Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
34 | //#define BONDING_DEBUG 1 | |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/types.h> | |
40 | #include <linux/fcntl.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/ptrace.h> | |
43 | #include <linux/ioport.h> | |
44 | #include <linux/in.h> | |
169a3e66 | 45 | #include <net/ip.h> |
1da177e4 | 46 | #include <linux/ip.h> |
169a3e66 JV |
47 | #include <linux/tcp.h> |
48 | #include <linux/udp.h> | |
1da177e4 LT |
49 | #include <linux/slab.h> |
50 | #include <linux/string.h> | |
51 | #include <linux/init.h> | |
52 | #include <linux/timer.h> | |
53 | #include <linux/socket.h> | |
54 | #include <linux/ctype.h> | |
55 | #include <linux/inet.h> | |
56 | #include <linux/bitops.h> | |
57 | #include <asm/system.h> | |
58 | #include <asm/io.h> | |
59 | #include <asm/dma.h> | |
60 | #include <asm/uaccess.h> | |
61 | #include <linux/errno.h> | |
62 | #include <linux/netdevice.h> | |
63 | #include <linux/inetdevice.h> | |
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> | |
c3ade5ca | 77 | #include <net/route.h> |
1da177e4 LT |
78 | #include "bonding.h" |
79 | #include "bond_3ad.h" | |
80 | #include "bond_alb.h" | |
81 | ||
82 | /*---------------------------- Module parameters ----------------------------*/ | |
83 | ||
84 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
85 | #define BOND_LINK_MON_INTERV 0 | |
86 | #define BOND_LINK_ARP_INTERV 0 | |
87 | ||
88 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
89 | static int miimon = BOND_LINK_MON_INTERV; | |
90 | static int updelay = 0; | |
91 | static int downdelay = 0; | |
92 | static int use_carrier = 1; | |
93 | static char *mode = NULL; | |
94 | static char *primary = NULL; | |
95 | static char *lacp_rate = NULL; | |
169a3e66 | 96 | static char *xmit_hash_policy = NULL; |
1da177e4 LT |
97 | static int arp_interval = BOND_LINK_ARP_INTERV; |
98 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
12479f9a | 99 | struct bond_params bonding_defaults; |
1da177e4 LT |
100 | |
101 | module_param(max_bonds, int, 0); | |
102 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
103 | module_param(miimon, int, 0); | |
104 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
105 | module_param(updelay, int, 0); | |
106 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
107 | module_param(downdelay, int, 0); | |
2ac47660 MW |
108 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
109 | "in milliseconds"); | |
1da177e4 | 110 | module_param(use_carrier, int, 0); |
2ac47660 MW |
111 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
112 | "0 for off, 1 for on (default)"); | |
1da177e4 | 113 | module_param(mode, charp, 0); |
2ac47660 MW |
114 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
115 | "1 for active-backup, 2 for balance-xor, " | |
116 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
117 | "6 for balance-alb"); | |
1da177e4 LT |
118 | module_param(primary, charp, 0); |
119 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
120 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
121 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
122 | "(slow/fast)"); | |
169a3e66 | 123 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
124 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
125 | ", 1 for layer 3+4"); | |
1da177e4 LT |
126 | module_param(arp_interval, int, 0); |
127 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
128 | module_param_array(arp_ip_target, charp, NULL, 0); | |
129 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
130 | ||
131 | /*----------------------------- Global variables ----------------------------*/ | |
132 | ||
f71e1309 | 133 | static const char * const version = |
1da177e4 LT |
134 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
135 | ||
12479f9a | 136 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
137 | |
138 | #ifdef CONFIG_PROC_FS | |
139 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
140 | #endif | |
141 | ||
b76cdba9 | 142 | extern struct rw_semaphore bonding_rwsem; |
1da177e4 LT |
143 | static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; |
144 | static int arp_ip_count = 0; | |
1da177e4 | 145 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
169a3e66 | 146 | static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; |
1da177e4 | 147 | static int lacp_fast = 0; |
217df670 | 148 | |
1da177e4 | 149 | |
12479f9a | 150 | struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
151 | { "slow", AD_LACP_SLOW}, |
152 | { "fast", AD_LACP_FAST}, | |
153 | { NULL, -1}, | |
154 | }; | |
155 | ||
12479f9a | 156 | struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
157 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
158 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
159 | { "balance-xor", BOND_MODE_XOR}, | |
160 | { "broadcast", BOND_MODE_BROADCAST}, | |
161 | { "802.3ad", BOND_MODE_8023AD}, | |
162 | { "balance-tlb", BOND_MODE_TLB}, | |
163 | { "balance-alb", BOND_MODE_ALB}, | |
164 | { NULL, -1}, | |
165 | }; | |
166 | ||
12479f9a | 167 | struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
168 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
169 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
170 | { NULL, -1}, | |
171 | }; | |
172 | ||
1da177e4 LT |
173 | /*-------------------------- Forward declarations ---------------------------*/ |
174 | ||
c3ade5ca | 175 | static void bond_send_gratuitous_arp(struct bonding *bond); |
1da177e4 LT |
176 | |
177 | /*---------------------------- General routines -----------------------------*/ | |
178 | ||
a77b5325 | 179 | const char *bond_mode_name(int mode) |
1da177e4 LT |
180 | { |
181 | switch (mode) { | |
182 | case BOND_MODE_ROUNDROBIN : | |
183 | return "load balancing (round-robin)"; | |
184 | case BOND_MODE_ACTIVEBACKUP : | |
185 | return "fault-tolerance (active-backup)"; | |
186 | case BOND_MODE_XOR : | |
187 | return "load balancing (xor)"; | |
188 | case BOND_MODE_BROADCAST : | |
189 | return "fault-tolerance (broadcast)"; | |
190 | case BOND_MODE_8023AD: | |
191 | return "IEEE 802.3ad Dynamic link aggregation"; | |
192 | case BOND_MODE_TLB: | |
193 | return "transmit load balancing"; | |
194 | case BOND_MODE_ALB: | |
195 | return "adaptive load balancing"; | |
196 | default: | |
197 | return "unknown"; | |
198 | } | |
199 | } | |
200 | ||
201 | /*---------------------------------- VLAN -----------------------------------*/ | |
202 | ||
203 | /** | |
204 | * bond_add_vlan - add a new vlan id on bond | |
205 | * @bond: bond that got the notification | |
206 | * @vlan_id: the vlan id to add | |
207 | * | |
208 | * Returns -ENOMEM if allocation failed. | |
209 | */ | |
210 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
211 | { | |
212 | struct vlan_entry *vlan; | |
213 | ||
214 | dprintk("bond: %s, vlan id %d\n", | |
215 | (bond ? bond->dev->name: "None"), vlan_id); | |
216 | ||
217 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
218 | if (!vlan) { | |
219 | return -ENOMEM; | |
220 | } | |
221 | ||
222 | INIT_LIST_HEAD(&vlan->vlan_list); | |
223 | vlan->vlan_id = vlan_id; | |
c3ade5ca | 224 | vlan->vlan_ip = 0; |
1da177e4 LT |
225 | |
226 | write_lock_bh(&bond->lock); | |
227 | ||
228 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
229 | ||
230 | write_unlock_bh(&bond->lock); | |
231 | ||
232 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
233 | ||
234 | return 0; | |
235 | } | |
236 | ||
237 | /** | |
238 | * bond_del_vlan - delete a vlan id from bond | |
239 | * @bond: bond that got the notification | |
240 | * @vlan_id: the vlan id to delete | |
241 | * | |
242 | * returns -ENODEV if @vlan_id was not found in @bond. | |
243 | */ | |
244 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
245 | { | |
246 | struct vlan_entry *vlan, *next; | |
247 | int res = -ENODEV; | |
248 | ||
249 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
250 | ||
251 | write_lock_bh(&bond->lock); | |
252 | ||
253 | list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { | |
254 | if (vlan->vlan_id == vlan_id) { | |
255 | list_del(&vlan->vlan_list); | |
256 | ||
257 | if ((bond->params.mode == BOND_MODE_TLB) || | |
258 | (bond->params.mode == BOND_MODE_ALB)) { | |
259 | bond_alb_clear_vlan(bond, vlan_id); | |
260 | } | |
261 | ||
262 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
263 | bond->dev->name); | |
264 | ||
265 | kfree(vlan); | |
266 | ||
267 | if (list_empty(&bond->vlan_list) && | |
268 | (bond->slave_cnt == 0)) { | |
269 | /* Last VLAN removed and no slaves, so | |
270 | * restore block on adding VLANs. This will | |
271 | * be removed once new slaves that are not | |
272 | * VLAN challenged will be added. | |
273 | */ | |
274 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
275 | } | |
276 | ||
277 | res = 0; | |
278 | goto out; | |
279 | } | |
280 | } | |
281 | ||
282 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
283 | bond->dev->name); | |
284 | ||
285 | out: | |
286 | write_unlock_bh(&bond->lock); | |
287 | return res; | |
288 | } | |
289 | ||
290 | /** | |
291 | * bond_has_challenged_slaves | |
292 | * @bond: the bond we're working on | |
293 | * | |
294 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
295 | * was found, 0 otherwise. | |
296 | * | |
297 | * Assumes bond->lock is held. | |
298 | */ | |
299 | static int bond_has_challenged_slaves(struct bonding *bond) | |
300 | { | |
301 | struct slave *slave; | |
302 | int i; | |
303 | ||
304 | bond_for_each_slave(bond, slave, i) { | |
305 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
306 | dprintk("found VLAN challenged slave - %s\n", | |
307 | slave->dev->name); | |
308 | return 1; | |
309 | } | |
310 | } | |
311 | ||
312 | dprintk("no VLAN challenged slaves found\n"); | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /** | |
317 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
318 | * @bond: the bond we're working on | |
319 | * @curr: item we're advancing from | |
320 | * | |
321 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
322 | * or @curr->next otherwise (even if it is @curr itself again). | |
323 | * | |
324 | * Caller must hold bond->lock | |
325 | */ | |
326 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
327 | { | |
328 | struct vlan_entry *next, *last; | |
329 | ||
330 | if (list_empty(&bond->vlan_list)) { | |
331 | return NULL; | |
332 | } | |
333 | ||
334 | if (!curr) { | |
335 | next = list_entry(bond->vlan_list.next, | |
336 | struct vlan_entry, vlan_list); | |
337 | } else { | |
338 | last = list_entry(bond->vlan_list.prev, | |
339 | struct vlan_entry, vlan_list); | |
340 | if (last == curr) { | |
341 | next = list_entry(bond->vlan_list.next, | |
342 | struct vlan_entry, vlan_list); | |
343 | } else { | |
344 | next = list_entry(curr->vlan_list.next, | |
345 | struct vlan_entry, vlan_list); | |
346 | } | |
347 | } | |
348 | ||
349 | return next; | |
350 | } | |
351 | ||
352 | /** | |
353 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
354 | * | |
355 | * @bond: bond device that got this skb for tx. | |
356 | * @skb: hw accel VLAN tagged skb to transmit | |
357 | * @slave_dev: slave that is supposed to xmit this skbuff | |
358 | * | |
359 | * When the bond gets an skb to transmit that is | |
360 | * already hardware accelerated VLAN tagged, and it | |
361 | * needs to relay this skb to a slave that is not | |
362 | * hw accel capable, the skb needs to be "unaccelerated", | |
363 | * i.e. strip the hwaccel tag and re-insert it as part | |
364 | * of the payload. | |
365 | */ | |
366 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
367 | { | |
368 | unsigned short vlan_id; | |
369 | ||
370 | if (!list_empty(&bond->vlan_list) && | |
371 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
372 | vlan_get_tag(skb, &vlan_id) == 0) { | |
373 | skb->dev = slave_dev; | |
374 | skb = vlan_put_tag(skb, vlan_id); | |
375 | if (!skb) { | |
376 | /* vlan_put_tag() frees the skb in case of error, | |
377 | * so return success here so the calling functions | |
378 | * won't attempt to free is again. | |
379 | */ | |
380 | return 0; | |
381 | } | |
382 | } else { | |
383 | skb->dev = slave_dev; | |
384 | } | |
385 | ||
386 | skb->priority = 1; | |
387 | dev_queue_xmit(skb); | |
388 | ||
389 | return 0; | |
390 | } | |
391 | ||
392 | /* | |
393 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
394 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
395 | * lock because: | |
396 | * a. This operation is performed in IOCTL context, | |
397 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
398 | * c. Holding a lock with BH disabled while directly calling a base driver | |
399 | * entry point is generally a BAD idea. | |
400 | * | |
401 | * The design of synchronization/protection for this operation in the 8021q | |
402 | * module is good for one or more VLAN devices over a single physical device | |
403 | * and cannot be extended for a teaming solution like bonding, so there is a | |
404 | * potential race condition here where a net device from the vlan group might | |
405 | * be referenced (either by a base driver or the 8021q code) while it is being | |
406 | * removed from the system. However, it turns out we're not making matters | |
407 | * worse, and if it works for regular VLAN usage it will work here too. | |
408 | */ | |
409 | ||
410 | /** | |
411 | * bond_vlan_rx_register - Propagates registration to slaves | |
412 | * @bond_dev: bonding net device that got called | |
413 | * @grp: vlan group being registered | |
414 | */ | |
415 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
416 | { | |
417 | struct bonding *bond = bond_dev->priv; | |
418 | struct slave *slave; | |
419 | int i; | |
420 | ||
421 | bond->vlgrp = grp; | |
422 | ||
423 | bond_for_each_slave(bond, slave, i) { | |
424 | struct net_device *slave_dev = slave->dev; | |
425 | ||
426 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
427 | slave_dev->vlan_rx_register) { | |
428 | slave_dev->vlan_rx_register(slave_dev, grp); | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | /** | |
434 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
435 | * @bond_dev: bonding net device that got called | |
436 | * @vid: vlan id being added | |
437 | */ | |
438 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
439 | { | |
440 | struct bonding *bond = bond_dev->priv; | |
441 | struct slave *slave; | |
442 | int i, res; | |
443 | ||
444 | bond_for_each_slave(bond, slave, i) { | |
445 | struct net_device *slave_dev = slave->dev; | |
446 | ||
447 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
448 | slave_dev->vlan_rx_add_vid) { | |
449 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
450 | } | |
451 | } | |
452 | ||
453 | res = bond_add_vlan(bond, vid); | |
454 | if (res) { | |
455 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 456 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
457 | bond_dev->name, vid); |
458 | } | |
459 | } | |
460 | ||
461 | /** | |
462 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
463 | * @bond_dev: bonding net device that got called | |
464 | * @vid: vlan id being removed | |
465 | */ | |
466 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
467 | { | |
468 | struct bonding *bond = bond_dev->priv; | |
469 | struct slave *slave; | |
470 | struct net_device *vlan_dev; | |
471 | int i, res; | |
472 | ||
473 | bond_for_each_slave(bond, slave, i) { | |
474 | struct net_device *slave_dev = slave->dev; | |
475 | ||
476 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
477 | slave_dev->vlan_rx_kill_vid) { | |
478 | /* Save and then restore vlan_dev in the grp array, | |
479 | * since the slave's driver might clear it. | |
480 | */ | |
481 | vlan_dev = bond->vlgrp->vlan_devices[vid]; | |
482 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); | |
483 | bond->vlgrp->vlan_devices[vid] = vlan_dev; | |
484 | } | |
485 | } | |
486 | ||
487 | res = bond_del_vlan(bond, vid); | |
488 | if (res) { | |
489 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 490 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
491 | bond_dev->name, vid); |
492 | } | |
493 | } | |
494 | ||
495 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
496 | { | |
497 | struct vlan_entry *vlan; | |
498 | ||
499 | write_lock_bh(&bond->lock); | |
500 | ||
501 | if (list_empty(&bond->vlan_list)) { | |
502 | goto out; | |
503 | } | |
504 | ||
505 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
506 | slave_dev->vlan_rx_register) { | |
507 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
508 | } | |
509 | ||
510 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
511 | !(slave_dev->vlan_rx_add_vid)) { | |
512 | goto out; | |
513 | } | |
514 | ||
515 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
516 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
517 | } | |
518 | ||
519 | out: | |
520 | write_unlock_bh(&bond->lock); | |
521 | } | |
522 | ||
523 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
524 | { | |
525 | struct vlan_entry *vlan; | |
526 | struct net_device *vlan_dev; | |
527 | ||
528 | write_lock_bh(&bond->lock); | |
529 | ||
530 | if (list_empty(&bond->vlan_list)) { | |
531 | goto out; | |
532 | } | |
533 | ||
534 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
535 | !(slave_dev->vlan_rx_kill_vid)) { | |
536 | goto unreg; | |
537 | } | |
538 | ||
539 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
540 | /* Save and then restore vlan_dev in the grp array, | |
541 | * since the slave's driver might clear it. | |
542 | */ | |
543 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
544 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); | |
545 | bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; | |
546 | } | |
547 | ||
548 | unreg: | |
549 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
550 | slave_dev->vlan_rx_register) { | |
551 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
552 | } | |
553 | ||
554 | out: | |
555 | write_unlock_bh(&bond->lock); | |
556 | } | |
557 | ||
558 | /*------------------------------- Link status -------------------------------*/ | |
559 | ||
ff59c456 JV |
560 | /* |
561 | * Set the carrier state for the master according to the state of its | |
562 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
563 | * do special 802.3ad magic. | |
564 | * | |
565 | * Returns zero if carrier state does not change, nonzero if it does. | |
566 | */ | |
567 | static int bond_set_carrier(struct bonding *bond) | |
568 | { | |
569 | struct slave *slave; | |
570 | int i; | |
571 | ||
572 | if (bond->slave_cnt == 0) | |
573 | goto down; | |
574 | ||
575 | if (bond->params.mode == BOND_MODE_8023AD) | |
576 | return bond_3ad_set_carrier(bond); | |
577 | ||
578 | bond_for_each_slave(bond, slave, i) { | |
579 | if (slave->link == BOND_LINK_UP) { | |
580 | if (!netif_carrier_ok(bond->dev)) { | |
581 | netif_carrier_on(bond->dev); | |
582 | return 1; | |
583 | } | |
584 | return 0; | |
585 | } | |
586 | } | |
587 | ||
588 | down: | |
589 | if (netif_carrier_ok(bond->dev)) { | |
590 | netif_carrier_off(bond->dev); | |
591 | return 1; | |
592 | } | |
593 | return 0; | |
594 | } | |
595 | ||
1da177e4 LT |
596 | /* |
597 | * Get link speed and duplex from the slave's base driver | |
598 | * using ethtool. If for some reason the call fails or the | |
599 | * values are invalid, fake speed and duplex to 100/Full | |
600 | * and return error. | |
601 | */ | |
602 | static int bond_update_speed_duplex(struct slave *slave) | |
603 | { | |
604 | struct net_device *slave_dev = slave->dev; | |
605 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
606 | struct ifreq ifr; | |
607 | struct ethtool_cmd etool; | |
608 | ||
609 | /* Fake speed and duplex */ | |
610 | slave->speed = SPEED_100; | |
611 | slave->duplex = DUPLEX_FULL; | |
612 | ||
613 | if (slave_dev->ethtool_ops) { | |
6a986ce4 | 614 | int res; |
1da177e4 LT |
615 | |
616 | if (!slave_dev->ethtool_ops->get_settings) { | |
617 | return -1; | |
618 | } | |
619 | ||
620 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); | |
621 | if (res < 0) { | |
622 | return -1; | |
623 | } | |
624 | ||
625 | goto verify; | |
626 | } | |
627 | ||
628 | ioctl = slave_dev->do_ioctl; | |
629 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
630 | etool.cmd = ETHTOOL_GSET; | |
631 | ifr.ifr_data = (char*)&etool; | |
632 | if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { | |
633 | return -1; | |
634 | } | |
635 | ||
636 | verify: | |
637 | switch (etool.speed) { | |
638 | case SPEED_10: | |
639 | case SPEED_100: | |
640 | case SPEED_1000: | |
641 | break; | |
642 | default: | |
643 | return -1; | |
644 | } | |
645 | ||
646 | switch (etool.duplex) { | |
647 | case DUPLEX_FULL: | |
648 | case DUPLEX_HALF: | |
649 | break; | |
650 | default: | |
651 | return -1; | |
652 | } | |
653 | ||
654 | slave->speed = etool.speed; | |
655 | slave->duplex = etool.duplex; | |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | /* | |
661 | * if <dev> supports MII link status reporting, check its link status. | |
662 | * | |
663 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
664 | * depening upon the setting of the use_carrier parameter. | |
665 | * | |
666 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
667 | * can't tell and just pretend it is), or 0, meaning that the link is | |
668 | * down. | |
669 | * | |
670 | * If reporting is non-zero, instead of faking link up, return -1 if | |
671 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
672 | * support them). If use_carrier is set, return whatever it says. | |
673 | * It'd be nice if there was a good way to tell if a driver supports | |
674 | * netif_carrier, but there really isn't. | |
675 | */ | |
676 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
677 | { | |
678 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
679 | struct ifreq ifr; | |
680 | struct mii_ioctl_data *mii; | |
681 | struct ethtool_value etool; | |
682 | ||
683 | if (bond->params.use_carrier) { | |
684 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
685 | } | |
686 | ||
687 | ioctl = slave_dev->do_ioctl; | |
688 | if (ioctl) { | |
689 | /* TODO: set pointer to correct ioctl on a per team member */ | |
690 | /* bases to make this more efficient. that is, once */ | |
691 | /* we determine the correct ioctl, we will always */ | |
692 | /* call it and not the others for that team */ | |
693 | /* member. */ | |
694 | ||
695 | /* | |
696 | * We cannot assume that SIOCGMIIPHY will also read a | |
697 | * register; not all network drivers (e.g., e100) | |
698 | * support that. | |
699 | */ | |
700 | ||
701 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
702 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
703 | mii = if_mii(&ifr); | |
704 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
705 | mii->reg_num = MII_BMSR; | |
706 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
707 | return (mii->val_out & BMSR_LSTATUS); | |
708 | } | |
709 | } | |
710 | } | |
711 | ||
712 | /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ | |
713 | /* for a period of time so we attempt to get link status */ | |
714 | /* from it last if the above MII ioctls fail... */ | |
715 | if (slave_dev->ethtool_ops) { | |
716 | if (slave_dev->ethtool_ops->get_link) { | |
717 | u32 link; | |
718 | ||
719 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
720 | ||
721 | return link ? BMSR_LSTATUS : 0; | |
722 | } | |
723 | } | |
724 | ||
725 | if (ioctl) { | |
726 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
727 | etool.cmd = ETHTOOL_GLINK; | |
728 | ifr.ifr_data = (char*)&etool; | |
729 | if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { | |
730 | if (etool.data == 1) { | |
731 | return BMSR_LSTATUS; | |
732 | } else { | |
733 | dprintk("SIOCETHTOOL shows link down\n"); | |
734 | return 0; | |
735 | } | |
736 | } | |
737 | } | |
738 | ||
739 | /* | |
740 | * If reporting, report that either there's no dev->do_ioctl, | |
741 | * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we | |
742 | * cannot report link status). If not reporting, pretend | |
743 | * we're ok. | |
744 | */ | |
745 | return (reporting ? -1 : BMSR_LSTATUS); | |
746 | } | |
747 | ||
748 | /*----------------------------- Multicast list ------------------------------*/ | |
749 | ||
750 | /* | |
751 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
752 | */ | |
753 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
754 | { | |
755 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
756 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
757 | } | |
758 | ||
759 | /* | |
760 | * returns dmi entry if found, NULL otherwise | |
761 | */ | |
762 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
763 | { | |
764 | struct dev_mc_list *idmi; | |
765 | ||
766 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
767 | if (bond_is_dmi_same(dmi, idmi)) { | |
768 | return idmi; | |
769 | } | |
770 | } | |
771 | ||
772 | return NULL; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Push the promiscuity flag down to appropriate slaves | |
777 | */ | |
778 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
779 | { | |
780 | if (USES_PRIMARY(bond->params.mode)) { | |
781 | /* write lock already acquired */ | |
782 | if (bond->curr_active_slave) { | |
783 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
784 | } | |
785 | } else { | |
786 | struct slave *slave; | |
787 | int i; | |
788 | bond_for_each_slave(bond, slave, i) { | |
789 | dev_set_promiscuity(slave->dev, inc); | |
790 | } | |
791 | } | |
792 | } | |
793 | ||
794 | /* | |
795 | * Push the allmulti flag down to all slaves | |
796 | */ | |
797 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
798 | { | |
799 | if (USES_PRIMARY(bond->params.mode)) { | |
800 | /* write lock already acquired */ | |
801 | if (bond->curr_active_slave) { | |
802 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
803 | } | |
804 | } else { | |
805 | struct slave *slave; | |
806 | int i; | |
807 | bond_for_each_slave(bond, slave, i) { | |
808 | dev_set_allmulti(slave->dev, inc); | |
809 | } | |
810 | } | |
811 | } | |
812 | ||
813 | /* | |
814 | * Add a Multicast address to slaves | |
815 | * according to mode | |
816 | */ | |
817 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
818 | { | |
819 | if (USES_PRIMARY(bond->params.mode)) { | |
820 | /* write lock already acquired */ | |
821 | if (bond->curr_active_slave) { | |
822 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
823 | } | |
824 | } else { | |
825 | struct slave *slave; | |
826 | int i; | |
827 | bond_for_each_slave(bond, slave, i) { | |
828 | dev_mc_add(slave->dev, addr, alen, 0); | |
829 | } | |
830 | } | |
831 | } | |
832 | ||
833 | /* | |
834 | * Remove a multicast address from slave | |
835 | * according to mode | |
836 | */ | |
837 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
838 | { | |
839 | if (USES_PRIMARY(bond->params.mode)) { | |
840 | /* write lock already acquired */ | |
841 | if (bond->curr_active_slave) { | |
842 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
843 | } | |
844 | } else { | |
845 | struct slave *slave; | |
846 | int i; | |
847 | bond_for_each_slave(bond, slave, i) { | |
848 | dev_mc_delete(slave->dev, addr, alen, 0); | |
849 | } | |
850 | } | |
851 | } | |
852 | ||
853 | /* | |
854 | * Totally destroys the mc_list in bond | |
855 | */ | |
856 | static void bond_mc_list_destroy(struct bonding *bond) | |
857 | { | |
858 | struct dev_mc_list *dmi; | |
859 | ||
860 | dmi = bond->mc_list; | |
861 | while (dmi) { | |
862 | bond->mc_list = dmi->next; | |
863 | kfree(dmi); | |
864 | dmi = bond->mc_list; | |
865 | } | |
866 | } | |
867 | ||
868 | /* | |
869 | * Copy all the Multicast addresses from src to the bonding device dst | |
870 | */ | |
de54f390 | 871 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 872 | gfp_t gfp_flag) |
1da177e4 LT |
873 | { |
874 | struct dev_mc_list *dmi, *new_dmi; | |
875 | ||
876 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 877 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
878 | |
879 | if (!new_dmi) { | |
880 | /* FIXME: Potential memory leak !!! */ | |
881 | return -ENOMEM; | |
882 | } | |
883 | ||
884 | new_dmi->next = bond->mc_list; | |
885 | bond->mc_list = new_dmi; | |
886 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
887 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
888 | new_dmi->dmi_users = dmi->dmi_users; | |
889 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
890 | } | |
891 | ||
892 | return 0; | |
893 | } | |
894 | ||
895 | /* | |
896 | * flush all members of flush->mc_list from device dev->mc_list | |
897 | */ | |
898 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
899 | { | |
900 | struct bonding *bond = bond_dev->priv; | |
901 | struct dev_mc_list *dmi; | |
902 | ||
903 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
904 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
905 | } | |
906 | ||
907 | if (bond->params.mode == BOND_MODE_8023AD) { | |
908 | /* del lacpdu mc addr from mc list */ | |
909 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
910 | ||
911 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
912 | } | |
913 | } | |
914 | ||
915 | /*--------------------------- Active slave change ---------------------------*/ | |
916 | ||
917 | /* | |
918 | * Update the mc list and multicast-related flags for the new and | |
919 | * old active slaves (if any) according to the multicast mode, and | |
920 | * promiscuous flags unconditionally. | |
921 | */ | |
922 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
923 | { | |
924 | struct dev_mc_list *dmi; | |
925 | ||
926 | if (!USES_PRIMARY(bond->params.mode)) { | |
927 | /* nothing to do - mc list is already up-to-date on | |
928 | * all slaves | |
929 | */ | |
930 | return; | |
931 | } | |
932 | ||
933 | if (old_active) { | |
934 | if (bond->dev->flags & IFF_PROMISC) { | |
935 | dev_set_promiscuity(old_active->dev, -1); | |
936 | } | |
937 | ||
938 | if (bond->dev->flags & IFF_ALLMULTI) { | |
939 | dev_set_allmulti(old_active->dev, -1); | |
940 | } | |
941 | ||
942 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
943 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
944 | } | |
945 | } | |
946 | ||
947 | if (new_active) { | |
948 | if (bond->dev->flags & IFF_PROMISC) { | |
949 | dev_set_promiscuity(new_active->dev, 1); | |
950 | } | |
951 | ||
952 | if (bond->dev->flags & IFF_ALLMULTI) { | |
953 | dev_set_allmulti(new_active->dev, 1); | |
954 | } | |
955 | ||
956 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
957 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
958 | } | |
959 | } | |
960 | } | |
961 | ||
962 | /** | |
963 | * find_best_interface - select the best available slave to be the active one | |
964 | * @bond: our bonding struct | |
965 | * | |
966 | * Warning: Caller must hold curr_slave_lock for writing. | |
967 | */ | |
968 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
969 | { | |
970 | struct slave *new_active, *old_active; | |
971 | struct slave *bestslave = NULL; | |
972 | int mintime = bond->params.updelay; | |
973 | int i; | |
974 | ||
975 | new_active = old_active = bond->curr_active_slave; | |
976 | ||
977 | if (!new_active) { /* there were no active slaves left */ | |
978 | if (bond->slave_cnt > 0) { /* found one slave */ | |
979 | new_active = bond->first_slave; | |
980 | } else { | |
981 | return NULL; /* still no slave, return NULL */ | |
982 | } | |
983 | } | |
984 | ||
985 | /* first try the primary link; if arping, a link must tx/rx traffic | |
986 | * before it can be considered the curr_active_slave - also, we would skip | |
987 | * slaves between the curr_active_slave and primary_slave that may be up | |
988 | * and able to arp | |
989 | */ | |
990 | if ((bond->primary_slave) && | |
991 | (!bond->params.arp_interval) && | |
992 | (IS_UP(bond->primary_slave->dev))) { | |
993 | new_active = bond->primary_slave; | |
994 | } | |
995 | ||
996 | /* remember where to stop iterating over the slaves */ | |
997 | old_active = new_active; | |
998 | ||
999 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1000 | if (IS_UP(new_active->dev)) { | |
1001 | if (new_active->link == BOND_LINK_UP) { | |
1002 | return new_active; | |
1003 | } else if (new_active->link == BOND_LINK_BACK) { | |
1004 | /* link up, but waiting for stabilization */ | |
1005 | if (new_active->delay < mintime) { | |
1006 | mintime = new_active->delay; | |
1007 | bestslave = new_active; | |
1008 | } | |
1009 | } | |
1010 | } | |
1011 | } | |
1012 | ||
1013 | return bestslave; | |
1014 | } | |
1015 | ||
1016 | /** | |
1017 | * change_active_interface - change the active slave into the specified one | |
1018 | * @bond: our bonding struct | |
1019 | * @new: the new slave to make the active one | |
1020 | * | |
1021 | * Set the new slave to the bond's settings and unset them on the old | |
1022 | * curr_active_slave. | |
1023 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1024 | * | |
1025 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1026 | * because it is apparently the best available slave we have, even though its | |
1027 | * updelay hasn't timed out yet. | |
1028 | * | |
1029 | * Warning: Caller must hold curr_slave_lock for writing. | |
1030 | */ | |
a77b5325 | 1031 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1032 | { |
1033 | struct slave *old_active = bond->curr_active_slave; | |
1034 | ||
1035 | if (old_active == new_active) { | |
1036 | return; | |
1037 | } | |
1038 | ||
1039 | if (new_active) { | |
1040 | if (new_active->link == BOND_LINK_BACK) { | |
1041 | if (USES_PRIMARY(bond->params.mode)) { | |
1042 | printk(KERN_INFO DRV_NAME | |
1043 | ": %s: making interface %s the new " | |
1044 | "active one %d ms earlier.\n", | |
1045 | bond->dev->name, new_active->dev->name, | |
1046 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1047 | } | |
1048 | ||
1049 | new_active->delay = 0; | |
1050 | new_active->link = BOND_LINK_UP; | |
1051 | new_active->jiffies = jiffies; | |
1052 | ||
1053 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1054 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1055 | } | |
1056 | ||
1057 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1058 | (bond->params.mode == BOND_MODE_ALB)) { | |
1059 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1060 | } | |
1061 | } else { | |
1062 | if (USES_PRIMARY(bond->params.mode)) { | |
1063 | printk(KERN_INFO DRV_NAME | |
1064 | ": %s: making interface %s the new " | |
1065 | "active one.\n", | |
1066 | bond->dev->name, new_active->dev->name); | |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
1da177e4 LT |
1071 | if (USES_PRIMARY(bond->params.mode)) { |
1072 | bond_mc_swap(bond, new_active, old_active); | |
1073 | } | |
1074 | ||
1075 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1076 | (bond->params.mode == BOND_MODE_ALB)) { | |
1077 | bond_alb_handle_active_change(bond, new_active); | |
8f903c70 JV |
1078 | if (old_active) |
1079 | bond_set_slave_inactive_flags(old_active); | |
1080 | if (new_active) | |
1081 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1082 | } else { |
1083 | bond->curr_active_slave = new_active; | |
1084 | } | |
c3ade5ca JV |
1085 | |
1086 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1087 | if (old_active) { | |
1088 | bond_set_slave_inactive_flags(old_active); | |
1089 | } | |
1090 | ||
1091 | if (new_active) { | |
1092 | bond_set_slave_active_flags(new_active); | |
1093 | } | |
1094 | bond_send_gratuitous_arp(bond); | |
1095 | } | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | /** | |
1099 | * bond_select_active_slave - select a new active slave, if needed | |
1100 | * @bond: our bonding struct | |
1101 | * | |
1102 | * This functions shoud be called when one of the following occurs: | |
1103 | * - The old curr_active_slave has been released or lost its link. | |
1104 | * - The primary_slave has got its link back. | |
1105 | * - A slave has got its link back and there's no old curr_active_slave. | |
1106 | * | |
1107 | * Warning: Caller must hold curr_slave_lock for writing. | |
1108 | */ | |
a77b5325 | 1109 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1110 | { |
1111 | struct slave *best_slave; | |
ff59c456 | 1112 | int rv; |
1da177e4 LT |
1113 | |
1114 | best_slave = bond_find_best_slave(bond); | |
1115 | if (best_slave != bond->curr_active_slave) { | |
1116 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1117 | rv = bond_set_carrier(bond); |
1118 | if (!rv) | |
1119 | return; | |
1120 | ||
1121 | if (netif_carrier_ok(bond->dev)) { | |
1122 | printk(KERN_INFO DRV_NAME | |
1123 | ": %s: first active interface up!\n", | |
1124 | bond->dev->name); | |
1125 | } else { | |
1126 | printk(KERN_INFO DRV_NAME ": %s: " | |
1127 | "now running without any active interface !\n", | |
1128 | bond->dev->name); | |
1129 | } | |
1da177e4 LT |
1130 | } |
1131 | } | |
1132 | ||
1133 | /*--------------------------- slave list handling ---------------------------*/ | |
1134 | ||
1135 | /* | |
1136 | * This function attaches the slave to the end of list. | |
1137 | * | |
1138 | * bond->lock held for writing by caller. | |
1139 | */ | |
1140 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1141 | { | |
1142 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1143 | new_slave->next = new_slave; | |
1144 | new_slave->prev = new_slave; | |
1145 | bond->first_slave = new_slave; | |
1146 | } else { | |
1147 | new_slave->next = bond->first_slave; | |
1148 | new_slave->prev = bond->first_slave->prev; | |
1149 | new_slave->next->prev = new_slave; | |
1150 | new_slave->prev->next = new_slave; | |
1151 | } | |
1152 | ||
1153 | bond->slave_cnt++; | |
1154 | } | |
1155 | ||
1156 | /* | |
1157 | * This function detaches the slave from the list. | |
1158 | * WARNING: no check is made to verify if the slave effectively | |
1159 | * belongs to <bond>. | |
1160 | * Nothing is freed on return, structures are just unchained. | |
1161 | * If any slave pointer in bond was pointing to <slave>, | |
1162 | * it should be changed by the calling function. | |
1163 | * | |
1164 | * bond->lock held for writing by caller. | |
1165 | */ | |
1166 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1167 | { | |
1168 | if (slave->next) { | |
1169 | slave->next->prev = slave->prev; | |
1170 | } | |
1171 | ||
1172 | if (slave->prev) { | |
1173 | slave->prev->next = slave->next; | |
1174 | } | |
1175 | ||
1176 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1177 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1178 | bond->first_slave = slave->next; | |
1179 | } else { | |
1180 | bond->first_slave = NULL; /* slave was the last one */ | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | slave->next = NULL; | |
1185 | slave->prev = NULL; | |
1186 | bond->slave_cnt--; | |
1187 | } | |
1188 | ||
1189 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1190 | ||
a77b5325 | 1191 | int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1192 | { |
1193 | dprintk("bond_dev=%p\n", bond_dev); | |
1194 | dprintk("slave_dev=%p\n", slave_dev); | |
1195 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1196 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1197 | return 0; | |
1198 | } | |
1199 | ||
8531c5ff | 1200 | #define BOND_INTERSECT_FEATURES \ |
8648b305 | 1201 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_TSO | NETIF_F_UFO) |
8531c5ff AK |
1202 | |
1203 | /* | |
8e3babcd JV |
1204 | * Compute the common dev->feature set available to all slaves. Some |
1205 | * feature bits are managed elsewhere, so preserve feature bits set on | |
1206 | * master device that are not part of the examined set. | |
8531c5ff AK |
1207 | */ |
1208 | static int bond_compute_features(struct bonding *bond) | |
1209 | { | |
8e3babcd | 1210 | unsigned long features = BOND_INTERSECT_FEATURES; |
8531c5ff AK |
1211 | struct slave *slave; |
1212 | struct net_device *bond_dev = bond->dev; | |
8e3babcd | 1213 | int i; |
8531c5ff | 1214 | |
8e3babcd JV |
1215 | bond_for_each_slave(bond, slave, i) |
1216 | features &= (slave->dev->features & BOND_INTERSECT_FEATURES); | |
8531c5ff | 1217 | |
8531c5ff | 1218 | if ((features & NETIF_F_SG) && |
8648b305 | 1219 | !(features & NETIF_F_ALL_CSUM)) |
8531c5ff | 1220 | features &= ~NETIF_F_SG; |
8531c5ff | 1221 | |
a0de3adf JV |
1222 | /* |
1223 | * features will include NETIF_F_TSO (NETIF_F_UFO) iff all | |
1224 | * slave devices support NETIF_F_TSO (NETIF_F_UFO), which | |
1225 | * implies that all slaves also support scatter-gather | |
1226 | * (NETIF_F_SG), which implies that features also includes | |
1227 | * NETIF_F_SG. So no need to check whether we have an | |
1228 | * illegal combination of NETIF_F_{TSO,UFO} and | |
1229 | * !NETIF_F_SG | |
1230 | */ | |
1231 | ||
8e3babcd | 1232 | features |= (bond_dev->features & ~BOND_INTERSECT_FEATURES); |
8531c5ff AK |
1233 | bond_dev->features = features; |
1234 | ||
1235 | return 0; | |
1236 | } | |
1237 | ||
1da177e4 | 1238 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1239 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1240 | { |
1241 | struct bonding *bond = bond_dev->priv; | |
1242 | struct slave *new_slave = NULL; | |
1243 | struct dev_mc_list *dmi; | |
1244 | struct sockaddr addr; | |
1245 | int link_reporting; | |
1246 | int old_features = bond_dev->features; | |
1247 | int res = 0; | |
1248 | ||
552709d5 | 1249 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
1250 | slave_dev->do_ioctl == NULL) { | |
1da177e4 | 1251 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1252 | ": %s: Warning: no link monitoring support for %s\n", |
1253 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1254 | } |
1255 | ||
1256 | /* bond must be initialized by bond_open() before enslaving */ | |
1257 | if (!(bond_dev->flags & IFF_UP)) { | |
1258 | dprintk("Error, master_dev is not up\n"); | |
1259 | return -EPERM; | |
1260 | } | |
1261 | ||
1262 | /* already enslaved */ | |
1263 | if (slave_dev->flags & IFF_SLAVE) { | |
1264 | dprintk("Error, Device was already enslaved\n"); | |
1265 | return -EBUSY; | |
1266 | } | |
1267 | ||
1268 | /* vlan challenged mutual exclusion */ | |
1269 | /* no need to lock since we're protected by rtnl_lock */ | |
1270 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1271 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1272 | if (!list_empty(&bond->vlan_list)) { | |
1273 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1274 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1275 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1276 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1277 | bond_dev->name); |
1278 | return -EPERM; | |
1279 | } else { | |
1280 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1281 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1282 | "slave %s. Adding VLANs will be blocked as " |
1283 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1284 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1285 | bond_dev->name); |
1286 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1287 | } | |
1288 | } else { | |
1289 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1290 | if (bond->slave_cnt == 0) { | |
1291 | /* First slave, and it is not VLAN challenged, | |
1292 | * so remove the block of adding VLANs over the bond. | |
1293 | */ | |
1294 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1295 | } | |
1296 | } | |
1297 | ||
217df670 JV |
1298 | /* |
1299 | * Old ifenslave binaries are no longer supported. These can | |
1300 | * be identified with moderate accurary by the state of the slave: | |
1301 | * the current ifenslave will set the interface down prior to | |
1302 | * enslaving it; the old ifenslave will not. | |
1303 | */ | |
1304 | if ((slave_dev->flags & IFF_UP)) { | |
1305 | printk(KERN_ERR DRV_NAME ": %s is up. " | |
1306 | "This may be due to an out of date ifenslave.\n", | |
1307 | slave_dev->name); | |
1308 | res = -EPERM; | |
1309 | goto err_undo_flags; | |
1310 | } | |
1da177e4 | 1311 | |
217df670 JV |
1312 | if (slave_dev->set_mac_address == NULL) { |
1313 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
1314 | ": %s: Error: The slave device you specified does " |
1315 | "not support setting the MAC address. " | |
1316 | "Your kernel likely does not support slave " | |
1317 | "devices.\n", bond_dev->name); | |
1318 | res = -EOPNOTSUPP; | |
217df670 | 1319 | goto err_undo_flags; |
1da177e4 LT |
1320 | } |
1321 | ||
1322 | new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); | |
1323 | if (!new_slave) { | |
1324 | res = -ENOMEM; | |
1325 | goto err_undo_flags; | |
1326 | } | |
1327 | ||
1328 | memset(new_slave, 0, sizeof(struct slave)); | |
1329 | ||
1330 | /* save slave's original flags before calling | |
1331 | * netdev_set_master and dev_open | |
1332 | */ | |
1333 | new_slave->original_flags = slave_dev->flags; | |
1334 | ||
217df670 JV |
1335 | /* |
1336 | * Save slave's original ("permanent") mac address for modes | |
1337 | * that need it, and for restoring it upon release, and then | |
1338 | * set it to the master's address | |
1339 | */ | |
1340 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1341 | |
217df670 JV |
1342 | /* |
1343 | * Set slave to master's mac address. The application already | |
1344 | * set the master's mac address to that of the first slave | |
1345 | */ | |
1346 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1347 | addr.sa_family = slave_dev->type; | |
1348 | res = dev_set_mac_address(slave_dev, &addr); | |
1349 | if (res) { | |
1350 | dprintk("Error %d calling set_mac_address\n", res); | |
1351 | goto err_free; | |
1352 | } | |
1da177e4 | 1353 | |
217df670 JV |
1354 | /* open the slave since the application closed it */ |
1355 | res = dev_open(slave_dev); | |
1356 | if (res) { | |
1357 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
1358 | goto err_restore_mac; | |
1da177e4 LT |
1359 | } |
1360 | ||
1361 | res = netdev_set_master(slave_dev, bond_dev); | |
1362 | if (res) { | |
1363 | dprintk("Error %d calling netdev_set_master\n", res); | |
217df670 | 1364 | goto err_close; |
1da177e4 LT |
1365 | } |
1366 | ||
1367 | new_slave->dev = slave_dev; | |
1368 | ||
1369 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1370 | (bond->params.mode == BOND_MODE_ALB)) { | |
1371 | /* bond_alb_init_slave() must be called before all other stages since | |
1372 | * it might fail and we do not want to have to undo everything | |
1373 | */ | |
1374 | res = bond_alb_init_slave(bond, new_slave); | |
1375 | if (res) { | |
1376 | goto err_unset_master; | |
1377 | } | |
1378 | } | |
1379 | ||
1380 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1381 | * master's promisc (and mc) settings only if it becomes the | |
1382 | * curr_active_slave, and that is taken care of later when calling | |
1383 | * bond_change_active() | |
1384 | */ | |
1385 | if (!USES_PRIMARY(bond->params.mode)) { | |
1386 | /* set promiscuity level to new slave */ | |
1387 | if (bond_dev->flags & IFF_PROMISC) { | |
1388 | dev_set_promiscuity(slave_dev, 1); | |
1389 | } | |
1390 | ||
1391 | /* set allmulti level to new slave */ | |
1392 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1393 | dev_set_allmulti(slave_dev, 1); | |
1394 | } | |
1395 | ||
1396 | /* upload master's mc_list to new slave */ | |
1397 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1398 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1399 | } | |
1400 | } | |
1401 | ||
1402 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1403 | /* add lacpdu mc addr to mc list */ | |
1404 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1405 | ||
1406 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1407 | } | |
1408 | ||
1409 | bond_add_vlans_on_slave(bond, slave_dev); | |
1410 | ||
1411 | write_lock_bh(&bond->lock); | |
1412 | ||
1413 | bond_attach_slave(bond, new_slave); | |
1414 | ||
1415 | new_slave->delay = 0; | |
1416 | new_slave->link_failure_count = 0; | |
1417 | ||
8531c5ff AK |
1418 | bond_compute_features(bond); |
1419 | ||
1da177e4 LT |
1420 | if (bond->params.miimon && !bond->params.use_carrier) { |
1421 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1422 | ||
1423 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1424 | /* | |
1425 | * miimon is set but a bonded network driver | |
1426 | * does not support ETHTOOL/MII and | |
1427 | * arp_interval is not set. Note: if | |
1428 | * use_carrier is enabled, we will never go | |
1429 | * here (because netif_carrier is always | |
1430 | * supported); thus, we don't need to change | |
1431 | * the messages for netif_carrier. | |
1432 | */ | |
1433 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1434 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1435 | "available for interface %s, and " |
1436 | "arp_interval/arp_ip_target module parameters " | |
1437 | "not specified, thus bonding will not detect " | |
1438 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1439 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1440 | } else if (link_reporting == -1) { |
1441 | /* unable get link status using mii/ethtool */ | |
1442 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1443 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1444 | "interface %s; the network driver associated " |
1445 | "with this interface does not support MII or " | |
1446 | "ETHTOOL link status reporting, thus miimon " | |
1447 | "has no effect on this interface.\n", | |
4e0952c7 | 1448 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1449 | } |
1450 | } | |
1451 | ||
1452 | /* check for initial state */ | |
1453 | if (!bond->params.miimon || | |
1454 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1455 | if (bond->params.updelay) { | |
1456 | dprintk("Initial state of slave_dev is " | |
1457 | "BOND_LINK_BACK\n"); | |
1458 | new_slave->link = BOND_LINK_BACK; | |
1459 | new_slave->delay = bond->params.updelay; | |
1460 | } else { | |
1461 | dprintk("Initial state of slave_dev is " | |
1462 | "BOND_LINK_UP\n"); | |
1463 | new_slave->link = BOND_LINK_UP; | |
1464 | } | |
1465 | new_slave->jiffies = jiffies; | |
1466 | } else { | |
1467 | dprintk("Initial state of slave_dev is " | |
1468 | "BOND_LINK_DOWN\n"); | |
1469 | new_slave->link = BOND_LINK_DOWN; | |
1470 | } | |
1471 | ||
1472 | if (bond_update_speed_duplex(new_slave) && | |
1473 | (new_slave->link != BOND_LINK_DOWN)) { | |
1474 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1475 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1476 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1477 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1478 | |
1479 | if (bond->params.mode == BOND_MODE_8023AD) { | |
4e0952c7 MW |
1480 | printk(KERN_WARNING DRV_NAME |
1481 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " | |
1da177e4 | 1482 | "support in base driver for proper aggregator " |
4e0952c7 | 1483 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1484 | } |
1485 | } | |
1486 | ||
1487 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1488 | /* if there is a primary slave, remember it */ | |
1489 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1490 | bond->primary_slave = new_slave; | |
1491 | } | |
1492 | } | |
1493 | ||
1494 | switch (bond->params.mode) { | |
1495 | case BOND_MODE_ACTIVEBACKUP: | |
8f903c70 JV |
1496 | /* if we're in active-backup mode, we need one and |
1497 | * only one active interface. The backup interfaces | |
1498 | * will have their SLAVE_INACTIVE flag set because we | |
1499 | * need them to be drop all packets. Thus, since we | |
1500 | * guarantee that curr_active_slave always point to | |
1501 | * the last usable interface, we just have to verify | |
1502 | * this interface's flag. | |
1da177e4 LT |
1503 | */ |
1504 | if (((!bond->curr_active_slave) || | |
8f903c70 | 1505 | (bond->curr_active_slave->dev->priv_flags & IFF_SLAVE_INACTIVE)) && |
1da177e4 | 1506 | (new_slave->link != BOND_LINK_DOWN)) { |
1da177e4 LT |
1507 | /* first slave or no active slave yet, and this link |
1508 | is OK, so make this interface the active one */ | |
1509 | bond_change_active_slave(bond, new_slave); | |
ff59c456 JV |
1510 | printk(KERN_INFO DRV_NAME |
1511 | ": %s: first active interface up!\n", | |
1512 | bond->dev->name); | |
1513 | netif_carrier_on(bond->dev); | |
1514 | ||
1da177e4 LT |
1515 | } else { |
1516 | dprintk("This is just a backup slave\n"); | |
1517 | bond_set_slave_inactive_flags(new_slave); | |
1518 | } | |
1519 | break; | |
1520 | case BOND_MODE_8023AD: | |
1521 | /* in 802.3ad mode, the internal mechanism | |
1522 | * will activate the slaves in the selected | |
1523 | * aggregator | |
1524 | */ | |
1525 | bond_set_slave_inactive_flags(new_slave); | |
1526 | /* if this is the first slave */ | |
1527 | if (bond->slave_cnt == 1) { | |
1528 | SLAVE_AD_INFO(new_slave).id = 1; | |
1529 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1530 | * can be called only after the mac address of the bond is set | |
1531 | */ | |
1532 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1533 | bond->params.lacp_fast); | |
1534 | } else { | |
1535 | SLAVE_AD_INFO(new_slave).id = | |
1536 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1537 | } | |
1538 | ||
1539 | bond_3ad_bind_slave(new_slave); | |
1540 | break; | |
1541 | case BOND_MODE_TLB: | |
1542 | case BOND_MODE_ALB: | |
1543 | new_slave->state = BOND_STATE_ACTIVE; | |
1544 | if ((!bond->curr_active_slave) && | |
1545 | (new_slave->link != BOND_LINK_DOWN)) { | |
1546 | /* first slave or no active slave yet, and this link | |
1547 | * is OK, so make this interface the active one | |
1548 | */ | |
1549 | bond_change_active_slave(bond, new_slave); | |
8f903c70 JV |
1550 | } else { |
1551 | bond_set_slave_inactive_flags(new_slave); | |
1da177e4 LT |
1552 | } |
1553 | break; | |
1554 | default: | |
1555 | dprintk("This slave is always active in trunk mode\n"); | |
1556 | ||
1557 | /* always active in trunk mode */ | |
1558 | new_slave->state = BOND_STATE_ACTIVE; | |
1559 | ||
1560 | /* In trunking mode there is little meaning to curr_active_slave | |
1561 | * anyway (it holds no special properties of the bond device), | |
1562 | * so we can change it without calling change_active_interface() | |
1563 | */ | |
1564 | if (!bond->curr_active_slave) { | |
1565 | bond->curr_active_slave = new_slave; | |
1566 | } | |
1567 | break; | |
1568 | } /* switch(bond_mode) */ | |
1569 | ||
ff59c456 JV |
1570 | bond_set_carrier(bond); |
1571 | ||
1da177e4 LT |
1572 | write_unlock_bh(&bond->lock); |
1573 | ||
b76cdba9 MW |
1574 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1575 | if (res) | |
1576 | goto err_unset_master; | |
1577 | ||
1da177e4 LT |
1578 | printk(KERN_INFO DRV_NAME |
1579 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1580 | bond_dev->name, slave_dev->name, | |
1581 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1582 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1583 | ||
1584 | /* enslave is successful */ | |
1585 | return 0; | |
1586 | ||
1587 | /* Undo stages on error */ | |
1588 | err_unset_master: | |
1589 | netdev_set_master(slave_dev, NULL); | |
1590 | ||
1591 | err_close: | |
1592 | dev_close(slave_dev); | |
1593 | ||
1594 | err_restore_mac: | |
1595 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); | |
1596 | addr.sa_family = slave_dev->type; | |
1597 | dev_set_mac_address(slave_dev, &addr); | |
1598 | ||
1599 | err_free: | |
1600 | kfree(new_slave); | |
1601 | ||
1602 | err_undo_flags: | |
1603 | bond_dev->features = old_features; | |
8531c5ff | 1604 | |
1da177e4 LT |
1605 | return res; |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | * Try to release the slave device <slave> from the bond device <master> | |
1610 | * It is legal to access curr_active_slave without a lock because all the function | |
1611 | * is write-locked. | |
1612 | * | |
1613 | * The rules for slave state should be: | |
1614 | * for Active/Backup: | |
1615 | * Active stays on all backups go down | |
1616 | * for Bonded connections: | |
1617 | * The first up interface should be left on and all others downed. | |
1618 | */ | |
a77b5325 | 1619 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1620 | { |
1621 | struct bonding *bond = bond_dev->priv; | |
1622 | struct slave *slave, *oldcurrent; | |
1623 | struct sockaddr addr; | |
1624 | int mac_addr_differ; | |
1625 | ||
1626 | /* slave is not a slave or master is not master of this slave */ | |
1627 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1628 | (slave_dev->master != bond_dev)) { | |
1629 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1630 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
1631 | bond_dev->name, slave_dev->name); |
1632 | return -EINVAL; | |
1633 | } | |
1634 | ||
1635 | write_lock_bh(&bond->lock); | |
1636 | ||
1637 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1638 | if (!slave) { | |
1639 | /* not a slave of this bond */ | |
1640 | printk(KERN_INFO DRV_NAME | |
1641 | ": %s: %s not enslaved\n", | |
1642 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1643 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1644 | return -EINVAL; |
1645 | } | |
1646 | ||
1647 | mac_addr_differ = memcmp(bond_dev->dev_addr, | |
1648 | slave->perm_hwaddr, | |
1649 | ETH_ALEN); | |
1650 | if (!mac_addr_differ && (bond->slave_cnt > 1)) { | |
1651 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1652 | ": %s: Warning: the permanent HWaddr of %s " |
1da177e4 LT |
1653 | "- %02X:%02X:%02X:%02X:%02X:%02X - is " |
1654 | "still in use by %s. Set the HWaddr of " | |
1655 | "%s to a different address to avoid " | |
1656 | "conflicts.\n", | |
4e0952c7 | 1657 | bond_dev->name, |
1da177e4 LT |
1658 | slave_dev->name, |
1659 | slave->perm_hwaddr[0], | |
1660 | slave->perm_hwaddr[1], | |
1661 | slave->perm_hwaddr[2], | |
1662 | slave->perm_hwaddr[3], | |
1663 | slave->perm_hwaddr[4], | |
1664 | slave->perm_hwaddr[5], | |
1665 | bond_dev->name, | |
1666 | slave_dev->name); | |
1667 | } | |
1668 | ||
1669 | /* Inform AD package of unbinding of slave. */ | |
1670 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1671 | /* must be called before the slave is | |
1672 | * detached from the list | |
1673 | */ | |
1674 | bond_3ad_unbind_slave(slave); | |
1675 | } | |
1676 | ||
1677 | printk(KERN_INFO DRV_NAME | |
1678 | ": %s: releasing %s interface %s\n", | |
1679 | bond_dev->name, | |
1680 | (slave->state == BOND_STATE_ACTIVE) | |
1681 | ? "active" : "backup", | |
1682 | slave_dev->name); | |
1683 | ||
1684 | oldcurrent = bond->curr_active_slave; | |
1685 | ||
1686 | bond->current_arp_slave = NULL; | |
1687 | ||
1688 | /* release the slave from its bond */ | |
1689 | bond_detach_slave(bond, slave); | |
1690 | ||
8531c5ff AK |
1691 | bond_compute_features(bond); |
1692 | ||
1da177e4 LT |
1693 | if (bond->primary_slave == slave) { |
1694 | bond->primary_slave = NULL; | |
1695 | } | |
1696 | ||
1697 | if (oldcurrent == slave) { | |
1698 | bond_change_active_slave(bond, NULL); | |
1699 | } | |
1700 | ||
1701 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1702 | (bond->params.mode == BOND_MODE_ALB)) { | |
1703 | /* Must be called only after the slave has been | |
1704 | * detached from the list and the curr_active_slave | |
1705 | * has been cleared (if our_slave == old_current), | |
1706 | * but before a new active slave is selected. | |
1707 | */ | |
1708 | bond_alb_deinit_slave(bond, slave); | |
1709 | } | |
1710 | ||
ff59c456 | 1711 | if (oldcurrent == slave) |
1da177e4 LT |
1712 | bond_select_active_slave(bond); |
1713 | ||
1da177e4 | 1714 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1715 | bond_set_carrier(bond); |
1716 | ||
1da177e4 LT |
1717 | /* if the last slave was removed, zero the mac address |
1718 | * of the master so it will be set by the application | |
1719 | * to the mac address of the first slave | |
1720 | */ | |
1721 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1722 | ||
1723 | if (list_empty(&bond->vlan_list)) { | |
1724 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1725 | } else { | |
1726 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1727 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1728 | "still has VLANs.\n", |
4e0952c7 | 1729 | bond_dev->name, bond_dev->name); |
1da177e4 | 1730 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1731 | ": %s: When re-adding slaves, make sure the bond's " |
1732 | "HW address matches its VLANs'.\n", | |
1733 | bond_dev->name); | |
1da177e4 LT |
1734 | } |
1735 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1736 | !bond_has_challenged_slaves(bond)) { | |
1737 | printk(KERN_INFO DRV_NAME | |
4e0952c7 | 1738 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 1739 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 1740 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
1741 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1742 | } | |
1743 | ||
1744 | write_unlock_bh(&bond->lock); | |
1745 | ||
b76cdba9 MW |
1746 | /* must do this from outside any spinlocks */ |
1747 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1748 | ||
1da177e4 LT |
1749 | bond_del_vlans_from_slave(bond, slave_dev); |
1750 | ||
1751 | /* If the mode USES_PRIMARY, then we should only remove its | |
1752 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1753 | * already taken care of above when we detached the slave | |
1754 | */ | |
1755 | if (!USES_PRIMARY(bond->params.mode)) { | |
1756 | /* unset promiscuity level from slave */ | |
1757 | if (bond_dev->flags & IFF_PROMISC) { | |
1758 | dev_set_promiscuity(slave_dev, -1); | |
1759 | } | |
1760 | ||
1761 | /* unset allmulti level from slave */ | |
1762 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1763 | dev_set_allmulti(slave_dev, -1); | |
1764 | } | |
1765 | ||
1766 | /* flush master's mc_list from slave */ | |
1767 | bond_mc_list_flush(bond_dev, slave_dev); | |
1768 | } | |
1769 | ||
1770 | netdev_set_master(slave_dev, NULL); | |
1771 | ||
1772 | /* close slave before restoring its mac address */ | |
1773 | dev_close(slave_dev); | |
1774 | ||
217df670 JV |
1775 | /* restore original ("permanent") mac address */ |
1776 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1777 | addr.sa_family = slave_dev->type; | |
1778 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 | 1779 | |
8f903c70 JV |
1780 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
1781 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
1782 | |
1783 | kfree(slave); | |
1784 | ||
1785 | return 0; /* deletion OK */ | |
1786 | } | |
1787 | ||
1788 | /* | |
1789 | * This function releases all slaves. | |
1790 | */ | |
1791 | static int bond_release_all(struct net_device *bond_dev) | |
1792 | { | |
1793 | struct bonding *bond = bond_dev->priv; | |
1794 | struct slave *slave; | |
1795 | struct net_device *slave_dev; | |
1796 | struct sockaddr addr; | |
1797 | ||
1798 | write_lock_bh(&bond->lock); | |
1799 | ||
ff59c456 JV |
1800 | netif_carrier_off(bond_dev); |
1801 | ||
1da177e4 LT |
1802 | if (bond->slave_cnt == 0) { |
1803 | goto out; | |
1804 | } | |
1805 | ||
1806 | bond->current_arp_slave = NULL; | |
1807 | bond->primary_slave = NULL; | |
1808 | bond_change_active_slave(bond, NULL); | |
1809 | ||
1810 | while ((slave = bond->first_slave) != NULL) { | |
1811 | /* Inform AD package of unbinding of slave | |
1812 | * before slave is detached from the list. | |
1813 | */ | |
1814 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1815 | bond_3ad_unbind_slave(slave); | |
1816 | } | |
1817 | ||
1818 | slave_dev = slave->dev; | |
1819 | bond_detach_slave(bond, slave); | |
1820 | ||
1821 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1822 | (bond->params.mode == BOND_MODE_ALB)) { | |
1823 | /* must be called only after the slave | |
1824 | * has been detached from the list | |
1825 | */ | |
1826 | bond_alb_deinit_slave(bond, slave); | |
1827 | } | |
1828 | ||
8531c5ff AK |
1829 | bond_compute_features(bond); |
1830 | ||
1da177e4 LT |
1831 | /* now that the slave is detached, unlock and perform |
1832 | * all the undo steps that should not be called from | |
1833 | * within a lock. | |
1834 | */ | |
1835 | write_unlock_bh(&bond->lock); | |
1836 | ||
b76cdba9 | 1837 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
1838 | bond_del_vlans_from_slave(bond, slave_dev); |
1839 | ||
1840 | /* If the mode USES_PRIMARY, then we should only remove its | |
1841 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1842 | * already taken care of above when we detached the slave | |
1843 | */ | |
1844 | if (!USES_PRIMARY(bond->params.mode)) { | |
1845 | /* unset promiscuity level from slave */ | |
1846 | if (bond_dev->flags & IFF_PROMISC) { | |
1847 | dev_set_promiscuity(slave_dev, -1); | |
1848 | } | |
1849 | ||
1850 | /* unset allmulti level from slave */ | |
1851 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1852 | dev_set_allmulti(slave_dev, -1); | |
1853 | } | |
1854 | ||
1855 | /* flush master's mc_list from slave */ | |
1856 | bond_mc_list_flush(bond_dev, slave_dev); | |
1857 | } | |
1858 | ||
1859 | netdev_set_master(slave_dev, NULL); | |
1860 | ||
1861 | /* close slave before restoring its mac address */ | |
1862 | dev_close(slave_dev); | |
1863 | ||
217df670 JV |
1864 | /* restore original ("permanent") mac address*/ |
1865 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1866 | addr.sa_family = slave_dev->type; | |
1867 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 | 1868 | |
8f903c70 JV |
1869 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
1870 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
1871 | |
1872 | kfree(slave); | |
1873 | ||
1874 | /* re-acquire the lock before getting the next slave */ | |
1875 | write_lock_bh(&bond->lock); | |
1876 | } | |
1877 | ||
1878 | /* zero the mac address of the master so it will be | |
1879 | * set by the application to the mac address of the | |
1880 | * first slave | |
1881 | */ | |
1882 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1883 | ||
1884 | if (list_empty(&bond->vlan_list)) { | |
1885 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1886 | } else { | |
1887 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1888 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1889 | "still has VLANs.\n", |
4e0952c7 | 1890 | bond_dev->name, bond_dev->name); |
1da177e4 | 1891 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1892 | ": %s: When re-adding slaves, make sure the bond's " |
1893 | "HW address matches its VLANs'.\n", | |
1894 | bond_dev->name); | |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | printk(KERN_INFO DRV_NAME | |
1898 | ": %s: released all slaves\n", | |
1899 | bond_dev->name); | |
1900 | ||
1901 | out: | |
1902 | write_unlock_bh(&bond->lock); | |
1903 | ||
1904 | return 0; | |
1905 | } | |
1906 | ||
1907 | /* | |
1908 | * This function changes the active slave to slave <slave_dev>. | |
1909 | * It returns -EINVAL in the following cases. | |
1910 | * - <slave_dev> is not found in the list. | |
1911 | * - There is not active slave now. | |
1912 | * - <slave_dev> is already active. | |
1913 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
1914 | * - <slave_dev> is not running. | |
1915 | * In these cases, this fuction does nothing. | |
1916 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
1917 | */ | |
1918 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
1919 | { | |
1920 | struct bonding *bond = bond_dev->priv; | |
1921 | struct slave *old_active = NULL; | |
1922 | struct slave *new_active = NULL; | |
1923 | int res = 0; | |
1924 | ||
1925 | if (!USES_PRIMARY(bond->params.mode)) { | |
1926 | return -EINVAL; | |
1927 | } | |
1928 | ||
1929 | /* Verify that master_dev is indeed the master of slave_dev */ | |
1930 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1931 | (slave_dev->master != bond_dev)) { | |
1932 | return -EINVAL; | |
1933 | } | |
1934 | ||
1935 | write_lock_bh(&bond->lock); | |
1936 | ||
1937 | old_active = bond->curr_active_slave; | |
1938 | new_active = bond_get_slave_by_dev(bond, slave_dev); | |
1939 | ||
1940 | /* | |
1941 | * Changing to the current active: do nothing; return success. | |
1942 | */ | |
1943 | if (new_active && (new_active == old_active)) { | |
1944 | write_unlock_bh(&bond->lock); | |
1945 | return 0; | |
1946 | } | |
1947 | ||
1948 | if ((new_active) && | |
1949 | (old_active) && | |
1950 | (new_active->link == BOND_LINK_UP) && | |
1951 | IS_UP(new_active->dev)) { | |
1952 | bond_change_active_slave(bond, new_active); | |
1953 | } else { | |
1954 | res = -EINVAL; | |
1955 | } | |
1956 | ||
1957 | write_unlock_bh(&bond->lock); | |
1958 | ||
1959 | return res; | |
1960 | } | |
1961 | ||
1da177e4 LT |
1962 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
1963 | { | |
1964 | struct bonding *bond = bond_dev->priv; | |
1965 | ||
1966 | info->bond_mode = bond->params.mode; | |
1967 | info->miimon = bond->params.miimon; | |
1968 | ||
1969 | read_lock_bh(&bond->lock); | |
1970 | info->num_slaves = bond->slave_cnt; | |
1971 | read_unlock_bh(&bond->lock); | |
1972 | ||
1973 | return 0; | |
1974 | } | |
1975 | ||
1976 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
1977 | { | |
1978 | struct bonding *bond = bond_dev->priv; | |
1979 | struct slave *slave; | |
1980 | int i, found = 0; | |
1981 | ||
1982 | if (info->slave_id < 0) { | |
1983 | return -ENODEV; | |
1984 | } | |
1985 | ||
1986 | read_lock_bh(&bond->lock); | |
1987 | ||
1988 | bond_for_each_slave(bond, slave, i) { | |
1989 | if (i == (int)info->slave_id) { | |
1990 | found = 1; | |
1991 | break; | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | read_unlock_bh(&bond->lock); | |
1996 | ||
1997 | if (found) { | |
1998 | strcpy(info->slave_name, slave->dev->name); | |
1999 | info->link = slave->link; | |
2000 | info->state = slave->state; | |
2001 | info->link_failure_count = slave->link_failure_count; | |
2002 | } else { | |
2003 | return -ENODEV; | |
2004 | } | |
2005 | ||
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | /*-------------------------------- Monitoring -------------------------------*/ | |
2010 | ||
2011 | /* this function is called regularly to monitor each slave's link. */ | |
a77b5325 | 2012 | void bond_mii_monitor(struct net_device *bond_dev) |
1da177e4 LT |
2013 | { |
2014 | struct bonding *bond = bond_dev->priv; | |
2015 | struct slave *slave, *oldcurrent; | |
2016 | int do_failover = 0; | |
2017 | int delta_in_ticks; | |
2018 | int i; | |
2019 | ||
2020 | read_lock(&bond->lock); | |
2021 | ||
2022 | delta_in_ticks = (bond->params.miimon * HZ) / 1000; | |
2023 | ||
2024 | if (bond->kill_timers) { | |
2025 | goto out; | |
2026 | } | |
2027 | ||
2028 | if (bond->slave_cnt == 0) { | |
2029 | goto re_arm; | |
2030 | } | |
2031 | ||
2032 | /* we will try to read the link status of each of our slaves, and | |
2033 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2034 | * supporting MII status, we won't do anything so that a user-space | |
2035 | * program could monitor the link itself if needed. | |
2036 | */ | |
2037 | ||
2038 | read_lock(&bond->curr_slave_lock); | |
2039 | oldcurrent = bond->curr_active_slave; | |
2040 | read_unlock(&bond->curr_slave_lock); | |
2041 | ||
2042 | bond_for_each_slave(bond, slave, i) { | |
2043 | struct net_device *slave_dev = slave->dev; | |
2044 | int link_state; | |
2045 | u16 old_speed = slave->speed; | |
2046 | u8 old_duplex = slave->duplex; | |
2047 | ||
2048 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2049 | ||
2050 | switch (slave->link) { | |
2051 | case BOND_LINK_UP: /* the link was up */ | |
2052 | if (link_state == BMSR_LSTATUS) { | |
2053 | /* link stays up, nothing more to do */ | |
2054 | break; | |
2055 | } else { /* link going down */ | |
2056 | slave->link = BOND_LINK_FAIL; | |
2057 | slave->delay = bond->params.downdelay; | |
2058 | ||
2059 | if (slave->link_failure_count < UINT_MAX) { | |
2060 | slave->link_failure_count++; | |
2061 | } | |
2062 | ||
2063 | if (bond->params.downdelay) { | |
2064 | printk(KERN_INFO DRV_NAME | |
2065 | ": %s: link status down for %s " | |
2066 | "interface %s, disabling it in " | |
2067 | "%d ms.\n", | |
2068 | bond_dev->name, | |
2069 | IS_UP(slave_dev) | |
2070 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2071 | ? ((slave == oldcurrent) | |
2072 | ? "active " : "backup ") | |
2073 | : "") | |
2074 | : "idle ", | |
2075 | slave_dev->name, | |
2076 | bond->params.downdelay * bond->params.miimon); | |
2077 | } | |
2078 | } | |
2079 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2080 | ensure proper action to be taken | |
2081 | */ | |
2082 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2083 | if (link_state != BMSR_LSTATUS) { | |
2084 | /* link stays down */ | |
2085 | if (slave->delay <= 0) { | |
2086 | /* link down for too long time */ | |
2087 | slave->link = BOND_LINK_DOWN; | |
2088 | ||
2089 | /* in active/backup mode, we must | |
2090 | * completely disable this interface | |
2091 | */ | |
2092 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2093 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2094 | bond_set_slave_inactive_flags(slave); | |
2095 | } | |
2096 | ||
2097 | printk(KERN_INFO DRV_NAME | |
2098 | ": %s: link status definitely " | |
2099 | "down for interface %s, " | |
2100 | "disabling it\n", | |
2101 | bond_dev->name, | |
2102 | slave_dev->name); | |
2103 | ||
2104 | /* notify ad that the link status has changed */ | |
2105 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2106 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2107 | } | |
2108 | ||
2109 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2110 | (bond->params.mode == BOND_MODE_ALB)) { | |
2111 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2112 | } | |
2113 | ||
2114 | if (slave == oldcurrent) { | |
2115 | do_failover = 1; | |
2116 | } | |
2117 | } else { | |
2118 | slave->delay--; | |
2119 | } | |
2120 | } else { | |
2121 | /* link up again */ | |
2122 | slave->link = BOND_LINK_UP; | |
2123 | slave->jiffies = jiffies; | |
2124 | printk(KERN_INFO DRV_NAME | |
2125 | ": %s: link status up again after %d " | |
2126 | "ms for interface %s.\n", | |
2127 | bond_dev->name, | |
2128 | (bond->params.downdelay - slave->delay) * bond->params.miimon, | |
2129 | slave_dev->name); | |
2130 | } | |
2131 | break; | |
2132 | case BOND_LINK_DOWN: /* the link was down */ | |
2133 | if (link_state != BMSR_LSTATUS) { | |
2134 | /* the link stays down, nothing more to do */ | |
2135 | break; | |
2136 | } else { /* link going up */ | |
2137 | slave->link = BOND_LINK_BACK; | |
2138 | slave->delay = bond->params.updelay; | |
2139 | ||
2140 | if (bond->params.updelay) { | |
2141 | /* if updelay == 0, no need to | |
2142 | advertise about a 0 ms delay */ | |
2143 | printk(KERN_INFO DRV_NAME | |
2144 | ": %s: link status up for " | |
2145 | "interface %s, enabling it " | |
2146 | "in %d ms.\n", | |
2147 | bond_dev->name, | |
2148 | slave_dev->name, | |
2149 | bond->params.updelay * bond->params.miimon); | |
2150 | } | |
2151 | } | |
2152 | /* no break ! fall through the BOND_LINK_BACK state in | |
2153 | case there's something to do. | |
2154 | */ | |
2155 | case BOND_LINK_BACK: /* the link has just come back */ | |
2156 | if (link_state != BMSR_LSTATUS) { | |
2157 | /* link down again */ | |
2158 | slave->link = BOND_LINK_DOWN; | |
2159 | ||
2160 | printk(KERN_INFO DRV_NAME | |
2161 | ": %s: link status down again after %d " | |
2162 | "ms for interface %s.\n", | |
2163 | bond_dev->name, | |
2164 | (bond->params.updelay - slave->delay) * bond->params.miimon, | |
2165 | slave_dev->name); | |
2166 | } else { | |
2167 | /* link stays up */ | |
2168 | if (slave->delay == 0) { | |
2169 | /* now the link has been up for long time enough */ | |
2170 | slave->link = BOND_LINK_UP; | |
2171 | slave->jiffies = jiffies; | |
2172 | ||
2173 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2174 | /* prevent it from being the active one */ | |
2175 | slave->state = BOND_STATE_BACKUP; | |
2176 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2177 | /* make it immediately active */ | |
2178 | slave->state = BOND_STATE_ACTIVE; | |
2179 | } else if (slave != bond->primary_slave) { | |
2180 | /* prevent it from being the active one */ | |
2181 | slave->state = BOND_STATE_BACKUP; | |
2182 | } | |
2183 | ||
2184 | printk(KERN_INFO DRV_NAME | |
2185 | ": %s: link status definitely " | |
2186 | "up for interface %s.\n", | |
2187 | bond_dev->name, | |
2188 | slave_dev->name); | |
2189 | ||
2190 | /* notify ad that the link status has changed */ | |
2191 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2192 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2193 | } | |
2194 | ||
2195 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2196 | (bond->params.mode == BOND_MODE_ALB)) { | |
2197 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2198 | } | |
2199 | ||
2200 | if ((!oldcurrent) || | |
2201 | (slave == bond->primary_slave)) { | |
2202 | do_failover = 1; | |
2203 | } | |
2204 | } else { | |
2205 | slave->delay--; | |
2206 | } | |
2207 | } | |
2208 | break; | |
2209 | default: | |
2210 | /* Should not happen */ | |
4e0952c7 MW |
2211 | printk(KERN_ERR DRV_NAME |
2212 | ": %s: Error: %s Illegal value (link=%d)\n", | |
2213 | bond_dev->name, | |
2214 | slave->dev->name, | |
2215 | slave->link); | |
1da177e4 LT |
2216 | goto out; |
2217 | } /* end of switch (slave->link) */ | |
2218 | ||
2219 | bond_update_speed_duplex(slave); | |
2220 | ||
2221 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2222 | if (old_speed != slave->speed) { | |
2223 | bond_3ad_adapter_speed_changed(slave); | |
2224 | } | |
2225 | ||
2226 | if (old_duplex != slave->duplex) { | |
2227 | bond_3ad_adapter_duplex_changed(slave); | |
2228 | } | |
2229 | } | |
2230 | ||
2231 | } /* end of for */ | |
2232 | ||
2233 | if (do_failover) { | |
2234 | write_lock(&bond->curr_slave_lock); | |
2235 | ||
2236 | bond_select_active_slave(bond); | |
2237 | ||
1da177e4 | 2238 | write_unlock(&bond->curr_slave_lock); |
ff59c456 JV |
2239 | } else |
2240 | bond_set_carrier(bond); | |
1da177e4 LT |
2241 | |
2242 | re_arm: | |
2243 | if (bond->params.miimon) { | |
2244 | mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); | |
2245 | } | |
2246 | out: | |
2247 | read_unlock(&bond->lock); | |
2248 | } | |
2249 | ||
c3ade5ca JV |
2250 | |
2251 | static u32 bond_glean_dev_ip(struct net_device *dev) | |
2252 | { | |
2253 | struct in_device *idev; | |
2254 | struct in_ifaddr *ifa; | |
2255 | u32 addr = 0; | |
2256 | ||
2257 | if (!dev) | |
2258 | return 0; | |
2259 | ||
2260 | rcu_read_lock(); | |
e5ed6399 | 2261 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2262 | if (!idev) |
2263 | goto out; | |
2264 | ||
2265 | ifa = idev->ifa_list; | |
2266 | if (!ifa) | |
2267 | goto out; | |
2268 | ||
2269 | addr = ifa->ifa_local; | |
2270 | out: | |
2271 | rcu_read_unlock(); | |
2272 | return addr; | |
2273 | } | |
2274 | ||
2275 | static int bond_has_ip(struct bonding *bond) | |
2276 | { | |
2277 | struct vlan_entry *vlan, *vlan_next; | |
2278 | ||
2279 | if (bond->master_ip) | |
2280 | return 1; | |
2281 | ||
2282 | if (list_empty(&bond->vlan_list)) | |
2283 | return 0; | |
2284 | ||
2285 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2286 | vlan_list) { | |
2287 | if (vlan->vlan_ip) | |
2288 | return 1; | |
2289 | } | |
2290 | ||
2291 | return 0; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2296 | * switches in VLAN mode (especially if ports are configured as | |
2297 | * "native" to a VLAN) might not pass non-tagged frames. | |
2298 | */ | |
2299 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id) | |
2300 | { | |
2301 | struct sk_buff *skb; | |
2302 | ||
2303 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2304 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2305 | ||
2306 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2307 | NULL, slave_dev->dev_addr, NULL); | |
2308 | ||
2309 | if (!skb) { | |
2310 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2311 | return; | |
2312 | } | |
2313 | if (vlan_id) { | |
2314 | skb = vlan_put_tag(skb, vlan_id); | |
2315 | if (!skb) { | |
2316 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2317 | return; | |
2318 | } | |
2319 | } | |
2320 | arp_xmit(skb); | |
2321 | } | |
2322 | ||
2323 | ||
1da177e4 LT |
2324 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2325 | { | |
c3ade5ca | 2326 | int i, vlan_id, rv; |
1da177e4 | 2327 | u32 *targets = bond->params.arp_targets; |
c3ade5ca JV |
2328 | struct vlan_entry *vlan, *vlan_next; |
2329 | struct net_device *vlan_dev; | |
2330 | struct flowi fl; | |
2331 | struct rtable *rt; | |
1da177e4 | 2332 | |
6b780567 MW |
2333 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2334 | if (!targets[i]) | |
2335 | continue; | |
c3ade5ca JV |
2336 | dprintk("basa: target %x\n", targets[i]); |
2337 | if (list_empty(&bond->vlan_list)) { | |
2338 | dprintk("basa: empty vlan: arp_send\n"); | |
2339 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2340 | bond->master_ip, 0); | |
2341 | continue; | |
2342 | } | |
2343 | ||
2344 | /* | |
2345 | * If VLANs are configured, we do a route lookup to | |
2346 | * determine which VLAN interface would be used, so we | |
2347 | * can tag the ARP with the proper VLAN tag. | |
2348 | */ | |
2349 | memset(&fl, 0, sizeof(fl)); | |
2350 | fl.fl4_dst = targets[i]; | |
2351 | fl.fl4_tos = RTO_ONLINK; | |
2352 | ||
2353 | rv = ip_route_output_key(&rt, &fl); | |
2354 | if (rv) { | |
2355 | if (net_ratelimit()) { | |
2356 | printk(KERN_WARNING DRV_NAME | |
2357 | ": %s: no route to arp_ip_target %u.%u.%u.%u\n", | |
2358 | bond->dev->name, NIPQUAD(fl.fl4_dst)); | |
2359 | } | |
2360 | continue; | |
2361 | } | |
2362 | ||
2363 | /* | |
2364 | * This target is not on a VLAN | |
2365 | */ | |
2366 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2367 | ip_rt_put(rt); |
c3ade5ca JV |
2368 | dprintk("basa: rtdev == bond->dev: arp_send\n"); |
2369 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2370 | bond->master_ip, 0); | |
2371 | continue; | |
2372 | } | |
2373 | ||
2374 | vlan_id = 0; | |
2375 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2376 | vlan_list) { | |
2377 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2378 | if (vlan_dev == rt->u.dst.dev) { | |
2379 | vlan_id = vlan->vlan_id; | |
2380 | dprintk("basa: vlan match on %s %d\n", | |
2381 | vlan_dev->name, vlan_id); | |
2382 | break; | |
2383 | } | |
2384 | } | |
2385 | ||
2386 | if (vlan_id) { | |
ed4b9f80 | 2387 | ip_rt_put(rt); |
c3ade5ca JV |
2388 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2389 | vlan->vlan_ip, vlan_id); | |
2390 | continue; | |
2391 | } | |
2392 | ||
2393 | if (net_ratelimit()) { | |
2394 | printk(KERN_WARNING DRV_NAME | |
2395 | ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n", | |
2396 | bond->dev->name, NIPQUAD(fl.fl4_dst), | |
2397 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
2398 | } | |
ed4b9f80 | 2399 | ip_rt_put(rt); |
c3ade5ca JV |
2400 | } |
2401 | } | |
2402 | ||
2403 | /* | |
2404 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2405 | * for each VLAN above us. | |
2406 | */ | |
2407 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2408 | { | |
2409 | struct slave *slave = bond->curr_active_slave; | |
2410 | struct vlan_entry *vlan; | |
2411 | struct net_device *vlan_dev; | |
2412 | ||
2413 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2414 | slave ? slave->dev->name : "NULL"); | |
2415 | if (!slave) | |
2416 | return; | |
2417 | ||
2418 | if (bond->master_ip) { | |
2419 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
2420 | bond->master_ip, 0); | |
2421 | } | |
2422 | ||
2423 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
2424 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2425 | if (vlan->vlan_ip) { | |
2426 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2427 | vlan->vlan_ip, vlan->vlan_id); | |
2428 | } | |
1da177e4 LT |
2429 | } |
2430 | } | |
2431 | ||
2432 | /* | |
2433 | * this function is called regularly to monitor each slave's link | |
2434 | * ensuring that traffic is being sent and received when arp monitoring | |
2435 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2436 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2437 | * arp monitoring in active backup mode. | |
2438 | */ | |
a77b5325 | 2439 | void bond_loadbalance_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2440 | { |
2441 | struct bonding *bond = bond_dev->priv; | |
2442 | struct slave *slave, *oldcurrent; | |
2443 | int do_failover = 0; | |
2444 | int delta_in_ticks; | |
2445 | int i; | |
2446 | ||
2447 | read_lock(&bond->lock); | |
2448 | ||
2449 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2450 | ||
2451 | if (bond->kill_timers) { | |
2452 | goto out; | |
2453 | } | |
2454 | ||
2455 | if (bond->slave_cnt == 0) { | |
2456 | goto re_arm; | |
2457 | } | |
2458 | ||
2459 | read_lock(&bond->curr_slave_lock); | |
2460 | oldcurrent = bond->curr_active_slave; | |
2461 | read_unlock(&bond->curr_slave_lock); | |
2462 | ||
2463 | /* see if any of the previous devices are up now (i.e. they have | |
2464 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2465 | * the picture unless it is null. also, slave->jiffies is not needed | |
2466 | * here because we send an arp on each slave and give a slave as | |
2467 | * long as it needs to get the tx/rx within the delta. | |
2468 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2469 | * so it can wait | |
2470 | */ | |
2471 | bond_for_each_slave(bond, slave, i) { | |
2472 | if (slave->link != BOND_LINK_UP) { | |
2473 | if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && | |
2474 | ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { | |
2475 | ||
2476 | slave->link = BOND_LINK_UP; | |
2477 | slave->state = BOND_STATE_ACTIVE; | |
2478 | ||
2479 | /* primary_slave has no meaning in round-robin | |
2480 | * mode. the window of a slave being up and | |
2481 | * curr_active_slave being null after enslaving | |
2482 | * is closed. | |
2483 | */ | |
2484 | if (!oldcurrent) { | |
2485 | printk(KERN_INFO DRV_NAME | |
2486 | ": %s: link status definitely " | |
2487 | "up for interface %s, ", | |
2488 | bond_dev->name, | |
2489 | slave->dev->name); | |
2490 | do_failover = 1; | |
2491 | } else { | |
2492 | printk(KERN_INFO DRV_NAME | |
2493 | ": %s: interface %s is now up\n", | |
2494 | bond_dev->name, | |
2495 | slave->dev->name); | |
2496 | } | |
2497 | } | |
2498 | } else { | |
2499 | /* slave->link == BOND_LINK_UP */ | |
2500 | ||
2501 | /* not all switches will respond to an arp request | |
2502 | * when the source ip is 0, so don't take the link down | |
2503 | * if we don't know our ip yet | |
2504 | */ | |
2505 | if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2506 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
c3ade5ca | 2507 | bond_has_ip(bond))) { |
1da177e4 LT |
2508 | |
2509 | slave->link = BOND_LINK_DOWN; | |
2510 | slave->state = BOND_STATE_BACKUP; | |
2511 | ||
2512 | if (slave->link_failure_count < UINT_MAX) { | |
2513 | slave->link_failure_count++; | |
2514 | } | |
2515 | ||
2516 | printk(KERN_INFO DRV_NAME | |
2517 | ": %s: interface %s is now down.\n", | |
2518 | bond_dev->name, | |
2519 | slave->dev->name); | |
2520 | ||
2521 | if (slave == oldcurrent) { | |
2522 | do_failover = 1; | |
2523 | } | |
2524 | } | |
2525 | } | |
2526 | ||
2527 | /* note: if switch is in round-robin mode, all links | |
2528 | * must tx arp to ensure all links rx an arp - otherwise | |
2529 | * links may oscillate or not come up at all; if switch is | |
2530 | * in something like xor mode, there is nothing we can | |
2531 | * do - all replies will be rx'ed on same link causing slaves | |
2532 | * to be unstable during low/no traffic periods | |
2533 | */ | |
2534 | if (IS_UP(slave->dev)) { | |
2535 | bond_arp_send_all(bond, slave); | |
2536 | } | |
2537 | } | |
2538 | ||
2539 | if (do_failover) { | |
2540 | write_lock(&bond->curr_slave_lock); | |
2541 | ||
2542 | bond_select_active_slave(bond); | |
2543 | ||
1da177e4 LT |
2544 | write_unlock(&bond->curr_slave_lock); |
2545 | } | |
2546 | ||
2547 | re_arm: | |
2548 | if (bond->params.arp_interval) { | |
2549 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2550 | } | |
2551 | out: | |
2552 | read_unlock(&bond->lock); | |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | * When using arp monitoring in active-backup mode, this function is | |
2557 | * called to determine if any backup slaves have went down or a new | |
2558 | * current slave needs to be found. | |
2559 | * The backup slaves never generate traffic, they are considered up by merely | |
2560 | * receiving traffic. If the current slave goes down, each backup slave will | |
2561 | * be given the opportunity to tx/rx an arp before being taken down - this | |
2562 | * prevents all slaves from being taken down due to the current slave not | |
2563 | * sending any traffic for the backups to receive. The arps are not necessarily | |
2564 | * necessary, any tx and rx traffic will keep the current slave up. While any | |
2565 | * rx traffic will keep the backup slaves up, the current slave is responsible | |
2566 | * for generating traffic to keep them up regardless of any other traffic they | |
2567 | * may have received. | |
2568 | * see loadbalance_arp_monitor for arp monitoring in load balancing mode | |
2569 | */ | |
a77b5325 | 2570 | void bond_activebackup_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2571 | { |
2572 | struct bonding *bond = bond_dev->priv; | |
2573 | struct slave *slave; | |
2574 | int delta_in_ticks; | |
2575 | int i; | |
2576 | ||
2577 | read_lock(&bond->lock); | |
2578 | ||
2579 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2580 | ||
2581 | if (bond->kill_timers) { | |
2582 | goto out; | |
2583 | } | |
2584 | ||
2585 | if (bond->slave_cnt == 0) { | |
2586 | goto re_arm; | |
2587 | } | |
2588 | ||
2589 | /* determine if any slave has come up or any backup slave has | |
2590 | * gone down | |
2591 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2592 | * so it can wait | |
2593 | */ | |
2594 | bond_for_each_slave(bond, slave, i) { | |
2595 | if (slave->link != BOND_LINK_UP) { | |
2596 | if ((jiffies - slave->dev->last_rx) <= delta_in_ticks) { | |
2597 | ||
2598 | slave->link = BOND_LINK_UP; | |
2599 | ||
2600 | write_lock(&bond->curr_slave_lock); | |
2601 | ||
2602 | if ((!bond->curr_active_slave) && | |
2603 | ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { | |
2604 | bond_change_active_slave(bond, slave); | |
2605 | bond->current_arp_slave = NULL; | |
2606 | } else if (bond->curr_active_slave != slave) { | |
2607 | /* this slave has just come up but we | |
2608 | * already have a current slave; this | |
2609 | * can also happen if bond_enslave adds | |
2610 | * a new slave that is up while we are | |
2611 | * searching for a new slave | |
2612 | */ | |
2613 | bond_set_slave_inactive_flags(slave); | |
2614 | bond->current_arp_slave = NULL; | |
2615 | } | |
2616 | ||
ff59c456 JV |
2617 | bond_set_carrier(bond); |
2618 | ||
1da177e4 LT |
2619 | if (slave == bond->curr_active_slave) { |
2620 | printk(KERN_INFO DRV_NAME | |
2621 | ": %s: %s is up and now the " | |
2622 | "active interface\n", | |
2623 | bond_dev->name, | |
2624 | slave->dev->name); | |
ff59c456 | 2625 | netif_carrier_on(bond->dev); |
1da177e4 LT |
2626 | } else { |
2627 | printk(KERN_INFO DRV_NAME | |
2628 | ": %s: backup interface %s is " | |
2629 | "now up\n", | |
2630 | bond_dev->name, | |
2631 | slave->dev->name); | |
2632 | } | |
2633 | ||
2634 | write_unlock(&bond->curr_slave_lock); | |
2635 | } | |
2636 | } else { | |
2637 | read_lock(&bond->curr_slave_lock); | |
2638 | ||
2639 | if ((slave != bond->curr_active_slave) && | |
2640 | (!bond->current_arp_slave) && | |
2641 | (((jiffies - slave->dev->last_rx) >= 3*delta_in_ticks) && | |
c3ade5ca | 2642 | bond_has_ip(bond))) { |
1da177e4 LT |
2643 | /* a backup slave has gone down; three times |
2644 | * the delta allows the current slave to be | |
2645 | * taken out before the backup slave. | |
2646 | * note: a non-null current_arp_slave indicates | |
2647 | * the curr_active_slave went down and we are | |
2648 | * searching for a new one; under this | |
2649 | * condition we only take the curr_active_slave | |
2650 | * down - this gives each slave a chance to | |
2651 | * tx/rx traffic before being taken out | |
2652 | */ | |
2653 | ||
2654 | read_unlock(&bond->curr_slave_lock); | |
2655 | ||
2656 | slave->link = BOND_LINK_DOWN; | |
2657 | ||
2658 | if (slave->link_failure_count < UINT_MAX) { | |
2659 | slave->link_failure_count++; | |
2660 | } | |
2661 | ||
2662 | bond_set_slave_inactive_flags(slave); | |
2663 | ||
2664 | printk(KERN_INFO DRV_NAME | |
2665 | ": %s: backup interface %s is now down\n", | |
2666 | bond_dev->name, | |
2667 | slave->dev->name); | |
2668 | } else { | |
2669 | read_unlock(&bond->curr_slave_lock); | |
2670 | } | |
2671 | } | |
2672 | } | |
2673 | ||
2674 | read_lock(&bond->curr_slave_lock); | |
2675 | slave = bond->curr_active_slave; | |
2676 | read_unlock(&bond->curr_slave_lock); | |
2677 | ||
2678 | if (slave) { | |
2679 | /* if we have sent traffic in the past 2*arp_intervals but | |
2680 | * haven't xmit and rx traffic in that time interval, select | |
2681 | * a different slave. slave->jiffies is only updated when | |
2682 | * a slave first becomes the curr_active_slave - not necessarily | |
2683 | * after every arp; this ensures the slave has a full 2*delta | |
2684 | * before being taken out. if a primary is being used, check | |
2685 | * if it is up and needs to take over as the curr_active_slave | |
2686 | */ | |
2687 | if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
c3ade5ca JV |
2688 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && |
2689 | bond_has_ip(bond))) && | |
1da177e4 LT |
2690 | ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { |
2691 | ||
2692 | slave->link = BOND_LINK_DOWN; | |
2693 | ||
2694 | if (slave->link_failure_count < UINT_MAX) { | |
2695 | slave->link_failure_count++; | |
2696 | } | |
2697 | ||
2698 | printk(KERN_INFO DRV_NAME | |
2699 | ": %s: link status down for active interface " | |
2700 | "%s, disabling it\n", | |
2701 | bond_dev->name, | |
2702 | slave->dev->name); | |
2703 | ||
2704 | write_lock(&bond->curr_slave_lock); | |
2705 | ||
2706 | bond_select_active_slave(bond); | |
2707 | slave = bond->curr_active_slave; | |
2708 | ||
2709 | write_unlock(&bond->curr_slave_lock); | |
2710 | ||
2711 | bond->current_arp_slave = slave; | |
2712 | ||
2713 | if (slave) { | |
2714 | slave->jiffies = jiffies; | |
2715 | } | |
2716 | } else if ((bond->primary_slave) && | |
2717 | (bond->primary_slave != slave) && | |
2718 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
2719 | /* at this point, slave is the curr_active_slave */ | |
2720 | printk(KERN_INFO DRV_NAME | |
2721 | ": %s: changing from interface %s to primary " | |
2722 | "interface %s\n", | |
2723 | bond_dev->name, | |
2724 | slave->dev->name, | |
2725 | bond->primary_slave->dev->name); | |
2726 | ||
2727 | /* primary is up so switch to it */ | |
2728 | write_lock(&bond->curr_slave_lock); | |
2729 | bond_change_active_slave(bond, bond->primary_slave); | |
2730 | write_unlock(&bond->curr_slave_lock); | |
2731 | ||
2732 | slave = bond->primary_slave; | |
2733 | slave->jiffies = jiffies; | |
2734 | } else { | |
2735 | bond->current_arp_slave = NULL; | |
2736 | } | |
2737 | ||
2738 | /* the current slave must tx an arp to ensure backup slaves | |
2739 | * rx traffic | |
2740 | */ | |
c3ade5ca | 2741 | if (slave && bond_has_ip(bond)) { |
1da177e4 LT |
2742 | bond_arp_send_all(bond, slave); |
2743 | } | |
2744 | } | |
2745 | ||
2746 | /* if we don't have a curr_active_slave, search for the next available | |
2747 | * backup slave from the current_arp_slave and make it the candidate | |
2748 | * for becoming the curr_active_slave | |
2749 | */ | |
2750 | if (!slave) { | |
2751 | if (!bond->current_arp_slave) { | |
2752 | bond->current_arp_slave = bond->first_slave; | |
2753 | } | |
2754 | ||
2755 | if (bond->current_arp_slave) { | |
2756 | bond_set_slave_inactive_flags(bond->current_arp_slave); | |
2757 | ||
2758 | /* search for next candidate */ | |
2f872f04 | 2759 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { |
1da177e4 LT |
2760 | if (IS_UP(slave->dev)) { |
2761 | slave->link = BOND_LINK_BACK; | |
2762 | bond_set_slave_active_flags(slave); | |
2763 | bond_arp_send_all(bond, slave); | |
2764 | slave->jiffies = jiffies; | |
2765 | bond->current_arp_slave = slave; | |
2766 | break; | |
2767 | } | |
2768 | ||
2769 | /* if the link state is up at this point, we | |
2770 | * mark it down - this can happen if we have | |
2771 | * simultaneous link failures and | |
2772 | * reselect_active_interface doesn't make this | |
2773 | * one the current slave so it is still marked | |
2774 | * up when it is actually down | |
2775 | */ | |
2776 | if (slave->link == BOND_LINK_UP) { | |
2777 | slave->link = BOND_LINK_DOWN; | |
2778 | if (slave->link_failure_count < UINT_MAX) { | |
2779 | slave->link_failure_count++; | |
2780 | } | |
2781 | ||
2782 | bond_set_slave_inactive_flags(slave); | |
2783 | ||
2784 | printk(KERN_INFO DRV_NAME | |
2785 | ": %s: backup interface %s is " | |
2786 | "now down.\n", | |
2787 | bond_dev->name, | |
2788 | slave->dev->name); | |
2789 | } | |
2790 | } | |
2791 | } | |
2792 | } | |
2793 | ||
2794 | re_arm: | |
2795 | if (bond->params.arp_interval) { | |
2796 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2797 | } | |
2798 | out: | |
2799 | read_unlock(&bond->lock); | |
2800 | } | |
2801 | ||
2802 | /*------------------------------ proc/seq_file-------------------------------*/ | |
2803 | ||
2804 | #ifdef CONFIG_PROC_FS | |
2805 | ||
2806 | #define SEQ_START_TOKEN ((void *)1) | |
2807 | ||
2808 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) | |
2809 | { | |
2810 | struct bonding *bond = seq->private; | |
2811 | loff_t off = 0; | |
2812 | struct slave *slave; | |
2813 | int i; | |
2814 | ||
2815 | /* make sure the bond won't be taken away */ | |
2816 | read_lock(&dev_base_lock); | |
2817 | read_lock_bh(&bond->lock); | |
2818 | ||
2819 | if (*pos == 0) { | |
2820 | return SEQ_START_TOKEN; | |
2821 | } | |
2822 | ||
2823 | bond_for_each_slave(bond, slave, i) { | |
2824 | if (++off == *pos) { | |
2825 | return slave; | |
2826 | } | |
2827 | } | |
2828 | ||
2829 | return NULL; | |
2830 | } | |
2831 | ||
2832 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2833 | { | |
2834 | struct bonding *bond = seq->private; | |
2835 | struct slave *slave = v; | |
2836 | ||
2837 | ++*pos; | |
2838 | if (v == SEQ_START_TOKEN) { | |
2839 | return bond->first_slave; | |
2840 | } | |
2841 | ||
2842 | slave = slave->next; | |
2843 | ||
2844 | return (slave == bond->first_slave) ? NULL : slave; | |
2845 | } | |
2846 | ||
2847 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
2848 | { | |
2849 | struct bonding *bond = seq->private; | |
2850 | ||
2851 | read_unlock_bh(&bond->lock); | |
2852 | read_unlock(&dev_base_lock); | |
2853 | } | |
2854 | ||
2855 | static void bond_info_show_master(struct seq_file *seq) | |
2856 | { | |
2857 | struct bonding *bond = seq->private; | |
2858 | struct slave *curr; | |
4756b02f MW |
2859 | int i; |
2860 | u32 target; | |
1da177e4 LT |
2861 | |
2862 | read_lock(&bond->curr_slave_lock); | |
2863 | curr = bond->curr_active_slave; | |
2864 | read_unlock(&bond->curr_slave_lock); | |
2865 | ||
2866 | seq_printf(seq, "Bonding Mode: %s\n", | |
2867 | bond_mode_name(bond->params.mode)); | |
2868 | ||
c61b75ad MW |
2869 | if (bond->params.mode == BOND_MODE_XOR || |
2870 | bond->params.mode == BOND_MODE_8023AD) { | |
2871 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
2872 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
2873 | bond->params.xmit_policy); | |
2874 | } | |
2875 | ||
1da177e4 LT |
2876 | if (USES_PRIMARY(bond->params.mode)) { |
2877 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
2878 | (bond->primary_slave) ? |
2879 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
2880 | |
2881 | seq_printf(seq, "Currently Active Slave: %s\n", | |
2882 | (curr) ? curr->dev->name : "None"); | |
2883 | } | |
2884 | ||
ff59c456 JV |
2885 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
2886 | "up" : "down"); | |
1da177e4 LT |
2887 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
2888 | seq_printf(seq, "Up Delay (ms): %d\n", | |
2889 | bond->params.updelay * bond->params.miimon); | |
2890 | seq_printf(seq, "Down Delay (ms): %d\n", | |
2891 | bond->params.downdelay * bond->params.miimon); | |
2892 | ||
4756b02f MW |
2893 | |
2894 | /* ARP information */ | |
2895 | if(bond->params.arp_interval > 0) { | |
2896 | int printed=0; | |
2897 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", | |
2898 | bond->params.arp_interval); | |
2899 | ||
2900 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
2901 | ||
2902 | for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) { | |
2903 | if (!bond->params.arp_targets[i]) | |
2904 | continue; | |
2905 | if (printed) | |
2906 | seq_printf(seq, ","); | |
2907 | target = ntohl(bond->params.arp_targets[i]); | |
2908 | seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target)); | |
2909 | printed = 1; | |
2910 | } | |
2911 | seq_printf(seq, "\n"); | |
2912 | } | |
2913 | ||
1da177e4 LT |
2914 | if (bond->params.mode == BOND_MODE_8023AD) { |
2915 | struct ad_info ad_info; | |
2916 | ||
2917 | seq_puts(seq, "\n802.3ad info\n"); | |
2918 | seq_printf(seq, "LACP rate: %s\n", | |
2919 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
2920 | ||
2921 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
2922 | seq_printf(seq, "bond %s has no active aggregator\n", | |
2923 | bond->dev->name); | |
2924 | } else { | |
2925 | seq_printf(seq, "Active Aggregator Info:\n"); | |
2926 | ||
2927 | seq_printf(seq, "\tAggregator ID: %d\n", | |
2928 | ad_info.aggregator_id); | |
2929 | seq_printf(seq, "\tNumber of ports: %d\n", | |
2930 | ad_info.ports); | |
2931 | seq_printf(seq, "\tActor Key: %d\n", | |
2932 | ad_info.actor_key); | |
2933 | seq_printf(seq, "\tPartner Key: %d\n", | |
2934 | ad_info.partner_key); | |
2935 | seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
2936 | ad_info.partner_system[0], | |
2937 | ad_info.partner_system[1], | |
2938 | ad_info.partner_system[2], | |
2939 | ad_info.partner_system[3], | |
2940 | ad_info.partner_system[4], | |
2941 | ad_info.partner_system[5]); | |
2942 | } | |
2943 | } | |
2944 | } | |
2945 | ||
2946 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
2947 | { | |
2948 | struct bonding *bond = seq->private; | |
2949 | ||
2950 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
2951 | seq_printf(seq, "MII Status: %s\n", | |
2952 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
2953 | seq_printf(seq, "Link Failure Count: %d\n", | |
2954 | slave->link_failure_count); | |
2955 | ||
217df670 JV |
2956 | seq_printf(seq, |
2957 | "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
2958 | slave->perm_hwaddr[0], slave->perm_hwaddr[1], | |
2959 | slave->perm_hwaddr[2], slave->perm_hwaddr[3], | |
2960 | slave->perm_hwaddr[4], slave->perm_hwaddr[5]); | |
1da177e4 LT |
2961 | |
2962 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2963 | const struct aggregator *agg | |
2964 | = SLAVE_AD_INFO(slave).port.aggregator; | |
2965 | ||
2966 | if (agg) { | |
2967 | seq_printf(seq, "Aggregator ID: %d\n", | |
2968 | agg->aggregator_identifier); | |
2969 | } else { | |
2970 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
2971 | } | |
2972 | } | |
2973 | } | |
2974 | ||
2975 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
2976 | { | |
2977 | if (v == SEQ_START_TOKEN) { | |
2978 | seq_printf(seq, "%s\n", version); | |
2979 | bond_info_show_master(seq); | |
2980 | } else { | |
2981 | bond_info_show_slave(seq, v); | |
2982 | } | |
2983 | ||
2984 | return 0; | |
2985 | } | |
2986 | ||
2987 | static struct seq_operations bond_info_seq_ops = { | |
2988 | .start = bond_info_seq_start, | |
2989 | .next = bond_info_seq_next, | |
2990 | .stop = bond_info_seq_stop, | |
2991 | .show = bond_info_seq_show, | |
2992 | }; | |
2993 | ||
2994 | static int bond_info_open(struct inode *inode, struct file *file) | |
2995 | { | |
2996 | struct seq_file *seq; | |
2997 | struct proc_dir_entry *proc; | |
2998 | int res; | |
2999 | ||
3000 | res = seq_open(file, &bond_info_seq_ops); | |
3001 | if (!res) { | |
3002 | /* recover the pointer buried in proc_dir_entry data */ | |
3003 | seq = file->private_data; | |
3004 | proc = PDE(inode); | |
3005 | seq->private = proc->data; | |
3006 | } | |
3007 | ||
3008 | return res; | |
3009 | } | |
3010 | ||
3011 | static struct file_operations bond_info_fops = { | |
3012 | .owner = THIS_MODULE, | |
3013 | .open = bond_info_open, | |
3014 | .read = seq_read, | |
3015 | .llseek = seq_lseek, | |
3016 | .release = seq_release, | |
3017 | }; | |
3018 | ||
3019 | static int bond_create_proc_entry(struct bonding *bond) | |
3020 | { | |
3021 | struct net_device *bond_dev = bond->dev; | |
3022 | ||
3023 | if (bond_proc_dir) { | |
3024 | bond->proc_entry = create_proc_entry(bond_dev->name, | |
3025 | S_IRUGO, | |
3026 | bond_proc_dir); | |
3027 | if (bond->proc_entry == NULL) { | |
3028 | printk(KERN_WARNING DRV_NAME | |
3029 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3030 | DRV_NAME, bond_dev->name); | |
3031 | } else { | |
3032 | bond->proc_entry->data = bond; | |
3033 | bond->proc_entry->proc_fops = &bond_info_fops; | |
3034 | bond->proc_entry->owner = THIS_MODULE; | |
3035 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); | |
3036 | } | |
3037 | } | |
3038 | ||
3039 | return 0; | |
3040 | } | |
3041 | ||
3042 | static void bond_remove_proc_entry(struct bonding *bond) | |
3043 | { | |
3044 | if (bond_proc_dir && bond->proc_entry) { | |
3045 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3046 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3047 | bond->proc_entry = NULL; | |
3048 | } | |
3049 | } | |
3050 | ||
3051 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3052 | * Caller must hold rtnl_lock. | |
3053 | */ | |
3054 | static void bond_create_proc_dir(void) | |
3055 | { | |
3056 | int len = strlen(DRV_NAME); | |
3057 | ||
3058 | for (bond_proc_dir = proc_net->subdir; bond_proc_dir; | |
3059 | bond_proc_dir = bond_proc_dir->next) { | |
3060 | if ((bond_proc_dir->namelen == len) && | |
3061 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3062 | break; | |
3063 | } | |
3064 | } | |
3065 | ||
3066 | if (!bond_proc_dir) { | |
3067 | bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); | |
3068 | if (bond_proc_dir) { | |
3069 | bond_proc_dir->owner = THIS_MODULE; | |
3070 | } else { | |
3071 | printk(KERN_WARNING DRV_NAME | |
3072 | ": Warning: cannot create /proc/net/%s\n", | |
3073 | DRV_NAME); | |
3074 | } | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | /* Destroy the bonding directory under /proc/net, if empty. | |
3079 | * Caller must hold rtnl_lock. | |
3080 | */ | |
3081 | static void bond_destroy_proc_dir(void) | |
3082 | { | |
3083 | struct proc_dir_entry *de; | |
3084 | ||
3085 | if (!bond_proc_dir) { | |
3086 | return; | |
3087 | } | |
3088 | ||
3089 | /* verify that the /proc dir is empty */ | |
3090 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3091 | /* ignore . and .. */ | |
3092 | if (*(de->name) != '.') { | |
3093 | break; | |
3094 | } | |
3095 | } | |
3096 | ||
3097 | if (de) { | |
3098 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3099 | bond_proc_dir->owner = NULL; | |
3100 | } | |
3101 | } else { | |
3102 | remove_proc_entry(DRV_NAME, proc_net); | |
3103 | bond_proc_dir = NULL; | |
3104 | } | |
3105 | } | |
3106 | #endif /* CONFIG_PROC_FS */ | |
3107 | ||
3108 | /*-------------------------- netdev event handling --------------------------*/ | |
3109 | ||
3110 | /* | |
3111 | * Change device name | |
3112 | */ | |
3113 | static int bond_event_changename(struct bonding *bond) | |
3114 | { | |
3115 | #ifdef CONFIG_PROC_FS | |
3116 | bond_remove_proc_entry(bond); | |
3117 | bond_create_proc_entry(bond); | |
3118 | #endif | |
b76cdba9 MW |
3119 | down_write(&(bonding_rwsem)); |
3120 | bond_destroy_sysfs_entry(bond); | |
3121 | bond_create_sysfs_entry(bond); | |
3122 | up_write(&(bonding_rwsem)); | |
1da177e4 LT |
3123 | return NOTIFY_DONE; |
3124 | } | |
3125 | ||
3126 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3127 | { | |
3128 | struct bonding *event_bond = bond_dev->priv; | |
3129 | ||
3130 | switch (event) { | |
3131 | case NETDEV_CHANGENAME: | |
3132 | return bond_event_changename(event_bond); | |
3133 | case NETDEV_UNREGISTER: | |
3134 | /* | |
3135 | * TODO: remove a bond from the list? | |
3136 | */ | |
3137 | break; | |
3138 | default: | |
3139 | break; | |
3140 | } | |
3141 | ||
3142 | return NOTIFY_DONE; | |
3143 | } | |
3144 | ||
3145 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3146 | { | |
3147 | struct net_device *bond_dev = slave_dev->master; | |
8531c5ff | 3148 | struct bonding *bond = bond_dev->priv; |
1da177e4 LT |
3149 | |
3150 | switch (event) { | |
3151 | case NETDEV_UNREGISTER: | |
3152 | if (bond_dev) { | |
3153 | bond_release(bond_dev, slave_dev); | |
3154 | } | |
3155 | break; | |
3156 | case NETDEV_CHANGE: | |
3157 | /* | |
3158 | * TODO: is this what we get if somebody | |
3159 | * sets up a hierarchical bond, then rmmod's | |
3160 | * one of the slave bonding devices? | |
3161 | */ | |
3162 | break; | |
3163 | case NETDEV_DOWN: | |
3164 | /* | |
3165 | * ... Or is it this? | |
3166 | */ | |
3167 | break; | |
3168 | case NETDEV_CHANGEMTU: | |
3169 | /* | |
3170 | * TODO: Should slaves be allowed to | |
3171 | * independently alter their MTU? For | |
3172 | * an active-backup bond, slaves need | |
3173 | * not be the same type of device, so | |
3174 | * MTUs may vary. For other modes, | |
3175 | * slaves arguably should have the | |
3176 | * same MTUs. To do this, we'd need to | |
3177 | * take over the slave's change_mtu | |
3178 | * function for the duration of their | |
3179 | * servitude. | |
3180 | */ | |
3181 | break; | |
3182 | case NETDEV_CHANGENAME: | |
3183 | /* | |
3184 | * TODO: handle changing the primary's name | |
3185 | */ | |
3186 | break; | |
8531c5ff AK |
3187 | case NETDEV_FEAT_CHANGE: |
3188 | bond_compute_features(bond); | |
3189 | break; | |
1da177e4 LT |
3190 | default: |
3191 | break; | |
3192 | } | |
3193 | ||
3194 | return NOTIFY_DONE; | |
3195 | } | |
3196 | ||
3197 | /* | |
3198 | * bond_netdev_event: handle netdev notifier chain events. | |
3199 | * | |
3200 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3201 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3202 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3203 | * dev_probe_lock). | |
3204 | */ | |
3205 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3206 | { | |
3207 | struct net_device *event_dev = (struct net_device *)ptr; | |
3208 | ||
3209 | dprintk("event_dev: %s, event: %lx\n", | |
3210 | (event_dev ? event_dev->name : "None"), | |
3211 | event); | |
3212 | ||
3213 | if (event_dev->flags & IFF_MASTER) { | |
3214 | dprintk("IFF_MASTER\n"); | |
3215 | return bond_master_netdev_event(event, event_dev); | |
3216 | } | |
3217 | ||
3218 | if (event_dev->flags & IFF_SLAVE) { | |
3219 | dprintk("IFF_SLAVE\n"); | |
3220 | return bond_slave_netdev_event(event, event_dev); | |
3221 | } | |
3222 | ||
3223 | return NOTIFY_DONE; | |
3224 | } | |
3225 | ||
c3ade5ca JV |
3226 | /* |
3227 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3228 | * | |
3229 | * We keep track of device IPs primarily to use as source addresses in | |
3230 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3231 | * | |
3232 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3233 | */ | |
3234 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3235 | { | |
3236 | struct in_ifaddr *ifa = ptr; | |
3237 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
3238 | struct bonding *bond, *bond_next; | |
3239 | struct vlan_entry *vlan, *vlan_next; | |
3240 | ||
3241 | list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) { | |
3242 | if (bond->dev == event_dev) { | |
3243 | switch (event) { | |
3244 | case NETDEV_UP: | |
3245 | bond->master_ip = ifa->ifa_local; | |
3246 | return NOTIFY_OK; | |
3247 | case NETDEV_DOWN: | |
3248 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3249 | return NOTIFY_OK; | |
3250 | default: | |
3251 | return NOTIFY_DONE; | |
3252 | } | |
3253 | } | |
3254 | ||
3255 | if (list_empty(&bond->vlan_list)) | |
3256 | continue; | |
3257 | ||
3258 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
3259 | vlan_list) { | |
3260 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
3261 | if (vlan_dev == event_dev) { | |
3262 | switch (event) { | |
3263 | case NETDEV_UP: | |
3264 | vlan->vlan_ip = ifa->ifa_local; | |
3265 | return NOTIFY_OK; | |
3266 | case NETDEV_DOWN: | |
3267 | vlan->vlan_ip = | |
3268 | bond_glean_dev_ip(vlan_dev); | |
3269 | return NOTIFY_OK; | |
3270 | default: | |
3271 | return NOTIFY_DONE; | |
3272 | } | |
3273 | } | |
3274 | } | |
3275 | } | |
3276 | return NOTIFY_DONE; | |
3277 | } | |
3278 | ||
1da177e4 LT |
3279 | static struct notifier_block bond_netdev_notifier = { |
3280 | .notifier_call = bond_netdev_event, | |
3281 | }; | |
3282 | ||
c3ade5ca JV |
3283 | static struct notifier_block bond_inetaddr_notifier = { |
3284 | .notifier_call = bond_inetaddr_event, | |
3285 | }; | |
3286 | ||
1da177e4 LT |
3287 | /*-------------------------- Packet type handling ---------------------------*/ |
3288 | ||
3289 | /* register to receive lacpdus on a bond */ | |
3290 | static void bond_register_lacpdu(struct bonding *bond) | |
3291 | { | |
3292 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3293 | ||
3294 | /* initialize packet type */ | |
3295 | pk_type->type = PKT_TYPE_LACPDU; | |
3296 | pk_type->dev = bond->dev; | |
3297 | pk_type->func = bond_3ad_lacpdu_recv; | |
3298 | ||
3299 | dev_add_pack(pk_type); | |
3300 | } | |
3301 | ||
3302 | /* unregister to receive lacpdus on a bond */ | |
3303 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3304 | { | |
3305 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3306 | } | |
3307 | ||
169a3e66 JV |
3308 | /*---------------------------- Hashing Policies -----------------------------*/ |
3309 | ||
3310 | /* | |
3311 | * Hash for the the output device based upon layer 3 and layer 4 data. If | |
3312 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is | |
3313 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3314 | */ | |
3315 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3316 | struct net_device *bond_dev, int count) | |
3317 | { | |
3318 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3319 | struct iphdr *iph = skb->nh.iph; | |
3320 | u16 *layer4hdr = (u16 *)((u32 *)iph + iph->ihl); | |
3321 | int layer4_xor = 0; | |
3322 | ||
3323 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
3324 | if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) && | |
3325 | (iph->protocol == IPPROTO_TCP || | |
3326 | iph->protocol == IPPROTO_UDP)) { | |
3327 | layer4_xor = htons((*layer4hdr ^ *(layer4hdr + 1))); | |
3328 | } | |
3329 | return (layer4_xor ^ | |
3330 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3331 | ||
3332 | } | |
3333 | ||
3334 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3335 | } | |
3336 | ||
3337 | /* | |
3338 | * Hash for the output device based upon layer 2 data | |
3339 | */ | |
3340 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3341 | struct net_device *bond_dev, int count) | |
3342 | { | |
3343 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3344 | ||
3345 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3346 | } | |
3347 | ||
1da177e4 LT |
3348 | /*-------------------------- Device entry points ----------------------------*/ |
3349 | ||
3350 | static int bond_open(struct net_device *bond_dev) | |
3351 | { | |
3352 | struct bonding *bond = bond_dev->priv; | |
3353 | struct timer_list *mii_timer = &bond->mii_timer; | |
3354 | struct timer_list *arp_timer = &bond->arp_timer; | |
3355 | ||
3356 | bond->kill_timers = 0; | |
3357 | ||
3358 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3359 | (bond->params.mode == BOND_MODE_ALB)) { | |
3360 | struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); | |
3361 | ||
3362 | /* bond_alb_initialize must be called before the timer | |
3363 | * is started. | |
3364 | */ | |
3365 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3366 | /* something went wrong - fail the open operation */ | |
3367 | return -1; | |
3368 | } | |
3369 | ||
3370 | init_timer(alb_timer); | |
3371 | alb_timer->expires = jiffies + 1; | |
3372 | alb_timer->data = (unsigned long)bond; | |
3373 | alb_timer->function = (void *)&bond_alb_monitor; | |
3374 | add_timer(alb_timer); | |
3375 | } | |
3376 | ||
3377 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3378 | init_timer(mii_timer); | |
3379 | mii_timer->expires = jiffies + 1; | |
3380 | mii_timer->data = (unsigned long)bond_dev; | |
3381 | mii_timer->function = (void *)&bond_mii_monitor; | |
3382 | add_timer(mii_timer); | |
3383 | } | |
3384 | ||
3385 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3386 | init_timer(arp_timer); | |
3387 | arp_timer->expires = jiffies + 1; | |
3388 | arp_timer->data = (unsigned long)bond_dev; | |
3389 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3390 | arp_timer->function = (void *)&bond_activebackup_arp_mon; | |
3391 | } else { | |
3392 | arp_timer->function = (void *)&bond_loadbalance_arp_mon; | |
3393 | } | |
3394 | add_timer(arp_timer); | |
3395 | } | |
3396 | ||
3397 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3398 | struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); | |
3399 | init_timer(ad_timer); | |
3400 | ad_timer->expires = jiffies + 1; | |
3401 | ad_timer->data = (unsigned long)bond; | |
3402 | ad_timer->function = (void *)&bond_3ad_state_machine_handler; | |
3403 | add_timer(ad_timer); | |
3404 | ||
3405 | /* register to receive LACPDUs */ | |
3406 | bond_register_lacpdu(bond); | |
3407 | } | |
3408 | ||
3409 | return 0; | |
3410 | } | |
3411 | ||
3412 | static int bond_close(struct net_device *bond_dev) | |
3413 | { | |
3414 | struct bonding *bond = bond_dev->priv; | |
3415 | ||
3416 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3417 | /* Unregister the receive of LACPDUs */ | |
3418 | bond_unregister_lacpdu(bond); | |
3419 | } | |
3420 | ||
3421 | write_lock_bh(&bond->lock); | |
3422 | ||
3423 | bond_mc_list_destroy(bond); | |
3424 | ||
3425 | /* signal timers not to re-arm */ | |
3426 | bond->kill_timers = 1; | |
3427 | ||
3428 | write_unlock_bh(&bond->lock); | |
3429 | ||
3430 | /* del_timer_sync must run without holding the bond->lock | |
3431 | * because a running timer might be trying to hold it too | |
3432 | */ | |
3433 | ||
3434 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3435 | del_timer_sync(&bond->mii_timer); | |
3436 | } | |
3437 | ||
3438 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3439 | del_timer_sync(&bond->arp_timer); | |
3440 | } | |
3441 | ||
3442 | switch (bond->params.mode) { | |
3443 | case BOND_MODE_8023AD: | |
3444 | del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); | |
3445 | break; | |
3446 | case BOND_MODE_TLB: | |
3447 | case BOND_MODE_ALB: | |
3448 | del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); | |
3449 | break; | |
3450 | default: | |
3451 | break; | |
3452 | } | |
3453 | ||
3454 | /* Release the bonded slaves */ | |
3455 | bond_release_all(bond_dev); | |
3456 | ||
3457 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3458 | (bond->params.mode == BOND_MODE_ALB)) { | |
3459 | /* Must be called only after all | |
3460 | * slaves have been released | |
3461 | */ | |
3462 | bond_alb_deinitialize(bond); | |
3463 | } | |
3464 | ||
3465 | return 0; | |
3466 | } | |
3467 | ||
3468 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3469 | { | |
3470 | struct bonding *bond = bond_dev->priv; | |
3471 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
3472 | struct slave *slave; | |
3473 | int i; | |
3474 | ||
3475 | memset(stats, 0, sizeof(struct net_device_stats)); | |
3476 | ||
3477 | read_lock_bh(&bond->lock); | |
3478 | ||
3479 | bond_for_each_slave(bond, slave, i) { | |
3480 | sstats = slave->dev->get_stats(slave->dev); | |
3481 | ||
3482 | stats->rx_packets += sstats->rx_packets; | |
3483 | stats->rx_bytes += sstats->rx_bytes; | |
3484 | stats->rx_errors += sstats->rx_errors; | |
3485 | stats->rx_dropped += sstats->rx_dropped; | |
3486 | ||
3487 | stats->tx_packets += sstats->tx_packets; | |
3488 | stats->tx_bytes += sstats->tx_bytes; | |
3489 | stats->tx_errors += sstats->tx_errors; | |
3490 | stats->tx_dropped += sstats->tx_dropped; | |
3491 | ||
3492 | stats->multicast += sstats->multicast; | |
3493 | stats->collisions += sstats->collisions; | |
3494 | ||
3495 | stats->rx_length_errors += sstats->rx_length_errors; | |
3496 | stats->rx_over_errors += sstats->rx_over_errors; | |
3497 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3498 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3499 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3500 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3501 | ||
3502 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3503 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3504 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3505 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3506 | stats->tx_window_errors += sstats->tx_window_errors; | |
3507 | } | |
3508 | ||
3509 | read_unlock_bh(&bond->lock); | |
3510 | ||
3511 | return stats; | |
3512 | } | |
3513 | ||
3514 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3515 | { | |
3516 | struct net_device *slave_dev = NULL; | |
3517 | struct ifbond k_binfo; | |
3518 | struct ifbond __user *u_binfo = NULL; | |
3519 | struct ifslave k_sinfo; | |
3520 | struct ifslave __user *u_sinfo = NULL; | |
3521 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3522 | int res = 0; |
3523 | ||
3524 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3525 | bond_dev->name, cmd); | |
3526 | ||
3527 | switch (cmd) { | |
1da177e4 LT |
3528 | case SIOCGMIIPHY: |
3529 | mii = if_mii(ifr); | |
3530 | if (!mii) { | |
3531 | return -EINVAL; | |
3532 | } | |
3533 | mii->phy_id = 0; | |
3534 | /* Fall Through */ | |
3535 | case SIOCGMIIREG: | |
3536 | /* | |
3537 | * We do this again just in case we were called by SIOCGMIIREG | |
3538 | * instead of SIOCGMIIPHY. | |
3539 | */ | |
3540 | mii = if_mii(ifr); | |
3541 | if (!mii) { | |
3542 | return -EINVAL; | |
3543 | } | |
3544 | ||
3545 | if (mii->reg_num == 1) { | |
3546 | struct bonding *bond = bond_dev->priv; | |
3547 | mii->val_out = 0; | |
3548 | read_lock_bh(&bond->lock); | |
3549 | read_lock(&bond->curr_slave_lock); | |
3550 | if (bond->curr_active_slave) { | |
3551 | mii->val_out = BMSR_LSTATUS; | |
3552 | } | |
3553 | read_unlock(&bond->curr_slave_lock); | |
3554 | read_unlock_bh(&bond->lock); | |
3555 | } | |
3556 | ||
3557 | return 0; | |
3558 | case BOND_INFO_QUERY_OLD: | |
3559 | case SIOCBONDINFOQUERY: | |
3560 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3561 | ||
3562 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3563 | return -EFAULT; | |
3564 | } | |
3565 | ||
3566 | res = bond_info_query(bond_dev, &k_binfo); | |
3567 | if (res == 0) { | |
3568 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3569 | return -EFAULT; | |
3570 | } | |
3571 | } | |
3572 | ||
3573 | return res; | |
3574 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3575 | case SIOCBONDSLAVEINFOQUERY: | |
3576 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3577 | ||
3578 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3579 | return -EFAULT; | |
3580 | } | |
3581 | ||
3582 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3583 | if (res == 0) { | |
3584 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
3585 | return -EFAULT; | |
3586 | } | |
3587 | } | |
3588 | ||
3589 | return res; | |
3590 | default: | |
3591 | /* Go on */ | |
3592 | break; | |
3593 | } | |
3594 | ||
3595 | if (!capable(CAP_NET_ADMIN)) { | |
3596 | return -EPERM; | |
3597 | } | |
3598 | ||
b76cdba9 | 3599 | down_write(&(bonding_rwsem)); |
1da177e4 LT |
3600 | slave_dev = dev_get_by_name(ifr->ifr_slave); |
3601 | ||
3602 | dprintk("slave_dev=%p: \n", slave_dev); | |
3603 | ||
3604 | if (!slave_dev) { | |
3605 | res = -ENODEV; | |
3606 | } else { | |
3607 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
3608 | switch (cmd) { | |
3609 | case BOND_ENSLAVE_OLD: | |
3610 | case SIOCBONDENSLAVE: | |
3611 | res = bond_enslave(bond_dev, slave_dev); | |
3612 | break; | |
3613 | case BOND_RELEASE_OLD: | |
3614 | case SIOCBONDRELEASE: | |
3615 | res = bond_release(bond_dev, slave_dev); | |
3616 | break; | |
3617 | case BOND_SETHWADDR_OLD: | |
3618 | case SIOCBONDSETHWADDR: | |
3619 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3620 | break; | |
3621 | case BOND_CHANGE_ACTIVE_OLD: | |
3622 | case SIOCBONDCHANGEACTIVE: | |
3623 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3624 | break; | |
3625 | default: | |
3626 | res = -EOPNOTSUPP; | |
3627 | } | |
3628 | ||
3629 | dev_put(slave_dev); | |
3630 | } | |
3631 | ||
b76cdba9 | 3632 | up_write(&(bonding_rwsem)); |
1da177e4 LT |
3633 | return res; |
3634 | } | |
3635 | ||
3636 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
3637 | { | |
3638 | struct bonding *bond = bond_dev->priv; | |
3639 | struct dev_mc_list *dmi; | |
3640 | ||
3641 | write_lock_bh(&bond->lock); | |
3642 | ||
3643 | /* | |
3644 | * Do promisc before checking multicast_mode | |
3645 | */ | |
3646 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
3647 | bond_set_promiscuity(bond, 1); | |
3648 | } | |
3649 | ||
3650 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
3651 | bond_set_promiscuity(bond, -1); | |
3652 | } | |
3653 | ||
3654 | /* set allmulti flag to slaves */ | |
3655 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
3656 | bond_set_allmulti(bond, 1); | |
3657 | } | |
3658 | ||
3659 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
3660 | bond_set_allmulti(bond, -1); | |
3661 | } | |
3662 | ||
3663 | bond->flags = bond_dev->flags; | |
3664 | ||
3665 | /* looking for addresses to add to slaves' mc list */ | |
3666 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
3667 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
3668 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3669 | } | |
3670 | } | |
3671 | ||
3672 | /* looking for addresses to delete from slaves' list */ | |
3673 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
3674 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
3675 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3676 | } | |
3677 | } | |
3678 | ||
3679 | /* save master's multicast list */ | |
3680 | bond_mc_list_destroy(bond); | |
3681 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
3682 | ||
3683 | write_unlock_bh(&bond->lock); | |
3684 | } | |
3685 | ||
3686 | /* | |
3687 | * Change the MTU of all of a master's slaves to match the master | |
3688 | */ | |
3689 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3690 | { | |
3691 | struct bonding *bond = bond_dev->priv; | |
3692 | struct slave *slave, *stop_at; | |
3693 | int res = 0; | |
3694 | int i; | |
3695 | ||
3696 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
3697 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
3698 | ||
3699 | /* Can't hold bond->lock with bh disabled here since | |
3700 | * some base drivers panic. On the other hand we can't | |
3701 | * hold bond->lock without bh disabled because we'll | |
3702 | * deadlock. The only solution is to rely on the fact | |
3703 | * that we're under rtnl_lock here, and the slaves | |
3704 | * list won't change. This doesn't solve the problem | |
3705 | * of setting the slave's MTU while it is | |
3706 | * transmitting, but the assumption is that the base | |
3707 | * driver can handle that. | |
3708 | * | |
3709 | * TODO: figure out a way to safely iterate the slaves | |
3710 | * list, but without holding a lock around the actual | |
3711 | * call to the base driver. | |
3712 | */ | |
3713 | ||
3714 | bond_for_each_slave(bond, slave, i) { | |
3715 | dprintk("s %p s->p %p c_m %p\n", slave, | |
3716 | slave->prev, slave->dev->change_mtu); | |
e944ef79 | 3717 | |
1da177e4 LT |
3718 | res = dev_set_mtu(slave->dev, new_mtu); |
3719 | ||
3720 | if (res) { | |
3721 | /* If we failed to set the slave's mtu to the new value | |
3722 | * we must abort the operation even in ACTIVE_BACKUP | |
3723 | * mode, because if we allow the backup slaves to have | |
3724 | * different mtu values than the active slave we'll | |
3725 | * need to change their mtu when doing a failover. That | |
3726 | * means changing their mtu from timer context, which | |
3727 | * is probably not a good idea. | |
3728 | */ | |
3729 | dprintk("err %d %s\n", res, slave->dev->name); | |
3730 | goto unwind; | |
3731 | } | |
3732 | } | |
3733 | ||
3734 | bond_dev->mtu = new_mtu; | |
3735 | ||
3736 | return 0; | |
3737 | ||
3738 | unwind: | |
3739 | /* unwind from head to the slave that failed */ | |
3740 | stop_at = slave; | |
3741 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3742 | int tmp_res; | |
3743 | ||
3744 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3745 | if (tmp_res) { | |
3746 | dprintk("unwind err %d dev %s\n", tmp_res, | |
3747 | slave->dev->name); | |
3748 | } | |
3749 | } | |
3750 | ||
3751 | return res; | |
3752 | } | |
3753 | ||
3754 | /* | |
3755 | * Change HW address | |
3756 | * | |
3757 | * Note that many devices must be down to change the HW address, and | |
3758 | * downing the master releases all slaves. We can make bonds full of | |
3759 | * bonding devices to test this, however. | |
3760 | */ | |
3761 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3762 | { | |
3763 | struct bonding *bond = bond_dev->priv; | |
3764 | struct sockaddr *sa = addr, tmp_sa; | |
3765 | struct slave *slave, *stop_at; | |
3766 | int res = 0; | |
3767 | int i; | |
3768 | ||
3769 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
3770 | ||
3771 | if (!is_valid_ether_addr(sa->sa_data)) { | |
3772 | return -EADDRNOTAVAIL; | |
3773 | } | |
3774 | ||
3775 | /* Can't hold bond->lock with bh disabled here since | |
3776 | * some base drivers panic. On the other hand we can't | |
3777 | * hold bond->lock without bh disabled because we'll | |
3778 | * deadlock. The only solution is to rely on the fact | |
3779 | * that we're under rtnl_lock here, and the slaves | |
3780 | * list won't change. This doesn't solve the problem | |
3781 | * of setting the slave's hw address while it is | |
3782 | * transmitting, but the assumption is that the base | |
3783 | * driver can handle that. | |
3784 | * | |
3785 | * TODO: figure out a way to safely iterate the slaves | |
3786 | * list, but without holding a lock around the actual | |
3787 | * call to the base driver. | |
3788 | */ | |
3789 | ||
3790 | bond_for_each_slave(bond, slave, i) { | |
3791 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
3792 | ||
3793 | if (slave->dev->set_mac_address == NULL) { | |
3794 | res = -EOPNOTSUPP; | |
3795 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
3796 | goto unwind; | |
3797 | } | |
3798 | ||
3799 | res = dev_set_mac_address(slave->dev, addr); | |
3800 | if (res) { | |
3801 | /* TODO: consider downing the slave | |
3802 | * and retry ? | |
3803 | * User should expect communications | |
3804 | * breakage anyway until ARP finish | |
3805 | * updating, so... | |
3806 | */ | |
3807 | dprintk("err %d %s\n", res, slave->dev->name); | |
3808 | goto unwind; | |
3809 | } | |
3810 | } | |
3811 | ||
3812 | /* success */ | |
3813 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3814 | return 0; | |
3815 | ||
3816 | unwind: | |
3817 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3818 | tmp_sa.sa_family = bond_dev->type; | |
3819 | ||
3820 | /* unwind from head to the slave that failed */ | |
3821 | stop_at = slave; | |
3822 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3823 | int tmp_res; | |
3824 | ||
3825 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3826 | if (tmp_res) { | |
3827 | dprintk("unwind err %d dev %s\n", tmp_res, | |
3828 | slave->dev->name); | |
3829 | } | |
3830 | } | |
3831 | ||
3832 | return res; | |
3833 | } | |
3834 | ||
3835 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3836 | { | |
3837 | struct bonding *bond = bond_dev->priv; | |
3838 | struct slave *slave, *start_at; | |
3839 | int i; | |
3840 | int res = 1; | |
3841 | ||
3842 | read_lock(&bond->lock); | |
3843 | ||
3844 | if (!BOND_IS_OK(bond)) { | |
3845 | goto out; | |
3846 | } | |
3847 | ||
3848 | read_lock(&bond->curr_slave_lock); | |
3849 | slave = start_at = bond->curr_active_slave; | |
3850 | read_unlock(&bond->curr_slave_lock); | |
3851 | ||
3852 | if (!slave) { | |
3853 | goto out; | |
3854 | } | |
3855 | ||
3856 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
3857 | if (IS_UP(slave->dev) && | |
3858 | (slave->link == BOND_LINK_UP) && | |
3859 | (slave->state == BOND_STATE_ACTIVE)) { | |
3860 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
3861 | ||
3862 | write_lock(&bond->curr_slave_lock); | |
3863 | bond->curr_active_slave = slave->next; | |
3864 | write_unlock(&bond->curr_slave_lock); | |
3865 | ||
3866 | break; | |
3867 | } | |
3868 | } | |
3869 | ||
3870 | ||
3871 | out: | |
3872 | if (res) { | |
3873 | /* no suitable interface, frame not sent */ | |
3874 | dev_kfree_skb(skb); | |
3875 | } | |
3876 | read_unlock(&bond->lock); | |
3877 | return 0; | |
3878 | } | |
3879 | ||
075897ce | 3880 | static void bond_activebackup_xmit_copy(struct sk_buff *skb, |
df49898a JL |
3881 | struct bonding *bond, |
3882 | struct slave *slave) | |
075897ce JL |
3883 | { |
3884 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
3885 | struct ethhdr *eth_data; | |
3886 | u8 *hwaddr; | |
3887 | int res; | |
3888 | ||
3889 | if (!skb2) { | |
3890 | printk(KERN_ERR DRV_NAME ": Error: " | |
3891 | "bond_activebackup_xmit_copy(): skb_copy() failed\n"); | |
3892 | return; | |
3893 | } | |
3894 | ||
3895 | skb2->mac.raw = (unsigned char *)skb2->data; | |
3896 | eth_data = eth_hdr(skb2); | |
3897 | ||
df49898a JL |
3898 | /* Pick an appropriate source MAC address |
3899 | * -- use slave's perm MAC addr, unless used by bond | |
3900 | * -- otherwise, borrow active slave's perm MAC addr | |
3901 | * since that will not be used | |
3902 | */ | |
075897ce JL |
3903 | hwaddr = slave->perm_hwaddr; |
3904 | if (!memcmp(eth_data->h_source, hwaddr, ETH_ALEN)) | |
3905 | hwaddr = bond->curr_active_slave->perm_hwaddr; | |
3906 | ||
3907 | /* Set source MAC address appropriately */ | |
3908 | memcpy(eth_data->h_source, hwaddr, ETH_ALEN); | |
3909 | ||
3910 | res = bond_dev_queue_xmit(bond, skb2, slave->dev); | |
3911 | if (res) | |
3912 | dev_kfree_skb(skb2); | |
3913 | ||
3914 | return; | |
3915 | } | |
3916 | ||
1da177e4 LT |
3917 | /* |
3918 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
3919 | * the bond has a usable interface. | |
3920 | */ | |
3921 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
3922 | { | |
3923 | struct bonding *bond = bond_dev->priv; | |
3924 | int res = 1; | |
3925 | ||
1da177e4 LT |
3926 | read_lock(&bond->lock); |
3927 | read_lock(&bond->curr_slave_lock); | |
3928 | ||
3929 | if (!BOND_IS_OK(bond)) { | |
3930 | goto out; | |
3931 | } | |
3932 | ||
075897ce JL |
3933 | if (!bond->curr_active_slave) |
3934 | goto out; | |
3935 | ||
3936 | /* Xmit IGMP frames on all slaves to ensure rapid fail-over | |
3937 | for multicast traffic on snooping switches */ | |
3938 | if (skb->protocol == __constant_htons(ETH_P_IP) && | |
3939 | skb->nh.iph->protocol == IPPROTO_IGMP) { | |
3940 | struct slave *slave, *active_slave; | |
3941 | int i; | |
3942 | ||
3943 | active_slave = bond->curr_active_slave; | |
3944 | bond_for_each_slave_from_to(bond, slave, i, active_slave->next, | |
3945 | active_slave->prev) | |
3946 | if (IS_UP(slave->dev) && | |
3947 | (slave->link == BOND_LINK_UP)) | |
3948 | bond_activebackup_xmit_copy(skb, bond, slave); | |
1da177e4 LT |
3949 | } |
3950 | ||
075897ce JL |
3951 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
3952 | ||
1da177e4 LT |
3953 | out: |
3954 | if (res) { | |
3955 | /* no suitable interface, frame not sent */ | |
3956 | dev_kfree_skb(skb); | |
3957 | } | |
3958 | read_unlock(&bond->curr_slave_lock); | |
3959 | read_unlock(&bond->lock); | |
3960 | return 0; | |
3961 | } | |
3962 | ||
3963 | /* | |
169a3e66 JV |
3964 | * In bond_xmit_xor() , we determine the output device by using a pre- |
3965 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
3966 | * find the next active slave. | |
1da177e4 LT |
3967 | */ |
3968 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
3969 | { | |
3970 | struct bonding *bond = bond_dev->priv; | |
1da177e4 LT |
3971 | struct slave *slave, *start_at; |
3972 | int slave_no; | |
3973 | int i; | |
3974 | int res = 1; | |
3975 | ||
3976 | read_lock(&bond->lock); | |
3977 | ||
3978 | if (!BOND_IS_OK(bond)) { | |
3979 | goto out; | |
3980 | } | |
3981 | ||
169a3e66 | 3982 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
3983 | |
3984 | bond_for_each_slave(bond, slave, i) { | |
3985 | slave_no--; | |
3986 | if (slave_no < 0) { | |
3987 | break; | |
3988 | } | |
3989 | } | |
3990 | ||
3991 | start_at = slave; | |
3992 | ||
3993 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
3994 | if (IS_UP(slave->dev) && | |
3995 | (slave->link == BOND_LINK_UP) && | |
3996 | (slave->state == BOND_STATE_ACTIVE)) { | |
3997 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
3998 | break; | |
3999 | } | |
4000 | } | |
4001 | ||
4002 | out: | |
4003 | if (res) { | |
4004 | /* no suitable interface, frame not sent */ | |
4005 | dev_kfree_skb(skb); | |
4006 | } | |
4007 | read_unlock(&bond->lock); | |
4008 | return 0; | |
4009 | } | |
4010 | ||
4011 | /* | |
4012 | * in broadcast mode, we send everything to all usable interfaces. | |
4013 | */ | |
4014 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4015 | { | |
4016 | struct bonding *bond = bond_dev->priv; | |
4017 | struct slave *slave, *start_at; | |
4018 | struct net_device *tx_dev = NULL; | |
4019 | int i; | |
4020 | int res = 1; | |
4021 | ||
4022 | read_lock(&bond->lock); | |
4023 | ||
4024 | if (!BOND_IS_OK(bond)) { | |
4025 | goto out; | |
4026 | } | |
4027 | ||
4028 | read_lock(&bond->curr_slave_lock); | |
4029 | start_at = bond->curr_active_slave; | |
4030 | read_unlock(&bond->curr_slave_lock); | |
4031 | ||
4032 | if (!start_at) { | |
4033 | goto out; | |
4034 | } | |
4035 | ||
4036 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4037 | if (IS_UP(slave->dev) && | |
4038 | (slave->link == BOND_LINK_UP) && | |
4039 | (slave->state == BOND_STATE_ACTIVE)) { | |
4040 | if (tx_dev) { | |
4041 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4042 | if (!skb2) { | |
4043 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4044 | ": %s: Error: bond_xmit_broadcast(): " |
4045 | "skb_clone() failed\n", | |
4046 | bond_dev->name); | |
1da177e4 LT |
4047 | continue; |
4048 | } | |
4049 | ||
4050 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4051 | if (res) { | |
4052 | dev_kfree_skb(skb2); | |
4053 | continue; | |
4054 | } | |
4055 | } | |
4056 | tx_dev = slave->dev; | |
4057 | } | |
4058 | } | |
4059 | ||
4060 | if (tx_dev) { | |
4061 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4062 | } | |
4063 | ||
4064 | out: | |
4065 | if (res) { | |
4066 | /* no suitable interface, frame not sent */ | |
4067 | dev_kfree_skb(skb); | |
4068 | } | |
4069 | /* frame sent to all suitable interfaces */ | |
4070 | read_unlock(&bond->lock); | |
4071 | return 0; | |
4072 | } | |
4073 | ||
4074 | /*------------------------- Device initialization ---------------------------*/ | |
4075 | ||
4076 | /* | |
4077 | * set bond mode specific net device operations | |
4078 | */ | |
a77b5325 | 4079 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4080 | { |
169a3e66 JV |
4081 | struct net_device *bond_dev = bond->dev; |
4082 | ||
1da177e4 LT |
4083 | switch (mode) { |
4084 | case BOND_MODE_ROUNDROBIN: | |
4085 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4086 | break; | |
4087 | case BOND_MODE_ACTIVEBACKUP: | |
4088 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4089 | break; | |
4090 | case BOND_MODE_XOR: | |
4091 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
169a3e66 JV |
4092 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4093 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4094 | else | |
4095 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 LT |
4096 | break; |
4097 | case BOND_MODE_BROADCAST: | |
4098 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4099 | break; | |
4100 | case BOND_MODE_8023AD: | |
8f903c70 | 4101 | bond_set_master_3ad_flags(bond); |
1da177e4 | 4102 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; |
169a3e66 JV |
4103 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4104 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4105 | else | |
4106 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 | 4107 | break; |
1da177e4 | 4108 | case BOND_MODE_ALB: |
8f903c70 JV |
4109 | bond_set_master_alb_flags(bond); |
4110 | /* FALLTHRU */ | |
4111 | case BOND_MODE_TLB: | |
1da177e4 LT |
4112 | bond_dev->hard_start_xmit = bond_alb_xmit; |
4113 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4114 | break; | |
4115 | default: | |
4116 | /* Should never happen, mode already checked */ | |
4117 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4118 | ": %s: Error: Unknown bonding mode %d\n", |
4119 | bond_dev->name, | |
1da177e4 LT |
4120 | mode); |
4121 | break; | |
4122 | } | |
4123 | } | |
4124 | ||
217df670 JV |
4125 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4126 | struct ethtool_drvinfo *drvinfo) | |
4127 | { | |
4128 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4129 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4130 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4131 | } | |
4132 | ||
7282d491 | 4133 | static const struct ethtool_ops bond_ethtool_ops = { |
8531c5ff | 4134 | .get_tx_csum = ethtool_op_get_tx_csum, |
a0de3adf JV |
4135 | .get_tso = ethtool_op_get_tso, |
4136 | .get_ufo = ethtool_op_get_ufo, | |
8531c5ff | 4137 | .get_sg = ethtool_op_get_sg, |
217df670 | 4138 | .get_drvinfo = bond_ethtool_get_drvinfo, |
8531c5ff AK |
4139 | }; |
4140 | ||
1da177e4 LT |
4141 | /* |
4142 | * Does not allocate but creates a /proc entry. | |
4143 | * Allowed to fail. | |
4144 | */ | |
3c535952 | 4145 | static int bond_init(struct net_device *bond_dev, struct bond_params *params) |
1da177e4 LT |
4146 | { |
4147 | struct bonding *bond = bond_dev->priv; | |
4148 | ||
4149 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4150 | ||
4151 | /* initialize rwlocks */ | |
4152 | rwlock_init(&bond->lock); | |
4153 | rwlock_init(&bond->curr_slave_lock); | |
4154 | ||
4155 | bond->params = *params; /* copy params struct */ | |
4156 | ||
4157 | /* Initialize pointers */ | |
4158 | bond->first_slave = NULL; | |
4159 | bond->curr_active_slave = NULL; | |
4160 | bond->current_arp_slave = NULL; | |
4161 | bond->primary_slave = NULL; | |
4162 | bond->dev = bond_dev; | |
4163 | INIT_LIST_HEAD(&bond->vlan_list); | |
4164 | ||
4165 | /* Initialize the device entry points */ | |
4166 | bond_dev->open = bond_open; | |
4167 | bond_dev->stop = bond_close; | |
4168 | bond_dev->get_stats = bond_get_stats; | |
4169 | bond_dev->do_ioctl = bond_do_ioctl; | |
8531c5ff | 4170 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 LT |
4171 | bond_dev->set_multicast_list = bond_set_multicast_list; |
4172 | bond_dev->change_mtu = bond_change_mtu; | |
4173 | bond_dev->set_mac_address = bond_set_mac_address; | |
4174 | ||
169a3e66 | 4175 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 LT |
4176 | |
4177 | bond_dev->destructor = free_netdev; | |
4178 | ||
4179 | /* Initialize the device options */ | |
4180 | bond_dev->tx_queue_len = 0; | |
4181 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
4182 | ||
4183 | /* At first, we block adding VLANs. That's the only way to | |
4184 | * prevent problems that occur when adding VLANs over an | |
4185 | * empty bond. The block will be removed once non-challenged | |
4186 | * slaves are enslaved. | |
4187 | */ | |
4188 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4189 | ||
932ff279 | 4190 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4191 | * transmitting */ |
4192 | bond_dev->features |= NETIF_F_LLTX; | |
4193 | ||
4194 | /* By default, we declare the bond to be fully | |
4195 | * VLAN hardware accelerated capable. Special | |
4196 | * care is taken in the various xmit functions | |
4197 | * when there are slaves that are not hw accel | |
4198 | * capable | |
4199 | */ | |
4200 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4201 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4202 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4203 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4204 | NETIF_F_HW_VLAN_RX | | |
4205 | NETIF_F_HW_VLAN_FILTER); | |
4206 | ||
4207 | #ifdef CONFIG_PROC_FS | |
4208 | bond_create_proc_entry(bond); | |
4209 | #endif | |
4210 | ||
4211 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
4212 | ||
4213 | return 0; | |
4214 | } | |
4215 | ||
4216 | /* De-initialize device specific data. | |
4217 | * Caller must hold rtnl_lock. | |
4218 | */ | |
a77b5325 | 4219 | void bond_deinit(struct net_device *bond_dev) |
1da177e4 LT |
4220 | { |
4221 | struct bonding *bond = bond_dev->priv; | |
4222 | ||
4223 | list_del(&bond->bond_list); | |
4224 | ||
4225 | #ifdef CONFIG_PROC_FS | |
4226 | bond_remove_proc_entry(bond); | |
4227 | #endif | |
4228 | } | |
4229 | ||
4230 | /* Unregister and free all bond devices. | |
4231 | * Caller must hold rtnl_lock. | |
4232 | */ | |
4233 | static void bond_free_all(void) | |
4234 | { | |
4235 | struct bonding *bond, *nxt; | |
4236 | ||
4237 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4238 | struct net_device *bond_dev = bond->dev; | |
4239 | ||
4240 | unregister_netdevice(bond_dev); | |
4241 | bond_deinit(bond_dev); | |
4242 | } | |
4243 | ||
4244 | #ifdef CONFIG_PROC_FS | |
4245 | bond_destroy_proc_dir(); | |
4246 | #endif | |
4247 | } | |
4248 | ||
4249 | /*------------------------- Module initialization ---------------------------*/ | |
4250 | ||
4251 | /* | |
4252 | * Convert string input module parms. Accept either the | |
4253 | * number of the mode or its string name. | |
4254 | */ | |
a77b5325 | 4255 | int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) |
1da177e4 LT |
4256 | { |
4257 | int i; | |
4258 | ||
4259 | for (i = 0; tbl[i].modename; i++) { | |
4260 | if ((isdigit(*mode_arg) && | |
4261 | tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || | |
4262 | (strncmp(mode_arg, tbl[i].modename, | |
4263 | strlen(tbl[i].modename)) == 0)) { | |
4264 | return tbl[i].mode; | |
4265 | } | |
4266 | } | |
4267 | ||
4268 | return -1; | |
4269 | } | |
4270 | ||
4271 | static int bond_check_params(struct bond_params *params) | |
4272 | { | |
4273 | /* | |
4274 | * Convert string parameters. | |
4275 | */ | |
4276 | if (mode) { | |
4277 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4278 | if (bond_mode == -1) { | |
4279 | printk(KERN_ERR DRV_NAME | |
4280 | ": Error: Invalid bonding mode \"%s\"\n", | |
4281 | mode == NULL ? "NULL" : mode); | |
4282 | return -EINVAL; | |
4283 | } | |
4284 | } | |
4285 | ||
169a3e66 JV |
4286 | if (xmit_hash_policy) { |
4287 | if ((bond_mode != BOND_MODE_XOR) && | |
4288 | (bond_mode != BOND_MODE_8023AD)) { | |
4289 | printk(KERN_INFO DRV_NAME | |
4290 | ": xor_mode param is irrelevant in mode %s\n", | |
4291 | bond_mode_name(bond_mode)); | |
4292 | } else { | |
4293 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4294 | xmit_hashtype_tbl); | |
4295 | if (xmit_hashtype == -1) { | |
4296 | printk(KERN_ERR DRV_NAME | |
4297 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4298 | xmit_hash_policy == NULL ? "NULL" : | |
4299 | xmit_hash_policy); | |
4300 | return -EINVAL; | |
4301 | } | |
4302 | } | |
4303 | } | |
4304 | ||
1da177e4 LT |
4305 | if (lacp_rate) { |
4306 | if (bond_mode != BOND_MODE_8023AD) { | |
4307 | printk(KERN_INFO DRV_NAME | |
4308 | ": lacp_rate param is irrelevant in mode %s\n", | |
4309 | bond_mode_name(bond_mode)); | |
4310 | } else { | |
4311 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4312 | if (lacp_fast == -1) { | |
4313 | printk(KERN_ERR DRV_NAME | |
4314 | ": Error: Invalid lacp rate \"%s\"\n", | |
4315 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4316 | return -EINVAL; | |
4317 | } | |
4318 | } | |
4319 | } | |
4320 | ||
4321 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4322 | printk(KERN_WARNING DRV_NAME | |
4323 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4e0952c7 | 4324 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
1da177e4 LT |
4325 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
4326 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4327 | } | |
4328 | ||
4329 | if (miimon < 0) { | |
4330 | printk(KERN_WARNING DRV_NAME | |
4331 | ": Warning: miimon module parameter (%d), " | |
4332 | "not in range 0-%d, so it was reset to %d\n", | |
4333 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4334 | miimon = BOND_LINK_MON_INTERV; | |
4335 | } | |
4336 | ||
4337 | if (updelay < 0) { | |
4338 | printk(KERN_WARNING DRV_NAME | |
4339 | ": Warning: updelay module parameter (%d), " | |
4340 | "not in range 0-%d, so it was reset to 0\n", | |
4341 | updelay, INT_MAX); | |
4342 | updelay = 0; | |
4343 | } | |
4344 | ||
4345 | if (downdelay < 0) { | |
4346 | printk(KERN_WARNING DRV_NAME | |
4347 | ": Warning: downdelay module parameter (%d), " | |
4348 | "not in range 0-%d, so it was reset to 0\n", | |
4349 | downdelay, INT_MAX); | |
4350 | downdelay = 0; | |
4351 | } | |
4352 | ||
4353 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4354 | printk(KERN_WARNING DRV_NAME | |
4355 | ": Warning: use_carrier module parameter (%d), " | |
4356 | "not of valid value (0/1), so it was set to 1\n", | |
4357 | use_carrier); | |
4358 | use_carrier = 1; | |
4359 | } | |
4360 | ||
4361 | /* reset values for 802.3ad */ | |
4362 | if (bond_mode == BOND_MODE_8023AD) { | |
4363 | if (!miimon) { | |
4364 | printk(KERN_WARNING DRV_NAME | |
4365 | ": Warning: miimon must be specified, " | |
4366 | "otherwise bonding will not detect link " | |
4367 | "failure, speed and duplex which are " | |
4368 | "essential for 802.3ad operation\n"); | |
4369 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4370 | miimon = 100; | |
4371 | } | |
4372 | } | |
4373 | ||
4374 | /* reset values for TLB/ALB */ | |
4375 | if ((bond_mode == BOND_MODE_TLB) || | |
4376 | (bond_mode == BOND_MODE_ALB)) { | |
4377 | if (!miimon) { | |
4378 | printk(KERN_WARNING DRV_NAME | |
4379 | ": Warning: miimon must be specified, " | |
4380 | "otherwise bonding will not detect link " | |
4381 | "failure and link speed which are essential " | |
4382 | "for TLB/ALB load balancing\n"); | |
4383 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4384 | miimon = 100; | |
4385 | } | |
4386 | } | |
4387 | ||
4388 | if (bond_mode == BOND_MODE_ALB) { | |
4389 | printk(KERN_NOTICE DRV_NAME | |
4390 | ": In ALB mode you might experience client " | |
4391 | "disconnections upon reconnection of a link if the " | |
4392 | "bonding module updelay parameter (%d msec) is " | |
4393 | "incompatible with the forwarding delay time of the " | |
4394 | "switch\n", | |
4395 | updelay); | |
4396 | } | |
4397 | ||
4398 | if (!miimon) { | |
4399 | if (updelay || downdelay) { | |
4400 | /* just warn the user the up/down delay will have | |
4401 | * no effect since miimon is zero... | |
4402 | */ | |
4403 | printk(KERN_WARNING DRV_NAME | |
4404 | ": Warning: miimon module parameter not set " | |
4405 | "and updelay (%d) or downdelay (%d) module " | |
4406 | "parameter is set; updelay and downdelay have " | |
4407 | "no effect unless miimon is set\n", | |
4408 | updelay, downdelay); | |
4409 | } | |
4410 | } else { | |
4411 | /* don't allow arp monitoring */ | |
4412 | if (arp_interval) { | |
4413 | printk(KERN_WARNING DRV_NAME | |
4414 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4415 | "can't be used simultaneously, disabling ARP " | |
4416 | "monitoring\n", | |
4417 | miimon, arp_interval); | |
4418 | arp_interval = 0; | |
4419 | } | |
4420 | ||
4421 | if ((updelay % miimon) != 0) { | |
4422 | printk(KERN_WARNING DRV_NAME | |
4423 | ": Warning: updelay (%d) is not a multiple " | |
4424 | "of miimon (%d), updelay rounded to %d ms\n", | |
4425 | updelay, miimon, (updelay / miimon) * miimon); | |
4426 | } | |
4427 | ||
4428 | updelay /= miimon; | |
4429 | ||
4430 | if ((downdelay % miimon) != 0) { | |
4431 | printk(KERN_WARNING DRV_NAME | |
4432 | ": Warning: downdelay (%d) is not a multiple " | |
4433 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4434 | downdelay, miimon, | |
4435 | (downdelay / miimon) * miimon); | |
4436 | } | |
4437 | ||
4438 | downdelay /= miimon; | |
4439 | } | |
4440 | ||
4441 | if (arp_interval < 0) { | |
4442 | printk(KERN_WARNING DRV_NAME | |
4443 | ": Warning: arp_interval module parameter (%d) " | |
4444 | ", not in range 0-%d, so it was reset to %d\n", | |
4445 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4446 | arp_interval = BOND_LINK_ARP_INTERV; | |
4447 | } | |
4448 | ||
4449 | for (arp_ip_count = 0; | |
4450 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4451 | arp_ip_count++) { | |
4452 | /* not complete check, but should be good enough to | |
4453 | catch mistakes */ | |
4454 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4455 | printk(KERN_WARNING DRV_NAME | |
4456 | ": Warning: bad arp_ip_target module parameter " | |
4457 | "(%s), ARP monitoring will not be performed\n", | |
4458 | arp_ip_target[arp_ip_count]); | |
4459 | arp_interval = 0; | |
4460 | } else { | |
4461 | u32 ip = in_aton(arp_ip_target[arp_ip_count]); | |
4462 | arp_target[arp_ip_count] = ip; | |
4463 | } | |
4464 | } | |
4465 | ||
4466 | if (arp_interval && !arp_ip_count) { | |
4467 | /* don't allow arping if no arp_ip_target given... */ | |
4468 | printk(KERN_WARNING DRV_NAME | |
4469 | ": Warning: arp_interval module parameter (%d) " | |
4470 | "specified without providing an arp_ip_target " | |
4471 | "parameter, arp_interval was reset to 0\n", | |
4472 | arp_interval); | |
4473 | arp_interval = 0; | |
4474 | } | |
4475 | ||
4476 | if (miimon) { | |
4477 | printk(KERN_INFO DRV_NAME | |
4478 | ": MII link monitoring set to %d ms\n", | |
4479 | miimon); | |
4480 | } else if (arp_interval) { | |
4481 | int i; | |
4482 | ||
4483 | printk(KERN_INFO DRV_NAME | |
4484 | ": ARP monitoring set to %d ms with %d target(s):", | |
4485 | arp_interval, arp_ip_count); | |
4486 | ||
4487 | for (i = 0; i < arp_ip_count; i++) | |
4488 | printk (" %s", arp_ip_target[i]); | |
4489 | ||
4490 | printk("\n"); | |
4491 | ||
4492 | } else { | |
4493 | /* miimon and arp_interval not set, we need one so things | |
4494 | * work as expected, see bonding.txt for details | |
4495 | */ | |
4496 | printk(KERN_WARNING DRV_NAME | |
4497 | ": Warning: either miimon or arp_interval and " | |
4498 | "arp_ip_target module parameters must be specified, " | |
4499 | "otherwise bonding will not detect link failures! see " | |
4500 | "bonding.txt for details.\n"); | |
4501 | } | |
4502 | ||
4503 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4504 | /* currently, using a primary only makes sense | |
4505 | * in active backup, TLB or ALB modes | |
4506 | */ | |
4507 | printk(KERN_WARNING DRV_NAME | |
4508 | ": Warning: %s primary device specified but has no " | |
4509 | "effect in %s mode\n", | |
4510 | primary, bond_mode_name(bond_mode)); | |
4511 | primary = NULL; | |
4512 | } | |
4513 | ||
4514 | /* fill params struct with the proper values */ | |
4515 | params->mode = bond_mode; | |
169a3e66 | 4516 | params->xmit_policy = xmit_hashtype; |
1da177e4 LT |
4517 | params->miimon = miimon; |
4518 | params->arp_interval = arp_interval; | |
4519 | params->updelay = updelay; | |
4520 | params->downdelay = downdelay; | |
4521 | params->use_carrier = use_carrier; | |
4522 | params->lacp_fast = lacp_fast; | |
4523 | params->primary[0] = 0; | |
4524 | ||
4525 | if (primary) { | |
4526 | strncpy(params->primary, primary, IFNAMSIZ); | |
4527 | params->primary[IFNAMSIZ - 1] = 0; | |
4528 | } | |
4529 | ||
4530 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4531 | ||
4532 | return 0; | |
4533 | } | |
4534 | ||
dfe60397 MW |
4535 | /* Create a new bond based on the specified name and bonding parameters. |
4536 | * Caller must NOT hold rtnl_lock; we need to release it here before we | |
4537 | * set up our sysfs entries. | |
4538 | */ | |
4539 | int bond_create(char *name, struct bond_params *params, struct bonding **newbond) | |
4540 | { | |
4541 | struct net_device *bond_dev; | |
4542 | int res; | |
4543 | ||
4544 | rtnl_lock(); | |
4545 | bond_dev = alloc_netdev(sizeof(struct bonding), name, ether_setup); | |
4546 | if (!bond_dev) { | |
4547 | printk(KERN_ERR DRV_NAME | |
4548 | ": %s: eek! can't alloc netdev!\n", | |
4549 | name); | |
4550 | res = -ENOMEM; | |
4551 | goto out_rtnl; | |
4552 | } | |
4553 | ||
4554 | /* bond_init() must be called after dev_alloc_name() (for the | |
4555 | * /proc files), but before register_netdevice(), because we | |
4556 | * need to set function pointers. | |
4557 | */ | |
4558 | ||
4559 | res = bond_init(bond_dev, params); | |
4560 | if (res < 0) { | |
4561 | goto out_netdev; | |
4562 | } | |
4563 | ||
4564 | SET_MODULE_OWNER(bond_dev); | |
4565 | ||
4566 | res = register_netdevice(bond_dev); | |
4567 | if (res < 0) { | |
4568 | goto out_bond; | |
4569 | } | |
4570 | if (newbond) | |
4571 | *newbond = bond_dev->priv; | |
4572 | ||
ff59c456 JV |
4573 | netif_carrier_off(bond_dev); |
4574 | ||
dfe60397 | 4575 | rtnl_unlock(); /* allows sysfs registration of net device */ |
b76cdba9 | 4576 | res = bond_create_sysfs_entry(bond_dev->priv); |
dfe60397 MW |
4577 | goto done; |
4578 | out_bond: | |
4579 | bond_deinit(bond_dev); | |
4580 | out_netdev: | |
4581 | free_netdev(bond_dev); | |
4582 | out_rtnl: | |
4583 | rtnl_unlock(); | |
4584 | done: | |
4585 | return res; | |
4586 | } | |
4587 | ||
1da177e4 LT |
4588 | static int __init bonding_init(void) |
4589 | { | |
1da177e4 LT |
4590 | int i; |
4591 | int res; | |
dfe60397 | 4592 | char new_bond_name[8]; /* Enough room for 999 bonds at init. */ |
1da177e4 LT |
4593 | |
4594 | printk(KERN_INFO "%s", version); | |
4595 | ||
dfe60397 | 4596 | res = bond_check_params(&bonding_defaults); |
1da177e4 | 4597 | if (res) { |
dfe60397 | 4598 | goto out; |
1da177e4 LT |
4599 | } |
4600 | ||
1da177e4 LT |
4601 | #ifdef CONFIG_PROC_FS |
4602 | bond_create_proc_dir(); | |
4603 | #endif | |
1da177e4 | 4604 | for (i = 0; i < max_bonds; i++) { |
dfe60397 MW |
4605 | sprintf(new_bond_name, "bond%d",i); |
4606 | res = bond_create(new_bond_name,&bonding_defaults, NULL); | |
4607 | if (res) | |
4608 | goto err; | |
1da177e4 LT |
4609 | } |
4610 | ||
b76cdba9 MW |
4611 | res = bond_create_sysfs(); |
4612 | if (res) | |
4613 | goto err; | |
4614 | ||
1da177e4 | 4615 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4616 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4617 | |
dfe60397 MW |
4618 | goto out; |
4619 | err: | |
40abc270 | 4620 | rtnl_lock(); |
1da177e4 | 4621 | bond_free_all(); |
b76cdba9 | 4622 | bond_destroy_sysfs(); |
1da177e4 | 4623 | rtnl_unlock(); |
dfe60397 | 4624 | out: |
1da177e4 | 4625 | return res; |
dfe60397 | 4626 | |
1da177e4 LT |
4627 | } |
4628 | ||
4629 | static void __exit bonding_exit(void) | |
4630 | { | |
4631 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4632 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 LT |
4633 | |
4634 | rtnl_lock(); | |
4635 | bond_free_all(); | |
b76cdba9 | 4636 | bond_destroy_sysfs(); |
1da177e4 LT |
4637 | rtnl_unlock(); |
4638 | } | |
4639 | ||
4640 | module_init(bonding_init); | |
4641 | module_exit(bonding_exit); | |
4642 | MODULE_LICENSE("GPL"); | |
4643 | MODULE_VERSION(DRV_VERSION); | |
4644 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4645 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
4646 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
4647 | ||
4648 | /* | |
4649 | * Local variables: | |
4650 | * c-indent-level: 8 | |
4651 | * c-basic-offset: 8 | |
4652 | * tab-width: 8 | |
4653 | * End: | |
4654 | */ | |
4655 |