]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
a4aee5c8 JP |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
3d632c3f | 56 | #include <linux/io.h> |
1da177e4 | 57 | #include <asm/system.h> |
1da177e4 | 58 | #include <asm/dma.h> |
3d632c3f | 59 | #include <linux/uaccess.h> |
1da177e4 LT |
60 | #include <linux/errno.h> |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/inetdevice.h> | |
a816c7c7 | 63 | #include <linux/igmp.h> |
1da177e4 LT |
64 | #include <linux/etherdevice.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
67 | #include <linux/rtnetlink.h> | |
68 | #include <linux/proc_fs.h> | |
69 | #include <linux/seq_file.h> | |
70 | #include <linux/smp.h> | |
71 | #include <linux/if_ether.h> | |
72 | #include <net/arp.h> | |
73 | #include <linux/mii.h> | |
74 | #include <linux/ethtool.h> | |
75 | #include <linux/if_vlan.h> | |
76 | #include <linux/if_bonding.h> | |
b63bb739 | 77 | #include <linux/jiffies.h> |
e843fa50 | 78 | #include <linux/preempt.h> |
c3ade5ca | 79 | #include <net/route.h> |
457c4cbc | 80 | #include <net/net_namespace.h> |
ec87fd3b | 81 | #include <net/netns/generic.h> |
1da177e4 LT |
82 | #include "bonding.h" |
83 | #include "bond_3ad.h" | |
84 | #include "bond_alb.h" | |
85 | ||
86 | /*---------------------------- Module parameters ----------------------------*/ | |
87 | ||
88 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
89 | #define BOND_LINK_MON_INTERV 0 | |
90 | #define BOND_LINK_ARP_INTERV 0 | |
91 | ||
92 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
bb1d9123 | 93 | static int tx_queues = BOND_DEFAULT_TX_QUEUES; |
7893b249 | 94 | static int num_grat_arp = 1; |
305d552a | 95 | static int num_unsol_na = 1; |
1da177e4 | 96 | static int miimon = BOND_LINK_MON_INTERV; |
3d632c3f SH |
97 | static int updelay; |
98 | static int downdelay; | |
1da177e4 | 99 | static int use_carrier = 1; |
3d632c3f SH |
100 | static char *mode; |
101 | static char *primary; | |
a549952a | 102 | static char *primary_reselect; |
3d632c3f SH |
103 | static char *lacp_rate; |
104 | static char *ad_select; | |
105 | static char *xmit_hash_policy; | |
1da177e4 | 106 | static int arp_interval = BOND_LINK_ARP_INTERV; |
3d632c3f SH |
107 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS]; |
108 | static char *arp_validate; | |
109 | static char *fail_over_mac; | |
ebd8e497 | 110 | static int all_slaves_active = 0; |
d2991f75 | 111 | static struct bond_params bonding_defaults; |
c2952c31 | 112 | static int resend_igmp = BOND_DEFAULT_RESEND_IGMP; |
1da177e4 LT |
113 | |
114 | module_param(max_bonds, int, 0); | |
115 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
bb1d9123 AG |
116 | module_param(tx_queues, int, 0); |
117 | MODULE_PARM_DESC(tx_queues, "Max number of transmit queues (default = 16)"); | |
7893b249 MS |
118 | module_param(num_grat_arp, int, 0644); |
119 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
305d552a BH |
120 | module_param(num_unsol_na, int, 0644); |
121 | MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event"); | |
1da177e4 LT |
122 | module_param(miimon, int, 0); |
123 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
124 | module_param(updelay, int, 0); | |
125 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
126 | module_param(downdelay, int, 0); | |
2ac47660 MW |
127 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
128 | "in milliseconds"); | |
1da177e4 | 129 | module_param(use_carrier, int, 0); |
2ac47660 MW |
130 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
131 | "0 for off, 1 for on (default)"); | |
1da177e4 | 132 | module_param(mode, charp, 0); |
2ac47660 MW |
133 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
134 | "1 for active-backup, 2 for balance-xor, " | |
135 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
136 | "6 for balance-alb"); | |
1da177e4 LT |
137 | module_param(primary, charp, 0); |
138 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
a549952a JP |
139 | module_param(primary_reselect, charp, 0); |
140 | MODULE_PARM_DESC(primary_reselect, "Reselect primary slave " | |
141 | "once it comes up; " | |
142 | "0 for always (default), " | |
143 | "1 for only if speed of primary is " | |
144 | "better, " | |
145 | "2 for only on active slave " | |
146 | "failure"); | |
1da177e4 | 147 | module_param(lacp_rate, charp, 0); |
2ac47660 MW |
148 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
149 | "(slow/fast)"); | |
fd989c83 JV |
150 | module_param(ad_select, charp, 0); |
151 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 152 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
153 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
154 | ", 1 for layer 3+4"); | |
1da177e4 LT |
155 | module_param(arp_interval, int, 0); |
156 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
157 | module_param_array(arp_ip_target, charp, NULL, 0); | |
158 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
159 | module_param(arp_validate, charp, 0); |
160 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
161 | module_param(fail_over_mac, charp, 0); |
162 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
ebd8e497 AG |
163 | module_param(all_slaves_active, int, 0); |
164 | MODULE_PARM_DESC(all_slaves_active, "Keep all frames received on an interface" | |
165 | "by setting active flag for all slaves. " | |
166 | "0 for never (default), 1 for always."); | |
c2952c31 FL |
167 | module_param(resend_igmp, int, 0); |
168 | MODULE_PARM_DESC(resend_igmp, "Number of IGMP membership reports to send on link failure"); | |
1da177e4 LT |
169 | |
170 | /*----------------------------- Global variables ----------------------------*/ | |
171 | ||
e843fa50 | 172 | #ifdef CONFIG_NET_POLL_CONTROLLER |
fb4fa76a | 173 | atomic_t netpoll_block_tx = ATOMIC_INIT(0); |
e843fa50 NH |
174 | #endif |
175 | ||
f71e1309 | 176 | static const char * const version = |
1da177e4 LT |
177 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
178 | ||
f99189b1 | 179 | int bond_net_id __read_mostly; |
1da177e4 | 180 | |
3d632c3f SH |
181 | static __be32 arp_target[BOND_MAX_ARP_TARGETS]; |
182 | static int arp_ip_count; | |
1da177e4 | 183 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
3d632c3f SH |
184 | static int xmit_hashtype = BOND_XMIT_POLICY_LAYER2; |
185 | static int lacp_fast; | |
1da177e4 | 186 | |
e97fd7c6 | 187 | const struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
188 | { "slow", AD_LACP_SLOW}, |
189 | { "fast", AD_LACP_FAST}, | |
190 | { NULL, -1}, | |
191 | }; | |
192 | ||
e97fd7c6 | 193 | const struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
194 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
195 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
196 | { "balance-xor", BOND_MODE_XOR}, | |
197 | { "broadcast", BOND_MODE_BROADCAST}, | |
198 | { "802.3ad", BOND_MODE_8023AD}, | |
199 | { "balance-tlb", BOND_MODE_TLB}, | |
200 | { "balance-alb", BOND_MODE_ALB}, | |
201 | { NULL, -1}, | |
202 | }; | |
203 | ||
e97fd7c6 | 204 | const struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
205 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
206 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 207 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
208 | { NULL, -1}, |
209 | }; | |
210 | ||
e97fd7c6 | 211 | const struct bond_parm_tbl arp_validate_tbl[] = { |
f5b2b966 JV |
212 | { "none", BOND_ARP_VALIDATE_NONE}, |
213 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
214 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
215 | { "all", BOND_ARP_VALIDATE_ALL}, | |
216 | { NULL, -1}, | |
217 | }; | |
218 | ||
e97fd7c6 | 219 | const struct bond_parm_tbl fail_over_mac_tbl[] = { |
3915c1e8 JV |
220 | { "none", BOND_FOM_NONE}, |
221 | { "active", BOND_FOM_ACTIVE}, | |
222 | { "follow", BOND_FOM_FOLLOW}, | |
223 | { NULL, -1}, | |
224 | }; | |
225 | ||
a549952a JP |
226 | const struct bond_parm_tbl pri_reselect_tbl[] = { |
227 | { "always", BOND_PRI_RESELECT_ALWAYS}, | |
228 | { "better", BOND_PRI_RESELECT_BETTER}, | |
229 | { "failure", BOND_PRI_RESELECT_FAILURE}, | |
230 | { NULL, -1}, | |
231 | }; | |
232 | ||
fd989c83 JV |
233 | struct bond_parm_tbl ad_select_tbl[] = { |
234 | { "stable", BOND_AD_STABLE}, | |
235 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
236 | { "count", BOND_AD_COUNT}, | |
237 | { NULL, -1}, | |
238 | }; | |
239 | ||
1da177e4 LT |
240 | /*-------------------------- Forward declarations ---------------------------*/ |
241 | ||
c3ade5ca | 242 | static void bond_send_gratuitous_arp(struct bonding *bond); |
181470fc | 243 | static int bond_init(struct net_device *bond_dev); |
c67dfb29 | 244 | static void bond_uninit(struct net_device *bond_dev); |
1da177e4 LT |
245 | |
246 | /*---------------------------- General routines -----------------------------*/ | |
247 | ||
4ad072c9 | 248 | static const char *bond_mode_name(int mode) |
1da177e4 | 249 | { |
77afc92b HE |
250 | static const char *names[] = { |
251 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
252 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
253 | [BOND_MODE_XOR] = "load balancing (xor)", | |
254 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
3d632c3f | 255 | [BOND_MODE_8023AD] = "IEEE 802.3ad Dynamic link aggregation", |
77afc92b HE |
256 | [BOND_MODE_TLB] = "transmit load balancing", |
257 | [BOND_MODE_ALB] = "adaptive load balancing", | |
258 | }; | |
259 | ||
260 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 261 | return "unknown"; |
77afc92b HE |
262 | |
263 | return names[mode]; | |
1da177e4 LT |
264 | } |
265 | ||
266 | /*---------------------------------- VLAN -----------------------------------*/ | |
267 | ||
268 | /** | |
269 | * bond_add_vlan - add a new vlan id on bond | |
270 | * @bond: bond that got the notification | |
271 | * @vlan_id: the vlan id to add | |
272 | * | |
273 | * Returns -ENOMEM if allocation failed. | |
274 | */ | |
275 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
276 | { | |
277 | struct vlan_entry *vlan; | |
278 | ||
5a03cdb7 | 279 | pr_debug("bond: %s, vlan id %d\n", |
a4aee5c8 | 280 | (bond ? bond->dev->name : "None"), vlan_id); |
1da177e4 | 281 | |
305d552a | 282 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
3d632c3f | 283 | if (!vlan) |
1da177e4 | 284 | return -ENOMEM; |
1da177e4 LT |
285 | |
286 | INIT_LIST_HEAD(&vlan->vlan_list); | |
287 | vlan->vlan_id = vlan_id; | |
288 | ||
289 | write_lock_bh(&bond->lock); | |
290 | ||
291 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
292 | ||
293 | write_unlock_bh(&bond->lock); | |
294 | ||
5a03cdb7 | 295 | pr_debug("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); |
1da177e4 LT |
296 | |
297 | return 0; | |
298 | } | |
299 | ||
300 | /** | |
301 | * bond_del_vlan - delete a vlan id from bond | |
302 | * @bond: bond that got the notification | |
303 | * @vlan_id: the vlan id to delete | |
304 | * | |
305 | * returns -ENODEV if @vlan_id was not found in @bond. | |
306 | */ | |
307 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
308 | { | |
0883beca | 309 | struct vlan_entry *vlan; |
1da177e4 LT |
310 | int res = -ENODEV; |
311 | ||
5a03cdb7 | 312 | pr_debug("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); |
1da177e4 | 313 | |
e843fa50 | 314 | block_netpoll_tx(); |
1da177e4 LT |
315 | write_lock_bh(&bond->lock); |
316 | ||
0883beca | 317 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
318 | if (vlan->vlan_id == vlan_id) { |
319 | list_del(&vlan->vlan_list); | |
320 | ||
58402054 | 321 | if (bond_is_lb(bond)) |
1da177e4 | 322 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 | 323 | |
a4aee5c8 JP |
324 | pr_debug("removed VLAN ID %d from bond %s\n", |
325 | vlan_id, bond->dev->name); | |
1da177e4 LT |
326 | |
327 | kfree(vlan); | |
328 | ||
329 | if (list_empty(&bond->vlan_list) && | |
330 | (bond->slave_cnt == 0)) { | |
331 | /* Last VLAN removed and no slaves, so | |
332 | * restore block on adding VLANs. This will | |
333 | * be removed once new slaves that are not | |
334 | * VLAN challenged will be added. | |
335 | */ | |
336 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
337 | } | |
338 | ||
339 | res = 0; | |
340 | goto out; | |
341 | } | |
342 | } | |
343 | ||
a4aee5c8 JP |
344 | pr_debug("couldn't find VLAN ID %d in bond %s\n", |
345 | vlan_id, bond->dev->name); | |
1da177e4 LT |
346 | |
347 | out: | |
348 | write_unlock_bh(&bond->lock); | |
e843fa50 | 349 | unblock_netpoll_tx(); |
1da177e4 LT |
350 | return res; |
351 | } | |
352 | ||
353 | /** | |
354 | * bond_has_challenged_slaves | |
355 | * @bond: the bond we're working on | |
356 | * | |
357 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
358 | * was found, 0 otherwise. | |
359 | * | |
360 | * Assumes bond->lock is held. | |
361 | */ | |
362 | static int bond_has_challenged_slaves(struct bonding *bond) | |
363 | { | |
364 | struct slave *slave; | |
365 | int i; | |
366 | ||
367 | bond_for_each_slave(bond, slave, i) { | |
368 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 369 | pr_debug("found VLAN challenged slave - %s\n", |
a4aee5c8 | 370 | slave->dev->name); |
1da177e4 LT |
371 | return 1; |
372 | } | |
373 | } | |
374 | ||
5a03cdb7 | 375 | pr_debug("no VLAN challenged slaves found\n"); |
1da177e4 LT |
376 | return 0; |
377 | } | |
378 | ||
379 | /** | |
380 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
381 | * @bond: the bond we're working on | |
382 | * @curr: item we're advancing from | |
383 | * | |
384 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
385 | * or @curr->next otherwise (even if it is @curr itself again). | |
3d632c3f | 386 | * |
1da177e4 LT |
387 | * Caller must hold bond->lock |
388 | */ | |
389 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
390 | { | |
391 | struct vlan_entry *next, *last; | |
392 | ||
3d632c3f | 393 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 394 | return NULL; |
1da177e4 LT |
395 | |
396 | if (!curr) { | |
397 | next = list_entry(bond->vlan_list.next, | |
398 | struct vlan_entry, vlan_list); | |
399 | } else { | |
400 | last = list_entry(bond->vlan_list.prev, | |
401 | struct vlan_entry, vlan_list); | |
402 | if (last == curr) { | |
403 | next = list_entry(bond->vlan_list.next, | |
404 | struct vlan_entry, vlan_list); | |
405 | } else { | |
406 | next = list_entry(curr->vlan_list.next, | |
407 | struct vlan_entry, vlan_list); | |
408 | } | |
409 | } | |
410 | ||
411 | return next; | |
412 | } | |
413 | ||
414 | /** | |
415 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
3d632c3f | 416 | * |
1da177e4 LT |
417 | * @bond: bond device that got this skb for tx. |
418 | * @skb: hw accel VLAN tagged skb to transmit | |
419 | * @slave_dev: slave that is supposed to xmit this skbuff | |
1da177e4 | 420 | */ |
3d632c3f SH |
421 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, |
422 | struct net_device *slave_dev) | |
1da177e4 | 423 | { |
8387451e | 424 | skb->dev = slave_dev; |
1da177e4 | 425 | skb->priority = 1; |
080e4130 | 426 | if (unlikely(netpoll_tx_running(slave_dev))) |
8a8efa22 | 427 | bond_netpoll_send_skb(bond_get_slave_by_dev(bond, slave_dev), skb); |
080e4130 | 428 | else |
f6dc31a8 | 429 | dev_queue_xmit(skb); |
1da177e4 LT |
430 | |
431 | return 0; | |
432 | } | |
433 | ||
434 | /* | |
435 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
436 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
437 | * lock because: | |
438 | * a. This operation is performed in IOCTL context, | |
439 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
440 | * c. Holding a lock with BH disabled while directly calling a base driver | |
441 | * entry point is generally a BAD idea. | |
3d632c3f | 442 | * |
1da177e4 LT |
443 | * The design of synchronization/protection for this operation in the 8021q |
444 | * module is good for one or more VLAN devices over a single physical device | |
445 | * and cannot be extended for a teaming solution like bonding, so there is a | |
446 | * potential race condition here where a net device from the vlan group might | |
447 | * be referenced (either by a base driver or the 8021q code) while it is being | |
448 | * removed from the system. However, it turns out we're not making matters | |
449 | * worse, and if it works for regular VLAN usage it will work here too. | |
450 | */ | |
451 | ||
452 | /** | |
453 | * bond_vlan_rx_register - Propagates registration to slaves | |
454 | * @bond_dev: bonding net device that got called | |
455 | * @grp: vlan group being registered | |
456 | */ | |
3d632c3f SH |
457 | static void bond_vlan_rx_register(struct net_device *bond_dev, |
458 | struct vlan_group *grp) | |
1da177e4 | 459 | { |
454d7c9b | 460 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
461 | struct slave *slave; |
462 | int i; | |
463 | ||
a71fb881 | 464 | write_lock_bh(&bond->lock); |
1da177e4 | 465 | bond->vlgrp = grp; |
a71fb881 | 466 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
467 | |
468 | bond_for_each_slave(bond, slave, i) { | |
469 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 470 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
471 | |
472 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
473 | slave_ops->ndo_vlan_rx_register) { |
474 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
475 | } |
476 | } | |
477 | } | |
478 | ||
479 | /** | |
480 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
481 | * @bond_dev: bonding net device that got called | |
482 | * @vid: vlan id being added | |
483 | */ | |
484 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
485 | { | |
454d7c9b | 486 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
487 | struct slave *slave; |
488 | int i, res; | |
489 | ||
490 | bond_for_each_slave(bond, slave, i) { | |
491 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 492 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
493 | |
494 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
495 | slave_ops->ndo_vlan_rx_add_vid) { |
496 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
497 | } |
498 | } | |
499 | ||
500 | res = bond_add_vlan(bond, vid); | |
501 | if (res) { | |
a4aee5c8 | 502 | pr_err("%s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
503 | bond_dev->name, vid); |
504 | } | |
505 | } | |
506 | ||
507 | /** | |
508 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
509 | * @bond_dev: bonding net device that got called | |
510 | * @vid: vlan id being removed | |
511 | */ | |
512 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
513 | { | |
454d7c9b | 514 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
515 | struct slave *slave; |
516 | struct net_device *vlan_dev; | |
517 | int i, res; | |
518 | ||
519 | bond_for_each_slave(bond, slave, i) { | |
520 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 521 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
522 | |
523 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 524 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
525 | /* Save and then restore vlan_dev in the grp array, |
526 | * since the slave's driver might clear it. | |
527 | */ | |
5c15bdec | 528 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 529 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 530 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
531 | } |
532 | } | |
533 | ||
534 | res = bond_del_vlan(bond, vid); | |
535 | if (res) { | |
a4aee5c8 | 536 | pr_err("%s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
537 | bond_dev->name, vid); |
538 | } | |
539 | } | |
540 | ||
541 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
542 | { | |
543 | struct vlan_entry *vlan; | |
eb7cc59a | 544 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 545 | |
f35188fa | 546 | if (!bond->vlgrp) |
03dc2f4c | 547 | return; |
1da177e4 LT |
548 | |
549 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
550 | slave_ops->ndo_vlan_rx_register) |
551 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
552 | |
553 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 554 | !(slave_ops->ndo_vlan_rx_add_vid)) |
03dc2f4c | 555 | return; |
1da177e4 | 556 | |
eb7cc59a SH |
557 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
558 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
559 | } |
560 | ||
3d632c3f SH |
561 | static void bond_del_vlans_from_slave(struct bonding *bond, |
562 | struct net_device *slave_dev) | |
1da177e4 | 563 | { |
eb7cc59a | 564 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
565 | struct vlan_entry *vlan; |
566 | struct net_device *vlan_dev; | |
567 | ||
f35188fa | 568 | if (!bond->vlgrp) |
03dc2f4c | 569 | return; |
1da177e4 LT |
570 | |
571 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 572 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 573 | goto unreg; |
1da177e4 LT |
574 | |
575 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
f35188fa JV |
576 | if (!vlan->vlan_id) |
577 | continue; | |
1da177e4 LT |
578 | /* Save and then restore vlan_dev in the grp array, |
579 | * since the slave's driver might clear it. | |
580 | */ | |
5c15bdec | 581 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 582 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 583 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
584 | } |
585 | ||
586 | unreg: | |
587 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
588 | slave_ops->ndo_vlan_rx_register) |
589 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
590 | } |
591 | ||
592 | /*------------------------------- Link status -------------------------------*/ | |
593 | ||
ff59c456 JV |
594 | /* |
595 | * Set the carrier state for the master according to the state of its | |
596 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
597 | * do special 802.3ad magic. | |
598 | * | |
599 | * Returns zero if carrier state does not change, nonzero if it does. | |
600 | */ | |
601 | static int bond_set_carrier(struct bonding *bond) | |
602 | { | |
603 | struct slave *slave; | |
604 | int i; | |
605 | ||
606 | if (bond->slave_cnt == 0) | |
607 | goto down; | |
608 | ||
609 | if (bond->params.mode == BOND_MODE_8023AD) | |
610 | return bond_3ad_set_carrier(bond); | |
611 | ||
612 | bond_for_each_slave(bond, slave, i) { | |
613 | if (slave->link == BOND_LINK_UP) { | |
614 | if (!netif_carrier_ok(bond->dev)) { | |
615 | netif_carrier_on(bond->dev); | |
616 | return 1; | |
617 | } | |
618 | return 0; | |
619 | } | |
620 | } | |
621 | ||
622 | down: | |
623 | if (netif_carrier_ok(bond->dev)) { | |
624 | netif_carrier_off(bond->dev); | |
625 | return 1; | |
626 | } | |
627 | return 0; | |
628 | } | |
629 | ||
1da177e4 LT |
630 | /* |
631 | * Get link speed and duplex from the slave's base driver | |
632 | * using ethtool. If for some reason the call fails or the | |
633 | * values are invalid, fake speed and duplex to 100/Full | |
634 | * and return error. | |
635 | */ | |
636 | static int bond_update_speed_duplex(struct slave *slave) | |
637 | { | |
638 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 639 | struct ethtool_cmd etool; |
61a44b9c | 640 | int res; |
1da177e4 LT |
641 | |
642 | /* Fake speed and duplex */ | |
643 | slave->speed = SPEED_100; | |
644 | slave->duplex = DUPLEX_FULL; | |
645 | ||
61a44b9c MW |
646 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
647 | return -1; | |
1da177e4 | 648 | |
61a44b9c MW |
649 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
650 | if (res < 0) | |
1da177e4 | 651 | return -1; |
1da177e4 | 652 | |
1da177e4 LT |
653 | switch (etool.speed) { |
654 | case SPEED_10: | |
655 | case SPEED_100: | |
656 | case SPEED_1000: | |
94dbffd5 | 657 | case SPEED_10000: |
1da177e4 LT |
658 | break; |
659 | default: | |
660 | return -1; | |
661 | } | |
662 | ||
663 | switch (etool.duplex) { | |
664 | case DUPLEX_FULL: | |
665 | case DUPLEX_HALF: | |
666 | break; | |
667 | default: | |
668 | return -1; | |
669 | } | |
670 | ||
671 | slave->speed = etool.speed; | |
672 | slave->duplex = etool.duplex; | |
673 | ||
674 | return 0; | |
675 | } | |
676 | ||
677 | /* | |
678 | * if <dev> supports MII link status reporting, check its link status. | |
679 | * | |
680 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
3d632c3f | 681 | * depending upon the setting of the use_carrier parameter. |
1da177e4 LT |
682 | * |
683 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
684 | * can't tell and just pretend it is), or 0, meaning that the link is | |
685 | * down. | |
686 | * | |
687 | * If reporting is non-zero, instead of faking link up, return -1 if | |
688 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
689 | * support them). If use_carrier is set, return whatever it says. | |
690 | * It'd be nice if there was a good way to tell if a driver supports | |
691 | * netif_carrier, but there really isn't. | |
692 | */ | |
3d632c3f SH |
693 | static int bond_check_dev_link(struct bonding *bond, |
694 | struct net_device *slave_dev, int reporting) | |
1da177e4 | 695 | { |
eb7cc59a | 696 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
d9d52832 | 697 | int (*ioctl)(struct net_device *, struct ifreq *, int); |
1da177e4 LT |
698 | struct ifreq ifr; |
699 | struct mii_ioctl_data *mii; | |
1da177e4 | 700 | |
6c988853 PG |
701 | if (!reporting && !netif_running(slave_dev)) |
702 | return 0; | |
703 | ||
eb7cc59a | 704 | if (bond->params.use_carrier) |
1da177e4 | 705 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 706 | |
29112f4e JP |
707 | /* Try to get link status using Ethtool first. */ |
708 | if (slave_dev->ethtool_ops) { | |
709 | if (slave_dev->ethtool_ops->get_link) { | |
710 | u32 link; | |
711 | ||
712 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
713 | ||
714 | return link ? BMSR_LSTATUS : 0; | |
715 | } | |
716 | } | |
717 | ||
3d632c3f | 718 | /* Ethtool can't be used, fallback to MII ioctls. */ |
eb7cc59a | 719 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
720 | if (ioctl) { |
721 | /* TODO: set pointer to correct ioctl on a per team member */ | |
722 | /* bases to make this more efficient. that is, once */ | |
723 | /* we determine the correct ioctl, we will always */ | |
724 | /* call it and not the others for that team */ | |
725 | /* member. */ | |
726 | ||
727 | /* | |
728 | * We cannot assume that SIOCGMIIPHY will also read a | |
729 | * register; not all network drivers (e.g., e100) | |
730 | * support that. | |
731 | */ | |
732 | ||
733 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
734 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
735 | mii = if_mii(&ifr); | |
736 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
737 | mii->reg_num = MII_BMSR; | |
3d632c3f SH |
738 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) |
739 | return mii->val_out & BMSR_LSTATUS; | |
1da177e4 LT |
740 | } |
741 | } | |
742 | ||
1da177e4 LT |
743 | /* |
744 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 745 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
746 | * cannot report link status). If not reporting, pretend |
747 | * we're ok. | |
748 | */ | |
3d632c3f | 749 | return reporting ? -1 : BMSR_LSTATUS; |
1da177e4 LT |
750 | } |
751 | ||
752 | /*----------------------------- Multicast list ------------------------------*/ | |
753 | ||
1da177e4 LT |
754 | /* |
755 | * Push the promiscuity flag down to appropriate slaves | |
756 | */ | |
7e1a1ac1 | 757 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 758 | { |
7e1a1ac1 | 759 | int err = 0; |
1da177e4 LT |
760 | if (USES_PRIMARY(bond->params.mode)) { |
761 | /* write lock already acquired */ | |
762 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
763 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
764 | inc); | |
1da177e4 LT |
765 | } |
766 | } else { | |
767 | struct slave *slave; | |
768 | int i; | |
769 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
770 | err = dev_set_promiscuity(slave->dev, inc); |
771 | if (err) | |
772 | return err; | |
1da177e4 LT |
773 | } |
774 | } | |
7e1a1ac1 | 775 | return err; |
1da177e4 LT |
776 | } |
777 | ||
778 | /* | |
779 | * Push the allmulti flag down to all slaves | |
780 | */ | |
7e1a1ac1 | 781 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 782 | { |
7e1a1ac1 | 783 | int err = 0; |
1da177e4 LT |
784 | if (USES_PRIMARY(bond->params.mode)) { |
785 | /* write lock already acquired */ | |
786 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
787 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
788 | inc); | |
1da177e4 LT |
789 | } |
790 | } else { | |
791 | struct slave *slave; | |
792 | int i; | |
793 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
794 | err = dev_set_allmulti(slave->dev, inc); |
795 | if (err) | |
796 | return err; | |
1da177e4 LT |
797 | } |
798 | } | |
7e1a1ac1 | 799 | return err; |
1da177e4 LT |
800 | } |
801 | ||
802 | /* | |
803 | * Add a Multicast address to slaves | |
804 | * according to mode | |
805 | */ | |
22bedad3 | 806 | static void bond_mc_add(struct bonding *bond, void *addr) |
1da177e4 LT |
807 | { |
808 | if (USES_PRIMARY(bond->params.mode)) { | |
809 | /* write lock already acquired */ | |
3d632c3f | 810 | if (bond->curr_active_slave) |
22bedad3 | 811 | dev_mc_add(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
812 | } else { |
813 | struct slave *slave; | |
814 | int i; | |
3d632c3f SH |
815 | |
816 | bond_for_each_slave(bond, slave, i) | |
22bedad3 | 817 | dev_mc_add(slave->dev, addr); |
1da177e4 LT |
818 | } |
819 | } | |
820 | ||
821 | /* | |
822 | * Remove a multicast address from slave | |
823 | * according to mode | |
824 | */ | |
22bedad3 | 825 | static void bond_mc_del(struct bonding *bond, void *addr) |
1da177e4 LT |
826 | { |
827 | if (USES_PRIMARY(bond->params.mode)) { | |
828 | /* write lock already acquired */ | |
3d632c3f | 829 | if (bond->curr_active_slave) |
22bedad3 | 830 | dev_mc_del(bond->curr_active_slave->dev, addr); |
1da177e4 LT |
831 | } else { |
832 | struct slave *slave; | |
833 | int i; | |
834 | bond_for_each_slave(bond, slave, i) { | |
22bedad3 | 835 | dev_mc_del(slave->dev, addr); |
1da177e4 LT |
836 | } |
837 | } | |
838 | } | |
839 | ||
a816c7c7 | 840 | |
5a37e8ca | 841 | static void __bond_resend_igmp_join_requests(struct net_device *dev) |
a816c7c7 JV |
842 | { |
843 | struct in_device *in_dev; | |
a816c7c7 JV |
844 | |
845 | rcu_read_lock(); | |
5a37e8ca | 846 | in_dev = __in_dev_get_rcu(dev); |
866f3b25 | 847 | if (in_dev) |
24912420 | 848 | ip_mc_rejoin_groups(in_dev); |
a816c7c7 JV |
849 | rcu_read_unlock(); |
850 | } | |
851 | ||
5a37e8ca FL |
852 | /* |
853 | * Retrieve the list of registered multicast addresses for the bonding | |
854 | * device and retransmit an IGMP JOIN request to the current active | |
855 | * slave. | |
856 | */ | |
857 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
858 | { | |
859 | struct net_device *vlan_dev; | |
860 | struct vlan_entry *vlan; | |
861 | ||
862 | read_lock(&bond->lock); | |
863 | ||
864 | /* rejoin all groups on bond device */ | |
865 | __bond_resend_igmp_join_requests(bond->dev); | |
866 | ||
867 | /* rejoin all groups on vlan devices */ | |
868 | if (bond->vlgrp) { | |
869 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
870 | vlan_dev = vlan_group_get_device(bond->vlgrp, | |
871 | vlan->vlan_id); | |
872 | if (vlan_dev) | |
873 | __bond_resend_igmp_join_requests(vlan_dev); | |
874 | } | |
875 | } | |
876 | ||
c2952c31 FL |
877 | if (--bond->igmp_retrans > 0) |
878 | queue_delayed_work(bond->wq, &bond->mcast_work, HZ/5); | |
879 | ||
5a37e8ca FL |
880 | read_unlock(&bond->lock); |
881 | } | |
882 | ||
379b7383 | 883 | static void bond_resend_igmp_join_requests_delayed(struct work_struct *work) |
5a37e8ca FL |
884 | { |
885 | struct bonding *bond = container_of(work, struct bonding, | |
886 | mcast_work.work); | |
887 | bond_resend_igmp_join_requests(bond); | |
888 | } | |
889 | ||
1da177e4 LT |
890 | /* |
891 | * flush all members of flush->mc_list from device dev->mc_list | |
892 | */ | |
3d632c3f SH |
893 | static void bond_mc_list_flush(struct net_device *bond_dev, |
894 | struct net_device *slave_dev) | |
1da177e4 | 895 | { |
454d7c9b | 896 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 | 897 | struct netdev_hw_addr *ha; |
1da177e4 | 898 | |
22bedad3 JP |
899 | netdev_for_each_mc_addr(ha, bond_dev) |
900 | dev_mc_del(slave_dev, ha->addr); | |
1da177e4 LT |
901 | |
902 | if (bond->params.mode == BOND_MODE_8023AD) { | |
903 | /* del lacpdu mc addr from mc list */ | |
904 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
905 | ||
22bedad3 | 906 | dev_mc_del(slave_dev, lacpdu_multicast); |
1da177e4 LT |
907 | } |
908 | } | |
909 | ||
910 | /*--------------------------- Active slave change ---------------------------*/ | |
911 | ||
912 | /* | |
913 | * Update the mc list and multicast-related flags for the new and | |
914 | * old active slaves (if any) according to the multicast mode, and | |
915 | * promiscuous flags unconditionally. | |
916 | */ | |
3d632c3f SH |
917 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, |
918 | struct slave *old_active) | |
1da177e4 | 919 | { |
22bedad3 | 920 | struct netdev_hw_addr *ha; |
1da177e4 | 921 | |
3d632c3f | 922 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 LT |
923 | /* nothing to do - mc list is already up-to-date on |
924 | * all slaves | |
925 | */ | |
926 | return; | |
1da177e4 LT |
927 | |
928 | if (old_active) { | |
3d632c3f | 929 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 930 | dev_set_promiscuity(old_active->dev, -1); |
1da177e4 | 931 | |
3d632c3f | 932 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 933 | dev_set_allmulti(old_active->dev, -1); |
1da177e4 | 934 | |
22bedad3 JP |
935 | netdev_for_each_mc_addr(ha, bond->dev) |
936 | dev_mc_del(old_active->dev, ha->addr); | |
1da177e4 LT |
937 | } |
938 | ||
939 | if (new_active) { | |
7e1a1ac1 | 940 | /* FIXME: Signal errors upstream. */ |
3d632c3f | 941 | if (bond->dev->flags & IFF_PROMISC) |
1da177e4 | 942 | dev_set_promiscuity(new_active->dev, 1); |
1da177e4 | 943 | |
3d632c3f | 944 | if (bond->dev->flags & IFF_ALLMULTI) |
1da177e4 | 945 | dev_set_allmulti(new_active->dev, 1); |
1da177e4 | 946 | |
22bedad3 JP |
947 | netdev_for_each_mc_addr(ha, bond->dev) |
948 | dev_mc_add(new_active->dev, ha->addr); | |
1da177e4 LT |
949 | } |
950 | } | |
951 | ||
3915c1e8 JV |
952 | /* |
953 | * bond_do_fail_over_mac | |
954 | * | |
955 | * Perform special MAC address swapping for fail_over_mac settings | |
956 | * | |
957 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
958 | */ | |
959 | static void bond_do_fail_over_mac(struct bonding *bond, | |
960 | struct slave *new_active, | |
961 | struct slave *old_active) | |
1f78d9f9 HE |
962 | __releases(&bond->curr_slave_lock) |
963 | __releases(&bond->lock) | |
964 | __acquires(&bond->lock) | |
965 | __acquires(&bond->curr_slave_lock) | |
3915c1e8 JV |
966 | { |
967 | u8 tmp_mac[ETH_ALEN]; | |
968 | struct sockaddr saddr; | |
969 | int rv; | |
970 | ||
971 | switch (bond->params.fail_over_mac) { | |
972 | case BOND_FOM_ACTIVE: | |
973 | if (new_active) | |
974 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
975 | new_active->dev->addr_len); | |
976 | break; | |
977 | case BOND_FOM_FOLLOW: | |
978 | /* | |
979 | * if new_active && old_active, swap them | |
980 | * if just old_active, do nothing (going to no active slave) | |
981 | * if just new_active, set new_active to bond's MAC | |
982 | */ | |
983 | if (!new_active) | |
984 | return; | |
985 | ||
986 | write_unlock_bh(&bond->curr_slave_lock); | |
987 | read_unlock(&bond->lock); | |
988 | ||
989 | if (old_active) { | |
990 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
991 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
992 | ETH_ALEN); | |
993 | saddr.sa_family = new_active->dev->type; | |
994 | } else { | |
995 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
996 | saddr.sa_family = bond->dev->type; | |
997 | } | |
998 | ||
999 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
1000 | if (rv) { | |
a4aee5c8 | 1001 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
1002 | bond->dev->name, -rv, new_active->dev->name); |
1003 | goto out; | |
1004 | } | |
1005 | ||
1006 | if (!old_active) | |
1007 | goto out; | |
1008 | ||
1009 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1010 | saddr.sa_family = old_active->dev->type; | |
1011 | ||
1012 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1013 | if (rv) | |
a4aee5c8 | 1014 | pr_err("%s: Error %d setting MAC of slave %s\n", |
3915c1e8 JV |
1015 | bond->dev->name, -rv, new_active->dev->name); |
1016 | out: | |
1017 | read_lock(&bond->lock); | |
1018 | write_lock_bh(&bond->curr_slave_lock); | |
1019 | break; | |
1020 | default: | |
a4aee5c8 | 1021 | pr_err("%s: bond_do_fail_over_mac impossible: bad policy %d\n", |
3915c1e8 JV |
1022 | bond->dev->name, bond->params.fail_over_mac); |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | } | |
1027 | ||
a549952a JP |
1028 | static bool bond_should_change_active(struct bonding *bond) |
1029 | { | |
1030 | struct slave *prim = bond->primary_slave; | |
1031 | struct slave *curr = bond->curr_active_slave; | |
1032 | ||
1033 | if (!prim || !curr || curr->link != BOND_LINK_UP) | |
1034 | return true; | |
1035 | if (bond->force_primary) { | |
1036 | bond->force_primary = false; | |
1037 | return true; | |
1038 | } | |
1039 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_BETTER && | |
1040 | (prim->speed < curr->speed || | |
1041 | (prim->speed == curr->speed && prim->duplex <= curr->duplex))) | |
1042 | return false; | |
1043 | if (bond->params.primary_reselect == BOND_PRI_RESELECT_FAILURE) | |
1044 | return false; | |
1045 | return true; | |
1046 | } | |
3915c1e8 | 1047 | |
1da177e4 LT |
1048 | /** |
1049 | * find_best_interface - select the best available slave to be the active one | |
1050 | * @bond: our bonding struct | |
1051 | * | |
1052 | * Warning: Caller must hold curr_slave_lock for writing. | |
1053 | */ | |
1054 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1055 | { | |
1056 | struct slave *new_active, *old_active; | |
1057 | struct slave *bestslave = NULL; | |
1058 | int mintime = bond->params.updelay; | |
1059 | int i; | |
1060 | ||
49b4ad92 | 1061 | new_active = bond->curr_active_slave; |
1da177e4 LT |
1062 | |
1063 | if (!new_active) { /* there were no active slaves left */ | |
3d632c3f | 1064 | if (bond->slave_cnt > 0) /* found one slave */ |
1da177e4 | 1065 | new_active = bond->first_slave; |
3d632c3f | 1066 | else |
1da177e4 | 1067 | return NULL; /* still no slave, return NULL */ |
1da177e4 LT |
1068 | } |
1069 | ||
1da177e4 | 1070 | if ((bond->primary_slave) && |
a549952a JP |
1071 | bond->primary_slave->link == BOND_LINK_UP && |
1072 | bond_should_change_active(bond)) { | |
1da177e4 LT |
1073 | new_active = bond->primary_slave; |
1074 | } | |
1075 | ||
1076 | /* remember where to stop iterating over the slaves */ | |
1077 | old_active = new_active; | |
1078 | ||
1079 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
b9f60253 JP |
1080 | if (new_active->link == BOND_LINK_UP) { |
1081 | return new_active; | |
1082 | } else if (new_active->link == BOND_LINK_BACK && | |
1083 | IS_UP(new_active->dev)) { | |
1084 | /* link up, but waiting for stabilization */ | |
1085 | if (new_active->delay < mintime) { | |
1086 | mintime = new_active->delay; | |
1087 | bestslave = new_active; | |
1da177e4 LT |
1088 | } |
1089 | } | |
1090 | } | |
1091 | ||
1092 | return bestslave; | |
1093 | } | |
1094 | ||
1095 | /** | |
1096 | * change_active_interface - change the active slave into the specified one | |
1097 | * @bond: our bonding struct | |
1098 | * @new: the new slave to make the active one | |
1099 | * | |
1100 | * Set the new slave to the bond's settings and unset them on the old | |
1101 | * curr_active_slave. | |
1102 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1103 | * | |
1104 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1105 | * because it is apparently the best available slave we have, even though its | |
1106 | * updelay hasn't timed out yet. | |
1107 | * | |
3915c1e8 JV |
1108 | * If new_active is not NULL, caller must hold bond->lock for read and |
1109 | * curr_slave_lock for write_bh. | |
1da177e4 | 1110 | */ |
a77b5325 | 1111 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1112 | { |
1113 | struct slave *old_active = bond->curr_active_slave; | |
1114 | ||
3d632c3f | 1115 | if (old_active == new_active) |
1da177e4 | 1116 | return; |
1da177e4 LT |
1117 | |
1118 | if (new_active) { | |
b2220cad JV |
1119 | new_active->jiffies = jiffies; |
1120 | ||
1da177e4 LT |
1121 | if (new_active->link == BOND_LINK_BACK) { |
1122 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1123 | pr_info("%s: making interface %s the new active one %d ms earlier.\n", |
1124 | bond->dev->name, new_active->dev->name, | |
1125 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1da177e4 LT |
1126 | } |
1127 | ||
1128 | new_active->delay = 0; | |
1129 | new_active->link = BOND_LINK_UP; | |
1da177e4 | 1130 | |
3d632c3f | 1131 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 1132 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); |
1da177e4 | 1133 | |
58402054 | 1134 | if (bond_is_lb(bond)) |
1da177e4 | 1135 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1136 | } else { |
1137 | if (USES_PRIMARY(bond->params.mode)) { | |
a4aee5c8 JP |
1138 | pr_info("%s: making interface %s the new active one.\n", |
1139 | bond->dev->name, new_active->dev->name); | |
1da177e4 LT |
1140 | } |
1141 | } | |
1142 | } | |
1143 | ||
3d632c3f | 1144 | if (USES_PRIMARY(bond->params.mode)) |
1da177e4 | 1145 | bond_mc_swap(bond, new_active, old_active); |
1da177e4 | 1146 | |
58402054 | 1147 | if (bond_is_lb(bond)) { |
1da177e4 | 1148 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1149 | if (old_active) |
1150 | bond_set_slave_inactive_flags(old_active); | |
1151 | if (new_active) | |
1152 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1153 | } else { |
1154 | bond->curr_active_slave = new_active; | |
1155 | } | |
c3ade5ca JV |
1156 | |
1157 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3d632c3f | 1158 | if (old_active) |
c3ade5ca | 1159 | bond_set_slave_inactive_flags(old_active); |
c3ade5ca JV |
1160 | |
1161 | if (new_active) { | |
1162 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1163 | |
709f8a45 OG |
1164 | if (bond->params.fail_over_mac) |
1165 | bond_do_fail_over_mac(bond, new_active, | |
1166 | old_active); | |
3915c1e8 | 1167 | |
ffa95ed5 BH |
1168 | if (netif_running(bond->dev)) { |
1169 | bond->send_grat_arp = bond->params.num_grat_arp; | |
1170 | bond_send_gratuitous_arp(bond); | |
01f3109d | 1171 | |
ffa95ed5 BH |
1172 | bond->send_unsol_na = bond->params.num_unsol_na; |
1173 | bond_send_unsolicited_na(bond); | |
1174 | } | |
305d552a | 1175 | |
01f3109d OG |
1176 | write_unlock_bh(&bond->curr_slave_lock); |
1177 | read_unlock(&bond->lock); | |
1178 | ||
75c78500 | 1179 | netdev_bonding_change(bond->dev, NETDEV_BONDING_FAILOVER); |
01f3109d OG |
1180 | |
1181 | read_lock(&bond->lock); | |
1182 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1183 | } |
c3ade5ca | 1184 | } |
a2fd940f | 1185 | |
5a37e8ca FL |
1186 | /* resend IGMP joins since active slave has changed or |
1187 | * all were sent on curr_active_slave */ | |
ffa95ed5 BH |
1188 | if (((USES_PRIMARY(bond->params.mode) && new_active) || |
1189 | bond->params.mode == BOND_MODE_ROUNDROBIN) && | |
1190 | netif_running(bond->dev)) { | |
c2952c31 | 1191 | bond->igmp_retrans = bond->params.resend_igmp; |
5a37e8ca | 1192 | queue_delayed_work(bond->wq, &bond->mcast_work, 0); |
a2fd940f | 1193 | } |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | /** | |
1197 | * bond_select_active_slave - select a new active slave, if needed | |
1198 | * @bond: our bonding struct | |
1199 | * | |
3d632c3f | 1200 | * This functions should be called when one of the following occurs: |
1da177e4 LT |
1201 | * - The old curr_active_slave has been released or lost its link. |
1202 | * - The primary_slave has got its link back. | |
1203 | * - A slave has got its link back and there's no old curr_active_slave. | |
1204 | * | |
3915c1e8 | 1205 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1206 | */ |
a77b5325 | 1207 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1208 | { |
1209 | struct slave *best_slave; | |
ff59c456 | 1210 | int rv; |
1da177e4 LT |
1211 | |
1212 | best_slave = bond_find_best_slave(bond); | |
1213 | if (best_slave != bond->curr_active_slave) { | |
1214 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1215 | rv = bond_set_carrier(bond); |
1216 | if (!rv) | |
1217 | return; | |
1218 | ||
1219 | if (netif_carrier_ok(bond->dev)) { | |
a4aee5c8 JP |
1220 | pr_info("%s: first active interface up!\n", |
1221 | bond->dev->name); | |
ff59c456 | 1222 | } else { |
a4aee5c8 JP |
1223 | pr_info("%s: now running without any active interface !\n", |
1224 | bond->dev->name); | |
ff59c456 | 1225 | } |
1da177e4 LT |
1226 | } |
1227 | } | |
1228 | ||
1229 | /*--------------------------- slave list handling ---------------------------*/ | |
1230 | ||
1231 | /* | |
1232 | * This function attaches the slave to the end of list. | |
1233 | * | |
1234 | * bond->lock held for writing by caller. | |
1235 | */ | |
1236 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1237 | { | |
1238 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1239 | new_slave->next = new_slave; | |
1240 | new_slave->prev = new_slave; | |
1241 | bond->first_slave = new_slave; | |
1242 | } else { | |
1243 | new_slave->next = bond->first_slave; | |
1244 | new_slave->prev = bond->first_slave->prev; | |
1245 | new_slave->next->prev = new_slave; | |
1246 | new_slave->prev->next = new_slave; | |
1247 | } | |
1248 | ||
1249 | bond->slave_cnt++; | |
1250 | } | |
1251 | ||
1252 | /* | |
1253 | * This function detaches the slave from the list. | |
1254 | * WARNING: no check is made to verify if the slave effectively | |
1255 | * belongs to <bond>. | |
1256 | * Nothing is freed on return, structures are just unchained. | |
1257 | * If any slave pointer in bond was pointing to <slave>, | |
1258 | * it should be changed by the calling function. | |
1259 | * | |
1260 | * bond->lock held for writing by caller. | |
1261 | */ | |
1262 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1263 | { | |
3d632c3f | 1264 | if (slave->next) |
1da177e4 | 1265 | slave->next->prev = slave->prev; |
1da177e4 | 1266 | |
3d632c3f | 1267 | if (slave->prev) |
1da177e4 | 1268 | slave->prev->next = slave->next; |
1da177e4 LT |
1269 | |
1270 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1271 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1272 | bond->first_slave = slave->next; | |
1273 | } else { | |
1274 | bond->first_slave = NULL; /* slave was the last one */ | |
1275 | } | |
1276 | } | |
1277 | ||
1278 | slave->next = NULL; | |
1279 | slave->prev = NULL; | |
1280 | bond->slave_cnt--; | |
1281 | } | |
1282 | ||
f6dc31a8 | 1283 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 1284 | static inline int slave_enable_netpoll(struct slave *slave) |
f6dc31a8 | 1285 | { |
8a8efa22 AW |
1286 | struct netpoll *np; |
1287 | int err = 0; | |
f6dc31a8 | 1288 | |
8a8efa22 AW |
1289 | np = kzalloc(sizeof(*np), GFP_KERNEL); |
1290 | err = -ENOMEM; | |
1291 | if (!np) | |
1292 | goto out; | |
1293 | ||
1294 | np->dev = slave->dev; | |
1295 | err = __netpoll_setup(np); | |
1296 | if (err) { | |
1297 | kfree(np); | |
1298 | goto out; | |
f6dc31a8 | 1299 | } |
8a8efa22 AW |
1300 | slave->np = np; |
1301 | out: | |
1302 | return err; | |
1303 | } | |
1304 | static inline void slave_disable_netpoll(struct slave *slave) | |
1305 | { | |
1306 | struct netpoll *np = slave->np; | |
1307 | ||
1308 | if (!np) | |
1309 | return; | |
1310 | ||
1311 | slave->np = NULL; | |
1312 | synchronize_rcu_bh(); | |
1313 | __netpoll_cleanup(np); | |
1314 | kfree(np); | |
1315 | } | |
1316 | static inline bool slave_dev_support_netpoll(struct net_device *slave_dev) | |
1317 | { | |
1318 | if (slave_dev->priv_flags & IFF_DISABLE_NETPOLL) | |
1319 | return false; | |
1320 | if (!slave_dev->netdev_ops->ndo_poll_controller) | |
1321 | return false; | |
1322 | return true; | |
f6dc31a8 WC |
1323 | } |
1324 | ||
1325 | static void bond_poll_controller(struct net_device *bond_dev) | |
1326 | { | |
8a8efa22 AW |
1327 | } |
1328 | ||
1329 | static void __bond_netpoll_cleanup(struct bonding *bond) | |
1330 | { | |
c2355e1a NH |
1331 | struct slave *slave; |
1332 | int i; | |
1333 | ||
8a8efa22 AW |
1334 | bond_for_each_slave(bond, slave, i) |
1335 | if (IS_UP(slave->dev)) | |
1336 | slave_disable_netpoll(slave); | |
f6dc31a8 | 1337 | } |
f6dc31a8 WC |
1338 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1339 | { | |
1340 | struct bonding *bond = netdev_priv(bond_dev); | |
8a8efa22 AW |
1341 | |
1342 | read_lock(&bond->lock); | |
1343 | __bond_netpoll_cleanup(bond); | |
1344 | read_unlock(&bond->lock); | |
1345 | } | |
1346 | ||
1347 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) | |
1348 | { | |
1349 | struct bonding *bond = netdev_priv(dev); | |
f6dc31a8 | 1350 | struct slave *slave; |
8a8efa22 | 1351 | int i, err = 0; |
f6dc31a8 WC |
1352 | |
1353 | read_lock(&bond->lock); | |
f6dc31a8 | 1354 | bond_for_each_slave(bond, slave, i) { |
8a8efa22 AW |
1355 | if (!IS_UP(slave->dev)) |
1356 | continue; | |
1357 | err = slave_enable_netpoll(slave); | |
1358 | if (err) { | |
1359 | __bond_netpoll_cleanup(bond); | |
1360 | break; | |
f6dc31a8 WC |
1361 | } |
1362 | } | |
1363 | read_unlock(&bond->lock); | |
8a8efa22 | 1364 | return err; |
f6dc31a8 WC |
1365 | } |
1366 | ||
8a8efa22 AW |
1367 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) |
1368 | { | |
1369 | return bond->dev->npinfo; | |
1370 | } | |
f6dc31a8 | 1371 | |
8a8efa22 AW |
1372 | #else |
1373 | static inline int slave_enable_netpoll(struct slave *slave) | |
1374 | { | |
1375 | return 0; | |
1376 | } | |
1377 | static inline void slave_disable_netpoll(struct slave *slave) | |
1378 | { | |
1379 | } | |
f6dc31a8 WC |
1380 | static void bond_netpoll_cleanup(struct net_device *bond_dev) |
1381 | { | |
1382 | } | |
8a8efa22 AW |
1383 | static int bond_netpoll_setup(struct net_device *dev, struct netpoll_info *ni) |
1384 | { | |
1385 | return 0; | |
1386 | } | |
1387 | static struct netpoll_info *bond_netpoll_info(struct bonding *bond) | |
1388 | { | |
1389 | return NULL; | |
1390 | } | |
f6dc31a8 WC |
1391 | #endif |
1392 | ||
1da177e4 LT |
1393 | /*---------------------------------- IOCTL ----------------------------------*/ |
1394 | ||
4ad072c9 AB |
1395 | static int bond_sethwaddr(struct net_device *bond_dev, |
1396 | struct net_device *slave_dev) | |
1da177e4 | 1397 | { |
5a03cdb7 HE |
1398 | pr_debug("bond_dev=%p\n", bond_dev); |
1399 | pr_debug("slave_dev=%p\n", slave_dev); | |
1400 | pr_debug("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1da177e4 LT |
1401 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); |
1402 | return 0; | |
1403 | } | |
1404 | ||
7f353bf2 HX |
1405 | #define BOND_VLAN_FEATURES \ |
1406 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1407 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff | 1408 | |
3d632c3f | 1409 | /* |
8e3babcd | 1410 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1411 | * feature bits are managed elsewhere, so preserve those feature bits |
1412 | * on the master device. | |
8531c5ff AK |
1413 | */ |
1414 | static int bond_compute_features(struct bonding *bond) | |
1415 | { | |
8531c5ff AK |
1416 | struct slave *slave; |
1417 | struct net_device *bond_dev = bond->dev; | |
04ed3e74 MM |
1418 | u32 features = bond_dev->features; |
1419 | u32 vlan_features = 0; | |
3158bf7d MS |
1420 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1421 | bond_dev->hard_header_len); | |
8e3babcd | 1422 | int i; |
8531c5ff | 1423 | |
7f353bf2 | 1424 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
b63365a2 HX |
1425 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; |
1426 | ||
1427 | if (!bond->first_slave) | |
1428 | goto done; | |
1429 | ||
1430 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1431 | |
278339a4 | 1432 | vlan_features = bond->first_slave->dev->vlan_features; |
54ef3137 | 1433 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1434 | features = netdev_increment_features(features, |
1435 | slave->dev->features, | |
1436 | NETIF_F_ONE_FOR_ALL); | |
278339a4 JV |
1437 | vlan_features = netdev_increment_features(vlan_features, |
1438 | slave->dev->vlan_features, | |
1439 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1440 | if (slave->dev->hard_header_len > max_hard_header_len) |
1441 | max_hard_header_len = slave->dev->hard_header_len; | |
1442 | } | |
8531c5ff | 1443 | |
b63365a2 | 1444 | done: |
7f353bf2 | 1445 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
acd1130e MM |
1446 | bond_dev->features = netdev_fix_features(bond_dev, features); |
1447 | bond_dev->vlan_features = netdev_fix_features(bond_dev, vlan_features); | |
54ef3137 | 1448 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1449 | |
1450 | return 0; | |
1451 | } | |
1452 | ||
872254dd MS |
1453 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1454 | struct net_device *slave_dev) | |
1455 | { | |
454d7c9b | 1456 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1457 | |
00829823 | 1458 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1459 | |
1460 | bond_dev->type = slave_dev->type; | |
1461 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1462 | bond_dev->addr_len = slave_dev->addr_len; | |
1463 | ||
1464 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1465 | slave_dev->addr_len); | |
d90a162a | 1466 | bond->setup_by_slave = 1; |
872254dd MS |
1467 | } |
1468 | ||
5b2c4dd2 JP |
1469 | /* On bonding slaves other than the currently active slave, suppress |
1470 | * duplicates except for 802.3ad ETH_P_SLOW, alb non-mcast/bcast, and | |
1471 | * ARP on active-backup slaves with arp_validate enabled. | |
1472 | */ | |
1473 | static bool bond_should_deliver_exact_match(struct sk_buff *skb, | |
1474 | struct net_device *slave_dev, | |
1475 | struct net_device *bond_dev) | |
1476 | { | |
1477 | if (slave_dev->priv_flags & IFF_SLAVE_INACTIVE) { | |
1478 | if (slave_dev->priv_flags & IFF_SLAVE_NEEDARP && | |
1479 | skb->protocol == __cpu_to_be16(ETH_P_ARP)) | |
1480 | return false; | |
1481 | ||
1482 | if (bond_dev->priv_flags & IFF_MASTER_ALB && | |
1483 | skb->pkt_type != PACKET_BROADCAST && | |
1484 | skb->pkt_type != PACKET_MULTICAST) | |
1485 | return false; | |
1486 | ||
1487 | if (bond_dev->priv_flags & IFF_MASTER_8023AD && | |
1488 | skb->protocol == __cpu_to_be16(ETH_P_SLOW)) | |
1489 | return false; | |
1490 | ||
1491 | return true; | |
1492 | } | |
1493 | return false; | |
1494 | } | |
1495 | ||
1496 | static struct sk_buff *bond_handle_frame(struct sk_buff *skb) | |
1497 | { | |
1498 | struct net_device *slave_dev; | |
1499 | struct net_device *bond_dev; | |
1500 | ||
1501 | skb = skb_share_check(skb, GFP_ATOMIC); | |
1502 | if (unlikely(!skb)) | |
1503 | return NULL; | |
1504 | slave_dev = skb->dev; | |
1505 | bond_dev = ACCESS_ONCE(slave_dev->master); | |
1506 | if (unlikely(!bond_dev)) | |
1507 | return skb; | |
1508 | ||
1509 | if (bond_dev->priv_flags & IFF_MASTER_ARPMON) | |
1510 | slave_dev->last_rx = jiffies; | |
1511 | ||
1512 | if (bond_should_deliver_exact_match(skb, slave_dev, bond_dev)) { | |
1513 | skb->deliver_no_wcard = 1; | |
1514 | return skb; | |
1515 | } | |
1516 | ||
1517 | skb->dev = bond_dev; | |
1518 | ||
1519 | if (bond_dev->priv_flags & IFF_MASTER_ALB && | |
1520 | bond_dev->priv_flags & IFF_BRIDGE_PORT && | |
1521 | skb->pkt_type == PACKET_HOST) { | |
1522 | u16 *dest = (u16 *) eth_hdr(skb)->h_dest; | |
1523 | ||
1524 | memcpy(dest, bond_dev->dev_addr, ETH_ALEN); | |
1525 | } | |
1526 | ||
1527 | return skb; | |
1528 | } | |
1529 | ||
1da177e4 | 1530 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1531 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1532 | { |
454d7c9b | 1533 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1534 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 | 1535 | struct slave *new_slave = NULL; |
22bedad3 | 1536 | struct netdev_hw_addr *ha; |
1da177e4 LT |
1537 | struct sockaddr addr; |
1538 | int link_reporting; | |
1539 | int old_features = bond_dev->features; | |
1540 | int res = 0; | |
1541 | ||
552709d5 | 1542 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1543 | slave_ops->ndo_do_ioctl == NULL) { |
a4aee5c8 JP |
1544 | pr_warning("%s: Warning: no link monitoring support for %s\n", |
1545 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1546 | } |
1547 | ||
1548 | /* bond must be initialized by bond_open() before enslaving */ | |
1549 | if (!(bond_dev->flags & IFF_UP)) { | |
a4aee5c8 JP |
1550 | pr_warning("%s: master_dev is not up in bond_enslave\n", |
1551 | bond_dev->name); | |
1da177e4 LT |
1552 | } |
1553 | ||
1554 | /* already enslaved */ | |
1555 | if (slave_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 1556 | pr_debug("Error, Device was already enslaved\n"); |
1da177e4 LT |
1557 | return -EBUSY; |
1558 | } | |
1559 | ||
1560 | /* vlan challenged mutual exclusion */ | |
1561 | /* no need to lock since we're protected by rtnl_lock */ | |
1562 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
5a03cdb7 | 1563 | pr_debug("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
f35188fa | 1564 | if (bond->vlgrp) { |
a4aee5c8 JP |
1565 | pr_err("%s: Error: cannot enslave VLAN challenged slave %s on VLAN enabled bond %s\n", |
1566 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1567 | return -EPERM; |
1568 | } else { | |
a4aee5c8 JP |
1569 | pr_warning("%s: Warning: enslaved VLAN challenged slave %s. Adding VLANs will be blocked as long as %s is part of bond %s\n", |
1570 | bond_dev->name, slave_dev->name, | |
1571 | slave_dev->name, bond_dev->name); | |
1da177e4 LT |
1572 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
1573 | } | |
1574 | } else { | |
5a03cdb7 | 1575 | pr_debug("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); |
1da177e4 LT |
1576 | if (bond->slave_cnt == 0) { |
1577 | /* First slave, and it is not VLAN challenged, | |
1578 | * so remove the block of adding VLANs over the bond. | |
1579 | */ | |
1580 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1581 | } | |
1582 | } | |
1583 | ||
217df670 JV |
1584 | /* |
1585 | * Old ifenslave binaries are no longer supported. These can | |
3d632c3f | 1586 | * be identified with moderate accuracy by the state of the slave: |
217df670 JV |
1587 | * the current ifenslave will set the interface down prior to |
1588 | * enslaving it; the old ifenslave will not. | |
1589 | */ | |
1590 | if ((slave_dev->flags & IFF_UP)) { | |
a4aee5c8 | 1591 | pr_err("%s is up. This may be due to an out of date ifenslave.\n", |
217df670 JV |
1592 | slave_dev->name); |
1593 | res = -EPERM; | |
1594 | goto err_undo_flags; | |
1595 | } | |
1da177e4 | 1596 | |
872254dd MS |
1597 | /* set bonding device ether type by slave - bonding netdevices are |
1598 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1599 | * there is a need to override some of the type dependent attribs/funcs. | |
1600 | * | |
1601 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1602 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1603 | */ | |
1604 | if (bond->slave_cnt == 0) { | |
e36b9d16 | 1605 | if (bond_dev->type != slave_dev->type) { |
e36b9d16 | 1606 | pr_debug("%s: change device type from %d to %d\n", |
a4aee5c8 JP |
1607 | bond_dev->name, |
1608 | bond_dev->type, slave_dev->type); | |
75c78500 | 1609 | |
3ca5b404 JP |
1610 | res = netdev_bonding_change(bond_dev, |
1611 | NETDEV_PRE_TYPE_CHANGE); | |
1612 | res = notifier_to_errno(res); | |
1613 | if (res) { | |
1614 | pr_err("%s: refused to change device type\n", | |
1615 | bond_dev->name); | |
1616 | res = -EBUSY; | |
1617 | goto err_undo_flags; | |
1618 | } | |
75c78500 | 1619 | |
32a806c1 | 1620 | /* Flush unicast and multicast addresses */ |
a748ee24 | 1621 | dev_uc_flush(bond_dev); |
22bedad3 | 1622 | dev_mc_flush(bond_dev); |
32a806c1 | 1623 | |
e36b9d16 MS |
1624 | if (slave_dev->type != ARPHRD_ETHER) |
1625 | bond_setup_by_slave(bond_dev, slave_dev); | |
1626 | else | |
1627 | ether_setup(bond_dev); | |
75c78500 | 1628 | |
93d9b7d7 JP |
1629 | netdev_bonding_change(bond_dev, |
1630 | NETDEV_POST_TYPE_CHANGE); | |
e36b9d16 | 1631 | } |
872254dd | 1632 | } else if (bond_dev->type != slave_dev->type) { |
a4aee5c8 JP |
1633 | pr_err("%s ether type (%d) is different from other slaves (%d), can not enslave it.\n", |
1634 | slave_dev->name, | |
1635 | slave_dev->type, bond_dev->type); | |
1636 | res = -EINVAL; | |
1637 | goto err_undo_flags; | |
872254dd MS |
1638 | } |
1639 | ||
eb7cc59a | 1640 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 | 1641 | if (bond->slave_cnt == 0) { |
a4aee5c8 JP |
1642 | pr_warning("%s: Warning: The first slave device specified does not support setting the MAC address. Setting fail_over_mac to active.", |
1643 | bond_dev->name); | |
3915c1e8 JV |
1644 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1645 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
a4aee5c8 JP |
1646 | 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", |
1647 | bond_dev->name); | |
2ab82852 MS |
1648 | res = -EOPNOTSUPP; |
1649 | goto err_undo_flags; | |
1650 | } | |
1da177e4 LT |
1651 | } |
1652 | ||
c20811a7 JP |
1653 | /* If this is the first slave, then we need to set the master's hardware |
1654 | * address to be the same as the slave's. */ | |
d13a2cb6 | 1655 | if (is_zero_ether_addr(bond->dev->dev_addr)) |
c20811a7 JP |
1656 | memcpy(bond->dev->dev_addr, slave_dev->dev_addr, |
1657 | slave_dev->addr_len); | |
1658 | ||
1659 | ||
243cb4e5 | 1660 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1661 | if (!new_slave) { |
1662 | res = -ENOMEM; | |
1663 | goto err_undo_flags; | |
1664 | } | |
1665 | ||
bb1d9123 AG |
1666 | /* |
1667 | * Set the new_slave's queue_id to be zero. Queue ID mapping | |
1668 | * is set via sysfs or module option if desired. | |
1669 | */ | |
1670 | new_slave->queue_id = 0; | |
1671 | ||
b15ba0fb JP |
1672 | /* Save slave's original mtu and then set it to match the bond */ |
1673 | new_slave->original_mtu = slave_dev->mtu; | |
1674 | res = dev_set_mtu(slave_dev, bond->dev->mtu); | |
1675 | if (res) { | |
1676 | pr_debug("Error %d calling dev_set_mtu\n", res); | |
1677 | goto err_free; | |
1678 | } | |
1679 | ||
217df670 JV |
1680 | /* |
1681 | * Save slave's original ("permanent") mac address for modes | |
1682 | * that need it, and for restoring it upon release, and then | |
1683 | * set it to the master's address | |
1684 | */ | |
1685 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1686 | |
dd957c57 | 1687 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1688 | /* |
1689 | * Set slave to master's mac address. The application already | |
1690 | * set the master's mac address to that of the first slave | |
1691 | */ | |
1692 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1693 | addr.sa_family = slave_dev->type; | |
1694 | res = dev_set_mac_address(slave_dev, &addr); | |
1695 | if (res) { | |
5a03cdb7 | 1696 | pr_debug("Error %d calling set_mac_address\n", res); |
b15ba0fb | 1697 | goto err_restore_mtu; |
2ab82852 | 1698 | } |
217df670 | 1699 | } |
1da177e4 | 1700 | |
1765a575 | 1701 | res = netdev_set_bond_master(slave_dev, bond_dev); |
c2edacf8 | 1702 | if (res) { |
1765a575 | 1703 | pr_debug("Error %d calling netdev_set_bond_master\n", res); |
569f0c4d | 1704 | goto err_restore_mac; |
c2edacf8 | 1705 | } |
5b2c4dd2 JP |
1706 | res = netdev_rx_handler_register(slave_dev, bond_handle_frame, NULL); |
1707 | if (res) { | |
1708 | pr_debug("Error %d calling netdev_rx_handler_register\n", res); | |
1709 | goto err_unset_master; | |
1710 | } | |
1711 | ||
217df670 JV |
1712 | /* open the slave since the application closed it */ |
1713 | res = dev_open(slave_dev); | |
1714 | if (res) { | |
3d632c3f | 1715 | pr_debug("Opening slave %s failed\n", slave_dev->name); |
5b2c4dd2 | 1716 | goto err_unreg_rxhandler; |
1da177e4 LT |
1717 | } |
1718 | ||
1da177e4 | 1719 | new_slave->dev = slave_dev; |
0b680e75 | 1720 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1721 | |
58402054 | 1722 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1723 | /* bond_alb_init_slave() must be called before all other stages since |
1724 | * it might fail and we do not want to have to undo everything | |
1725 | */ | |
1726 | res = bond_alb_init_slave(bond, new_slave); | |
3d632c3f | 1727 | if (res) |
569f0c4d | 1728 | goto err_close; |
1da177e4 LT |
1729 | } |
1730 | ||
1731 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1732 | * master's promisc (and mc) settings only if it becomes the | |
1733 | * curr_active_slave, and that is taken care of later when calling | |
1734 | * bond_change_active() | |
1735 | */ | |
1736 | if (!USES_PRIMARY(bond->params.mode)) { | |
1737 | /* set promiscuity level to new slave */ | |
1738 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1739 | res = dev_set_promiscuity(slave_dev, 1); |
1740 | if (res) | |
1741 | goto err_close; | |
1da177e4 LT |
1742 | } |
1743 | ||
1744 | /* set allmulti level to new slave */ | |
1745 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1746 | res = dev_set_allmulti(slave_dev, 1); |
1747 | if (res) | |
1748 | goto err_close; | |
1da177e4 LT |
1749 | } |
1750 | ||
b9e40857 | 1751 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1752 | /* upload master's mc_list to new slave */ |
22bedad3 JP |
1753 | netdev_for_each_mc_addr(ha, bond_dev) |
1754 | dev_mc_add(slave_dev, ha->addr); | |
b9e40857 | 1755 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1756 | } |
1757 | ||
1758 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1759 | /* add lacpdu mc addr to mc list */ | |
1760 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1761 | ||
22bedad3 | 1762 | dev_mc_add(slave_dev, lacpdu_multicast); |
1da177e4 LT |
1763 | } |
1764 | ||
1765 | bond_add_vlans_on_slave(bond, slave_dev); | |
1766 | ||
1767 | write_lock_bh(&bond->lock); | |
1768 | ||
1769 | bond_attach_slave(bond, new_slave); | |
1770 | ||
1771 | new_slave->delay = 0; | |
1772 | new_slave->link_failure_count = 0; | |
1773 | ||
8531c5ff AK |
1774 | bond_compute_features(bond); |
1775 | ||
3915c1e8 JV |
1776 | write_unlock_bh(&bond->lock); |
1777 | ||
1778 | read_lock(&bond->lock); | |
1779 | ||
f5b2b966 JV |
1780 | new_slave->last_arp_rx = jiffies; |
1781 | ||
1da177e4 LT |
1782 | if (bond->params.miimon && !bond->params.use_carrier) { |
1783 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1784 | ||
1785 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1786 | /* | |
1787 | * miimon is set but a bonded network driver | |
1788 | * does not support ETHTOOL/MII and | |
1789 | * arp_interval is not set. Note: if | |
1790 | * use_carrier is enabled, we will never go | |
1791 | * here (because netif_carrier is always | |
1792 | * supported); thus, we don't need to change | |
1793 | * the messages for netif_carrier. | |
1794 | */ | |
a4aee5c8 | 1795 | 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 | 1796 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1797 | } else if (link_reporting == -1) { |
1798 | /* unable get link status using mii/ethtool */ | |
a4aee5c8 JP |
1799 | 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", |
1800 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1801 | } |
1802 | } | |
1803 | ||
1804 | /* check for initial state */ | |
1805 | if (!bond->params.miimon || | |
1806 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1807 | if (bond->params.updelay) { | |
a4aee5c8 | 1808 | pr_debug("Initial state of slave_dev is BOND_LINK_BACK\n"); |
1da177e4 LT |
1809 | new_slave->link = BOND_LINK_BACK; |
1810 | new_slave->delay = bond->params.updelay; | |
1811 | } else { | |
a4aee5c8 | 1812 | pr_debug("Initial state of slave_dev is BOND_LINK_UP\n"); |
1da177e4 LT |
1813 | new_slave->link = BOND_LINK_UP; |
1814 | } | |
1815 | new_slave->jiffies = jiffies; | |
1816 | } else { | |
a4aee5c8 | 1817 | pr_debug("Initial state of slave_dev is BOND_LINK_DOWN\n"); |
1da177e4 LT |
1818 | new_slave->link = BOND_LINK_DOWN; |
1819 | } | |
1820 | ||
1821 | if (bond_update_speed_duplex(new_slave) && | |
1822 | (new_slave->link != BOND_LINK_DOWN)) { | |
a4aee5c8 JP |
1823 | pr_warning("%s: Warning: failed to get speed and duplex from %s, assumed to be 100Mb/sec and Full.\n", |
1824 | bond_dev->name, new_slave->dev->name); | |
1da177e4 LT |
1825 | |
1826 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a4aee5c8 JP |
1827 | pr_warning("%s: Warning: Operation of 802.3ad mode requires ETHTOOL support in base driver for proper aggregator selection.\n", |
1828 | bond_dev->name); | |
1da177e4 LT |
1829 | } |
1830 | } | |
1831 | ||
1832 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1833 | /* if there is a primary slave, remember it */ | |
a549952a | 1834 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { |
1da177e4 | 1835 | bond->primary_slave = new_slave; |
a549952a JP |
1836 | bond->force_primary = true; |
1837 | } | |
1da177e4 LT |
1838 | } |
1839 | ||
3915c1e8 JV |
1840 | write_lock_bh(&bond->curr_slave_lock); |
1841 | ||
1da177e4 LT |
1842 | switch (bond->params.mode) { |
1843 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1844 | bond_set_slave_inactive_flags(new_slave); |
1845 | bond_select_active_slave(bond); | |
1da177e4 LT |
1846 | break; |
1847 | case BOND_MODE_8023AD: | |
1848 | /* in 802.3ad mode, the internal mechanism | |
1849 | * will activate the slaves in the selected | |
1850 | * aggregator | |
1851 | */ | |
1852 | bond_set_slave_inactive_flags(new_slave); | |
1853 | /* if this is the first slave */ | |
1854 | if (bond->slave_cnt == 1) { | |
1855 | SLAVE_AD_INFO(new_slave).id = 1; | |
1856 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1857 | * can be called only after the mac address of the bond is set | |
1858 | */ | |
1859 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1860 | bond->params.lacp_fast); | |
1861 | } else { | |
1862 | SLAVE_AD_INFO(new_slave).id = | |
1863 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1864 | } | |
1865 | ||
1866 | bond_3ad_bind_slave(new_slave); | |
1867 | break; | |
1868 | case BOND_MODE_TLB: | |
1869 | case BOND_MODE_ALB: | |
1870 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1871 | bond_set_slave_inactive_flags(new_slave); |
5a29f789 | 1872 | bond_select_active_slave(bond); |
1da177e4 LT |
1873 | break; |
1874 | default: | |
5a03cdb7 | 1875 | pr_debug("This slave is always active in trunk mode\n"); |
1da177e4 LT |
1876 | |
1877 | /* always active in trunk mode */ | |
1878 | new_slave->state = BOND_STATE_ACTIVE; | |
1879 | ||
1880 | /* In trunking mode there is little meaning to curr_active_slave | |
1881 | * anyway (it holds no special properties of the bond device), | |
1882 | * so we can change it without calling change_active_interface() | |
1883 | */ | |
3d632c3f | 1884 | if (!bond->curr_active_slave) |
1da177e4 | 1885 | bond->curr_active_slave = new_slave; |
3d632c3f | 1886 | |
1da177e4 LT |
1887 | break; |
1888 | } /* switch(bond_mode) */ | |
1889 | ||
3915c1e8 JV |
1890 | write_unlock_bh(&bond->curr_slave_lock); |
1891 | ||
ff59c456 JV |
1892 | bond_set_carrier(bond); |
1893 | ||
f6dc31a8 | 1894 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 AW |
1895 | slave_dev->npinfo = bond_netpoll_info(bond); |
1896 | if (slave_dev->npinfo) { | |
1897 | if (slave_enable_netpoll(new_slave)) { | |
1898 | read_unlock(&bond->lock); | |
1899 | pr_info("Error, %s: master_dev is using netpoll, " | |
1900 | "but new slave device does not support netpoll.\n", | |
1901 | bond_dev->name); | |
1902 | res = -EBUSY; | |
1903 | goto err_close; | |
1904 | } | |
f6dc31a8 WC |
1905 | } |
1906 | #endif | |
8a8efa22 | 1907 | |
3915c1e8 | 1908 | read_unlock(&bond->lock); |
1da177e4 | 1909 | |
b76cdba9 MW |
1910 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1911 | if (res) | |
569f0c4d | 1912 | goto err_close; |
b76cdba9 | 1913 | |
a4aee5c8 JP |
1914 | pr_info("%s: enslaving %s as a%s interface with a%s link.\n", |
1915 | bond_dev->name, slave_dev->name, | |
1916 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1917 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1da177e4 LT |
1918 | |
1919 | /* enslave is successful */ | |
1920 | return 0; | |
1921 | ||
1922 | /* Undo stages on error */ | |
1da177e4 LT |
1923 | err_close: |
1924 | dev_close(slave_dev); | |
1925 | ||
5b2c4dd2 JP |
1926 | err_unreg_rxhandler: |
1927 | netdev_rx_handler_unregister(slave_dev); | |
1928 | ||
569f0c4d | 1929 | err_unset_master: |
1765a575 | 1930 | netdev_set_bond_master(slave_dev, NULL); |
569f0c4d | 1931 | |
1da177e4 | 1932 | err_restore_mac: |
dd957c57 | 1933 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1934 | /* XXX TODO - fom follow mode needs to change master's |
1935 | * MAC if this slave's MAC is in use by the bond, or at | |
1936 | * least print a warning. | |
1937 | */ | |
2ab82852 MS |
1938 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1939 | addr.sa_family = slave_dev->type; | |
1940 | dev_set_mac_address(slave_dev, &addr); | |
1941 | } | |
1da177e4 | 1942 | |
b15ba0fb JP |
1943 | err_restore_mtu: |
1944 | dev_set_mtu(slave_dev, new_slave->original_mtu); | |
1945 | ||
1da177e4 LT |
1946 | err_free: |
1947 | kfree(new_slave); | |
1948 | ||
1949 | err_undo_flags: | |
1950 | bond_dev->features = old_features; | |
3d632c3f | 1951 | |
1da177e4 LT |
1952 | return res; |
1953 | } | |
1954 | ||
1955 | /* | |
1956 | * Try to release the slave device <slave> from the bond device <master> | |
1957 | * It is legal to access curr_active_slave without a lock because all the function | |
1958 | * is write-locked. | |
1959 | * | |
1960 | * The rules for slave state should be: | |
1961 | * for Active/Backup: | |
1962 | * Active stays on all backups go down | |
1963 | * for Bonded connections: | |
1964 | * The first up interface should be left on and all others downed. | |
1965 | */ | |
a77b5325 | 1966 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1967 | { |
454d7c9b | 1968 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1969 | struct slave *slave, *oldcurrent; |
1970 | struct sockaddr addr; | |
1da177e4 LT |
1971 | |
1972 | /* slave is not a slave or master is not master of this slave */ | |
1973 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1974 | (slave_dev->master != bond_dev)) { | |
a4aee5c8 | 1975 | pr_err("%s: Error: cannot release %s.\n", |
1da177e4 LT |
1976 | bond_dev->name, slave_dev->name); |
1977 | return -EINVAL; | |
1978 | } | |
1979 | ||
e843fa50 | 1980 | block_netpoll_tx(); |
f6dc31a8 | 1981 | netdev_bonding_change(bond_dev, NETDEV_BONDING_DESLAVE); |
1da177e4 LT |
1982 | write_lock_bh(&bond->lock); |
1983 | ||
1984 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1985 | if (!slave) { | |
1986 | /* not a slave of this bond */ | |
a4aee5c8 JP |
1987 | pr_info("%s: %s not enslaved\n", |
1988 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1989 | write_unlock_bh(&bond->lock); |
e843fa50 | 1990 | unblock_netpoll_tx(); |
1da177e4 LT |
1991 | return -EINVAL; |
1992 | } | |
1993 | ||
3915c1e8 | 1994 | if (!bond->params.fail_over_mac) { |
8e95a202 JP |
1995 | if (!compare_ether_addr(bond_dev->dev_addr, slave->perm_hwaddr) && |
1996 | bond->slave_cnt > 1) | |
a4aee5c8 JP |
1997 | 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", |
1998 | bond_dev->name, slave_dev->name, | |
1999 | slave->perm_hwaddr, | |
2000 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
2001 | } |
2002 | ||
2003 | /* Inform AD package of unbinding of slave. */ | |
2004 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2005 | /* must be called before the slave is | |
2006 | * detached from the list | |
2007 | */ | |
2008 | bond_3ad_unbind_slave(slave); | |
2009 | } | |
2010 | ||
a4aee5c8 JP |
2011 | pr_info("%s: releasing %s interface %s\n", |
2012 | bond_dev->name, | |
2013 | (slave->state == BOND_STATE_ACTIVE) ? "active" : "backup", | |
2014 | slave_dev->name); | |
1da177e4 LT |
2015 | |
2016 | oldcurrent = bond->curr_active_slave; | |
2017 | ||
2018 | bond->current_arp_slave = NULL; | |
2019 | ||
2020 | /* release the slave from its bond */ | |
2021 | bond_detach_slave(bond, slave); | |
2022 | ||
8531c5ff AK |
2023 | bond_compute_features(bond); |
2024 | ||
3d632c3f | 2025 | if (bond->primary_slave == slave) |
1da177e4 | 2026 | bond->primary_slave = NULL; |
1da177e4 | 2027 | |
3d632c3f | 2028 | if (oldcurrent == slave) |
1da177e4 | 2029 | bond_change_active_slave(bond, NULL); |
1da177e4 | 2030 | |
58402054 | 2031 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2032 | /* Must be called only after the slave has been |
2033 | * detached from the list and the curr_active_slave | |
2034 | * has been cleared (if our_slave == old_current), | |
2035 | * but before a new active slave is selected. | |
2036 | */ | |
2543331d | 2037 | write_unlock_bh(&bond->lock); |
1da177e4 | 2038 | bond_alb_deinit_slave(bond, slave); |
2543331d | 2039 | write_lock_bh(&bond->lock); |
1da177e4 LT |
2040 | } |
2041 | ||
059fe7a5 JV |
2042 | if (oldcurrent == slave) { |
2043 | /* | |
2044 | * Note that we hold RTNL over this sequence, so there | |
2045 | * is no concern that another slave add/remove event | |
2046 | * will interfere. | |
2047 | */ | |
2048 | write_unlock_bh(&bond->lock); | |
2049 | read_lock(&bond->lock); | |
2050 | write_lock_bh(&bond->curr_slave_lock); | |
2051 | ||
1da177e4 LT |
2052 | bond_select_active_slave(bond); |
2053 | ||
059fe7a5 JV |
2054 | write_unlock_bh(&bond->curr_slave_lock); |
2055 | read_unlock(&bond->lock); | |
2056 | write_lock_bh(&bond->lock); | |
2057 | } | |
2058 | ||
1da177e4 | 2059 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
2060 | bond_set_carrier(bond); |
2061 | ||
1da177e4 LT |
2062 | /* if the last slave was removed, zero the mac address |
2063 | * of the master so it will be set by the application | |
2064 | * to the mac address of the first slave | |
2065 | */ | |
2066 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2067 | ||
f35188fa | 2068 | if (!bond->vlgrp) { |
1da177e4 LT |
2069 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
2070 | } else { | |
a4aee5c8 JP |
2071 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2072 | bond_dev->name, bond_dev->name); | |
2073 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2074 | bond_dev->name); | |
1da177e4 LT |
2075 | } |
2076 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
2077 | !bond_has_challenged_slaves(bond)) { | |
a4aee5c8 JP |
2078 | pr_info("%s: last VLAN challenged slave %s left bond %s. VLAN blocking is removed\n", |
2079 | bond_dev->name, slave_dev->name, bond_dev->name); | |
1da177e4 LT |
2080 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
2081 | } | |
2082 | ||
2083 | write_unlock_bh(&bond->lock); | |
e843fa50 | 2084 | unblock_netpoll_tx(); |
1da177e4 | 2085 | |
b76cdba9 MW |
2086 | /* must do this from outside any spinlocks */ |
2087 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
2088 | ||
1da177e4 LT |
2089 | bond_del_vlans_from_slave(bond, slave_dev); |
2090 | ||
2091 | /* If the mode USES_PRIMARY, then we should only remove its | |
2092 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2093 | * already taken care of above when we detached the slave | |
2094 | */ | |
2095 | if (!USES_PRIMARY(bond->params.mode)) { | |
2096 | /* unset promiscuity level from slave */ | |
3d632c3f | 2097 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2098 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2099 | |
2100 | /* unset allmulti level from slave */ | |
3d632c3f | 2101 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2102 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2103 | |
2104 | /* flush master's mc_list from slave */ | |
b9e40857 | 2105 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2106 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2107 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2108 | } |
2109 | ||
5b2c4dd2 | 2110 | netdev_rx_handler_unregister(slave_dev); |
1765a575 | 2111 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2112 | |
8a8efa22 | 2113 | slave_disable_netpoll(slave); |
f6dc31a8 | 2114 | |
1da177e4 LT |
2115 | /* close slave before restoring its mac address */ |
2116 | dev_close(slave_dev); | |
2117 | ||
3915c1e8 | 2118 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
2119 | /* restore original ("permanent") mac address */ |
2120 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2121 | addr.sa_family = slave_dev->type; | |
2122 | dev_set_mac_address(slave_dev, &addr); | |
2123 | } | |
1da177e4 | 2124 | |
b15ba0fb JP |
2125 | dev_set_mtu(slave_dev, slave->original_mtu); |
2126 | ||
8f903c70 | 2127 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
2128 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
2129 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
2130 | |
2131 | kfree(slave); | |
2132 | ||
2133 | return 0; /* deletion OK */ | |
2134 | } | |
2135 | ||
d90a162a | 2136 | /* |
3d632c3f | 2137 | * First release a slave and than destroy the bond if no more slaves are left. |
d90a162a MS |
2138 | * Must be under rtnl_lock when this function is called. |
2139 | */ | |
26d8ee75 | 2140 | static int bond_release_and_destroy(struct net_device *bond_dev, |
2141 | struct net_device *slave_dev) | |
d90a162a | 2142 | { |
454d7c9b | 2143 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2144 | int ret; |
2145 | ||
2146 | ret = bond_release(bond_dev, slave_dev); | |
2147 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
8a8efa22 | 2148 | bond_dev->priv_flags |= IFF_DISABLE_NETPOLL; |
a4aee5c8 JP |
2149 | pr_info("%s: destroying bond %s.\n", |
2150 | bond_dev->name, bond_dev->name); | |
9e71626c | 2151 | unregister_netdevice(bond_dev); |
d90a162a MS |
2152 | } |
2153 | return ret; | |
2154 | } | |
2155 | ||
1da177e4 LT |
2156 | /* |
2157 | * This function releases all slaves. | |
2158 | */ | |
2159 | static int bond_release_all(struct net_device *bond_dev) | |
2160 | { | |
454d7c9b | 2161 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2162 | struct slave *slave; |
2163 | struct net_device *slave_dev; | |
2164 | struct sockaddr addr; | |
2165 | ||
2166 | write_lock_bh(&bond->lock); | |
2167 | ||
ff59c456 JV |
2168 | netif_carrier_off(bond_dev); |
2169 | ||
3d632c3f | 2170 | if (bond->slave_cnt == 0) |
1da177e4 | 2171 | goto out; |
1da177e4 LT |
2172 | |
2173 | bond->current_arp_slave = NULL; | |
2174 | bond->primary_slave = NULL; | |
2175 | bond_change_active_slave(bond, NULL); | |
2176 | ||
2177 | while ((slave = bond->first_slave) != NULL) { | |
2178 | /* Inform AD package of unbinding of slave | |
2179 | * before slave is detached from the list. | |
2180 | */ | |
3d632c3f | 2181 | if (bond->params.mode == BOND_MODE_8023AD) |
1da177e4 | 2182 | bond_3ad_unbind_slave(slave); |
1da177e4 LT |
2183 | |
2184 | slave_dev = slave->dev; | |
2185 | bond_detach_slave(bond, slave); | |
2186 | ||
2543331d JV |
2187 | /* now that the slave is detached, unlock and perform |
2188 | * all the undo steps that should not be called from | |
2189 | * within a lock. | |
2190 | */ | |
2191 | write_unlock_bh(&bond->lock); | |
2192 | ||
58402054 | 2193 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2194 | /* must be called only after the slave |
2195 | * has been detached from the list | |
2196 | */ | |
2197 | bond_alb_deinit_slave(bond, slave); | |
2198 | } | |
2199 | ||
8531c5ff AK |
2200 | bond_compute_features(bond); |
2201 | ||
b76cdba9 | 2202 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2203 | bond_del_vlans_from_slave(bond, slave_dev); |
2204 | ||
2205 | /* If the mode USES_PRIMARY, then we should only remove its | |
2206 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2207 | * already taken care of above when we detached the slave | |
2208 | */ | |
2209 | if (!USES_PRIMARY(bond->params.mode)) { | |
2210 | /* unset promiscuity level from slave */ | |
3d632c3f | 2211 | if (bond_dev->flags & IFF_PROMISC) |
1da177e4 | 2212 | dev_set_promiscuity(slave_dev, -1); |
1da177e4 LT |
2213 | |
2214 | /* unset allmulti level from slave */ | |
3d632c3f | 2215 | if (bond_dev->flags & IFF_ALLMULTI) |
1da177e4 | 2216 | dev_set_allmulti(slave_dev, -1); |
1da177e4 LT |
2217 | |
2218 | /* flush master's mc_list from slave */ | |
b9e40857 | 2219 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2220 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2221 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2222 | } |
2223 | ||
5b2c4dd2 | 2224 | netdev_rx_handler_unregister(slave_dev); |
1765a575 | 2225 | netdev_set_bond_master(slave_dev, NULL); |
1da177e4 | 2226 | |
8a8efa22 AW |
2227 | slave_disable_netpoll(slave); |
2228 | ||
1da177e4 LT |
2229 | /* close slave before restoring its mac address */ |
2230 | dev_close(slave_dev); | |
2231 | ||
dd957c57 | 2232 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2233 | /* restore original ("permanent") mac address*/ |
2234 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2235 | addr.sa_family = slave_dev->type; | |
2236 | dev_set_mac_address(slave_dev, &addr); | |
2237 | } | |
1da177e4 | 2238 | |
8f903c70 JV |
2239 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
2240 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
2241 | |
2242 | kfree(slave); | |
2243 | ||
2244 | /* re-acquire the lock before getting the next slave */ | |
2245 | write_lock_bh(&bond->lock); | |
2246 | } | |
2247 | ||
2248 | /* zero the mac address of the master so it will be | |
2249 | * set by the application to the mac address of the | |
2250 | * first slave | |
2251 | */ | |
2252 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2253 | ||
f35188fa | 2254 | if (!bond->vlgrp) { |
1da177e4 | 2255 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; |
f35188fa | 2256 | } else { |
a4aee5c8 JP |
2257 | pr_warning("%s: Warning: clearing HW address of %s while it still has VLANs.\n", |
2258 | bond_dev->name, bond_dev->name); | |
2259 | pr_warning("%s: When re-adding slaves, make sure the bond's HW address matches its VLANs'.\n", | |
2260 | bond_dev->name); | |
1da177e4 LT |
2261 | } |
2262 | ||
a4aee5c8 | 2263 | pr_info("%s: released all slaves\n", bond_dev->name); |
1da177e4 LT |
2264 | |
2265 | out: | |
2266 | write_unlock_bh(&bond->lock); | |
1da177e4 LT |
2267 | return 0; |
2268 | } | |
2269 | ||
2270 | /* | |
2271 | * This function changes the active slave to slave <slave_dev>. | |
2272 | * It returns -EINVAL in the following cases. | |
2273 | * - <slave_dev> is not found in the list. | |
2274 | * - There is not active slave now. | |
2275 | * - <slave_dev> is already active. | |
2276 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2277 | * - <slave_dev> is not running. | |
3d632c3f SH |
2278 | * In these cases, this function does nothing. |
2279 | * In the other cases, current_slave pointer is changed and 0 is returned. | |
1da177e4 LT |
2280 | */ |
2281 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2282 | { | |
454d7c9b | 2283 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2284 | struct slave *old_active = NULL; |
2285 | struct slave *new_active = NULL; | |
2286 | int res = 0; | |
2287 | ||
3d632c3f | 2288 | if (!USES_PRIMARY(bond->params.mode)) |
1da177e4 | 2289 | return -EINVAL; |
1da177e4 LT |
2290 | |
2291 | /* Verify that master_dev is indeed the master of slave_dev */ | |
3d632c3f | 2292 | if (!(slave_dev->flags & IFF_SLAVE) || (slave_dev->master != bond_dev)) |
1da177e4 | 2293 | return -EINVAL; |
1da177e4 | 2294 | |
059fe7a5 | 2295 | read_lock(&bond->lock); |
1da177e4 | 2296 | |
059fe7a5 | 2297 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2298 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2299 | read_unlock(&bond->curr_slave_lock); |
2300 | ||
1da177e4 LT |
2301 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2302 | ||
2303 | /* | |
2304 | * Changing to the current active: do nothing; return success. | |
2305 | */ | |
2306 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2307 | read_unlock(&bond->lock); |
1da177e4 LT |
2308 | return 0; |
2309 | } | |
2310 | ||
2311 | if ((new_active) && | |
2312 | (old_active) && | |
2313 | (new_active->link == BOND_LINK_UP) && | |
2314 | IS_UP(new_active->dev)) { | |
e843fa50 | 2315 | block_netpoll_tx(); |
059fe7a5 | 2316 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2317 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2318 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 2319 | unblock_netpoll_tx(); |
3d632c3f | 2320 | } else |
1da177e4 | 2321 | res = -EINVAL; |
1da177e4 | 2322 | |
059fe7a5 | 2323 | read_unlock(&bond->lock); |
1da177e4 LT |
2324 | |
2325 | return res; | |
2326 | } | |
2327 | ||
1da177e4 LT |
2328 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2329 | { | |
454d7c9b | 2330 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2331 | |
2332 | info->bond_mode = bond->params.mode; | |
2333 | info->miimon = bond->params.miimon; | |
2334 | ||
6603a6f2 | 2335 | read_lock(&bond->lock); |
1da177e4 | 2336 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2337 | read_unlock(&bond->lock); |
1da177e4 LT |
2338 | |
2339 | return 0; | |
2340 | } | |
2341 | ||
2342 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2343 | { | |
454d7c9b | 2344 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 2345 | struct slave *slave; |
689c96cc | 2346 | int i, res = -ENODEV; |
1da177e4 | 2347 | |
6603a6f2 | 2348 | read_lock(&bond->lock); |
1da177e4 LT |
2349 | |
2350 | bond_for_each_slave(bond, slave, i) { | |
2351 | if (i == (int)info->slave_id) { | |
689c96cc ED |
2352 | res = 0; |
2353 | strcpy(info->slave_name, slave->dev->name); | |
2354 | info->link = slave->link; | |
2355 | info->state = slave->state; | |
2356 | info->link_failure_count = slave->link_failure_count; | |
1da177e4 LT |
2357 | break; |
2358 | } | |
2359 | } | |
2360 | ||
6603a6f2 | 2361 | read_unlock(&bond->lock); |
1da177e4 | 2362 | |
689c96cc | 2363 | return res; |
1da177e4 LT |
2364 | } |
2365 | ||
2366 | /*-------------------------------- Monitoring -------------------------------*/ | |
2367 | ||
1da177e4 | 2368 | |
f0c76d61 JV |
2369 | static int bond_miimon_inspect(struct bonding *bond) |
2370 | { | |
2371 | struct slave *slave; | |
2372 | int i, link_state, commit = 0; | |
41f89100 JP |
2373 | bool ignore_updelay; |
2374 | ||
2375 | ignore_updelay = !bond->curr_active_slave ? true : false; | |
1da177e4 LT |
2376 | |
2377 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2378 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2379 | |
f0c76d61 | 2380 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2381 | |
2382 | switch (slave->link) { | |
f0c76d61 JV |
2383 | case BOND_LINK_UP: |
2384 | if (link_state) | |
2385 | continue; | |
1da177e4 | 2386 | |
f0c76d61 JV |
2387 | slave->link = BOND_LINK_FAIL; |
2388 | slave->delay = bond->params.downdelay; | |
2389 | if (slave->delay) { | |
a4aee5c8 JP |
2390 | pr_info("%s: link status down for %sinterface %s, disabling it in %d ms.\n", |
2391 | bond->dev->name, | |
2392 | (bond->params.mode == | |
2393 | BOND_MODE_ACTIVEBACKUP) ? | |
2394 | ((slave->state == BOND_STATE_ACTIVE) ? | |
2395 | "active " : "backup ") : "", | |
2396 | slave->dev->name, | |
2397 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2398 | } |
f0c76d61 JV |
2399 | /*FALLTHRU*/ |
2400 | case BOND_LINK_FAIL: | |
2401 | if (link_state) { | |
2402 | /* | |
2403 | * recovered before downdelay expired | |
2404 | */ | |
2405 | slave->link = BOND_LINK_UP; | |
1da177e4 | 2406 | slave->jiffies = jiffies; |
a4aee5c8 JP |
2407 | pr_info("%s: link status up again after %d ms for interface %s.\n", |
2408 | bond->dev->name, | |
2409 | (bond->params.downdelay - slave->delay) * | |
2410 | bond->params.miimon, | |
2411 | slave->dev->name); | |
f0c76d61 | 2412 | continue; |
1da177e4 | 2413 | } |
f0c76d61 JV |
2414 | |
2415 | if (slave->delay <= 0) { | |
2416 | slave->new_link = BOND_LINK_DOWN; | |
2417 | commit++; | |
2418 | continue; | |
1da177e4 | 2419 | } |
1da177e4 | 2420 | |
f0c76d61 JV |
2421 | slave->delay--; |
2422 | break; | |
2423 | ||
2424 | case BOND_LINK_DOWN: | |
2425 | if (!link_state) | |
2426 | continue; | |
2427 | ||
2428 | slave->link = BOND_LINK_BACK; | |
2429 | slave->delay = bond->params.updelay; | |
2430 | ||
2431 | if (slave->delay) { | |
a4aee5c8 JP |
2432 | pr_info("%s: link status up for interface %s, enabling it in %d ms.\n", |
2433 | bond->dev->name, slave->dev->name, | |
2434 | ignore_updelay ? 0 : | |
2435 | bond->params.updelay * | |
2436 | bond->params.miimon); | |
f0c76d61 JV |
2437 | } |
2438 | /*FALLTHRU*/ | |
2439 | case BOND_LINK_BACK: | |
2440 | if (!link_state) { | |
2441 | slave->link = BOND_LINK_DOWN; | |
a4aee5c8 JP |
2442 | pr_info("%s: link status down again after %d ms for interface %s.\n", |
2443 | bond->dev->name, | |
2444 | (bond->params.updelay - slave->delay) * | |
2445 | bond->params.miimon, | |
2446 | slave->dev->name); | |
f0c76d61 JV |
2447 | |
2448 | continue; | |
2449 | } | |
2450 | ||
41f89100 JP |
2451 | if (ignore_updelay) |
2452 | slave->delay = 0; | |
2453 | ||
f0c76d61 JV |
2454 | if (slave->delay <= 0) { |
2455 | slave->new_link = BOND_LINK_UP; | |
2456 | commit++; | |
41f89100 | 2457 | ignore_updelay = false; |
f0c76d61 | 2458 | continue; |
1da177e4 | 2459 | } |
f0c76d61 JV |
2460 | |
2461 | slave->delay--; | |
1da177e4 | 2462 | break; |
f0c76d61 JV |
2463 | } |
2464 | } | |
1da177e4 | 2465 | |
f0c76d61 JV |
2466 | return commit; |
2467 | } | |
1da177e4 | 2468 | |
f0c76d61 JV |
2469 | static void bond_miimon_commit(struct bonding *bond) |
2470 | { | |
2471 | struct slave *slave; | |
2472 | int i; | |
2473 | ||
2474 | bond_for_each_slave(bond, slave, i) { | |
2475 | switch (slave->new_link) { | |
2476 | case BOND_LINK_NOCHANGE: | |
2477 | continue; | |
1da177e4 | 2478 | |
f0c76d61 JV |
2479 | case BOND_LINK_UP: |
2480 | slave->link = BOND_LINK_UP; | |
2481 | slave->jiffies = jiffies; | |
2482 | ||
2483 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2484 | /* prevent it from being the active one */ | |
2485 | slave->state = BOND_STATE_BACKUP; | |
2486 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2487 | /* make it immediately active */ | |
2488 | slave->state = BOND_STATE_ACTIVE; | |
2489 | } else if (slave != bond->primary_slave) { | |
2490 | /* prevent it from being the active one */ | |
2491 | slave->state = BOND_STATE_BACKUP; | |
1da177e4 | 2492 | } |
1da177e4 | 2493 | |
546add79 KPO |
2494 | bond_update_speed_duplex(slave); |
2495 | ||
700c2a77 KPO |
2496 | pr_info("%s: link status definitely up for interface %s, %d Mbps %s duplex.\n", |
2497 | bond->dev->name, slave->dev->name, | |
2498 | slave->speed, slave->duplex ? "full" : "half"); | |
1da177e4 | 2499 | |
f0c76d61 JV |
2500 | /* notify ad that the link status has changed */ |
2501 | if (bond->params.mode == BOND_MODE_8023AD) | |
2502 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2503 | |
58402054 | 2504 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2505 | bond_alb_handle_link_change(bond, slave, |
2506 | BOND_LINK_UP); | |
1da177e4 | 2507 | |
f0c76d61 JV |
2508 | if (!bond->curr_active_slave || |
2509 | (slave == bond->primary_slave)) | |
2510 | goto do_failover; | |
1da177e4 | 2511 | |
f0c76d61 | 2512 | continue; |
059fe7a5 | 2513 | |
f0c76d61 | 2514 | case BOND_LINK_DOWN: |
fba4acda JV |
2515 | if (slave->link_failure_count < UINT_MAX) |
2516 | slave->link_failure_count++; | |
2517 | ||
f0c76d61 | 2518 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2519 | |
f0c76d61 JV |
2520 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2521 | bond->params.mode == BOND_MODE_8023AD) | |
2522 | bond_set_slave_inactive_flags(slave); | |
2523 | ||
a4aee5c8 JP |
2524 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
2525 | bond->dev->name, slave->dev->name); | |
f0c76d61 JV |
2526 | |
2527 | if (bond->params.mode == BOND_MODE_8023AD) | |
2528 | bond_3ad_handle_link_change(slave, | |
2529 | BOND_LINK_DOWN); | |
2530 | ||
ae63e808 | 2531 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2532 | bond_alb_handle_link_change(bond, slave, |
2533 | BOND_LINK_DOWN); | |
2534 | ||
2535 | if (slave == bond->curr_active_slave) | |
2536 | goto do_failover; | |
2537 | ||
2538 | continue; | |
2539 | ||
2540 | default: | |
a4aee5c8 | 2541 | pr_err("%s: invalid new link %d on slave %s\n", |
f0c76d61 JV |
2542 | bond->dev->name, slave->new_link, |
2543 | slave->dev->name); | |
2544 | slave->new_link = BOND_LINK_NOCHANGE; | |
2545 | ||
2546 | continue; | |
2547 | } | |
2548 | ||
2549 | do_failover: | |
2550 | ASSERT_RTNL(); | |
e843fa50 | 2551 | block_netpoll_tx(); |
f0c76d61 JV |
2552 | write_lock_bh(&bond->curr_slave_lock); |
2553 | bond_select_active_slave(bond); | |
2554 | write_unlock_bh(&bond->curr_slave_lock); | |
e843fa50 | 2555 | unblock_netpoll_tx(); |
f0c76d61 JV |
2556 | } |
2557 | ||
2558 | bond_set_carrier(bond); | |
1da177e4 LT |
2559 | } |
2560 | ||
0b0eef66 JV |
2561 | /* |
2562 | * bond_mii_monitor | |
2563 | * | |
2564 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2565 | * inspection, then (if inspection indicates something needs to be done) |
2566 | * an acquisition of appropriate locks followed by a commit phase to | |
2567 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2568 | */ |
2569 | void bond_mii_monitor(struct work_struct *work) | |
2570 | { | |
2571 | struct bonding *bond = container_of(work, struct bonding, | |
2572 | mii_work.work); | |
0b0eef66 JV |
2573 | |
2574 | read_lock(&bond->lock); | |
f0c76d61 JV |
2575 | if (bond->kill_timers) |
2576 | goto out; | |
2577 | ||
2578 | if (bond->slave_cnt == 0) | |
2579 | goto re_arm; | |
b59f9f74 JV |
2580 | |
2581 | if (bond->send_grat_arp) { | |
2582 | read_lock(&bond->curr_slave_lock); | |
2583 | bond_send_gratuitous_arp(bond); | |
2584 | read_unlock(&bond->curr_slave_lock); | |
2585 | } | |
2586 | ||
305d552a BH |
2587 | if (bond->send_unsol_na) { |
2588 | read_lock(&bond->curr_slave_lock); | |
2589 | bond_send_unsolicited_na(bond); | |
2590 | read_unlock(&bond->curr_slave_lock); | |
2591 | } | |
2592 | ||
f0c76d61 | 2593 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2594 | read_unlock(&bond->lock); |
2595 | rtnl_lock(); | |
2596 | read_lock(&bond->lock); | |
f0c76d61 JV |
2597 | |
2598 | bond_miimon_commit(bond); | |
2599 | ||
5655662d JV |
2600 | read_unlock(&bond->lock); |
2601 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2602 | read_lock(&bond->lock); | |
0b0eef66 JV |
2603 | } |
2604 | ||
f0c76d61 JV |
2605 | re_arm: |
2606 | if (bond->params.miimon) | |
2607 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2608 | msecs_to_jiffies(bond->params.miimon)); | |
2609 | out: | |
0b0eef66 | 2610 | read_unlock(&bond->lock); |
0b0eef66 | 2611 | } |
c3ade5ca | 2612 | |
d3bb52b0 | 2613 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2614 | { |
2615 | struct in_device *idev; | |
2616 | struct in_ifaddr *ifa; | |
a144ea4b | 2617 | __be32 addr = 0; |
c3ade5ca JV |
2618 | |
2619 | if (!dev) | |
2620 | return 0; | |
2621 | ||
2622 | rcu_read_lock(); | |
e5ed6399 | 2623 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2624 | if (!idev) |
2625 | goto out; | |
2626 | ||
2627 | ifa = idev->ifa_list; | |
2628 | if (!ifa) | |
2629 | goto out; | |
2630 | ||
2631 | addr = ifa->ifa_local; | |
2632 | out: | |
2633 | rcu_read_unlock(); | |
2634 | return addr; | |
2635 | } | |
2636 | ||
d3bb52b0 | 2637 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2638 | { |
0883beca | 2639 | struct vlan_entry *vlan; |
f5b2b966 JV |
2640 | |
2641 | if (ip == bond->master_ip) | |
2642 | return 1; | |
2643 | ||
0883beca | 2644 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2645 | if (ip == vlan->vlan_ip) |
2646 | return 1; | |
2647 | } | |
2648 | ||
2649 | return 0; | |
2650 | } | |
2651 | ||
c3ade5ca JV |
2652 | /* |
2653 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2654 | * switches in VLAN mode (especially if ports are configured as | |
2655 | * "native" to a VLAN) might not pass non-tagged frames. | |
2656 | */ | |
d3bb52b0 | 2657 | 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 |
2658 | { |
2659 | struct sk_buff *skb; | |
2660 | ||
5a03cdb7 | 2661 | pr_debug("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, |
a4aee5c8 | 2662 | slave_dev->name, dest_ip, src_ip, vlan_id); |
3d632c3f | 2663 | |
c3ade5ca JV |
2664 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, |
2665 | NULL, slave_dev->dev_addr, NULL); | |
2666 | ||
2667 | if (!skb) { | |
a4aee5c8 | 2668 | pr_err("ARP packet allocation failed\n"); |
c3ade5ca JV |
2669 | return; |
2670 | } | |
2671 | if (vlan_id) { | |
2672 | skb = vlan_put_tag(skb, vlan_id); | |
2673 | if (!skb) { | |
a4aee5c8 | 2674 | pr_err("failed to insert VLAN tag\n"); |
c3ade5ca JV |
2675 | return; |
2676 | } | |
2677 | } | |
2678 | arp_xmit(skb); | |
2679 | } | |
2680 | ||
2681 | ||
1da177e4 LT |
2682 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2683 | { | |
c3ade5ca | 2684 | int i, vlan_id, rv; |
d3bb52b0 | 2685 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2686 | struct vlan_entry *vlan; |
c3ade5ca JV |
2687 | struct net_device *vlan_dev; |
2688 | struct flowi fl; | |
2689 | struct rtable *rt; | |
1da177e4 | 2690 | |
6b780567 MW |
2691 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2692 | if (!targets[i]) | |
5a31bec0 | 2693 | break; |
5a03cdb7 | 2694 | pr_debug("basa: target %x\n", targets[i]); |
f35188fa | 2695 | if (!bond->vlgrp) { |
5a03cdb7 | 2696 | pr_debug("basa: empty vlan: arp_send\n"); |
c3ade5ca JV |
2697 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2698 | bond->master_ip, 0); | |
2699 | continue; | |
2700 | } | |
2701 | ||
2702 | /* | |
2703 | * If VLANs are configured, we do a route lookup to | |
2704 | * determine which VLAN interface would be used, so we | |
2705 | * can tag the ARP with the proper VLAN tag. | |
2706 | */ | |
2707 | memset(&fl, 0, sizeof(fl)); | |
2708 | fl.fl4_dst = targets[i]; | |
2709 | fl.fl4_tos = RTO_ONLINK; | |
2710 | ||
ec87fd3b | 2711 | rv = ip_route_output_key(dev_net(bond->dev), &rt, &fl); |
c3ade5ca JV |
2712 | if (rv) { |
2713 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2714 | pr_warning("%s: no route to arp_ip_target %pI4\n", |
2715 | bond->dev->name, &fl.fl4_dst); | |
c3ade5ca JV |
2716 | } |
2717 | continue; | |
2718 | } | |
2719 | ||
2720 | /* | |
2721 | * This target is not on a VLAN | |
2722 | */ | |
d8d1f30b | 2723 | if (rt->dst.dev == bond->dev) { |
ed4b9f80 | 2724 | ip_rt_put(rt); |
5a03cdb7 | 2725 | pr_debug("basa: rtdev == bond->dev: arp_send\n"); |
c3ade5ca JV |
2726 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2727 | bond->master_ip, 0); | |
2728 | continue; | |
2729 | } | |
2730 | ||
2731 | vlan_id = 0; | |
0883beca | 2732 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2733 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
d8d1f30b | 2734 | if (vlan_dev == rt->dst.dev) { |
c3ade5ca | 2735 | vlan_id = vlan->vlan_id; |
5a03cdb7 | 2736 | pr_debug("basa: vlan match on %s %d\n", |
c3ade5ca JV |
2737 | vlan_dev->name, vlan_id); |
2738 | break; | |
2739 | } | |
2740 | } | |
2741 | ||
2742 | if (vlan_id) { | |
ed4b9f80 | 2743 | ip_rt_put(rt); |
c3ade5ca JV |
2744 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2745 | vlan->vlan_ip, vlan_id); | |
2746 | continue; | |
2747 | } | |
2748 | ||
2749 | if (net_ratelimit()) { | |
a4aee5c8 JP |
2750 | pr_warning("%s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2751 | bond->dev->name, &fl.fl4_dst, | |
d8d1f30b | 2752 | rt->dst.dev ? rt->dst.dev->name : "NULL"); |
c3ade5ca | 2753 | } |
ed4b9f80 | 2754 | ip_rt_put(rt); |
c3ade5ca JV |
2755 | } |
2756 | } | |
2757 | ||
2758 | /* | |
2759 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2760 | * for each VLAN above us. | |
b59f9f74 JV |
2761 | * |
2762 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2763 | */ |
2764 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2765 | { | |
2766 | struct slave *slave = bond->curr_active_slave; | |
2767 | struct vlan_entry *vlan; | |
2768 | struct net_device *vlan_dev; | |
2769 | ||
a4aee5c8 JP |
2770 | pr_debug("bond_send_grat_arp: bond %s slave %s\n", |
2771 | bond->dev->name, slave ? slave->dev->name : "NULL"); | |
b59f9f74 JV |
2772 | |
2773 | if (!slave || !bond->send_grat_arp || | |
2774 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2775 | return; |
2776 | ||
b59f9f74 JV |
2777 | bond->send_grat_arp--; |
2778 | ||
c3ade5ca JV |
2779 | if (bond->master_ip) { |
2780 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2781 | bond->master_ip, 0); |
c3ade5ca JV |
2782 | } |
2783 | ||
f35188fa JV |
2784 | if (!bond->vlgrp) |
2785 | return; | |
2786 | ||
c3ade5ca | 2787 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2788 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2789 | if (vlan->vlan_ip) { |
2790 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2791 | vlan->vlan_ip, vlan->vlan_id); | |
2792 | } | |
1da177e4 LT |
2793 | } |
2794 | } | |
2795 | ||
d3bb52b0 | 2796 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2797 | { |
2798 | int i; | |
d3bb52b0 | 2799 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 | 2800 | |
f5b2b966 | 2801 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { |
5a03cdb7 | 2802 | pr_debug("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
a4aee5c8 JP |
2803 | &sip, &tip, i, &targets[i], |
2804 | bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2805 | if (sip == targets[i]) { |
2806 | if (bond_has_this_ip(bond, tip)) | |
2807 | slave->last_arp_rx = jiffies; | |
2808 | return; | |
2809 | } | |
2810 | } | |
2811 | } | |
2812 | ||
2813 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2814 | { | |
2815 | struct arphdr *arp; | |
2816 | struct slave *slave; | |
2817 | struct bonding *bond; | |
2818 | unsigned char *arp_ptr; | |
d3bb52b0 | 2819 | __be32 sip, tip; |
f5b2b966 | 2820 | |
1f3c8804 AG |
2821 | if (dev->priv_flags & IFF_802_1Q_VLAN) { |
2822 | /* | |
2823 | * When using VLANS and bonding, dev and oriv_dev may be | |
2824 | * incorrect if the physical interface supports VLAN | |
2825 | * acceleration. With this change ARP validation now | |
2826 | * works for hosts only reachable on the VLAN interface. | |
2827 | */ | |
2828 | dev = vlan_dev_real_dev(dev); | |
2829 | orig_dev = dev_get_by_index_rcu(dev_net(skb->dev),skb->skb_iif); | |
2830 | } | |
2831 | ||
f5b2b966 JV |
2832 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2833 | goto out; | |
2834 | ||
454d7c9b | 2835 | bond = netdev_priv(dev); |
f5b2b966 JV |
2836 | read_lock(&bond->lock); |
2837 | ||
5a03cdb7 | 2838 | pr_debug("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", |
a4aee5c8 JP |
2839 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", |
2840 | orig_dev ? orig_dev->name : "NULL"); | |
f5b2b966 JV |
2841 | |
2842 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2843 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2844 | goto out_unlock; | |
2845 | ||
b3053251 NH |
2846 | skb = skb_share_check(skb, GFP_ATOMIC); |
2847 | if (!skb) | |
2848 | goto out_unlock; | |
2849 | ||
988b7050 | 2850 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2851 | goto out_unlock; |
2852 | ||
d0a92be0 | 2853 | arp = arp_hdr(skb); |
f5b2b966 JV |
2854 | if (arp->ar_hln != dev->addr_len || |
2855 | skb->pkt_type == PACKET_OTHERHOST || | |
2856 | skb->pkt_type == PACKET_LOOPBACK || | |
2857 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2858 | arp->ar_pro != htons(ETH_P_IP) || | |
2859 | arp->ar_pln != 4) | |
2860 | goto out_unlock; | |
2861 | ||
2862 | arp_ptr = (unsigned char *)(arp + 1); | |
2863 | arp_ptr += dev->addr_len; | |
2864 | memcpy(&sip, arp_ptr, 4); | |
2865 | arp_ptr += 4 + dev->addr_len; | |
2866 | memcpy(&tip, arp_ptr, 4); | |
2867 | ||
5a03cdb7 | 2868 | pr_debug("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
a4aee5c8 JP |
2869 | bond->dev->name, slave->dev->name, slave->state, |
2870 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2871 | &sip, &tip); | |
f5b2b966 JV |
2872 | |
2873 | /* | |
2874 | * Backup slaves won't see the ARP reply, but do come through | |
2875 | * here for each ARP probe (so we swap the sip/tip to validate | |
2876 | * the probe). In a "redundant switch, common router" type of | |
2877 | * configuration, the ARP probe will (hopefully) travel from | |
2878 | * the active, through one switch, the router, then the other | |
2879 | * switch before reaching the backup. | |
2880 | */ | |
2881 | if (slave->state == BOND_STATE_ACTIVE) | |
2882 | bond_validate_arp(bond, slave, sip, tip); | |
2883 | else | |
2884 | bond_validate_arp(bond, slave, tip, sip); | |
2885 | ||
2886 | out_unlock: | |
2887 | read_unlock(&bond->lock); | |
2888 | out: | |
2889 | dev_kfree_skb(skb); | |
2890 | return NET_RX_SUCCESS; | |
2891 | } | |
2892 | ||
1da177e4 LT |
2893 | /* |
2894 | * this function is called regularly to monitor each slave's link | |
2895 | * ensuring that traffic is being sent and received when arp monitoring | |
2896 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2897 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2898 | * arp monitoring in active backup mode. | |
2899 | */ | |
1b76b316 | 2900 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2901 | { |
1b76b316 JV |
2902 | struct bonding *bond = container_of(work, struct bonding, |
2903 | arp_work.work); | |
1da177e4 LT |
2904 | struct slave *slave, *oldcurrent; |
2905 | int do_failover = 0; | |
2906 | int delta_in_ticks; | |
2907 | int i; | |
2908 | ||
2909 | read_lock(&bond->lock); | |
2910 | ||
5ce0da8f | 2911 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 2912 | |
3d632c3f | 2913 | if (bond->kill_timers) |
1da177e4 | 2914 | goto out; |
1da177e4 | 2915 | |
3d632c3f | 2916 | if (bond->slave_cnt == 0) |
1da177e4 | 2917 | goto re_arm; |
1da177e4 LT |
2918 | |
2919 | read_lock(&bond->curr_slave_lock); | |
2920 | oldcurrent = bond->curr_active_slave; | |
2921 | read_unlock(&bond->curr_slave_lock); | |
2922 | ||
2923 | /* see if any of the previous devices are up now (i.e. they have | |
2924 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2925 | * the picture unless it is null. also, slave->jiffies is not needed | |
2926 | * here because we send an arp on each slave and give a slave as | |
2927 | * long as it needs to get the tx/rx within the delta. | |
2928 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2929 | * so it can wait | |
2930 | */ | |
2931 | bond_for_each_slave(bond, slave, i) { | |
cb32f2a0 JB |
2932 | unsigned long trans_start = dev_trans_start(slave->dev); |
2933 | ||
1da177e4 | 2934 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
2935 | if (time_in_range(jiffies, |
2936 | trans_start - delta_in_ticks, | |
2937 | trans_start + delta_in_ticks) && | |
2938 | time_in_range(jiffies, | |
2939 | slave->dev->last_rx - delta_in_ticks, | |
2940 | slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2941 | |
2942 | slave->link = BOND_LINK_UP; | |
2943 | slave->state = BOND_STATE_ACTIVE; | |
2944 | ||
2945 | /* primary_slave has no meaning in round-robin | |
2946 | * mode. the window of a slave being up and | |
2947 | * curr_active_slave being null after enslaving | |
2948 | * is closed. | |
2949 | */ | |
2950 | if (!oldcurrent) { | |
a4aee5c8 JP |
2951 | pr_info("%s: link status definitely up for interface %s, ", |
2952 | bond->dev->name, | |
2953 | slave->dev->name); | |
1da177e4 LT |
2954 | do_failover = 1; |
2955 | } else { | |
a4aee5c8 JP |
2956 | pr_info("%s: interface %s is now up\n", |
2957 | bond->dev->name, | |
2958 | slave->dev->name); | |
1da177e4 LT |
2959 | } |
2960 | } | |
2961 | } else { | |
2962 | /* slave->link == BOND_LINK_UP */ | |
2963 | ||
2964 | /* not all switches will respond to an arp request | |
2965 | * when the source ip is 0, so don't take the link down | |
2966 | * if we don't know our ip yet | |
2967 | */ | |
cb32f2a0 JB |
2968 | if (!time_in_range(jiffies, |
2969 | trans_start - delta_in_ticks, | |
2970 | trans_start + 2 * delta_in_ticks) || | |
2971 | !time_in_range(jiffies, | |
2972 | slave->dev->last_rx - delta_in_ticks, | |
2973 | slave->dev->last_rx + 2 * delta_in_ticks)) { | |
1da177e4 LT |
2974 | |
2975 | slave->link = BOND_LINK_DOWN; | |
2976 | slave->state = BOND_STATE_BACKUP; | |
2977 | ||
3d632c3f | 2978 | if (slave->link_failure_count < UINT_MAX) |
1da177e4 | 2979 | slave->link_failure_count++; |
1da177e4 | 2980 | |
a4aee5c8 JP |
2981 | pr_info("%s: interface %s is now down.\n", |
2982 | bond->dev->name, | |
2983 | slave->dev->name); | |
1da177e4 | 2984 | |
3d632c3f | 2985 | if (slave == oldcurrent) |
1da177e4 | 2986 | do_failover = 1; |
1da177e4 LT |
2987 | } |
2988 | } | |
2989 | ||
2990 | /* note: if switch is in round-robin mode, all links | |
2991 | * must tx arp to ensure all links rx an arp - otherwise | |
2992 | * links may oscillate or not come up at all; if switch is | |
2993 | * in something like xor mode, there is nothing we can | |
2994 | * do - all replies will be rx'ed on same link causing slaves | |
2995 | * to be unstable during low/no traffic periods | |
2996 | */ | |
3d632c3f | 2997 | if (IS_UP(slave->dev)) |
1da177e4 | 2998 | bond_arp_send_all(bond, slave); |
1da177e4 LT |
2999 | } |
3000 | ||
3001 | if (do_failover) { | |
e843fa50 | 3002 | block_netpoll_tx(); |
059fe7a5 | 3003 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
3004 | |
3005 | bond_select_active_slave(bond); | |
3006 | ||
059fe7a5 | 3007 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3008 | unblock_netpoll_tx(); |
1da177e4 LT |
3009 | } |
3010 | ||
3011 | re_arm: | |
1b76b316 JV |
3012 | if (bond->params.arp_interval) |
3013 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
3014 | out: |
3015 | read_unlock(&bond->lock); | |
3016 | } | |
3017 | ||
3018 | /* | |
b2220cad JV |
3019 | * Called to inspect slaves for active-backup mode ARP monitor link state |
3020 | * changes. Sets new_link in slaves to specify what action should take | |
3021 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
3022 | * to link states must be committed. | |
3023 | * | |
3024 | * Called with bond->lock held for read. | |
1da177e4 | 3025 | */ |
b2220cad | 3026 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 3027 | { |
1da177e4 | 3028 | struct slave *slave; |
b2220cad | 3029 | int i, commit = 0; |
cb32f2a0 | 3030 | unsigned long trans_start; |
1da177e4 | 3031 | |
b2220cad JV |
3032 | bond_for_each_slave(bond, slave, i) { |
3033 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 3034 | |
b2220cad | 3035 | if (slave->link != BOND_LINK_UP) { |
cb32f2a0 JB |
3036 | if (time_in_range(jiffies, |
3037 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3038 | slave_last_rx(bond, slave) + delta_in_ticks)) { | |
3039 | ||
b2220cad JV |
3040 | slave->new_link = BOND_LINK_UP; |
3041 | commit++; | |
3042 | } | |
1da177e4 | 3043 | |
b2220cad JV |
3044 | continue; |
3045 | } | |
1da177e4 | 3046 | |
b2220cad JV |
3047 | /* |
3048 | * Give slaves 2*delta after being enslaved or made | |
3049 | * active. This avoids bouncing, as the last receive | |
3050 | * times need a full ARP monitor cycle to be updated. | |
3051 | */ | |
cb32f2a0 JB |
3052 | if (time_in_range(jiffies, |
3053 | slave->jiffies - delta_in_ticks, | |
3054 | slave->jiffies + 2 * delta_in_ticks)) | |
b2220cad JV |
3055 | continue; |
3056 | ||
3057 | /* | |
3058 | * Backup slave is down if: | |
3059 | * - No current_arp_slave AND | |
3060 | * - more than 3*delta since last receive AND | |
3061 | * - the bond has an IP address | |
3062 | * | |
3063 | * Note: a non-null current_arp_slave indicates | |
3064 | * the curr_active_slave went down and we are | |
3065 | * searching for a new one; under this condition | |
3066 | * we only take the curr_active_slave down - this | |
3067 | * gives each slave a chance to tx/rx traffic | |
3068 | * before being taken out | |
3069 | */ | |
3070 | if (slave->state == BOND_STATE_BACKUP && | |
3071 | !bond->current_arp_slave && | |
cb32f2a0 JB |
3072 | !time_in_range(jiffies, |
3073 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3074 | slave_last_rx(bond, slave) + 3 * delta_in_ticks)) { | |
3075 | ||
b2220cad JV |
3076 | slave->new_link = BOND_LINK_DOWN; |
3077 | commit++; | |
3078 | } | |
3079 | ||
3080 | /* | |
3081 | * Active slave is down if: | |
3082 | * - more than 2*delta since transmitting OR | |
3083 | * - (more than 2*delta since receive AND | |
3084 | * the bond has an IP address) | |
3085 | */ | |
cb32f2a0 | 3086 | trans_start = dev_trans_start(slave->dev); |
b2220cad | 3087 | if ((slave->state == BOND_STATE_ACTIVE) && |
cb32f2a0 JB |
3088 | (!time_in_range(jiffies, |
3089 | trans_start - delta_in_ticks, | |
3090 | trans_start + 2 * delta_in_ticks) || | |
3091 | !time_in_range(jiffies, | |
3092 | slave_last_rx(bond, slave) - delta_in_ticks, | |
3093 | slave_last_rx(bond, slave) + 2 * delta_in_ticks))) { | |
3094 | ||
b2220cad JV |
3095 | slave->new_link = BOND_LINK_DOWN; |
3096 | commit++; | |
3097 | } | |
1da177e4 LT |
3098 | } |
3099 | ||
b2220cad JV |
3100 | return commit; |
3101 | } | |
1da177e4 | 3102 | |
b2220cad JV |
3103 | /* |
3104 | * Called to commit link state changes noted by inspection step of | |
3105 | * active-backup mode ARP monitor. | |
3106 | * | |
3107 | * Called with RTNL and bond->lock for read. | |
3108 | */ | |
3109 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
3110 | { | |
3111 | struct slave *slave; | |
3112 | int i; | |
cb32f2a0 | 3113 | unsigned long trans_start; |
1da177e4 | 3114 | |
b2220cad JV |
3115 | bond_for_each_slave(bond, slave, i) { |
3116 | switch (slave->new_link) { | |
3117 | case BOND_LINK_NOCHANGE: | |
3118 | continue; | |
ff59c456 | 3119 | |
b2220cad | 3120 | case BOND_LINK_UP: |
cb32f2a0 | 3121 | trans_start = dev_trans_start(slave->dev); |
b9f60253 | 3122 | if ((!bond->curr_active_slave && |
cb32f2a0 JB |
3123 | time_in_range(jiffies, |
3124 | trans_start - delta_in_ticks, | |
3125 | trans_start + delta_in_ticks)) || | |
b9f60253 | 3126 | bond->curr_active_slave != slave) { |
b2220cad | 3127 | slave->link = BOND_LINK_UP; |
b2220cad JV |
3128 | bond->current_arp_slave = NULL; |
3129 | ||
a4aee5c8 | 3130 | pr_info("%s: link status definitely up for interface %s.\n", |
b9f60253 | 3131 | bond->dev->name, slave->dev->name); |
b2220cad | 3132 | |
b9f60253 JP |
3133 | if (!bond->curr_active_slave || |
3134 | (slave == bond->primary_slave)) | |
3135 | goto do_failover; | |
1da177e4 | 3136 | |
b9f60253 | 3137 | } |
1da177e4 | 3138 | |
b9f60253 | 3139 | continue; |
1da177e4 | 3140 | |
b2220cad JV |
3141 | case BOND_LINK_DOWN: |
3142 | if (slave->link_failure_count < UINT_MAX) | |
3143 | slave->link_failure_count++; | |
3144 | ||
3145 | slave->link = BOND_LINK_DOWN; | |
b9f60253 | 3146 | bond_set_slave_inactive_flags(slave); |
b2220cad | 3147 | |
a4aee5c8 | 3148 | pr_info("%s: link status definitely down for interface %s, disabling it\n", |
b9f60253 | 3149 | bond->dev->name, slave->dev->name); |
b2220cad | 3150 | |
b9f60253 | 3151 | if (slave == bond->curr_active_slave) { |
b2220cad | 3152 | bond->current_arp_slave = NULL; |
b9f60253 | 3153 | goto do_failover; |
1da177e4 | 3154 | } |
b9f60253 JP |
3155 | |
3156 | continue; | |
b2220cad JV |
3157 | |
3158 | default: | |
a4aee5c8 | 3159 | pr_err("%s: impossible: new_link %d on slave %s\n", |
b2220cad JV |
3160 | bond->dev->name, slave->new_link, |
3161 | slave->dev->name); | |
b9f60253 | 3162 | continue; |
1da177e4 | 3163 | } |
1da177e4 | 3164 | |
b9f60253 JP |
3165 | do_failover: |
3166 | ASSERT_RTNL(); | |
e843fa50 | 3167 | block_netpoll_tx(); |
b2220cad | 3168 | write_lock_bh(&bond->curr_slave_lock); |
b9f60253 | 3169 | bond_select_active_slave(bond); |
b2220cad | 3170 | write_unlock_bh(&bond->curr_slave_lock); |
e843fa50 | 3171 | unblock_netpoll_tx(); |
b2220cad | 3172 | } |
1da177e4 | 3173 | |
b2220cad JV |
3174 | bond_set_carrier(bond); |
3175 | } | |
1da177e4 | 3176 | |
b2220cad JV |
3177 | /* |
3178 | * Send ARP probes for active-backup mode ARP monitor. | |
3179 | * | |
3180 | * Called with bond->lock held for read. | |
3181 | */ | |
3182 | static void bond_ab_arp_probe(struct bonding *bond) | |
3183 | { | |
3184 | struct slave *slave; | |
3185 | int i; | |
1da177e4 | 3186 | |
b2220cad | 3187 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3188 | |
b2220cad | 3189 | if (bond->current_arp_slave && bond->curr_active_slave) |
a4aee5c8 JP |
3190 | pr_info("PROBE: c_arp %s && cas %s BAD\n", |
3191 | bond->current_arp_slave->dev->name, | |
3192 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3193 | |
b2220cad JV |
3194 | if (bond->curr_active_slave) { |
3195 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3196 | read_unlock(&bond->curr_slave_lock); | |
3197 | return; | |
3198 | } | |
1da177e4 | 3199 | |
b2220cad | 3200 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3201 | |
b2220cad JV |
3202 | /* if we don't have a curr_active_slave, search for the next available |
3203 | * backup slave from the current_arp_slave and make it the candidate | |
3204 | * for becoming the curr_active_slave | |
3205 | */ | |
1da177e4 | 3206 | |
b2220cad JV |
3207 | if (!bond->current_arp_slave) { |
3208 | bond->current_arp_slave = bond->first_slave; | |
3209 | if (!bond->current_arp_slave) | |
3210 | return; | |
3211 | } | |
1da177e4 | 3212 | |
b2220cad | 3213 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3214 | |
b2220cad JV |
3215 | /* search for next candidate */ |
3216 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3217 | if (IS_UP(slave->dev)) { | |
3218 | slave->link = BOND_LINK_BACK; | |
3219 | bond_set_slave_active_flags(slave); | |
3220 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3221 | slave->jiffies = jiffies; |
b2220cad JV |
3222 | bond->current_arp_slave = slave; |
3223 | break; | |
1da177e4 LT |
3224 | } |
3225 | ||
b2220cad JV |
3226 | /* if the link state is up at this point, we |
3227 | * mark it down - this can happen if we have | |
3228 | * simultaneous link failures and | |
3229 | * reselect_active_interface doesn't make this | |
3230 | * one the current slave so it is still marked | |
3231 | * up when it is actually down | |
1da177e4 | 3232 | */ |
b2220cad JV |
3233 | if (slave->link == BOND_LINK_UP) { |
3234 | slave->link = BOND_LINK_DOWN; | |
3235 | if (slave->link_failure_count < UINT_MAX) | |
3236 | slave->link_failure_count++; | |
1da177e4 | 3237 | |
b2220cad JV |
3238 | bond_set_slave_inactive_flags(slave); |
3239 | ||
a4aee5c8 JP |
3240 | pr_info("%s: backup interface %s is now down.\n", |
3241 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3242 | } |
b2220cad JV |
3243 | } |
3244 | } | |
1da177e4 | 3245 | |
b2220cad JV |
3246 | void bond_activebackup_arp_mon(struct work_struct *work) |
3247 | { | |
3248 | struct bonding *bond = container_of(work, struct bonding, | |
3249 | arp_work.work); | |
3250 | int delta_in_ticks; | |
1da177e4 | 3251 | |
b2220cad | 3252 | read_lock(&bond->lock); |
1da177e4 | 3253 | |
b2220cad JV |
3254 | if (bond->kill_timers) |
3255 | goto out; | |
1da177e4 | 3256 | |
b2220cad | 3257 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3258 | |
b2220cad JV |
3259 | if (bond->slave_cnt == 0) |
3260 | goto re_arm; | |
3261 | ||
b59f9f74 JV |
3262 | if (bond->send_grat_arp) { |
3263 | read_lock(&bond->curr_slave_lock); | |
3264 | bond_send_gratuitous_arp(bond); | |
3265 | read_unlock(&bond->curr_slave_lock); | |
3266 | } | |
3267 | ||
305d552a BH |
3268 | if (bond->send_unsol_na) { |
3269 | read_lock(&bond->curr_slave_lock); | |
3270 | bond_send_unsolicited_na(bond); | |
3271 | read_unlock(&bond->curr_slave_lock); | |
3272 | } | |
3273 | ||
b2220cad JV |
3274 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3275 | read_unlock(&bond->lock); | |
3276 | rtnl_lock(); | |
3277 | read_lock(&bond->lock); | |
3278 | ||
3279 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3280 | ||
3281 | read_unlock(&bond->lock); | |
3282 | rtnl_unlock(); | |
3283 | read_lock(&bond->lock); | |
1da177e4 LT |
3284 | } |
3285 | ||
b2220cad JV |
3286 | bond_ab_arp_probe(bond); |
3287 | ||
1da177e4 | 3288 | re_arm: |
3d632c3f | 3289 | if (bond->params.arp_interval) |
1b76b316 | 3290 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3291 | out: |
3292 | read_unlock(&bond->lock); | |
3293 | } | |
3294 | ||
3295 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3296 | ||
3297 | #ifdef CONFIG_PROC_FS | |
3298 | ||
1da177e4 | 3299 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
e4a7b93b | 3300 | __acquires(RCU) |
1f78d9f9 | 3301 | __acquires(&bond->lock) |
1da177e4 LT |
3302 | { |
3303 | struct bonding *bond = seq->private; | |
3304 | loff_t off = 0; | |
3305 | struct slave *slave; | |
3306 | int i; | |
3307 | ||
3308 | /* make sure the bond won't be taken away */ | |
e4a7b93b | 3309 | rcu_read_lock(); |
6603a6f2 | 3310 | read_lock(&bond->lock); |
1da177e4 | 3311 | |
3d632c3f | 3312 | if (*pos == 0) |
1da177e4 | 3313 | return SEQ_START_TOKEN; |
1da177e4 LT |
3314 | |
3315 | bond_for_each_slave(bond, slave, i) { | |
3d632c3f | 3316 | if (++off == *pos) |
1da177e4 | 3317 | return slave; |
1da177e4 LT |
3318 | } |
3319 | ||
3320 | return NULL; | |
3321 | } | |
3322 | ||
3323 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3324 | { | |
3325 | struct bonding *bond = seq->private; | |
3326 | struct slave *slave = v; | |
3327 | ||
3328 | ++*pos; | |
3d632c3f | 3329 | if (v == SEQ_START_TOKEN) |
1da177e4 | 3330 | return bond->first_slave; |
1da177e4 LT |
3331 | |
3332 | slave = slave->next; | |
3333 | ||
3334 | return (slave == bond->first_slave) ? NULL : slave; | |
3335 | } | |
3336 | ||
3337 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
1f78d9f9 | 3338 | __releases(&bond->lock) |
e4a7b93b | 3339 | __releases(RCU) |
1da177e4 LT |
3340 | { |
3341 | struct bonding *bond = seq->private; | |
3342 | ||
6603a6f2 | 3343 | read_unlock(&bond->lock); |
e4a7b93b | 3344 | rcu_read_unlock(); |
1da177e4 LT |
3345 | } |
3346 | ||
3347 | static void bond_info_show_master(struct seq_file *seq) | |
3348 | { | |
3349 | struct bonding *bond = seq->private; | |
3350 | struct slave *curr; | |
4756b02f | 3351 | int i; |
1da177e4 LT |
3352 | |
3353 | read_lock(&bond->curr_slave_lock); | |
3354 | curr = bond->curr_active_slave; | |
3355 | read_unlock(&bond->curr_slave_lock); | |
3356 | ||
dd957c57 | 3357 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3358 | bond_mode_name(bond->params.mode)); |
3359 | ||
dd957c57 JV |
3360 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3361 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3362 | seq_printf(seq, " (fail_over_mac %s)", |
3363 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3364 | |
3365 | seq_printf(seq, "\n"); | |
3366 | ||
c61b75ad MW |
3367 | if (bond->params.mode == BOND_MODE_XOR || |
3368 | bond->params.mode == BOND_MODE_8023AD) { | |
3369 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3370 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3371 | bond->params.xmit_policy); | |
3372 | } | |
3373 | ||
1da177e4 | 3374 | if (USES_PRIMARY(bond->params.mode)) { |
a549952a | 3375 | seq_printf(seq, "Primary Slave: %s", |
0f418b2a MW |
3376 | (bond->primary_slave) ? |
3377 | bond->primary_slave->dev->name : "None"); | |
a549952a JP |
3378 | if (bond->primary_slave) |
3379 | seq_printf(seq, " (primary_reselect %s)", | |
3380 | pri_reselect_tbl[bond->params.primary_reselect].modename); | |
1da177e4 | 3381 | |
a549952a | 3382 | seq_printf(seq, "\nCurrently Active Slave: %s\n", |
1da177e4 LT |
3383 | (curr) ? curr->dev->name : "None"); |
3384 | } | |
3385 | ||
ff59c456 JV |
3386 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3387 | "up" : "down"); | |
1da177e4 LT |
3388 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3389 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3390 | bond->params.updelay * bond->params.miimon); | |
3391 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3392 | bond->params.downdelay * bond->params.miimon); | |
3393 | ||
4756b02f MW |
3394 | |
3395 | /* ARP information */ | |
3d632c3f SH |
3396 | if (bond->params.arp_interval > 0) { |
3397 | int printed = 0; | |
4756b02f MW |
3398 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", |
3399 | bond->params.arp_interval); | |
3400 | ||
3401 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3402 | ||
3d632c3f | 3403 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
4756b02f | 3404 | if (!bond->params.arp_targets[i]) |
5a31bec0 | 3405 | break; |
4756b02f MW |
3406 | if (printed) |
3407 | seq_printf(seq, ","); | |
8cf14e38 | 3408 | seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); |
4756b02f MW |
3409 | printed = 1; |
3410 | } | |
3411 | seq_printf(seq, "\n"); | |
3412 | } | |
3413 | ||
1da177e4 LT |
3414 | if (bond->params.mode == BOND_MODE_8023AD) { |
3415 | struct ad_info ad_info; | |
3416 | ||
3417 | seq_puts(seq, "\n802.3ad info\n"); | |
3418 | seq_printf(seq, "LACP rate: %s\n", | |
3419 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
fd989c83 JV |
3420 | seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", |
3421 | ad_select_tbl[bond->params.ad_select].modename); | |
1da177e4 LT |
3422 | |
3423 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3424 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3425 | bond->dev->name); | |
3426 | } else { | |
3427 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3428 | ||
3429 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3430 | ad_info.aggregator_id); | |
3431 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3432 | ad_info.ports); | |
3433 | seq_printf(seq, "\tActor Key: %d\n", | |
3434 | ad_info.actor_key); | |
3435 | seq_printf(seq, "\tPartner Key: %d\n", | |
3436 | ad_info.partner_key); | |
e174961c JB |
3437 | seq_printf(seq, "\tPartner Mac Address: %pM\n", |
3438 | ad_info.partner_system); | |
1da177e4 LT |
3439 | } |
3440 | } | |
3441 | } | |
3442 | ||
3d632c3f SH |
3443 | static void bond_info_show_slave(struct seq_file *seq, |
3444 | const struct slave *slave) | |
1da177e4 LT |
3445 | { |
3446 | struct bonding *bond = seq->private; | |
3447 | ||
3448 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3449 | seq_printf(seq, "MII Status: %s\n", | |
3450 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
dd53df26 KO |
3451 | seq_printf(seq, "Speed: %d Mbps\n", slave->speed); |
3452 | seq_printf(seq, "Duplex: %s\n", slave->duplex ? "full" : "half"); | |
65509645 | 3453 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3454 | slave->link_failure_count); |
3455 | ||
e174961c | 3456 | seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); |
1da177e4 LT |
3457 | |
3458 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3459 | const struct aggregator *agg | |
3460 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3461 | ||
3d632c3f | 3462 | if (agg) |
1da177e4 LT |
3463 | seq_printf(seq, "Aggregator ID: %d\n", |
3464 | agg->aggregator_identifier); | |
3d632c3f | 3465 | else |
1da177e4 | 3466 | seq_puts(seq, "Aggregator ID: N/A\n"); |
1da177e4 | 3467 | } |
bb1d9123 | 3468 | seq_printf(seq, "Slave queue ID: %d\n", slave->queue_id); |
1da177e4 LT |
3469 | } |
3470 | ||
3471 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3472 | { | |
3473 | if (v == SEQ_START_TOKEN) { | |
3474 | seq_printf(seq, "%s\n", version); | |
3475 | bond_info_show_master(seq); | |
3d632c3f | 3476 | } else |
1da177e4 | 3477 | bond_info_show_slave(seq, v); |
1da177e4 LT |
3478 | |
3479 | return 0; | |
3480 | } | |
3481 | ||
4101dec9 | 3482 | static const struct seq_operations bond_info_seq_ops = { |
1da177e4 LT |
3483 | .start = bond_info_seq_start, |
3484 | .next = bond_info_seq_next, | |
3485 | .stop = bond_info_seq_stop, | |
3486 | .show = bond_info_seq_show, | |
3487 | }; | |
3488 | ||
3489 | static int bond_info_open(struct inode *inode, struct file *file) | |
3490 | { | |
3491 | struct seq_file *seq; | |
3492 | struct proc_dir_entry *proc; | |
3493 | int res; | |
3494 | ||
3495 | res = seq_open(file, &bond_info_seq_ops); | |
3496 | if (!res) { | |
3497 | /* recover the pointer buried in proc_dir_entry data */ | |
3498 | seq = file->private_data; | |
3499 | proc = PDE(inode); | |
3500 | seq->private = proc->data; | |
3501 | } | |
3502 | ||
3503 | return res; | |
3504 | } | |
3505 | ||
d54b1fdb | 3506 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3507 | .owner = THIS_MODULE, |
3508 | .open = bond_info_open, | |
3509 | .read = seq_read, | |
3510 | .llseek = seq_lseek, | |
3511 | .release = seq_release, | |
3512 | }; | |
3513 | ||
38fc0026 | 3514 | static void bond_create_proc_entry(struct bonding *bond) |
1da177e4 LT |
3515 | { |
3516 | struct net_device *bond_dev = bond->dev; | |
ec87fd3b | 3517 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
1da177e4 | 3518 | |
ec87fd3b | 3519 | if (bn->proc_dir) { |
a95609cb | 3520 | bond->proc_entry = proc_create_data(bond_dev->name, |
ec87fd3b | 3521 | S_IRUGO, bn->proc_dir, |
a95609cb | 3522 | &bond_info_fops, bond); |
3d632c3f | 3523 | if (bond->proc_entry == NULL) |
a4aee5c8 JP |
3524 | pr_warning("Warning: Cannot create /proc/net/%s/%s\n", |
3525 | DRV_NAME, bond_dev->name); | |
3d632c3f | 3526 | else |
1da177e4 | 3527 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
1da177e4 | 3528 | } |
1da177e4 LT |
3529 | } |
3530 | ||
3531 | static void bond_remove_proc_entry(struct bonding *bond) | |
3532 | { | |
ec87fd3b EB |
3533 | struct net_device *bond_dev = bond->dev; |
3534 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); | |
3535 | ||
3536 | if (bn->proc_dir && bond->proc_entry) { | |
3537 | remove_proc_entry(bond->proc_file_name, bn->proc_dir); | |
1da177e4 LT |
3538 | memset(bond->proc_file_name, 0, IFNAMSIZ); |
3539 | bond->proc_entry = NULL; | |
3540 | } | |
3541 | } | |
3542 | ||
3543 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3544 | * Caller must hold rtnl_lock. | |
3545 | */ | |
2c8c1e72 | 3546 | static void __net_init bond_create_proc_dir(struct bond_net *bn) |
1da177e4 | 3547 | { |
ec87fd3b EB |
3548 | if (!bn->proc_dir) { |
3549 | bn->proc_dir = proc_mkdir(DRV_NAME, bn->net->proc_net); | |
3550 | if (!bn->proc_dir) | |
a4aee5c8 JP |
3551 | pr_warning("Warning: cannot create /proc/net/%s\n", |
3552 | DRV_NAME); | |
1da177e4 LT |
3553 | } |
3554 | } | |
3555 | ||
3556 | /* Destroy the bonding directory under /proc/net, if empty. | |
3557 | * Caller must hold rtnl_lock. | |
3558 | */ | |
2c8c1e72 | 3559 | static void __net_exit bond_destroy_proc_dir(struct bond_net *bn) |
1da177e4 | 3560 | { |
ec87fd3b EB |
3561 | if (bn->proc_dir) { |
3562 | remove_proc_entry(DRV_NAME, bn->net->proc_net); | |
3563 | bn->proc_dir = NULL; | |
1da177e4 LT |
3564 | } |
3565 | } | |
aee64faf JP |
3566 | |
3567 | #else /* !CONFIG_PROC_FS */ | |
3568 | ||
38fc0026 | 3569 | static void bond_create_proc_entry(struct bonding *bond) |
aee64faf JP |
3570 | { |
3571 | } | |
3572 | ||
3573 | static void bond_remove_proc_entry(struct bonding *bond) | |
3574 | { | |
3575 | } | |
3576 | ||
2c8c1e72 | 3577 | static inline void bond_create_proc_dir(struct bond_net *bn) |
aee64faf JP |
3578 | { |
3579 | } | |
3580 | ||
2c8c1e72 | 3581 | static inline void bond_destroy_proc_dir(struct bond_net *bn) |
aee64faf JP |
3582 | { |
3583 | } | |
3584 | ||
1da177e4 LT |
3585 | #endif /* CONFIG_PROC_FS */ |
3586 | ||
aee64faf | 3587 | |
1da177e4 LT |
3588 | /*-------------------------- netdev event handling --------------------------*/ |
3589 | ||
3590 | /* | |
3591 | * Change device name | |
3592 | */ | |
3593 | static int bond_event_changename(struct bonding *bond) | |
3594 | { | |
1da177e4 LT |
3595 | bond_remove_proc_entry(bond); |
3596 | bond_create_proc_entry(bond); | |
7e083840 | 3597 | |
f073c7ca TI |
3598 | bond_debug_reregister(bond); |
3599 | ||
1da177e4 LT |
3600 | return NOTIFY_DONE; |
3601 | } | |
3602 | ||
3d632c3f SH |
3603 | static int bond_master_netdev_event(unsigned long event, |
3604 | struct net_device *bond_dev) | |
1da177e4 | 3605 | { |
454d7c9b | 3606 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3607 | |
3608 | switch (event) { | |
3609 | case NETDEV_CHANGENAME: | |
3610 | return bond_event_changename(event_bond); | |
1da177e4 LT |
3611 | default: |
3612 | break; | |
3613 | } | |
3614 | ||
3615 | return NOTIFY_DONE; | |
3616 | } | |
3617 | ||
3d632c3f SH |
3618 | static int bond_slave_netdev_event(unsigned long event, |
3619 | struct net_device *slave_dev) | |
1da177e4 LT |
3620 | { |
3621 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3622 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3623 | |
3624 | switch (event) { | |
3625 | case NETDEV_UNREGISTER: | |
3626 | if (bond_dev) { | |
1284cd3a JV |
3627 | if (bond->setup_by_slave) |
3628 | bond_release_and_destroy(bond_dev, slave_dev); | |
3629 | else | |
3630 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3631 | } |
3632 | break; | |
3633 | case NETDEV_CHANGE: | |
17d04500 JV |
3634 | if (bond->params.mode == BOND_MODE_8023AD || bond_is_lb(bond)) { |
3635 | struct slave *slave; | |
3636 | ||
3637 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
3638 | if (slave) { | |
3639 | u16 old_speed = slave->speed; | |
3640 | u16 old_duplex = slave->duplex; | |
3641 | ||
3642 | bond_update_speed_duplex(slave); | |
3643 | ||
3644 | if (bond_is_lb(bond)) | |
3645 | break; | |
3646 | ||
3647 | if (old_speed != slave->speed) | |
3648 | bond_3ad_adapter_speed_changed(slave); | |
3649 | if (old_duplex != slave->duplex) | |
3650 | bond_3ad_adapter_duplex_changed(slave); | |
3651 | } | |
3652 | } | |
3653 | ||
1da177e4 LT |
3654 | break; |
3655 | case NETDEV_DOWN: | |
3656 | /* | |
3657 | * ... Or is it this? | |
3658 | */ | |
3659 | break; | |
3660 | case NETDEV_CHANGEMTU: | |
3661 | /* | |
3662 | * TODO: Should slaves be allowed to | |
3663 | * independently alter their MTU? For | |
3664 | * an active-backup bond, slaves need | |
3665 | * not be the same type of device, so | |
3666 | * MTUs may vary. For other modes, | |
3667 | * slaves arguably should have the | |
3668 | * same MTUs. To do this, we'd need to | |
3669 | * take over the slave's change_mtu | |
3670 | * function for the duration of their | |
3671 | * servitude. | |
3672 | */ | |
3673 | break; | |
3674 | case NETDEV_CHANGENAME: | |
3675 | /* | |
3676 | * TODO: handle changing the primary's name | |
3677 | */ | |
3678 | break; | |
8531c5ff AK |
3679 | case NETDEV_FEAT_CHANGE: |
3680 | bond_compute_features(bond); | |
3681 | break; | |
1da177e4 LT |
3682 | default: |
3683 | break; | |
3684 | } | |
3685 | ||
3686 | return NOTIFY_DONE; | |
3687 | } | |
3688 | ||
3689 | /* | |
3690 | * bond_netdev_event: handle netdev notifier chain events. | |
3691 | * | |
3692 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3693 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3694 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3695 | * dev_probe_lock). | |
3696 | */ | |
3d632c3f SH |
3697 | static int bond_netdev_event(struct notifier_block *this, |
3698 | unsigned long event, void *ptr) | |
1da177e4 LT |
3699 | { |
3700 | struct net_device *event_dev = (struct net_device *)ptr; | |
3701 | ||
5a03cdb7 | 3702 | pr_debug("event_dev: %s, event: %lx\n", |
a4aee5c8 JP |
3703 | event_dev ? event_dev->name : "None", |
3704 | event); | |
1da177e4 | 3705 | |
0b680e75 JV |
3706 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3707 | return NOTIFY_DONE; | |
3708 | ||
1da177e4 | 3709 | if (event_dev->flags & IFF_MASTER) { |
5a03cdb7 | 3710 | pr_debug("IFF_MASTER\n"); |
1da177e4 LT |
3711 | return bond_master_netdev_event(event, event_dev); |
3712 | } | |
3713 | ||
3714 | if (event_dev->flags & IFF_SLAVE) { | |
5a03cdb7 | 3715 | pr_debug("IFF_SLAVE\n"); |
1da177e4 LT |
3716 | return bond_slave_netdev_event(event, event_dev); |
3717 | } | |
3718 | ||
3719 | return NOTIFY_DONE; | |
3720 | } | |
3721 | ||
c3ade5ca JV |
3722 | /* |
3723 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3724 | * | |
3725 | * We keep track of device IPs primarily to use as source addresses in | |
3726 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3727 | * | |
3728 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3729 | */ | |
3730 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3731 | { | |
3732 | struct in_ifaddr *ifa = ptr; | |
3733 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
ec87fd3b | 3734 | struct bond_net *bn = net_generic(dev_net(event_dev), bond_net_id); |
0883beca PE |
3735 | struct bonding *bond; |
3736 | struct vlan_entry *vlan; | |
c3ade5ca | 3737 | |
ec87fd3b | 3738 | list_for_each_entry(bond, &bn->dev_list, bond_list) { |
c3ade5ca JV |
3739 | if (bond->dev == event_dev) { |
3740 | switch (event) { | |
3741 | case NETDEV_UP: | |
3742 | bond->master_ip = ifa->ifa_local; | |
3743 | return NOTIFY_OK; | |
3744 | case NETDEV_DOWN: | |
3745 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3746 | return NOTIFY_OK; | |
3747 | default: | |
3748 | return NOTIFY_DONE; | |
3749 | } | |
3750 | } | |
3751 | ||
0883beca | 3752 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f35188fa JV |
3753 | if (!bond->vlgrp) |
3754 | continue; | |
5c15bdec | 3755 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3756 | if (vlan_dev == event_dev) { |
3757 | switch (event) { | |
3758 | case NETDEV_UP: | |
3759 | vlan->vlan_ip = ifa->ifa_local; | |
3760 | return NOTIFY_OK; | |
3761 | case NETDEV_DOWN: | |
3762 | vlan->vlan_ip = | |
3763 | bond_glean_dev_ip(vlan_dev); | |
3764 | return NOTIFY_OK; | |
3765 | default: | |
3766 | return NOTIFY_DONE; | |
3767 | } | |
3768 | } | |
3769 | } | |
3770 | } | |
3771 | return NOTIFY_DONE; | |
3772 | } | |
3773 | ||
1da177e4 LT |
3774 | static struct notifier_block bond_netdev_notifier = { |
3775 | .notifier_call = bond_netdev_event, | |
3776 | }; | |
3777 | ||
c3ade5ca JV |
3778 | static struct notifier_block bond_inetaddr_notifier = { |
3779 | .notifier_call = bond_inetaddr_event, | |
3780 | }; | |
3781 | ||
1da177e4 LT |
3782 | /*-------------------------- Packet type handling ---------------------------*/ |
3783 | ||
3784 | /* register to receive lacpdus on a bond */ | |
3785 | static void bond_register_lacpdu(struct bonding *bond) | |
3786 | { | |
3787 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3788 | ||
3789 | /* initialize packet type */ | |
3790 | pk_type->type = PKT_TYPE_LACPDU; | |
3791 | pk_type->dev = bond->dev; | |
3792 | pk_type->func = bond_3ad_lacpdu_recv; | |
3793 | ||
3794 | dev_add_pack(pk_type); | |
3795 | } | |
3796 | ||
3797 | /* unregister to receive lacpdus on a bond */ | |
3798 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3799 | { | |
3800 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3801 | } | |
3802 | ||
f5b2b966 JV |
3803 | void bond_register_arp(struct bonding *bond) |
3804 | { | |
3805 | struct packet_type *pt = &bond->arp_mon_pt; | |
3806 | ||
c4f283b1 JV |
3807 | if (pt->type) |
3808 | return; | |
3809 | ||
f5b2b966 | 3810 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3811 | pt->dev = bond->dev; |
f5b2b966 JV |
3812 | pt->func = bond_arp_rcv; |
3813 | dev_add_pack(pt); | |
3814 | } | |
3815 | ||
3816 | void bond_unregister_arp(struct bonding *bond) | |
3817 | { | |
c4f283b1 JV |
3818 | struct packet_type *pt = &bond->arp_mon_pt; |
3819 | ||
3820 | dev_remove_pack(pt); | |
3821 | pt->type = 0; | |
f5b2b966 JV |
3822 | } |
3823 | ||
169a3e66 JV |
3824 | /*---------------------------- Hashing Policies -----------------------------*/ |
3825 | ||
6f6652be JV |
3826 | /* |
3827 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3828 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3829 | */ | |
a361c83c | 3830 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, int count) |
6f6652be JV |
3831 | { |
3832 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3833 | struct iphdr *iph = ip_hdr(skb); | |
3834 | ||
f14c4e4e | 3835 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be | 3836 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
d3da6831 | 3837 | (data->h_dest[5] ^ data->h_source[5])) % count; |
6f6652be JV |
3838 | } |
3839 | ||
d3da6831 | 3840 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
6f6652be JV |
3841 | } |
3842 | ||
169a3e66 | 3843 | /* |
59c51591 | 3844 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3845 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3846 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3847 | */ | |
a361c83c | 3848 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, int count) |
169a3e66 JV |
3849 | { |
3850 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3851 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3852 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3853 | int layer4_xor = 0; |
3854 | ||
f14c4e4e BH |
3855 | if (skb->protocol == htons(ETH_P_IP)) { |
3856 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3857 | (iph->protocol == IPPROTO_TCP || |
3858 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3859 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3860 | } |
3861 | return (layer4_xor ^ | |
3862 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3863 | ||
3864 | } | |
3865 | ||
d3da6831 | 3866 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3867 | } |
3868 | ||
3869 | /* | |
3870 | * Hash for the output device based upon layer 2 data | |
3871 | */ | |
a361c83c | 3872 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, int count) |
169a3e66 JV |
3873 | { |
3874 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3875 | ||
d3da6831 | 3876 | return (data->h_dest[5] ^ data->h_source[5]) % count; |
169a3e66 JV |
3877 | } |
3878 | ||
1da177e4 LT |
3879 | /*-------------------------- Device entry points ----------------------------*/ |
3880 | ||
3881 | static int bond_open(struct net_device *bond_dev) | |
3882 | { | |
454d7c9b | 3883 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3884 | |
3885 | bond->kill_timers = 0; | |
3886 | ||
5a37e8ca FL |
3887 | INIT_DELAYED_WORK(&bond->mcast_work, bond_resend_igmp_join_requests_delayed); |
3888 | ||
58402054 | 3889 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3890 | /* bond_alb_initialize must be called before the timer |
3891 | * is started. | |
3892 | */ | |
3893 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3894 | /* something went wrong - fail the open operation */ | |
b473946a | 3895 | return -ENOMEM; |
1da177e4 LT |
3896 | } |
3897 | ||
1b76b316 JV |
3898 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3899 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3900 | } |
3901 | ||
3902 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3903 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3904 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3905 | } |
3906 | ||
3907 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3908 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3909 | INIT_DELAYED_WORK(&bond->arp_work, | |
3910 | bond_activebackup_arp_mon); | |
3911 | else | |
3912 | INIT_DELAYED_WORK(&bond->arp_work, | |
3913 | bond_loadbalance_arp_mon); | |
3914 | ||
3915 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3916 | if (bond->params.arp_validate) |
3917 | bond_register_arp(bond); | |
1da177e4 LT |
3918 | } |
3919 | ||
3920 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3921 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3922 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3923 | /* register to receive LACPDUs */ |
3924 | bond_register_lacpdu(bond); | |
fd989c83 | 3925 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3926 | } |
3927 | ||
3928 | return 0; | |
3929 | } | |
3930 | ||
3931 | static int bond_close(struct net_device *bond_dev) | |
3932 | { | |
454d7c9b | 3933 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3934 | |
3935 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3936 | /* Unregister the receive of LACPDUs */ | |
3937 | bond_unregister_lacpdu(bond); | |
3938 | } | |
3939 | ||
f5b2b966 JV |
3940 | if (bond->params.arp_validate) |
3941 | bond_unregister_arp(bond); | |
3942 | ||
1da177e4 LT |
3943 | write_lock_bh(&bond->lock); |
3944 | ||
b59f9f74 | 3945 | bond->send_grat_arp = 0; |
305d552a | 3946 | bond->send_unsol_na = 0; |
1da177e4 LT |
3947 | |
3948 | /* signal timers not to re-arm */ | |
3949 | bond->kill_timers = 1; | |
3950 | ||
3951 | write_unlock_bh(&bond->lock); | |
3952 | ||
1da177e4 | 3953 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3954 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3955 | } |
3956 | ||
3957 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3958 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3959 | } |
3960 | ||
3961 | switch (bond->params.mode) { | |
3962 | case BOND_MODE_8023AD: | |
1b76b316 | 3963 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3964 | break; |
3965 | case BOND_MODE_TLB: | |
3966 | case BOND_MODE_ALB: | |
1b76b316 | 3967 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3968 | break; |
3969 | default: | |
3970 | break; | |
3971 | } | |
3972 | ||
5a37e8ca FL |
3973 | if (delayed_work_pending(&bond->mcast_work)) |
3974 | cancel_delayed_work(&bond->mcast_work); | |
1da177e4 | 3975 | |
58402054 | 3976 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3977 | /* Must be called only after all |
3978 | * slaves have been released | |
3979 | */ | |
3980 | bond_alb_deinitialize(bond); | |
3981 | } | |
3982 | ||
3983 | return 0; | |
3984 | } | |
3985 | ||
28172739 ED |
3986 | static struct rtnl_link_stats64 *bond_get_stats(struct net_device *bond_dev, |
3987 | struct rtnl_link_stats64 *stats) | |
1da177e4 | 3988 | { |
454d7c9b | 3989 | struct bonding *bond = netdev_priv(bond_dev); |
28172739 | 3990 | struct rtnl_link_stats64 temp; |
1da177e4 LT |
3991 | struct slave *slave; |
3992 | int i; | |
3993 | ||
28172739 | 3994 | memset(stats, 0, sizeof(*stats)); |
1da177e4 LT |
3995 | |
3996 | read_lock_bh(&bond->lock); | |
3997 | ||
3998 | bond_for_each_slave(bond, slave, i) { | |
be1f3c2c | 3999 | const struct rtnl_link_stats64 *sstats = |
28172739 ED |
4000 | dev_get_stats(slave->dev, &temp); |
4001 | ||
4002 | stats->rx_packets += sstats->rx_packets; | |
4003 | stats->rx_bytes += sstats->rx_bytes; | |
4004 | stats->rx_errors += sstats->rx_errors; | |
4005 | stats->rx_dropped += sstats->rx_dropped; | |
4006 | ||
4007 | stats->tx_packets += sstats->tx_packets; | |
4008 | stats->tx_bytes += sstats->tx_bytes; | |
4009 | stats->tx_errors += sstats->tx_errors; | |
4010 | stats->tx_dropped += sstats->tx_dropped; | |
4011 | ||
4012 | stats->multicast += sstats->multicast; | |
4013 | stats->collisions += sstats->collisions; | |
4014 | ||
4015 | stats->rx_length_errors += sstats->rx_length_errors; | |
4016 | stats->rx_over_errors += sstats->rx_over_errors; | |
4017 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
4018 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
4019 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
4020 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
4021 | ||
4022 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
4023 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
4024 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
4025 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
4026 | stats->tx_window_errors += sstats->tx_window_errors; | |
2439f9eb AG |
4027 | } |
4028 | ||
1da177e4 LT |
4029 | read_unlock_bh(&bond->lock); |
4030 | ||
4031 | return stats; | |
4032 | } | |
4033 | ||
4034 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
4035 | { | |
4036 | struct net_device *slave_dev = NULL; | |
4037 | struct ifbond k_binfo; | |
4038 | struct ifbond __user *u_binfo = NULL; | |
4039 | struct ifslave k_sinfo; | |
4040 | struct ifslave __user *u_sinfo = NULL; | |
4041 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
4042 | int res = 0; |
4043 | ||
a4aee5c8 | 4044 | pr_debug("bond_ioctl: master=%s, cmd=%d\n", bond_dev->name, cmd); |
1da177e4 LT |
4045 | |
4046 | switch (cmd) { | |
1da177e4 LT |
4047 | case SIOCGMIIPHY: |
4048 | mii = if_mii(ifr); | |
3d632c3f | 4049 | if (!mii) |
1da177e4 | 4050 | return -EINVAL; |
3d632c3f | 4051 | |
1da177e4 LT |
4052 | mii->phy_id = 0; |
4053 | /* Fall Through */ | |
4054 | case SIOCGMIIREG: | |
4055 | /* | |
4056 | * We do this again just in case we were called by SIOCGMIIREG | |
4057 | * instead of SIOCGMIIPHY. | |
4058 | */ | |
4059 | mii = if_mii(ifr); | |
3d632c3f | 4060 | if (!mii) |
1da177e4 | 4061 | return -EINVAL; |
3d632c3f | 4062 | |
1da177e4 LT |
4063 | |
4064 | if (mii->reg_num == 1) { | |
454d7c9b | 4065 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4066 | mii->val_out = 0; |
6603a6f2 | 4067 | read_lock(&bond->lock); |
1da177e4 | 4068 | read_lock(&bond->curr_slave_lock); |
3d632c3f | 4069 | if (netif_carrier_ok(bond->dev)) |
1da177e4 | 4070 | mii->val_out = BMSR_LSTATUS; |
3d632c3f | 4071 | |
1da177e4 | 4072 | read_unlock(&bond->curr_slave_lock); |
6603a6f2 | 4073 | read_unlock(&bond->lock); |
1da177e4 LT |
4074 | } |
4075 | ||
4076 | return 0; | |
4077 | case BOND_INFO_QUERY_OLD: | |
4078 | case SIOCBONDINFOQUERY: | |
4079 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
4080 | ||
3d632c3f | 4081 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) |
1da177e4 | 4082 | return -EFAULT; |
1da177e4 LT |
4083 | |
4084 | res = bond_info_query(bond_dev, &k_binfo); | |
3d632c3f SH |
4085 | if (res == 0 && |
4086 | copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) | |
4087 | return -EFAULT; | |
1da177e4 LT |
4088 | |
4089 | return res; | |
4090 | case BOND_SLAVE_INFO_QUERY_OLD: | |
4091 | case SIOCBONDSLAVEINFOQUERY: | |
4092 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
4093 | ||
3d632c3f | 4094 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) |
1da177e4 | 4095 | return -EFAULT; |
1da177e4 LT |
4096 | |
4097 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3d632c3f SH |
4098 | if (res == 0 && |
4099 | copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) | |
4100 | return -EFAULT; | |
1da177e4 LT |
4101 | |
4102 | return res; | |
4103 | default: | |
4104 | /* Go on */ | |
4105 | break; | |
4106 | } | |
4107 | ||
3d632c3f | 4108 | if (!capable(CAP_NET_ADMIN)) |
1da177e4 | 4109 | return -EPERM; |
1da177e4 | 4110 | |
ec87fd3b | 4111 | slave_dev = dev_get_by_name(dev_net(bond_dev), ifr->ifr_slave); |
1da177e4 | 4112 | |
a4aee5c8 | 4113 | pr_debug("slave_dev=%p:\n", slave_dev); |
1da177e4 | 4114 | |
3d632c3f | 4115 | if (!slave_dev) |
1da177e4 | 4116 | res = -ENODEV; |
3d632c3f | 4117 | else { |
a4aee5c8 | 4118 | pr_debug("slave_dev->name=%s:\n", slave_dev->name); |
1da177e4 LT |
4119 | switch (cmd) { |
4120 | case BOND_ENSLAVE_OLD: | |
4121 | case SIOCBONDENSLAVE: | |
4122 | res = bond_enslave(bond_dev, slave_dev); | |
4123 | break; | |
4124 | case BOND_RELEASE_OLD: | |
4125 | case SIOCBONDRELEASE: | |
4126 | res = bond_release(bond_dev, slave_dev); | |
4127 | break; | |
4128 | case BOND_SETHWADDR_OLD: | |
4129 | case SIOCBONDSETHWADDR: | |
4130 | res = bond_sethwaddr(bond_dev, slave_dev); | |
4131 | break; | |
4132 | case BOND_CHANGE_ACTIVE_OLD: | |
4133 | case SIOCBONDCHANGEACTIVE: | |
4134 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
4135 | break; | |
4136 | default: | |
4137 | res = -EOPNOTSUPP; | |
4138 | } | |
4139 | ||
4140 | dev_put(slave_dev); | |
4141 | } | |
4142 | ||
1da177e4 LT |
4143 | return res; |
4144 | } | |
4145 | ||
22bedad3 JP |
4146 | static bool bond_addr_in_mc_list(unsigned char *addr, |
4147 | struct netdev_hw_addr_list *list, | |
4148 | int addrlen) | |
4149 | { | |
4150 | struct netdev_hw_addr *ha; | |
4151 | ||
4152 | netdev_hw_addr_list_for_each(ha, list) | |
4153 | if (!memcmp(ha->addr, addr, addrlen)) | |
4154 | return true; | |
4155 | ||
4156 | return false; | |
4157 | } | |
4158 | ||
1da177e4 LT |
4159 | static void bond_set_multicast_list(struct net_device *bond_dev) |
4160 | { | |
454d7c9b | 4161 | struct bonding *bond = netdev_priv(bond_dev); |
22bedad3 JP |
4162 | struct netdev_hw_addr *ha; |
4163 | bool found; | |
1da177e4 | 4164 | |
1da177e4 LT |
4165 | /* |
4166 | * Do promisc before checking multicast_mode | |
4167 | */ | |
3d632c3f | 4168 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) |
7e1a1ac1 WC |
4169 | /* |
4170 | * FIXME: Need to handle the error when one of the multi-slaves | |
4171 | * encounters error. | |
4172 | */ | |
1da177e4 | 4173 | bond_set_promiscuity(bond, 1); |
1da177e4 | 4174 | |
3d632c3f SH |
4175 | |
4176 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) | |
1da177e4 | 4177 | bond_set_promiscuity(bond, -1); |
3d632c3f | 4178 | |
1da177e4 LT |
4179 | |
4180 | /* set allmulti flag to slaves */ | |
3d632c3f | 4181 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) |
7e1a1ac1 WC |
4182 | /* |
4183 | * FIXME: Need to handle the error when one of the multi-slaves | |
4184 | * encounters error. | |
4185 | */ | |
1da177e4 | 4186 | bond_set_allmulti(bond, 1); |
1da177e4 | 4187 | |
3d632c3f SH |
4188 | |
4189 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) | |
1da177e4 | 4190 | bond_set_allmulti(bond, -1); |
3d632c3f | 4191 | |
1da177e4 | 4192 | |
80ee5ad2 JV |
4193 | read_lock(&bond->lock); |
4194 | ||
1da177e4 LT |
4195 | bond->flags = bond_dev->flags; |
4196 | ||
4197 | /* looking for addresses to add to slaves' mc list */ | |
22bedad3 JP |
4198 | netdev_for_each_mc_addr(ha, bond_dev) { |
4199 | found = bond_addr_in_mc_list(ha->addr, &bond->mc_list, | |
4200 | bond_dev->addr_len); | |
4201 | if (!found) | |
4202 | bond_mc_add(bond, ha->addr); | |
1da177e4 LT |
4203 | } |
4204 | ||
4205 | /* looking for addresses to delete from slaves' list */ | |
22bedad3 JP |
4206 | netdev_hw_addr_list_for_each(ha, &bond->mc_list) { |
4207 | found = bond_addr_in_mc_list(ha->addr, &bond_dev->mc, | |
4208 | bond_dev->addr_len); | |
4209 | if (!found) | |
4210 | bond_mc_del(bond, ha->addr); | |
1da177e4 LT |
4211 | } |
4212 | ||
4213 | /* save master's multicast list */ | |
22bedad3 JP |
4214 | __hw_addr_flush(&bond->mc_list); |
4215 | __hw_addr_add_multiple(&bond->mc_list, &bond_dev->mc, | |
4216 | bond_dev->addr_len, NETDEV_HW_ADDR_T_MULTICAST); | |
1da177e4 | 4217 | |
80ee5ad2 | 4218 | read_unlock(&bond->lock); |
1da177e4 LT |
4219 | } |
4220 | ||
00829823 SH |
4221 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
4222 | { | |
4223 | struct bonding *bond = netdev_priv(dev); | |
4224 | struct slave *slave = bond->first_slave; | |
4225 | ||
4226 | if (slave) { | |
4227 | const struct net_device_ops *slave_ops | |
4228 | = slave->dev->netdev_ops; | |
4229 | if (slave_ops->ndo_neigh_setup) | |
72e2240f | 4230 | return slave_ops->ndo_neigh_setup(slave->dev, parms); |
00829823 SH |
4231 | } |
4232 | return 0; | |
4233 | } | |
4234 | ||
1da177e4 LT |
4235 | /* |
4236 | * Change the MTU of all of a master's slaves to match the master | |
4237 | */ | |
4238 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4239 | { | |
454d7c9b | 4240 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4241 | struct slave *slave, *stop_at; |
4242 | int res = 0; | |
4243 | int i; | |
4244 | ||
5a03cdb7 | 4245 | pr_debug("bond=%p, name=%s, new_mtu=%d\n", bond, |
a4aee5c8 | 4246 | (bond_dev ? bond_dev->name : "None"), new_mtu); |
1da177e4 LT |
4247 | |
4248 | /* Can't hold bond->lock with bh disabled here since | |
4249 | * some base drivers panic. On the other hand we can't | |
4250 | * hold bond->lock without bh disabled because we'll | |
4251 | * deadlock. The only solution is to rely on the fact | |
4252 | * that we're under rtnl_lock here, and the slaves | |
4253 | * list won't change. This doesn't solve the problem | |
4254 | * of setting the slave's MTU while it is | |
4255 | * transmitting, but the assumption is that the base | |
4256 | * driver can handle that. | |
4257 | * | |
4258 | * TODO: figure out a way to safely iterate the slaves | |
4259 | * list, but without holding a lock around the actual | |
4260 | * call to the base driver. | |
4261 | */ | |
4262 | ||
4263 | bond_for_each_slave(bond, slave, i) { | |
a4aee5c8 JP |
4264 | pr_debug("s %p s->p %p c_m %p\n", |
4265 | slave, | |
4266 | slave->prev, | |
4267 | slave->dev->netdev_ops->ndo_change_mtu); | |
e944ef79 | 4268 | |
1da177e4 LT |
4269 | res = dev_set_mtu(slave->dev, new_mtu); |
4270 | ||
4271 | if (res) { | |
4272 | /* If we failed to set the slave's mtu to the new value | |
4273 | * we must abort the operation even in ACTIVE_BACKUP | |
4274 | * mode, because if we allow the backup slaves to have | |
4275 | * different mtu values than the active slave we'll | |
4276 | * need to change their mtu when doing a failover. That | |
4277 | * means changing their mtu from timer context, which | |
4278 | * is probably not a good idea. | |
4279 | */ | |
5a03cdb7 | 4280 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4281 | goto unwind; |
4282 | } | |
4283 | } | |
4284 | ||
4285 | bond_dev->mtu = new_mtu; | |
4286 | ||
4287 | return 0; | |
4288 | ||
4289 | unwind: | |
4290 | /* unwind from head to the slave that failed */ | |
4291 | stop_at = slave; | |
4292 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4293 | int tmp_res; | |
4294 | ||
4295 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4296 | if (tmp_res) { | |
a4aee5c8 JP |
4297 | pr_debug("unwind err %d dev %s\n", |
4298 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4299 | } |
4300 | } | |
4301 | ||
4302 | return res; | |
4303 | } | |
4304 | ||
4305 | /* | |
4306 | * Change HW address | |
4307 | * | |
4308 | * Note that many devices must be down to change the HW address, and | |
4309 | * downing the master releases all slaves. We can make bonds full of | |
4310 | * bonding devices to test this, however. | |
4311 | */ | |
4312 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4313 | { | |
454d7c9b | 4314 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4315 | struct sockaddr *sa = addr, tmp_sa; |
4316 | struct slave *slave, *stop_at; | |
4317 | int res = 0; | |
4318 | int i; | |
4319 | ||
eb7cc59a SH |
4320 | if (bond->params.mode == BOND_MODE_ALB) |
4321 | return bond_alb_set_mac_address(bond_dev, addr); | |
4322 | ||
4323 | ||
a4aee5c8 JP |
4324 | pr_debug("bond=%p, name=%s\n", |
4325 | bond, bond_dev ? bond_dev->name : "None"); | |
1da177e4 | 4326 | |
dd957c57 | 4327 | /* |
3915c1e8 JV |
4328 | * If fail_over_mac is set to active, do nothing and return |
4329 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4330 | */ |
3915c1e8 | 4331 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4332 | return 0; |
2ab82852 | 4333 | |
3d632c3f | 4334 | if (!is_valid_ether_addr(sa->sa_data)) |
1da177e4 | 4335 | return -EADDRNOTAVAIL; |
1da177e4 LT |
4336 | |
4337 | /* Can't hold bond->lock with bh disabled here since | |
4338 | * some base drivers panic. On the other hand we can't | |
4339 | * hold bond->lock without bh disabled because we'll | |
4340 | * deadlock. The only solution is to rely on the fact | |
4341 | * that we're under rtnl_lock here, and the slaves | |
4342 | * list won't change. This doesn't solve the problem | |
4343 | * of setting the slave's hw address while it is | |
4344 | * transmitting, but the assumption is that the base | |
4345 | * driver can handle that. | |
4346 | * | |
4347 | * TODO: figure out a way to safely iterate the slaves | |
4348 | * list, but without holding a lock around the actual | |
4349 | * call to the base driver. | |
4350 | */ | |
4351 | ||
4352 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 4353 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
5a03cdb7 | 4354 | pr_debug("slave %p %s\n", slave, slave->dev->name); |
1da177e4 | 4355 | |
eb7cc59a | 4356 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 | 4357 | res = -EOPNOTSUPP; |
5a03cdb7 | 4358 | pr_debug("EOPNOTSUPP %s\n", slave->dev->name); |
1da177e4 LT |
4359 | goto unwind; |
4360 | } | |
4361 | ||
4362 | res = dev_set_mac_address(slave->dev, addr); | |
4363 | if (res) { | |
4364 | /* TODO: consider downing the slave | |
4365 | * and retry ? | |
4366 | * User should expect communications | |
4367 | * breakage anyway until ARP finish | |
4368 | * updating, so... | |
4369 | */ | |
5a03cdb7 | 4370 | pr_debug("err %d %s\n", res, slave->dev->name); |
1da177e4 LT |
4371 | goto unwind; |
4372 | } | |
4373 | } | |
4374 | ||
4375 | /* success */ | |
4376 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4377 | return 0; | |
4378 | ||
4379 | unwind: | |
4380 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4381 | tmp_sa.sa_family = bond_dev->type; | |
4382 | ||
4383 | /* unwind from head to the slave that failed */ | |
4384 | stop_at = slave; | |
4385 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4386 | int tmp_res; | |
4387 | ||
4388 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4389 | if (tmp_res) { | |
a4aee5c8 JP |
4390 | pr_debug("unwind err %d dev %s\n", |
4391 | tmp_res, slave->dev->name); | |
1da177e4 LT |
4392 | } |
4393 | } | |
4394 | ||
4395 | return res; | |
4396 | } | |
4397 | ||
4398 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4399 | { | |
454d7c9b | 4400 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4401 | struct slave *slave, *start_at; |
cf5f9044 | 4402 | int i, slave_no, res = 1; |
a2fd940f | 4403 | struct iphdr *iph = ip_hdr(skb); |
1da177e4 LT |
4404 | |
4405 | read_lock(&bond->lock); | |
4406 | ||
3d632c3f | 4407 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4408 | goto out; |
cf5f9044 | 4409 | /* |
a2fd940f AG |
4410 | * Start with the curr_active_slave that joined the bond as the |
4411 | * default for sending IGMP traffic. For failover purposes one | |
4412 | * needs to maintain some consistency for the interface that will | |
4413 | * send the join/membership reports. The curr_active_slave found | |
4414 | * will send all of this type of traffic. | |
cf5f9044 | 4415 | */ |
00ae7028 | 4416 | if ((iph->protocol == IPPROTO_IGMP) && |
a2fd940f | 4417 | (skb->protocol == htons(ETH_P_IP))) { |
1da177e4 | 4418 | |
a2fd940f AG |
4419 | read_lock(&bond->curr_slave_lock); |
4420 | slave = bond->curr_active_slave; | |
4421 | read_unlock(&bond->curr_slave_lock); | |
4422 | ||
4423 | if (!slave) | |
4424 | goto out; | |
4425 | } else { | |
4426 | /* | |
4427 | * Concurrent TX may collide on rr_tx_counter; we accept | |
4428 | * that as being rare enough not to justify using an | |
4429 | * atomic op here. | |
4430 | */ | |
4431 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
4432 | ||
4433 | bond_for_each_slave(bond, slave, i) { | |
4434 | slave_no--; | |
4435 | if (slave_no < 0) | |
4436 | break; | |
4437 | } | |
1da177e4 LT |
4438 | } |
4439 | ||
cf5f9044 | 4440 | start_at = slave; |
1da177e4 LT |
4441 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4442 | if (IS_UP(slave->dev) && | |
4443 | (slave->link == BOND_LINK_UP) && | |
4444 | (slave->state == BOND_STATE_ACTIVE)) { | |
4445 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4446 | break; |
4447 | } | |
4448 | } | |
4449 | ||
1da177e4 LT |
4450 | out: |
4451 | if (res) { | |
4452 | /* no suitable interface, frame not sent */ | |
4453 | dev_kfree_skb(skb); | |
4454 | } | |
4455 | read_unlock(&bond->lock); | |
ec634fe3 | 4456 | return NETDEV_TX_OK; |
1da177e4 LT |
4457 | } |
4458 | ||
075897ce | 4459 | |
1da177e4 LT |
4460 | /* |
4461 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4462 | * the bond has a usable interface. | |
4463 | */ | |
4464 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4465 | { | |
454d7c9b | 4466 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4467 | int res = 1; |
4468 | ||
1da177e4 LT |
4469 | read_lock(&bond->lock); |
4470 | read_lock(&bond->curr_slave_lock); | |
4471 | ||
3d632c3f | 4472 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4473 | goto out; |
1da177e4 | 4474 | |
075897ce JL |
4475 | if (!bond->curr_active_slave) |
4476 | goto out; | |
4477 | ||
075897ce JL |
4478 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4479 | ||
1da177e4 | 4480 | out: |
3d632c3f | 4481 | if (res) |
1da177e4 LT |
4482 | /* no suitable interface, frame not sent */ |
4483 | dev_kfree_skb(skb); | |
3d632c3f | 4484 | |
1da177e4 LT |
4485 | read_unlock(&bond->curr_slave_lock); |
4486 | read_unlock(&bond->lock); | |
ec634fe3 | 4487 | return NETDEV_TX_OK; |
1da177e4 LT |
4488 | } |
4489 | ||
4490 | /* | |
169a3e66 JV |
4491 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4492 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4493 | * find the next active slave. | |
1da177e4 LT |
4494 | */ |
4495 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4496 | { | |
454d7c9b | 4497 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4498 | struct slave *slave, *start_at; |
4499 | int slave_no; | |
4500 | int i; | |
4501 | int res = 1; | |
4502 | ||
4503 | read_lock(&bond->lock); | |
4504 | ||
3d632c3f | 4505 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4506 | goto out; |
1da177e4 | 4507 | |
a361c83c | 4508 | slave_no = bond->xmit_hash_policy(skb, bond->slave_cnt); |
1da177e4 LT |
4509 | |
4510 | bond_for_each_slave(bond, slave, i) { | |
4511 | slave_no--; | |
3d632c3f | 4512 | if (slave_no < 0) |
1da177e4 | 4513 | break; |
1da177e4 LT |
4514 | } |
4515 | ||
4516 | start_at = slave; | |
4517 | ||
4518 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4519 | if (IS_UP(slave->dev) && | |
4520 | (slave->link == BOND_LINK_UP) && | |
4521 | (slave->state == BOND_STATE_ACTIVE)) { | |
4522 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4523 | break; | |
4524 | } | |
4525 | } | |
4526 | ||
4527 | out: | |
4528 | if (res) { | |
4529 | /* no suitable interface, frame not sent */ | |
4530 | dev_kfree_skb(skb); | |
4531 | } | |
4532 | read_unlock(&bond->lock); | |
ec634fe3 | 4533 | return NETDEV_TX_OK; |
1da177e4 LT |
4534 | } |
4535 | ||
4536 | /* | |
4537 | * in broadcast mode, we send everything to all usable interfaces. | |
4538 | */ | |
4539 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4540 | { | |
454d7c9b | 4541 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4542 | struct slave *slave, *start_at; |
4543 | struct net_device *tx_dev = NULL; | |
4544 | int i; | |
4545 | int res = 1; | |
4546 | ||
4547 | read_lock(&bond->lock); | |
4548 | ||
3d632c3f | 4549 | if (!BOND_IS_OK(bond)) |
1da177e4 | 4550 | goto out; |
1da177e4 LT |
4551 | |
4552 | read_lock(&bond->curr_slave_lock); | |
4553 | start_at = bond->curr_active_slave; | |
4554 | read_unlock(&bond->curr_slave_lock); | |
4555 | ||
3d632c3f | 4556 | if (!start_at) |
1da177e4 | 4557 | goto out; |
1da177e4 LT |
4558 | |
4559 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4560 | if (IS_UP(slave->dev) && | |
4561 | (slave->link == BOND_LINK_UP) && | |
4562 | (slave->state == BOND_STATE_ACTIVE)) { | |
4563 | if (tx_dev) { | |
4564 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4565 | if (!skb2) { | |
a4aee5c8 | 4566 | pr_err("%s: Error: bond_xmit_broadcast(): skb_clone() failed\n", |
4e0952c7 | 4567 | bond_dev->name); |
1da177e4 LT |
4568 | continue; |
4569 | } | |
4570 | ||
4571 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4572 | if (res) { | |
4573 | dev_kfree_skb(skb2); | |
4574 | continue; | |
4575 | } | |
4576 | } | |
4577 | tx_dev = slave->dev; | |
4578 | } | |
4579 | } | |
4580 | ||
3d632c3f | 4581 | if (tx_dev) |
1da177e4 | 4582 | res = bond_dev_queue_xmit(bond, skb, tx_dev); |
1da177e4 LT |
4583 | |
4584 | out: | |
3d632c3f | 4585 | if (res) |
1da177e4 LT |
4586 | /* no suitable interface, frame not sent */ |
4587 | dev_kfree_skb(skb); | |
3d632c3f | 4588 | |
1da177e4 LT |
4589 | /* frame sent to all suitable interfaces */ |
4590 | read_unlock(&bond->lock); | |
ec634fe3 | 4591 | return NETDEV_TX_OK; |
1da177e4 LT |
4592 | } |
4593 | ||
4594 | /*------------------------- Device initialization ---------------------------*/ | |
4595 | ||
6f6652be JV |
4596 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4597 | { | |
4598 | switch (bond->params.xmit_policy) { | |
4599 | case BOND_XMIT_POLICY_LAYER23: | |
4600 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4601 | break; | |
4602 | case BOND_XMIT_POLICY_LAYER34: | |
4603 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4604 | break; | |
4605 | case BOND_XMIT_POLICY_LAYER2: | |
4606 | default: | |
4607 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4608 | break; | |
4609 | } | |
4610 | } | |
4611 | ||
bb1d9123 AG |
4612 | /* |
4613 | * Lookup the slave that corresponds to a qid | |
4614 | */ | |
4615 | static inline int bond_slave_override(struct bonding *bond, | |
4616 | struct sk_buff *skb) | |
4617 | { | |
4618 | int i, res = 1; | |
4619 | struct slave *slave = NULL; | |
4620 | struct slave *check_slave; | |
4621 | ||
4622 | read_lock(&bond->lock); | |
4623 | ||
4624 | if (!BOND_IS_OK(bond) || !skb->queue_mapping) | |
4625 | goto out; | |
4626 | ||
4627 | /* Find out if any slaves have the same mapping as this skb. */ | |
4628 | bond_for_each_slave(bond, check_slave, i) { | |
4629 | if (check_slave->queue_id == skb->queue_mapping) { | |
4630 | slave = check_slave; | |
4631 | break; | |
4632 | } | |
4633 | } | |
4634 | ||
4635 | /* If the slave isn't UP, use default transmit policy. */ | |
4636 | if (slave && slave->queue_id && IS_UP(slave->dev) && | |
4637 | (slave->link == BOND_LINK_UP)) { | |
4638 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4639 | } | |
4640 | ||
4641 | out: | |
4642 | read_unlock(&bond->lock); | |
4643 | return res; | |
4644 | } | |
4645 | ||
4646 | static u16 bond_select_queue(struct net_device *dev, struct sk_buff *skb) | |
4647 | { | |
4648 | /* | |
4649 | * This helper function exists to help dev_pick_tx get the correct | |
4650 | * destination queue. Using a helper function skips the a call to | |
4651 | * skb_tx_hash and will put the skbs in the queue we expect on their | |
4652 | * way down to the bonding driver. | |
4653 | */ | |
4654 | return skb->queue_mapping; | |
4655 | } | |
4656 | ||
424efe9c | 4657 | static netdev_tx_t bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
00829823 | 4658 | { |
bb1d9123 AG |
4659 | struct bonding *bond = netdev_priv(dev); |
4660 | ||
e843fa50 NH |
4661 | /* |
4662 | * If we risk deadlock from transmitting this in the | |
4663 | * netpoll path, tell netpoll to queue the frame for later tx | |
4664 | */ | |
4665 | if (is_netpoll_tx_blocked(dev)) | |
4666 | return NETDEV_TX_BUSY; | |
4667 | ||
bb1d9123 AG |
4668 | if (TX_QUEUE_OVERRIDE(bond->params.mode)) { |
4669 | if (!bond_slave_override(bond, skb)) | |
4670 | return NETDEV_TX_OK; | |
4671 | } | |
00829823 SH |
4672 | |
4673 | switch (bond->params.mode) { | |
4674 | case BOND_MODE_ROUNDROBIN: | |
4675 | return bond_xmit_roundrobin(skb, dev); | |
4676 | case BOND_MODE_ACTIVEBACKUP: | |
4677 | return bond_xmit_activebackup(skb, dev); | |
4678 | case BOND_MODE_XOR: | |
4679 | return bond_xmit_xor(skb, dev); | |
4680 | case BOND_MODE_BROADCAST: | |
4681 | return bond_xmit_broadcast(skb, dev); | |
4682 | case BOND_MODE_8023AD: | |
4683 | return bond_3ad_xmit_xor(skb, dev); | |
4684 | case BOND_MODE_ALB: | |
4685 | case BOND_MODE_TLB: | |
4686 | return bond_alb_xmit(skb, dev); | |
4687 | default: | |
4688 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4689 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4690 | dev->name, bond->params.mode); | |
00829823 SH |
4691 | WARN_ON_ONCE(1); |
4692 | dev_kfree_skb(skb); | |
4693 | return NETDEV_TX_OK; | |
4694 | } | |
4695 | } | |
4696 | ||
4697 | ||
1da177e4 LT |
4698 | /* |
4699 | * set bond mode specific net device operations | |
4700 | */ | |
a77b5325 | 4701 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4702 | { |
169a3e66 JV |
4703 | struct net_device *bond_dev = bond->dev; |
4704 | ||
1da177e4 LT |
4705 | switch (mode) { |
4706 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4707 | break; |
4708 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4709 | break; |
4710 | case BOND_MODE_XOR: | |
6f6652be | 4711 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4712 | break; |
4713 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4714 | break; |
4715 | case BOND_MODE_8023AD: | |
8f903c70 | 4716 | bond_set_master_3ad_flags(bond); |
6f6652be | 4717 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4718 | break; |
1da177e4 | 4719 | case BOND_MODE_ALB: |
8f903c70 JV |
4720 | bond_set_master_alb_flags(bond); |
4721 | /* FALLTHRU */ | |
4722 | case BOND_MODE_TLB: | |
1da177e4 LT |
4723 | break; |
4724 | default: | |
4725 | /* Should never happen, mode already checked */ | |
a4aee5c8 JP |
4726 | pr_err("%s: Error: Unknown bonding mode %d\n", |
4727 | bond_dev->name, mode); | |
1da177e4 LT |
4728 | break; |
4729 | } | |
4730 | } | |
4731 | ||
217df670 JV |
4732 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4733 | struct ethtool_drvinfo *drvinfo) | |
4734 | { | |
4735 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4736 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4737 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4738 | } | |
4739 | ||
7282d491 | 4740 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4741 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4742 | .get_link = ethtool_op_get_link, |
4743 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4744 | .get_sg = ethtool_op_get_sg, | |
4745 | .get_tso = ethtool_op_get_tso, | |
4746 | .get_ufo = ethtool_op_get_ufo, | |
4747 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4748 | }; |
4749 | ||
eb7cc59a | 4750 | static const struct net_device_ops bond_netdev_ops = { |
181470fc | 4751 | .ndo_init = bond_init, |
9e71626c | 4752 | .ndo_uninit = bond_uninit, |
eb7cc59a SH |
4753 | .ndo_open = bond_open, |
4754 | .ndo_stop = bond_close, | |
00829823 | 4755 | .ndo_start_xmit = bond_start_xmit, |
bb1d9123 | 4756 | .ndo_select_queue = bond_select_queue, |
be1f3c2c | 4757 | .ndo_get_stats64 = bond_get_stats, |
eb7cc59a SH |
4758 | .ndo_do_ioctl = bond_do_ioctl, |
4759 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4760 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4761 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4762 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4763 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4764 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4765 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
f6dc31a8 | 4766 | #ifdef CONFIG_NET_POLL_CONTROLLER |
8a8efa22 | 4767 | .ndo_netpoll_setup = bond_netpoll_setup, |
f6dc31a8 WC |
4768 | .ndo_netpoll_cleanup = bond_netpoll_cleanup, |
4769 | .ndo_poll_controller = bond_poll_controller, | |
4770 | #endif | |
9232ecca JP |
4771 | .ndo_add_slave = bond_enslave, |
4772 | .ndo_del_slave = bond_release, | |
eb7cc59a SH |
4773 | }; |
4774 | ||
9e2e61fb AW |
4775 | static void bond_destructor(struct net_device *bond_dev) |
4776 | { | |
4777 | struct bonding *bond = netdev_priv(bond_dev); | |
4778 | if (bond->wq) | |
4779 | destroy_workqueue(bond->wq); | |
4780 | free_netdev(bond_dev); | |
4781 | } | |
4782 | ||
181470fc | 4783 | static void bond_setup(struct net_device *bond_dev) |
1da177e4 | 4784 | { |
454d7c9b | 4785 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4786 | |
1da177e4 LT |
4787 | /* initialize rwlocks */ |
4788 | rwlock_init(&bond->lock); | |
4789 | rwlock_init(&bond->curr_slave_lock); | |
4790 | ||
d2991f75 | 4791 | bond->params = bonding_defaults; |
1da177e4 LT |
4792 | |
4793 | /* Initialize pointers */ | |
1da177e4 LT |
4794 | bond->dev = bond_dev; |
4795 | INIT_LIST_HEAD(&bond->vlan_list); | |
4796 | ||
4797 | /* Initialize the device entry points */ | |
181470fc | 4798 | ether_setup(bond_dev); |
eb7cc59a | 4799 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4800 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4801 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4802 | |
9e2e61fb | 4803 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4804 | |
4805 | /* Initialize the device options */ | |
4806 | bond_dev->tx_queue_len = 0; | |
4807 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4808 | bond_dev->priv_flags |= IFF_BONDING; |
181470fc SH |
4809 | bond_dev->priv_flags &= ~IFF_XMIT_DST_RELEASE; |
4810 | ||
6cf3f41e JV |
4811 | if (bond->params.arp_interval) |
4812 | bond_dev->priv_flags |= IFF_MASTER_ARPMON; | |
1da177e4 LT |
4813 | |
4814 | /* At first, we block adding VLANs. That's the only way to | |
4815 | * prevent problems that occur when adding VLANs over an | |
4816 | * empty bond. The block will be removed once non-challenged | |
4817 | * slaves are enslaved. | |
4818 | */ | |
4819 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4820 | ||
932ff279 | 4821 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4822 | * transmitting */ |
4823 | bond_dev->features |= NETIF_F_LLTX; | |
4824 | ||
4825 | /* By default, we declare the bond to be fully | |
4826 | * VLAN hardware accelerated capable. Special | |
4827 | * care is taken in the various xmit functions | |
4828 | * when there are slaves that are not hw accel | |
4829 | * capable | |
4830 | */ | |
1da177e4 LT |
4831 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4832 | NETIF_F_HW_VLAN_RX | | |
4833 | NETIF_F_HW_VLAN_FILTER); | |
4834 | ||
e6599c2e ED |
4835 | /* By default, we enable GRO on bonding devices. |
4836 | * Actual support requires lowlevel drivers are GRO ready. | |
4837 | */ | |
4838 | bond_dev->features |= NETIF_F_GRO; | |
1da177e4 LT |
4839 | } |
4840 | ||
fdaea7a9 JV |
4841 | static void bond_work_cancel_all(struct bonding *bond) |
4842 | { | |
4843 | write_lock_bh(&bond->lock); | |
4844 | bond->kill_timers = 1; | |
4845 | write_unlock_bh(&bond->lock); | |
4846 | ||
4847 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4848 | cancel_delayed_work(&bond->mii_work); | |
4849 | ||
4850 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4851 | cancel_delayed_work(&bond->arp_work); | |
4852 | ||
4853 | if (bond->params.mode == BOND_MODE_ALB && | |
4854 | delayed_work_pending(&bond->alb_work)) | |
4855 | cancel_delayed_work(&bond->alb_work); | |
4856 | ||
4857 | if (bond->params.mode == BOND_MODE_8023AD && | |
4858 | delayed_work_pending(&bond->ad_work)) | |
4859 | cancel_delayed_work(&bond->ad_work); | |
5a37e8ca FL |
4860 | |
4861 | if (delayed_work_pending(&bond->mcast_work)) | |
4862 | cancel_delayed_work(&bond->mcast_work); | |
fdaea7a9 JV |
4863 | } |
4864 | ||
c67dfb29 EB |
4865 | /* |
4866 | * Destroy a bonding device. | |
4867 | * Must be under rtnl_lock when this function is called. | |
4868 | */ | |
4869 | static void bond_uninit(struct net_device *bond_dev) | |
a434e43f | 4870 | { |
454d7c9b | 4871 | struct bonding *bond = netdev_priv(bond_dev); |
f35188fa | 4872 | struct vlan_entry *vlan, *tmp; |
a434e43f | 4873 | |
f6dc31a8 WC |
4874 | bond_netpoll_cleanup(bond_dev); |
4875 | ||
c67dfb29 EB |
4876 | /* Release the bonded slaves */ |
4877 | bond_release_all(bond_dev); | |
4878 | ||
a434e43f JV |
4879 | list_del(&bond->bond_list); |
4880 | ||
4881 | bond_work_cancel_all(bond); | |
4882 | ||
a434e43f | 4883 | bond_remove_proc_entry(bond); |
c67dfb29 | 4884 | |
f073c7ca TI |
4885 | bond_debug_unregister(bond); |
4886 | ||
22bedad3 | 4887 | __hw_addr_flush(&bond->mc_list); |
f35188fa JV |
4888 | |
4889 | list_for_each_entry_safe(vlan, tmp, &bond->vlan_list, vlan_list) { | |
4890 | list_del(&vlan->vlan_list); | |
4891 | kfree(vlan); | |
4892 | } | |
a434e43f JV |
4893 | } |
4894 | ||
1da177e4 LT |
4895 | /*------------------------- Module initialization ---------------------------*/ |
4896 | ||
4897 | /* | |
4898 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4899 | * number of the mode or its string name. A bit complicated because |
4900 | * some mode names are substrings of other names, and calls from sysfs | |
4901 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4902 | */ |
325dcf7a | 4903 | int bond_parse_parm(const char *buf, const struct bond_parm_tbl *tbl) |
1da177e4 | 4904 | { |
54b87323 | 4905 | int modeint = -1, i, rv; |
a42e534f | 4906 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4907 | |
a42e534f JV |
4908 | for (p = (char *)buf; *p; p++) |
4909 | if (!(isdigit(*p) || isspace(*p))) | |
4910 | break; | |
4911 | ||
4912 | if (*p) | |
ece95f7f | 4913 | rv = sscanf(buf, "%20s", modestr); |
a42e534f | 4914 | else |
54b87323 | 4915 | rv = sscanf(buf, "%d", &modeint); |
a42e534f JV |
4916 | |
4917 | if (!rv) | |
4918 | return -1; | |
1da177e4 LT |
4919 | |
4920 | for (i = 0; tbl[i].modename; i++) { | |
54b87323 | 4921 | if (modeint == tbl[i].mode) |
ece95f7f JV |
4922 | return tbl[i].mode; |
4923 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4924 | return tbl[i].mode; |
1da177e4 LT |
4925 | } |
4926 | ||
4927 | return -1; | |
4928 | } | |
4929 | ||
4930 | static int bond_check_params(struct bond_params *params) | |
4931 | { | |
a549952a | 4932 | int arp_validate_value, fail_over_mac_value, primary_reselect_value; |
f5b2b966 | 4933 | |
1da177e4 LT |
4934 | /* |
4935 | * Convert string parameters. | |
4936 | */ | |
4937 | if (mode) { | |
4938 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4939 | if (bond_mode == -1) { | |
a4aee5c8 | 4940 | pr_err("Error: Invalid bonding mode \"%s\"\n", |
1da177e4 LT |
4941 | mode == NULL ? "NULL" : mode); |
4942 | return -EINVAL; | |
4943 | } | |
4944 | } | |
4945 | ||
169a3e66 JV |
4946 | if (xmit_hash_policy) { |
4947 | if ((bond_mode != BOND_MODE_XOR) && | |
4948 | (bond_mode != BOND_MODE_8023AD)) { | |
a4aee5c8 | 4949 | pr_info("xmit_hash_policy param is irrelevant in mode %s\n", |
169a3e66 JV |
4950 | bond_mode_name(bond_mode)); |
4951 | } else { | |
4952 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4953 | xmit_hashtype_tbl); | |
4954 | if (xmit_hashtype == -1) { | |
a4aee5c8 | 4955 | pr_err("Error: Invalid xmit_hash_policy \"%s\"\n", |
3d632c3f | 4956 | xmit_hash_policy == NULL ? "NULL" : |
169a3e66 JV |
4957 | xmit_hash_policy); |
4958 | return -EINVAL; | |
4959 | } | |
4960 | } | |
4961 | } | |
4962 | ||
1da177e4 LT |
4963 | if (lacp_rate) { |
4964 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 JP |
4965 | pr_info("lacp_rate param is irrelevant in mode %s\n", |
4966 | bond_mode_name(bond_mode)); | |
1da177e4 LT |
4967 | } else { |
4968 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4969 | if (lacp_fast == -1) { | |
a4aee5c8 | 4970 | pr_err("Error: Invalid lacp rate \"%s\"\n", |
1da177e4 LT |
4971 | lacp_rate == NULL ? "NULL" : lacp_rate); |
4972 | return -EINVAL; | |
4973 | } | |
4974 | } | |
4975 | } | |
4976 | ||
fd989c83 JV |
4977 | if (ad_select) { |
4978 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4979 | if (params->ad_select == -1) { | |
a4aee5c8 | 4980 | pr_err("Error: Invalid ad_select \"%s\"\n", |
fd989c83 JV |
4981 | ad_select == NULL ? "NULL" : ad_select); |
4982 | return -EINVAL; | |
4983 | } | |
4984 | ||
4985 | if (bond_mode != BOND_MODE_8023AD) { | |
a4aee5c8 | 4986 | pr_warning("ad_select param only affects 802.3ad mode\n"); |
fd989c83 JV |
4987 | } |
4988 | } else { | |
4989 | params->ad_select = BOND_AD_STABLE; | |
4990 | } | |
4991 | ||
f5841306 | 4992 | if (max_bonds < 0) { |
a4aee5c8 JP |
4993 | pr_warning("Warning: max_bonds (%d) not in range %d-%d, so it was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
4994 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); | |
1da177e4 LT |
4995 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4996 | } | |
4997 | ||
4998 | if (miimon < 0) { | |
a4aee5c8 JP |
4999 | pr_warning("Warning: miimon module parameter (%d), not in range 0-%d, so it was reset to %d\n", |
5000 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
1da177e4 LT |
5001 | miimon = BOND_LINK_MON_INTERV; |
5002 | } | |
5003 | ||
5004 | if (updelay < 0) { | |
a4aee5c8 JP |
5005 | pr_warning("Warning: updelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
5006 | updelay, INT_MAX); | |
1da177e4 LT |
5007 | updelay = 0; |
5008 | } | |
5009 | ||
5010 | if (downdelay < 0) { | |
a4aee5c8 JP |
5011 | pr_warning("Warning: downdelay module parameter (%d), not in range 0-%d, so it was reset to 0\n", |
5012 | downdelay, INT_MAX); | |
1da177e4 LT |
5013 | downdelay = 0; |
5014 | } | |
5015 | ||
5016 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
a4aee5c8 JP |
5017 | pr_warning("Warning: use_carrier module parameter (%d), not of valid value (0/1), so it was set to 1\n", |
5018 | use_carrier); | |
1da177e4 LT |
5019 | use_carrier = 1; |
5020 | } | |
5021 | ||
7893b249 | 5022 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
2381a55c | 5023 | pr_warning("Warning: num_grat_arp (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 5024 | num_grat_arp); |
7893b249 MS |
5025 | num_grat_arp = 1; |
5026 | } | |
5027 | ||
305d552a | 5028 | if (num_unsol_na < 0 || num_unsol_na > 255) { |
2381a55c | 5029 | pr_warning("Warning: num_unsol_na (%d) not in range 0-255 so it was reset to 1\n", |
a4aee5c8 | 5030 | num_unsol_na); |
305d552a BH |
5031 | num_unsol_na = 1; |
5032 | } | |
5033 | ||
1da177e4 LT |
5034 | /* reset values for 802.3ad */ |
5035 | if (bond_mode == BOND_MODE_8023AD) { | |
5036 | if (!miimon) { | |
a4aee5c8 | 5037 | 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 | 5038 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
5039 | miimon = 100; |
5040 | } | |
5041 | } | |
5042 | ||
bb1d9123 AG |
5043 | if (tx_queues < 1 || tx_queues > 255) { |
5044 | pr_warning("Warning: tx_queues (%d) should be between " | |
5045 | "1 and 255, resetting to %d\n", | |
5046 | tx_queues, BOND_DEFAULT_TX_QUEUES); | |
5047 | tx_queues = BOND_DEFAULT_TX_QUEUES; | |
5048 | } | |
5049 | ||
ebd8e497 AG |
5050 | if ((all_slaves_active != 0) && (all_slaves_active != 1)) { |
5051 | pr_warning("Warning: all_slaves_active module parameter (%d), " | |
5052 | "not of valid value (0/1), so it was set to " | |
5053 | "0\n", all_slaves_active); | |
5054 | all_slaves_active = 0; | |
5055 | } | |
5056 | ||
c2952c31 FL |
5057 | if (resend_igmp < 0 || resend_igmp > 255) { |
5058 | pr_warning("Warning: resend_igmp (%d) should be between " | |
5059 | "0 and 255, resetting to %d\n", | |
5060 | resend_igmp, BOND_DEFAULT_RESEND_IGMP); | |
5061 | resend_igmp = BOND_DEFAULT_RESEND_IGMP; | |
5062 | } | |
5063 | ||
1da177e4 LT |
5064 | /* reset values for TLB/ALB */ |
5065 | if ((bond_mode == BOND_MODE_TLB) || | |
5066 | (bond_mode == BOND_MODE_ALB)) { | |
5067 | if (!miimon) { | |
a4aee5c8 | 5068 | 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 | 5069 | pr_warning("Forcing miimon to 100msec\n"); |
1da177e4 LT |
5070 | miimon = 100; |
5071 | } | |
5072 | } | |
5073 | ||
5074 | if (bond_mode == BOND_MODE_ALB) { | |
a4aee5c8 JP |
5075 | 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", |
5076 | updelay); | |
1da177e4 LT |
5077 | } |
5078 | ||
5079 | if (!miimon) { | |
5080 | if (updelay || downdelay) { | |
5081 | /* just warn the user the up/down delay will have | |
5082 | * no effect since miimon is zero... | |
5083 | */ | |
a4aee5c8 JP |
5084 | 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", |
5085 | updelay, downdelay); | |
1da177e4 LT |
5086 | } |
5087 | } else { | |
5088 | /* don't allow arp monitoring */ | |
5089 | if (arp_interval) { | |
a4aee5c8 JP |
5090 | pr_warning("Warning: miimon (%d) and arp_interval (%d) can't be used simultaneously, disabling ARP monitoring\n", |
5091 | miimon, arp_interval); | |
1da177e4 LT |
5092 | arp_interval = 0; |
5093 | } | |
5094 | ||
5095 | if ((updelay % miimon) != 0) { | |
a4aee5c8 JP |
5096 | pr_warning("Warning: updelay (%d) is not a multiple of miimon (%d), updelay rounded to %d ms\n", |
5097 | updelay, miimon, | |
5098 | (updelay / miimon) * miimon); | |
1da177e4 LT |
5099 | } |
5100 | ||
5101 | updelay /= miimon; | |
5102 | ||
5103 | if ((downdelay % miimon) != 0) { | |
a4aee5c8 JP |
5104 | pr_warning("Warning: downdelay (%d) is not a multiple of miimon (%d), downdelay rounded to %d ms\n", |
5105 | downdelay, miimon, | |
5106 | (downdelay / miimon) * miimon); | |
1da177e4 LT |
5107 | } |
5108 | ||
5109 | downdelay /= miimon; | |
5110 | } | |
5111 | ||
5112 | if (arp_interval < 0) { | |
a4aee5c8 JP |
5113 | pr_warning("Warning: arp_interval module parameter (%d) , not in range 0-%d, so it was reset to %d\n", |
5114 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
1da177e4 LT |
5115 | arp_interval = BOND_LINK_ARP_INTERV; |
5116 | } | |
5117 | ||
5118 | for (arp_ip_count = 0; | |
5119 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
5120 | arp_ip_count++) { | |
5121 | /* not complete check, but should be good enough to | |
5122 | catch mistakes */ | |
5123 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
a4aee5c8 JP |
5124 | pr_warning("Warning: bad arp_ip_target module parameter (%s), ARP monitoring will not be performed\n", |
5125 | arp_ip_target[arp_ip_count]); | |
1da177e4 LT |
5126 | arp_interval = 0; |
5127 | } else { | |
d3bb52b0 | 5128 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
5129 | arp_target[arp_ip_count] = ip; |
5130 | } | |
5131 | } | |
5132 | ||
5133 | if (arp_interval && !arp_ip_count) { | |
5134 | /* don't allow arping if no arp_ip_target given... */ | |
a4aee5c8 JP |
5135 | pr_warning("Warning: arp_interval module parameter (%d) specified without providing an arp_ip_target parameter, arp_interval was reset to 0\n", |
5136 | arp_interval); | |
1da177e4 LT |
5137 | arp_interval = 0; |
5138 | } | |
5139 | ||
f5b2b966 JV |
5140 | if (arp_validate) { |
5141 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
a4aee5c8 | 5142 | pr_err("arp_validate only supported in active-backup mode\n"); |
f5b2b966 JV |
5143 | return -EINVAL; |
5144 | } | |
5145 | if (!arp_interval) { | |
a4aee5c8 | 5146 | pr_err("arp_validate requires arp_interval\n"); |
f5b2b966 JV |
5147 | return -EINVAL; |
5148 | } | |
5149 | ||
5150 | arp_validate_value = bond_parse_parm(arp_validate, | |
5151 | arp_validate_tbl); | |
5152 | if (arp_validate_value == -1) { | |
a4aee5c8 | 5153 | pr_err("Error: invalid arp_validate \"%s\"\n", |
f5b2b966 JV |
5154 | arp_validate == NULL ? "NULL" : arp_validate); |
5155 | return -EINVAL; | |
5156 | } | |
5157 | } else | |
5158 | arp_validate_value = 0; | |
5159 | ||
1da177e4 | 5160 | if (miimon) { |
a4aee5c8 | 5161 | pr_info("MII link monitoring set to %d ms\n", miimon); |
1da177e4 LT |
5162 | } else if (arp_interval) { |
5163 | int i; | |
5164 | ||
a4aee5c8 JP |
5165 | pr_info("ARP monitoring set to %d ms, validate %s, with %d target(s):", |
5166 | arp_interval, | |
5167 | arp_validate_tbl[arp_validate_value].modename, | |
5168 | arp_ip_count); | |
1da177e4 LT |
5169 | |
5170 | for (i = 0; i < arp_ip_count; i++) | |
e5e2a8fd | 5171 | pr_info(" %s", arp_ip_target[i]); |
1da177e4 | 5172 | |
e5e2a8fd | 5173 | pr_info("\n"); |
1da177e4 | 5174 | |
b8a9787e | 5175 | } else if (max_bonds) { |
1da177e4 LT |
5176 | /* miimon and arp_interval not set, we need one so things |
5177 | * work as expected, see bonding.txt for details | |
5178 | */ | |
a4aee5c8 | 5179 | pr_warning("Warning: either miimon or arp_interval and arp_ip_target module parameters must be specified, otherwise bonding will not detect link failures! see bonding.txt for details.\n"); |
1da177e4 LT |
5180 | } |
5181 | ||
5182 | if (primary && !USES_PRIMARY(bond_mode)) { | |
5183 | /* currently, using a primary only makes sense | |
5184 | * in active backup, TLB or ALB modes | |
5185 | */ | |
a4aee5c8 JP |
5186 | pr_warning("Warning: %s primary device specified but has no effect in %s mode\n", |
5187 | primary, bond_mode_name(bond_mode)); | |
1da177e4 LT |
5188 | primary = NULL; |
5189 | } | |
5190 | ||
a549952a JP |
5191 | if (primary && primary_reselect) { |
5192 | primary_reselect_value = bond_parse_parm(primary_reselect, | |
5193 | pri_reselect_tbl); | |
5194 | if (primary_reselect_value == -1) { | |
a4aee5c8 | 5195 | pr_err("Error: Invalid primary_reselect \"%s\"\n", |
a549952a JP |
5196 | primary_reselect == |
5197 | NULL ? "NULL" : primary_reselect); | |
5198 | return -EINVAL; | |
5199 | } | |
5200 | } else { | |
5201 | primary_reselect_value = BOND_PRI_RESELECT_ALWAYS; | |
5202 | } | |
5203 | ||
3915c1e8 JV |
5204 | if (fail_over_mac) { |
5205 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
5206 | fail_over_mac_tbl); | |
5207 | if (fail_over_mac_value == -1) { | |
a4aee5c8 | 5208 | pr_err("Error: invalid fail_over_mac \"%s\"\n", |
3915c1e8 JV |
5209 | arp_validate == NULL ? "NULL" : arp_validate); |
5210 | return -EINVAL; | |
5211 | } | |
5212 | ||
5213 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
a4aee5c8 | 5214 | pr_warning("Warning: fail_over_mac only affects active-backup mode.\n"); |
3915c1e8 JV |
5215 | } else { |
5216 | fail_over_mac_value = BOND_FOM_NONE; | |
5217 | } | |
dd957c57 | 5218 | |
1da177e4 LT |
5219 | /* fill params struct with the proper values */ |
5220 | params->mode = bond_mode; | |
169a3e66 | 5221 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 5222 | params->miimon = miimon; |
7893b249 | 5223 | params->num_grat_arp = num_grat_arp; |
305d552a | 5224 | params->num_unsol_na = num_unsol_na; |
1da177e4 | 5225 | params->arp_interval = arp_interval; |
f5b2b966 | 5226 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
5227 | params->updelay = updelay; |
5228 | params->downdelay = downdelay; | |
5229 | params->use_carrier = use_carrier; | |
5230 | params->lacp_fast = lacp_fast; | |
5231 | params->primary[0] = 0; | |
a549952a | 5232 | params->primary_reselect = primary_reselect_value; |
3915c1e8 | 5233 | params->fail_over_mac = fail_over_mac_value; |
bb1d9123 | 5234 | params->tx_queues = tx_queues; |
ebd8e497 | 5235 | params->all_slaves_active = all_slaves_active; |
c2952c31 | 5236 | params->resend_igmp = resend_igmp; |
1da177e4 LT |
5237 | |
5238 | if (primary) { | |
5239 | strncpy(params->primary, primary, IFNAMSIZ); | |
5240 | params->primary[IFNAMSIZ - 1] = 0; | |
5241 | } | |
5242 | ||
5243 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
5244 | ||
5245 | return 0; | |
5246 | } | |
5247 | ||
0daa2303 | 5248 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 5249 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 5250 | |
e8a0464c DM |
5251 | static void bond_set_lockdep_class_one(struct net_device *dev, |
5252 | struct netdev_queue *txq, | |
5253 | void *_unused) | |
c773e847 DM |
5254 | { |
5255 | lockdep_set_class(&txq->_xmit_lock, | |
5256 | &bonding_netdev_xmit_lock_key); | |
5257 | } | |
5258 | ||
5259 | static void bond_set_lockdep_class(struct net_device *dev) | |
5260 | { | |
cf508b12 DM |
5261 | lockdep_set_class(&dev->addr_list_lock, |
5262 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 5263 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
5264 | } |
5265 | ||
181470fc SH |
5266 | /* |
5267 | * Called from registration process | |
5268 | */ | |
5269 | static int bond_init(struct net_device *bond_dev) | |
5270 | { | |
5271 | struct bonding *bond = netdev_priv(bond_dev); | |
ec87fd3b | 5272 | struct bond_net *bn = net_generic(dev_net(bond_dev), bond_net_id); |
181470fc SH |
5273 | |
5274 | pr_debug("Begin bond_init for %s\n", bond_dev->name); | |
5275 | ||
5276 | bond->wq = create_singlethread_workqueue(bond_dev->name); | |
5277 | if (!bond->wq) | |
5278 | return -ENOMEM; | |
5279 | ||
5280 | bond_set_lockdep_class(bond_dev); | |
5281 | ||
5282 | netif_carrier_off(bond_dev); | |
5283 | ||
5284 | bond_create_proc_entry(bond); | |
ec87fd3b | 5285 | list_add_tail(&bond->bond_list, &bn->dev_list); |
181470fc | 5286 | |
6151b3d4 | 5287 | bond_prepare_sysfs_group(bond); |
22bedad3 | 5288 | |
f073c7ca TI |
5289 | bond_debug_register(bond); |
5290 | ||
22bedad3 | 5291 | __hw_addr_init(&bond->mc_list); |
181470fc SH |
5292 | return 0; |
5293 | } | |
5294 | ||
88ead977 EB |
5295 | static int bond_validate(struct nlattr *tb[], struct nlattr *data[]) |
5296 | { | |
5297 | if (tb[IFLA_ADDRESS]) { | |
5298 | if (nla_len(tb[IFLA_ADDRESS]) != ETH_ALEN) | |
5299 | return -EINVAL; | |
5300 | if (!is_valid_ether_addr(nla_data(tb[IFLA_ADDRESS]))) | |
5301 | return -EADDRNOTAVAIL; | |
5302 | } | |
5303 | return 0; | |
5304 | } | |
5305 | ||
5306 | static struct rtnl_link_ops bond_link_ops __read_mostly = { | |
5307 | .kind = "bond", | |
6639104b | 5308 | .priv_size = sizeof(struct bonding), |
88ead977 EB |
5309 | .setup = bond_setup, |
5310 | .validate = bond_validate, | |
5311 | }; | |
5312 | ||
dfe60397 | 5313 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 5314 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
5315 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
5316 | * set up our sysfs entries. | |
5317 | */ | |
ec87fd3b | 5318 | int bond_create(struct net *net, const char *name) |
dfe60397 MW |
5319 | { |
5320 | struct net_device *bond_dev; | |
5321 | int res; | |
5322 | ||
5323 | rtnl_lock(); | |
027ea041 | 5324 | |
bb1d9123 AG |
5325 | bond_dev = alloc_netdev_mq(sizeof(struct bonding), name ? name : "", |
5326 | bond_setup, tx_queues); | |
dfe60397 | 5327 | if (!bond_dev) { |
a4aee5c8 | 5328 | pr_err("%s: eek! can't alloc netdev!\n", name); |
9e2e61fb AW |
5329 | rtnl_unlock(); |
5330 | return -ENOMEM; | |
dfe60397 MW |
5331 | } |
5332 | ||
ec87fd3b | 5333 | dev_net_set(bond_dev, net); |
88ead977 EB |
5334 | bond_dev->rtnl_link_ops = &bond_link_ops; |
5335 | ||
e4b91c48 JV |
5336 | if (!name) { |
5337 | res = dev_alloc_name(bond_dev, "bond%d"); | |
5338 | if (res < 0) | |
9e2e61fb | 5339 | goto out; |
27e6f065 NH |
5340 | } else { |
5341 | /* | |
5342 | * If we're given a name to register | |
5343 | * we need to ensure that its not already | |
5344 | * registered | |
5345 | */ | |
5346 | res = -EEXIST; | |
5347 | if (__dev_get_by_name(net, name) != NULL) | |
5348 | goto out; | |
e4b91c48 JV |
5349 | } |
5350 | ||
dfe60397 | 5351 | res = register_netdevice(bond_dev); |
0daa2303 | 5352 | |
30c15ba9 | 5353 | out: |
7e083840 | 5354 | rtnl_unlock(); |
9e2e61fb AW |
5355 | if (res < 0) |
5356 | bond_destructor(bond_dev); | |
30c15ba9 | 5357 | return res; |
dfe60397 MW |
5358 | } |
5359 | ||
2c8c1e72 | 5360 | static int __net_init bond_net_init(struct net *net) |
ec87fd3b | 5361 | { |
15449745 | 5362 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
5363 | |
5364 | bn->net = net; | |
5365 | INIT_LIST_HEAD(&bn->dev_list); | |
5366 | ||
ec87fd3b | 5367 | bond_create_proc_dir(bn); |
15449745 EB |
5368 | |
5369 | return 0; | |
ec87fd3b EB |
5370 | } |
5371 | ||
2c8c1e72 | 5372 | static void __net_exit bond_net_exit(struct net *net) |
ec87fd3b | 5373 | { |
15449745 | 5374 | struct bond_net *bn = net_generic(net, bond_net_id); |
ec87fd3b EB |
5375 | |
5376 | bond_destroy_proc_dir(bn); | |
ec87fd3b EB |
5377 | } |
5378 | ||
5379 | static struct pernet_operations bond_net_ops = { | |
5380 | .init = bond_net_init, | |
5381 | .exit = bond_net_exit, | |
15449745 EB |
5382 | .id = &bond_net_id, |
5383 | .size = sizeof(struct bond_net), | |
ec87fd3b EB |
5384 | }; |
5385 | ||
1da177e4 LT |
5386 | static int __init bonding_init(void) |
5387 | { | |
1da177e4 LT |
5388 | int i; |
5389 | int res; | |
5390 | ||
3d632c3f | 5391 | pr_info("%s", version); |
1da177e4 | 5392 | |
dfe60397 | 5393 | res = bond_check_params(&bonding_defaults); |
3d632c3f | 5394 | if (res) |
dfe60397 | 5395 | goto out; |
1da177e4 | 5396 | |
15449745 | 5397 | res = register_pernet_subsys(&bond_net_ops); |
ec87fd3b EB |
5398 | if (res) |
5399 | goto out; | |
027ea041 | 5400 | |
88ead977 EB |
5401 | res = rtnl_link_register(&bond_link_ops); |
5402 | if (res) | |
6639104b | 5403 | goto err_link; |
88ead977 | 5404 | |
f073c7ca TI |
5405 | bond_create_debugfs(); |
5406 | ||
1da177e4 | 5407 | for (i = 0; i < max_bonds; i++) { |
ec87fd3b | 5408 | res = bond_create(&init_net, NULL); |
dfe60397 MW |
5409 | if (res) |
5410 | goto err; | |
1da177e4 LT |
5411 | } |
5412 | ||
b76cdba9 MW |
5413 | res = bond_create_sysfs(); |
5414 | if (res) | |
5415 | goto err; | |
5416 | ||
1da177e4 | 5417 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5418 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5419 | bond_register_ipv6_notifier(); |
dfe60397 | 5420 | out: |
1da177e4 | 5421 | return res; |
88ead977 EB |
5422 | err: |
5423 | rtnl_link_unregister(&bond_link_ops); | |
6639104b | 5424 | err_link: |
15449745 | 5425 | unregister_pernet_subsys(&bond_net_ops); |
88ead977 | 5426 | goto out; |
dfe60397 | 5427 | |
1da177e4 LT |
5428 | } |
5429 | ||
5430 | static void __exit bonding_exit(void) | |
5431 | { | |
5432 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5433 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5434 | bond_unregister_ipv6_notifier(); |
1da177e4 | 5435 | |
ae68c398 | 5436 | bond_destroy_sysfs(); |
f073c7ca | 5437 | bond_destroy_debugfs(); |
ae68c398 | 5438 | |
88ead977 | 5439 | rtnl_link_unregister(&bond_link_ops); |
15449745 | 5440 | unregister_pernet_subsys(&bond_net_ops); |
e843fa50 NH |
5441 | |
5442 | #ifdef CONFIG_NET_POLL_CONTROLLER | |
fb4fa76a NH |
5443 | /* |
5444 | * Make sure we don't have an imbalance on our netpoll blocking | |
5445 | */ | |
5446 | WARN_ON(atomic_read(&netpoll_block_tx)); | |
e843fa50 | 5447 | #endif |
1da177e4 LT |
5448 | } |
5449 | ||
5450 | module_init(bonding_init); | |
5451 | module_exit(bonding_exit); | |
5452 | MODULE_LICENSE("GPL"); | |
5453 | MODULE_VERSION(DRV_VERSION); | |
5454 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5455 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
88ead977 | 5456 | MODULE_ALIAS_RTNL_LINK("bond"); |