CONSUMED; | |
1453 | ||
1454 | *pskb = skb; | |
5b2c4dd2 | 1455 | |
35d48903 JP |
1456 | slave = bond_slave_get_rcu(skb->dev); |
1457 | bond = slave->bond; | |
0bd80dad JP |
1458 | |
1459 | if (bond->params.arp_interval) | |
f1c1775a | 1460 | slave->dev->last_rx = jiffies; |
5b2c4dd2 | 1461 | |
4d97480b MH |
1462 | recv_probe = ACCESS_ONCE(bond->recv_probe); |
1463 | if (recv_probe) { | |
3aba891d JP |
1464 | struct sk_buff *nskb = skb_clone(skb, GFP_ATOMIC); |
1465 | ||
1466 | if (likely(nskb)) { | |
4d97480b | 1467 | recv_probe(nskb, bond, slave); |
3aba891d JP |
1468 | dev_kfree_skb(nskb); |
1469 | } | |
1470 | } | |
1471 | ||
0bd80dad | 1472 | if (bond_should_deliver_exact_match(skb, slave, bond)) { |
8a4eb573 | 1473 | return RX_HANDLER_EXACT; |
5b2c4dd2 JP |
1474 | } |
1475 | ||
35d48903 | 1476 | skb->dev = bond->dev; |
5b2c4dd2 | 1477 | |
0bd80dad | 1478 | if (bond->params.mode == BOND_MODE_ALB && |
35d48903 | 1479 | bond->dev->priv_flags & IFF_BRIDGE_PORT && |
5b2c4dd2 | 1480 | skb->pkt_type == PACKET_HOST) { |
5b2c4dd2 | 1481 | |
541ac7c9 CG |
1482 | if (unlikely(skb_cow_head(skb, |
1483 | skb->data - skb_mac_header(skb)))) { | |
1484 | kfree_skb(skb); | |
8a4eb573 | 1485 | return RX_HANDLER_CONSUMED; |
541ac7c9 | 1486 | } |
35d48903 | 1487 | memcpy(eth_hdr(skb)->h_dest, bond->dev->dev_addr, ETH_ALEN); |
5b2c4dd2 JP |
1488 | } |
1489 | ||
8a4eb573 | 1490 | return RX_HANDLER_ANOTHER; |
5b2c4dd2 JP |
1491 | } |
1492 | ||
1da177e4 | 1493 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1494 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1495 | { |
454d7c9b | 1496 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1497 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1498 | struct slave *new_slave = NULL; |
22bedad3 | 1499 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1500 | struct sockaddr addr; |
1501 | int link_reporting; | |
1da177e4 LT |
1502 | int res = 0; |
1503 | ||
552709d5 | 1504 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1505 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1506 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1507 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1508 | } |
1509 | ||
1da177e4 LT |
1510 | /* already enslaved */ |
1511 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1512 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1513 | return -EBUSY; |
1514 | } | |
1515 | ||
1516 | /* vlan challenged mutual exclusion */ | |
1517 | /* no need to lock since we're protected by rtnl_lock */ | |
1518 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1519 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
cc0e4070 | 1520 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
1521 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1522 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1523 | return -EPERM; |
1524 | } else { | |
a4aee5c8 JP |
1525 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1526 | bond_dev->name, slave_dev->name, | |
1527 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1528 | } |
1529 | } else { | |
5a03cdb7 | 1530 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1531 | } |
1532 | ||
217df670 JV |
1533 | /* |
1534 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1535 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1536 | * the current ifenslave will set the interface down prior to |
1537 | * enslaving it; the old ifenslave will not. | |
1538 | */ | |
1539 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1540 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1541 | slave_dev->name); |
1542 | res = -EPERM; | |
1543 | goto err_undo_flags; | |
1544 | } | |
1da177e4 | 1545 | |
872254dd MS |
1546 | /* set bonding device ether type by slave - bonding netdevices are |
1547 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1548 | * there is a need to override some of the type dependent attribs/funcs. | |
1549 | * | |
1550 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1551 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1552 | */ | |
1553 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1554 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1555 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1556 | bond_dev->name, |
1557 | bond_dev->type, slave_dev->type); | |
75c78500 | 1558 | |
3ca5b404 JP |
1559 | res = netdev_bonding_change(bond_dev, |
1560 | NETDEV_PRE_TYPE_CHANGE); | |
1561 | res = notifier_to_errno(res); | |
1562 | if (res) { | |
1563 | pr_err("%s: refused to change device type\n", | |
1564 | bond_dev->name); | |
1565 | res = -EBUSY; | |
1566 | goto err_undo_flags; | |
1567 | } | |
75c78500 | 1568 | |
32a806c1 | 1569 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1570 | dev_uc_flush(bond_dev); |
22bedad3 | 1571 | dev_mc_flush(bond_dev); |
32a806c1 | 1572 | |
e36b9d16 MS |
1573 | if (slave_dev->type != ARPHRD_ETHER) |
1574 | bond_setup_by_slave(bond_dev, slave_dev); | |
550fd08c | 1575 | else { |
e36b9d16 | 1576 | ether_setup(bond_dev); |
550fd08c NH |
1577 | bond_dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
1578 | } | |
75c78500 | 1579 | |
93d9b7d7 JP |
1580 | netdev_bonding_change(bond_dev, |
1581 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1582 | } |
872254dd | 1583 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1584 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1585 | slave_dev->name, | |
1586 | slave_dev->type, bond_dev->type); | |
1587 | res = -EINVAL; | |
1588 | goto err_undo_flags; | |
872254dd MS |
1589 | } |
1590 | ||
eb7cc59a | 1591 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1592 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1593 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1594 | bond_dev->name); | |
3915c1e8 JV |
1595 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1596 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1597 | 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", |
1598 | bond_dev->name); | |
2ab82852 MS |
1599 | res = -EOPNOTSUPP; |
1600 | goto err_undo_flags; | |
1601 | } | |
1da177e4 LT |
1602 | } |
1603 | ||
8d8fc29d AW |
1604 | call_netdevice_notifiers(NETDEV_JOIN, slave_dev); |
1605 | ||
c20811a7 JP |
1606 | /* If this is the first slave, then we need to set the master's hardware |
1607 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1608 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1609 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1610 | slave_dev->addr_len); | |
1611 | ||
1612 | ||
243cb4e5 | 1613 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1614 | if (!new_slave) { |
1615 | res = -ENOMEM; | |
1616 | goto err_undo_flags; | |
1617 | } | |
1618 | ||
bb1d9123 AG |
1619 | /* |
1620 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1621 | * is set via sysfs or module option if desired. | |
1622 | */ | |
1623 | new_slave->queue_id = 0; | |
1624 | ||
b15ba0fb JP |
1625 | /* Save slave's original mtu and then set it to match the bond */ |
1626 | new_slave->original_mtu = slave_dev->mtu; | |
1627 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1628 | if (res) { | |
1629 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1630 | goto err_free; | |
1631 | } | |
1632 | ||
217df670 JV |
1633 | /* |
1634 | * Save slave's original ("permanent") mac address for modes | |
1635 | * that need it, and for restoring it upon release, and then | |
1636 | * set it to the master's address | |
1637 | */ | |
1638 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1639 | |
dd957c57 | 1640 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1641 | /* |
1642 | * Set slave to master's mac address. The application already | |
1643 | * set the master's mac address to that of the first slave | |
1644 | */ | |
1645 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1646 | addr.sa_family = slave_dev->type; | |
1647 | res = dev_set_mac_address(slave_dev, &addr); | |
1648 | if (res) { | |
5a03cdb7 | 1649 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1650 | goto err_restore_mtu; |
2ab82852 | 1651 | } |
217df670 | 1652 | } |
1da177e4 | 1653 | |
1765a575 | 1654 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1655 | if (res) { |
1765a575 | 1656 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1657 | goto err_restore_mac; |
c2edacf8 | 1658 | } |
5b2c4dd2 | 1659 | |
217df670 JV |
1660 | /* open the slave since the application closed it */ |
1661 | res = dev_open(slave_dev); | |
1662 | if (res) { | |
3d632c3f | 1663 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
35d48903 | 1664 | goto err_unset_master; |
1da177e4 LT |
1665 | } |
1666 | ||
35d48903 | 1667 | new_slave->bond = bond; |
1da177e4 | 1668 | new_slave->dev = slave_dev; |
0b680e75 | 1669 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1670 | |
58402054 | 1671 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1672 | /* bond_alb_init_slave() must be called before all other stages since |
1673 | * it might fail and we do not want to have to undo everything | |
1674 | */ | |
1675 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1676 | if (res) |
569f0c4d | 1677 | goto err_close; |
1da177e4 LT |
1678 | } |
1679 | ||
1680 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1681 | * master's promisc (and mc) settings only if it becomes the | |
1682 | * curr_active_slave, and that is taken care of later when calling | |
1683 | * bond_change_active() | |
1684 | */ | |
1685 | if (!USES_PRIMARY(bond->params.mode)) { | |
1686 | /* set promiscuity level to new slave */ | |
1687 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1688 | res = dev_set_promiscuity(slave_dev, 1); |
1689 | if (res) | |
1690 | goto err_close; | |
1da177e4 LT |
1691 | } |
1692 | ||
1693 | /* set allmulti level to new slave */ | |
1694 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1695 | res = dev_set_allmulti(slave_dev, 1); |
1696 | if (res) | |
1697 | goto err_close; | |
1da177e4 LT |
1698 | } |
1699 | ||
b9e40857 | 1700 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1701 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1702 | netdev_for_each_mc_addr(ha, bond_dev) |
1703 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1704 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1705 | } |
1706 | ||
1707 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1708 | /* add lacpdu mc addr to mc list */ | |
1709 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1710 | ||
22bedad3 | 1711 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1712 | } |
1713 | ||
1714 | bond_add_vlans_on_slave(bond, slave_dev); | |
1715 | ||
1716 | write_lock_bh(&bond->lock); | |
1717 | ||
1718 | bond_attach_slave(bond, new_slave); | |
1719 | ||
1720 | new_slave->delay = 0; | |
1721 | new_slave->link_failure_count = 0; | |
1722 | ||
3915c1e8 JV |
1723 | write_unlock_bh(&bond->lock); |
1724 | ||
b2a103e6 MM |
1725 | bond_compute_features(bond); |
1726 | ||
3915c1e8 JV |
1727 | read_lock(&bond->lock); |
1728 | ||
f5b2b966 JV |
1729 | new_slave->last_arp_rx = jiffies; |
1730 | ||
1da177e4 LT |
1731 | if (bond->params.miimon && !bond->params.use_carrier) { |
1732 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1733 | ||
1734 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1735 | /* | |
1736 | * miimon is set but a bonded network driver | |
1737 | * does not support ETHTOOL/MII and | |
1738 | * arp_interval is not set. Note: if | |
1739 | * use_carrier is enabled, we will never go | |
1740 | * here (because netif_carrier is always | |
1741 | * supported); thus, we don't need to change | |
1742 | * the messages for netif_carrier. | |
1743 | */ | |
a4aee5c8 | 1744 | 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 | 1745 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1746 | } else if (link_reporting == -1) { |
1747 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1748 | 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", |
1749 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1750 | } |
1751 | } | |
1752 | ||
1753 | /* check for initial state */ | |
1754 | if (!bond->params.miimon || | |
1755 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1756 | if (bond->params.updelay) { | |
a4aee5c8 | 1757 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1758 | new_slave->link = BOND_LINK_BACK; |
1759 | new_slave->delay = bond->params.updelay; | |
1760 | } else { | |
a4aee5c8 | 1761 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1762 | new_slave->link = BOND_LINK_UP; |
1763 | } | |
1764 | new_slave->jiffies = jiffies; | |
1765 | } else { | |
a4aee5c8 | 1766 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1767 | new_slave->link = BOND_LINK_DOWN; |
1768 | } | |
1769 | ||
98f41f69 | 1770 | bond_update_speed_duplex(new_slave); |
1da177e4 LT |
1771 | |
1772 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1773 | /* if there is a primary slave, remember it */ | |
a549952a | 1774 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1775 | bond->primary_slave = new_slave; |
a549952a JP |
1776 | bond->force_primary = true; |
1777 | } | |
1da177e4 LT |
1778 | } |
1779 | ||
3915c1e8 JV |
1780 | write_lock_bh(&bond->curr_slave_lock); |
1781 | ||
1da177e4 LT |
1782 | switch (bond->params.mode) { |
1783 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1784 | bond_set_slave_inactive_flags(new_slave); |
1785 | bond_select_active_slave(bond); | |
1da177e4 LT |
1786 | break; |
1787 | case BOND_MODE_8023AD: | |
1788 | /* in 802.3ad mode, the internal mechanism | |
1789 | * will activate the slaves in the selected | |
1790 | * aggregator | |
1791 | */ | |
1792 | bond_set_slave_inactive_flags(new_slave); | |
1793 | /* if this is the first slave */ | |
1794 | if (bond->slave_cnt == 1) { | |
1795 | SLAVE_AD_INFO(new_slave).id = 1; | |
1796 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1797 | * can be called only after the mac address of the bond is set | |
1798 | */ | |
56d00c67 | 1799 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL); |
1da177e4 LT |
1800 | } else { |
1801 | SLAVE_AD_INFO(new_slave).id = | |
1802 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1803 | } | |
1804 | ||
1805 | bond_3ad_bind_slave(new_slave); | |
1806 | break; | |
1807 | case BOND_MODE_TLB: | |
1808 | case BOND_MODE_ALB: | |
e30bc066 | 1809 | bond_set_active_slave(new_slave); |
059fe7a5 | 1810 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1811 | bond_select_active_slave(bond); |
1da177e4 LT |
1812 | break; |
1813 | default: | |
5a03cdb7 | 1814 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1815 | |
1816 | /* always active in trunk mode */ | |
e30bc066 | 1817 | bond_set_active_slave(new_slave); |
1da177e4 LT |
1818 | |
1819 | /* In trunking mode there is little meaning to curr_active_slave | |
1820 | * anyway (it holds no special properties of the bond device), | |
1821 | * so we can change it without calling change_active_interface() | |
1822 | */ | |
3d632c3f | 1823 | if (!bond->curr_active_slave) |
1da177e4 | 1824 | bond->curr_active_slave = new_slave; |
3d632c3f | 1825 | |
1da177e4 LT |
1826 | break; |
1827 | } /* switch(bond_mode) */ | |
1828 | ||
3915c1e8 JV |
1829 | write_unlock_bh(&bond->curr_slave_lock); |
1830 | ||
ff59c456 JV |
1831 | bond_set_carrier(bond); |
1832 | ||
f6dc31a8 | 1833 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1834 | slave_dev->npinfo = bond_netpoll_info(bond); |
1835 | if (slave_dev->npinfo) { | |
1836 | if (slave_enable_netpoll(new_slave)) { | |
1837 | read_unlock(&bond->lock); | |
1838 | pr_info("Error, %s: master_dev is using netpoll, " | |
1839 | "but new slave device does not support netpoll.\n", | |
1840 | bond_dev->name); | |
1841 | res = -EBUSY; | |
f7d9821a | 1842 | goto err_detach; |
8a8efa22 | 1843 | } |
f6dc31a8 WC |
1844 | } |
1845 | #endif | |
8a8efa22 | 1846 | |
3915c1e8 | 1847 | read_unlock(&bond->lock); |
1da177e4 | 1848 | |
b76cdba9 MW |
1849 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1850 | if (res) | |
f7d9821a | 1851 | goto err_detach; |
b76cdba9 | 1852 | |
35d48903 JP |
1853 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, |
1854 | new_slave); | |
1855 | if (res) { | |
1856 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1857 | goto err_dest_symlinks; | |
1858 | } | |
1859 | ||
a4aee5c8 JP |
1860 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1861 | bond_dev->name, slave_dev->name, | |
e30bc066 | 1862 | bond_is_active_slave(new_slave) ? "n active" : " backup", |
a4aee5c8 | 1863 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); |
1da177e4 LT |
1864 | |
1865 | /* enslave is successful */ | |
1866 | return 0; | |
1867 | ||
1868 | /* Undo stages on error */ | |
35d48903 JP |
1869 | err_dest_symlinks: |
1870 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1871 | ||
f7d9821a | 1872 | err_detach: |
1873 | write_lock_bh(&bond->lock); | |
1874 | bond_detach_slave(bond, new_slave); | |
1875 | write_unlock_bh(&bond->lock); | |
1876 | ||
1da177e4 LT |
1877 | err_close: |
1878 | dev_close(slave_dev); | |
1879 | ||
569f0c4d | 1880 | err_unset_master: |
1765a575 | 1881 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1882 | |
1da177e4 | 1883 | err_restore_mac: |
dd957c57 | 1884 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1885 | /* XXX TODO - fom follow mode needs to change master's |
1886 | * MAC if this slave's MAC is in use by the bond, or at | |
1887 | * least print a warning. | |
1888 | */ | |
2ab82852 MS |
1889 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1890 | addr.sa_family = slave_dev->type; | |
1891 | dev_set_mac_address(slave_dev, &addr); | |
1892 | } | |
1da177e4 | 1893 | |
b15ba0fb JP |
1894 | err_restore_mtu: |
1895 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1896 | ||
1da177e4 LT |
1897 | err_free: |
1898 | kfree(new_slave); | |
1899 | ||
1900 | err_undo_flags: | |
b2a103e6 | 1901 | bond_compute_features(bond); |
3d632c3f | 1902 | |
1da177e4 LT |
1903 | return res; |
1904 | } | |
1905 | ||
1906 | /* | |
1907 | * Try to release the slave device <slave> from the bond device <master> | |
1908 | * It is legal to access curr_active_slave without a lock because all the function | |
1909 | * is write-locked. | |
1910 | * | |
1911 | * The rules for slave state should be: | |
1912 | * for Active/Backup: | |
1913 | * Active stays on all backups go down | |
1914 | * for Bonded connections: | |
1915 | * The first up interface should be left on and all others downed. | |
1916 | */ | |
a77b5325 | 1917 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1918 | { |
454d7c9b | 1919 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1920 | struct slave *slave, *oldcurrent; |
1921 | struct sockaddr addr; | |
c8f44aff | 1922 | netdev_features_t old_features = bond_dev->features; |
1da177e4 LT |
1923 | |
1924 | /* slave is not a slave or master is not master of this slave */ | |
1925 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1926 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1927 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1928 | bond_dev->name, slave_dev->name); |
1929 | return -EINVAL; | |
1930 | } | |
1931 | ||
e843fa50 | 1932 | block_netpoll_tx(); |
daf9209b | 1933 | netdev_bonding_change(bond_dev, NETDEV_RELEASE); |
1da177e4 LT |
1934 | write_lock_bh(&bond->lock); |
1935 | ||
1936 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1937 | if (!slave) { | |
1938 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1939 | pr_info("%s: %s not enslaved\n", |
1940 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1941 | write_unlock_bh(&bond->lock); |
e843fa50 | 1942 | unblock_netpoll_tx(); |
1da177e4 LT |
1943 | return -EINVAL; |
1944 | } | |
1945 | ||
35d48903 JP |
1946 | /* unregister rx_handler early so bond_handle_frame wouldn't be called |
1947 | * for this slave anymore. | |
1948 | */ | |
1949 | netdev_rx_handler_unregister(slave_dev); | |
1950 | write_unlock_bh(&bond->lock); | |
1951 | synchronize_net(); | |
1952 | write_lock_bh(&bond->lock); | |
1953 | ||
3915c1e8 | 1954 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1955 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1956 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1957 | 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", |
1958 | bond_dev->name, slave_dev->name, | |
1959 | slave->perm_hwaddr, | |
1960 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1961 | } |
1962 | ||
1963 | /* Inform AD package of unbinding of slave. */ | |
1964 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1965 | /* must be called before the slave is | |
1966 | * detached from the list | |
1967 | */ | |
1968 | bond_3ad_unbind_slave(slave); | |
1969 | } | |
1970 | ||
a4aee5c8 JP |
1971 | pr_info("%s: releasing %s interface %s\n", |
1972 | bond_dev->name, | |
e30bc066 | 1973 | bond_is_active_slave(slave) ? "active" : "backup", |
a4aee5c8 | 1974 | slave_dev->name); |
1da177e4 LT |
1975 | |
1976 | oldcurrent = bond->curr_active_slave; | |
1977 | ||
1978 | bond->current_arp_slave = NULL; | |
1979 | ||
1980 | /* release the slave from its bond */ | |
1981 | bond_detach_slave(bond, slave); | |
1982 | ||
3d632c3f | 1983 | if (bond->primary_slave == slave) |
1da177e4 | 1984 | bond->primary_slave = NULL; |
1da177e4 | 1985 | |
3d632c3f | 1986 | if (oldcurrent == slave) |
1da177e4 | 1987 | bond_change_active_slave(bond, NULL); |
1da177e4 | 1988 | |
58402054 | 1989 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1990 | /* Must be called only after the slave has been |
1991 | * detached from the list and the curr_active_slave | |
1992 | * has been cleared (if our_slave == old_current), | |
1993 | * but before a new active slave is selected. | |
1994 | */ | |
2543331d | 1995 | write_unlock_bh(&bond->lock); |
1da177e4 | 1996 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1997 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1998 | } |
1999 | ||
059fe7a5 JV |
2000 | if (oldcurrent == slave) { |
2001 | /* | |
2002 | * Note that we hold RTNL over this sequence, so there | |
2003 | * is no concern that another slave add/remove event | |
2004 | * will interfere. | |
2005 | */ | |
2006 | write_unlock_bh(&bond->lock); | |
2007 | read_lock(&bond->lock); | |
2008 | write_lock_bh(&bond->curr_slave_lock); | |
2009 | ||
1da177e4 LT |
2010 | bond_select_active_slave(bond); |
2011 | ||
059fe7a5 JV |
2012 | write_unlock_bh(&bond->curr_slave_lock); |
2013 | read_unlock(&bond->lock); | |
2014 | write_lock_bh(&bond->lock); | |
2015 | } | |
2016 | ||
1da177e4 | 2017 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
2018 | bond_set_carrier(bond); |
2019 | ||
1da177e4 LT |
2020 | /* if the last slave was removed, zero the mac address |
2021 | * of the master so it will be set by the application | |
2022 | * to the mac address of the first slave | |
2023 | */ | |
2024 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2025 | ||
cc0e4070 | 2026 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2027 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2028 | bond_dev->name, bond_dev->name); | |
2029 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2030 | bond_dev->name); | |
1da177e4 | 2031 | } |
1da177e4 LT |
2032 | } |
2033 | ||
2034 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2035 | unblock_netpoll_tx(); |
1da177e4 | 2036 | |
2af73d4b SP |
2037 | if (bond->slave_cnt == 0) |
2038 | call_netdevice_notifiers(NETDEV_CHANGEADDR, bond->dev); | |
2039 | ||
b2a103e6 MM |
2040 | bond_compute_features(bond); |
2041 | if (!(bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2042 | (old_features & NETIF_F_VLAN_CHALLENGED)) | |
2043 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", | |
2044 | bond_dev->name, slave_dev->name, bond_dev->name); | |
2045 | ||
b76cdba9 MW |
2046 | /* must do this from outside any spinlocks */ |
2047 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2048 | ||
1da177e4 LT |
2049 | bond_del_vlans_from_slave(bond, slave_dev); |
2050 | ||
2051 | /* If the mode USES_PRIMARY, then we should only remove its | |
2052 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2053 | * already taken care of above when we detached the slave | |
2054 | */ | |
2055 | if (!USES_PRIMARY(bond->params.mode)) { | |
2056 | /* unset promiscuity level from slave */ | |
3d632c3f | 2057 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2058 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2059 | |
2060 | /* unset allmulti level from slave */ | |
3d632c3f | 2061 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2062 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2063 | |
2064 | /* flush master's mc_list from slave */ | |
b9e40857 | 2065 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2066 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2067 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2068 | } |
2069 | ||
1765a575 | 2070 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2071 | |
8a8efa22 | 2072 | slave_disable_netpoll(slave); |
f6dc31a8 | 2073 | |
1da177e4 LT |
2074 | /* close slave before restoring its mac address */ |
2075 | dev_close(slave_dev); | |
2076 | ||
3915c1e8 | 2077 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2078 | /* restore original ("permanent") mac address */ |
2079 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2080 | addr.sa_family = slave_dev->type; | |
2081 | dev_set_mac_address(slave_dev, &addr); | |
2082 | } | |
1da177e4 | 2083 | |
b15ba0fb JP |
2084 | dev_set_mtu(slave_dev, slave->original_mtu); |
2085 | ||
2d7011ca | 2086 | slave_dev->priv_flags &= ~IFF_BONDING; |
1da177e4 LT |
2087 | |
2088 | kfree(slave); | |
2089 | ||
2090 | return 0; /* deletion OK */ | |
2091 | } | |
2092 | ||
d90a162a | 2093 | /* |
dadaa10b | 2094 | * First release a slave and then destroy the bond if no more slaves are left. |
d90a162a MS |
2095 | * Must be under rtnl_lock when this function is called. |
2096 | */ | |
26d8ee75 | 2097 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2098 | struct net_device *slave_dev) | |
d90a162a | 2099 | { |
454d7c9b | 2100 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2101 | int ret; |
2102 | ||
2103 | ret = bond_release(bond_dev, slave_dev); | |
2104 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2105 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2106 | pr_info("%s: destroying bond %s.\n", |
2107 | bond_dev->name, bond_dev->name); | |
9e71626c | 2108 | unregister_netdevice(bond_dev); |
d90a162a MS |
2109 | } |
2110 | return ret; | |
2111 | } | |
2112 | ||
1da177e4 LT |
2113 | /* |
2114 | * This function releases all slaves. | |
2115 | */ | |
2116 | static int bond_release_all(struct net_device *bond_dev) | |
2117 | { | |
454d7c9b | 2118 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2119 | struct slave *slave; |
2120 | struct net_device *slave_dev; | |
2121 | struct sockaddr addr; | |
2122 | ||
2123 | write_lock_bh(&bond->lock); | |
2124 | ||
ff59c456 JV |
2125 | netif_carrier_off(bond_dev); |
2126 | ||
3d632c3f | 2127 | if (bond->slave_cnt == 0) |
1da177e4 | 2128 | goto out; |
1da177e4 LT |
2129 | |
2130 | bond->current_arp_slave = NULL; | |
2131 | bond->primary_slave = NULL; | |
2132 | bond_change_active_slave(bond, NULL); | |
2133 | ||
2134 | while ((slave = bond->first_slave) != NULL) { | |
2135 | /* Inform AD package of unbinding of slave | |
2136 | * before slave is detached from the list. | |
2137 | */ | |
3d632c3f | 2138 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2139 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2140 | |
2141 | slave_dev = slave->dev; | |
2142 | bond_detach_slave(bond, slave); | |
2143 | ||
2543331d JV |
2144 | /* now that the slave is detached, unlock and perform |
2145 | * all the undo steps that should not be called from | |
2146 | * within a lock. | |
2147 | */ | |
2148 | write_unlock_bh(&bond->lock); | |
2149 | ||
35d48903 JP |
2150 | /* unregister rx_handler early so bond_handle_frame wouldn't |
2151 | * be called for this slave anymore. | |
2152 | */ | |
2153 | netdev_rx_handler_unregister(slave_dev); | |
2154 | synchronize_net(); | |
2155 | ||
58402054 | 2156 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2157 | /* must be called only after the slave |
2158 | * has been detached from the list | |
2159 | */ | |
2160 | bond_alb_deinit_slave(bond, slave); | |
2161 | } | |
2162 | ||
b76cdba9 | 2163 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2164 | bond_del_vlans_from_slave(bond, slave_dev); |
2165 | ||
2166 | /* If the mode USES_PRIMARY, then we should only remove its | |
2167 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2168 | * already taken care of above when we detached the slave | |
2169 | */ | |
2170 | if (!USES_PRIMARY(bond->params.mode)) { | |
2171 | /* unset promiscuity level from slave */ | |
3d632c3f | 2172 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2173 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2174 | |
2175 | /* unset allmulti level from slave */ | |
3d632c3f | 2176 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2177 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2178 | |
2179 | /* flush master's mc_list from slave */ | |
b9e40857 | 2180 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2181 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2182 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2183 | } |
2184 | ||
1765a575 | 2185 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2186 | |
8a8efa22 AW |
2187 | slave_disable_netpoll(slave); |
2188 | ||
1da177e4 LT |
2189 | /* close slave before restoring its mac address */ |
2190 | dev_close(slave_dev); | |
2191 | ||
dd957c57 | 2192 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2193 | /* restore original ("permanent") mac address*/ |
2194 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2195 | addr.sa_family = slave_dev->type; | |
2196 | dev_set_mac_address(slave_dev, &addr); | |
2197 | } | |
1da177e4 | 2198 | |
1da177e4 LT |
2199 | kfree(slave); |
2200 | ||
2201 | /* re-acquire the lock before getting the next slave */ | |
2202 | write_lock_bh(&bond->lock); | |
2203 | } | |
2204 | ||
2205 | /* zero the mac address of the master so it will be | |
2206 | * set by the application to the mac address of the | |
2207 | * first slave | |
2208 | */ | |
2209 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2210 | ||
cc0e4070 | 2211 | if (bond_vlan_used(bond)) { |
a4aee5c8 JP |
2212 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2213 | bond_dev->name, bond_dev->name); | |
2214 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2215 | bond_dev->name); | |
1da177e4 LT |
2216 | } |
2217 | ||
a4aee5c8 | 2218 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2219 | |
2220 | out: | |
2221 | write_unlock_bh(&bond->lock); | |
b2a103e6 MM |
2222 | |
2223 | bond_compute_features(bond); | |
2224 | ||
1da177e4 LT |
2225 | return 0; |
2226 | } | |
2227 | ||
2228 | /* | |
2229 | * This function changes the active slave to slave <slave_dev>. | |
2230 | * It returns -EINVAL in the following cases. | |
2231 | * - <slave_dev> is not found in the list. | |
2232 | * - There is not active slave now. | |
2233 | * - <slave_dev> is already active. | |
2234 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2235 | * - <slave_dev> is not running. | |
3d632c3f SH |
2236 | * In these cases, this function does nothing. |
2237 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2238 | */ |
2239 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2240 | { | |
454d7c9b | 2241 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2242 | struct slave *old_active = NULL; |
2243 | struct slave *new_active = NULL; | |
2244 | int res = 0; | |
2245 | ||
3d632c3f | 2246 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2247 | return -EINVAL; |
1da177e4 LT |
2248 | |
2249 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2250 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2251 | return -EINVAL; |
1da177e4 | 2252 | |
059fe7a5 | 2253 | read_lock(&bond->lock); |
1da177e4 | 2254 | |
059fe7a5 | 2255 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2256 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2257 | read_unlock(&bond->curr_slave_lock); |
2258 | ||
1da177e4 LT |
2259 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2260 | ||
2261 | /* | |
2262 | * Changing to the current active: do nothing; return success. | |
2263 | */ | |
2264 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2265 | read_unlock(&bond->lock); |
1da177e4 LT |
2266 | return 0; |
2267 | } | |
2268 | ||
2269 | if ((new_active) && | |
2270 | (old_active) && | |
2271 | (new_active->link == BOND_LINK_UP) && | |
2272 | IS_UP(new_active->dev)) { | |
e843fa50 | 2273 | block_netpoll_tx(); |
059fe7a5 | 2274 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2275 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2276 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2277 | unblock_netpoll_tx(); |
3d632c3f | 2278 | } else |
1da177e4 | 2279 | res = -EINVAL; |
1da177e4 | 2280 | |
059fe7a5 | 2281 | read_unlock(&bond->lock); |
1da177e4 LT |
2282 | |
2283 | return res; | |
2284 | } | |
2285 | ||
1da177e4 LT |
2286 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2287 | { | |
454d7c9b | 2288 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2289 | |
2290 | info->bond_mode = bond->params.mode; | |
2291 | info->miimon = bond->params.miimon; | |
2292 | ||
6603a6f2 | 2293 | read_lock(&bond->lock); |
1da177e4 | 2294 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2295 | read_unlock(&bond->lock); |
1da177e4 LT |
2296 | |
2297 | return 0; | |
2298 | } | |
2299 | ||
2300 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2301 | { | |
454d7c9b | 2302 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2303 | struct slave *slave; |
689c96cc | 2304 | int i, res = -ENODEV; |
1da177e4 | 2305 | |
6603a6f2 | 2306 | read_lock(&bond->lock); |
1da177e4 LT |
2307 | |
2308 | bond_for_each_slave(bond, slave, i) { | |
2309 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2310 | res = 0; |
2311 | strcpy(info->slave_name, slave->dev->name); | |
2312 | info->link = slave->link; | |
e30bc066 | 2313 | info->state = bond_slave_state(slave); |
689c96cc | 2314 | info->link_failure_count = slave->link_failure_count; |
1da177e4 LT |
2315 | break; |
2316 | } | |
2317 | } | |
2318 | ||
6603a6f2 | 2319 | read_unlock(&bond->lock); |
1da177e4 | 2320 | |
689c96cc | 2321 | return res; |
1da177e4 LT |
2322 | } |
2323 | ||
2324 | /*-------------------------------- Monitoring -------------------------------*/ | |
2325 | ||
1da177e4 | 2326 | |
f0c76d61 JV |
2327 | static int bond_miimon_inspect(struct bonding *bond) |
2328 | { | |
2329 | struct slave *slave; | |
2330 | int i, link_state, commit = 0; | |
41f89100 JP |
2331 | bool ignore_updelay; |
2332 | ||
2333 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2334 | |
2335 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2336 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2337 | |
f0c76d61 | 2338 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2339 | |
2340 | switch (slave->link) { | |
f0c76d61 JV |
2341 | case BOND_LINK_UP: |
2342 | if (link_state) | |
2343 | continue; | |
1da177e4 | 2344 | |
f0c76d61 JV |
2345 | slave->link = BOND_LINK_FAIL; |
2346 | slave->delay = bond->params.downdelay; | |
2347 | if (slave->delay) { | |
a4aee5c8 JP |
2348 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2349 | bond->dev->name, | |
2350 | (bond->params.mode == | |
2351 | BOND_MODE_ACTIVEBACKUP) ? | |
e30bc066 | 2352 | (bond_is_active_slave(slave) ? |
a4aee5c8 JP |
2353 | "active " : "backup ") : "", |
2354 | slave->dev->name, | |
2355 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2356 | } |
f0c76d61 JV |
2357 | /*FALLTHRU*/ |
2358 | case BOND_LINK_FAIL: | |
2359 | if (link_state) { | |
2360 | /* | |
2361 | * recovered before downdelay expired | |
2362 | */ | |
2363 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2364 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2365 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2366 | bond->dev->name, | |
2367 | (bond->params.downdelay - slave->delay) * | |
2368 | bond->params.miimon, | |
2369 | slave->dev->name); | |
f0c76d61 | 2370 | continue; |
1da177e4 | 2371 | } |
f0c76d61 JV |
2372 | |
2373 | if (slave->delay <= 0) { | |
2374 | slave->new_link = BOND_LINK_DOWN; | |
2375 | commit++; | |
2376 | continue; | |
1da177e4 | 2377 | } |
1da177e4 | 2378 | |
f0c76d61 JV |
2379 | slave->delay--; |
2380 | break; | |
2381 | ||
2382 | case BOND_LINK_DOWN: | |
2383 | if (!link_state) | |
2384 | continue; | |
2385 | ||
2386 | slave->link = BOND_LINK_BACK; | |
2387 | slave->delay = bond->params.updelay; | |
2388 | ||
2389 | if (slave->delay) { | |
a4aee5c8 JP |
2390 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2391 | bond->dev->name, slave->dev->name, | |
2392 | ignore_updelay ? 0 : | |
2393 | bond->params.updelay * | |
2394 | bond->params.miimon); | |
f0c76d61 JV |
2395 | } |
2396 | /*FALLTHRU*/ | |
2397 | case BOND_LINK_BACK: | |
2398 | if (!link_state) { | |
2399 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2400 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2401 | bond->dev->name, | |
2402 | (bond->params.updelay - slave->delay) * | |
2403 | bond->params.miimon, | |
2404 | slave->dev->name); | |
f0c76d61 JV |
2405 | |
2406 | continue; | |
2407 | } | |
2408 | ||
41f89100 JP |
2409 | if (ignore_updelay) |
2410 | slave->delay = 0; | |
2411 | ||
f0c76d61 JV |
2412 | if (slave->delay <= 0) { |
2413 | slave->new_link = BOND_LINK_UP; | |
2414 | commit++; | |
41f89100 | 2415 | ignore_updelay = false; |
f0c76d61 | 2416 | continue; |
1da177e4 | 2417 | } |
f0c76d61 JV |
2418 | |
2419 | slave->delay--; | |
1da177e4 | 2420 | break; |
f0c76d61 JV |
2421 | } |
2422 | } | |
1da177e4 | 2423 | |
f0c76d61 JV |
2424 | return commit; |
2425 | } | |
1da177e4 | 2426 | |
f0c76d61 JV |
2427 | static void bond_miimon_commit(struct bonding *bond) |
2428 | { | |
2429 | struct slave *slave; | |
2430 | int i; | |
2431 | ||
2432 | bond_for_each_slave(bond, slave, i) { | |
2433 | switch (slave->new_link) { | |
2434 | case BOND_LINK_NOCHANGE: | |
2435 | continue; | |
1da177e4 | 2436 | |
f0c76d61 JV |
2437 | case BOND_LINK_UP: |
2438 | slave->link = BOND_LINK_UP; | |
2439 | slave->jiffies = jiffies; | |
2440 | ||
2441 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2442 | /* prevent it from being the active one */ | |
e30bc066 | 2443 | bond_set_backup_slave(slave); |
f0c76d61 JV |
2444 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { |
2445 | /* make it immediately active */ | |
e30bc066 | 2446 | bond_set_active_slave(slave); |
f0c76d61 JV |
2447 | } else if (slave != bond->primary_slave) { |
2448 | /* prevent it from being the active one */ | |
e30bc066 | 2449 | bond_set_backup_slave(slave); |
1da177e4 | 2450 | } |
1da177e4 | 2451 | |
546add79 KPO |
2452 | bond_update_speed_duplex(slave); |
2453 | ||
5d30530e | 2454 | pr_info("%s: link status definitely up for interface %s, %u Mbps %s duplex.\n", |
700c2a77 KPO |
2455 | bond->dev->name, slave->dev->name, |
2456 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2457 | |
f0c76d61 JV |
2458 | /* notify ad that the link status has changed */ |
2459 | if (bond->params.mode == BOND_MODE_8023AD) | |
2460 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2461 | |
58402054 | 2462 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2463 | bond_alb_handle_link_change(bond, slave, |
2464 | BOND_LINK_UP); | |
1da177e4 | 2465 | |
f0c76d61 JV |
2466 | if (!bond->curr_active_slave || |
2467 | (slave == bond->primary_slave)) | |
2468 | goto do_failover; | |
1da177e4 | 2469 | |
f0c76d61 | 2470 | continue; |
059fe7a5 | 2471 | |
f0c76d61 | 2472 | case BOND_LINK_DOWN: |
fba4acda JV |
2473 | if (slave->link_failure_count < UINT_MAX) |
2474 | slave->link_failure_count++; | |
2475 | ||
f0c76d61 | 2476 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2477 | |
f0c76d61 JV |
2478 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2479 | bond->params.mode == BOND_MODE_8023AD) | |
2480 | bond_set_slave_inactive_flags(slave); | |
2481 | ||
a4aee5c8 JP |
2482 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2483 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2484 | |
2485 | if (bond->params.mode == BOND_MODE_8023AD) | |
2486 | bond_3ad_handle_link_change(slave, | |
2487 | BOND_LINK_DOWN); | |
2488 | ||
ae63e808 | 2489 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2490 | bond_alb_handle_link_change(bond, slave, |
2491 | BOND_LINK_DOWN); | |
2492 | ||
2493 | if (slave == bond->curr_active_slave) | |
2494 | goto do_failover; | |
2495 | ||
2496 | continue; | |
2497 | ||
2498 | default: | |
a4aee5c8 | 2499 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2500 | bond->dev->name, slave->new_link, |
2501 | slave->dev->name); | |
2502 | slave->new_link = BOND_LINK_NOCHANGE; | |
2503 | ||
2504 | continue; | |
2505 | } | |
2506 | ||
2507 | do_failover: | |
2508 | ASSERT_RTNL(); | |
e843fa50 | 2509 | block_netpoll_tx(); |
f0c76d61 JV |
2510 | write_lock_bh(&bond->curr_slave_lock); |
2511 | bond_select_active_slave(bond); | |
2512 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2513 | unblock_netpoll_tx(); |
f0c76d61 JV |
2514 | } |
2515 | ||
2516 | bond_set_carrier(bond); | |
1da177e4 LT |
2517 | } |
2518 | ||
0b0eef66 JV |
2519 | /* |
2520 | * bond_mii_monitor | |
2521 | * | |
2522 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2523 | * inspection, then (if inspection indicates something needs to be done) |
2524 | * an acquisition of appropriate locks followed by a commit phase to | |
2525 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2526 | */ |
2527 | void bond_mii_monitor(struct work_struct *work) | |
2528 | { | |
2529 | struct bonding *bond = container_of(work, struct bonding, | |
2530 | mii_work.work); | |
ad246c99 | 2531 | bool should_notify_peers = false; |
e6d265e8 | 2532 | unsigned long delay; |
0b0eef66 JV |
2533 | |
2534 | read_lock(&bond->lock); | |
e6d265e8 JV |
2535 | |
2536 | delay = msecs_to_jiffies(bond->params.miimon); | |
f0c76d61 JV |
2537 | |
2538 | if (bond->slave_cnt == 0) | |
2539 | goto re_arm; | |
b59f9f74 | 2540 | |
ad246c99 BH |
2541 | should_notify_peers = bond_should_notify_peers(bond); |
2542 | ||
f0c76d61 | 2543 | if (bond_miimon_inspect(bond)) { |
0b0eef66 | 2544 | read_unlock(&bond->lock); |
e6d265e8 JV |
2545 | |
2546 | /* Race avoidance with bond_close cancel of workqueue */ | |
2547 | if (!rtnl_trylock()) { | |
2548 | read_lock(&bond->lock); | |
2549 | delay = 1; | |
2550 | should_notify_peers = false; | |
2551 | goto re_arm; | |
2552 | } | |
2553 | ||
0b0eef66 | 2554 | read_lock(&bond->lock); |
f0c76d61 JV |
2555 | |
2556 | bond_miimon_commit(bond); | |
2557 | ||
5655662d JV |
2558 | read_unlock(&bond->lock); |
2559 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2560 | read_lock(&bond->lock); | |
0b0eef66 JV |
2561 | } |
2562 | ||
f0c76d61 | 2563 | re_arm: |
e6d265e8 JV |
2564 | if (bond->params.miimon) |
2565 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2566 | ||
0b0eef66 | 2567 | read_unlock(&bond->lock); |
ad246c99 BH |
2568 | |
2569 | if (should_notify_peers) { | |
e6d265e8 JV |
2570 | if (!rtnl_trylock()) { |
2571 | read_lock(&bond->lock); | |
2572 | bond->send_peer_notif++; | |
2573 | read_unlock(&bond->lock); | |
2574 | return; | |
2575 | } | |
ad246c99 BH |
2576 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
2577 | rtnl_unlock(); | |
2578 | } | |
0b0eef66 | 2579 | } |
c3ade5ca | 2580 | |
d3bb52b0 | 2581 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2582 | { |
0883beca | 2583 | struct vlan_entry *vlan; |
eaddcd76 | 2584 | struct net_device *vlan_dev; |
f5b2b966 | 2585 | |
eaddcd76 | 2586 | if (ip == bond_confirm_addr(bond->dev, 0, ip)) |
f5b2b966 JV |
2587 | return 1; |
2588 | ||
0883beca | 2589 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
eaddcd76 AG |
2590 | rcu_read_lock(); |
2591 | vlan_dev = __vlan_find_dev_deep(bond->dev, vlan->vlan_id); | |
2592 | rcu_read_unlock(); | |
2593 | if (vlan_dev && ip == bond_confirm_addr(vlan_dev, 0, ip)) | |
f5b2b966 JV |
2594 | return 1; |
2595 | } | |
2596 | ||
2597 | return 0; | |
2598 | } | |
2599 | ||
c3ade5ca JV |
2600 | /* |
2601 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2602 | * switches in VLAN mode (especially if ports are configured as | |
2603 | * "native" to a VLAN) might not pass non-tagged frames. | |
2604 | */ | |
d3bb52b0 | 2605 | 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 |
2606 | { |
2607 | struct sk_buff *skb; | |
2608 | ||
5a03cdb7 | 2609 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2610 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2611 | |
c3ade5ca JV |
2612 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2613 | NULL, slave_dev->dev_addr, NULL); | |
2614 | ||
2615 | if (!skb) { | |
a4aee5c8 | 2616 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2617 | return; |
2618 | } | |
2619 | if (vlan_id) { | |
2620 | skb = vlan_put_tag(skb, vlan_id); | |
2621 | if (!skb) { | |
a4aee5c8 | 2622 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2623 | return; |
2624 | } | |
2625 | } | |
2626 | arp_xmit(skb); | |
2627 | } | |
2628 | ||
2629 | ||
1da177e4 LT |
2630 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2631 | { | |
b23dd4fe | 2632 | int i, vlan_id; |
d3bb52b0 | 2633 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2634 | struct vlan_entry *vlan; |
eaddcd76 | 2635 | struct net_device *vlan_dev = NULL; |
c3ade5ca | 2636 | struct rtable *rt; |
1da177e4 | 2637 | |
6b780567 | 2638 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
eaddcd76 | 2639 | __be32 addr; |
6b780567 | 2640 | if (!targets[i]) |
5a31bec0 | 2641 | break; |
5a03cdb7 | 2642 | pr_debug("basa: target %x\n", targets[i]); |
cc0e4070 | 2643 | if (!bond_vlan_used(bond)) { |
5a03cdb7 | 2644 | pr_debug("basa: empty vlan: arp_send\n"); |
eaddcd76 | 2645 | addr = bond_confirm_addr(bond->dev, targets[i], 0); |
c3ade5ca | 2646 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2647 | addr, 0); |
c3ade5ca JV |
2648 | continue; |
2649 | } | |
2650 | ||
2651 | /* | |
2652 | * If VLANs are configured, we do a route lookup to | |
2653 | * determine which VLAN interface would be used, so we | |
2654 | * can tag the ARP with the proper VLAN tag. | |
2655 | */ | |
78fbfd8a DM |
2656 | rt = ip_route_output(dev_net(bond->dev), targets[i], 0, |
2657 | RTO_ONLINK, 0); | |
b23dd4fe | 2658 | if (IS_ERR(rt)) { |
c3ade5ca | 2659 | if (net_ratelimit()) { |
a4aee5c8 | 2660 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
78fbfd8a | 2661 | bond->dev->name, &targets[i]); |
c3ade5ca JV |
2662 | } |
2663 | continue; | |
2664 | } | |
2665 | ||
2666 | /* | |
2667 | * This target is not on a VLAN | |
2668 | */ | |
d8d1f30b | 2669 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2670 | ip_rt_put(rt); |
5a03cdb7 | 2671 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
eaddcd76 | 2672 | addr = bond_confirm_addr(bond->dev, targets[i], 0); |
c3ade5ca | 2673 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2674 | addr, 0); |
c3ade5ca JV |
2675 | continue; |
2676 | } | |
2677 | ||
2678 | vlan_id = 0; | |
0883beca | 2679 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
cc0e4070 JP |
2680 | rcu_read_lock(); |
2681 | vlan_dev = __vlan_find_dev_deep(bond->dev, | |
2682 | vlan->vlan_id); | |
2683 | rcu_read_unlock(); | |
d8d1f30b | 2684 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2685 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2686 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2687 | vlan_dev->name, vlan_id); |
2688 | break; | |
2689 | } | |
2690 | } | |
2691 | ||
eaddcd76 | 2692 | if (vlan_id && vlan_dev) { |
ed4b9f80 | 2693 | ip_rt_put(rt); |
eaddcd76 | 2694 | addr = bond_confirm_addr(vlan_dev, targets[i], 0); |
c3ade5ca | 2695 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
eaddcd76 | 2696 | addr, vlan_id); |
c3ade5ca JV |
2697 | continue; |
2698 | } | |
2699 | ||
2700 | if (net_ratelimit()) { | |
a4aee5c8 | 2701 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
78fbfd8a | 2702 | bond->dev->name, &targets[i], |
d8d1f30b | 2703 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2704 | } |
ed4b9f80 | 2705 | ip_rt_put(rt); |
c3ade5ca JV |
2706 | } |
2707 | } | |
2708 | ||
d3bb52b0 | 2709 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2710 | { |
2711 | int i; | |
d3bb52b0 | 2712 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2713 | |
f5b2b966 | 2714 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2715 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2716 | &sip, &tip, i, &targets[i], |
2717 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2718 | if (sip == targets[i]) { |
2719 | if (bond_has_this_ip(bond, tip)) | |
2720 | slave->last_arp_rx = jiffies; | |
2721 | return; | |
2722 | } | |
2723 | } | |
2724 | } | |
2725 | ||
3aba891d JP |
2726 | static void bond_arp_rcv(struct sk_buff *skb, struct bonding *bond, |
2727 | struct slave *slave) | |
f5b2b966 JV |
2728 | { |
2729 | struct arphdr *arp; | |
f5b2b966 | 2730 | unsigned char *arp_ptr; |
d3bb52b0 | 2731 | __be32 sip, tip; |
f5b2b966 | 2732 | |
3aba891d JP |
2733 | if (skb->protocol != __cpu_to_be16(ETH_P_ARP)) |
2734 | return; | |
f5b2b966 | 2735 | |
f5b2b966 JV |
2736 | read_lock(&bond->lock); |
2737 | ||
3aba891d JP |
2738 | pr_debug("bond_arp_rcv: bond %s skb->dev %s\n", |
2739 | bond->dev->name, skb->dev->name); | |
f5b2b966 | 2740 | |
3aba891d | 2741 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
f5b2b966 JV |
2742 | goto out_unlock; |
2743 | ||
d0a92be0 | 2744 | arp = arp_hdr(skb); |
3aba891d | 2745 | if (arp->ar_hln != bond->dev->addr_len || |
f5b2b966 JV |
2746 | skb->pkt_type == PACKET_OTHERHOST || |
2747 | skb->pkt_type == PACKET_LOOPBACK || | |
2748 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2749 | arp->ar_pro != htons(ETH_P_IP) || | |
2750 | arp->ar_pln != 4) | |
2751 | goto out_unlock; | |
2752 | ||
2753 | arp_ptr = (unsigned char *)(arp + 1); | |
3aba891d | 2754 | arp_ptr += bond->dev->addr_len; |
f5b2b966 | 2755 | memcpy(&sip, arp_ptr, 4); |
3aba891d | 2756 | arp_ptr += 4 + bond->dev->addr_len; |
f5b2b966 JV |
2757 | memcpy(&tip, arp_ptr, 4); |
2758 | ||
5a03cdb7 | 2759 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
e30bc066 | 2760 | bond->dev->name, slave->dev->name, bond_slave_state(slave), |
a4aee5c8 JP |
2761 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), |
2762 | &sip, &tip); | |
f5b2b966 JV |
2763 | |
2764 | /* | |
2765 | * Backup slaves won't see the ARP reply, but do come through | |
2766 | * here for each ARP probe (so we swap the sip/tip to validate | |
2767 | * the probe). In a "redundant switch, common router" type of | |
2768 | * configuration, the ARP probe will (hopefully) travel from | |
2769 | * the active, through one switch, the router, then the other | |
2770 | * switch before reaching the backup. | |
2771 | */ | |
e30bc066 | 2772 | if (bond_is_active_slave(slave)) |
f5b2b966 JV |
2773 | bond_validate_arp(bond, slave, sip, tip); |
2774 | else | |
2775 | bond_validate_arp(bond, slave, tip, sip); | |
2776 | ||
2777 | out_unlock: | |
2778 | read_unlock(&bond->lock); | |
f5b2b966 JV |
2779 | } |
2780 | ||
1da177e4 LT |
2781 | /* |
2782 | * this function is called regularly to monitor each slave's link | |
2783 | * ensuring that traffic is being sent and received when arp monitoring | |
2784 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2785 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2786 | * arp monitoring in active backup mode. | |
2787 | */ | |
1b76b316 | 2788 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2789 | { |
1b76b316 JV |
2790 | struct bonding *bond = container_of(work, struct bonding, |
2791 | arp_work.work); | |
1da177e4 LT |
2792 | struct slave *slave, *oldcurrent; |
2793 | int do_failover = 0; | |
2794 | int delta_in_ticks; | |
2795 | int i; | |
2796 | ||
2797 | read_lock(&bond->lock); | |
2798 | ||
5ce0da8f | 2799 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2800 | |
3d632c3f | 2801 | if (bond->slave_cnt == 0) |
1da177e4 | 2802 | goto re_arm; |
1da177e4 LT |
2803 | |
2804 | read_lock(&bond->curr_slave_lock); | |
2805 | oldcurrent = bond->curr_active_slave; | |
2806 | read_unlock(&bond->curr_slave_lock); | |
2807 | ||
2808 | /* see if any of the previous devices are up now (i.e. they have | |
2809 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2810 | * the picture unless it is null. also, slave->jiffies is not needed | |
2811 | * here because we send an arp on each slave and give a slave as | |
2812 | * long as it needs to get the tx/rx within the delta. | |
2813 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2814 | * so it can wait | |
2815 | */ | |
2816 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2817 | unsigned long trans_start = dev_trans_start(slave->dev); |
2818 | ||
1da177e4 | 2819 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2820 | if (time_in_range(jiffies, |
2821 | trans_start - delta_in_ticks, | |
2822 | trans_start + delta_in_ticks) && | |
2823 | time_in_range(jiffies, | |
2824 | slave->dev->last_rx - delta_in_ticks, | |
2825 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2826 | |
2827 | slave->link = BOND_LINK_UP; | |
e30bc066 | 2828 | bond_set_active_slave(slave); |
1da177e4 LT |
2829 | |
2830 | /* primary_slave has no meaning in round-robin | |
2831 | * mode. the window of a slave being up and | |
2832 | * curr_active_slave being null after enslaving | |
2833 | * is closed. | |
2834 | */ | |
2835 | if (!oldcurrent) { | |
a4aee5c8 JP |
2836 | pr_info("%s: link status definitely up for interface %s, ", |
2837 | bond->dev->name, | |
2838 | slave->dev->name); | |
1da177e4 LT |
2839 | do_failover = 1; |
2840 | } else { | |
a4aee5c8 JP |
2841 | pr_info("%s: interface %s is now up\n", |
2842 | bond->dev->name, | |
2843 | slave->dev->name); | |
1da177e4 LT |
2844 | } |
2845 | } | |
2846 | } else { | |
2847 | /* slave->link == BOND_LINK_UP */ | |
2848 | ||
2849 | /* not all switches will respond to an arp request | |
2850 | * when the source ip is 0, so don't take the link down | |
2851 | * if we don't know our ip yet | |
2852 | */ | |
cb32f2a0 JB |
2853 | if (!time_in_range(jiffies, |
2854 | trans_start - delta_in_ticks, | |
2855 | trans_start + 2 * delta_in_ticks) || | |
2856 | !time_in_range(jiffies, | |
2857 | slave->dev->last_rx - delta_in_ticks, | |
2858 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2859 | |
2860 | slave->link = BOND_LINK_DOWN; | |
e30bc066 | 2861 | bond_set_backup_slave(slave); |
1da177e4 | 2862 | |
3d632c3f | 2863 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2864 | slave->link_failure_count++; |
1da177e4 | 2865 | |
a4aee5c8 JP |
2866 | pr_info("%s: interface %s is now down.\n", |
2867 | bond->dev->name, | |
2868 | slave->dev->name); | |
1da177e4 | 2869 | |
3d632c3f | 2870 | if (slave == oldcurrent) |
1da177e4 | 2871 | do_failover = 1; |
1da177e4 LT |
2872 | } |
2873 | } | |
2874 | ||
2875 | /* note: if switch is in round-robin mode, all links | |
2876 | * must tx arp to ensure all links rx an arp - otherwise | |
2877 | * links may oscillate or not come up at all; if switch is | |
2878 | * in something like xor mode, there is nothing we can | |
2879 | * do - all replies will be rx'ed on same link causing slaves | |
2880 | * to be unstable during low/no traffic periods | |
2881 | */ | |
3d632c3f | 2882 | if (IS_UP(slave->dev)) |
1da177e4 | 2883 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2884 | } |
2885 | ||
2886 | if (do_failover) { | |
e843fa50 | 2887 | block_netpoll_tx(); |
059fe7a5 | 2888 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2889 | |
2890 | bond_select_active_slave(bond); | |
2891 | ||
059fe7a5 | 2892 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2893 | unblock_netpoll_tx(); |
1da177e4 LT |
2894 | } |
2895 | ||
2896 | re_arm: | |
e6d265e8 | 2897 | if (bond->params.arp_interval) |
1b76b316 | 2898 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 2899 | |
1da177e4 LT |
2900 | read_unlock(&bond->lock); |
2901 | } | |
2902 | ||
2903 | /* | |
b2220cad JV |
2904 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2905 | * changes. Sets new_link in slaves to specify what action should take | |
2906 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2907 | * to link states must be committed. | |
2908 | * | |
2909 | * Called with bond->lock held for read. | |
1da177e4 | 2910 | */ |
b2220cad | 2911 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2912 | { |
1da177e4 | 2913 | struct slave *slave; |
b2220cad | 2914 | int i, commit = 0; |
cb32f2a0 | 2915 | unsigned long trans_start; |
1da177e4 | 2916 | |
b2220cad JV |
2917 | bond_for_each_slave(bond, slave, i) { |
2918 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2919 | |
b2220cad | 2920 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2921 | if (time_in_range(jiffies, |
2922 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2923 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
2924 | ||
b2220cad JV |
2925 | slave->new_link = BOND_LINK_UP; |
2926 | commit++; | |
2927 | } | |
1da177e4 | 2928 | |
b2220cad JV |
2929 | continue; |
2930 | } | |
1da177e4 | 2931 | |
b2220cad JV |
2932 | /* |
2933 | * Give slaves 2*delta after being enslaved or made | |
2934 | * active. This avoids bouncing, as the last receive | |
2935 | * times need a full ARP monitor cycle to be updated. | |
2936 | */ | |
cb32f2a0 JB |
2937 | if (time_in_range(jiffies, |
2938 | slave->jiffies - delta_in_ticks, | |
2939 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
2940 | continue; |
2941 | ||
2942 | /* | |
2943 | * Backup slave is down if: | |
2944 | * - No current_arp_slave AND | |
2945 | * - more than 3*delta since last receive AND | |
2946 | * - the bond has an IP address | |
2947 | * | |
2948 | * Note: a non-null current_arp_slave indicates | |
2949 | * the curr_active_slave went down and we are | |
2950 | * searching for a new one; under this condition | |
2951 | * we only take the curr_active_slave down - this | |
2952 | * gives each slave a chance to tx/rx traffic | |
2953 | * before being taken out | |
2954 | */ | |
e30bc066 | 2955 | if (!bond_is_active_slave(slave) && |
b2220cad | 2956 | !bond->current_arp_slave && |
cb32f2a0 JB |
2957 | !time_in_range(jiffies, |
2958 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2959 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
2960 | ||
b2220cad JV |
2961 | slave->new_link = BOND_LINK_DOWN; |
2962 | commit++; | |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | * Active slave is down if: | |
2967 | * - more than 2*delta since transmitting OR | |
2968 | * - (more than 2*delta since receive AND | |
2969 | * the bond has an IP address) | |
2970 | */ | |
cb32f2a0 | 2971 | trans_start = dev_trans_start(slave->dev); |
e30bc066 | 2972 | if (bond_is_active_slave(slave) && |
cb32f2a0 JB |
2973 | (!time_in_range(jiffies, |
2974 | trans_start - delta_in_ticks, | |
2975 | trans_start + 2 * delta_in_ticks) || | |
2976 | !time_in_range(jiffies, | |
2977 | slave_last_rx(bond, slave) - delta_in_ticks, | |
2978 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
2979 | ||
b2220cad JV |
2980 | slave->new_link = BOND_LINK_DOWN; |
2981 | commit++; | |
2982 | } | |
1da177e4 LT |
2983 | } |
2984 | ||
b2220cad JV |
2985 | return commit; |
2986 | } | |
1da177e4 | 2987 | |
b2220cad JV |
2988 | /* |
2989 | * Called to commit link state changes noted by inspection step of | |
2990 | * active-backup mode ARP monitor. | |
2991 | * | |
2992 | * Called with RTNL and bond->lock for read. | |
2993 | */ | |
2994 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2995 | { | |
2996 | struct slave *slave; | |
2997 | int i; | |
cb32f2a0 | 2998 | unsigned long trans_start; |
1da177e4 | 2999 | |
b2220cad JV |
3000 | bond_for_each_slave(bond, slave, i) { |
3001 | switch (slave->new_link) { | |
3002 | case BOND_LINK_NOCHANGE: | |
3003 | continue; | |
ff59c456 | 3004 | |
b2220cad | 3005 | case BOND_LINK_UP: |
cb32f2a0 | 3006 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 3007 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
3008 | time_in_range(jiffies, |
3009 | trans_start - delta_in_ticks, | |
3010 | trans_start + delta_in_ticks)) || | |
b9f60253 | 3011 | bond->curr_active_slave != slave) { |
b2220cad | 3012 | slave->link = BOND_LINK_UP; |
5a430974 VF |
3013 | if (bond->current_arp_slave) { |
3014 | bond_set_slave_inactive_flags( | |
3015 | bond->current_arp_slave); | |
3016 | bond->current_arp_slave = NULL; | |
3017 | } | |
b2220cad | 3018 | |
a4aee5c8 | 3019 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3020 | bond->dev->name, slave->dev->name); |
b2220cad | 3021 | |
b9f60253 JP |
3022 | if (!bond->curr_active_slave || |
3023 | (slave == bond->primary_slave)) | |
3024 | goto do_failover; | |
1da177e4 | 3025 | |
b9f60253 | 3026 | } |
1da177e4 | 3027 | |
b9f60253 | 3028 | continue; |
1da177e4 | 3029 | |
b2220cad JV |
3030 | case BOND_LINK_DOWN: |
3031 | if (slave->link_failure_count < UINT_MAX) | |
3032 | slave->link_failure_count++; | |
3033 | ||
3034 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3035 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3036 | |
a4aee5c8 | 3037 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3038 | bond->dev->name, slave->dev->name); |
b2220cad | 3039 | |
b9f60253 | 3040 | if (slave == bond->curr_active_slave) { |
b2220cad | 3041 | bond->current_arp_slave = NULL; |
b9f60253 | 3042 | goto do_failover; |
1da177e4 | 3043 | } |
b9f60253 JP |
3044 | |
3045 | continue; | |
b2220cad JV |
3046 | |
3047 | default: | |
a4aee5c8 | 3048 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3049 | bond->dev->name, slave->new_link, |
3050 | slave->dev->name); | |
b9f60253 | 3051 | continue; |
1da177e4 | 3052 | } |
1da177e4 | 3053 | |
b9f60253 JP |
3054 | do_failover: |
3055 | ASSERT_RTNL(); | |
e843fa50 | 3056 | block_netpoll_tx(); |
b2220cad | 3057 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3058 | bond_select_active_slave(bond); |
b2220cad | 3059 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3060 | unblock_netpoll_tx(); |
b2220cad | 3061 | } |
1da177e4 | 3062 | |
b2220cad JV |
3063 | bond_set_carrier(bond); |
3064 | } | |
1da177e4 | 3065 | |
b2220cad JV |
3066 | /* |
3067 | * Send ARP probes for active-backup mode ARP monitor. | |
3068 | * | |
3069 | * Called with bond->lock held for read. | |
3070 | */ | |
3071 | static void bond_ab_arp_probe(struct bonding *bond) | |
3072 | { | |
3073 | struct slave *slave; | |
3074 | int i; | |
1da177e4 | 3075 | |
b2220cad | 3076 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3077 | |
b2220cad | 3078 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3079 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3080 | bond->current_arp_slave->dev->name, | |
3081 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3082 | |
b2220cad JV |
3083 | if (bond->curr_active_slave) { |
3084 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3085 | read_unlock(&bond->curr_slave_lock); | |
3086 | return; | |
3087 | } | |
1da177e4 | 3088 | |
b2220cad | 3089 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3090 | |
b2220cad JV |
3091 | /* if we don't have a curr_active_slave, search for the next available |
3092 | * backup slave from the current_arp_slave and make it the candidate | |
3093 | * for becoming the curr_active_slave | |
3094 | */ | |
1da177e4 | 3095 | |
b2220cad JV |
3096 | if (!bond->current_arp_slave) { |
3097 | bond->current_arp_slave = bond->first_slave; | |
3098 | if (!bond->current_arp_slave) | |
3099 | return; | |
3100 | } | |
1da177e4 | 3101 | |
b2220cad | 3102 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3103 | |
b2220cad JV |
3104 | /* search for next candidate */ |
3105 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3106 | if (IS_UP(slave->dev)) { | |
3107 | slave->link = BOND_LINK_BACK; | |
3108 | bond_set_slave_active_flags(slave); | |
3109 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3110 | slave->jiffies = jiffies; |
b2220cad JV |
3111 | bond->current_arp_slave = slave; |
3112 | break; | |
1da177e4 LT |
3113 | } |
3114 | ||
b2220cad JV |
3115 | /* if the link state is up at this point, we |
3116 | * mark it down - this can happen if we have | |
3117 | * simultaneous link failures and | |
3118 | * reselect_active_interface doesn't make this | |
3119 | * one the current slave so it is still marked | |
3120 | * up when it is actually down | |
1da177e4 | 3121 | */ |
b2220cad JV |
3122 | if (slave->link == BOND_LINK_UP) { |
3123 | slave->link = BOND_LINK_DOWN; | |
3124 | if (slave->link_failure_count < UINT_MAX) | |
3125 | slave->link_failure_count++; | |
1da177e4 | 3126 | |
b2220cad JV |
3127 | bond_set_slave_inactive_flags(slave); |
3128 | ||
a4aee5c8 JP |
3129 | pr_info("%s: backup interface %s is now down.\n", |
3130 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3131 | } |
b2220cad JV |
3132 | } |
3133 | } | |
1da177e4 | 3134 | |
b2220cad JV |
3135 | void bond_activebackup_arp_mon(struct work_struct *work) |
3136 | { | |
3137 | struct bonding *bond = container_of(work, struct bonding, | |
3138 | arp_work.work); | |
ad246c99 | 3139 | bool should_notify_peers = false; |
b2220cad | 3140 | int delta_in_ticks; |
1da177e4 | 3141 | |
b2220cad | 3142 | read_lock(&bond->lock); |
1da177e4 | 3143 | |
b2220cad | 3144 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3145 | |
b2220cad JV |
3146 | if (bond->slave_cnt == 0) |
3147 | goto re_arm; | |
3148 | ||
ad246c99 BH |
3149 | should_notify_peers = bond_should_notify_peers(bond); |
3150 | ||
b2220cad JV |
3151 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3152 | read_unlock(&bond->lock); | |
e6d265e8 JV |
3153 | |
3154 | /* Race avoidance with bond_close flush of workqueue */ | |
3155 | if (!rtnl_trylock()) { | |
3156 | read_lock(&bond->lock); | |
3157 | delta_in_ticks = 1; | |
3158 | should_notify_peers = false; | |
3159 | goto re_arm; | |
3160 | } | |
3161 | ||
b2220cad JV |
3162 | read_lock(&bond->lock); |
3163 | ||
3164 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3165 | ||
3166 | read_unlock(&bond->lock); | |
3167 | rtnl_unlock(); | |
3168 | read_lock(&bond->lock); | |
1da177e4 LT |
3169 | } |
3170 | ||
b2220cad JV |
3171 | bond_ab_arp_probe(bond); |
3172 | ||
1da177e4 | 3173 | re_arm: |
e6d265e8 | 3174 | if (bond->params.arp_interval) |
1b76b316 | 3175 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
e6d265e8 | 3176 | |
1da177e4 | 3177 | read_unlock(&bond->lock); |
ad246c99 BH |
3178 | |
3179 | if (should_notify_peers) { | |
e6d265e8 JV |
3180 | if (!rtnl_trylock()) { |
3181 | read_lock(&bond->lock); | |
3182 | bond->send_peer_notif++; | |
3183 | read_unlock(&bond->lock); | |
3184 | return; | |
3185 | } | |
ad246c99 BH |
3186 | netdev_bonding_change(bond->dev, NETDEV_NOTIFY_PEERS); |
3187 | rtnl_unlock(); | |
3188 | } | |
1da177e4 LT |
3189 | } |
3190 | ||
1da177e4 LT |
3191 | /*-------------------------- netdev event handling --------------------------*/ |
3192 | ||
3193 | /* | |
3194 | * Change device name | |
3195 | */ | |
3196 | static int bond_event_changename(struct bonding *bond) | |
3197 | { | |
1da177e4 LT |
3198 | bond_remove_proc_entry(bond); |
3199 | bond_create_proc_entry(bond); | |
7e083840 | 3200 | |
f073c7ca TI |
3201 | bond_debug_reregister(bond); |
3202 | ||
1da177e4 LT |
3203 | return NOTIFY_DONE; |
3204 | } | |
3205 | ||
3d632c3f SH |
3206 | static int bond_master_netdev_event(unsigned long event, |
3207 | struct net_device *bond_dev) | |
1da177e4 | 3208 | { |
454d7c9b | 3209 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3210 | |
3211 | switch (event) { | |
3212 | case NETDEV_CHANGENAME: | |
3213 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3214 | default: |
3215 | break; | |
3216 | } | |
3217 | ||
3218 | return NOTIFY_DONE; | |
3219 | } | |
3220 | ||
3d632c3f SH |
3221 | static int bond_slave_netdev_event(unsigned long event, |
3222 | struct net_device *slave_dev) | |
1da177e4 LT |
3223 | { |
3224 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3225 | struct bonding *bond = netdev_priv(bond_dev); |
98f41f69 | 3226 | struct slave *slave = NULL; |
1da177e4 LT |
3227 | |
3228 | switch (event) { | |
3229 | case NETDEV_UNREGISTER: | |
3230 | if (bond_dev) { | |
1284cd3a JV |
3231 | if (bond->setup_by_slave) |
3232 | bond_release_and_destroy(bond_dev, slave_dev); | |
3233 | else | |
3234 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3235 | } |
3236 | break; | |
98f41f69 | 3237 | case NETDEV_UP: |
1da177e4 | 3238 | case NETDEV_CHANGE: |
98f41f69 WP |
3239 | slave = bond_get_slave_by_dev(bond, slave_dev); |
3240 | if (slave) { | |
3241 | u32 old_speed = slave->speed; | |
3242 | u8 old_duplex = slave->duplex; | |
17d04500 | 3243 | |
98f41f69 | 3244 | bond_update_speed_duplex(slave); |
17d04500 | 3245 | |
98f41f69 | 3246 | if (bond->params.mode == BOND_MODE_8023AD) { |
17d04500 JV |
3247 | if (old_speed != slave->speed) |
3248 | bond_3ad_adapter_speed_changed(slave); | |
3249 | if (old_duplex != slave->duplex) | |
3250 | bond_3ad_adapter_duplex_changed(slave); | |
3251 | } | |
3252 | } | |
3253 | ||
1da177e4 LT |
3254 | break; |
3255 | case NETDEV_DOWN: | |
3256 | /* | |
3257 | * ... Or is it this? | |
3258 | */ | |
3259 | break; | |
3260 | case NETDEV_CHANGEMTU: | |
3261 | /* | |
3262 | * TODO: Should slaves be allowed to | |
3263 | * independently alter their MTU? For | |
3264 | * an active-backup bond, slaves need | |
3265 | * not be the same type of device, so | |
3266 | * MTUs may vary. For other modes, | |
3267 | * slaves arguably should have the | |
3268 | * same MTUs. To do this, we'd need to | |
3269 | * take over the slave's change_mtu | |
3270 | * function for the duration of their | |
3271 | * servitude. | |
3272 | */ | |
3273 | break; | |
3274 | case NETDEV_CHANGENAME: | |
3275 | /* | |
3276 | * TODO: handle changing the primary's name | |
3277 | */ | |
3278 | break; | |
8531c5ff AK |
3279 | case NETDEV_FEAT_CHANGE: |
3280 | bond_compute_features(bond); | |
3281 | break; | |
1da177e4 LT |
3282 | default: |
3283 | break; | |
3284 | } | |
3285 | ||
3286 | return NOTIFY_DONE; | |
3287 | } | |
3288 | ||
3289 | /* | |
3290 | * bond_netdev_event: handle netdev notifier chain events. | |
3291 | * | |
3292 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3293 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3294 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3295 | * dev_probe_lock). | |
3296 | */ | |
3d632c3f SH |
3297 | static int bond_netdev_event(struct notifier_block *this, |
3298 | unsigned long event, void *ptr) | |
1da177e4 LT |
3299 | { |
3300 | struct net_device *event_dev = (struct net_device *)ptr; | |
3301 | ||
5a03cdb7 | 3302 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3303 | event_dev ? event_dev->name : "None", |
3304 | event); | |
1da177e4 | 3305 | |
0b680e75 JV |
3306 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3307 | return NOTIFY_DONE; | |
3308 | ||
1da177e4 | 3309 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3310 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3311 | return bond_master_netdev_event(event, event_dev); |
3312 | } | |
3313 | ||
3314 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3315 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3316 | return bond_slave_netdev_event(event, event_dev); |
3317 | } | |
3318 | ||
3319 | return NOTIFY_DONE; | |
3320 | } | |
3321 | ||
3322 | static struct notifier_block bond_netdev_notifier = { | |
3323 | .notifier_call = bond_netdev_event, | |
3324 | }; | |
3325 | ||
169a3e66 JV |
3326 | /*---------------------------- Hashing Policies -----------------------------*/ |
3327 | ||
6f6652be JV |
3328 | /* |
3329 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3330 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3331 | */ | |
a361c83c | 3332 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3333 | { |
3334 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3335 | struct iphdr *iph = ip_hdr(skb); | |
3336 | ||
f14c4e4e | 3337 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3338 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3339 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3340 | } |
3341 | ||
d3da6831 | 3342 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3343 | } |
3344 | ||
169a3e66 | 3345 | /* |
59c51591 | 3346 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3347 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3348 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3349 | */ | |
a361c83c | 3350 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3351 | { |
3352 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3353 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3354 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3355 | int layer4_xor = 0; |
3356 | ||
f14c4e4e | 3357 | if (skb->protocol == htons(ETH_P_IP)) { |
56f8a75c | 3358 | if (!ip_is_fragment(iph) && |
169a3e66 JV |
3359 | (iph->protocol == IPPROTO_TCP || |
3360 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3361 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3362 | } |
3363 | return (layer4_xor ^ | |
3364 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3365 | ||
3366 | } | |
3367 | ||
d3da6831 | 3368 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3369 | } |
3370 | ||
3371 | /* | |
3372 | * Hash for the output device based upon layer 2 data | |
3373 | */ | |
a361c83c | 3374 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3375 | { |
3376 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3377 | ||
d3da6831 | 3378 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3379 | } |
3380 | ||
1da177e4 LT |
3381 | /*-------------------------- Device entry points ----------------------------*/ |
3382 | ||
3383 | static int bond_open(struct net_device *bond_dev) | |
3384 | { | |
454d7c9b | 3385 | struct bonding *bond = netdev_priv(bond_dev); |
ba3211cc PP |
3386 | struct slave *slave; |
3387 | int i; | |
1da177e4 | 3388 | |
ba3211cc PP |
3389 | /* reset slave->backup and slave->inactive */ |
3390 | read_lock(&bond->lock); | |
3391 | if (bond->slave_cnt > 0) { | |
3392 | read_lock(&bond->curr_slave_lock); | |
3393 | bond_for_each_slave(bond, slave, i) { | |
3394 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
3395 | && (slave != bond->curr_active_slave)) { | |
3396 | bond_set_slave_inactive_flags(slave); | |
3397 | } else { | |
3398 | bond_set_slave_active_flags(slave); | |
3399 | } | |
3400 | } | |
3401 | read_unlock(&bond->curr_slave_lock); | |
3402 | } | |
3403 | read_unlock(&bond->lock); | |
3404 | ||
5a37e8ca FL |
3405 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3406 | ||
58402054 | 3407 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3408 | /* bond_alb_initialize must be called before the timer |
3409 | * is started. | |
3410 | */ | |
3411 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3412 | /* something went wrong - fail the open operation */ | |
b473946a | 3413 | return -ENOMEM; |
1da177e4 LT |
3414 | } |
3415 | ||
1b76b316 JV |
3416 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3417 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3418 | } |
3419 | ||
3420 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3421 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3422 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3423 | } |
3424 | ||
3425 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3426 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3427 | INIT_DELAYED_WORK(&bond->arp_work, | |
3428 | bond_activebackup_arp_mon); | |
3429 | else | |
3430 | INIT_DELAYED_WORK(&bond->arp_work, | |
3431 | bond_loadbalance_arp_mon); | |
3432 | ||
3433 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 | 3434 | if (bond->params.arp_validate) |
3aba891d | 3435 | bond->recv_probe = bond_arp_rcv; |
1da177e4 LT |
3436 | } |
3437 | ||
3438 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3439 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3440 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 | 3441 | /* register to receive LACPDUs */ |
3aba891d | 3442 | bond->recv_probe = bond_3ad_lacpdu_recv; |
fd989c83 | 3443 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3444 | } |
3445 | ||
3446 | return 0; | |
3447 | } | |
3448 | ||
3449 | static int bond_close(struct net_device *bond_dev) | |
3450 | { | |
454d7c9b | 3451 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3452 | |
1da177e4 LT |
3453 | write_lock_bh(&bond->lock); |
3454 | ||
ad246c99 BH |
3455 | bond->send_peer_notif = 0; |
3456 | ||
1da177e4 LT |
3457 | write_unlock_bh(&bond->lock); |
3458 | ||
1da177e4 | 3459 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
e6d265e8 | 3460 | cancel_delayed_work_sync(&bond->mii_work); |
1da177e4 LT |
3461 | } |
3462 | ||
3463 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
e6d265e8 | 3464 | cancel_delayed_work_sync(&bond->arp_work); |
1da177e4 LT |
3465 | } |
3466 | ||
3467 | switch (bond->params.mode) { | |
3468 | case BOND_MODE_8023AD: | |
e6d265e8 | 3469 | cancel_delayed_work_sync(&bond->ad_work); |
1da177e4 LT |
3470 | break; |
3471 | case BOND_MODE_TLB: | |
3472 | case BOND_MODE_ALB: | |
e6d265e8 | 3473 | cancel_delayed_work_sync(&bond->alb_work); |
1da177e4 LT |
3474 | break; |
3475 | default: | |
3476 | break; | |
3477 | } | |
3478 | ||
5a37e8ca | 3479 | if (delayed_work_pending(&bond->mcast_work)) |
e6d265e8 | 3480 | cancel_delayed_work_sync(&bond->mcast_work); |
1da177e4 | 3481 | |
58402054 | 3482 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3483 | /* Must be called only after all |
3484 | * slaves have been released | |
3485 | */ | |
3486 | bond_alb_deinitialize(bond); | |
3487 | } | |
3aba891d | 3488 | bond->recv_probe = NULL; |
1da177e4 LT |
3489 | |
3490 | return 0; | |
3491 | } | |
3492 | ||
28172739 ED |
3493 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3494 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3495 | { |
454d7c9b | 3496 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3497 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3498 | struct slave *slave; |
3499 | int i; | |
3500 | ||
28172739 | 3501 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3502 | |
3503 | read_lock_bh(&bond->lock); | |
3504 | ||
3505 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3506 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
3507 | dev_get_stats(slave->dev, &temp); |
3508 | ||
3509 | stats->rx_packets += sstats->rx_packets; | |
3510 | stats->rx_bytes += sstats->rx_bytes; | |
3511 | stats->rx_errors += sstats->rx_errors; | |
3512 | stats->rx_dropped += sstats->rx_dropped; | |
3513 | ||
3514 | stats->tx_packets += sstats->tx_packets; | |
3515 | stats->tx_bytes += sstats->tx_bytes; | |
3516 | stats->tx_errors += sstats->tx_errors; | |
3517 | stats->tx_dropped += sstats->tx_dropped; | |
3518 | ||
3519 | stats->multicast += sstats->multicast; | |
3520 | stats->collisions += sstats->collisions; | |
3521 | ||
3522 | stats->rx_length_errors += sstats->rx_length_errors; | |
3523 | stats->rx_over_errors += sstats->rx_over_errors; | |
3524 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3525 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3526 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3527 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3528 | ||
3529 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3530 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3531 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3532 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3533 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
3534 | } |
3535 | ||
1da177e4 LT |
3536 | read_unlock_bh(&bond->lock); |
3537 | ||
3538 | return stats; | |
3539 | } | |
3540 | ||
3541 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3542 | { | |
3543 | struct net_device *slave_dev = NULL; | |
3544 | struct ifbond k_binfo; | |
3545 | struct ifbond __user *u_binfo = NULL; | |
3546 | struct ifslave k_sinfo; | |
3547 | struct ifslave __user *u_sinfo = NULL; | |
3548 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3549 | int res = 0; |
3550 | ||
a4aee5c8 | 3551 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
3552 | |
3553 | switch (cmd) { | |
1da177e4 LT |
3554 | case SIOCGMIIPHY: |
3555 | mii = if_mii(ifr); | |
3d632c3f | 3556 | if (!mii) |
1da177e4 | 3557 | return -EINVAL; |
3d632c3f | 3558 | |
1da177e4 LT |
3559 | mii->phy_id = 0; |
3560 | /* Fall Through */ | |
3561 | case SIOCGMIIREG: | |
3562 | /* | |
3563 | * We do this again just in case we were called by SIOCGMIIREG | |
3564 | * instead of SIOCGMIIPHY. | |
3565 | */ | |
3566 | mii = if_mii(ifr); | |
3d632c3f | 3567 | if (!mii) |
1da177e4 | 3568 | return -EINVAL; |
3d632c3f | 3569 | |
1da177e4 LT |
3570 | |
3571 | if (mii->reg_num == 1) { | |
454d7c9b | 3572 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3573 | mii->val_out = 0; |
6603a6f2 | 3574 | read_lock(&bond->lock); |
1da177e4 | 3575 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 3576 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 3577 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 3578 | |
1da177e4 | 3579 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 3580 | read_unlock(&bond->lock); |
1da177e4 LT |
3581 | } |
3582 | ||
3583 | return 0; | |
3584 | case BOND_INFO_QUERY_OLD: | |
3585 | case SIOCBONDINFOQUERY: | |
3586 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3587 | ||
3d632c3f | 3588 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 3589 | return -EFAULT; |
1da177e4 LT |
3590 | |
3591 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
3592 | if (res == 0 && |
3593 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
3594 | return -EFAULT; | |
1da177e4 LT |
3595 | |
3596 | return res; | |
3597 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3598 | case SIOCBONDSLAVEINFOQUERY: | |
3599 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3600 | ||
3d632c3f | 3601 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 3602 | return -EFAULT; |
1da177e4 LT |
3603 | |
3604 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
3605 | if (res == 0 && |
3606 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
3607 | return -EFAULT; | |
1da177e4 LT |
3608 | |
3609 | return res; | |
3610 | default: | |
3611 | /* Go on */ | |
3612 | break; | |
3613 | } | |
3614 | ||
3d632c3f | 3615 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 3616 | return -EPERM; |
1da177e4 | 3617 | |
ec87fd3b | 3618 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 3619 | |
a4aee5c8 | 3620 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 3621 | |
3d632c3f | 3622 | if (!slave_dev) |
1da177e4 | 3623 | res = -ENODEV; |
3d632c3f | 3624 | else { |
a4aee5c8 | 3625 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
3626 | switch (cmd) { |
3627 | case BOND_ENSLAVE_OLD: | |
3628 | case SIOCBONDENSLAVE: | |
3629 | res = bond_enslave(bond_dev, slave_dev); | |
3630 | break; | |
3631 | case BOND_RELEASE_OLD: | |
3632 | case SIOCBONDRELEASE: | |
3633 | res = bond_release(bond_dev, slave_dev); | |
3634 | break; | |
3635 | case BOND_SETHWADDR_OLD: | |
3636 | case SIOCBONDSETHWADDR: | |
3637 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3638 | break; | |
3639 | case BOND_CHANGE_ACTIVE_OLD: | |
3640 | case SIOCBONDCHANGEACTIVE: | |
3641 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3642 | break; | |
3643 | default: | |
3644 | res = -EOPNOTSUPP; | |
3645 | } | |
3646 | ||
3647 | dev_put(slave_dev); | |
3648 | } | |
3649 | ||
1da177e4 LT |
3650 | return res; |
3651 | } | |
3652 | ||
22bedad3 JP |
3653 | static bool bond_addr_in_mc_list(unsigned char *addr, |
3654 | struct netdev_hw_addr_list *list, | |
3655 | int addrlen) | |
3656 | { | |
3657 | struct netdev_hw_addr *ha; | |
3658 | ||
3659 | netdev_hw_addr_list_for_each(ha, list) | |
3660 | if (!memcmp(ha->addr, addr, addrlen)) | |
3661 | return true; | |
3662 | ||
3663 | return false; | |
3664 | } | |
3665 | ||
d03462b9 | 3666 | static void bond_change_rx_flags(struct net_device *bond_dev, int change) |
1da177e4 | 3667 | { |
454d7c9b | 3668 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3669 | |
d03462b9 JP |
3670 | if (change & IFF_PROMISC) |
3671 | bond_set_promiscuity(bond, | |
3672 | bond_dev->flags & IFF_PROMISC ? 1 : -1); | |
3d632c3f | 3673 | |
d03462b9 JP |
3674 | if (change & IFF_ALLMULTI) |
3675 | bond_set_allmulti(bond, | |
3676 | bond_dev->flags & IFF_ALLMULTI ? 1 : -1); | |
3677 | } | |
1da177e4 | 3678 | |
d03462b9 JP |
3679 | static void bond_set_multicast_list(struct net_device *bond_dev) |
3680 | { | |
3681 | struct bonding *bond = netdev_priv(bond_dev); | |
3682 | struct netdev_hw_addr *ha; | |
3683 | bool found; | |
1da177e4 | 3684 | |
80ee5ad2 JV |
3685 | read_lock(&bond->lock); |
3686 | ||
1da177e4 | 3687 | /* looking for addresses to add to slaves' mc list */ |
22bedad3 JP |
3688 | netdev_for_each_mc_addr(ha, bond_dev) { |
3689 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
3690 | bond_dev->addr_len); | |
3691 | if (!found) | |
3692 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
3693 | } |
3694 | ||
3695 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
3696 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
3697 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
3698 | bond_dev->addr_len); | |
3699 | if (!found) | |
3700 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
3701 | } |
3702 | ||
3703 | /* save master's multicast list */ | |
22bedad3 JP |
3704 | __hw_addr_flush(&bond->mc_list); |
3705 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
3706 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 3707 | |
80ee5ad2 | 3708 | read_unlock(&bond->lock); |
1da177e4 LT |
3709 | } |
3710 | ||
234bcf8a | 3711 | static int bond_neigh_init(struct neighbour *n) |
00829823 | 3712 | { |
234bcf8a | 3713 | struct bonding *bond = netdev_priv(n->dev); |
00829823 | 3714 | struct slave *slave = bond->first_slave; |
234bcf8a SP |
3715 | const struct net_device_ops *slave_ops; |
3716 | struct neigh_parms parms; | |
3717 | int ret; | |
3718 | ||
3719 | if (!slave) | |
3720 | return 0; | |
3721 | ||
3722 | slave_ops = slave->dev->netdev_ops; | |
3723 | ||
3724 | if (!slave_ops->ndo_neigh_setup) | |
3725 | return 0; | |
3726 | ||
3727 | parms.neigh_setup = NULL; | |
3728 | parms.neigh_cleanup = NULL; | |
3729 | ret = slave_ops->ndo_neigh_setup(slave->dev, &parms); | |
3730 | if (ret) | |
3731 | return ret; | |
3732 | ||
3733 | /* | |
3734 | * Assign slave's neigh_cleanup to neighbour in case cleanup is called | |
3735 | * after the last slave has been detached. Assumes that all slaves | |
3736 | * utilize the same neigh_cleanup (true at this writing as only user | |
3737 | * is ipoib). | |
3738 | */ | |
3739 | n->parms->neigh_cleanup = parms.neigh_cleanup; | |
3740 | ||
3741 | if (!parms.neigh_setup) | |
3742 | return 0; | |
3743 | ||
3744 | return parms.neigh_setup(n); | |
3745 | } | |
3746 | ||
3747 | /* | |
3748 | * The bonding ndo_neigh_setup is called at init time beofre any | |
3749 | * slave exists. So we must declare proxy setup function which will | |
3750 | * be used at run time to resolve the actual slave neigh param setup. | |
3751 | */ | |
3752 | static int bond_neigh_setup(struct net_device *dev, | |
3753 | struct neigh_parms *parms) | |
3754 | { | |
3755 | parms->neigh_setup = bond_neigh_init; | |
00829823 | 3756 | |
00829823 SH |
3757 | return 0; |
3758 | } | |
3759 | ||
1da177e4 LT |
3760 | /* |
3761 | * Change the MTU of all of a master's slaves to match the master | |
3762 | */ | |
3763 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3764 | { | |
454d7c9b | 3765 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3766 | struct slave *slave, *stop_at; |
3767 | int res = 0; | |
3768 | int i; | |
3769 | ||
5a03cdb7 | 3770 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 3771 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
3772 | |
3773 | /* Can't hold bond->lock with bh disabled here since | |
3774 | * some base drivers panic. On the other hand we can't | |
3775 | * hold bond->lock without bh disabled because we'll | |
3776 | * deadlock. The only solution is to rely on the fact | |
3777 | * that we're under rtnl_lock here, and the slaves | |
3778 | * list won't change. This doesn't solve the problem | |
3779 | * of setting the slave's MTU while it is | |
3780 | * transmitting, but the assumption is that the base | |
3781 | * driver can handle that. | |
3782 | * | |
3783 | * TODO: figure out a way to safely iterate the slaves | |
3784 | * list, but without holding a lock around the actual | |
3785 | * call to the base driver. | |
3786 | */ | |
3787 | ||
3788 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
3789 | pr_debug("s %p s->p %p c_m %p\n", |
3790 | slave, | |
3791 | slave->prev, | |
3792 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 3793 | |
1da177e4 LT |
3794 | res = dev_set_mtu(slave->dev, new_mtu); |
3795 | ||
3796 | if (res) { | |
3797 | /* If we failed to set the slave's mtu to the new value | |
3798 | * we must abort the operation even in ACTIVE_BACKUP | |
3799 | * mode, because if we allow the backup slaves to have | |
3800 | * different mtu values than the active slave we'll | |
3801 | * need to change their mtu when doing a failover. That | |
3802 | * means changing their mtu from timer context, which | |
3803 | * is probably not a good idea. | |
3804 | */ | |
5a03cdb7 | 3805 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3806 | goto unwind; |
3807 | } | |
3808 | } | |
3809 | ||
3810 | bond_dev->mtu = new_mtu; | |
3811 | ||
3812 | return 0; | |
3813 | ||
3814 | unwind: | |
3815 | /* unwind from head to the slave that failed */ | |
3816 | stop_at = slave; | |
3817 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3818 | int tmp_res; | |
3819 | ||
3820 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3821 | if (tmp_res) { | |
a4aee5c8 JP |
3822 | pr_debug("unwind err %d dev %s\n", |
3823 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3824 | } |
3825 | } | |
3826 | ||
3827 | return res; | |
3828 | } | |
3829 | ||
3830 | /* | |
3831 | * Change HW address | |
3832 | * | |
3833 | * Note that many devices must be down to change the HW address, and | |
3834 | * downing the master releases all slaves. We can make bonds full of | |
3835 | * bonding devices to test this, however. | |
3836 | */ | |
3837 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3838 | { | |
454d7c9b | 3839 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3840 | struct sockaddr *sa = addr, tmp_sa; |
3841 | struct slave *slave, *stop_at; | |
3842 | int res = 0; | |
3843 | int i; | |
3844 | ||
eb7cc59a SH |
3845 | if (bond->params.mode == BOND_MODE_ALB) |
3846 | return bond_alb_set_mac_address(bond_dev, addr); | |
3847 | ||
3848 | ||
a4aee5c8 JP |
3849 | pr_debug("bond=%p, name=%s\n", |
3850 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 3851 | |
dd957c57 | 3852 | /* |
3915c1e8 JV |
3853 | * If fail_over_mac is set to active, do nothing and return |
3854 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 3855 | */ |
3915c1e8 | 3856 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 3857 | return 0; |
2ab82852 | 3858 | |
3d632c3f | 3859 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 3860 | return -EADDRNOTAVAIL; |
1da177e4 LT |
3861 | |
3862 | /* Can't hold bond->lock with bh disabled here since | |
3863 | * some base drivers panic. On the other hand we can't | |
3864 | * hold bond->lock without bh disabled because we'll | |
3865 | * deadlock. The only solution is to rely on the fact | |
3866 | * that we're under rtnl_lock here, and the slaves | |
3867 | * list won't change. This doesn't solve the problem | |
3868 | * of setting the slave's hw address while it is | |
3869 | * transmitting, but the assumption is that the base | |
3870 | * driver can handle that. | |
3871 | * | |
3872 | * TODO: figure out a way to safely iterate the slaves | |
3873 | * list, but without holding a lock around the actual | |
3874 | * call to the base driver. | |
3875 | */ | |
3876 | ||
3877 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 3878 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 3879 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 3880 | |
eb7cc59a | 3881 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 3882 | res = -EOPNOTSUPP; |
5a03cdb7 | 3883 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
3884 | goto unwind; |
3885 | } | |
3886 | ||
3887 | res = dev_set_mac_address(slave->dev, addr); | |
3888 | if (res) { | |
3889 | /* TODO: consider downing the slave | |
3890 | * and retry ? | |
3891 | * User should expect communications | |
3892 | * breakage anyway until ARP finish | |
3893 | * updating, so... | |
3894 | */ | |
5a03cdb7 | 3895 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
3896 | goto unwind; |
3897 | } | |
3898 | } | |
3899 | ||
3900 | /* success */ | |
3901 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3902 | return 0; | |
3903 | ||
3904 | unwind: | |
3905 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3906 | tmp_sa.sa_family = bond_dev->type; | |
3907 | ||
3908 | /* unwind from head to the slave that failed */ | |
3909 | stop_at = slave; | |
3910 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3911 | int tmp_res; | |
3912 | ||
3913 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3914 | if (tmp_res) { | |
a4aee5c8 JP |
3915 | pr_debug("unwind err %d dev %s\n", |
3916 | tmp_res, slave->dev->name); | |
1da177e4 LT |
3917 | } |
3918 | } | |
3919 | ||
3920 | return res; | |
3921 | } | |
3922 | ||
3923 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3924 | { | |
454d7c9b | 3925 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3926 | struct slave *slave, *start_at; |
cf5f9044 | 3927 | int i, slave_no, res = 1; |
a2fd940f | 3928 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 | 3929 | |
cf5f9044 | 3930 | /* |
a2fd940f AG |
3931 | * Start with the curr_active_slave that joined the bond as the |
3932 | * default for sending IGMP traffic. For failover purposes one | |
3933 | * needs to maintain some consistency for the interface that will | |
3934 | * send the join/membership reports. The curr_active_slave found | |
3935 | * will send all of this type of traffic. | |
cf5f9044 | 3936 | */ |
00ae7028 | 3937 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 3938 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 3939 | |
a2fd940f AG |
3940 | read_lock(&bond->curr_slave_lock); |
3941 | slave = bond->curr_active_slave; | |
3942 | read_unlock(&bond->curr_slave_lock); | |
3943 | ||
3944 | if (!slave) | |
3945 | goto out; | |
3946 | } else { | |
3947 | /* | |
3948 | * Concurrent TX may collide on rr_tx_counter; we accept | |
3949 | * that as being rare enough not to justify using an | |
3950 | * atomic op here. | |
3951 | */ | |
3952 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
3953 | ||
3954 | bond_for_each_slave(bond, slave, i) { | |
3955 | slave_no--; | |
3956 | if (slave_no < 0) | |
3957 | break; | |
3958 | } | |
1da177e4 LT |
3959 | } |
3960 | ||
cf5f9044 | 3961 | start_at = slave; |
1da177e4 LT |
3962 | bond_for_each_slave_from(bond, slave, i, start_at) { |
3963 | if (IS_UP(slave->dev) && | |
3964 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 3965 | bond_is_active_slave(slave)) { |
1da177e4 | 3966 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
1da177e4 LT |
3967 | break; |
3968 | } | |
3969 | } | |
3970 | ||
1da177e4 LT |
3971 | out: |
3972 | if (res) { | |
3973 | /* no suitable interface, frame not sent */ | |
3974 | dev_kfree_skb(skb); | |
3975 | } | |
0693e88e | 3976 | |
ec634fe3 | 3977 | return NETDEV_TX_OK; |
1da177e4 LT |
3978 | } |
3979 | ||
075897ce | 3980 | |
1da177e4 LT |
3981 | /* |
3982 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3983 | * the bond has a usable interface. | |
3984 | */ | |
3985 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3986 | { | |
454d7c9b | 3987 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3988 | int res = 1; |
3989 | ||
1da177e4 LT |
3990 | read_lock(&bond->curr_slave_lock); |
3991 | ||
0693e88e MM |
3992 | if (bond->curr_active_slave) |
3993 | res = bond_dev_queue_xmit(bond, skb, | |
3994 | bond->curr_active_slave->dev); | |
1da177e4 | 3995 | |
3d632c3f | 3996 | if (res) |
1da177e4 LT |
3997 | /* no suitable interface, frame not sent */ |
3998 | dev_kfree_skb(skb); | |
3d632c3f | 3999 | |
1da177e4 | 4000 | read_unlock(&bond->curr_slave_lock); |
0693e88e | 4001 | |
ec634fe3 | 4002 | return NETDEV_TX_OK; |
1da177e4 LT |
4003 | } |
4004 | ||
4005 | /* | |
169a3e66 JV |
4006 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4007 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4008 | * find the next active slave. | |
1da177e4 LT |
4009 | */ |
4010 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4011 | { | |
454d7c9b | 4012 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4013 | struct slave *slave, *start_at; |
4014 | int slave_no; | |
4015 | int i; | |
4016 | int res = 1; | |
4017 | ||
a361c83c | 4018 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4019 | |
4020 | bond_for_each_slave(bond, slave, i) { | |
4021 | slave_no--; | |
3d632c3f | 4022 | if (slave_no < 0) |
1da177e4 | 4023 | break; |
1da177e4 LT |
4024 | } |
4025 | ||
4026 | start_at = slave; | |
4027 | ||
4028 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4029 | if (IS_UP(slave->dev) && | |
4030 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4031 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4032 | res = bond_dev_queue_xmit(bond, skb, slave->dev); |
4033 | break; | |
4034 | } | |
4035 | } | |
4036 | ||
1da177e4 LT |
4037 | if (res) { |
4038 | /* no suitable interface, frame not sent */ | |
4039 | dev_kfree_skb(skb); | |
4040 | } | |
0693e88e | 4041 | |
ec634fe3 | 4042 | return NETDEV_TX_OK; |
1da177e4 LT |
4043 | } |
4044 | ||
4045 | /* | |
4046 | * in broadcast mode, we send everything to all usable interfaces. | |
4047 | */ | |
4048 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4049 | { | |
454d7c9b | 4050 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4051 | struct slave *slave, *start_at; |
4052 | struct net_device *tx_dev = NULL; | |
4053 | int i; | |
4054 | int res = 1; | |
4055 | ||
1da177e4 LT |
4056 | read_lock(&bond->curr_slave_lock); |
4057 | start_at = bond->curr_active_slave; | |
4058 | read_unlock(&bond->curr_slave_lock); | |
4059 | ||
3d632c3f | 4060 | if (!start_at) |
1da177e4 | 4061 | goto out; |
1da177e4 LT |
4062 | |
4063 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4064 | if (IS_UP(slave->dev) && | |
4065 | (slave->link == BOND_LINK_UP) && | |
e30bc066 | 4066 | bond_is_active_slave(slave)) { |
1da177e4 LT |
4067 | if (tx_dev) { |
4068 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4069 | if (!skb2) { | |
a4aee5c8 | 4070 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4071 | bond_dev->name); |
1da177e4 LT |
4072 | continue; |
4073 | } | |
4074 | ||
4075 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4076 | if (res) { | |
4077 | dev_kfree_skb(skb2); | |
4078 | continue; | |
4079 | } | |
4080 | } | |
4081 | tx_dev = slave->dev; | |
4082 | } | |
4083 | } | |
4084 | ||
3d632c3f | 4085 | if (tx_dev) |
1da177e4 | 4086 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4087 | |
4088 | out: | |
3d632c3f | 4089 | if (res) |
1da177e4 LT |
4090 | /* no suitable interface, frame not sent */ |
4091 | dev_kfree_skb(skb); | |
3d632c3f | 4092 | |
1da177e4 | 4093 | /* frame sent to all suitable interfaces */ |
ec634fe3 | 4094 | return NETDEV_TX_OK; |
1da177e4 LT |
4095 | } |
4096 | ||
4097 | /*------------------------- Device initialization ---------------------------*/ | |
4098 | ||
6f6652be JV |
4099 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4100 | { | |
4101 | switch (bond->params.xmit_policy) { | |
4102 | case BOND_XMIT_POLICY_LAYER23: | |
4103 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4104 | break; | |
4105 | case BOND_XMIT_POLICY_LAYER34: | |
4106 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4107 | break; | |
4108 | case BOND_XMIT_POLICY_LAYER2: | |
4109 | default: | |
4110 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4111 | break; | |
4112 | } | |
4113 | } | |
4114 | ||
bb1d9123 AG |
4115 | /* |
4116 | * Lookup the slave that corresponds to a qid | |
4117 | */ | |
4118 | static inline int bond_slave_override(struct bonding *bond, | |
4119 | struct sk_buff *skb) | |
4120 | { | |
4121 | int i, res = 1; | |
4122 | struct slave *slave = NULL; | |
4123 | struct slave *check_slave; | |
4124 | ||
0693e88e MM |
4125 | if (!skb->queue_mapping) |
4126 | return 1; | |
bb1d9123 AG |
4127 | |
4128 | /* Find out if any slaves have the same mapping as this skb. */ | |
4129 | bond_for_each_slave(bond, check_slave, i) { | |
4130 | if (check_slave->queue_id == skb->queue_mapping) { | |
4131 | slave = check_slave; | |
4132 | break; | |
4133 | } | |
4134 | } | |
4135 | ||
4136 | /* If the slave isn't UP, use default transmit policy. */ | |
4137 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4138 | (slave->link == BOND_LINK_UP)) { | |
4139 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4140 | } | |
4141 | ||
bb1d9123 AG |
4142 | return res; |
4143 | } | |
4144 | ||
374eeb5a | 4145 | |
bb1d9123 AG |
4146 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) |
4147 | { | |
4148 | /* | |
4149 | * This helper function exists to help dev_pick_tx get the correct | |
fd0e435b | 4150 | * destination queue. Using a helper function skips a call to |
bb1d9123 AG |
4151 | * skb_tx_hash and will put the skbs in the queue we expect on their |
4152 | * way down to the bonding driver. | |
4153 | */ | |
fd0e435b PO |
4154 | u16 txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) : 0; |
4155 | ||
374eeb5a NH |
4156 | /* |
4157 | * Save the original txq to restore before passing to the driver | |
4158 | */ | |
4159 | bond_queue_mapping(skb) = skb->queue_mapping; | |
4160 | ||
fd0e435b | 4161 | if (unlikely(txq >= dev->real_num_tx_queues)) { |
d30ee670 | 4162 | do { |
fd0e435b | 4163 | txq -= dev->real_num_tx_queues; |
d30ee670 | 4164 | } while (txq >= dev->real_num_tx_queues); |
fd0e435b PO |
4165 | } |
4166 | return txq; | |
bb1d9123 AG |
4167 | } |
4168 | ||
0693e88e | 4169 | static netdev_tx_t __bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4170 | { |
bb1d9123 AG |
4171 | struct bonding *bond = netdev_priv(dev); |
4172 | ||
4173 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { | |
4174 | if (!bond_slave_override(bond, skb)) | |
4175 | return NETDEV_TX_OK; | |
4176 | } | |
00829823 SH |
4177 | |
4178 | switch (bond->params.mode) { | |
4179 | case BOND_MODE_ROUNDROBIN: | |
4180 | return bond_xmit_roundrobin(skb, dev); | |
4181 | case BOND_MODE_ACTIVEBACKUP: | |
4182 | return bond_xmit_activebackup(skb, dev); | |
4183 | case BOND_MODE_XOR: | |
4184 | return bond_xmit_xor(skb, dev); | |
4185 | case BOND_MODE_BROADCAST: | |
4186 | return bond_xmit_broadcast(skb, dev); | |
4187 | case BOND_MODE_8023AD: | |
4188 | return bond_3ad_xmit_xor(skb, dev); | |
4189 | case BOND_MODE_ALB: | |
4190 | case BOND_MODE_TLB: | |
4191 | return bond_alb_xmit(skb, dev); | |
4192 | default: | |
4193 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4194 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4195 | dev->name, bond->params.mode); | |
00829823 SH |
4196 | WARN_ON_ONCE(1); |
4197 | dev_kfree_skb(skb); | |
4198 | return NETDEV_TX_OK; | |
4199 | } | |
4200 | } | |
4201 | ||
0693e88e MM |
4202 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4203 | { | |
4204 | struct bonding *bond = netdev_priv(dev); | |
4205 | netdev_tx_t ret = NETDEV_TX_OK; | |
4206 | ||
4207 | /* | |
4208 | * If we risk deadlock from transmitting this in the | |
4209 | * netpoll path, tell netpoll to queue the frame for later tx | |
4210 | */ | |
4211 | if (is_netpoll_tx_blocked(dev)) | |
4212 | return NETDEV_TX_BUSY; | |
4213 | ||
4214 | read_lock(&bond->lock); | |
4215 | ||
4216 | if (bond->slave_cnt) | |
4217 | ret = __bond_start_xmit(skb, dev); | |
4218 | else | |
4219 | dev_kfree_skb(skb); | |
4220 | ||
4221 | read_unlock(&bond->lock); | |
4222 | ||
4223 | return ret; | |
4224 | } | |
00829823 | 4225 | |
1da177e4 LT |
4226 | /* |
4227 | * set bond mode specific net device operations | |
4228 | */ | |
a77b5325 | 4229 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4230 | { |
169a3e66 JV |
4231 | struct net_device *bond_dev = bond->dev; |
4232 | ||
1da177e4 LT |
4233 | switch (mode) { |
4234 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4235 | break; |
4236 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4237 | break; |
4238 | case BOND_MODE_XOR: | |
6f6652be | 4239 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4240 | break; |
4241 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4242 | break; |
4243 | case BOND_MODE_8023AD: | |
6f6652be | 4244 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4245 | break; |
1da177e4 | 4246 | case BOND_MODE_ALB: |
8f903c70 JV |
4247 | /* FALLTHRU */ |
4248 | case BOND_MODE_TLB: | |
1da177e4 LT |
4249 | break; |
4250 | default: | |
4251 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4252 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4253 | bond_dev->name, mode); | |
1da177e4 LT |
4254 | break; |
4255 | } | |
4256 | } | |
4257 | ||
217df670 JV |
4258 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4259 | struct ethtool_drvinfo *drvinfo) | |
4260 | { | |
4261 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4262 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4263 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4264 | } | |
4265 | ||
7282d491 | 4266 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4267 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac | 4268 | .get_link = ethtool_op_get_link, |
8531c5ff AK |
4269 | }; |
4270 | ||
eb7cc59a | 4271 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4272 | .ndo_init = bond_init, |
9e71626c | 4273 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4274 | .ndo_open = bond_open, |
4275 | .ndo_stop = bond_close, | |
00829823 | 4276 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4277 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4278 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a | 4279 | .ndo_do_ioctl = bond_do_ioctl, |
d03462b9 | 4280 | .ndo_change_rx_flags = bond_change_rx_flags, |
afc4b13d | 4281 | .ndo_set_rx_mode = bond_set_multicast_list, |
eb7cc59a | 4282 | .ndo_change_mtu = bond_change_mtu, |
cc0e4070 | 4283 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4284 | .ndo_neigh_setup = bond_neigh_setup, |
cc0e4070 | 4285 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, |
eb7cc59a | 4286 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, |
f6dc31a8 | 4287 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4288 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4289 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4290 | .ndo_poll_controller = bond_poll_controller, | |
4291 | #endif | |
9232ecca JP |
4292 | .ndo_add_slave = bond_enslave, |
4293 | .ndo_del_slave = bond_release, | |
b2a103e6 | 4294 | .ndo_fix_features = bond_fix_features, |
eb7cc59a SH |
4295 | }; |
4296 | ||
9e2e61fb AW |
4297 | static void bond_destructor(struct net_device *bond_dev) |
4298 | { | |
4299 | struct bonding *bond = netdev_priv(bond_dev); | |
4300 | if (bond->wq) | |
4301 | destroy_workqueue(bond->wq); | |
4302 | free_netdev(bond_dev); | |
4303 | } | |
4304 | ||
181470fc | 4305 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4306 | { |
454d7c9b | 4307 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4308 | |
1da177e4 LT |
4309 | /* initialize rwlocks */ |
4310 | rwlock_init(&bond->lock); | |
4311 | rwlock_init(&bond->curr_slave_lock); | |
4312 | ||
d2991f75 | 4313 | bond->params = bonding_defaults; |
1da177e4 LT |
4314 | |
4315 | /* Initialize pointers */ | |
1da177e4 LT |
4316 | bond->dev = bond_dev; |
4317 | INIT_LIST_HEAD(&bond->vlan_list); | |
4318 | ||
4319 | /* Initialize the device entry points */ | |
181470fc | 4320 | ether_setup(bond_dev); |
eb7cc59a | 4321 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4322 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4323 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4324 | |
9e2e61fb | 4325 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4326 | |
4327 | /* Initialize the device options */ | |
4328 | bond_dev->tx_queue_len = 0; | |
4329 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4330 | bond_dev->priv_flags |= IFF_BONDING; |
550fd08c | 4331 | bond_dev->priv_flags &= ~(IFF_XMIT_DST_RELEASE | IFF_TX_SKB_SHARING); |
181470fc | 4332 | |
1da177e4 LT |
4333 | /* At first, we block adding VLANs. That's the only way to |
4334 | * prevent problems that occur when adding VLANs over an | |
4335 | * empty bond. The block will be removed once non-challenged | |
4336 | * slaves are enslaved. | |
4337 | */ | |
4338 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4339 | ||
932ff279 | 4340 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4341 | * transmitting */ |
4342 | bond_dev->features |= NETIF_F_LLTX; | |
4343 | ||
4344 | /* By default, we declare the bond to be fully | |
4345 | * VLAN hardware accelerated capable. Special | |
4346 | * care is taken in the various xmit functions | |
4347 | * when there are slaves that are not hw accel | |
4348 | * capable | |
4349 | */ | |
1da177e4 | 4350 | |
b2a103e6 MM |
4351 | bond_dev->hw_features = BOND_VLAN_FEATURES | |
4352 | NETIF_F_HW_VLAN_TX | | |
4353 | NETIF_F_HW_VLAN_RX | | |
4354 | NETIF_F_HW_VLAN_FILTER; | |
4355 | ||
34324dc2 | 4356 | bond_dev->hw_features &= ~(NETIF_F_ALL_CSUM & ~NETIF_F_HW_CSUM); |
b2a103e6 | 4357 | bond_dev->features |= bond_dev->hw_features; |
1da177e4 LT |
4358 | } |
4359 | ||
fdaea7a9 JV |
4360 | static void bond_work_cancel_all(struct bonding *bond) |
4361 | { | |
fdaea7a9 | 4362 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) |
e6d265e8 | 4363 | cancel_delayed_work_sync(&bond->mii_work); |
fdaea7a9 JV |
4364 | |
4365 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
e6d265e8 | 4366 | cancel_delayed_work_sync(&bond->arp_work); |
fdaea7a9 JV |
4367 | |
4368 | if (bond->params.mode == BOND_MODE_ALB && | |
4369 | delayed_work_pending(&bond->alb_work)) | |
e6d265e8 | 4370 | cancel_delayed_work_sync(&bond->alb_work); |
fdaea7a9 JV |
4371 | |
4372 | if (bond->params.mode == BOND_MODE_8023AD && | |
4373 | delayed_work_pending(&bond->ad_work)) | |
e6d265e8 | 4374 | cancel_delayed_work_sync(&bond->ad_work); |
5a37e8ca FL |
4375 | |
4376 | if (delayed_work_pending(&bond->mcast_work)) | |
e6d265e8 | 4377 | cancel_delayed_work_sync(&bond->mcast_work); |
fdaea7a9 JV |
4378 | } |
4379 | ||
c67dfb29 EB |
4380 | /* |
4381 | * Destroy a bonding device. | |
4382 | * Must be under rtnl_lock when this function is called. | |
4383 | */ | |
4384 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4385 | { |
454d7c9b | 4386 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4387 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4388 | |
f6dc31a8 WC |
4389 | bond_netpoll_cleanup(bond_dev); |
4390 | ||
c67dfb29 EB |
4391 | /* Release the bonded slaves */ |
4392 | bond_release_all(bond_dev); | |
4393 | ||
a434e43f JV |
4394 | list_del(&bond->bond_list); |
4395 | ||
4396 | bond_work_cancel_all(bond); | |
4397 | ||
a434e43f | 4398 | bond_remove_proc_entry(bond); |
c67dfb29 | 4399 | |
f073c7ca TI |
4400 | bond_debug_unregister(bond); |
4401 | ||
22bedad3 | 4402 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4403 | |
4404 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4405 | list_del(&vlan->vlan_list); | |
4406 | kfree(vlan); | |
4407 | } | |
a434e43f JV |
4408 | } |
4409 | ||
1da177e4 LT |
4410 | /*------------------------- Module initialization ---------------------------*/ |
4411 | ||
4412 | /* | |
4413 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4414 | * number of the mode or its string name. A bit complicated because |
4415 | * some mode names are substrings of other names, and calls from sysfs | |
4416 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4417 | */ |
325dcf7a | 4418 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4419 | { |
54b87323 | 4420 | int modeint = -1, i, rv; |
a42e534f | 4421 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4422 | |
a42e534f JV |
4423 | for (p = (char *)buf; *p; p++) |
4424 | if (!(isdigit(*p) || isspace(*p))) | |
4425 | break; | |
4426 | ||
4427 | if (*p) | |
ece95f7f | 4428 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4429 | else |
54b87323 | 4430 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4431 | |
4432 | if (!rv) | |
4433 | return -1; | |
1da177e4 LT |
4434 | |
4435 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4436 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4437 | return tbl[i].mode; |
4438 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4439 | return tbl[i].mode; |
1da177e4 LT |
4440 | } |
4441 | ||
4442 | return -1; | |
4443 | } | |
4444 | ||
4445 | static int bond_check_params(struct bond_params *params) | |
4446 | { | |
a549952a | 4447 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4448 | |
1da177e4 LT |
4449 | /* |
4450 | * Convert string parameters. | |
4451 | */ | |
4452 | if (mode) { | |
4453 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4454 | if (bond_mode == -1) { | |
a4aee5c8 | 4455 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4456 | mode == NULL ? "NULL" : mode); |
4457 | return -EINVAL; | |
4458 | } | |
4459 | } | |
4460 | ||
169a3e66 JV |
4461 | if (xmit_hash_policy) { |
4462 | if ((bond_mode != BOND_MODE_XOR) && | |
4463 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4464 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4465 | bond_mode_name(bond_mode)); |
4466 | } else { | |
4467 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4468 | xmit_hashtype_tbl); | |
4469 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4470 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4471 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4472 | xmit_hash_policy); |
4473 | return -EINVAL; | |
4474 | } | |
4475 | } | |
4476 | } | |
4477 | ||
1da177e4 LT |
4478 | if (lacp_rate) { |
4479 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4480 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4481 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4482 | } else { |
4483 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4484 | if (lacp_fast == -1) { | |
a4aee5c8 | 4485 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4486 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4487 | return -EINVAL; | |
4488 | } | |
4489 | } | |
4490 | } | |
4491 | ||
fd989c83 JV |
4492 | if (ad_select) { |
4493 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4494 | if (params->ad_select == -1) { | |
a4aee5c8 | 4495 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4496 | ad_select == NULL ? "NULL" : ad_select); |
4497 | return -EINVAL; | |
4498 | } | |
4499 | ||
4500 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4501 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4502 | } |
4503 | } else { | |
4504 | params->ad_select = BOND_AD_STABLE; | |
4505 | } | |
4506 | ||
f5841306 | 4507 | if (max_bonds < 0) { |
a4aee5c8 JP |
4508 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4509 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4510 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4511 | } | |
4512 | ||
4513 | if (miimon < 0) { | |
a4aee5c8 JP |
4514 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
4515 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
4516 | miimon = BOND_LINK_MON_INTERV; |
4517 | } | |
4518 | ||
4519 | if (updelay < 0) { | |
a4aee5c8 JP |
4520 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4521 | updelay, INT_MAX); | |
1da177e4 LT |
4522 | updelay = 0; |
4523 | } | |
4524 | ||
4525 | if (downdelay < 0) { | |
a4aee5c8 JP |
4526 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
4527 | downdelay, INT_MAX); | |
1da177e4 LT |
4528 | downdelay = 0; |
4529 | } | |
4530 | ||
4531 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
4532 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
4533 | use_carrier); | |
1da177e4 LT |
4534 | use_carrier = 1; |
4535 | } | |
4536 | ||
ad246c99 BH |
4537 | if (num_peer_notif < 0 || num_peer_notif > 255) { |
4538 | pr_warning("Warning: num_grat_arp/num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", | |
4539 | num_peer_notif); | |
4540 | num_peer_notif = 1; | |
4541 | } | |
4542 | ||
1da177e4 LT |
4543 | /* reset values for 802.3ad */ |
4544 | if (bond_mode == BOND_MODE_8023AD) { | |
4545 | if (!miimon) { | |
a4aee5c8 | 4546 | 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 | 4547 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4548 | miimon = 100; |
4549 | } | |
4550 | } | |
4551 | ||
bb1d9123 AG |
4552 | if (tx_queues < 1 || tx_queues > 255) { |
4553 | pr_warning("Warning: tx_queues (%d) should be between " | |
4554 | "1 and 255, resetting to %d\n", | |
4555 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
4556 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
4557 | } | |
4558 | ||
ebd8e497 AG |
4559 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
4560 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
4561 | "not of valid value (0/1), so it was set to " | |
4562 | "0\n", all_slaves_active); | |
4563 | all_slaves_active = 0; | |
4564 | } | |
4565 | ||
c2952c31 FL |
4566 | if (resend_igmp < 0 || resend_igmp > 255) { |
4567 | pr_warning("Warning: resend_igmp (%d) should be between " | |
4568 | "0 and 255, resetting to %d\n", | |
4569 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
4570 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
4571 | } | |
4572 | ||
1da177e4 LT |
4573 | /* reset values for TLB/ALB */ |
4574 | if ((bond_mode == BOND_MODE_TLB) || | |
4575 | (bond_mode == BOND_MODE_ALB)) { | |
4576 | if (!miimon) { | |
a4aee5c8 | 4577 | 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 | 4578 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
4579 | miimon = 100; |
4580 | } | |
4581 | } | |
4582 | ||
4583 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
4584 | 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", |
4585 | updelay); | |
1da177e4 LT |
4586 | } |
4587 | ||
4588 | if (!miimon) { | |
4589 | if (updelay || downdelay) { | |
4590 | /* just warn the user the up/down delay will have | |
4591 | * no effect since miimon is zero... | |
4592 | */ | |
a4aee5c8 JP |
4593 | 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", |
4594 | updelay, downdelay); | |
1da177e4 LT |
4595 | } |
4596 | } else { | |
4597 | /* don't allow arp monitoring */ | |
4598 | if (arp_interval) { | |
a4aee5c8 JP |
4599 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
4600 | miimon, arp_interval); | |
1da177e4 LT |
4601 | arp_interval = 0; |
4602 | } | |
4603 | ||
4604 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
4605 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
4606 | updelay, miimon, | |
4607 | (updelay / miimon) * miimon); | |
1da177e4 LT |
4608 | } |
4609 | ||
4610 | updelay /= miimon; | |
4611 | ||
4612 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
4613 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
4614 | downdelay, miimon, | |
4615 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
4616 | } |
4617 | ||
4618 | downdelay /= miimon; | |
4619 | } | |
4620 | ||
4621 | if (arp_interval < 0) { | |
a4aee5c8 JP |
4622 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
4623 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
4624 | arp_interval = BOND_LINK_ARP_INTERV; |
4625 | } | |
4626 | ||
4627 | for (arp_ip_count = 0; | |
4628 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4629 | arp_ip_count++) { | |
4630 | /* not complete check, but should be good enough to | |
4631 | catch mistakes */ | |
4632 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
4633 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
4634 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
4635 | arp_interval = 0; |
4636 | } else { | |
d3bb52b0 | 4637 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4638 | arp_target[arp_ip_count] = ip; |
4639 | } | |
4640 | } | |
4641 | ||
4642 | if (arp_interval && !arp_ip_count) { | |
4643 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
4644 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
4645 | arp_interval); | |
1da177e4 LT |
4646 | arp_interval = 0; |
4647 | } | |
4648 | ||
f5b2b966 JV |
4649 | if (arp_validate) { |
4650 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 4651 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
4652 | return -EINVAL; |
4653 | } | |
4654 | if (!arp_interval) { | |
a4aee5c8 | 4655 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
4656 | return -EINVAL; |
4657 | } | |
4658 | ||
4659 | arp_validate_value = bond_parse_parm(arp_validate, | |
4660 | arp_validate_tbl); | |
4661 | if (arp_validate_value == -1) { | |
a4aee5c8 | 4662 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
4663 | arp_validate == NULL ? "NULL" : arp_validate); |
4664 | return -EINVAL; | |
4665 | } | |
4666 | } else | |
4667 | arp_validate_value = 0; | |
4668 | ||
1da177e4 | 4669 | if (miimon) { |
a4aee5c8 | 4670 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
4671 | } else if (arp_interval) { |
4672 | int i; | |
4673 | ||
a4aee5c8 JP |
4674 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4675 | arp_interval, | |
4676 | arp_validate_tbl[arp_validate_value].modename, | |
4677 | arp_ip_count); | |
1da177e4 LT |
4678 | |
4679 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 4680 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 4681 | |
e5e2a8fd | 4682 | pr_info("\n"); |
1da177e4 | 4683 | |
b8a9787e | 4684 | } else if (max_bonds) { |
1da177e4 LT |
4685 | /* miimon and arp_interval not set, we need one so things |
4686 | * work as expected, see bonding.txt for details | |
4687 | */ | |
b2730f4f | 4688 | 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 |
4689 | } |
4690 | ||
4691 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4692 | /* currently, using a primary only makes sense | |
4693 | * in active backup, TLB or ALB modes | |
4694 | */ | |
a4aee5c8 JP |
4695 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
4696 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
4697 | primary = NULL; |
4698 | } | |
4699 | ||
a549952a JP |
4700 | if (primary && primary_reselect) { |
4701 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
4702 | pri_reselect_tbl); | |
4703 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 4704 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
4705 | primary_reselect == |
4706 | NULL ? "NULL" : primary_reselect); | |
4707 | return -EINVAL; | |
4708 | } | |
4709 | } else { | |
4710 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
4711 | } | |
4712 | ||
3915c1e8 JV |
4713 | if (fail_over_mac) { |
4714 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4715 | fail_over_mac_tbl); | |
4716 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 4717 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
4718 | arp_validate == NULL ? "NULL" : arp_validate); |
4719 | return -EINVAL; | |
4720 | } | |
4721 | ||
4722 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 4723 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
4724 | } else { |
4725 | fail_over_mac_value = BOND_FOM_NONE; | |
4726 | } | |
dd957c57 | 4727 | |
1da177e4 LT |
4728 | /* fill params struct with the proper values */ |
4729 | params->mode = bond_mode; | |
169a3e66 | 4730 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4731 | params->miimon = miimon; |
ad246c99 | 4732 | params->num_peer_notif = num_peer_notif; |
1da177e4 | 4733 | params->arp_interval = arp_interval; |
f5b2b966 | 4734 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4735 | params->updelay = updelay; |
4736 | params->downdelay = downdelay; | |
4737 | params->use_carrier = use_carrier; | |
4738 | params->lacp_fast = lacp_fast; | |
4739 | params->primary[0] = 0; | |
a549952a | 4740 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 4741 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 4742 | params->tx_queues = tx_queues; |
ebd8e497 | 4743 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 4744 | params->resend_igmp = resend_igmp; |
655f8919 | 4745 | params->min_links = min_links; |
1da177e4 LT |
4746 | |
4747 | if (primary) { | |
4748 | strncpy(params->primary, primary, IFNAMSIZ); | |
4749 | params->primary[IFNAMSIZ - 1] = 0; | |
4750 | } | |
4751 | ||
4752 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4753 | ||
4754 | return 0; | |
4755 | } | |
4756 | ||
0daa2303 | 4757 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 4758 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 4759 | |
e8a0464c DM |
4760 | static void bond_set_lockdep_class_one(struct net_device *dev, |
4761 | struct netdev_queue *txq, | |
4762 | void *_unused) | |
c773e847 DM |
4763 | { |
4764 | lockdep_set_class(&txq->_xmit_lock, | |
4765 | &bonding_netdev_xmit_lock_key); | |
4766 | } | |
4767 | ||
4768 | static void bond_set_lockdep_class(struct net_device *dev) | |
4769 | { | |
cf508b12 DM |
4770 | lockdep_set_class(&dev->addr_list_lock, |
4771 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 4772 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
4773 | } |
4774 | ||
181470fc SH |
4775 | /* |
4776 | * Called from registration process | |
4777 | */ | |
4778 | static int bond_init(struct net_device *bond_dev) | |
4779 | { | |
4780 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 4781 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
9fe0617d | 4782 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
181470fc SH |
4783 | |
4784 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
4785 | ||
9fe0617d NH |
4786 | /* |
4787 | * Initialize locks that may be required during | |
4788 | * en/deslave operations. All of the bond_open work | |
4789 | * (of which this is part) should really be moved to | |
4790 | * a phase prior to dev_open | |
4791 | */ | |
4792 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
4793 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
4794 | ||
181470fc SH |
4795 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4796 | if (!bond->wq) | |
4797 | return -ENOMEM; | |
4798 | ||
4799 | bond_set_lockdep_class(bond_dev); | |
4800 | ||
181470fc | 4801 | bond_create_proc_entry(bond); |
ec87fd3b | 4802 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 4803 | |
6151b3d4 | 4804 | bond_prepare_sysfs_group(bond); |
22bedad3 | 4805 | |
f073c7ca TI |
4806 | bond_debug_register(bond); |
4807 | ||
22bedad3 | 4808 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
4809 | return 0; |
4810 | } | |
4811 | ||
88ead977 EB |
4812 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
4813 | { | |
4814 | if (tb[IFLA_ADDRESS]) { | |
4815 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
4816 | return -EINVAL; | |
4817 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
4818 | return -EADDRNOTAVAIL; | |
4819 | } | |
4820 | return 0; | |
4821 | } | |
4822 | ||
d5da4510 JP |
4823 | static int bond_get_tx_queues(struct net *net, struct nlattr *tb[], |
4824 | unsigned int *num_queues, | |
4825 | unsigned int *real_num_queues) | |
4826 | { | |
4827 | *num_queues = tx_queues; | |
4828 | return 0; | |
4829 | } | |
4830 | ||
88ead977 EB |
4831 | static struct rtnl_link_ops bond_link_ops __read_mostly = { |
4832 | .kind = "bond", | |
6639104b | 4833 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
4834 | .setup = bond_setup, |
4835 | .validate = bond_validate, | |
d5da4510 | 4836 | .get_tx_queues = bond_get_tx_queues, |
88ead977 EB |
4837 | }; |
4838 | ||
dfe60397 | 4839 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4840 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4841 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4842 | * set up our sysfs entries. | |
4843 | */ | |
ec87fd3b | 4844 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
4845 | { |
4846 | struct net_device *bond_dev; | |
4847 | int res; | |
4848 | ||
4849 | rtnl_lock(); | |
027ea041 | 4850 | |
1c5cae81 JP |
4851 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), |
4852 | name ? name : "bond%d", | |
4853 | bond_setup, tx_queues); | |
dfe60397 | 4854 | if (!bond_dev) { |
a4aee5c8 | 4855 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
4856 | rtnl_unlock(); |
4857 | return -ENOMEM; | |
dfe60397 MW |
4858 | } |
4859 | ||
ec87fd3b | 4860 | dev_net_set(bond_dev, net); |
88ead977 EB |
4861 | bond_dev->rtnl_link_ops = &bond_link_ops; |
4862 | ||
dfe60397 | 4863 | res = register_netdevice(bond_dev); |
0daa2303 | 4864 | |
e826eafa PO |
4865 | netif_carrier_off(bond_dev); |
4866 | ||
7e083840 | 4867 | rtnl_unlock(); |
9e2e61fb AW |
4868 | if (res < 0) |
4869 | bond_destructor(bond_dev); | |
30c15ba9 | 4870 | return res; |
dfe60397 MW |
4871 | } |
4872 | ||
2c8c1e72 | 4873 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 4874 | { |
15449745 | 4875 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
4876 | |
4877 | bn->net = net; | |
4878 | INIT_LIST_HEAD(&bn->dev_list); | |
4879 | ||
ec87fd3b | 4880 | bond_create_proc_dir(bn); |
4c22400a | 4881 | bond_create_sysfs(bn); |
15449745 EB |
4882 | |
4883 | return 0; | |
ec87fd3b EB |
4884 | } |
4885 | ||
2c8c1e72 | 4886 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 4887 | { |
15449745 | 4888 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b | 4889 | |
4c22400a | 4890 | bond_destroy_sysfs(bn); |
ec87fd3b | 4891 | bond_destroy_proc_dir(bn); |
ec87fd3b EB |
4892 | } |
4893 | ||
4894 | static struct pernet_operations bond_net_ops = { | |
4895 | .init = bond_net_init, | |
4896 | .exit = bond_net_exit, | |
15449745 EB |
4897 | .id = &bond_net_id, |
4898 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
4899 | }; |
4900 | ||
1da177e4 LT |
4901 | static int __init bonding_init(void) |
4902 | { | |
1da177e4 LT |
4903 | int i; |
4904 | int res; | |
4905 | ||
bd33acc3 | 4906 | pr_info("%s", bond_version); |
1da177e4 | 4907 | |
dfe60397 | 4908 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 4909 | if (res) |
dfe60397 | 4910 | goto out; |
1da177e4 | 4911 | |
15449745 | 4912 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
4913 | if (res) |
4914 | goto out; | |
027ea041 | 4915 | |
88ead977 EB |
4916 | res = rtnl_link_register(&bond_link_ops); |
4917 | if (res) | |
6639104b | 4918 | goto err_link; |
88ead977 | 4919 | |
f073c7ca TI |
4920 | bond_create_debugfs(); |
4921 | ||
1da177e4 | 4922 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 4923 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
4924 | if (res) |
4925 | goto err; | |
1da177e4 LT |
4926 | } |
4927 | ||
1da177e4 | 4928 | register_netdevice_notifier(&bond_netdev_notifier); |
dfe60397 | 4929 | out: |
1da177e4 | 4930 | return res; |
88ead977 EB |
4931 | err: |
4932 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 4933 | err_link: |
15449745 | 4934 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 4935 | goto out; |
dfe60397 | 4936 | |
1da177e4 LT |
4937 | } |
4938 | ||
4939 | static void __exit bonding_exit(void) | |
4940 | { | |
4941 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
4942 | ||
f073c7ca | 4943 | bond_destroy_debugfs(); |
ae68c398 | 4944 | |
88ead977 | 4945 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 4946 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
4947 | |
4948 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
4949 | /* |
4950 | * Make sure we don't have an imbalance on our netpoll blocking | |
4951 | */ | |
4952 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 4953 | #endif |
1da177e4 LT |
4954 | } |
4955 | ||
4956 | module_init(bonding_init); | |
4957 | module_exit(bonding_exit); | |
4958 | MODULE_LICENSE("GPL"); | |
4959 | MODULE_VERSION(DRV_VERSION); | |
4960 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4961 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 4962 | MODULE_ALIAS_RTNL_LINK("bond"); |