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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
34 | //#define BONDING_DEBUG 1 | |
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> | |
56 | #include <asm/system.h> | |
57 | #include <asm/io.h> | |
58 | #include <asm/dma.h> | |
59 | #include <asm/uaccess.h> | |
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> |
c3ade5ca | 78 | #include <net/route.h> |
457c4cbc | 79 | #include <net/net_namespace.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
87 | #define BOND_LINK_MON_INTERV 0 | |
88 | #define BOND_LINK_ARP_INTERV 0 | |
89 | ||
90 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
7893b249 | 91 | static int num_grat_arp = 1; |
305d552a | 92 | static int num_unsol_na = 1; |
1da177e4 LT |
93 | static int miimon = BOND_LINK_MON_INTERV; |
94 | static int updelay = 0; | |
95 | static int downdelay = 0; | |
96 | static int use_carrier = 1; | |
97 | static char *mode = NULL; | |
98 | static char *primary = NULL; | |
99 | static char *lacp_rate = NULL; | |
fd989c83 | 100 | static char *ad_select = NULL; |
169a3e66 | 101 | static char *xmit_hash_policy = NULL; |
1da177e4 LT |
102 | static int arp_interval = BOND_LINK_ARP_INTERV; |
103 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
f5b2b966 | 104 | static char *arp_validate = NULL; |
3915c1e8 | 105 | static char *fail_over_mac = NULL; |
12479f9a | 106 | struct bond_params bonding_defaults; |
1da177e4 LT |
107 | |
108 | module_param(max_bonds, int, 0); | |
109 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
7893b249 MS |
110 | module_param(num_grat_arp, int, 0644); |
111 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
305d552a BH |
112 | module_param(num_unsol_na, int, 0644); |
113 | MODULE_PARM_DESC(num_unsol_na, "Number of unsolicited IPv6 Neighbor Advertisements packets to send on failover event"); | |
1da177e4 LT |
114 | module_param(miimon, int, 0); |
115 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
116 | module_param(updelay, int, 0); | |
117 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
118 | module_param(downdelay, int, 0); | |
2ac47660 MW |
119 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
120 | "in milliseconds"); | |
1da177e4 | 121 | module_param(use_carrier, int, 0); |
2ac47660 MW |
122 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
123 | "0 for off, 1 for on (default)"); | |
1da177e4 | 124 | module_param(mode, charp, 0); |
2ac47660 MW |
125 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
126 | "1 for active-backup, 2 for balance-xor, " | |
127 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
128 | "6 for balance-alb"); | |
1da177e4 LT |
129 | module_param(primary, charp, 0); |
130 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
131 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
132 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
133 | "(slow/fast)"); | |
fd989c83 JV |
134 | module_param(ad_select, charp, 0); |
135 | MODULE_PARM_DESC(ad_select, "803.ad aggregation selection logic: stable (0, default), bandwidth (1), count (2)"); | |
169a3e66 | 136 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
137 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
138 | ", 1 for layer 3+4"); | |
1da177e4 LT |
139 | module_param(arp_interval, int, 0); |
140 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
141 | module_param_array(arp_ip_target, charp, NULL, 0); | |
142 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
143 | module_param(arp_validate, charp, 0); |
144 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
145 | module_param(fail_over_mac, charp, 0); |
146 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
1da177e4 LT |
147 | |
148 | /*----------------------------- Global variables ----------------------------*/ | |
149 | ||
f71e1309 | 150 | static const char * const version = |
1da177e4 LT |
151 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
152 | ||
12479f9a | 153 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
154 | |
155 | #ifdef CONFIG_PROC_FS | |
156 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
157 | #endif | |
158 | ||
b76cdba9 | 159 | extern struct rw_semaphore bonding_rwsem; |
d3bb52b0 | 160 | static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; |
1da177e4 | 161 | static int arp_ip_count = 0; |
1da177e4 | 162 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
169a3e66 | 163 | static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; |
1da177e4 | 164 | static int lacp_fast = 0; |
217df670 | 165 | |
1da177e4 | 166 | |
12479f9a | 167 | struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
168 | { "slow", AD_LACP_SLOW}, |
169 | { "fast", AD_LACP_FAST}, | |
170 | { NULL, -1}, | |
171 | }; | |
172 | ||
12479f9a | 173 | struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
174 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
175 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
176 | { "balance-xor", BOND_MODE_XOR}, | |
177 | { "broadcast", BOND_MODE_BROADCAST}, | |
178 | { "802.3ad", BOND_MODE_8023AD}, | |
179 | { "balance-tlb", BOND_MODE_TLB}, | |
180 | { "balance-alb", BOND_MODE_ALB}, | |
181 | { NULL, -1}, | |
182 | }; | |
183 | ||
12479f9a | 184 | struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
185 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
186 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 187 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
188 | { NULL, -1}, |
189 | }; | |
190 | ||
f5b2b966 JV |
191 | struct bond_parm_tbl arp_validate_tbl[] = { |
192 | { "none", BOND_ARP_VALIDATE_NONE}, | |
193 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
194 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
195 | { "all", BOND_ARP_VALIDATE_ALL}, | |
196 | { NULL, -1}, | |
197 | }; | |
198 | ||
3915c1e8 JV |
199 | struct bond_parm_tbl fail_over_mac_tbl[] = { |
200 | { "none", BOND_FOM_NONE}, | |
201 | { "active", BOND_FOM_ACTIVE}, | |
202 | { "follow", BOND_FOM_FOLLOW}, | |
203 | { NULL, -1}, | |
204 | }; | |
205 | ||
fd989c83 JV |
206 | struct bond_parm_tbl ad_select_tbl[] = { |
207 | { "stable", BOND_AD_STABLE}, | |
208 | { "bandwidth", BOND_AD_BANDWIDTH}, | |
209 | { "count", BOND_AD_COUNT}, | |
210 | { NULL, -1}, | |
211 | }; | |
212 | ||
1da177e4 LT |
213 | /*-------------------------- Forward declarations ---------------------------*/ |
214 | ||
c3ade5ca | 215 | static void bond_send_gratuitous_arp(struct bonding *bond); |
c50b85d0 | 216 | static void bond_deinit(struct net_device *bond_dev); |
1da177e4 LT |
217 | |
218 | /*---------------------------- General routines -----------------------------*/ | |
219 | ||
4ad072c9 | 220 | static const char *bond_mode_name(int mode) |
1da177e4 | 221 | { |
77afc92b HE |
222 | static const char *names[] = { |
223 | [BOND_MODE_ROUNDROBIN] = "load balancing (round-robin)", | |
224 | [BOND_MODE_ACTIVEBACKUP] = "fault-tolerance (active-backup)", | |
225 | [BOND_MODE_XOR] = "load balancing (xor)", | |
226 | [BOND_MODE_BROADCAST] = "fault-tolerance (broadcast)", | |
227 | [BOND_MODE_8023AD]= "IEEE 802.3ad Dynamic link aggregation", | |
228 | [BOND_MODE_TLB] = "transmit load balancing", | |
229 | [BOND_MODE_ALB] = "adaptive load balancing", | |
230 | }; | |
231 | ||
232 | if (mode < 0 || mode > BOND_MODE_ALB) | |
1da177e4 | 233 | return "unknown"; |
77afc92b HE |
234 | |
235 | return names[mode]; | |
1da177e4 LT |
236 | } |
237 | ||
238 | /*---------------------------------- VLAN -----------------------------------*/ | |
239 | ||
240 | /** | |
241 | * bond_add_vlan - add a new vlan id on bond | |
242 | * @bond: bond that got the notification | |
243 | * @vlan_id: the vlan id to add | |
244 | * | |
245 | * Returns -ENOMEM if allocation failed. | |
246 | */ | |
247 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
248 | { | |
249 | struct vlan_entry *vlan; | |
250 | ||
251 | dprintk("bond: %s, vlan id %d\n", | |
252 | (bond ? bond->dev->name: "None"), vlan_id); | |
253 | ||
305d552a | 254 | vlan = kzalloc(sizeof(struct vlan_entry), GFP_KERNEL); |
1da177e4 LT |
255 | if (!vlan) { |
256 | return -ENOMEM; | |
257 | } | |
258 | ||
259 | INIT_LIST_HEAD(&vlan->vlan_list); | |
260 | vlan->vlan_id = vlan_id; | |
261 | ||
262 | write_lock_bh(&bond->lock); | |
263 | ||
264 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
265 | ||
266 | write_unlock_bh(&bond->lock); | |
267 | ||
268 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
269 | ||
270 | return 0; | |
271 | } | |
272 | ||
273 | /** | |
274 | * bond_del_vlan - delete a vlan id from bond | |
275 | * @bond: bond that got the notification | |
276 | * @vlan_id: the vlan id to delete | |
277 | * | |
278 | * returns -ENODEV if @vlan_id was not found in @bond. | |
279 | */ | |
280 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
281 | { | |
0883beca | 282 | struct vlan_entry *vlan; |
1da177e4 LT |
283 | int res = -ENODEV; |
284 | ||
285 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
286 | ||
287 | write_lock_bh(&bond->lock); | |
288 | ||
0883beca | 289 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
290 | if (vlan->vlan_id == vlan_id) { |
291 | list_del(&vlan->vlan_list); | |
292 | ||
58402054 | 293 | if (bond_is_lb(bond)) |
1da177e4 | 294 | bond_alb_clear_vlan(bond, vlan_id); |
1da177e4 LT |
295 | |
296 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
297 | bond->dev->name); | |
298 | ||
299 | kfree(vlan); | |
300 | ||
301 | if (list_empty(&bond->vlan_list) && | |
302 | (bond->slave_cnt == 0)) { | |
303 | /* Last VLAN removed and no slaves, so | |
304 | * restore block on adding VLANs. This will | |
305 | * be removed once new slaves that are not | |
306 | * VLAN challenged will be added. | |
307 | */ | |
308 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
309 | } | |
310 | ||
311 | res = 0; | |
312 | goto out; | |
313 | } | |
314 | } | |
315 | ||
316 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
317 | bond->dev->name); | |
318 | ||
319 | out: | |
320 | write_unlock_bh(&bond->lock); | |
321 | return res; | |
322 | } | |
323 | ||
324 | /** | |
325 | * bond_has_challenged_slaves | |
326 | * @bond: the bond we're working on | |
327 | * | |
328 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
329 | * was found, 0 otherwise. | |
330 | * | |
331 | * Assumes bond->lock is held. | |
332 | */ | |
333 | static int bond_has_challenged_slaves(struct bonding *bond) | |
334 | { | |
335 | struct slave *slave; | |
336 | int i; | |
337 | ||
338 | bond_for_each_slave(bond, slave, i) { | |
339 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
340 | dprintk("found VLAN challenged slave - %s\n", | |
341 | slave->dev->name); | |
342 | return 1; | |
343 | } | |
344 | } | |
345 | ||
346 | dprintk("no VLAN challenged slaves found\n"); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | /** | |
351 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
352 | * @bond: the bond we're working on | |
353 | * @curr: item we're advancing from | |
354 | * | |
355 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
356 | * or @curr->next otherwise (even if it is @curr itself again). | |
357 | * | |
358 | * Caller must hold bond->lock | |
359 | */ | |
360 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
361 | { | |
362 | struct vlan_entry *next, *last; | |
363 | ||
364 | if (list_empty(&bond->vlan_list)) { | |
365 | return NULL; | |
366 | } | |
367 | ||
368 | if (!curr) { | |
369 | next = list_entry(bond->vlan_list.next, | |
370 | struct vlan_entry, vlan_list); | |
371 | } else { | |
372 | last = list_entry(bond->vlan_list.prev, | |
373 | struct vlan_entry, vlan_list); | |
374 | if (last == curr) { | |
375 | next = list_entry(bond->vlan_list.next, | |
376 | struct vlan_entry, vlan_list); | |
377 | } else { | |
378 | next = list_entry(curr->vlan_list.next, | |
379 | struct vlan_entry, vlan_list); | |
380 | } | |
381 | } | |
382 | ||
383 | return next; | |
384 | } | |
385 | ||
386 | /** | |
387 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
388 | * | |
389 | * @bond: bond device that got this skb for tx. | |
390 | * @skb: hw accel VLAN tagged skb to transmit | |
391 | * @slave_dev: slave that is supposed to xmit this skbuff | |
392 | * | |
393 | * When the bond gets an skb to transmit that is | |
394 | * already hardware accelerated VLAN tagged, and it | |
395 | * needs to relay this skb to a slave that is not | |
396 | * hw accel capable, the skb needs to be "unaccelerated", | |
397 | * i.e. strip the hwaccel tag and re-insert it as part | |
398 | * of the payload. | |
399 | */ | |
400 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
401 | { | |
966bc6f4 | 402 | unsigned short uninitialized_var(vlan_id); |
1da177e4 LT |
403 | |
404 | if (!list_empty(&bond->vlan_list) && | |
405 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
406 | vlan_get_tag(skb, &vlan_id) == 0) { | |
407 | skb->dev = slave_dev; | |
408 | skb = vlan_put_tag(skb, vlan_id); | |
409 | if (!skb) { | |
410 | /* vlan_put_tag() frees the skb in case of error, | |
411 | * so return success here so the calling functions | |
412 | * won't attempt to free is again. | |
413 | */ | |
414 | return 0; | |
415 | } | |
416 | } else { | |
417 | skb->dev = slave_dev; | |
418 | } | |
419 | ||
420 | skb->priority = 1; | |
421 | dev_queue_xmit(skb); | |
422 | ||
423 | return 0; | |
424 | } | |
425 | ||
426 | /* | |
427 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
428 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
429 | * lock because: | |
430 | * a. This operation is performed in IOCTL context, | |
431 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
432 | * c. Holding a lock with BH disabled while directly calling a base driver | |
433 | * entry point is generally a BAD idea. | |
434 | * | |
435 | * The design of synchronization/protection for this operation in the 8021q | |
436 | * module is good for one or more VLAN devices over a single physical device | |
437 | * and cannot be extended for a teaming solution like bonding, so there is a | |
438 | * potential race condition here where a net device from the vlan group might | |
439 | * be referenced (either by a base driver or the 8021q code) while it is being | |
440 | * removed from the system. However, it turns out we're not making matters | |
441 | * worse, and if it works for regular VLAN usage it will work here too. | |
442 | */ | |
443 | ||
444 | /** | |
445 | * bond_vlan_rx_register - Propagates registration to slaves | |
446 | * @bond_dev: bonding net device that got called | |
447 | * @grp: vlan group being registered | |
448 | */ | |
449 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
450 | { | |
454d7c9b | 451 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
452 | struct slave *slave; |
453 | int i; | |
454 | ||
455 | bond->vlgrp = grp; | |
456 | ||
457 | bond_for_each_slave(bond, slave, i) { | |
458 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 459 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
460 | |
461 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
462 | slave_ops->ndo_vlan_rx_register) { |
463 | slave_ops->ndo_vlan_rx_register(slave_dev, grp); | |
1da177e4 LT |
464 | } |
465 | } | |
466 | } | |
467 | ||
468 | /** | |
469 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
470 | * @bond_dev: bonding net device that got called | |
471 | * @vid: vlan id being added | |
472 | */ | |
473 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
474 | { | |
454d7c9b | 475 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
476 | struct slave *slave; |
477 | int i, res; | |
478 | ||
479 | bond_for_each_slave(bond, slave, i) { | |
480 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 481 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
482 | |
483 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a SH |
484 | slave_ops->ndo_vlan_rx_add_vid) { |
485 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vid); | |
1da177e4 LT |
486 | } |
487 | } | |
488 | ||
489 | res = bond_add_vlan(bond, vid); | |
490 | if (res) { | |
491 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 492 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
493 | bond_dev->name, vid); |
494 | } | |
495 | } | |
496 | ||
497 | /** | |
498 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
499 | * @bond_dev: bonding net device that got called | |
500 | * @vid: vlan id being removed | |
501 | */ | |
502 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
503 | { | |
454d7c9b | 504 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
505 | struct slave *slave; |
506 | struct net_device *vlan_dev; | |
507 | int i, res; | |
508 | ||
509 | bond_for_each_slave(bond, slave, i) { | |
510 | struct net_device *slave_dev = slave->dev; | |
eb7cc59a | 511 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
512 | |
513 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
eb7cc59a | 514 | slave_ops->ndo_vlan_rx_kill_vid) { |
1da177e4 LT |
515 | /* Save and then restore vlan_dev in the grp array, |
516 | * since the slave's driver might clear it. | |
517 | */ | |
5c15bdec | 518 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
eb7cc59a | 519 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 520 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
521 | } |
522 | } | |
523 | ||
524 | res = bond_del_vlan(bond, vid); | |
525 | if (res) { | |
526 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 527 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
528 | bond_dev->name, vid); |
529 | } | |
530 | } | |
531 | ||
532 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
533 | { | |
534 | struct vlan_entry *vlan; | |
eb7cc59a | 535 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
536 | |
537 | write_lock_bh(&bond->lock); | |
538 | ||
eb7cc59a | 539 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 540 | goto out; |
1da177e4 LT |
541 | |
542 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
543 | slave_ops->ndo_vlan_rx_register) |
544 | slave_ops->ndo_vlan_rx_register(slave_dev, bond->vlgrp); | |
1da177e4 LT |
545 | |
546 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 547 | !(slave_ops->ndo_vlan_rx_add_vid)) |
1da177e4 | 548 | goto out; |
1da177e4 | 549 | |
eb7cc59a SH |
550 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) |
551 | slave_ops->ndo_vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
1da177e4 LT |
552 | |
553 | out: | |
554 | write_unlock_bh(&bond->lock); | |
555 | } | |
556 | ||
557 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
558 | { | |
eb7cc59a | 559 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
560 | struct vlan_entry *vlan; |
561 | struct net_device *vlan_dev; | |
562 | ||
563 | write_lock_bh(&bond->lock); | |
564 | ||
eb7cc59a | 565 | if (list_empty(&bond->vlan_list)) |
1da177e4 | 566 | goto out; |
1da177e4 LT |
567 | |
568 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
eb7cc59a | 569 | !(slave_ops->ndo_vlan_rx_kill_vid)) |
1da177e4 | 570 | goto unreg; |
1da177e4 LT |
571 | |
572 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
573 | /* Save and then restore vlan_dev in the grp array, | |
574 | * since the slave's driver might clear it. | |
575 | */ | |
5c15bdec | 576 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
eb7cc59a | 577 | slave_ops->ndo_vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 578 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
579 | } |
580 | ||
581 | unreg: | |
582 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
eb7cc59a SH |
583 | slave_ops->ndo_vlan_rx_register) |
584 | slave_ops->ndo_vlan_rx_register(slave_dev, NULL); | |
1da177e4 LT |
585 | |
586 | out: | |
587 | write_unlock_bh(&bond->lock); | |
588 | } | |
589 | ||
590 | /*------------------------------- Link status -------------------------------*/ | |
591 | ||
ff59c456 JV |
592 | /* |
593 | * Set the carrier state for the master according to the state of its | |
594 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
595 | * do special 802.3ad magic. | |
596 | * | |
597 | * Returns zero if carrier state does not change, nonzero if it does. | |
598 | */ | |
599 | static int bond_set_carrier(struct bonding *bond) | |
600 | { | |
601 | struct slave *slave; | |
602 | int i; | |
603 | ||
604 | if (bond->slave_cnt == 0) | |
605 | goto down; | |
606 | ||
607 | if (bond->params.mode == BOND_MODE_8023AD) | |
608 | return bond_3ad_set_carrier(bond); | |
609 | ||
610 | bond_for_each_slave(bond, slave, i) { | |
611 | if (slave->link == BOND_LINK_UP) { | |
612 | if (!netif_carrier_ok(bond->dev)) { | |
613 | netif_carrier_on(bond->dev); | |
614 | return 1; | |
615 | } | |
616 | return 0; | |
617 | } | |
618 | } | |
619 | ||
620 | down: | |
621 | if (netif_carrier_ok(bond->dev)) { | |
622 | netif_carrier_off(bond->dev); | |
623 | return 1; | |
624 | } | |
625 | return 0; | |
626 | } | |
627 | ||
1da177e4 LT |
628 | /* |
629 | * Get link speed and duplex from the slave's base driver | |
630 | * using ethtool. If for some reason the call fails or the | |
631 | * values are invalid, fake speed and duplex to 100/Full | |
632 | * and return error. | |
633 | */ | |
634 | static int bond_update_speed_duplex(struct slave *slave) | |
635 | { | |
636 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 637 | struct ethtool_cmd etool; |
61a44b9c | 638 | int res; |
1da177e4 LT |
639 | |
640 | /* Fake speed and duplex */ | |
641 | slave->speed = SPEED_100; | |
642 | slave->duplex = DUPLEX_FULL; | |
643 | ||
61a44b9c MW |
644 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
645 | return -1; | |
1da177e4 | 646 | |
61a44b9c MW |
647 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
648 | if (res < 0) | |
1da177e4 | 649 | return -1; |
1da177e4 | 650 | |
1da177e4 LT |
651 | switch (etool.speed) { |
652 | case SPEED_10: | |
653 | case SPEED_100: | |
654 | case SPEED_1000: | |
94dbffd5 | 655 | case SPEED_10000: |
1da177e4 LT |
656 | break; |
657 | default: | |
658 | return -1; | |
659 | } | |
660 | ||
661 | switch (etool.duplex) { | |
662 | case DUPLEX_FULL: | |
663 | case DUPLEX_HALF: | |
664 | break; | |
665 | default: | |
666 | return -1; | |
667 | } | |
668 | ||
669 | slave->speed = etool.speed; | |
670 | slave->duplex = etool.duplex; | |
671 | ||
672 | return 0; | |
673 | } | |
674 | ||
675 | /* | |
676 | * if <dev> supports MII link status reporting, check its link status. | |
677 | * | |
678 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
679 | * depening upon the setting of the use_carrier parameter. | |
680 | * | |
681 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
682 | * can't tell and just pretend it is), or 0, meaning that the link is | |
683 | * down. | |
684 | * | |
685 | * If reporting is non-zero, instead of faking link up, return -1 if | |
686 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
687 | * support them). If use_carrier is set, return whatever it says. | |
688 | * It'd be nice if there was a good way to tell if a driver supports | |
689 | * netif_carrier, but there really isn't. | |
690 | */ | |
691 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
692 | { | |
eb7cc59a | 693 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
694 | static int (* ioctl)(struct net_device *, struct ifreq *, int); |
695 | struct ifreq ifr; | |
696 | struct mii_ioctl_data *mii; | |
1da177e4 | 697 | |
eb7cc59a | 698 | if (bond->params.use_carrier) |
1da177e4 | 699 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; |
1da177e4 | 700 | |
eb7cc59a | 701 | ioctl = slave_ops->ndo_do_ioctl; |
1da177e4 LT |
702 | if (ioctl) { |
703 | /* TODO: set pointer to correct ioctl on a per team member */ | |
704 | /* bases to make this more efficient. that is, once */ | |
705 | /* we determine the correct ioctl, we will always */ | |
706 | /* call it and not the others for that team */ | |
707 | /* member. */ | |
708 | ||
709 | /* | |
710 | * We cannot assume that SIOCGMIIPHY will also read a | |
711 | * register; not all network drivers (e.g., e100) | |
712 | * support that. | |
713 | */ | |
714 | ||
715 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
716 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
717 | mii = if_mii(&ifr); | |
718 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
719 | mii->reg_num = MII_BMSR; | |
720 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
721 | return (mii->val_out & BMSR_LSTATUS); | |
722 | } | |
723 | } | |
724 | } | |
725 | ||
61a44b9c MW |
726 | /* |
727 | * Some drivers cache ETHTOOL_GLINK for a period of time so we only | |
728 | * attempt to get link status from it if the above MII ioctls fail. | |
729 | */ | |
1da177e4 LT |
730 | if (slave_dev->ethtool_ops) { |
731 | if (slave_dev->ethtool_ops->get_link) { | |
732 | u32 link; | |
733 | ||
734 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
735 | ||
736 | return link ? BMSR_LSTATUS : 0; | |
737 | } | |
738 | } | |
739 | ||
1da177e4 LT |
740 | /* |
741 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 742 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
743 | * cannot report link status). If not reporting, pretend |
744 | * we're ok. | |
745 | */ | |
746 | return (reporting ? -1 : BMSR_LSTATUS); | |
747 | } | |
748 | ||
749 | /*----------------------------- Multicast list ------------------------------*/ | |
750 | ||
751 | /* | |
752 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
753 | */ | |
754 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
755 | { | |
756 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
757 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
758 | } | |
759 | ||
760 | /* | |
761 | * returns dmi entry if found, NULL otherwise | |
762 | */ | |
763 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
764 | { | |
765 | struct dev_mc_list *idmi; | |
766 | ||
767 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
768 | if (bond_is_dmi_same(dmi, idmi)) { | |
769 | return idmi; | |
770 | } | |
771 | } | |
772 | ||
773 | return NULL; | |
774 | } | |
775 | ||
776 | /* | |
777 | * Push the promiscuity flag down to appropriate slaves | |
778 | */ | |
7e1a1ac1 | 779 | static int bond_set_promiscuity(struct bonding *bond, int inc) |
1da177e4 | 780 | { |
7e1a1ac1 | 781 | int err = 0; |
1da177e4 LT |
782 | if (USES_PRIMARY(bond->params.mode)) { |
783 | /* write lock already acquired */ | |
784 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
785 | err = dev_set_promiscuity(bond->curr_active_slave->dev, |
786 | inc); | |
1da177e4 LT |
787 | } |
788 | } else { | |
789 | struct slave *slave; | |
790 | int i; | |
791 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
792 | err = dev_set_promiscuity(slave->dev, inc); |
793 | if (err) | |
794 | return err; | |
1da177e4 LT |
795 | } |
796 | } | |
7e1a1ac1 | 797 | return err; |
1da177e4 LT |
798 | } |
799 | ||
800 | /* | |
801 | * Push the allmulti flag down to all slaves | |
802 | */ | |
7e1a1ac1 | 803 | static int bond_set_allmulti(struct bonding *bond, int inc) |
1da177e4 | 804 | { |
7e1a1ac1 | 805 | int err = 0; |
1da177e4 LT |
806 | if (USES_PRIMARY(bond->params.mode)) { |
807 | /* write lock already acquired */ | |
808 | if (bond->curr_active_slave) { | |
7e1a1ac1 WC |
809 | err = dev_set_allmulti(bond->curr_active_slave->dev, |
810 | inc); | |
1da177e4 LT |
811 | } |
812 | } else { | |
813 | struct slave *slave; | |
814 | int i; | |
815 | bond_for_each_slave(bond, slave, i) { | |
7e1a1ac1 WC |
816 | err = dev_set_allmulti(slave->dev, inc); |
817 | if (err) | |
818 | return err; | |
1da177e4 LT |
819 | } |
820 | } | |
7e1a1ac1 | 821 | return err; |
1da177e4 LT |
822 | } |
823 | ||
824 | /* | |
825 | * Add a Multicast address to slaves | |
826 | * according to mode | |
827 | */ | |
828 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
829 | { | |
830 | if (USES_PRIMARY(bond->params.mode)) { | |
831 | /* write lock already acquired */ | |
832 | if (bond->curr_active_slave) { | |
833 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
834 | } | |
835 | } else { | |
836 | struct slave *slave; | |
837 | int i; | |
838 | bond_for_each_slave(bond, slave, i) { | |
839 | dev_mc_add(slave->dev, addr, alen, 0); | |
840 | } | |
841 | } | |
842 | } | |
843 | ||
844 | /* | |
845 | * Remove a multicast address from slave | |
846 | * according to mode | |
847 | */ | |
848 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
849 | { | |
850 | if (USES_PRIMARY(bond->params.mode)) { | |
851 | /* write lock already acquired */ | |
852 | if (bond->curr_active_slave) { | |
853 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
854 | } | |
855 | } else { | |
856 | struct slave *slave; | |
857 | int i; | |
858 | bond_for_each_slave(bond, slave, i) { | |
859 | dev_mc_delete(slave->dev, addr, alen, 0); | |
860 | } | |
861 | } | |
862 | } | |
863 | ||
a816c7c7 JV |
864 | |
865 | /* | |
866 | * Retrieve the list of registered multicast addresses for the bonding | |
867 | * device and retransmit an IGMP JOIN request to the current active | |
868 | * slave. | |
869 | */ | |
870 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
871 | { | |
872 | struct in_device *in_dev; | |
873 | struct ip_mc_list *im; | |
874 | ||
875 | rcu_read_lock(); | |
876 | in_dev = __in_dev_get_rcu(bond->dev); | |
877 | if (in_dev) { | |
878 | for (im = in_dev->mc_list; im; im = im->next) { | |
879 | ip_mc_rejoin_group(im); | |
880 | } | |
881 | } | |
882 | ||
883 | rcu_read_unlock(); | |
884 | } | |
885 | ||
1da177e4 LT |
886 | /* |
887 | * Totally destroys the mc_list in bond | |
888 | */ | |
889 | static void bond_mc_list_destroy(struct bonding *bond) | |
890 | { | |
891 | struct dev_mc_list *dmi; | |
892 | ||
893 | dmi = bond->mc_list; | |
894 | while (dmi) { | |
895 | bond->mc_list = dmi->next; | |
896 | kfree(dmi); | |
897 | dmi = bond->mc_list; | |
898 | } | |
a816c7c7 | 899 | bond->mc_list = NULL; |
1da177e4 LT |
900 | } |
901 | ||
902 | /* | |
903 | * Copy all the Multicast addresses from src to the bonding device dst | |
904 | */ | |
de54f390 | 905 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 906 | gfp_t gfp_flag) |
1da177e4 LT |
907 | { |
908 | struct dev_mc_list *dmi, *new_dmi; | |
909 | ||
910 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 911 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
912 | |
913 | if (!new_dmi) { | |
914 | /* FIXME: Potential memory leak !!! */ | |
915 | return -ENOMEM; | |
916 | } | |
917 | ||
918 | new_dmi->next = bond->mc_list; | |
919 | bond->mc_list = new_dmi; | |
920 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
921 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
922 | new_dmi->dmi_users = dmi->dmi_users; | |
923 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
924 | } | |
925 | ||
926 | return 0; | |
927 | } | |
928 | ||
929 | /* | |
930 | * flush all members of flush->mc_list from device dev->mc_list | |
931 | */ | |
932 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
933 | { | |
454d7c9b | 934 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
935 | struct dev_mc_list *dmi; |
936 | ||
937 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
938 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
939 | } | |
940 | ||
941 | if (bond->params.mode == BOND_MODE_8023AD) { | |
942 | /* del lacpdu mc addr from mc list */ | |
943 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
944 | ||
945 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
946 | } | |
947 | } | |
948 | ||
949 | /*--------------------------- Active slave change ---------------------------*/ | |
950 | ||
951 | /* | |
952 | * Update the mc list and multicast-related flags for the new and | |
953 | * old active slaves (if any) according to the multicast mode, and | |
954 | * promiscuous flags unconditionally. | |
955 | */ | |
956 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
957 | { | |
958 | struct dev_mc_list *dmi; | |
959 | ||
960 | if (!USES_PRIMARY(bond->params.mode)) { | |
961 | /* nothing to do - mc list is already up-to-date on | |
962 | * all slaves | |
963 | */ | |
964 | return; | |
965 | } | |
966 | ||
967 | if (old_active) { | |
968 | if (bond->dev->flags & IFF_PROMISC) { | |
969 | dev_set_promiscuity(old_active->dev, -1); | |
970 | } | |
971 | ||
972 | if (bond->dev->flags & IFF_ALLMULTI) { | |
973 | dev_set_allmulti(old_active->dev, -1); | |
974 | } | |
975 | ||
976 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
977 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
978 | } | |
979 | } | |
980 | ||
981 | if (new_active) { | |
7e1a1ac1 | 982 | /* FIXME: Signal errors upstream. */ |
1da177e4 LT |
983 | if (bond->dev->flags & IFF_PROMISC) { |
984 | dev_set_promiscuity(new_active->dev, 1); | |
985 | } | |
986 | ||
987 | if (bond->dev->flags & IFF_ALLMULTI) { | |
988 | dev_set_allmulti(new_active->dev, 1); | |
989 | } | |
990 | ||
991 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
992 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
993 | } | |
a816c7c7 | 994 | bond_resend_igmp_join_requests(bond); |
1da177e4 LT |
995 | } |
996 | } | |
997 | ||
3915c1e8 JV |
998 | /* |
999 | * bond_do_fail_over_mac | |
1000 | * | |
1001 | * Perform special MAC address swapping for fail_over_mac settings | |
1002 | * | |
1003 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
1004 | */ | |
1005 | static void bond_do_fail_over_mac(struct bonding *bond, | |
1006 | struct slave *new_active, | |
1007 | struct slave *old_active) | |
1008 | { | |
1009 | u8 tmp_mac[ETH_ALEN]; | |
1010 | struct sockaddr saddr; | |
1011 | int rv; | |
1012 | ||
1013 | switch (bond->params.fail_over_mac) { | |
1014 | case BOND_FOM_ACTIVE: | |
1015 | if (new_active) | |
1016 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
1017 | new_active->dev->addr_len); | |
1018 | break; | |
1019 | case BOND_FOM_FOLLOW: | |
1020 | /* | |
1021 | * if new_active && old_active, swap them | |
1022 | * if just old_active, do nothing (going to no active slave) | |
1023 | * if just new_active, set new_active to bond's MAC | |
1024 | */ | |
1025 | if (!new_active) | |
1026 | return; | |
1027 | ||
1028 | write_unlock_bh(&bond->curr_slave_lock); | |
1029 | read_unlock(&bond->lock); | |
1030 | ||
1031 | if (old_active) { | |
1032 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
1033 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
1034 | ETH_ALEN); | |
1035 | saddr.sa_family = new_active->dev->type; | |
1036 | } else { | |
1037 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
1038 | saddr.sa_family = bond->dev->type; | |
1039 | } | |
1040 | ||
1041 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
1042 | if (rv) { | |
1043 | printk(KERN_ERR DRV_NAME | |
1044 | ": %s: Error %d setting MAC of slave %s\n", | |
1045 | bond->dev->name, -rv, new_active->dev->name); | |
1046 | goto out; | |
1047 | } | |
1048 | ||
1049 | if (!old_active) | |
1050 | goto out; | |
1051 | ||
1052 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1053 | saddr.sa_family = old_active->dev->type; | |
1054 | ||
1055 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1056 | if (rv) | |
1057 | printk(KERN_ERR DRV_NAME | |
1058 | ": %s: Error %d setting MAC of slave %s\n", | |
1059 | bond->dev->name, -rv, new_active->dev->name); | |
1060 | out: | |
1061 | read_lock(&bond->lock); | |
1062 | write_lock_bh(&bond->curr_slave_lock); | |
1063 | break; | |
1064 | default: | |
1065 | printk(KERN_ERR DRV_NAME | |
1066 | ": %s: bond_do_fail_over_mac impossible: bad policy %d\n", | |
1067 | bond->dev->name, bond->params.fail_over_mac); | |
1068 | break; | |
1069 | } | |
1070 | ||
1071 | } | |
1072 | ||
1073 | ||
1da177e4 LT |
1074 | /** |
1075 | * find_best_interface - select the best available slave to be the active one | |
1076 | * @bond: our bonding struct | |
1077 | * | |
1078 | * Warning: Caller must hold curr_slave_lock for writing. | |
1079 | */ | |
1080 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1081 | { | |
1082 | struct slave *new_active, *old_active; | |
1083 | struct slave *bestslave = NULL; | |
1084 | int mintime = bond->params.updelay; | |
1085 | int i; | |
1086 | ||
1087 | new_active = old_active = bond->curr_active_slave; | |
1088 | ||
1089 | if (!new_active) { /* there were no active slaves left */ | |
1090 | if (bond->slave_cnt > 0) { /* found one slave */ | |
1091 | new_active = bond->first_slave; | |
1092 | } else { | |
1093 | return NULL; /* still no slave, return NULL */ | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | /* first try the primary link; if arping, a link must tx/rx traffic | |
1098 | * before it can be considered the curr_active_slave - also, we would skip | |
1099 | * slaves between the curr_active_slave and primary_slave that may be up | |
1100 | * and able to arp | |
1101 | */ | |
1102 | if ((bond->primary_slave) && | |
1103 | (!bond->params.arp_interval) && | |
1104 | (IS_UP(bond->primary_slave->dev))) { | |
1105 | new_active = bond->primary_slave; | |
1106 | } | |
1107 | ||
1108 | /* remember where to stop iterating over the slaves */ | |
1109 | old_active = new_active; | |
1110 | ||
1111 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1112 | if (IS_UP(new_active->dev)) { | |
1113 | if (new_active->link == BOND_LINK_UP) { | |
1114 | return new_active; | |
1115 | } else if (new_active->link == BOND_LINK_BACK) { | |
1116 | /* link up, but waiting for stabilization */ | |
1117 | if (new_active->delay < mintime) { | |
1118 | mintime = new_active->delay; | |
1119 | bestslave = new_active; | |
1120 | } | |
1121 | } | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | return bestslave; | |
1126 | } | |
1127 | ||
1128 | /** | |
1129 | * change_active_interface - change the active slave into the specified one | |
1130 | * @bond: our bonding struct | |
1131 | * @new: the new slave to make the active one | |
1132 | * | |
1133 | * Set the new slave to the bond's settings and unset them on the old | |
1134 | * curr_active_slave. | |
1135 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1136 | * | |
1137 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1138 | * because it is apparently the best available slave we have, even though its | |
1139 | * updelay hasn't timed out yet. | |
1140 | * | |
3915c1e8 JV |
1141 | * If new_active is not NULL, caller must hold bond->lock for read and |
1142 | * curr_slave_lock for write_bh. | |
1da177e4 | 1143 | */ |
a77b5325 | 1144 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1145 | { |
1146 | struct slave *old_active = bond->curr_active_slave; | |
1147 | ||
1148 | if (old_active == new_active) { | |
1149 | return; | |
1150 | } | |
1151 | ||
1152 | if (new_active) { | |
b2220cad JV |
1153 | new_active->jiffies = jiffies; |
1154 | ||
1da177e4 LT |
1155 | if (new_active->link == BOND_LINK_BACK) { |
1156 | if (USES_PRIMARY(bond->params.mode)) { | |
1157 | printk(KERN_INFO DRV_NAME | |
1158 | ": %s: making interface %s the new " | |
1159 | "active one %d ms earlier.\n", | |
1160 | bond->dev->name, new_active->dev->name, | |
1161 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1162 | } | |
1163 | ||
1164 | new_active->delay = 0; | |
1165 | new_active->link = BOND_LINK_UP; | |
1da177e4 LT |
1166 | |
1167 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1168 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1169 | } | |
1170 | ||
58402054 | 1171 | if (bond_is_lb(bond)) |
1da177e4 | 1172 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); |
1da177e4 LT |
1173 | } else { |
1174 | if (USES_PRIMARY(bond->params.mode)) { | |
1175 | printk(KERN_INFO DRV_NAME | |
1176 | ": %s: making interface %s the new " | |
1177 | "active one.\n", | |
1178 | bond->dev->name, new_active->dev->name); | |
1179 | } | |
1180 | } | |
1181 | } | |
1182 | ||
1da177e4 LT |
1183 | if (USES_PRIMARY(bond->params.mode)) { |
1184 | bond_mc_swap(bond, new_active, old_active); | |
1185 | } | |
1186 | ||
58402054 | 1187 | if (bond_is_lb(bond)) { |
1da177e4 | 1188 | bond_alb_handle_active_change(bond, new_active); |
8f903c70 JV |
1189 | if (old_active) |
1190 | bond_set_slave_inactive_flags(old_active); | |
1191 | if (new_active) | |
1192 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1193 | } else { |
1194 | bond->curr_active_slave = new_active; | |
1195 | } | |
c3ade5ca JV |
1196 | |
1197 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1198 | if (old_active) { | |
1199 | bond_set_slave_inactive_flags(old_active); | |
1200 | } | |
1201 | ||
1202 | if (new_active) { | |
1203 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1204 | |
709f8a45 OG |
1205 | if (bond->params.fail_over_mac) |
1206 | bond_do_fail_over_mac(bond, new_active, | |
1207 | old_active); | |
3915c1e8 | 1208 | |
709f8a45 | 1209 | bond->send_grat_arp = bond->params.num_grat_arp; |
b59f9f74 | 1210 | bond_send_gratuitous_arp(bond); |
01f3109d | 1211 | |
305d552a BH |
1212 | bond->send_unsol_na = bond->params.num_unsol_na; |
1213 | bond_send_unsolicited_na(bond); | |
1214 | ||
01f3109d OG |
1215 | write_unlock_bh(&bond->curr_slave_lock); |
1216 | read_unlock(&bond->lock); | |
1217 | ||
1218 | netdev_bonding_change(bond->dev); | |
1219 | ||
1220 | read_lock(&bond->lock); | |
1221 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1222 | } |
c3ade5ca | 1223 | } |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | /** | |
1227 | * bond_select_active_slave - select a new active slave, if needed | |
1228 | * @bond: our bonding struct | |
1229 | * | |
1230 | * This functions shoud be called when one of the following occurs: | |
1231 | * - The old curr_active_slave has been released or lost its link. | |
1232 | * - The primary_slave has got its link back. | |
1233 | * - A slave has got its link back and there's no old curr_active_slave. | |
1234 | * | |
3915c1e8 | 1235 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1236 | */ |
a77b5325 | 1237 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1238 | { |
1239 | struct slave *best_slave; | |
ff59c456 | 1240 | int rv; |
1da177e4 LT |
1241 | |
1242 | best_slave = bond_find_best_slave(bond); | |
1243 | if (best_slave != bond->curr_active_slave) { | |
1244 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1245 | rv = bond_set_carrier(bond); |
1246 | if (!rv) | |
1247 | return; | |
1248 | ||
1249 | if (netif_carrier_ok(bond->dev)) { | |
1250 | printk(KERN_INFO DRV_NAME | |
1251 | ": %s: first active interface up!\n", | |
1252 | bond->dev->name); | |
1253 | } else { | |
1254 | printk(KERN_INFO DRV_NAME ": %s: " | |
1255 | "now running without any active interface !\n", | |
1256 | bond->dev->name); | |
1257 | } | |
1da177e4 LT |
1258 | } |
1259 | } | |
1260 | ||
1261 | /*--------------------------- slave list handling ---------------------------*/ | |
1262 | ||
1263 | /* | |
1264 | * This function attaches the slave to the end of list. | |
1265 | * | |
1266 | * bond->lock held for writing by caller. | |
1267 | */ | |
1268 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1269 | { | |
1270 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1271 | new_slave->next = new_slave; | |
1272 | new_slave->prev = new_slave; | |
1273 | bond->first_slave = new_slave; | |
1274 | } else { | |
1275 | new_slave->next = bond->first_slave; | |
1276 | new_slave->prev = bond->first_slave->prev; | |
1277 | new_slave->next->prev = new_slave; | |
1278 | new_slave->prev->next = new_slave; | |
1279 | } | |
1280 | ||
1281 | bond->slave_cnt++; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * This function detaches the slave from the list. | |
1286 | * WARNING: no check is made to verify if the slave effectively | |
1287 | * belongs to <bond>. | |
1288 | * Nothing is freed on return, structures are just unchained. | |
1289 | * If any slave pointer in bond was pointing to <slave>, | |
1290 | * it should be changed by the calling function. | |
1291 | * | |
1292 | * bond->lock held for writing by caller. | |
1293 | */ | |
1294 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1295 | { | |
1296 | if (slave->next) { | |
1297 | slave->next->prev = slave->prev; | |
1298 | } | |
1299 | ||
1300 | if (slave->prev) { | |
1301 | slave->prev->next = slave->next; | |
1302 | } | |
1303 | ||
1304 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1305 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1306 | bond->first_slave = slave->next; | |
1307 | } else { | |
1308 | bond->first_slave = NULL; /* slave was the last one */ | |
1309 | } | |
1310 | } | |
1311 | ||
1312 | slave->next = NULL; | |
1313 | slave->prev = NULL; | |
1314 | bond->slave_cnt--; | |
1315 | } | |
1316 | ||
1317 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1318 | ||
4ad072c9 AB |
1319 | static int bond_sethwaddr(struct net_device *bond_dev, |
1320 | struct net_device *slave_dev) | |
1da177e4 LT |
1321 | { |
1322 | dprintk("bond_dev=%p\n", bond_dev); | |
1323 | dprintk("slave_dev=%p\n", slave_dev); | |
1324 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1325 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1326 | return 0; | |
1327 | } | |
1328 | ||
7f353bf2 HX |
1329 | #define BOND_VLAN_FEATURES \ |
1330 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1331 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff AK |
1332 | |
1333 | /* | |
8e3babcd | 1334 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1335 | * feature bits are managed elsewhere, so preserve those feature bits |
1336 | * on the master device. | |
8531c5ff AK |
1337 | */ |
1338 | static int bond_compute_features(struct bonding *bond) | |
1339 | { | |
8531c5ff AK |
1340 | struct slave *slave; |
1341 | struct net_device *bond_dev = bond->dev; | |
7f353bf2 | 1342 | unsigned long features = bond_dev->features; |
3158bf7d MS |
1343 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1344 | bond_dev->hard_header_len); | |
8e3babcd | 1345 | int i; |
8531c5ff | 1346 | |
7f353bf2 | 1347 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
b63365a2 HX |
1348 | features |= NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; |
1349 | ||
1350 | if (!bond->first_slave) | |
1351 | goto done; | |
1352 | ||
1353 | features &= ~NETIF_F_ONE_FOR_ALL; | |
7f353bf2 | 1354 | |
54ef3137 | 1355 | bond_for_each_slave(bond, slave, i) { |
b63365a2 HX |
1356 | features = netdev_increment_features(features, |
1357 | slave->dev->features, | |
1358 | NETIF_F_ONE_FOR_ALL); | |
54ef3137 JV |
1359 | if (slave->dev->hard_header_len > max_hard_header_len) |
1360 | max_hard_header_len = slave->dev->hard_header_len; | |
1361 | } | |
8531c5ff | 1362 | |
b63365a2 | 1363 | done: |
7f353bf2 | 1364 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
b63365a2 | 1365 | bond_dev->features = netdev_fix_features(features, NULL); |
54ef3137 | 1366 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1367 | |
1368 | return 0; | |
1369 | } | |
1370 | ||
872254dd MS |
1371 | static void bond_setup_by_slave(struct net_device *bond_dev, |
1372 | struct net_device *slave_dev) | |
1373 | { | |
454d7c9b | 1374 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a | 1375 | |
00829823 | 1376 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1377 | |
1378 | bond_dev->type = slave_dev->type; | |
1379 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1380 | bond_dev->addr_len = slave_dev->addr_len; | |
1381 | ||
1382 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1383 | slave_dev->addr_len); | |
d90a162a | 1384 | bond->setup_by_slave = 1; |
872254dd MS |
1385 | } |
1386 | ||
1da177e4 | 1387 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1388 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1389 | { |
454d7c9b | 1390 | struct bonding *bond = netdev_priv(bond_dev); |
eb7cc59a | 1391 | const struct net_device_ops *slave_ops = slave_dev->netdev_ops; |
1da177e4 LT |
1392 | struct slave *new_slave = NULL; |
1393 | struct dev_mc_list *dmi; | |
1394 | struct sockaddr addr; | |
1395 | int link_reporting; | |
1396 | int old_features = bond_dev->features; | |
1397 | int res = 0; | |
1398 | ||
552709d5 | 1399 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
eb7cc59a | 1400 | slave_ops->ndo_do_ioctl == NULL) { |
1da177e4 | 1401 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1402 | ": %s: Warning: no link monitoring support for %s\n", |
1403 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1404 | } |
1405 | ||
1406 | /* bond must be initialized by bond_open() before enslaving */ | |
1407 | if (!(bond_dev->flags & IFF_UP)) { | |
6b1bf096 MS |
1408 | printk(KERN_WARNING DRV_NAME |
1409 | " %s: master_dev is not up in bond_enslave\n", | |
1410 | bond_dev->name); | |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | /* already enslaved */ | |
1414 | if (slave_dev->flags & IFF_SLAVE) { | |
1415 | dprintk("Error, Device was already enslaved\n"); | |
1416 | return -EBUSY; | |
1417 | } | |
1418 | ||
1419 | /* vlan challenged mutual exclusion */ | |
1420 | /* no need to lock since we're protected by rtnl_lock */ | |
1421 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1422 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1423 | if (!list_empty(&bond->vlan_list)) { | |
1424 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1425 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1426 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1427 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1428 | bond_dev->name); |
1429 | return -EPERM; | |
1430 | } else { | |
1431 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1432 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1433 | "slave %s. Adding VLANs will be blocked as " |
1434 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1435 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1436 | bond_dev->name); |
1437 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1438 | } | |
1439 | } else { | |
1440 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1441 | if (bond->slave_cnt == 0) { | |
1442 | /* First slave, and it is not VLAN challenged, | |
1443 | * so remove the block of adding VLANs over the bond. | |
1444 | */ | |
1445 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1446 | } | |
1447 | } | |
1448 | ||
217df670 JV |
1449 | /* |
1450 | * Old ifenslave binaries are no longer supported. These can | |
1451 | * be identified with moderate accurary by the state of the slave: | |
1452 | * the current ifenslave will set the interface down prior to | |
1453 | * enslaving it; the old ifenslave will not. | |
1454 | */ | |
1455 | if ((slave_dev->flags & IFF_UP)) { | |
1456 | printk(KERN_ERR DRV_NAME ": %s is up. " | |
1457 | "This may be due to an out of date ifenslave.\n", | |
1458 | slave_dev->name); | |
1459 | res = -EPERM; | |
1460 | goto err_undo_flags; | |
1461 | } | |
1da177e4 | 1462 | |
872254dd MS |
1463 | /* set bonding device ether type by slave - bonding netdevices are |
1464 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1465 | * there is a need to override some of the type dependent attribs/funcs. | |
1466 | * | |
1467 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1468 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1469 | */ | |
1470 | if (bond->slave_cnt == 0) { | |
1471 | if (slave_dev->type != ARPHRD_ETHER) | |
1472 | bond_setup_by_slave(bond_dev, slave_dev); | |
1473 | } else if (bond_dev->type != slave_dev->type) { | |
1474 | printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different " | |
1475 | "from other slaves (%d), can not enslave it.\n", | |
1476 | slave_dev->name, | |
1477 | slave_dev->type, bond_dev->type); | |
1478 | res = -EINVAL; | |
1479 | goto err_undo_flags; | |
1480 | } | |
1481 | ||
eb7cc59a | 1482 | if (slave_ops->ndo_set_mac_address == NULL) { |
2ab82852 MS |
1483 | if (bond->slave_cnt == 0) { |
1484 | printk(KERN_WARNING DRV_NAME | |
dd957c57 JV |
1485 | ": %s: Warning: The first slave device " |
1486 | "specified does not support setting the MAC " | |
3915c1e8 | 1487 | "address. Setting fail_over_mac to active.", |
dd957c57 | 1488 | bond_dev->name); |
3915c1e8 JV |
1489 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1490 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
2ab82852 | 1491 | printk(KERN_ERR DRV_NAME |
dd957c57 JV |
1492 | ": %s: Error: The slave device specified " |
1493 | "does not support setting the MAC address, " | |
3915c1e8 | 1494 | "but fail_over_mac is not set to active.\n" |
2ab82852 MS |
1495 | , bond_dev->name); |
1496 | res = -EOPNOTSUPP; | |
1497 | goto err_undo_flags; | |
1498 | } | |
1da177e4 LT |
1499 | } |
1500 | ||
243cb4e5 | 1501 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1502 | if (!new_slave) { |
1503 | res = -ENOMEM; | |
1504 | goto err_undo_flags; | |
1505 | } | |
1506 | ||
1da177e4 LT |
1507 | /* save slave's original flags before calling |
1508 | * netdev_set_master and dev_open | |
1509 | */ | |
1510 | new_slave->original_flags = slave_dev->flags; | |
1511 | ||
217df670 JV |
1512 | /* |
1513 | * Save slave's original ("permanent") mac address for modes | |
1514 | * that need it, and for restoring it upon release, and then | |
1515 | * set it to the master's address | |
1516 | */ | |
1517 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1518 | |
dd957c57 | 1519 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1520 | /* |
1521 | * Set slave to master's mac address. The application already | |
1522 | * set the master's mac address to that of the first slave | |
1523 | */ | |
1524 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1525 | addr.sa_family = slave_dev->type; | |
1526 | res = dev_set_mac_address(slave_dev, &addr); | |
1527 | if (res) { | |
1528 | dprintk("Error %d calling set_mac_address\n", res); | |
1529 | goto err_free; | |
1530 | } | |
217df670 | 1531 | } |
1da177e4 | 1532 | |
c2edacf8 JV |
1533 | res = netdev_set_master(slave_dev, bond_dev); |
1534 | if (res) { | |
1535 | dprintk("Error %d calling netdev_set_master\n", res); | |
569f0c4d | 1536 | goto err_restore_mac; |
c2edacf8 | 1537 | } |
217df670 JV |
1538 | /* open the slave since the application closed it */ |
1539 | res = dev_open(slave_dev); | |
1540 | if (res) { | |
1541 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
569f0c4d | 1542 | goto err_unset_master; |
1da177e4 LT |
1543 | } |
1544 | ||
1da177e4 | 1545 | new_slave->dev = slave_dev; |
0b680e75 | 1546 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 | 1547 | |
58402054 | 1548 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1549 | /* bond_alb_init_slave() must be called before all other stages since |
1550 | * it might fail and we do not want to have to undo everything | |
1551 | */ | |
1552 | res = bond_alb_init_slave(bond, new_slave); | |
1553 | if (res) { | |
569f0c4d | 1554 | goto err_close; |
1da177e4 LT |
1555 | } |
1556 | } | |
1557 | ||
1558 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1559 | * master's promisc (and mc) settings only if it becomes the | |
1560 | * curr_active_slave, and that is taken care of later when calling | |
1561 | * bond_change_active() | |
1562 | */ | |
1563 | if (!USES_PRIMARY(bond->params.mode)) { | |
1564 | /* set promiscuity level to new slave */ | |
1565 | if (bond_dev->flags & IFF_PROMISC) { | |
7e1a1ac1 WC |
1566 | res = dev_set_promiscuity(slave_dev, 1); |
1567 | if (res) | |
1568 | goto err_close; | |
1da177e4 LT |
1569 | } |
1570 | ||
1571 | /* set allmulti level to new slave */ | |
1572 | if (bond_dev->flags & IFF_ALLMULTI) { | |
7e1a1ac1 WC |
1573 | res = dev_set_allmulti(slave_dev, 1); |
1574 | if (res) | |
1575 | goto err_close; | |
1da177e4 LT |
1576 | } |
1577 | ||
b9e40857 | 1578 | netif_addr_lock_bh(bond_dev); |
1da177e4 LT |
1579 | /* upload master's mc_list to new slave */ |
1580 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1581 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1582 | } | |
b9e40857 | 1583 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1584 | } |
1585 | ||
1586 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1587 | /* add lacpdu mc addr to mc list */ | |
1588 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1589 | ||
1590 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1591 | } | |
1592 | ||
1593 | bond_add_vlans_on_slave(bond, slave_dev); | |
1594 | ||
1595 | write_lock_bh(&bond->lock); | |
1596 | ||
1597 | bond_attach_slave(bond, new_slave); | |
1598 | ||
1599 | new_slave->delay = 0; | |
1600 | new_slave->link_failure_count = 0; | |
1601 | ||
8531c5ff AK |
1602 | bond_compute_features(bond); |
1603 | ||
3915c1e8 JV |
1604 | write_unlock_bh(&bond->lock); |
1605 | ||
1606 | read_lock(&bond->lock); | |
1607 | ||
f5b2b966 JV |
1608 | new_slave->last_arp_rx = jiffies; |
1609 | ||
1da177e4 LT |
1610 | if (bond->params.miimon && !bond->params.use_carrier) { |
1611 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1612 | ||
1613 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1614 | /* | |
1615 | * miimon is set but a bonded network driver | |
1616 | * does not support ETHTOOL/MII and | |
1617 | * arp_interval is not set. Note: if | |
1618 | * use_carrier is enabled, we will never go | |
1619 | * here (because netif_carrier is always | |
1620 | * supported); thus, we don't need to change | |
1621 | * the messages for netif_carrier. | |
1622 | */ | |
1623 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1624 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1625 | "available for interface %s, and " |
1626 | "arp_interval/arp_ip_target module parameters " | |
1627 | "not specified, thus bonding will not detect " | |
1628 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1629 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1630 | } else if (link_reporting == -1) { |
1631 | /* unable get link status using mii/ethtool */ | |
1632 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1633 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1634 | "interface %s; the network driver associated " |
1635 | "with this interface does not support MII or " | |
1636 | "ETHTOOL link status reporting, thus miimon " | |
1637 | "has no effect on this interface.\n", | |
4e0952c7 | 1638 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1639 | } |
1640 | } | |
1641 | ||
1642 | /* check for initial state */ | |
1643 | if (!bond->params.miimon || | |
1644 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1645 | if (bond->params.updelay) { | |
1646 | dprintk("Initial state of slave_dev is " | |
1647 | "BOND_LINK_BACK\n"); | |
1648 | new_slave->link = BOND_LINK_BACK; | |
1649 | new_slave->delay = bond->params.updelay; | |
1650 | } else { | |
1651 | dprintk("Initial state of slave_dev is " | |
1652 | "BOND_LINK_UP\n"); | |
1653 | new_slave->link = BOND_LINK_UP; | |
1654 | } | |
1655 | new_slave->jiffies = jiffies; | |
1656 | } else { | |
1657 | dprintk("Initial state of slave_dev is " | |
1658 | "BOND_LINK_DOWN\n"); | |
1659 | new_slave->link = BOND_LINK_DOWN; | |
1660 | } | |
1661 | ||
1662 | if (bond_update_speed_duplex(new_slave) && | |
1663 | (new_slave->link != BOND_LINK_DOWN)) { | |
1664 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1665 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1666 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1667 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1668 | |
1669 | if (bond->params.mode == BOND_MODE_8023AD) { | |
4e0952c7 MW |
1670 | printk(KERN_WARNING DRV_NAME |
1671 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " | |
1da177e4 | 1672 | "support in base driver for proper aggregator " |
4e0952c7 | 1673 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1674 | } |
1675 | } | |
1676 | ||
1677 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1678 | /* if there is a primary slave, remember it */ | |
1679 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1680 | bond->primary_slave = new_slave; | |
1681 | } | |
1682 | } | |
1683 | ||
3915c1e8 JV |
1684 | write_lock_bh(&bond->curr_slave_lock); |
1685 | ||
1da177e4 LT |
1686 | switch (bond->params.mode) { |
1687 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1688 | bond_set_slave_inactive_flags(new_slave); |
1689 | bond_select_active_slave(bond); | |
1da177e4 LT |
1690 | break; |
1691 | case BOND_MODE_8023AD: | |
1692 | /* in 802.3ad mode, the internal mechanism | |
1693 | * will activate the slaves in the selected | |
1694 | * aggregator | |
1695 | */ | |
1696 | bond_set_slave_inactive_flags(new_slave); | |
1697 | /* if this is the first slave */ | |
1698 | if (bond->slave_cnt == 1) { | |
1699 | SLAVE_AD_INFO(new_slave).id = 1; | |
1700 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1701 | * can be called only after the mac address of the bond is set | |
1702 | */ | |
1703 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1704 | bond->params.lacp_fast); | |
1705 | } else { | |
1706 | SLAVE_AD_INFO(new_slave).id = | |
1707 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1708 | } | |
1709 | ||
1710 | bond_3ad_bind_slave(new_slave); | |
1711 | break; | |
1712 | case BOND_MODE_TLB: | |
1713 | case BOND_MODE_ALB: | |
1714 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1715 | bond_set_slave_inactive_flags(new_slave); |
1da177e4 LT |
1716 | break; |
1717 | default: | |
1718 | dprintk("This slave is always active in trunk mode\n"); | |
1719 | ||
1720 | /* always active in trunk mode */ | |
1721 | new_slave->state = BOND_STATE_ACTIVE; | |
1722 | ||
1723 | /* In trunking mode there is little meaning to curr_active_slave | |
1724 | * anyway (it holds no special properties of the bond device), | |
1725 | * so we can change it without calling change_active_interface() | |
1726 | */ | |
1727 | if (!bond->curr_active_slave) { | |
1728 | bond->curr_active_slave = new_slave; | |
1729 | } | |
1730 | break; | |
1731 | } /* switch(bond_mode) */ | |
1732 | ||
3915c1e8 JV |
1733 | write_unlock_bh(&bond->curr_slave_lock); |
1734 | ||
ff59c456 JV |
1735 | bond_set_carrier(bond); |
1736 | ||
3915c1e8 | 1737 | read_unlock(&bond->lock); |
1da177e4 | 1738 | |
b76cdba9 MW |
1739 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1740 | if (res) | |
569f0c4d | 1741 | goto err_close; |
b76cdba9 | 1742 | |
1da177e4 LT |
1743 | printk(KERN_INFO DRV_NAME |
1744 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1745 | bond_dev->name, slave_dev->name, | |
1746 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1747 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1748 | ||
1749 | /* enslave is successful */ | |
1750 | return 0; | |
1751 | ||
1752 | /* Undo stages on error */ | |
1da177e4 LT |
1753 | err_close: |
1754 | dev_close(slave_dev); | |
1755 | ||
569f0c4d JV |
1756 | err_unset_master: |
1757 | netdev_set_master(slave_dev, NULL); | |
1758 | ||
1da177e4 | 1759 | err_restore_mac: |
dd957c57 | 1760 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1761 | /* XXX TODO - fom follow mode needs to change master's |
1762 | * MAC if this slave's MAC is in use by the bond, or at | |
1763 | * least print a warning. | |
1764 | */ | |
2ab82852 MS |
1765 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1766 | addr.sa_family = slave_dev->type; | |
1767 | dev_set_mac_address(slave_dev, &addr); | |
1768 | } | |
1da177e4 LT |
1769 | |
1770 | err_free: | |
1771 | kfree(new_slave); | |
1772 | ||
1773 | err_undo_flags: | |
1774 | bond_dev->features = old_features; | |
8531c5ff | 1775 | |
1da177e4 LT |
1776 | return res; |
1777 | } | |
1778 | ||
1779 | /* | |
1780 | * Try to release the slave device <slave> from the bond device <master> | |
1781 | * It is legal to access curr_active_slave without a lock because all the function | |
1782 | * is write-locked. | |
1783 | * | |
1784 | * The rules for slave state should be: | |
1785 | * for Active/Backup: | |
1786 | * Active stays on all backups go down | |
1787 | * for Bonded connections: | |
1788 | * The first up interface should be left on and all others downed. | |
1789 | */ | |
a77b5325 | 1790 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 | 1791 | { |
454d7c9b | 1792 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1793 | struct slave *slave, *oldcurrent; |
1794 | struct sockaddr addr; | |
1795 | int mac_addr_differ; | |
1796 | ||
1797 | /* slave is not a slave or master is not master of this slave */ | |
1798 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1799 | (slave_dev->master != bond_dev)) { | |
1800 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1801 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
1802 | bond_dev->name, slave_dev->name); |
1803 | return -EINVAL; | |
1804 | } | |
1805 | ||
1806 | write_lock_bh(&bond->lock); | |
1807 | ||
1808 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1809 | if (!slave) { | |
1810 | /* not a slave of this bond */ | |
1811 | printk(KERN_INFO DRV_NAME | |
1812 | ": %s: %s not enslaved\n", | |
1813 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1814 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1815 | return -EINVAL; |
1816 | } | |
1817 | ||
3915c1e8 JV |
1818 | if (!bond->params.fail_over_mac) { |
1819 | mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr, | |
1820 | ETH_ALEN); | |
1821 | if (!mac_addr_differ && (bond->slave_cnt > 1)) | |
1822 | printk(KERN_WARNING DRV_NAME | |
1823 | ": %s: Warning: the permanent HWaddr of %s - " | |
e174961c | 1824 | "%pM - is still in use by %s. " |
3915c1e8 JV |
1825 | "Set the HWaddr of %s to a different address " |
1826 | "to avoid conflicts.\n", | |
1827 | bond_dev->name, slave_dev->name, | |
e174961c | 1828 | slave->perm_hwaddr, |
3915c1e8 | 1829 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1830 | } |
1831 | ||
1832 | /* Inform AD package of unbinding of slave. */ | |
1833 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1834 | /* must be called before the slave is | |
1835 | * detached from the list | |
1836 | */ | |
1837 | bond_3ad_unbind_slave(slave); | |
1838 | } | |
1839 | ||
1840 | printk(KERN_INFO DRV_NAME | |
1841 | ": %s: releasing %s interface %s\n", | |
1842 | bond_dev->name, | |
1843 | (slave->state == BOND_STATE_ACTIVE) | |
1844 | ? "active" : "backup", | |
1845 | slave_dev->name); | |
1846 | ||
1847 | oldcurrent = bond->curr_active_slave; | |
1848 | ||
1849 | bond->current_arp_slave = NULL; | |
1850 | ||
1851 | /* release the slave from its bond */ | |
1852 | bond_detach_slave(bond, slave); | |
1853 | ||
8531c5ff AK |
1854 | bond_compute_features(bond); |
1855 | ||
1da177e4 LT |
1856 | if (bond->primary_slave == slave) { |
1857 | bond->primary_slave = NULL; | |
1858 | } | |
1859 | ||
1860 | if (oldcurrent == slave) { | |
1861 | bond_change_active_slave(bond, NULL); | |
1862 | } | |
1863 | ||
58402054 | 1864 | if (bond_is_lb(bond)) { |
1da177e4 LT |
1865 | /* Must be called only after the slave has been |
1866 | * detached from the list and the curr_active_slave | |
1867 | * has been cleared (if our_slave == old_current), | |
1868 | * but before a new active slave is selected. | |
1869 | */ | |
2543331d | 1870 | write_unlock_bh(&bond->lock); |
1da177e4 | 1871 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1872 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1873 | } |
1874 | ||
059fe7a5 JV |
1875 | if (oldcurrent == slave) { |
1876 | /* | |
1877 | * Note that we hold RTNL over this sequence, so there | |
1878 | * is no concern that another slave add/remove event | |
1879 | * will interfere. | |
1880 | */ | |
1881 | write_unlock_bh(&bond->lock); | |
1882 | read_lock(&bond->lock); | |
1883 | write_lock_bh(&bond->curr_slave_lock); | |
1884 | ||
1da177e4 LT |
1885 | bond_select_active_slave(bond); |
1886 | ||
059fe7a5 JV |
1887 | write_unlock_bh(&bond->curr_slave_lock); |
1888 | read_unlock(&bond->lock); | |
1889 | write_lock_bh(&bond->lock); | |
1890 | } | |
1891 | ||
1da177e4 | 1892 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1893 | bond_set_carrier(bond); |
1894 | ||
1da177e4 LT |
1895 | /* if the last slave was removed, zero the mac address |
1896 | * of the master so it will be set by the application | |
1897 | * to the mac address of the first slave | |
1898 | */ | |
1899 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1900 | ||
1901 | if (list_empty(&bond->vlan_list)) { | |
1902 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1903 | } else { | |
1904 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1905 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1906 | "still has VLANs.\n", |
4e0952c7 | 1907 | bond_dev->name, bond_dev->name); |
1da177e4 | 1908 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1909 | ": %s: When re-adding slaves, make sure the bond's " |
1910 | "HW address matches its VLANs'.\n", | |
1911 | bond_dev->name); | |
1da177e4 LT |
1912 | } |
1913 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1914 | !bond_has_challenged_slaves(bond)) { | |
1915 | printk(KERN_INFO DRV_NAME | |
4e0952c7 | 1916 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 1917 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 1918 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
1919 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1920 | } | |
1921 | ||
1922 | write_unlock_bh(&bond->lock); | |
1923 | ||
b76cdba9 MW |
1924 | /* must do this from outside any spinlocks */ |
1925 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1926 | ||
1da177e4 LT |
1927 | bond_del_vlans_from_slave(bond, slave_dev); |
1928 | ||
1929 | /* If the mode USES_PRIMARY, then we should only remove its | |
1930 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1931 | * already taken care of above when we detached the slave | |
1932 | */ | |
1933 | if (!USES_PRIMARY(bond->params.mode)) { | |
1934 | /* unset promiscuity level from slave */ | |
1935 | if (bond_dev->flags & IFF_PROMISC) { | |
1936 | dev_set_promiscuity(slave_dev, -1); | |
1937 | } | |
1938 | ||
1939 | /* unset allmulti level from slave */ | |
1940 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1941 | dev_set_allmulti(slave_dev, -1); | |
1942 | } | |
1943 | ||
1944 | /* flush master's mc_list from slave */ | |
b9e40857 | 1945 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 1946 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 1947 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
1948 | } |
1949 | ||
1950 | netdev_set_master(slave_dev, NULL); | |
1951 | ||
1952 | /* close slave before restoring its mac address */ | |
1953 | dev_close(slave_dev); | |
1954 | ||
3915c1e8 | 1955 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1956 | /* restore original ("permanent") mac address */ |
1957 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1958 | addr.sa_family = slave_dev->type; | |
1959 | dev_set_mac_address(slave_dev, &addr); | |
1960 | } | |
1da177e4 | 1961 | |
8f903c70 | 1962 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1963 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1964 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1965 | |
1966 | kfree(slave); | |
1967 | ||
1968 | return 0; /* deletion OK */ | |
1969 | } | |
1970 | ||
d90a162a MS |
1971 | /* |
1972 | * Destroy a bonding device. | |
1973 | * Must be under rtnl_lock when this function is called. | |
1974 | */ | |
1975 | void bond_destroy(struct bonding *bond) | |
1976 | { | |
1977 | bond_deinit(bond->dev); | |
1978 | bond_destroy_sysfs_entry(bond); | |
8cbdeec6 | 1979 | unregister_netdevice(bond->dev); |
d90a162a MS |
1980 | } |
1981 | ||
a434e43f JV |
1982 | static void bond_destructor(struct net_device *bond_dev) |
1983 | { | |
244ef9b9 | 1984 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f JV |
1985 | |
1986 | if (bond->wq) | |
1987 | destroy_workqueue(bond->wq); | |
1988 | ||
1989 | netif_addr_lock_bh(bond_dev); | |
1990 | bond_mc_list_destroy(bond); | |
1991 | netif_addr_unlock_bh(bond_dev); | |
1992 | ||
1993 | free_netdev(bond_dev); | |
1994 | } | |
1995 | ||
d90a162a MS |
1996 | /* |
1997 | * First release a slave and than destroy the bond if no more slaves iare left. | |
1998 | * Must be under rtnl_lock when this function is called. | |
1999 | */ | |
2000 | int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev) | |
2001 | { | |
454d7c9b | 2002 | struct bonding *bond = netdev_priv(bond_dev); |
d90a162a MS |
2003 | int ret; |
2004 | ||
2005 | ret = bond_release(bond_dev, slave_dev); | |
2006 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
2007 | printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n", | |
2008 | bond_dev->name, bond_dev->name); | |
2009 | bond_destroy(bond); | |
2010 | } | |
2011 | return ret; | |
2012 | } | |
2013 | ||
1da177e4 LT |
2014 | /* |
2015 | * This function releases all slaves. | |
2016 | */ | |
2017 | static int bond_release_all(struct net_device *bond_dev) | |
2018 | { | |
454d7c9b | 2019 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2020 | struct slave *slave; |
2021 | struct net_device *slave_dev; | |
2022 | struct sockaddr addr; | |
2023 | ||
2024 | write_lock_bh(&bond->lock); | |
2025 | ||
ff59c456 JV |
2026 | netif_carrier_off(bond_dev); |
2027 | ||
1da177e4 LT |
2028 | if (bond->slave_cnt == 0) { |
2029 | goto out; | |
2030 | } | |
2031 | ||
2032 | bond->current_arp_slave = NULL; | |
2033 | bond->primary_slave = NULL; | |
2034 | bond_change_active_slave(bond, NULL); | |
2035 | ||
2036 | while ((slave = bond->first_slave) != NULL) { | |
2037 | /* Inform AD package of unbinding of slave | |
2038 | * before slave is detached from the list. | |
2039 | */ | |
2040 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2041 | bond_3ad_unbind_slave(slave); | |
2042 | } | |
2043 | ||
2044 | slave_dev = slave->dev; | |
2045 | bond_detach_slave(bond, slave); | |
2046 | ||
2543331d JV |
2047 | /* now that the slave is detached, unlock and perform |
2048 | * all the undo steps that should not be called from | |
2049 | * within a lock. | |
2050 | */ | |
2051 | write_unlock_bh(&bond->lock); | |
2052 | ||
58402054 | 2053 | if (bond_is_lb(bond)) { |
1da177e4 LT |
2054 | /* must be called only after the slave |
2055 | * has been detached from the list | |
2056 | */ | |
2057 | bond_alb_deinit_slave(bond, slave); | |
2058 | } | |
2059 | ||
8531c5ff AK |
2060 | bond_compute_features(bond); |
2061 | ||
b76cdba9 | 2062 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2063 | bond_del_vlans_from_slave(bond, slave_dev); |
2064 | ||
2065 | /* If the mode USES_PRIMARY, then we should only remove its | |
2066 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2067 | * already taken care of above when we detached the slave | |
2068 | */ | |
2069 | if (!USES_PRIMARY(bond->params.mode)) { | |
2070 | /* unset promiscuity level from slave */ | |
2071 | if (bond_dev->flags & IFF_PROMISC) { | |
2072 | dev_set_promiscuity(slave_dev, -1); | |
2073 | } | |
2074 | ||
2075 | /* unset allmulti level from slave */ | |
2076 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2077 | dev_set_allmulti(slave_dev, -1); | |
2078 | } | |
2079 | ||
2080 | /* flush master's mc_list from slave */ | |
b9e40857 | 2081 | netif_addr_lock_bh(bond_dev); |
1da177e4 | 2082 | bond_mc_list_flush(bond_dev, slave_dev); |
b9e40857 | 2083 | netif_addr_unlock_bh(bond_dev); |
1da177e4 LT |
2084 | } |
2085 | ||
2086 | netdev_set_master(slave_dev, NULL); | |
2087 | ||
2088 | /* close slave before restoring its mac address */ | |
2089 | dev_close(slave_dev); | |
2090 | ||
dd957c57 | 2091 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2092 | /* restore original ("permanent") mac address*/ |
2093 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2094 | addr.sa_family = slave_dev->type; | |
2095 | dev_set_mac_address(slave_dev, &addr); | |
2096 | } | |
1da177e4 | 2097 | |
8f903c70 JV |
2098 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
2099 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
2100 | |
2101 | kfree(slave); | |
2102 | ||
2103 | /* re-acquire the lock before getting the next slave */ | |
2104 | write_lock_bh(&bond->lock); | |
2105 | } | |
2106 | ||
2107 | /* zero the mac address of the master so it will be | |
2108 | * set by the application to the mac address of the | |
2109 | * first slave | |
2110 | */ | |
2111 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2112 | ||
2113 | if (list_empty(&bond->vlan_list)) { | |
2114 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2115 | } else { | |
2116 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 2117 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 2118 | "still has VLANs.\n", |
4e0952c7 | 2119 | bond_dev->name, bond_dev->name); |
1da177e4 | 2120 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
2121 | ": %s: When re-adding slaves, make sure the bond's " |
2122 | "HW address matches its VLANs'.\n", | |
2123 | bond_dev->name); | |
1da177e4 LT |
2124 | } |
2125 | ||
2126 | printk(KERN_INFO DRV_NAME | |
2127 | ": %s: released all slaves\n", | |
2128 | bond_dev->name); | |
2129 | ||
2130 | out: | |
2131 | write_unlock_bh(&bond->lock); | |
2132 | ||
2133 | return 0; | |
2134 | } | |
2135 | ||
2136 | /* | |
2137 | * This function changes the active slave to slave <slave_dev>. | |
2138 | * It returns -EINVAL in the following cases. | |
2139 | * - <slave_dev> is not found in the list. | |
2140 | * - There is not active slave now. | |
2141 | * - <slave_dev> is already active. | |
2142 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2143 | * - <slave_dev> is not running. | |
2144 | * In these cases, this fuction does nothing. | |
2145 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
2146 | */ | |
2147 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2148 | { | |
454d7c9b | 2149 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2150 | struct slave *old_active = NULL; |
2151 | struct slave *new_active = NULL; | |
2152 | int res = 0; | |
2153 | ||
2154 | if (!USES_PRIMARY(bond->params.mode)) { | |
2155 | return -EINVAL; | |
2156 | } | |
2157 | ||
2158 | /* Verify that master_dev is indeed the master of slave_dev */ | |
2159 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2160 | (slave_dev->master != bond_dev)) { | |
2161 | return -EINVAL; | |
2162 | } | |
2163 | ||
059fe7a5 | 2164 | read_lock(&bond->lock); |
1da177e4 | 2165 | |
059fe7a5 | 2166 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2167 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2168 | read_unlock(&bond->curr_slave_lock); |
2169 | ||
1da177e4 LT |
2170 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2171 | ||
2172 | /* | |
2173 | * Changing to the current active: do nothing; return success. | |
2174 | */ | |
2175 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2176 | read_unlock(&bond->lock); |
1da177e4 LT |
2177 | return 0; |
2178 | } | |
2179 | ||
2180 | if ((new_active) && | |
2181 | (old_active) && | |
2182 | (new_active->link == BOND_LINK_UP) && | |
2183 | IS_UP(new_active->dev)) { | |
059fe7a5 | 2184 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2185 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2186 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2187 | } else { |
2188 | res = -EINVAL; | |
2189 | } | |
2190 | ||
059fe7a5 | 2191 | read_unlock(&bond->lock); |
1da177e4 LT |
2192 | |
2193 | return res; | |
2194 | } | |
2195 | ||
1da177e4 LT |
2196 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2197 | { | |
454d7c9b | 2198 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2199 | |
2200 | info->bond_mode = bond->params.mode; | |
2201 | info->miimon = bond->params.miimon; | |
2202 | ||
6603a6f2 | 2203 | read_lock(&bond->lock); |
1da177e4 | 2204 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2205 | read_unlock(&bond->lock); |
1da177e4 LT |
2206 | |
2207 | return 0; | |
2208 | } | |
2209 | ||
2210 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2211 | { | |
454d7c9b | 2212 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
2213 | struct slave *slave; |
2214 | int i, found = 0; | |
2215 | ||
2216 | if (info->slave_id < 0) { | |
2217 | return -ENODEV; | |
2218 | } | |
2219 | ||
6603a6f2 | 2220 | read_lock(&bond->lock); |
1da177e4 LT |
2221 | |
2222 | bond_for_each_slave(bond, slave, i) { | |
2223 | if (i == (int)info->slave_id) { | |
2224 | found = 1; | |
2225 | break; | |
2226 | } | |
2227 | } | |
2228 | ||
6603a6f2 | 2229 | read_unlock(&bond->lock); |
1da177e4 LT |
2230 | |
2231 | if (found) { | |
2232 | strcpy(info->slave_name, slave->dev->name); | |
2233 | info->link = slave->link; | |
2234 | info->state = slave->state; | |
2235 | info->link_failure_count = slave->link_failure_count; | |
2236 | } else { | |
2237 | return -ENODEV; | |
2238 | } | |
2239 | ||
2240 | return 0; | |
2241 | } | |
2242 | ||
2243 | /*-------------------------------- Monitoring -------------------------------*/ | |
2244 | ||
1da177e4 | 2245 | |
f0c76d61 JV |
2246 | static int bond_miimon_inspect(struct bonding *bond) |
2247 | { | |
2248 | struct slave *slave; | |
2249 | int i, link_state, commit = 0; | |
1da177e4 LT |
2250 | |
2251 | bond_for_each_slave(bond, slave, i) { | |
f0c76d61 | 2252 | slave->new_link = BOND_LINK_NOCHANGE; |
1da177e4 | 2253 | |
f0c76d61 | 2254 | link_state = bond_check_dev_link(bond, slave->dev, 0); |
1da177e4 LT |
2255 | |
2256 | switch (slave->link) { | |
f0c76d61 JV |
2257 | case BOND_LINK_UP: |
2258 | if (link_state) | |
2259 | continue; | |
1da177e4 | 2260 | |
f0c76d61 JV |
2261 | slave->link = BOND_LINK_FAIL; |
2262 | slave->delay = bond->params.downdelay; | |
2263 | if (slave->delay) { | |
2264 | printk(KERN_INFO DRV_NAME | |
2265 | ": %s: link status down for %s" | |
2266 | "interface %s, disabling it in %d ms.\n", | |
2267 | bond->dev->name, | |
2268 | (bond->params.mode == | |
2269 | BOND_MODE_ACTIVEBACKUP) ? | |
2270 | ((slave->state == BOND_STATE_ACTIVE) ? | |
2271 | "active " : "backup ") : "", | |
2272 | slave->dev->name, | |
2273 | bond->params.downdelay * bond->params.miimon); | |
1da177e4 | 2274 | } |
f0c76d61 JV |
2275 | /*FALLTHRU*/ |
2276 | case BOND_LINK_FAIL: | |
2277 | if (link_state) { | |
2278 | /* | |
2279 | * recovered before downdelay expired | |
2280 | */ | |
2281 | slave->link = BOND_LINK_UP; | |
1da177e4 LT |
2282 | slave->jiffies = jiffies; |
2283 | printk(KERN_INFO DRV_NAME | |
2284 | ": %s: link status up again after %d " | |
2285 | "ms for interface %s.\n", | |
1b76b316 | 2286 | bond->dev->name, |
f0c76d61 JV |
2287 | (bond->params.downdelay - slave->delay) * |
2288 | bond->params.miimon, | |
2289 | slave->dev->name); | |
2290 | continue; | |
1da177e4 | 2291 | } |
f0c76d61 JV |
2292 | |
2293 | if (slave->delay <= 0) { | |
2294 | slave->new_link = BOND_LINK_DOWN; | |
2295 | commit++; | |
2296 | continue; | |
1da177e4 | 2297 | } |
1da177e4 | 2298 | |
f0c76d61 JV |
2299 | slave->delay--; |
2300 | break; | |
2301 | ||
2302 | case BOND_LINK_DOWN: | |
2303 | if (!link_state) | |
2304 | continue; | |
2305 | ||
2306 | slave->link = BOND_LINK_BACK; | |
2307 | slave->delay = bond->params.updelay; | |
2308 | ||
2309 | if (slave->delay) { | |
2310 | printk(KERN_INFO DRV_NAME | |
2311 | ": %s: link status up for " | |
2312 | "interface %s, enabling it in %d ms.\n", | |
2313 | bond->dev->name, slave->dev->name, | |
2314 | bond->params.updelay * | |
2315 | bond->params.miimon); | |
2316 | } | |
2317 | /*FALLTHRU*/ | |
2318 | case BOND_LINK_BACK: | |
2319 | if (!link_state) { | |
2320 | slave->link = BOND_LINK_DOWN; | |
1da177e4 LT |
2321 | printk(KERN_INFO DRV_NAME |
2322 | ": %s: link status down again after %d " | |
2323 | "ms for interface %s.\n", | |
1b76b316 | 2324 | bond->dev->name, |
f0c76d61 JV |
2325 | (bond->params.updelay - slave->delay) * |
2326 | bond->params.miimon, | |
2327 | slave->dev->name); | |
2328 | ||
2329 | continue; | |
2330 | } | |
2331 | ||
2332 | if (slave->delay <= 0) { | |
2333 | slave->new_link = BOND_LINK_UP; | |
2334 | commit++; | |
2335 | continue; | |
1da177e4 | 2336 | } |
f0c76d61 JV |
2337 | |
2338 | slave->delay--; | |
1da177e4 | 2339 | break; |
f0c76d61 JV |
2340 | } |
2341 | } | |
1da177e4 | 2342 | |
f0c76d61 JV |
2343 | return commit; |
2344 | } | |
1da177e4 | 2345 | |
f0c76d61 JV |
2346 | static void bond_miimon_commit(struct bonding *bond) |
2347 | { | |
2348 | struct slave *slave; | |
2349 | int i; | |
2350 | ||
2351 | bond_for_each_slave(bond, slave, i) { | |
2352 | switch (slave->new_link) { | |
2353 | case BOND_LINK_NOCHANGE: | |
2354 | continue; | |
1da177e4 | 2355 | |
f0c76d61 JV |
2356 | case BOND_LINK_UP: |
2357 | slave->link = BOND_LINK_UP; | |
2358 | slave->jiffies = jiffies; | |
2359 | ||
2360 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2361 | /* prevent it from being the active one */ | |
2362 | slave->state = BOND_STATE_BACKUP; | |
2363 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2364 | /* make it immediately active */ | |
2365 | slave->state = BOND_STATE_ACTIVE; | |
2366 | } else if (slave != bond->primary_slave) { | |
2367 | /* prevent it from being the active one */ | |
2368 | slave->state = BOND_STATE_BACKUP; | |
1da177e4 | 2369 | } |
1da177e4 | 2370 | |
f0c76d61 JV |
2371 | printk(KERN_INFO DRV_NAME |
2372 | ": %s: link status definitely " | |
2373 | "up for interface %s.\n", | |
2374 | bond->dev->name, slave->dev->name); | |
1da177e4 | 2375 | |
f0c76d61 JV |
2376 | /* notify ad that the link status has changed */ |
2377 | if (bond->params.mode == BOND_MODE_8023AD) | |
2378 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
059fe7a5 | 2379 | |
58402054 | 2380 | if (bond_is_lb(bond)) |
f0c76d61 JV |
2381 | bond_alb_handle_link_change(bond, slave, |
2382 | BOND_LINK_UP); | |
1da177e4 | 2383 | |
f0c76d61 JV |
2384 | if (!bond->curr_active_slave || |
2385 | (slave == bond->primary_slave)) | |
2386 | goto do_failover; | |
1da177e4 | 2387 | |
f0c76d61 | 2388 | continue; |
059fe7a5 | 2389 | |
f0c76d61 | 2390 | case BOND_LINK_DOWN: |
fba4acda JV |
2391 | if (slave->link_failure_count < UINT_MAX) |
2392 | slave->link_failure_count++; | |
2393 | ||
f0c76d61 | 2394 | slave->link = BOND_LINK_DOWN; |
1da177e4 | 2395 | |
f0c76d61 JV |
2396 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP || |
2397 | bond->params.mode == BOND_MODE_8023AD) | |
2398 | bond_set_slave_inactive_flags(slave); | |
2399 | ||
2400 | printk(KERN_INFO DRV_NAME | |
2401 | ": %s: link status definitely down for " | |
2402 | "interface %s, disabling it\n", | |
2403 | bond->dev->name, slave->dev->name); | |
2404 | ||
2405 | if (bond->params.mode == BOND_MODE_8023AD) | |
2406 | bond_3ad_handle_link_change(slave, | |
2407 | BOND_LINK_DOWN); | |
2408 | ||
2409 | if (bond->params.mode == BOND_MODE_TLB || | |
2410 | bond->params.mode == BOND_MODE_ALB) | |
2411 | bond_alb_handle_link_change(bond, slave, | |
2412 | BOND_LINK_DOWN); | |
2413 | ||
2414 | if (slave == bond->curr_active_slave) | |
2415 | goto do_failover; | |
2416 | ||
2417 | continue; | |
2418 | ||
2419 | default: | |
2420 | printk(KERN_ERR DRV_NAME | |
2421 | ": %s: invalid new link %d on slave %s\n", | |
2422 | bond->dev->name, slave->new_link, | |
2423 | slave->dev->name); | |
2424 | slave->new_link = BOND_LINK_NOCHANGE; | |
2425 | ||
2426 | continue; | |
2427 | } | |
2428 | ||
2429 | do_failover: | |
2430 | ASSERT_RTNL(); | |
2431 | write_lock_bh(&bond->curr_slave_lock); | |
2432 | bond_select_active_slave(bond); | |
2433 | write_unlock_bh(&bond->curr_slave_lock); | |
2434 | } | |
2435 | ||
2436 | bond_set_carrier(bond); | |
1da177e4 LT |
2437 | } |
2438 | ||
0b0eef66 JV |
2439 | /* |
2440 | * bond_mii_monitor | |
2441 | * | |
2442 | * Really a wrapper that splits the mii monitor into two phases: an | |
f0c76d61 JV |
2443 | * inspection, then (if inspection indicates something needs to be done) |
2444 | * an acquisition of appropriate locks followed by a commit phase to | |
2445 | * implement whatever link state changes are indicated. | |
0b0eef66 JV |
2446 | */ |
2447 | void bond_mii_monitor(struct work_struct *work) | |
2448 | { | |
2449 | struct bonding *bond = container_of(work, struct bonding, | |
2450 | mii_work.work); | |
0b0eef66 JV |
2451 | |
2452 | read_lock(&bond->lock); | |
f0c76d61 JV |
2453 | if (bond->kill_timers) |
2454 | goto out; | |
2455 | ||
2456 | if (bond->slave_cnt == 0) | |
2457 | goto re_arm; | |
b59f9f74 JV |
2458 | |
2459 | if (bond->send_grat_arp) { | |
2460 | read_lock(&bond->curr_slave_lock); | |
2461 | bond_send_gratuitous_arp(bond); | |
2462 | read_unlock(&bond->curr_slave_lock); | |
2463 | } | |
2464 | ||
305d552a BH |
2465 | if (bond->send_unsol_na) { |
2466 | read_lock(&bond->curr_slave_lock); | |
2467 | bond_send_unsolicited_na(bond); | |
2468 | read_unlock(&bond->curr_slave_lock); | |
2469 | } | |
2470 | ||
f0c76d61 | 2471 | if (bond_miimon_inspect(bond)) { |
0b0eef66 JV |
2472 | read_unlock(&bond->lock); |
2473 | rtnl_lock(); | |
2474 | read_lock(&bond->lock); | |
f0c76d61 JV |
2475 | |
2476 | bond_miimon_commit(bond); | |
2477 | ||
5655662d JV |
2478 | read_unlock(&bond->lock); |
2479 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2480 | read_lock(&bond->lock); | |
0b0eef66 JV |
2481 | } |
2482 | ||
f0c76d61 JV |
2483 | re_arm: |
2484 | if (bond->params.miimon) | |
2485 | queue_delayed_work(bond->wq, &bond->mii_work, | |
2486 | msecs_to_jiffies(bond->params.miimon)); | |
2487 | out: | |
0b0eef66 | 2488 | read_unlock(&bond->lock); |
0b0eef66 | 2489 | } |
c3ade5ca | 2490 | |
d3bb52b0 | 2491 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2492 | { |
2493 | struct in_device *idev; | |
2494 | struct in_ifaddr *ifa; | |
a144ea4b | 2495 | __be32 addr = 0; |
c3ade5ca JV |
2496 | |
2497 | if (!dev) | |
2498 | return 0; | |
2499 | ||
2500 | rcu_read_lock(); | |
e5ed6399 | 2501 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2502 | if (!idev) |
2503 | goto out; | |
2504 | ||
2505 | ifa = idev->ifa_list; | |
2506 | if (!ifa) | |
2507 | goto out; | |
2508 | ||
2509 | addr = ifa->ifa_local; | |
2510 | out: | |
2511 | rcu_read_unlock(); | |
2512 | return addr; | |
2513 | } | |
2514 | ||
d3bb52b0 | 2515 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2516 | { |
0883beca | 2517 | struct vlan_entry *vlan; |
f5b2b966 JV |
2518 | |
2519 | if (ip == bond->master_ip) | |
2520 | return 1; | |
2521 | ||
0883beca | 2522 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2523 | if (ip == vlan->vlan_ip) |
2524 | return 1; | |
2525 | } | |
2526 | ||
2527 | return 0; | |
2528 | } | |
2529 | ||
c3ade5ca JV |
2530 | /* |
2531 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2532 | * switches in VLAN mode (especially if ports are configured as | |
2533 | * "native" to a VLAN) might not pass non-tagged frames. | |
2534 | */ | |
d3bb52b0 | 2535 | 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 |
2536 | { |
2537 | struct sk_buff *skb; | |
2538 | ||
2539 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2540 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2541 | ||
2542 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2543 | NULL, slave_dev->dev_addr, NULL); | |
2544 | ||
2545 | if (!skb) { | |
2546 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2547 | return; | |
2548 | } | |
2549 | if (vlan_id) { | |
2550 | skb = vlan_put_tag(skb, vlan_id); | |
2551 | if (!skb) { | |
2552 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2553 | return; | |
2554 | } | |
2555 | } | |
2556 | arp_xmit(skb); | |
2557 | } | |
2558 | ||
2559 | ||
1da177e4 LT |
2560 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2561 | { | |
c3ade5ca | 2562 | int i, vlan_id, rv; |
d3bb52b0 | 2563 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2564 | struct vlan_entry *vlan; |
c3ade5ca JV |
2565 | struct net_device *vlan_dev; |
2566 | struct flowi fl; | |
2567 | struct rtable *rt; | |
1da177e4 | 2568 | |
6b780567 MW |
2569 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2570 | if (!targets[i]) | |
2571 | continue; | |
c3ade5ca JV |
2572 | dprintk("basa: target %x\n", targets[i]); |
2573 | if (list_empty(&bond->vlan_list)) { | |
2574 | dprintk("basa: empty vlan: arp_send\n"); | |
2575 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2576 | bond->master_ip, 0); | |
2577 | continue; | |
2578 | } | |
2579 | ||
2580 | /* | |
2581 | * If VLANs are configured, we do a route lookup to | |
2582 | * determine which VLAN interface would be used, so we | |
2583 | * can tag the ARP with the proper VLAN tag. | |
2584 | */ | |
2585 | memset(&fl, 0, sizeof(fl)); | |
2586 | fl.fl4_dst = targets[i]; | |
2587 | fl.fl4_tos = RTO_ONLINK; | |
2588 | ||
f206351a | 2589 | rv = ip_route_output_key(&init_net, &rt, &fl); |
c3ade5ca JV |
2590 | if (rv) { |
2591 | if (net_ratelimit()) { | |
2592 | printk(KERN_WARNING DRV_NAME | |
63779436 HH |
2593 | ": %s: no route to arp_ip_target %pI4\n", |
2594 | bond->dev->name, &fl.fl4_dst); | |
c3ade5ca JV |
2595 | } |
2596 | continue; | |
2597 | } | |
2598 | ||
2599 | /* | |
2600 | * This target is not on a VLAN | |
2601 | */ | |
2602 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2603 | ip_rt_put(rt); |
c3ade5ca JV |
2604 | dprintk("basa: rtdev == bond->dev: arp_send\n"); |
2605 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2606 | bond->master_ip, 0); | |
2607 | continue; | |
2608 | } | |
2609 | ||
2610 | vlan_id = 0; | |
0883beca | 2611 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2612 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2613 | if (vlan_dev == rt->u.dst.dev) { |
2614 | vlan_id = vlan->vlan_id; | |
2615 | dprintk("basa: vlan match on %s %d\n", | |
2616 | vlan_dev->name, vlan_id); | |
2617 | break; | |
2618 | } | |
2619 | } | |
2620 | ||
2621 | if (vlan_id) { | |
ed4b9f80 | 2622 | ip_rt_put(rt); |
c3ade5ca JV |
2623 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2624 | vlan->vlan_ip, vlan_id); | |
2625 | continue; | |
2626 | } | |
2627 | ||
2628 | if (net_ratelimit()) { | |
2629 | printk(KERN_WARNING DRV_NAME | |
63779436 HH |
2630 | ": %s: no path to arp_ip_target %pI4 via rt.dev %s\n", |
2631 | bond->dev->name, &fl.fl4_dst, | |
c3ade5ca JV |
2632 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); |
2633 | } | |
ed4b9f80 | 2634 | ip_rt_put(rt); |
c3ade5ca JV |
2635 | } |
2636 | } | |
2637 | ||
2638 | /* | |
2639 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2640 | * for each VLAN above us. | |
b59f9f74 JV |
2641 | * |
2642 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2643 | */ |
2644 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2645 | { | |
2646 | struct slave *slave = bond->curr_active_slave; | |
2647 | struct vlan_entry *vlan; | |
2648 | struct net_device *vlan_dev; | |
2649 | ||
2650 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2651 | slave ? slave->dev->name : "NULL"); | |
b59f9f74 JV |
2652 | |
2653 | if (!slave || !bond->send_grat_arp || | |
2654 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2655 | return; |
2656 | ||
b59f9f74 JV |
2657 | bond->send_grat_arp--; |
2658 | ||
c3ade5ca JV |
2659 | if (bond->master_ip) { |
2660 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2661 | bond->master_ip, 0); |
c3ade5ca JV |
2662 | } |
2663 | ||
2664 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
5c15bdec | 2665 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2666 | if (vlan->vlan_ip) { |
2667 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2668 | vlan->vlan_ip, vlan->vlan_id); | |
2669 | } | |
1da177e4 LT |
2670 | } |
2671 | } | |
2672 | ||
d3bb52b0 | 2673 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2674 | { |
2675 | int i; | |
d3bb52b0 | 2676 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 JV |
2677 | |
2678 | targets = bond->params.arp_targets; | |
2679 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
63779436 HH |
2680 | dprintk("bva: sip %pI4 tip %pI4 t[%d] %pI4 bhti(tip) %d\n", |
2681 | &sip, &tip, i, &targets[i], bond_has_this_ip(bond, tip)); | |
f5b2b966 JV |
2682 | if (sip == targets[i]) { |
2683 | if (bond_has_this_ip(bond, tip)) | |
2684 | slave->last_arp_rx = jiffies; | |
2685 | return; | |
2686 | } | |
2687 | } | |
2688 | } | |
2689 | ||
2690 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2691 | { | |
2692 | struct arphdr *arp; | |
2693 | struct slave *slave; | |
2694 | struct bonding *bond; | |
2695 | unsigned char *arp_ptr; | |
d3bb52b0 | 2696 | __be32 sip, tip; |
f5b2b966 | 2697 | |
c346dca1 | 2698 | if (dev_net(dev) != &init_net) |
e730c155 EB |
2699 | goto out; |
2700 | ||
f5b2b966 JV |
2701 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2702 | goto out; | |
2703 | ||
454d7c9b | 2704 | bond = netdev_priv(dev); |
f5b2b966 JV |
2705 | read_lock(&bond->lock); |
2706 | ||
2707 | dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", | |
2708 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", | |
2709 | orig_dev ? orig_dev->name : "NULL"); | |
2710 | ||
2711 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2712 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2713 | goto out_unlock; | |
2714 | ||
988b7050 | 2715 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2716 | goto out_unlock; |
2717 | ||
d0a92be0 | 2718 | arp = arp_hdr(skb); |
f5b2b966 JV |
2719 | if (arp->ar_hln != dev->addr_len || |
2720 | skb->pkt_type == PACKET_OTHERHOST || | |
2721 | skb->pkt_type == PACKET_LOOPBACK || | |
2722 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2723 | arp->ar_pro != htons(ETH_P_IP) || | |
2724 | arp->ar_pln != 4) | |
2725 | goto out_unlock; | |
2726 | ||
2727 | arp_ptr = (unsigned char *)(arp + 1); | |
2728 | arp_ptr += dev->addr_len; | |
2729 | memcpy(&sip, arp_ptr, 4); | |
2730 | arp_ptr += 4 + dev->addr_len; | |
2731 | memcpy(&tip, arp_ptr, 4); | |
2732 | ||
63779436 HH |
2733 | dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %pI4 tip %pI4\n", |
2734 | bond->dev->name, slave->dev->name, slave->state, | |
2735 | bond->params.arp_validate, slave_do_arp_validate(bond, slave), | |
2736 | &sip, &tip); | |
f5b2b966 JV |
2737 | |
2738 | /* | |
2739 | * Backup slaves won't see the ARP reply, but do come through | |
2740 | * here for each ARP probe (so we swap the sip/tip to validate | |
2741 | * the probe). In a "redundant switch, common router" type of | |
2742 | * configuration, the ARP probe will (hopefully) travel from | |
2743 | * the active, through one switch, the router, then the other | |
2744 | * switch before reaching the backup. | |
2745 | */ | |
2746 | if (slave->state == BOND_STATE_ACTIVE) | |
2747 | bond_validate_arp(bond, slave, sip, tip); | |
2748 | else | |
2749 | bond_validate_arp(bond, slave, tip, sip); | |
2750 | ||
2751 | out_unlock: | |
2752 | read_unlock(&bond->lock); | |
2753 | out: | |
2754 | dev_kfree_skb(skb); | |
2755 | return NET_RX_SUCCESS; | |
2756 | } | |
2757 | ||
1da177e4 LT |
2758 | /* |
2759 | * this function is called regularly to monitor each slave's link | |
2760 | * ensuring that traffic is being sent and received when arp monitoring | |
2761 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2762 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2763 | * arp monitoring in active backup mode. | |
2764 | */ | |
1b76b316 | 2765 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2766 | { |
1b76b316 JV |
2767 | struct bonding *bond = container_of(work, struct bonding, |
2768 | arp_work.work); | |
1da177e4 LT |
2769 | struct slave *slave, *oldcurrent; |
2770 | int do_failover = 0; | |
2771 | int delta_in_ticks; | |
2772 | int i; | |
2773 | ||
2774 | read_lock(&bond->lock); | |
2775 | ||
5ce0da8f | 2776 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 LT |
2777 | |
2778 | if (bond->kill_timers) { | |
2779 | goto out; | |
2780 | } | |
2781 | ||
2782 | if (bond->slave_cnt == 0) { | |
2783 | goto re_arm; | |
2784 | } | |
2785 | ||
2786 | read_lock(&bond->curr_slave_lock); | |
2787 | oldcurrent = bond->curr_active_slave; | |
2788 | read_unlock(&bond->curr_slave_lock); | |
2789 | ||
2790 | /* see if any of the previous devices are up now (i.e. they have | |
2791 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2792 | * the picture unless it is null. also, slave->jiffies is not needed | |
2793 | * here because we send an arp on each slave and give a slave as | |
2794 | * long as it needs to get the tx/rx within the delta. | |
2795 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2796 | * so it can wait | |
2797 | */ | |
2798 | bond_for_each_slave(bond, slave, i) { | |
2799 | if (slave->link != BOND_LINK_UP) { | |
b63bb739 DS |
2800 | if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) && |
2801 | time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2802 | |
2803 | slave->link = BOND_LINK_UP; | |
2804 | slave->state = BOND_STATE_ACTIVE; | |
2805 | ||
2806 | /* primary_slave has no meaning in round-robin | |
2807 | * mode. the window of a slave being up and | |
2808 | * curr_active_slave being null after enslaving | |
2809 | * is closed. | |
2810 | */ | |
2811 | if (!oldcurrent) { | |
2812 | printk(KERN_INFO DRV_NAME | |
2813 | ": %s: link status definitely " | |
2814 | "up for interface %s, ", | |
1b76b316 | 2815 | bond->dev->name, |
1da177e4 LT |
2816 | slave->dev->name); |
2817 | do_failover = 1; | |
2818 | } else { | |
2819 | printk(KERN_INFO DRV_NAME | |
2820 | ": %s: interface %s is now up\n", | |
1b76b316 | 2821 | bond->dev->name, |
1da177e4 LT |
2822 | slave->dev->name); |
2823 | } | |
2824 | } | |
2825 | } else { | |
2826 | /* slave->link == BOND_LINK_UP */ | |
2827 | ||
2828 | /* not all switches will respond to an arp request | |
2829 | * when the source ip is 0, so don't take the link down | |
2830 | * if we don't know our ip yet | |
2831 | */ | |
b63bb739 | 2832 | if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) || |
4b8a9239 | 2833 | (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) { |
1da177e4 LT |
2834 | |
2835 | slave->link = BOND_LINK_DOWN; | |
2836 | slave->state = BOND_STATE_BACKUP; | |
2837 | ||
2838 | if (slave->link_failure_count < UINT_MAX) { | |
2839 | slave->link_failure_count++; | |
2840 | } | |
2841 | ||
2842 | printk(KERN_INFO DRV_NAME | |
2843 | ": %s: interface %s is now down.\n", | |
1b76b316 | 2844 | bond->dev->name, |
1da177e4 LT |
2845 | slave->dev->name); |
2846 | ||
2847 | if (slave == oldcurrent) { | |
2848 | do_failover = 1; | |
2849 | } | |
2850 | } | |
2851 | } | |
2852 | ||
2853 | /* note: if switch is in round-robin mode, all links | |
2854 | * must tx arp to ensure all links rx an arp - otherwise | |
2855 | * links may oscillate or not come up at all; if switch is | |
2856 | * in something like xor mode, there is nothing we can | |
2857 | * do - all replies will be rx'ed on same link causing slaves | |
2858 | * to be unstable during low/no traffic periods | |
2859 | */ | |
2860 | if (IS_UP(slave->dev)) { | |
2861 | bond_arp_send_all(bond, slave); | |
2862 | } | |
2863 | } | |
2864 | ||
2865 | if (do_failover) { | |
059fe7a5 | 2866 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2867 | |
2868 | bond_select_active_slave(bond); | |
2869 | ||
059fe7a5 | 2870 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2871 | } |
2872 | ||
2873 | re_arm: | |
1b76b316 JV |
2874 | if (bond->params.arp_interval) |
2875 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2876 | out: |
2877 | read_unlock(&bond->lock); | |
2878 | } | |
2879 | ||
2880 | /* | |
b2220cad JV |
2881 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2882 | * changes. Sets new_link in slaves to specify what action should take | |
2883 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2884 | * to link states must be committed. | |
2885 | * | |
2886 | * Called with bond->lock held for read. | |
1da177e4 | 2887 | */ |
b2220cad | 2888 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2889 | { |
1da177e4 | 2890 | struct slave *slave; |
b2220cad | 2891 | int i, commit = 0; |
1da177e4 | 2892 | |
b2220cad JV |
2893 | bond_for_each_slave(bond, slave, i) { |
2894 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2895 | |
b2220cad JV |
2896 | if (slave->link != BOND_LINK_UP) { |
2897 | if (time_before_eq(jiffies, slave_last_rx(bond, slave) + | |
2898 | delta_in_ticks)) { | |
2899 | slave->new_link = BOND_LINK_UP; | |
2900 | commit++; | |
2901 | } | |
1da177e4 | 2902 | |
b2220cad JV |
2903 | continue; |
2904 | } | |
1da177e4 | 2905 | |
b2220cad JV |
2906 | /* |
2907 | * Give slaves 2*delta after being enslaved or made | |
2908 | * active. This avoids bouncing, as the last receive | |
2909 | * times need a full ARP monitor cycle to be updated. | |
2910 | */ | |
2911 | if (!time_after_eq(jiffies, slave->jiffies + | |
2912 | 2 * delta_in_ticks)) | |
2913 | continue; | |
2914 | ||
2915 | /* | |
2916 | * Backup slave is down if: | |
2917 | * - No current_arp_slave AND | |
2918 | * - more than 3*delta since last receive AND | |
2919 | * - the bond has an IP address | |
2920 | * | |
2921 | * Note: a non-null current_arp_slave indicates | |
2922 | * the curr_active_slave went down and we are | |
2923 | * searching for a new one; under this condition | |
2924 | * we only take the curr_active_slave down - this | |
2925 | * gives each slave a chance to tx/rx traffic | |
2926 | * before being taken out | |
2927 | */ | |
2928 | if (slave->state == BOND_STATE_BACKUP && | |
2929 | !bond->current_arp_slave && | |
2930 | time_after(jiffies, slave_last_rx(bond, slave) + | |
2931 | 3 * delta_in_ticks)) { | |
2932 | slave->new_link = BOND_LINK_DOWN; | |
2933 | commit++; | |
2934 | } | |
2935 | ||
2936 | /* | |
2937 | * Active slave is down if: | |
2938 | * - more than 2*delta since transmitting OR | |
2939 | * - (more than 2*delta since receive AND | |
2940 | * the bond has an IP address) | |
2941 | */ | |
2942 | if ((slave->state == BOND_STATE_ACTIVE) && | |
2943 | (time_after_eq(jiffies, slave->dev->trans_start + | |
2944 | 2 * delta_in_ticks) || | |
2945 | (time_after_eq(jiffies, slave_last_rx(bond, slave) | |
2946 | + 2 * delta_in_ticks)))) { | |
2947 | slave->new_link = BOND_LINK_DOWN; | |
2948 | commit++; | |
2949 | } | |
1da177e4 LT |
2950 | } |
2951 | ||
b2220cad JV |
2952 | read_lock(&bond->curr_slave_lock); |
2953 | ||
2954 | /* | |
2955 | * Trigger a commit if the primary option setting has changed. | |
1da177e4 | 2956 | */ |
b2220cad JV |
2957 | if (bond->primary_slave && |
2958 | (bond->primary_slave != bond->curr_active_slave) && | |
2959 | (bond->primary_slave->link == BOND_LINK_UP)) | |
2960 | commit++; | |
1da177e4 | 2961 | |
b2220cad | 2962 | read_unlock(&bond->curr_slave_lock); |
1da177e4 | 2963 | |
b2220cad JV |
2964 | return commit; |
2965 | } | |
1da177e4 | 2966 | |
b2220cad JV |
2967 | /* |
2968 | * Called to commit link state changes noted by inspection step of | |
2969 | * active-backup mode ARP monitor. | |
2970 | * | |
2971 | * Called with RTNL and bond->lock for read. | |
2972 | */ | |
2973 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2974 | { | |
2975 | struct slave *slave; | |
2976 | int i; | |
1da177e4 | 2977 | |
b2220cad JV |
2978 | bond_for_each_slave(bond, slave, i) { |
2979 | switch (slave->new_link) { | |
2980 | case BOND_LINK_NOCHANGE: | |
2981 | continue; | |
ff59c456 | 2982 | |
b2220cad JV |
2983 | case BOND_LINK_UP: |
2984 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 | 2985 | |
b2220cad JV |
2986 | if (!bond->curr_active_slave && |
2987 | time_before_eq(jiffies, slave->dev->trans_start + | |
2988 | delta_in_ticks)) { | |
2989 | slave->link = BOND_LINK_UP; | |
2990 | bond_change_active_slave(bond, slave); | |
2991 | bond->current_arp_slave = NULL; | |
2992 | ||
2993 | printk(KERN_INFO DRV_NAME | |
2994 | ": %s: %s is up and now the " | |
2995 | "active interface\n", | |
2996 | bond->dev->name, slave->dev->name); | |
2997 | ||
2998 | } else if (bond->curr_active_slave != slave) { | |
2999 | /* this slave has just come up but we | |
3000 | * already have a current slave; this can | |
3001 | * also happen if bond_enslave adds a new | |
3002 | * slave that is up while we are searching | |
3003 | * for a new slave | |
1da177e4 | 3004 | */ |
b2220cad JV |
3005 | slave->link = BOND_LINK_UP; |
3006 | bond_set_slave_inactive_flags(slave); | |
3007 | bond->current_arp_slave = NULL; | |
3008 | ||
3009 | printk(KERN_INFO DRV_NAME | |
3010 | ": %s: backup interface %s is now up\n", | |
3011 | bond->dev->name, slave->dev->name); | |
3012 | } | |
1da177e4 | 3013 | |
b2220cad | 3014 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 | 3015 | |
b2220cad | 3016 | break; |
1da177e4 | 3017 | |
b2220cad JV |
3018 | case BOND_LINK_DOWN: |
3019 | if (slave->link_failure_count < UINT_MAX) | |
3020 | slave->link_failure_count++; | |
3021 | ||
3022 | slave->link = BOND_LINK_DOWN; | |
3023 | ||
3024 | if (slave == bond->curr_active_slave) { | |
3025 | printk(KERN_INFO DRV_NAME | |
3026 | ": %s: link status down for active " | |
3027 | "interface %s, disabling it\n", | |
3028 | bond->dev->name, slave->dev->name); | |
1da177e4 LT |
3029 | |
3030 | bond_set_slave_inactive_flags(slave); | |
3031 | ||
b2220cad JV |
3032 | write_lock_bh(&bond->curr_slave_lock); |
3033 | ||
3034 | bond_select_active_slave(bond); | |
3035 | if (bond->curr_active_slave) | |
3036 | bond->curr_active_slave->jiffies = | |
3037 | jiffies; | |
3038 | ||
3039 | write_unlock_bh(&bond->curr_slave_lock); | |
3040 | ||
3041 | bond->current_arp_slave = NULL; | |
3042 | ||
3043 | } else if (slave->state == BOND_STATE_BACKUP) { | |
1da177e4 LT |
3044 | printk(KERN_INFO DRV_NAME |
3045 | ": %s: backup interface %s is now down\n", | |
b2220cad JV |
3046 | bond->dev->name, slave->dev->name); |
3047 | ||
3048 | bond_set_slave_inactive_flags(slave); | |
1da177e4 | 3049 | } |
b2220cad JV |
3050 | break; |
3051 | ||
3052 | default: | |
3053 | printk(KERN_ERR DRV_NAME | |
3054 | ": %s: impossible: new_link %d on slave %s\n", | |
3055 | bond->dev->name, slave->new_link, | |
3056 | slave->dev->name); | |
1da177e4 LT |
3057 | } |
3058 | } | |
3059 | ||
b2220cad JV |
3060 | /* |
3061 | * No race with changes to primary via sysfs, as we hold rtnl. | |
3062 | */ | |
3063 | if (bond->primary_slave && | |
3064 | (bond->primary_slave != bond->curr_active_slave) && | |
3065 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3066 | write_lock_bh(&bond->curr_slave_lock); | |
3067 | bond_change_active_slave(bond, bond->primary_slave); | |
3068 | write_unlock_bh(&bond->curr_slave_lock); | |
3069 | } | |
1da177e4 | 3070 | |
b2220cad JV |
3071 | bond_set_carrier(bond); |
3072 | } | |
1da177e4 | 3073 | |
b2220cad JV |
3074 | /* |
3075 | * Send ARP probes for active-backup mode ARP monitor. | |
3076 | * | |
3077 | * Called with bond->lock held for read. | |
3078 | */ | |
3079 | static void bond_ab_arp_probe(struct bonding *bond) | |
3080 | { | |
3081 | struct slave *slave; | |
3082 | int i; | |
1da177e4 | 3083 | |
b2220cad | 3084 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3085 | |
b2220cad JV |
3086 | if (bond->current_arp_slave && bond->curr_active_slave) |
3087 | printk("PROBE: c_arp %s && cas %s BAD\n", | |
3088 | bond->current_arp_slave->dev->name, | |
3089 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3090 | |
b2220cad JV |
3091 | if (bond->curr_active_slave) { |
3092 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3093 | read_unlock(&bond->curr_slave_lock); | |
3094 | return; | |
3095 | } | |
1da177e4 | 3096 | |
b2220cad | 3097 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3098 | |
b2220cad JV |
3099 | /* if we don't have a curr_active_slave, search for the next available |
3100 | * backup slave from the current_arp_slave and make it the candidate | |
3101 | * for becoming the curr_active_slave | |
3102 | */ | |
1da177e4 | 3103 | |
b2220cad JV |
3104 | if (!bond->current_arp_slave) { |
3105 | bond->current_arp_slave = bond->first_slave; | |
3106 | if (!bond->current_arp_slave) | |
3107 | return; | |
3108 | } | |
1da177e4 | 3109 | |
b2220cad | 3110 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3111 | |
b2220cad JV |
3112 | /* search for next candidate */ |
3113 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3114 | if (IS_UP(slave->dev)) { | |
3115 | slave->link = BOND_LINK_BACK; | |
3116 | bond_set_slave_active_flags(slave); | |
3117 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3118 | slave->jiffies = jiffies; |
b2220cad JV |
3119 | bond->current_arp_slave = slave; |
3120 | break; | |
1da177e4 LT |
3121 | } |
3122 | ||
b2220cad JV |
3123 | /* if the link state is up at this point, we |
3124 | * mark it down - this can happen if we have | |
3125 | * simultaneous link failures and | |
3126 | * reselect_active_interface doesn't make this | |
3127 | * one the current slave so it is still marked | |
3128 | * up when it is actually down | |
1da177e4 | 3129 | */ |
b2220cad JV |
3130 | if (slave->link == BOND_LINK_UP) { |
3131 | slave->link = BOND_LINK_DOWN; | |
3132 | if (slave->link_failure_count < UINT_MAX) | |
3133 | slave->link_failure_count++; | |
1da177e4 | 3134 | |
b2220cad JV |
3135 | bond_set_slave_inactive_flags(slave); |
3136 | ||
3137 | printk(KERN_INFO DRV_NAME | |
3138 | ": %s: backup interface %s is now down.\n", | |
3139 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3140 | } |
b2220cad JV |
3141 | } |
3142 | } | |
1da177e4 | 3143 | |
b2220cad JV |
3144 | void bond_activebackup_arp_mon(struct work_struct *work) |
3145 | { | |
3146 | struct bonding *bond = container_of(work, struct bonding, | |
3147 | arp_work.work); | |
3148 | int delta_in_ticks; | |
1da177e4 | 3149 | |
b2220cad | 3150 | read_lock(&bond->lock); |
1da177e4 | 3151 | |
b2220cad JV |
3152 | if (bond->kill_timers) |
3153 | goto out; | |
1da177e4 | 3154 | |
b2220cad | 3155 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3156 | |
b2220cad JV |
3157 | if (bond->slave_cnt == 0) |
3158 | goto re_arm; | |
3159 | ||
b59f9f74 JV |
3160 | if (bond->send_grat_arp) { |
3161 | read_lock(&bond->curr_slave_lock); | |
3162 | bond_send_gratuitous_arp(bond); | |
3163 | read_unlock(&bond->curr_slave_lock); | |
3164 | } | |
3165 | ||
305d552a BH |
3166 | if (bond->send_unsol_na) { |
3167 | read_lock(&bond->curr_slave_lock); | |
3168 | bond_send_unsolicited_na(bond); | |
3169 | read_unlock(&bond->curr_slave_lock); | |
3170 | } | |
3171 | ||
b2220cad JV |
3172 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3173 | read_unlock(&bond->lock); | |
3174 | rtnl_lock(); | |
3175 | read_lock(&bond->lock); | |
3176 | ||
3177 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3178 | ||
3179 | read_unlock(&bond->lock); | |
3180 | rtnl_unlock(); | |
3181 | read_lock(&bond->lock); | |
1da177e4 LT |
3182 | } |
3183 | ||
b2220cad JV |
3184 | bond_ab_arp_probe(bond); |
3185 | ||
1da177e4 LT |
3186 | re_arm: |
3187 | if (bond->params.arp_interval) { | |
1b76b316 | 3188 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3189 | } |
3190 | out: | |
3191 | read_unlock(&bond->lock); | |
3192 | } | |
3193 | ||
3194 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3195 | ||
3196 | #ifdef CONFIG_PROC_FS | |
3197 | ||
1da177e4 LT |
3198 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
3199 | { | |
3200 | struct bonding *bond = seq->private; | |
3201 | loff_t off = 0; | |
3202 | struct slave *slave; | |
3203 | int i; | |
3204 | ||
3205 | /* make sure the bond won't be taken away */ | |
3206 | read_lock(&dev_base_lock); | |
6603a6f2 | 3207 | read_lock(&bond->lock); |
1da177e4 LT |
3208 | |
3209 | if (*pos == 0) { | |
3210 | return SEQ_START_TOKEN; | |
3211 | } | |
3212 | ||
3213 | bond_for_each_slave(bond, slave, i) { | |
3214 | if (++off == *pos) { | |
3215 | return slave; | |
3216 | } | |
3217 | } | |
3218 | ||
3219 | return NULL; | |
3220 | } | |
3221 | ||
3222 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3223 | { | |
3224 | struct bonding *bond = seq->private; | |
3225 | struct slave *slave = v; | |
3226 | ||
3227 | ++*pos; | |
3228 | if (v == SEQ_START_TOKEN) { | |
3229 | return bond->first_slave; | |
3230 | } | |
3231 | ||
3232 | slave = slave->next; | |
3233 | ||
3234 | return (slave == bond->first_slave) ? NULL : slave; | |
3235 | } | |
3236 | ||
3237 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
3238 | { | |
3239 | struct bonding *bond = seq->private; | |
3240 | ||
6603a6f2 | 3241 | read_unlock(&bond->lock); |
1da177e4 LT |
3242 | read_unlock(&dev_base_lock); |
3243 | } | |
3244 | ||
3245 | static void bond_info_show_master(struct seq_file *seq) | |
3246 | { | |
3247 | struct bonding *bond = seq->private; | |
3248 | struct slave *curr; | |
4756b02f | 3249 | int i; |
1da177e4 LT |
3250 | |
3251 | read_lock(&bond->curr_slave_lock); | |
3252 | curr = bond->curr_active_slave; | |
3253 | read_unlock(&bond->curr_slave_lock); | |
3254 | ||
dd957c57 | 3255 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3256 | bond_mode_name(bond->params.mode)); |
3257 | ||
dd957c57 JV |
3258 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3259 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3260 | seq_printf(seq, " (fail_over_mac %s)", |
3261 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3262 | |
3263 | seq_printf(seq, "\n"); | |
3264 | ||
c61b75ad MW |
3265 | if (bond->params.mode == BOND_MODE_XOR || |
3266 | bond->params.mode == BOND_MODE_8023AD) { | |
3267 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3268 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3269 | bond->params.xmit_policy); | |
3270 | } | |
3271 | ||
1da177e4 LT |
3272 | if (USES_PRIMARY(bond->params.mode)) { |
3273 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
3274 | (bond->primary_slave) ? |
3275 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
3276 | |
3277 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3278 | (curr) ? curr->dev->name : "None"); | |
3279 | } | |
3280 | ||
ff59c456 JV |
3281 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3282 | "up" : "down"); | |
1da177e4 LT |
3283 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3284 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3285 | bond->params.updelay * bond->params.miimon); | |
3286 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3287 | bond->params.downdelay * bond->params.miimon); | |
3288 | ||
4756b02f MW |
3289 | |
3290 | /* ARP information */ | |
3291 | if(bond->params.arp_interval > 0) { | |
3292 | int printed=0; | |
3293 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", | |
3294 | bond->params.arp_interval); | |
3295 | ||
3296 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3297 | ||
3298 | for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) { | |
3299 | if (!bond->params.arp_targets[i]) | |
3300 | continue; | |
3301 | if (printed) | |
3302 | seq_printf(seq, ","); | |
8cf14e38 | 3303 | seq_printf(seq, " %pI4", &bond->params.arp_targets[i]); |
4756b02f MW |
3304 | printed = 1; |
3305 | } | |
3306 | seq_printf(seq, "\n"); | |
3307 | } | |
3308 | ||
1da177e4 LT |
3309 | if (bond->params.mode == BOND_MODE_8023AD) { |
3310 | struct ad_info ad_info; | |
3311 | ||
3312 | seq_puts(seq, "\n802.3ad info\n"); | |
3313 | seq_printf(seq, "LACP rate: %s\n", | |
3314 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
fd989c83 JV |
3315 | seq_printf(seq, "Aggregator selection policy (ad_select): %s\n", |
3316 | ad_select_tbl[bond->params.ad_select].modename); | |
1da177e4 LT |
3317 | |
3318 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3319 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3320 | bond->dev->name); | |
3321 | } else { | |
3322 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3323 | ||
3324 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3325 | ad_info.aggregator_id); | |
3326 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3327 | ad_info.ports); | |
3328 | seq_printf(seq, "\tActor Key: %d\n", | |
3329 | ad_info.actor_key); | |
3330 | seq_printf(seq, "\tPartner Key: %d\n", | |
3331 | ad_info.partner_key); | |
e174961c JB |
3332 | seq_printf(seq, "\tPartner Mac Address: %pM\n", |
3333 | ad_info.partner_system); | |
1da177e4 LT |
3334 | } |
3335 | } | |
3336 | } | |
3337 | ||
3338 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3339 | { | |
3340 | struct bonding *bond = seq->private; | |
3341 | ||
3342 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3343 | seq_printf(seq, "MII Status: %s\n", | |
3344 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3345 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3346 | slave->link_failure_count); |
3347 | ||
e174961c | 3348 | seq_printf(seq, "Permanent HW addr: %pM\n", slave->perm_hwaddr); |
1da177e4 LT |
3349 | |
3350 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3351 | const struct aggregator *agg | |
3352 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3353 | ||
3354 | if (agg) { | |
3355 | seq_printf(seq, "Aggregator ID: %d\n", | |
3356 | agg->aggregator_identifier); | |
3357 | } else { | |
3358 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3359 | } | |
3360 | } | |
3361 | } | |
3362 | ||
3363 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3364 | { | |
3365 | if (v == SEQ_START_TOKEN) { | |
3366 | seq_printf(seq, "%s\n", version); | |
3367 | bond_info_show_master(seq); | |
3368 | } else { | |
3369 | bond_info_show_slave(seq, v); | |
3370 | } | |
3371 | ||
3372 | return 0; | |
3373 | } | |
3374 | ||
3375 | static struct seq_operations bond_info_seq_ops = { | |
3376 | .start = bond_info_seq_start, | |
3377 | .next = bond_info_seq_next, | |
3378 | .stop = bond_info_seq_stop, | |
3379 | .show = bond_info_seq_show, | |
3380 | }; | |
3381 | ||
3382 | static int bond_info_open(struct inode *inode, struct file *file) | |
3383 | { | |
3384 | struct seq_file *seq; | |
3385 | struct proc_dir_entry *proc; | |
3386 | int res; | |
3387 | ||
3388 | res = seq_open(file, &bond_info_seq_ops); | |
3389 | if (!res) { | |
3390 | /* recover the pointer buried in proc_dir_entry data */ | |
3391 | seq = file->private_data; | |
3392 | proc = PDE(inode); | |
3393 | seq->private = proc->data; | |
3394 | } | |
3395 | ||
3396 | return res; | |
3397 | } | |
3398 | ||
d54b1fdb | 3399 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3400 | .owner = THIS_MODULE, |
3401 | .open = bond_info_open, | |
3402 | .read = seq_read, | |
3403 | .llseek = seq_lseek, | |
3404 | .release = seq_release, | |
3405 | }; | |
3406 | ||
3407 | static int bond_create_proc_entry(struct bonding *bond) | |
3408 | { | |
3409 | struct net_device *bond_dev = bond->dev; | |
3410 | ||
3411 | if (bond_proc_dir) { | |
a95609cb DL |
3412 | bond->proc_entry = proc_create_data(bond_dev->name, |
3413 | S_IRUGO, bond_proc_dir, | |
3414 | &bond_info_fops, bond); | |
1da177e4 LT |
3415 | if (bond->proc_entry == NULL) { |
3416 | printk(KERN_WARNING DRV_NAME | |
3417 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3418 | DRV_NAME, bond_dev->name); | |
3419 | } else { | |
1da177e4 LT |
3420 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
3421 | } | |
3422 | } | |
3423 | ||
3424 | return 0; | |
3425 | } | |
3426 | ||
3427 | static void bond_remove_proc_entry(struct bonding *bond) | |
3428 | { | |
3429 | if (bond_proc_dir && bond->proc_entry) { | |
3430 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3431 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3432 | bond->proc_entry = NULL; | |
3433 | } | |
3434 | } | |
3435 | ||
3436 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3437 | * Caller must hold rtnl_lock. | |
3438 | */ | |
3439 | static void bond_create_proc_dir(void) | |
3440 | { | |
3441 | int len = strlen(DRV_NAME); | |
3442 | ||
457c4cbc | 3443 | for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir; |
1da177e4 LT |
3444 | bond_proc_dir = bond_proc_dir->next) { |
3445 | if ((bond_proc_dir->namelen == len) && | |
3446 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3447 | break; | |
3448 | } | |
3449 | } | |
3450 | ||
3451 | if (!bond_proc_dir) { | |
457c4cbc | 3452 | bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net); |
1da177e4 LT |
3453 | if (bond_proc_dir) { |
3454 | bond_proc_dir->owner = THIS_MODULE; | |
3455 | } else { | |
3456 | printk(KERN_WARNING DRV_NAME | |
3457 | ": Warning: cannot create /proc/net/%s\n", | |
3458 | DRV_NAME); | |
3459 | } | |
3460 | } | |
3461 | } | |
3462 | ||
3463 | /* Destroy the bonding directory under /proc/net, if empty. | |
3464 | * Caller must hold rtnl_lock. | |
3465 | */ | |
3466 | static void bond_destroy_proc_dir(void) | |
3467 | { | |
3468 | struct proc_dir_entry *de; | |
3469 | ||
3470 | if (!bond_proc_dir) { | |
3471 | return; | |
3472 | } | |
3473 | ||
3474 | /* verify that the /proc dir is empty */ | |
3475 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3476 | /* ignore . and .. */ | |
3477 | if (*(de->name) != '.') { | |
3478 | break; | |
3479 | } | |
3480 | } | |
3481 | ||
3482 | if (de) { | |
3483 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3484 | bond_proc_dir->owner = NULL; | |
3485 | } | |
3486 | } else { | |
457c4cbc | 3487 | remove_proc_entry(DRV_NAME, init_net.proc_net); |
1da177e4 LT |
3488 | bond_proc_dir = NULL; |
3489 | } | |
3490 | } | |
3491 | #endif /* CONFIG_PROC_FS */ | |
3492 | ||
3493 | /*-------------------------- netdev event handling --------------------------*/ | |
3494 | ||
3495 | /* | |
3496 | * Change device name | |
3497 | */ | |
3498 | static int bond_event_changename(struct bonding *bond) | |
3499 | { | |
3500 | #ifdef CONFIG_PROC_FS | |
3501 | bond_remove_proc_entry(bond); | |
3502 | bond_create_proc_entry(bond); | |
3503 | #endif | |
b76cdba9 MW |
3504 | down_write(&(bonding_rwsem)); |
3505 | bond_destroy_sysfs_entry(bond); | |
3506 | bond_create_sysfs_entry(bond); | |
3507 | up_write(&(bonding_rwsem)); | |
1da177e4 LT |
3508 | return NOTIFY_DONE; |
3509 | } | |
3510 | ||
3511 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3512 | { | |
454d7c9b | 3513 | struct bonding *event_bond = netdev_priv(bond_dev); |
1da177e4 LT |
3514 | |
3515 | switch (event) { | |
3516 | case NETDEV_CHANGENAME: | |
3517 | return bond_event_changename(event_bond); | |
3518 | case NETDEV_UNREGISTER: | |
3b96c858 | 3519 | bond_release_all(event_bond->dev); |
1da177e4 LT |
3520 | break; |
3521 | default: | |
3522 | break; | |
3523 | } | |
3524 | ||
3525 | return NOTIFY_DONE; | |
3526 | } | |
3527 | ||
3528 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3529 | { | |
3530 | struct net_device *bond_dev = slave_dev->master; | |
454d7c9b | 3531 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3532 | |
3533 | switch (event) { | |
3534 | case NETDEV_UNREGISTER: | |
3535 | if (bond_dev) { | |
1284cd3a JV |
3536 | if (bond->setup_by_slave) |
3537 | bond_release_and_destroy(bond_dev, slave_dev); | |
3538 | else | |
3539 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3540 | } |
3541 | break; | |
3542 | case NETDEV_CHANGE: | |
3543 | /* | |
3544 | * TODO: is this what we get if somebody | |
3545 | * sets up a hierarchical bond, then rmmod's | |
3546 | * one of the slave bonding devices? | |
3547 | */ | |
3548 | break; | |
3549 | case NETDEV_DOWN: | |
3550 | /* | |
3551 | * ... Or is it this? | |
3552 | */ | |
3553 | break; | |
3554 | case NETDEV_CHANGEMTU: | |
3555 | /* | |
3556 | * TODO: Should slaves be allowed to | |
3557 | * independently alter their MTU? For | |
3558 | * an active-backup bond, slaves need | |
3559 | * not be the same type of device, so | |
3560 | * MTUs may vary. For other modes, | |
3561 | * slaves arguably should have the | |
3562 | * same MTUs. To do this, we'd need to | |
3563 | * take over the slave's change_mtu | |
3564 | * function for the duration of their | |
3565 | * servitude. | |
3566 | */ | |
3567 | break; | |
3568 | case NETDEV_CHANGENAME: | |
3569 | /* | |
3570 | * TODO: handle changing the primary's name | |
3571 | */ | |
3572 | break; | |
8531c5ff AK |
3573 | case NETDEV_FEAT_CHANGE: |
3574 | bond_compute_features(bond); | |
3575 | break; | |
1da177e4 LT |
3576 | default: |
3577 | break; | |
3578 | } | |
3579 | ||
3580 | return NOTIFY_DONE; | |
3581 | } | |
3582 | ||
3583 | /* | |
3584 | * bond_netdev_event: handle netdev notifier chain events. | |
3585 | * | |
3586 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3587 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3588 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3589 | * dev_probe_lock). | |
3590 | */ | |
3591 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3592 | { | |
3593 | struct net_device *event_dev = (struct net_device *)ptr; | |
3594 | ||
c346dca1 | 3595 | if (dev_net(event_dev) != &init_net) |
e9dc8653 EB |
3596 | return NOTIFY_DONE; |
3597 | ||
1da177e4 LT |
3598 | dprintk("event_dev: %s, event: %lx\n", |
3599 | (event_dev ? event_dev->name : "None"), | |
3600 | event); | |
3601 | ||
0b680e75 JV |
3602 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3603 | return NOTIFY_DONE; | |
3604 | ||
1da177e4 LT |
3605 | if (event_dev->flags & IFF_MASTER) { |
3606 | dprintk("IFF_MASTER\n"); | |
3607 | return bond_master_netdev_event(event, event_dev); | |
3608 | } | |
3609 | ||
3610 | if (event_dev->flags & IFF_SLAVE) { | |
3611 | dprintk("IFF_SLAVE\n"); | |
3612 | return bond_slave_netdev_event(event, event_dev); | |
3613 | } | |
3614 | ||
3615 | return NOTIFY_DONE; | |
3616 | } | |
3617 | ||
c3ade5ca JV |
3618 | /* |
3619 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3620 | * | |
3621 | * We keep track of device IPs primarily to use as source addresses in | |
3622 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3623 | * | |
3624 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3625 | */ | |
3626 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3627 | { | |
3628 | struct in_ifaddr *ifa = ptr; | |
3629 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
0883beca PE |
3630 | struct bonding *bond; |
3631 | struct vlan_entry *vlan; | |
c3ade5ca | 3632 | |
c346dca1 | 3633 | if (dev_net(ifa->ifa_dev->dev) != &init_net) |
6133fb1a DL |
3634 | return NOTIFY_DONE; |
3635 | ||
0883beca | 3636 | list_for_each_entry(bond, &bond_dev_list, bond_list) { |
c3ade5ca JV |
3637 | if (bond->dev == event_dev) { |
3638 | switch (event) { | |
3639 | case NETDEV_UP: | |
3640 | bond->master_ip = ifa->ifa_local; | |
3641 | return NOTIFY_OK; | |
3642 | case NETDEV_DOWN: | |
3643 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3644 | return NOTIFY_OK; | |
3645 | default: | |
3646 | return NOTIFY_DONE; | |
3647 | } | |
3648 | } | |
3649 | ||
0883beca | 3650 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 3651 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3652 | if (vlan_dev == event_dev) { |
3653 | switch (event) { | |
3654 | case NETDEV_UP: | |
3655 | vlan->vlan_ip = ifa->ifa_local; | |
3656 | return NOTIFY_OK; | |
3657 | case NETDEV_DOWN: | |
3658 | vlan->vlan_ip = | |
3659 | bond_glean_dev_ip(vlan_dev); | |
3660 | return NOTIFY_OK; | |
3661 | default: | |
3662 | return NOTIFY_DONE; | |
3663 | } | |
3664 | } | |
3665 | } | |
3666 | } | |
3667 | return NOTIFY_DONE; | |
3668 | } | |
3669 | ||
1da177e4 LT |
3670 | static struct notifier_block bond_netdev_notifier = { |
3671 | .notifier_call = bond_netdev_event, | |
3672 | }; | |
3673 | ||
c3ade5ca JV |
3674 | static struct notifier_block bond_inetaddr_notifier = { |
3675 | .notifier_call = bond_inetaddr_event, | |
3676 | }; | |
3677 | ||
1da177e4 LT |
3678 | /*-------------------------- Packet type handling ---------------------------*/ |
3679 | ||
3680 | /* register to receive lacpdus on a bond */ | |
3681 | static void bond_register_lacpdu(struct bonding *bond) | |
3682 | { | |
3683 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3684 | ||
3685 | /* initialize packet type */ | |
3686 | pk_type->type = PKT_TYPE_LACPDU; | |
3687 | pk_type->dev = bond->dev; | |
3688 | pk_type->func = bond_3ad_lacpdu_recv; | |
3689 | ||
3690 | dev_add_pack(pk_type); | |
3691 | } | |
3692 | ||
3693 | /* unregister to receive lacpdus on a bond */ | |
3694 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3695 | { | |
3696 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3697 | } | |
3698 | ||
f5b2b966 JV |
3699 | void bond_register_arp(struct bonding *bond) |
3700 | { | |
3701 | struct packet_type *pt = &bond->arp_mon_pt; | |
3702 | ||
c4f283b1 JV |
3703 | if (pt->type) |
3704 | return; | |
3705 | ||
f5b2b966 | 3706 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3707 | pt->dev = bond->dev; |
f5b2b966 JV |
3708 | pt->func = bond_arp_rcv; |
3709 | dev_add_pack(pt); | |
3710 | } | |
3711 | ||
3712 | void bond_unregister_arp(struct bonding *bond) | |
3713 | { | |
c4f283b1 JV |
3714 | struct packet_type *pt = &bond->arp_mon_pt; |
3715 | ||
3716 | dev_remove_pack(pt); | |
3717 | pt->type = 0; | |
f5b2b966 JV |
3718 | } |
3719 | ||
169a3e66 JV |
3720 | /*---------------------------- Hashing Policies -----------------------------*/ |
3721 | ||
6f6652be JV |
3722 | /* |
3723 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3724 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3725 | */ | |
3726 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, | |
3727 | struct net_device *bond_dev, int count) | |
3728 | { | |
3729 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3730 | struct iphdr *iph = ip_hdr(skb); | |
3731 | ||
f14c4e4e | 3732 | if (skb->protocol == htons(ETH_P_IP)) { |
6f6652be JV |
3733 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ |
3734 | (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count; | |
3735 | } | |
3736 | ||
3737 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3738 | } | |
3739 | ||
169a3e66 | 3740 | /* |
59c51591 | 3741 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3742 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3743 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3744 | */ | |
3745 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3746 | struct net_device *bond_dev, int count) | |
3747 | { | |
3748 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3749 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3750 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3751 | int layer4_xor = 0; |
3752 | ||
f14c4e4e BH |
3753 | if (skb->protocol == htons(ETH_P_IP)) { |
3754 | if (!(iph->frag_off & htons(IP_MF|IP_OFFSET)) && | |
169a3e66 JV |
3755 | (iph->protocol == IPPROTO_TCP || |
3756 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3757 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3758 | } |
3759 | return (layer4_xor ^ | |
3760 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3761 | ||
3762 | } | |
3763 | ||
3764 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3765 | } | |
3766 | ||
3767 | /* | |
3768 | * Hash for the output device based upon layer 2 data | |
3769 | */ | |
3770 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3771 | struct net_device *bond_dev, int count) | |
3772 | { | |
3773 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3774 | ||
3775 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3776 | } | |
3777 | ||
1da177e4 LT |
3778 | /*-------------------------- Device entry points ----------------------------*/ |
3779 | ||
3780 | static int bond_open(struct net_device *bond_dev) | |
3781 | { | |
454d7c9b | 3782 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3783 | |
3784 | bond->kill_timers = 0; | |
3785 | ||
58402054 | 3786 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3787 | /* bond_alb_initialize must be called before the timer |
3788 | * is started. | |
3789 | */ | |
3790 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3791 | /* something went wrong - fail the open operation */ | |
3792 | return -1; | |
3793 | } | |
3794 | ||
1b76b316 JV |
3795 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3796 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3797 | } |
3798 | ||
3799 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3800 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3801 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3802 | } |
3803 | ||
3804 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3805 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3806 | INIT_DELAYED_WORK(&bond->arp_work, | |
3807 | bond_activebackup_arp_mon); | |
3808 | else | |
3809 | INIT_DELAYED_WORK(&bond->arp_work, | |
3810 | bond_loadbalance_arp_mon); | |
3811 | ||
3812 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3813 | if (bond->params.arp_validate) |
3814 | bond_register_arp(bond); | |
1da177e4 LT |
3815 | } |
3816 | ||
3817 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3818 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3819 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3820 | /* register to receive LACPDUs */ |
3821 | bond_register_lacpdu(bond); | |
fd989c83 | 3822 | bond_3ad_initiate_agg_selection(bond, 1); |
1da177e4 LT |
3823 | } |
3824 | ||
3825 | return 0; | |
3826 | } | |
3827 | ||
3828 | static int bond_close(struct net_device *bond_dev) | |
3829 | { | |
454d7c9b | 3830 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
3831 | |
3832 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3833 | /* Unregister the receive of LACPDUs */ | |
3834 | bond_unregister_lacpdu(bond); | |
3835 | } | |
3836 | ||
f5b2b966 JV |
3837 | if (bond->params.arp_validate) |
3838 | bond_unregister_arp(bond); | |
3839 | ||
1da177e4 LT |
3840 | write_lock_bh(&bond->lock); |
3841 | ||
b59f9f74 | 3842 | bond->send_grat_arp = 0; |
305d552a | 3843 | bond->send_unsol_na = 0; |
1da177e4 LT |
3844 | |
3845 | /* signal timers not to re-arm */ | |
3846 | bond->kill_timers = 1; | |
3847 | ||
3848 | write_unlock_bh(&bond->lock); | |
3849 | ||
1da177e4 | 3850 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3851 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3852 | } |
3853 | ||
3854 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3855 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3856 | } |
3857 | ||
3858 | switch (bond->params.mode) { | |
3859 | case BOND_MODE_8023AD: | |
1b76b316 | 3860 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3861 | break; |
3862 | case BOND_MODE_TLB: | |
3863 | case BOND_MODE_ALB: | |
1b76b316 | 3864 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3865 | break; |
3866 | default: | |
3867 | break; | |
3868 | } | |
3869 | ||
1da177e4 | 3870 | |
58402054 | 3871 | if (bond_is_lb(bond)) { |
1da177e4 LT |
3872 | /* Must be called only after all |
3873 | * slaves have been released | |
3874 | */ | |
3875 | bond_alb_deinitialize(bond); | |
3876 | } | |
3877 | ||
3878 | return 0; | |
3879 | } | |
3880 | ||
3881 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3882 | { | |
454d7c9b | 3883 | struct bonding *bond = netdev_priv(bond_dev); |
eeda3fd6 | 3884 | struct net_device_stats *stats = &bond->stats; |
2439f9eb | 3885 | struct net_device_stats local_stats; |
1da177e4 LT |
3886 | struct slave *slave; |
3887 | int i; | |
3888 | ||
2439f9eb | 3889 | memset(&local_stats, 0, sizeof(struct net_device_stats)); |
1da177e4 LT |
3890 | |
3891 | read_lock_bh(&bond->lock); | |
3892 | ||
3893 | bond_for_each_slave(bond, slave, i) { | |
eeda3fd6 SH |
3894 | const struct net_device_stats *sstats = dev_get_stats(slave->dev); |
3895 | ||
2439f9eb AG |
3896 | local_stats.rx_packets += sstats->rx_packets; |
3897 | local_stats.rx_bytes += sstats->rx_bytes; | |
3898 | local_stats.rx_errors += sstats->rx_errors; | |
3899 | local_stats.rx_dropped += sstats->rx_dropped; | |
3900 | ||
3901 | local_stats.tx_packets += sstats->tx_packets; | |
3902 | local_stats.tx_bytes += sstats->tx_bytes; | |
3903 | local_stats.tx_errors += sstats->tx_errors; | |
3904 | local_stats.tx_dropped += sstats->tx_dropped; | |
3905 | ||
3906 | local_stats.multicast += sstats->multicast; | |
3907 | local_stats.collisions += sstats->collisions; | |
3908 | ||
3909 | local_stats.rx_length_errors += sstats->rx_length_errors; | |
3910 | local_stats.rx_over_errors += sstats->rx_over_errors; | |
3911 | local_stats.rx_crc_errors += sstats->rx_crc_errors; | |
3912 | local_stats.rx_frame_errors += sstats->rx_frame_errors; | |
3913 | local_stats.rx_fifo_errors += sstats->rx_fifo_errors; | |
3914 | local_stats.rx_missed_errors += sstats->rx_missed_errors; | |
3915 | ||
3916 | local_stats.tx_aborted_errors += sstats->tx_aborted_errors; | |
3917 | local_stats.tx_carrier_errors += sstats->tx_carrier_errors; | |
3918 | local_stats.tx_fifo_errors += sstats->tx_fifo_errors; | |
3919 | local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3920 | local_stats.tx_window_errors += sstats->tx_window_errors; | |
3921 | } | |
3922 | ||
3923 | memcpy(stats, &local_stats, sizeof(struct net_device_stats)); | |
1da177e4 LT |
3924 | |
3925 | read_unlock_bh(&bond->lock); | |
3926 | ||
3927 | return stats; | |
3928 | } | |
3929 | ||
3930 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3931 | { | |
3932 | struct net_device *slave_dev = NULL; | |
3933 | struct ifbond k_binfo; | |
3934 | struct ifbond __user *u_binfo = NULL; | |
3935 | struct ifslave k_sinfo; | |
3936 | struct ifslave __user *u_sinfo = NULL; | |
3937 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3938 | int res = 0; |
3939 | ||
3940 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3941 | bond_dev->name, cmd); | |
3942 | ||
3943 | switch (cmd) { | |
1da177e4 LT |
3944 | case SIOCGMIIPHY: |
3945 | mii = if_mii(ifr); | |
3946 | if (!mii) { | |
3947 | return -EINVAL; | |
3948 | } | |
3949 | mii->phy_id = 0; | |
3950 | /* Fall Through */ | |
3951 | case SIOCGMIIREG: | |
3952 | /* | |
3953 | * We do this again just in case we were called by SIOCGMIIREG | |
3954 | * instead of SIOCGMIIPHY. | |
3955 | */ | |
3956 | mii = if_mii(ifr); | |
3957 | if (!mii) { | |
3958 | return -EINVAL; | |
3959 | } | |
3960 | ||
3961 | if (mii->reg_num == 1) { | |
454d7c9b | 3962 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 3963 | mii->val_out = 0; |
6603a6f2 | 3964 | read_lock(&bond->lock); |
1da177e4 | 3965 | read_lock(&bond->curr_slave_lock); |
4e140079 | 3966 | if (netif_carrier_ok(bond->dev)) { |
1da177e4 LT |
3967 | mii->val_out = BMSR_LSTATUS; |
3968 | } | |
3969 | read_unlock(&bond->curr_slave_lock); | |
6603a6f2 | 3970 | read_unlock(&bond->lock); |
1da177e4 LT |
3971 | } |
3972 | ||
3973 | return 0; | |
3974 | case BOND_INFO_QUERY_OLD: | |
3975 | case SIOCBONDINFOQUERY: | |
3976 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3977 | ||
3978 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3979 | return -EFAULT; | |
3980 | } | |
3981 | ||
3982 | res = bond_info_query(bond_dev, &k_binfo); | |
3983 | if (res == 0) { | |
3984 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3985 | return -EFAULT; | |
3986 | } | |
3987 | } | |
3988 | ||
3989 | return res; | |
3990 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3991 | case SIOCBONDSLAVEINFOQUERY: | |
3992 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3993 | ||
3994 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3995 | return -EFAULT; | |
3996 | } | |
3997 | ||
3998 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3999 | if (res == 0) { | |
4000 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
4001 | return -EFAULT; | |
4002 | } | |
4003 | } | |
4004 | ||
4005 | return res; | |
4006 | default: | |
4007 | /* Go on */ | |
4008 | break; | |
4009 | } | |
4010 | ||
4011 | if (!capable(CAP_NET_ADMIN)) { | |
4012 | return -EPERM; | |
4013 | } | |
4014 | ||
b76cdba9 | 4015 | down_write(&(bonding_rwsem)); |
881d966b | 4016 | slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave); |
1da177e4 LT |
4017 | |
4018 | dprintk("slave_dev=%p: \n", slave_dev); | |
4019 | ||
4020 | if (!slave_dev) { | |
4021 | res = -ENODEV; | |
4022 | } else { | |
4023 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
4024 | switch (cmd) { | |
4025 | case BOND_ENSLAVE_OLD: | |
4026 | case SIOCBONDENSLAVE: | |
4027 | res = bond_enslave(bond_dev, slave_dev); | |
4028 | break; | |
4029 | case BOND_RELEASE_OLD: | |
4030 | case SIOCBONDRELEASE: | |
4031 | res = bond_release(bond_dev, slave_dev); | |
4032 | break; | |
4033 | case BOND_SETHWADDR_OLD: | |
4034 | case SIOCBONDSETHWADDR: | |
4035 | res = bond_sethwaddr(bond_dev, slave_dev); | |
4036 | break; | |
4037 | case BOND_CHANGE_ACTIVE_OLD: | |
4038 | case SIOCBONDCHANGEACTIVE: | |
4039 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
4040 | break; | |
4041 | default: | |
4042 | res = -EOPNOTSUPP; | |
4043 | } | |
4044 | ||
4045 | dev_put(slave_dev); | |
4046 | } | |
4047 | ||
b76cdba9 | 4048 | up_write(&(bonding_rwsem)); |
1da177e4 LT |
4049 | return res; |
4050 | } | |
4051 | ||
4052 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
4053 | { | |
454d7c9b | 4054 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4055 | struct dev_mc_list *dmi; |
4056 | ||
1da177e4 LT |
4057 | /* |
4058 | * Do promisc before checking multicast_mode | |
4059 | */ | |
4060 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
7e1a1ac1 WC |
4061 | /* |
4062 | * FIXME: Need to handle the error when one of the multi-slaves | |
4063 | * encounters error. | |
4064 | */ | |
1da177e4 LT |
4065 | bond_set_promiscuity(bond, 1); |
4066 | } | |
4067 | ||
4068 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
4069 | bond_set_promiscuity(bond, -1); | |
4070 | } | |
4071 | ||
4072 | /* set allmulti flag to slaves */ | |
4073 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
7e1a1ac1 WC |
4074 | /* |
4075 | * FIXME: Need to handle the error when one of the multi-slaves | |
4076 | * encounters error. | |
4077 | */ | |
1da177e4 LT |
4078 | bond_set_allmulti(bond, 1); |
4079 | } | |
4080 | ||
4081 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
4082 | bond_set_allmulti(bond, -1); | |
4083 | } | |
4084 | ||
80ee5ad2 JV |
4085 | read_lock(&bond->lock); |
4086 | ||
1da177e4 LT |
4087 | bond->flags = bond_dev->flags; |
4088 | ||
4089 | /* looking for addresses to add to slaves' mc list */ | |
4090 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
4091 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
4092 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4093 | } | |
4094 | } | |
4095 | ||
4096 | /* looking for addresses to delete from slaves' list */ | |
4097 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
4098 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
4099 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4100 | } | |
4101 | } | |
4102 | ||
4103 | /* save master's multicast list */ | |
4104 | bond_mc_list_destroy(bond); | |
4105 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
4106 | ||
80ee5ad2 | 4107 | read_unlock(&bond->lock); |
1da177e4 LT |
4108 | } |
4109 | ||
00829823 SH |
4110 | static int bond_neigh_setup(struct net_device *dev, struct neigh_parms *parms) |
4111 | { | |
4112 | struct bonding *bond = netdev_priv(dev); | |
4113 | struct slave *slave = bond->first_slave; | |
4114 | ||
4115 | if (slave) { | |
4116 | const struct net_device_ops *slave_ops | |
4117 | = slave->dev->netdev_ops; | |
4118 | if (slave_ops->ndo_neigh_setup) | |
4119 | return slave_ops->ndo_neigh_setup(dev, parms); | |
4120 | } | |
4121 | return 0; | |
4122 | } | |
4123 | ||
1da177e4 LT |
4124 | /* |
4125 | * Change the MTU of all of a master's slaves to match the master | |
4126 | */ | |
4127 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4128 | { | |
454d7c9b | 4129 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4130 | struct slave *slave, *stop_at; |
4131 | int res = 0; | |
4132 | int i; | |
4133 | ||
4134 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
4135 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
4136 | ||
4137 | /* Can't hold bond->lock with bh disabled here since | |
4138 | * some base drivers panic. On the other hand we can't | |
4139 | * hold bond->lock without bh disabled because we'll | |
4140 | * deadlock. The only solution is to rely on the fact | |
4141 | * that we're under rtnl_lock here, and the slaves | |
4142 | * list won't change. This doesn't solve the problem | |
4143 | * of setting the slave's MTU while it is | |
4144 | * transmitting, but the assumption is that the base | |
4145 | * driver can handle that. | |
4146 | * | |
4147 | * TODO: figure out a way to safely iterate the slaves | |
4148 | * list, but without holding a lock around the actual | |
4149 | * call to the base driver. | |
4150 | */ | |
4151 | ||
4152 | bond_for_each_slave(bond, slave, i) { | |
4153 | dprintk("s %p s->p %p c_m %p\n", slave, | |
4154 | slave->prev, slave->dev->change_mtu); | |
e944ef79 | 4155 | |
1da177e4 LT |
4156 | res = dev_set_mtu(slave->dev, new_mtu); |
4157 | ||
4158 | if (res) { | |
4159 | /* If we failed to set the slave's mtu to the new value | |
4160 | * we must abort the operation even in ACTIVE_BACKUP | |
4161 | * mode, because if we allow the backup slaves to have | |
4162 | * different mtu values than the active slave we'll | |
4163 | * need to change their mtu when doing a failover. That | |
4164 | * means changing their mtu from timer context, which | |
4165 | * is probably not a good idea. | |
4166 | */ | |
4167 | dprintk("err %d %s\n", res, slave->dev->name); | |
4168 | goto unwind; | |
4169 | } | |
4170 | } | |
4171 | ||
4172 | bond_dev->mtu = new_mtu; | |
4173 | ||
4174 | return 0; | |
4175 | ||
4176 | unwind: | |
4177 | /* unwind from head to the slave that failed */ | |
4178 | stop_at = slave; | |
4179 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4180 | int tmp_res; | |
4181 | ||
4182 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4183 | if (tmp_res) { | |
4184 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4185 | slave->dev->name); | |
4186 | } | |
4187 | } | |
4188 | ||
4189 | return res; | |
4190 | } | |
4191 | ||
4192 | /* | |
4193 | * Change HW address | |
4194 | * | |
4195 | * Note that many devices must be down to change the HW address, and | |
4196 | * downing the master releases all slaves. We can make bonds full of | |
4197 | * bonding devices to test this, however. | |
4198 | */ | |
4199 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4200 | { | |
454d7c9b | 4201 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4202 | struct sockaddr *sa = addr, tmp_sa; |
4203 | struct slave *slave, *stop_at; | |
4204 | int res = 0; | |
4205 | int i; | |
4206 | ||
eb7cc59a SH |
4207 | if (bond->params.mode == BOND_MODE_ALB) |
4208 | return bond_alb_set_mac_address(bond_dev, addr); | |
4209 | ||
4210 | ||
1da177e4 LT |
4211 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); |
4212 | ||
dd957c57 | 4213 | /* |
3915c1e8 JV |
4214 | * If fail_over_mac is set to active, do nothing and return |
4215 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4216 | */ |
3915c1e8 | 4217 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4218 | return 0; |
2ab82852 | 4219 | |
1da177e4 LT |
4220 | if (!is_valid_ether_addr(sa->sa_data)) { |
4221 | return -EADDRNOTAVAIL; | |
4222 | } | |
4223 | ||
4224 | /* Can't hold bond->lock with bh disabled here since | |
4225 | * some base drivers panic. On the other hand we can't | |
4226 | * hold bond->lock without bh disabled because we'll | |
4227 | * deadlock. The only solution is to rely on the fact | |
4228 | * that we're under rtnl_lock here, and the slaves | |
4229 | * list won't change. This doesn't solve the problem | |
4230 | * of setting the slave's hw address while it is | |
4231 | * transmitting, but the assumption is that the base | |
4232 | * driver can handle that. | |
4233 | * | |
4234 | * TODO: figure out a way to safely iterate the slaves | |
4235 | * list, but without holding a lock around the actual | |
4236 | * call to the base driver. | |
4237 | */ | |
4238 | ||
4239 | bond_for_each_slave(bond, slave, i) { | |
eb7cc59a | 4240 | const struct net_device_ops *slave_ops = slave->dev->netdev_ops; |
1da177e4 LT |
4241 | dprintk("slave %p %s\n", slave, slave->dev->name); |
4242 | ||
eb7cc59a | 4243 | if (slave_ops->ndo_set_mac_address == NULL) { |
1da177e4 LT |
4244 | res = -EOPNOTSUPP; |
4245 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
4246 | goto unwind; | |
4247 | } | |
4248 | ||
4249 | res = dev_set_mac_address(slave->dev, addr); | |
4250 | if (res) { | |
4251 | /* TODO: consider downing the slave | |
4252 | * and retry ? | |
4253 | * User should expect communications | |
4254 | * breakage anyway until ARP finish | |
4255 | * updating, so... | |
4256 | */ | |
4257 | dprintk("err %d %s\n", res, slave->dev->name); | |
4258 | goto unwind; | |
4259 | } | |
4260 | } | |
4261 | ||
4262 | /* success */ | |
4263 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4264 | return 0; | |
4265 | ||
4266 | unwind: | |
4267 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4268 | tmp_sa.sa_family = bond_dev->type; | |
4269 | ||
4270 | /* unwind from head to the slave that failed */ | |
4271 | stop_at = slave; | |
4272 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4273 | int tmp_res; | |
4274 | ||
4275 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4276 | if (tmp_res) { | |
4277 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4278 | slave->dev->name); | |
4279 | } | |
4280 | } | |
4281 | ||
4282 | return res; | |
4283 | } | |
4284 | ||
4285 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4286 | { | |
454d7c9b | 4287 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 | 4288 | struct slave *slave, *start_at; |
cf5f9044 | 4289 | int i, slave_no, res = 1; |
1da177e4 LT |
4290 | |
4291 | read_lock(&bond->lock); | |
4292 | ||
4293 | if (!BOND_IS_OK(bond)) { | |
4294 | goto out; | |
4295 | } | |
4296 | ||
cf5f9044 JV |
4297 | /* |
4298 | * Concurrent TX may collide on rr_tx_counter; we accept that | |
4299 | * as being rare enough not to justify using an atomic op here | |
4300 | */ | |
4301 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
1da177e4 | 4302 | |
cf5f9044 JV |
4303 | bond_for_each_slave(bond, slave, i) { |
4304 | slave_no--; | |
4305 | if (slave_no < 0) { | |
4306 | break; | |
4307 | } | |
1da177e4 LT |
4308 | } |
4309 | ||
cf5f9044 | 4310 | start_at = slave; |
1da177e4 LT |
4311 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4312 | if (IS_UP(slave->dev) && | |
4313 | (slave->link == BOND_LINK_UP) && | |
4314 | (slave->state == BOND_STATE_ACTIVE)) { | |
4315 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4316 | break; |
4317 | } | |
4318 | } | |
4319 | ||
1da177e4 LT |
4320 | out: |
4321 | if (res) { | |
4322 | /* no suitable interface, frame not sent */ | |
4323 | dev_kfree_skb(skb); | |
4324 | } | |
4325 | read_unlock(&bond->lock); | |
4326 | return 0; | |
4327 | } | |
4328 | ||
075897ce | 4329 | |
1da177e4 LT |
4330 | /* |
4331 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4332 | * the bond has a usable interface. | |
4333 | */ | |
4334 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4335 | { | |
454d7c9b | 4336 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4337 | int res = 1; |
4338 | ||
1da177e4 LT |
4339 | read_lock(&bond->lock); |
4340 | read_lock(&bond->curr_slave_lock); | |
4341 | ||
4342 | if (!BOND_IS_OK(bond)) { | |
4343 | goto out; | |
4344 | } | |
4345 | ||
075897ce JL |
4346 | if (!bond->curr_active_slave) |
4347 | goto out; | |
4348 | ||
075897ce JL |
4349 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4350 | ||
1da177e4 LT |
4351 | out: |
4352 | if (res) { | |
4353 | /* no suitable interface, frame not sent */ | |
4354 | dev_kfree_skb(skb); | |
4355 | } | |
4356 | read_unlock(&bond->curr_slave_lock); | |
4357 | read_unlock(&bond->lock); | |
4358 | return 0; | |
4359 | } | |
4360 | ||
4361 | /* | |
169a3e66 JV |
4362 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4363 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4364 | * find the next active slave. | |
1da177e4 LT |
4365 | */ |
4366 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4367 | { | |
454d7c9b | 4368 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4369 | struct slave *slave, *start_at; |
4370 | int slave_no; | |
4371 | int i; | |
4372 | int res = 1; | |
4373 | ||
4374 | read_lock(&bond->lock); | |
4375 | ||
4376 | if (!BOND_IS_OK(bond)) { | |
4377 | goto out; | |
4378 | } | |
4379 | ||
169a3e66 | 4380 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
4381 | |
4382 | bond_for_each_slave(bond, slave, i) { | |
4383 | slave_no--; | |
4384 | if (slave_no < 0) { | |
4385 | break; | |
4386 | } | |
4387 | } | |
4388 | ||
4389 | start_at = slave; | |
4390 | ||
4391 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4392 | if (IS_UP(slave->dev) && | |
4393 | (slave->link == BOND_LINK_UP) && | |
4394 | (slave->state == BOND_STATE_ACTIVE)) { | |
4395 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4396 | break; | |
4397 | } | |
4398 | } | |
4399 | ||
4400 | out: | |
4401 | if (res) { | |
4402 | /* no suitable interface, frame not sent */ | |
4403 | dev_kfree_skb(skb); | |
4404 | } | |
4405 | read_unlock(&bond->lock); | |
4406 | return 0; | |
4407 | } | |
4408 | ||
4409 | /* | |
4410 | * in broadcast mode, we send everything to all usable interfaces. | |
4411 | */ | |
4412 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4413 | { | |
454d7c9b | 4414 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4415 | struct slave *slave, *start_at; |
4416 | struct net_device *tx_dev = NULL; | |
4417 | int i; | |
4418 | int res = 1; | |
4419 | ||
4420 | read_lock(&bond->lock); | |
4421 | ||
4422 | if (!BOND_IS_OK(bond)) { | |
4423 | goto out; | |
4424 | } | |
4425 | ||
4426 | read_lock(&bond->curr_slave_lock); | |
4427 | start_at = bond->curr_active_slave; | |
4428 | read_unlock(&bond->curr_slave_lock); | |
4429 | ||
4430 | if (!start_at) { | |
4431 | goto out; | |
4432 | } | |
4433 | ||
4434 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4435 | if (IS_UP(slave->dev) && | |
4436 | (slave->link == BOND_LINK_UP) && | |
4437 | (slave->state == BOND_STATE_ACTIVE)) { | |
4438 | if (tx_dev) { | |
4439 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4440 | if (!skb2) { | |
4441 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4442 | ": %s: Error: bond_xmit_broadcast(): " |
4443 | "skb_clone() failed\n", | |
4444 | bond_dev->name); | |
1da177e4 LT |
4445 | continue; |
4446 | } | |
4447 | ||
4448 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4449 | if (res) { | |
4450 | dev_kfree_skb(skb2); | |
4451 | continue; | |
4452 | } | |
4453 | } | |
4454 | tx_dev = slave->dev; | |
4455 | } | |
4456 | } | |
4457 | ||
4458 | if (tx_dev) { | |
4459 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4460 | } | |
4461 | ||
4462 | out: | |
4463 | if (res) { | |
4464 | /* no suitable interface, frame not sent */ | |
4465 | dev_kfree_skb(skb); | |
4466 | } | |
4467 | /* frame sent to all suitable interfaces */ | |
4468 | read_unlock(&bond->lock); | |
4469 | return 0; | |
4470 | } | |
4471 | ||
4472 | /*------------------------- Device initialization ---------------------------*/ | |
4473 | ||
6f6652be JV |
4474 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4475 | { | |
4476 | switch (bond->params.xmit_policy) { | |
4477 | case BOND_XMIT_POLICY_LAYER23: | |
4478 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4479 | break; | |
4480 | case BOND_XMIT_POLICY_LAYER34: | |
4481 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4482 | break; | |
4483 | case BOND_XMIT_POLICY_LAYER2: | |
4484 | default: | |
4485 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4486 | break; | |
4487 | } | |
4488 | } | |
4489 | ||
00829823 SH |
4490 | static int bond_start_xmit(struct sk_buff *skb, struct net_device *dev) |
4491 | { | |
4492 | const struct bonding *bond = netdev_priv(dev); | |
4493 | ||
4494 | switch (bond->params.mode) { | |
4495 | case BOND_MODE_ROUNDROBIN: | |
4496 | return bond_xmit_roundrobin(skb, dev); | |
4497 | case BOND_MODE_ACTIVEBACKUP: | |
4498 | return bond_xmit_activebackup(skb, dev); | |
4499 | case BOND_MODE_XOR: | |
4500 | return bond_xmit_xor(skb, dev); | |
4501 | case BOND_MODE_BROADCAST: | |
4502 | return bond_xmit_broadcast(skb, dev); | |
4503 | case BOND_MODE_8023AD: | |
4504 | return bond_3ad_xmit_xor(skb, dev); | |
4505 | case BOND_MODE_ALB: | |
4506 | case BOND_MODE_TLB: | |
4507 | return bond_alb_xmit(skb, dev); | |
4508 | default: | |
4509 | /* Should never happen, mode already checked */ | |
4510 | printk(KERN_ERR DRV_NAME ": %s: Error: Unknown bonding mode %d\n", | |
4511 | dev->name, bond->params.mode); | |
4512 | WARN_ON_ONCE(1); | |
4513 | dev_kfree_skb(skb); | |
4514 | return NETDEV_TX_OK; | |
4515 | } | |
4516 | } | |
4517 | ||
4518 | ||
1da177e4 LT |
4519 | /* |
4520 | * set bond mode specific net device operations | |
4521 | */ | |
a77b5325 | 4522 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4523 | { |
169a3e66 JV |
4524 | struct net_device *bond_dev = bond->dev; |
4525 | ||
1da177e4 LT |
4526 | switch (mode) { |
4527 | case BOND_MODE_ROUNDROBIN: | |
1da177e4 LT |
4528 | break; |
4529 | case BOND_MODE_ACTIVEBACKUP: | |
1da177e4 LT |
4530 | break; |
4531 | case BOND_MODE_XOR: | |
6f6652be | 4532 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4533 | break; |
4534 | case BOND_MODE_BROADCAST: | |
1da177e4 LT |
4535 | break; |
4536 | case BOND_MODE_8023AD: | |
8f903c70 | 4537 | bond_set_master_3ad_flags(bond); |
6f6652be | 4538 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4539 | break; |
1da177e4 | 4540 | case BOND_MODE_ALB: |
8f903c70 JV |
4541 | bond_set_master_alb_flags(bond); |
4542 | /* FALLTHRU */ | |
4543 | case BOND_MODE_TLB: | |
1da177e4 LT |
4544 | break; |
4545 | default: | |
4546 | /* Should never happen, mode already checked */ | |
4547 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4548 | ": %s: Error: Unknown bonding mode %d\n", |
4549 | bond_dev->name, | |
1da177e4 LT |
4550 | mode); |
4551 | break; | |
4552 | } | |
4553 | } | |
4554 | ||
217df670 JV |
4555 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4556 | struct ethtool_drvinfo *drvinfo) | |
4557 | { | |
4558 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4559 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4560 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4561 | } | |
4562 | ||
7282d491 | 4563 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4564 | .get_drvinfo = bond_ethtool_get_drvinfo, |
fa53ebac SH |
4565 | .get_link = ethtool_op_get_link, |
4566 | .get_tx_csum = ethtool_op_get_tx_csum, | |
4567 | .get_sg = ethtool_op_get_sg, | |
4568 | .get_tso = ethtool_op_get_tso, | |
4569 | .get_ufo = ethtool_op_get_ufo, | |
4570 | .get_flags = ethtool_op_get_flags, | |
8531c5ff AK |
4571 | }; |
4572 | ||
eb7cc59a SH |
4573 | static const struct net_device_ops bond_netdev_ops = { |
4574 | .ndo_open = bond_open, | |
4575 | .ndo_stop = bond_close, | |
00829823 | 4576 | .ndo_start_xmit = bond_start_xmit, |
eb7cc59a SH |
4577 | .ndo_get_stats = bond_get_stats, |
4578 | .ndo_do_ioctl = bond_do_ioctl, | |
4579 | .ndo_set_multicast_list = bond_set_multicast_list, | |
4580 | .ndo_change_mtu = bond_change_mtu, | |
eb7cc59a | 4581 | .ndo_set_mac_address = bond_set_mac_address, |
00829823 | 4582 | .ndo_neigh_setup = bond_neigh_setup, |
eb7cc59a SH |
4583 | .ndo_vlan_rx_register = bond_vlan_rx_register, |
4584 | .ndo_vlan_rx_add_vid = bond_vlan_rx_add_vid, | |
4585 | .ndo_vlan_rx_kill_vid = bond_vlan_rx_kill_vid, | |
4586 | }; | |
4587 | ||
1da177e4 LT |
4588 | /* |
4589 | * Does not allocate but creates a /proc entry. | |
4590 | * Allowed to fail. | |
4591 | */ | |
3c535952 | 4592 | static int bond_init(struct net_device *bond_dev, struct bond_params *params) |
1da177e4 | 4593 | { |
454d7c9b | 4594 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
4595 | |
4596 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4597 | ||
4598 | /* initialize rwlocks */ | |
4599 | rwlock_init(&bond->lock); | |
4600 | rwlock_init(&bond->curr_slave_lock); | |
4601 | ||
4602 | bond->params = *params; /* copy params struct */ | |
4603 | ||
1b76b316 JV |
4604 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4605 | if (!bond->wq) | |
4606 | return -ENOMEM; | |
4607 | ||
1da177e4 LT |
4608 | /* Initialize pointers */ |
4609 | bond->first_slave = NULL; | |
4610 | bond->curr_active_slave = NULL; | |
4611 | bond->current_arp_slave = NULL; | |
4612 | bond->primary_slave = NULL; | |
4613 | bond->dev = bond_dev; | |
1053f62c | 4614 | bond->send_grat_arp = 0; |
305d552a | 4615 | bond->send_unsol_na = 0; |
d90a162a | 4616 | bond->setup_by_slave = 0; |
1da177e4 LT |
4617 | INIT_LIST_HEAD(&bond->vlan_list); |
4618 | ||
4619 | /* Initialize the device entry points */ | |
eb7cc59a | 4620 | bond_dev->netdev_ops = &bond_netdev_ops; |
8531c5ff | 4621 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
169a3e66 | 4622 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 | 4623 | |
a434e43f | 4624 | bond_dev->destructor = bond_destructor; |
1da177e4 LT |
4625 | |
4626 | /* Initialize the device options */ | |
4627 | bond_dev->tx_queue_len = 0; | |
4628 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4629 | bond_dev->priv_flags |= IFF_BONDING; |
6cf3f41e JV |
4630 | if (bond->params.arp_interval) |
4631 | bond_dev->priv_flags |= IFF_MASTER_ARPMON; | |
1da177e4 LT |
4632 | |
4633 | /* At first, we block adding VLANs. That's the only way to | |
4634 | * prevent problems that occur when adding VLANs over an | |
4635 | * empty bond. The block will be removed once non-challenged | |
4636 | * slaves are enslaved. | |
4637 | */ | |
4638 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4639 | ||
932ff279 | 4640 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4641 | * transmitting */ |
4642 | bond_dev->features |= NETIF_F_LLTX; | |
4643 | ||
4644 | /* By default, we declare the bond to be fully | |
4645 | * VLAN hardware accelerated capable. Special | |
4646 | * care is taken in the various xmit functions | |
4647 | * when there are slaves that are not hw accel | |
4648 | * capable | |
4649 | */ | |
1da177e4 LT |
4650 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | |
4651 | NETIF_F_HW_VLAN_RX | | |
4652 | NETIF_F_HW_VLAN_FILTER); | |
4653 | ||
4654 | #ifdef CONFIG_PROC_FS | |
4655 | bond_create_proc_entry(bond); | |
4656 | #endif | |
1da177e4 LT |
4657 | list_add_tail(&bond->bond_list, &bond_dev_list); |
4658 | ||
4659 | return 0; | |
4660 | } | |
4661 | ||
fdaea7a9 JV |
4662 | static void bond_work_cancel_all(struct bonding *bond) |
4663 | { | |
4664 | write_lock_bh(&bond->lock); | |
4665 | bond->kill_timers = 1; | |
4666 | write_unlock_bh(&bond->lock); | |
4667 | ||
4668 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4669 | cancel_delayed_work(&bond->mii_work); | |
4670 | ||
4671 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4672 | cancel_delayed_work(&bond->arp_work); | |
4673 | ||
4674 | if (bond->params.mode == BOND_MODE_ALB && | |
4675 | delayed_work_pending(&bond->alb_work)) | |
4676 | cancel_delayed_work(&bond->alb_work); | |
4677 | ||
4678 | if (bond->params.mode == BOND_MODE_8023AD && | |
4679 | delayed_work_pending(&bond->ad_work)) | |
4680 | cancel_delayed_work(&bond->ad_work); | |
4681 | } | |
4682 | ||
a434e43f JV |
4683 | /* De-initialize device specific data. |
4684 | * Caller must hold rtnl_lock. | |
4685 | */ | |
4686 | static void bond_deinit(struct net_device *bond_dev) | |
4687 | { | |
454d7c9b | 4688 | struct bonding *bond = netdev_priv(bond_dev); |
a434e43f JV |
4689 | |
4690 | list_del(&bond->bond_list); | |
4691 | ||
4692 | bond_work_cancel_all(bond); | |
4693 | ||
4694 | #ifdef CONFIG_PROC_FS | |
4695 | bond_remove_proc_entry(bond); | |
4696 | #endif | |
4697 | } | |
4698 | ||
1da177e4 LT |
4699 | /* Unregister and free all bond devices. |
4700 | * Caller must hold rtnl_lock. | |
4701 | */ | |
4702 | static void bond_free_all(void) | |
4703 | { | |
4704 | struct bonding *bond, *nxt; | |
4705 | ||
4706 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4707 | struct net_device *bond_dev = bond->dev; | |
4708 | ||
fdaea7a9 | 4709 | bond_work_cancel_all(bond); |
70298705 | 4710 | /* Release the bonded slaves */ |
4711 | bond_release_all(bond_dev); | |
92b41daa | 4712 | bond_destroy(bond); |
1da177e4 LT |
4713 | } |
4714 | ||
4715 | #ifdef CONFIG_PROC_FS | |
4716 | bond_destroy_proc_dir(); | |
4717 | #endif | |
4718 | } | |
4719 | ||
4720 | /*------------------------- Module initialization ---------------------------*/ | |
4721 | ||
4722 | /* | |
4723 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4724 | * number of the mode or its string name. A bit complicated because |
4725 | * some mode names are substrings of other names, and calls from sysfs | |
4726 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4727 | */ |
ece95f7f | 4728 | int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl) |
1da177e4 | 4729 | { |
ece95f7f | 4730 | int mode = -1, i, rv; |
a42e534f | 4731 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4732 | |
a42e534f JV |
4733 | for (p = (char *)buf; *p; p++) |
4734 | if (!(isdigit(*p) || isspace(*p))) | |
4735 | break; | |
4736 | ||
4737 | if (*p) | |
ece95f7f | 4738 | rv = sscanf(buf, "%20s", modestr); |
a42e534f JV |
4739 | else |
4740 | rv = sscanf(buf, "%d", &mode); | |
4741 | ||
4742 | if (!rv) | |
4743 | return -1; | |
1da177e4 LT |
4744 | |
4745 | for (i = 0; tbl[i].modename; i++) { | |
ece95f7f JV |
4746 | if (mode == tbl[i].mode) |
4747 | return tbl[i].mode; | |
4748 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4749 | return tbl[i].mode; |
1da177e4 LT |
4750 | } |
4751 | ||
4752 | return -1; | |
4753 | } | |
4754 | ||
4755 | static int bond_check_params(struct bond_params *params) | |
4756 | { | |
3915c1e8 | 4757 | int arp_validate_value, fail_over_mac_value; |
f5b2b966 | 4758 | |
1da177e4 LT |
4759 | /* |
4760 | * Convert string parameters. | |
4761 | */ | |
4762 | if (mode) { | |
4763 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4764 | if (bond_mode == -1) { | |
4765 | printk(KERN_ERR DRV_NAME | |
4766 | ": Error: Invalid bonding mode \"%s\"\n", | |
4767 | mode == NULL ? "NULL" : mode); | |
4768 | return -EINVAL; | |
4769 | } | |
4770 | } | |
4771 | ||
169a3e66 JV |
4772 | if (xmit_hash_policy) { |
4773 | if ((bond_mode != BOND_MODE_XOR) && | |
4774 | (bond_mode != BOND_MODE_8023AD)) { | |
4775 | printk(KERN_INFO DRV_NAME | |
4776 | ": xor_mode param is irrelevant in mode %s\n", | |
4777 | bond_mode_name(bond_mode)); | |
4778 | } else { | |
4779 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4780 | xmit_hashtype_tbl); | |
4781 | if (xmit_hashtype == -1) { | |
4782 | printk(KERN_ERR DRV_NAME | |
4783 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4784 | xmit_hash_policy == NULL ? "NULL" : | |
4785 | xmit_hash_policy); | |
4786 | return -EINVAL; | |
4787 | } | |
4788 | } | |
4789 | } | |
4790 | ||
1da177e4 LT |
4791 | if (lacp_rate) { |
4792 | if (bond_mode != BOND_MODE_8023AD) { | |
4793 | printk(KERN_INFO DRV_NAME | |
4794 | ": lacp_rate param is irrelevant in mode %s\n", | |
4795 | bond_mode_name(bond_mode)); | |
4796 | } else { | |
4797 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4798 | if (lacp_fast == -1) { | |
4799 | printk(KERN_ERR DRV_NAME | |
4800 | ": Error: Invalid lacp rate \"%s\"\n", | |
4801 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4802 | return -EINVAL; | |
4803 | } | |
4804 | } | |
4805 | } | |
4806 | ||
fd989c83 JV |
4807 | if (ad_select) { |
4808 | params->ad_select = bond_parse_parm(ad_select, ad_select_tbl); | |
4809 | if (params->ad_select == -1) { | |
4810 | printk(KERN_ERR DRV_NAME | |
4811 | ": Error: Invalid ad_select \"%s\"\n", | |
4812 | ad_select == NULL ? "NULL" : ad_select); | |
4813 | return -EINVAL; | |
4814 | } | |
4815 | ||
4816 | if (bond_mode != BOND_MODE_8023AD) { | |
4817 | printk(KERN_WARNING DRV_NAME | |
4818 | ": ad_select param only affects 802.3ad mode\n"); | |
4819 | } | |
4820 | } else { | |
4821 | params->ad_select = BOND_AD_STABLE; | |
4822 | } | |
4823 | ||
b8a9787e | 4824 | if (max_bonds < 0 || max_bonds > INT_MAX) { |
1da177e4 LT |
4825 | printk(KERN_WARNING DRV_NAME |
4826 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4e0952c7 | 4827 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
b8a9787e | 4828 | max_bonds, 0, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
1da177e4 LT |
4829 | max_bonds = BOND_DEFAULT_MAX_BONDS; |
4830 | } | |
4831 | ||
4832 | if (miimon < 0) { | |
4833 | printk(KERN_WARNING DRV_NAME | |
4834 | ": Warning: miimon module parameter (%d), " | |
4835 | "not in range 0-%d, so it was reset to %d\n", | |
4836 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4837 | miimon = BOND_LINK_MON_INTERV; | |
4838 | } | |
4839 | ||
4840 | if (updelay < 0) { | |
4841 | printk(KERN_WARNING DRV_NAME | |
4842 | ": Warning: updelay module parameter (%d), " | |
4843 | "not in range 0-%d, so it was reset to 0\n", | |
4844 | updelay, INT_MAX); | |
4845 | updelay = 0; | |
4846 | } | |
4847 | ||
4848 | if (downdelay < 0) { | |
4849 | printk(KERN_WARNING DRV_NAME | |
4850 | ": Warning: downdelay module parameter (%d), " | |
4851 | "not in range 0-%d, so it was reset to 0\n", | |
4852 | downdelay, INT_MAX); | |
4853 | downdelay = 0; | |
4854 | } | |
4855 | ||
4856 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4857 | printk(KERN_WARNING DRV_NAME | |
4858 | ": Warning: use_carrier module parameter (%d), " | |
4859 | "not of valid value (0/1), so it was set to 1\n", | |
4860 | use_carrier); | |
4861 | use_carrier = 1; | |
4862 | } | |
4863 | ||
7893b249 MS |
4864 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
4865 | printk(KERN_WARNING DRV_NAME | |
4866 | ": Warning: num_grat_arp (%d) not in range 0-255 so it " | |
4867 | "was reset to 1 \n", num_grat_arp); | |
4868 | num_grat_arp = 1; | |
4869 | } | |
4870 | ||
305d552a BH |
4871 | if (num_unsol_na < 0 || num_unsol_na > 255) { |
4872 | printk(KERN_WARNING DRV_NAME | |
4873 | ": Warning: num_unsol_na (%d) not in range 0-255 so it " | |
4874 | "was reset to 1 \n", num_unsol_na); | |
4875 | num_unsol_na = 1; | |
4876 | } | |
4877 | ||
1da177e4 LT |
4878 | /* reset values for 802.3ad */ |
4879 | if (bond_mode == BOND_MODE_8023AD) { | |
4880 | if (!miimon) { | |
4881 | printk(KERN_WARNING DRV_NAME | |
4882 | ": Warning: miimon must be specified, " | |
4883 | "otherwise bonding will not detect link " | |
4884 | "failure, speed and duplex which are " | |
4885 | "essential for 802.3ad operation\n"); | |
4886 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4887 | miimon = 100; | |
4888 | } | |
4889 | } | |
4890 | ||
4891 | /* reset values for TLB/ALB */ | |
4892 | if ((bond_mode == BOND_MODE_TLB) || | |
4893 | (bond_mode == BOND_MODE_ALB)) { | |
4894 | if (!miimon) { | |
4895 | printk(KERN_WARNING DRV_NAME | |
4896 | ": Warning: miimon must be specified, " | |
4897 | "otherwise bonding will not detect link " | |
4898 | "failure and link speed which are essential " | |
4899 | "for TLB/ALB load balancing\n"); | |
4900 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4901 | miimon = 100; | |
4902 | } | |
4903 | } | |
4904 | ||
4905 | if (bond_mode == BOND_MODE_ALB) { | |
4906 | printk(KERN_NOTICE DRV_NAME | |
4907 | ": In ALB mode you might experience client " | |
4908 | "disconnections upon reconnection of a link if the " | |
4909 | "bonding module updelay parameter (%d msec) is " | |
4910 | "incompatible with the forwarding delay time of the " | |
4911 | "switch\n", | |
4912 | updelay); | |
4913 | } | |
4914 | ||
4915 | if (!miimon) { | |
4916 | if (updelay || downdelay) { | |
4917 | /* just warn the user the up/down delay will have | |
4918 | * no effect since miimon is zero... | |
4919 | */ | |
4920 | printk(KERN_WARNING DRV_NAME | |
4921 | ": Warning: miimon module parameter not set " | |
4922 | "and updelay (%d) or downdelay (%d) module " | |
4923 | "parameter is set; updelay and downdelay have " | |
4924 | "no effect unless miimon is set\n", | |
4925 | updelay, downdelay); | |
4926 | } | |
4927 | } else { | |
4928 | /* don't allow arp monitoring */ | |
4929 | if (arp_interval) { | |
4930 | printk(KERN_WARNING DRV_NAME | |
4931 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4932 | "can't be used simultaneously, disabling ARP " | |
4933 | "monitoring\n", | |
4934 | miimon, arp_interval); | |
4935 | arp_interval = 0; | |
4936 | } | |
4937 | ||
4938 | if ((updelay % miimon) != 0) { | |
4939 | printk(KERN_WARNING DRV_NAME | |
4940 | ": Warning: updelay (%d) is not a multiple " | |
4941 | "of miimon (%d), updelay rounded to %d ms\n", | |
4942 | updelay, miimon, (updelay / miimon) * miimon); | |
4943 | } | |
4944 | ||
4945 | updelay /= miimon; | |
4946 | ||
4947 | if ((downdelay % miimon) != 0) { | |
4948 | printk(KERN_WARNING DRV_NAME | |
4949 | ": Warning: downdelay (%d) is not a multiple " | |
4950 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4951 | downdelay, miimon, | |
4952 | (downdelay / miimon) * miimon); | |
4953 | } | |
4954 | ||
4955 | downdelay /= miimon; | |
4956 | } | |
4957 | ||
4958 | if (arp_interval < 0) { | |
4959 | printk(KERN_WARNING DRV_NAME | |
4960 | ": Warning: arp_interval module parameter (%d) " | |
4961 | ", not in range 0-%d, so it was reset to %d\n", | |
4962 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4963 | arp_interval = BOND_LINK_ARP_INTERV; | |
4964 | } | |
4965 | ||
4966 | for (arp_ip_count = 0; | |
4967 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4968 | arp_ip_count++) { | |
4969 | /* not complete check, but should be good enough to | |
4970 | catch mistakes */ | |
4971 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4972 | printk(KERN_WARNING DRV_NAME | |
4973 | ": Warning: bad arp_ip_target module parameter " | |
4974 | "(%s), ARP monitoring will not be performed\n", | |
4975 | arp_ip_target[arp_ip_count]); | |
4976 | arp_interval = 0; | |
4977 | } else { | |
d3bb52b0 | 4978 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4979 | arp_target[arp_ip_count] = ip; |
4980 | } | |
4981 | } | |
4982 | ||
4983 | if (arp_interval && !arp_ip_count) { | |
4984 | /* don't allow arping if no arp_ip_target given... */ | |
4985 | printk(KERN_WARNING DRV_NAME | |
4986 | ": Warning: arp_interval module parameter (%d) " | |
4987 | "specified without providing an arp_ip_target " | |
4988 | "parameter, arp_interval was reset to 0\n", | |
4989 | arp_interval); | |
4990 | arp_interval = 0; | |
4991 | } | |
4992 | ||
f5b2b966 JV |
4993 | if (arp_validate) { |
4994 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
4995 | printk(KERN_ERR DRV_NAME | |
4996 | ": arp_validate only supported in active-backup mode\n"); | |
4997 | return -EINVAL; | |
4998 | } | |
4999 | if (!arp_interval) { | |
5000 | printk(KERN_ERR DRV_NAME | |
5001 | ": arp_validate requires arp_interval\n"); | |
5002 | return -EINVAL; | |
5003 | } | |
5004 | ||
5005 | arp_validate_value = bond_parse_parm(arp_validate, | |
5006 | arp_validate_tbl); | |
5007 | if (arp_validate_value == -1) { | |
5008 | printk(KERN_ERR DRV_NAME | |
5009 | ": Error: invalid arp_validate \"%s\"\n", | |
5010 | arp_validate == NULL ? "NULL" : arp_validate); | |
5011 | return -EINVAL; | |
5012 | } | |
5013 | } else | |
5014 | arp_validate_value = 0; | |
5015 | ||
1da177e4 LT |
5016 | if (miimon) { |
5017 | printk(KERN_INFO DRV_NAME | |
5018 | ": MII link monitoring set to %d ms\n", | |
5019 | miimon); | |
5020 | } else if (arp_interval) { | |
5021 | int i; | |
5022 | ||
5023 | printk(KERN_INFO DRV_NAME | |
f5b2b966 JV |
5024 | ": ARP monitoring set to %d ms, validate %s, with %d target(s):", |
5025 | arp_interval, | |
5026 | arp_validate_tbl[arp_validate_value].modename, | |
5027 | arp_ip_count); | |
1da177e4 LT |
5028 | |
5029 | for (i = 0; i < arp_ip_count; i++) | |
5030 | printk (" %s", arp_ip_target[i]); | |
5031 | ||
5032 | printk("\n"); | |
5033 | ||
b8a9787e | 5034 | } else if (max_bonds) { |
1da177e4 LT |
5035 | /* miimon and arp_interval not set, we need one so things |
5036 | * work as expected, see bonding.txt for details | |
5037 | */ | |
5038 | printk(KERN_WARNING DRV_NAME | |
5039 | ": Warning: either miimon or arp_interval and " | |
5040 | "arp_ip_target module parameters must be specified, " | |
5041 | "otherwise bonding will not detect link failures! see " | |
5042 | "bonding.txt for details.\n"); | |
5043 | } | |
5044 | ||
5045 | if (primary && !USES_PRIMARY(bond_mode)) { | |
5046 | /* currently, using a primary only makes sense | |
5047 | * in active backup, TLB or ALB modes | |
5048 | */ | |
5049 | printk(KERN_WARNING DRV_NAME | |
5050 | ": Warning: %s primary device specified but has no " | |
5051 | "effect in %s mode\n", | |
5052 | primary, bond_mode_name(bond_mode)); | |
5053 | primary = NULL; | |
5054 | } | |
5055 | ||
3915c1e8 JV |
5056 | if (fail_over_mac) { |
5057 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
5058 | fail_over_mac_tbl); | |
5059 | if (fail_over_mac_value == -1) { | |
5060 | printk(KERN_ERR DRV_NAME | |
5061 | ": Error: invalid fail_over_mac \"%s\"\n", | |
5062 | arp_validate == NULL ? "NULL" : arp_validate); | |
5063 | return -EINVAL; | |
5064 | } | |
5065 | ||
5066 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
5067 | printk(KERN_WARNING DRV_NAME | |
5068 | ": Warning: fail_over_mac only affects " | |
5069 | "active-backup mode.\n"); | |
5070 | } else { | |
5071 | fail_over_mac_value = BOND_FOM_NONE; | |
5072 | } | |
dd957c57 | 5073 | |
1da177e4 LT |
5074 | /* fill params struct with the proper values */ |
5075 | params->mode = bond_mode; | |
169a3e66 | 5076 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 5077 | params->miimon = miimon; |
7893b249 | 5078 | params->num_grat_arp = num_grat_arp; |
305d552a | 5079 | params->num_unsol_na = num_unsol_na; |
1da177e4 | 5080 | params->arp_interval = arp_interval; |
f5b2b966 | 5081 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
5082 | params->updelay = updelay; |
5083 | params->downdelay = downdelay; | |
5084 | params->use_carrier = use_carrier; | |
5085 | params->lacp_fast = lacp_fast; | |
5086 | params->primary[0] = 0; | |
3915c1e8 | 5087 | params->fail_over_mac = fail_over_mac_value; |
1da177e4 LT |
5088 | |
5089 | if (primary) { | |
5090 | strncpy(params->primary, primary, IFNAMSIZ); | |
5091 | params->primary[IFNAMSIZ - 1] = 0; | |
5092 | } | |
5093 | ||
5094 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
5095 | ||
5096 | return 0; | |
5097 | } | |
5098 | ||
0daa2303 | 5099 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
cf508b12 | 5100 | static struct lock_class_key bonding_netdev_addr_lock_key; |
0daa2303 | 5101 | |
e8a0464c DM |
5102 | static void bond_set_lockdep_class_one(struct net_device *dev, |
5103 | struct netdev_queue *txq, | |
5104 | void *_unused) | |
c773e847 DM |
5105 | { |
5106 | lockdep_set_class(&txq->_xmit_lock, | |
5107 | &bonding_netdev_xmit_lock_key); | |
5108 | } | |
5109 | ||
5110 | static void bond_set_lockdep_class(struct net_device *dev) | |
5111 | { | |
cf508b12 DM |
5112 | lockdep_set_class(&dev->addr_list_lock, |
5113 | &bonding_netdev_addr_lock_key); | |
e8a0464c | 5114 | netdev_for_each_tx_queue(dev, bond_set_lockdep_class_one, NULL); |
c773e847 DM |
5115 | } |
5116 | ||
dfe60397 | 5117 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 5118 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
5119 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
5120 | * set up our sysfs entries. | |
5121 | */ | |
0dd646fe | 5122 | int bond_create(char *name, struct bond_params *params) |
dfe60397 MW |
5123 | { |
5124 | struct net_device *bond_dev; | |
0883beca | 5125 | struct bonding *bond; |
dfe60397 MW |
5126 | int res; |
5127 | ||
5128 | rtnl_lock(); | |
027ea041 JV |
5129 | down_write(&bonding_rwsem); |
5130 | ||
5131 | /* Check to see if the bond already exists. */ | |
4fe4763c | 5132 | if (name) { |
0883beca | 5133 | list_for_each_entry(bond, &bond_dev_list, bond_list) |
4fe4763c JV |
5134 | if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) { |
5135 | printk(KERN_ERR DRV_NAME | |
027ea041 | 5136 | ": cannot add bond %s; it already exists\n", |
4fe4763c JV |
5137 | name); |
5138 | res = -EPERM; | |
5139 | goto out_rtnl; | |
5140 | } | |
5141 | } | |
027ea041 | 5142 | |
e4b91c48 JV |
5143 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
5144 | ether_setup); | |
dfe60397 MW |
5145 | if (!bond_dev) { |
5146 | printk(KERN_ERR DRV_NAME | |
5147 | ": %s: eek! can't alloc netdev!\n", | |
5148 | name); | |
5149 | res = -ENOMEM; | |
5150 | goto out_rtnl; | |
5151 | } | |
5152 | ||
e4b91c48 JV |
5153 | if (!name) { |
5154 | res = dev_alloc_name(bond_dev, "bond%d"); | |
5155 | if (res < 0) | |
5156 | goto out_netdev; | |
5157 | } | |
5158 | ||
dfe60397 MW |
5159 | /* bond_init() must be called after dev_alloc_name() (for the |
5160 | * /proc files), but before register_netdevice(), because we | |
5161 | * need to set function pointers. | |
5162 | */ | |
5163 | ||
5164 | res = bond_init(bond_dev, params); | |
5165 | if (res < 0) { | |
5166 | goto out_netdev; | |
5167 | } | |
5168 | ||
dfe60397 MW |
5169 | res = register_netdevice(bond_dev); |
5170 | if (res < 0) { | |
5171 | goto out_bond; | |
5172 | } | |
0daa2303 | 5173 | |
c773e847 | 5174 | bond_set_lockdep_class(bond_dev); |
0daa2303 | 5175 | |
ff59c456 JV |
5176 | netif_carrier_off(bond_dev); |
5177 | ||
027ea041 | 5178 | up_write(&bonding_rwsem); |
dfe60397 | 5179 | rtnl_unlock(); /* allows sysfs registration of net device */ |
454d7c9b | 5180 | res = bond_create_sysfs_entry(netdev_priv(bond_dev)); |
09c89279 JV |
5181 | if (res < 0) { |
5182 | rtnl_lock(); | |
027ea041 | 5183 | down_write(&bonding_rwsem); |
822973ba PE |
5184 | bond_deinit(bond_dev); |
5185 | unregister_netdevice(bond_dev); | |
5186 | goto out_rtnl; | |
09c89279 JV |
5187 | } |
5188 | ||
5189 | return 0; | |
5190 | ||
dfe60397 MW |
5191 | out_bond: |
5192 | bond_deinit(bond_dev); | |
5193 | out_netdev: | |
5194 | free_netdev(bond_dev); | |
5195 | out_rtnl: | |
027ea041 | 5196 | up_write(&bonding_rwsem); |
dfe60397 | 5197 | rtnl_unlock(); |
dfe60397 MW |
5198 | return res; |
5199 | } | |
5200 | ||
1da177e4 LT |
5201 | static int __init bonding_init(void) |
5202 | { | |
1da177e4 LT |
5203 | int i; |
5204 | int res; | |
0883beca | 5205 | struct bonding *bond; |
1da177e4 LT |
5206 | |
5207 | printk(KERN_INFO "%s", version); | |
5208 | ||
dfe60397 | 5209 | res = bond_check_params(&bonding_defaults); |
1da177e4 | 5210 | if (res) { |
dfe60397 | 5211 | goto out; |
1da177e4 LT |
5212 | } |
5213 | ||
1da177e4 LT |
5214 | #ifdef CONFIG_PROC_FS |
5215 | bond_create_proc_dir(); | |
5216 | #endif | |
027ea041 JV |
5217 | |
5218 | init_rwsem(&bonding_rwsem); | |
5219 | ||
1da177e4 | 5220 | for (i = 0; i < max_bonds; i++) { |
0dd646fe | 5221 | res = bond_create(NULL, &bonding_defaults); |
dfe60397 MW |
5222 | if (res) |
5223 | goto err; | |
1da177e4 LT |
5224 | } |
5225 | ||
b76cdba9 MW |
5226 | res = bond_create_sysfs(); |
5227 | if (res) | |
5228 | goto err; | |
5229 | ||
1da177e4 | 5230 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5231 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5232 | bond_register_ipv6_notifier(); |
1da177e4 | 5233 | |
dfe60397 MW |
5234 | goto out; |
5235 | err: | |
0883beca | 5236 | list_for_each_entry(bond, &bond_dev_list, bond_list) { |
1b76b316 JV |
5237 | bond_work_cancel_all(bond); |
5238 | destroy_workqueue(bond->wq); | |
5239 | } | |
5240 | ||
ae68c398 PE |
5241 | bond_destroy_sysfs(); |
5242 | ||
40abc270 | 5243 | rtnl_lock(); |
1da177e4 | 5244 | bond_free_all(); |
1da177e4 | 5245 | rtnl_unlock(); |
dfe60397 | 5246 | out: |
1da177e4 | 5247 | return res; |
dfe60397 | 5248 | |
1da177e4 LT |
5249 | } |
5250 | ||
5251 | static void __exit bonding_exit(void) | |
5252 | { | |
5253 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5254 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
305d552a | 5255 | bond_unregister_ipv6_notifier(); |
1da177e4 | 5256 | |
ae68c398 PE |
5257 | bond_destroy_sysfs(); |
5258 | ||
1da177e4 LT |
5259 | rtnl_lock(); |
5260 | bond_free_all(); | |
5261 | rtnl_unlock(); | |
5262 | } | |
5263 | ||
5264 | module_init(bonding_init); | |
5265 | module_exit(bonding_exit); | |
5266 | MODULE_LICENSE("GPL"); | |
5267 | MODULE_VERSION(DRV_VERSION); | |
5268 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5269 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
5270 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
5271 | ||
5272 | /* | |
5273 | * Local variables: | |
5274 | * c-indent-level: 8 | |
5275 | * c-basic-offset: 8 | |
5276 | * tab-width: 8 | |
5277 | * End: | |
5278 | */ | |
5279 |