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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, }; | |
f5b2b966 | 99 | static char *arp_validate = NULL; |
12479f9a | 100 | struct bond_params bonding_defaults; |
1da177e4 LT |
101 | |
102 | module_param(max_bonds, int, 0); | |
103 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
104 | module_param(miimon, int, 0); | |
105 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
106 | module_param(updelay, int, 0); | |
107 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
108 | module_param(downdelay, int, 0); | |
2ac47660 MW |
109 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
110 | "in milliseconds"); | |
1da177e4 | 111 | module_param(use_carrier, int, 0); |
2ac47660 MW |
112 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
113 | "0 for off, 1 for on (default)"); | |
1da177e4 | 114 | module_param(mode, charp, 0); |
2ac47660 MW |
115 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
116 | "1 for active-backup, 2 for balance-xor, " | |
117 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
118 | "6 for balance-alb"); | |
1da177e4 LT |
119 | module_param(primary, charp, 0); |
120 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
121 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
122 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
123 | "(slow/fast)"); | |
169a3e66 | 124 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
125 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
126 | ", 1 for layer 3+4"); | |
1da177e4 LT |
127 | module_param(arp_interval, int, 0); |
128 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
129 | module_param_array(arp_ip_target, charp, NULL, 0); | |
130 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
131 | module_param(arp_validate, charp, 0); |
132 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
1da177e4 LT |
133 | |
134 | /*----------------------------- Global variables ----------------------------*/ | |
135 | ||
f71e1309 | 136 | static const char * const version = |
1da177e4 LT |
137 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
138 | ||
12479f9a | 139 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
140 | |
141 | #ifdef CONFIG_PROC_FS | |
142 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
143 | #endif | |
144 | ||
b76cdba9 | 145 | extern struct rw_semaphore bonding_rwsem; |
1da177e4 LT |
146 | static u32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; |
147 | static int arp_ip_count = 0; | |
1da177e4 | 148 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
169a3e66 | 149 | static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; |
1da177e4 | 150 | static int lacp_fast = 0; |
217df670 | 151 | |
1da177e4 | 152 | |
12479f9a | 153 | struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
154 | { "slow", AD_LACP_SLOW}, |
155 | { "fast", AD_LACP_FAST}, | |
156 | { NULL, -1}, | |
157 | }; | |
158 | ||
12479f9a | 159 | struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
160 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
161 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
162 | { "balance-xor", BOND_MODE_XOR}, | |
163 | { "broadcast", BOND_MODE_BROADCAST}, | |
164 | { "802.3ad", BOND_MODE_8023AD}, | |
165 | { "balance-tlb", BOND_MODE_TLB}, | |
166 | { "balance-alb", BOND_MODE_ALB}, | |
167 | { NULL, -1}, | |
168 | }; | |
169 | ||
12479f9a | 170 | struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
171 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
172 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
173 | { NULL, -1}, | |
174 | }; | |
175 | ||
f5b2b966 JV |
176 | struct bond_parm_tbl arp_validate_tbl[] = { |
177 | { "none", BOND_ARP_VALIDATE_NONE}, | |
178 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
179 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
180 | { "all", BOND_ARP_VALIDATE_ALL}, | |
181 | { NULL, -1}, | |
182 | }; | |
183 | ||
1da177e4 LT |
184 | /*-------------------------- Forward declarations ---------------------------*/ |
185 | ||
c3ade5ca | 186 | static void bond_send_gratuitous_arp(struct bonding *bond); |
1da177e4 LT |
187 | |
188 | /*---------------------------- General routines -----------------------------*/ | |
189 | ||
a77b5325 | 190 | const char *bond_mode_name(int mode) |
1da177e4 LT |
191 | { |
192 | switch (mode) { | |
193 | case BOND_MODE_ROUNDROBIN : | |
194 | return "load balancing (round-robin)"; | |
195 | case BOND_MODE_ACTIVEBACKUP : | |
196 | return "fault-tolerance (active-backup)"; | |
197 | case BOND_MODE_XOR : | |
198 | return "load balancing (xor)"; | |
199 | case BOND_MODE_BROADCAST : | |
200 | return "fault-tolerance (broadcast)"; | |
201 | case BOND_MODE_8023AD: | |
202 | return "IEEE 802.3ad Dynamic link aggregation"; | |
203 | case BOND_MODE_TLB: | |
204 | return "transmit load balancing"; | |
205 | case BOND_MODE_ALB: | |
206 | return "adaptive load balancing"; | |
207 | default: | |
208 | return "unknown"; | |
209 | } | |
210 | } | |
211 | ||
212 | /*---------------------------------- VLAN -----------------------------------*/ | |
213 | ||
214 | /** | |
215 | * bond_add_vlan - add a new vlan id on bond | |
216 | * @bond: bond that got the notification | |
217 | * @vlan_id: the vlan id to add | |
218 | * | |
219 | * Returns -ENOMEM if allocation failed. | |
220 | */ | |
221 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
222 | { | |
223 | struct vlan_entry *vlan; | |
224 | ||
225 | dprintk("bond: %s, vlan id %d\n", | |
226 | (bond ? bond->dev->name: "None"), vlan_id); | |
227 | ||
228 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
229 | if (!vlan) { | |
230 | return -ENOMEM; | |
231 | } | |
232 | ||
233 | INIT_LIST_HEAD(&vlan->vlan_list); | |
234 | vlan->vlan_id = vlan_id; | |
c3ade5ca | 235 | vlan->vlan_ip = 0; |
1da177e4 LT |
236 | |
237 | write_lock_bh(&bond->lock); | |
238 | ||
239 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
240 | ||
241 | write_unlock_bh(&bond->lock); | |
242 | ||
243 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | /** | |
249 | * bond_del_vlan - delete a vlan id from bond | |
250 | * @bond: bond that got the notification | |
251 | * @vlan_id: the vlan id to delete | |
252 | * | |
253 | * returns -ENODEV if @vlan_id was not found in @bond. | |
254 | */ | |
255 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
256 | { | |
257 | struct vlan_entry *vlan, *next; | |
258 | int res = -ENODEV; | |
259 | ||
260 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
261 | ||
262 | write_lock_bh(&bond->lock); | |
263 | ||
264 | list_for_each_entry_safe(vlan, next, &bond->vlan_list, vlan_list) { | |
265 | if (vlan->vlan_id == vlan_id) { | |
266 | list_del(&vlan->vlan_list); | |
267 | ||
268 | if ((bond->params.mode == BOND_MODE_TLB) || | |
269 | (bond->params.mode == BOND_MODE_ALB)) { | |
270 | bond_alb_clear_vlan(bond, vlan_id); | |
271 | } | |
272 | ||
273 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
274 | bond->dev->name); | |
275 | ||
276 | kfree(vlan); | |
277 | ||
278 | if (list_empty(&bond->vlan_list) && | |
279 | (bond->slave_cnt == 0)) { | |
280 | /* Last VLAN removed and no slaves, so | |
281 | * restore block on adding VLANs. This will | |
282 | * be removed once new slaves that are not | |
283 | * VLAN challenged will be added. | |
284 | */ | |
285 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
286 | } | |
287 | ||
288 | res = 0; | |
289 | goto out; | |
290 | } | |
291 | } | |
292 | ||
293 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
294 | bond->dev->name); | |
295 | ||
296 | out: | |
297 | write_unlock_bh(&bond->lock); | |
298 | return res; | |
299 | } | |
300 | ||
301 | /** | |
302 | * bond_has_challenged_slaves | |
303 | * @bond: the bond we're working on | |
304 | * | |
305 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
306 | * was found, 0 otherwise. | |
307 | * | |
308 | * Assumes bond->lock is held. | |
309 | */ | |
310 | static int bond_has_challenged_slaves(struct bonding *bond) | |
311 | { | |
312 | struct slave *slave; | |
313 | int i; | |
314 | ||
315 | bond_for_each_slave(bond, slave, i) { | |
316 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
317 | dprintk("found VLAN challenged slave - %s\n", | |
318 | slave->dev->name); | |
319 | return 1; | |
320 | } | |
321 | } | |
322 | ||
323 | dprintk("no VLAN challenged slaves found\n"); | |
324 | return 0; | |
325 | } | |
326 | ||
327 | /** | |
328 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
329 | * @bond: the bond we're working on | |
330 | * @curr: item we're advancing from | |
331 | * | |
332 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
333 | * or @curr->next otherwise (even if it is @curr itself again). | |
334 | * | |
335 | * Caller must hold bond->lock | |
336 | */ | |
337 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
338 | { | |
339 | struct vlan_entry *next, *last; | |
340 | ||
341 | if (list_empty(&bond->vlan_list)) { | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | if (!curr) { | |
346 | next = list_entry(bond->vlan_list.next, | |
347 | struct vlan_entry, vlan_list); | |
348 | } else { | |
349 | last = list_entry(bond->vlan_list.prev, | |
350 | struct vlan_entry, vlan_list); | |
351 | if (last == curr) { | |
352 | next = list_entry(bond->vlan_list.next, | |
353 | struct vlan_entry, vlan_list); | |
354 | } else { | |
355 | next = list_entry(curr->vlan_list.next, | |
356 | struct vlan_entry, vlan_list); | |
357 | } | |
358 | } | |
359 | ||
360 | return next; | |
361 | } | |
362 | ||
363 | /** | |
364 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
365 | * | |
366 | * @bond: bond device that got this skb for tx. | |
367 | * @skb: hw accel VLAN tagged skb to transmit | |
368 | * @slave_dev: slave that is supposed to xmit this skbuff | |
369 | * | |
370 | * When the bond gets an skb to transmit that is | |
371 | * already hardware accelerated VLAN tagged, and it | |
372 | * needs to relay this skb to a slave that is not | |
373 | * hw accel capable, the skb needs to be "unaccelerated", | |
374 | * i.e. strip the hwaccel tag and re-insert it as part | |
375 | * of the payload. | |
376 | */ | |
377 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
378 | { | |
379 | unsigned short vlan_id; | |
380 | ||
381 | if (!list_empty(&bond->vlan_list) && | |
382 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
383 | vlan_get_tag(skb, &vlan_id) == 0) { | |
384 | skb->dev = slave_dev; | |
385 | skb = vlan_put_tag(skb, vlan_id); | |
386 | if (!skb) { | |
387 | /* vlan_put_tag() frees the skb in case of error, | |
388 | * so return success here so the calling functions | |
389 | * won't attempt to free is again. | |
390 | */ | |
391 | return 0; | |
392 | } | |
393 | } else { | |
394 | skb->dev = slave_dev; | |
395 | } | |
396 | ||
397 | skb->priority = 1; | |
398 | dev_queue_xmit(skb); | |
399 | ||
400 | return 0; | |
401 | } | |
402 | ||
403 | /* | |
404 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
405 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
406 | * lock because: | |
407 | * a. This operation is performed in IOCTL context, | |
408 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
409 | * c. Holding a lock with BH disabled while directly calling a base driver | |
410 | * entry point is generally a BAD idea. | |
411 | * | |
412 | * The design of synchronization/protection for this operation in the 8021q | |
413 | * module is good for one or more VLAN devices over a single physical device | |
414 | * and cannot be extended for a teaming solution like bonding, so there is a | |
415 | * potential race condition here where a net device from the vlan group might | |
416 | * be referenced (either by a base driver or the 8021q code) while it is being | |
417 | * removed from the system. However, it turns out we're not making matters | |
418 | * worse, and if it works for regular VLAN usage it will work here too. | |
419 | */ | |
420 | ||
421 | /** | |
422 | * bond_vlan_rx_register - Propagates registration to slaves | |
423 | * @bond_dev: bonding net device that got called | |
424 | * @grp: vlan group being registered | |
425 | */ | |
426 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
427 | { | |
428 | struct bonding *bond = bond_dev->priv; | |
429 | struct slave *slave; | |
430 | int i; | |
431 | ||
432 | bond->vlgrp = grp; | |
433 | ||
434 | bond_for_each_slave(bond, slave, i) { | |
435 | struct net_device *slave_dev = slave->dev; | |
436 | ||
437 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
438 | slave_dev->vlan_rx_register) { | |
439 | slave_dev->vlan_rx_register(slave_dev, grp); | |
440 | } | |
441 | } | |
442 | } | |
443 | ||
444 | /** | |
445 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
446 | * @bond_dev: bonding net device that got called | |
447 | * @vid: vlan id being added | |
448 | */ | |
449 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
450 | { | |
451 | struct bonding *bond = bond_dev->priv; | |
452 | struct slave *slave; | |
453 | int i, res; | |
454 | ||
455 | bond_for_each_slave(bond, slave, i) { | |
456 | struct net_device *slave_dev = slave->dev; | |
457 | ||
458 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
459 | slave_dev->vlan_rx_add_vid) { | |
460 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
461 | } | |
462 | } | |
463 | ||
464 | res = bond_add_vlan(bond, vid); | |
465 | if (res) { | |
466 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 467 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
468 | bond_dev->name, vid); |
469 | } | |
470 | } | |
471 | ||
472 | /** | |
473 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
474 | * @bond_dev: bonding net device that got called | |
475 | * @vid: vlan id being removed | |
476 | */ | |
477 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
478 | { | |
479 | struct bonding *bond = bond_dev->priv; | |
480 | struct slave *slave; | |
481 | struct net_device *vlan_dev; | |
482 | int i, res; | |
483 | ||
484 | bond_for_each_slave(bond, slave, i) { | |
485 | struct net_device *slave_dev = slave->dev; | |
486 | ||
487 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
488 | slave_dev->vlan_rx_kill_vid) { | |
489 | /* Save and then restore vlan_dev in the grp array, | |
490 | * since the slave's driver might clear it. | |
491 | */ | |
492 | vlan_dev = bond->vlgrp->vlan_devices[vid]; | |
493 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); | |
494 | bond->vlgrp->vlan_devices[vid] = vlan_dev; | |
495 | } | |
496 | } | |
497 | ||
498 | res = bond_del_vlan(bond, vid); | |
499 | if (res) { | |
500 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 501 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
502 | bond_dev->name, vid); |
503 | } | |
504 | } | |
505 | ||
506 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
507 | { | |
508 | struct vlan_entry *vlan; | |
509 | ||
510 | write_lock_bh(&bond->lock); | |
511 | ||
512 | if (list_empty(&bond->vlan_list)) { | |
513 | goto out; | |
514 | } | |
515 | ||
516 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
517 | slave_dev->vlan_rx_register) { | |
518 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
519 | } | |
520 | ||
521 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
522 | !(slave_dev->vlan_rx_add_vid)) { | |
523 | goto out; | |
524 | } | |
525 | ||
526 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
527 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
528 | } | |
529 | ||
530 | out: | |
531 | write_unlock_bh(&bond->lock); | |
532 | } | |
533 | ||
534 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
535 | { | |
536 | struct vlan_entry *vlan; | |
537 | struct net_device *vlan_dev; | |
538 | ||
539 | write_lock_bh(&bond->lock); | |
540 | ||
541 | if (list_empty(&bond->vlan_list)) { | |
542 | goto out; | |
543 | } | |
544 | ||
545 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
546 | !(slave_dev->vlan_rx_kill_vid)) { | |
547 | goto unreg; | |
548 | } | |
549 | ||
550 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
551 | /* Save and then restore vlan_dev in the grp array, | |
552 | * since the slave's driver might clear it. | |
553 | */ | |
554 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
555 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); | |
556 | bond->vlgrp->vlan_devices[vlan->vlan_id] = vlan_dev; | |
557 | } | |
558 | ||
559 | unreg: | |
560 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
561 | slave_dev->vlan_rx_register) { | |
562 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
563 | } | |
564 | ||
565 | out: | |
566 | write_unlock_bh(&bond->lock); | |
567 | } | |
568 | ||
569 | /*------------------------------- Link status -------------------------------*/ | |
570 | ||
ff59c456 JV |
571 | /* |
572 | * Set the carrier state for the master according to the state of its | |
573 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
574 | * do special 802.3ad magic. | |
575 | * | |
576 | * Returns zero if carrier state does not change, nonzero if it does. | |
577 | */ | |
578 | static int bond_set_carrier(struct bonding *bond) | |
579 | { | |
580 | struct slave *slave; | |
581 | int i; | |
582 | ||
583 | if (bond->slave_cnt == 0) | |
584 | goto down; | |
585 | ||
586 | if (bond->params.mode == BOND_MODE_8023AD) | |
587 | return bond_3ad_set_carrier(bond); | |
588 | ||
589 | bond_for_each_slave(bond, slave, i) { | |
590 | if (slave->link == BOND_LINK_UP) { | |
591 | if (!netif_carrier_ok(bond->dev)) { | |
592 | netif_carrier_on(bond->dev); | |
593 | return 1; | |
594 | } | |
595 | return 0; | |
596 | } | |
597 | } | |
598 | ||
599 | down: | |
600 | if (netif_carrier_ok(bond->dev)) { | |
601 | netif_carrier_off(bond->dev); | |
602 | return 1; | |
603 | } | |
604 | return 0; | |
605 | } | |
606 | ||
1da177e4 LT |
607 | /* |
608 | * Get link speed and duplex from the slave's base driver | |
609 | * using ethtool. If for some reason the call fails or the | |
610 | * values are invalid, fake speed and duplex to 100/Full | |
611 | * and return error. | |
612 | */ | |
613 | static int bond_update_speed_duplex(struct slave *slave) | |
614 | { | |
615 | struct net_device *slave_dev = slave->dev; | |
616 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
617 | struct ifreq ifr; | |
618 | struct ethtool_cmd etool; | |
619 | ||
620 | /* Fake speed and duplex */ | |
621 | slave->speed = SPEED_100; | |
622 | slave->duplex = DUPLEX_FULL; | |
623 | ||
624 | if (slave_dev->ethtool_ops) { | |
6a986ce4 | 625 | int res; |
1da177e4 LT |
626 | |
627 | if (!slave_dev->ethtool_ops->get_settings) { | |
628 | return -1; | |
629 | } | |
630 | ||
631 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); | |
632 | if (res < 0) { | |
633 | return -1; | |
634 | } | |
635 | ||
636 | goto verify; | |
637 | } | |
638 | ||
639 | ioctl = slave_dev->do_ioctl; | |
640 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
641 | etool.cmd = ETHTOOL_GSET; | |
642 | ifr.ifr_data = (char*)&etool; | |
643 | if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) { | |
644 | return -1; | |
645 | } | |
646 | ||
647 | verify: | |
648 | switch (etool.speed) { | |
649 | case SPEED_10: | |
650 | case SPEED_100: | |
651 | case SPEED_1000: | |
94dbffd5 | 652 | case SPEED_10000: |
1da177e4 LT |
653 | break; |
654 | default: | |
655 | return -1; | |
656 | } | |
657 | ||
658 | switch (etool.duplex) { | |
659 | case DUPLEX_FULL: | |
660 | case DUPLEX_HALF: | |
661 | break; | |
662 | default: | |
663 | return -1; | |
664 | } | |
665 | ||
666 | slave->speed = etool.speed; | |
667 | slave->duplex = etool.duplex; | |
668 | ||
669 | return 0; | |
670 | } | |
671 | ||
672 | /* | |
673 | * if <dev> supports MII link status reporting, check its link status. | |
674 | * | |
675 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
676 | * depening upon the setting of the use_carrier parameter. | |
677 | * | |
678 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
679 | * can't tell and just pretend it is), or 0, meaning that the link is | |
680 | * down. | |
681 | * | |
682 | * If reporting is non-zero, instead of faking link up, return -1 if | |
683 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
684 | * support them). If use_carrier is set, return whatever it says. | |
685 | * It'd be nice if there was a good way to tell if a driver supports | |
686 | * netif_carrier, but there really isn't. | |
687 | */ | |
688 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
689 | { | |
690 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
691 | struct ifreq ifr; | |
692 | struct mii_ioctl_data *mii; | |
693 | struct ethtool_value etool; | |
694 | ||
695 | if (bond->params.use_carrier) { | |
696 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
697 | } | |
698 | ||
699 | ioctl = slave_dev->do_ioctl; | |
700 | if (ioctl) { | |
701 | /* TODO: set pointer to correct ioctl on a per team member */ | |
702 | /* bases to make this more efficient. that is, once */ | |
703 | /* we determine the correct ioctl, we will always */ | |
704 | /* call it and not the others for that team */ | |
705 | /* member. */ | |
706 | ||
707 | /* | |
708 | * We cannot assume that SIOCGMIIPHY will also read a | |
709 | * register; not all network drivers (e.g., e100) | |
710 | * support that. | |
711 | */ | |
712 | ||
713 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
714 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
715 | mii = if_mii(&ifr); | |
716 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
717 | mii->reg_num = MII_BMSR; | |
718 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
719 | return (mii->val_out & BMSR_LSTATUS); | |
720 | } | |
721 | } | |
722 | } | |
723 | ||
724 | /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */ | |
725 | /* for a period of time so we attempt to get link status */ | |
726 | /* from it last if the above MII ioctls fail... */ | |
727 | if (slave_dev->ethtool_ops) { | |
728 | if (slave_dev->ethtool_ops->get_link) { | |
729 | u32 link; | |
730 | ||
731 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
732 | ||
733 | return link ? BMSR_LSTATUS : 0; | |
734 | } | |
735 | } | |
736 | ||
737 | if (ioctl) { | |
738 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
739 | etool.cmd = ETHTOOL_GLINK; | |
740 | ifr.ifr_data = (char*)&etool; | |
741 | if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) { | |
742 | if (etool.data == 1) { | |
743 | return BMSR_LSTATUS; | |
744 | } else { | |
745 | dprintk("SIOCETHTOOL shows link down\n"); | |
746 | return 0; | |
747 | } | |
748 | } | |
749 | } | |
750 | ||
751 | /* | |
752 | * If reporting, report that either there's no dev->do_ioctl, | |
753 | * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we | |
754 | * cannot report link status). If not reporting, pretend | |
755 | * we're ok. | |
756 | */ | |
757 | return (reporting ? -1 : BMSR_LSTATUS); | |
758 | } | |
759 | ||
760 | /*----------------------------- Multicast list ------------------------------*/ | |
761 | ||
762 | /* | |
763 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
764 | */ | |
765 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
766 | { | |
767 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
768 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
769 | } | |
770 | ||
771 | /* | |
772 | * returns dmi entry if found, NULL otherwise | |
773 | */ | |
774 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
775 | { | |
776 | struct dev_mc_list *idmi; | |
777 | ||
778 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
779 | if (bond_is_dmi_same(dmi, idmi)) { | |
780 | return idmi; | |
781 | } | |
782 | } | |
783 | ||
784 | return NULL; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Push the promiscuity flag down to appropriate slaves | |
789 | */ | |
790 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
791 | { | |
792 | if (USES_PRIMARY(bond->params.mode)) { | |
793 | /* write lock already acquired */ | |
794 | if (bond->curr_active_slave) { | |
795 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
796 | } | |
797 | } else { | |
798 | struct slave *slave; | |
799 | int i; | |
800 | bond_for_each_slave(bond, slave, i) { | |
801 | dev_set_promiscuity(slave->dev, inc); | |
802 | } | |
803 | } | |
804 | } | |
805 | ||
806 | /* | |
807 | * Push the allmulti flag down to all slaves | |
808 | */ | |
809 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
810 | { | |
811 | if (USES_PRIMARY(bond->params.mode)) { | |
812 | /* write lock already acquired */ | |
813 | if (bond->curr_active_slave) { | |
814 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
815 | } | |
816 | } else { | |
817 | struct slave *slave; | |
818 | int i; | |
819 | bond_for_each_slave(bond, slave, i) { | |
820 | dev_set_allmulti(slave->dev, inc); | |
821 | } | |
822 | } | |
823 | } | |
824 | ||
825 | /* | |
826 | * Add a Multicast address to slaves | |
827 | * according to mode | |
828 | */ | |
829 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
830 | { | |
831 | if (USES_PRIMARY(bond->params.mode)) { | |
832 | /* write lock already acquired */ | |
833 | if (bond->curr_active_slave) { | |
834 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
835 | } | |
836 | } else { | |
837 | struct slave *slave; | |
838 | int i; | |
839 | bond_for_each_slave(bond, slave, i) { | |
840 | dev_mc_add(slave->dev, addr, alen, 0); | |
841 | } | |
842 | } | |
843 | } | |
844 | ||
845 | /* | |
846 | * Remove a multicast address from slave | |
847 | * according to mode | |
848 | */ | |
849 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
850 | { | |
851 | if (USES_PRIMARY(bond->params.mode)) { | |
852 | /* write lock already acquired */ | |
853 | if (bond->curr_active_slave) { | |
854 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
855 | } | |
856 | } else { | |
857 | struct slave *slave; | |
858 | int i; | |
859 | bond_for_each_slave(bond, slave, i) { | |
860 | dev_mc_delete(slave->dev, addr, alen, 0); | |
861 | } | |
862 | } | |
863 | } | |
864 | ||
865 | /* | |
866 | * Totally destroys the mc_list in bond | |
867 | */ | |
868 | static void bond_mc_list_destroy(struct bonding *bond) | |
869 | { | |
870 | struct dev_mc_list *dmi; | |
871 | ||
872 | dmi = bond->mc_list; | |
873 | while (dmi) { | |
874 | bond->mc_list = dmi->next; | |
875 | kfree(dmi); | |
876 | dmi = bond->mc_list; | |
877 | } | |
878 | } | |
879 | ||
880 | /* | |
881 | * Copy all the Multicast addresses from src to the bonding device dst | |
882 | */ | |
de54f390 | 883 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 884 | gfp_t gfp_flag) |
1da177e4 LT |
885 | { |
886 | struct dev_mc_list *dmi, *new_dmi; | |
887 | ||
888 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 889 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
890 | |
891 | if (!new_dmi) { | |
892 | /* FIXME: Potential memory leak !!! */ | |
893 | return -ENOMEM; | |
894 | } | |
895 | ||
896 | new_dmi->next = bond->mc_list; | |
897 | bond->mc_list = new_dmi; | |
898 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
899 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
900 | new_dmi->dmi_users = dmi->dmi_users; | |
901 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
902 | } | |
903 | ||
904 | return 0; | |
905 | } | |
906 | ||
907 | /* | |
908 | * flush all members of flush->mc_list from device dev->mc_list | |
909 | */ | |
910 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
911 | { | |
912 | struct bonding *bond = bond_dev->priv; | |
913 | struct dev_mc_list *dmi; | |
914 | ||
915 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
916 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
917 | } | |
918 | ||
919 | if (bond->params.mode == BOND_MODE_8023AD) { | |
920 | /* del lacpdu mc addr from mc list */ | |
921 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
922 | ||
923 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
924 | } | |
925 | } | |
926 | ||
927 | /*--------------------------- Active slave change ---------------------------*/ | |
928 | ||
929 | /* | |
930 | * Update the mc list and multicast-related flags for the new and | |
931 | * old active slaves (if any) according to the multicast mode, and | |
932 | * promiscuous flags unconditionally. | |
933 | */ | |
934 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
935 | { | |
936 | struct dev_mc_list *dmi; | |
937 | ||
938 | if (!USES_PRIMARY(bond->params.mode)) { | |
939 | /* nothing to do - mc list is already up-to-date on | |
940 | * all slaves | |
941 | */ | |
942 | return; | |
943 | } | |
944 | ||
945 | if (old_active) { | |
946 | if (bond->dev->flags & IFF_PROMISC) { | |
947 | dev_set_promiscuity(old_active->dev, -1); | |
948 | } | |
949 | ||
950 | if (bond->dev->flags & IFF_ALLMULTI) { | |
951 | dev_set_allmulti(old_active->dev, -1); | |
952 | } | |
953 | ||
954 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
955 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
956 | } | |
957 | } | |
958 | ||
959 | if (new_active) { | |
960 | if (bond->dev->flags & IFF_PROMISC) { | |
961 | dev_set_promiscuity(new_active->dev, 1); | |
962 | } | |
963 | ||
964 | if (bond->dev->flags & IFF_ALLMULTI) { | |
965 | dev_set_allmulti(new_active->dev, 1); | |
966 | } | |
967 | ||
968 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
969 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
970 | } | |
971 | } | |
972 | } | |
973 | ||
974 | /** | |
975 | * find_best_interface - select the best available slave to be the active one | |
976 | * @bond: our bonding struct | |
977 | * | |
978 | * Warning: Caller must hold curr_slave_lock for writing. | |
979 | */ | |
980 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
981 | { | |
982 | struct slave *new_active, *old_active; | |
983 | struct slave *bestslave = NULL; | |
984 | int mintime = bond->params.updelay; | |
985 | int i; | |
986 | ||
987 | new_active = old_active = bond->curr_active_slave; | |
988 | ||
989 | if (!new_active) { /* there were no active slaves left */ | |
990 | if (bond->slave_cnt > 0) { /* found one slave */ | |
991 | new_active = bond->first_slave; | |
992 | } else { | |
993 | return NULL; /* still no slave, return NULL */ | |
994 | } | |
995 | } | |
996 | ||
997 | /* first try the primary link; if arping, a link must tx/rx traffic | |
998 | * before it can be considered the curr_active_slave - also, we would skip | |
999 | * slaves between the curr_active_slave and primary_slave that may be up | |
1000 | * and able to arp | |
1001 | */ | |
1002 | if ((bond->primary_slave) && | |
1003 | (!bond->params.arp_interval) && | |
1004 | (IS_UP(bond->primary_slave->dev))) { | |
1005 | new_active = bond->primary_slave; | |
1006 | } | |
1007 | ||
1008 | /* remember where to stop iterating over the slaves */ | |
1009 | old_active = new_active; | |
1010 | ||
1011 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1012 | if (IS_UP(new_active->dev)) { | |
1013 | if (new_active->link == BOND_LINK_UP) { | |
1014 | return new_active; | |
1015 | } else if (new_active->link == BOND_LINK_BACK) { | |
1016 | /* link up, but waiting for stabilization */ | |
1017 | if (new_active->delay < mintime) { | |
1018 | mintime = new_active->delay; | |
1019 | bestslave = new_active; | |
1020 | } | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | ||
1025 | return bestslave; | |
1026 | } | |
1027 | ||
1028 | /** | |
1029 | * change_active_interface - change the active slave into the specified one | |
1030 | * @bond: our bonding struct | |
1031 | * @new: the new slave to make the active one | |
1032 | * | |
1033 | * Set the new slave to the bond's settings and unset them on the old | |
1034 | * curr_active_slave. | |
1035 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1036 | * | |
1037 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1038 | * because it is apparently the best available slave we have, even though its | |
1039 | * updelay hasn't timed out yet. | |
1040 | * | |
1041 | * Warning: Caller must hold curr_slave_lock for writing. | |
1042 | */ | |
a77b5325 | 1043 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1044 | { |
1045 | struct slave *old_active = bond->curr_active_slave; | |
1046 | ||
1047 | if (old_active == new_active) { | |
1048 | return; | |
1049 | } | |
1050 | ||
1051 | if (new_active) { | |
1052 | if (new_active->link == BOND_LINK_BACK) { | |
1053 | if (USES_PRIMARY(bond->params.mode)) { | |
1054 | printk(KERN_INFO DRV_NAME | |
1055 | ": %s: making interface %s the new " | |
1056 | "active one %d ms earlier.\n", | |
1057 | bond->dev->name, new_active->dev->name, | |
1058 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1059 | } | |
1060 | ||
1061 | new_active->delay = 0; | |
1062 | new_active->link = BOND_LINK_UP; | |
1063 | new_active->jiffies = jiffies; | |
1064 | ||
1065 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1066 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1067 | } | |
1068 | ||
1069 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1070 | (bond->params.mode == BOND_MODE_ALB)) { | |
1071 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1072 | } | |
1073 | } else { | |
1074 | if (USES_PRIMARY(bond->params.mode)) { | |
1075 | printk(KERN_INFO DRV_NAME | |
1076 | ": %s: making interface %s the new " | |
1077 | "active one.\n", | |
1078 | bond->dev->name, new_active->dev->name); | |
1079 | } | |
1080 | } | |
1081 | } | |
1082 | ||
1da177e4 LT |
1083 | if (USES_PRIMARY(bond->params.mode)) { |
1084 | bond_mc_swap(bond, new_active, old_active); | |
1085 | } | |
1086 | ||
1087 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1088 | (bond->params.mode == BOND_MODE_ALB)) { | |
1089 | bond_alb_handle_active_change(bond, new_active); | |
8f903c70 JV |
1090 | if (old_active) |
1091 | bond_set_slave_inactive_flags(old_active); | |
1092 | if (new_active) | |
1093 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1094 | } else { |
1095 | bond->curr_active_slave = new_active; | |
1096 | } | |
c3ade5ca JV |
1097 | |
1098 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1099 | if (old_active) { | |
1100 | bond_set_slave_inactive_flags(old_active); | |
1101 | } | |
1102 | ||
1103 | if (new_active) { | |
1104 | bond_set_slave_active_flags(new_active); | |
1105 | } | |
1106 | bond_send_gratuitous_arp(bond); | |
1107 | } | |
1da177e4 LT |
1108 | } |
1109 | ||
1110 | /** | |
1111 | * bond_select_active_slave - select a new active slave, if needed | |
1112 | * @bond: our bonding struct | |
1113 | * | |
1114 | * This functions shoud be called when one of the following occurs: | |
1115 | * - The old curr_active_slave has been released or lost its link. | |
1116 | * - The primary_slave has got its link back. | |
1117 | * - A slave has got its link back and there's no old curr_active_slave. | |
1118 | * | |
1119 | * Warning: Caller must hold curr_slave_lock for writing. | |
1120 | */ | |
a77b5325 | 1121 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1122 | { |
1123 | struct slave *best_slave; | |
ff59c456 | 1124 | int rv; |
1da177e4 LT |
1125 | |
1126 | best_slave = bond_find_best_slave(bond); | |
1127 | if (best_slave != bond->curr_active_slave) { | |
1128 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1129 | rv = bond_set_carrier(bond); |
1130 | if (!rv) | |
1131 | return; | |
1132 | ||
1133 | if (netif_carrier_ok(bond->dev)) { | |
1134 | printk(KERN_INFO DRV_NAME | |
1135 | ": %s: first active interface up!\n", | |
1136 | bond->dev->name); | |
1137 | } else { | |
1138 | printk(KERN_INFO DRV_NAME ": %s: " | |
1139 | "now running without any active interface !\n", | |
1140 | bond->dev->name); | |
1141 | } | |
1da177e4 LT |
1142 | } |
1143 | } | |
1144 | ||
1145 | /*--------------------------- slave list handling ---------------------------*/ | |
1146 | ||
1147 | /* | |
1148 | * This function attaches the slave to the end of list. | |
1149 | * | |
1150 | * bond->lock held for writing by caller. | |
1151 | */ | |
1152 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1153 | { | |
1154 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1155 | new_slave->next = new_slave; | |
1156 | new_slave->prev = new_slave; | |
1157 | bond->first_slave = new_slave; | |
1158 | } else { | |
1159 | new_slave->next = bond->first_slave; | |
1160 | new_slave->prev = bond->first_slave->prev; | |
1161 | new_slave->next->prev = new_slave; | |
1162 | new_slave->prev->next = new_slave; | |
1163 | } | |
1164 | ||
1165 | bond->slave_cnt++; | |
1166 | } | |
1167 | ||
1168 | /* | |
1169 | * This function detaches the slave from the list. | |
1170 | * WARNING: no check is made to verify if the slave effectively | |
1171 | * belongs to <bond>. | |
1172 | * Nothing is freed on return, structures are just unchained. | |
1173 | * If any slave pointer in bond was pointing to <slave>, | |
1174 | * it should be changed by the calling function. | |
1175 | * | |
1176 | * bond->lock held for writing by caller. | |
1177 | */ | |
1178 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1179 | { | |
1180 | if (slave->next) { | |
1181 | slave->next->prev = slave->prev; | |
1182 | } | |
1183 | ||
1184 | if (slave->prev) { | |
1185 | slave->prev->next = slave->next; | |
1186 | } | |
1187 | ||
1188 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1189 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1190 | bond->first_slave = slave->next; | |
1191 | } else { | |
1192 | bond->first_slave = NULL; /* slave was the last one */ | |
1193 | } | |
1194 | } | |
1195 | ||
1196 | slave->next = NULL; | |
1197 | slave->prev = NULL; | |
1198 | bond->slave_cnt--; | |
1199 | } | |
1200 | ||
1201 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1202 | ||
a77b5325 | 1203 | int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1204 | { |
1205 | dprintk("bond_dev=%p\n", bond_dev); | |
1206 | dprintk("slave_dev=%p\n", slave_dev); | |
1207 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1208 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1209 | return 0; | |
1210 | } | |
1211 | ||
8531c5ff | 1212 | #define BOND_INTERSECT_FEATURES \ |
8648b305 | 1213 | (NETIF_F_SG | NETIF_F_ALL_CSUM | NETIF_F_TSO | NETIF_F_UFO) |
8531c5ff AK |
1214 | |
1215 | /* | |
8e3babcd JV |
1216 | * Compute the common dev->feature set available to all slaves. Some |
1217 | * feature bits are managed elsewhere, so preserve feature bits set on | |
1218 | * master device that are not part of the examined set. | |
8531c5ff AK |
1219 | */ |
1220 | static int bond_compute_features(struct bonding *bond) | |
1221 | { | |
8e3babcd | 1222 | unsigned long features = BOND_INTERSECT_FEATURES; |
8531c5ff AK |
1223 | struct slave *slave; |
1224 | struct net_device *bond_dev = bond->dev; | |
54ef3137 | 1225 | unsigned short max_hard_header_len = ETH_HLEN; |
8e3babcd | 1226 | int i; |
8531c5ff | 1227 | |
54ef3137 | 1228 | bond_for_each_slave(bond, slave, i) { |
8e3babcd | 1229 | features &= (slave->dev->features & BOND_INTERSECT_FEATURES); |
54ef3137 JV |
1230 | if (slave->dev->hard_header_len > max_hard_header_len) |
1231 | max_hard_header_len = slave->dev->hard_header_len; | |
1232 | } | |
8531c5ff | 1233 | |
8531c5ff | 1234 | if ((features & NETIF_F_SG) && |
8648b305 | 1235 | !(features & NETIF_F_ALL_CSUM)) |
8531c5ff | 1236 | features &= ~NETIF_F_SG; |
8531c5ff | 1237 | |
a0de3adf JV |
1238 | /* |
1239 | * features will include NETIF_F_TSO (NETIF_F_UFO) iff all | |
1240 | * slave devices support NETIF_F_TSO (NETIF_F_UFO), which | |
1241 | * implies that all slaves also support scatter-gather | |
1242 | * (NETIF_F_SG), which implies that features also includes | |
1243 | * NETIF_F_SG. So no need to check whether we have an | |
1244 | * illegal combination of NETIF_F_{TSO,UFO} and | |
1245 | * !NETIF_F_SG | |
1246 | */ | |
1247 | ||
8e3babcd | 1248 | features |= (bond_dev->features & ~BOND_INTERSECT_FEATURES); |
8531c5ff | 1249 | bond_dev->features = features; |
54ef3137 | 1250 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1251 | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1da177e4 | 1255 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1256 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1257 | { |
1258 | struct bonding *bond = bond_dev->priv; | |
1259 | struct slave *new_slave = NULL; | |
1260 | struct dev_mc_list *dmi; | |
1261 | struct sockaddr addr; | |
1262 | int link_reporting; | |
1263 | int old_features = bond_dev->features; | |
1264 | int res = 0; | |
1265 | ||
552709d5 | 1266 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
1267 | slave_dev->do_ioctl == NULL) { | |
1da177e4 | 1268 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1269 | ": %s: Warning: no link monitoring support for %s\n", |
1270 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1271 | } |
1272 | ||
1273 | /* bond must be initialized by bond_open() before enslaving */ | |
1274 | if (!(bond_dev->flags & IFF_UP)) { | |
1275 | dprintk("Error, master_dev is not up\n"); | |
1276 | return -EPERM; | |
1277 | } | |
1278 | ||
1279 | /* already enslaved */ | |
1280 | if (slave_dev->flags & IFF_SLAVE) { | |
1281 | dprintk("Error, Device was already enslaved\n"); | |
1282 | return -EBUSY; | |
1283 | } | |
1284 | ||
1285 | /* vlan challenged mutual exclusion */ | |
1286 | /* no need to lock since we're protected by rtnl_lock */ | |
1287 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1288 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1289 | if (!list_empty(&bond->vlan_list)) { | |
1290 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1291 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1292 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1293 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1294 | bond_dev->name); |
1295 | return -EPERM; | |
1296 | } else { | |
1297 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1298 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1299 | "slave %s. Adding VLANs will be blocked as " |
1300 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1301 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1302 | bond_dev->name); |
1303 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1304 | } | |
1305 | } else { | |
1306 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1307 | if (bond->slave_cnt == 0) { | |
1308 | /* First slave, and it is not VLAN challenged, | |
1309 | * so remove the block of adding VLANs over the bond. | |
1310 | */ | |
1311 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1312 | } | |
1313 | } | |
1314 | ||
217df670 JV |
1315 | /* |
1316 | * Old ifenslave binaries are no longer supported. These can | |
1317 | * be identified with moderate accurary by the state of the slave: | |
1318 | * the current ifenslave will set the interface down prior to | |
1319 | * enslaving it; the old ifenslave will not. | |
1320 | */ | |
1321 | if ((slave_dev->flags & IFF_UP)) { | |
1322 | printk(KERN_ERR DRV_NAME ": %s is up. " | |
1323 | "This may be due to an out of date ifenslave.\n", | |
1324 | slave_dev->name); | |
1325 | res = -EPERM; | |
1326 | goto err_undo_flags; | |
1327 | } | |
1da177e4 | 1328 | |
217df670 JV |
1329 | if (slave_dev->set_mac_address == NULL) { |
1330 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
1331 | ": %s: Error: The slave device you specified does " |
1332 | "not support setting the MAC address. " | |
1333 | "Your kernel likely does not support slave " | |
1334 | "devices.\n", bond_dev->name); | |
1335 | res = -EOPNOTSUPP; | |
217df670 | 1336 | goto err_undo_flags; |
1da177e4 LT |
1337 | } |
1338 | ||
418e8f3d LR |
1339 | if (slave_dev->get_stats == NULL) { |
1340 | printk(KERN_NOTICE DRV_NAME | |
1341 | ": %s: the driver for slave device %s does not provide " | |
1342 | "get_stats function, network statistics will be " | |
1343 | "inaccurate.\n", bond_dev->name, slave_dev->name); | |
1344 | } | |
1345 | ||
1da177e4 LT |
1346 | new_slave = kmalloc(sizeof(struct slave), GFP_KERNEL); |
1347 | if (!new_slave) { | |
1348 | res = -ENOMEM; | |
1349 | goto err_undo_flags; | |
1350 | } | |
1351 | ||
1352 | memset(new_slave, 0, sizeof(struct slave)); | |
1353 | ||
1354 | /* save slave's original flags before calling | |
1355 | * netdev_set_master and dev_open | |
1356 | */ | |
1357 | new_slave->original_flags = slave_dev->flags; | |
1358 | ||
217df670 JV |
1359 | /* |
1360 | * Save slave's original ("permanent") mac address for modes | |
1361 | * that need it, and for restoring it upon release, and then | |
1362 | * set it to the master's address | |
1363 | */ | |
1364 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1365 | |
217df670 JV |
1366 | /* |
1367 | * Set slave to master's mac address. The application already | |
1368 | * set the master's mac address to that of the first slave | |
1369 | */ | |
1370 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1371 | addr.sa_family = slave_dev->type; | |
1372 | res = dev_set_mac_address(slave_dev, &addr); | |
1373 | if (res) { | |
1374 | dprintk("Error %d calling set_mac_address\n", res); | |
1375 | goto err_free; | |
1376 | } | |
1da177e4 | 1377 | |
217df670 JV |
1378 | /* open the slave since the application closed it */ |
1379 | res = dev_open(slave_dev); | |
1380 | if (res) { | |
1381 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
1382 | goto err_restore_mac; | |
1da177e4 LT |
1383 | } |
1384 | ||
1385 | res = netdev_set_master(slave_dev, bond_dev); | |
1386 | if (res) { | |
1387 | dprintk("Error %d calling netdev_set_master\n", res); | |
217df670 | 1388 | goto err_close; |
1da177e4 LT |
1389 | } |
1390 | ||
1391 | new_slave->dev = slave_dev; | |
0b680e75 | 1392 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 LT |
1393 | |
1394 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1395 | (bond->params.mode == BOND_MODE_ALB)) { | |
1396 | /* bond_alb_init_slave() must be called before all other stages since | |
1397 | * it might fail and we do not want to have to undo everything | |
1398 | */ | |
1399 | res = bond_alb_init_slave(bond, new_slave); | |
1400 | if (res) { | |
1401 | goto err_unset_master; | |
1402 | } | |
1403 | } | |
1404 | ||
1405 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1406 | * master's promisc (and mc) settings only if it becomes the | |
1407 | * curr_active_slave, and that is taken care of later when calling | |
1408 | * bond_change_active() | |
1409 | */ | |
1410 | if (!USES_PRIMARY(bond->params.mode)) { | |
1411 | /* set promiscuity level to new slave */ | |
1412 | if (bond_dev->flags & IFF_PROMISC) { | |
1413 | dev_set_promiscuity(slave_dev, 1); | |
1414 | } | |
1415 | ||
1416 | /* set allmulti level to new slave */ | |
1417 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1418 | dev_set_allmulti(slave_dev, 1); | |
1419 | } | |
1420 | ||
1421 | /* upload master's mc_list to new slave */ | |
1422 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1423 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1428 | /* add lacpdu mc addr to mc list */ | |
1429 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1430 | ||
1431 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1432 | } | |
1433 | ||
1434 | bond_add_vlans_on_slave(bond, slave_dev); | |
1435 | ||
1436 | write_lock_bh(&bond->lock); | |
1437 | ||
1438 | bond_attach_slave(bond, new_slave); | |
1439 | ||
1440 | new_slave->delay = 0; | |
1441 | new_slave->link_failure_count = 0; | |
1442 | ||
8531c5ff AK |
1443 | bond_compute_features(bond); |
1444 | ||
f5b2b966 JV |
1445 | new_slave->last_arp_rx = jiffies; |
1446 | ||
1da177e4 LT |
1447 | if (bond->params.miimon && !bond->params.use_carrier) { |
1448 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1449 | ||
1450 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1451 | /* | |
1452 | * miimon is set but a bonded network driver | |
1453 | * does not support ETHTOOL/MII and | |
1454 | * arp_interval is not set. Note: if | |
1455 | * use_carrier is enabled, we will never go | |
1456 | * here (because netif_carrier is always | |
1457 | * supported); thus, we don't need to change | |
1458 | * the messages for netif_carrier. | |
1459 | */ | |
1460 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1461 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1462 | "available for interface %s, and " |
1463 | "arp_interval/arp_ip_target module parameters " | |
1464 | "not specified, thus bonding will not detect " | |
1465 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1466 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1467 | } else if (link_reporting == -1) { |
1468 | /* unable get link status using mii/ethtool */ | |
1469 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1470 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1471 | "interface %s; the network driver associated " |
1472 | "with this interface does not support MII or " | |
1473 | "ETHTOOL link status reporting, thus miimon " | |
1474 | "has no effect on this interface.\n", | |
4e0952c7 | 1475 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1476 | } |
1477 | } | |
1478 | ||
1479 | /* check for initial state */ | |
1480 | if (!bond->params.miimon || | |
1481 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1482 | if (bond->params.updelay) { | |
1483 | dprintk("Initial state of slave_dev is " | |
1484 | "BOND_LINK_BACK\n"); | |
1485 | new_slave->link = BOND_LINK_BACK; | |
1486 | new_slave->delay = bond->params.updelay; | |
1487 | } else { | |
1488 | dprintk("Initial state of slave_dev is " | |
1489 | "BOND_LINK_UP\n"); | |
1490 | new_slave->link = BOND_LINK_UP; | |
1491 | } | |
1492 | new_slave->jiffies = jiffies; | |
1493 | } else { | |
1494 | dprintk("Initial state of slave_dev is " | |
1495 | "BOND_LINK_DOWN\n"); | |
1496 | new_slave->link = BOND_LINK_DOWN; | |
1497 | } | |
1498 | ||
1499 | if (bond_update_speed_duplex(new_slave) && | |
1500 | (new_slave->link != BOND_LINK_DOWN)) { | |
1501 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1502 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1503 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1504 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1505 | |
1506 | if (bond->params.mode == BOND_MODE_8023AD) { | |
4e0952c7 MW |
1507 | printk(KERN_WARNING DRV_NAME |
1508 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " | |
1da177e4 | 1509 | "support in base driver for proper aggregator " |
4e0952c7 | 1510 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1511 | } |
1512 | } | |
1513 | ||
1514 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1515 | /* if there is a primary slave, remember it */ | |
1516 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1517 | bond->primary_slave = new_slave; | |
1518 | } | |
1519 | } | |
1520 | ||
1521 | switch (bond->params.mode) { | |
1522 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1523 | bond_set_slave_inactive_flags(new_slave); |
1524 | bond_select_active_slave(bond); | |
1da177e4 LT |
1525 | break; |
1526 | case BOND_MODE_8023AD: | |
1527 | /* in 802.3ad mode, the internal mechanism | |
1528 | * will activate the slaves in the selected | |
1529 | * aggregator | |
1530 | */ | |
1531 | bond_set_slave_inactive_flags(new_slave); | |
1532 | /* if this is the first slave */ | |
1533 | if (bond->slave_cnt == 1) { | |
1534 | SLAVE_AD_INFO(new_slave).id = 1; | |
1535 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1536 | * can be called only after the mac address of the bond is set | |
1537 | */ | |
1538 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1539 | bond->params.lacp_fast); | |
1540 | } else { | |
1541 | SLAVE_AD_INFO(new_slave).id = | |
1542 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1543 | } | |
1544 | ||
1545 | bond_3ad_bind_slave(new_slave); | |
1546 | break; | |
1547 | case BOND_MODE_TLB: | |
1548 | case BOND_MODE_ALB: | |
1549 | new_slave->state = BOND_STATE_ACTIVE; | |
1550 | if ((!bond->curr_active_slave) && | |
1551 | (new_slave->link != BOND_LINK_DOWN)) { | |
1552 | /* first slave or no active slave yet, and this link | |
1553 | * is OK, so make this interface the active one | |
1554 | */ | |
1555 | bond_change_active_slave(bond, new_slave); | |
8f903c70 JV |
1556 | } else { |
1557 | bond_set_slave_inactive_flags(new_slave); | |
1da177e4 LT |
1558 | } |
1559 | break; | |
1560 | default: | |
1561 | dprintk("This slave is always active in trunk mode\n"); | |
1562 | ||
1563 | /* always active in trunk mode */ | |
1564 | new_slave->state = BOND_STATE_ACTIVE; | |
1565 | ||
1566 | /* In trunking mode there is little meaning to curr_active_slave | |
1567 | * anyway (it holds no special properties of the bond device), | |
1568 | * so we can change it without calling change_active_interface() | |
1569 | */ | |
1570 | if (!bond->curr_active_slave) { | |
1571 | bond->curr_active_slave = new_slave; | |
1572 | } | |
1573 | break; | |
1574 | } /* switch(bond_mode) */ | |
1575 | ||
ff59c456 JV |
1576 | bond_set_carrier(bond); |
1577 | ||
1da177e4 LT |
1578 | write_unlock_bh(&bond->lock); |
1579 | ||
b76cdba9 MW |
1580 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1581 | if (res) | |
1582 | goto err_unset_master; | |
1583 | ||
1da177e4 LT |
1584 | printk(KERN_INFO DRV_NAME |
1585 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1586 | bond_dev->name, slave_dev->name, | |
1587 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1588 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1589 | ||
1590 | /* enslave is successful */ | |
1591 | return 0; | |
1592 | ||
1593 | /* Undo stages on error */ | |
1594 | err_unset_master: | |
1595 | netdev_set_master(slave_dev, NULL); | |
1596 | ||
1597 | err_close: | |
1598 | dev_close(slave_dev); | |
1599 | ||
1600 | err_restore_mac: | |
1601 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); | |
1602 | addr.sa_family = slave_dev->type; | |
1603 | dev_set_mac_address(slave_dev, &addr); | |
1604 | ||
1605 | err_free: | |
1606 | kfree(new_slave); | |
1607 | ||
1608 | err_undo_flags: | |
1609 | bond_dev->features = old_features; | |
8531c5ff | 1610 | |
1da177e4 LT |
1611 | return res; |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * Try to release the slave device <slave> from the bond device <master> | |
1616 | * It is legal to access curr_active_slave without a lock because all the function | |
1617 | * is write-locked. | |
1618 | * | |
1619 | * The rules for slave state should be: | |
1620 | * for Active/Backup: | |
1621 | * Active stays on all backups go down | |
1622 | * for Bonded connections: | |
1623 | * The first up interface should be left on and all others downed. | |
1624 | */ | |
a77b5325 | 1625 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1626 | { |
1627 | struct bonding *bond = bond_dev->priv; | |
1628 | struct slave *slave, *oldcurrent; | |
1629 | struct sockaddr addr; | |
1630 | int mac_addr_differ; | |
1631 | ||
1632 | /* slave is not a slave or master is not master of this slave */ | |
1633 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1634 | (slave_dev->master != bond_dev)) { | |
1635 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1636 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
1637 | bond_dev->name, slave_dev->name); |
1638 | return -EINVAL; | |
1639 | } | |
1640 | ||
1641 | write_lock_bh(&bond->lock); | |
1642 | ||
1643 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1644 | if (!slave) { | |
1645 | /* not a slave of this bond */ | |
1646 | printk(KERN_INFO DRV_NAME | |
1647 | ": %s: %s not enslaved\n", | |
1648 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1649 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1650 | return -EINVAL; |
1651 | } | |
1652 | ||
1653 | mac_addr_differ = memcmp(bond_dev->dev_addr, | |
1654 | slave->perm_hwaddr, | |
1655 | ETH_ALEN); | |
1656 | if (!mac_addr_differ && (bond->slave_cnt > 1)) { | |
1657 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1658 | ": %s: Warning: the permanent HWaddr of %s " |
1da177e4 LT |
1659 | "- %02X:%02X:%02X:%02X:%02X:%02X - is " |
1660 | "still in use by %s. Set the HWaddr of " | |
1661 | "%s to a different address to avoid " | |
1662 | "conflicts.\n", | |
4e0952c7 | 1663 | bond_dev->name, |
1da177e4 LT |
1664 | slave_dev->name, |
1665 | slave->perm_hwaddr[0], | |
1666 | slave->perm_hwaddr[1], | |
1667 | slave->perm_hwaddr[2], | |
1668 | slave->perm_hwaddr[3], | |
1669 | slave->perm_hwaddr[4], | |
1670 | slave->perm_hwaddr[5], | |
1671 | bond_dev->name, | |
1672 | slave_dev->name); | |
1673 | } | |
1674 | ||
1675 | /* Inform AD package of unbinding of slave. */ | |
1676 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1677 | /* must be called before the slave is | |
1678 | * detached from the list | |
1679 | */ | |
1680 | bond_3ad_unbind_slave(slave); | |
1681 | } | |
1682 | ||
1683 | printk(KERN_INFO DRV_NAME | |
1684 | ": %s: releasing %s interface %s\n", | |
1685 | bond_dev->name, | |
1686 | (slave->state == BOND_STATE_ACTIVE) | |
1687 | ? "active" : "backup", | |
1688 | slave_dev->name); | |
1689 | ||
1690 | oldcurrent = bond->curr_active_slave; | |
1691 | ||
1692 | bond->current_arp_slave = NULL; | |
1693 | ||
1694 | /* release the slave from its bond */ | |
1695 | bond_detach_slave(bond, slave); | |
1696 | ||
8531c5ff AK |
1697 | bond_compute_features(bond); |
1698 | ||
1da177e4 LT |
1699 | if (bond->primary_slave == slave) { |
1700 | bond->primary_slave = NULL; | |
1701 | } | |
1702 | ||
1703 | if (oldcurrent == slave) { | |
1704 | bond_change_active_slave(bond, NULL); | |
1705 | } | |
1706 | ||
1707 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1708 | (bond->params.mode == BOND_MODE_ALB)) { | |
1709 | /* Must be called only after the slave has been | |
1710 | * detached from the list and the curr_active_slave | |
1711 | * has been cleared (if our_slave == old_current), | |
1712 | * but before a new active slave is selected. | |
1713 | */ | |
1714 | bond_alb_deinit_slave(bond, slave); | |
1715 | } | |
1716 | ||
ff59c456 | 1717 | if (oldcurrent == slave) |
1da177e4 LT |
1718 | bond_select_active_slave(bond); |
1719 | ||
1da177e4 | 1720 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1721 | bond_set_carrier(bond); |
1722 | ||
1da177e4 LT |
1723 | /* if the last slave was removed, zero the mac address |
1724 | * of the master so it will be set by the application | |
1725 | * to the mac address of the first slave | |
1726 | */ | |
1727 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1728 | ||
1729 | if (list_empty(&bond->vlan_list)) { | |
1730 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1731 | } else { | |
1732 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1733 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1734 | "still has VLANs.\n", |
4e0952c7 | 1735 | bond_dev->name, bond_dev->name); |
1da177e4 | 1736 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1737 | ": %s: When re-adding slaves, make sure the bond's " |
1738 | "HW address matches its VLANs'.\n", | |
1739 | bond_dev->name); | |
1da177e4 LT |
1740 | } |
1741 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1742 | !bond_has_challenged_slaves(bond)) { | |
1743 | printk(KERN_INFO DRV_NAME | |
4e0952c7 | 1744 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 1745 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 1746 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
1747 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1748 | } | |
1749 | ||
1750 | write_unlock_bh(&bond->lock); | |
1751 | ||
b76cdba9 MW |
1752 | /* must do this from outside any spinlocks */ |
1753 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1754 | ||
1da177e4 LT |
1755 | bond_del_vlans_from_slave(bond, slave_dev); |
1756 | ||
1757 | /* If the mode USES_PRIMARY, then we should only remove its | |
1758 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1759 | * already taken care of above when we detached the slave | |
1760 | */ | |
1761 | if (!USES_PRIMARY(bond->params.mode)) { | |
1762 | /* unset promiscuity level from slave */ | |
1763 | if (bond_dev->flags & IFF_PROMISC) { | |
1764 | dev_set_promiscuity(slave_dev, -1); | |
1765 | } | |
1766 | ||
1767 | /* unset allmulti level from slave */ | |
1768 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1769 | dev_set_allmulti(slave_dev, -1); | |
1770 | } | |
1771 | ||
1772 | /* flush master's mc_list from slave */ | |
1773 | bond_mc_list_flush(bond_dev, slave_dev); | |
1774 | } | |
1775 | ||
1776 | netdev_set_master(slave_dev, NULL); | |
1777 | ||
1778 | /* close slave before restoring its mac address */ | |
1779 | dev_close(slave_dev); | |
1780 | ||
217df670 JV |
1781 | /* restore original ("permanent") mac address */ |
1782 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1783 | addr.sa_family = slave_dev->type; | |
1784 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 | 1785 | |
8f903c70 | 1786 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1787 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1788 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1789 | |
1790 | kfree(slave); | |
1791 | ||
1792 | return 0; /* deletion OK */ | |
1793 | } | |
1794 | ||
1795 | /* | |
1796 | * This function releases all slaves. | |
1797 | */ | |
1798 | static int bond_release_all(struct net_device *bond_dev) | |
1799 | { | |
1800 | struct bonding *bond = bond_dev->priv; | |
1801 | struct slave *slave; | |
1802 | struct net_device *slave_dev; | |
1803 | struct sockaddr addr; | |
1804 | ||
1805 | write_lock_bh(&bond->lock); | |
1806 | ||
ff59c456 JV |
1807 | netif_carrier_off(bond_dev); |
1808 | ||
1da177e4 LT |
1809 | if (bond->slave_cnt == 0) { |
1810 | goto out; | |
1811 | } | |
1812 | ||
1813 | bond->current_arp_slave = NULL; | |
1814 | bond->primary_slave = NULL; | |
1815 | bond_change_active_slave(bond, NULL); | |
1816 | ||
1817 | while ((slave = bond->first_slave) != NULL) { | |
1818 | /* Inform AD package of unbinding of slave | |
1819 | * before slave is detached from the list. | |
1820 | */ | |
1821 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1822 | bond_3ad_unbind_slave(slave); | |
1823 | } | |
1824 | ||
1825 | slave_dev = slave->dev; | |
1826 | bond_detach_slave(bond, slave); | |
1827 | ||
1828 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1829 | (bond->params.mode == BOND_MODE_ALB)) { | |
1830 | /* must be called only after the slave | |
1831 | * has been detached from the list | |
1832 | */ | |
1833 | bond_alb_deinit_slave(bond, slave); | |
1834 | } | |
1835 | ||
8531c5ff AK |
1836 | bond_compute_features(bond); |
1837 | ||
1da177e4 LT |
1838 | /* now that the slave is detached, unlock and perform |
1839 | * all the undo steps that should not be called from | |
1840 | * within a lock. | |
1841 | */ | |
1842 | write_unlock_bh(&bond->lock); | |
1843 | ||
b76cdba9 | 1844 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
1845 | bond_del_vlans_from_slave(bond, slave_dev); |
1846 | ||
1847 | /* If the mode USES_PRIMARY, then we should only remove its | |
1848 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1849 | * already taken care of above when we detached the slave | |
1850 | */ | |
1851 | if (!USES_PRIMARY(bond->params.mode)) { | |
1852 | /* unset promiscuity level from slave */ | |
1853 | if (bond_dev->flags & IFF_PROMISC) { | |
1854 | dev_set_promiscuity(slave_dev, -1); | |
1855 | } | |
1856 | ||
1857 | /* unset allmulti level from slave */ | |
1858 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1859 | dev_set_allmulti(slave_dev, -1); | |
1860 | } | |
1861 | ||
1862 | /* flush master's mc_list from slave */ | |
1863 | bond_mc_list_flush(bond_dev, slave_dev); | |
1864 | } | |
1865 | ||
1866 | netdev_set_master(slave_dev, NULL); | |
1867 | ||
1868 | /* close slave before restoring its mac address */ | |
1869 | dev_close(slave_dev); | |
1870 | ||
217df670 JV |
1871 | /* restore original ("permanent") mac address*/ |
1872 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1873 | addr.sa_family = slave_dev->type; | |
1874 | dev_set_mac_address(slave_dev, &addr); | |
1da177e4 | 1875 | |
8f903c70 JV |
1876 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
1877 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
1878 | |
1879 | kfree(slave); | |
1880 | ||
1881 | /* re-acquire the lock before getting the next slave */ | |
1882 | write_lock_bh(&bond->lock); | |
1883 | } | |
1884 | ||
1885 | /* zero the mac address of the master so it will be | |
1886 | * set by the application to the mac address of the | |
1887 | * first slave | |
1888 | */ | |
1889 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1890 | ||
1891 | if (list_empty(&bond->vlan_list)) { | |
1892 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1893 | } else { | |
1894 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1895 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1896 | "still has VLANs.\n", |
4e0952c7 | 1897 | bond_dev->name, bond_dev->name); |
1da177e4 | 1898 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1899 | ": %s: When re-adding slaves, make sure the bond's " |
1900 | "HW address matches its VLANs'.\n", | |
1901 | bond_dev->name); | |
1da177e4 LT |
1902 | } |
1903 | ||
1904 | printk(KERN_INFO DRV_NAME | |
1905 | ": %s: released all slaves\n", | |
1906 | bond_dev->name); | |
1907 | ||
1908 | out: | |
1909 | write_unlock_bh(&bond->lock); | |
1910 | ||
1911 | return 0; | |
1912 | } | |
1913 | ||
1914 | /* | |
1915 | * This function changes the active slave to slave <slave_dev>. | |
1916 | * It returns -EINVAL in the following cases. | |
1917 | * - <slave_dev> is not found in the list. | |
1918 | * - There is not active slave now. | |
1919 | * - <slave_dev> is already active. | |
1920 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
1921 | * - <slave_dev> is not running. | |
1922 | * In these cases, this fuction does nothing. | |
1923 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
1924 | */ | |
1925 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
1926 | { | |
1927 | struct bonding *bond = bond_dev->priv; | |
1928 | struct slave *old_active = NULL; | |
1929 | struct slave *new_active = NULL; | |
1930 | int res = 0; | |
1931 | ||
1932 | if (!USES_PRIMARY(bond->params.mode)) { | |
1933 | return -EINVAL; | |
1934 | } | |
1935 | ||
1936 | /* Verify that master_dev is indeed the master of slave_dev */ | |
1937 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1938 | (slave_dev->master != bond_dev)) { | |
1939 | return -EINVAL; | |
1940 | } | |
1941 | ||
1942 | write_lock_bh(&bond->lock); | |
1943 | ||
1944 | old_active = bond->curr_active_slave; | |
1945 | new_active = bond_get_slave_by_dev(bond, slave_dev); | |
1946 | ||
1947 | /* | |
1948 | * Changing to the current active: do nothing; return success. | |
1949 | */ | |
1950 | if (new_active && (new_active == old_active)) { | |
1951 | write_unlock_bh(&bond->lock); | |
1952 | return 0; | |
1953 | } | |
1954 | ||
1955 | if ((new_active) && | |
1956 | (old_active) && | |
1957 | (new_active->link == BOND_LINK_UP) && | |
1958 | IS_UP(new_active->dev)) { | |
1959 | bond_change_active_slave(bond, new_active); | |
1960 | } else { | |
1961 | res = -EINVAL; | |
1962 | } | |
1963 | ||
1964 | write_unlock_bh(&bond->lock); | |
1965 | ||
1966 | return res; | |
1967 | } | |
1968 | ||
1da177e4 LT |
1969 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
1970 | { | |
1971 | struct bonding *bond = bond_dev->priv; | |
1972 | ||
1973 | info->bond_mode = bond->params.mode; | |
1974 | info->miimon = bond->params.miimon; | |
1975 | ||
1976 | read_lock_bh(&bond->lock); | |
1977 | info->num_slaves = bond->slave_cnt; | |
1978 | read_unlock_bh(&bond->lock); | |
1979 | ||
1980 | return 0; | |
1981 | } | |
1982 | ||
1983 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
1984 | { | |
1985 | struct bonding *bond = bond_dev->priv; | |
1986 | struct slave *slave; | |
1987 | int i, found = 0; | |
1988 | ||
1989 | if (info->slave_id < 0) { | |
1990 | return -ENODEV; | |
1991 | } | |
1992 | ||
1993 | read_lock_bh(&bond->lock); | |
1994 | ||
1995 | bond_for_each_slave(bond, slave, i) { | |
1996 | if (i == (int)info->slave_id) { | |
1997 | found = 1; | |
1998 | break; | |
1999 | } | |
2000 | } | |
2001 | ||
2002 | read_unlock_bh(&bond->lock); | |
2003 | ||
2004 | if (found) { | |
2005 | strcpy(info->slave_name, slave->dev->name); | |
2006 | info->link = slave->link; | |
2007 | info->state = slave->state; | |
2008 | info->link_failure_count = slave->link_failure_count; | |
2009 | } else { | |
2010 | return -ENODEV; | |
2011 | } | |
2012 | ||
2013 | return 0; | |
2014 | } | |
2015 | ||
2016 | /*-------------------------------- Monitoring -------------------------------*/ | |
2017 | ||
2018 | /* this function is called regularly to monitor each slave's link. */ | |
a77b5325 | 2019 | void bond_mii_monitor(struct net_device *bond_dev) |
1da177e4 LT |
2020 | { |
2021 | struct bonding *bond = bond_dev->priv; | |
2022 | struct slave *slave, *oldcurrent; | |
2023 | int do_failover = 0; | |
2024 | int delta_in_ticks; | |
2025 | int i; | |
2026 | ||
2027 | read_lock(&bond->lock); | |
2028 | ||
2029 | delta_in_ticks = (bond->params.miimon * HZ) / 1000; | |
2030 | ||
2031 | if (bond->kill_timers) { | |
2032 | goto out; | |
2033 | } | |
2034 | ||
2035 | if (bond->slave_cnt == 0) { | |
2036 | goto re_arm; | |
2037 | } | |
2038 | ||
2039 | /* we will try to read the link status of each of our slaves, and | |
2040 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2041 | * supporting MII status, we won't do anything so that a user-space | |
2042 | * program could monitor the link itself if needed. | |
2043 | */ | |
2044 | ||
2045 | read_lock(&bond->curr_slave_lock); | |
2046 | oldcurrent = bond->curr_active_slave; | |
2047 | read_unlock(&bond->curr_slave_lock); | |
2048 | ||
2049 | bond_for_each_slave(bond, slave, i) { | |
2050 | struct net_device *slave_dev = slave->dev; | |
2051 | int link_state; | |
2052 | u16 old_speed = slave->speed; | |
2053 | u8 old_duplex = slave->duplex; | |
2054 | ||
2055 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2056 | ||
2057 | switch (slave->link) { | |
2058 | case BOND_LINK_UP: /* the link was up */ | |
2059 | if (link_state == BMSR_LSTATUS) { | |
2060 | /* link stays up, nothing more to do */ | |
2061 | break; | |
2062 | } else { /* link going down */ | |
2063 | slave->link = BOND_LINK_FAIL; | |
2064 | slave->delay = bond->params.downdelay; | |
2065 | ||
2066 | if (slave->link_failure_count < UINT_MAX) { | |
2067 | slave->link_failure_count++; | |
2068 | } | |
2069 | ||
2070 | if (bond->params.downdelay) { | |
2071 | printk(KERN_INFO DRV_NAME | |
2072 | ": %s: link status down for %s " | |
2073 | "interface %s, disabling it in " | |
2074 | "%d ms.\n", | |
2075 | bond_dev->name, | |
2076 | IS_UP(slave_dev) | |
2077 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2078 | ? ((slave == oldcurrent) | |
2079 | ? "active " : "backup ") | |
2080 | : "") | |
2081 | : "idle ", | |
2082 | slave_dev->name, | |
2083 | bond->params.downdelay * bond->params.miimon); | |
2084 | } | |
2085 | } | |
2086 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2087 | ensure proper action to be taken | |
2088 | */ | |
2089 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2090 | if (link_state != BMSR_LSTATUS) { | |
2091 | /* link stays down */ | |
2092 | if (slave->delay <= 0) { | |
2093 | /* link down for too long time */ | |
2094 | slave->link = BOND_LINK_DOWN; | |
2095 | ||
2096 | /* in active/backup mode, we must | |
2097 | * completely disable this interface | |
2098 | */ | |
2099 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2100 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2101 | bond_set_slave_inactive_flags(slave); | |
2102 | } | |
2103 | ||
2104 | printk(KERN_INFO DRV_NAME | |
2105 | ": %s: link status definitely " | |
2106 | "down for interface %s, " | |
2107 | "disabling it\n", | |
2108 | bond_dev->name, | |
2109 | slave_dev->name); | |
2110 | ||
2111 | /* notify ad that the link status has changed */ | |
2112 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2113 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2114 | } | |
2115 | ||
2116 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2117 | (bond->params.mode == BOND_MODE_ALB)) { | |
2118 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2119 | } | |
2120 | ||
2121 | if (slave == oldcurrent) { | |
2122 | do_failover = 1; | |
2123 | } | |
2124 | } else { | |
2125 | slave->delay--; | |
2126 | } | |
2127 | } else { | |
2128 | /* link up again */ | |
2129 | slave->link = BOND_LINK_UP; | |
2130 | slave->jiffies = jiffies; | |
2131 | printk(KERN_INFO DRV_NAME | |
2132 | ": %s: link status up again after %d " | |
2133 | "ms for interface %s.\n", | |
2134 | bond_dev->name, | |
2135 | (bond->params.downdelay - slave->delay) * bond->params.miimon, | |
2136 | slave_dev->name); | |
2137 | } | |
2138 | break; | |
2139 | case BOND_LINK_DOWN: /* the link was down */ | |
2140 | if (link_state != BMSR_LSTATUS) { | |
2141 | /* the link stays down, nothing more to do */ | |
2142 | break; | |
2143 | } else { /* link going up */ | |
2144 | slave->link = BOND_LINK_BACK; | |
2145 | slave->delay = bond->params.updelay; | |
2146 | ||
2147 | if (bond->params.updelay) { | |
2148 | /* if updelay == 0, no need to | |
2149 | advertise about a 0 ms delay */ | |
2150 | printk(KERN_INFO DRV_NAME | |
2151 | ": %s: link status up for " | |
2152 | "interface %s, enabling it " | |
2153 | "in %d ms.\n", | |
2154 | bond_dev->name, | |
2155 | slave_dev->name, | |
2156 | bond->params.updelay * bond->params.miimon); | |
2157 | } | |
2158 | } | |
2159 | /* no break ! fall through the BOND_LINK_BACK state in | |
2160 | case there's something to do. | |
2161 | */ | |
2162 | case BOND_LINK_BACK: /* the link has just come back */ | |
2163 | if (link_state != BMSR_LSTATUS) { | |
2164 | /* link down again */ | |
2165 | slave->link = BOND_LINK_DOWN; | |
2166 | ||
2167 | printk(KERN_INFO DRV_NAME | |
2168 | ": %s: link status down again after %d " | |
2169 | "ms for interface %s.\n", | |
2170 | bond_dev->name, | |
2171 | (bond->params.updelay - slave->delay) * bond->params.miimon, | |
2172 | slave_dev->name); | |
2173 | } else { | |
2174 | /* link stays up */ | |
2175 | if (slave->delay == 0) { | |
2176 | /* now the link has been up for long time enough */ | |
2177 | slave->link = BOND_LINK_UP; | |
2178 | slave->jiffies = jiffies; | |
2179 | ||
2180 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2181 | /* prevent it from being the active one */ | |
2182 | slave->state = BOND_STATE_BACKUP; | |
2183 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2184 | /* make it immediately active */ | |
2185 | slave->state = BOND_STATE_ACTIVE; | |
2186 | } else if (slave != bond->primary_slave) { | |
2187 | /* prevent it from being the active one */ | |
2188 | slave->state = BOND_STATE_BACKUP; | |
2189 | } | |
2190 | ||
2191 | printk(KERN_INFO DRV_NAME | |
2192 | ": %s: link status definitely " | |
2193 | "up for interface %s.\n", | |
2194 | bond_dev->name, | |
2195 | slave_dev->name); | |
2196 | ||
2197 | /* notify ad that the link status has changed */ | |
2198 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2199 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2200 | } | |
2201 | ||
2202 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2203 | (bond->params.mode == BOND_MODE_ALB)) { | |
2204 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2205 | } | |
2206 | ||
2207 | if ((!oldcurrent) || | |
2208 | (slave == bond->primary_slave)) { | |
2209 | do_failover = 1; | |
2210 | } | |
2211 | } else { | |
2212 | slave->delay--; | |
2213 | } | |
2214 | } | |
2215 | break; | |
2216 | default: | |
2217 | /* Should not happen */ | |
4e0952c7 MW |
2218 | printk(KERN_ERR DRV_NAME |
2219 | ": %s: Error: %s Illegal value (link=%d)\n", | |
2220 | bond_dev->name, | |
2221 | slave->dev->name, | |
2222 | slave->link); | |
1da177e4 LT |
2223 | goto out; |
2224 | } /* end of switch (slave->link) */ | |
2225 | ||
2226 | bond_update_speed_duplex(slave); | |
2227 | ||
2228 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2229 | if (old_speed != slave->speed) { | |
2230 | bond_3ad_adapter_speed_changed(slave); | |
2231 | } | |
2232 | ||
2233 | if (old_duplex != slave->duplex) { | |
2234 | bond_3ad_adapter_duplex_changed(slave); | |
2235 | } | |
2236 | } | |
2237 | ||
2238 | } /* end of for */ | |
2239 | ||
2240 | if (do_failover) { | |
2241 | write_lock(&bond->curr_slave_lock); | |
2242 | ||
2243 | bond_select_active_slave(bond); | |
2244 | ||
1da177e4 | 2245 | write_unlock(&bond->curr_slave_lock); |
ff59c456 JV |
2246 | } else |
2247 | bond_set_carrier(bond); | |
1da177e4 LT |
2248 | |
2249 | re_arm: | |
2250 | if (bond->params.miimon) { | |
2251 | mod_timer(&bond->mii_timer, jiffies + delta_in_ticks); | |
2252 | } | |
2253 | out: | |
2254 | read_unlock(&bond->lock); | |
2255 | } | |
2256 | ||
c3ade5ca JV |
2257 | |
2258 | static u32 bond_glean_dev_ip(struct net_device *dev) | |
2259 | { | |
2260 | struct in_device *idev; | |
2261 | struct in_ifaddr *ifa; | |
a144ea4b | 2262 | __be32 addr = 0; |
c3ade5ca JV |
2263 | |
2264 | if (!dev) | |
2265 | return 0; | |
2266 | ||
2267 | rcu_read_lock(); | |
e5ed6399 | 2268 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2269 | if (!idev) |
2270 | goto out; | |
2271 | ||
2272 | ifa = idev->ifa_list; | |
2273 | if (!ifa) | |
2274 | goto out; | |
2275 | ||
2276 | addr = ifa->ifa_local; | |
2277 | out: | |
2278 | rcu_read_unlock(); | |
2279 | return addr; | |
2280 | } | |
2281 | ||
2282 | static int bond_has_ip(struct bonding *bond) | |
2283 | { | |
2284 | struct vlan_entry *vlan, *vlan_next; | |
2285 | ||
2286 | if (bond->master_ip) | |
2287 | return 1; | |
2288 | ||
2289 | if (list_empty(&bond->vlan_list)) | |
2290 | return 0; | |
2291 | ||
2292 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2293 | vlan_list) { | |
2294 | if (vlan->vlan_ip) | |
2295 | return 1; | |
2296 | } | |
2297 | ||
2298 | return 0; | |
2299 | } | |
2300 | ||
f5b2b966 JV |
2301 | static int bond_has_this_ip(struct bonding *bond, u32 ip) |
2302 | { | |
2303 | struct vlan_entry *vlan, *vlan_next; | |
2304 | ||
2305 | if (ip == bond->master_ip) | |
2306 | return 1; | |
2307 | ||
2308 | if (list_empty(&bond->vlan_list)) | |
2309 | return 0; | |
2310 | ||
2311 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2312 | vlan_list) { | |
2313 | if (ip == vlan->vlan_ip) | |
2314 | return 1; | |
2315 | } | |
2316 | ||
2317 | return 0; | |
2318 | } | |
2319 | ||
c3ade5ca JV |
2320 | /* |
2321 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2322 | * switches in VLAN mode (especially if ports are configured as | |
2323 | * "native" to a VLAN) might not pass non-tagged frames. | |
2324 | */ | |
2325 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, u32 dest_ip, u32 src_ip, unsigned short vlan_id) | |
2326 | { | |
2327 | struct sk_buff *skb; | |
2328 | ||
2329 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2330 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2331 | ||
2332 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2333 | NULL, slave_dev->dev_addr, NULL); | |
2334 | ||
2335 | if (!skb) { | |
2336 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2337 | return; | |
2338 | } | |
2339 | if (vlan_id) { | |
2340 | skb = vlan_put_tag(skb, vlan_id); | |
2341 | if (!skb) { | |
2342 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2343 | return; | |
2344 | } | |
2345 | } | |
2346 | arp_xmit(skb); | |
2347 | } | |
2348 | ||
2349 | ||
1da177e4 LT |
2350 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2351 | { | |
c3ade5ca | 2352 | int i, vlan_id, rv; |
1da177e4 | 2353 | u32 *targets = bond->params.arp_targets; |
c3ade5ca JV |
2354 | struct vlan_entry *vlan, *vlan_next; |
2355 | struct net_device *vlan_dev; | |
2356 | struct flowi fl; | |
2357 | struct rtable *rt; | |
1da177e4 | 2358 | |
6b780567 MW |
2359 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2360 | if (!targets[i]) | |
2361 | continue; | |
c3ade5ca JV |
2362 | dprintk("basa: target %x\n", targets[i]); |
2363 | if (list_empty(&bond->vlan_list)) { | |
2364 | dprintk("basa: empty vlan: arp_send\n"); | |
2365 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2366 | bond->master_ip, 0); | |
2367 | continue; | |
2368 | } | |
2369 | ||
2370 | /* | |
2371 | * If VLANs are configured, we do a route lookup to | |
2372 | * determine which VLAN interface would be used, so we | |
2373 | * can tag the ARP with the proper VLAN tag. | |
2374 | */ | |
2375 | memset(&fl, 0, sizeof(fl)); | |
2376 | fl.fl4_dst = targets[i]; | |
2377 | fl.fl4_tos = RTO_ONLINK; | |
2378 | ||
2379 | rv = ip_route_output_key(&rt, &fl); | |
2380 | if (rv) { | |
2381 | if (net_ratelimit()) { | |
2382 | printk(KERN_WARNING DRV_NAME | |
2383 | ": %s: no route to arp_ip_target %u.%u.%u.%u\n", | |
2384 | bond->dev->name, NIPQUAD(fl.fl4_dst)); | |
2385 | } | |
2386 | continue; | |
2387 | } | |
2388 | ||
2389 | /* | |
2390 | * This target is not on a VLAN | |
2391 | */ | |
2392 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2393 | ip_rt_put(rt); |
c3ade5ca JV |
2394 | dprintk("basa: rtdev == bond->dev: arp_send\n"); |
2395 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2396 | bond->master_ip, 0); | |
2397 | continue; | |
2398 | } | |
2399 | ||
2400 | vlan_id = 0; | |
2401 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
2402 | vlan_list) { | |
2403 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2404 | if (vlan_dev == rt->u.dst.dev) { | |
2405 | vlan_id = vlan->vlan_id; | |
2406 | dprintk("basa: vlan match on %s %d\n", | |
2407 | vlan_dev->name, vlan_id); | |
2408 | break; | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | if (vlan_id) { | |
ed4b9f80 | 2413 | ip_rt_put(rt); |
c3ade5ca JV |
2414 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2415 | vlan->vlan_ip, vlan_id); | |
2416 | continue; | |
2417 | } | |
2418 | ||
2419 | if (net_ratelimit()) { | |
2420 | printk(KERN_WARNING DRV_NAME | |
2421 | ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n", | |
2422 | bond->dev->name, NIPQUAD(fl.fl4_dst), | |
2423 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
2424 | } | |
ed4b9f80 | 2425 | ip_rt_put(rt); |
c3ade5ca JV |
2426 | } |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2431 | * for each VLAN above us. | |
2432 | */ | |
2433 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2434 | { | |
2435 | struct slave *slave = bond->curr_active_slave; | |
2436 | struct vlan_entry *vlan; | |
2437 | struct net_device *vlan_dev; | |
2438 | ||
2439 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2440 | slave ? slave->dev->name : "NULL"); | |
2441 | if (!slave) | |
2442 | return; | |
2443 | ||
2444 | if (bond->master_ip) { | |
2445 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
2446 | bond->master_ip, 0); | |
2447 | } | |
2448 | ||
2449 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
2450 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
2451 | if (vlan->vlan_ip) { | |
2452 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2453 | vlan->vlan_ip, vlan->vlan_id); | |
2454 | } | |
1da177e4 LT |
2455 | } |
2456 | } | |
2457 | ||
f5b2b966 JV |
2458 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, u32 sip, u32 tip) |
2459 | { | |
2460 | int i; | |
2461 | u32 *targets = bond->params.arp_targets; | |
2462 | ||
2463 | targets = bond->params.arp_targets; | |
2464 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
2465 | dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] " | |
2466 | "%u.%u.%u.%u bhti(tip) %d\n", | |
2467 | NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]), | |
2468 | bond_has_this_ip(bond, tip)); | |
2469 | if (sip == targets[i]) { | |
2470 | if (bond_has_this_ip(bond, tip)) | |
2471 | slave->last_arp_rx = jiffies; | |
2472 | return; | |
2473 | } | |
2474 | } | |
2475 | } | |
2476 | ||
2477 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2478 | { | |
2479 | struct arphdr *arp; | |
2480 | struct slave *slave; | |
2481 | struct bonding *bond; | |
2482 | unsigned char *arp_ptr; | |
2483 | u32 sip, tip; | |
2484 | ||
2485 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) | |
2486 | goto out; | |
2487 | ||
2488 | bond = dev->priv; | |
2489 | read_lock(&bond->lock); | |
2490 | ||
2491 | dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", | |
2492 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", | |
2493 | orig_dev ? orig_dev->name : "NULL"); | |
2494 | ||
2495 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2496 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2497 | goto out_unlock; | |
2498 | ||
2499 | /* ARP header, plus 2 device addresses, plus 2 IP addresses. */ | |
2500 | if (!pskb_may_pull(skb, (sizeof(struct arphdr) + | |
2501 | (2 * dev->addr_len) + | |
2502 | (2 * sizeof(u32))))) | |
2503 | goto out_unlock; | |
2504 | ||
2505 | arp = skb->nh.arph; | |
2506 | if (arp->ar_hln != dev->addr_len || | |
2507 | skb->pkt_type == PACKET_OTHERHOST || | |
2508 | skb->pkt_type == PACKET_LOOPBACK || | |
2509 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2510 | arp->ar_pro != htons(ETH_P_IP) || | |
2511 | arp->ar_pln != 4) | |
2512 | goto out_unlock; | |
2513 | ||
2514 | arp_ptr = (unsigned char *)(arp + 1); | |
2515 | arp_ptr += dev->addr_len; | |
2516 | memcpy(&sip, arp_ptr, 4); | |
2517 | arp_ptr += 4 + dev->addr_len; | |
2518 | memcpy(&tip, arp_ptr, 4); | |
2519 | ||
2520 | dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u" | |
2521 | " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name, | |
2522 | slave->state, bond->params.arp_validate, | |
2523 | slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip)); | |
2524 | ||
2525 | /* | |
2526 | * Backup slaves won't see the ARP reply, but do come through | |
2527 | * here for each ARP probe (so we swap the sip/tip to validate | |
2528 | * the probe). In a "redundant switch, common router" type of | |
2529 | * configuration, the ARP probe will (hopefully) travel from | |
2530 | * the active, through one switch, the router, then the other | |
2531 | * switch before reaching the backup. | |
2532 | */ | |
2533 | if (slave->state == BOND_STATE_ACTIVE) | |
2534 | bond_validate_arp(bond, slave, sip, tip); | |
2535 | else | |
2536 | bond_validate_arp(bond, slave, tip, sip); | |
2537 | ||
2538 | out_unlock: | |
2539 | read_unlock(&bond->lock); | |
2540 | out: | |
2541 | dev_kfree_skb(skb); | |
2542 | return NET_RX_SUCCESS; | |
2543 | } | |
2544 | ||
1da177e4 LT |
2545 | /* |
2546 | * this function is called regularly to monitor each slave's link | |
2547 | * ensuring that traffic is being sent and received when arp monitoring | |
2548 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2549 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2550 | * arp monitoring in active backup mode. | |
2551 | */ | |
a77b5325 | 2552 | void bond_loadbalance_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2553 | { |
2554 | struct bonding *bond = bond_dev->priv; | |
2555 | struct slave *slave, *oldcurrent; | |
2556 | int do_failover = 0; | |
2557 | int delta_in_ticks; | |
2558 | int i; | |
2559 | ||
2560 | read_lock(&bond->lock); | |
2561 | ||
2562 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2563 | ||
2564 | if (bond->kill_timers) { | |
2565 | goto out; | |
2566 | } | |
2567 | ||
2568 | if (bond->slave_cnt == 0) { | |
2569 | goto re_arm; | |
2570 | } | |
2571 | ||
2572 | read_lock(&bond->curr_slave_lock); | |
2573 | oldcurrent = bond->curr_active_slave; | |
2574 | read_unlock(&bond->curr_slave_lock); | |
2575 | ||
2576 | /* see if any of the previous devices are up now (i.e. they have | |
2577 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2578 | * the picture unless it is null. also, slave->jiffies is not needed | |
2579 | * here because we send an arp on each slave and give a slave as | |
2580 | * long as it needs to get the tx/rx within the delta. | |
2581 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2582 | * so it can wait | |
2583 | */ | |
2584 | bond_for_each_slave(bond, slave, i) { | |
2585 | if (slave->link != BOND_LINK_UP) { | |
2586 | if (((jiffies - slave->dev->trans_start) <= delta_in_ticks) && | |
2587 | ((jiffies - slave->dev->last_rx) <= delta_in_ticks)) { | |
2588 | ||
2589 | slave->link = BOND_LINK_UP; | |
2590 | slave->state = BOND_STATE_ACTIVE; | |
2591 | ||
2592 | /* primary_slave has no meaning in round-robin | |
2593 | * mode. the window of a slave being up and | |
2594 | * curr_active_slave being null after enslaving | |
2595 | * is closed. | |
2596 | */ | |
2597 | if (!oldcurrent) { | |
2598 | printk(KERN_INFO DRV_NAME | |
2599 | ": %s: link status definitely " | |
2600 | "up for interface %s, ", | |
2601 | bond_dev->name, | |
2602 | slave->dev->name); | |
2603 | do_failover = 1; | |
2604 | } else { | |
2605 | printk(KERN_INFO DRV_NAME | |
2606 | ": %s: interface %s is now up\n", | |
2607 | bond_dev->name, | |
2608 | slave->dev->name); | |
2609 | } | |
2610 | } | |
2611 | } else { | |
2612 | /* slave->link == BOND_LINK_UP */ | |
2613 | ||
2614 | /* not all switches will respond to an arp request | |
2615 | * when the source ip is 0, so don't take the link down | |
2616 | * if we don't know our ip yet | |
2617 | */ | |
2618 | if (((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
2619 | (((jiffies - slave->dev->last_rx) >= (2*delta_in_ticks)) && | |
c3ade5ca | 2620 | bond_has_ip(bond))) { |
1da177e4 LT |
2621 | |
2622 | slave->link = BOND_LINK_DOWN; | |
2623 | slave->state = BOND_STATE_BACKUP; | |
2624 | ||
2625 | if (slave->link_failure_count < UINT_MAX) { | |
2626 | slave->link_failure_count++; | |
2627 | } | |
2628 | ||
2629 | printk(KERN_INFO DRV_NAME | |
2630 | ": %s: interface %s is now down.\n", | |
2631 | bond_dev->name, | |
2632 | slave->dev->name); | |
2633 | ||
2634 | if (slave == oldcurrent) { | |
2635 | do_failover = 1; | |
2636 | } | |
2637 | } | |
2638 | } | |
2639 | ||
2640 | /* note: if switch is in round-robin mode, all links | |
2641 | * must tx arp to ensure all links rx an arp - otherwise | |
2642 | * links may oscillate or not come up at all; if switch is | |
2643 | * in something like xor mode, there is nothing we can | |
2644 | * do - all replies will be rx'ed on same link causing slaves | |
2645 | * to be unstable during low/no traffic periods | |
2646 | */ | |
2647 | if (IS_UP(slave->dev)) { | |
2648 | bond_arp_send_all(bond, slave); | |
2649 | } | |
2650 | } | |
2651 | ||
2652 | if (do_failover) { | |
2653 | write_lock(&bond->curr_slave_lock); | |
2654 | ||
2655 | bond_select_active_slave(bond); | |
2656 | ||
1da177e4 LT |
2657 | write_unlock(&bond->curr_slave_lock); |
2658 | } | |
2659 | ||
2660 | re_arm: | |
2661 | if (bond->params.arp_interval) { | |
2662 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2663 | } | |
2664 | out: | |
2665 | read_unlock(&bond->lock); | |
2666 | } | |
2667 | ||
2668 | /* | |
2669 | * When using arp monitoring in active-backup mode, this function is | |
2670 | * called to determine if any backup slaves have went down or a new | |
2671 | * current slave needs to be found. | |
2672 | * The backup slaves never generate traffic, they are considered up by merely | |
2673 | * receiving traffic. If the current slave goes down, each backup slave will | |
2674 | * be given the opportunity to tx/rx an arp before being taken down - this | |
2675 | * prevents all slaves from being taken down due to the current slave not | |
2676 | * sending any traffic for the backups to receive. The arps are not necessarily | |
2677 | * necessary, any tx and rx traffic will keep the current slave up. While any | |
2678 | * rx traffic will keep the backup slaves up, the current slave is responsible | |
2679 | * for generating traffic to keep them up regardless of any other traffic they | |
2680 | * may have received. | |
2681 | * see loadbalance_arp_monitor for arp monitoring in load balancing mode | |
2682 | */ | |
a77b5325 | 2683 | void bond_activebackup_arp_mon(struct net_device *bond_dev) |
1da177e4 LT |
2684 | { |
2685 | struct bonding *bond = bond_dev->priv; | |
2686 | struct slave *slave; | |
2687 | int delta_in_ticks; | |
2688 | int i; | |
2689 | ||
2690 | read_lock(&bond->lock); | |
2691 | ||
2692 | delta_in_ticks = (bond->params.arp_interval * HZ) / 1000; | |
2693 | ||
2694 | if (bond->kill_timers) { | |
2695 | goto out; | |
2696 | } | |
2697 | ||
2698 | if (bond->slave_cnt == 0) { | |
2699 | goto re_arm; | |
2700 | } | |
2701 | ||
2702 | /* determine if any slave has come up or any backup slave has | |
2703 | * gone down | |
2704 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2705 | * so it can wait | |
2706 | */ | |
2707 | bond_for_each_slave(bond, slave, i) { | |
2708 | if (slave->link != BOND_LINK_UP) { | |
f5b2b966 JV |
2709 | if ((jiffies - slave_last_rx(bond, slave)) <= |
2710 | delta_in_ticks) { | |
1da177e4 LT |
2711 | |
2712 | slave->link = BOND_LINK_UP; | |
2713 | ||
2714 | write_lock(&bond->curr_slave_lock); | |
2715 | ||
2716 | if ((!bond->curr_active_slave) && | |
2717 | ((jiffies - slave->dev->trans_start) <= delta_in_ticks)) { | |
2718 | bond_change_active_slave(bond, slave); | |
2719 | bond->current_arp_slave = NULL; | |
2720 | } else if (bond->curr_active_slave != slave) { | |
2721 | /* this slave has just come up but we | |
2722 | * already have a current slave; this | |
2723 | * can also happen if bond_enslave adds | |
2724 | * a new slave that is up while we are | |
2725 | * searching for a new slave | |
2726 | */ | |
2727 | bond_set_slave_inactive_flags(slave); | |
2728 | bond->current_arp_slave = NULL; | |
2729 | } | |
2730 | ||
ff59c456 JV |
2731 | bond_set_carrier(bond); |
2732 | ||
1da177e4 LT |
2733 | if (slave == bond->curr_active_slave) { |
2734 | printk(KERN_INFO DRV_NAME | |
2735 | ": %s: %s is up and now the " | |
2736 | "active interface\n", | |
2737 | bond_dev->name, | |
2738 | slave->dev->name); | |
ff59c456 | 2739 | netif_carrier_on(bond->dev); |
1da177e4 LT |
2740 | } else { |
2741 | printk(KERN_INFO DRV_NAME | |
2742 | ": %s: backup interface %s is " | |
2743 | "now up\n", | |
2744 | bond_dev->name, | |
2745 | slave->dev->name); | |
2746 | } | |
2747 | ||
2748 | write_unlock(&bond->curr_slave_lock); | |
2749 | } | |
2750 | } else { | |
2751 | read_lock(&bond->curr_slave_lock); | |
2752 | ||
2753 | if ((slave != bond->curr_active_slave) && | |
2754 | (!bond->current_arp_slave) && | |
f5b2b966 | 2755 | (((jiffies - slave_last_rx(bond, slave)) >= 3*delta_in_ticks) && |
c3ade5ca | 2756 | bond_has_ip(bond))) { |
1da177e4 LT |
2757 | /* a backup slave has gone down; three times |
2758 | * the delta allows the current slave to be | |
2759 | * taken out before the backup slave. | |
2760 | * note: a non-null current_arp_slave indicates | |
2761 | * the curr_active_slave went down and we are | |
2762 | * searching for a new one; under this | |
2763 | * condition we only take the curr_active_slave | |
2764 | * down - this gives each slave a chance to | |
2765 | * tx/rx traffic before being taken out | |
2766 | */ | |
2767 | ||
2768 | read_unlock(&bond->curr_slave_lock); | |
2769 | ||
2770 | slave->link = BOND_LINK_DOWN; | |
2771 | ||
2772 | if (slave->link_failure_count < UINT_MAX) { | |
2773 | slave->link_failure_count++; | |
2774 | } | |
2775 | ||
2776 | bond_set_slave_inactive_flags(slave); | |
2777 | ||
2778 | printk(KERN_INFO DRV_NAME | |
2779 | ": %s: backup interface %s is now down\n", | |
2780 | bond_dev->name, | |
2781 | slave->dev->name); | |
2782 | } else { | |
2783 | read_unlock(&bond->curr_slave_lock); | |
2784 | } | |
2785 | } | |
2786 | } | |
2787 | ||
2788 | read_lock(&bond->curr_slave_lock); | |
2789 | slave = bond->curr_active_slave; | |
2790 | read_unlock(&bond->curr_slave_lock); | |
2791 | ||
2792 | if (slave) { | |
2793 | /* if we have sent traffic in the past 2*arp_intervals but | |
2794 | * haven't xmit and rx traffic in that time interval, select | |
2795 | * a different slave. slave->jiffies is only updated when | |
2796 | * a slave first becomes the curr_active_slave - not necessarily | |
2797 | * after every arp; this ensures the slave has a full 2*delta | |
2798 | * before being taken out. if a primary is being used, check | |
2799 | * if it is up and needs to take over as the curr_active_slave | |
2800 | */ | |
2801 | if ((((jiffies - slave->dev->trans_start) >= (2*delta_in_ticks)) || | |
f5b2b966 | 2802 | (((jiffies - slave_last_rx(bond, slave)) >= (2*delta_in_ticks)) && |
c3ade5ca | 2803 | bond_has_ip(bond))) && |
1da177e4 LT |
2804 | ((jiffies - slave->jiffies) >= 2*delta_in_ticks)) { |
2805 | ||
2806 | slave->link = BOND_LINK_DOWN; | |
2807 | ||
2808 | if (slave->link_failure_count < UINT_MAX) { | |
2809 | slave->link_failure_count++; | |
2810 | } | |
2811 | ||
2812 | printk(KERN_INFO DRV_NAME | |
2813 | ": %s: link status down for active interface " | |
2814 | "%s, disabling it\n", | |
2815 | bond_dev->name, | |
2816 | slave->dev->name); | |
2817 | ||
2818 | write_lock(&bond->curr_slave_lock); | |
2819 | ||
2820 | bond_select_active_slave(bond); | |
2821 | slave = bond->curr_active_slave; | |
2822 | ||
2823 | write_unlock(&bond->curr_slave_lock); | |
2824 | ||
2825 | bond->current_arp_slave = slave; | |
2826 | ||
2827 | if (slave) { | |
2828 | slave->jiffies = jiffies; | |
2829 | } | |
2830 | } else if ((bond->primary_slave) && | |
2831 | (bond->primary_slave != slave) && | |
2832 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
2833 | /* at this point, slave is the curr_active_slave */ | |
2834 | printk(KERN_INFO DRV_NAME | |
2835 | ": %s: changing from interface %s to primary " | |
2836 | "interface %s\n", | |
2837 | bond_dev->name, | |
2838 | slave->dev->name, | |
2839 | bond->primary_slave->dev->name); | |
2840 | ||
2841 | /* primary is up so switch to it */ | |
2842 | write_lock(&bond->curr_slave_lock); | |
2843 | bond_change_active_slave(bond, bond->primary_slave); | |
2844 | write_unlock(&bond->curr_slave_lock); | |
2845 | ||
2846 | slave = bond->primary_slave; | |
2847 | slave->jiffies = jiffies; | |
2848 | } else { | |
2849 | bond->current_arp_slave = NULL; | |
2850 | } | |
2851 | ||
2852 | /* the current slave must tx an arp to ensure backup slaves | |
2853 | * rx traffic | |
2854 | */ | |
c3ade5ca | 2855 | if (slave && bond_has_ip(bond)) { |
1da177e4 LT |
2856 | bond_arp_send_all(bond, slave); |
2857 | } | |
2858 | } | |
2859 | ||
2860 | /* if we don't have a curr_active_slave, search for the next available | |
2861 | * backup slave from the current_arp_slave and make it the candidate | |
2862 | * for becoming the curr_active_slave | |
2863 | */ | |
2864 | if (!slave) { | |
2865 | if (!bond->current_arp_slave) { | |
2866 | bond->current_arp_slave = bond->first_slave; | |
2867 | } | |
2868 | ||
2869 | if (bond->current_arp_slave) { | |
2870 | bond_set_slave_inactive_flags(bond->current_arp_slave); | |
2871 | ||
2872 | /* search for next candidate */ | |
2f872f04 | 2873 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { |
1da177e4 LT |
2874 | if (IS_UP(slave->dev)) { |
2875 | slave->link = BOND_LINK_BACK; | |
2876 | bond_set_slave_active_flags(slave); | |
2877 | bond_arp_send_all(bond, slave); | |
2878 | slave->jiffies = jiffies; | |
2879 | bond->current_arp_slave = slave; | |
2880 | break; | |
2881 | } | |
2882 | ||
2883 | /* if the link state is up at this point, we | |
2884 | * mark it down - this can happen if we have | |
2885 | * simultaneous link failures and | |
2886 | * reselect_active_interface doesn't make this | |
2887 | * one the current slave so it is still marked | |
2888 | * up when it is actually down | |
2889 | */ | |
2890 | if (slave->link == BOND_LINK_UP) { | |
2891 | slave->link = BOND_LINK_DOWN; | |
2892 | if (slave->link_failure_count < UINT_MAX) { | |
2893 | slave->link_failure_count++; | |
2894 | } | |
2895 | ||
2896 | bond_set_slave_inactive_flags(slave); | |
2897 | ||
2898 | printk(KERN_INFO DRV_NAME | |
2899 | ": %s: backup interface %s is " | |
2900 | "now down.\n", | |
2901 | bond_dev->name, | |
2902 | slave->dev->name); | |
2903 | } | |
2904 | } | |
2905 | } | |
2906 | } | |
2907 | ||
2908 | re_arm: | |
2909 | if (bond->params.arp_interval) { | |
2910 | mod_timer(&bond->arp_timer, jiffies + delta_in_ticks); | |
2911 | } | |
2912 | out: | |
2913 | read_unlock(&bond->lock); | |
2914 | } | |
2915 | ||
2916 | /*------------------------------ proc/seq_file-------------------------------*/ | |
2917 | ||
2918 | #ifdef CONFIG_PROC_FS | |
2919 | ||
2920 | #define SEQ_START_TOKEN ((void *)1) | |
2921 | ||
2922 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) | |
2923 | { | |
2924 | struct bonding *bond = seq->private; | |
2925 | loff_t off = 0; | |
2926 | struct slave *slave; | |
2927 | int i; | |
2928 | ||
2929 | /* make sure the bond won't be taken away */ | |
2930 | read_lock(&dev_base_lock); | |
2931 | read_lock_bh(&bond->lock); | |
2932 | ||
2933 | if (*pos == 0) { | |
2934 | return SEQ_START_TOKEN; | |
2935 | } | |
2936 | ||
2937 | bond_for_each_slave(bond, slave, i) { | |
2938 | if (++off == *pos) { | |
2939 | return slave; | |
2940 | } | |
2941 | } | |
2942 | ||
2943 | return NULL; | |
2944 | } | |
2945 | ||
2946 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
2947 | { | |
2948 | struct bonding *bond = seq->private; | |
2949 | struct slave *slave = v; | |
2950 | ||
2951 | ++*pos; | |
2952 | if (v == SEQ_START_TOKEN) { | |
2953 | return bond->first_slave; | |
2954 | } | |
2955 | ||
2956 | slave = slave->next; | |
2957 | ||
2958 | return (slave == bond->first_slave) ? NULL : slave; | |
2959 | } | |
2960 | ||
2961 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
2962 | { | |
2963 | struct bonding *bond = seq->private; | |
2964 | ||
2965 | read_unlock_bh(&bond->lock); | |
2966 | read_unlock(&dev_base_lock); | |
2967 | } | |
2968 | ||
2969 | static void bond_info_show_master(struct seq_file *seq) | |
2970 | { | |
2971 | struct bonding *bond = seq->private; | |
2972 | struct slave *curr; | |
4756b02f MW |
2973 | int i; |
2974 | u32 target; | |
1da177e4 LT |
2975 | |
2976 | read_lock(&bond->curr_slave_lock); | |
2977 | curr = bond->curr_active_slave; | |
2978 | read_unlock(&bond->curr_slave_lock); | |
2979 | ||
2980 | seq_printf(seq, "Bonding Mode: %s\n", | |
2981 | bond_mode_name(bond->params.mode)); | |
2982 | ||
c61b75ad MW |
2983 | if (bond->params.mode == BOND_MODE_XOR || |
2984 | bond->params.mode == BOND_MODE_8023AD) { | |
2985 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
2986 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
2987 | bond->params.xmit_policy); | |
2988 | } | |
2989 | ||
1da177e4 LT |
2990 | if (USES_PRIMARY(bond->params.mode)) { |
2991 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
2992 | (bond->primary_slave) ? |
2993 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
2994 | |
2995 | seq_printf(seq, "Currently Active Slave: %s\n", | |
2996 | (curr) ? curr->dev->name : "None"); | |
2997 | } | |
2998 | ||
ff59c456 JV |
2999 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3000 | "up" : "down"); | |
1da177e4 LT |
3001 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3002 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3003 | bond->params.updelay * bond->params.miimon); | |
3004 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3005 | bond->params.downdelay * bond->params.miimon); | |
3006 | ||
4756b02f MW |
3007 | |
3008 | /* ARP information */ | |
3009 | if(bond->params.arp_interval > 0) { | |
3010 | int printed=0; | |
3011 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", | |
3012 | bond->params.arp_interval); | |
3013 | ||
3014 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3015 | ||
3016 | for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) { | |
3017 | if (!bond->params.arp_targets[i]) | |
3018 | continue; | |
3019 | if (printed) | |
3020 | seq_printf(seq, ","); | |
3021 | target = ntohl(bond->params.arp_targets[i]); | |
3022 | seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target)); | |
3023 | printed = 1; | |
3024 | } | |
3025 | seq_printf(seq, "\n"); | |
3026 | } | |
3027 | ||
1da177e4 LT |
3028 | if (bond->params.mode == BOND_MODE_8023AD) { |
3029 | struct ad_info ad_info; | |
3030 | ||
3031 | seq_puts(seq, "\n802.3ad info\n"); | |
3032 | seq_printf(seq, "LACP rate: %s\n", | |
3033 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
3034 | ||
3035 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3036 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3037 | bond->dev->name); | |
3038 | } else { | |
3039 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3040 | ||
3041 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3042 | ad_info.aggregator_id); | |
3043 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3044 | ad_info.ports); | |
3045 | seq_printf(seq, "\tActor Key: %d\n", | |
3046 | ad_info.actor_key); | |
3047 | seq_printf(seq, "\tPartner Key: %d\n", | |
3048 | ad_info.partner_key); | |
3049 | seq_printf(seq, "\tPartner Mac Address: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3050 | ad_info.partner_system[0], | |
3051 | ad_info.partner_system[1], | |
3052 | ad_info.partner_system[2], | |
3053 | ad_info.partner_system[3], | |
3054 | ad_info.partner_system[4], | |
3055 | ad_info.partner_system[5]); | |
3056 | } | |
3057 | } | |
3058 | } | |
3059 | ||
3060 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3061 | { | |
3062 | struct bonding *bond = seq->private; | |
3063 | ||
3064 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3065 | seq_printf(seq, "MII Status: %s\n", | |
3066 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3067 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3068 | slave->link_failure_count); |
3069 | ||
217df670 JV |
3070 | seq_printf(seq, |
3071 | "Permanent HW addr: %02x:%02x:%02x:%02x:%02x:%02x\n", | |
3072 | slave->perm_hwaddr[0], slave->perm_hwaddr[1], | |
3073 | slave->perm_hwaddr[2], slave->perm_hwaddr[3], | |
3074 | slave->perm_hwaddr[4], slave->perm_hwaddr[5]); | |
1da177e4 LT |
3075 | |
3076 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3077 | const struct aggregator *agg | |
3078 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3079 | ||
3080 | if (agg) { | |
3081 | seq_printf(seq, "Aggregator ID: %d\n", | |
3082 | agg->aggregator_identifier); | |
3083 | } else { | |
3084 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3085 | } | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3090 | { | |
3091 | if (v == SEQ_START_TOKEN) { | |
3092 | seq_printf(seq, "%s\n", version); | |
3093 | bond_info_show_master(seq); | |
3094 | } else { | |
3095 | bond_info_show_slave(seq, v); | |
3096 | } | |
3097 | ||
3098 | return 0; | |
3099 | } | |
3100 | ||
3101 | static struct seq_operations bond_info_seq_ops = { | |
3102 | .start = bond_info_seq_start, | |
3103 | .next = bond_info_seq_next, | |
3104 | .stop = bond_info_seq_stop, | |
3105 | .show = bond_info_seq_show, | |
3106 | }; | |
3107 | ||
3108 | static int bond_info_open(struct inode *inode, struct file *file) | |
3109 | { | |
3110 | struct seq_file *seq; | |
3111 | struct proc_dir_entry *proc; | |
3112 | int res; | |
3113 | ||
3114 | res = seq_open(file, &bond_info_seq_ops); | |
3115 | if (!res) { | |
3116 | /* recover the pointer buried in proc_dir_entry data */ | |
3117 | seq = file->private_data; | |
3118 | proc = PDE(inode); | |
3119 | seq->private = proc->data; | |
3120 | } | |
3121 | ||
3122 | return res; | |
3123 | } | |
3124 | ||
3125 | static struct file_operations bond_info_fops = { | |
3126 | .owner = THIS_MODULE, | |
3127 | .open = bond_info_open, | |
3128 | .read = seq_read, | |
3129 | .llseek = seq_lseek, | |
3130 | .release = seq_release, | |
3131 | }; | |
3132 | ||
3133 | static int bond_create_proc_entry(struct bonding *bond) | |
3134 | { | |
3135 | struct net_device *bond_dev = bond->dev; | |
3136 | ||
3137 | if (bond_proc_dir) { | |
3138 | bond->proc_entry = create_proc_entry(bond_dev->name, | |
3139 | S_IRUGO, | |
3140 | bond_proc_dir); | |
3141 | if (bond->proc_entry == NULL) { | |
3142 | printk(KERN_WARNING DRV_NAME | |
3143 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3144 | DRV_NAME, bond_dev->name); | |
3145 | } else { | |
3146 | bond->proc_entry->data = bond; | |
3147 | bond->proc_entry->proc_fops = &bond_info_fops; | |
3148 | bond->proc_entry->owner = THIS_MODULE; | |
3149 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); | |
3150 | } | |
3151 | } | |
3152 | ||
3153 | return 0; | |
3154 | } | |
3155 | ||
3156 | static void bond_remove_proc_entry(struct bonding *bond) | |
3157 | { | |
3158 | if (bond_proc_dir && bond->proc_entry) { | |
3159 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3160 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3161 | bond->proc_entry = NULL; | |
3162 | } | |
3163 | } | |
3164 | ||
3165 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3166 | * Caller must hold rtnl_lock. | |
3167 | */ | |
3168 | static void bond_create_proc_dir(void) | |
3169 | { | |
3170 | int len = strlen(DRV_NAME); | |
3171 | ||
3172 | for (bond_proc_dir = proc_net->subdir; bond_proc_dir; | |
3173 | bond_proc_dir = bond_proc_dir->next) { | |
3174 | if ((bond_proc_dir->namelen == len) && | |
3175 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3176 | break; | |
3177 | } | |
3178 | } | |
3179 | ||
3180 | if (!bond_proc_dir) { | |
3181 | bond_proc_dir = proc_mkdir(DRV_NAME, proc_net); | |
3182 | if (bond_proc_dir) { | |
3183 | bond_proc_dir->owner = THIS_MODULE; | |
3184 | } else { | |
3185 | printk(KERN_WARNING DRV_NAME | |
3186 | ": Warning: cannot create /proc/net/%s\n", | |
3187 | DRV_NAME); | |
3188 | } | |
3189 | } | |
3190 | } | |
3191 | ||
3192 | /* Destroy the bonding directory under /proc/net, if empty. | |
3193 | * Caller must hold rtnl_lock. | |
3194 | */ | |
3195 | static void bond_destroy_proc_dir(void) | |
3196 | { | |
3197 | struct proc_dir_entry *de; | |
3198 | ||
3199 | if (!bond_proc_dir) { | |
3200 | return; | |
3201 | } | |
3202 | ||
3203 | /* verify that the /proc dir is empty */ | |
3204 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3205 | /* ignore . and .. */ | |
3206 | if (*(de->name) != '.') { | |
3207 | break; | |
3208 | } | |
3209 | } | |
3210 | ||
3211 | if (de) { | |
3212 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3213 | bond_proc_dir->owner = NULL; | |
3214 | } | |
3215 | } else { | |
3216 | remove_proc_entry(DRV_NAME, proc_net); | |
3217 | bond_proc_dir = NULL; | |
3218 | } | |
3219 | } | |
3220 | #endif /* CONFIG_PROC_FS */ | |
3221 | ||
3222 | /*-------------------------- netdev event handling --------------------------*/ | |
3223 | ||
3224 | /* | |
3225 | * Change device name | |
3226 | */ | |
3227 | static int bond_event_changename(struct bonding *bond) | |
3228 | { | |
3229 | #ifdef CONFIG_PROC_FS | |
3230 | bond_remove_proc_entry(bond); | |
3231 | bond_create_proc_entry(bond); | |
3232 | #endif | |
b76cdba9 MW |
3233 | down_write(&(bonding_rwsem)); |
3234 | bond_destroy_sysfs_entry(bond); | |
3235 | bond_create_sysfs_entry(bond); | |
3236 | up_write(&(bonding_rwsem)); | |
1da177e4 LT |
3237 | return NOTIFY_DONE; |
3238 | } | |
3239 | ||
3240 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3241 | { | |
3242 | struct bonding *event_bond = bond_dev->priv; | |
3243 | ||
3244 | switch (event) { | |
3245 | case NETDEV_CHANGENAME: | |
3246 | return bond_event_changename(event_bond); | |
3247 | case NETDEV_UNREGISTER: | |
3248 | /* | |
3249 | * TODO: remove a bond from the list? | |
3250 | */ | |
3251 | break; | |
3252 | default: | |
3253 | break; | |
3254 | } | |
3255 | ||
3256 | return NOTIFY_DONE; | |
3257 | } | |
3258 | ||
3259 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3260 | { | |
3261 | struct net_device *bond_dev = slave_dev->master; | |
8531c5ff | 3262 | struct bonding *bond = bond_dev->priv; |
1da177e4 LT |
3263 | |
3264 | switch (event) { | |
3265 | case NETDEV_UNREGISTER: | |
3266 | if (bond_dev) { | |
3267 | bond_release(bond_dev, slave_dev); | |
3268 | } | |
3269 | break; | |
3270 | case NETDEV_CHANGE: | |
3271 | /* | |
3272 | * TODO: is this what we get if somebody | |
3273 | * sets up a hierarchical bond, then rmmod's | |
3274 | * one of the slave bonding devices? | |
3275 | */ | |
3276 | break; | |
3277 | case NETDEV_DOWN: | |
3278 | /* | |
3279 | * ... Or is it this? | |
3280 | */ | |
3281 | break; | |
3282 | case NETDEV_CHANGEMTU: | |
3283 | /* | |
3284 | * TODO: Should slaves be allowed to | |
3285 | * independently alter their MTU? For | |
3286 | * an active-backup bond, slaves need | |
3287 | * not be the same type of device, so | |
3288 | * MTUs may vary. For other modes, | |
3289 | * slaves arguably should have the | |
3290 | * same MTUs. To do this, we'd need to | |
3291 | * take over the slave's change_mtu | |
3292 | * function for the duration of their | |
3293 | * servitude. | |
3294 | */ | |
3295 | break; | |
3296 | case NETDEV_CHANGENAME: | |
3297 | /* | |
3298 | * TODO: handle changing the primary's name | |
3299 | */ | |
3300 | break; | |
8531c5ff AK |
3301 | case NETDEV_FEAT_CHANGE: |
3302 | bond_compute_features(bond); | |
3303 | break; | |
1da177e4 LT |
3304 | default: |
3305 | break; | |
3306 | } | |
3307 | ||
3308 | return NOTIFY_DONE; | |
3309 | } | |
3310 | ||
3311 | /* | |
3312 | * bond_netdev_event: handle netdev notifier chain events. | |
3313 | * | |
3314 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3315 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3316 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3317 | * dev_probe_lock). | |
3318 | */ | |
3319 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3320 | { | |
3321 | struct net_device *event_dev = (struct net_device *)ptr; | |
3322 | ||
3323 | dprintk("event_dev: %s, event: %lx\n", | |
3324 | (event_dev ? event_dev->name : "None"), | |
3325 | event); | |
3326 | ||
0b680e75 JV |
3327 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3328 | return NOTIFY_DONE; | |
3329 | ||
1da177e4 LT |
3330 | if (event_dev->flags & IFF_MASTER) { |
3331 | dprintk("IFF_MASTER\n"); | |
3332 | return bond_master_netdev_event(event, event_dev); | |
3333 | } | |
3334 | ||
3335 | if (event_dev->flags & IFF_SLAVE) { | |
3336 | dprintk("IFF_SLAVE\n"); | |
3337 | return bond_slave_netdev_event(event, event_dev); | |
3338 | } | |
3339 | ||
3340 | return NOTIFY_DONE; | |
3341 | } | |
3342 | ||
c3ade5ca JV |
3343 | /* |
3344 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3345 | * | |
3346 | * We keep track of device IPs primarily to use as source addresses in | |
3347 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3348 | * | |
3349 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3350 | */ | |
3351 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3352 | { | |
3353 | struct in_ifaddr *ifa = ptr; | |
3354 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
3355 | struct bonding *bond, *bond_next; | |
3356 | struct vlan_entry *vlan, *vlan_next; | |
3357 | ||
3358 | list_for_each_entry_safe(bond, bond_next, &bond_dev_list, bond_list) { | |
3359 | if (bond->dev == event_dev) { | |
3360 | switch (event) { | |
3361 | case NETDEV_UP: | |
3362 | bond->master_ip = ifa->ifa_local; | |
3363 | return NOTIFY_OK; | |
3364 | case NETDEV_DOWN: | |
3365 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3366 | return NOTIFY_OK; | |
3367 | default: | |
3368 | return NOTIFY_DONE; | |
3369 | } | |
3370 | } | |
3371 | ||
3372 | if (list_empty(&bond->vlan_list)) | |
3373 | continue; | |
3374 | ||
3375 | list_for_each_entry_safe(vlan, vlan_next, &bond->vlan_list, | |
3376 | vlan_list) { | |
3377 | vlan_dev = bond->vlgrp->vlan_devices[vlan->vlan_id]; | |
3378 | if (vlan_dev == event_dev) { | |
3379 | switch (event) { | |
3380 | case NETDEV_UP: | |
3381 | vlan->vlan_ip = ifa->ifa_local; | |
3382 | return NOTIFY_OK; | |
3383 | case NETDEV_DOWN: | |
3384 | vlan->vlan_ip = | |
3385 | bond_glean_dev_ip(vlan_dev); | |
3386 | return NOTIFY_OK; | |
3387 | default: | |
3388 | return NOTIFY_DONE; | |
3389 | } | |
3390 | } | |
3391 | } | |
3392 | } | |
3393 | return NOTIFY_DONE; | |
3394 | } | |
3395 | ||
1da177e4 LT |
3396 | static struct notifier_block bond_netdev_notifier = { |
3397 | .notifier_call = bond_netdev_event, | |
3398 | }; | |
3399 | ||
c3ade5ca JV |
3400 | static struct notifier_block bond_inetaddr_notifier = { |
3401 | .notifier_call = bond_inetaddr_event, | |
3402 | }; | |
3403 | ||
1da177e4 LT |
3404 | /*-------------------------- Packet type handling ---------------------------*/ |
3405 | ||
3406 | /* register to receive lacpdus on a bond */ | |
3407 | static void bond_register_lacpdu(struct bonding *bond) | |
3408 | { | |
3409 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3410 | ||
3411 | /* initialize packet type */ | |
3412 | pk_type->type = PKT_TYPE_LACPDU; | |
3413 | pk_type->dev = bond->dev; | |
3414 | pk_type->func = bond_3ad_lacpdu_recv; | |
3415 | ||
3416 | dev_add_pack(pk_type); | |
3417 | } | |
3418 | ||
3419 | /* unregister to receive lacpdus on a bond */ | |
3420 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3421 | { | |
3422 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3423 | } | |
3424 | ||
f5b2b966 JV |
3425 | void bond_register_arp(struct bonding *bond) |
3426 | { | |
3427 | struct packet_type *pt = &bond->arp_mon_pt; | |
3428 | ||
3429 | pt->type = htons(ETH_P_ARP); | |
3430 | pt->dev = NULL; /*bond->dev;XXX*/ | |
3431 | pt->func = bond_arp_rcv; | |
3432 | dev_add_pack(pt); | |
3433 | } | |
3434 | ||
3435 | void bond_unregister_arp(struct bonding *bond) | |
3436 | { | |
3437 | dev_remove_pack(&bond->arp_mon_pt); | |
3438 | } | |
3439 | ||
169a3e66 JV |
3440 | /*---------------------------- Hashing Policies -----------------------------*/ |
3441 | ||
3442 | /* | |
3443 | * Hash for the the output device based upon layer 3 and layer 4 data. If | |
3444 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is | |
3445 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3446 | */ | |
3447 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3448 | struct net_device *bond_dev, int count) | |
3449 | { | |
3450 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3451 | struct iphdr *iph = skb->nh.iph; | |
3452 | u16 *layer4hdr = (u16 *)((u32 *)iph + iph->ihl); | |
3453 | int layer4_xor = 0; | |
3454 | ||
3455 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
3456 | if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) && | |
3457 | (iph->protocol == IPPROTO_TCP || | |
3458 | iph->protocol == IPPROTO_UDP)) { | |
3459 | layer4_xor = htons((*layer4hdr ^ *(layer4hdr + 1))); | |
3460 | } | |
3461 | return (layer4_xor ^ | |
3462 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3463 | ||
3464 | } | |
3465 | ||
3466 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3467 | } | |
3468 | ||
3469 | /* | |
3470 | * Hash for the output device based upon layer 2 data | |
3471 | */ | |
3472 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3473 | struct net_device *bond_dev, int count) | |
3474 | { | |
3475 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3476 | ||
3477 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3478 | } | |
3479 | ||
1da177e4 LT |
3480 | /*-------------------------- Device entry points ----------------------------*/ |
3481 | ||
3482 | static int bond_open(struct net_device *bond_dev) | |
3483 | { | |
3484 | struct bonding *bond = bond_dev->priv; | |
3485 | struct timer_list *mii_timer = &bond->mii_timer; | |
3486 | struct timer_list *arp_timer = &bond->arp_timer; | |
3487 | ||
3488 | bond->kill_timers = 0; | |
3489 | ||
3490 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3491 | (bond->params.mode == BOND_MODE_ALB)) { | |
3492 | struct timer_list *alb_timer = &(BOND_ALB_INFO(bond).alb_timer); | |
3493 | ||
3494 | /* bond_alb_initialize must be called before the timer | |
3495 | * is started. | |
3496 | */ | |
3497 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3498 | /* something went wrong - fail the open operation */ | |
3499 | return -1; | |
3500 | } | |
3501 | ||
3502 | init_timer(alb_timer); | |
3503 | alb_timer->expires = jiffies + 1; | |
3504 | alb_timer->data = (unsigned long)bond; | |
3505 | alb_timer->function = (void *)&bond_alb_monitor; | |
3506 | add_timer(alb_timer); | |
3507 | } | |
3508 | ||
3509 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3510 | init_timer(mii_timer); | |
3511 | mii_timer->expires = jiffies + 1; | |
3512 | mii_timer->data = (unsigned long)bond_dev; | |
3513 | mii_timer->function = (void *)&bond_mii_monitor; | |
3514 | add_timer(mii_timer); | |
3515 | } | |
3516 | ||
3517 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3518 | init_timer(arp_timer); | |
3519 | arp_timer->expires = jiffies + 1; | |
3520 | arp_timer->data = (unsigned long)bond_dev; | |
3521 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
3522 | arp_timer->function = (void *)&bond_activebackup_arp_mon; | |
3523 | } else { | |
3524 | arp_timer->function = (void *)&bond_loadbalance_arp_mon; | |
3525 | } | |
f5b2b966 JV |
3526 | if (bond->params.arp_validate) |
3527 | bond_register_arp(bond); | |
3528 | ||
1da177e4 LT |
3529 | add_timer(arp_timer); |
3530 | } | |
3531 | ||
3532 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3533 | struct timer_list *ad_timer = &(BOND_AD_INFO(bond).ad_timer); | |
3534 | init_timer(ad_timer); | |
3535 | ad_timer->expires = jiffies + 1; | |
3536 | ad_timer->data = (unsigned long)bond; | |
3537 | ad_timer->function = (void *)&bond_3ad_state_machine_handler; | |
3538 | add_timer(ad_timer); | |
3539 | ||
3540 | /* register to receive LACPDUs */ | |
3541 | bond_register_lacpdu(bond); | |
3542 | } | |
3543 | ||
3544 | return 0; | |
3545 | } | |
3546 | ||
3547 | static int bond_close(struct net_device *bond_dev) | |
3548 | { | |
3549 | struct bonding *bond = bond_dev->priv; | |
3550 | ||
3551 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3552 | /* Unregister the receive of LACPDUs */ | |
3553 | bond_unregister_lacpdu(bond); | |
3554 | } | |
3555 | ||
f5b2b966 JV |
3556 | if (bond->params.arp_validate) |
3557 | bond_unregister_arp(bond); | |
3558 | ||
1da177e4 LT |
3559 | write_lock_bh(&bond->lock); |
3560 | ||
1da177e4 LT |
3561 | |
3562 | /* signal timers not to re-arm */ | |
3563 | bond->kill_timers = 1; | |
3564 | ||
3565 | write_unlock_bh(&bond->lock); | |
3566 | ||
3567 | /* del_timer_sync must run without holding the bond->lock | |
3568 | * because a running timer might be trying to hold it too | |
3569 | */ | |
3570 | ||
3571 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
3572 | del_timer_sync(&bond->mii_timer); | |
3573 | } | |
3574 | ||
3575 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
3576 | del_timer_sync(&bond->arp_timer); | |
3577 | } | |
3578 | ||
3579 | switch (bond->params.mode) { | |
3580 | case BOND_MODE_8023AD: | |
3581 | del_timer_sync(&(BOND_AD_INFO(bond).ad_timer)); | |
3582 | break; | |
3583 | case BOND_MODE_TLB: | |
3584 | case BOND_MODE_ALB: | |
3585 | del_timer_sync(&(BOND_ALB_INFO(bond).alb_timer)); | |
3586 | break; | |
3587 | default: | |
3588 | break; | |
3589 | } | |
3590 | ||
1da177e4 LT |
3591 | |
3592 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3593 | (bond->params.mode == BOND_MODE_ALB)) { | |
3594 | /* Must be called only after all | |
3595 | * slaves have been released | |
3596 | */ | |
3597 | bond_alb_deinitialize(bond); | |
3598 | } | |
3599 | ||
3600 | return 0; | |
3601 | } | |
3602 | ||
3603 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3604 | { | |
3605 | struct bonding *bond = bond_dev->priv; | |
3606 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
3607 | struct slave *slave; | |
3608 | int i; | |
3609 | ||
3610 | memset(stats, 0, sizeof(struct net_device_stats)); | |
3611 | ||
3612 | read_lock_bh(&bond->lock); | |
3613 | ||
3614 | bond_for_each_slave(bond, slave, i) { | |
418e8f3d LR |
3615 | if (slave->dev->get_stats) { |
3616 | sstats = slave->dev->get_stats(slave->dev); | |
3617 | ||
3618 | stats->rx_packets += sstats->rx_packets; | |
3619 | stats->rx_bytes += sstats->rx_bytes; | |
3620 | stats->rx_errors += sstats->rx_errors; | |
3621 | stats->rx_dropped += sstats->rx_dropped; | |
3622 | ||
3623 | stats->tx_packets += sstats->tx_packets; | |
3624 | stats->tx_bytes += sstats->tx_bytes; | |
3625 | stats->tx_errors += sstats->tx_errors; | |
3626 | stats->tx_dropped += sstats->tx_dropped; | |
3627 | ||
3628 | stats->multicast += sstats->multicast; | |
3629 | stats->collisions += sstats->collisions; | |
3630 | ||
3631 | stats->rx_length_errors += sstats->rx_length_errors; | |
3632 | stats->rx_over_errors += sstats->rx_over_errors; | |
3633 | stats->rx_crc_errors += sstats->rx_crc_errors; | |
3634 | stats->rx_frame_errors += sstats->rx_frame_errors; | |
3635 | stats->rx_fifo_errors += sstats->rx_fifo_errors; | |
3636 | stats->rx_missed_errors += sstats->rx_missed_errors; | |
3637 | ||
3638 | stats->tx_aborted_errors += sstats->tx_aborted_errors; | |
3639 | stats->tx_carrier_errors += sstats->tx_carrier_errors; | |
3640 | stats->tx_fifo_errors += sstats->tx_fifo_errors; | |
3641 | stats->tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3642 | stats->tx_window_errors += sstats->tx_window_errors; | |
3643 | } | |
1da177e4 LT |
3644 | } |
3645 | ||
3646 | read_unlock_bh(&bond->lock); | |
3647 | ||
3648 | return stats; | |
3649 | } | |
3650 | ||
3651 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3652 | { | |
3653 | struct net_device *slave_dev = NULL; | |
3654 | struct ifbond k_binfo; | |
3655 | struct ifbond __user *u_binfo = NULL; | |
3656 | struct ifslave k_sinfo; | |
3657 | struct ifslave __user *u_sinfo = NULL; | |
3658 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3659 | int res = 0; |
3660 | ||
3661 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3662 | bond_dev->name, cmd); | |
3663 | ||
3664 | switch (cmd) { | |
1da177e4 LT |
3665 | case SIOCGMIIPHY: |
3666 | mii = if_mii(ifr); | |
3667 | if (!mii) { | |
3668 | return -EINVAL; | |
3669 | } | |
3670 | mii->phy_id = 0; | |
3671 | /* Fall Through */ | |
3672 | case SIOCGMIIREG: | |
3673 | /* | |
3674 | * We do this again just in case we were called by SIOCGMIIREG | |
3675 | * instead of SIOCGMIIPHY. | |
3676 | */ | |
3677 | mii = if_mii(ifr); | |
3678 | if (!mii) { | |
3679 | return -EINVAL; | |
3680 | } | |
3681 | ||
3682 | if (mii->reg_num == 1) { | |
3683 | struct bonding *bond = bond_dev->priv; | |
3684 | mii->val_out = 0; | |
3685 | read_lock_bh(&bond->lock); | |
3686 | read_lock(&bond->curr_slave_lock); | |
4e140079 | 3687 | if (netif_carrier_ok(bond->dev)) { |
1da177e4 LT |
3688 | mii->val_out = BMSR_LSTATUS; |
3689 | } | |
3690 | read_unlock(&bond->curr_slave_lock); | |
3691 | read_unlock_bh(&bond->lock); | |
3692 | } | |
3693 | ||
3694 | return 0; | |
3695 | case BOND_INFO_QUERY_OLD: | |
3696 | case SIOCBONDINFOQUERY: | |
3697 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3698 | ||
3699 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3700 | return -EFAULT; | |
3701 | } | |
3702 | ||
3703 | res = bond_info_query(bond_dev, &k_binfo); | |
3704 | if (res == 0) { | |
3705 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3706 | return -EFAULT; | |
3707 | } | |
3708 | } | |
3709 | ||
3710 | return res; | |
3711 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3712 | case SIOCBONDSLAVEINFOQUERY: | |
3713 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
3714 | ||
3715 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
3716 | return -EFAULT; | |
3717 | } | |
3718 | ||
3719 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
3720 | if (res == 0) { | |
3721 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
3722 | return -EFAULT; | |
3723 | } | |
3724 | } | |
3725 | ||
3726 | return res; | |
3727 | default: | |
3728 | /* Go on */ | |
3729 | break; | |
3730 | } | |
3731 | ||
3732 | if (!capable(CAP_NET_ADMIN)) { | |
3733 | return -EPERM; | |
3734 | } | |
3735 | ||
b76cdba9 | 3736 | down_write(&(bonding_rwsem)); |
1da177e4 LT |
3737 | slave_dev = dev_get_by_name(ifr->ifr_slave); |
3738 | ||
3739 | dprintk("slave_dev=%p: \n", slave_dev); | |
3740 | ||
3741 | if (!slave_dev) { | |
3742 | res = -ENODEV; | |
3743 | } else { | |
3744 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
3745 | switch (cmd) { | |
3746 | case BOND_ENSLAVE_OLD: | |
3747 | case SIOCBONDENSLAVE: | |
3748 | res = bond_enslave(bond_dev, slave_dev); | |
3749 | break; | |
3750 | case BOND_RELEASE_OLD: | |
3751 | case SIOCBONDRELEASE: | |
3752 | res = bond_release(bond_dev, slave_dev); | |
3753 | break; | |
3754 | case BOND_SETHWADDR_OLD: | |
3755 | case SIOCBONDSETHWADDR: | |
3756 | res = bond_sethwaddr(bond_dev, slave_dev); | |
3757 | break; | |
3758 | case BOND_CHANGE_ACTIVE_OLD: | |
3759 | case SIOCBONDCHANGEACTIVE: | |
3760 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
3761 | break; | |
3762 | default: | |
3763 | res = -EOPNOTSUPP; | |
3764 | } | |
3765 | ||
3766 | dev_put(slave_dev); | |
3767 | } | |
3768 | ||
b76cdba9 | 3769 | up_write(&(bonding_rwsem)); |
1da177e4 LT |
3770 | return res; |
3771 | } | |
3772 | ||
3773 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
3774 | { | |
3775 | struct bonding *bond = bond_dev->priv; | |
3776 | struct dev_mc_list *dmi; | |
3777 | ||
3778 | write_lock_bh(&bond->lock); | |
3779 | ||
3780 | /* | |
3781 | * Do promisc before checking multicast_mode | |
3782 | */ | |
3783 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
3784 | bond_set_promiscuity(bond, 1); | |
3785 | } | |
3786 | ||
3787 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
3788 | bond_set_promiscuity(bond, -1); | |
3789 | } | |
3790 | ||
3791 | /* set allmulti flag to slaves */ | |
3792 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
3793 | bond_set_allmulti(bond, 1); | |
3794 | } | |
3795 | ||
3796 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
3797 | bond_set_allmulti(bond, -1); | |
3798 | } | |
3799 | ||
3800 | bond->flags = bond_dev->flags; | |
3801 | ||
3802 | /* looking for addresses to add to slaves' mc list */ | |
3803 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
3804 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
3805 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3806 | } | |
3807 | } | |
3808 | ||
3809 | /* looking for addresses to delete from slaves' list */ | |
3810 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
3811 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
3812 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
3813 | } | |
3814 | } | |
3815 | ||
3816 | /* save master's multicast list */ | |
3817 | bond_mc_list_destroy(bond); | |
3818 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
3819 | ||
3820 | write_unlock_bh(&bond->lock); | |
3821 | } | |
3822 | ||
3823 | /* | |
3824 | * Change the MTU of all of a master's slaves to match the master | |
3825 | */ | |
3826 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
3827 | { | |
3828 | struct bonding *bond = bond_dev->priv; | |
3829 | struct slave *slave, *stop_at; | |
3830 | int res = 0; | |
3831 | int i; | |
3832 | ||
3833 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
3834 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
3835 | ||
3836 | /* Can't hold bond->lock with bh disabled here since | |
3837 | * some base drivers panic. On the other hand we can't | |
3838 | * hold bond->lock without bh disabled because we'll | |
3839 | * deadlock. The only solution is to rely on the fact | |
3840 | * that we're under rtnl_lock here, and the slaves | |
3841 | * list won't change. This doesn't solve the problem | |
3842 | * of setting the slave's MTU while it is | |
3843 | * transmitting, but the assumption is that the base | |
3844 | * driver can handle that. | |
3845 | * | |
3846 | * TODO: figure out a way to safely iterate the slaves | |
3847 | * list, but without holding a lock around the actual | |
3848 | * call to the base driver. | |
3849 | */ | |
3850 | ||
3851 | bond_for_each_slave(bond, slave, i) { | |
3852 | dprintk("s %p s->p %p c_m %p\n", slave, | |
3853 | slave->prev, slave->dev->change_mtu); | |
e944ef79 | 3854 | |
1da177e4 LT |
3855 | res = dev_set_mtu(slave->dev, new_mtu); |
3856 | ||
3857 | if (res) { | |
3858 | /* If we failed to set the slave's mtu to the new value | |
3859 | * we must abort the operation even in ACTIVE_BACKUP | |
3860 | * mode, because if we allow the backup slaves to have | |
3861 | * different mtu values than the active slave we'll | |
3862 | * need to change their mtu when doing a failover. That | |
3863 | * means changing their mtu from timer context, which | |
3864 | * is probably not a good idea. | |
3865 | */ | |
3866 | dprintk("err %d %s\n", res, slave->dev->name); | |
3867 | goto unwind; | |
3868 | } | |
3869 | } | |
3870 | ||
3871 | bond_dev->mtu = new_mtu; | |
3872 | ||
3873 | return 0; | |
3874 | ||
3875 | unwind: | |
3876 | /* unwind from head to the slave that failed */ | |
3877 | stop_at = slave; | |
3878 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3879 | int tmp_res; | |
3880 | ||
3881 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
3882 | if (tmp_res) { | |
3883 | dprintk("unwind err %d dev %s\n", tmp_res, | |
3884 | slave->dev->name); | |
3885 | } | |
3886 | } | |
3887 | ||
3888 | return res; | |
3889 | } | |
3890 | ||
3891 | /* | |
3892 | * Change HW address | |
3893 | * | |
3894 | * Note that many devices must be down to change the HW address, and | |
3895 | * downing the master releases all slaves. We can make bonds full of | |
3896 | * bonding devices to test this, however. | |
3897 | */ | |
3898 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
3899 | { | |
3900 | struct bonding *bond = bond_dev->priv; | |
3901 | struct sockaddr *sa = addr, tmp_sa; | |
3902 | struct slave *slave, *stop_at; | |
3903 | int res = 0; | |
3904 | int i; | |
3905 | ||
3906 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
3907 | ||
3908 | if (!is_valid_ether_addr(sa->sa_data)) { | |
3909 | return -EADDRNOTAVAIL; | |
3910 | } | |
3911 | ||
3912 | /* Can't hold bond->lock with bh disabled here since | |
3913 | * some base drivers panic. On the other hand we can't | |
3914 | * hold bond->lock without bh disabled because we'll | |
3915 | * deadlock. The only solution is to rely on the fact | |
3916 | * that we're under rtnl_lock here, and the slaves | |
3917 | * list won't change. This doesn't solve the problem | |
3918 | * of setting the slave's hw address while it is | |
3919 | * transmitting, but the assumption is that the base | |
3920 | * driver can handle that. | |
3921 | * | |
3922 | * TODO: figure out a way to safely iterate the slaves | |
3923 | * list, but without holding a lock around the actual | |
3924 | * call to the base driver. | |
3925 | */ | |
3926 | ||
3927 | bond_for_each_slave(bond, slave, i) { | |
3928 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
3929 | ||
3930 | if (slave->dev->set_mac_address == NULL) { | |
3931 | res = -EOPNOTSUPP; | |
3932 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
3933 | goto unwind; | |
3934 | } | |
3935 | ||
3936 | res = dev_set_mac_address(slave->dev, addr); | |
3937 | if (res) { | |
3938 | /* TODO: consider downing the slave | |
3939 | * and retry ? | |
3940 | * User should expect communications | |
3941 | * breakage anyway until ARP finish | |
3942 | * updating, so... | |
3943 | */ | |
3944 | dprintk("err %d %s\n", res, slave->dev->name); | |
3945 | goto unwind; | |
3946 | } | |
3947 | } | |
3948 | ||
3949 | /* success */ | |
3950 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
3951 | return 0; | |
3952 | ||
3953 | unwind: | |
3954 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
3955 | tmp_sa.sa_family = bond_dev->type; | |
3956 | ||
3957 | /* unwind from head to the slave that failed */ | |
3958 | stop_at = slave; | |
3959 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
3960 | int tmp_res; | |
3961 | ||
3962 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
3963 | if (tmp_res) { | |
3964 | dprintk("unwind err %d dev %s\n", tmp_res, | |
3965 | slave->dev->name); | |
3966 | } | |
3967 | } | |
3968 | ||
3969 | return res; | |
3970 | } | |
3971 | ||
3972 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
3973 | { | |
3974 | struct bonding *bond = bond_dev->priv; | |
3975 | struct slave *slave, *start_at; | |
3976 | int i; | |
3977 | int res = 1; | |
3978 | ||
3979 | read_lock(&bond->lock); | |
3980 | ||
3981 | if (!BOND_IS_OK(bond)) { | |
3982 | goto out; | |
3983 | } | |
3984 | ||
3985 | read_lock(&bond->curr_slave_lock); | |
3986 | slave = start_at = bond->curr_active_slave; | |
3987 | read_unlock(&bond->curr_slave_lock); | |
3988 | ||
3989 | if (!slave) { | |
3990 | goto out; | |
3991 | } | |
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 | ||
3999 | write_lock(&bond->curr_slave_lock); | |
4000 | bond->curr_active_slave = slave->next; | |
4001 | write_unlock(&bond->curr_slave_lock); | |
4002 | ||
4003 | break; | |
4004 | } | |
4005 | } | |
4006 | ||
4007 | ||
4008 | out: | |
4009 | if (res) { | |
4010 | /* no suitable interface, frame not sent */ | |
4011 | dev_kfree_skb(skb); | |
4012 | } | |
4013 | read_unlock(&bond->lock); | |
4014 | return 0; | |
4015 | } | |
4016 | ||
075897ce | 4017 | static void bond_activebackup_xmit_copy(struct sk_buff *skb, |
df49898a JL |
4018 | struct bonding *bond, |
4019 | struct slave *slave) | |
075897ce JL |
4020 | { |
4021 | struct sk_buff *skb2 = skb_copy(skb, GFP_ATOMIC); | |
4022 | struct ethhdr *eth_data; | |
4023 | u8 *hwaddr; | |
4024 | int res; | |
4025 | ||
4026 | if (!skb2) { | |
4027 | printk(KERN_ERR DRV_NAME ": Error: " | |
4028 | "bond_activebackup_xmit_copy(): skb_copy() failed\n"); | |
4029 | return; | |
4030 | } | |
4031 | ||
4032 | skb2->mac.raw = (unsigned char *)skb2->data; | |
4033 | eth_data = eth_hdr(skb2); | |
4034 | ||
df49898a JL |
4035 | /* Pick an appropriate source MAC address |
4036 | * -- use slave's perm MAC addr, unless used by bond | |
4037 | * -- otherwise, borrow active slave's perm MAC addr | |
4038 | * since that will not be used | |
4039 | */ | |
075897ce JL |
4040 | hwaddr = slave->perm_hwaddr; |
4041 | if (!memcmp(eth_data->h_source, hwaddr, ETH_ALEN)) | |
4042 | hwaddr = bond->curr_active_slave->perm_hwaddr; | |
4043 | ||
4044 | /* Set source MAC address appropriately */ | |
4045 | memcpy(eth_data->h_source, hwaddr, ETH_ALEN); | |
4046 | ||
4047 | res = bond_dev_queue_xmit(bond, skb2, slave->dev); | |
4048 | if (res) | |
4049 | dev_kfree_skb(skb2); | |
4050 | ||
4051 | return; | |
4052 | } | |
4053 | ||
1da177e4 LT |
4054 | /* |
4055 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4056 | * the bond has a usable interface. | |
4057 | */ | |
4058 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4059 | { | |
4060 | struct bonding *bond = bond_dev->priv; | |
4061 | int res = 1; | |
4062 | ||
1da177e4 LT |
4063 | read_lock(&bond->lock); |
4064 | read_lock(&bond->curr_slave_lock); | |
4065 | ||
4066 | if (!BOND_IS_OK(bond)) { | |
4067 | goto out; | |
4068 | } | |
4069 | ||
075897ce JL |
4070 | if (!bond->curr_active_slave) |
4071 | goto out; | |
4072 | ||
4073 | /* Xmit IGMP frames on all slaves to ensure rapid fail-over | |
4074 | for multicast traffic on snooping switches */ | |
4075 | if (skb->protocol == __constant_htons(ETH_P_IP) && | |
4076 | skb->nh.iph->protocol == IPPROTO_IGMP) { | |
4077 | struct slave *slave, *active_slave; | |
4078 | int i; | |
4079 | ||
4080 | active_slave = bond->curr_active_slave; | |
4081 | bond_for_each_slave_from_to(bond, slave, i, active_slave->next, | |
4082 | active_slave->prev) | |
4083 | if (IS_UP(slave->dev) && | |
4084 | (slave->link == BOND_LINK_UP)) | |
4085 | bond_activebackup_xmit_copy(skb, bond, slave); | |
1da177e4 LT |
4086 | } |
4087 | ||
075897ce JL |
4088 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4089 | ||
1da177e4 LT |
4090 | out: |
4091 | if (res) { | |
4092 | /* no suitable interface, frame not sent */ | |
4093 | dev_kfree_skb(skb); | |
4094 | } | |
4095 | read_unlock(&bond->curr_slave_lock); | |
4096 | read_unlock(&bond->lock); | |
4097 | return 0; | |
4098 | } | |
4099 | ||
4100 | /* | |
169a3e66 JV |
4101 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4102 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4103 | * find the next active slave. | |
1da177e4 LT |
4104 | */ |
4105 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4106 | { | |
4107 | struct bonding *bond = bond_dev->priv; | |
1da177e4 LT |
4108 | struct slave *slave, *start_at; |
4109 | int slave_no; | |
4110 | int i; | |
4111 | int res = 1; | |
4112 | ||
4113 | read_lock(&bond->lock); | |
4114 | ||
4115 | if (!BOND_IS_OK(bond)) { | |
4116 | goto out; | |
4117 | } | |
4118 | ||
169a3e66 | 4119 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
4120 | |
4121 | bond_for_each_slave(bond, slave, i) { | |
4122 | slave_no--; | |
4123 | if (slave_no < 0) { | |
4124 | break; | |
4125 | } | |
4126 | } | |
4127 | ||
4128 | start_at = slave; | |
4129 | ||
4130 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4131 | if (IS_UP(slave->dev) && | |
4132 | (slave->link == BOND_LINK_UP) && | |
4133 | (slave->state == BOND_STATE_ACTIVE)) { | |
4134 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4135 | break; | |
4136 | } | |
4137 | } | |
4138 | ||
4139 | out: | |
4140 | if (res) { | |
4141 | /* no suitable interface, frame not sent */ | |
4142 | dev_kfree_skb(skb); | |
4143 | } | |
4144 | read_unlock(&bond->lock); | |
4145 | return 0; | |
4146 | } | |
4147 | ||
4148 | /* | |
4149 | * in broadcast mode, we send everything to all usable interfaces. | |
4150 | */ | |
4151 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4152 | { | |
4153 | struct bonding *bond = bond_dev->priv; | |
4154 | struct slave *slave, *start_at; | |
4155 | struct net_device *tx_dev = NULL; | |
4156 | int i; | |
4157 | int res = 1; | |
4158 | ||
4159 | read_lock(&bond->lock); | |
4160 | ||
4161 | if (!BOND_IS_OK(bond)) { | |
4162 | goto out; | |
4163 | } | |
4164 | ||
4165 | read_lock(&bond->curr_slave_lock); | |
4166 | start_at = bond->curr_active_slave; | |
4167 | read_unlock(&bond->curr_slave_lock); | |
4168 | ||
4169 | if (!start_at) { | |
4170 | goto out; | |
4171 | } | |
4172 | ||
4173 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4174 | if (IS_UP(slave->dev) && | |
4175 | (slave->link == BOND_LINK_UP) && | |
4176 | (slave->state == BOND_STATE_ACTIVE)) { | |
4177 | if (tx_dev) { | |
4178 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4179 | if (!skb2) { | |
4180 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4181 | ": %s: Error: bond_xmit_broadcast(): " |
4182 | "skb_clone() failed\n", | |
4183 | bond_dev->name); | |
1da177e4 LT |
4184 | continue; |
4185 | } | |
4186 | ||
4187 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4188 | if (res) { | |
4189 | dev_kfree_skb(skb2); | |
4190 | continue; | |
4191 | } | |
4192 | } | |
4193 | tx_dev = slave->dev; | |
4194 | } | |
4195 | } | |
4196 | ||
4197 | if (tx_dev) { | |
4198 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4199 | } | |
4200 | ||
4201 | out: | |
4202 | if (res) { | |
4203 | /* no suitable interface, frame not sent */ | |
4204 | dev_kfree_skb(skb); | |
4205 | } | |
4206 | /* frame sent to all suitable interfaces */ | |
4207 | read_unlock(&bond->lock); | |
4208 | return 0; | |
4209 | } | |
4210 | ||
4211 | /*------------------------- Device initialization ---------------------------*/ | |
4212 | ||
4213 | /* | |
4214 | * set bond mode specific net device operations | |
4215 | */ | |
a77b5325 | 4216 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4217 | { |
169a3e66 JV |
4218 | struct net_device *bond_dev = bond->dev; |
4219 | ||
1da177e4 LT |
4220 | switch (mode) { |
4221 | case BOND_MODE_ROUNDROBIN: | |
4222 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4223 | break; | |
4224 | case BOND_MODE_ACTIVEBACKUP: | |
4225 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4226 | break; | |
4227 | case BOND_MODE_XOR: | |
4228 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
169a3e66 JV |
4229 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4230 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4231 | else | |
4232 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 LT |
4233 | break; |
4234 | case BOND_MODE_BROADCAST: | |
4235 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4236 | break; | |
4237 | case BOND_MODE_8023AD: | |
8f903c70 | 4238 | bond_set_master_3ad_flags(bond); |
1da177e4 | 4239 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; |
169a3e66 JV |
4240 | if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER34) |
4241 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4242 | else | |
4243 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
1da177e4 | 4244 | break; |
1da177e4 | 4245 | case BOND_MODE_ALB: |
8f903c70 JV |
4246 | bond_set_master_alb_flags(bond); |
4247 | /* FALLTHRU */ | |
4248 | case BOND_MODE_TLB: | |
1da177e4 LT |
4249 | bond_dev->hard_start_xmit = bond_alb_xmit; |
4250 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4251 | break; | |
4252 | default: | |
4253 | /* Should never happen, mode already checked */ | |
4254 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4255 | ": %s: Error: Unknown bonding mode %d\n", |
4256 | bond_dev->name, | |
1da177e4 LT |
4257 | mode); |
4258 | break; | |
4259 | } | |
4260 | } | |
4261 | ||
217df670 JV |
4262 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4263 | struct ethtool_drvinfo *drvinfo) | |
4264 | { | |
4265 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4266 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4267 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4268 | } | |
4269 | ||
7282d491 | 4270 | static const struct ethtool_ops bond_ethtool_ops = { |
8531c5ff | 4271 | .get_tx_csum = ethtool_op_get_tx_csum, |
a0de3adf JV |
4272 | .get_tso = ethtool_op_get_tso, |
4273 | .get_ufo = ethtool_op_get_ufo, | |
8531c5ff | 4274 | .get_sg = ethtool_op_get_sg, |
217df670 | 4275 | .get_drvinfo = bond_ethtool_get_drvinfo, |
8531c5ff AK |
4276 | }; |
4277 | ||
1da177e4 LT |
4278 | /* |
4279 | * Does not allocate but creates a /proc entry. | |
4280 | * Allowed to fail. | |
4281 | */ | |
3c535952 | 4282 | static int bond_init(struct net_device *bond_dev, struct bond_params *params) |
1da177e4 LT |
4283 | { |
4284 | struct bonding *bond = bond_dev->priv; | |
4285 | ||
4286 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4287 | ||
4288 | /* initialize rwlocks */ | |
4289 | rwlock_init(&bond->lock); | |
4290 | rwlock_init(&bond->curr_slave_lock); | |
4291 | ||
4292 | bond->params = *params; /* copy params struct */ | |
4293 | ||
4294 | /* Initialize pointers */ | |
4295 | bond->first_slave = NULL; | |
4296 | bond->curr_active_slave = NULL; | |
4297 | bond->current_arp_slave = NULL; | |
4298 | bond->primary_slave = NULL; | |
4299 | bond->dev = bond_dev; | |
4300 | INIT_LIST_HEAD(&bond->vlan_list); | |
4301 | ||
4302 | /* Initialize the device entry points */ | |
4303 | bond_dev->open = bond_open; | |
4304 | bond_dev->stop = bond_close; | |
4305 | bond_dev->get_stats = bond_get_stats; | |
4306 | bond_dev->do_ioctl = bond_do_ioctl; | |
8531c5ff | 4307 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 LT |
4308 | bond_dev->set_multicast_list = bond_set_multicast_list; |
4309 | bond_dev->change_mtu = bond_change_mtu; | |
4310 | bond_dev->set_mac_address = bond_set_mac_address; | |
4311 | ||
169a3e66 | 4312 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 LT |
4313 | |
4314 | bond_dev->destructor = free_netdev; | |
4315 | ||
4316 | /* Initialize the device options */ | |
4317 | bond_dev->tx_queue_len = 0; | |
4318 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4319 | bond_dev->priv_flags |= IFF_BONDING; |
1da177e4 LT |
4320 | |
4321 | /* At first, we block adding VLANs. That's the only way to | |
4322 | * prevent problems that occur when adding VLANs over an | |
4323 | * empty bond. The block will be removed once non-challenged | |
4324 | * slaves are enslaved. | |
4325 | */ | |
4326 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4327 | ||
932ff279 | 4328 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4329 | * transmitting */ |
4330 | bond_dev->features |= NETIF_F_LLTX; | |
4331 | ||
4332 | /* By default, we declare the bond to be fully | |
4333 | * VLAN hardware accelerated capable. Special | |
4334 | * care is taken in the various xmit functions | |
4335 | * when there are slaves that are not hw accel | |
4336 | * capable | |
4337 | */ | |
4338 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4339 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4340 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4341 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4342 | NETIF_F_HW_VLAN_RX | | |
4343 | NETIF_F_HW_VLAN_FILTER); | |
4344 | ||
4345 | #ifdef CONFIG_PROC_FS | |
4346 | bond_create_proc_entry(bond); | |
4347 | #endif | |
4348 | ||
4349 | list_add_tail(&bond->bond_list, &bond_dev_list); | |
4350 | ||
4351 | return 0; | |
4352 | } | |
4353 | ||
4354 | /* De-initialize device specific data. | |
4355 | * Caller must hold rtnl_lock. | |
4356 | */ | |
a77b5325 | 4357 | void bond_deinit(struct net_device *bond_dev) |
1da177e4 LT |
4358 | { |
4359 | struct bonding *bond = bond_dev->priv; | |
4360 | ||
4361 | list_del(&bond->bond_list); | |
4362 | ||
4363 | #ifdef CONFIG_PROC_FS | |
4364 | bond_remove_proc_entry(bond); | |
4365 | #endif | |
4366 | } | |
4367 | ||
4368 | /* Unregister and free all bond devices. | |
4369 | * Caller must hold rtnl_lock. | |
4370 | */ | |
4371 | static void bond_free_all(void) | |
4372 | { | |
4373 | struct bonding *bond, *nxt; | |
4374 | ||
4375 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4376 | struct net_device *bond_dev = bond->dev; | |
4377 | ||
70298705 | 4378 | bond_mc_list_destroy(bond); |
4379 | /* Release the bonded slaves */ | |
4380 | bond_release_all(bond_dev); | |
1da177e4 LT |
4381 | unregister_netdevice(bond_dev); |
4382 | bond_deinit(bond_dev); | |
4383 | } | |
4384 | ||
4385 | #ifdef CONFIG_PROC_FS | |
4386 | bond_destroy_proc_dir(); | |
4387 | #endif | |
4388 | } | |
4389 | ||
4390 | /*------------------------- Module initialization ---------------------------*/ | |
4391 | ||
4392 | /* | |
4393 | * Convert string input module parms. Accept either the | |
4394 | * number of the mode or its string name. | |
4395 | */ | |
a77b5325 | 4396 | int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl) |
1da177e4 LT |
4397 | { |
4398 | int i; | |
4399 | ||
4400 | for (i = 0; tbl[i].modename; i++) { | |
4401 | if ((isdigit(*mode_arg) && | |
4402 | tbl[i].mode == simple_strtol(mode_arg, NULL, 0)) || | |
4403 | (strncmp(mode_arg, tbl[i].modename, | |
4404 | strlen(tbl[i].modename)) == 0)) { | |
4405 | return tbl[i].mode; | |
4406 | } | |
4407 | } | |
4408 | ||
4409 | return -1; | |
4410 | } | |
4411 | ||
4412 | static int bond_check_params(struct bond_params *params) | |
4413 | { | |
f5b2b966 JV |
4414 | int arp_validate_value; |
4415 | ||
1da177e4 LT |
4416 | /* |
4417 | * Convert string parameters. | |
4418 | */ | |
4419 | if (mode) { | |
4420 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4421 | if (bond_mode == -1) { | |
4422 | printk(KERN_ERR DRV_NAME | |
4423 | ": Error: Invalid bonding mode \"%s\"\n", | |
4424 | mode == NULL ? "NULL" : mode); | |
4425 | return -EINVAL; | |
4426 | } | |
4427 | } | |
4428 | ||
169a3e66 JV |
4429 | if (xmit_hash_policy) { |
4430 | if ((bond_mode != BOND_MODE_XOR) && | |
4431 | (bond_mode != BOND_MODE_8023AD)) { | |
4432 | printk(KERN_INFO DRV_NAME | |
4433 | ": xor_mode param is irrelevant in mode %s\n", | |
4434 | bond_mode_name(bond_mode)); | |
4435 | } else { | |
4436 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4437 | xmit_hashtype_tbl); | |
4438 | if (xmit_hashtype == -1) { | |
4439 | printk(KERN_ERR DRV_NAME | |
4440 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4441 | xmit_hash_policy == NULL ? "NULL" : | |
4442 | xmit_hash_policy); | |
4443 | return -EINVAL; | |
4444 | } | |
4445 | } | |
4446 | } | |
4447 | ||
1da177e4 LT |
4448 | if (lacp_rate) { |
4449 | if (bond_mode != BOND_MODE_8023AD) { | |
4450 | printk(KERN_INFO DRV_NAME | |
4451 | ": lacp_rate param is irrelevant in mode %s\n", | |
4452 | bond_mode_name(bond_mode)); | |
4453 | } else { | |
4454 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4455 | if (lacp_fast == -1) { | |
4456 | printk(KERN_ERR DRV_NAME | |
4457 | ": Error: Invalid lacp rate \"%s\"\n", | |
4458 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4459 | return -EINVAL; | |
4460 | } | |
4461 | } | |
4462 | } | |
4463 | ||
4464 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4465 | printk(KERN_WARNING DRV_NAME | |
4466 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4e0952c7 | 4467 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
1da177e4 LT |
4468 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
4469 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4470 | } | |
4471 | ||
4472 | if (miimon < 0) { | |
4473 | printk(KERN_WARNING DRV_NAME | |
4474 | ": Warning: miimon module parameter (%d), " | |
4475 | "not in range 0-%d, so it was reset to %d\n", | |
4476 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4477 | miimon = BOND_LINK_MON_INTERV; | |
4478 | } | |
4479 | ||
4480 | if (updelay < 0) { | |
4481 | printk(KERN_WARNING DRV_NAME | |
4482 | ": Warning: updelay module parameter (%d), " | |
4483 | "not in range 0-%d, so it was reset to 0\n", | |
4484 | updelay, INT_MAX); | |
4485 | updelay = 0; | |
4486 | } | |
4487 | ||
4488 | if (downdelay < 0) { | |
4489 | printk(KERN_WARNING DRV_NAME | |
4490 | ": Warning: downdelay module parameter (%d), " | |
4491 | "not in range 0-%d, so it was reset to 0\n", | |
4492 | downdelay, INT_MAX); | |
4493 | downdelay = 0; | |
4494 | } | |
4495 | ||
4496 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4497 | printk(KERN_WARNING DRV_NAME | |
4498 | ": Warning: use_carrier module parameter (%d), " | |
4499 | "not of valid value (0/1), so it was set to 1\n", | |
4500 | use_carrier); | |
4501 | use_carrier = 1; | |
4502 | } | |
4503 | ||
4504 | /* reset values for 802.3ad */ | |
4505 | if (bond_mode == BOND_MODE_8023AD) { | |
4506 | if (!miimon) { | |
4507 | printk(KERN_WARNING DRV_NAME | |
4508 | ": Warning: miimon must be specified, " | |
4509 | "otherwise bonding will not detect link " | |
4510 | "failure, speed and duplex which are " | |
4511 | "essential for 802.3ad operation\n"); | |
4512 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4513 | miimon = 100; | |
4514 | } | |
4515 | } | |
4516 | ||
4517 | /* reset values for TLB/ALB */ | |
4518 | if ((bond_mode == BOND_MODE_TLB) || | |
4519 | (bond_mode == BOND_MODE_ALB)) { | |
4520 | if (!miimon) { | |
4521 | printk(KERN_WARNING DRV_NAME | |
4522 | ": Warning: miimon must be specified, " | |
4523 | "otherwise bonding will not detect link " | |
4524 | "failure and link speed which are essential " | |
4525 | "for TLB/ALB load balancing\n"); | |
4526 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4527 | miimon = 100; | |
4528 | } | |
4529 | } | |
4530 | ||
4531 | if (bond_mode == BOND_MODE_ALB) { | |
4532 | printk(KERN_NOTICE DRV_NAME | |
4533 | ": In ALB mode you might experience client " | |
4534 | "disconnections upon reconnection of a link if the " | |
4535 | "bonding module updelay parameter (%d msec) is " | |
4536 | "incompatible with the forwarding delay time of the " | |
4537 | "switch\n", | |
4538 | updelay); | |
4539 | } | |
4540 | ||
4541 | if (!miimon) { | |
4542 | if (updelay || downdelay) { | |
4543 | /* just warn the user the up/down delay will have | |
4544 | * no effect since miimon is zero... | |
4545 | */ | |
4546 | printk(KERN_WARNING DRV_NAME | |
4547 | ": Warning: miimon module parameter not set " | |
4548 | "and updelay (%d) or downdelay (%d) module " | |
4549 | "parameter is set; updelay and downdelay have " | |
4550 | "no effect unless miimon is set\n", | |
4551 | updelay, downdelay); | |
4552 | } | |
4553 | } else { | |
4554 | /* don't allow arp monitoring */ | |
4555 | if (arp_interval) { | |
4556 | printk(KERN_WARNING DRV_NAME | |
4557 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4558 | "can't be used simultaneously, disabling ARP " | |
4559 | "monitoring\n", | |
4560 | miimon, arp_interval); | |
4561 | arp_interval = 0; | |
4562 | } | |
4563 | ||
4564 | if ((updelay % miimon) != 0) { | |
4565 | printk(KERN_WARNING DRV_NAME | |
4566 | ": Warning: updelay (%d) is not a multiple " | |
4567 | "of miimon (%d), updelay rounded to %d ms\n", | |
4568 | updelay, miimon, (updelay / miimon) * miimon); | |
4569 | } | |
4570 | ||
4571 | updelay /= miimon; | |
4572 | ||
4573 | if ((downdelay % miimon) != 0) { | |
4574 | printk(KERN_WARNING DRV_NAME | |
4575 | ": Warning: downdelay (%d) is not a multiple " | |
4576 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4577 | downdelay, miimon, | |
4578 | (downdelay / miimon) * miimon); | |
4579 | } | |
4580 | ||
4581 | downdelay /= miimon; | |
4582 | } | |
4583 | ||
4584 | if (arp_interval < 0) { | |
4585 | printk(KERN_WARNING DRV_NAME | |
4586 | ": Warning: arp_interval module parameter (%d) " | |
4587 | ", not in range 0-%d, so it was reset to %d\n", | |
4588 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4589 | arp_interval = BOND_LINK_ARP_INTERV; | |
4590 | } | |
4591 | ||
4592 | for (arp_ip_count = 0; | |
4593 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4594 | arp_ip_count++) { | |
4595 | /* not complete check, but should be good enough to | |
4596 | catch mistakes */ | |
4597 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4598 | printk(KERN_WARNING DRV_NAME | |
4599 | ": Warning: bad arp_ip_target module parameter " | |
4600 | "(%s), ARP monitoring will not be performed\n", | |
4601 | arp_ip_target[arp_ip_count]); | |
4602 | arp_interval = 0; | |
4603 | } else { | |
4604 | u32 ip = in_aton(arp_ip_target[arp_ip_count]); | |
4605 | arp_target[arp_ip_count] = ip; | |
4606 | } | |
4607 | } | |
4608 | ||
4609 | if (arp_interval && !arp_ip_count) { | |
4610 | /* don't allow arping if no arp_ip_target given... */ | |
4611 | printk(KERN_WARNING DRV_NAME | |
4612 | ": Warning: arp_interval module parameter (%d) " | |
4613 | "specified without providing an arp_ip_target " | |
4614 | "parameter, arp_interval was reset to 0\n", | |
4615 | arp_interval); | |
4616 | arp_interval = 0; | |
4617 | } | |
4618 | ||
f5b2b966 JV |
4619 | if (arp_validate) { |
4620 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
4621 | printk(KERN_ERR DRV_NAME | |
4622 | ": arp_validate only supported in active-backup mode\n"); | |
4623 | return -EINVAL; | |
4624 | } | |
4625 | if (!arp_interval) { | |
4626 | printk(KERN_ERR DRV_NAME | |
4627 | ": arp_validate requires arp_interval\n"); | |
4628 | return -EINVAL; | |
4629 | } | |
4630 | ||
4631 | arp_validate_value = bond_parse_parm(arp_validate, | |
4632 | arp_validate_tbl); | |
4633 | if (arp_validate_value == -1) { | |
4634 | printk(KERN_ERR DRV_NAME | |
4635 | ": Error: invalid arp_validate \"%s\"\n", | |
4636 | arp_validate == NULL ? "NULL" : arp_validate); | |
4637 | return -EINVAL; | |
4638 | } | |
4639 | } else | |
4640 | arp_validate_value = 0; | |
4641 | ||
1da177e4 LT |
4642 | if (miimon) { |
4643 | printk(KERN_INFO DRV_NAME | |
4644 | ": MII link monitoring set to %d ms\n", | |
4645 | miimon); | |
4646 | } else if (arp_interval) { | |
4647 | int i; | |
4648 | ||
4649 | printk(KERN_INFO DRV_NAME | |
f5b2b966 JV |
4650 | ": ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4651 | arp_interval, | |
4652 | arp_validate_tbl[arp_validate_value].modename, | |
4653 | arp_ip_count); | |
1da177e4 LT |
4654 | |
4655 | for (i = 0; i < arp_ip_count; i++) | |
4656 | printk (" %s", arp_ip_target[i]); | |
4657 | ||
4658 | printk("\n"); | |
4659 | ||
4660 | } else { | |
4661 | /* miimon and arp_interval not set, we need one so things | |
4662 | * work as expected, see bonding.txt for details | |
4663 | */ | |
4664 | printk(KERN_WARNING DRV_NAME | |
4665 | ": Warning: either miimon or arp_interval and " | |
4666 | "arp_ip_target module parameters must be specified, " | |
4667 | "otherwise bonding will not detect link failures! see " | |
4668 | "bonding.txt for details.\n"); | |
4669 | } | |
4670 | ||
4671 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4672 | /* currently, using a primary only makes sense | |
4673 | * in active backup, TLB or ALB modes | |
4674 | */ | |
4675 | printk(KERN_WARNING DRV_NAME | |
4676 | ": Warning: %s primary device specified but has no " | |
4677 | "effect in %s mode\n", | |
4678 | primary, bond_mode_name(bond_mode)); | |
4679 | primary = NULL; | |
4680 | } | |
4681 | ||
4682 | /* fill params struct with the proper values */ | |
4683 | params->mode = bond_mode; | |
169a3e66 | 4684 | params->xmit_policy = xmit_hashtype; |
1da177e4 LT |
4685 | params->miimon = miimon; |
4686 | params->arp_interval = arp_interval; | |
f5b2b966 | 4687 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
4688 | params->updelay = updelay; |
4689 | params->downdelay = downdelay; | |
4690 | params->use_carrier = use_carrier; | |
4691 | params->lacp_fast = lacp_fast; | |
4692 | params->primary[0] = 0; | |
4693 | ||
4694 | if (primary) { | |
4695 | strncpy(params->primary, primary, IFNAMSIZ); | |
4696 | params->primary[IFNAMSIZ - 1] = 0; | |
4697 | } | |
4698 | ||
4699 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
4700 | ||
4701 | return 0; | |
4702 | } | |
4703 | ||
0daa2303 PZ |
4704 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
4705 | ||
dfe60397 | 4706 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 4707 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
4708 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
4709 | * set up our sysfs entries. | |
4710 | */ | |
4711 | int bond_create(char *name, struct bond_params *params, struct bonding **newbond) | |
4712 | { | |
4713 | struct net_device *bond_dev; | |
4714 | int res; | |
4715 | ||
4716 | rtnl_lock(); | |
e4b91c48 JV |
4717 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
4718 | ether_setup); | |
dfe60397 MW |
4719 | if (!bond_dev) { |
4720 | printk(KERN_ERR DRV_NAME | |
4721 | ": %s: eek! can't alloc netdev!\n", | |
4722 | name); | |
4723 | res = -ENOMEM; | |
4724 | goto out_rtnl; | |
4725 | } | |
4726 | ||
e4b91c48 JV |
4727 | if (!name) { |
4728 | res = dev_alloc_name(bond_dev, "bond%d"); | |
4729 | if (res < 0) | |
4730 | goto out_netdev; | |
4731 | } | |
4732 | ||
dfe60397 MW |
4733 | /* bond_init() must be called after dev_alloc_name() (for the |
4734 | * /proc files), but before register_netdevice(), because we | |
4735 | * need to set function pointers. | |
4736 | */ | |
4737 | ||
4738 | res = bond_init(bond_dev, params); | |
4739 | if (res < 0) { | |
4740 | goto out_netdev; | |
4741 | } | |
4742 | ||
4743 | SET_MODULE_OWNER(bond_dev); | |
4744 | ||
4745 | res = register_netdevice(bond_dev); | |
4746 | if (res < 0) { | |
4747 | goto out_bond; | |
4748 | } | |
0daa2303 PZ |
4749 | |
4750 | lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key); | |
4751 | ||
dfe60397 MW |
4752 | if (newbond) |
4753 | *newbond = bond_dev->priv; | |
4754 | ||
ff59c456 JV |
4755 | netif_carrier_off(bond_dev); |
4756 | ||
dfe60397 | 4757 | rtnl_unlock(); /* allows sysfs registration of net device */ |
b76cdba9 | 4758 | res = bond_create_sysfs_entry(bond_dev->priv); |
09c89279 JV |
4759 | if (res < 0) { |
4760 | rtnl_lock(); | |
4761 | goto out_bond; | |
4762 | } | |
4763 | ||
4764 | return 0; | |
4765 | ||
dfe60397 MW |
4766 | out_bond: |
4767 | bond_deinit(bond_dev); | |
4768 | out_netdev: | |
4769 | free_netdev(bond_dev); | |
4770 | out_rtnl: | |
4771 | rtnl_unlock(); | |
dfe60397 MW |
4772 | return res; |
4773 | } | |
4774 | ||
1da177e4 LT |
4775 | static int __init bonding_init(void) |
4776 | { | |
1da177e4 LT |
4777 | int i; |
4778 | int res; | |
4779 | ||
4780 | printk(KERN_INFO "%s", version); | |
4781 | ||
dfe60397 | 4782 | res = bond_check_params(&bonding_defaults); |
1da177e4 | 4783 | if (res) { |
dfe60397 | 4784 | goto out; |
1da177e4 LT |
4785 | } |
4786 | ||
1da177e4 LT |
4787 | #ifdef CONFIG_PROC_FS |
4788 | bond_create_proc_dir(); | |
4789 | #endif | |
1da177e4 | 4790 | for (i = 0; i < max_bonds; i++) { |
e4b91c48 | 4791 | res = bond_create(NULL, &bonding_defaults, NULL); |
dfe60397 MW |
4792 | if (res) |
4793 | goto err; | |
1da177e4 LT |
4794 | } |
4795 | ||
b76cdba9 MW |
4796 | res = bond_create_sysfs(); |
4797 | if (res) | |
4798 | goto err; | |
4799 | ||
1da177e4 | 4800 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 4801 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 4802 | |
dfe60397 MW |
4803 | goto out; |
4804 | err: | |
40abc270 | 4805 | rtnl_lock(); |
1da177e4 | 4806 | bond_free_all(); |
b76cdba9 | 4807 | bond_destroy_sysfs(); |
1da177e4 | 4808 | rtnl_unlock(); |
dfe60397 | 4809 | out: |
1da177e4 | 4810 | return res; |
dfe60397 | 4811 | |
1da177e4 LT |
4812 | } |
4813 | ||
4814 | static void __exit bonding_exit(void) | |
4815 | { | |
4816 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 4817 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 LT |
4818 | |
4819 | rtnl_lock(); | |
4820 | bond_free_all(); | |
b76cdba9 | 4821 | bond_destroy_sysfs(); |
1da177e4 LT |
4822 | rtnl_unlock(); |
4823 | } | |
4824 | ||
4825 | module_init(bonding_init); | |
4826 | module_exit(bonding_exit); | |
4827 | MODULE_LICENSE("GPL"); | |
4828 | MODULE_VERSION(DRV_VERSION); | |
4829 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
4830 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
4831 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
4832 | ||
4833 | /* | |
4834 | * Local variables: | |
4835 | * c-indent-level: 8 | |
4836 | * c-basic-offset: 8 | |
4837 | * tab-width: 8 | |
4838 | * End: | |
4839 | */ | |
4840 |